JP6273694B2 - Steering device - Google Patents

Description

  The present invention relates to a steering device.

In the steering device, a secondary collision in which the driver hits the steering wheel occurs following a primary collision in which the vehicle hits another vehicle. In order to absorb the impact at the time of the secondary collision, various structures have been proposed in which a part of the steering column is detached from the vehicle body and moved in the column axial direction.
For example, in FIG. 9 of Patent Document 1, a pair of locking notches extending in parallel to the column axis direction is provided on the vehicle body side bracket fixed to the vehicle body. The column side bracket is supported via a pair of locking capsules held by a plurality of locking pins in each locking notch. Each locking capsule is coupled and fixed to the column side bracket via a bolt that passes through each locking notch.

The plurality of locking pins for holding the pair of locking capsules are arranged between a pair of locking notches and extend in parallel with the column axial direction, and two column inner locking pins, With respect to the orthogonal direction (corresponding to the width direction of the vehicle), it includes two outer rows of locking pins that are arranged on both sides of the pair of locking notches and extend parallel to the column axial direction.
At the time of the secondary collision, the plurality of locking pins holding the respective locking capsules are sheared, whereby each locking capsule is detached from the corresponding locking notch, and the locking capsule and the column bracket are connected to the column. Move along the axis.

JP 2012-121538 A

However, at the time of the secondary collision, the timing for starting the movement of the column side bracket relative to the vehicle body side bracket and the timing for the locking pin to break are the same timing, so the movement start load of the column side bracket and the shearing load of the locking pin There is a problem that a high peak load occurs due to the superposition of.
Therefore, an object of the present invention is to provide a steering device that can reduce a peak load at the time of a secondary collision.

In order to achieve the above object, the invention of claim 1 is a first plate (30; 30P) fixed to a vehicle body side member (13), which extends in parallel with the column moving direction (X1) and the column. Steering bracket (23; 23P) including a first plate formed with a pair of long holes (31) spaced apart in a direction (Y1) perpendicular to the moving direction, and a steering member (2) connected to one end A movable jacket (16) that rotatably supports the shaft (3), and supports the movable jacket so as to move in the column movement direction (X1) together with the movable jacket at the time of a secondary collision, and faces the first plate. The movable bracket (24; 24P) including the second plate (32; 32P) is inserted through the pair of long holes of the first plate, and the first plate and the second plate are connected to each other, thereby connecting the first plate and the second plate. Movable bracket Through comprising hung a pair of hanging shaft (25) said movable jackets, a secondary with said second plate at the time of collision suspended to be movable in the column direction of movement mechanism (T1, T2), the column direction of movement The first hole (66; 66P) provided in the first plate and the second hole (67; provided in the second plate) are disposed at a central position between the pair of long holes in a direction orthogonal to the first plate. 67P) to connect the first plate and the second plate, and to provide a single resin pin for shearing at the time of a secondary collision to separate the second plate from a predetermined position of the first plate. (61), and the first hole so that a shear load of the resin pin is generated after a predetermined time delay after a movement start load of the second plate of the movable bracket is generated at the time of a secondary collision. In the direction of column movement of the resin pin. Steering in which at least one of the first gap (S1) formed and the second gap (S2) arranged in the second hole in the direction (X2) opposite to the column movement direction of the resin pin is provided. A device (1; 1P) is provided.

  In addition, although the alphanumeric character in a parenthesis represents the corresponding component etc. in embodiment mentioned later, this does not mean that this invention should be limited to those embodiment as a matter of course. The same applies hereinafter.

  According to the first aspect of the present invention, for example, when the first gap is provided in the column movement direction with respect to the resin pin in the first hole of the first plate of the fixed bracket, the second of the movable bracket is provided at the time of the secondary collision. After the plate starts moving, the resin pin is sheared with a delay by the time required for the second plate to move for the first gap. Therefore, after the movement start load of the movable bracket is generated, a shear load of the resin pin is generated with a predetermined time delay, so that the peak load as a whole can be reduced.

1 is a schematic side view of a steering device according to a first embodiment of the present invention, and shows a schematic configuration of the steering device. It is a schematic sectional drawing of the steering device of 1st Embodiment, and has shown the cross section which follows the II-II line of FIG. It is a disassembled perspective view of the steering device of a 1st embodiment. In 1st Embodiment, it is a partially broken schematic plan view of a fixed bracket, a pair of suspension mechanisms, and a connection / release mechanism. In 1st Embodiment, it is sectional drawing of the column moving direction of a 1st board, a 2nd board, and a connection / detachment mechanism, (a)-(c) sequentially shows operation | movement of the connection / detachment mechanism at the time of a secondary collision. It shows. It is a disassembled perspective view of the steering device of 2nd Embodiment of this invention. In 2nd Embodiment, it is sectional drawing of the column movement direction of a 1st board, a 2nd board, and a connection / disconnection mechanism, (a)-(c) sequentially shows the operation | movement of the connection / disconnection mechanism at the time of a secondary collision. It shows.

A preferred embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing a schematic configuration of a steering apparatus according to a first embodiment of the present invention. Referring to FIG. 1, a steering apparatus 1 includes a steering shaft 3 connected to a steering member 2 such as a steering wheel, an intermediate shaft 5 connected to the steering shaft 3 via a universal joint 4, and an intermediate shaft 5. A pinion shaft 7 connected via a universal joint 6 and a rack shaft 8 as a steered shaft having a rack 8a meshing with a pinion 7a provided in the vicinity of the end of the pinion shaft 7 are provided.

  A steering mechanism A1 is configured by a rack and pinion mechanism including the pinion shaft 7 and the rack shaft 8. The rack shaft 8 is supported by a housing 10 fixed to the vehicle body side member 9 so as to be movable in an axial direction along the left-right direction of the vehicle (a direction orthogonal to the paper surface). Although not shown, each end of the rack shaft 8 is connected to a corresponding steered wheel via a corresponding tie rod and a corresponding knuckle arm.

The steering shaft 3 includes an upper shaft 11 and a lower shaft 12 that are connected to each other so as to be able to rotate together and to be relatively movable in the axial direction by using, for example, spline coupling. The steering shaft 3 is rotatably supported by a steering column 15 fixed to the vehicle body side members 13 and 14 via a bearing (not shown).
The steering column 15 includes a cylindrical upper jacket 16 (movable jacket) that is fitted so as to be relatively movable in the axial direction, a cylindrical lower jacket 17, and a housing 18 that is connected to the lower axial end of the lower jacket 17. I have. The housing 18 houses a speed reduction mechanism 20 that decelerates the power of the steering assisting electric motor 19 and transmits it to the lower shaft 12. The speed reduction mechanism 20 includes a drive gear 21 that is coupled to a rotation shaft (not shown) of the electric motor 19 so as to be able to rotate together with the drive gear 21 and a driven gear 22 that meshes with the drive gear 21 and rotates along with the lower shaft 12. .

  In the present embodiment, the steering device 1 will be described based on an example in which the steering device 1 is applied to an electric power steering device. However, the present invention may be applied to a manual steering device. In the present embodiment, the case where the steering device 1 is adjustable in tilt will be described. However, the present invention may be applied to a steering device that does not have a tilt adjustment function, and tilt adjustment is possible. The present invention may be applied to a steering device capable of telescopic adjustment.

  As shown in FIG. 2 which is a schematic sectional view, the steering device 1 includes a pair of suspension mechanisms T1 and T2 that are supported by a fixed bracket 23 and suspend the upper jacket 16 through a tilt bracket 24 as a movable bracket. ing. The suspension mechanisms T1 and T2 move together with the tilt bracket 24 and the upper jacket 16 in the column movement direction X1 (see FIG. 1; a direction perpendicular to the paper surface in FIG. 2) together with the tilt bracket 24 and the upper jacket 16.

  That is, as shown in FIGS. 1 and 2, a tilt bracket 24 as a movable bracket is suspended from a fixed bracket 23 fixed to a vehicle body side member 13 as a suspension shaft of a pair of suspension mechanisms T1 and T2. It is suspended via a bolt 25. On the other hand, a column bracket 26 is fixed to the upper jacket 16 of the steering column 15.

As shown in FIG. 1 and FIG. 2, the steering device 1 has the position of the column bracket 26 after the tilt adjustment (and thus the upper jacket 16) via the tilt bracket 24 by the tightening shaft 28 according to the operation of the operation lever 27. And a lock mechanism 29 for locking and releasing the position of the steering member 2.
As shown in FIGS. 2 and 3, the tilt bracket 24 includes a pair of side plates 41. As shown in FIG. 2, the column bracket 26 has a pair of side plates 41 facing the pair of side plates 41. The groove plate is provided with a side plate 71 and a connecting plate 72 that connects the lower ends of the pair of side plates 71.

  Referring to FIG. 2, the tightening shaft 28 includes bolts that penetrate the side plates 41 and 71 of the tilt bracket 24 and the column bracket 26. By rotating the nut 73 screwed to the tightening shaft 28 by rotating the operation lever 27, the both side plates 41 and 71 are tightened between the head of the bolt as the tightening shaft 28 and the nut 73, Both side plates 41 and 71 are locked. Thereby, the position of the steering member 2 after the tilt adjustment is locked to achieve the tilt lock.

Further, the steering device 1 connects the first plate 30 of the fixed bracket 23 and the second plate 32 of the tilt bracket 24 so that the second plate 32 is placed at a predetermined position of the first plate 30 at the time of a secondary collision [FIG. As shown in FIGS. 5 (b) and 5 (c), a connecting / disconnecting mechanism R1 for disengaging in the column movement direction X1 is provided.
As shown in FIG. 2 and FIG. 4 which is a partially broken schematic plan view, the connection / disengagement mechanism R1 is between the pair of suspension mechanisms T1 and T2 (that is, fixed) in the direction Y1 perpendicular to the column movement direction X1. The first plate 30 of the bracket 23 is disposed between a pair of first holes 31 (to be described later). Specifically, the connecting / disconnecting mechanism R1 is disposed at a central position between the pair of first holes 31 (that is, between the pair of hanging bolts 25) in the direction Y1 orthogonal to the column moving direction X1. Yes.

  Referring to FIG. 1, the fixed bracket 23 includes a first plate 30 that is parallel to the column movement direction X1 (corresponding to the axial direction of the steering shaft 3) at the time of a secondary collision. The first plate 30 is formed with a first hole 31 for the suspension mechanisms T1 and T2, which is a long hole extending in parallel with the column moving direction X1. On the other hand, the tilt bracket 24 (movable bracket) includes a second plate 32 that faces the first plate 30. The second plate 32 is formed with a second hole 33 for the suspension mechanisms T1 and T2 that faces a part of the first hole 31.

  The suspension bolt 25 is constituted by a bolt that passes through the first hole 31 of the first plate 30 and the second hole 33 of the second plate 32 and is screwed into the nut 34. A suspension bolt 25 that connects the first plate 30 and the second plate 32 in cooperation with the nut 34 suspends the upper jacket 16 (movable jacket) via the tilt bracket 24 (movable bracket) and the column bracket 26. Yes. The suspension bolt 25 is movable in the column movement direction X1 along with the tilt bracket 24 (movable bracket), the column bracket 26 and the upper jacket 16 along the first hole 31 at the time of a secondary collision.

A lower bracket 35 fixed to the vehicle body side member 14 supports a tilt center shaft 36 that is a pivot shaft. The tilt center shaft 36 supports the lower jacket 17 through the housing 18 of the steering column 15 so as to be swingable about the tilt center shaft 36.
As shown in FIGS. 2 and 3, each suspension mechanism T1, T2 is composed of a suspension bolt 25, a disc spring 42 as a leaf spring, a nut 34, and the like. The connection / disengagement mechanism R1 includes a resin pin 61 that shears at the time of a secondary collision, and a cylindrical metal collar 62 that is fitted to a part of the resin pin 61 in the axial direction. Instead of the metal collar 62, a color such as high hardness resin or ceramic may be used.

  A resin pin 61 partially fitted with a metal collar 62 has a first hole 66 provided in the first plate 30 of the fixed bracket 23 and a second plate 32 provided in the second plate 32 of the tilt bracket 24 (movable bracket). The second hole 67 is inserted. As shown in FIGS. 3 and 4, the first hole 66 is formed as a long hole extending in the column movement direction X1 at the time of the secondary collision. Specifically, in the first hole 66, the first gap S1 is provided on the column movement direction X1 side of the resin pin 61. On the other hand, as shown in FIG. 3, the second hole 67 is formed in a circular hole.

  Referring to FIG. 3, the fixing bracket 23 includes a pair of side plates 37 extending downward from a pair of side edges of the first plate 30, and a pair of side plates 37 extending outward from the pair of side plates 37. And an attachment plate 38. The fixed bracket 23 is formed of, for example, a sheet metal. Each mounting plate 38 is fixed to the vehicle body side member 13 by a fixing bolt 40 (see FIG. 4) inserted through a screw insertion hole 39 (see FIGS. 3 and 4) provided in each mounting plate 38. Thereby, the fixing bracket 23 is fixed to the vehicle body side member 13.

2 to 4, in the first plate 30 of the fixing bracket 23, a pair of first holes 31 are provided corresponding to the pair of hanging bolts 25. The pair of first holes 31 extend parallel to the column movement direction X1 at the time of the secondary collision, and are separated from each other in a direction Y1 orthogonal to the column movement direction X1.
As shown in FIGS. 2 and 3, the tilt bracket 24 (movable bracket) is formed of, for example, a sheet metal. The tilt bracket 24 includes a second plate 32 and a pair of side plates 41 extending downward from a pair of side edges of the second plate 32, and has a groove shape. The connection part between the second plate 32 and each side plate 41 may be formed in a curved shape as shown in FIGS.

  In the second plate 32 of the tilt bracket 24, a pair of second holes 33 are provided corresponding to the pair of suspension bolts 25. Each suspension bolt 25 includes an annular disc spring 42 as a plate spring, a corresponding insertion hole 44 of the interposition plate 43, a corresponding first hole 31 of the first plate 30, and a corresponding first of the second plate 32. The two holes 33 are sequentially inserted and screwed into the nut 34. As a result, the suspension bolt 25 suspends the tilt bracket 24.

  As shown in FIGS. 3 and 4, the intervening plate 43 is a long plate extending in the direction Y1 perpendicular to the column moving direction X1, and as shown in FIG. 2, the upper surfaces of both the disc springs 42 and the first plate 30. 30a. At least the surface on the first plate 30 side of the interposition plate 43 is made of a low friction material such as a fluororesin. That is, the entire interposed plate 43 may be made of a low friction material, or the surface of the interposed plate 43 on the first plate 30 side may be covered with the low friction material.

As shown in FIG. 3 and FIG. 5A, between the first plate 30 and the second plate 32, the second plate 32 moves in the column movement direction X1 with respect to the first plate 30 during the secondary collision. A first intervening plate 45 and a second intervening plate 46 function to reduce the sliding resistance when moving.
The first interposed plate 45 constitutes a groove-shaped unit 45U that is locked to the first end 321 that is the end of the second plate 32 on the column moving direction X1 side. That is, the unit 45U includes a first interposed plate 45 along the upper surface 32a of the second plate 32 and the lower surface 30b of the first plate 30, and a counter plate facing the first interposed plate 45 and along the lower surface 32b of the second plate 32. 47, and a connecting plate 48 that connects the first interposition plate 45 and the opposing plate 47 and contacts the edge of the second plate 32 on the column moving direction X1 side.

At least the surface on the first plate 30 side of the first interposed plate 45 is made of a low friction material such as a fluororesin. That is, the first interposed plate 45 to the unit 45U may be made of a low friction material, or the surface of the first interposed plate 45 on the first plate 30 side may be covered with the low friction material.
The second intervening plate 46 is a second end 302 that is the end opposite to the column moving direction X1 of the first plate 30 and a second end that is opposite to the column moving direction X1 of the second plate 32. A unit 46U locked to the two end portions 322 is formed. That is, the unit 46U includes a second interposed plate 46 along the upper surface 32a of the second plate 32 and the lower surface 30b of the first plate 30, and a counter plate that faces the second interposed plate 46 and extends along the upper surface 30a of the first plate 30. 49. Further, the unit 46U connects the second interposed plate 46 and the counter plate 49 and contacts the edge of the first plate 30 opposite to the column moving direction X1 and the second plate 32. For example, a hook-shaped hook 51 that is hooked and locked to the two end portions 322 is provided.

At least the surface on the second plate 32 side of the second interposed plate 46 is made of a low friction material such as a fluororesin. That is, the second interposed plate 46 to the unit 46U may be made of a low friction material, or the surface of the second interposed plate 46 on the second plate 32 side may be covered with the low friction material.
As shown in FIGS. 2 and 3, each suspension bolt 25 includes a head 52, a large diameter portion 53 that is continuous with the head 52 and has a smaller diameter than the head 52, and a large diameter portion 53 that is continuous with the large diameter portion 53. A small diameter portion 54 having a small diameter, a step portion 55 formed between the large diameter portion 53 and the small diameter portion 54, and a screw portion 56 provided on the small diameter portion 54 are provided. The head 52 is provided with a tool engaging portion 57 having a hexagonal hole shape, for example.

As shown in FIG. 2, the large diameter portion 53 is inserted through the annular disc spring 42, the insertion hole 44 of the interposed plate 43, and the first hole 31 of the first plate 30. The step portion 55 contacts the upper surface 32a of the second plate 32 and is received by the upper surface 32a. The second plate 32 is sandwiched between the stepped portion 55 and the nut 34, and the suspension bolt 25 and the second plate 32 are fixed.
The distance H1 between the head 52 and the stepped portion 55 (corresponding to the axial length of the large diameter portion 53) is the thickness (or the first thickness) of the first interposed plate 45 interposed between the first plate 30 and the second plate 32. 2), the thickness of the first plate 30, the thickness of the interposed plate 43 along the upper surface 30a of the first plate 30, and the thickness of the disc spring 42 at the time of maximum compression. Has also been enlarged. Thereby, the disc spring 42 elastically biases the first plate 30 toward the second plate 32 via the interposition plate 43.

  With reference to FIG. 5A, the resin pin 61 of the coupling / detaching mechanism R <b> 1 includes, for example, a head 63 having a circular cross section and a cylindrical shaft 64 having a smaller diameter than the head 63. The cylindrical metal collar 62 is fitted on the outer periphery of the shaft portion 64. The outer diameter of the metal collar 62 is made equal to the outer diameter of the head 63 of the resin pin 61. The first end 621 in the axial direction of the metal collar 62 abuts on the head 63 of the resin pin 61, and the second end 622 in the axial direction of the metal collar 62 is received by the upper surface 32 a of the second plate 32. Yes. As a result, the resin pin 61 and the metal collar 62 are prevented from dropping down below the second plate 32.

  On the other hand, the interposition plate 43 is disposed so as to cover the top of the head 63 of the resin pin 61, so that the resin pin 61 is prevented from falling off. In addition, a peep hole 65 smaller than the outer diameter of the head 63 is formed in the interposed plate 43 so as to face the head 63 of the resin pin 61. By visually recognizing the head 63 of the resin pin 61 through the peep hole 65 of the interposition plate 43 after the assembly of the connection / disengagement mechanism R1, it is possible to easily determine a work defect such as forgetting to attach the resin pin 61.

  The head 63 of the resin pin 61 and most of the metal collar 62 are inserted through a first hole 66 formed of a long hole for the connecting / disengaging mechanism R1 of the first plate 30 of the fixing bracket 23. A part of the metal collar 62 protrudes from the first hole 66. A portion of the shaft portion 64 of the resin pin 61 that protrudes from the metal collar 62 is inserted into the second hole 67 for the connecting / disengaging mechanism R1 of the second plate 32 of the tilt bracket 24 (movable bracket). The second hole 67 is formed by a long hole extending in the direction Y1 orthogonal to the column moving direction X1. However, the present invention is not limited thereto, and the second hole 67 may be formed by a circular hole having an inner diameter that is the same as or slightly larger than the outer diameter of the shaft portion 64 of the resin pin 61.

The first hole 66 for the connecting / disconnecting mechanism R1 of the first plate 30 is disposed at the center position between the first holes 31 for the suspension mechanisms T1 and T2 with respect to the direction Y1 orthogonal to the column moving direction X1. Yes. That is, the resin pin 61 is disposed at the center position between the pair of suspension bolts 25 in the direction Y1 orthogonal to the column moving direction X1.
At the time of the secondary collision, the shaft portion 64 of the resin pin 61 is sheared by the displacement of the mating surface between the second end portion 622 of the metal collar 62 and the second plate 32. The shearing blade constituted by the inner peripheral edge of the second end 622 of the metal collar 62 is, for example, an arc shape, and the shearing blade constituted by the edge of the second hole 67 of the second plate 32 is also, for example, an arc shape. is there.

Next, the operation of the connection / disengagement mechanism at the time of the secondary collision will be described with reference to FIGS.
In the state before the secondary collision shown in FIG. 5A, a predetermined amount of the first gap S <b> 1 is provided in the column movement direction X <b> 1 of the resin pin 61 in the first hole 66 of the first plate 30.
When a secondary collision occurs, the second plate 32 of the tilt bracket 24 (movable bracket) is interposed between the resin pin 61 and the metal collar 62 (connection / detachment mechanism R1) with respect to the first plate 30 of the fixed bracket 23. Together with the plate 45 and the unit 45U including the first interposition plate 45, the movement in the column movement direction X1 is started. Although not shown in FIG. 5A, the suspension mechanisms T <b> 1 and T <b> 2 in FIG. 2 also move along with the second plate 32 during the secondary collision.

When the second plate 32 and the resin pin 61 that have started to move move in the column movement direction X1 by a stroke amount corresponding to the gap S1 in the first hole 66, as shown in FIG. 66, the first gap S1 existing on the column movement direction X1 side of the resin pin 61 disappears, and the resin pin 61 (or the metal collar 62) becomes the edge of the first hole 66 on the column movement direction X1 side. The resin pin 61 shears at the timing of contact.

The second plate 32 is further moved in the column moving direction X1, and as shown in FIG. 5C, a part 641 of the shaft part 64 of the resin pin 61 is separated from the remaining part, so that the resin pin 61 Completely shears.
According to the present embodiment, the first gap S <b> 1 is provided on the column movement direction X <b> 1 side with respect to the resin pin 61 in the first hole 66 of the first plate 30 of the fixing bracket 23. At the time of the secondary collision, after the second plate 32 and the resin pin 61 of the tilt bracket 24 (movable bracket) start moving, the second plate 32 and the resin pin 61 move by a stroke amount corresponding to the first gap S1. The resin pin 61 is sheared with a delay for the time required to do so. Accordingly, after the movement start load of the tilt bracket 24 is generated, a shear load of the resin pin 61 is generated with a predetermined time delay, so that the movement start load of the tilt bracket 24 and the shear load of the resin pin 61 are superimposed. The peak load as a whole can be reduced.

Note that the movement start load of the tilt bracket 24 includes a friction load between the intermediate plate 43 and the upper surface 30a of the first plate 30, a friction load between the first intermediate plate 45 and the lower surface 30b of the first plate 30, A friction load between the interposed plate 46 and the upper surface 32a of the second plate 32 is included.
6 and 7 are exploded perspective views of the steering device 1P according to the second embodiment of the present invention. The second embodiment of FIGS. 6 and 7 is mainly different from the first embodiment of FIGS. 2 and 5 as follows.

  That is, in the first embodiment, as shown in FIG. 2, the first hole 66 of the first plate 30 of the fixed bracket 23 is a long hole extending in the column moving direction X1, and the first of the tilt bracket 24 (movable bracket). The second hole 67 of the two plates 32 is a long hole extending in the direction Y1 orthogonal to the column moving direction X1. In the first embodiment, in the state before the secondary collision shown in FIG. 5A, the first gap S <b> 1 is provided in the first hole 66 on the column movement direction X <b> 1 side of the resin pin 61.

On the other hand, in the second embodiment, as shown in FIG. 6, the first hole 66P of the first plate 30P of the fixing bracket 23P is a long hole extending in the direction Y1 orthogonal to the column moving direction X1. Yes. However, the present invention is not limited thereto, and the first hole 66P may be formed by a circular hole having an inner diameter that is the same as or slightly larger than the outer diameter of the metal collar 62. Further, the second hole 67P of the second plate 32P of the tilt bracket 24P (movable bracket) is a long hole extending in the column moving direction X1. In the second embodiment, the column movement direction X1 of the resin pin 61 (or the metal collar 62) in the second hole 67P of the second plate 32P in the state before the secondary collision shown in FIG. A second gap S2 is provided on the opposite direction X2 side.

  When a secondary collision occurs, the second plate 32P of the tilt bracket 24P (movable bracket) is coupled to the first plate 30P of the fixed bracket 23P together with the intervening plate 43 and the unit 45U including the first intervening plate 45. The movement in the movement direction X1 is started. Although not shown in FIG. 7A, the suspension mechanisms T1 and T2 of FIG. 6 also move with the second plate 32P during a secondary collision.

  When the second plate 32P that has started to move moves in the column movement direction X1 by a stroke amount corresponding to the second gap S2 in the second hole 67P, as shown in FIG. The second gap S2 that existed in the direction X2 opposite to the column movement direction X1 of the resin pin 61 disappears, and the resin pin 61 (or the metal collar 62) moves away from the column movement direction X1 of the second hole 67P. Contacts the edge on the opposite direction X2 side, and the resin pin 61 shears at the contact timing.

  The second plate 32P is further moved in the column moving direction X1, and as shown in FIG. 7C, a part 641 of the shaft part 64 of the resin pin 61 is separated from the remaining part, so that the resin pin 61 Completely shears. In the components of the second embodiment shown in FIGS. 6 and 7, the same components as those of the first embodiment of FIGS. 2 and 5 are denoted by the same reference numerals as those of the first embodiment. is there.

  According to this embodiment, the second gap S2 is provided in the second hole 67P of the second plate 32P of the tilt bracket 24P (movable bracket) on the side of the resin pin 61 in the direction X2 opposite to the column movement direction X1. Yes. At the time of the secondary collision, after the second plate 32P of the tilt bracket 24P starts moving, the resin pin 61 is delayed by a time required for the second plate 32P to move by the stroke amount corresponding to the second gap S2. Shears. Therefore, after the movement start load of the tilt bracket 24P is generated, the shear load of the resin pin 61 is generated with a predetermined time delay, so that the movement start load of the tilt bracket 24P and the shear load of the resin pin 61 are superimposed. The peak load as a whole can be reduced.

  The present invention is not limited to the above embodiment, and the first embodiment and the second embodiment may be combined to provide both the first gap S1 and the second gap S2 (not shown). ). In addition, various modifications can be made within the scope of the claims of the present invention.

  DESCRIPTION OF SYMBOLS 1; 1P ... Steering device, 2 ... Steering member, 3 ... Steering shaft, 13 ... Car body side member, 15 ... Steering column, 16 ... Upper jacket (movable jacket), 23; 23P ... Fixed bracket, 24; 24P ... Tilt bracket (Movable bracket), 25 ... hanging bolt, 30; 30P ... first plate, 32; 32P ... second plate, 61 ... resin pin, 62 ... metal collar, 63 ... head, 64 ... shank, 66; 66P ... 1st hole, 67; 67P ... 2nd hole, R1 ... Connection / disengagement mechanism, S1 ... 1st clearance, S2 ... 2nd clearance, T1, T2 ... Suspension mechanism, X1 ... Column movement direction, X2 ... Column movement Direction opposite to direction

Claims (1)

A fixed bracket including a first plate fixed to a vehicle body side member and having a pair of elongated holes extending in parallel to the column moving direction and spaced apart in a direction perpendicular to the column moving direction When,
A movable jacket that rotatably supports a steering shaft having a steering member connected to one end;
A movable bracket that includes a second plate that supports the movable jacket so as to move in the column movement direction together with the movable jacket at the time of a secondary collision, and includes a second plate facing the first plate;
Including a pair of suspension shafts that are respectively inserted into the pair of long holes of the first plate and suspend the movable jacket via the movable bracket by connecting the first plate and the second plate; A suspension mechanism movable in the column movement direction together with the second plate at the time of a secondary collision;
It is arranged at a central position between the pair of long holes in a direction orthogonal to the column moving direction, and is inserted through a first hole provided in the first plate and a second hole provided in the second plate. A single resin pin that connects the first plate and the second plate, shears at the time of a secondary collision, and separates the second plate from a predetermined position of the first plate;
The column movement of the resin pin in the first hole is such that a shear load of the resin pin is generated after a predetermined time delay after the movement start load of the second plate of the movable bracket is generated at the time of a secondary collision. A steering device in which at least one of a first gap arranged in a direction and a second gap arranged in a direction opposite to the column movement direction of the resin pin in the second hole is provided.

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