WO2018139044A1 - Steering apparatus - Google Patents

Steering apparatus Download PDF

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Publication number
WO2018139044A1
WO2018139044A1 PCT/JP2017/042909 JP2017042909W WO2018139044A1 WO 2018139044 A1 WO2018139044 A1 WO 2018139044A1 JP 2017042909 W JP2017042909 W JP 2017042909W WO 2018139044 A1 WO2018139044 A1 WO 2018139044A1
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WO
WIPO (PCT)
Prior art keywords
steering
shaft
housing
wire
steering shaft
Prior art date
Application number
PCT/JP2017/042909
Other languages
French (fr)
Japanese (ja)
Inventor
秀 坂本
黒川 芳輝
石田 優
Original Assignee
Kyb株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyb株式会社 filed Critical Kyb株式会社
Publication of WO2018139044A1 publication Critical patent/WO2018139044A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D5/00Power-assisted or power-driven steering
    • B62D5/001Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D5/00Power-assisted or power-driven steering
    • B62D5/001Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup
    • B62D5/005Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup means for generating torque on steering wheel or input member, e.g. feedback

Definitions

  • the present invention relates to a steering device.
  • the steering device described in Patent Document 1 below includes a steering device for inputting steering by a driver and a steering device for turning wheels. Further, the steering device and the steered device are configured to be connectable by a clutch, and when the connection of both by the clutch is cut off, the steering device is executed as a steering-by-wire. Furthermore, the steering device has a reaction force motor (reaction force actuator). When the steering device is executed as steering-by-wire, the reaction force motor is operated in accordance with the reaction force received from the road surface, thereby giving a steering reaction force to the driver's steering.
  • reaction force actuator reaction force actuator
  • the reaction motor when the steering wheel is steered to a position where the maximum steering angle is obtained, the reaction motor is operated to limit the rotation of the steering wheel beyond the maximum steering angle. It is like that. Specifically, the rotation of the steering wheel is limited by controlling the reaction force motor so as to increase the torque generated by the reaction force motor. Thereby, since it is necessary to generate a predetermined torque by the reaction force motor, there is a problem that the reaction force motor is increased in size. Therefore, in a steering-by-wire type steering apparatus, it is desirable to have a structure that mechanically restricts the rotation of the steering wheel from the viewpoint of suppressing an increase in the size of the reaction force motor.
  • the present invention has an object of providing a steering device that can mechanically limit the rotation of the steering wheel in consideration of the above facts.
  • One or more embodiments of the present invention are formed in a long and flexible shape, a steering shaft that rotates as the steering wheel is steered, a housing that covers the steering shaft from the outside in the radial direction, The steering shaft and the housing are connected to each other, and the steering wheel is wound around the steering shaft in an extended state when the steering wheel is steered from the neutral position to the maximum steering position, and the steering shaft is turned to one side or the rotation direction. And a connecting member that restricts rotation on the other side in the moving direction.
  • the longitudinal ends of the connecting member are spaced apart in the axial direction of the steering shaft, and when the steering shaft is rotated from a neutral position, In the steering device, the connecting member is spirally wound around an outer peripheral portion of the steering shaft.
  • the housing is provided with a housing side connecting portion that protrudes from the housing to the steering shaft side and connects the connecting member to the housing.
  • a shaft-side connecting portion that protrudes from the steering shaft to the housing side and connects the connecting member to the steering shaft is provided, and the connecting member is formed in a circular cross section, and the housing-side connecting portion and the In the steering apparatus, a gap between the steering shaft and a gap between the shaft side connecting portion and the housing are set to be smaller than an outer diameter of the connecting member.
  • the housing side connecting portion is formed with a first insertion hole that penetrates in the axial direction of the steering shaft and through which the connecting member is inserted. Is formed with a second insertion hole penetrating in the axial direction of the steering shaft and through which the connecting member is inserted, and the housing side connecting portion is formed in the housing with the radial direction of the steering shaft as the axial direction.
  • the steering device is rotatably supported, and the shaft side connecting portion is rotatably supported by the steering shaft with the radial direction of the steering shaft as an axial direction.
  • One or more embodiments of the present invention are steering devices in which the connecting member is connected to at least one of the steering shaft and the housing by a ball joint.
  • one end in the longitudinal direction of the connecting member is fixed to the outer peripheral portion of the housing, and the connecting member is inserted into the steering shaft from an insertion hole formed in the housing.
  • This is a steering device that extends toward the vehicle.
  • the connecting member is formed in a strip shape, and the positions of both end portions in the longitudinal direction of the connecting member coincide with each other in the axial direction of the steering shaft.
  • the coupling member is wound around the outer periphery of the steering shaft with the radial direction of the steering shaft as a thickness direction.
  • One or more embodiments of the present invention are steering devices in which at least one of the longitudinal ends of the connecting member is provided with a biasing member that biases the connecting member outward in the longitudinal direction.
  • One or more embodiments of the present invention are steering devices in which the housing is provided with a holding portion that holds an end portion of the connecting member provided with the biasing member.
  • one end portion of the connecting member in the longitudinal direction is connected to a variable mechanism, and the variable mechanism operates to connect the one end portion of the connecting member in the longitudinal direction.
  • the steering device is configured to change a maximum steering position of the steering wheel by being displaced relative to a housing.
  • the housing is connected to a variable mechanism, and the variable mechanism is operated to displace the housing relative to the steering shaft, thereby the steering.
  • This is a steering device that makes the maximum steering position of the wheel variable.
  • One or more embodiments of the present invention detect or predict a breakage of the connecting member, and when the breakage detecting unit detects a breakage of the connecting member or predicts a breakage of the connecting member
  • the steering device includes a notification unit that notifies the fact.
  • One or more embodiments of the present invention are steering devices provided with a plurality of the connecting members.
  • One or more embodiments of the present invention are provided on a steering shaft that rotates with steering of a steering wheel, a housing that covers the steering shaft from a radially outer side, a radially outer side of the steering shaft, A nut that is moved in the axial direction of the steering shaft by a screw mechanism when the steering shaft rotates, and one side or a rotation direction of the steering shaft when the steering wheel is rotated from the neutral position to the maximum steering position.
  • a rotation limiting mechanism for limiting rotation on the other side of the moving direction, and the rotation limiting mechanism is formed in an elongated shape having flexibility, and extends from the nut to one side in the axial direction of the steering shaft.
  • a first connecting member that extends and connects the nut and the housing; And is configured to include at least one of a second connecting member that extends from the nut to the other axial side of the steering shaft and connects the nut and the housing.
  • the steering device is configured such that when the steering wheel is rotated from the neutral position to the maximum steering position, the first connecting member or the second connecting member is extended in the longitudinal direction to restrict the movement of the nut. It is.
  • FIG. 1 is a schematic diagram illustrating an entire steering apparatus according to a first embodiment. It is a perspective view which shows the state before the action
  • (A) is sectional drawing which shows the variation 1 of the rotation limitation mechanism shown by FIG. 1 (B),
  • (B) is a cross section which shows the variation 2 of the rotation limitation mechanism shown by FIG. 1 (B).
  • FIG. It is sectional drawing which shows the variation 3 of the rotation limitation mechanism shown by FIG. 1 (B).
  • (A) is sectional drawing which shows the 1st connection shaft periphery in the rotation limiting mechanism used for the steering apparatus of the steering apparatus which concerns on 2nd Embodiment
  • (B) is 2nd Embodiment.
  • (A) is sectional drawing which shows another example of the connection of a wire and a housing in the rotation limiting mechanism of 2nd Embodiment
  • (B) is the rotation limiting mechanism of 2nd Embodiment.
  • (A) is sectional drawing which shows the 1st connection shaft periphery in the rotation limiting mechanism used for the steering apparatus of the steering device which concerns on 3rd Embodiment
  • (B) is a rotation shown by (A). It is sectional drawing which shows the state after the action
  • FIG. 13 is a cross-sectional view (a cross-sectional view taken along line 12B-12B in FIG. 12A) of a first modification of the variable mechanism. It is sectional drawing which shows the modification 2 of the variable mechanism used for the rotation limitation mechanism of 4th Embodiment. It is sectional drawing which shows the modification 3 of the variable mechanism used for the rotation restriction mechanism of 4th Embodiment. It is sectional drawing which shows the state after the action
  • FIG. 17 is a cross-sectional view (a cross-sectional view taken along line 16B-16B in FIG. 16A) showing the periphery of the first stopper and the second stopper of the rotation limiting mechanism shown in FIG. It is sectional drawing which shows the rotation limiting mechanism used for the steering apparatus of the steering device which concerns on 7th Embodiment.
  • the steering apparatus 10 is installed at the front of a vehicle (automobile).
  • the steering device 10 includes a steering device 12 that is steered by a driver, and a steering device 30 that steers a wheel (front wheel) H of the vehicle.
  • the mechanical connection of the device 30 is disconnected.
  • the steering device 10 includes a control unit (ECU) 40 that controls the steering device 12 and the steering device 30. That is, the steering device 10 is configured as a so-called steering-by-wire type steering device.
  • ECU control unit
  • the steering device 12 includes a steering shaft 14, a steering wheel 16, a steering angle sensor 18, a torque sensor 20, a reaction force motor (reaction force actuator) 22, and a rotation limiting mechanism 24.
  • the steering shaft 14 is formed in a substantially round bar shape and extends in the front-rear direction when viewed from the vehicle upper side. Specifically, although illustration is omitted, the steering shaft 14 is disposed so as to incline toward the vehicle upper side toward the vehicle rear side, and the rear end portion (one side in the axial direction of the steering shaft 14 (in FIG. 2)). The end portion of the arrow A direction side) is disposed in front of the driver's seat in the cabin of the vehicle. Further, the steering shaft 14 is rotatably supported by a steering housing 12A that constitutes the outline of the steering device 12, and the steering housing 12A is fixed to the vehicle body by a bracket or the like (not shown).
  • the steering wheel 16 is formed in a substantially annular shape, and is fixed to the rear end portion of the steering shaft 14 via a spoke (not shown) so as to be integrally rotatable. Thereby, the steering shaft 16 is rotated about its own axis by rotating the steering wheel 16 to one side or the other side of the rotation direction.
  • the allowable steering angle of the steering wheel 16 is set to 720 ° as an example. That is, the maximum steering angle of the steering wheel 16 (the maximum angle at which the steering wheel 16 can rotate from the neutral position (the position of the steering wheel 16 when the vehicle travels forward) to the one side or the other side) is set to 360 °. .
  • the position of the steering wheel 16 when it is steered to the maximum steering angle is referred to as “maximum steering position”. Further, when the steering wheel 16 is rotated to the maximum steering position, the rotation of the steering wheel 16 is limited by a rotation limiting mechanism 24 described later. The details of the rotation limiting mechanism 24 will be described later.
  • the steering angle sensor 18 is provided on one side of the steering shaft 14 in the axial direction.
  • the steering angle sensor 18 is configured as a sensor using a resolver, for example, and detects the steering angle of the steering shaft 14.
  • the steering angle sensor 18 is electrically connected to the control unit 40, and is configured to output the detected steering angle of the steering shaft 14 to the control unit 40.
  • the torque sensor 20 is provided on the one side in the axial direction of the steering shaft 14 and on the distal end side of the steering shaft 14 with respect to the steering angle sensor 18. This torque sensor 20 detects the steering torque of the steering shaft 14.
  • the torque sensor 20 is electrically connected to the control unit 40 and is configured to output the detected steering torque of the steering shaft 14 to the control unit 40.
  • the reaction force motor 22 is provided at the end of the front end side of the steering shaft 14 (the other side in the axial direction (arrow B direction in FIG. 2) and the front side of the vehicle) and is electrically connected to the control unit 40. ing. Then, the reaction force motor 22 is operated by the control of the control unit 40, so that torque on the opposite side to the steering direction is generated in the steering wheel 16.
  • the steering device 30 is disposed between a pair of left and right wheels H of the vehicle in a power unit chamber (not shown) of the vehicle, and extends in the left-right direction (vehicle width direction) of the vehicle.
  • the steered device 30 has a steered rod 32 that extends in the left-right direction of the vehicle, and both longitudinal ends of the steered rod 32 are connected to wheels H via tie rods 34.
  • a rack portion (not shown) is formed in the middle portion in the longitudinal direction of the steered rod 32, and a pinion (not shown) connected to the steered motor 36 is engaged with the rack portion.
  • the steered motor 36 is electrically connected to the control unit 40, and the wheels H are steered when the steered motor 36 is driven by the control of the control unit 40.
  • the steered motor 36 is provided with a steered sensor 38, and the steered sensor 38 detects a reaction force acting on the wheel H as a current depending on the road surface condition, and outputs it to the control unit 40. It has become.
  • the control unit 40 is configured to drive the reaction force motor 22 based on the output from the steering sensor 38.
  • the rotation limiting mechanism 24 that is a main part of the present invention will be described.
  • the rotation limiting mechanism 24 constitutes a part of the steering device 12 and is disposed between the reaction force motor 22 and the torque sensor 20.
  • the rotation limiting mechanism 24 includes a housing 50 that constitutes an outline of the rotation limiting mechanism 24, a first connection shaft 60 as a “housing side connection portion”, and a “shaft side”.
  • a second connecting shaft 70 as a “connecting portion” and a wire 80 as a “connecting member” are included.
  • the housing 50 is formed in a substantially cylindrical shape, is disposed coaxially with the steering shaft 14, and covers the steering shaft 14 from the outside in the radial direction.
  • the housing 50 constitutes a part of the steering housing 12 ⁇ / b> A that constitutes the outline of the steering device 12.
  • the housing 50 is integrally formed with a fixing portion 52 for fixing a first connecting shaft 60 to be described later, and the fixing portion 52 is formed in a substantially cylindrical shape protruding outward in the radial direction of the housing 50.
  • a concave counterbore 52A opened to the inside in the radial direction of the housing 50 is formed in the opening on the proximal end side of the fixed portion 52.
  • the counterbore part 52 ⁇ / b> A has a substantially circular cross section, and the bottom surface of the counterbore part 52 ⁇ / b> A is disposed along a plane orthogonal to the axial direction of the fixed part 52.
  • the first connecting shaft 60 is formed in a substantially cylindrical shape with the radial direction of the housing 50 as the axial direction.
  • the first connecting shaft 60 includes a mounting shaft portion 60 ⁇ / b> A that forms a proximal end portion of the first connecting shaft 60, and a connecting shaft portion 60 ⁇ / b> B that forms a distal end side portion of the first connecting shaft 60.
  • the diameter of the connecting shaft 60B is set larger than the diameter of the mounting shaft 60A.
  • a substantially annular flange 60C is formed at the longitudinal intermediate portion of the first connecting shaft 60, and the flange 60C protrudes radially outward with respect to the outer peripheral portion of the connecting shaft portion 60B.
  • the mounting shaft portion 60 ⁇ / b> A of the first connecting shaft 60 is fitted into the hole 52 ⁇ / b> B of the fixing portion 52 of the housing 50 from the inside in the radial direction, and the first connecting shaft 60 is fixed to the housing 50.
  • the first connecting shaft 60 is disposed in a state of being spaced radially outward of the steering shaft 14, and there is a gap G ⁇ b> 1 between the front end surface of the first connecting shaft 60 and the outer peripheral surface of the steering shaft 14. (See FIG. 1B).
  • the flange 60C of the first connecting shaft 60 is disposed in the counterbore 52A of the housing 50, and the base end side surface of the flange 60C is the counterbore portion. It is in contact with the bottom surface of 52A. Thereby, in the radial direction of the housing 50, the first connecting shaft 60 is fixed to the housing 50 in a positioned state.
  • a wire insertion hole 62 as a circular “first insertion hole” is formed in the connection shaft portion 60B of the first connection shaft 60, and the wire insertion hole 62 is formed in the radial direction of the connection shaft portion 60B (see FIG. Specifically, it penetrates in the axial direction of the housing 50.
  • Chamfered portions 62A and 62B are formed at openings on both sides in the axial direction of the wire insertion hole 62.
  • the chamfered portions 62A and 62B are formed in the wire insertion hole 62 in a longitudinal sectional view of the first connecting shaft 60.
  • the wire insertion hole 62 is inclined outward in the radial direction. That is, the chamfered portions 62A and 62B are formed of inclined surfaces and are formed in a substantially conical shape that spreads toward the opening side of the wire insertion hole 62.
  • the second connecting shaft 70 is formed in a substantially columnar shape with the radial direction of the steering shaft 14 as the axial direction, and the other axial side of the steering shaft 14 with respect to the first connecting shaft 60 (see FIGS. 1 and 3). (Arrow B direction side). Although not shown, the proximal end portion of the second connecting shaft 70 is fitted into a hole formed in the steering shaft 14, and the distal end portion of the second connecting shaft 70 is radial with respect to the steering shaft 14. The second connecting shaft 70 is fixed to the steering shaft 14 in a state of protruding outward.
  • a gap G2 (see FIG. 1B) is formed between the distal end surface of the second connecting shaft 70 and the inner peripheral surface of the housing 50, and the gap G1 and the gap in the radial direction of the steering shaft 14 are formed.
  • the dimension of G2 is set to the same dimension.
  • the positions of the first connecting shaft 60 and the second connecting shaft 70 in the circumferential direction of the steering shaft 14 are set to coincide with each other. Yes.
  • the first connecting shaft 60 and the second connecting shaft 70 are disposed so as to overlap (overlap) when viewed from the axial direction of the steering shaft 14.
  • the maximum steering angle of the steering wheel 16 is set to 360 °, even when the steering wheel 16 is steered to the maximum steering position, the circumference of the steering shaft 14 is increased.
  • the positions of the first connecting shaft 60 and the second connecting shaft 70 in the direction are set to coincide with each other.
  • the distal end portion of the second connecting shaft 70 is a connecting shaft portion 70A.
  • a wire insertion hole 72 as a circular “second insertion hole” is formed in the connecting shaft portion 70 ⁇ / b> A in a radial direction, and the wire insertion hole 72 is formed at the neutral position of the steering wheel 16. 62 and substantially coaxial.
  • the wire insertion hole 72 is configured to be symmetrical with the wire insertion hole 62 of the first connecting shaft 60 in the axial direction of the steering shaft 14. That is, chamfered portions 72A and 72B are respectively formed in openings on both sides in the axial direction of the wire insertion hole 72, and the chamfered portions 72A and 72B are inserted through the wire in the longitudinal sectional view of the second connecting shaft 70.
  • the wire 72 is inclined outward in the radial direction as it goes to both sides in the axial direction. That is, the chamfered portions 72 ⁇ / b> A and 72 ⁇ / b> B are configured by inclined surfaces and are formed in a substantially conical shape that spreads toward the opening side of the wire insertion hole 72.
  • the wire 80 is composed of a plurality of metal wires, and is formed in a substantially long string shape (rope shape) having flexibility.
  • the wire 80 has a substantially circular cross section, and the diameter of the wire 80 is slightly smaller than the inner diameter of the wire insertion hole 62 of the first connection shaft 60 and the wire insertion hole 72 of the second connection shaft 70. Is set to a small value. Further, the diameter of the wire 80 is set larger than the dimensions of the gap G1 and the gap G2 in the radial direction of the steering shaft 14.
  • stoppers 82A and 82B are provided at both ends in the longitudinal direction of the wire 80.
  • the stoppers 82A and 82B are larger than the diameter of the wire 80. It is formed in a substantially spherical shape (ball shape) and is fixed to the wire 80.
  • holes are formed so as to penetrate in the longitudinal direction of the wire 80, and the stoppers 82A and 82A, with both longitudinal ends of the wire 80 being inserted through the holes.
  • 82B is fixed to the wire 80 by caulking, welding, or the like.
  • a portion on one side in the longitudinal direction of the wire 80 is inserted through the wire insertion hole 62 of the first connecting shaft 60, and the wire 80 is connected to the second connecting shaft 70 side from the chamfered portion 62 ⁇ / b> B of the first connecting shaft 60. It is extended to.
  • the portion on the other side in the longitudinal direction of the wire 80 is inserted through the wire insertion hole 72 of the second connecting shaft 70, and the wire 80 is connected to the first connecting shaft 60 side from the chamfered portion 72 ⁇ / b> B of the second connecting shaft 70. It is extended to.
  • the stopper 82A is configured to be fitted into the chamfered portion 62A of the wire insertion hole 62, and the stopper 82B is configured to be fitted into the chamfered portion 72A of the wire insertion hole 72.
  • the first connecting shaft 60 (housing 50) and the second connecting shaft 70 (steering shaft 14) are connected by the wire 80.
  • the length of the wire 80 in the longitudinal direction is such that the wire 80 is in a slack state between the first connection shaft 60 and the second connection shaft 70. Is set (see FIG. 3).
  • the wire 80 is spirally wound around the outer peripheral surface of the steering shaft 14. (See FIG. 1).
  • the length of the wire 80 in the longitudinal direction is such that the wire 80 is in an extended state (a state in which the wire 80 is tensioned in the longitudinal direction by applying a tensile force to the outside in the longitudinal direction). Is set.
  • the inclination angle ⁇ of the wire 80 with respect to the axis 14L of the steering shaft 14 is 30 ° to 30 ° when viewed from the radially outer side of the steering shaft 14.
  • the distance between the first connecting shaft 60 and the second connecting shaft 70 in the axial direction of the steering shaft 14 and the length in the longitudinal direction of the wire 80 are set so as to be 60 °.
  • the steering shaft 14 rotates around its own axis on one side (or the other side in the rotation direction). ).
  • the second connecting shaft 70 fixed to the steering shaft 14 rotates relative to the first connecting shaft 60 fixed to the housing 50 in the circumferential direction of the steering shaft 14.
  • the stopper 82B (that is, the other end portion in the longitudinal direction) of the wire 80 is relatively rotated around the axis of the steering shaft 14 with respect to the stopper 82A (that is, one end portion in the longitudinal direction) of the wire 80, and the wire 80 is steered. It acts to wind around the outer periphery of the shaft 14.
  • the steering shaft 14 acts to wind the wire 80 in a spiral shape.
  • the stopper 82A is fitted into the chamfered portion 62A of the first connecting shaft 60, and the stopper 82B is second.
  • the wire 80 is spirally wound around the outer peripheral portion of the steering shaft 14 in a state where the wire 80 is engaged with the chamfered portion 72A of the connecting shaft 70.
  • the steering shaft 14 and the housing 50 are connected by a flexible wire 80 to limit the rotation of the steering shaft 14 at the maximum steering position.
  • the rotation of the steering shaft 14 at the maximum steering position is limited by adding the first connecting shaft 60, the second connecting shaft 70, and the wire 80 of the rotation limiting mechanism 24 to the existing steering device. Can do.
  • the rotation of the steering wheel 16 at the maximum steering position can be limited with a simple configuration.
  • the maximum steering angle of the steering wheel 16 can be easily set by appropriately adjusting the length of the wire 80 in the longitudinal direction.
  • first connecting shaft 60 and the second connecting shaft 70 are arranged apart from each other in the axial direction of the steering shaft 14, and as described above, At the maximum steering position, the wire 80 is spirally wound around the outer periphery of the steering shaft 14. Therefore, as compared with the configuration in which the wire 80 is wound in layers in the radial direction of the steering shaft 14, the physique of the rotation limiting mechanism 24 in the radial direction of the steering shaft 14 can be reduced in size. Can be downsized.
  • the gap G 1 between the first connecting shaft 60 and the steering shaft 14 in the radial direction of the steering shaft 14 is set to be smaller than the radial dimension of the wire 80.
  • the wire 80 extended from the first connecting shaft 60 passes between the first connecting shaft 60 and the steering shaft 14 and gets over the first connecting shaft 60. Arrangement on one side in the axial direction can be suppressed.
  • the dimension of the gap G ⁇ b> 2 between the second connecting shaft 70 and the housing 50 in the radial direction of the steering shaft 14 is set to be smaller than the radial dimension of the wire 80.
  • the wire 80 extended from the second connection shaft 70 passes between the second connection shaft 70 and the housing 50 (overrides), and the axis of the steering shaft 14 with respect to the second connection shaft 70. Arrangement on the other side of the direction can be suppressed. Therefore, when the steering shaft 14 is rotated, the wire 80 can be wound well around the steering shaft 14 and the tangling of the wire 80 can be suppressed.
  • a chamfered portion 62B is formed in the opening portion of the wire insertion hole 62 of the first connecting shaft 60
  • a chamfered portion 72B is formed in the opening portion of the wire insertion hole 72 of the second connecting shaft 70.
  • the chamfered portion 62B (chamfered portion 72B) is configured by an inclined surface that is inclined so as to widen toward the opening side of the wire insertion hole 62 (wire insertion hole 72). For this reason, the durability of the wire 80 can be improved as compared with the case where the chamfered portion 62B is omitted from the first connecting shaft 60 and the case where the chamfered portion 72B is omitted from the second connecting shaft 70.
  • the wire 80 is spirally wound around the steering shaft 14. For this reason, the wire 80 is inclined (specifically, the steering shaft 14) from the first connection shaft 60 (second connection shaft 70) as viewed from the axial direction of the first connection shaft 60 (second connection shaft 70). As it goes to the other side in the axial direction (one side in the axial direction), it extends to the radially outer side of the steering shaft 14. That is, the wire 80 is bent starting from the opening of the wire insertion hole 62 (wire insertion hole 72) of the first connection shaft 60 (second connection shaft 70).
  • the wire 80 is seen from the axial direction of the first connection shaft 60 (second connection shaft 70).
  • the shaft 60 is repeatedly bent to both sides in the radial direction with respect to the axis 14L of the steering shaft 14.
  • the opening end of the wire insertion hole 62 (wire insertion hole 72) Is configured as a right angle corner.
  • the wire 80 may be bent by the corner
  • the bent portion of the wire 80 may be worn, and the durability of the wire 80 may be reduced.
  • a chamfer 62B (chamfer 72B) is formed on the first connecting shaft 60 (second connecting shaft 70), and the chamfer 62B (chamfer 72B).
  • the wire 80 is connected to the wire insertion hole 62 (wire insertion hole). 72), it is possible to suppress excessive chamfering by the chamfered portion 62B (chamfered portion 72B). Thereby, wear of the wire 80 can be suppressed and durability of the wire 80 can be improved.
  • a variation of the rotation limiting mechanism 24 of the first embodiment will be described.
  • a plurality of rotation limiting mechanisms 24 are provided (two in the example of the variation 1 shown in FIG. 4A). Yes.
  • a plurality of rotation limiting mechanisms 24 are arranged at predetermined intervals in the circumferential direction of the steering shaft 14. That is, the housing 50 is provided with two first connection shafts 60, and the first connection shafts 60 are arranged 180 degrees apart in the circumferential direction of the housing 50.
  • the steering shaft 14 is provided with two second connecting shafts 70, and the second connecting shafts 70 are arranged 180 degrees apart in the circumferential direction of the steering shaft 14.
  • the first connecting shaft 60 and the second connecting shaft 70 that overlap in the axial direction of the steering shaft 14 form a pair at the neutral position of the steering wheel 16, and the first connecting shaft 60 and the second connecting shaft 70 that form the pair are wires. 80 are connected.
  • the two wires 80 are wound around the steering shaft 14 in an extended state, and the steering shaft 14 is rotated by the wires 80. Limited.
  • the tensile force acting on the wire 80 when restricting the rotation of the steering shaft 14 can be made lower than that in the first embodiment. Thereby, the durability of the wire 80 can be further improved.
  • a plurality of rotation limiting mechanisms 24 are provided in the circumferential direction of the steering shaft 14. For this reason, the durability of the wire 80 can be further improved while suppressing an increase in the size of the rotation limiting mechanism 24 in the axial direction of the steering shaft 14. In other words, the durability of the wire 80 can be further improved while maintaining the size of the rotation limiting mechanism 24 in the radial direction of the steering shaft 14.
  • the load acting on both ends in the longitudinal direction of the wire 80 can be dispersed (lowered), and the first connecting shaft 60 connected to both ends in the longitudinal direction of the wire 80.
  • the load which acts on the 2nd connecting shaft 70 can be made low.
  • the durability of the wire 80 can be further improved.
  • the steering device 100 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 110 in the steering device 12. 6A and 6B, in the rotation limiting mechanism 110, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals. .
  • the first connection shaft 60 is rotatably supported by the housing 50
  • the second connection shaft 70 is rotatably supported by the steering shaft 14. Yes. This will be specifically described below.
  • the axial length of the fixing portion 52 of the housing 50 is set longer than that in the first embodiment.
  • a concave tip counterbore portion 52C that is open to the tip end side of the fixing portion 52 is formed at a substantially central portion of the tip end portion of the fixing portion 52.
  • the tip counterbore portion 52C is formed from the tip end side of the fixing portion 52. It is formed in a substantially circular shape having a pair of step surfaces 52D (see arrow a in FIG. 6A).
  • the axially one side portion and the axially other side portion of the housing 50 at the tip counterbore portion 52C are each formed in a substantially semicircular shape, and one axial direction of the housing 50 at the tip counterbore portion 52C is formed.
  • the diameter dimension of the portion on the side is larger than the diameter dimension of the portion on the other side in the axial direction of the housing 50 (arrow B direction side in FIG. 6A) in the tip counterbore 52C. Is also set larger.
  • a pair of stepped surfaces 52D are formed on the inner peripheral surface of the tip counterbore 52C, and the pair of stepped surfaces 52D are disposed along a surface orthogonal to the axial direction of the housing 50.
  • the outer diameter dimension of the mounting shaft portion 60A in the first connecting shaft 60 is set slightly smaller than the inner diameter size of the hole portion 52B of the fixed portion 52, and the first connecting shaft 60 is located in the hole portion 52B. It is inserted so that it can rotate.
  • the mounting shaft portion 60A of the first connecting shaft 60 extends to the proximal end side (the radially outer side of the housing 50) of the first connecting shaft 60 as compared to the first embodiment.
  • the base end slightly protrudes from the bottom surface of the tip counterbore part 52 ⁇ / b> C of the fixing part 52 to the radially outer side of the housing 50.
  • a concave fixing hole 60 ⁇ / b> D that is open to the base end side of the first connection shaft 60 is formed in the shaft center portion at the base end portion of the first connection shaft 60.
  • a first retaining member 64 is provided in the tip counterbore portion 52 ⁇ / b> C of the fixing portion 52 in the housing 50, and the first retaining member 64 has a substantially disk shape larger in diameter than the first connecting shaft 60. Is formed.
  • a shaft portion 64A that protrudes toward the first connecting shaft 60 is integrally formed at a substantially central portion of the first retaining member 64.
  • the shaft portion 64A is formed in the fixing hole 60D of the first connecting shaft 60. It is inserted.
  • the first retaining member 64 is fixed to the first connecting shaft 60, and the first retaining member 64 is brought into contact with the bottom surface of the tip counterbore 52C, whereby the first connecting shaft 60 moves toward the distal end side. Is limited.
  • the first connecting shaft 60 is pivotally supported by the housing 50 so that the radial direction of the housing 50 is the axial direction (see the arrow in FIG. 6A).
  • a first protrusion 64B is integrally formed on the outer periphery of the first retaining member 64, and the first protrusion 64B is formed on the radially outer side of the first retaining member 64 (specifically, the shaft of the housing 50). Projecting in one direction).
  • the first protrusion 64B is configured to be able to contact a pair of stepped surfaces 52D of the tip counterbore part 52C.
  • the first protrusion 64B contacts the stepped surface 52D, so that the first connecting shaft 60 can rotate.
  • the rotation is limited to one side in the movement direction or the other side in the rotation direction.
  • the permissible range of rotation of the first connecting shaft 60 toward one side of the rotation direction or the other side of the rotation direction is set to approximately 90 °.
  • the steering shaft 14 is formed with a circular support hole 15 for rotatably supporting the second connecting shaft 70 in the radial direction of the steering shaft 14. Yes.
  • a first counterbore portion 15A and a second counterbore portion 15B that are open to the outside in the radial direction of the steering shaft 14 and have a larger diameter than the support hole 15 are formed in the openings on both axial sides of the support hole 15.
  • the bottom surfaces of the first counterbore part 15 ⁇ / b> A and the second counterbore part 15 ⁇ / b> B are arranged along a direction orthogonal to the axial direction of the support hole 15.
  • the second counterbore part 15B has the same shape as the tip counterbore part 52C of the housing 50. That is, the axially one side part and the axially other side part of the housing 50 in the second counterbore part 15B are each formed in a substantially semicircular shape, and the axially one side of the housing 50 in the second counterbore part 15B.
  • the diameter dimension of the portion (arrow A direction side in FIG. 6B) is larger than the diameter dimension of the second counterbore portion 15B on the other axial side of the housing 50 (arrow B direction side in FIG. 6B). Is also set larger.
  • a pair of stepped surfaces 15C is formed on the outer peripheral surface of the second counterbore portion 15B, and the pair of stepped surfaces 15C extends in the axial direction of the steering shaft 14. It arrange
  • the second connecting shaft 70 includes a connecting shaft portion 70 ⁇ / b> A that constitutes a distal end portion of the second connecting shaft 70, and a substantially columnar main body shaft portion that extends from the connecting shaft portion 70 ⁇ / b> A to the proximal end side of the second connecting shaft 70. 70B, and the outer diameter of the main body shaft portion 70B is set smaller than the outer diameter of the connecting shaft portion 70A.
  • the main-body shaft part 70B of the 2nd connection shaft 70 is inserted in the support hole 15, and the 2nd connection shaft 70 is rotatably supported by the steering shaft 14 (refer the arrow of FIG. 6 (B)). ).
  • a part of the connecting shaft portion 70A is disposed on the first counterbore portion 15A, and the base end of the main body shaft portion 70B slightly protrudes into the second counterbore portion 15B. It is arranged in the state. Furthermore, a concave fixing hole 70 ⁇ / b> C opened to the base end side of the second connecting shaft 70 is formed in the shaft center portion at the base end portion of the main body shaft portion 70 ⁇ / b> B.
  • a second retaining member 74 is provided in the second counterbore portion 15B of the steering shaft 14, and the second retaining member 74 is formed in a substantially disc shape having a larger diameter than the main body shaft portion 70B.
  • a shaft portion 74A that protrudes toward the second connecting shaft 70 is integrally formed at a substantially central portion of the second retaining member 74, and the shaft portion 74A is formed in the fixing hole 70C of the second connecting shaft 70.
  • the second retaining member 74 is fixed to the second connecting shaft 70 by being inserted. As a result, the second retaining member 74 is brought into contact with the bottom surface of the second counterbore portion 15B, and the movement of the second connecting shaft 70 toward the distal end side is restricted.
  • the second connecting shaft 70 is pivotally supported by the housing 50 with the radial direction of the steering shaft 14 as the axial direction.
  • a second protrusion 74B is integrally formed on the outer periphery of the second retaining member 74, and the second protrusion 74B is formed on the radially outer side of the second retaining member 74 (specifically, the steering shaft 14). It protrudes in one axial direction.
  • the second protrusions 74B are configured to be able to contact the pair of stepped surfaces 15C of the second counterbore part 15B, and the second protrusions 74B are in contact with the stepped surfaces 15C.
  • the rotation is limited to one side of the rotation direction or the other side of the rotation direction.
  • the permissible range of rotation of the second connecting shaft 70 toward one side of the rotation direction or the other side of the rotation direction is set to approximately 90 °.
  • the stopper 82A is chamfered 62A of the first connecting shaft 60.
  • the stopper 82B is fitted to the chamfered portion 72A of the second connecting shaft 70, and the wire 80 is spirally wound around the outer peripheral portion of the steering shaft 14 in an extended state.
  • the first connecting shaft 60 is rotatably supported by the housing 50, and the second connecting shaft 70 is rotatably supported by the steering shaft 14.
  • the first connecting shaft 60 (second connecting shaft 70) follows the extending direction of the wire 80 from the first connecting shaft 60 (second connecting shaft 70). Rotate around its own axis.
  • the bending of the wire 80 when the steering wheel 16 reaches the maximum steering position can be further suppressed, and the wire 80 can be chamfered 62B (chamfered) of the wire insertion hole 62 (wire insertion hole 72). It is possible to further suppress excessive squeezing by the portion 72B). Thereby, the wear of the wire 80 can be further suppressed, and the durability of the wire 80 can be further improved.
  • a first retaining member 64 is fixed to the first connecting shaft 60, and the first protrusion 64 ⁇ / b> B of the first retaining member 64 can be brought into contact with a step surface 52 ⁇ / b> D of the fixing portion 52 in the housing 50.
  • a second retaining member 74 is fixed to the second connecting shaft 70, and the second protrusion 74B of the second retaining member 74 can come into contact with the step surface 15C of the second counterbore portion 15B of the steering shaft 14. It is configured. Thereby, the rotation range of the first connecting shaft 60 (second connecting shaft 70) is limited by the step surface 52D (step surface 15C).
  • first connecting shaft 60 and the second connecting shaft 70 are configured to be rotatable about their own axes.
  • one of the first connecting shaft 60 and the second connecting shaft 70 may be configured to be rotatable about its own axis.
  • the second connecting shaft 70 may be configured to be rotatably supported by the steering shaft 14, and one end in the longitudinal direction of the wire 80 may be connected to the housing 50 as follows.
  • the fixing portion 52 and the first connecting shaft 60 are omitted from the housing 50, and a wire insertion hole 50 ⁇ / b> A as an “insertion hole” is formed in the housing 50.
  • the wire 80 is inserted into the hole 50A.
  • the stopper 82 ⁇ / b> A of the wire 80 is fixed to the peripheral portion of the wire insertion hole 50 ⁇ / b> A in the outer peripheral portion of the housing 50 by welding or the like.
  • the stopper 82 ⁇ / b> A can be arranged to be spaced radially outward with respect to the steering shaft 14. Thereby, at the maximum steering position of the steering wheel 16, excessive bending of the wire 80 extending from the stopper 82A can be suppressed. Accordingly, even in this case, the durability of the wire 80 can be improved.
  • a chamfered portion 50B similar to the chamfered portion 62B of the first connecting shaft 60 is formed in the opening on the inner peripheral surface side of the housing 50 in the wire insertion hole 50A.
  • the opening on the inner peripheral surface side of the housing 50 in the wire insertion hole 50 ⁇ / b> A may be configured by an inclined surface that is inclined outward in the radial direction of the wire insertion hole 50 ⁇ / b> A as it goes inward in the radial direction of the housing 50.
  • the first connecting shaft 60 and the second connecting shaft 70 are configured to be rotatable around their own axes to suppress the bending of the wire 80.
  • the bending of the wire 80 is suppressed.
  • the structure which suppresses is not restricted to this.
  • the connection structure of the wire 80, the housing 50, and the steering shaft 14 may be connected by a so-called ball joint.
  • this structure will be described using the connection between the wire 80 and the steering shaft 14.
  • the steering shaft 14 is formed with a connecting recess 14A that is opened radially outward of the steering shaft 14, and the connecting recess 14A has a smaller diameter than the stopper 82B.
  • the cross section is formed in a circular shape.
  • a substantially cylindrical boss 14 ⁇ / b> B is provided in the radial direction of the steering shaft 14 at a position on the other axial side with respect to the connecting recess 14 ⁇ / b> A (arrow B direction in FIG. 7B). Stands outward.
  • a concave threaded portion 14B1 that is opened to the radially outer side of the steering shaft 14 is formed at the tip of the boss 14B.
  • the boss 14B may be provided integrally with the steering shaft 14, or may be configured separately from the steering shaft 14 and fixed to the steering shaft 14.
  • a connecting plate 76 having a substantially rectangular plate shape is provided on the tip side of the boss 14B, and the connecting plate 76 faces the boss 14B and the connecting recess 14A with the radial direction of the steering shaft 14 as the plate thickness direction.
  • An attachment hole 76A is formed through the connection plate 76, and the attachment hole 76A is disposed coaxially with the screw portion 14B1 of the boss 14B.
  • the fixing bolt B1 is inserted into the mounting hole 76A, and the fixing bolt B1 is screwed into the screw portion 14B1, whereby the connecting plate 76 is fixed to the boss 14B (that is, the steering shaft 14).
  • a substantially circular connecting hole 76B is formed through the portion of the connecting plate 76 that faces the connecting recess 14A, and the connecting hole 76B is set to have a smaller diameter than the stopper 82B.
  • the stopper 82B is sandwiched between the steering shaft 14 and the connecting plate 76 in a state where the stopper 82B is fitted in the connecting recess 14A of the steering shaft 14 and the connecting hole 76B of the connecting plate 76.
  • the wire 80 and the steering shaft 14 are connected by the ball joint so that the stopper 82B slides on the opening edge of the connection recess 14A and the connection hole 76B.
  • the stopper 82B follows the direction in which the wire 80 is pulled out from the stopper 82B, and the stopper 82B slides on the opening edge of the coupling recess 14A and the coupling hole 76B. Rotate around its own center point. For this reason, the rapid bending of the wire 80 extended from the stopper 82B can be further suppressed.
  • the steering device 200 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 210 in the steering device 12. 8A and 8B, in the rotation limiting mechanism 210, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals. .
  • the chamfered portion 62A is omitted from the first connecting shaft 60.
  • the wire 80 is provided with a compression coil spring 212 as an “urging member”.
  • the compression coil spring 212 is provided between the stopper 82A and the first connection shaft 60 (the connection shaft portion 60B). Is arranged. Accordingly, the stopper 82A is separated from the first connecting shaft 60 by the urging force of the compression coil spring 212 (specifically, one side in the axial direction of the housing 50, and the direction in the direction of arrow A in FIG. 8A). ).
  • the housing 50 is integrally formed with a holding wall 50C as a “holding portion” at a position on one side in the axial direction of the housing 50 with respect to the stopper 82A (arrow A direction side in FIG. 8).
  • the wall 50C protrudes radially inward from the housing 50 with the axial direction of the housing 50 as the plate thickness direction.
  • the compression coil spring 212 presses the stopper 82A in a state where the compression coil spring 212 is slightly compressed and deformed from the natural state, and the stopper 82A contacts the holding wall 50C. It is touched.
  • the length of the wire 80 in the longitudinal direction is equal to the contact length of the compression coil spring 212 (compression deformation of the compression coil spring 212 is completed as compared with the first embodiment. , The length of the state in which the coils are in close contact with each other).
  • the wire 80 when the steering wheel 16 is rotated from the neutral position to one side or the other side by the driver, the wire 80 is connected to the steering shaft as in the first embodiment. 14 is wound around.
  • the wire 80 When the steering wheel 16 reaches the position before the maximum steering position, the wire 80 is extended, and the biasing force of the compression coil spring 212 is applied to the steering shaft via the wire 80 including the stoppers 82A and 82B. 14 (second connecting shaft 70).
  • the steering shaft 14 resists the urging force of the compression coil spring 212 and the wire 80 ( The stopper 82B) is pulled to the other side in the longitudinal direction (the arrow B direction side in FIG. 8A).
  • the stopper 82A is separated from the holding wall 50C to the other axial side of the housing 50, and the wire 80 is further wound around the steering shaft 14.
  • the compression deformation of the compression coil spring 212 is completed, and the movement of the stopper 82A toward the other side in the axial direction of the housing 50 is the first.
  • Limited by one connecting shaft 60 and compression coil spring 212 Thereby, rotation of the steering shaft 14 (steering wheel 16) is restricted. Therefore, also in the third embodiment, the same operations and effects as those in the first embodiment can be achieved.
  • the steering wheel 16 when the steering wheel 16 is rotated from the front of the maximum steering position to the maximum steering position, the steering wheel 16 is moved against the urging force of the compression coil spring 212. It is necessary to rotate. For this reason, the steering force from the front position to the maximum steering position in the steering wheel 16 can be increased. Accordingly, the driver can be made aware of the arrival of the steering wheel 16 at the maximum steering position (that is, the maximum steering angle of the steering wheel 16). Therefore, the operability and convenience for the driver can be improved.
  • the holding wall 50C is formed in the housing 50, and the stopper 82A biased in the direction away from the first connecting shaft 60 by the compression coil spring 212 is provided with the holding wall. Held by 50C. For this reason, even if the compression coil spring 212 is provided on the wire 80, relative displacement of the compression coil spring 212 and the stopper 82A with respect to the housing 50 can be suppressed. Thereby, for example, it is possible to suppress the generation of abnormal noise that occurs between the compression coil spring 212 and the first connecting shaft 60 or between the stopper 82 ⁇ / b> A and the housing 50.
  • the compression coil spring 212 is attached to the end portion on one side in the longitudinal direction of the wire 80 and is disposed between the first connecting shaft 60 and the stopper 82A. That is, the compression coil spring 212 is provided at one end in the longitudinal direction of the wire 80 on the fixed side. Thereby, the holding
  • the compression coil spring 212 when the compression coil spring 212 is provided at the end of the wire 80 on the other side in the longitudinal direction and the holding wall 50C is provided on the steering shaft 14, the holding wall 50C and the steering shaft 14 steer the steering wheel 16. To rotate (movable). For this reason, the stopper 82B may be displaced with respect to the holding wall 50C, and the stability of the holding state of the stopper 82B may be reduced.
  • the compression coil spring 212 is provided at the end portion on the one side in the longitudinal direction of the wire 80 on the fixed side, and the holding wall 50C is provided on the housing 50.
  • the holding wall 50C does not rotate together with the steering shaft 14 when the steering shaft 14 rotates, the influence on the holding state of the stopper 82A due to the rotation of the steering shaft 14 can be suppressed. Therefore, the holding state with respect to the stopper 82A when the steering wheel 16 is rotated can be stabilized.
  • the compression coil spring 212 attached to the wire 80 is disposed between the first connecting shaft 60 and the stopper 82A.
  • the compression coil spring 212 may be arranged between the second connecting shaft 70 and the stopper 82B.
  • the wire 80 is provided with a single compression coil spring, but the wire 80 may be provided with a plurality of compression coil springs.
  • a compression coil spring may be provided between the first connecting shaft 60 and the stopper 82A and between the second connecting shaft 70 and the stopper 82B.
  • the steering shaft 14 may also be provided with a holding wall 50C.
  • a plurality of compression coil springs may be arranged in the axial direction of the housing 50 between the first connecting shaft 60 and the stopper 82A. Thereby, compared with 3rd Embodiment, the spring load of a compression coil spring can be set low, for example.
  • the stoppers 82A and 82B can be held by the holding wall 50C. Accordingly, the holding state of the stoppers 82A and 82B can be stabilized before the wire 80 is extended. As a result, it is possible to suppress noise generated by the stoppers 82A and 82B coming into contact with the housing 50 or the steering shaft 14.
  • the spring loads of the plurality of springs may be set to different loads.
  • the steering force applied before the maximum steering position of the steering wheel 16 can be increased in multiple stages.
  • the operability and convenience for the driver can be further improved.
  • the compression coil spring 212 used in the third embodiment may be applied to the rotation restricting mechanism 110 of the second embodiment.
  • the holding wall 50 ⁇ / b> C may be provided on the first connecting shaft 60.
  • the urging member that urges the stopper 82A in the direction of separating from the first connecting shaft 60 is constituted by a compression coil spring.
  • the urging member that urges the stopper 82A The form is not limited to this.
  • the urging member may be constituted by a tension coil spring or a leaf spring.
  • the holding wall 50C is arranged on one side in the axial direction of the housing 50 as compared with the third embodiment.
  • a tension coil spring is disposed between the stopper 82A and the holding wall 50C, one end of the tension coil spring is locked to the holding wall 50C, and the other end of the tension coil spring is locked to the stopper 82A.
  • You may comprise.
  • a hole may be formed in the housing 50 at a position corresponding to the tension coil spring so that the tension coil spring can be assembled from the outside in the radial direction of the housing 50.
  • the holding wall 50C of the housing 50 is provided with The configuration may be omitted.
  • the stopper 82A is in direct contact with the holding wall 50C.
  • the holding wall 50C may be covered with an elastic cover or the like.
  • the holding wall 50 ⁇ / b> C may be configured separately from the housing 50 and may be formed of an elastic material and fixed to the housing 50.
  • FIGS. 9 to 11 a steering apparatus 300 according to the fourth embodiment will be described with reference to FIGS. 9 to 11.
  • the steering device 300 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 310 in the steering device 12. 9 to 11, in the rotation limiting mechanism 310, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals.
  • the rotation limiting mechanism 310 has a variable mechanism 312.
  • the variable mechanism 312 moves the stopper 82A of the wire 80 in the axial direction of the housing 50 so that the winding length of the wire 80 wound around the steering shaft 14 is variable. This will be specifically described below.
  • the stopper 82A is provided at one end portion in the longitudinal direction of the wire 80, whereas in the fourth embodiment, the stopper 82A is fixed to a portion on one end side in the longitudinal direction of the wire 80.
  • one end in the longitudinal direction of the wire 80 extends to one side in the axial direction of the housing 50 with respect to the stopper 82A.
  • the length between the stopper 82A and the stopper 82B in the wire 80 is set to the same length as that in the first embodiment. That is, in the fourth embodiment, the length in the longitudinal direction of the wire 80 is set to be longer than that in the first embodiment.
  • an annular attachment ring portion 84 is formed at one end portion of the wire 80 in the longitudinal direction.
  • the variable mechanism 312 includes a slider 320, a motor 330 as a “drive unit”, and a pinion 340 fixed to the rotation shaft 330 ⁇ / b> B of the motor 330.
  • the slider 320 is formed in a substantially cylindrical shape, and is between the steering shaft 14 and the housing 50 on one side in the axial direction with respect to the first connecting shaft 60 (the direction of the arrow A in FIGS. 9 to 11) and the housing 50. And are arranged on the same axis.
  • a key groove (not shown) is formed in the outer peripheral portion of the slider 320.
  • the key groove is formed in a groove shape opened to the outside in the radial direction of the slider 320 and extends in the axial direction of the slider 320. ing.
  • the slider 320 is connected to the housing 50 so as not to be relatively rotatable, and is supported so as to be relatively movable (slidable) with respect to the housing 50 in the axial direction.
  • the fitting between the slider 320 and the housing 50 may be configured as a so-called spline fitting. That is, an uneven portion may be formed on the outer peripheral portion of the slider 320, and an uneven portion corresponding to the outer peripheral portion of the slider 320 may be formed on the inner peripheral portion of the housing 50.
  • a rack portion 322 extending in the axial direction of the slider 320 is integrally formed on a part of the outer peripheral portion of the slider 320.
  • the rack portion 322 has a plurality of rack teeth 322 ⁇ / b> A, and the rack teeth 322 ⁇ / b> A are arranged in the axial direction of the slider 320.
  • the housing 50 is formed with a substantially rectangular hole 50D penetratingly formed at one side in the axial direction of the fixed portion 52 and corresponding to the rack portion 322. The hole 50D is exposed to the outside in the radial direction of the housing 50.
  • a connecting pin P is fixed to the inner peripheral portion of the slider 320 at the end on the first connecting shaft 60 side, and the mounting ring portion 84 of the wire 80 described above is connected to the slider 320 by the connecting pin P.
  • the length between the 1st connection shaft 60 and the 2nd connection shaft 70 in the wire 80 becomes variable because the slider 320 slides to an axial direction.
  • the motor 330 includes a substantially cylindrical motor main body 330A and a rotary shaft 330B extending from one axial end of the motor main body 330A. As shown in FIG. 10, the motor main body 330 ⁇ / b> A is arranged on the outer side in the radial direction of the housing 50, and in a direction orthogonal to the axial direction of the housing 50 when viewed from the distal end side of the fixing portion 52 of the housing 50. Are arranged along.
  • the motor body 330A is fixed to a fixed boss 50E formed on the housing 50 by a fixing bolt B2.
  • the rotation shaft 330 ⁇ / b> B extends from the motor main body 330 ⁇ / b> A toward the housing 50, and is disposed on the outer side in the radial direction of the slider 320 with respect to the rack portion 322 of the slider 320.
  • the motor 330 is electrically connected to the control unit 40 and is configured to be driven by the control of the control unit 40.
  • the pinion 340 is formed in a substantially cylindrical shape, and is fixed to the rotating shaft 330 ⁇ / b> B of the motor 330 and is disposed in the hole 50 ⁇ / b> D of the housing 50.
  • a plurality of pinion teeth 340 ⁇ / b> A are formed on the outer periphery of the pinion 340, and the pinion teeth 340 ⁇ / b> A mesh with the rack teeth 322 ⁇ / b> A of the rack portion 322.
  • 9 and 10 is the initial state of the variable mechanism 312.
  • the steering wheel 16 is disposed at the neutral position, and the stopper 82 ⁇ / b> A is disposed away from the first connecting shaft 60 on one side in the axial direction of the housing 50.
  • the position of the slider 320 relative to the housing 50 is set so that the wire 80 is not slack. More specifically, the wire 80 is pulled in the longitudinal direction so that a relatively low tensile force that does not affect the steering of the steering wheel 16 by the driver is generated in the wire 80.
  • control unit 40 drives the motor 330 based on the output signal output from the steering angle sensor 18 so that the slider 320 slides following the rotation of the steering wheel 16 (steering shaft 14). It has become. Specifically, the control unit 40 drives the motor 330 so as to maintain the state in which the wire 80 is not slack in the initial state of the variable mechanism 312.
  • the steering shaft 14 when the steering wheel 16 is turned from the neutral position to one side in the turning direction (or the other side in the turning direction) by the steering of the driver, the steering shaft 14 is moved to its own axis.
  • the wire 80 is wound around the steering shaft 14 by rotating to one side in the rotation direction (or the other side in the rotation direction).
  • the stopper 82 ⁇ / b> A is fitted to the chamfered portion 62 ⁇ / b> A of the first connecting shaft 60, and the rotation of the steering shaft 14 is restricted.
  • the control unit 40 controls the motor 330 to increase the torque of the motor 330, so that an arbitrary position between the neutral position and the maximum steering position of the steering wheel 16 can be obtained.
  • the slide of the slider 320 can be stopped.
  • the winding length of the wire 80 can be made variable.
  • the maximum steering position of the steering wheel 16 can be made variable.
  • control unit 40 detects that the steering of the wheel H is restricted based on the output from the steering sensor 38. Further, by making the winding length of the wire 80 variable, for example, the maximum steering position of the steering wheel 16 corresponding to various vehicles can be easily set.
  • variable mechanism 312 sets the wire 80 so as not to loosen. For this reason, the wire 80 can be spaced apart from the radial outer side of the steering shaft 14. Thereby, the entanglement of the wire 80 can be effectively suppressed. Further, by suppressing the slackness of the wire 80, for example, interference between the wire 80 and the steering shaft 14 can be suppressed at the neutral position of the steering wheel 16. Thereby, generation
  • variable mechanism 312 is connected to one end of the wire 80 in the longitudinal direction. For this reason, it is possible to detect breakage of the wire 80 using the variable mechanism 312. That is, as described above, the state in which the wire 80 is not slack is maintained by the variable mechanism 312 between the neutral position of the steering wheel 16 and the maximum steering position. For this reason, for example, when the control unit 40 detects the motor current of the motor 330 and the motor current is lower than a predetermined value, the extension state of the wire 80 is released (that is, the wire 80 is broken). It may be detected by the control unit 40 (assuming it has occurred).
  • control unit 40 when the control unit 40 drives the motor 330 so as to slide the slider 320 in the initial state to one side in the axial direction, and the slider 320 slides from the position in the initial state to one side in the axial direction, The control unit 40 may detect that the wire 80 is broken. For this reason, the variable mechanism 312 can also function as a safety device. In this case, the vehicle may be provided with a notification device that notifies the breakage of the wire 80, and the notification device may notify that the breakage of the wire 80 has occurred. As described above, fail-safe when the wire 80 is used can be implemented.
  • the slider 320 moves in the axial direction by driving the motor 330.
  • the control unit 40 controls the motor 330 so as to increase the torque of the motor 330, whereby the steering force of the steering wheel 16 can be increased.
  • the driver can be made aware that the steering wheel 16 has reached the maximum steering position.
  • the rack portion 322 is formed integrally with the slider 320, and the pinion 340 engaged with the rack portion 322 is fixed to the rotating shaft 330B of the motor 330.
  • the rack part 322 and the pinion 340 constitute a gear train, and the motor 330 and the slider 320 are connected by the gear train.
  • the winding length of the wire 80 can be made variable with a simple configuration.
  • variable mechanism 312 the pinion 340 fixed to the motor 330 is directly engaged with the rack portion 322 of the slider 320.
  • a speed reduction mechanism that decelerates the rotation of the pinion 340 may be provided between the pinion 340 and the rack portion 322.
  • the control unit 40 increases the torque of the motor 330 to stop the slider 320 from sliding.
  • the configuration for stopping the slide is not limited to this.
  • a lock member configured to be able to mesh with the rack portion 322 of the slider 320 is provided so as to face the rack portion 322, and the lock member is moved by an actuator such as a solenoid electrically connected to the control unit 40. It may be configured to operate. And you may comprise so that the slide of the slider 320 may be stopped by operating an actuator by the control part 40 and meshing
  • variable mechanism 312 includes a winding shaft 350, a worm wheel 354, a worm 356, and a motor 330.
  • the take-up shaft 350 is formed in a substantially cylindrical shape with the radial direction of the steering shaft 14 as the axial direction, and is disposed on one axial side of the housing 50 with respect to the first connecting shaft 60 (not shown). .
  • one end portion of the support shaft 351 is fixed to the shaft center portion of the winding shaft 350 so as to be integrally rotatable, and the other end portion of the support shaft 351 is interposed via a bracket 352 fixed to the housing 50.
  • the housing 50 is rotatably supported.
  • one end in the longitudinal direction of the wire 80 is connected to the winding shaft 350.
  • a pair of flanges 350A are formed at both axial ends of the winding shaft 350, and a portion on one side in the longitudinal direction of the wire 80 is disposed between the pair of flanges 350A.
  • the worm wheel 354 is arranged coaxially with the take-up shaft 350 and is arranged on the outer side in the radial direction of the housing 50 with respect to the take-up shaft 350. Further, the axial center portion of the worm wheel 354 is fixed so as to be integrally rotatable with the support shaft 351, and worm teeth are formed on the outer peripheral portion of the worm wheel 354.
  • the motor 330 is disposed on the outer side in the radial direction of the housing 50, and the rotation shaft 330 ⁇ / b> B of the motor 330 is disposed along a direction orthogonal to the axial direction of the housing 50.
  • a worm 356 is fixed to the rotating shaft 330 ⁇ / b> B of the motor 330.
  • the worm 356 is disposed adjacent to the radially outer side of the worm wheel 354 and meshed with the worm wheel 354.
  • the worm wheel 354 is rotated by the worm 356, and the winding shaft 350 is rotated to one side or the other side around its own axis. That is, the worm 356 and the worm wheel 354 constitute a driving force transmission mechanism 358 that transmits the driving force of the motor 330 to the winding shaft 350.
  • the wire 80 is taken up by the take-up shaft 350, or the wire 80 taken up by the take-up shaft 350 is drawn from the take-up shaft 350. Therefore, also in the modification 1, the winding length of the wire 80 can be made variable.
  • the rotation of the motor 330 is decelerated by the worm 356 and the worm wheel 354, and the winding shaft 350 rotates. For this reason, it is possible to reduce the torque of the motor 330 when the control unit 40 controls the torque of the motor 330 to limit the rotation of the steering shaft 14. Therefore, it is possible to contribute to downsizing of the motor 330.
  • variable mechanism 312 moves one end of the wire 80 in the longitudinal direction to vary the winding length of the wire 80 (that is, the maximum steering angle of the steering wheel 16 is increased). It is configured to be variable).
  • the first connecting shaft 60 is configured to be movable in the axial direction of the steering shaft 14, and the maximum steering position of the steering wheel 16 is configured to be variable. This will be specifically described below.
  • a support housing 360 as a substantially cylindrical “support member” is provided on the outer side in the radial direction of the housing 50 of the rotation limiting mechanism 310.
  • An outer shell of the rotation limiting mechanism 310 is configured.
  • the housing 50 is connected to the support housing 360 so as not to be relatively rotatable, and is supported by the support housing 360 so as to be relatively movable (slidable) in the axial direction of the support housing 360.
  • a key groove (not shown) is formed on the outer peripheral portion of the housing 50, and the key groove is opened to the outside in the radial direction of the housing 50. It is formed in a groove shape and extends in the axial direction of the slider 320.
  • a key (not shown) extending in the axial direction is provided on the inner peripheral portion of the support housing 360, and the key is slidably inserted into the key groove.
  • a rack portion 54 extending in the axial direction of the housing 50 is integrally formed on the outer peripheral portion of the housing 50 at a position on the other side in the axial direction with respect to the fixed portion 52.
  • the rack portion 54 has a plurality of rack teeth 54 ⁇ / b> A, and the rack teeth 54 ⁇ / b> A are arranged in the axial direction of the housing 50.
  • the support housing 360 is formed with a substantially rectangular hole 360A penetratingly formed at a portion radially outside the housing 50 with respect to the rack portion 54, and the pinion 340 of the motor 330 is disposed in the hole 360A.
  • the pinion 340 is meshed with the rack portion 54. That is, the rack portion 54 and the pinion 340 constitute a driving force transmission mechanism 362 that transmits the driving force of the motor 330 to the housing 50.
  • the wire 80 is extended in the longitudinal direction so that the support housing 360 is extended.
  • the position of the housing 50 is set.
  • the control unit 40 (not shown in FIG. 13) drives the motor 330 based on the output signal output from the steering angle sensor 18, and the wire 80 in the initial state is driven.
  • the housing 50 slides to the other side in the axial direction with respect to the support housing 360 so as to maintain the extended state.
  • the distance between the first connecting shaft 60 and the second connecting shaft 70 in the axial direction of the steering shaft 14 can be made variable.
  • the winding length of the wire 80 does not change, but the maximum steering position of the steering wheel 16 can be made variable.
  • the first connecting shaft 60 is configured to be movable in the axial direction of the steering shaft 14, and the maximum steering angle of the steering wheel 16 is made variable.
  • the first connecting shaft 60 is configured to be movable (rotatable) in the circumferential direction of the steering shaft 14, and the maximum steering position of the steering wheel 16 is configured to be variable.
  • a substantially cylindrical support housing 360 is provided on the radially outer side of the housing 50 of the rotation limiting mechanism 310.
  • the support housing 360 constitutes the outline of the rotation limiting mechanism 310.
  • a pair of substantially annular bearings 370 (ball bearings in this modification) are provided between the housing 50 and the support housing 360, and the housing 50 is attached to the support housing 360 via the bearing 370. It is rotatably supported.
  • a gear portion 50F is formed on the outer peripheral portion of the other end portion in the axial direction of the housing 50 (the end portion on the arrow B direction side in FIG. 14), and the gear portion 50F is configured by a plurality of external teeth.
  • the motor 330 is disposed substantially parallel to the steering shaft 14.
  • a substantially cylindrical drive gear 380 is fixed to the rotating shaft 330 ⁇ / b> B of the motor 330, and the diameter of the drive gear 380 is set smaller than that of the housing 50.
  • gear teeth that mesh with external teeth of the gear portion 50 ⁇ / b> F in the housing 50 are formed on the outer peripheral portion of the drive gear 380.
  • the driving force transmission mechanism 382 that transmits the driving force of the motor 330 to the housing 50 is configured by the gear portion 50 ⁇ / b> F and the driving gear 380 of the housing 50.
  • the third modification when the motor 330 is driven by the control of the control unit 40, the first connecting shaft 60 rotates relative to the support housing 360 together with the housing 50. For this reason, the relative position of the first connecting shaft 60 and the second connecting shaft 70 in the circumferential direction of the steering shaft 14 can be made variable. As a result, as in the second modification, the winding length of the wire 80 does not change, but the maximum steering position of the steering wheel 16 can be made variable.
  • the diameter of the housing 50 is set larger than that of the drive gear 380. For this reason, the rotation of the motor 330 is decelerated by the drive gear 380 and the gear portion 50F of the housing 50. In other words, the drive gear 380 and the gear portion 50F of the housing 50 constitute a speed reduction mechanism. For this reason, the torque of the motor 330 when limiting the rotation of the steering shaft 14 can be reduced. Therefore, it is possible to contribute to downsizing of the motor 330.
  • the steering device 400 is configured in the same manner as the variation 3 of the first embodiment except for the rotation limiting mechanism 410 in the steering device 12.
  • the rotation limiting mechanism 410 members that are configured in the same manner as the variation 3 of the first embodiment are denoted by the same reference numerals.
  • the housing 50 is provided with a pair of first connection shafts 60, and the pair of first connection shafts 60 are arranged apart from each other in the axial direction of the housing 50. It arrange
  • the second connection shaft 70 of the steering shaft 14 is disposed between the pair of first connection shafts 60 in the axial direction of the steering shaft 14.
  • the both ends of the wire 80 in the longitudinal direction are coupled to the pair of first coupling shafts 60, and the middle portion in the longitudinal direction of the wire 80 is coupled to the second coupling shaft 70.
  • the outer periphery of the wire 80 is covered with an insulating cover 86 made of an insulating material.
  • one end in the longitudinal direction of the wire 80 is electrically connected to a power source (such as a vehicle battery), and the other end in the longitudinal direction of the wire 80 is grounded.
  • a sensor 412 as a “break detection unit” that detects a voltage is provided at the other longitudinal end of the wire 80, and the sensor 412 is electrically connected to the control unit 40.
  • the sensor 412 is configured to predict or detect the breakage of the wire 80 based on the detected voltage. That is, by connecting one end of the wire 80 in the longitudinal direction to the power source, a current flows in the wire 80, so that the wire 80 itself acts as a resistance. As a result, when the wire 80 is broken (including some breaks), the resistance value of the wire 80 is equivalently increased, and the voltage detected by the sensor 412 is lowered. For this reason, when the voltage value detected by the sensor 412 is lower than the first threshold value, the control unit 40 predicts the breakage of the wire 80, and the voltage value detected by the sensor 412 is lower than the first threshold value. When lower than the lower second threshold, the control unit 40 detects the breakage of the wire 80.
  • the rotation limiting mechanism 410 can function as a safety device as in the fourth embodiment.
  • a notification device 420 as a “notification unit” electrically connected to the control unit 40 is provided in the vehicle so that the notification device 420 notifies the prediction or detection of the breakage of the wire 80. May be.
  • the sensor 412 is connected to the other end in the longitudinal direction of the wire 80.
  • the sensor 412 is connected to the stopper 82B of the wire 80.
  • the sensor 412 may be connected to a proximity portion on one side in the longitudinal direction (on the first connecting shaft 60 side).
  • a communication hole that connects the wire insertion hole 62 and the outside of the first connection shaft 60 is formed in the first connection shaft 60 on the stopper 82B side, and the sensor 412 and the wire 80 are connected in the communication hole. You may arrange the connection line which connects.
  • the steering device 500 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 510 in the steering device 12.
  • the rotation limiting mechanism 510 members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals.
  • the rotation limiting mechanism 510 has a belt 520 as a metal “connecting member” having flexibility instead of the wire 80, and the belt 520 is formed in a long band shape and has a steering shaft.
  • the fourteen axial directions are arranged in the width direction.
  • One end of the belt 520 in the longitudinal direction is provided with a first stopper 522A (which is an element grasped as a “restricting member” in a broad sense), and the first stopper 522A extends in the axial direction of the housing 50. It is formed in a substantially rectangular tube shape with a direction. Then, one end of the belt 520 in the longitudinal direction is inserted into the first stopper 522A, and the first stopper 522A is fixed to the belt 520 by caulking or the like.
  • first stopper 522A is fitted and fixed in a fixing hole 50H formed in the housing 50, and the belt 520 extends from the first stopper 522A to the inside of the housing 50.
  • a flange 522A1 protruding outward from the first stopper 522A is integrally formed at one axial end portion of the first stopper 522A.
  • the flange 522A1 is formed on the outer side in the radial direction of the housing 50 with respect to the fixing hole 50H. It is in contact with the peripheral edge.
  • a second stopper 522B (which is an element grasped as a “restricting member” in a broad sense) is provided at the other longitudinal end of the belt 520, and the second stopper 522B is provided on the steering shaft 14. It is formed in a substantially rectangular tube shape with the axial direction as the longitudinal direction. The other end in the longitudinal direction of the belt 520 is inserted into the second stopper 522B, and the second stopper 522B is fixed to the belt 520 by caulking or the like. Further, the second stopper 522B is fitted and fixed in a fixed recess 14C formed on the outer peripheral portion of the steering shaft 14. Thereby, the steering shaft 14 and the housing 50 are connected by the belt 520.
  • the first stopper 522A is disposed on the radially outer side of the steering shaft 14 with respect to the second stopper 522B. Specifically, at the neutral position of the steering wheel 16, the first stopper 522 ⁇ / b> A and the second stopper 522 ⁇ / b> B are disposed to face each other in the radial direction of the steering shaft 14. That is, both ends in the longitudinal direction of the belt 520 are arranged at positions that coincide with each other in the axial direction of the steering shaft 14.
  • the belt 520 In the neutral position of the steering wheel 16, the belt 520 is disposed in a slack state between the steering shaft 14 and the housing 50.
  • the steering shaft 14 When the steering wheel 16 is turned to one side (or the other side in the turning direction) by the driver, the steering shaft 14 is turned to the one side (or the other side in the turning direction).
  • the belt 520 is wound around the outer periphery of the steering shaft 14 with the radial direction of the steering shaft 14 as the thickness direction.
  • the length of the belt 520 in the longitudinal direction is set so that the belt 520 is extended when the steering wheel 16 reaches the maximum steering position. Thereby, the rotation of the steering shaft 14 is restricted at the maximum steering position of the steering wheel 16. Therefore, also in the sixth embodiment, the rotation of the steering shaft 14 can be mechanically limited by the rotation limiting mechanism 510.
  • the connecting member that connects the steering shaft 14 and the housing 50 is constituted by a belt 520 having a substantially long belt shape.
  • the first stopper 522A is disposed on the radially outer side of the steering shaft 14 with respect to the second stopper 522B. Accordingly, when the belt 520 is wound around the steering shaft 14, the belt 520 is wound around the steering shaft 14 with the radial direction of the steering shaft 14 being the thickness direction. As a result, the belt 520 can be satisfactorily wound by the steering shaft 14 in a state where the tangling of the belt 520 is suppressed.
  • the belt 520 is wound in layers on the radially outer side of the steering shaft 14. For this reason, it is possible to wind the belt 520 better by the steering shaft 14 than when the belt 520 is the wire 80 having a circular cross section as in the first embodiment. Thereby, the winding state of the belt 520 can be stabilized.
  • the first stopper 522A is fixed to the housing 50.
  • the first stopper 522A is arranged on the outer side in the radial direction of the housing 50, and is arranged at the peripheral portion of the fixing hole 50H of the housing 50. You may comprise so that engagement is possible.
  • a biasing member that biases the first stopper 522A outward in the radial direction of the housing 50 may be provided as in the third embodiment. Thereby, similarly to the third embodiment, the steering force of the steering wheel 16 can be increased before the steering wheel 16 is at the maximum steering position.
  • the belt 520 is set in a slack state at the neutral position of the steering wheel 16, but the belt 520 is in a state without slack at the neutral position of the steering wheel 16.
  • You may comprise as follows.
  • a winding shaft that is parallel to the housing 50 is provided outside the housing 50 in the radial direction, and the winding shaft is rotatably supported by the housing 50 via a bracket or the like.
  • the end of one side in the longitudinal direction of the belt 520 is fixed to the winding shaft.
  • the winding shaft is rotated to one side in the rotation direction, whereby the belt 520 is wound around the winding shaft, and the winding shaft is rotated to the other side in the rotation direction by pulling out the belt 520.
  • an urging member such as a mainspring spring that urges the winding shaft to one side in the rotational direction is provided at one axial end of the winding shaft.
  • the steering apparatus 600 is configured in the same manner as in the third embodiment except for the rotation limiting mechanism 610 in the steering device 12.
  • the rotation limiting mechanism 610 members that are configured in the same manner as the rotation limiting mechanism 210 of the third embodiment are denoted by the same reference numerals.
  • the rotation limiting mechanism 610 in the seventh embodiment has a nut 620 instead of the second connecting shaft 70.
  • the rotation limiting mechanism 610 includes a screw mechanism 630 for connecting the nut 620 to the steering shaft 14, a first wire 90 as a “first connecting member”, and a second wire as a “second connecting member”. 94.
  • the nut 620 is formed in a substantially cylindrical shape.
  • the inner diameter dimension of the nut 620 is set slightly larger than the outer diameter dimension of the steering shaft 14, and the steering shaft 14 is inserted into the nut 620. .
  • the nut 620 is supported by the housing 50 so as not to rotate relative to the housing 50 and to be relatively movable in the axial direction. That is, a key groove (not shown) extending in the axial direction of the nut 620 is formed on the outer peripheral portion of the nut 620, and a key disposed in the key groove is formed on the inner peripheral portion of the housing 50. (Not shown) is provided.
  • the nut 620 has two wire insertion holes 622 (elements grasped as “nut-side insertion holes” in a broad sense) penetrating in the axial direction.
  • the wire insertion hole 622 is configured to be point symmetric with respect to the center point CP of the nut 620. In other words, the pair of wire insertion holes 622 are disposed at positions separated by 180 ° in the circumferential direction of the nut 620. Further, the wire insertion hole 622 is configured in the same manner as the wire insertion hole 72 formed in the second connecting shaft 70 of the third embodiment. That is, chamfered portions 622 ⁇ / b> A and 622 ⁇ / b> B each formed by an inclined surface are formed in the openings on both sides in the axial direction of the wire insertion hole 622.
  • the screw mechanism 630 is configured as a ball screw mechanism, and converts the rotational motion of the steering shaft 14 into a linear motion to move the nut 620 in the axial direction of the steering shaft 14. That is, the screw mechanism 630 includes a helical screw groove 632 formed on the outer peripheral portion of the steering shaft 14, a helical screw groove 634 formed on the inner peripheral portion of the nut 620, the nut 620, the steering shaft 14, and the like. And a ball 646 disposed in the screw groove 634 between the screw groove 632 and the screw groove 634. Accordingly, the nut 620 is configured to move to one side or the other side in the axial direction of the steering shaft 14 by turning the steering shaft 14 to one side or the other side in the turning direction.
  • the housing 50 is provided with a pair of first connection shafts 60, and the pair of first connection shafts 60 are disposed corresponding to the pair of wire insertion holes 622.
  • one first connecting shaft 60 forms a pair with one wire insertion hole 622 and is disposed on one side in the axial direction of the steering shaft 14 with respect to the wire insertion hole 622.
  • the other first connecting shaft 60 forms a pair with the other wire insertion hole 622 and is disposed on the other axial side of the steering shaft 14 with respect to the wire insertion hole 622.
  • the wire insertion hole 62 and the wire insertion hole 622 of the 1st connecting shaft 60 which make a pair are arrange
  • the housing 50 is integrally formed with a pair of holding walls 50 ⁇ / b> C, and the holding walls 50 ⁇ / b> C are opposite to the nuts 620 with respect to the first connection shaft 60 corresponding to the pair of first connection shafts 60. It is arranged at the side position.
  • the first wire 90 and the second wire 94 are formed in the same shape and are configured in the same manner as the wire 80 of the first embodiment. That is, stoppers 92A and 92B (stoppers 96A and 96B) are fixed to ends of both sides in the longitudinal direction of the first wire 90 (second wire 94), and the stoppers 92A and 92B (stoppers 96A and 96B) It is configured in the same manner as the stoppers 82A and 82B of the wire 80.
  • the first wire 90 and the second wire 94 connect the paired first connecting shaft 60 (the wire insertion hole 62) and the wire insertion hole 622, and the first wire 90 (the second wire 94) is connected.
  • a stopper 92A (stopper 96A) is disposed on the first connecting shaft 60 side. Further, at the neutral position of the steering wheel 16, the first wire 90 and the second wire 94 are loosened so as to connect the paired first connection shaft 60 (the wire insertion hole 62) and the wire insertion hole 622. Further, the length of the wire 80 in the longitudinal direction is set.
  • the first wire 90 and the second wire 94 are each provided with a compression coil spring 212, and the compression coil spring 212 is disposed between the stopper 92 ⁇ / b> A (stopper 96 ⁇ / b> A) and the first connecting shaft 60. Yes.
  • the compression deformation of the compression coil spring 212 attached to the second wire 94 is completed, and the first connecting shaft 60 limits the movement of the stopper 82 ⁇ / b> A to the one axial side of the housing 50. Thereby, the movement of the nut 620 is restricted and the rotation of the steering shaft 14 (steering wheel 16) is restricted.
  • the first wire 90 is extended, and the urging force of the compression coil spring 212 attached to the first wire 90 is applied to the nut via the wire 80. Act on 620.
  • the nut 620 pulls the first wire 90 in the longitudinal direction against the urging force of the compression coil spring 212. Thereby, the stopper 92A of the first wire 90 is separated from the holding wall 50C to the other axial side of the housing 50, and the movement of the nut 620 is allowed.
  • the nut 620 is arrange
  • the rotation of the steering shaft 14 can be mechanically limited by the rotation limiting mechanism 610.
  • the steering force between the front of the maximum steering position of the steering wheel 16 and the maximum steering position can be increased.
  • the steering force of the steering wheel 16 is increased using the first wire 90, the second wire 94, and the compression coil spring 212, the nut 620 and the screw mechanism 630 are used. In the rotation limiting mechanism, the steering force of the steering wheel 16 can be stably increased.
  • a structure in which the steering force of the steering wheel 16 is increased by using the frictional force can be considered.
  • a rough surface portion having a rough surface with respect to other portions is formed on a part of the inner peripheral surface of the housing 50, and the frictional force generated between the outer peripheral portion and the rough surface portion of the nut 620 is utilized.
  • the steering force before the maximum steering position of the steering wheel 16 can be increased.
  • the rough surface portion may be worn by sliding on the rough surface portion of the nut 620. Thereby, there is a possibility that the steering force of the steering wheel 16 cannot be increased stably.
  • the urging force of the compression coil spring 212 attached to the first wire 90 and the second wire 94 is used to increase the steering force of the steering wheel 16. Yes. For this reason, compared with the said structure 1, the steering force of the steering wheel 16 can be stably made high.
  • the movement of the nut 620 at the maximum steering position is limited by extending the first wire 90 or the second wire 94 that connects the nut 620 and the first connecting shaft 60.
  • the rotation of the steering wheel 16 is limited. For this reason, generation
  • the movement of the nut 620 is limited by bringing the nut 620 into contact with the stopper wall provided in the housing 50 at the maximum steering position of the steering wheel 16, for example.
  • a structure (hereinafter referred to as structure 2) is conceivable. In this structure 2, there is a possibility that a relatively large noise is generated due to the nut 620 coming into contact with the stopper wall at the maximum steering position.
  • the relative movement of the nut 620 with respect to the steering shaft 14 is restrained by the elongated first wire 90 or the second wire 94 at the maximum steering position of the steering wheel 16.
  • the nut 620 it is not necessary to apply the nut 620 to the stopper wall, so that the generation of abnormal noise can be suppressed compared to the structure 2.
  • the relative movement of the nut 620 with respect to the steering shaft 14 is configured to be retained by the elongated first wire 90 or the second wire 94, so that the steering shaft 14 can be moved from the maximum steering position as compared with the case of the structure 2. It can be smoothly rotated backward to the neutral position side.
  • the axial end surface of the nut 620 and the stopper wall are in contact with each other on the surface. Therefore, when a relatively high steering force is applied to the steering wheel 16 at the maximum steering position of the steering wheel 16, a relatively high friction is generated between the axial end surface of the nut 620 and the stopper wall. Power can be generated. For this reason, when the steering wheel 16 is returned from the maximum steering position, the nut 620 acts so as to be hard to the stopper wall, and the steering shaft 14 may not smoothly rotate backward to the neutral position side.
  • the relative movement of the nut 620 with respect to the steering shaft 14 at the maximum steering position of the steering wheel 16 is caused to extend the first wire 90 or the second wire 94. Acts to hold on. This eliminates the need for the end face of the nut 620 in the axial direction and the stopper wall to be in contact with each other as in the structure 2 described above. For this reason, compared with the said structure 2, the steering shaft 14 can be reversely rotated smoothly from the maximum steering position to the neutral position side.
  • the screw mechanism 630 is configured as a ball screw mechanism, and the nut 620 is configured to be movable in the axial direction of the steering shaft 14.
  • the nut 620 and the steering shaft 14 may be screwed together so that the nut 620 can be moved in the axial direction of the steering shaft 14.
  • the screw mechanism 630 includes a male screw portion formed on the outer peripheral portion of the steering shaft 14 and a female screw portion formed on the inner peripheral portion of the nut 620 and screwed with the male screw portion. May be.
  • first wire 90 and the second wire 94 are each set to one, but the first wire 90 and the second wire 94 may be set to a plurality of each. Good.
  • the rotation restriction mechanism 610 includes the first wire 90 and the second wire 94. However, in the rotation restriction mechanism 610, one of the first wire 90 and the second wire 94 may be omitted. Good. Further, when the first wire 90 (second wire 94) is omitted, the steering wheel 16 is in contact with the nut 620 at the maximum steering position and the other side of the steering wheel 16 in the rotational direction (one side in the rotational direction).
  • the housing 50 may be provided with a stopper that restricts the rotation of the housing 50.
  • the wire 80 and the belt 520 are made of flexible metal, but the material of the wire 80 and the belt 520 is not limited to this. Not exclusively.
  • the wire 80 and the belt 520 may be made of cloth. That is, the wire 80 and the belt 520 may be flexible and have a predetermined tensile strength.
  • the diameters of the wire 80, the first wire 90, and the second wire 94 are not particularly defined.
  • the diameter dimensions of the wire 90 and the second wire 94 can be arbitrarily set.
  • the width dimension and the thickness dimension of the belt 520 are not particularly defined, but the width dimension and the thickness dimension of the belt 520 can be arbitrarily set.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The present invention mechanically restricts the turning of a steering wheel. This steering apparatus (10) comprises: a steering shaft (14) which turns in accordance with steering of a steering wheel (16); a housing (50) which covers the steering shaft (14) from the outside in the radial direction; and a turning restriction mechanism (24) which restricts the turning of the steering shaft (14) to one side or the other side in the turning direction when the steering wheel (16) is turned from a neutral position to a maximum steering position. The turning restriction mechanism (24) is configured by including a coupling member (80) which has flexibility and is formed in a long shape, and which couples the steering shaft (14) and the housing (50), the coupling member (80) being wrapped to the steering shaft (14) in an extended state when the steering wheel (16) is turned from the neutral position to the maximum steering position.

Description

ステアリング装置Steering device
 本発明は、ステアリング装置に関する。 The present invention relates to a steering device.
 下記特許文献1に記載のステアリング装置は、運転者による操舵を入力するための操舵装置と、車輪を転舵するための転舵装置と、を含んで構成されている。また、操舵装置及び転舵装置が、クラッチによって連結可能に構成されており、クラッチによる両者の連結が遮断されたときは、ステアリング装置がステアリングバイワイヤとして実行される。さらに、操舵装置は反力モータ(反力アクチュエータ)を有している。そして、ステアリング装置がステアリングバイワイヤとして実行されたときに、路面から受ける反力に応じて反力モータを作動させることで、運転者の操舵に対して操舵反力を付与するようになっている。 The steering device described in Patent Document 1 below includes a steering device for inputting steering by a driver and a steering device for turning wheels. Further, the steering device and the steered device are configured to be connectable by a clutch, and when the connection of both by the clutch is cut off, the steering device is executed as a steering-by-wire. Furthermore, the steering device has a reaction force motor (reaction force actuator). When the steering device is executed as steering-by-wire, the reaction force motor is operated in accordance with the reaction force received from the road surface, thereby giving a steering reaction force to the driver's steering.
特開2014-156152号公報JP 2014-156152 A
 ところで、上記特許文献1に記載のステアリング装置では、ステアリングホイールが最大操舵角となる位置に操舵されたときには、反力モータを作動させることで、ステアリングホイールの最大操舵角以上の回動を制限するようになっている。具体的には、反力モータによって発生するトルクを高くするように反力モータを制御して、ステアリングホイールの回動を制限している。これにより、反力モータによって所定のトルクを発生させる必要があるため、反力モータの大型化を招くという問題がある。したがって、ステアリングバイワイヤ方式のステアリング装置では、反力モータの大型化を抑制するという観点から、ステアリングホイールの回動を機械的に制限する構造にすることが望ましい。 By the way, in the steering device disclosed in Patent Document 1, when the steering wheel is steered to a position where the maximum steering angle is obtained, the reaction motor is operated to limit the rotation of the steering wheel beyond the maximum steering angle. It is like that. Specifically, the rotation of the steering wheel is limited by controlling the reaction force motor so as to increase the torque generated by the reaction force motor. Thereby, since it is necessary to generate a predetermined torque by the reaction force motor, there is a problem that the reaction force motor is increased in size. Therefore, in a steering-by-wire type steering apparatus, it is desirable to have a structure that mechanically restricts the rotation of the steering wheel from the viewpoint of suppressing an increase in the size of the reaction force motor.
 本発明は、上記事実を考慮して、ステアリングホイールの回動を機械的に制限することができるステアリング装置を提供することを目的とする。 The present invention has an object of providing a steering device that can mechanically limit the rotation of the steering wheel in consideration of the above facts.
 本発明の1またはそれ以上の実施形態は、ステアリングホイールの操舵に伴って回動するステアリングシャフトと、前記ステアリングシャフトを径方向外側から覆うハウジングと、可撓性を有する長尺状に形成され、前記ステアリングシャフト及び前記ハウジングを連結すると共に、前記ステアリングホイールが中立位置から最大操舵位置へ操舵されたときに伸長した状態で前記ステアリングシャフトに巻付けられて前記ステアリングシャフトの回動方向一方側または回動方向他方側の回動を制限する連結部材と、を備えたステアリング装置である。 One or more embodiments of the present invention are formed in a long and flexible shape, a steering shaft that rotates as the steering wheel is steered, a housing that covers the steering shaft from the outside in the radial direction, The steering shaft and the housing are connected to each other, and the steering wheel is wound around the steering shaft in an extended state when the steering wheel is steered from the neutral position to the maximum steering position, and the steering shaft is turned to one side or the rotation direction. And a connecting member that restricts rotation on the other side in the moving direction.
 本発明の1またはそれ以上の実施形態は、前記連結部材の長手方向両端部が、前記ステアリングシャフトの軸方向に離間して配置されており、前記ステアリングシャフトが中立位置から回動されたときには、前記連結部材が前記ステアリングシャフトの外周部に螺旋状に巻付けられるステアリング装置である。 In one or more embodiments of the present invention, the longitudinal ends of the connecting member are spaced apart in the axial direction of the steering shaft, and when the steering shaft is rotated from a neutral position, In the steering device, the connecting member is spirally wound around an outer peripheral portion of the steering shaft.
 本発明の1またはそれ以上の実施形態は、前記ハウジングには、前記ハウジングから前記ステアリングシャフト側へ突出され且つ前記連結部材をハウジングに連結するハウジング側連結部が設けられ、前記ステアリングシャフトには、前記ステアリングシャフトから前記ハウジング側へ突出され且つ前記連結部材を前記ステアリングシャフトに連結するシャフト側連結部が設けられ、前記連結部材は、断面円形状に形成されており、前記ハウジング側連結部と前記ステアリングシャフトとの間の隙間及び前記シャフト側連結部と前記ハウジングとの間の隙間が、前記連結部材の外径と比べて小さく設定されているステアリング装置である。 In one or more embodiments of the present invention, the housing is provided with a housing side connecting portion that protrudes from the housing to the steering shaft side and connects the connecting member to the housing. A shaft-side connecting portion that protrudes from the steering shaft to the housing side and connects the connecting member to the steering shaft is provided, and the connecting member is formed in a circular cross section, and the housing-side connecting portion and the In the steering apparatus, a gap between the steering shaft and a gap between the shaft side connecting portion and the housing are set to be smaller than an outer diameter of the connecting member.
 本発明の1またはそれ以上の実施形態は、前記ハウジング側連結部には、前記ステアリングシャフトの軸方向に貫通され且つ前記連結部材が挿通される第1挿通孔が形成され、前記シャフト側連結部には、前記ステアリングシャフトの軸方向に貫通され且つ前記連結部材が挿通される第2挿通孔が形成されており、前記ハウジング側連結部が、前記ステアリングシャフトの径方向を軸方向として前記ハウジングに回動可能に支持され、前記シャフト側連結部が、前記ステアリングシャフトの径方向を軸方向として前記ステアリングシャフトに回動可能に支持されているステアリング装置である。 In one or more embodiments of the present invention, the housing side connecting portion is formed with a first insertion hole that penetrates in the axial direction of the steering shaft and through which the connecting member is inserted. Is formed with a second insertion hole penetrating in the axial direction of the steering shaft and through which the connecting member is inserted, and the housing side connecting portion is formed in the housing with the radial direction of the steering shaft as the axial direction. The steering device is rotatably supported, and the shaft side connecting portion is rotatably supported by the steering shaft with the radial direction of the steering shaft as an axial direction.
 本発明の1またはそれ以上の実施形態は、前記連結部材が、前記ステアリングシャフト及び前記ハウジングの少なくとも一方とボールジョイントによって連結されているステアリング装置である。 One or more embodiments of the present invention are steering devices in which the connecting member is connected to at least one of the steering shaft and the housing by a ball joint.
 本発明の1またはそれ以上の実施形態は、前記連結部材の長手方向一端部が、前記ハウジングの外周部に固定されており、前記連結部材が、前記ハウジングに形成された挿通孔から前記ステアリングシャフトへ向けて延出されているステアリング装置である。 In one or more embodiments of the present invention, one end in the longitudinal direction of the connecting member is fixed to the outer peripheral portion of the housing, and the connecting member is inserted into the steering shaft from an insertion hole formed in the housing. This is a steering device that extends toward the vehicle.
 本発明の1またはそれ以上の実施形態は、前記連結部材が、帯状に形成されると共に、前記ステアリングシャフトの軸方向において、前記連結部材の長手方向両端部の位置が一致しており、前記ステアリングシャフトが中立位置から回動されたときには、前記連結部材が前記ステアリングシャフトの径方向を厚み方向として前記ステアリングシャフトの外周部に巻付けられるステアリング装置である。 In one or more embodiments of the present invention, the connecting member is formed in a strip shape, and the positions of both end portions in the longitudinal direction of the connecting member coincide with each other in the axial direction of the steering shaft. When the shaft is rotated from a neutral position, the coupling member is wound around the outer periphery of the steering shaft with the radial direction of the steering shaft as a thickness direction.
 本発明の1またはそれ以上の実施形態は、前記連結部材の長手方向両端部の少なくとも一方には、前記連結部材を長手方向外側へ付勢する付勢部材が設けられているステアリング装置である。 One or more embodiments of the present invention are steering devices in which at least one of the longitudinal ends of the connecting member is provided with a biasing member that biases the connecting member outward in the longitudinal direction.
 本発明の1またはそれ以上の実施形態は、前記ハウジングには、前記付勢部材が設けられた前記連結部材の端部を保持する保持部が設けられているステアリング装置である。 One or more embodiments of the present invention are steering devices in which the housing is provided with a holding portion that holds an end portion of the connecting member provided with the biasing member.
 本発明の1またはそれ以上の実施形態は、前記連結部材の長手方向一端部が、可変機構に連結されており、前記可変機構は、作動することによって、前記連結部材の長手方向一端部を前記ハウジングに対して相対変位させて、前記ステアリングホイールの最大操舵位置を可変にするステアリング装置である。 In one or more embodiments of the present invention, one end portion of the connecting member in the longitudinal direction is connected to a variable mechanism, and the variable mechanism operates to connect the one end portion of the connecting member in the longitudinal direction. The steering device is configured to change a maximum steering position of the steering wheel by being displaced relative to a housing.
 本発明の1またはそれ以上の実施形態は、前記ハウジングは、可変機構に連結されており、前記可変機構は、作動することによって、前記ハウジングを前記ステアリングシャフトに対して相対変位させて、前記ステアリングホイールの最大操舵位置を可変にするステアリング装置である。 In one or more embodiments of the present invention, the housing is connected to a variable mechanism, and the variable mechanism is operated to displace the housing relative to the steering shaft, thereby the steering. This is a steering device that makes the maximum steering position of the wheel variable.
 本発明の1またはそれ以上の実施形態は、前記連結部材の破断を検出又は予知する破断検出部と、前記破断検出部が前記連結部材の破断を検出したとき又は前記連結部材の破断を予知したときに、その旨を報知する報知部と、を備えたステアリング装置である。 One or more embodiments of the present invention detect or predict a breakage of the connecting member, and when the breakage detecting unit detects a breakage of the connecting member or predicts a breakage of the connecting member In some cases, the steering device includes a notification unit that notifies the fact.
 本発明の1またはそれ以上の実施形態は、前記連結部材が複数設けられているステアリング装置である。 One or more embodiments of the present invention are steering devices provided with a plurality of the connecting members.
 本発明の1またはそれ以上の実施形態は、ステアリングホイールの操舵に伴って回動するステアリングシャフトと、前記ステアリングシャフトを径方向外側から覆うハウジングと、前記ステアリングシャフトの径方向外側に設けられ、前記ステアリングシャフトの回動時にネジ機構によって前記ステアリングシャフトの軸方向に移動されるナットと、前記ステアリングホイールが中立位置から最大操舵位置へ回動されたときに前記ステアリングシャフトの回動方向一方側または回動方向他方側の回動を制限する回動制限機構と、を備え、前記回動制限機構は、可撓性を有する長尺状に形成され、前記ナットから前記ステアリングシャフトの軸方向一方側へ延在されると共に、前記ナットと前記ハウジングとを連結する第1連結部材と、可撓性を有する長尺状に形成され、前記ナットから前記ステアリングシャフトの軸方向他方側へ延在されると共に、前記ナットと前記ハウジングとを連結する第2連結部材と、のうち少なくとも一方を含んで構成されており、前記ステアリングホイールが中立位置から最大操舵位置へ回動されたときに、前記第1連結部材又は前記第2連結部材が長手方向に伸長されて、前記ナットの移動を制限するステアリング装置である。 One or more embodiments of the present invention are provided on a steering shaft that rotates with steering of a steering wheel, a housing that covers the steering shaft from a radially outer side, a radially outer side of the steering shaft, A nut that is moved in the axial direction of the steering shaft by a screw mechanism when the steering shaft rotates, and one side or a rotation direction of the steering shaft when the steering wheel is rotated from the neutral position to the maximum steering position. A rotation limiting mechanism for limiting rotation on the other side of the moving direction, and the rotation limiting mechanism is formed in an elongated shape having flexibility, and extends from the nut to one side in the axial direction of the steering shaft. A first connecting member that extends and connects the nut and the housing; And is configured to include at least one of a second connecting member that extends from the nut to the other axial side of the steering shaft and connects the nut and the housing. The steering device is configured such that when the steering wheel is rotated from the neutral position to the maximum steering position, the first connecting member or the second connecting member is extended in the longitudinal direction to restrict the movement of the nut. It is.
(A)は、第1の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構の作動後の状態を示す斜視図であり、(B)は、(A)に示される回動制限機構を一部破断した断面図(図1(A)の1A-1A線断面図)である。(A) is a perspective view which shows the state after the action | operation of the rotation limiting mechanism used for the steering apparatus of the steering device which concerns on 1st Embodiment, (B) is the rotation shown by (A). FIG. 2 is a cross-sectional view (a cross-sectional view taken along line 1A-1A in FIG. 1A) in which the restriction mechanism is partially broken. 第1の実施の形態に係るステアリング装置の全体を示す模式図である。1 is a schematic diagram illustrating an entire steering apparatus according to a first embodiment. 図1(A)に示される回動制限機構の作動前の状態を示す斜視図である。It is a perspective view which shows the state before the action | operation of the rotation limitation mechanism shown by FIG. 1 (A). (A)は、図1(B)に示される回動制限機構のバリエーション1を示す断面図であり、(B)は、図1(B)に示される回動制限機構のバリエーション2を示す断面図である。(A) is sectional drawing which shows the variation 1 of the rotation limitation mechanism shown by FIG. 1 (B), (B) is a cross section which shows the variation 2 of the rotation limitation mechanism shown by FIG. 1 (B). FIG. 図1(B)に示される回動制限機構のバリエーション3を示す断面図である。It is sectional drawing which shows the variation 3 of the rotation limitation mechanism shown by FIG. 1 (B). (A)は、第2の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構における第1連結軸周辺を示す断面図であり、(B)は、第2の実施の形態の回動制限機構における第2連結軸周辺を示す断面図である。(A) is sectional drawing which shows the 1st connection shaft periphery in the rotation limiting mechanism used for the steering apparatus of the steering apparatus which concerns on 2nd Embodiment, (B) is 2nd Embodiment. It is sectional drawing which shows the 2nd connection shaft periphery in a rotation limiting mechanism. (A)は、第2の実施の形態の回動制限機構における、ワイヤとハウジングとの連結の別例を示す断面図であり、(B)は、第2の実施の形態の回動制限機構における、ワイヤとステアリングシャフトとの連結をボールジョイントにした例を示す断面図である。(A) is sectional drawing which shows another example of the connection of a wire and a housing in the rotation limiting mechanism of 2nd Embodiment, (B) is the rotation limiting mechanism of 2nd Embodiment. It is sectional drawing which shows the example which connected the connection of a wire and a steering shaft in the ball joint. (A)は、第3の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構における第1連結軸周辺を示す断面図であり、(B)は、(A)に示される回動制限機構の作動後の状態を示す断面図である。(A) is sectional drawing which shows the 1st connection shaft periphery in the rotation limiting mechanism used for the steering apparatus of the steering device which concerns on 3rd Embodiment, (B) is a rotation shown by (A). It is sectional drawing which shows the state after the action | operation of a movement limitation mechanism. 第4の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構の作動前の状態を示す断面図である。It is sectional drawing which shows the state before the action | operation of the rotation limitation mechanism used for the steering apparatus of the steering device which concerns on 4th Embodiment. 図9に示される回動制限機構をハウジングの径方向外側から見た側面図である。It is the side view which looked at the rotation limiting mechanism shown in FIG. 9 from the radial direction outer side of the housing. 図9に示される回動制限機構の作動後の状態を示す断面図である。It is sectional drawing which shows the state after the action | operation of the rotation limitation mechanism shown by FIG. (A)は、第4の実施の形態の回動制限機構に用いられる可変機構の変形例1を示すハウジングの径方向外側から見た側面図であり、(B)は、(A)に示される可変機構の変形例1を一部破断した断面図(図12(A)の12B-12B線断面図)である。(A) is the side view seen from the radial direction outer side of the housing which shows the modification 1 of the variable mechanism used for the rotation restriction mechanism of a 4th embodiment, and (B) is shown in (A). FIG. 13 is a cross-sectional view (a cross-sectional view taken along line 12B-12B in FIG. 12A) of a first modification of the variable mechanism. 第4の実施の形態の回動制限機構に用いられる可変機構の変形例2を示す断面図である。It is sectional drawing which shows the modification 2 of the variable mechanism used for the rotation limitation mechanism of 4th Embodiment. 第4の実施の形態の回動制限機構に用いられる可変機構の変形例3を示す断面図である。It is sectional drawing which shows the modification 3 of the variable mechanism used for the rotation restriction mechanism of 4th Embodiment. 第5の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構の作動後の状態を示す断面図である。It is sectional drawing which shows the state after the action | operation of the rotation limitation mechanism used for the steering apparatus of the steering device which concerns on 5th Embodiment. (A)は、第6の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構の作動前の状態を示すステアリングシャフトの軸方向から見た断面図であり、(B)は、(A)に示される回動制限機構の第1ストッパ及び第2ストッパ周辺を示す断面図(図16(A)の16B-16B線断面図)である。(A) is sectional drawing seen from the axial direction of the steering shaft which shows the state before the action | operation of the rotation limitation mechanism used for the steering apparatus of the steering device which concerns on 6th Embodiment, (B) FIG. 17 is a cross-sectional view (a cross-sectional view taken along line 16B-16B in FIG. 16A) showing the periphery of the first stopper and the second stopper of the rotation limiting mechanism shown in FIG. 第7の実施の形態に係るステアリング装置の操舵装置に用いられる回動制限機構を示す断面図である。It is sectional drawing which shows the rotation limiting mechanism used for the steering apparatus of the steering device which concerns on 7th Embodiment.
(第1の実施の形態)
 以下、図1~図3を用いて、第1の実施の形態のステアリング装置10について説明する。図2に示されるように、ステアリング装置10は、車両(自動車)の前部に設置されている。このステアリング装置10は、運転者によって操舵される操舵装置12と、車両の車輪(前輪)Hを転舵させるための転舵装置30と、を含んで構成されており、操舵装置12及び転舵装置30の機械的連結が切り離された状態になっている。また、ステアリング装置10は、操舵装置12及び転舵装置30を制御する制御部(ECU)40を有している。すなわち、ステアリング装置10は、所謂ステアリングバイワイヤ方式のステアリング装置として構成されている。以下、ステアリング装置10の各構成について説明する。
(First embodiment)
Hereinafter, the steering apparatus 10 according to the first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIG. 2, the steering device 10 is installed at the front of a vehicle (automobile). The steering device 10 includes a steering device 12 that is steered by a driver, and a steering device 30 that steers a wheel (front wheel) H of the vehicle. The mechanical connection of the device 30 is disconnected. In addition, the steering device 10 includes a control unit (ECU) 40 that controls the steering device 12 and the steering device 30. That is, the steering device 10 is configured as a so-called steering-by-wire type steering device. Hereinafter, each component of the steering device 10 will be described.
<操舵装置の構成>
 操舵装置12は、ステアリングシャフト14と、ステアリングホイール16と、操舵角センサ18と、トルクセンサ20と、反力モータ(反力アクチュエータ)22と、回動制限機構24と、を含んで構成されている。
 ステアリングシャフト14は、略丸棒状に形成されると共に、車両上方側から見て前後方向に延在されている。具体的には、図示は省略するが、ステアリングシャフト14は、車両後側へ向かうに従い車両上方側へ傾斜して配置されており、ステアリングシャフト14の後端部(軸方向一方側(図2の矢印A方向側)の端部)が、車両のキャビン内における運転席の前側に配置されている。また、ステアリングシャフト14は、操舵装置12の外郭を構成する操舵ハウジング12Aによって回動可能に支持されており、操舵ハウジング12Aは図示しないブラケット等によって車体に固定されている。
<Configuration of steering device>
The steering device 12 includes a steering shaft 14, a steering wheel 16, a steering angle sensor 18, a torque sensor 20, a reaction force motor (reaction force actuator) 22, and a rotation limiting mechanism 24. Yes.
The steering shaft 14 is formed in a substantially round bar shape and extends in the front-rear direction when viewed from the vehicle upper side. Specifically, although illustration is omitted, the steering shaft 14 is disposed so as to incline toward the vehicle upper side toward the vehicle rear side, and the rear end portion (one side in the axial direction of the steering shaft 14 (in FIG. 2)). The end portion of the arrow A direction side) is disposed in front of the driver's seat in the cabin of the vehicle. Further, the steering shaft 14 is rotatably supported by a steering housing 12A that constitutes the outline of the steering device 12, and the steering housing 12A is fixed to the vehicle body by a bracket or the like (not shown).
 ステアリングホイール16は、略円環状に形成されて、図示しないスポークを介してステアリングシャフト14の後端部に一体回動可能に固定されている。これにより、ステアリングホイール16が回動方向一方側又は他方側へ回動されることで、ステアリングシャフト14が自身の軸回りに回動するようになっている。また、本実施の形態では、ステアリングホイール16の許容操舵角が、一例として、720°に設定されている。すなわち、ステアリングホイール16の最大操舵角(中立位置(車両が前進走行するときのステアリングホイール16の位置)から回動方向一方側又は他方側へ回動できる最大角度)が360°に設定されている。そして、以下の説明では、最大操舵角に操舵されたときのステアリングホイール16の位置を、「最大操舵位置」と称する。また、ステアリングホイール16が最大操舵位置に回動されたときには、ステアリングホイール16の回動が、後述する回動制限機構24によって制限される構成になっている。なお、回動制限機構24の詳細については、後述する。 The steering wheel 16 is formed in a substantially annular shape, and is fixed to the rear end portion of the steering shaft 14 via a spoke (not shown) so as to be integrally rotatable. Thereby, the steering shaft 16 is rotated about its own axis by rotating the steering wheel 16 to one side or the other side of the rotation direction. In the present embodiment, the allowable steering angle of the steering wheel 16 is set to 720 ° as an example. That is, the maximum steering angle of the steering wheel 16 (the maximum angle at which the steering wheel 16 can rotate from the neutral position (the position of the steering wheel 16 when the vehicle travels forward) to the one side or the other side) is set to 360 °. . In the following description, the position of the steering wheel 16 when it is steered to the maximum steering angle is referred to as “maximum steering position”. Further, when the steering wheel 16 is rotated to the maximum steering position, the rotation of the steering wheel 16 is limited by a rotation limiting mechanism 24 described later. The details of the rotation limiting mechanism 24 will be described later.
 操舵角センサ18は、ステアリングシャフト14の軸方向一方側の部分に設けられている。この操舵角センサ18は、例えば、レゾルバを用いたセンサとして構成されており、ステアリングシャフト14の操舵角を検出するようになっている。また、操舵角センサ18は、制御部40に電気的に接続されており、検出したステアリングシャフト14の操舵角を制御部40へ出力するように構成されている。 The steering angle sensor 18 is provided on one side of the steering shaft 14 in the axial direction. The steering angle sensor 18 is configured as a sensor using a resolver, for example, and detects the steering angle of the steering shaft 14. The steering angle sensor 18 is electrically connected to the control unit 40, and is configured to output the detected steering angle of the steering shaft 14 to the control unit 40.
 トルクセンサ20は、ステアリングシャフト14の軸方向一方側の部分で、且つ操舵角センサ18に対してステアリングシャフト14の先端側に設けられている。このトルクセンサ20はステアリングシャフト14の操舵トルクを検出するようになっている。また、トルクセンサ20は、制御部40に電気的に接続されており、検出したステアリングシャフト14の操舵トルクを制御部40へ出力するように構成されている。 The torque sensor 20 is provided on the one side in the axial direction of the steering shaft 14 and on the distal end side of the steering shaft 14 with respect to the steering angle sensor 18. This torque sensor 20 detects the steering torque of the steering shaft 14. The torque sensor 20 is electrically connected to the control unit 40 and is configured to output the detected steering torque of the steering shaft 14 to the control unit 40.
 反力モータ22は、ステアリングシャフト14の先端側(軸方向他方側(図2の矢印B方側)であり、車両の前側)の端部に設けられると共に、制御部40に電気的に接続されている。そして、制御部40の制御によって反力モータ22が作動することで、操舵方向とは反対側のトルクをステアリングホイール16に生じさせるようになっている。 The reaction force motor 22 is provided at the end of the front end side of the steering shaft 14 (the other side in the axial direction (arrow B direction in FIG. 2) and the front side of the vehicle) and is electrically connected to the control unit 40. ing. Then, the reaction force motor 22 is operated by the control of the control unit 40, so that torque on the opposite side to the steering direction is generated in the steering wheel 16.
<転舵装置の構成>
 転舵装置30は、車両のパワーユニット室(図示省略)において、車両の左右一対の車輪Hの間に配置されると共に、車両の左右方向(車幅方向)に延在されている。この転舵装置30は、車両の左右方向に延在された転舵ロッド32を有しており、転舵ロッド32の長手方向両端部が、タイロッド34を介して車輪Hに連結されている。転舵ロッド32の長手方向中間部には、図示しないラック部が形成されており、ラック部には、転舵モータ36に連結されたピニオン(図示省略)が噛合されている。また、転舵モータ36は、制御部40に電気的に接続されており、制御部40の制御によって転舵モータ36が駆動することで、車輪Hが転舵されるようになっている。
<Configuration of steering device>
The steering device 30 is disposed between a pair of left and right wheels H of the vehicle in a power unit chamber (not shown) of the vehicle, and extends in the left-right direction (vehicle width direction) of the vehicle. The steered device 30 has a steered rod 32 that extends in the left-right direction of the vehicle, and both longitudinal ends of the steered rod 32 are connected to wheels H via tie rods 34. A rack portion (not shown) is formed in the middle portion in the longitudinal direction of the steered rod 32, and a pinion (not shown) connected to the steered motor 36 is engaged with the rack portion. The steered motor 36 is electrically connected to the control unit 40, and the wheels H are steered when the steered motor 36 is driven by the control of the control unit 40.
 また、転舵モータ36には、転舵センサ38が設けられており、転舵センサ38は、路面状況によって車輪Hに作用する反力を電流として検出して、制御部40へ出力するようになっている。そして、制御部40は、転舵センサ38からの出力に基づいて、反力モータ22を駆動させるように構成されている。 Further, the steered motor 36 is provided with a steered sensor 38, and the steered sensor 38 detects a reaction force acting on the wheel H as a current depending on the road surface condition, and outputs it to the control unit 40. It has become. The control unit 40 is configured to drive the reaction force motor 22 based on the output from the steering sensor 38.
<回動制限機構について>
 次に、本発明の要部である回動制限機構24について説明する。図2に示されるように、回動制限機構24は、操舵装置12の一部を構成すると共に、反力モータ22とトルクセンサ20との間に配置されている。図1及び図3に示されるように、回動制限機構24は、回動制限機構24の外郭を構成するハウジング50と、「ハウジング側連結部」としての第1連結軸60と、「シャフト側連結部」としての第2連結軸70と、「連結部材」としてのワイヤ80と、を含んで構成されている。
<About the rotation restriction mechanism>
Next, the rotation limiting mechanism 24 that is a main part of the present invention will be described. As shown in FIG. 2, the rotation limiting mechanism 24 constitutes a part of the steering device 12 and is disposed between the reaction force motor 22 and the torque sensor 20. As shown in FIGS. 1 and 3, the rotation limiting mechanism 24 includes a housing 50 that constitutes an outline of the rotation limiting mechanism 24, a first connection shaft 60 as a “housing side connection portion”, and a “shaft side”. A second connecting shaft 70 as a “connecting portion” and a wire 80 as a “connecting member” are included.
 ハウジング50は、略円筒状に形成されると共に、ステアリングシャフト14と同軸上に配置されて、ステアリングシャフト14を径方向外側から覆っている。このハウジング50は、操舵装置12の外郭を構成する操舵ハウジング12Aの一部を構成している。また、ハウジング50には、後述する第1連結軸60を固定するための固定部52が一体に形成されており、固定部52は、ハウジング50の径方向外側へ突出された略円筒状に形成されている。また、固定部52の基端側の開口部には、ハウジング50の径方向内側へ開放された凹状のザグリ部52A(図1(B)参照)が形成されている。ザグリ部52Aは、断面略円形状に形成されており、ザグリ部52Aの底面が、固定部52の軸方向に対して直交する面に沿って配置されている。 The housing 50 is formed in a substantially cylindrical shape, is disposed coaxially with the steering shaft 14, and covers the steering shaft 14 from the outside in the radial direction. The housing 50 constitutes a part of the steering housing 12 </ b> A that constitutes the outline of the steering device 12. The housing 50 is integrally formed with a fixing portion 52 for fixing a first connecting shaft 60 to be described later, and the fixing portion 52 is formed in a substantially cylindrical shape protruding outward in the radial direction of the housing 50. Has been. In addition, a concave counterbore 52A (see FIG. 1B) opened to the inside in the radial direction of the housing 50 is formed in the opening on the proximal end side of the fixed portion 52. The counterbore part 52 </ b> A has a substantially circular cross section, and the bottom surface of the counterbore part 52 </ b> A is disposed along a plane orthogonal to the axial direction of the fixed part 52.
 第1連結軸60は、ハウジング50の径方向を軸方向とした略円柱状に形成されている。具体的には、第1連結軸60は、第1連結軸60の基端側の部分を構成する取付軸部60Aと、第1連結軸60の先端側の部分を構成する連結軸部60Bと、を含んで構成されており、連結軸部60Bの径寸法が取付軸部60Aの径寸法よりも大きく設定されている。また、第1連結軸60の長手方向中間部には、略円環状のフランジ60Cが形成されており、フランジ60Cは、連結軸部60Bの外周部に対して径方向外側へ突出されている。 The first connecting shaft 60 is formed in a substantially cylindrical shape with the radial direction of the housing 50 as the axial direction. Specifically, the first connecting shaft 60 includes a mounting shaft portion 60 </ b> A that forms a proximal end portion of the first connecting shaft 60, and a connecting shaft portion 60 </ b> B that forms a distal end side portion of the first connecting shaft 60. The diameter of the connecting shaft 60B is set larger than the diameter of the mounting shaft 60A. Further, a substantially annular flange 60C is formed at the longitudinal intermediate portion of the first connecting shaft 60, and the flange 60C protrudes radially outward with respect to the outer peripheral portion of the connecting shaft portion 60B.
 そして、第1連結軸60の取付軸部60Aが、ハウジング50の固定部52の孔部52B内に径方向内側から嵌入されて、第1連結軸60が、ハウジング50に固定されている。これにより、第1連結軸60がステアリングシャフト14の径方向外側に離間された状態で配置されており、第1連結軸60の先端面とステアリングシャフト14の外周面との間には、隙間G1(図1(B)参照)が形成されている。また、第1連結軸60のハウジング50への固定状態では、第1連結軸60のフランジ60Cがハウジング50のザグリ部52A内に配置されており、フランジ60Cの基端側の面が、ザグリ部52Aの底面に当接されている。これにより、ハウジング50の径方向において、第1連結軸60が、位置決めされた状態で、ハウジング50に固定されている。 The mounting shaft portion 60 </ b> A of the first connecting shaft 60 is fitted into the hole 52 </ b> B of the fixing portion 52 of the housing 50 from the inside in the radial direction, and the first connecting shaft 60 is fixed to the housing 50. As a result, the first connecting shaft 60 is disposed in a state of being spaced radially outward of the steering shaft 14, and there is a gap G <b> 1 between the front end surface of the first connecting shaft 60 and the outer peripheral surface of the steering shaft 14. (See FIG. 1B). When the first connecting shaft 60 is fixed to the housing 50, the flange 60C of the first connecting shaft 60 is disposed in the counterbore 52A of the housing 50, and the base end side surface of the flange 60C is the counterbore portion. It is in contact with the bottom surface of 52A. Thereby, in the radial direction of the housing 50, the first connecting shaft 60 is fixed to the housing 50 in a positioned state.
 また、第1連結軸60の連結軸部60Bには、円形状の「第1挿通孔」としてのワイヤ挿通孔62が形成されており、ワイヤ挿通孔62は、連結軸部60Bの径方向(具体的には、ハウジング50の軸方向)に貫通されている。ワイヤ挿通孔62の軸方向両側の開口部には、面取部62A,62Bが形成されており、面取部62A,62Bは、第1連結軸60の縦断面視で、ワイヤ挿通孔62の軸方向両側へ向かうに従いワイヤ挿通孔62の径方向外側へ傾斜されている。すなわち、面取部62A,62Bは、傾斜面によって構成されると共に、ワイヤ挿通孔62の開口側へ末広がりとなる略円錐状に形成されている。 In addition, a wire insertion hole 62 as a circular “first insertion hole” is formed in the connection shaft portion 60B of the first connection shaft 60, and the wire insertion hole 62 is formed in the radial direction of the connection shaft portion 60B (see FIG. Specifically, it penetrates in the axial direction of the housing 50. Chamfered portions 62A and 62B are formed at openings on both sides in the axial direction of the wire insertion hole 62. The chamfered portions 62A and 62B are formed in the wire insertion hole 62 in a longitudinal sectional view of the first connecting shaft 60. As it goes to both sides in the axial direction, the wire insertion hole 62 is inclined outward in the radial direction. That is, the chamfered portions 62A and 62B are formed of inclined surfaces and are formed in a substantially conical shape that spreads toward the opening side of the wire insertion hole 62.
 第2連結軸70は、ステアリングシャフト14の径方向を軸方向とした略円柱状に形成されると共に、第1連結軸60に対してステアリングシャフト14の軸方向他方側(図1及び図3の矢印B方向側)に配置されている。そして、図示は省略するが、第2連結軸70の基端部が、ステアリングシャフト14に形成された孔部内に嵌入されて、第2連結軸70の先端部がステアリングシャフト14に対して径方向外側へ突出された状態で、第2連結軸70がステアリングシャフト14に固定されている。そして、第2連結軸70の先端面とハウジング50の内周面との間には、隙間G2(図1(B)参照)が形成されており、ステアリングシャフト14の径方向における隙間G1及び隙間G2の寸法が同じ寸法に設定されている。 The second connecting shaft 70 is formed in a substantially columnar shape with the radial direction of the steering shaft 14 as the axial direction, and the other axial side of the steering shaft 14 with respect to the first connecting shaft 60 (see FIGS. 1 and 3). (Arrow B direction side). Although not shown, the proximal end portion of the second connecting shaft 70 is fitted into a hole formed in the steering shaft 14, and the distal end portion of the second connecting shaft 70 is radial with respect to the steering shaft 14. The second connecting shaft 70 is fixed to the steering shaft 14 in a state of protruding outward. A gap G2 (see FIG. 1B) is formed between the distal end surface of the second connecting shaft 70 and the inner peripheral surface of the housing 50, and the gap G1 and the gap in the radial direction of the steering shaft 14 are formed. The dimension of G2 is set to the same dimension.
 また、ステアリングホイール16が中立位置に配置された状態(図3に示される状態)では、ステアリングシャフト14の周方向における第1連結軸60及び第2連結軸70の位置が一致する設定になっている。換言すると、ステアリングホイール16の中立位置では、ステアリングシャフト14の軸方向から見て、第1連結軸60と第2連結軸70とがラップして(重なって)配置されている。また、前述したように、本実施の形態では、ステアリングホイール16の最大操舵角が360°に設定されているため、ステアリングホイール16が最大操舵位置に操舵された状態においても、ステアリングシャフト14の周方向における第1連結軸60及び第2連結軸70の位置が一致する設定になっている。 Further, in the state where the steering wheel 16 is disposed at the neutral position (the state shown in FIG. 3), the positions of the first connecting shaft 60 and the second connecting shaft 70 in the circumferential direction of the steering shaft 14 are set to coincide with each other. Yes. In other words, at the neutral position of the steering wheel 16, the first connecting shaft 60 and the second connecting shaft 70 are disposed so as to overlap (overlap) when viewed from the axial direction of the steering shaft 14. Further, as described above, in the present embodiment, since the maximum steering angle of the steering wheel 16 is set to 360 °, even when the steering wheel 16 is steered to the maximum steering position, the circumference of the steering shaft 14 is increased. The positions of the first connecting shaft 60 and the second connecting shaft 70 in the direction are set to coincide with each other.
 第2連結軸70の先端部は、連結軸部70Aとされている。この連結軸部70Aには、円形状の「第2挿通孔」としてのワイヤ挿通孔72が径方向に貫通形成されており、ワイヤ挿通孔72は、ステアリングホイール16の中立位置において、ワイヤ挿通孔62と略同軸上に配置されている。このワイヤ挿通孔72は、第1連結軸60のワイヤ挿通孔62と、ステアリングシャフト14の軸方向において対称を成す形状に構成されている。すなわち、ワイヤ挿通孔72の軸方向両側の開口部には、面取部72A,72Bがそれぞれ形成されており、面取部72A,72Bは、第2連結軸70の縦断面視で、ワイヤ挿通孔72の軸方向両側へ向かうに従いワイヤ挿通孔72の径方向外側へ傾斜されている。すなわち、面取部72A,72Bは、傾斜面によって構成されると共に、ワイヤ挿通孔72の開口側へ末広がりとなる略円錐状に形成されている。 The distal end portion of the second connecting shaft 70 is a connecting shaft portion 70A. A wire insertion hole 72 as a circular “second insertion hole” is formed in the connecting shaft portion 70 </ b> A in a radial direction, and the wire insertion hole 72 is formed at the neutral position of the steering wheel 16. 62 and substantially coaxial. The wire insertion hole 72 is configured to be symmetrical with the wire insertion hole 62 of the first connecting shaft 60 in the axial direction of the steering shaft 14. That is, chamfered portions 72A and 72B are respectively formed in openings on both sides in the axial direction of the wire insertion hole 72, and the chamfered portions 72A and 72B are inserted through the wire in the longitudinal sectional view of the second connecting shaft 70. The wire 72 is inclined outward in the radial direction as it goes to both sides in the axial direction. That is, the chamfered portions 72 </ b> A and 72 </ b> B are configured by inclined surfaces and are formed in a substantially conical shape that spreads toward the opening side of the wire insertion hole 72.
 ワイヤ80は、複数の金属製の線材によって構成されると共に、可撓性を有する略長尺紐状(ロープ状)に形成されている。また、ワイヤ80は、断面略円形状に形成されており、ワイヤ80の径寸法が、第1連結軸60のワイヤ挿通孔62及び第2連結軸70のワイヤ挿通孔72の内径寸法よりも僅かに小さく設定されている。さらに、ワイヤ80の径寸法は、ステアリングシャフト14の径方向における隙間G1及び隙間G2の寸法よりも大きく設定されている。 The wire 80 is composed of a plurality of metal wires, and is formed in a substantially long string shape (rope shape) having flexibility. The wire 80 has a substantially circular cross section, and the diameter of the wire 80 is slightly smaller than the inner diameter of the wire insertion hole 62 of the first connection shaft 60 and the wire insertion hole 72 of the second connection shaft 70. Is set to a small value. Further, the diameter of the wire 80 is set larger than the dimensions of the gap G1 and the gap G2 in the radial direction of the steering shaft 14.
 このワイヤ80の長手方向両端部には、ストッパ82A、82B(広義には、「制限部材」として把握される要素である)が設けられており、ストッパ82A、82Bは、ワイヤ80の直径より大径の略球状(ボール状)に形成され、ワイヤ80に固定されている。具体的には、ストッパ82A、82Bには、図示しない孔部がワイヤ80の長手方向に貫通形成されており、ワイヤ80の長手方向両端部が当該孔部に挿通された状態で、ストッパ82A、82Bがカシメや溶接等によってワイヤ80に固定されている。そして、ワイヤ80の長手方向一方側の部分が、第1連結軸60のワイヤ挿通孔62内を挿通して、ワイヤ80が、第1連結軸60の面取部62Bから第2連結軸70側へ延出されている。一方、ワイヤ80の長手方向他方側の部分が、第2連結軸70のワイヤ挿通孔72内を挿通して、ワイヤ80が、第2連結軸70の面取部72Bから第1連結軸60側へ延出されている。また、ストッパ82Aはワイヤ挿通孔62の面取部62Aに嵌合可能に構成されており、ストッパ82Bはワイヤ挿通孔72の面取部72Aに嵌合可能に構成されている。これにより、第1連結軸60(ハウジング50)及び第2連結軸70(ステアリングシャフト14)が、ワイヤ80によって連結されている。 At both ends in the longitudinal direction of the wire 80, stoppers 82A and 82B (elements grasped as “restricting members” in a broad sense) are provided. The stoppers 82A and 82B are larger than the diameter of the wire 80. It is formed in a substantially spherical shape (ball shape) and is fixed to the wire 80. Specifically, in the stoppers 82A and 82B, holes (not shown) are formed so as to penetrate in the longitudinal direction of the wire 80, and the stoppers 82A and 82A, with both longitudinal ends of the wire 80 being inserted through the holes. 82B is fixed to the wire 80 by caulking, welding, or the like. A portion on one side in the longitudinal direction of the wire 80 is inserted through the wire insertion hole 62 of the first connecting shaft 60, and the wire 80 is connected to the second connecting shaft 70 side from the chamfered portion 62 </ b> B of the first connecting shaft 60. It is extended to. On the other hand, the portion on the other side in the longitudinal direction of the wire 80 is inserted through the wire insertion hole 72 of the second connecting shaft 70, and the wire 80 is connected to the first connecting shaft 60 side from the chamfered portion 72 </ b> B of the second connecting shaft 70. It is extended to. The stopper 82A is configured to be fitted into the chamfered portion 62A of the wire insertion hole 62, and the stopper 82B is configured to be fitted into the chamfered portion 72A of the wire insertion hole 72. Thus, the first connecting shaft 60 (housing 50) and the second connecting shaft 70 (steering shaft 14) are connected by the wire 80.
 そして、ステアリングホイール16が中立位置に配置された状態では、ワイヤ80が、第1連結軸60と第2連結軸70との間において、弛んだ状態となるように、ワイヤ80の長手方向の長さが設定されている(図3参照)。一方、ステアリングホイール16が中立位置から回動方向一方側又は他方側へ回動されて最大操舵位置に到達したときには、ワイヤ80がステアリングシャフト14の外周面に螺旋状に巻付けられるようになっている(図1参照)。具体的には、ワイヤ80が伸長した状態(ワイヤ80に長手方向外側への引張力が作用して、ワイヤ80が長手方向にぴんと張った状態)になるように、ワイヤ80の長手方向の長さが設定されている。より詳しくは、本実施の形態では、図1(B)に示されるように、ステアリングシャフト14の径方向外側から見て、ステアリングシャフト14の軸線14Lに対するワイヤ80の傾斜角αが、30°~60°となるように、ステアリングシャフト14の軸方向における第1連結軸60と第2連結軸70との間の距離と、ワイヤ80の長手方向の長さと、が設定されている。 In the state where the steering wheel 16 is disposed at the neutral position, the length of the wire 80 in the longitudinal direction is such that the wire 80 is in a slack state between the first connection shaft 60 and the second connection shaft 70. Is set (see FIG. 3). On the other hand, when the steering wheel 16 is turned from the neutral position to one side or the other side in the turning direction and reaches the maximum steering position, the wire 80 is spirally wound around the outer peripheral surface of the steering shaft 14. (See FIG. 1). Specifically, the length of the wire 80 in the longitudinal direction is such that the wire 80 is in an extended state (a state in which the wire 80 is tensioned in the longitudinal direction by applying a tensile force to the outside in the longitudinal direction). Is set. More specifically, in the present embodiment, as shown in FIG. 1B, the inclination angle α of the wire 80 with respect to the axis 14L of the steering shaft 14 is 30 ° to 30 ° when viewed from the radially outer side of the steering shaft 14. The distance between the first connecting shaft 60 and the second connecting shaft 70 in the axial direction of the steering shaft 14 and the length in the longitudinal direction of the wire 80 are set so as to be 60 °.
<作用及び効果について>
 上記のように構成されたステアリング装置10では、図3に示されるように、ステアリングホイール16の中立位置において、回動制限機構24のワイヤ80が、弛んだ状態で、第1連結軸60及び第2連結軸70を連結している。
<About action and effect>
In the steering device 10 configured as described above, as shown in FIG. 3, the first connecting shaft 60 and the first connecting shaft 60 and the first connecting shaft 60 are in a state in which the wire 80 of the rotation limiting mechanism 24 is loosened at the neutral position of the steering wheel 16. Two connecting shafts 70 are connected.
 そして、運転者によってステアリングホイール16が回動方向一方側(又は回動方向他方側)へ回動されると、ステアリングシャフト14が自身の軸回りを回動方向一方側(又は回動方向他方側)へ回動する。これにより、ステアリングシャフト14に固定された第2連結軸70が、ハウジング50に固定された第1連結軸60に対してステアリングシャフト14の周方向に相対回動する。このため、ワイヤ80のストッパ82B(すなわち長手方向他端部)が、ワイヤ80のストッパ82A(すなわち長手方向一端部)に対してステアリングシャフト14の軸回りに相対回動して、ワイヤ80がステアリングシャフト14の外周部に巻付くように作用する。換言すると、ステアリングシャフト14がワイヤ80を螺旋状に巻取るように作用する。 Then, when the steering wheel 16 is rotated to one side (or the other side in the rotation direction) by the driver, the steering shaft 14 rotates around its own axis on one side (or the other side in the rotation direction). ). Thereby, the second connecting shaft 70 fixed to the steering shaft 14 rotates relative to the first connecting shaft 60 fixed to the housing 50 in the circumferential direction of the steering shaft 14. For this reason, the stopper 82B (that is, the other end portion in the longitudinal direction) of the wire 80 is relatively rotated around the axis of the steering shaft 14 with respect to the stopper 82A (that is, one end portion in the longitudinal direction) of the wire 80, and the wire 80 is steered. It acts to wind around the outer periphery of the shaft 14. In other words, the steering shaft 14 acts to wind the wire 80 in a spiral shape.
 図1(A)及び(B)に示されるように、ステアリングホイール16が最大操舵位置に到達したときには、ストッパ82Aが第1連結軸60の面取部62Aに嵌合し、ストッパ82Bが第2連結軸70の面取部72Aに嵌合して、ワイヤ80が、伸長した状態で、ステアリングシャフト14の外周部に螺旋状に巻付けられる。これにより、ステアリングシャフト14が、伸長した状態のワイヤ80によって、ハウジング50に連結されるため、ステアリングシャフト14(すなわち、ステアリングホイール16)の回動方向一方側又は回動方向他方側の回動が制限される。以上により、回動制限機構24によってステアリングホイール16の回動を機械的に制限することができる。したがって、ステアリングホイール16の最大操舵位置において、反力モータ22によって発生するトルクによって、ステアリングホイール16の回動を制限する必要がなくなるため、反力モータ22の大型化を抑制することができる。 As shown in FIGS. 1A and 1B, when the steering wheel 16 reaches the maximum steering position, the stopper 82A is fitted into the chamfered portion 62A of the first connecting shaft 60, and the stopper 82B is second. The wire 80 is spirally wound around the outer peripheral portion of the steering shaft 14 in a state where the wire 80 is engaged with the chamfered portion 72A of the connecting shaft 70. Thereby, since the steering shaft 14 is connected to the housing 50 by the wire 80 in an extended state, the rotation of the steering shaft 14 (that is, the steering wheel 16) on one side of the rotation direction or the other side of the rotation direction is performed. Limited. As described above, the rotation of the steering wheel 16 can be mechanically limited by the rotation limiting mechanism 24. Therefore, since it is not necessary to limit the rotation of the steering wheel 16 by the torque generated by the reaction force motor 22 at the maximum steering position of the steering wheel 16, an increase in the size of the reaction force motor 22 can be suppressed.
 また、回動制限機構24では、可撓性を有するワイヤ80によってステアリングシャフト14とハウジング50とを連結して、最大操舵位置におけるステアリングシャフト14の回動を制限している。このため、回動制限機構24の第1連結軸60、第2連結軸70、及びワイヤ80を、既存のステアリング装置に追加することで、最大操舵位置におけるステアリングシャフト14の回動を制限することができる。これにより、簡易な構成で、最大操舵位置におけるステアリングホイール16の回動を制限することができる。さらに、ワイヤ80の長手方向の長さを適宜調整することで、ステアリングホイール16の最大操舵角を容易に設定することができる。 Further, in the rotation limiting mechanism 24, the steering shaft 14 and the housing 50 are connected by a flexible wire 80 to limit the rotation of the steering shaft 14 at the maximum steering position. For this reason, the rotation of the steering shaft 14 at the maximum steering position is limited by adding the first connecting shaft 60, the second connecting shaft 70, and the wire 80 of the rotation limiting mechanism 24 to the existing steering device. Can do. As a result, the rotation of the steering wheel 16 at the maximum steering position can be limited with a simple configuration. Furthermore, the maximum steering angle of the steering wheel 16 can be easily set by appropriately adjusting the length of the wire 80 in the longitudinal direction.
 また、第1連結軸60及び第2連結軸70(すなわち、ワイヤ80の長手方向両端部)が、ステアリングシャフト14の軸方向に離間して配置されており、上述のように、ステアリングホイール16の最大操舵位置では、ワイヤ80がステアリングシャフト14の外周部に螺旋状に巻付けられる。このため、ワイヤ80をステアリングシャフト14の径方向に層状に巻付ける構成と比べて、ステアリングシャフト14の径方向における回動制限機構24の体格を小型化することができると共に、ひいては、操舵装置12の体格を小型化することができる。 Further, the first connecting shaft 60 and the second connecting shaft 70 (that is, both ends in the longitudinal direction of the wire 80) are arranged apart from each other in the axial direction of the steering shaft 14, and as described above, At the maximum steering position, the wire 80 is spirally wound around the outer periphery of the steering shaft 14. Therefore, as compared with the configuration in which the wire 80 is wound in layers in the radial direction of the steering shaft 14, the physique of the rotation limiting mechanism 24 in the radial direction of the steering shaft 14 can be reduced in size. Can be downsized.
 さらに、ステアリングシャフト14の径方向における第1連結軸60とステアリングシャフト14との間の隙間G1が、ワイヤ80の径寸法と比べて小さく設定されている。このため、第1連結軸60から延出されたワイヤ80が、第1連結軸60とステアリングシャフト14との間を通過して(乗り越えて)、第1連結軸60に対してステアリングシャフト14の軸方向一方側に配置されることを抑制できる。また、ステアリングシャフト14の径方向における第2連結軸70とハウジング50との間の隙間G2の寸法が、ワイヤ80の径寸法と比べて小さく設定されている。このため、第2連結軸70から延出されたワイヤ80が、第2連結軸70とハウジング50との間を通過して(乗り越えて)、第2連結軸70に対してステアリングシャフト14の軸方向他方側に配置されることを抑制できる。したがって、ステアリングシャフト14の回動時において、ワイヤ80をステアリングシャフト14に良好に巻付けることができると共に、ワイヤ80の絡まりを抑制することができる。 Furthermore, the gap G 1 between the first connecting shaft 60 and the steering shaft 14 in the radial direction of the steering shaft 14 is set to be smaller than the radial dimension of the wire 80. For this reason, the wire 80 extended from the first connecting shaft 60 passes between the first connecting shaft 60 and the steering shaft 14 and gets over the first connecting shaft 60. Arrangement on one side in the axial direction can be suppressed. Further, the dimension of the gap G <b> 2 between the second connecting shaft 70 and the housing 50 in the radial direction of the steering shaft 14 is set to be smaller than the radial dimension of the wire 80. For this reason, the wire 80 extended from the second connection shaft 70 passes between the second connection shaft 70 and the housing 50 (overrides), and the axis of the steering shaft 14 with respect to the second connection shaft 70. Arrangement on the other side of the direction can be suppressed. Therefore, when the steering shaft 14 is rotated, the wire 80 can be wound well around the steering shaft 14 and the tangling of the wire 80 can be suppressed.
 また、第1連結軸60のワイヤ挿通孔62の開口部には、面取部62Bが形成されており、第2連結軸70のワイヤ挿通孔72の開口部には、面取部72Bが形成されている。そして、面取部62B(面取部72B)は、ワイヤ挿通孔62(ワイヤ挿通孔72)の開口側へ末広がりに傾斜した傾斜面によって構成されている。このため、仮に、第1連結軸60において面取部62Bを省略した場合及び第2連結軸70において面取部72Bを省略した場合と比べて、ワイヤ80の耐久性を向上することできる。 Further, a chamfered portion 62B is formed in the opening portion of the wire insertion hole 62 of the first connecting shaft 60, and a chamfered portion 72B is formed in the opening portion of the wire insertion hole 72 of the second connecting shaft 70. Has been. The chamfered portion 62B (chamfered portion 72B) is configured by an inclined surface that is inclined so as to widen toward the opening side of the wire insertion hole 62 (wire insertion hole 72). For this reason, the durability of the wire 80 can be improved as compared with the case where the chamfered portion 62B is omitted from the first connecting shaft 60 and the case where the chamfered portion 72B is omitted from the second connecting shaft 70.
 すなわち、ステアリングホイール16の最大操舵位置では、ワイヤ80がステアリングシャフト14に螺旋状に巻付けられる。このため、ワイヤ80が、第1連結軸60(第2連結軸70)の軸方向から見て、第1連結軸60(第2連結軸70)から斜め(具体的には、ステアリングシャフト14の軸方向他方側(軸方向一方側)へ向かうに従い、ステアリングシャフト14の径方向外側)に延出される状態になる。つまり、ワイヤ80が、第1連結軸60(第2連結軸70)のワイヤ挿通孔62(ワイヤ挿通孔72)の開口部を起点に、屈曲される。また、ステアリングホイール16は中立位置から回動方向一方側又は他方側へ回動されるため、ワイヤ80が、第1連結軸60(第2連結軸70)の軸方向から見て、第1連結軸60(第2連結軸70)のワイヤ挿通孔62(ワイヤ挿通孔72)の開口部を起点として、ステアリングシャフト14の軸線14Lに対して径方向両側へ繰り返し屈曲されるようになる。 That is, at the maximum steering position of the steering wheel 16, the wire 80 is spirally wound around the steering shaft 14. For this reason, the wire 80 is inclined (specifically, the steering shaft 14) from the first connection shaft 60 (second connection shaft 70) as viewed from the axial direction of the first connection shaft 60 (second connection shaft 70). As it goes to the other side in the axial direction (one side in the axial direction), it extends to the radially outer side of the steering shaft 14. That is, the wire 80 is bent starting from the opening of the wire insertion hole 62 (wire insertion hole 72) of the first connection shaft 60 (second connection shaft 70). Further, since the steering wheel 16 is rotated from the neutral position to the one side or the other side in the rotation direction, the wire 80 is seen from the axial direction of the first connection shaft 60 (second connection shaft 70). Starting from the opening of the wire insertion hole 62 (wire insertion hole 72) of the shaft 60 (second connecting shaft 70), the shaft 60 is repeatedly bent to both sides in the radial direction with respect to the axis 14L of the steering shaft 14.
 そして、仮に、第1連結軸60(第2連結軸70)において面取部62B(面取部72B)を省略した比較例の場合には、ワイヤ挿通孔62(ワイヤ挿通孔72)の開口端が、直角の角として構成される。これにより、当該比較例では、ワイヤ80が、ワイヤ挿通孔62(ワイヤ挿通孔72)の開口端の角によって折れ曲がり、当該角によってしごかれる可能性がある。その結果、比較例では、ワイヤ80における当該屈曲部が摩耗して、ワイヤ80の耐久性が低下する虞がある。 And in the case of the comparative example which abbreviate | omitted the chamfer 62B (chamfer 72B) in the 1st connection shaft 60 (2nd connection shaft 70), the opening end of the wire insertion hole 62 (wire insertion hole 72) Is configured as a right angle corner. Thereby, in the said comparative example, the wire 80 may be bent by the corner | angular of the opening end of the wire penetration hole 62 (wire penetration hole 72), and may be squeezed by the said corner | angular. As a result, in the comparative example, the bent portion of the wire 80 may be worn, and the durability of the wire 80 may be reduced.
 これに対して、本実施の形態では、第1連結軸60(第2連結軸70)に面取部62B(面取部72B)が形成されており、面取部62B(面取部72B)は、ワイヤ挿通孔62(ワイヤ挿通孔72)の開口側へ末広がりに傾斜した傾斜面によって構成されている。このため、上記比較例と比べて、ワイヤ挿通孔62(ワイヤ挿通孔72)から延出されたワイヤ80の急激な折れ曲がりを抑制することができると共に、ワイヤ80がワイヤ挿通孔62(ワイヤ挿通孔72)の面取部62B(面取部72B)によって過度にしごかれることを抑制できる。これにより、ワイヤ80の摩耗を抑制することができると共に、ワイヤ80の耐久性を向上することができる。 In contrast, in the present embodiment, a chamfer 62B (chamfer 72B) is formed on the first connecting shaft 60 (second connecting shaft 70), and the chamfer 62B (chamfer 72B). Is configured by an inclined surface that is inclined so as to widen toward the opening side of the wire insertion hole 62 (wire insertion hole 72). For this reason, compared with the said comparative example, while being able to suppress the rapid bending of the wire 80 extended from the wire insertion hole 62 (wire insertion hole 72), the wire 80 is connected to the wire insertion hole 62 (wire insertion hole). 72), it is possible to suppress excessive chamfering by the chamfered portion 62B (chamfered portion 72B). Thereby, wear of the wire 80 can be suppressed and durability of the wire 80 can be improved.
 次に、第1の実施の形態の回動制限機構24のバリエーションについて説明する。
(回動制限機構24のバリエーション1)
 図4(A)に示されるように、回動制限機構24のバリエーション1では、回動制限機構24が、複数(図4(A)に示されるバリエーション1の例では、2箇所)設けられている。具体的には、複数の回動制限機構24が、ステアリングシャフト14の周方向に所定の間隔を空けて配置されている。すなわち、ハウジング50には、2つの第1連結軸60が設けられており、第1連結軸60は、ハウジング50の周方向に180°離間して配置されている。また、ステアリングシャフト14には、2つの第2連結軸70が設けられており、第2連結軸70は、ステアリングシャフト14の周方向に180°離間して配置されている。そして、ステアリングホイール16の中立位置においてステアリングシャフト14の軸方向に重なる第1連結軸60及び第2連結軸70が対を成し、対を成す第1連結軸60及び第2連結軸70がワイヤ80によって連結されている。
Next, a variation of the rotation limiting mechanism 24 of the first embodiment will be described.
(Variation 1 of the rotation limiting mechanism 24)
As shown in FIG. 4A, in the variation 1 of the rotation limiting mechanism 24, a plurality of rotation limiting mechanisms 24 are provided (two in the example of the variation 1 shown in FIG. 4A). Yes. Specifically, a plurality of rotation limiting mechanisms 24 are arranged at predetermined intervals in the circumferential direction of the steering shaft 14. That is, the housing 50 is provided with two first connection shafts 60, and the first connection shafts 60 are arranged 180 degrees apart in the circumferential direction of the housing 50. The steering shaft 14 is provided with two second connecting shafts 70, and the second connecting shafts 70 are arranged 180 degrees apart in the circumferential direction of the steering shaft 14. The first connecting shaft 60 and the second connecting shaft 70 that overlap in the axial direction of the steering shaft 14 form a pair at the neutral position of the steering wheel 16, and the first connecting shaft 60 and the second connecting shaft 70 that form the pair are wires. 80 are connected.
 そして、この図に示されるように、ステアリングホイール16の最大操舵位置では、2本のワイヤ80が伸長された状態でステアリングシャフト14に巻付けられて、当該ワイヤ80によってステアリングシャフト14の回動が制限される。このため、バリエーション1では、ステアリングシャフト14の回動を制限するときにワイヤ80に作用する引張力を、第1の実施の形態と比べて低くすることができる。これにより、ワイヤ80の耐久性を一層向上することができる。 As shown in this figure, at the maximum steering position of the steering wheel 16, the two wires 80 are wound around the steering shaft 14 in an extended state, and the steering shaft 14 is rotated by the wires 80. Limited. For this reason, in the variation 1, the tensile force acting on the wire 80 when restricting the rotation of the steering shaft 14 can be made lower than that in the first embodiment. Thereby, the durability of the wire 80 can be further improved.
 また、バリエーション1では、回動制限機構24が、ステアリングシャフト14の周方向に複数設けられている。このため、ステアリングシャフト14の軸方向における回動制限機構24の大型化を抑制しつつ、ワイヤ80の耐久性を一層向上することができる。換言すると、ステアリングシャフト14の径方向における回動制限機構24の体格を維持しつつ、ワイヤ80の耐久性を一層向上することができる。 In Variation 1, a plurality of rotation limiting mechanisms 24 are provided in the circumferential direction of the steering shaft 14. For this reason, the durability of the wire 80 can be further improved while suppressing an increase in the size of the rotation limiting mechanism 24 in the axial direction of the steering shaft 14. In other words, the durability of the wire 80 can be further improved while maintaining the size of the rotation limiting mechanism 24 in the radial direction of the steering shaft 14.
(回動制限機構24のバリエーション2)
 バリエーション1では、回動制限機構24が、ステアリングシャフト14の周方向に複数設けられる構成にしたが、バリエーション2では、図4(B)に示されるように、回動制限機構24が、ステアリングシャフト14の軸方向に複数(図4(B)に示された例では、2箇所)設けられている。これにより、バリエーション2においても、ステアリングホイール16の最大操舵位置では、2本のワイヤ80が伸長された状態でステアリングシャフト14に巻付けられて、2本のワイヤ80によってステアリングシャフト14の回動が制限される。このため、バリエーション1と同様に、ステアリングシャフト14の回動を制限するときにワイヤ80に作用する引張力を、第1の実施の形態と比べて低くすることができる。これにより、ワイヤ80の耐久性を一層向上することができる。
(Variation 2 of the rotation limiting mechanism 24)
In the variation 1, a plurality of rotation restriction mechanisms 24 are provided in the circumferential direction of the steering shaft 14, but in the variation 2, the rotation restriction mechanism 24 is provided with the steering shaft as shown in FIG. A plurality (14 in the example shown in FIG. 4B) are provided in the 14 axial directions. Thereby, also in the variation 2, at the maximum steering position of the steering wheel 16, the two wires 80 are wound around the steering shaft 14 in an extended state, and the steering shaft 14 is rotated by the two wires 80. Limited. For this reason, similarly to the variation 1, the tensile force acting on the wire 80 when restricting the rotation of the steering shaft 14 can be made lower than that in the first embodiment. Thereby, the durability of the wire 80 can be further improved.
(回動制限機構24のバリエーション3)
 第1の実施の形態では、ワイヤ80の長手方向一端部が第1連結軸60に連結されており、ワイヤ80の長手方向他端部が第2連結軸70に連結されている。これに対して、バリエーション3では、図5に示されるように、ワイヤ80の長手方向両端部が、第1連結軸60及び第2連結軸70の一方(図5に示される例では、一対の第1連結軸60)に連結されており、ワイヤ80の長手方向中間部が第1連結軸60及び第2連結軸70の他方(図5に示される例では、第2連結軸70)に連結されている。これにより、ステアリングホイール16の最大操舵位置において、ワイヤ80の長手方向両端部に作用する荷重を分散(低く)することができると共に、ワイヤ80の長手方向両端部に連結された第1連結軸60又は第2連結軸70に作用する荷重を低くすることができる。これにより、バリエーション3においても、ワイヤ80の耐久性を一層向上することができる。
(Variation 3 of the rotation limiting mechanism 24)
In the first embodiment, one end portion in the longitudinal direction of the wire 80 is connected to the first connecting shaft 60, and the other end portion in the longitudinal direction of the wire 80 is connected to the second connecting shaft 70. On the other hand, in variation 3, as shown in FIG. 5, both ends in the longitudinal direction of the wire 80 are one of the first connecting shaft 60 and the second connecting shaft 70 (in the example shown in FIG. 5, a pair of The first connecting shaft 60) is connected, and the longitudinal intermediate portion of the wire 80 is connected to the other of the first connecting shaft 60 and the second connecting shaft 70 (in the example shown in FIG. 5, the second connecting shaft 70). Has been. Thereby, at the maximum steering position of the steering wheel 16, the load acting on both ends in the longitudinal direction of the wire 80 can be dispersed (lowered), and the first connecting shaft 60 connected to both ends in the longitudinal direction of the wire 80. Or the load which acts on the 2nd connecting shaft 70 can be made low. Thereby, also in the variation 3, the durability of the wire 80 can be further improved.
(第2の実施の形態)
 以下、図6(A)及び(B)を用いて、第2の実施の形態のステアリング装置100について説明する。ステアリング装置100では、操舵装置12における回動制限機構110を除いて第1の実施の形態と同様に構成されている。なお、図6(A)及び(B)では、回動制限機構110において、第1の実施の形態の回動制限機構24と同様に構成された部材には、同一の符号を付している。
(Second Embodiment)
Hereinafter, the steering device 100 according to the second embodiment will be described with reference to FIGS. The steering device 100 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 110 in the steering device 12. 6A and 6B, in the rotation limiting mechanism 110, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals. .
 第2の実施の形態の回動制限機構110では、第1連結軸60がハウジング50に回動可能に支持されており、第2連結軸70が、ステアリングシャフト14に回動可能に支持されている。以下、具体的に説明する。 In the rotation limiting mechanism 110 of the second embodiment, the first connection shaft 60 is rotatably supported by the housing 50, and the second connection shaft 70 is rotatably supported by the steering shaft 14. Yes. This will be specifically described below.
 図6(A)に示されるように、第2の実施の形態では、ハウジング50の固定部52の軸方向の長さが、第1の実施の形態と比べて長く設定されている。また、固定部52の先端部における略中央部には、固定部52の先端側へ開放された凹状の先端ザグリ部52Cが形成されており、先端ザグリ部52Cは、固定部52の先端側から見て一対の段差面52D(図6(A)の矢視a参照)を有する略円形状に形成されている。具体的には、先端ザグリ部52Cにおけるハウジング50の軸方向一方側の部分及び軸方向他方側の部分が、それぞれ略半円状に形成されており、先端ザグリ部52Cにおけるハウジング50の軸方向一方側(図6(A)の矢印A方向側)の部分の径寸法が、先端ザグリ部52Cにおけるハウジング50の軸方向他方側(図6(A)の矢印B方向側)の部分の径寸法よりも大きく設定されている。これにより、先端ザグリ部52Cの内周面には、一対の段差面52Dが形成されており、一対の段差面52Dは、ハウジング50の軸方向に直交する面に沿って配置されている。 As shown in FIG. 6 (A), in the second embodiment, the axial length of the fixing portion 52 of the housing 50 is set longer than that in the first embodiment. Further, a concave tip counterbore portion 52C that is open to the tip end side of the fixing portion 52 is formed at a substantially central portion of the tip end portion of the fixing portion 52. The tip counterbore portion 52C is formed from the tip end side of the fixing portion 52. It is formed in a substantially circular shape having a pair of step surfaces 52D (see arrow a in FIG. 6A). Specifically, the axially one side portion and the axially other side portion of the housing 50 at the tip counterbore portion 52C are each formed in a substantially semicircular shape, and one axial direction of the housing 50 at the tip counterbore portion 52C is formed. The diameter dimension of the portion on the side (arrow A direction side in FIG. 6A) is larger than the diameter dimension of the portion on the other side in the axial direction of the housing 50 (arrow B direction side in FIG. 6A) in the tip counterbore 52C. Is also set larger. Thus, a pair of stepped surfaces 52D are formed on the inner peripheral surface of the tip counterbore 52C, and the pair of stepped surfaces 52D are disposed along a surface orthogonal to the axial direction of the housing 50.
 さらに、第1連結軸60における取付軸部60Aの外径寸法が、固定部52の孔部52Bの内径寸法に比べて僅かに小さく設定されており、第1連結軸60が、孔部52B内に回動可能に挿入されている。第1連結軸60の取付軸部60Aは、第1の実施の形態に比べて、第1連結軸60の基端側(ハウジング50の径方向外側)へ延びており、第1連結軸60の基端が、固定部52の先端ザグリ部52Cの底面からハウジング50の径方向外側へ僅かに突出されている。また、第1連結軸60の基端部における軸心部には、第1連結軸60の基端側へ開放された凹状の固定孔60Dが形成されている。 Further, the outer diameter dimension of the mounting shaft portion 60A in the first connecting shaft 60 is set slightly smaller than the inner diameter size of the hole portion 52B of the fixed portion 52, and the first connecting shaft 60 is located in the hole portion 52B. It is inserted so that it can rotate. The mounting shaft portion 60A of the first connecting shaft 60 extends to the proximal end side (the radially outer side of the housing 50) of the first connecting shaft 60 as compared to the first embodiment. The base end slightly protrudes from the bottom surface of the tip counterbore part 52 </ b> C of the fixing part 52 to the radially outer side of the housing 50. A concave fixing hole 60 </ b> D that is open to the base end side of the first connection shaft 60 is formed in the shaft center portion at the base end portion of the first connection shaft 60.
 さらに、ハウジング50における固定部52の先端ザグリ部52C内には、第1抜止部材64が設けられており、第1抜止部材64は、第1連結軸60よりも大径の略円板状に形成されている。この第1抜止部材64の略中央部には、第1連結軸60側へ突出された軸部64Aが一体に形成されており、当該軸部64Aは、第1連結軸60の固定孔60Dに嵌入されている。これにより、第1抜止部材64が第1連結軸60に固定されて、第1抜止部材64が先端ザグリ部52Cの底面に当接されることで、第1連結軸60の先端側への移動が制限されている。以上により、第1連結軸60が、ハウジング50の径方向を軸方向としてハウジング50に回動可能に軸支されている(図6(A)の矢印参照)。 Further, a first retaining member 64 is provided in the tip counterbore portion 52 </ b> C of the fixing portion 52 in the housing 50, and the first retaining member 64 has a substantially disk shape larger in diameter than the first connecting shaft 60. Is formed. A shaft portion 64A that protrudes toward the first connecting shaft 60 is integrally formed at a substantially central portion of the first retaining member 64. The shaft portion 64A is formed in the fixing hole 60D of the first connecting shaft 60. It is inserted. As a result, the first retaining member 64 is fixed to the first connecting shaft 60, and the first retaining member 64 is brought into contact with the bottom surface of the tip counterbore 52C, whereby the first connecting shaft 60 moves toward the distal end side. Is limited. Thus, the first connecting shaft 60 is pivotally supported by the housing 50 so that the radial direction of the housing 50 is the axial direction (see the arrow in FIG. 6A).
 さらに、第1抜止部材64の外周部には、第1突起64Bが一体に形成されており、第1突起64Bは、第1抜止部材64の径方向外側(具体的には、ハウジング50の軸方向一方側)へ突出されている。この第1突起64Bは、先端ザグリ部52Cの一対の段差面52Dに当接可能に構成されており、第1突起64Bが段差面52Dに当接されることで、第1連結軸60の回動方向一方側又は回動方向他方側への回動が制限される構成になっている。そして、第1連結軸60の回動方向一方側又は回動方向他方側への回動許容範囲が、それぞれ略90°に設定されている。 Furthermore, a first protrusion 64B is integrally formed on the outer periphery of the first retaining member 64, and the first protrusion 64B is formed on the radially outer side of the first retaining member 64 (specifically, the shaft of the housing 50). Projecting in one direction). The first protrusion 64B is configured to be able to contact a pair of stepped surfaces 52D of the tip counterbore part 52C. The first protrusion 64B contacts the stepped surface 52D, so that the first connecting shaft 60 can rotate. The rotation is limited to one side in the movement direction or the other side in the rotation direction. And the permissible range of rotation of the first connecting shaft 60 toward one side of the rotation direction or the other side of the rotation direction is set to approximately 90 °.
 図6(B)に示されるように、ステアリングシャフト14には、第2連結軸70を回動可能に支持するための円形状の支持孔15が、ステアリングシャフト14の径方向に貫通形成されている。支持孔15の軸方向両側の開口部には、ステアリングシャフト14の径方向外側へ開放され且つ支持孔15よりも大径の第1ザグリ部15A及び第2ザグリ部15Bが形成されており、第1ザグリ部15A及び第2ザグリ部15Bの底面が支持孔15の軸方向に対して直交する方向に沿って配置されている。 As shown in FIG. 6B, the steering shaft 14 is formed with a circular support hole 15 for rotatably supporting the second connecting shaft 70 in the radial direction of the steering shaft 14. Yes. A first counterbore portion 15A and a second counterbore portion 15B that are open to the outside in the radial direction of the steering shaft 14 and have a larger diameter than the support hole 15 are formed in the openings on both axial sides of the support hole 15. The bottom surfaces of the first counterbore part 15 </ b> A and the second counterbore part 15 </ b> B are arranged along a direction orthogonal to the axial direction of the support hole 15.
 また、第2ザグリ部15Bは、ハウジング50の先端ザグリ部52Cと同様な形状を成している。すなわち、第2ザグリ部15Bにおけるハウジング50の軸方向一方側の部分及び軸方向他方側の部分が、それぞれ略半円状に形成されており、第2ザグリ部15Bにおけるハウジング50の軸方向一方側(図6(B)の矢印A方向側)の部分の径寸法が、第2ザグリ部15Bにおけるハウジング50の軸方向他方側(図6(B)の矢印B方向側)の部分の径寸法よりも大きく設定されている。そして、第2ザグリ部15Bの外周面には、一対の段差面15C(図6(B)の矢視b参照)が形成されており、一対の段差面15Cは、ステアリングシャフト14の軸方向に直交する面に沿って配置されている。 The second counterbore part 15B has the same shape as the tip counterbore part 52C of the housing 50. That is, the axially one side part and the axially other side part of the housing 50 in the second counterbore part 15B are each formed in a substantially semicircular shape, and the axially one side of the housing 50 in the second counterbore part 15B. The diameter dimension of the portion (arrow A direction side in FIG. 6B) is larger than the diameter dimension of the second counterbore portion 15B on the other axial side of the housing 50 (arrow B direction side in FIG. 6B). Is also set larger. A pair of stepped surfaces 15C (see arrow b in FIG. 6B) is formed on the outer peripheral surface of the second counterbore portion 15B, and the pair of stepped surfaces 15C extends in the axial direction of the steering shaft 14. It arrange | positions along the orthogonal surface.
 第2連結軸70は、第2連結軸70の先端部を構成する連結軸部70Aと、連結軸部70Aから第2連結軸70の基端側へ延出された略円柱状の本体軸部70Bと、を含んで構成されており、本体軸部70Bの外径寸法が連結軸部70Aの外径寸法に比べて小さく設定されている。そして、第2連結軸70の本体軸部70Bが、支持孔15内に挿入されて、第2連結軸70がステアリングシャフト14に回動可能に支持されている(図6(B)の矢印参照)。また、第2連結軸70の支持状態では、連結軸部70Aの一部が第1ザグリ部15Aに配置されると共に、本体軸部70Bの基端が、第2ザグリ部15B内へ僅かに突出された状態で配置されている。さらに、本体軸部70Bの基端部における軸心部には、第2連結軸70の基端側へ開放された凹状の固定孔70Cが形成されている。 The second connecting shaft 70 includes a connecting shaft portion 70 </ b> A that constitutes a distal end portion of the second connecting shaft 70, and a substantially columnar main body shaft portion that extends from the connecting shaft portion 70 </ b> A to the proximal end side of the second connecting shaft 70. 70B, and the outer diameter of the main body shaft portion 70B is set smaller than the outer diameter of the connecting shaft portion 70A. And the main-body shaft part 70B of the 2nd connection shaft 70 is inserted in the support hole 15, and the 2nd connection shaft 70 is rotatably supported by the steering shaft 14 (refer the arrow of FIG. 6 (B)). ). Further, in the support state of the second connecting shaft 70, a part of the connecting shaft portion 70A is disposed on the first counterbore portion 15A, and the base end of the main body shaft portion 70B slightly protrudes into the second counterbore portion 15B. It is arranged in the state. Furthermore, a concave fixing hole 70 </ b> C opened to the base end side of the second connecting shaft 70 is formed in the shaft center portion at the base end portion of the main body shaft portion 70 </ b> B.
 また、ステアリングシャフト14の第2ザグリ部15B内には、第2抜止部材74が設けられており、第2抜止部材74は本体軸部70Bよりも大径の略円板状に形成されている。この第2抜止部材74の略中央部には、第2連結軸70側へ突出された軸部74Aが一体に形成されており、当該軸部74Aが、第2連結軸70の固定孔70Cに嵌入されて、第2抜止部材74が第2連結軸70に固定されている。これにより、第2抜止部材74が第2ザグリ部15Bの底面に当接されて、第2連結軸70の先端側への移動が制限されている。以上により、第2連結軸70が、ステアリングシャフト14の径方向を軸方向としてハウジング50に軸支されている。 Further, a second retaining member 74 is provided in the second counterbore portion 15B of the steering shaft 14, and the second retaining member 74 is formed in a substantially disc shape having a larger diameter than the main body shaft portion 70B. . A shaft portion 74A that protrudes toward the second connecting shaft 70 is integrally formed at a substantially central portion of the second retaining member 74, and the shaft portion 74A is formed in the fixing hole 70C of the second connecting shaft 70. The second retaining member 74 is fixed to the second connecting shaft 70 by being inserted. As a result, the second retaining member 74 is brought into contact with the bottom surface of the second counterbore portion 15B, and the movement of the second connecting shaft 70 toward the distal end side is restricted. As described above, the second connecting shaft 70 is pivotally supported by the housing 50 with the radial direction of the steering shaft 14 as the axial direction.
 さらに、第2抜止部材74の外周部には、第2突起74Bが一体に形成されており、第2突起74Bは、第2抜止部材74の径方向外側(具体的には、ステアリングシャフト14の軸方向一方側)へ突出されている。この第2突起74Bは、第2ザグリ部15Bの一対の段差面15Cに当接可能に構成されており、第2突起74Bが段差面15Cに当接されることで、第2連結軸70の回動方向一方側又は回動方向他方側への回動が制限される構成になっている。そして、第2連結軸70の回動方向一方側又は回動方向他方側への回動許容範囲が、それぞれ略90°に設定されている。 Further, a second protrusion 74B is integrally formed on the outer periphery of the second retaining member 74, and the second protrusion 74B is formed on the radially outer side of the second retaining member 74 (specifically, the steering shaft 14). It protrudes in one axial direction. The second protrusions 74B are configured to be able to contact the pair of stepped surfaces 15C of the second counterbore part 15B, and the second protrusions 74B are in contact with the stepped surfaces 15C. The rotation is limited to one side of the rotation direction or the other side of the rotation direction. And the permissible range of rotation of the second connecting shaft 70 toward one side of the rotation direction or the other side of the rotation direction is set to approximately 90 °.
 ここで、図示は省略するが、第2の実施の形態においても、運転者によってステアリングホイール16が回動されて最大操舵位置に到達したときには、ストッパ82Aが第1連結軸60の面取部62Aに嵌合し、ストッパ82Bが第2連結軸70の面取部72Aに嵌合して、ワイヤ80が、伸長した状態で、ステアリングシャフト14の外周部に螺旋状に巻付けられる。これにより、伸長した状態のワイヤ80によって、ステアリングシャフト14がハウジング50に連結されるため、ステアリングシャフト14(ステアリングホイール16)の回動方向一方側又は他方側の回動が制限される。したがって、第2の実施の形態においても、第1の実施の形態と同様の作用及び効果を奏することができる。 Although illustration is omitted here, also in the second embodiment, when the steering wheel 16 is rotated by the driver and reaches the maximum steering position, the stopper 82A is chamfered 62A of the first connecting shaft 60. The stopper 82B is fitted to the chamfered portion 72A of the second connecting shaft 70, and the wire 80 is spirally wound around the outer peripheral portion of the steering shaft 14 in an extended state. Thereby, since the steering shaft 14 is connected to the housing 50 by the extended wire 80, the rotation of the steering shaft 14 (steering wheel 16) on one side or the other side is restricted. Therefore, also in the second embodiment, the same operations and effects as those in the first embodiment can be achieved.
 また、第2の実施の形態では、第1連結軸60がハウジング50に回動可能に支持されており、第2連結軸70が、ステアリングシャフト14に回動可能に支持されている。このため、ステアリングシャフト14の回動時には、第1連結軸60(第2連結軸70)が、ワイヤ80の第1連結軸60(第2連結軸70)からの延出方向に追従して、自身の軸回りを回動する。その結果、ステアリングホイール16が最大操舵位置に到達したときにおける、ワイヤ80の折れ曲がりを一層抑制することができると共に、ワイヤ80がワイヤ挿通孔62(ワイヤ挿通孔72)の面取部62B(面取部72B)によって過度にしごかれることを一層抑制できる。これにより、ワイヤ80の摩耗を一層抑制することができると共に、ひいてはワイヤ80の耐久性を一層向上することができる。 In the second embodiment, the first connecting shaft 60 is rotatably supported by the housing 50, and the second connecting shaft 70 is rotatably supported by the steering shaft 14. For this reason, when the steering shaft 14 rotates, the first connecting shaft 60 (second connecting shaft 70) follows the extending direction of the wire 80 from the first connecting shaft 60 (second connecting shaft 70). Rotate around its own axis. As a result, the bending of the wire 80 when the steering wheel 16 reaches the maximum steering position can be further suppressed, and the wire 80 can be chamfered 62B (chamfered) of the wire insertion hole 62 (wire insertion hole 72). It is possible to further suppress excessive squeezing by the portion 72B). Thereby, the wear of the wire 80 can be further suppressed, and the durability of the wire 80 can be further improved.
 さらに、第1連結軸60には、第1抜止部材64が固定されており、第1抜止部材64の第1突起64Bが、ハウジング50における固定部52の段差面52Dに当接可能に構成されている。また、第2連結軸70には、第2抜止部材74が固定されており、第2抜止部材74の第2突起74Bが、ステアリングシャフト14における第2ザグリ部15Bの段差面15Cに当接可能に構成されている。これにより、第1連結軸60(第2連結軸70)の回動範囲が、段差面52D(段差面15C)によって制限される。このため、第1連結軸60から延出されたワイヤ80が、第1連結軸60に対してステアリングシャフト14の軸方向一方側に配置されることを抑制できる。また、第2連結軸70から延出されたワイヤ80が、第2連結軸70に対してステアリングシャフト14の軸方向他方側に配置されることを抑制できる。したがって、第1連結軸60及び第2連結軸70を自身の軸回りに回動可能に構成した場合でも、ワイヤ80を第1連結軸60及び第2連結軸70の間に安定して配置することができる。その結果、ステアリングシャフト14の回動時に、ワイヤ80をステアリングシャフト14に良好に巻付けることができると共に、ワイヤ80の絡まりを抑制することができる。 Further, a first retaining member 64 is fixed to the first connecting shaft 60, and the first protrusion 64 </ b> B of the first retaining member 64 can be brought into contact with a step surface 52 </ b> D of the fixing portion 52 in the housing 50. ing. Further, a second retaining member 74 is fixed to the second connecting shaft 70, and the second protrusion 74B of the second retaining member 74 can come into contact with the step surface 15C of the second counterbore portion 15B of the steering shaft 14. It is configured. Thereby, the rotation range of the first connecting shaft 60 (second connecting shaft 70) is limited by the step surface 52D (step surface 15C). For this reason, it can suppress that the wire 80 extended from the 1st connection shaft 60 is arrange | positioned with respect to the 1st connection shaft 60 at the axial direction one side of the steering shaft 14. FIG. In addition, it is possible to suppress the wire 80 extending from the second connecting shaft 70 from being disposed on the other side in the axial direction of the steering shaft 14 with respect to the second connecting shaft 70. Therefore, even when the first connecting shaft 60 and the second connecting shaft 70 are configured to be rotatable around their own axes, the wire 80 is stably disposed between the first connecting shaft 60 and the second connecting shaft 70. be able to. As a result, when the steering shaft 14 is rotated, the wire 80 can be satisfactorily wound around the steering shaft 14 and the tangling of the wire 80 can be suppressed.
 なお、第2の実施の形態では、第1連結軸60及び第2連結軸70が、自身の軸回りに回動可能に構成されている。これに代えて、第1連結軸60及び第2連結軸70の一方を、自身の軸回りに回動可能に構成してもよい。例えば、第2連結軸70をステアリングシャフト14によって回動可能に支持するように構成して、ワイヤ80の長手方向一端部をハウジング50に以下のように連結してもよい。 In the second embodiment, the first connecting shaft 60 and the second connecting shaft 70 are configured to be rotatable about their own axes. Instead of this, one of the first connecting shaft 60 and the second connecting shaft 70 may be configured to be rotatable about its own axis. For example, the second connecting shaft 70 may be configured to be rotatably supported by the steering shaft 14, and one end in the longitudinal direction of the wire 80 may be connected to the housing 50 as follows.
 すなわち、図7(A)に示されるように、ハウジング50において固定部52及び第1連結軸60を省略すると共に、ハウジング50に「挿通孔」としてのワイヤ挿通孔50Aを形成して、ワイヤ挿通孔50A内にワイヤ80を挿通させる。また、ワイヤ80のストッパ82Aを、ハウジング50の外周部におけるワイヤ挿通孔50Aの周縁部に溶接等によって固定する。このため、第2の実施の形態に比べて、ストッパ82Aをステアリングシャフト14に対して径方向外側に離間して配置することができる。これにより、ステアリングホイール16の最大操舵位置において、ストッパ82Aから延出されるワイヤ80の過度の折れ曲がりを抑制することができる。したがって、この場合においても、ワイヤ80の耐久性を向上することができる。 That is, as shown in FIG. 7A, the fixing portion 52 and the first connecting shaft 60 are omitted from the housing 50, and a wire insertion hole 50 </ b> A as an “insertion hole” is formed in the housing 50. The wire 80 is inserted into the hole 50A. Further, the stopper 82 </ b> A of the wire 80 is fixed to the peripheral portion of the wire insertion hole 50 </ b> A in the outer peripheral portion of the housing 50 by welding or the like. For this reason, as compared with the second embodiment, the stopper 82 </ b> A can be arranged to be spaced radially outward with respect to the steering shaft 14. Thereby, at the maximum steering position of the steering wheel 16, excessive bending of the wire 80 extending from the stopper 82A can be suppressed. Accordingly, even in this case, the durability of the wire 80 can be improved.
 なお、図7(A)に示される例において、ワイヤ挿通孔50Aにおけるハウジング50の内周面側の開口部に、第1連結軸60の面取部62Bと同様の面取部50Bを形成してもよい。すなわち、ワイヤ挿通孔50Aにおけるハウジング50の内周面側の開口部を、ハウジング50の径方向内側へ向かうに従いワイヤ挿通孔50Aの径方向外側へ傾斜された傾斜面によって構成してもよい。これにより、ワイヤ挿通孔50Aにおけるハウジング50の内周面側の開口部と、ワイヤ80と、の当接が抑制されるため、ワイヤ80の磨耗を効果的に抑制することができると共に、ワイヤ80の耐久性を効果的に向上することができる。 In the example shown in FIG. 7A, a chamfered portion 50B similar to the chamfered portion 62B of the first connecting shaft 60 is formed in the opening on the inner peripheral surface side of the housing 50 in the wire insertion hole 50A. May be. That is, the opening on the inner peripheral surface side of the housing 50 in the wire insertion hole 50 </ b> A may be configured by an inclined surface that is inclined outward in the radial direction of the wire insertion hole 50 </ b> A as it goes inward in the radial direction of the housing 50. Thereby, since the contact of the wire 80 with the opening on the inner peripheral surface side of the housing 50 in the wire insertion hole 50A and the wire 80 is suppressed, the wear of the wire 80 can be effectively suppressed, and the wire 80 can be effectively suppressed. The durability can be effectively improved.
 また、第2の実施の形態では、第1連結軸60及び第2連結軸70を自身の軸回りに回動可能に構成して、ワイヤ80の折れ曲がりを抑制しているが、ワイヤ80の折れ曲がりを抑制する構造はこれに限らない。例えば、ワイヤ80とハウジング50及びステアリングシャフト14との連結構造を、所謂ボールジョイントによって連結してもよい。以下、この構造について、ワイヤ80とステアリングシャフト14との連結を用いて説明する。 Further, in the second embodiment, the first connecting shaft 60 and the second connecting shaft 70 are configured to be rotatable around their own axes to suppress the bending of the wire 80. However, the bending of the wire 80 is suppressed. The structure which suppresses is not restricted to this. For example, the connection structure of the wire 80, the housing 50, and the steering shaft 14 may be connected by a so-called ball joint. Hereinafter, this structure will be described using the connection between the wire 80 and the steering shaft 14.
 すなわち、図7(B)に示されるように、ステアリングシャフト14には、ステアリングシャフト14の径方向外側へ開放された連結凹部14Aが形成されており、連結凹部14Aは、ストッパ82Bよりも小径の断面円形状に形成されている。また、ステアリングシャフト14の外周面には、連結凹部14Aに対して軸方向他方側(図7(B)の矢印B方側)の位置において、略円柱状のボス14Bがステアリングシャフト14の径方向外側へ向けて立設されている。このボス14Bの先端部には、ステアリングシャフト14の径方向外側へ開放された凹状のネジ部14B1が形成されている。なお、ボス14Bは、ステアリングシャフト14に一体に設けられていてもよいし、ステアリングシャフト14とは別体に構成されて、ステアリングシャフト14に固定されてもよい。 That is, as shown in FIG. 7B, the steering shaft 14 is formed with a connecting recess 14A that is opened radially outward of the steering shaft 14, and the connecting recess 14A has a smaller diameter than the stopper 82B. The cross section is formed in a circular shape. Further, on the outer peripheral surface of the steering shaft 14, a substantially cylindrical boss 14 </ b> B is provided in the radial direction of the steering shaft 14 at a position on the other axial side with respect to the connecting recess 14 </ b> A (arrow B direction in FIG. 7B). Stands outward. A concave threaded portion 14B1 that is opened to the radially outer side of the steering shaft 14 is formed at the tip of the boss 14B. The boss 14B may be provided integrally with the steering shaft 14, or may be configured separately from the steering shaft 14 and fixed to the steering shaft 14.
 また、ボス14Bの先端側には、略矩形プレート状の連結プレート76が設けられており、連結プレート76は、ステアリングシャフト14の径方向を板厚方向として、ボス14B及び連結凹部14Aに対向して配置されている。連結プレート76には、取付孔76Aが貫通形成されており、取付孔76Aは、ボス14Bのネジ部14B1と同軸上に配置されている。そして、取付孔76A内に固定ボルトB1が挿入されて、固定ボルトB1がネジ部14B1に螺合されることで、連結プレート76がボス14B(すなわち、ステアリングシャフト14)に固定されている。また、連結プレート76における連結凹部14Aに対向する部位には、略円形状の連結孔76Bが貫通形成されており、連結孔76Bは、ストッパ82Bよりも小径に設定されている。 Further, a connecting plate 76 having a substantially rectangular plate shape is provided on the tip side of the boss 14B, and the connecting plate 76 faces the boss 14B and the connecting recess 14A with the radial direction of the steering shaft 14 as the plate thickness direction. Are arranged. An attachment hole 76A is formed through the connection plate 76, and the attachment hole 76A is disposed coaxially with the screw portion 14B1 of the boss 14B. Then, the fixing bolt B1 is inserted into the mounting hole 76A, and the fixing bolt B1 is screwed into the screw portion 14B1, whereby the connecting plate 76 is fixed to the boss 14B (that is, the steering shaft 14). In addition, a substantially circular connecting hole 76B is formed through the portion of the connecting plate 76 that faces the connecting recess 14A, and the connecting hole 76B is set to have a smaller diameter than the stopper 82B.
 そして、ストッパ82Bが、ステアリングシャフト14の連結凹部14A内及び連結プレート76の連結孔76B内に嵌り込んだ状態で、ステアリングシャフト14及び連結プレート76によって挟み込まれている。これにより、ストッパ82Bが、連結凹部14A及び連結孔76Bの開口縁部上を摺動するように、ワイヤ80とステアリングシャフト14とが、ボールジョイントによって連結されている。これにより、ステアリングホイール16が最大操舵位置に到達したときには、ワイヤ80のストッパ82Bからの引出方向に追従して、ストッパ82Bが、連結凹部14A及び連結孔76Bの開口縁部上を摺動しながら、自身の中心点を中心に回動する。このため、ストッパ82Bから延出されたワイヤ80の急激な折れ曲がりを一層抑制することができる。 The stopper 82B is sandwiched between the steering shaft 14 and the connecting plate 76 in a state where the stopper 82B is fitted in the connecting recess 14A of the steering shaft 14 and the connecting hole 76B of the connecting plate 76. Thereby, the wire 80 and the steering shaft 14 are connected by the ball joint so that the stopper 82B slides on the opening edge of the connection recess 14A and the connection hole 76B. Thus, when the steering wheel 16 reaches the maximum steering position, the stopper 82B follows the direction in which the wire 80 is pulled out from the stopper 82B, and the stopper 82B slides on the opening edge of the coupling recess 14A and the coupling hole 76B. Rotate around its own center point. For this reason, the rapid bending of the wire 80 extended from the stopper 82B can be further suppressed.
(第3の実施の形態)
 以下、図8(A)及び(B)を用いて、第3の実施の形態のステアリング装置200について説明する。ステアリング装置200では、操舵装置12における回動制限機構210を除いて第1の実施の形態と同様に構成されている。なお、図8(A)及び(B)では、回動制限機構210において、第1の実施の形態の回動制限機構24と同様に構成された部材には、同一の符号を付している。
(Third embodiment)
Hereinafter, the steering device 200 according to the third embodiment will be described with reference to FIGS. The steering device 200 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 210 in the steering device 12. 8A and 8B, in the rotation limiting mechanism 210, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals. .
 第3の実施の形態の回動制限機構210では、第1連結軸60において面取部62Aが省略されている。また、ワイヤ80には、「付勢部材」としての圧縮コイルばね212が装着されており、圧縮コイルばね212は、ストッパ82Aと、第1連結軸60(の連結軸部60B)と、の間に配置されている。これにより、ストッパ82Aが、圧縮コイルばね212の付勢力によって、第1連結軸60から離間される方向(詳しくは、ハウジング50の軸方向一方側であり、図8(A)の矢印A方向側)へ付勢されている。 In the rotation restricting mechanism 210 of the third embodiment, the chamfered portion 62A is omitted from the first connecting shaft 60. The wire 80 is provided with a compression coil spring 212 as an “urging member”. The compression coil spring 212 is provided between the stopper 82A and the first connection shaft 60 (the connection shaft portion 60B). Is arranged. Accordingly, the stopper 82A is separated from the first connecting shaft 60 by the urging force of the compression coil spring 212 (specifically, one side in the axial direction of the housing 50, and the direction in the direction of arrow A in FIG. 8A). ).
 また、ハウジング50には、ストッパ82Aに対してハウジング50の軸方向一方側(図8の矢印A方向側)の位置において、「保持部」としての保持壁50Cが一体に形成されており、保持壁50Cは、ハウジング50の軸方向を板厚方向としてハウジング50から径方向内側へ突出されている。そして、図8(A)に示されるように、ステアリングホイール16の中立位置では、圧縮コイルばね212が自然状態から若干圧縮変形した状態でストッパ82Aを押圧して、ストッパ82Aが保持壁50Cに当接されている。これにより、ストッパ82Aにおけるハウジング50の軸方向一方側への移動が制限されて、ストッパ82Aが保持壁50Cによって保持されている。また、第3の実施の形態では、第1の実施の形態と比べて、ワイヤ80の長手方向の長さが、圧縮コイルばね212の密着長さ(圧縮コイルばね212の圧縮変形が完了して、コイル同士が密着された状態の長さ)だけ長く設定されている。 In addition, the housing 50 is integrally formed with a holding wall 50C as a “holding portion” at a position on one side in the axial direction of the housing 50 with respect to the stopper 82A (arrow A direction side in FIG. 8). The wall 50C protrudes radially inward from the housing 50 with the axial direction of the housing 50 as the plate thickness direction. As shown in FIG. 8A, at the neutral position of the steering wheel 16, the compression coil spring 212 presses the stopper 82A in a state where the compression coil spring 212 is slightly compressed and deformed from the natural state, and the stopper 82A contacts the holding wall 50C. It is touched. Accordingly, the movement of the stopper 82A toward the one side in the axial direction of the housing 50 is restricted, and the stopper 82A is held by the holding wall 50C. In the third embodiment, the length of the wire 80 in the longitudinal direction is equal to the contact length of the compression coil spring 212 (compression deformation of the compression coil spring 212 is completed as compared with the first embodiment. , The length of the state in which the coils are in close contact with each other).
 そして、第3の実施の形態では、運転者によってステアリングホイール16が中立位置から回動方向一方側又は他方側へ回動されると、第1の実施の形態と同様に、ワイヤ80がステアリングシャフト14に巻付けられる。そして、ステアリングホイール16が最大操舵位置の手前に到達したときに、ワイヤ80が伸長された状態になり、圧縮コイルばね212の付勢力が、ストッパ82A,82Bを含むワイヤ80を介して、ステアリングシャフト14(第2連結軸70)に作用する。この状態からステアリングホイール16を、回動方向一方側又は他方側へさらに回動させると、ステアリングシャフト14(第2連結軸70)が、圧縮コイルばね212の付勢力に抗して、ワイヤ80(のストッパ82B)を長手方向他方側(図8(A)の矢印B方向側)へ引張る。これにより、ストッパ82Aが、保持壁50Cからハウジング50の軸方向他方側へ離間して、ワイヤ80がステアリングシャフト14にさらに巻付けられる。そして、図8(B)に示されるように、ステアリングホイール16の最大操舵位置では、圧縮コイルばね212の圧縮変形が完了して、ストッパ82Aにおけるハウジング50の軸方向他方側への移動が、第1連結軸60及び圧縮コイルばね212によって制限される。これにより、ステアリングシャフト14(ステアリングホイール16)の回動が制限される。したがって、第3の実施の形態においても、第1の実施の形態と同様の作用及び効果を奏することができる。 In the third embodiment, when the steering wheel 16 is rotated from the neutral position to one side or the other side by the driver, the wire 80 is connected to the steering shaft as in the first embodiment. 14 is wound around. When the steering wheel 16 reaches the position before the maximum steering position, the wire 80 is extended, and the biasing force of the compression coil spring 212 is applied to the steering shaft via the wire 80 including the stoppers 82A and 82B. 14 (second connecting shaft 70). When the steering wheel 16 is further rotated from this state to one side or the other side in the rotation direction, the steering shaft 14 (second connecting shaft 70) resists the urging force of the compression coil spring 212 and the wire 80 ( The stopper 82B) is pulled to the other side in the longitudinal direction (the arrow B direction side in FIG. 8A). Accordingly, the stopper 82A is separated from the holding wall 50C to the other axial side of the housing 50, and the wire 80 is further wound around the steering shaft 14. As shown in FIG. 8B, at the maximum steering position of the steering wheel 16, the compression deformation of the compression coil spring 212 is completed, and the movement of the stopper 82A toward the other side in the axial direction of the housing 50 is the first. Limited by one connecting shaft 60 and compression coil spring 212. Thereby, rotation of the steering shaft 14 (steering wheel 16) is restricted. Therefore, also in the third embodiment, the same operations and effects as those in the first embodiment can be achieved.
 また、第3の実施の形態では、上述のように、ステアリングホイール16の最大操舵位置の手前から最大操舵位置への回動時には、圧縮コイルばね212の付勢力に抗して、ステアリングホイール16を回動させる必要がある。このため、ステアリングホイール16における当該手前位置から最大操舵位置までの操舵力を高くすることができる。これにより、ステアリングホイール16の最大操舵位置への到達(すなわち、ステアリングホイール16の最大操舵角)を、運転者に認知させることができる。したがって、運転者に対する操作性及び利便性を向上することができる。 In the third embodiment, as described above, when the steering wheel 16 is rotated from the front of the maximum steering position to the maximum steering position, the steering wheel 16 is moved against the urging force of the compression coil spring 212. It is necessary to rotate. For this reason, the steering force from the front position to the maximum steering position in the steering wheel 16 can be increased. Accordingly, the driver can be made aware of the arrival of the steering wheel 16 at the maximum steering position (that is, the maximum steering angle of the steering wheel 16). Therefore, the operability and convenience for the driver can be improved.
 さらに、第3の実施の形態では、保持壁50Cがハウジング50に形成されており、圧縮コイルばね212によって第1連結軸60に対して離間される方向へ付勢されたストッパ82Aが、保持壁50Cによって保持されている。このため、圧縮コイルばね212をワイヤ80に設けても、圧縮コイルばね212及びストッパ82Aのハウジング50に対する相対変位を抑制することができる。これにより、例えば、圧縮コイルばね212と第1連結軸60との間やストッパ82Aとハウジング50との間で生じる異音の発生を抑制することができる。 Furthermore, in the third embodiment, the holding wall 50C is formed in the housing 50, and the stopper 82A biased in the direction away from the first connecting shaft 60 by the compression coil spring 212 is provided with the holding wall. Held by 50C. For this reason, even if the compression coil spring 212 is provided on the wire 80, relative displacement of the compression coil spring 212 and the stopper 82A with respect to the housing 50 can be suppressed. Thereby, for example, it is possible to suppress the generation of abnormal noise that occurs between the compression coil spring 212 and the first connecting shaft 60 or between the stopper 82 </ b> A and the housing 50.
 また、上述のように、圧縮コイルばね212が、ワイヤ80の長手方向一方側の端部に装着されて、第1連結軸60とストッパ82Aとの間に配置されている。すなわち、固定側のワイヤ80の長手方向一方側の端部に、圧縮コイルばね212を設けた構成になっている。これにより、ステアリングホイール16の操舵時におけるストッパ82Aに対する保持状態を安定化することができる。 Also, as described above, the compression coil spring 212 is attached to the end portion on one side in the longitudinal direction of the wire 80 and is disposed between the first connecting shaft 60 and the stopper 82A. That is, the compression coil spring 212 is provided at one end in the longitudinal direction of the wire 80 on the fixed side. Thereby, the holding | maintenance state with respect to the stopper 82A at the time of steering of the steering wheel 16 can be stabilized.
 すなわち、例えば、ワイヤ80の長手方向他方側の端部に圧縮コイルばね212を設けると共に、ステアリングシャフト14に保持壁50Cを設けた場合には、保持壁50Cがステアリングシャフト14と共にステアリングホイール16の操舵によって回動(可動)する。このため、ストッパ82Bが保持壁50Cに対してずれて、ストッパ82Bの保持状態の安定性が低下する虞がある。これに対して、本実施の形態では、上述のように、固定側のワイヤ80の長手方向一方側の端部に圧縮コイルばね212を設けると共に、ハウジング50に保持壁50Cを設けている。これにより、ステアリングシャフト14の回動時には保持壁50Cがステアリングシャフト14と共に回動しないため、ステアリングシャフト14が回動することによるストッパ82Aの保持状態への影響を抑制できる。したがって、ステアリングホイール16の回動時におけるストッパ82Aに対する保持状態を安定化することができる。 That is, for example, when the compression coil spring 212 is provided at the end of the wire 80 on the other side in the longitudinal direction and the holding wall 50C is provided on the steering shaft 14, the holding wall 50C and the steering shaft 14 steer the steering wheel 16. To rotate (movable). For this reason, the stopper 82B may be displaced with respect to the holding wall 50C, and the stability of the holding state of the stopper 82B may be reduced. On the other hand, in the present embodiment, as described above, the compression coil spring 212 is provided at the end portion on the one side in the longitudinal direction of the wire 80 on the fixed side, and the holding wall 50C is provided on the housing 50. Accordingly, since the holding wall 50C does not rotate together with the steering shaft 14 when the steering shaft 14 rotates, the influence on the holding state of the stopper 82A due to the rotation of the steering shaft 14 can be suppressed. Therefore, the holding state with respect to the stopper 82A when the steering wheel 16 is rotated can be stabilized.
 なお、第3の実施の形態では、ワイヤ80に装着された圧縮コイルばね212が、第1連結軸60とストッパ82Aとの間に配置されている。これに代えて、圧縮コイルばね212を、第2連結軸70とストッパ82Bとの間に配置するように構成してもよい。 In the third embodiment, the compression coil spring 212 attached to the wire 80 is disposed between the first connecting shaft 60 and the stopper 82A. Instead of this, the compression coil spring 212 may be arranged between the second connecting shaft 70 and the stopper 82B.
 また、第3の実施の形態では、ワイヤ80に単数の圧縮コイルばねを設ける構成にしたが、ワイヤ80に、複数の圧縮コイルばねを設ける構成にしてもよい。例えば、第1連結軸60とストッパ82Aとの間、及び、第2連結軸70とストッパ82Bとの間に、圧縮コイルばねを設けてもよい。この場合には、ステアリングシャフト14にも、保持壁50Cを設けてもよい。また、例えば、第1連結軸60とストッパ82Aとの間に、複数の圧縮コイルばねをハウジング50の軸方向に並ぶように配置してもよい。これにより、例えば、第3の実施の形態に比べて、圧縮コイルばねのばね荷重を低く設定することができる。また、ワイヤ80の長手方向両端部に圧縮コイルばねを配置する場合には、ストッパ82A,82Bを保持壁50Cによって保持することができる。これにより、ワイヤ80の伸長前において、ストッパ82A,82Bの保持状態を安定化することができる。その結果、ストッパ82A,82Bがハウジング50やステアリングシャフト14に当ることによって生じる異音を抑制することができる。 In the third embodiment, the wire 80 is provided with a single compression coil spring, but the wire 80 may be provided with a plurality of compression coil springs. For example, a compression coil spring may be provided between the first connecting shaft 60 and the stopper 82A and between the second connecting shaft 70 and the stopper 82B. In this case, the steering shaft 14 may also be provided with a holding wall 50C. Further, for example, a plurality of compression coil springs may be arranged in the axial direction of the housing 50 between the first connecting shaft 60 and the stopper 82A. Thereby, compared with 3rd Embodiment, the spring load of a compression coil spring can be set low, for example. Further, when the compression coil springs are arranged at both ends in the longitudinal direction of the wire 80, the stoppers 82A and 82B can be held by the holding wall 50C. Accordingly, the holding state of the stoppers 82A and 82B can be stabilized before the wire 80 is extended. As a result, it is possible to suppress noise generated by the stoppers 82A and 82B coming into contact with the housing 50 or the steering shaft 14.
 さらに、ワイヤ80に、複数の圧縮コイルばねを装着する場合には、複数のばねのばね荷重を異なる荷重に設定してもよい。これにより、ステアリングホイール16の最大操舵位置の手前において付与される操舵力を多段階に高くすることができる。その結果、運転者に対する操作性及び利便性を一層向上することができる。 Furthermore, when a plurality of compression coil springs are attached to the wire 80, the spring loads of the plurality of springs may be set to different loads. As a result, the steering force applied before the maximum steering position of the steering wheel 16 can be increased in multiple stages. As a result, the operability and convenience for the driver can be further improved.
 また、第3の実施の形態で用いられた圧縮コイルばね212を、第2の実施の形態の回動制限機構110に適用してもよい。この場合には、第1連結軸60が、自身の軸回りに回動可能に構成されているため、保持壁50Cを、第1連結軸60に設けるように構成してもよい。 Further, the compression coil spring 212 used in the third embodiment may be applied to the rotation restricting mechanism 110 of the second embodiment. In this case, since the first connecting shaft 60 is configured to be rotatable about its own axis, the holding wall 50 </ b> C may be provided on the first connecting shaft 60.
 また、第3の実施の形態では、ストッパ82Aを第1連結軸60から離間させる方向へ付勢する付勢部材を圧縮コイルばねで構成しているが、ストッパ82Aを付勢する付勢部材の形態は、これに限られない。例えば、当該付勢部材を引張コイルばねや板ばねなどによって構成してもよい。例えば、付勢部材を引張コイルばねで構成する場合には、保持壁50Cを、第3の実施の形態と比べて、ハウジング50の軸方向一方側に配置する。また、ストッパ82Aと保持壁50Cとの間に、引張コイルばねを配置して、引張コイルばねの一端部を保持壁50Cに係止して、引張コイルばねの他端部をストッパ82Aに係止するように構成してもよい。さらに、この場合には、ハウジング50における、引張コイルばねに対応する位置に、孔部を形成して、ハウジング50の径方向外側から引張コイルばねを組付可能に構成してもよい。 In the third embodiment, the urging member that urges the stopper 82A in the direction of separating from the first connecting shaft 60 is constituted by a compression coil spring. However, the urging member that urges the stopper 82A The form is not limited to this. For example, the urging member may be constituted by a tension coil spring or a leaf spring. For example, when the urging member is constituted by a tension coil spring, the holding wall 50C is arranged on one side in the axial direction of the housing 50 as compared with the third embodiment. Further, a tension coil spring is disposed between the stopper 82A and the holding wall 50C, one end of the tension coil spring is locked to the holding wall 50C, and the other end of the tension coil spring is locked to the stopper 82A. You may comprise. Further, in this case, a hole may be formed in the housing 50 at a position corresponding to the tension coil spring so that the tension coil spring can be assembled from the outside in the radial direction of the housing 50.
 また、圧縮コイルばね212やストッパ82Aによる異音の発生を抑制するという観点からすると、ハウジング50に保持壁50Cを設けることが望ましいが、第3の実施の形態において、ハウジング50の保持壁50Cを省略した構成にしてもよい。 Further, from the viewpoint of suppressing the generation of abnormal noise due to the compression coil spring 212 and the stopper 82A, it is desirable to provide the holding wall 50C on the housing 50. However, in the third embodiment, the holding wall 50C of the housing 50 is provided with The configuration may be omitted.
 また、第3の実施の形態では、ストッパ82Aが保持壁50Cに直接当接される構成になっているが、弾性を有するカバー等で保持壁50Cを被覆してもよい。または、保持壁50Cを、ハウジング50と別体に構成すると共に、弾性を有する材料で形成して、ハウジング50に固定するように構成してもよい。これにより、ステアリングホイール16が最大操舵位置から中立位置へ復帰するときに、弾性を有するカバーや保持壁50Cによってストッパ82Aを受け止めることができる。その結果、ストッパ82Aとカバーや保持壁50Cとの間で生じる異音の発生を抑制することができる。 In the third embodiment, the stopper 82A is in direct contact with the holding wall 50C. However, the holding wall 50C may be covered with an elastic cover or the like. Alternatively, the holding wall 50 </ b> C may be configured separately from the housing 50 and may be formed of an elastic material and fixed to the housing 50. Thereby, when the steering wheel 16 returns from the maximum steering position to the neutral position, the stopper 82A can be received by the elastic cover and the holding wall 50C. As a result, it is possible to suppress the generation of abnormal noise between the stopper 82A and the cover or holding wall 50C.
(第4の実施の形態)
 以下、図9~図11を用いて、第4の実施の形態のステアリング装置300について説明する。ステアリング装置300では、操舵装置12における回動制限機構310を除いて第1の実施の形態と同様に構成されている。なお、図9~図11では、回動制限機構310において、第1の実施の形態の回動制限機構24と同様に構成された部材には、同一の符号を付している。
(Fourth embodiment)
Hereinafter, a steering apparatus 300 according to the fourth embodiment will be described with reference to FIGS. 9 to 11. The steering device 300 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 310 in the steering device 12. 9 to 11, in the rotation limiting mechanism 310, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals.
 第4の実施の形態では、回動制限機構310が可変機構312を有している。そして、可変機構312によって、ワイヤ80のストッパ82Aがハウジング50の軸方向に移動して、ステアリングシャフト14に巻付けられるワイヤ80の巻付長さを可変するように構成されている。以下、具体的に説明する。 In the fourth embodiment, the rotation limiting mechanism 310 has a variable mechanism 312. The variable mechanism 312 moves the stopper 82A of the wire 80 in the axial direction of the housing 50 so that the winding length of the wire 80 wound around the steering shaft 14 is variable. This will be specifically described below.
 第1の実施の形態では、ストッパ82Aがワイヤ80の長手方向一端部に設けられているのに対して、第4の実施の形態では、ストッパ82Aがワイヤ80の長手方向一端側の部位に固定されて、ワイヤ80の長手方向一端部がストッパ82Aに対してハウジング50の軸方向一方側へ延出されている。また、ワイヤ80におけるストッパ82Aとストッパ82Bとの間の長さは、第1の実施の形態と同じ長さに設定されている。すなわち、第4の実施の形態では、第1の実施の形態と比べて、ワイヤ80の長手方向の長さが、長く設定されている。また、ワイヤ80の長手方向一端部には、環状を成す取付輪部84が形成されている。 In the first embodiment, the stopper 82A is provided at one end portion in the longitudinal direction of the wire 80, whereas in the fourth embodiment, the stopper 82A is fixed to a portion on one end side in the longitudinal direction of the wire 80. Thus, one end in the longitudinal direction of the wire 80 extends to one side in the axial direction of the housing 50 with respect to the stopper 82A. Further, the length between the stopper 82A and the stopper 82B in the wire 80 is set to the same length as that in the first embodiment. That is, in the fourth embodiment, the length in the longitudinal direction of the wire 80 is set to be longer than that in the first embodiment. Further, an annular attachment ring portion 84 is formed at one end portion of the wire 80 in the longitudinal direction.
 可変機構312は、スライダ320と、「駆動部」としてのモータ330と、モータ330の回転軸330Bに固定されたピニオン340と、を含んで構成されている。
 スライダ320は、略円筒状に形成され、ステアリングシャフト14とハウジング50との間において、第1連結軸60に対して軸方向一方側(図9~図11の矢印A方向側)で且つハウジング50と同軸上に配置されている。スライダ320の外周部には、図示しないキー溝が形成されており、当該キー溝は、スライダ320の径方向外側へ開放された溝状に形成されると共に、スライダ320の軸方向に延在されている。そして、当該キー溝内に、ハウジング50の内周部において軸方向に延在されたキー(図示省略)が、摺動可能に挿入されている。これにより、スライダ320が、ハウジング50に相対回動不能に連結されると共に、軸方向においてハウジング50に対して相対移動(スライド)可能に支持されている。なお、スライダ320とハウジング50との嵌合を、所謂スプライン嵌合として構成してもよい。すなわち、スライダ320の外周部に凹凸部を形成し、ハウジング50の内周部にスライダ320の外周部に対応する凹凸部を形成してもよい。
The variable mechanism 312 includes a slider 320, a motor 330 as a “drive unit”, and a pinion 340 fixed to the rotation shaft 330 </ b> B of the motor 330.
The slider 320 is formed in a substantially cylindrical shape, and is between the steering shaft 14 and the housing 50 on one side in the axial direction with respect to the first connecting shaft 60 (the direction of the arrow A in FIGS. 9 to 11) and the housing 50. And are arranged on the same axis. A key groove (not shown) is formed in the outer peripheral portion of the slider 320. The key groove is formed in a groove shape opened to the outside in the radial direction of the slider 320 and extends in the axial direction of the slider 320. ing. And the key (illustration omitted) extended in the axial direction in the inner peripheral part of the housing 50 is inserted in the said keyway so that sliding is possible. Thereby, the slider 320 is connected to the housing 50 so as not to be relatively rotatable, and is supported so as to be relatively movable (slidable) with respect to the housing 50 in the axial direction. Note that the fitting between the slider 320 and the housing 50 may be configured as a so-called spline fitting. That is, an uneven portion may be formed on the outer peripheral portion of the slider 320, and an uneven portion corresponding to the outer peripheral portion of the slider 320 may be formed on the inner peripheral portion of the housing 50.
 また、スライダ320の外周部の一部には、スライダ320の軸方向に延在されたラック部322が一体に形成されている。このラック部322は、複数のラック歯322Aを有しており、ラック歯322Aがスライダ320の軸方向に並んで配置されている。そして、ハウジング50には、固定部52よりも軸方向一方側で且つ当該ラック部322に対応する部位において、略矩形状の孔部50Dが貫通形成されており、ラック部322の一部が、当該孔部50Dによって、ハウジング50の径方向外側へ露出されている。さらに、スライダ320の内周部には、第1連結軸60側の端部において、連結ピンPが固定されており、前述したワイヤ80の取付輪部84が、連結ピンPによってスライダ320に連結されている。これにより、スライダ320が軸方向にスライドすることで、ワイヤ80における第1連結軸60と第2連結軸70との間の長さが、可変する構成になっている。 In addition, a rack portion 322 extending in the axial direction of the slider 320 is integrally formed on a part of the outer peripheral portion of the slider 320. The rack portion 322 has a plurality of rack teeth 322 </ b> A, and the rack teeth 322 </ b> A are arranged in the axial direction of the slider 320. The housing 50 is formed with a substantially rectangular hole 50D penetratingly formed at one side in the axial direction of the fixed portion 52 and corresponding to the rack portion 322. The hole 50D is exposed to the outside in the radial direction of the housing 50. Further, a connecting pin P is fixed to the inner peripheral portion of the slider 320 at the end on the first connecting shaft 60 side, and the mounting ring portion 84 of the wire 80 described above is connected to the slider 320 by the connecting pin P. Has been. Thereby, the length between the 1st connection shaft 60 and the 2nd connection shaft 70 in the wire 80 becomes variable because the slider 320 slides to an axial direction.
 モータ330は、略円柱状のモータ本体330Aと、モータ本体330Aの軸方向一端部から延出された回転軸330Bと、を含んで構成されている。図10に示されるように、モータ本体330Aは、ハウジング50の径方向外側に配置されると共に、ハウジング50の固定部52の先端側から見て、ハウジング50の軸方向に対して直交する方向に沿って配置されている。そして、モータ本体330Aが、ハウジング50に形成された固定ボス50Eに固定ボルトB2によって固定されている。回転軸330Bは、モータ本体330Aからハウジング50側へ延出されると共に、スライダ320のラック部322に対してスライダ320の径方向外側に配置されている。また、モータ330は、制御部40に電気的に接続されており、制御部40の制御によってモータ330が駆動する構成になっている。 The motor 330 includes a substantially cylindrical motor main body 330A and a rotary shaft 330B extending from one axial end of the motor main body 330A. As shown in FIG. 10, the motor main body 330 </ b> A is arranged on the outer side in the radial direction of the housing 50, and in a direction orthogonal to the axial direction of the housing 50 when viewed from the distal end side of the fixing portion 52 of the housing 50. Are arranged along. The motor body 330A is fixed to a fixed boss 50E formed on the housing 50 by a fixing bolt B2. The rotation shaft 330 </ b> B extends from the motor main body 330 </ b> A toward the housing 50, and is disposed on the outer side in the radial direction of the slider 320 with respect to the rack portion 322 of the slider 320. In addition, the motor 330 is electrically connected to the control unit 40 and is configured to be driven by the control of the control unit 40.
 図9にも示されるように、ピニオン340は、略円筒状に形成されると共に、モータ330の回転軸330Bに固定されて、ハウジング50の孔部50D内に配置されている。また、ピニオン340の外周部には、複数のピニオン歯340Aが形成されており、ピニオン歯340Aは、ラック部322のラック歯322Aに噛合されている。これにより、モータ330が駆動することで、ピニオン340が回動して、ラック部322と共にスライダ320が軸方向に移動するようになっている。すなわち、スライダ320のラック部322及びピニオン340によって、モータ330の駆動力をスライダ320に伝達する駆動力伝達機構324を構成している。 As shown in FIG. 9, the pinion 340 is formed in a substantially cylindrical shape, and is fixed to the rotating shaft 330 </ b> B of the motor 330 and is disposed in the hole 50 </ b> D of the housing 50. A plurality of pinion teeth 340 </ b> A are formed on the outer periphery of the pinion 340, and the pinion teeth 340 </ b> A mesh with the rack teeth 322 </ b> A of the rack portion 322. Thus, when the motor 330 is driven, the pinion 340 is rotated, and the slider 320 is moved in the axial direction together with the rack portion 322. That is, the rack portion 322 and the pinion 340 of the slider 320 constitute a driving force transmission mechanism 324 that transmits the driving force of the motor 330 to the slider 320.
 そして、図9及び図10に示される状態が、可変機構312の初期状態である。この初期状態では、ステアリングホイール16が中立位置に配置されており、ストッパ82Aが、第1連結軸60に対してハウジング50の軸方向一方側に離間して配置されている。具体的には、ワイヤ80が弛みのない状態となるように、ハウジング50に対するスライダ320の位置が設定されている。より詳しくは、運転者のステアリングホイール16に対する操舵に影響を与えない程度の比較的低い引張力が、ワイヤ80に生じるように、ワイヤ80が長手方向に引張られるようになっている。 9 and 10 is the initial state of the variable mechanism 312. In this initial state, the steering wheel 16 is disposed at the neutral position, and the stopper 82 </ b> A is disposed away from the first connecting shaft 60 on one side in the axial direction of the housing 50. Specifically, the position of the slider 320 relative to the housing 50 is set so that the wire 80 is not slack. More specifically, the wire 80 is pulled in the longitudinal direction so that a relatively low tensile force that does not affect the steering of the steering wheel 16 by the driver is generated in the wire 80.
 また、制御部40は、操舵角センサ18から出力される出力信号に基づいて、モータ330を駆動させて、スライダ320が、ステアリングホイール16(ステアリングシャフト14)の回動に追従してスライドするようになっている。具体的には、可変機構312の初期状態におけるワイヤ80の弛みのない状態を維持するように、制御部40が、モータ330を駆動させるようになっている。 Further, the control unit 40 drives the motor 330 based on the output signal output from the steering angle sensor 18 so that the slider 320 slides following the rotation of the steering wheel 16 (steering shaft 14). It has become. Specifically, the control unit 40 drives the motor 330 so as to maintain the state in which the wire 80 is not slack in the initial state of the variable mechanism 312.
 そして、第3の実施の形態においても、中立位置からステアリングホイール16が運転者の操舵によって回動方向一方側(又は回動方向他方側)へ回動されると、ステアリングシャフト14が自身の軸回りに回動方向一方側(又は回動方向他方側)へ回動して、ワイヤ80がステアリングシャフト14に巻付けられる。そして、図11に示されるように、ステアリングホイール16の最大操舵位置では、ストッパ82Aが第1連結軸60の面取部62Aに嵌合して、ステアリングシャフト14の回動が制限される。これにより、第4の実施の形態においても、第1の実施の形態と同様の作用及び効果を奏することができる。 Also in the third embodiment, when the steering wheel 16 is turned from the neutral position to one side in the turning direction (or the other side in the turning direction) by the steering of the driver, the steering shaft 14 is moved to its own axis. The wire 80 is wound around the steering shaft 14 by rotating to one side in the rotation direction (or the other side in the rotation direction). As shown in FIG. 11, at the maximum steering position of the steering wheel 16, the stopper 82 </ b> A is fitted to the chamfered portion 62 </ b> A of the first connecting shaft 60, and the rotation of the steering shaft 14 is restricted. Thereby, also in 4th Embodiment, there can exist an effect | action and effect similar to 1st Embodiment.
 また、第4の実施の形態では、可変機構312の作動時に制御部40によってモータ330のトルクを高くするように制御することで、ステアリングホイール16の中立位置と最大操舵位置との間の任意の位置において、スライダ320のスライドを止めることができる。これにより、ワイヤ80の巻付長さを可変にすることができる。換言すると、ステアリングホイール16の最大操舵位置を可変にすることができる。その結果、例えば、ステアリングホイール16の回動中に車輪Hの転舵が縁石等によって制限されたときに、ステアリングホイール16の回動を可変機構312によって制限することで、車輪Hの転舵が制限されたことを運転者に認知させることができる。したがって、運転者に対する操作性を一層向上することができる。なお、この場合には、例えば、制御部40が、転舵センサ38からの出力に基づいて、車輪Hの転舵が制限されたことを検知する。
 また、ワイヤ80の巻付長さを可変にすることで、例えば、各種車両に対応した、ステアリングホイール16の最大操舵位置を容易に設定することができる。
In the fourth embodiment, when the variable mechanism 312 is operated, the control unit 40 controls the motor 330 to increase the torque of the motor 330, so that an arbitrary position between the neutral position and the maximum steering position of the steering wheel 16 can be obtained. In position, the slide of the slider 320 can be stopped. Thereby, the winding length of the wire 80 can be made variable. In other words, the maximum steering position of the steering wheel 16 can be made variable. As a result, for example, when the turning of the wheel H is restricted by a curb or the like while the steering wheel 16 is turning, the turning of the steering wheel 16 is restricted by the variable mechanism 312 so that the turning of the wheel H can be performed. The driver can be made aware of the restriction. Therefore, the operability for the driver can be further improved. In this case, for example, the control unit 40 detects that the steering of the wheel H is restricted based on the output from the steering sensor 38.
Further, by making the winding length of the wire 80 variable, for example, the maximum steering position of the steering wheel 16 corresponding to various vehicles can be easily set.
 さらに、上述のように、ステアリングホイール16の中立位置では、可変機構312によって、ワイヤ80が弛みのない状態に設定されている。このため、ワイヤ80をステアリングシャフト14の径方向外側に離間して配置することができる。これにより、ワイヤ80の絡まりを効果的に抑制することができる。また、ワイヤ80の弛みが抑制されることで、例えば、ステアリングホイール16の中立位置において、ワイヤ80とステアリングシャフト14との干渉を抑制することができる。これにより、ワイヤ80とステアリングシャフト14との間で生じる異音の発生を抑制することができる。 Furthermore, as described above, at the neutral position of the steering wheel 16, the variable mechanism 312 sets the wire 80 so as not to loosen. For this reason, the wire 80 can be spaced apart from the radial outer side of the steering shaft 14. Thereby, the entanglement of the wire 80 can be effectively suppressed. Further, by suppressing the slackness of the wire 80, for example, interference between the wire 80 and the steering shaft 14 can be suppressed at the neutral position of the steering wheel 16. Thereby, generation | occurrence | production of the noise which arises between the wire 80 and the steering shaft 14 can be suppressed.
 また、第4の実施の形態では、可変機構312がワイヤ80の長手方向一端部に連結されている。このため、可変機構312を用いて、ワイヤ80の破断などを検知することができる。すなわち、上述のように、ステアリングホイール16の中立位置から最大操舵位置までの間では、可変機構312によって、ワイヤ80の弛みのない状態が維持されている。このため、例えば、制御部40がモータ330のモータ電流を検知して、当該モータ電流が所定値よりも低い場合には、ワイヤ80の伸長状態が解除されたとして(すなわち、ワイヤ80の破断が発生したとして)制御部40が検知してもよい。 In the fourth embodiment, the variable mechanism 312 is connected to one end of the wire 80 in the longitudinal direction. For this reason, it is possible to detect breakage of the wire 80 using the variable mechanism 312. That is, as described above, the state in which the wire 80 is not slack is maintained by the variable mechanism 312 between the neutral position of the steering wheel 16 and the maximum steering position. For this reason, for example, when the control unit 40 detects the motor current of the motor 330 and the motor current is lower than a predetermined value, the extension state of the wire 80 is released (that is, the wire 80 is broken). It may be detected by the control unit 40 (assuming it has occurred).
 また、例えば、初期状態におけるスライダ320を軸方向一方側へスライドさせるように、制御部40によってモータ330を駆動させて、スライダ320が初期状態の位置から軸方向一方側へスライドした場合には、ワイヤ80の破断が発生したとして制御部40が検知してもよい。このため、可変機構312を安全装置として機能させることもできる。この場合には、車両に、ワイヤ80の破断を報知する報知装置を設けて、ワイヤ80の破断が発生したことを当該報知装置から報知するように構成してもよい。以上により、ワイヤ80を用いた場合におけるフェールセーフを実施することができる。 Further, for example, when the control unit 40 drives the motor 330 so as to slide the slider 320 in the initial state to one side in the axial direction, and the slider 320 slides from the position in the initial state to one side in the axial direction, The control unit 40 may detect that the wire 80 is broken. For this reason, the variable mechanism 312 can also function as a safety device. In this case, the vehicle may be provided with a notification device that notifies the breakage of the wire 80, and the notification device may notify that the breakage of the wire 80 has occurred. As described above, fail-safe when the wire 80 is used can be implemented.
 さらに、可変機構312では、モータ330の駆動によってスライダ320が軸方向に移動する。このため、ステアリングホイール16の最大操舵位置の手前において、モータ330のトルクを高くするように制御部40がモータ330を制御することで、ステアリングホイール16の操舵力を高くすることができる。これにより、第3の実施の形態と同様に、ステアリングホイール16が最大操舵位置に到達することを、運転者に認知させることができる。 Further, in the variable mechanism 312, the slider 320 moves in the axial direction by driving the motor 330. For this reason, before the maximum steering position of the steering wheel 16, the control unit 40 controls the motor 330 so as to increase the torque of the motor 330, whereby the steering force of the steering wheel 16 can be increased. As a result, as in the third embodiment, the driver can be made aware that the steering wheel 16 has reached the maximum steering position.
 また、第4の実施の形態では、スライダ320にラック部322が一体に形成されると共に、モータ330の回転軸330Bには、ラック部322に噛合されたピニオン340が固定されている。このため、ラック部322とピニオン340とがギヤ列を構成しており、当該ギヤ列によってモータ330及びスライダ320が連結されている。このため、簡易な構成で、ワイヤ80の巻付長さを可変にすることができる。 In the fourth embodiment, the rack portion 322 is formed integrally with the slider 320, and the pinion 340 engaged with the rack portion 322 is fixed to the rotating shaft 330B of the motor 330. For this reason, the rack part 322 and the pinion 340 constitute a gear train, and the motor 330 and the slider 320 are connected by the gear train. For this reason, the winding length of the wire 80 can be made variable with a simple configuration.
 なお、第4の実施の形態の可変機構312では、モータ330に固定されたピニオン340が、スライダ320のラック部322に直接噛合される構成になっている。これに代えて、ピニオン340とラック部322との間に、ピニオン340の回転を減速する減速機構(ギヤ列)を設けてもよい。これにより、ステアリングホイール16の回動途中においてスライダ320のスライドをモータ330によって止めるときのモータ330のトルクを、上記第4の実施の形態に比べて低くすることができる。したがって、モータ330の小型化に寄与することができる。 In the variable mechanism 312 according to the fourth embodiment, the pinion 340 fixed to the motor 330 is directly engaged with the rack portion 322 of the slider 320. Instead, a speed reduction mechanism (gear train) that decelerates the rotation of the pinion 340 may be provided between the pinion 340 and the rack portion 322. Thereby, the torque of the motor 330 when the slide of the slider 320 is stopped by the motor 330 during the rotation of the steering wheel 16 can be made lower than that of the fourth embodiment. Therefore, it is possible to contribute to downsizing of the motor 330.
 また、第4の実施の形態では、上述のように、ステアリングホイール16の回動途中において、制御部40によってモータ330のトルクを高くすることで、スライダ320のスライドを止めているが、スライダ320のスライドを止める構成はこれに限らない。例えば、スライダ320におけるラック部322に噛合可能に構成されたロック部材を、ラック部322と対向するように設けると共に、制御部40に電気的に接続されたソレノイド等のアクチュエータによって、当該ロック部材を作動させるに構成してもよい。そして、制御部40によってアクチュエータを作動させて、ロック部材をラック部322に噛合させることで、スライダ320のスライドを止めるように構成してもよい。 In the fourth embodiment, as described above, while the steering wheel 16 is being rotated, the control unit 40 increases the torque of the motor 330 to stop the slider 320 from sliding. The configuration for stopping the slide is not limited to this. For example, a lock member configured to be able to mesh with the rack portion 322 of the slider 320 is provided so as to face the rack portion 322, and the lock member is moved by an actuator such as a solenoid electrically connected to the control unit 40. It may be configured to operate. And you may comprise so that the slide of the slider 320 may be stopped by operating an actuator by the control part 40 and meshing | locking the lock member with the rack part 322. FIG.
 次に、可変機構の変形例について説明する。
(可変機構の変形例1について)
 図12(A)及び(B)に示されるように、変形例1では、可変機構312が、巻取軸350と、ウォームホイール354と、ウォーム356と、モータ330と、を含んで構成されている。巻取軸350は、ステアリングシャフト14の径方向を軸方向とした略円筒状に形成されると共に、第1連結軸60(図示省略)に対してハウジング50の軸方向一方側に配置されている。また、巻取軸350の軸心部には、支持軸351の一端部が一体回動可能に固定されており、支持軸351の他端部が、ハウジング50に固定されたブラケット352を介してハウジング50に回動可能に支持されている。また、ワイヤ80の長手方向一端部が巻取軸350に連結されている。さらに、巻取軸350の軸方向両端部には、一対のフランジ350Aが形成されており、一対のフランジ350Aの間に、ワイヤ80の長手方向一方側の部分が配置されている。
Next, a modification of the variable mechanism will be described.
(Variation 1 of the variable mechanism)
As shown in FIGS. 12A and 12B, in the first modification, the variable mechanism 312 includes a winding shaft 350, a worm wheel 354, a worm 356, and a motor 330. Yes. The take-up shaft 350 is formed in a substantially cylindrical shape with the radial direction of the steering shaft 14 as the axial direction, and is disposed on one axial side of the housing 50 with respect to the first connecting shaft 60 (not shown). . Further, one end portion of the support shaft 351 is fixed to the shaft center portion of the winding shaft 350 so as to be integrally rotatable, and the other end portion of the support shaft 351 is interposed via a bracket 352 fixed to the housing 50. The housing 50 is rotatably supported. Further, one end in the longitudinal direction of the wire 80 is connected to the winding shaft 350. Further, a pair of flanges 350A are formed at both axial ends of the winding shaft 350, and a portion on one side in the longitudinal direction of the wire 80 is disposed between the pair of flanges 350A.
 ウォームホイール354は、巻取軸350と同軸上に配置されて、巻取軸350に対してハウジング50の径方向外側に配置されている。また、ウォームホイール354の軸心部が、支持軸351と一体回動可能に固定されており、ウォームホイール354の外周部には、ウォーム歯が形成されている。 The worm wheel 354 is arranged coaxially with the take-up shaft 350 and is arranged on the outer side in the radial direction of the housing 50 with respect to the take-up shaft 350. Further, the axial center portion of the worm wheel 354 is fixed so as to be integrally rotatable with the support shaft 351, and worm teeth are formed on the outer peripheral portion of the worm wheel 354.
 モータ330は、ハウジング50の径方向外側に配置されており、モータ330の回転軸330Bが、ハウジング50の軸方向に直交する方向に沿って配置されている。そして、モータ330の回転軸330Bにウォーム356が固定されており、ウォーム356は、ウォームホイール354の径方向外側に隣接配置されて、ウォームホイール354に噛合されている。 The motor 330 is disposed on the outer side in the radial direction of the housing 50, and the rotation shaft 330 </ b> B of the motor 330 is disposed along a direction orthogonal to the axial direction of the housing 50. A worm 356 is fixed to the rotating shaft 330 </ b> B of the motor 330. The worm 356 is disposed adjacent to the radially outer side of the worm wheel 354 and meshed with the worm wheel 354.
 このため、モータ330が駆動することで、ウォーム356によってウォームホイール354が回動すると共に、巻取軸350が自身の軸回り一方側又は他方側へ回動される。すなわち、ウォーム356及びウォームホイール354によって、モータ330の駆動力を巻取軸350に伝達する駆動力伝達機構358を構成している。これにより、巻取軸350によってワイヤ80が巻取られ、又は、巻取軸350に巻取られたワイヤ80が巻取軸350から引出される。したがって、変形例1においても、ワイヤ80の巻付長さを可変にすることができる。 Therefore, when the motor 330 is driven, the worm wheel 354 is rotated by the worm 356, and the winding shaft 350 is rotated to one side or the other side around its own axis. That is, the worm 356 and the worm wheel 354 constitute a driving force transmission mechanism 358 that transmits the driving force of the motor 330 to the winding shaft 350. As a result, the wire 80 is taken up by the take-up shaft 350, or the wire 80 taken up by the take-up shaft 350 is drawn from the take-up shaft 350. Therefore, also in the modification 1, the winding length of the wire 80 can be made variable.
 また、変形例1では、モータ330の回転が、ウォーム356及びウォームホイール354によって減速されて、巻取軸350が回動する。このため、制御部40によってモータ330のトルクを制御してステアリングシャフト14の回動を制限するときのモータ330のトルクを低くすることができる。したがって、モータ330の小型化に寄与することができる。 In the first modification, the rotation of the motor 330 is decelerated by the worm 356 and the worm wheel 354, and the winding shaft 350 rotates. For this reason, it is possible to reduce the torque of the motor 330 when the control unit 40 controls the torque of the motor 330 to limit the rotation of the steering shaft 14. Therefore, it is possible to contribute to downsizing of the motor 330.
(可変機構の変形例2について)
 第4の実施の形態及び変形例1では、可変機構312によって、ワイヤ80の長手方向一端部を移動させて、ワイヤ80の巻付長さを可変する(すなわち、ステアリングホイール16の最大操舵角を可変にする)にように構成されている。これに代えて、変形例2では、第1連結軸60をステアリングシャフト14の軸方向に移動可能に構成して、ステアリングホイール16の最大操舵位置を可変にするように構成している。以下、具体的に説明する。
(Variation 2 of the variable mechanism)
In the fourth embodiment and Modification 1, the variable mechanism 312 moves one end of the wire 80 in the longitudinal direction to vary the winding length of the wire 80 (that is, the maximum steering angle of the steering wheel 16 is increased). It is configured to be variable). Instead, in the second modification, the first connecting shaft 60 is configured to be movable in the axial direction of the steering shaft 14, and the maximum steering position of the steering wheel 16 is configured to be variable. This will be specifically described below.
 図13に示されるように、変形例2では、回動制限機構310のハウジング50の径方向外側に、略円筒状の「支持部材」としての支持ハウジング360が設けられており、支持ハウジング360は、回動制限機構310の外郭を構成している。一方、ハウジング50は、支持ハウジング360に相対回動不能に連結されると共に、支持ハウジング360の軸方向において支持ハウジング360に相対移動(スライド)可能に支持されている。すなわち、第4の実施の形態における可変機構312のスライダ320と同様に、ハウジング50の外周部には、図示しないキー溝が形成されており、キー溝が、ハウジング50の径方向外側へ開放された溝状に形成されると共に、スライダ320の軸方向に延在されている。また、支持ハウジング360の内周部には、軸方向に延在されたキー(図示省略)が設けられており、キーがキー溝内に摺動可能に挿入されている。 As shown in FIG. 13, in the second modification, a support housing 360 as a substantially cylindrical “support member” is provided on the outer side in the radial direction of the housing 50 of the rotation limiting mechanism 310. An outer shell of the rotation limiting mechanism 310 is configured. On the other hand, the housing 50 is connected to the support housing 360 so as not to be relatively rotatable, and is supported by the support housing 360 so as to be relatively movable (slidable) in the axial direction of the support housing 360. That is, similarly to the slider 320 of the variable mechanism 312 in the fourth embodiment, a key groove (not shown) is formed on the outer peripheral portion of the housing 50, and the key groove is opened to the outside in the radial direction of the housing 50. It is formed in a groove shape and extends in the axial direction of the slider 320. A key (not shown) extending in the axial direction is provided on the inner peripheral portion of the support housing 360, and the key is slidably inserted into the key groove.
 また、ハウジング50の外周部には、固定部52に対して軸方向他方側の位置において、ハウジング50の軸方向に延在されたラック部54が一体に形成されている。このラック部54は、複数のラック歯54Aを有しており、ラック歯54Aがハウジング50の軸方向に並んで配置されている。そして、支持ハウジング360には、当該ラック部54に対してハウジング50の径方向外側の部位において、略矩形状の孔部360Aが貫通形成されており、孔部360Aにモータ330のピニオン340が配置されて、ピニオン340がラック部54に噛合されている。すなわち、ラック部54及びピニオン340によって、モータ330の駆動力をハウジング50に伝達する駆動力伝達機構362を構成している。 Further, a rack portion 54 extending in the axial direction of the housing 50 is integrally formed on the outer peripheral portion of the housing 50 at a position on the other side in the axial direction with respect to the fixed portion 52. The rack portion 54 has a plurality of rack teeth 54 </ b> A, and the rack teeth 54 </ b> A are arranged in the axial direction of the housing 50. The support housing 360 is formed with a substantially rectangular hole 360A penetratingly formed at a portion radially outside the housing 50 with respect to the rack portion 54, and the pinion 340 of the motor 330 is disposed in the hole 360A. Thus, the pinion 340 is meshed with the rack portion 54. That is, the rack portion 54 and the pinion 340 constitute a driving force transmission mechanism 362 that transmits the driving force of the motor 330 to the housing 50.
 さらに、図示は省略するが、変形例2においても、可変機構312の初期状態では、第4の実施の形態と同様に、ワイヤ80が長手方向に伸長した状態となるように、支持ハウジング360に対するハウジング50の位置が設定されている。また、ステアリングホイール16の回動時には、制御部40(図13では、不図示)は、操舵角センサ18から出力される出力信号に基づいて、モータ330を駆動させて、初期状態におけるワイヤ80の伸長状態を維持するように、ハウジング50が支持ハウジング360に対して軸方向他方側へスライドする。以上により、ステアリングシャフト14の軸方向における第1連結軸60と第2連結軸70との距離を可変にすることができる。その結果、変形例2では、ワイヤ80の巻付長さは変化しないが、ステアリングホイール16の最大操舵位置を可変にすることができる。 Furthermore, although illustration is omitted, in the second modification as well, in the initial state of the variable mechanism 312, as in the fourth embodiment, the wire 80 is extended in the longitudinal direction so that the support housing 360 is extended. The position of the housing 50 is set. Further, when the steering wheel 16 is rotated, the control unit 40 (not shown in FIG. 13) drives the motor 330 based on the output signal output from the steering angle sensor 18, and the wire 80 in the initial state is driven. The housing 50 slides to the other side in the axial direction with respect to the support housing 360 so as to maintain the extended state. As described above, the distance between the first connecting shaft 60 and the second connecting shaft 70 in the axial direction of the steering shaft 14 can be made variable. As a result, in the second modification, the winding length of the wire 80 does not change, but the maximum steering position of the steering wheel 16 can be made variable.
(可変機構の変形例3)
 可変機構312の変形例2では、第1連結軸60をステアリングシャフト14の軸方向に移動可能に構成して、ステアリングホイール16の最大操舵角を可変にするように構成しているが、変形例3では、第1連結軸60をステアリングシャフト14の周方向に移動可能(回動可能)に構成して、ステアリングホイール16の最大操舵位置を可変にするように構成している。
(Variation 3 of the variable mechanism)
In the second modification of the variable mechanism 312, the first connecting shaft 60 is configured to be movable in the axial direction of the steering shaft 14, and the maximum steering angle of the steering wheel 16 is made variable. 3, the first connecting shaft 60 is configured to be movable (rotatable) in the circumferential direction of the steering shaft 14, and the maximum steering position of the steering wheel 16 is configured to be variable.
 すなわち、図14に示されるように、可変機構312の変形例3では、変形例2と同様に、回動制限機構310のハウジング50の径方向外側に、略円筒状の支持ハウジング360が設けられており、支持ハウジング360は、回動制限機構310の外郭を構成している。そして、ハウジング50と支持ハウジング360との間には、一対の略円環状の軸受370(本変形例では、ボールベアリング)が設けられており、ハウジング50が、軸受370を介して支持ハウジング360に回動可能に支持されている。 That is, as shown in FIG. 14, in the third modification of the variable mechanism 312, as in the second modification, a substantially cylindrical support housing 360 is provided on the radially outer side of the housing 50 of the rotation limiting mechanism 310. The support housing 360 constitutes the outline of the rotation limiting mechanism 310. A pair of substantially annular bearings 370 (ball bearings in this modification) are provided between the housing 50 and the support housing 360, and the housing 50 is attached to the support housing 360 via the bearing 370. It is rotatably supported.
 また、ハウジング50の軸方向他方側端部(図14の矢印B方向側の端部)の外周部には、ギヤ部50Fが形成されており、ギヤ部50Fは、複数の外歯によって構成されている。また、モータ330は、ステアリングシャフト14と略平行に配置されている。このモータ330の回転軸330Bには、略円筒状の駆動ギヤ380が固定されており、駆動ギヤ380の径寸法は、ハウジング50よりも小さく設定されている。そして、駆動ギヤ380の外周部には、ハウジング50におけるギヤ部50Fの外歯と噛合されたギヤ歯が形成されている。すなわち、ハウジング50のギヤ部50F及び駆動ギヤ380によって、モータ330の駆動力をハウジング50に伝達する駆動力伝達機構382を構成している。 A gear portion 50F is formed on the outer peripheral portion of the other end portion in the axial direction of the housing 50 (the end portion on the arrow B direction side in FIG. 14), and the gear portion 50F is configured by a plurality of external teeth. ing. The motor 330 is disposed substantially parallel to the steering shaft 14. A substantially cylindrical drive gear 380 is fixed to the rotating shaft 330 </ b> B of the motor 330, and the diameter of the drive gear 380 is set smaller than that of the housing 50. In addition, gear teeth that mesh with external teeth of the gear portion 50 </ b> F in the housing 50 are formed on the outer peripheral portion of the drive gear 380. In other words, the driving force transmission mechanism 382 that transmits the driving force of the motor 330 to the housing 50 is configured by the gear portion 50 </ b> F and the driving gear 380 of the housing 50.
 以上により、変形例3では、制御部40の制御によってモータ330が駆動すると、ハウジング50と共に第1連結軸60が支持ハウジング360に対して相対回動する。このため、ステアリングシャフト14の周方向における、第1連結軸60と第2連結軸70との相対位置を可変にすることができる。これにより、上記変形例2と同様に、ワイヤ80の巻付長さは変化しないが、ステアリングホイール16の最大操舵位置を可変にすることができる。 As described above, in the third modification, when the motor 330 is driven by the control of the control unit 40, the first connecting shaft 60 rotates relative to the support housing 360 together with the housing 50. For this reason, the relative position of the first connecting shaft 60 and the second connecting shaft 70 in the circumferential direction of the steering shaft 14 can be made variable. As a result, as in the second modification, the winding length of the wire 80 does not change, but the maximum steering position of the steering wheel 16 can be made variable.
 また、変形例3には、ハウジング50の径寸法が、駆動ギヤ380よりも大きく設定されている。このため、駆動ギヤ380とハウジング50のギヤ部50Fとによって、モータ330の回転が減速される。すなわち、駆動ギヤ380及びハウジング50のギヤ部50Fによって減速機構が構成される。このため、ステアリングシャフト14の回動を制限するときのモータ330のトルクを低くすることができる。したがって、モータ330の小型化に寄与することができる。 In the third modification, the diameter of the housing 50 is set larger than that of the drive gear 380. For this reason, the rotation of the motor 330 is decelerated by the drive gear 380 and the gear portion 50F of the housing 50. In other words, the drive gear 380 and the gear portion 50F of the housing 50 constitute a speed reduction mechanism. For this reason, the torque of the motor 330 when limiting the rotation of the steering shaft 14 can be reduced. Therefore, it is possible to contribute to downsizing of the motor 330.
(第5の実施の形態)
 以下、図15を用いて、第5の実施の形態のステアリング装置400について説明する。ステアリング装置400では、操舵装置12における回動制限機構410を除いて第1の実施の形態のバリエーション3と同様に構成されている。なお、図15では、回動制限機構410において、第1の実施の形態のバリエーション3と同様に構成された部材には、同一の符号を付している。
(Fifth embodiment)
Hereinafter, the steering apparatus 400 according to the fifth embodiment will be described with reference to FIG. The steering device 400 is configured in the same manner as the variation 3 of the first embodiment except for the rotation limiting mechanism 410 in the steering device 12. In FIG. 15, in the rotation limiting mechanism 410, members that are configured in the same manner as the variation 3 of the first embodiment are denoted by the same reference numerals.
 すなわち、第5の実施の形態では、ハウジング50に一対の第1連結軸60が設けられており、一対の第1連結軸60が、ハウジング50の軸方向に離間して配置されると共に、ハウジング50の軸方向において対称を成すように配置されている。また、ステアリングシャフト14の第2連結軸70は、ステアリングシャフト14の軸方向において、一対の第1連結軸60の間に配置されている。そして、ワイヤ80の長手方向両端部分が一対の第1連結軸60に連結されており、ワイヤ80の長手方向中間部が第2連結軸70に連結されている。また、ワイヤ80の外周部は、絶縁材によって構成された絶縁カバー86によって被覆されている。 In other words, in the fifth embodiment, the housing 50 is provided with a pair of first connection shafts 60, and the pair of first connection shafts 60 are arranged apart from each other in the axial direction of the housing 50. It arrange | positions so that it may be symmetrical in 50 axial directions. The second connection shaft 70 of the steering shaft 14 is disposed between the pair of first connection shafts 60 in the axial direction of the steering shaft 14. The both ends of the wire 80 in the longitudinal direction are coupled to the pair of first coupling shafts 60, and the middle portion in the longitudinal direction of the wire 80 is coupled to the second coupling shaft 70. The outer periphery of the wire 80 is covered with an insulating cover 86 made of an insulating material.
 さらに、ワイヤ80の長手方向一端部は、電源(車両のバッテリーなど)に電気的に接続されおり、ワイヤ80の長手方向他端部は、グランド接地されている。また、ワイヤ80の長手方向他端部には、電圧を検出する「破断検出部」としてのセンサ412が設けられており、センサ412は、制御部40に電気的に接続されている。 Furthermore, one end in the longitudinal direction of the wire 80 is electrically connected to a power source (such as a vehicle battery), and the other end in the longitudinal direction of the wire 80 is grounded. In addition, a sensor 412 as a “break detection unit” that detects a voltage is provided at the other longitudinal end of the wire 80, and the sensor 412 is electrically connected to the control unit 40.
 そして、センサ412は、検出した電圧に基づいて、ワイヤ80の破断を予知又は検知するように構成されている。すなわち、ワイヤ80の長手方向一端部を電源に接続することにより、電流がワイヤ80内を流れるため、ワイヤ80自体が抵抗として作用する。これにより、ワイヤ80に破断(一部の破断も含む)が生じると、等価的にワイヤ80の抵抗値が大きくなるため、センサ412によって検出される電圧が低くなる。このため、センサ412によって検出された電圧値が、第1の閾値よりも低いときには、制御部40がワイヤ80の破断を予知し、センサ412によって検出された電圧値が、第1の閾値よりも低い第2の閾値よりも低いときには、制御部40がワイヤ80の破断を検知するようになっている。その結果、回動制限機構410を、第4の実施の形態と同様に、安全装置として機能させることができる。この場合には、制御部40に電気的に接続された「報知部」としての報知装置420を、車両に設けて、ワイヤ80の破断の予知又は検知を報知装置420から報知するように構成してもよい。 The sensor 412 is configured to predict or detect the breakage of the wire 80 based on the detected voltage. That is, by connecting one end of the wire 80 in the longitudinal direction to the power source, a current flows in the wire 80, so that the wire 80 itself acts as a resistance. As a result, when the wire 80 is broken (including some breaks), the resistance value of the wire 80 is equivalently increased, and the voltage detected by the sensor 412 is lowered. For this reason, when the voltage value detected by the sensor 412 is lower than the first threshold value, the control unit 40 predicts the breakage of the wire 80, and the voltage value detected by the sensor 412 is lower than the first threshold value. When lower than the lower second threshold, the control unit 40 detects the breakage of the wire 80. As a result, the rotation limiting mechanism 410 can function as a safety device as in the fourth embodiment. In this case, a notification device 420 as a “notification unit” electrically connected to the control unit 40 is provided in the vehicle so that the notification device 420 notifies the prediction or detection of the breakage of the wire 80. May be.
 なお、第5の実施の形態では、センサ412をワイヤ80の長手方向他端部に接続する構成にしたが、ワイヤ80の破断を精度良く予知又は検知するために、ワイヤ80におけるストッパ82Bに対して長手方向一方側(第1連結軸60側)の近接部分にセンサ412を接続してもよい。この場合は、ストッパ82B側の第1連結軸60に、ワイヤ挿通孔62と第1連結軸60の外部とを連通する連通孔を形成して、当該連通孔内に、センサ412とワイヤ80とを接続する接続線を配置してもよい。 In the fifth embodiment, the sensor 412 is connected to the other end in the longitudinal direction of the wire 80. However, in order to accurately predict or detect the breakage of the wire 80, the sensor 412 is connected to the stopper 82B of the wire 80. Thus, the sensor 412 may be connected to a proximity portion on one side in the longitudinal direction (on the first connecting shaft 60 side). In this case, a communication hole that connects the wire insertion hole 62 and the outside of the first connection shaft 60 is formed in the first connection shaft 60 on the stopper 82B side, and the sensor 412 and the wire 80 are connected in the communication hole. You may arrange the connection line which connects.
(第6の実施の形態)
 以下、図16(A)及び(B)を用いて、第6の実施の形態のステアリング装置500について説明する。ステアリング装置500では、操舵装置12における回動制限機構510を除いて第1の実施の形態と同様に構成されている。なお、図16では、回動制限機構510において、第1の実施の形態の回動制限機構24と同様に構成された部材には、同一の符号を付している。
(Sixth embodiment)
Hereinafter, the steering apparatus 500 according to the sixth embodiment will be described with reference to FIGS. The steering device 500 is configured in the same manner as in the first embodiment except for the rotation limiting mechanism 510 in the steering device 12. In FIG. 16, in the rotation limiting mechanism 510, members that are configured in the same manner as the rotation limiting mechanism 24 of the first embodiment are denoted by the same reference numerals.
 回動制限機構510は、ワイヤ80の代わりに、可撓性を有する金属製の「連結部材」としてのベルト520を有しており、ベルト520は、長尺帯状に形成されると共に、ステアリングシャフト14の軸方向を幅方向として配置されている。ベルト520の長手方向一端部には、第1ストッパ522A(広義には、「制限部材」として把握される要素である)が設けられており、第1ストッパ522Aは、ハウジング50の軸方向を長手方向とする略矩形筒状に形成されている。そして、第1ストッパ522Aの内部にベルト520の長手方向一端部が挿入されて、第1ストッパ522Aがカシメなどによってベルト520に固定されている。また、第1ストッパ522Aは、ハウジング50に形成された固定孔50H内に嵌入して固定されており、ベルト520が第1ストッパ522Aからハウジング50の内部へ延出されている。また、第1ストッパ522Aの軸方向一端部には、第1ストッパ522Aから外側へ突出されたフランジ522A1が一体に形成されており、フランジ522A1は、ハウジング50の径方向外側において、固定孔50Hの周縁部に当接されている。 The rotation limiting mechanism 510 has a belt 520 as a metal “connecting member” having flexibility instead of the wire 80, and the belt 520 is formed in a long band shape and has a steering shaft. The fourteen axial directions are arranged in the width direction. One end of the belt 520 in the longitudinal direction is provided with a first stopper 522A (which is an element grasped as a “restricting member” in a broad sense), and the first stopper 522A extends in the axial direction of the housing 50. It is formed in a substantially rectangular tube shape with a direction. Then, one end of the belt 520 in the longitudinal direction is inserted into the first stopper 522A, and the first stopper 522A is fixed to the belt 520 by caulking or the like. Further, the first stopper 522A is fitted and fixed in a fixing hole 50H formed in the housing 50, and the belt 520 extends from the first stopper 522A to the inside of the housing 50. Further, a flange 522A1 protruding outward from the first stopper 522A is integrally formed at one axial end portion of the first stopper 522A. The flange 522A1 is formed on the outer side in the radial direction of the housing 50 with respect to the fixing hole 50H. It is in contact with the peripheral edge.
 一方、ベルト520の長手方向他端部には、第2ストッパ522B(広義には、「制限部材」として把握される要素である)が設けられており、第2ストッパ522Bは、ステアリングシャフト14の軸方向を長手方向とする略矩形筒状に形成されている。そして、第2ストッパ522Bの内部にベルト520の長手方向他端部が挿入されて、第2ストッパ522Bがカシメなどによってベルト520に固定されている。また、第2ストッパ522Bは、ステアリングシャフト14の外周部に形成された固定凹部14C内に嵌入して固定されている。これにより、ステアリングシャフト14とハウジング50とがベルト520によって連結されている。また、第1ストッパ522Aが第2ストッパ522Bに対して、ステアリングシャフト14の径方向外側に配置されている。具体的には、ステアリングホイール16の中立位置において、第1ストッパ522A及び第2ストッパ522Bは、ステアリングシャフト14の径方向において、対向して配置されている。すなわち、ベルト520の長手方向両端部が、ステアリングシャフト14の軸方向において一致する位置に配置されている。 On the other hand, a second stopper 522B (which is an element grasped as a “restricting member” in a broad sense) is provided at the other longitudinal end of the belt 520, and the second stopper 522B is provided on the steering shaft 14. It is formed in a substantially rectangular tube shape with the axial direction as the longitudinal direction. The other end in the longitudinal direction of the belt 520 is inserted into the second stopper 522B, and the second stopper 522B is fixed to the belt 520 by caulking or the like. Further, the second stopper 522B is fitted and fixed in a fixed recess 14C formed on the outer peripheral portion of the steering shaft 14. Thereby, the steering shaft 14 and the housing 50 are connected by the belt 520. Further, the first stopper 522A is disposed on the radially outer side of the steering shaft 14 with respect to the second stopper 522B. Specifically, at the neutral position of the steering wheel 16, the first stopper 522 </ b> A and the second stopper 522 </ b> B are disposed to face each other in the radial direction of the steering shaft 14. That is, both ends in the longitudinal direction of the belt 520 are arranged at positions that coincide with each other in the axial direction of the steering shaft 14.
 また、ステアリングホイール16の中立位置では、ベルト520が、ステアリングシャフト14とハウジング50との間で弛んだ状態で配置されている。そして、運転者によってステアリングホイール16が回動方向一方側(又は回動方向他方側)へ回動されると、ステアリングシャフト14が回動方向一方側(又は回動方向他方側)へ回動する。これにより、ベルト520が、ステアリングシャフト14の径方向を厚み方向としてステアリングシャフト14の外周部に巻取られる。そして、ステアリングホイール16が最大操舵位置に到達したときには、ベルト520が伸長された状態になるように、ベルト520の長手方向の長さが設定されている。これにより、ステアリングホイール16の最大操舵位置において、ステアリングシャフト14の回動が制限される。したがって、第6の実施の形態においても、回動制限機構510によってステアリングシャフト14の回動を機械的に制限することができる。 In the neutral position of the steering wheel 16, the belt 520 is disposed in a slack state between the steering shaft 14 and the housing 50. When the steering wheel 16 is turned to one side (or the other side in the turning direction) by the driver, the steering shaft 14 is turned to the one side (or the other side in the turning direction). . As a result, the belt 520 is wound around the outer periphery of the steering shaft 14 with the radial direction of the steering shaft 14 as the thickness direction. The length of the belt 520 in the longitudinal direction is set so that the belt 520 is extended when the steering wheel 16 reaches the maximum steering position. Thereby, the rotation of the steering shaft 14 is restricted at the maximum steering position of the steering wheel 16. Therefore, also in the sixth embodiment, the rotation of the steering shaft 14 can be mechanically limited by the rotation limiting mechanism 510.
 また、第6の実施の形態では、ステアリングシャフト14とハウジング50とを連結する連結部材が、略長尺帯状のベルト520によって構成されている。また、第1ストッパ522Aが第2ストッパ522Bに対して、ステアリングシャフト14の径方向外側に配置されている。これにより、ステアリングシャフト14によってベルト520を巻取るときには、ベルト520が、ステアリングシャフト14の径方向を厚み方向としてステアリングシャフト14に巻取られる。これにより、ベルト520の絡まりを抑制した状態でステアリングシャフト14によってベルト520を良好に巻取ることができる。 In the sixth embodiment, the connecting member that connects the steering shaft 14 and the housing 50 is constituted by a belt 520 having a substantially long belt shape. Further, the first stopper 522A is disposed on the radially outer side of the steering shaft 14 with respect to the second stopper 522B. Accordingly, when the belt 520 is wound around the steering shaft 14, the belt 520 is wound around the steering shaft 14 with the radial direction of the steering shaft 14 being the thickness direction. As a result, the belt 520 can be satisfactorily wound by the steering shaft 14 in a state where the tangling of the belt 520 is suppressed.
 特に、ステアリングホイール16の最大操舵角が、360°よりも大きく設定された場合には、ベルト520が、ステアリングシャフト14の径方向外側に層状に巻取られる。このため、仮に、ベルト520を、第1の実施の形態のような断面円形のワイヤ80とした場合と比べて、ベルト520をステアリングシャフト14によって良好に巻取ることができる。これにより、ベルト520の巻取状態を安定化することができる。 Particularly, when the maximum steering angle of the steering wheel 16 is set to be larger than 360 °, the belt 520 is wound in layers on the radially outer side of the steering shaft 14. For this reason, it is possible to wind the belt 520 better by the steering shaft 14 than when the belt 520 is the wire 80 having a circular cross section as in the first embodiment. Thereby, the winding state of the belt 520 can be stabilized.
 なお、第6の実施の形態では、第1ストッパ522Aがハウジング50に固定されているが、第1ストッパ522Aをハウジング50の径方向外側に配置して、ハウジング50の固定孔50Hの周縁部に係合可能に構成してもよい。この場合には、第3の実施の形態と同様に、第1ストッパ522Aをハウジング50の径方向外側へ付勢する付勢部材を設けてもよい。これにより、第3の実施の形態と同様に、ステアリングホイール16が最大操舵位置の手前において、ステアリングホイール16の操舵力を高くすることができる。 In the sixth embodiment, the first stopper 522A is fixed to the housing 50. However, the first stopper 522A is arranged on the outer side in the radial direction of the housing 50, and is arranged at the peripheral portion of the fixing hole 50H of the housing 50. You may comprise so that engagement is possible. In this case, a biasing member that biases the first stopper 522A outward in the radial direction of the housing 50 may be provided as in the third embodiment. Thereby, similarly to the third embodiment, the steering force of the steering wheel 16 can be increased before the steering wheel 16 is at the maximum steering position.
 また、第6の実施の形態では、ステアリングホイール16の中立位置において、ベルト520が弛む状態になるように設定されているが、ステアリングホイール16の中立位置において、ベルト520が弛みのない状態となるように構成してもよい。例えば、ハウジング50の径方向外側に、ハウジング50と平行を成す巻取軸を設けて、当該巻取軸を、ブラケットなどを介して、ハウジング50に回動可能に支持させる。さらに、ベルト520の長手方向一方側の端部を巻取軸に固定する。これにより、巻取軸が回動方向一方側へ回動することで、ベルト520が巻取軸に巻き取られ、ベルト520を引出すことで、巻取軸が回動方向他方側へ回動される。さらに、巻取軸の軸方向一端部に、巻取軸を回動方向一方側へ付勢するぜんまいばね等の付勢部材を設ける。これにより、ステアリングホイール16の中立位置において、ベルト520が弛みのない状態で巻取軸から延出される。その結果、ハウジング50とステアリングシャフト14との間に、弛んだ状態のベルト520が配置されることが抑制されるため、ベルト520とステアリングシャフト14及びハウジング50との当りによる異音の発生を抑制することができる。 Further, in the sixth embodiment, the belt 520 is set in a slack state at the neutral position of the steering wheel 16, but the belt 520 is in a state without slack at the neutral position of the steering wheel 16. You may comprise as follows. For example, a winding shaft that is parallel to the housing 50 is provided outside the housing 50 in the radial direction, and the winding shaft is rotatably supported by the housing 50 via a bracket or the like. Furthermore, the end of one side in the longitudinal direction of the belt 520 is fixed to the winding shaft. As a result, the winding shaft is rotated to one side in the rotation direction, whereby the belt 520 is wound around the winding shaft, and the winding shaft is rotated to the other side in the rotation direction by pulling out the belt 520. The Furthermore, an urging member such as a mainspring spring that urges the winding shaft to one side in the rotational direction is provided at one axial end of the winding shaft. Thereby, in the neutral position of the steering wheel 16, the belt 520 is extended from the winding shaft in a state without slack. As a result, the slackened belt 520 is prevented from being disposed between the housing 50 and the steering shaft 14, so that the generation of noise due to the contact between the belt 520, the steering shaft 14 and the housing 50 is suppressed. can do.
(第7の実施の形態)
 以下、図17を用いて、第7の実施の形態のステアリング装置600について説明する。ステアリング装置600では、操舵装置12における回動制限機構610を除いて第3の実施の形態と同様に構成されている。なお、図17では、回動制限機構610において、第3の実施の形態の回動制限機構210と同様に構成された部材には、同一の符号を付している。
(Seventh embodiment)
Hereinafter, the steering apparatus 600 according to the seventh embodiment will be described with reference to FIG. The steering device 600 is configured in the same manner as in the third embodiment except for the rotation limiting mechanism 610 in the steering device 12. In FIG. 17, in the rotation limiting mechanism 610, members that are configured in the same manner as the rotation limiting mechanism 210 of the third embodiment are denoted by the same reference numerals.
 第7の実施の形態における回動制限機構610は、第2連結軸70の代わりにナット620を有している。また、回動制限機構610は、ナット620をステアリングシャフト14に連結させるためのネジ機構630と、「第1連結部材」としての第1ワイヤ90と、「第2連結部材」としての第2ワイヤ94と、を含んで構成されている。 The rotation limiting mechanism 610 in the seventh embodiment has a nut 620 instead of the second connecting shaft 70. The rotation limiting mechanism 610 includes a screw mechanism 630 for connecting the nut 620 to the steering shaft 14, a first wire 90 as a “first connecting member”, and a second wire as a “second connecting member”. 94.
 ナット620は、略円筒状に形成されており、ナット620の内径寸法は、ステアリングシャフト14の外径寸法と比べて僅かに大きく設定されて、ナット620の内部にステアリングシャフト14が挿通されている。また、ナット620は、ハウジング50に対して相対回動不能に、且つ軸方向に相対移動可能に、ハウジング50に支持されている。すなわち、ナット620の外周部には、ナット620の軸方向に延在されたキー溝(図示省略)が形成されており、ハウジング50の内周部には、当該キー溝内に配置されたキー(図示省略)が設けられている。 The nut 620 is formed in a substantially cylindrical shape. The inner diameter dimension of the nut 620 is set slightly larger than the outer diameter dimension of the steering shaft 14, and the steering shaft 14 is inserted into the nut 620. . Further, the nut 620 is supported by the housing 50 so as not to rotate relative to the housing 50 and to be relatively movable in the axial direction. That is, a key groove (not shown) extending in the axial direction of the nut 620 is formed on the outer peripheral portion of the nut 620, and a key disposed in the key groove is formed on the inner peripheral portion of the housing 50. (Not shown) is provided.
 また、ナット620には、2箇所のワイヤ挿通孔622(広義には、「ナット側挿通孔」として把握される要素である)が軸方向に貫通形成されている。このワイヤ挿通孔622は、ナット620の中心点CPに対して、点対称となるように構成されている。すなわち、一対のワイヤ挿通孔622は、ナット620の周方向において、180°離間した位置に配置されている。また、ワイヤ挿通孔622は、第3の実施の形態の第2連結軸70に形成されたワイヤ挿通孔72と同様に構成されている。すなわち、ワイヤ挿通孔622の軸方向両側の開口部には、傾斜面によって構成された面取部622A,622Bが形成されている。 The nut 620 has two wire insertion holes 622 (elements grasped as “nut-side insertion holes” in a broad sense) penetrating in the axial direction. The wire insertion hole 622 is configured to be point symmetric with respect to the center point CP of the nut 620. In other words, the pair of wire insertion holes 622 are disposed at positions separated by 180 ° in the circumferential direction of the nut 620. Further, the wire insertion hole 622 is configured in the same manner as the wire insertion hole 72 formed in the second connecting shaft 70 of the third embodiment. That is, chamfered portions 622 </ b> A and 622 </ b> B each formed by an inclined surface are formed in the openings on both sides in the axial direction of the wire insertion hole 622.
 ネジ機構630は、ボールネジ機構として構成されており、ステアリングシャフト14の回動運動を直線運動に変換して、ナット620をステアリングシャフト14の軸方向に移動させるようになっている。すなわち、ネジ機構630は、ステアリングシャフト14の外周部に形成された螺旋状のネジ溝部632と、ナット620の内周部に形成された螺旋状のネジ溝部634と、ナット620とステアリングシャフト14との間においてネジ溝部632及びネジ溝部634内に配置されたボール646と、を含んで構成されている。これにより、ステアリングシャフト14が回動方向一方側または他方側へ回動されることで、ナット620がステアリングシャフト14の軸方向一方側または他方側へ移動するように構成されている。 The screw mechanism 630 is configured as a ball screw mechanism, and converts the rotational motion of the steering shaft 14 into a linear motion to move the nut 620 in the axial direction of the steering shaft 14. That is, the screw mechanism 630 includes a helical screw groove 632 formed on the outer peripheral portion of the steering shaft 14, a helical screw groove 634 formed on the inner peripheral portion of the nut 620, the nut 620, the steering shaft 14, and the like. And a ball 646 disposed in the screw groove 634 between the screw groove 632 and the screw groove 634. Accordingly, the nut 620 is configured to move to one side or the other side in the axial direction of the steering shaft 14 by turning the steering shaft 14 to one side or the other side in the turning direction.
 一方、ハウジング50には、一対の第1連結軸60が設けられており、一対の第1連結軸60は、一対のワイヤ挿通孔622に対応して配置されている。具体的には、一方の第1連結軸60が、一方のワイヤ挿通孔622と対を成して、当該ワイヤ挿通孔622に対してステアリングシャフト14の軸方向一方側に配置されている。また、他方の第1連結軸60が、他方のワイヤ挿通孔622と対を成して、当該ワイヤ挿通孔622に対してステアリングシャフト14の軸方向他方側に配置されている。そして、対を成す第1連結軸60のワイヤ挿通孔62とワイヤ挿通孔622とが、同軸上に配置されている。さらに、ハウジング50には、一対の保持壁50Cが一体に形成されており、保持壁50Cは、一対の第1連結軸60に対応して、第1連結軸60に対してナット620とは反対側の位置に配置されている。 On the other hand, the housing 50 is provided with a pair of first connection shafts 60, and the pair of first connection shafts 60 are disposed corresponding to the pair of wire insertion holes 622. Specifically, one first connecting shaft 60 forms a pair with one wire insertion hole 622 and is disposed on one side in the axial direction of the steering shaft 14 with respect to the wire insertion hole 622. Further, the other first connecting shaft 60 forms a pair with the other wire insertion hole 622 and is disposed on the other axial side of the steering shaft 14 with respect to the wire insertion hole 622. And the wire insertion hole 62 and the wire insertion hole 622 of the 1st connecting shaft 60 which make a pair are arrange | positioned coaxially. Further, the housing 50 is integrally formed with a pair of holding walls 50 </ b> C, and the holding walls 50 </ b> C are opposite to the nuts 620 with respect to the first connection shaft 60 corresponding to the pair of first connection shafts 60. It is arranged at the side position.
 第1ワイヤ90及び第2ワイヤ94は、同一形状に形成されると共に、第1の実施の形態のワイヤ80と同様に構成されている。すなわち、第1ワイヤ90(第2ワイヤ94)の長手方向両側の端部には、ストッパ92A,92B(ストッパ96A,96B)が固定されており、ストッパ92A,92B(ストッパ96A,96B)は、ワイヤ80のストッパ82A,82Bと同様に構成されている。そして、第1ワイヤ90及び第2ワイヤ94は、対を成す第1連結軸60(のワイヤ挿通孔62)及びワイヤ挿通孔622を連結しており、第1ワイヤ90(第2ワイヤ94)のストッパ92A(ストッパ96A)が、第1連結軸60側に配置されている。また、ステアリングホイール16の中立位置では、第1ワイヤ90及び第2ワイヤ94が、弛んだ状態で、対を成す第1連結軸60(のワイヤ挿通孔62)及びワイヤ挿通孔622を連結するように、ワイヤ80の長手方向の長さが設定されている。また、第1ワイヤ90及び第2ワイヤ94には、それぞれ圧縮コイルばね212が装着されており、圧縮コイルばね212は、ストッパ92A(ストッパ96A)と第1連結軸60との間に配置されている。 The first wire 90 and the second wire 94 are formed in the same shape and are configured in the same manner as the wire 80 of the first embodiment. That is, stoppers 92A and 92B ( stoppers 96A and 96B) are fixed to ends of both sides in the longitudinal direction of the first wire 90 (second wire 94), and the stoppers 92A and 92B ( stoppers 96A and 96B) It is configured in the same manner as the stoppers 82A and 82B of the wire 80. The first wire 90 and the second wire 94 connect the paired first connecting shaft 60 (the wire insertion hole 62) and the wire insertion hole 622, and the first wire 90 (the second wire 94) is connected. A stopper 92A (stopper 96A) is disposed on the first connecting shaft 60 side. Further, at the neutral position of the steering wheel 16, the first wire 90 and the second wire 94 are loosened so as to connect the paired first connection shaft 60 (the wire insertion hole 62) and the wire insertion hole 622. Further, the length of the wire 80 in the longitudinal direction is set. The first wire 90 and the second wire 94 are each provided with a compression coil spring 212, and the compression coil spring 212 is disposed between the stopper 92 </ b> A (stopper 96 </ b> A) and the first connecting shaft 60. Yes.
 そして、運転者によってステアリングホイール16が回動方向一方側へ回動されると、ステアリングシャフト14が回動方向一方側へ回動して、ナット620がネジ機構630によって軸方向一方側(図17の矢印A方向側)へ移動する。このため、ナット620が、一方の第1連結軸60に対して接近すると共に、他方の第1連結軸60に対して離間する。すなわち、第1ワイヤ90が、一層弛んだ状態となると共に、第2ワイヤ94が、ステアリングシャフト14の径方向外側において、長手方向に伸長されるように延びる。 Then, when the steering wheel 16 is turned to one side in the turning direction by the driver, the steering shaft 14 is turned to one side in the turning direction, and the nut 620 is turned to one side in the axial direction by the screw mechanism 630 (FIG. 17). To the arrow A direction side). For this reason, the nut 620 approaches the one first connecting shaft 60 and is separated from the other first connecting shaft 60. That is, the first wire 90 is further loosened, and the second wire 94 extends so as to extend in the longitudinal direction on the radially outer side of the steering shaft 14.
 そして、ステアリングホイール16が最大操舵位置の手前に到達したときには、第2ワイヤ94が伸長された状態になり、第2ワイヤ94に装着された圧縮コイルばね212の付勢力がワイヤ80を介してナット620に作用する。この状態からステアリングホイール16が、回動方向一方側へさらに回動されると、ナット620が、当該圧縮コイルばね212の付勢力に抗して、第2ワイヤ94を長手方向に引張る。これにより、第2ワイヤ94のストッパ96Bが、保持壁50Cからハウジング50の軸方向一方側へ離間して、ナット620の移動が許容される。そして、ステアリングホイール16の最大操舵位置では、ナット620が図1に示される1点鎖線で示される位置に配置される。このときには、第2ワイヤ94に装着された圧縮コイルばね212の圧縮変形が完了して、ストッパ82Aにおけるハウジング50の軸方向一方側への移動が、第1連結軸60によって制限される。これにより、ナット620の移動が制限されると共に、ステアリングシャフト14(ステアリングホイール16)の回動が制限される。 When the steering wheel 16 reaches the position before the maximum steering position, the second wire 94 is extended, and the urging force of the compression coil spring 212 attached to the second wire 94 is applied to the nut via the wire 80. Act on 620. When the steering wheel 16 is further rotated to one side in the rotation direction from this state, the nut 620 pulls the second wire 94 in the longitudinal direction against the urging force of the compression coil spring 212. As a result, the stopper 96B of the second wire 94 is separated from the holding wall 50C toward the one axial side of the housing 50, and the movement of the nut 620 is allowed. And in the maximum steering position of the steering wheel 16, the nut 620 is arrange | positioned in the position shown with the dashed-dotted line shown by FIG. At this time, the compression deformation of the compression coil spring 212 attached to the second wire 94 is completed, and the first connecting shaft 60 limits the movement of the stopper 82 </ b> A to the one axial side of the housing 50. Thereby, the movement of the nut 620 is restricted and the rotation of the steering shaft 14 (steering wheel 16) is restricted.
 一方、運転者によってステアリングホイール16が回動方向他方側へ回動されると、ステアリングシャフト14が回動方向他方側へ回動して、ナット620がネジ機構630によって軸方向他方側(図17の矢印B方向側)へ移動する。このため、ナット620が、一方の第1連結軸60に対して離間すると共に、他方の第1連結軸60に対して接近する。すなわち、第2ワイヤ94が一層弛んだ状態になると共に、第1ワイヤ90が、ステアリングシャフト14の径方向外側において、長手方向に伸長されるように延びる。 On the other hand, when the steering wheel 16 is turned to the other side in the turning direction by the driver, the steering shaft 14 is turned to the other side in the turning direction, and the nut 620 is moved to the other side in the axial direction by the screw mechanism 630 (FIG. 17). To the arrow B direction side). For this reason, the nut 620 moves away from the one first connecting shaft 60 and approaches the other first connecting shaft 60. That is, the second wire 94 is further loosened, and the first wire 90 extends so as to extend in the longitudinal direction on the radially outer side of the steering shaft 14.
 そして、ステアリングホイール16が最大操舵位置の手前に到達したときには、第1ワイヤ90が伸長された状態になり、第1ワイヤ90に装着された圧縮コイルばね212の付勢力がワイヤ80を介してナット620に作用する。この状態からステアリングホイール16が、回動方向他方側へさらに回動されると、ナット620が、当該圧縮コイルばね212の付勢力に抗して、第1ワイヤ90を長手方向に引張る。これにより、第1ワイヤ90のストッパ92Aが、保持壁50Cからハウジング50の軸方向他方側へ離間して、ナット620の移動が許容される。そして、ステアリングホイール16の最大操舵位置では、ナット620が図17に示される2点鎖線で示される位置に配置される。このときには、第1ワイヤ90に装着された圧縮コイルばね212の圧縮変形が完了して、ストッパ92Aにおけるハウジング50の軸方向他方側への移動が、第1連結軸60によって制限される。これにより、ナット620の移動が制限されると共に、ステアリングシャフト14(ステアリングホイール16)の回動が制限される。 When the steering wheel 16 reaches the position before the maximum steering position, the first wire 90 is extended, and the urging force of the compression coil spring 212 attached to the first wire 90 is applied to the nut via the wire 80. Act on 620. When the steering wheel 16 is further rotated to the other side in the rotation direction from this state, the nut 620 pulls the first wire 90 in the longitudinal direction against the urging force of the compression coil spring 212. Thereby, the stopper 92A of the first wire 90 is separated from the holding wall 50C to the other axial side of the housing 50, and the movement of the nut 620 is allowed. And in the maximum steering position of the steering wheel 16, the nut 620 is arrange | positioned in the position shown with the dashed-two dotted line shown by FIG. At this time, the compression deformation of the compression coil spring 212 attached to the first wire 90 is completed, and the first connecting shaft 60 restricts the movement of the stopper 92A to the other side in the axial direction of the housing 50. Thereby, the movement of the nut 620 is restricted and the rotation of the steering shaft 14 (steering wheel 16) is restricted.
 以上により、第7の実施の形態においても、ステアリングシャフト14の回動を回動制限機構610によって機械的に制限することができる。 As described above, also in the seventh embodiment, the rotation of the steering shaft 14 can be mechanically limited by the rotation limiting mechanism 610.
 また、第7の実施の形態では、第3の実施の形態と同様に、ステアリングホイール16の最大操舵位置の手前から最大操舵位置までの間における操舵力を、高くすることができる。また、第7の実施の形態では、第1ワイヤ90、第2ワイヤ94、及び圧縮コイルばね212を用いてステアリングホイール16の操舵力を高くしているため、ナット620及びネジ機構630を用いた回動制限機構において、ステアリングホイール16の操舵力を安定的に高くすることができる。 In the seventh embodiment, as in the third embodiment, the steering force between the front of the maximum steering position of the steering wheel 16 and the maximum steering position can be increased. In the seventh embodiment, since the steering force of the steering wheel 16 is increased using the first wire 90, the second wire 94, and the compression coil spring 212, the nut 620 and the screw mechanism 630 are used. In the rotation limiting mechanism, the steering force of the steering wheel 16 can be stably increased.
 すなわち、ナット及びネジ機構を用いた回動制限機構では、摩擦力を活用して、ステアリングホイール16の操舵力を高くする構造(以下、構造1という)が考えられる。例えば、ハウジング50の内周面の一部に他の部分に対して面粗さを粗くした面粗部を形成して、ナット620の外周部と面粗部との間に生じる摩擦力を活用して、ステアリングホイール16の最大操舵位置の手前における操舵力を高くすることができる。しかしながら、この場合には、ナット620の面粗部上の摺動によって、面粗部が磨耗する可能性がある。これにより、ステアリングホイール16の操舵力を安定的に高くすることができなくなる虞がある。 That is, in the rotation limiting mechanism using the nut and screw mechanism, a structure (hereinafter, referred to as structure 1) in which the steering force of the steering wheel 16 is increased by using the frictional force can be considered. For example, a rough surface portion having a rough surface with respect to other portions is formed on a part of the inner peripheral surface of the housing 50, and the frictional force generated between the outer peripheral portion and the rough surface portion of the nut 620 is utilized. Thus, the steering force before the maximum steering position of the steering wheel 16 can be increased. However, in this case, the rough surface portion may be worn by sliding on the rough surface portion of the nut 620. Thereby, there is a possibility that the steering force of the steering wheel 16 cannot be increased stably.
 これに対して、第7の実施の形態では、第1ワイヤ90、第2ワイヤ94に装着された圧縮コイルばね212の付勢力を用いて、ステアリングホイール16の操舵力を高くする構成になっている。このため、上記構造1と比べて、ステアリングホイール16の操舵力を安定的に高くすることができる。 In contrast, in the seventh embodiment, the urging force of the compression coil spring 212 attached to the first wire 90 and the second wire 94 is used to increase the steering force of the steering wheel 16. Yes. For this reason, compared with the said structure 1, the steering force of the steering wheel 16 can be stably made high.
 さらに、第7の実施の形態では、ナット620と第1連結軸60とを連結する第1ワイヤ90又は第2ワイヤ94が伸長されることで、最大操舵位置における、ナット620の移動を制限して、ステアリングホイール16の回動を制限している。このため、ステアリングホイール16が最大操舵位置に到達したときの異音の発生を抑制することができる。 Furthermore, in the seventh embodiment, the movement of the nut 620 at the maximum steering position is limited by extending the first wire 90 or the second wire 94 that connects the nut 620 and the first connecting shaft 60. Thus, the rotation of the steering wheel 16 is limited. For this reason, generation | occurrence | production of unusual noise when the steering wheel 16 reaches | attains the maximum steering position can be suppressed.
 すなわち、ナット620及びネジ機構630を用いた構造では、例えば、ステアリングホイール16の最大操舵位置において、ハウジング50に設けられたストッパ壁にナット620を当接させることで、ナット620の移動を制限する構造(以下、構造2という)が考えられる。この構造2では、最大操舵位置において、ナット620がストッパ壁に当接することによる、比較的大きな異音が発生する可能性がある。 That is, in the structure using the nut 620 and the screw mechanism 630, the movement of the nut 620 is limited by bringing the nut 620 into contact with the stopper wall provided in the housing 50 at the maximum steering position of the steering wheel 16, for example. A structure (hereinafter referred to as structure 2) is conceivable. In this structure 2, there is a possibility that a relatively large noise is generated due to the nut 620 coming into contact with the stopper wall at the maximum steering position.
 これに対して、第7の実施の形態では、ステアリングホイール16の最大操舵位置において、ナット620のステアリングシャフト14に対する相対移動を、伸長された第1ワイヤ90又は第2ワイヤ94によって引止めるように作用する。これにより、上記構造2のように、ナット620をストッパ壁に当てる必要がなくなるため、上記構造2と比べて異音の発生を抑制することができる。 On the other hand, in the seventh embodiment, the relative movement of the nut 620 with respect to the steering shaft 14 is restrained by the elongated first wire 90 or the second wire 94 at the maximum steering position of the steering wheel 16. Works. Accordingly, unlike the structure 2, it is not necessary to apply the nut 620 to the stopper wall, so that the generation of abnormal noise can be suppressed compared to the structure 2.
 さらに、ナット620のステアリングシャフト14に対する相対移動を、伸長された第1ワイヤ90又は第2ワイヤ94によって引き止める構成にすることで、上記構造2の場合と比べて、ステアリングシャフト14を最大操舵位置から中立位置側へスムースに逆回動させることができる。 Furthermore, the relative movement of the nut 620 with respect to the steering shaft 14 is configured to be retained by the elongated first wire 90 or the second wire 94, so that the steering shaft 14 can be moved from the maximum steering position as compared with the case of the structure 2. It can be smoothly rotated backward to the neutral position side.
 すなわち、上記構造2の場合では、ナット620の軸方向の端面と、ストッパ壁と、が面で当接される構造になる。このため、ステアリングホイール16の最大操舵位置において、ステアリングホイール16に比較的高い操舵力が付与された場合には、ナット620の軸方向の端面と、ストッパ壁と、の間に、比較的高い摩擦力が生じる可能性がある。このため、ステアリングホイール16の最大操舵位置から復帰させるときに、ナット620がストッパ壁にくい付くように作用して、ステアリングシャフト14が中立位置側へスムースに逆回動しない可能性がある。 That is, in the case of the structure 2, the axial end surface of the nut 620 and the stopper wall are in contact with each other on the surface. Therefore, when a relatively high steering force is applied to the steering wheel 16 at the maximum steering position of the steering wheel 16, a relatively high friction is generated between the axial end surface of the nut 620 and the stopper wall. Power can be generated. For this reason, when the steering wheel 16 is returned from the maximum steering position, the nut 620 acts so as to be hard to the stopper wall, and the steering shaft 14 may not smoothly rotate backward to the neutral position side.
 これに対して、第7の実施の形態では、上述のように、ステアリングホイール16の最大操舵位置において、ナット620のステアリングシャフト14に対する相対移動を、伸長された第1ワイヤ90又は第2ワイヤ94によって引き止めるように作用する。これにより、上記構造2のように、ナット620の軸方向の端面と、ストッパ壁と、を面で当接させる必要がなくなる。このため、上記構造2と比べて、ステアリングシャフト14を最大操舵位置から中立位置側へスムースに逆回動させることができる。 On the other hand, in the seventh embodiment, as described above, the relative movement of the nut 620 with respect to the steering shaft 14 at the maximum steering position of the steering wheel 16 is caused to extend the first wire 90 or the second wire 94. Acts to hold on. This eliminates the need for the end face of the nut 620 in the axial direction and the stopper wall to be in contact with each other as in the structure 2 described above. For this reason, compared with the said structure 2, the steering shaft 14 can be reversely rotated smoothly from the maximum steering position to the neutral position side.
 なお、第7の実施の形態では、ネジ機構630をボールネジ機構として構成して、ナット620をステアリングシャフト14の軸方向に移動可能に構成している。これに代えて、ナット620とステアリングシャフト14とをネジ結合にして、ナット620をステアリングシャフト14の軸方向に移動可能に構成してもよい。すなわち、ネジ機構630を、ステアリングシャフト14の外周部に形成された雄ネジ部と、ナット620の内周部に形成され且つ雄ネジ部と螺合される雌ネジ部と、を含んで構成してもよい。 In the seventh embodiment, the screw mechanism 630 is configured as a ball screw mechanism, and the nut 620 is configured to be movable in the axial direction of the steering shaft 14. Alternatively, the nut 620 and the steering shaft 14 may be screwed together so that the nut 620 can be moved in the axial direction of the steering shaft 14. That is, the screw mechanism 630 includes a male screw portion formed on the outer peripheral portion of the steering shaft 14 and a female screw portion formed on the inner peripheral portion of the nut 620 and screwed with the male screw portion. May be.
 また、回動制限機構610では、第1ワイヤ90及び第2ワイヤ94が、それぞれ1本ずつに設定されているが、第1ワイヤ90及び第2ワイヤ94を、それぞれ複数本に設定してもよい。 Further, in the rotation limiting mechanism 610, the first wire 90 and the second wire 94 are each set to one, but the first wire 90 and the second wire 94 may be set to a plurality of each. Good.
 さらに、回動制限機構610では、第1ワイヤ90及び第2ワイヤ94を含んで構成されているが、回動制限機構610において、第1ワイヤ90及び第2ワイヤ94の一方を省略してもよい。また、第1ワイヤ90(第2ワイヤ94)を省略する場合には、ステアリングホイール16の最大操舵位置において、ナット620に当接し且つステアリングホイール16の回動方向他方側(回動方向一方側)への回動を制限するストッパをハウジング50の設けてもよい。 Further, the rotation restriction mechanism 610 includes the first wire 90 and the second wire 94. However, in the rotation restriction mechanism 610, one of the first wire 90 and the second wire 94 may be omitted. Good. Further, when the first wire 90 (second wire 94) is omitted, the steering wheel 16 is in contact with the nut 620 at the maximum steering position and the other side of the steering wheel 16 in the rotational direction (one side in the rotational direction). The housing 50 may be provided with a stopper that restricts the rotation of the housing 50.
 なお、第1~第5の実施の形態、及び第7の実施の形態では、ワイヤ80及びベルト520が可撓性を有する金属製とされているが、ワイヤ80及びベルト520の材質はこれに限らない。例えば、ワイヤ80及びベルト520を布製にしてもよい。つまり、ワイヤ80及びベルト520が、可撓性を有すると共に、所定の引張強度を有するものであればよい。 In the first to fifth embodiments and the seventh embodiment, the wire 80 and the belt 520 are made of flexible metal, but the material of the wire 80 and the belt 520 is not limited to this. Not exclusively. For example, the wire 80 and the belt 520 may be made of cloth. That is, the wire 80 and the belt 520 may be flexible and have a predetermined tensile strength.
 また、第1~第5の実施の形態、及び第7の実施の形態では、ワイヤ80、第1ワイヤ90、及び第2ワイヤ94の径寸法を特に規定していないが、ワイヤ80、第1ワイヤ90、及び第2ワイヤ94の径寸法は、任意に設定可能である。さらに、第6の実施の形態では、ベルト520の幅寸法及び厚み寸法を特に規定していないが、ベルト520の幅寸法及び厚み寸法は、任意に設定可能である。 In the first to fifth embodiments and the seventh embodiment, the diameters of the wire 80, the first wire 90, and the second wire 94 are not particularly defined. The diameter dimensions of the wire 90 and the second wire 94 can be arbitrarily set. Furthermore, in the sixth embodiment, the width dimension and the thickness dimension of the belt 520 are not particularly defined, but the width dimension and the thickness dimension of the belt 520 can be arbitrarily set.
 以上、第1の実施の形態~第7の実施の形態について説明したが、これらの実施形態によれば、ステアリングホイールの回動を機械的に制限することができる。 The first to seventh embodiments have been described above, but according to these embodiments, the rotation of the steering wheel can be mechanically limited.
 以上、この発明の実施形態につき、図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計等も含まれる。また、第1~第7の実施の形態を適宜組み合わせて適用してもよい。 As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes designs and the like that do not depart from the gist of the present invention. Also, the first to seventh embodiments may be applied in appropriate combination.
10       ステアリング装置
14       ステアリングシャフト
16       ステアリングホイール
50       ハウジング
50A     ワイヤ挿通孔(挿通孔)
50C    保持壁(保持部)
60       第1連結軸(ハウジング側連結部)
62       ワイヤ挿通孔(第1挿通孔)
70       第2連結軸(シャフト側連結部)
72       ワイヤ挿通孔(第2挿通孔)
80       ワイヤ(連結部材)
90       ワイヤ(第1連結部材)
94       ワイヤ(第2連結部材)
100     ステアリング装置
200     ステアリング装置
212     圧縮コイルばね(付勢部材)
300     ステアリング装置
312     可変機構
320     スライダ
324     駆動力伝達機構
340     モータ(駆動部)
350     巻取軸
358     駆動力伝達機構
360     支持ハウジング(支持部材)
362     駆動力伝達機構
382     駆動力伝達機構
400     ステアリング装置
412     センサ(破断検出部)
420     報知部(報知装置)
500     ステアリング装置
520     ベルト(連結部材)
500     ステアリング装置
620     ナット
630     ネジ機構
DESCRIPTION OF SYMBOLS 10 Steering device 14 Steering shaft 16 Steering wheel 50 Housing 50A Wire insertion hole (insertion hole)
50C Retaining wall (holding part)
60 First connecting shaft (housing side connecting part)
62 Wire insertion hole (first insertion hole)
70 Second connecting shaft (shaft side connecting part)
72 Wire insertion hole (second insertion hole)
80 wires (connection members)
90 wire (first connecting member)
94 wire (second connecting member)
DESCRIPTION OF SYMBOLS 100 Steering device 200 Steering device 212 Compression coil spring (biasing member)
300 Steering device 312 Variable mechanism 320 Slider 324 Driving force transmission mechanism 340 Motor (driving unit)
350 Winding shaft 358 Driving force transmission mechanism 360 Support housing (support member)
362 Driving force transmission mechanism 382 Driving force transmission mechanism 400 Steering device 412 Sensor (rupture detection unit)
420 Notification Unit (Notification Device)
500 Steering device 520 Belt (connection member)
500 Steering device 620 Nut 630 Screw mechanism

Claims (14)

  1.  ステアリングホイールの操舵に伴って回動するステアリングシャフトと、
     前記ステアリングシャフトを径方向外側から覆うハウジングと、
     可撓性を有する長尺状に形成され、前記ステアリングシャフト及び前記ハウジングを連結すると共に、前記ステアリングホイールが中立位置から最大操舵位置へ操舵されたときに伸長した状態で前記ステアリングシャフトに巻付けられて前記ステアリングシャフトの回動方向一方側または回動方向他方側の回動を制限する連結部材と、
     を備えたステアリング装置。
    A steering shaft that rotates as the steering wheel steers,
    A housing that covers the steering shaft from a radially outer side;
    It is formed in a long and flexible shape, connects the steering shaft and the housing, and is wound around the steering shaft in an extended state when the steering wheel is steered from a neutral position to a maximum steering position. A connecting member for restricting the rotation of the steering shaft on one side or the other side of the rotation direction;
    Steering device with
  2.  前記連結部材の長手方向両端部が、前記ステアリングシャフトの軸方向に離間して配置されており、
     前記ステアリングシャフトが中立位置から回動されたときには、前記連結部材が前記ステアリングシャフトの外周部に螺旋状に巻付けられる請求項1に記載のステアリング装置。
    Both ends in the longitudinal direction of the connecting member are arranged apart from each other in the axial direction of the steering shaft,
    The steering apparatus according to claim 1, wherein when the steering shaft is rotated from a neutral position, the connecting member is spirally wound around an outer peripheral portion of the steering shaft.
  3.  前記ハウジングには、前記ハウジングから前記ステアリングシャフト側へ突出され且つ前記連結部材をハウジングに連結するハウジング側連結部が設けられ、
     前記ステアリングシャフトには、前記ステアリングシャフトから前記ハウジング側へ突出され且つ前記連結部材を前記ステアリングシャフトに連結するシャフト側連結部が設けられ、
     前記連結部材は、断面円形状に形成されており、前記ハウジング側連結部と前記ステアリングシャフトとの間の隙間及び前記シャフト側連結部と前記ハウジングとの間の隙間が、前記連結部材の外径と比べて小さく設定されている請求項2に記載のステアリング装置。
    The housing is provided with a housing side connecting portion that protrudes from the housing toward the steering shaft and connects the connecting member to the housing.
    The steering shaft is provided with a shaft side connecting portion that protrudes from the steering shaft toward the housing and connects the connecting member to the steering shaft.
    The connecting member is formed in a circular cross section, and a gap between the housing side connecting portion and the steering shaft and a gap between the shaft side connecting portion and the housing are outside diameters of the connecting member. The steering device according to claim 2, wherein the steering device is set to be smaller than the steering device.
  4.  前記ハウジング側連結部には、前記ステアリングシャフトの軸方向に貫通され且つ前記連結部材が挿通される第1挿通孔が形成され、前記シャフト側連結部には、前記ステアリングシャフトの軸方向に貫通され且つ前記連結部材が挿通される第2挿通孔が形成されており、
     前記ハウジング側連結部が、前記ステアリングシャフトの径方向を軸方向として前記ハウジングに回動可能に支持され、
     前記シャフト側連結部が、前記ステアリングシャフトの径方向を軸方向として前記ステアリングシャフトに回動可能に支持されている請求項3に記載のステアリング装置。
    The housing side coupling portion is formed with a first insertion hole that penetrates in the axial direction of the steering shaft and through which the coupling member is inserted, and the shaft side coupling portion penetrates in the axial direction of the steering shaft. And a second insertion hole is formed through which the connecting member is inserted,
    The housing side connecting portion is rotatably supported by the housing with the radial direction of the steering shaft as an axial direction,
    The steering device according to claim 3, wherein the shaft-side connecting portion is rotatably supported by the steering shaft with a radial direction of the steering shaft as an axial direction.
  5.  前記連結部材が、前記ステアリングシャフト及び前記ハウジングの少なくとも一方とボールジョイントによって連結されている請求項3に記載のステアリング装置。 The steering device according to claim 3, wherein the connecting member is connected to at least one of the steering shaft and the housing by a ball joint.
  6.  前記連結部材の長手方向一端部が、前記ハウジングの外周部に固定されており、前記連結部材が、前記ハウジングに形成された挿通孔から前記ステアリングシャフトへ向けて延出されている請求項2に記載のステアリング装置。 The longitudinal direction one end part of the said connection member is being fixed to the outer peripheral part of the said housing, and the said connection member is extended toward the said steering shaft from the insertion hole formed in the said housing. The steering apparatus as described.
  7.  前記連結部材が、帯状に形成されると共に、前記ステアリングシャフトの軸方向において、前記連結部材の長手方向両端部の位置が一致しており、
     前記ステアリングシャフトが中立位置から回動されたときには、前記連結部材が前記ステアリングシャフトの径方向を厚み方向として前記ステアリングシャフトの外周部に巻付けられる請求項1に記載のステアリング装置。
    The connecting member is formed in a band shape, and in the axial direction of the steering shaft, the positions of both ends in the longitudinal direction of the connecting member are the same,
    2. The steering apparatus according to claim 1, wherein when the steering shaft is rotated from a neutral position, the connecting member is wound around an outer peripheral portion of the steering shaft with a radial direction of the steering shaft as a thickness direction.
  8.  前記連結部材の長手方向両端部の少なくとも一方には、前記連結部材を長手方向外側へ付勢する付勢部材が設けられている請求項1に記載のステアリング装置。 2. The steering device according to claim 1, wherein a biasing member that biases the connection member outward in the longitudinal direction is provided on at least one of both end portions in the longitudinal direction of the connection member.
  9.  前記ハウジングには、前記付勢部材が設けられた前記連結部材の端部を保持する保持部が設けられている請求項8に記載のステアリング装置。 The steering device according to claim 8, wherein the housing is provided with a holding portion that holds an end portion of the connecting member provided with the biasing member.
  10.  前記連結部材の長手方向一端部が、可変機構に連結されており、
     前記可変機構は、作動することによって、前記連結部材の長手方向一端部を前記ハウジングに対して相対変位させて、前記ステアリングホイールの最大操舵位置を可変にする請求項1に記載のステアリング装置。
    One end in the longitudinal direction of the connecting member is connected to a variable mechanism,
    2. The steering device according to claim 1, wherein the variable mechanism operates to displace a longitudinal end of the connecting member relative to the housing to change a maximum steering position of the steering wheel. 3.
  11.  前記ハウジングは、可変機構に連結されており、
     前記可変機構は、作動することによって、前記ハウジングを前記ステアリングシャフトに対して相対変位させて、前記ステアリングホイールの最大操舵位置を可変にする請求項1に記載のステアリング装置。
    The housing is connected to a variable mechanism;
    The steering apparatus according to claim 1, wherein the variable mechanism operates to displace the housing relative to the steering shaft so that the maximum steering position of the steering wheel is variable.
  12.  前記連結部材の破断を検出又は予知する破断検出部と、
     前記破断検出部が前記連結部材の破断を検出したとき又は前記連結部材の破断を予知したときに、その旨を報知する報知部と、
     を備えた請求項1に記載のステアリング装置。
    A break detecting unit for detecting or predicting breakage of the connecting member;
    When the rupture detection unit detects a rupture of the connecting member or when the rupture of the connecting member is predicted, a notifying unit that notifies the fact,
    The steering apparatus according to claim 1, further comprising:
  13.  前記連結部材が複数設けられている請求項1に記載のステアリング装置。 The steering device according to claim 1, wherein a plurality of the connecting members are provided.
  14.  ステアリングホイールの操舵に伴って回動するステアリングシャフトと、
     前記ステアリングシャフトを径方向外側から覆うハウジングと、
     前記ステアリングシャフトの径方向外側に設けられ、前記ステアリングシャフトの回動時にネジ機構によって前記ステアリングシャフトの軸方向に移動されるナットと、
     前記ステアリングホイールが中立位置から最大操舵位置へ回動されたときに前記ステアリングシャフトの回動方向一方側または回動方向他方側の回動を制限する回動制限機構と、
     を備え、
     前記回動制限機構は、
     可撓性を有する長尺状に形成され、前記ナットから前記ステアリングシャフトの軸方向一方側へ延在されると共に、前記ナットと前記ハウジングとを連結する第1連結部材と、
     可撓性を有する長尺状に形成され、前記ナットから前記ステアリングシャフトの軸方向他方側へ延在されると共に、前記ナットと前記ハウジングとを連結する第2連結部材と、
     のうち少なくとも一方を含んで構成されており、
     前記ステアリングホイールが中立位置から最大操舵位置へ回動されたときに、前記第1連結部材又は前記第2連結部材が長手方向に伸長されて、前記ナットの移動を制限するステアリング装置。
    A steering shaft that rotates as the steering wheel steers,
    A housing that covers the steering shaft from a radially outer side;
    A nut provided on a radially outer side of the steering shaft and moved in the axial direction of the steering shaft by a screw mechanism when the steering shaft rotates;
    A rotation limiting mechanism for limiting rotation of one side of the rotation direction of the steering shaft or the other side of the rotation direction when the steering wheel is rotated from the neutral position to the maximum steering position;
    With
    The rotation limiting mechanism is
    A first connecting member that is formed in an elongated shape having flexibility, extends from the nut to one side in the axial direction of the steering shaft, and connects the nut and the housing;
    A second connecting member that is formed in an elongated shape having flexibility, extends from the nut to the other axial side of the steering shaft, and connects the nut and the housing;
    Is configured to include at least one of
    When the steering wheel is rotated from the neutral position to the maximum steering position, the first connecting member or the second connecting member is elongated in the longitudinal direction to restrict the movement of the nut.
PCT/JP2017/042909 2017-01-24 2017-11-29 Steering apparatus WO2018139044A1 (en)

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WO2020200705A1 (en) * 2019-04-01 2020-10-08 Robert Bosch Gmbh Resetting device for a steer-by-wire steering system, and steer-by-wire steering system
WO2021005022A1 (en) * 2019-07-09 2021-01-14 Thyssenkrupp Presta Ag Steering column for a motor vehicle

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JPH0686295U (en) * 1993-05-24 1994-12-13 古河電気工業株式会社 Rotating connector
JP2005262974A (en) * 2004-03-17 2005-09-29 Japan Aviation Electronics Industry Ltd Speed reducing mechanism of steering sensor
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Publication number Priority date Publication date Assignee Title
WO2020200705A1 (en) * 2019-04-01 2020-10-08 Robert Bosch Gmbh Resetting device for a steer-by-wire steering system, and steer-by-wire steering system
WO2021005022A1 (en) * 2019-07-09 2021-01-14 Thyssenkrupp Presta Ag Steering column for a motor vehicle
CN114126950A (en) * 2019-07-09 2022-03-01 蒂森克虏伯普利斯坦股份公司 Steering column for a motor vehicle
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CN114126950B (en) * 2019-07-09 2024-03-05 蒂森克虏伯普利斯坦股份公司 Steering column for a motor vehicle

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