JP2008024076A - Steering device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To regulate the movement of a shaft connected with wheels in the vehicle width direction so that the generation of a shock may be suppressed. <P>SOLUTION: This steering device 2 for steering the wheels provided in a vehicle is provided with a moving regulating mechanism 100 for regulating a rack bar 26 moving in the vehicle width direction of the vehicle to change directions of the wheels according to the rotation of a steering wheel by an operation of a driver to move in a prescribed range or more. The moving regulating mechanism 100 moves in a direction crossing the moving direction of the rack bar 26 according to the movement of the rack bar 26 to press the outer periphery of the rack bar 26. As a result, the movement of the rack bar 26 can be regulated so that the generation of the shock may be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a steering device for steering wheels provided in a vehicle.

  Conventionally, a steering wheel that changes the traveling direction of the vehicle by converting the rotational motion of the steering wheel by the driver's operation into a linear motion by a rack and pinion mechanism, and moving the rack to which the wheels are connected in the vehicle width direction. The device is known. In such a steering device, if the steering wheel continues to rotate in one direction, the wheel whose direction has changed will interfere with the tire house, and therefore it is necessary to regulate the movement of the rack within a predetermined range. In view of this, it has been considered to restrict the amount of movement of the rack in the axial direction by bringing the rack end into contact with the rack housing.

  In this way, the rack end is brought into contact with the rack housing, so that the movement of the rack in the axial direction can be restricted. However, when the rack and the rack housing come into direct contact with each other, the impact constitutes the steering device. It is transmitted to each member that causes the deterioration of the operation feeling of the driver and also causes a decrease in durability of each member.

Therefore, in Patent Document 1, when an elastic body such as rubber is disposed between a ball joint side end surface attached to both ends of the rack and a rack housing side end surface, the rack and the rack housing abut in the axial direction. Discloses an impact mitigation device for mitigating the impact.
JP 2005-88777 A

  However, in the impact mitigation device in Patent Document 1, it is necessary to increase the capacity of the elastic body in order to sufficiently absorb the impact by deforming the elastic body when the rack comes into contact with the rack housing. Will lead to an increase in size. On the other hand, if the capacity of the elastic body is reduced, the impact when the rack comes into contact with the rack housing cannot be sufficiently absorbed, and instantaneously high torque is generated in each component constituting the suspension device. Therefore, the durability of each component member may be reduced.

  In particular, in an electric power steering device that assists the driver's turning force of the steering wheel, if a momentary high torque is generated due to an impact, the motor may generate excessive torque to further assist the steering force. It becomes.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for restricting the movement of the shaft, to which the wheels are connected, in the vehicle width direction so as not to generate much impact. is there.

  In order to solve the above-described problems, a steering device according to an aspect of the present invention is a steering device for steering a wheel provided in a vehicle, and the direction of the wheel is changed according to rotation of the steering wheel by a driver's operation. A shaft that moves in the vehicle width direction of the vehicle in order to change, a housing that houses the shaft, a movement restriction mechanism that is disposed between the shaft and the housing, and restricts movement of the shaft beyond a predetermined range; . The movement restricting mechanism moves in a direction crossing the moving direction of the shaft as the shaft moves, and presses the outer periphery of the shaft.

  According to this aspect, for example, when the driver performs an operation that requires a large steering angle, such as when entering a garage or parking, the shaft moves greatly according to the rotation of the steering wheel. The movement of the shaft beyond a predetermined range can be restricted by the movement restricting mechanism so as not to contact the shaft. At this time, the movement restricting mechanism presses the outer periphery of the shaft from the direction intersecting the moving direction of the shaft as the shaft moves, so that a frictional force is generated between the movement restricting mechanism and the shaft. The movement restricting mechanism restricts the movement of the shaft using this frictional force. Therefore, for example, compared with the case where the movement of the shaft is restricted by causing the shaft to directly contact the fixed buffer member, the impact when the movement starts to be restricted can be reduced with a simple configuration. Further, since the movement restricting mechanism presses the outer periphery of the shaft while being elastically deformed, the generated frictional force is gradually increased and the impact can be absorbed gradually.

  The movement restricting mechanism includes an annular engaging portion that engages with the shaft and moves together with the shaft, and a first inclined surface that is inclined with respect to a moving direction of the shaft, and the inclined surface is formed in the housing. A sliding portion that slides on the inner surface of the shaft, and a pressing portion that is provided inside the sliding portion so as to face the shaft and presses the outer periphery of the shaft. The sliding portion is displaced in a direction intersecting with the moving direction of the shaft by sliding the first inclined surface with the inner surface of the housing in conjunction with the engaging portion, and the pressing portion is The outer periphery of the shaft is pressed while being elastically deformed with the displacement of the sliding portion.

  According to this aspect, the annular engaging portion moves together with the shaft when the shaft is engaged. The sliding portion is displaced in a direction intersecting with the moving direction of the shaft as the first inclined surface formed on the sliding portion slides on the inner surface of the housing in conjunction with the engaging portion. Since the pressing portion is provided inside the sliding portion so as to face the shaft, the outer periphery of the shaft is pressed with the movement of the shaft, that is, with the displacement of the sliding portion. Therefore, for example, when the steering angle of the steering wheel by the driver is close to the neutral state, such as when going straight ahead, the pressing part is separated from the shaft or lightly pressed the shaft, realizing a good steering feeling can do.

  On the other hand, when the steering angle of the steering wheel by the driver is large and the shaft moves largely, the movement of the shaft is restricted by the frictional force generated between the movement restricting mechanism and the shaft, so the shaft is fixed to the fixed buffer member. Compared with the case where the movement of the shaft is regulated by directly contacting the shaft, the impact when the movement starts to be regulated can be reduced. Moreover, since the pressing portion presses the outer periphery of the shaft while being elastically deformed, the generated frictional force gradually increases and the impact can be absorbed gradually.

  Here, as the sliding part, a material having a good sliding property and wear resistance with respect to the housing and a low coefficient of friction is suitable. For example, a low-speed and high-load oil-free bearing based on an alloy such as a high-strength brass alloy, a copper-based sintered layer, or phosphor bronze and embedded with a solid lubricant can be used. Further, as the pressing portion, an elastic member that is elastically deformed such as resin or rubber is suitable. In addition, when the steering angle of the steering wheel is close to a neutral state, the pressing portion may be completely separated from the shaft, but may be only partially separated.

  The engaging portion may be provided with a slit in the radial direction. Thereby, it becomes easy for the annular engaging portion to be deformed in the circumferential direction. For this reason, the movement restricting mechanism can displace the sliding portion in a direction intersecting the moving direction of the shaft with a smaller force. Therefore, an impact generated when a part of the shaft is engaged with the engaging portion. Can be suppressed.

  The inner surface of the housing may be formed with a second inclined surface that guides the first inclined surface formed on the sliding portion. Thereby, compared with the case where the inner surface of the housing is simply processed into a cylindrical shape, the movement restricting mechanism is less inclined because the first inclined surface is guided with respect to the second inclined surface of the housing, It becomes possible to move stably. Accordingly, the sliding portion can be accurately displaced in a direction intersecting the moving direction of the shaft, and the outer periphery of the shaft can be pressed uniformly. And the speed of a shaft can be reduced gradually.

  A positioning member that restricts the position of the movement restricting mechanism when the shaft is not engaged with the movement restricting mechanism; and an urging member that urges the movement restricting mechanism toward the positioning member. May be. Thus, even if the movement restriction mechanism moves to restrict the movement of the shaft, for example, the driver returns the steering wheel to a state close to neutral, and the shaft engages with the movement restriction mechanism. When they are not aligned, they are returned to a predetermined position by the urging member. Therefore, the movement restricting mechanism can stably restrict the movement of the shaft so as not to generate much impact over a long period of time.

  ADVANTAGE OF THE INVENTION According to this invention, the movement to the vehicle width direction of the shaft with which the wheel was connected can be controlled so that an impact may not arise so much.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate.

(First embodiment)
[Steering device]
FIG. 1 is a schematic configuration diagram of a steering device 2 according to a first embodiment of the present invention. The steering device 2 according to the present embodiment steers the wheels provided in the vehicle, and can be configured as a so-called column assist type electric power steering. However, the steering device may be configured as a so-called hydraulic power steering.

  The steering device 2 includes a steering wheel 4, a steering shaft 6, a steering column 8, an intermediate shaft 10, universal joints 12 and 14, a steering gear box 16, wheels (not shown), and the like. The steering device 2 is steered when the steering wheel 4 is rotated by the driver. The steering wheel 4 includes an annular rim, a hub inserted into the steering shaft 6, and spokes connecting the rim and the hub, and is rotated by a driver to steer the vehicle.

  The steering shaft 6 has a role of fixing the steering wheel 4 with a nut on the upper end side and transmitting the rotational force of the steering wheel 4, and is configured such that the steering wheel 4 and the steering shaft 6 rotate simultaneously. The lower end side of the steering shaft 6 is connected to a universal joint 12 for transmitting the rotation of the steering shaft 6 to the intermediate shaft 10.

  The steering column 8 rotatably supports the steering shaft 6 via a bearing (not shown). The steering column 8 according to the present embodiment includes a motor 18, a speed reducer (not shown), and a torque sensor 20, and can generate an assist torque during steering to reduce the steering operation force. The intermediate shaft 10 is connected to a universal joint 14 for transmitting the rotation to the steering gear box 16.

  The steering gear box 16 converts the rotation of the steering wheel 4 into a linear motion in the vehicle width direction of the vehicle. Specifically, the steering gear box 16 includes a pinion gear 24 fixed to the tip of a pinion shaft 22 connected via the universal joint 14, and a rack bar 26 that meshes with the pinion gear 24. The rack bar 26 is slidably accommodated in a rack tube 28 as a housing extending in the vehicle width direction in order to accommodate the rack bar 26. The both ends of the rack bar 26 are connected to the tie rod 32 via the ball joint 30.

  At both ends of the rack tube 28, a boot 34 that covers a part of the ball joint 30 and the tie rod 32 is attached. The left and right tie rods 32 are respectively connected to left and right knuckle arms (not shown). Since the knuckle body on which the knuckle arm is formed supports the wheel, the tie rod 32 is interlocked by the movement of the rack bar 26 in the vehicle width direction, and the direction of the wheel can be changed via the knuckle. That is, in the steering device 2 according to the present embodiment, the shaft that moves in the vehicle width direction of the vehicle in order to change the direction of the wheels according to the rotation of the steering wheel 4 by the operation of the driver is the rack bar 26 and The ball joint 30 is connected to both ends thereof.

  The steering device 2 includes a movement restriction mechanism 100 that is disposed between the rack bar 26 and the rack tube 28 and restricts the movement of the rack bar 26 within a predetermined range. Hereinafter, the movement restriction mechanism 100 will be described in detail.

[Movement restriction mechanism]
FIG. 2 is a schematic cross-sectional view schematically showing a main part of the steering apparatus including the movement restricting mechanism according to the first embodiment. As shown in FIG. 2, the rack tube 28 is a hollow housing member, and has a plurality of inner peripheral portions having different inner diameters in the vehicle width direction. The inner peripheral portion 28a has the smallest radius, and the rack bar 26 is inserted with a slight gap so that the rack bar 26 can move in the vehicle width direction.

  The inner peripheral portion 28b is formed closer to the boot 34 than the inner peripheral portion 28a so as to have an inner diameter larger than the inner diameter of the inner peripheral portion 28a. In the annular gap between the inner peripheral portion 28b and the rack bar 26, a later-described spring 36, a sliding portion 102 and a pressing portion 104 in the movement restricting mechanism 100 are arranged. Further, a tapered surface 28e is formed on the inner peripheral portion 28b as an inclined surface inclined with respect to the movement direction of the rack bar 26 in order to guide a part of the movement restricting mechanism 100. The tapered surface 28e is formed such that the diameter gradually decreases toward the center portion of the rack tube 28 in the vehicle width direction. The inner peripheral portion 28c is formed closer to the boot 34 than the inner peripheral portion 28b so as to have an inner diameter larger than the inner diameter of the inner peripheral portion 28b. An engaging portion 106 in the movement restricting mechanism 100 described later is disposed in the annular gap between the inner peripheral portion 28 c and the rack bar 26.

  FIG. 3 is a schematic perspective view schematically showing the movement restricting mechanism according to the first embodiment. The movement restricting mechanism 100 includes an annular engaging portion 106 that engages with the end surface 30a of the ball joint 30 that is a part of the shaft, and a sliding portion that protrudes on the opposite side to the side that engages with the end surface 30a. 102 and a pressing portion 104. The engaging portion 106 has a slit 106a formed in a disk-like flange portion. The sliding portion 102 extends in the arrow X direction, which is the moving direction of the rack bar 26, and a tapered surface 102 a is formed as an inclined surface that is inclined with respect to the moving direction of the rack bar 26. The tapered surface 102a is formed so that the diameter gradually decreases as the distance from the engaging portion 106 increases. The pressing portion 104 is integrally provided inside the sliding portion 102 so as to face the rack bar 26.

  The taper surface 102a that mainly slides with the rack tube 28 is made of a high-strength brass alloy in which a solid lubricant is embedded as a material having a good sliding property and wear resistance against the rack tube 28 and a low coefficient of friction. Yes. Further, as the material of the pressing portion 104, elastically deformed resin, rubber, or the like is used. And the movement control mechanism 100 can be integrally manufactured by resin molding combining these materials.

  Next, the movement when the movement restriction mechanism 100 restricts the movement of the rack bar 26 will be described. FIG. 4 is a schematic cross-sectional view schematically showing a state in which the movement of the rack bar 26 is restricted by the movement restriction mechanism according to the first embodiment.

  In the state shown in FIG. 2, the movement restricting mechanism 100 is biased by the spring 36 toward the positioning member 38 fixed to the annular groove 28d formed in the inner peripheral portion 28c. The movement restricting mechanism 100 restricts the position when the steering wheel 4 is not operated or the operation amount is small by engaging the engaging portion 106 with the positioning member 38. The positioning member 38 is an annular C ring with a notch in part. Thereby, workability | operativity at the time of mounting | wearing with the positioning member 38 in the annular groove 28d can be improved.

  When the driver operates the steering wheel 4 in any rotation direction from the state shown in FIG. 2, the rack bar 26 moves in the arrow A direction according to the rotation of the steering wheel 4. When the amount of movement of the rack bar 26 reaches a predetermined value, the end surface 30a of the ball joint 30 constituting the shaft engages with the engaging portion 106 of the movement restricting mechanism 100. Further, when the rack bar 26 moves in the arrow A direction, the engaging portion 106 moves in the arrow B direction against the elastic force of the spring 36 together with the rack bar 26.

  At this time, the sliding portion 102 moves in conjunction with the engaging portion 106 while the tapered surface 102 a slides on the tapered surface 28 e surface of the rack tube 28. Then, the sliding portion 102 is displaced in the direction of arrow C intersecting with the moving direction of the rack bar 26. Therefore, the inner diameter of the through hole formed at the center of the movement restriction mechanism 100 and into which the rack bar 26 is inserted contracts. As a result, the pressing portion 104 presses the outer circumference of the rack bar 26 in the direction of arrow C while elastically deforming the outer periphery of the rack bar 26 as the sliding portion 102 is displaced.

  At this time, a frictional force is generated between the movement restriction mechanism 100 and the rack bar 26. Then, the movement restricting mechanism 100 restricts the movement of the rack bar 26 using this frictional force. Further, as shown in FIG. 4, the engaging portion 106 of the movement restricting mechanism 100 that moves together with the rack bar 26 engages with the step portion between the inner peripheral portion 28 b and the inner peripheral portion 28 c having different diameters. It is possible to completely restrict the movement of the bar 26 beyond a predetermined range.

  In addition, the inner surface of the rack tube 28 according to the present embodiment is formed with a tapered surface 28e that guides the tapered surface 102a formed on the sliding portion 102. Therefore, the movement restricting mechanism 100 is less likely to be inclined because the tapered surface 102a is guided with respect to the tapered surface 28e as compared with the case where the inner peripheral portion 28b of the rack tube 28 is simply processed into a cylindrical shape. Can be moved. Accordingly, the sliding portion 102 can be accurately displaced in a direction intersecting with the moving direction of the rack bar 26, and can uniformly press the outer periphery of the rack bar 26. As a result, the speed of the rack bar 26 can be gradually reduced to restrict movement.

  The positioning member 38 restricts the position of the movement restricting mechanism 100 when the ball joint 30 is not engaged with the movement restricting mechanism 100, and the spring 36 biases the movement restricting mechanism 100 toward the positioning member 38. Therefore, when the ball joint 30 connected to the end of the rack bar 26 is not engaged with the movement restriction mechanism 100, the movement restriction mechanism 100 is returned to a predetermined position by the spring 36. In other words, even when the movement restriction mechanism 100 moves to restrict the movement of the rack bar 26, the movement restriction mechanism 100 returns the steering wheel to a state close to neutral, and the ball joint 30 moves. When not engaged with the mechanism 100, it is returned to a predetermined position by a spring. Therefore, the movement restricting mechanism 100 can stably restrict the movement of the rack bar 26 so as not to generate much impact over a long period of time.

  Next, the relationship between the movement amount of the movement restriction mechanism 100 and the frictional force generated when the outer periphery of the rack bar 26 is pressed will be described. FIG. 5 is a top view of the movement restricting mechanism 100 shown in FIG. 3 as viewed from the side where the sliding portion 102 is provided. FIG. 6A is a graph schematically showing the relationship between the stroke amount H moved after the rack bar 26 abuts against the movement restricting mechanism 100 and the circumferential interference α, and FIG. FIG. 6C schematically shows the relationship between the friction force F acting on the rack bar 26 and the moving speed Vr of the rack bar 26, schematically showing the interference α and the friction force F acting on the rack bar 26. It is the graph shown in. Each graph shown in FIGS. 6A to 6C is schematically shown for explanation, and is not limited to the relationship shown here.

  In the steering device 2 according to the present embodiment, assuming that the diameter of the rack bar 26 is φD and the inner diameter of the engaging portion 106 or the pressing portion 104 is φD + Δd, when the steering wheel 4 is in the neutral state, the engaging portion 106 or An annular gap of ½Δd is formed between the pressing portion 104 and the rack bar 26. In this state, when the driver operates the steering wheel 4 and the amount of movement of the rack bar 26 reaches a predetermined value, the end face 30a of the ball joint 30 connected to the end thereof is engaged with the engaging portion of the movement restricting mechanism 100. 106 abuts. When the rack bar 26 further moves, the inner diameters of the pressing portion 104 and the engaging portion 106 begin to gradually contract due to the tapered surface 102 a formed on the sliding portion 102.

However, since a gap is formed between the pressing portion 104 and the engaging portion 106 and the rack bar 26, the pressing portion 104 remains on the rack bar 26 until the inner diameters of the pressing portion 104 and the engaging portion 106 decrease by Δd. Do not touch the outer periphery of Therefore, as shown in FIG. 6A, the interference allowance α does not increase until the stroke amount becomes H ₀ regardless of the increase in the stroke amount H. Here, the tightening allowance α can be defined as the deformation amount of the slit 106 a after the inner peripheral portion of the engaging portion 106 or the pressing portion 104 contacts the outer peripheral portion of the rack bar 26. In the movement restricting mechanism 100 according to the present embodiment, since the engagement portion 106 is provided with the radial slit 106a, the annular engagement portion 106 can be easily deformed in the circumferential direction. Therefore, the movement restricting mechanism 100 can displace the sliding portion 102 in a direction intersecting the moving direction of the rack bar 26 with a smaller force, so that the ball joint 30 which is a part of the shaft is engaged with the engaging portion. The magnitude of the impact generated when engaged with 106 can be suppressed.

When the stroke amount H exceeds H ₀ , the interference allowance α gradually increases. For this reason, the pressing amount by which the pressing portion 104 presses the rack bar 26 also increases, so that the frictional force F generated between the pressing portion 104 and the rack bar 26 gradually increases as shown in FIG. 6B. . Therefore, as shown in FIG. 6C, the moving speed V _r of the rack bar 26 decreases as the friction force F increases. As described above, the movement restricting mechanism 100 presses the outer periphery of the rack bar 26 from the direction that intersects the moving direction of the rack bar 26 in accordance with the movement of the rack bar 26 from the state where it does not contact the rack bar 26. A frictional force can be gradually generated between the movement restricting mechanism 100 and the rack bar 26. Therefore, the impact when the movement starts to be restricted can be reduced with a simple configuration. Further, since the movement restricting mechanism 100 presses the outer periphery of the shaft while the pressing portion 104 is elastically deformed, the generated frictional force is gradually increased and the impact can be gradually absorbed.

(Second Embodiment)
FIG. 7 is a schematic perspective view schematically showing the movement restricting mechanism according to the second embodiment. In addition, the description which overlaps with the movement control mechanism 100 which concerns on 1st Embodiment is abbreviate | omitted suitably. The movement restricting mechanism 200 according to the second embodiment projects in an annular engagement portion 206 that engages with the end surface 30a of the ball joint 30 that is a part of the shaft, and on the side opposite to the side that engages with the end surface 30a. Provided with a substantially cylindrical sliding portion 202 and a pressing portion 204. A slit 208 is integrally formed in the sliding portion 202, the pressing portion 204, and the engaging portion 206.

  The sliding portion 202 extends in the arrow X direction, which is the moving direction of the rack bar 26, and a tapered surface 202 a is formed as an inclined surface inclined with respect to the moving direction of the rack bar 26. The tapered surface 202a is formed so that the diameter gradually decreases as the distance from the engaging portion 206 increases. The pressing part 204 is integrally provided inside the sliding part 202 so as to face the rack bar 26.

  Therefore, even with the movement restriction mechanism 200 according to the present embodiment, the outer circumference of the rack bar 26 can be pressed from the direction intersecting the movement direction of the rack bar 26 as the rack bar 26 moves. A frictional force can be gradually generated between the rack bar 26 and the rack bar 26. Therefore, the impact when the movement starts to be restricted can be reduced with a simple configuration. Further, since the movement restricting mechanism 200 presses the outer periphery of the shaft while the pressing portion 204 is elastically deformed, the generated frictional force is gradually increased and the impact can be gradually absorbed.

  As described above, the present invention has been described with reference to the above-described embodiments. However, the present invention is not limited to the above-described embodiments, and the configurations of the embodiments are appropriately combined or replaced. Those are also included in the present invention. Various modifications such as design changes can be added to each embodiment based on the knowledge of those skilled in the art, and the embodiments to which such modifications are added are also included in the scope of the present invention. sell.

1 is a schematic configuration diagram of a steering device according to a first embodiment of the present invention. It is a schematic sectional drawing which shows typically the principal part of the steering device containing the movement control mechanism which concerns on 1st Embodiment. It is a schematic perspective view which shows typically the movement control mechanism which concerns on 1st Embodiment. It is a schematic sectional drawing which shows typically the state by which the movement of the rack bar was controlled by the movement control mechanism which concerns on 1st Embodiment. It is the top view which looked at the movement control mechanism shown in FIG. 3 from the side in which the sliding part is provided. FIG. 6A is a graph schematically showing the relationship between the stroke amount moved after the rack bar contacts the movement restricting mechanism and the tightening margin in the circumferential direction, and FIG. 6B shows the tightening allowance and the rack. FIG. 6C is a graph schematically showing the relationship between the friction force acting on the rack bar and the moving speed of the rack bar. It is a schematic perspective view which shows typically the movement control mechanism which concerns on 2nd Embodiment.

Explanation of symbols

  2 Steering device, 4 Steering wheel, 6 Steering shaft, 16 Steering gear box, 26 Rack bar, 28 Rack tube, 28e Tapered surface, 30 Ball joint, 30a End surface, 36 Spring, 38 Positioning member, 100 Movement restriction mechanism, 102 Sliding Moving part, 102a taper surface, 104 pressing part, 106 engaging part, 106a slit.

Claims (5)

A steering device for steering wheels provided in a vehicle,
A shaft that moves in the vehicle width direction of the vehicle to change the direction of the wheels in response to the rotation of the steering wheel by the driver's operation;
A housing that houses the shaft;
A movement restricting mechanism that is disposed between the shaft and the housing and restricts movement of the shaft beyond a predetermined range;
The said movement control mechanism moves to the direction which cross | intersects the moving direction of the said shaft with the movement of the said shaft, and presses the outer periphery of a shaft, The steering device characterized by the above-mentioned. The movement restriction mechanism is
An annular engagement portion that engages with the shaft and moves with the shaft;
A first inclined surface that is inclined with respect to the moving direction of the shaft is formed, and the inclined surface slides on the inner surface of the housing;
Provided inside the sliding portion so as to face the shaft, and a pressing portion for pressing the outer periphery of the shaft,
The sliding portion is displaced in a direction crossing the moving direction of the shaft by sliding the first inclined surface with the inner surface of the housing in conjunction with the engaging portion,
The pressing portion presses while elastically deforming the outer periphery of the shaft in accordance with the displacement of the sliding portion.
The steering apparatus according to claim 1.   The steering device according to claim 2, wherein the engaging portion is provided with a slit in a radial direction.   4. The steering device according to claim 2, wherein a second inclined surface that guides a first inclined surface formed on the sliding portion is formed on an inner surface of the housing. 5. A positioning member that regulates the position of the movement restriction mechanism when the shaft is not engaged with the movement restriction mechanism;
A biasing member that biases the movement restricting mechanism toward the positioning member;
The steering apparatus according to any one of claims 1 to 4, further comprising:

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