WO2014112196A1 - チルト式ステアリング装置 - Google Patents
チルト式ステアリング装置 Download PDFInfo
- Publication number
- WO2014112196A1 WO2014112196A1 PCT/JP2013/080948 JP2013080948W WO2014112196A1 WO 2014112196 A1 WO2014112196 A1 WO 2014112196A1 JP 2013080948 W JP2013080948 W JP 2013080948W WO 2014112196 A1 WO2014112196 A1 WO 2014112196A1
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- WIPO (PCT)
- Prior art keywords
- support plate
- thickness
- tilt
- plate portion
- steering
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/184—Mechanisms for locking columns at selected positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/187—Steering columns yieldable or adjustable, e.g. tiltable with tilt adjustment; with tilt and axial adjustment
- B62D1/189—Steering columns yieldable or adjustable, e.g. tiltable with tilt adjustment; with tilt and axial adjustment the entire column being tiltable as a unit
Definitions
- the present invention relates to an improvement of a tilt type steering apparatus for adjusting the height position of a steering wheel in accordance with a driver's physique and driving posture. Specifically, it is intended to realize a structure that can sufficiently increase the force that holds the height position of the steering wheel at the adjusted position without particularly increasing the operating force of the operating lever.
- the tilt type steering device that is the subject of the present invention includes a structure that allows only the height position of the steering wheel to be adjusted, as well as the so-called front and rear position in addition to the height position. Includes tilt and telescopic steering devices.
- the automobile steering device is configured as shown in FIG. 7, and transmits the rotation of the steering wheel 1 to the input shaft 3 of the steering gear unit 2, and a pair of left and right tie rods 4 according to the rotation of the input shaft 3, 4 is pushed and pulled to give a steering angle to the front wheels.
- the steering wheel 1 is supported and fixed at the rear end portion of the steering shaft 5, and the steering shaft 5 is rotatably supported by the steering column 6 with the cylindrical steering column 6 inserted in the axial direction.
- the front end portion of the steering shaft 5 is connected to the rear end portion of the intermediate shaft 8 via a universal joint 7, and the front end portion of the intermediate shaft 8 is connected to the input shaft 3 via another universal joint 9.
- an electric power steering device is incorporated.
- an electric motor 10 serving as a power source for applying auxiliary force is provided at the front end of the steering column 6 by supporting it on a housing 11 fixed to the front end of the steering column 6.
- the output torque (auxiliary force) of the electric motor 10 is applied to the steering shaft 5 through a gear unit or the like provided in the housing 11.
- a steering mechanism as described above incorporates a tilt mechanism for adjusting the height position of the steering wheel 1 in accordance with the physique and driving posture of the driver.
- a steering device incorporating such a tilt mechanism those having a structure as described in Patent Documents 1 to 3, for example, have been widely known.
- the conventional structure shown in FIG. 7 described above is the structure described in Patent Documents 2 to 3, but in this conventional structure, the upper front end of the housing 11 is wide with respect to the vehicle body 12.
- a tilt shaft 13 arranged in the direction (the width direction of the vehicle body on which the steering device is installed) is supported so as to be swingable and displaceable.
- a support bracket 14 is installed near the rear end of the steering column 6 (in the range excluding both ends, including the portion close to the end unlike the center), and the support bracket 14 is mounted on the vehicle body. 12 is supported.
- the support bracket 14 includes a pair of left and right support plate portions 15 spaced apart in the width direction, and the support plate portions 15 sandwich the portion near the rear end of the axial middle portion of the steering column 6 from both sides in the width direction.
- the vehicle body 12 is supported.
- a displacement bracket 16 is provided at a portion sandwiched between the support plate portions 15 on the lower surface of the intermediate portion of the steering column 6 in the axial direction.
- the support plate portions 15 are respectively provided with vertical elongated holes 17 that are arc-shaped around the tilt shaft 13 and that are long in the vertical direction.
- a part of the displacement bracket 16 is a part of both the vertical elongated holes 17.
- a through hole 18 is formed in each of the portions aligned with each other.
- the structure shown in FIG. 7 incorporates a tilt / telescopic mechanism that can adjust the front / rear position in addition to the vertical position of the steering wheel 1, so that the through-hole 18 is connected to the steering shaft 5 and the steering column 6.
- the long hole is in the axial direction.
- the steering shaft 5 and the steering column 6 have a structure that can be expanded and contracted.
- FIGS. 8 to 9 disclosed in Japanese Patent Application No. 2011-214698.
- the steering column 6 is slidably fitted to the front part of the outer column 19 arranged on the rear side and the rear part of the inner column 20 arranged on the front side so that the entire length can be expanded and contracted.
- a slit 21 is provided in the front portion of the outer column 19 made by die-casting a light alloy so that the inner diameter of the front portion can be elastically expanded and contracted.
- a pair of left and right sandwiched plate portions 22 and 22 are provided at a portion sandwiching the slit 21 from both the left and right sides, and the displacement bracket 16 is configured by the both sandwiched plate portions 22 and 22.
- through holes 18 and 18 that are long in the front-rear direction are formed in both of the sandwiched plate portions 22 and 22.
- a partial circle centered on the tilt shaft 13 is provided on a pair of left and right support plate portions 15 and 15 which are provided on the support bracket 14 and disposed in a portion sandwiching the displacement bracket 16 from the left and right sides.
- Vertically elongated holes 17 and 17 that are arc-shaped and long in the vertical direction are formed.
- a tilt flange member 23 such as a tilt bolt or a push-pull rod is inserted in the width direction through the vertical holes 17 and 17 and the through holes 18 and 18.
- an adjustment lever 24 (tilt lever) is provided at one end of the tilting saddle member 23 in the axial direction
- an anchor portion 25 is provided at the other end in the axial direction
- a cam device 26 is provided near one end of the intermediate portion in the axial direction.
- a tilt lock mechanism that expands and contracts the distance between the inner surfaces of the support plate portions 15 and 15 based on the swing of the adjusting lever 24.
- the anchor portion 25 is like a head portion of a bolt provided at the other end portion of the tilting hook-like member 23, and has a disk shape as a whole, and a first engagement protrusion formed on the inner surface.
- the portion 27 is engaged with one (right side in FIG. 9) of the vertical slot 17 so that only displacement along the vertical slot 17 is possible. Accordingly, the tilting flange-like member 23 can be moved up and down along these two vertical holes 17 and 17 but does not rotate around its own axis.
- the cam device 26 is composed of a driving cam 28 and a driven cam 29 (pressing member).
- Each of the cams 28 and 29 has a center hole through which the tilting saddle member 23 is inserted, and has a ring shape as a whole. Further, on the surfaces of the cams 28 and 29 facing each other, a driving cam surface and a driven cam surface are formed, which are uneven in the circumferential direction, respectively.
- the driven cam 29 has a second engagement convex portion 30 formed on the inner side surface (the side surface closer to the center with respect to the width direction of the steering column 6) and the other (left side in FIG. 9) length in the vertical direction.
- the holes 17 are engaged with each other so that only the displacement along the vertical elongated holes 17 is possible.
- the driven cam 29 can also be moved up and down along the vertical slot 17 but does not rotate around its own axis.
- the drive cam 28 is coupled and fixed to the base end portion of the adjustment lever 24 so that the drive cam 28 reciprocally rotates around the tilt flange member 23 as the adjustment lever 24 reciprocally swings.
- a thrust bearing is provided between the nut 31 screwed to the other end portion of the tilting flange member 23 and the outer surface of the base end portion of the adjusting lever 24 (the outer side surface in the width direction of the steering column 6). 32 is provided to allow the drive cam 28 to swing back and forth while supporting a thrust load acting on the drive cam 28.
- the nut 31 is prevented from loosening by caulking or the like.
- the axial dimension of the cam device 26 is reduced by swinging the adjustment lever 24 in a predetermined direction (generally downward), and the driven cam 29 And the anchor portion 25 are widened.
- the surface pressure of the contact portion between the inner side surfaces of the support plate portions 15 and 15 and the outer side surfaces of the sandwiched plate portions 22 and 22 is reduced or lost, and at the same time, the front end portion of the outer column 19
- the inner diameter of the outer column 19 is elastically expanded, and the contact pressure between the inner peripheral surface of the front end portion of the outer column 19 and the outer peripheral surface of the rear end portion of the inner column 20 is reduced.
- the vertical position and the front / rear position of the steering wheel 1 can be adjusted within a range in which the tilting saddle member 19 can move in the vertical holes 17, 17 and the through holes 18, 18.
- the adjusting lever 24 is swung in the reverse direction (generally upward) to increase the axial dimension of the cam device 26, and the both support plate portions. If the distance between the inner side surfaces of 15, 15 is reduced, the surface pressure of the contact portion between the inner side surfaces of the both support plate portions 15, 15 and the outer side surfaces of the both sandwiched plate portions 22, 22 increases.
- the inner diameter of the front end portion of the outer column 19 is elastically reduced, and the contact pressure between the inner peripheral surface of the front end portion of the outer column 19 and the outer peripheral surface of the rear end portion of the inner column 20 is increased.
- the steering wheel 1 can be held in the adjusted position.
- the mechanism for adjusting the force of pressing the outer surfaces of the pair of left and right support plates constituting the support bracket so that the position of the steering wheel can be adjusted, and the mechanism for holding the steering wheel at the adjusted position In addition to the structures shown in FIGS. 8 to 9, various types are known. For example, a structure that supports a tilting saddle member so as to be able to rotate about its own central axis is also known. When such a structure is adopted in accordance with the structure shown in FIGS. 8 to 9, a thrust bearing is provided between the anchor portion 25 and the outer surface of one of the support plate portions 15, and a tilt hook-like shape is provided. The base end portion of the adjusting lever 24 is coupled and fixed to the other end portion of the member 23. Further, similarly to the structure shown in FIGS.
- the first engaging convex portion 27 provided on the inner surface of the anchor portion 25 is provided in one vertical elongated hole 17 along the vertical elongated hole 17.
- the base end portion of the adjusting lever 24 is coupled and fixed to the nut 31 (pressing member) screwed to the other end portion of the tilt flange member 23.
- the nut 31 is rotated by the adjusting lever 24, and the interval between the nut 31 and the anchor portion 25 is expanded or reduced.
- the engaging convex portion can be displaced in the up-and-down direction long hole, and can be displaced along the up-and-down direction long hole. It is necessary to engage in the blocked state.
- the operation of the adjusting lever 24 causes the anchor portion 25 and the driven cam 29 to be pressed. It is necessary to ensure the surface pressure of the contact portion between the inner side surfaces of the support plate portions 15 and 15 and the outer side surfaces of the displacement bracket 16 in a state where the distance from the portion is reduced. And in order to ensure the surface pressure of these both contact parts, it is necessary to reduce the space
- the displacement bracket 16a when the displacement bracket 16a is provided on the upper side of the outer column 19a, the displacement bracket 16a is an upper end portion (base end portion) of the pair of support plate portions 15a and 15b constituting the support bracket 14a. It will be in the state of being near.
- the distance between the anchor portion 25 and the driven cam 29 of the cam device 26 (refer to FIG. 9 for the driven cam 29) is reduced based on the operation of the adjusting lever 24a, the both support plate portions 15a and 15b are displaced centering on each upper end part.
- both of the support plate portions 15a and 15b Since the rigidity of both of the support plate portions 15a and 15b is higher as they are closer to the upper end of each, the both abutment is performed with the steering wheel positioned at the upper end of the adjustment range in the structure shown in FIGS.
- the displacement bracket 16a and the upper end portions of the support plate portions 15a and 15 If the structure which can ensure this distance is employ
- the installation position of the steering column 6a is positioned on the lower side as long as the height position of the assembly portion of the support bracket 14a provided on the vehicle body side is the same. In many cases, it cannot be adopted unless there is room in the installation space.
- the force required to operate the adjusting lever cannot be finely adjusted, and the difference in the operating force of the adjusting lever due to the difference in the vertical position of the steering wheel cannot be solved sufficiently. Furthermore, in any structure, the contact area between the inner surface of the anchor portion and the driven cam and the outer surface of the both support plate portions is reduced, and the surface pressure of the contact portion is increased. These inner and outer surfaces are easily plastically deformed. When plastic deformation occurs, there is a possibility that the vertical position adjustment of the steering wheel cannot be performed smoothly.
- Japanese Unexamined Patent Publication No. 2009-227181 Japanese Unexamined Patent Publication No. 2010-254159 Japanese Unexamined Patent Publication No. 2011-112443 Japanese Unexamined Patent Publication No. 2005-001562
- the present invention does not cause a great difference in the force required to operate the adjustment lever regardless of the vertical position of the steering wheel, and is intended to realize a structure that can be manufactured at low cost. It is what.
- the tilt type steering apparatus is configured such that the sum of the thicknesses of a pair of left and right support plate parts sandwiching the displacement bracket from both sides in the width direction is fixed on the mounting plate side that is the base end side of both the support plate parts. By making it thinner than the side opposite to the mounting plate side, a large difference is not generated in the force required to operate the adjustment lever regardless of the vertical position of the steering wheel.
- the tilt type steering device of the present invention includes a steering column, a displacement bracket, a steering shaft, a support bracket, a pair of vertically elongated holes, a through hole, and a tilt saddle member, An anchor part, a tilt lever, and a pressing member are provided.
- the steering column is oscillated and displaced about a tilt shaft provided in the front in the width direction.
- the displacement bracket is fixed to an intermediate portion in the axial direction of the steering column.
- the steering shaft is rotatably supported on the inner diameter side of the steering column, and a steering wheel is fixed to a rear end portion protruding from the rear end opening of the steering column.
- the support bracket includes a mounting plate portion provided at one end portion in the vertical direction, and a pair of support plate portions provided in a state separated from the mounting plate portion in either the vertical direction or in the width direction. Have. Then, the mounting bracket is supported by the mounting plate in a state where the displacement bracket is sandwiched from both sides in the width direction by the both support plates. Further, the two vertical holes are provided in portions of the support plate portions that are aligned with each other, and are long in the vertical direction. Further, the through hole is formed in a part penetrating in the width direction in a portion of the displacement bracket that is aligned with the two vertical holes. Further, the tilting saddle member is inserted through both the vertically long holes and the through holes in the width direction. Further, the anchor portion is provided at one end of the tilting saddle member. Further, the tilt lever is provided at the other end of the tilting saddle member. Further, the pressing member expands and contracts the distance from the anchor portion based on the swing of the tilt lever.
- At least one of the support plate portions is an unequal thickness support plate portion having a partially different thickness.
- a part of the unequal thickness support plate portion includes a peripheral portion of the vertical slot formed in the unequal thickness support plate portion and faces the outer surface of the unequal thickness support plate portion.
- the thickness of the portion close to the mounting plate portion is also made smaller than the thickness of the portion far from the mounting plate portion.
- the mounting plate portion is provided at the upper end portion of the mounting bracket, the both support plate portions are provided in a state of being suspended downward from the mounting plate portion, and the displacement bracket is provided. May be provided above the steering column. And the thickness of an upper part among the surrounding parts of the said up-down direction long hole formed in the said unequal thickness support plate part may be made smaller than the thickness of a lower part similarly. Furthermore, when carrying out the above invention, the thickness of the lower portion may be the thickness of the material of the unequal thickness support plate portion, and the thickness of the upper portion may be smaller than the thickness of the material.
- the thickness of the peripheral portion of the up-and-down direction long hole in the unequal thickness support plate portion may be gradually decreased from the lower side to the upper side.
- the degree of change in the thickness of the peripheral portion of the up-and-down direction long hole in the unequal thickness support plate portion is constant over the entire length in the up-down direction, or the unequal thickness support plate portion
- the degree of change in the thickness of the peripheral portion of the vertical hole may be changed in the vertical direction.
- the tilt type steering device of the present invention includes a steering column that swings and displaces about a tilt shaft provided in the width direction, a displacement bracket that is fixed to an intermediate portion in the axial direction of the steering column, and the steering column.
- a steering shaft that is rotatably supported on the inner diameter side of the steering column and that fixes a steering wheel to the rear end portion of the steering column, and a first support plate that extends in any direction from the mounting plate portion provided on the vehicle body
- a second support plate portion extending in a vertical direction from the mounting plate portion and spaced apart from the first support plate portion in the width direction
- the first and second supports A support bracket supported by the mounting plate portion with respect to the vehicle body in a state in which the displacement bracket is sandwiched from both sides in the width direction by the plate portion, and provided on the first support plate portion
- a first vertically elongated slot that is long in the vertical direction
- a second vertically elongated slot provided in a portion aligned with the first vertically elongated slot of the second support plate portion
- a pressing member that expands and contracts the gap between the first plate and the second plate, and the distance between the first plate and the second plate is smaller in the portion closer to the mounting plate than in the portion far from the mounting plate. It is good also as a structure characterized by these.
- the mounting plate portion is provided at an upper end portion of the support bracket, the first support plate portion and the second support plate portion are provided in a state of hanging downward from the mounting plate portion, and the displacement bracket is It is good also as a structure which is provided in the upper side of a steering column and the thickness of the upper part of at least one of the said 1st location and the said 2nd location is made smaller than the thickness of a lower part.
- the thickness of the lower part may be the same as the thickness of the material of at least one of the first support plate portion and the second support plate portion.
- the thickness change from the lower part to the upper part may be constant over the entire length in the vertical direction. Further, the thickness from the lower part to the upper part may be changed in the middle of the vertical direction.
- at least one of the first location and the second location may be formed by pressing. Further, the first location is integrally formed of the same material as the first support plate portion, and the second location is integrally formed of the same material as the second support plate portion. Also good.
- the present invention as described above, it is possible to realize a tilt type steering device that does not cause a large difference in the force required to operate the adjustment lever regardless of the vertical position of the steering wheel. That is, among the pair of support plate portions that sandwich the displacement bracket fixed to the steering column, the sum of the thicknesses of the portions sandwiched between the anchor portion and the pressing member is high in rigidity of both the support plate portions. It is smaller on the side of the mounting plate part than on the side of the anti-mounting plate part having low rigidity. Then, the reaction force associated with reducing the distance between the anchor portion and the pressing member by rotating the adjustment lever tends to be smaller on the side of the mounting plate portion as the sum of the thicknesses is smaller. Become.
- reaction force tends to be larger on the side where the rigidity of the both support plate portions is higher than on the lower side, these tendencies cancel each other, and the reaction force can be made substantially constant.
- the operating force required to rotate the adjustment lever is almost proportional to the reaction force.
- the magnitude of the reaction force is greatly changed by slightly changing the sum of the thicknesses. Accordingly, with respect to the unequal thickness support plate portion, the amount of change in thickness along the up-and-down direction long hole is small, and at the same time that the unequal thickness support plate portion is subjected to pressing such as bending and punching.
- the thickness of the peripheral portion of the vertical hole can be easily changed to a desired value.
- the assembling direction is not limited for either the anchor portion or the pressing member. Therefore, the manufacturing cost does not increase.
- the force required to operate the adjusting lever can be finely adjusted by changing the degree to which the thickness of the surrounding portion changes, the difference in operating force of the adjusting lever due to the difference in the vertical position of the steering wheel Can be solved sufficiently.
- both the anchor portion and the inner surface of the pressing member are in contact with the outer surfaces of the both support plate portions with a sufficient area regardless of the vertical position of the steering wheel. Therefore, the area of the abutting portion between the inner side surface of the pressing member of the anchor portion and the outer side surface of the both support plate portions does not become excessive, and plastic deformation of each of the inner side surface and the outer side surface is suppressed, and the steering is suppressed. Smoothness of adjusting the vertical position of the wheel can be secured.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 with a part omitted or simplified.
- the partial cutting schematic side view which shows an example of the steering device for motor vehicles incorporating the tilt type steering device.
- the structure of this example includes a telescopic mechanism for adjusting the front-rear position in addition to a tilt mechanism for adjusting the vertical position of the steering wheel 1 (see FIG. 7).
- a steering column 6a is used in which the rear portion of the inner column 20a is fitted into the front portion of the outer column 19a so that the entire length can be expanded and contracted.
- a displacement bracket 16a is fixed on the upper front side of the outer column 19a, and a long through hole 18 is formed in the displacement bracket 16a in the axial direction of the outer column 19a.
- a slit 21 extending in the axial direction of the outer column 19a is formed in the central portion in the width direction of the upper surface of the front portion of the displacement bracket 16a, and the force for clamping the displacement bracket 16a from both the left and right sides is changed.
- the inner diameter of the front part of the outer column 19a can be enlarged or reduced.
- the support bracket 14a constituting the structure of this example hangs in a state in which the pair of support plate portions 15a and 15b are separated from each other in the width direction from the lower surface of the mounting plate portion 33 provided at the upper end portion. And in the part which these support plate parts 15a and 15b mutually match, the partial circular arc-shaped long holes 17a and 17b centering on the tilt axis 13a are formed, respectively.
- the mounting plate 33 supports the vehicle body so as to be separated forward by an impact load applied during a secondary collision.
- the above configuration is the same as that of a general tilt type steering apparatus.
- One of the support plate portions 15a (left side in FIG. 2) provided is an unequal thickness support plate portion having a partially different thickness.
- the thickness of the peripheral portion 34 (refer to FIGS. 3 to 4 for details) of the vertical plate 17a formed in the support plate 15a at a part of the support plate 15a is set to the thickness of the vertical plate 17a. And continuously changing in the direction of decreasing as it goes from below to above.
- the range of the peripheral portion 34 in which the thickness is changed in this way is the entire portion that may come into contact with the inner surface of the anchor portion 25.
- the thickness is changed between the upper end portion and the lower end portion of the peripheral portion 34.
- the support plate portion 15a is made of a cold-rolled steel plate having a thickness of about 3.2 mm (SPCC of JIS G 3141)
- the difference between the thickness of the upper end portion of the peripheral portion 34 and the thickness of the lower end portion is determined. What is necessary is just to be about 0.2 mm. That is, the thickness of the upper end of the peripheral portion 34 is set to 3.0 mm, the thickness of the lower end is set to 3.2 mm which is the same as the thickness of the material, and the thickness of the intermediate portion is set to 3.0 mm and 3.2 mm. It is appropriate to change it continuously in the vertical direction.
- the state in which the thickness of the peripheral portion 34 changes in the vertical direction may be constant over the entire length in the vertical direction as shown in FIG. 4, but changes in the middle in the vertical direction as shown in FIG. You can also make it.
- the change portion is not provided with a portion such as a step that prevents the anchor portion 25 from sliding.
- the thickness of the other support plate portion 15b (to the right in FIG. 2) of the support plate portions 15a and 15b is the same as the total length of the vertical slot 17b.
- the twist is constant (for example, the thickness of the material is 3.2 mm).
- the thickness of the other support plate portion 15b can be varied in the vertical direction.
- the reinforcing plate 35 is provided at a location corresponding to the straight portion. It is good also as a structure.
- the base point of the reinforcing plate corresponds to a contact point between the linear portion and the inclined portion.
- the tilt type steering apparatus of the present example configured as described above, it is possible to prevent a large difference from occurring in the force required to operate the adjustment lever 24a regardless of the vertical position of the steering wheel 1.
- the adjusting lever 24a is rotated downward to reduce the axial dimension of the cam device 26, and a driven cam 29 (driven cam) constituting the cam device 26 is reduced. 29, the interval between the inner surface of FIG. 9) and the inner surface of the anchor portion 25 is increased.
- the adjusting lever 24a is rotated upward to measure the axial dimension of the cam device 26.
- the driven cam 29 and the anchor portion 25 sandwich the displacement bracket 16a fixed on the upper front end portion of the outer column 19a via the support plate portions 15a and 15b. Then, the inner side surfaces of the support plate portions 15a and 15b and the outer side surfaces of the displacement bracket 16a are rubbed strongly to hold the vertical position of the steering wheel 1 at the adjusted position. At the same time, the inner diameter of the front portion of the aura column 19a is reduced, and the front inner peripheral surface and the rear outer peripheral surface of the inner column 20a are strongly rubbed so that the front and rear positions of the steering wheel 1 are adjusted to the adjusted positions. Hold.
- the force required to rotate the adjustment lever 24a upward is the sum of the thicknesses of the members existing between the inner surface of the driven cam 29 and the inner surface of the anchor portion 25.
- the greater the thickness the smaller the thickness.
- the thickness of the peripheral portion 34 of the one support plate portion 15a is smaller as described above in the portion to be the sandwiched portion thickness.
- the part thickness is small at the top and large at the bottom. Therefore, the operating force required to rotate the adjusting lever 24a upward based on the sandwiched portion thickness is small when the steering wheel 1 is in the upper position, and when the steering wheel 1 is also in the lower position. Becomes bigger.
- the rigidity of the support plate portions 15a and 15b is high at the top and low at the bottom. Accordingly, the operating force required to rotate the adjusting lever 24a upward based on the rigidity of both the support plate portions 15a and 15b is large when the steering wheel 1 is in the upper position, and is also in the lower position. If it is, it becomes smaller. In this manner, the operating force changes based on the direction in which the operating force of the adjusting lever 24a changes based on the difference in the sandwiched portion thickness and the difference in rigidity between the sandwiched plate portions 15a, 15b. The directions are opposite to each other.
- the operation force can be made almost constant regardless of the height position of the steering wheel 1, and the uncomfortable feeling given to the driver operating the adjusting lever 24a is alleviated or eliminated. it can.
- the operating force of the adjusting lever 24a can be arbitrarily and finely adjusted by changing the degree to which the thickness of the peripheral portion 34 changes. For this reason, the difference in the operating force of the adjusting lever 24a due to the difference in the vertical position of the steering wheel 1 can be sufficiently eliminated.
- the holding force for holding the steering wheel 1 at the adjusted position becomes smaller at the upper side and larger at the lower side.
- the difference in operating force of the adjusting lever 24a based on the difference in rigidity between the upper and lower portions of the sandwiched plate portions 15a and 15b is extremely large even if the driver feels uncomfortable if left unattended. It is not a thing.
- the operation force of the adjusting lever 24a is greatly changed by slightly changing the thickness of the sandwiched portion.
- the difference in the operation force due to the difference in rigidity can be substantially eliminated by merely changing the thickness between the upper end portion and the lower end portion of the peripheral portion 34 by about 0.2 mm. Therefore, even when the steering wheel 1 is moved to the adjustable upper end position, the steering wheel 1 can be held at the adjusted position with a sufficient holding force by rotating the adjustment lever 24a upward. . Even if the steering wheel 1 tends to shift downward, the peripheral portion 34 is thicker downward, so that the steering wheel 1 does not shift downward as much as a problem.
- the processing for changing the thickness of the peripheral portion 34 is bent on the support plate portion 15a, and the vertically elongated hole 17a is formed. It can be performed simultaneously with press working such as punching to form.
- the assembling direction is not limited for either the anchor portion 25 or the driven cam 29. Therefore, the manufacturing cost and assembly cost are not increased.
- the inner surfaces of the anchor portion 25 and the driven cam 29 are in contact with the outer surfaces of the support plate portions 15a and 15b with a sufficient area regardless of the vertical position of the steering wheel 1. . Accordingly, the area of the contact portion between the inner surface of the anchor portion 25 and the driven cam 29 and the outer surfaces of the support plate portions 15a and 15b does not become excessive. The smoothness of adjusting the vertical position of the steering wheel 1 can be ensured by suppressing plastic deformation.
- the effect of the present invention is remarkably obtained by the structure in which the displacement bracket is provided on the upper side of the steering column.
- the effect obtained by applying the present invention can be obtained to some extent. That is, the present invention can be applied to a structure in which the displacement bracket is provided below the steering column.
- a structure in which a tunnel-shaped recess recessed upward is formed in a part of the vehicle body (dashboard portion), and a support bracket is provided at the lower end opening of the recess.
- a mounting plate portion is provided at the lower end portion of the support bracket, and a pair of left and right support plate portions project upward from the upper surface of the mounting plate portion.
- the structure for reducing the distance between the anchor portion and the pressing member based on the operation of the adjusting lever in order to hold the steering wheel at the adjusted position is not limited to the cam device as shown in the figure, and has been widely used in the past.
- the implemented screw structure may be used.
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Abstract
Description
このうちのステアリングコラムは、前部に幅方向に設けられたチルト軸を中心として揺動変位する。
更に、前記変位ブラケットは、前記ステアリングコラムの軸方向中間部に固設されている。
更に、前記ステアリングシャフトは、前記ステアリングコラムの内径側に回転自在に支持され、このステアリングコラムの後端開口から突出した後端部分にステアリングホイールを固定する。
更に、前記支持ブラケットは、上下方向一端部に設けられた取付板部、及び、この取付板部から上下何れかの方向に、幅方向に離隔した状態で設けられた1対の支持板部を有する。そして、これら両支持板部により前記変位ブラケットを幅方向両側から挟む状態で、前記取付板部により車体に対し支持される。
更に、前記両上下方向長孔は、前記両支持板部の互いに整合する部分に設けられ、上下方向に長い。
更に、前記通孔は、前記変位ブラケットの一部で前記両上下方向長孔に整合する部分に、幅方向に貫通する状態で形成されている。
更に、前記チルト用杆状部材は、前記両上下方向長孔及び通孔を幅方向に挿通している。
更に、前記アンカ部は、このチルト用杆状部材の一端部に設けられている。
更に、前記チルトレバーは、このチルト用杆状部材の他端部に設けられている。
更に、前記押圧部材は、前記チルトレバーの揺動に基づいて前記アンカ部との間隔を拡縮する。
更に、上記発明を実施する場合、前記下方部分の厚さを、前記不等厚支持板部の素材の厚さとし、前記上方部分の厚さを、この素材の厚さよりも小さくしてもよい。
更に、前記不等厚支持板部のうちで前記上下方向長孔の周囲部分の厚さを、下方から上方に向かう程漸次小さくしてもよい。
更に、前記不等厚支持板部のうちで前記上下方向長孔の周囲部分の厚さが変化する程度を、上下方向の全長に亙り一定とするか、或いは前記不等厚支持板部のうちで前記上下方向長孔の周囲部分の厚さが変化する程度を、上下方向の途中で変化させてもよい。
更に、本発明のチルト式ステアリング装置は、幅方向に設けられたチルト軸を中心として揺動変位するステアリングコラムと、前記ステアリングコラムの軸方向中間部に固設された変位ブラケットと、前記ステアリングコラムの内径側に回転自在に支持され、前記ステアリングコラムの後端部分にステアリングホイールを固定するステアリングシャフトと、車体に設けられた取付板部から上下何れかの方向に延出する第1の支持板部と、前記取付板部から上下何れかの方向に延出し、前記第1支持板部から幅方向に離間した状態で設けられた第2の支持板部と、前記第1及び第2の支持板部により前記変位ブラケットを幅方向両側から挟む状態で、前記取付板部により前記車体に対し支持される支持ブラケットと、前記第1の支持板部に設けられた、上下方向に長い第1の上下方向長孔と、前記第2の支持板部の前記第1の上下方向長孔に整合する部分に設けられた第2の上下方向長孔と、前記変位ブラケットの前記第1及び第2の上下方向長孔に整合する部分を貫通する通孔と、前記通孔に挿通されたチルト用杆状部材と、前記チルト用杆状部材に設けられ、前記第1の支持板部の外側面の第1の箇所に対向するアンカ部と、前記第2の支持板部の外側面の第2の箇所に対向し、チルトレバーの揺動に基づいて前記アンカ部との間隔を拡縮する押圧部材とを備え、前記第1の箇所と前記第2の箇所との間隔は、前記取付板部から遠い部分よりも前記取付板部から近い部分の方が小さいことを特徴とする構成としてもよい。
更に、前記取付板部を前記支持ブラケットの上端部に設け、前記第1の支持板部と第2の支持板部を前記取付板部から下方に垂下された状態で設け、前記変位ブラケットを前記ステアリングコラムの上側に設け、前記第1の箇所と前記第2の箇所のうちの少なくとも一方の上方部分の厚さを、下方部分の厚さよりも小さくする構成としてもよい。
更に、前記下方部分の厚さが、前記第1の支持板部及び前記第2の支持板部の少なくとも一方の素材の厚さと同一である構成としてもよい。
更に、前記下方部分から前記上方部分への厚さの変化が、上下方向の全長に亙り一定である構成としてもよい。
更に、前記下方部分から前記上方部分への厚さが、上下方向の途中で変化する構成としてもよい。
更に、前記第1の箇所と前記第2の箇所の少なくとも一方は、プレス加工により形成される構成としてもよい。
更に、前記第1の箇所は前記第1の支持板部と同一素材で一体的に形成され、前記第2の箇所は前記第2の支持板部と同一素材で一体的に形成される構成としてもよい。
即ち、ステアリングコラムに固設した変位ブラケットを挟持する1対の支持板部のうちで、アンカ部と押圧部材とにより挟持される部分の厚さの和が、これら両支持板部の剛性が高い取付板部の側で、剛性が低い反取付板部の側よりも小さい。そして、前記調節レバーを回動させて前記アンカ部と前記押圧部材との間隔を縮める事に伴う反力が、前記厚さの和が小さい分だけ、前記取付板部の側で小さくなる傾向になる。又、この反力は、前記両支持板部の剛性が高い側で低い側よりも大きくなる傾向になるので、これら両傾向が互いに相殺し合って、前記反力をほぼ一定にできる。前記調節レバーを回動させる為に要する操作力は、ほぼこの反力に比例するので、この反力をほぼ一定にする事により、この操作力をほぼ一定にできて、この調節レバーを操作する運転者に与える違和感を緩和乃至は解消できる。
なお、図6に示すように、前記支持板部15aの厚さが小さい箇所に補強板35を設けてもよい。例えば、図5の様に、直線部と傾斜部を設けて前記周囲部分34の厚さを上下方向の途中で変化させた場合には、前記直線部に対応する箇所に前記補強板35を設ける構成としてもよい。この場合、補強板の基点は、前記直線部と前記傾斜部の接点に相当する。
前記ステアリングホイール1の位置調節を行う際には、前記調節レバー24aを下方に回動させて、カム装置26の軸方向寸法を縮め、このカム装置26を構成する被駆動カム29(被駆動カム29に関しては、図9参照)の内側面と前記アンカ部25の内側面との間隔を拡げる。この状態で、前記ステアリングホイール1の位置を調節した後、このステアリングホイール1を調節後の位置に保持する際には、前記調節レバー24aを上方に回動させて、カム装置26の軸方向寸法を拡げ、前記被駆動カム29の内側面と前記アンカ部25の内側面との間隔を縮める。この状態で、これら被駆動カム29と前記アンカ部25とは、前記両支持板部15a、15bを介して、前記アウタコラム19aの前端部上側に固設した変位ブラケット16aを挟持する。そして、前記両支持板部15a、15bの内側面とこの変位ブラケット16aの両外側面とを強く摩擦させて、前記ステアリングホイール1の上下位置を、調節後の位置に保持する。同時に、前記アウラコラム19aの前部の内径を縮め、この前部内周面と前記インナコラム20aの後部外周面とを強く摩擦させて、前記ステアリングホイール1の前後位置を、それぞれ調節後の位置に保持する。
この様に、前記被挟持部厚さの相違に基づいて前記調節レバー24aの操作力が変化する方向と、前記両被挟持板部15a、15bの剛性の相違に基づいてこの操作力が変化する方向とは互いに逆になる。従って、これら両方向の変化が互いに相殺し合い、前記ステアリングホイール1の高さ位置に拘らず、前記操作力をほぼ一定にできて、前記調節レバー24aを操作する運転者に与える違和感を緩和乃至は解消できる。又、この調節レバー24aの操作力は、前記周囲部分34の厚さが変化する程度を変える事により、任意に、且つ、微調節できる。この為、前記ステアリングホイール1の上下位置の相違に伴う前記調節レバー24aの操作力の差を十分に解消できる。
更に、ステアリングホイールを調節後の位置に保持すべく、調節レバーの操作に基づいてアンカ部と押圧部材との間隔を縮める為の構造に関しても、図示の様なカム装置に限らず、従来から広く実施されているねじ構造でも良い。
本出願は、2013年1月15日出願の日本特許出願(特願2013-004187)に基づくものであり、その内容はここに参照として取り込まれる。
2 ステアリングギヤユニット
3 入力軸
4 タイロッド
5 ステアリングシャフト
6、6a ステアリングコラム
7 自在継手
8 中間シャフト
9 自在継手
10 電動モータ
11 ハウジング
12 車体
13、13a チルト軸
14、14a 支持ブラケット
15、15a、15b 支持板部
16、16a 変位ブラケット
17、17a、17b 上下方向長孔
18 通孔
19、19a アウタコラム
20、20a インナコラム
21 スリット
22 被挟持板部
23 チルト用杆状部材
24、24a 調節レバー
25 アンカ部
26 カム装置
27 第一の係合凸部
28 駆動カム
29 被駆動カム
30 第二の係合凸部
31 ナット
32 スラストベアリング
33 取付板部
34 周囲部分
35 補強板
Claims (7)
- 幅方向に設けられたチルト軸を中心として揺動変位するステアリングコラムと、
前記ステアリングコラムの軸方向中間部に固設された変位ブラケットと、
前記ステアリングコラムの内径側に回転自在に支持され、前記ステアリングコラムの後端部分にステアリングホイールを固定するステアリングシャフトと、
車体に設けられた取付板部から上下何れかの方向に延出する第1の支持板部と、
前記取付板部から上下何れかの方向に延出し、前記第1の支持板部から幅方向に離間した状態で設けられた第2の支持板部と、
前記第1及び第2の支持板部により前記変位ブラケットを幅方向両側から挟む状態で、前記取付板部により前記車体に対し支持される支持ブラケットと、
前記第1の支持板部に設けられた、上下方向に長い第1の上下方向長孔と、前記第2の支持板部の前記第1の上下方向長孔に整合する部分に設けられた第2の上下方向長孔と、
前記変位ブラケットの前記第1及び第2の上下方向長孔に整合する部分を貫通する通孔と、
前記通孔に挿通されたチルト用杆状部材と、
前記チルト用杆状部材に設けられ、前記第1の支持板部の外側面の第1の箇所に対向するアンカ部と、
前記第2の支持板部の外側面の第2の箇所に対向し、チルトレバーの揺動に基づいて前記アンカ部との間隔を拡縮する押圧部材とを備え、
前記第1の箇所と前記第2の箇所との間隔は、前記取付板部から遠い部分よりも前記取付板部から近い部分の方が小さいことを特徴とするチルト式ステアリング装置。 - 前記取付板部を前記支持ブラケットの上端部に設け、
前記第1の支持板部と第2の支持板部を前記取付板部から下方に垂下された状態で設け、
前記変位ブラケットを前記ステアリングコラムの上側に設け、
前記第1の箇所と前記第2の箇所のうちの少なくとも一方の上方部分の厚さを、下方部分の厚さよりも小さくすることを特徴とする請求項1に記載のチルト式ステアリング装置。 - 前記下方部分の厚さが、前記第1の支持板部及び前記第2の支持板部の少なくとも一方の素材の厚さと同一であることを特徴とする請求項2に記載のチルト式ステアリング装置。
- 前記下方部分から前記上方部分への厚さの変化が、上下方向の全長に亙り一定であることを特徴とする請求項2に記載のチルト式ステアリング装置。
- 前記下方部分から前記上方部分への厚さが、上下方向の途中で変化することを特徴とする請求項2に記載のチルト式ステアリング装置。
- 前記第1の箇所と前記第2の箇所の少なくとも一方は、プレス加工により形成されることを特徴とする請求項2に記載のチルト式ステアリング装置。
- 前記第1の箇所は前記第1の支持板部と同一素材で一体的に形成され、前記第2の箇所は前記第2の支持板部と同一素材で一体的に形成されることを特徴とする請求項6に記載のチルト式ステアリング装置。
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Also Published As
Publication number | Publication date |
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JPWO2014112196A1 (ja) | 2017-01-19 |
EP2899096A1 (en) | 2015-07-29 |
EP2899096B1 (en) | 2017-07-26 |
EP2899096A4 (en) | 2015-12-02 |
US20150251682A1 (en) | 2015-09-10 |
CN104379430B (zh) | 2017-06-09 |
CN104379430A (zh) | 2015-02-25 |
JP5962777B2 (ja) | 2016-08-03 |
US9283983B2 (en) | 2016-03-15 |
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