JP2014024469A - Vehicle steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle steering device which has high torsion support rigidity and can reduce the size and the weight of a lower bracket.SOLUTION: A lower bracket includes: a first bracket 80 fixed to a vehicle body; and a second bracket 84 fixed to an end surface of a housing 11 through a connection bolt 89. A rotation connection part is provided between the first bracket 80 and the second bracket 84, and the second bracket 84 includes: a plate like attachment part 85 which makes a surface contact with an intermediate shaft side end surface of the housing 11; and side plate parts 86 which extend from both ends of the attachment part 85 in an axial direction of a steering shaft 30 and relate to the rotation connection part. A support part 13, which extends from a rotation center of the steering shaft 30 to an outer diameter in a range of the side plate parts 86, is provided in the housing 11. An extension contact surface, which makes a surface contact with the attachment part 85, is formed on an intermediate shaft side end surface of the support part 13.

Description

  The present invention relates to a vehicle steering apparatus attached to a vehicle body via an upper bracket and a lower bracket.

  In the vehicle steering apparatus shown in Patent Document 1, a steering shaft is rotatably supported by a housing via a bearing, and the housing is attached to the vehicle body via an upper bracket and a lower bracket. There are a pair of side plate portions of the lower bracket on both the left and right sides of the housing, and the housing is connected to the pair of side plate portions via a turning connection portion so as to be turnable around a horizontal axis. The lower bracket has a connecting portion that connects the pair of side plate portions in order to increase the strength of the lower bracket.

  This is advantageous in that the torsional support rigidity of the vehicle steering device with respect to the vehicle body around the axis of the steering shaft is supported by the lower bracket on both the left and right sides of the housing via the swivel connecting portion.

JP 2012-41034 A

  Conversely, since the pair of side plate portions are located on the left and right sides of the housing, the electric motor must be provided above the housing, and it has been necessary to consider the vehicle body side so that the electric motor does not interfere. In addition, a large lower bracket surrounding the periphery of the housing has to be used, and there is a problem of increasing the size and weight.

  There is also a vehicle steering device in which a lower bracket is attached to the end surface of the housing on the intermediate shaft side via a connecting bolt, but the torsional support rigidity of the vehicle steering device with respect to the vehicle body around the axis of the steering shaft is low. The present invention has been made to solve the above-described problems. The object of the present invention is to provide high torsional support rigidity of the vehicle steering device with respect to the vehicle body around the axis of the steering shaft, and to consider mounting on the vehicle body. Provided is a vehicle steering device that can be reduced in size and that can reduce the size and weight of a lower bracket.

The invention according to claim 1 is a steering shaft capable of connecting a handle to one end, a housing that rotatably supports the steering shaft via a bearing, and an upper bracket that fixes the housing to a vehicle body on the handle side. In the vehicle steering apparatus comprising a lower bracket for fixing the housing to the vehicle body on the side opposite to the handle,
The lower bracket includes a first bracket that is fixed to the vehicle body, and a second bracket that is fixed to an end surface of the housing opposite to the handle via a connection bolt, and the first bracket and the second bracket. A swivel connecting part is provided between the brackets so as to be turnable around the horizontal axis.
The second bracket extends in the axial direction of the steering shaft from a plate-shaped mounting portion that is in surface contact with the end surface of the housing opposite to the handle, and both ends of the mounting portion with the steering shaft interposed therebetween. A side plate portion that engages with the swivel connection portion;
Provided on the opposite side of the housing to the handle is a support portion extending from the rotation center of the steering shaft in the outer diameter direction within the range of the side plate portion to the vicinity of the side plate portion beyond the connection bolt. An extended contact surface that is in surface contact with the mounting portion is formed on the end surface on the opposite side to the vicinity of the side plate portion.

  According to the first aspect of the present invention, the torsional support rigidity of the vehicle steering device with respect to the vehicle body around the axis of the steering shaft is high, the mounting consideration for the vehicle body can be reduced, and the lower bracket can be reduced in size and weight. A steering apparatus can be provided.

According to a second aspect of the present invention, the first bracket according to the first aspect is sandwiched between the top plate portion fixed to the vehicle body and positioned above the mounting portion of the second bracket, and the steering shaft. A side plate portion extending downward from both ends of the top plate portion to the mounting portion of the second bracket;
The support portion extends radially from the center of rotation of the steering shaft toward the upper end of the side plate portion and is provided to the vicinity of the upper end of the side plate portion beyond the connection bolt,
The extended contact surface is formed up to the vicinity of the upper end of the side plate portion.

  According to the second aspect of the present invention, the torsional support rigidity of the vehicle steering device with respect to the vehicle body around the axis of the steering shaft can be increased, the consideration for mounting on the vehicle body can be reduced, and the lower bracket can be reduced in size and weight. It is possible to provide a vehicular steering apparatus.

  According to a third aspect of the present invention, the swivel connecting portion according to the first aspect comprises an insertion hole provided in the first bracket and the second bracket, and a connection pin inserted through the both insertion holes, A guide hole connected to the insertion hole is formed in one of the first bracket and the second bracket so as to extend in the axial direction of the steering shaft, and a secondary collision load acts around the insertion hole connected to the guide hole. Until then, a holding device for holding the connecting pin in the insertion hole is provided.

  According to the third aspect of the present invention, the lower bracket can be provided with both the turning support function of the housing and the absorption function of the secondary collision load. In addition, the lower bracket can reliably absorb the secondary collision load, and can ensure the driver's living space at the time of the secondary collision.

  The invention described in claim 4 is characterized in that the holding device in claim 2 is a pair of claws.

  According to the fourth aspect of the present invention, an inexpensive holding device can be provided with a simple structure.

  According to the present invention, there is provided a vehicle steering apparatus in which the torsional support rigidity of the vehicle steering apparatus with respect to the vehicle body around the axis of the steering shaft is high, the consideration for attachment to the vehicle body can be reduced, and the lower bracket can be reduced in size and weight. can do.

The top view of the steering device for vehicles in one embodiment of the present invention 1 is a view in the direction of arrow A in FIG. 1 according to an embodiment of the present invention. 1 is a view in the direction of arrow B in FIG. 1 according to an embodiment of the present invention. FIG. 1 is a view corresponding to arrow B in FIG. 1 excluding the lower bracket according to the embodiment of the present invention. CC sectional view of FIG. 2 in one embodiment of the present invention. The perspective view of the lower bracket in one embodiment of the present invention

  An embodiment of the present invention will be described with reference to FIGS. 1 to 6. 1 is a plan view of the vehicle steering apparatus, FIG. 2 is a view as seen from the arrow A in FIG. 1, FIG. 3 is a view as seen from the arrow B in FIG. 1, and FIG. FIG. 5 is a view corresponding to a view, FIG. 5 is a view taken along arrow C in FIG. 1, and FIG. 6 is a perspective view of a lower bracket.

  As shown in FIGS. 1 to 3, the vehicle steering apparatus 10 includes housings 11 and 20, a steering shaft 30 that is rotatably supported by the housings 11 and 20 via a rolling bearing (not shown), and a steering wheel side. It has an upper bracket 40 for attaching the housing 20 to the vehicle body 90 and lower brackets 80 and 84 for attaching the housing 11 to the vehicle body 93 on the intermediate shaft side.

  The housing rotatably supports a steering tube 20 that rotatably supports a steering shaft 30 via a rolling bearing (not shown) and a rotary shaft 15 that is rotatably connected to the steering shaft 30 via a rolling bearing (not shown). A gear housing 11. The gear housing 11 and the steering tube 20 are integrated by press fitting the steering tube 20 into the inner periphery of the gear housing 11.

  A steering wheel (not shown) is connected to one end of the steering shaft 30, and an intermediate shaft (not shown) is connected to the other end of the rotating shaft 15. The steering shaft 30 and the rotary shaft 15 are coaxially connected to each other via a torsion bar (not shown). The intermediate shaft is further connected to the tire via an unillustrated pinion shaft and rack shaft.

  As shown in FIG. 4, the gear housing 11 includes a rotary shaft 15, a speed reduction mechanism, and a torque sensor. The rotary shaft 15 is rotatably supported by the gear housing 11 via a rolling bearing (not shown). .

  A worm wheel and a worm gear are used as the speed reduction mechanism, and the rotation of the electric motor 19 attached to the gear housing 11 is transmitted to the rotary shaft 15 at a reduced speed via the worm gear and the worm wheel, and is transmitted to the steering wheel. Steering is power-assisted by the electric motor 19.

  A control box (not shown) is fixed to the gear housing 11, and a signal from the torque sensor is sent to the control box via a signal cable (not shown). The control box and the electric motor 19 are connected via a power cable (not shown) so that a voltage corresponding to the torque is supplied to the electric motor 19. That is, steering of the steering wheel is detected by a torque sensor, and power assist corresponding to the torque is obtained by the electric motor 19.

  As shown in FIGS. 1, 2, 3, and 6, the lower bracket is fixed to the gear housing 11 via a first bracket 80 that is fixed to the vehicle body 93 via a fixing bolt 94 and a connecting bolt 89. A second bracket 84, and a third bracket 88 fixed to the second bracket 84 and fixed to the vehicle body via a fixing bolt (not shown). The first bracket 80 and the second bracket 84 are connected to each other so as to be capable of turning around a horizontal axis via a turning connecting portion described later.

  The first bracket 80 includes a top plate portion 81 extending in the left-right direction and a pair of side plate portions 82 extending downward from both left and right ends of the top plate portion 81. The top plate portion 81 is formed with a pair of through holes 81a penetrating in the vertical direction. The shaft portion of the fixing bolt 94 is inserted into the pair of through holes 81a. In the pair of side plate portions 82, guide holes 82a extending in the axial direction of the steering shaft 30 are formed penetrating in the left-right direction.

  A turning support plate 83 is fixed to the pair of side plate portions 82, and an insertion hole is formed in the turning support plate 83 to insert a shaft portion 87 b of a connecting pin 87 described later. An insertion hole for the turning support plate 83 is provided at the end of the guide hole 82a on the steering shaft 30 side. The turning support plate 83 is formed with a notch communicating the insertion hole to the outer diameter side, and a pair of claws are formed around the insertion hole. The pair of claws expands when a shaft portion 87b of a connecting pin 87 described later moves to the side opposite to the steering shaft 30. The pair of claws function as a holding device that holds the shaft portion 87b of the connecting pin 87 in the insertion hole until a secondary collision load is applied.

  The second bracket 84 includes a plate-like attachment portion 85 extending in the left-right direction and a pair of side plate portions 86 extending from the left and right ends of the attachment portion 85 to the opposite side of the steering shaft 30. A pair of through holes 85 a are formed in the attachment portion 85 so as to penetrate in the axial direction of the steering shaft 30. The pair of side plate portions 86 are formed with insertion holes (not shown) penetrating in the left-right direction. A shaft portion of the connection bolt 89 is inserted into the pair of through holes 85 a, and a shaft portion 87 b of a connection pin 87 described later is inserted into the insertion holes of the pair of side plate portions 86.

  The shaft portion 87b of the connecting pin 87 is inserted into the guide hole 82a, the insertion hole of the pair of side plate portions 86 and the insertion hole of the swivel support plate 83, and the head portions 87a are formed at both ends of the shaft portion 87b. The bracket 80 and the second bracket are connected to each other so as to be pivotable about a horizontal axis. That is, the swivel connecting portion has a connecting pin 87, a swivel support plate 83, and an insertion hole for the pair of side plate portions 86, and connects the first bracket 80 and the second bracket so as to be able to swivel around the horizontal axis. It has a function.

  The third bracket 88 includes a first connection portion 88a extending in the left-right direction, an extension portion 88b extending from the right end of the first connection portion 88a toward the steering shaft 30 side, and a second connection portion 88c extending rightward from the upper end of the extension portion 88b. It is made up of. The first connection portion 88a is provided in parallel with the attachment portion 85 of the second bracket 84, and is fixed to the attachment portion 85 by welding or the like. The second connection portion 88c is fixed to the vehicle body via a fixing bolt (not shown).

  As shown in FIGS. 1, 2, and 5, the upper bracket 40 is fixed to the vehicle body 90 via a detachment device, and is connected to the steering tube 20 via a lock mechanism. The upper bracket 40 can be fixed to the vehicle body 90 until the secondary impact load is applied by the detaching device, and the upper bracket 40 can be detached from the vehicle body 90 when the secondary impact load is applied to the handle. By the lock mechanism, the steering tube 20 can be fixed at an arbitrary turning position around the horizontal axis. That is, the lock mechanism is used for tilt adjustment for adjusting the height of the handle.

  The detaching device has a capsule 55 fitted in a mounting groove 42 (to be described later) of the upper bracket 40, and a fixing bolt 91 and a nut 92 that are inserted into the capsule 55 and the vehicle body 90 and fastened to each other. When a secondary impact load is applied to the handle, the connection between the upper bracket 40 and the capsule 55 is released, and the capsule 55 is detached from the mounting groove 42 of the upper bracket 40.

  The capsule 55 is connected to flat plate portions 56 and 59 for sandwiching a mounting plate 41, which will be described later, a connecting portion 58 for connecting the upper and lower flat plate portions 56 and 59 on the handle side, and the upper flat plate portion 56 and the mounting groove 42. And a cylindrical portion 57 to be fitted into the. An insertion hole 57 a through which the shaft portion of the fixing bolt 91 is inserted is formed in the cylindrical portion 57. The upper flat plate portion 56 is formed with an elastic portion 56a that is curved toward the mounting plate 41 on both the left and right sides with the cylindrical portion 57 interposed therebetween. By compressing the elastic portion 56a with the head of the fixing bolt 91 and the nut 92 through the flat plate portions 56 and 59, static friction force is generated between the lower flat plate portion 59 and the mounting plate 41, and between the elastic portion 56a and the mounting plate 41. And prevents the capsule 55 from being detached from the mounting plate 41.

  The upper bracket 40 has a mounting plate 41 extending in the horizontal direction, a substantially U-shaped support plate 45 fixed to the mounting plate 41 by welding or the like, and a U-shaped cross section disposed inside the support plate 45. It consists of a distance bracket 50. Both ends of the distance bracket 50 are fixed to the steering tube 20 by welding or the like. The mounting plate 41 is formed with mounting grooves 42 that are notched on the handle side on both the left and right sides of the outer tube 21.

  The support plate 45 includes a top plate portion 46 extending in the left-right direction and side plate portions 47 extending downward from both left and right ends of the top plate portion 46.

  The lock mechanism is used at the time of tilt adjustment for adjusting the height of the handle, and fixes the distance bracket 50 to the support plate 45 at an arbitrary position. The lock mechanism includes a tightening bolt 60, a nut 65, a cam mechanism, and a lever 70.

  The tightening bolt 60 includes a head portion 61, a restricting portion, a shaft portion 63, and a screw portion 64, and the head portion 61 and the restricting portion protrude from the shaft portion 63 in the outer diameter direction. The restricting portion is formed with a two-chamfered surface 62 that engages with a long hole 47a described later, and a nut 65 is screwed onto the screw portion 64. The head 61, the restricting portion, the shaft portion 63, and the screw portion 64 are integrally formed by cutting or the like.

  The distance bracket 50 is formed with an insertion hole through which the shaft portion 63 of the tightening bolt 60 is inserted, and the side plate portion 47 is provided with elongated holes 47a and 47b for restricting rotation of the tightening bolt 60 and a cam mechanism described later. It is formed in an arc shape centering on the pivot axis, that is, the horizontal axis.

  The cam mechanism includes a regulation cam 75 and a movable cam 71. The movable cam 71 is rotatably supported by the shaft portion 63. A lever 70 is fitted and fixed to the movable cam 71, and a regulation cam 75 is rotatably supported.

  On the outer periphery of the restriction cam 75, a not-shown two-chamfered surface similar to the two-chamfered surface 62 of the restriction portion is formed. When the two chamfered surfaces of the restriction cam 75 are in sliding contact with the elongated hole 47b, the rotation of the restriction cam 75 is restricted, and the turning position of the steering tube 20 can be changed.

  A cam surface protruding in the axial direction is formed on the opposing surfaces of the restriction cam 75 and the movable cam 71. When the movable cam 71 is rotated with respect to the restriction cam 75, the restriction cam 75 and the movable cam 71 follow the cam surface. Are close to each other in the axial direction.

  The tilt mechanism includes a turning connecting portion, a lock mechanism, an insertion hole, and long holes 47a and 47b, and can adjust the height of the handle.

  As shown in FIGS. 1 to 4, the gear housing 11 has a cylindrical portion 12 with a bottom so as to accommodate a worm wheel of a speed reduction mechanism. A support portion 13 is integrally formed on the outer periphery of the cylindrical portion 12, and the support portion 13 extends radially from the rotation center of the rotation shaft 15 to the outer diameter. More specifically, the support portion 13 extends radially from the rotation center of the rotating shaft 15 to the outer side in the range of the side plate portion 86 and beyond the connecting bolt 89 to the vicinity of the side plate portion 86. The circular end surface of the cylindrical portion 12 and the extended contact surface of the support portion 13 are in surface contact with the mounting portion 85 of the second bracket 84 within a range indicated by hatching F (FIG. 3). The extended contact surface of the support portion 13 is formed up to the vicinity of the side plate portion 86. A pair of screw holes 13a are drilled in the extended contact surface of the support portion 13, and a connecting bolt 89 is screwed into the screw holes 13a.

  When there is no extended contact surface of the support portion 13, only the circular end surface of the cylindrical portion 12 comes into surface contact with the mounting portion 85 of the second bracket 84, and the second weight due to the weight of the gear housing 11 or the like, the moment of the electric motor 19, or the like. The bracket 84 is easily deformed and the torsion support rigidity of the vehicle steering device 10 is low. By providing the support portion 13 and bringing the extended contact surface of the support portion 13 into surface contact with the mounting portion 85 of the second bracket 84, the deformation of the second bracket 84 due to the weight of the gear housing 11 and the like, and the moment of the electric motor 19 and the like. Thus, the torsion support rigidity of the vehicle steering device 10 can be increased.

  The support portion 13 extends radially from the rotation center of the rotary shaft 15 toward the upper end of the side plate portion 86 and beyond the connecting bolt 89 to the vicinity of the upper end of the side plate portion 86, and the extended contact surface of the support portion 13 is the side plate portion 86. The portion formed to the vicinity of the upper end of the vehicle can further suppress the deformation of the second bracket 84 due to the weight of the gear housing 11 and the like, and the moment of the electric motor 19 and the like, and can further increase the torsion support rigidity of the vehicle steering device 10. .

  Since the lower bracket 80 is attached to the end surface of the gear housing 11 on the intermediate shaft side, the degree of freedom of attachment of the electric motor 19 to the gear housing 11 is increased, and attachment considerations to the vehicle body can be reduced. Since the lower bracket 80 does not need to have a shape surrounding the gear housing 11, the lower bracket 80 can be reduced in size and weight.

  Next, the assembly operation will be described based on the above-described configuration.

  The turning support plate 83 is fixed to the pair of side plate portions 82 of the first bracket 80, and the second bracket 84 is disposed inside the first bracket 80. The shaft portion 87b of the connecting pin is inserted into the insertion hole of the turning support plate 83, the guide hole 82a, and the insertion hole of the side plate portion 86, and head portions 87a are formed at both ends of the shaft portion 87b. Thus, the first bracket 80 and the second bracket are connected to each other so as to be pivotable about the horizontal axis. The lower bracket 80 is fixed to the vehicle body 93 via fixing bolts 94, and the gear housing 11 is connected to the lower bracket 80 via connecting bolts 89. The capsule 55 is fitted into the mounting groove 42 of the mounting plate 41, the fixing bolt 91 is inserted into the vehicle body 90 and the capsule 55, the nut 92 is screwed into the thread portion of the fixing bolt 91, and the vehicle body 90 and the capsule 55 are fastened. Thus, the vehicle steering device 10 is attached to the vehicle bodies 90 and 93.

  Next, a tilt adjustment operation for changing the height of the handle will be described.

  When the movable cam 71 is rotated in one direction together with the lever 70, the regulating cam 75 and the movable cam 71 approach each other in the axial direction by the cam surface, and the distance bracket 50 by the head 61 and the nut 65 is tightened by the support plate 45. Accordingly, the steering tube 20 can be turned around the horizontal axis.

  When the steering tube 20 is fixed at an arbitrary position, the movable cam 71 is rotated in the other direction together with the lever 70. As a result, the restricting cam 75 and the movable cam 71 are separated from each other in the axial direction by the cam surface, and the force to tighten the distance bracket 50 by the head 61 and the nut 65 with the support plate 45 is increased. A frictional force is generated between the plates 45.

The operation when a secondary impact load is applied to the handle will be described.
The secondary impact load caused by the driver hitting the steering wheel acts on the steering tube 21, the distance bracket 50, the support plate 45, and the mounting plate 41, and the steering tube 20, the gear housing 11, the second bracket 84, and the connecting pin 87. Acting on the pair of claws of the turning support plate 83. The capsule 55 is detached from the mounting plate 41 by overcoming the static friction force between the lower flat plate portion 59 and the mounting plate 41 and the static friction force between the elastic portion 56 a and the mounting plate 41. In addition, the pair of claws of the turning support plate 83 are spread and the shaft portion 87b of the connecting pin 87 moves from the insertion hole to the guide hole 82a, and further moves to the opposite side of the steering shaft 30 along the guide hole 82a.

  Thus, the secondary collision load is absorbed by the plastic deformation of the pair of claws of the turning support plate 83, the static friction force between the lower flat plate portion 59 and the mounting plate 41, and the static friction force between the elastic portion 56a and the mounting plate 41. Is absorbed by. The driver's living space is ensured by moving the steering shaft 30 forward together with the steering wheel during the secondary collision.

  When the secondary impact load acts on the connecting pin 87 via the gear housing 11 and the second bracket 84, the support portion 13 is provided so that the extended contact surface of the support portion 13 faces the mounting portion 85 of the second bracket 84. By making the contact, the torsional deformation of the second bracket 84 due to the weight of the gear housing 11 and the like, and the moment of the electric motor 19 and the like can be suppressed. As a result, the connecting pin 87 can be smoothly moved along the guide hole 82a.

  The present invention is not limited to these embodiments, and can of course be implemented in various modes without departing from the gist of the present invention.

  In the embodiment described above, the turning support plate 83 is fixed to the first bracket 80, the guide hole 82 a is formed, and the insertion hole is formed in the second bracket 84. As another embodiment, the turning support plate 83 may be fixed to the second bracket 80, the guide hole 82 a may be formed, and the insertion hole may be formed in the first bracket 84.

  In the embodiment described above, the support portion 13 is applied to a vehicle steering device in which the steering tube 20 and the steering shaft 30 do not expand and contract in the axial direction at the time of a secondary collision. As another embodiment, the support portion 13 may be applied to a vehicle steering apparatus in which the steering tube 20 and the steering shaft 30 extend and contract in the axial direction at the time of a secondary collision.

  In the above-described embodiment, the support portion 13 is applied to a vehicle steering apparatus that does not have telescopic adjustment but has tilt adjustment. As another embodiment, the support portion 13 may be applied to a vehicle steering apparatus having telescopic adjustment and tilt adjustment.

  11: Gear housing (housing), 13: Support portion, 20: Steering tube (housing), 30: Steering shaft, 40: Upper bracket, 41: Mounting plate, 50: Distance bracket, 55: Capsule (detaching device), 56 : Pin (detachment device), 80: first bracket (lower bracket), 82a: guide hole, 83: turning support plate (turning connecting portion), 84: second bracket (lower bracket), 85: mounting portion, 86: Side plate portion, 87: connecting pin (turning connecting portion), 89: connecting bolt, 90: vehicle body, 93: vehicle body

Claims (4)

A steering shaft that can be connected to a handle at one end, a housing that rotatably supports the steering shaft via a bearing, an upper bracket that fixes the housing to the vehicle body on the handle side, and the housing on the opposite side of the handle In a vehicle steering apparatus provided with a lower bracket for fixing the
The lower bracket includes a first bracket that is fixed to the vehicle body, and a second bracket that is fixed to an end surface of the housing opposite to the handle via a connection bolt, and the first bracket and the second bracket. A swivel connecting part is provided between the brackets so as to be turnable around the horizontal axis.
The second bracket extends in the axial direction of the steering shaft from a plate-shaped mounting portion that is in surface contact with the end surface of the housing opposite to the handle, and both ends of the mounting portion with the steering shaft interposed therebetween. A side plate portion that engages with the swivel connection portion;
Provided on the opposite side of the housing to the handle is a support portion extending from the rotation center of the steering shaft in the outer diameter direction within the range of the side plate portion to the vicinity of the side plate portion beyond the connection bolt. An extended contact surface that is in surface contact with the mounting portion is formed on the end surface on the opposite side to the vicinity of the side plate portion. The first bracket is fixed to the vehicle body and is positioned above the mounting portion of the second bracket, and the second bracket from both ends of the top plate with the steering shaft interposed therebetween. A side plate portion extending downward to the mounting portion,
The support portion extends radially from the center of rotation of the steering shaft toward the upper end of the side plate portion and is provided to the vicinity of the upper end of the side plate portion beyond the connection bolt,
The vehicle steering apparatus according to claim 1, wherein the extended contact surface is formed up to a vicinity of an upper end of the side plate portion. The swivel connection portion includes an insertion hole provided in the first bracket and the second bracket, and a connection pin inserted through the both insertion holes, and is provided on one of the first bracket and the second bracket. A guide hole connected to the insertion hole is formed to extend in the axial direction of the steering shaft, and the connection pin is held in the insertion hole until a secondary collision load acts around the insertion hole connected to the guide hole. The vehicle steering apparatus according to claim 1, further comprising a holding device that performs the operation. The vehicle steering apparatus according to claim 2, wherein the holding device is a pair of claws.

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