JP2006341658A - Vehicular steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular steering device capable of shortening the axial dimensions of a steering portion, and having vehicle mounting performance. <P>SOLUTION: The vehicular steering device comprises a clutch 6 mechanically disengaging a steering portion A having a steering wheel 1 and a reaction force actuator 3, and a steering portion B steering steering wheels 22, 22; and a back-up means (a cable type column 10) provided between the clutch 6 and the steering portion B, and transmitting steering torque inputted by the steering wheel 1 at the time of clutch engagement to the steering wheels 22, 22. A rotating direction converting means 4 outputting while making a rotating axis direction of the clutch 6 different to a rotating axis direction of the steering wheel 1 is provided between the reaction force actuator 3 and the clutch 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle steering apparatus used in a steer-by-wire system or the like in which there is no mechanical connection between a steering unit that receives a steering input from a driver and a steering unit that steers steered wheels. It belongs to the technical field.

In a conventional steer-by-wire system, a handle shaft cable pulley of a reaction force actuator, a clutch, and backup means is connected to a column shaft connected to a handle (see, for example, Patent Document 1).
JP 2002-225733 A

  However, in the above prior art, the reaction force actuator, the clutch, and the handle side cable pulley are arranged on the same axis, so that there is a problem that the axial dimension of the steering unit is long and the vehicle mounting property is inferior. .

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a vehicle steering apparatus that can shorten the axial dimension of the steering section and is excellent in vehicle mountability.

In order to achieve the above object, the present invention provides:
A steering part having an operation input means and a reaction force actuator, and a steering part that steers the steered wheels are mechanically disconnected, and a clutch that mechanically connects the steering part and the steering part, and this clutch In a vehicle steering apparatus comprising backup means provided between the steered portion and transmitting steering torque input by the operation input means to the steered wheels when the clutch is engaged,
Rotational direction conversion means is provided between the reaction force actuator of the steering section and the clutch. The rotational direction conversion means outputs the rotational axis direction of the clutch different from the rotational axis direction of the operation input means.

  In the present invention, since it is possible to avoid the clutch being arranged on the rotation axis of the operation input means, the axial dimension of the steering portion can be shortened, and the vehicle mountability can be improved compared to the prior art. . In addition, since the rotation direction conversion means is provided on the steered wheel side of the reaction force actuator, the influence of the friction, etc., which the rotation direction conversion means has on the steering reaction force applied from the reaction force actuator to the operation input means. Can be avoided and deterioration of the steering feeling can be prevented.

  Hereinafter, the best mode for carrying out the present invention will be described based on Examples 1 to 9.

First, the configuration will be described.
[overall structure]
FIG. 1 is an overall configuration diagram illustrating a steer-by-wire system to which a vehicle steering apparatus according to a first embodiment is applied. The vehicle steering apparatus according to the first embodiment includes a steering section A, a cable column 10, a steering section B, and a control controller 19. Each configuration will be described below.

  As shown in FIG. 2, the steering section A includes a handle (operation input means) 1, a column shaft 2, a reaction force actuator 3, a rotation direction conversion means 4, a clutch 6, a handle angle sensor 13, a resolver. 15.

  The reaction force actuator 3 is a coaxial motor whose output shaft is coaxial with the column shaft 2, and outputs a steering reaction force torque that simulates a road surface reaction force to the column shaft 2 in accordance with a command current value from the controller 19. The rotation direction converting means 4 is provided between the reaction force actuator 3 and the clutch 6 and makes the rotation axis direction of the clutch 6 different from the rotation axis direction of the handle 1 (the axial direction of the column shaft 2). .

  The clutch 6 is interposed between the column shaft 2 and the cable type column 10, and an electromagnetic clutch is used in the first embodiment. When the clutch 6 is engaged, the steering torque applied to the handle 1 is mechanically transmitted to the steering gear 11. The handle angle sensor 13 detects the rotation angle of the column shaft 2. The resolver 15 detects the motor rotation angle of the reaction force actuator 3.

  The cable-type column 10 has a column shaft function for transmitting torque while avoiding interference with a member interposed between the steering part A and the steered part B in the backup mode in which the clutch 6 is engaged. It is a mechanical backup mechanism that demonstrates it. The cable-type column 10 includes two handle reels 10a connected to the column shaft 2 and two pin reels 10b connected to the pinion shaft 21, and two inner ends fixed to the cable reels 10a and 10b. The cables are wound in opposite directions, and both ends of outer tubes 10c, 10c having two inner cables inserted into two reel cases are fixed.

  The steered portion B includes a steering gear 11, a resolver 16, a torque sensor 17, an encoder 18, steered actuators 20 and 20, a pinion shaft 21, and steered wheels 22 and 22. Has been.

  The steering gear 11 is a rack and pinion type steering gear, and steers the steered wheels 22 and 22 according to the rotation of the pinion shaft 21. The steered actuators 20 and 20 are motors connected to the pinion shaft 21 via a speed reducer such as a worm and worm wheel. The steered wheels 22 are connected to the pinion shaft 21 according to a command current value from the controller 19. , 22 is output.

  The resolver 16 detects the motor rotation angle of the steering actuators 20 and 20. The torque sensor 17 detects an input torque to the pinion shaft 21. The encoder 18 detects the rotation angle of the pinion shaft 21.

  The controller 19 receives detection signals from the handle angle sensor 13, the torque sensor 14, the resolvers 15 and 16, the torque sensor 17, and the encoder 18, and based on each sensor signal, the reaction force actuator 3. And the steering actuators 20 and 20 are drive-controlled.

  In normal steer-by-wire control (clutch 6 disengaged state), the rotation angle of the handle 1 is read by the handle angle sensor 13, and the turning amount of the steering gear 11 based on this is calculated by the controller 19 for control. The controller 19 outputs a command current value for driving the steering actuators 20 and 20 to drive the steering gear 11. At this time, the reaction force acting on the steering gear 11 is detected by the torque sensor 17, and a command current value for driving the reaction force actuator 3 is output via the controller 19, and the steering reaction force is applied to the handle 1.

  When an abnormality occurs in the steer-by-wire system, the clutch 6 is engaged to mechanically connect the handle 1 to the steering gear 11. At this time, the operating force of the handle 1 is transmitted in the order of the handle 1, the column shaft 2, the rotation direction conversion means 4, the clutch 6, the cable column 10, and the steering gear 11.

[Detailed configuration of steering section]
FIG. 2 is a diagram illustrating a detailed configuration of the steering unit A according to the first embodiment. The steering unit A is disposed on the vehicle interior side partitioned from the front body via the dash panel 9. The rotation direction conversion means 4 and the clutch 6 are connected by a first shaft 5, and the clutch 6 and the handle side cable reel 10 a are connected by a second shaft 7. By the rotation direction conversion means 4, the direction of the rotation axis m of the handle 1, the column shaft 2 and the reaction force actuator 3 and the direction of the rotation axis n of the first shaft 5, the clutch 6 and the second shaft 7 form a right angle. ing.

  As shown in FIG. 3, the rotation direction conversion means 4 includes an input shaft 4a, an output shaft 4b, bevel gears 4c and 4d, and a casing 4e. One end of the input shaft 4a is connected to the column shaft 2 (the output shaft of the reaction force actuator 3), and the other end is connected to the bevel gear 4c. One end of the output shaft 4b is connected to the first shaft 5, and the other end is connected to the bevel gear 4d.

Next, the operation will be described.
[Axial dimension shortening effect by rotating direction conversion]
FIG. 4 is a diagram showing a steering unit of a conventional steer-by-wire system. The conventional steering unit includes a column shaft connected to a handle, a reaction force actuator, a clutch, and a cable reel on the handle side of a cable type column. Are arranged in series, that is, on the same axis, the axial dimension L0 must be long. The axial dimension of the steering part should be set as short as possible to avoid interference with the dash panel (dashboard) and to prevent the impact force at the time of vehicle collision from being transmitted to the driver via the column shaft. Is preferred.

  On the other hand, in the first embodiment, the rotational direction conversion means 4 that converts the direction of the rotational axis n of the clutch 6 to the direction perpendicular to the direction of the rotational axis m of the handle 1 is provided. The axial dimension L1 can be set shorter than L0. Therefore, the vehicle mountability can be improved and the degree of freedom of layout in the passenger compartment can be increased.

  Further, in the first embodiment, the rotation direction conversion means 4 is interposed between the reaction force actuator 3 and the clutch 6, so that the friction or the like of the rotation direction conversion means 4 is added from the reaction force actuator 3 to the handle 1. Since it does not intervene in the steering reaction force, the influence can be avoided and the deterioration of the steering feeling can be prevented.

Next, the effect will be described.
In the vehicle steering apparatus according to the first embodiment, the following effects can be obtained.

  (1) The steering part A having the steering wheel 1 and the reaction force actuator 3 and the steering part B that steers the steered wheels 22 and 22 are mechanically separated, and the steering part A and the steering part B are mechanically separated. And a backup means (cable-type column) that is provided between the clutch 6 and the steering portion B, and that transmits the steering torque input by the handle 1 to the steered wheels 22 and 22 when the clutch is engaged. 10), a rotation direction conversion means 4 is provided between the reaction force actuator 3 and the clutch 6 to change the rotation axis direction of the clutch 6 with respect to the rotation axis direction of the handle 1. . Therefore, since it is possible to avoid the clutch 6 being disposed on the rotation axis of the handle 1, the axial dimension L1 of the steering portion A can be shortened, and the vehicle mountability can be improved as compared with the prior art. Further, since the rotation direction conversion means 4 is provided on the steered wheels 22 and 22 side of the reaction force actuator 3, it is possible to prevent the steering feeling from being deteriorated due to friction or the like of the rotation direction conversion means 4.

  (2) The rotation direction conversion means 4 outputs the rotation axis direction of the clutch 6 with respect to the rotation axis direction of the handle 1 at an angle smaller than a substantially right angle. Dimensions can be minimized.

  (3) The backup means is the cable type column 10 and the clutch 6 transmits the rotation from the handle 1 to the cable type column 10 in the engaged state, so that the column shaft moves backward into the vehicle interior due to the vehicle collision. Can be prevented.

  (4) Since the reaction force actuator 3 is a coaxial motor whose output shaft is provided coaxially with the column shaft 2, the radial dimension of the column shaft 2 can be reduced and a high output motor can be used. Compared with the configuration in which the output shaft of the motor is connected to the column shaft 2 via a worm and worm wheel, the axial dimension L1 can be set shorter even when a coaxial motor with a longer axial dimension is used. The degree of freedom can be expanded.

First, the configuration will be described.
FIG. 5 is an overall configuration diagram showing a steer-by-wire system to which the vehicle steering device of the second embodiment is applied. The rotation direction converting means 4 of the second embodiment rotates the steering wheel 1 outward in the vehicle width direction. It is arranged to output to. A communication hole 9a through which the outer tubes 10c, 10c of the cable column 10 pass outside the vehicle compartment is formed in the vehicle width direction outer side position of the dash panel 9.

Next, the operation will be described.
[Action to avoid interference with engine room parts]
In the second embodiment, the rotation direction conversion means 4 outputs the rotation of the handle 1 to the outside in the vehicle width direction, so that the outer tubes 10c and 10c of the cable-type column 10 are prevented from interfering with engine room parts. Can be routed around.

Next, the effect will be described.
In the vehicle steering apparatus of the second embodiment, the following effects are obtained in addition to the effects (1) to (4) of the first embodiment.

  (5) The rotation direction converting means 4 outputs the rotation of the handle 1 to the outside in the vehicle width direction, so that when the outer tubes 10c, 10c of the cable column 10 are passed from the vehicle interior to the exterior of the vehicle interior, It is easy to avoid interference with engine room parts.

First, the configuration will be described.
FIG. 6 is an overall configuration diagram showing a steer-by-wire system to which the vehicle steering device of the third embodiment is applied. The rotation direction conversion means 4 of the third embodiment is configured to rotate the handle 1 in the vehicle width direction. It is arranged to output to. A communication hole 9b through which the outer tubes 10c, 10c of the cable column 10 pass outside the vehicle compartment is formed at the center position in the vehicle width direction of the dash panel 9.

Next, the operation will be described.
[Dash panel sharing action]
In the second embodiment, since the communication hole 9a is formed at the outer position in the vehicle width direction of the dash panel 9, it is necessary to provide different dash panels for the right-hand drive vehicle and the left-hand drive vehicle. However, in the third embodiment, the communication hole 9b is provided. Can be formed at the center position in the vehicle width direction of the dash panel 9, so that the dash panel 9 can be shared by the right-hand drive vehicle and the left-hand drive vehicle, and the cost can be reduced.

Next, the effect will be described.
In the vehicle steering apparatus of the third embodiment, the following effects are obtained in addition to the effects (1) to (4) of the first embodiment.

  (6) The rotation direction converting means 4 outputs the rotation of the handle 1 to the inner side in the vehicle width direction, so that the dash panel 9 has a communication hole 9a through which the outer tubes 10c, 10c of the cable column 10 pass from the vehicle interior to the vehicle interior. When providing to, the communication hole 9a can be set in the vehicle width direction center position of the dash panel 9, and the position of the communication hole 9a with respect to the dash panel in a left-right handle vehicle can be shared.

First, the configuration will be described.
FIG. 7 is an overall configuration diagram showing a steer-by-wire system to which the vehicle steering apparatus of the fourth embodiment is applied. The rotation direction converting means 4 of the fourth embodiment rotates the handle 1 downward of the vehicle. Arranged to output.

Next, the operation will be described.
[Action to avoid interference with engine room parts]
In the fourth embodiment, since the rotation of the handle 1 is output downward by the rotation direction converting means 4, the lower portion of the vehicle is arranged so that the outer tubes 10c, 10c of the cable column 10 do not easily interfere with engine room components. You can bypass and plan.

Next, the effect will be described.
In the vehicle steering apparatus of the fourth embodiment, the following effects can be obtained in addition to the effects (1) to (4) of the first embodiment.

  (7) The rotation direction conversion means 4 outputs the rotation of the handle 1 in the downward direction. Therefore, when the outer tubes 10c, 10c of the cable column 10 are passed from the vehicle interior to the exterior of the vehicle interior, Because it can pass through, it is easy to avoid interference with engine room parts.

First, the configuration will be described.
FIG. 8 is a diagram illustrating a configuration of the first shaft 5 that couples the rotation direction converting means 4 and the clutch 6 according to the fifth embodiment. In the fifth embodiment, the first shaft 5 includes two members 23 in the longitudinal direction. The joint portion 25 is provided so that the connection of the two members 23 and 24 is released when a load F in the direction perpendicular to the axial direction is applied. The joint portion 25 has a concave portion 23a formed on the member 23 side, and a convex portion 24a that meshes with the concave portion 23a on the member 24 side. The joint portion 25 has a meshing structure in which the meshing between the concave portion 23a and the convex portion 24a is released when a vertical load F is applied.

Next, the operation will be described.
[Shock absorbing action at the time of collision]
In the event of a vehicle collision (particularly a frontal collision), when an impact force is applied from the handle 1 to the column shaft 2 → the reaction force actuator 3 → the rotation direction changing means 4, the column shaft 2 tends to come off the member. At this time, in Example 5, the first shaft 5 that connects the rotation direction changing means 4 and the clutch 6 is broken, so that the column shaft 2 is dropped from the member. That is, when an impact force is applied to the steering part A, the first shaft 5 is broken, so that the steering part A moves to the dash panel 9 side, and the distance between the handle 1 and the driver can be earned. The impact on the driver is reduced. Note that, when the vehicle collides, the dash panel 9 is retracted first and an impact force is applied at the same time.

Next, the effect will be described.
In the vehicle steering system of the fifth embodiment, in addition to the effects (1) to (4) of the first embodiment, the effects listed below can be obtained.

  (8) A first shaft 5 that connects the rotation direction converting means 4 and the clutch 6 is provided. The first shaft 5 has a joint portion 25 that is disconnected when a load F perpendicular to the axial direction is applied. Therefore, the impact force transmitted to the driver at the time of a vehicle collision can be reduced.

  (9) Since the joint portion 25 has a meshing structure in which the meshing is disengaged when a load F in the direction perpendicular to the axial direction is applied, the joint portion 25 is broken only at the time of collision, and the steering wheel 22 is surely steered in the backup mode. , 22 can be transmitted.

  (10) Since the joint portion 25 is the concave portion 23a on the member 23 side and the convex portion 24a meshing with the concave portion 23a on the member 24 side, a joint portion that breaks at the time of collision can be configured with a simple structure.

First, the configuration will be described.
FIG. 9 is a diagram illustrating the configuration of the first shaft 5 of the sixth embodiment. The first shaft 5 of the sixth embodiment includes joint portions 26 in which small diameter portions 26a and large diameter portions 26b are alternately arranged. And this joint part 26 is set so that the small diameter part 26a may fracture | rupture when the load F of the orthogonal | vertical direction acts with respect to an axial direction.
Note that the operation of the sixth embodiment is the same as that of the fifth embodiment, and a description thereof will be omitted.

Next, the effect will be described.
In the vehicle steering apparatus according to the sixth embodiment, in addition to the effects (1) to (4) of the first embodiment, the following effects can be obtained.
(11) Since the joint portion 26 is bent when a load F in a direction perpendicular to the axial direction is applied, the impact force transmitted to the driver at the time of a vehicle collision can be reduced.

First, the configuration will be described.
FIG. 10 is a diagram illustrating the configuration of the first shaft 5 according to the seventh embodiment. In the seventh embodiment, the first shaft 5 includes two members 27 and 28 in the longitudinal direction, and is perpendicular to the axial direction. When the load F is applied, a joint portion 29 is provided to disconnect the two members 27 and 28 from each other. The joint portion 29 is formed with a cross-shaped release shape 27a on the member 27 side, and a cross-shaped projection shape 28a that meshes with the release shape 27a is formed on the member 28 side. The joint portion 29 has a meshing structure in which the meshing between the release shape 27a and the projection shape 28a is released when a load F perpendicular to the axial direction is applied.
Note that the operation of the seventh embodiment is the same as that of the fifth embodiment, and thus the description thereof is omitted.

Next, the effect will be described.
In the vehicle steering system of the seventh embodiment, the following effects can be obtained in addition to the effects (1) to (4) of the first embodiment and the effect (8) of the fifth embodiment.

  (12) Since the joint portion 29 has the release shape 27a on the member 27 side and the projection shape 28a that meshes with the release shape 27a on the member 28 side, the joint portion can be configured with a simple structure and broken at the time of collision.

First, the configuration will be described.
FIG. 11 is an overall configuration diagram showing a steer-by-wire system to which the vehicle steering apparatus of the eighth embodiment is applied. In the eighth embodiment, in addition to the configuration of the fifth embodiment, the steering unit A is connected to the vehicle body. A protrusion 30 is provided at a position facing the joint portion 25 of the dash panel 9 to contact the joint portion 25 and promote breakage when moved forward of the vehicle.

[Steering part dropout promotion action at the time of collision]
In the eighth embodiment, the steering part A moves to the dash panel 9 side at the time of a vehicle collision, and comes into contact with the protrusion 30 provided on the dash panel 9, thereby reliably breaking the first shaft 5 and dropping the steering part A. Can be made.

Next, the effect will be described.
In the vehicle steering apparatus of the eighth embodiment, the effects listed below are obtained in addition to the effects (1) to (4) of the first embodiment and the effects (8) to (10) of the fifth embodiment.

  (13) Since the protrusion 30 that applies a load in the vertical direction to the joint portion 25 is provided, the breakage of the first shaft 5 is promoted at the time of collision, and the impact on the driver can be reduced.

  (14) Since the projecting portion 30 is disposed on the dash panel 9 of the vehicle at a position facing the joint portion 25, when the steering portion A approaches the dash panel 9 at the time of the vehicle collision, it reliably contacts the first shaft 5. Thus, the first shaft 5 can be broken and the steering portion A can be dropped.

First, the configuration will be described.
FIG. 12 is an overall configuration diagram illustrating a steer-by-wire system to which the vehicle steering device of the ninth embodiment is applied. In the ninth embodiment, the protrusion 31 is provided in the steering portion A with respect to the eighth embodiment. It arrange | positions in the position (casing of the reaction force actuator 3) facing the coupling part 25. FIG.
In addition, about the effect | action of Example 9, since it is the same as that of Example 8, description is abbreviate | omitted.

Next, the effect will be described.
In the vehicle steering apparatus of the ninth embodiment, in addition to the effects (1) to (4) of the first embodiment, the effects (8) to (10) of the fifth embodiment, and the effect (13) of the eighth embodiment, The following effects are obtained.

  (15) Since the projecting portion 31 is disposed at a position facing the joint portion 25 of the steering portion A, when the vehicle collides, the first shaft 5 is reliably contacted to break the first shaft 5 and the steering portion A is dropped. Can be made.

(Other examples)
As mentioned above, although the best form for implementing this invention was demonstrated based on Examples 1-9, the specific structure of this invention is not limited to Examples 1-9, It is the invention. Design changes and the like within a range that does not depart from the gist are also included in the present invention.

  For example, in Embodiments 1 to 9, the bevel gear is used as the rotation direction conversion means, but the rotation direction conversion means is located between the reaction force actuator of the steering unit and the clutch, and is relative to the rotation axis direction of the operation input means. For example, a universal joint may be used.

  Moreover, although Example 8 and 9 showed the example using the joint part 25 of Example 5 as a joint part, you may use the joint parts 26 and 29 of Example 6 or 7. FIG.

1 is an overall configuration diagram illustrating a steer-by-wire system to which a vehicle steering apparatus according to a first embodiment is applied. FIG. 3 is a diagram illustrating a detailed configuration of a steering unit A according to the first embodiment. It is a figure which shows the structure of the bevel gear used as the rotation direction conversion means 4 of Example 1. FIG. It is a figure which shows the steering part of the conventional steer-by-wire system. It is a whole block diagram which shows the steer-by-wire system to which the steering apparatus for vehicles of Example 2 was applied. It is a whole block diagram which shows the steer-by-wire system to which the steering apparatus for vehicles of Example 3 was applied. It is a whole block diagram which shows the steer-by-wire system to which the steering apparatus for vehicles of Example 4 was applied. It is a figure which shows the structure of the 1st shaft 5 which connects the rotation direction conversion means 4 and clutch 6 of Example 5. FIG. It is a figure which shows the structure of the 1st shaft 5 of Example 6. FIG. FIG. 10 is a diagram showing a configuration of a first shaft 5 of Example 7. It is a whole block diagram which shows the steer-by-wire system to which the steering apparatus for vehicles of Example 8 was applied. It is a whole block diagram which shows the steer-by-wire system to which the steering apparatus for vehicles of Example 9 was applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Handle 2 Column shaft 3 Reaction force actuator 4 Rotation direction conversion means 4a Input shaft 4b Output shaft 4c, 4d Bevel gear 4e Casing 5 1st shaft 6 Clutch 7 2nd shaft 9 Dash panel 9a Communication hole 9b Communication hole 10 Cable type column 10a Handle side cable reel 10b Pinion side cable reels 10c, 10c Outer tube 11 Steering gear 13 Handle angle sensor 14 Torque sensor 15, 16 Resolver 17 Torque sensor 18 Encoder 19 Control controller 20, 20 Steering actuator 21 Pinion shaft 22, 22 Steering ring

Claims (15)

A steering part having an operation input means and a reaction force actuator, and a steering part that steers the steered wheels are mechanically disconnected, and a clutch that mechanically connects the steering part and the steering part, and this clutch In a vehicle steering apparatus comprising backup means provided between the steered portion and transmitting steering torque input by the operation input means to the steered wheels when the clutch is engaged,
A vehicle comprising: a rotation direction conversion unit that outputs a rotation direction of the clutch different from a rotation axis direction of the operation input unit between the reaction force actuator of the steering unit and the clutch. Steering device. The vehicle steering apparatus according to claim 1,
The vehicle steering apparatus according to claim 1, wherein the rotation direction conversion means outputs the rotation axis direction of the clutch at an angle smaller than a substantially right angle with respect to the rotation axis direction of the operation input means. The vehicle steering apparatus according to claim 1 or 2,
The vehicle steering apparatus according to claim 1, wherein the rotation direction conversion means outputs the rotation of the operation input means to the outside in the vehicle width direction. The vehicle steering apparatus according to claim 1 or 2,
The vehicle steering apparatus according to claim 1, wherein the rotation direction conversion means outputs the rotation of the operation input means inward in the vehicle width direction. The vehicle steering apparatus according to any one of claims 1 to 4, wherein:
The vehicle steering apparatus according to claim 1, wherein the rotation direction conversion means outputs the rotation of the operation input means downward. The vehicle steering apparatus according to any one of claims 1 to 5,
The backup means is a cable column,
The vehicle steering apparatus according to claim 1, wherein the clutch transmits the rotation from the rotation direction changing means to the cable column in an engaged state. The vehicle steering apparatus according to any one of claims 1 to 6, wherein:
A shaft for connecting the rotation direction changing means and the clutch;
The vehicle steering apparatus according to claim 1, wherein the shaft includes a joint portion that is disconnected when a load perpendicular to the axial direction is applied. The vehicle steering apparatus according to claim 7, wherein
The vehicle steering apparatus according to claim 1, wherein the joint portion has a meshing structure that disengages when a load in a direction perpendicular to the axial direction is applied. The vehicle steering apparatus according to claim 8, wherein
One of the joint portions is a concave portion, and the other is a convex portion that meshes with the concave portion. The vehicle steering apparatus according to claim 8, wherein
One of the joint portions is a release shape, and the other is a protrusion shape that meshes with the release shape. The vehicle steering apparatus according to claim 7, wherein
The vehicle steering apparatus according to claim 1, wherein the joint portion has a shape that can be bent when a load in a direction perpendicular to the axial direction is applied. The vehicle steering apparatus according to any one of claims 7 to 11,
A vehicular steering apparatus, comprising a protrusion that applies a load in a vertical direction to the joint. The vehicle steering apparatus according to claim 12, wherein
The vehicle steering apparatus according to claim 1, wherein the protrusion is disposed on a dash panel of the vehicle at a position facing the joint. The vehicle steering apparatus according to claim 12, wherein
The vehicular steering apparatus, wherein the protrusion is disposed at a position facing the joint of the steering unit. The vehicle steering apparatus according to any one of claims 1 to 14,
The vehicle steering apparatus according to claim 1, wherein the reaction force actuator is a coaxial motor whose output shaft is provided coaxially with the column shaft.

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