CN213619937U - Steering device - Google Patents

Abstract

The utility model provides a can restrain device that turns to of falling of steering wheel. The steering device is provided with: a top plate having a 1 st fixing portion and a 2 nd fixing portion fixed to the bogie beam, and a connecting portion connecting the 1 st fixing portion and the 2 nd fixing portion; a 1 st bracket mounted on the 1 st fixing part; a 2 nd bracket mounted on the 2 nd fixing part; an upper column supported by the No. 1 bracket; and a lower column fixed to the No. 2 bracket. The connecting portion has a 1 st hole as a long hole. The 1 st bracket has a guide pin extending through the 1 st hole. The 2 nd fixing part has: an upper wall facing the steering support beam; two sidewalls connected to the No. 2 bracket; a rear wall connected with the coupling portion; and an inclined wall disposed at a corner surrounded by the upper wall, the side wall, and the rear wall. The upper wall has a recess disposed between two of the inclined walls.

Description

Steering device

Technical Field

The utility model relates to a turn to device.

Background

A vehicle is provided with a steering device as a device for transmitting an operation of a steering wheel by an operator (driver) to wheels. Sometimes, the steering device has an adjustment mechanism for adjusting the position of the steering wheel. For example, patent document 1 describes an example of a steering device capable of adjusting the vertical position of a steering wheel. As described in patent document 1, a steering column is attached to a vehicle body via an axle. The vertical position of the steering wheel is changed by rotating the steering column about the shaft as a pivot. In the steering device described in patent document 1, a member (front portion) on which a shaft serving as a pivot is disposed is integrated with an adjustment support body that fastens a steering column at the rear and a member (rear portion) that supports the adjustment support body. This improves the rigidity of the adjustment support.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2011-235886

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

In addition, when a vehicle collides, a secondary collision occurs in which the operator collides with the steering wheel. Therefore, the steering device has an energy absorbing device for reducing the impact applied to the operator at the time of a secondary collision. However, in the case of the steering device described in patent document 1, when energy that is not completely absorbed by the energy absorbing device is input to the steering device, a member (front portion) on which a shaft serving as a pivot is disposed is deformed. In this case, the steering wheel may fall together with the steering column, and the operation of the steering wheel may not be performed.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a steering device capable of suppressing the fall of a steering wheel.

Means for solving the problems

In order to achieve the above object, the utility model discloses a technical scheme's device that turns to has roof, the 1 st support, the 2 nd support, goes up post and lower post, and this roof has: a first fixing part 1 fixed to a steering support beam provided in a vehicle; a 2 nd fixing portion that is disposed forward of the 1 st fixing portion and is fixed to the bogie support beam; and a coupling portion that couples the 1 st fixing portion and the 2 nd fixing portion, wherein the 1 st bracket is detachably attached to the 1 st fixing portion, the 2 nd bracket is rotatably attached to the 2 nd fixing portion with respect to the 2 nd fixing portion, the upper column is supported by the 1 st bracket and supports a steering shaft coupled to a steering wheel, the lower column is fixed to the 2 nd bracket and coupled to the upper column, the coupling portion has a 1 st hole that is a long hole extending in an axial direction of the upper column, the 1 st bracket has a guide pin that penetrates the 1 st hole, and the 2 nd fixing portion has: an upper wall facing the bogie support beam; two sidewalls connected to the 2 nd bracket; a rear wall connected to the coupling portion; and an inclined wall that is disposed at a corner surrounded by the upper wall, the side wall, and the rear wall and is inclined with respect to all of the upper wall, the side wall, and the rear wall, wherein the upper wall has a recess that is disposed between the two inclined walls and is provided on a surface facing the bogie support beam.

When a vehicle collides, a secondary collision occurs in which the operator collides with the steering wheel. When a load exceeding a predetermined load is applied to the steering wheel, the 1 st bracket is disengaged from the 1 st fixing portion. Thereafter, the guide pin is guided by the 1 st hole, so that the 1 st bracket moves in the axial direction of the upper column. The upper column 51 moves together with the 1 st carriage. The impact is absorbed by the friction between the upper and lower columns. However, in the case where energy exceeding the energy that can be absorbed by friction between the upper column and the lower column acts on the steering device, the load acting on the 1 st bracket is transmitted to the 2 nd fixing portion via the guide pin. The utility model discloses an among the device that turns to, 2 nd fixed part has upper wall, lateral wall, back wall and tilt wall, and the upper wall has the concave part. Therefore, the rigidity of the 2 nd fixing portion becomes high. Even when a large load is applied to the 2 nd fixing portion, the 2 nd fixing portion is not easily deformed. Therefore, the utility model discloses a turn to device can restrain the dropping of steering wheel.

As a preferable aspect of the steering device, the 2 nd fixing portion includes a rib protruding from the rear wall and connected to the connection portion. Thus, the rib supports between the rear wall and the coupling portion, and therefore, the 2 nd fixing portion is less likely to bend relative to the coupling portion. The utility model discloses a turn to the device and can further restrain the deformation of 2 nd fixed part under the condition that has acted on the load to 2 nd fixed part.

As a preferable mode of the steering device, the connecting portion has a 2 nd hole into which a part of the steering support beam is inserted. Thus, the steering device of the present invention can suppress the mutual interference between the steering support beam and the roof even when the steering support beam is disposed relatively close to the roof.

As a preferable aspect of the steering device, the 1 st hole is disposed on both sides of the 2 nd hole. Thereby, the two guide pins are guided by the 1 st holes, respectively. The 1 st bracket moves more straightly in the axial direction of the upper column. Therefore, the energy that can be actually absorbed by the friction between the upper column and the lower column does not easily deviate from the design value. The utility model discloses a turn to device can utilize the friction between upper prop and the lower prop to absorb the energy of regulation, and can restrain the deformation of 2 nd fixed part.

Effect of the utility model

The utility model discloses a turn to device and can restrain falling of steering wheel.

Drawings

Fig. 1 is a perspective view of a steering device according to the present embodiment.

Fig. 2 is a perspective view of the steering device of the present embodiment.

Fig. 3 is a perspective view of the steering device of the present embodiment.

Fig. 4 is a plan view of the steering device of the present embodiment.

Fig. 5 is a sectional view a-a in fig. 4.

Fig. 6 is a sectional view B-B in fig. 4.

Fig. 7 is a cross-sectional view taken along line C-C of fig. 5.

Fig. 8 is a perspective view of the bogie support beam, the roof panel and the 1 st bracket.

Fig. 9 is a perspective view of the bogie support beam, the roof panel and the 1 st bracket.

FIG. 10 is a side view of the bogie support beam, roof panel and bracket 1.

Fig. 11 is an exploded perspective view of the bogie support beam, the roof panel, and the 1 st bracket.

Fig. 12 is an exploded perspective view of the bogie support beam, the roof panel, and the 1 st bracket.

Fig. 13 is a perspective view of the 2 nd fixing portion of the top plate.

Fig. 14 is a perspective view of the 2 nd fixing portion of the top plate.

Fig. 15 is a perspective view of the 2 nd fixing portion of the top plate.

Fig. 16 is a plan view of the 2 nd fixing portion of the top plate.

Fig. 17 is a bottom view of the 2 nd fixing portion of the top plate.

Fig. 18 is a cross-sectional view taken along line D-D of fig. 16.

Description of the reference numerals

10. A top plate; 11. 1 st fixed part; 12. a 2 nd fixing part; 15. a connecting portion; 20. a steering shaft; 21. an input shaft; 22. an output shaft; 30. a fastening mechanism; 31. a fixed cam; 32. a movable cam; 33. a thrust bearing; 34. a nut; 35. a fastening rod; 36. a friction plate; 37. a housing; 38. a coil spring; 39. an operating lever; 40. a 1 st bracket; 41. mounting a plate; 44. 1 st support plate; 45. a 2 nd support plate; 47. a guide pin; 48. a resin member; 49. detached capsules (Japanese: detachable カプセル); 50. a steering column; 51. putting the column on; 54. column descending; 80. a 2 nd bracket; 81. a pivot; 100. a steering device; 101. a steering wheel; 103. a universal joint; 105. an intermediate shaft; 107. a universal joint; 109. a pinion shaft; 121. an upper wall; 123. a side wall; 125. a rear wall; 127. an inclined wall; 129. a rib portion; 151. a 2 nd well; 153. 1, hole; 200. a steering support beam; 350. a rod portion; 351. a head portion; 352. an external thread; 441. 451, a long hole; 511. a main body portion; 513. a slit; 514. 515, a protrusion; 5141. 5151, long holes; 1211. a slit; 1212. a recess; 1231. an aperture; z, axis of rotation.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. The present invention is not limited to the following embodiments (hereinafter, referred to as "embodiments") for carrying out the present invention. The components of the following embodiments include those that can be easily conceived by those skilled in the art and those that are substantially the same, i.e., those within the equivalent range. Further, the components disclosed in the following embodiments can be appropriately combined.

Fig. 1 is a perspective view of a steering device according to the present embodiment. Fig. 2 is a perspective view of the steering device of the present embodiment. Fig. 3 is a perspective view of the steering device of the present embodiment. Fig. 4 is a plan view of the steering device of the present embodiment. Fig. 5 is a sectional view a-a in fig. 4. Fig. 6 is a sectional view B-B in fig. 4. Fig. 7 is a cross-sectional view taken along line C-C of fig. 5. Fig. 8 and 9 are perspective views of the bogie support beam, the roof panel, and the 1 st bracket. FIG. 10 is a side view of the bogie support beam, roof panel and bracket 1. Fig. 11 and 12 are exploded perspective views of the bogie support beam, the roof panel, and the 1 st bracket. Fig. 13 to 15 are perspective views of the 2 nd fixing portion of the top plate. Fig. 16 is a plan view of the 2 nd fixing portion of the top plate. Fig. 17 is a bottom view of the 2 nd fixing portion of the top plate. Fig. 18 is a cross-sectional view taken along line D-D of fig. 16.

Detailed description of the preferred embodiments

As shown in fig. 1, the steering device 100 has a steering wheel 101, a steering shaft 20, a universal joint 103, an intermediate shaft 105, and a universal joint 107. The steering device 100 is engaged with the pinion shaft 109.

As shown in fig. 1, the steering shaft 20 has an input shaft 21 and an output shaft 22. The input shaft 21 and the output shaft 22 are supported by the steering column 50. One end of the input shaft 21 is connected to the steering wheel 101. The other end of the input shaft 21 is connected to the output shaft 22. The input shaft 21 is coupled to the output shaft 22 so as to be movable in the axial direction relative to the output shaft 22 while transmitting torque to the output shaft 22. The output shaft 22 is connected to the universal joint 103. One end of the intermediate shaft 105 is connected to the universal joint 103. The other end of the intermediate shaft 105 is connected to a universal joint 107. The universal joint 107 is coupled to a pinion shaft 109.

The XYZ rectangular coordinate system is used in the following description. The X axis is parallel to the vehicle width direction of the vehicle on which the steering device 100 is mounted. The Z-axis is parallel to the longitudinal direction of the steering shaft 20 (parallel to the rotation axis Z). The Y axis is perpendicular to both the X and Z axes. A direction along the X axis is described as an X direction, a direction along the Y axis is described as a Y direction, and a direction along the Z axis is described as a Z direction. The direction toward the front of the vehicle in the Z direction is taken as the + Z direction. The right direction when the operator faces the + Z direction is regarded as the + X direction. The upward direction in the Y direction is regarded as the + Y direction.

As shown in fig. 2, the steering device 100 has a steering column 50, a roof panel 10, a 1 st bracket 40, a 2 nd bracket 80, and a fastening mechanism 30.

The steering column 50 is a member that supports the steering shaft 20. The input shaft 21 and the output shaft 22 of the steering shaft 20 are rotatable about the rotation axis Z. The rotation axis Z is a straight line passing through the center of gravity of each cross section when the input shaft 21 is cut by a plane orthogonal to the longitudinal direction of the input shaft 21.

The steering column 50 has an upper column 51 and a lower column 54. The upper column 51 is a substantially cylindrical member. The upper column 51 is disposed rearward of the lower column 54. The upper column 51 supports the input shaft 21 via a bearing. The lower column 54 is a substantially cylindrical member. A part of the lower column 54 is fitted inside the upper column 51. A part of the lower column 54 is in contact with the inner wall of the upper column 51. Friction is generated between the upper column 51 and the lower column 54. In a normal use state, the relative movement of the upper column 51 and the lower column 54 is restricted by friction between the upper column 51 and the lower column 54. On the other hand, when a large load is applied to the upper column 51 (at the time of a secondary collision or the like), the upper column 51 and the lower column 54 move relative to each other while overcoming friction.

As shown in fig. 7, the upper column 51 has a main body portion 511, a slit 513, a projection 514, and a projection 515. The body portion 511 is a cylindrical member that covers the steering shaft 20. The slit 513 is a partial cut provided in the body 511. The slit 513 extends along the Z direction. The end of the slit 513 in the-Z direction is open. The protruding portion 514 and the protruding portion 515 extend from the main body 511 in the-Z direction. The protrusion 514 is disposed on the + X direction side with respect to the slit 513. The protruding portion 514 has an elongated hole 5141 extending in the Z direction. The projection 515 is disposed on the-X direction side with respect to the slit 513. The protruding portion 515 has an elongated hole 5151 extending in the Z direction.

The top plate 10 is a member for supporting the steering column 50. As shown in fig. 1, the top plate 10 is disposed on the + Y direction side of the steering column 50. The roof panel 10 is fixed to a bogie support beam 200 (see fig. 8 to 10) provided in the vehicle. As shown in fig. 8, the top plate 10 includes a 1 st fixing portion 11, a 2 nd fixing portion 12, and a coupling portion 15. The 1 st fixing part 11, the 2 nd fixing part 12 and the coupling part 15 are integrally formed.

The 1 st fixing portion 11 is a plate-like member. The 1 st fixing portion 11 is disposed so as to overlap the upper column 51 when viewed in the Y direction. The 1 st fixing portion 11 is fixed to the bogie support beam 200 by bolts.

The 2 nd fixing portion 12 is a box-like member. The 2 nd fixing portion 12 is formed by drawing, for example. The 2 nd fixing unit 12 is disposed forward of the 1 st fixing unit 11. The 2 nd fixing portion 12 is disposed so as to overlap the lower column 54 when viewed in the Y direction. The width of the 2 nd fixing part 12 in the X direction is smaller than the width of the 1 st fixing part 11 in the X direction. The 2 nd fixing portion 12 is fixed to the bogie support beam 200 by a bolt. As shown in fig. 13, the 2 nd fixing part 12 has an upper wall 121, two side walls 123, a rear wall 125, two inclined walls 127, and two rib portions 129.

The upper wall 121 is a plate-like member facing the bogie support beam 200. As shown in fig. 13, the upper wall 121 has two slits 1211 and a recess 1212. The slit 1211 is an elongated hole extending in the Z direction. The slit 1211 is open at an end in the + Z direction. The two slits 1211 are arranged with a space in the X direction. A bolt can be inserted into the slit 1211. The 2 nd fixing portion 12 is connected to the bogie support beam 200 by a bolt inserted into the slit 1211. The recess 1212 is a depression provided on the surface of the upper wall 121 facing the bogie support beam 200. The recess 1212 is disposed between the two slits 1211. As shown in fig. 16, the recess 1212 has a triangular shape when viewed from the Y direction. The width of the recess 1212 in the X direction decreases toward the + Z direction.

As shown in fig. 14, the side wall 123 is a plate-like member orthogonal to the upper wall 121. The thickness direction of the side wall 123 is parallel to the X direction. The side walls 123 are disposed on both sides of the upper wall 121 in the X direction. The side walls 123 extend from both ends of the upper wall 121 in the X direction toward the direction near the lower column 54. The side wall 123 is disposed further outward than the slit 1211 in the X direction. Sidewall 123 has an aperture 1231. The pivot 81 (see fig. 2) can be inserted into the hole 1231.

As shown in fig. 13, the rear wall 125 is a plate-like member orthogonal to both the upper wall 121 and the side wall 123. The rear wall 125 extends from the-Z-direction end of the upper wall 121 toward the direction near the lower column 54. The rear wall 125 is connected to the coupling portion 15.

As shown in fig. 13, the inclined wall 127 is disposed at a corner surrounded by the upper wall 121, the side wall 123, and the rear wall 125. The inclined wall 127 is a plate-like member inclined with respect to all of the upper wall 121, the side wall 123, and the rear wall 125. The inclined wall 127 has a triangular shape when viewed from the thickness direction of the inclined wall 127. The sides of the triangle described by the inclined wall 127 correspond to the edges of the upper wall 121, the side wall 123 and the rear wall 125, respectively. The recess 1212 of the upper wall 121 is disposed between the two inclined walls 127. That is, as shown in fig. 16, one inclined wall 127, one recess 1212, and the other recess 1212 are arranged in this order toward the + X direction.

As shown in fig. 13, the rib 129 protrudes from the rear wall 125 in the-Z direction. The rib 129 is connected to the connection portion 15. The two ribs 129 are disposed at intervals in the X direction. As shown in fig. 16, the rib 129 is disposed between the recess 1212 and the inclined wall 127 in the X direction. The rib 129 is disposed closer to the recess 1212 than a straight line passing through the end in the-Z direction of the slit 1211 and the end in the + Z direction of the 1 st hole 153 of the coupling portion 15. The rib portion 129 has a triangular shape when viewed from the Y direction. The width of the rib portion 129 in the X direction becomes smaller toward the-Z direction.

The coupling portion 15 is a plate-like member. The connecting portion 15 connects the 1 st fixing portion 11 and the 2 nd fixing portion 12. The width of the connecting portion 15 in the X direction is substantially equal to the width of the 1 st fixing portion 11 in the X direction and is larger than the width of the 2 nd fixing portion 12 in the X direction. The coupling portion 15 has a 2 nd hole 151 and two 1 st holes 153. The 1 st hole 153 is a long hole along the Z direction. That is, the 1 st hole 153 is a long hole extending from the 1 st fixing portion 11 toward the 2 nd fixing portion 12. The 1 st hole 153 may be a long hole extending in the axial direction of the upper column 51 (lower column 54). The 1 st hole 153 is disposed on both sides of the 2 nd hole 151. The 2 nd hole 151 is disposed in the center of the connection portion 15. The 2 nd hole 151 is disposed between the two 1 st holes 153. The 2 nd hole 151 is a hole for avoiding interference between the bogie support beam 200 and the roof panel 10. As shown in fig. 9, a part of the bogie support beam 200 is inserted into the 2 nd hole 151. As shown in fig. 10, a part of the bogie support beam 200 is disposed on the-Y direction side of the connecting portion 15.

The 1 st bracket 40 and the 2 nd bracket 80 are members for supporting the steering column 50. The 1 st bracket 40 is also called a tilting bracket. The No. 2 bracket 80 is also called a pivot bracket. The 2 nd stent 80 is disposed on the + Z direction side with respect to the 1 st stent 40. The 1 st bracket 40 is attached to the 1 st fixing portion 11 by bolts. The bolt for connecting the 1 st bracket 40 and the 1 st fixing portion 11 is a bolt for connecting the 1 st fixing portion 11 and the bogie support beam 200. The 2 nd bracket 80 is fixed to the outer circumferential surface of the lower column 54. The 2 nd bracket 80 is attached to the 2 nd fixing unit 12 so as to be rotatable with respect to the 2 nd fixing unit 12. As shown in fig. 2, the 2 nd bracket 80 has a pivot 81 whose axial direction is along the X direction. The pivot 81 is connected to the 2 nd fixing unit 12. The pivot 81 is mounted to the aperture 1231 shown in FIG. 13. The steering column 50 can rotate about the pivot 81.

As shown in fig. 6 and 7, the 1 st bracket 40 has a mounting plate 41, a disengagement capsule 49, a guide pin 47, a 1 st support plate 44, and a 2 nd support plate 45. The mounting plate 41 is disposed on the + Y direction side of the steering column 50. The release capsule 49 is attached to the 1 st fixing portion 11 by a bolt. The bolt for connecting the separation capsule 49 and the 1 st fixing portion 11 is a bolt for connecting the 1 st fixing portion 11 and the bogie support beam 200. That is, the detaching capsule 49 and the 1 st fixing portion 11 are coupled to the bogie support beam 200 by one bolt. The escape capsule 49 is made of a light alloy such as an Aluminum alloy (ADC material) for Die Casting. The mounting plate 41 is connected to a release capsule 49 by a resin member 48 formed by resin injection, for example. At the time of a secondary collision or the like, a load in the + Z direction acts on the steering column 50, whereby the attachment plate 41 moves relative to the detachment capsule 49, and the resin member 48 is broken. Thereby, the upper column 51 and the portion of the 1 st bracket 40 other than the escape capsule 49 are disengaged from the bogie support beam 200. In this way, the 1 st bracket 40 is attached to the 1 st fixing unit 11 so as to be detachable from the 1 st fixing unit 11 when a predetermined load is applied. After the 1 st bracket 40 is detached from the 1 st fixing part 11, the impact is absorbed by the friction between the upper and lower columns 51 and 54.

As shown in fig. 6, the guide pins 47 are mounted to the mounting plate 41. The guide pin 47 passes through the 1 st hole 153 of the coupling portion 15. The guide pin 47 is guided by the inner wall of the 1 st hole 153. Thus, after the 1 st bracket 40 is detached from the 1 st fixing portion 11, the upper column 51 is easily moved straight in the Z direction. In a case where the energy cannot be completely absorbed by the friction between the upper and lower columns 51 and 54, the guide pin 47 reaches the end of the 1 st hole 153 in the + Z direction. In this case, the load acting on the 1 st bracket 40 is transmitted to the coupling portion 15 and the 2 nd fixing portion 12 via the guide pin 47.

As shown in fig. 7, the 1 st support plate 44 and the 2 nd support plate 45 are plate-shaped members extending in the-Y direction from the attachment plate 41. The 1 st support plate 44 and the 2 nd support plate 45 are disposed with a gap in the X direction. The 1 st support plate 44 and the 2 nd support plate 45 sandwich the steering column 50. That is, the steering column 50 is disposed between the 1 st support plate 44 and the 2 nd support plate 45. The 1 st support plate 44 has a long hole 441. The 2 nd support plate 45 has an elongated hole 451. The long holes 441 and 451 extend along an arc centered on the pivot 81 shown in fig. 2 (see fig. 6).

The fastening mechanism 30 is a device for switching between a state in which the position of the steering column 50 can be adjusted and a state in which the position of the steering column 50 is fixed. As shown in fig. 7, the tightening mechanism 30 has a tightening rod 35, a plurality of friction plates 36, a fixed cam 31, a movable cam 32, a nut 34, a thrust bearing 33, an operating rod 39, a housing 37, and a coil spring 38.

As shown in fig. 7, the fastening rod 35 has a shaft portion 350, a head portion 351, and an external thread 352. The stem 350 is a cylindrical member. The lever portion 350 penetrates the long hole 441, the long hole 5141, the long hole 5151, and the long hole 451. The head 351 is disposed at the end of the rod 350 in the + X direction. The external thread 352 is disposed at the-X-direction end of the rod portion 350. The plurality of friction plates 36 are disposed between the head 351 and the 1 st support plate 44. The shank 350 extends through the friction plate 36.

The fixed cam 31 is a substantially disk-shaped member. The fixed cam 31 is disposed on the-X direction side of the 2 nd support plate 45. The fastening rod 35 penetrates the fixed cam 31. The fixed cam 31 is partially fitted into the elongated hole 451. Thereby, the fixed cam 31 cannot rotate with respect to the 2 nd support plate 45.

The movable cam 32 is a substantially disk-shaped member. The movable cam 32 is disposed on the-X direction side of the fixed cam 31. The fastening rod 35 penetrates the movable cam 32. A part of the movable cam 32 is fitted to the operating lever 39. Thereby, the movable cam 32 rotates together with the operation lever 39. Accordingly, the movable cam 32 rotates relative to the fixed cam 31. The movable cam 32 moves in the X direction according to its angle with respect to the fixed cam 31. For example, the movable cam 32 has an inclined surface along the circumferential direction around the tightening rod 35. The fixed cam 31 has a recess into which the inclined surface of the movable cam 32 is fitted. When the movable cam 32 rotates from the state where the inclined surface is fitted into the concave portion, the inclined surface rides on the fixed cam 31, and the movable cam 32 moves in the-X direction.

The operating lever 39 is a member for rotating the movable cam 32. The operating lever 39 is disposed on the-X direction side of the movable cam 32. The fastening rod 35 penetrates the operation rod 39. The operation lever 39 extends into the vehicle compartment and is operated by an operator.

The nut 34 is disposed on the-X direction side of the operating rod 39. The nut 34 is mounted to the external thread 352 of the fastening rod 35. The thrust bearing 33 is disposed between the operating rod 39 and the nut 34. Thus, even if the operating lever 39 is rotated, the nut 34 is not rotated. When the operating lever 39 is rotated, the movable cam 32 is rotated, but the fastening rod 35 and the nut 34 are not rotated.

As shown in fig. 7, the housing 37 is attached to the operating lever 39. The housing 37 is fixed to the operation lever 39 by a fixing member 391. The fixing member 391 is, for example, a bolt. The housing 37 rotates together with the operating lever 39. The housing 37 is disposed on the-X direction side of the operation lever 39. The case 37 covers the top end of the fastening rod 35 and the nut 34.

The coil spring 38 is disposed inside the housing 37. The coil spring 38 is a compression coil spring. One end of the coil spring 38 is in contact with the housing 37. The other end of the coil spring 38 is in contact with the fastening rod 35. The coil spring 38 is compressed in a state of being in contact with the housing 37 and the fastening rod 35. Further, a lubricant is applied to the surface of the coil spring 38. The lubricant is, for example, grease. The operating rod 39 is pulled toward the nut 34 by the coil spring 38. Therefore, even in a state (unlocked state) in which the position of the steering column 50 can be adjusted, no gap is generated between the operating lever 39 and the thrust bearing 33. And thus the rattling of the operation lever 39 can be suppressed.

When the operating lever 39 is rotated in order to separate the movable cam 32 from the fixed cam 31, the head 351 of the fastening rod 35 is pressed by the friction plate 36, and the fixed cam 31 is pressed by the 2 nd support plate 45. Thereby, friction between the head 351 and the friction plate 36, friction between the plurality of friction plates 36, friction between the friction plate 36 and the 1 st support plate 44, and friction between the fixed cam 31 and the 2 nd support plate 45 become large. Therefore, the tightening rod 35 cannot move in the long holes 441 and 451, and the position of the steering column 50 in the Y direction (vertical direction) is fixed. Also, since the upper column 51 is fastened, the width of the slit 513 becomes small. The inner peripheral surface of the upper column 51 is pressed by the outer peripheral surface of the lower column 54. The friction between the upper column 51 and the lower column 54 becomes large. Therefore, the fastening rod 35 becomes unable to move in the elongated hole 5141 and the elongated hole 5151, and the position of the upper column 51 in the Z direction (front-rear direction) is fixed.

When the operating lever 39 is rotated in order to bring the movable cam 32 closer to the fixed cam 31, friction between the head 351 and the friction plate 36, friction between the plurality of friction plates 36, friction between the friction plate 36 and the 1 st support plate 44, and friction between the fixed cam 31 and the 2 nd support plate 45 become small or disappear. Thereby, the tightening rod 35 is movable in the long holes 441 and 451, and the steering column 50 can be adjusted in the Y direction (vertical direction). Further, since the width of the slit 513 of the upper column 51 is increased, the friction between the upper column 51 and the lower column 54 is reduced or eliminated. Therefore, the fastening rod 35 becomes movable in the elongated hole 5141 and the elongated hole 5151, and the position of the upper column 51 in the Z direction (front-rear direction) can be adjusted.

The bogie support beam 200 may not necessarily penetrate the 2 nd hole 151 as shown in fig. 9. The entire portion of the bogie support beam 200 may be disposed on the + Y direction side with respect to the roof panel 10. In this case, the connection portion 15 may not have the 2 nd hole 151. The connection portion 15 may not necessarily have two 1 st holes 153. The connection portion 15 may have one 1 st hole 153 or may not have the 1 st hole 153.

As described above, the ceiling plate 10, the 1 st bracket 40, the 2 nd bracket 80, the upper column 51, and the lower column 54 are provided. The top plate 10 has: a 1 st fixing portion 11 fixed to a bogie support beam 200 provided in a vehicle; a 2 nd fixing portion 12 disposed forward of the 1 st fixing portion 11 and fixed to the bogie support beam 200; and a connecting portion 15 connecting the 1 st fixing portion 11 and the 2 nd fixing portion 12. The 1 st bracket 40 is attached to the 1 st fixing unit 11 so as to be detachable from the 1 st fixing unit 11. The 2 nd bracket 80 is attached to the 2 nd fixing unit 12 so as to be rotatable with respect to the 2 nd fixing unit 12. The upper column 51 is supported by the 1 st bracket 40 and supports the steering shaft 20 connected to the steering wheel 101. The lower column 54 is fixed to the 2 nd bracket 80 and coupled to the upper column 51. The coupling portion 15 has a 1 st hole 153 which is a long hole extending in the axial direction of the upper column 51. The 1 st bracket 40 has a guide pin 47 penetrating the 1 st hole 153. The 2 nd fixing part 12 includes: an upper wall 121 facing the bogie support beam 200; two side walls 123 connected to the 2 nd bracket 80; a rear wall 125 connected to the coupling portion 15; and an inclined wall 127 which is disposed at a corner surrounded by the upper wall 121, the side wall 123, and the rear wall 125 and is inclined with respect to all of the upper wall 121, the side wall 123, and the rear wall 125. The upper wall 121 has a recess 1212 provided in a surface facing the bogie support beam 200 and disposed between the two inclined walls 127.

When the vehicle collides, a secondary collision occurs in which the operator collides with the steering wheel 101. When a load exceeding a predetermined load is applied to the steering wheel 101, the 1 st bracket 40 is detached from the 1 st fixing portion 11. Thereafter, the guide pin 47 is guided by the 1 st hole 153, so that the 1 st bracket 40 moves in the axial direction of the upper column 51 (lower column 54). The upper column 51 moves together with the 1 st carriage 40. The impact is absorbed by the friction between the upper column 51 and the lower column 54. However, in the case where energy exceeding the energy that can be absorbed by the friction between the upper column 51 and the lower column 54 acts on the steering device 100, the load acting on the 1 st bracket 40 is transmitted to the 2 nd fixing portion 12 via the guide pin 47. In the steering device 100 of the present embodiment, the 2 nd fixing portion 12 includes the upper wall 121, the side wall 123, the rear wall 125, and the inclined wall 127, and the upper wall 121 includes the recess 1212. Therefore, the rigidity of the 2 nd fixing portion 12 becomes high. Even when a large load is applied to the 2 nd fixing portion 12, the 2 nd fixing portion 12 is not easily deformed. Therefore, the steering device 100 of the present embodiment can suppress the fall of the steering wheel 101.

In the steering device 100, the 2 nd fixing portion 12 has a rib portion 129 that protrudes from the rear wall 125 and is connected to the connecting portion 15. Thus, the rib 129 supports between the rear wall 125 and the coupling portion 15, and therefore the 2 nd fixing portion 12 is less likely to bend relative to the coupling portion 15. The steering device 100 of the present embodiment can further suppress deformation of the 2 nd fixing unit 12 when a load acts on the 2 nd fixing unit 12.

In the steering device 100, the connection portion 15 has a 2 nd hole 151 into which a part of the steering support beam 200 is inserted. Thus, the steering device 100 of the present embodiment can suppress interference between the bogie support 200 and the roof panel 10 even when the bogie support 200 is disposed relatively close to the roof panel 10.

In the steering device 100, the 1 st hole 153 is disposed on both sides of the 2 nd hole 151, and thus the two guide pins 47 are guided by the 1 st hole 153, respectively. The 1 st bracket 40 moves more straightly along the axial direction of the upper column 51 (lower column 54). Therefore, the energy that can be actually absorbed by the friction between the upper column 51 and the lower column 54 does not easily deviate from the design value. The steering device 100 of the present embodiment can absorb predetermined energy by friction between the upper column 51 and the lower column 54, and can suppress deformation of the 2 nd fixing portion 12.

Claims (4)

1. A steering device is characterized in that a steering wheel is provided,

the steering device is provided with a top plate, a 1 st bracket, a 2 nd bracket, an upper column and a lower column,

the top plate has: a first fixing part 1 fixed to a steering support beam provided in a vehicle; a 2 nd fixing portion that is disposed forward of the 1 st fixing portion and is fixed to the bogie support beam; and a connecting part for connecting the 1 st fixing part and the 2 nd fixing part,

the 1 st bracket is detachably attached to the 1 st fixing part with respect to the 1 st fixing part,

the 2 nd bracket is rotatably mounted to the 2 nd fixing unit with respect to the 2 nd fixing unit,

the upper column is supported by the 1 st bracket and supports a steering shaft connected with a steering wheel,

the lower column is fixed on the No. 2 bracket and is connected with the upper column,

the coupling portion has a 1 st hole as a long hole extending in the axial direction of the upper column,

the 1 st bracket has a guide pin penetrating the 1 st hole,

the 2 nd fixing part includes: an upper wall facing the bogie support beam; two sidewalls connected to the 2 nd bracket; a rear wall connected to the coupling portion; and an inclined wall which is disposed at a corner surrounded by the upper wall, the side wall, and the rear wall and is inclined with respect to all of the upper wall, the side wall, and the rear wall,

the upper wall has a recess disposed between the two inclined walls and provided on a surface facing the bogie support beam.

2. Steering device according to claim 1,

the 2 nd fixing portion has a rib portion protruding from the rear wall and connected to the coupling portion.

3. Steering device according to claim 1 or 2,

the connecting portion has a 2 nd hole into which a part of the bogie support beam is inserted.

4. Steering device according to claim 3,

the 1 st hole is disposed on both sides of the 2 nd hole.

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