Steering device

Abstract

To mitigate restraining force due to installation error of a rail.SOLUTION: A steering device 100 of a first aspect includes: a movable member 130 supporting a steering shaft body 110 such that the steering shaft body is rotatable; and a guide mechanism including a pair of rails by which the movable member 130 is guided in a guide direction. The first rail 141 includes a first fixed portion 143 fixed to a vehicle stationary part of a vehicle in the guide direction. The second rail 142 includes a second fixed portion 144 fixed to the movable member 130 in the guide direction. The first fixed portion 143 exists only in a rear overlapping region 104 in which the first rail 141 and the second rail 142 overlap each other in a state where the movable member 130 is arranged at a rear position.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a steering device capable of moving an operating member such as a steering wheel operated by a driver to steer a vehicle. [Background technology]

[0002] Conventionally, there are steering devices that automatically change the position of an operating member depending on the driver, and steering devices that can move an operating member to the front of the vehicle during automatic driving and to a position at the rear of the vehicle where the operating member can be operated by the driver during manual driving.

[0003] For example, Patent Document 1 describes a retractable steering device that can maintain structural strength even when the operating member is moved forward of the vehicle by arranging two ball slide rails on two orthogonal planes. It also describes a mechanism that allows smooth guidance without requiring high precision when installing the two slide rails, thereby ensuring high structural strength, by making one of the two slide rails a rail that allows for misalignment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2023 / 119365 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the technology of Patent Document 1, one of the rails must be a special rail in order to absorb misalignment when the two slide rails are attached, and the rail structure cannot be freely selected.

[0006] The present invention has been made in view of the above-mentioned problems, and provides a steering device that can improve the degree of freedom in selecting a slide rail. [Means for solving the problem]

[0007] One steering device of the present invention is a steering device for steering a vehicle, and comprises: a steering shaft to which an operating member is attached; a movable member that rotatably supports the steering shaft; and a guide mechanism having a pair of rails that guide the movable member along a predetermined guide direction between a predetermined rear position within the vehicle and a predetermined forward position that is forward of the rear position, wherein a first rail, which is one of the pair of rails, has a first fixed portion that is fixed to a vehicle fixed portion of the vehicle at least in the guide direction, and a second rail, which is the other of the pair of rails, has a second fixed portion that is fixed to the movable member at least in the guide direction, and at least one of the first fixed portion and the second fixed portion exists only within a rear overlap region where the first rail and the second rail overlap, or within a nearby region that includes the rear overlap region and the outer periphery of the rear overlap region, when the movable member is positioned at the rear position. [Effects of the Invention]

[0008] According to the present invention, by limiting the fixing of the rail to a specified location, structural strength at the specified location is ensured, and the restraining force of the rail when the movable member moves can be alleviated even if there is an installation error in the rail. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram showing an outline of the configuration of a steering system. [Figure 2] FIG. 2 is a perspective view showing the appearance of the steering device in a state where the operating member is moved to a rear position. [Figure 3] 10 is a perspective view showing the first guide mechanism and the second guide mechanism with the fixed member in a see-through state with the operating member moved to a rear position; FIG. [Figure 4] 10 is a perspective view showing the first guide mechanism and the second guide mechanism with the fixed member, the first rail, and the third rail in a transparent state when the operating member is moved to a rear position. FIG. [Figure 5] FIG. 4 is a cross-sectional view showing a first fixing portion. [Figure 6] 10 is an exploded perspective view showing a first guide mechanism and a second guide mechanism in a state where the operating member has been moved to a rear position. FIG. [Figure 7] FIG. 4 is a cross-sectional view of the first guide mechanism taken along the rolling element portion. [Figure 8] FIG. 10 is a perspective view showing a state in which the movable member is disposed at a front position. [Figure 9] FIG. 10 is a perspective view showing another example of the first fixing portion. [Figure 10] FIG. 10 is a cross-sectional view showing a first fixing portion on which a buffer material is arranged. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of a steering device according to the present invention will be described with reference to the drawings. Note that the following embodiment is an example for explaining the present invention and is not intended to limit the present invention. For example, the shapes, structures, materials, components, relative positional relationships, connection states, numerical values, mathematical formulas, the content of each step in a method, and the order of each step shown in the following embodiment are examples and may include content not described below. Furthermore, while geometric expressions such as parallel and orthogonal may be used, these expressions do not indicate mathematical precision and include substantially allowable errors, deviations, etc. Furthermore, expressions such as simultaneous and identical also include substantially allowable ranges.

[0011] The drawings are schematic diagrams in which emphasis, omission, or adjustment of proportions is appropriately made for the purpose of explaining the present invention, and differ from the actual shapes, positional relationships, and proportions. The X-axis, Y-axis, and Z-axis shown in the drawings represent Cartesian coordinates arbitrarily set for the purpose of explaining the drawings. In other words, the Z-axis is not necessarily an axis along the vertical direction, and the X-axis and Y-axis are not necessarily located within a horizontal plane.

[0012] In addition, in the following, multiple inventions may be collectively described as one embodiment, and some of the contents described below may be described as optional components related to the present invention.

[0013] 1 is a schematic diagram showing an outline of the configuration of a steering system 200. The steering system 200 according to this embodiment is a device mounted on a vehicle such as a passenger car, bus, truck, construction machine, or agricultural machine that can switch between a manual driving mode and an automatic driving mode.

[0014] The type of steering system 200 including the steering device 100 is not limited. In the present embodiment, as shown in Fig. 1, the steering system 200 includes the steering device 100 to which an operating member 210 operated by a driver is attached, and a steering mechanism unit 230 that steers steered wheels 220. In a manual driving mode, for example, the steering system 200 is a system that reads the rotation angle of the operating member 210 using a sensor or the like, and steers the steered wheels 220 by causing a rack shaft 231 to reciprocate left and right based on a signal from the sensor or the like. Such a system is called, for example, a steer-by-wire (SBW) system.

[0015] In steering mechanism 230, movement of rack shaft 231 in the width direction of the vehicle (left and right direction in FIG. 1 ) causes steerable wheels 220 connected to rack shaft 231 via tie rod 232 to turn. Specifically, in manual driving mode, steering actuator 233 operates based on a signal indicating the rotation angle of operating member 210, etc., transmitted from steering device 100. This causes rack shaft 231 to move in the width direction of the vehicle, and steers steerable wheels 220. In other words, steerable wheels 220 are turned in accordance with the operation of operating member 210. In autonomous driving mode, steering actuator 233 operates based on a signal, etc., transmitted from an ECU (Electronic Control Unit) for autonomous driving provided in the vehicle, and thereby steers steerable wheels 220 regardless of the operation of operating member 210. 1 illustrates a configuration in which the driving force of steering actuator 233 is transmitted to rack shaft 231 using a belt, but there are no particular limitations on the method of transmitting the driving force of steering actuator 233 to rack shaft 231. For example, the driving force of steering actuator 233 may be transmitted to rack shaft 231 via a pinion gear fixed to the rotation shaft of steering actuator 233.

[0016] FIG. 2 is a perspective view showing the exterior of the steering device 100 with the operating member 210 moved to a rear position. The steering device 100 is a device for steering a vehicle and is capable of moving the operating member 210 in at least one predetermined axial direction (the Y-axis direction in the figure). In this embodiment, the steering device 100 moves the operating member 210 between a rear position where the driver can operate the operating member 210 for driving and a forward position at the front of the vehicle where the operating member 210 is out of reach of the driver in a driving position. The steering device 100 includes a steering shaft 110, a fixed member 120, a movable member 130, and a first guide mechanism 140, which is one of the guide mechanisms. In this embodiment, the steering device 100 includes a second guide mechanism 160, which is another of the guide mechanisms, and a moving device 125.

[0017] Steering shaft 110 is a rod-shaped member to the tip of which is attached operating member 210, which is operated by the driver to steer the vehicle, and is rotatably supported by movable member 130. In the present embodiment, a reaction force generator (not shown), a rotation angle sensor (not shown), and the like are attached to steering shaft 110, and a reaction force is applied to operating member 210 when the driver operates operating member 210. In addition, the rotation angle sensor outputs a signal for synchronizing the rotation position of operating member 210 with the steering angle of steered wheels 220.

[0018] The fixed member 120 is a member that is fixedly attached to a reinforcement, which is one of the structural members of the vehicle body. The manner in which the fixed member 120 is attached to the vehicle body is not limited. In the present embodiment, the fixed member 120 is attached in a suspended state to a reinforcement that is stretched across the width direction of the vehicle body. The cross-sectional shape of the fixed member 120 perpendicular to the movement direction (Y-axis direction in the figure) of the movable member 130 relative to the fixed member 120 is an L-shape rotated 90 degrees to the right, and includes a plate-like fixed top panel portion 121 and a fixed wall portion 122 that extends downward on one side (X-side in the figure) of the fixed top panel portion 121 in the width direction (X-axis direction in the figure).

[0019] A moving device 125 for moving the movable member 130 is attached below the fixed member 120 (on the Z-side in the drawing). The type of moving device 125 is not particularly limited. In the present embodiment, the moving device 125 includes a feed screw 127 rotatably attached to the fixed member 120 via a fixed bracket 126 so as to extend in the movement direction of the movable member 130 (the Y-axis direction in the drawing), a movable nut 138 that meshes with the feed screw 127 and reciprocates in the movement direction of the movable member 130 as the feed screw 127 rotates, and a rotation drive device 128 that includes a motor (not shown) that rotates the feed screw 127.

[0020] Movable member 130 is a member that rotatably supports steering shaft 110 and is a member that moves in a movement direction (Y-axis direction in the figure) connecting a rear position and a front position relative to fixed member 120 by a guide mechanism. Steering shaft 110 that holds operating member 210 is rotatably attached to movable member 130. In the case of this embodiment, the cross-sectional shape perpendicular to the movement direction of movable member 130 is an L-shape similar to that of fixed member 120 rotated 90 degrees to the right, and includes plate-shaped movable top plate portion 131 and movable wall portion 132 that extends downward on one side (X-side in the figure) of movable top plate portion 131 in the width direction (X-axis direction in the figure).

[0021] FIG. 3 is a perspective view showing the first guide mechanism 140 and the second guide mechanism 160 with the fixed member 120 in a see-through state when the operating member 210 has been moved to the rear position. FIG. 4 is a perspective view showing the first guide mechanism 140 and the second guide mechanism 160 with the fixed member 120, the first rail, and the third rail 161 in a see-through state when the operating member 210 has been moved to the rear position. The guide mechanism including the first guide mechanism 140 and the second guide mechanism 160 includes a pair of rails that guide the movable member 130 along a predetermined guide direction (the Y-axis direction in the figure) between a predetermined rear position and a predetermined front position within the vehicle. The guide direction of the guide mechanism coincides with the movement direction of the movable member 130 relative to the fixed member 120. In this embodiment, the first guide mechanism 140 includes a first rail 141 and a second rail 142. The second guide mechanism 160 includes a third rail 161 and a fourth rail 162.

[0022] First rail 141 is a member that is fixed at least in the guide direction to fixed member 120 that functions as a vehicle fixing portion. Being fixed at least in the guide direction means that first rail 141 does not move in the guide direction relative to fixed member 120, but movement in directions other than the guide direction is permitted.

[0023] 5 is a cross-sectional view showing the first fixed portion 143. When the movable member 130 is disposed in the rear position, the first fixed portion 143 exists only in the rear overlapping region 104 where the first rail 141 and the second rail 142 overlap, or in a nearby region including the rear overlapping region 104 and the outer periphery of the rear overlapping region 104. Here, the outer periphery is within a range of an area extending in the guide direction from the boundary of the rear overlapping region a distance of about half the short side of the rectangle inscribed by the rear overlapping region 104, for example.

[0024] In this embodiment, first rail 141 is fixed to fixing member 120 only at first fixing portion 143. Specifically, first rail 141 has through hole 145, and fixing member 120 and first rail 141 are fixed by first fastening member 146 inserted through through hole 145. First fixing portion 143 is rotatably fixed around first fastening member 146, which forms a rotation axis that intersects the guide direction and extends in a direction (Z-axis direction in the figure) that intersects the width direction (X-axis direction in the figure), which is the arrangement direction of first guide mechanism 140 and second guide mechanism 160. In this embodiment, washer-shaped low-friction members 147 are disposed between fixing member 120 and first rail 141 and between first fastening member 146 and first rail 141. Furthermore, inside through hole 145, a collar 153 made of a low-friction material is disposed between first fastening member 146 and first rail 141. In areas other than the rear overlapping region 104 (including the rear overlapping region 104 in the present embodiment), a gap is provided by low-friction members 147 between the first rail 141 and the fixed member 120, which is the part that is fixed to the vehicle. The low-friction members 147 allow the first rail 141 to rotate smoothly with the first fastening member 146 as an axis relative to the fixed member 120. The first fixed portion 143 is present only in the rear overlapping region 104, where the first rail 141 and the second rail 142 overlap, when the movable member 130 is disposed in the rear position.

[0025] The second rail 142 includes a second fixing portion 144 that is fixed to the movable member 130 at least in the guide direction. The second fixing portion 144 is present only in the rear overlapping region 104 or a region adjacent thereto when the movable member 130 is disposed at the rear position. In the present embodiment, the second fixing portion 144 is present only in the rear overlapping region 104. The second rail 142 is fixed so as not to rotate at the second fixing portion 144. Specifically, when the movable member 130 is disposed at the rear position, the second rail 142 is fixed to the movable member 130 by a plurality of second fastening members 148 (see FIG. 4) that are present only in the rear overlapping region 104.

[0026] Second guide mechanism 160 includes a third rail 161 and a fourth rail 162 attached to be slidable in the guide direction relative to third rail 161. In the present embodiment, third rail 161 is fixed to fixed member 120 over the entire length in the extension direction by a plurality of third fastening members 168 (see FIG. 3). Fourth rail 162 is fixed to movable member 130 over the entire length in the extension direction by a plurality of fourth fastening members 169 (see FIG. 3).

[0027] Fig. 6 is an exploded perspective view of the first guide mechanism 140 and the second guide mechanism 160 when the operating member 210 is moved to the rear position. Fig. 7 is a cross-sectional view of the first guide mechanism 140 taken at the portion of the rolling element 151.

[0028] As shown in FIGS. 6 and 7 , the first guide mechanism 140 includes a first rail 141 and rolling elements 151 arranged between the first rail 141. The rolling elements 151 are aligned in the guide direction to form a rolling element row, and the first guide mechanism 140 includes two rolling element rows. In this embodiment, each of the rolling elements 151 is a metal sphere (bearing ball). The rolling elements 151 constituting each of the two rolling element rows are rotatably held by a single retainer 152. When the operating member 210 is moved to the rear position, the rolling elements 151 and the retainer 152 are located within the rear overlap region 104. The first guide mechanism 140 is a so-called angular-type slide rail in which the rolling elements 151 make two-point contact with the first rail 141, each with a predetermined contact angle, and make two-point contact with the second rail 142, each with a predetermined contact angle. The first guide mechanism 140 has little misalignment between the first rail 141 and the second rail 142 in the alignment direction of the first rail 141 and the second rail 142 (X-axis direction in the figure), which is perpendicular to the guide direction, and in the width direction (Z-axis direction in the figure), which is perpendicular to the guide direction and the alignment direction.

[0029] In this embodiment, the second guide mechanism 160 is of the same type and size as the first guide mechanism 140 .

[0030] FIG. 8 is a perspective view showing the movable member 130 in a state where it is positioned at the forward position. When the movable member 130 is positioned at the forward position to the rear position, the fourth rail 162 slides relative to the third rail 161 without misalignment in any direction other than the guide direction. The first rail 141 of the first guide mechanism 140 is fixed to the fixed member 120 at the first fixing portion 143 by only one first fastening member 146 and is rotatable around the first fastening member 146. The second rail 142 is fixed to the movable member 130 at the second fixing portion 144 by multiple second fastening members 148, but is not fixed to the movable member 130 at any portion other than the second fixing portion 144. Therefore, when the movable member 130 is positioned at the forward position to the position immediately before the rear position, the rotation of the first rail 141 allows the fourth rail 162 to slide relative to the first rail 141 while reducing the restraining force between the first guide mechanism 140 and the second guide mechanism 160. Furthermore, because portions of second rail 142 other than first fixed portion 143 can bend relative to movable member 130, the bending can also reduce the binding force between first guide mechanism 140 and second guide mechanism 160. Even if bending occurs in second rail 142, first rail 141 can rotate, so the bending can be tolerated.

[0031] The present invention is not limited to the above-described embodiments. For example, the present invention may be embodied in another embodiment by arbitrarily combining the components described in this specification or by excluding some of the components. Furthermore, the present invention also includes various modifications that would occur to a person skilled in the art without departing from the spirit of the present invention, i.e., the meaning of the wording of the claims.

[0032] For example, second fixing portion 144 may be arranged on first rail 141, and first fixing portion 143 may be arranged on second rail 142.

[0033] Furthermore, first fixing portion 143 may be disposed on either first rail 141 or second rail 142.

[0034] Furthermore, as shown in FIG. 9, the first fixing portion 143 may have, for example, one or more elongated holes 154, allowing movement of the first rail 141 or the second rail 142 in the width direction (a direction intersecting the guide direction).

[0035] 10, in a portion other than the rear overlap region 104, buffer material 158 may be disposed instead of a gap between the first rail 141 and the fixed member 120 and / or between the second rail 142 and the movable member 130. By filling the gap with buffer material 158, at least one of the first rail 141 and the second rail 142 can suppress distortion of the rail that may occur due to the gap, thereby ensuring the structural stability of the guide mechanism.

[0036] Furthermore, the steering device 100 has been described as being mounted on a vehicle capable of automatic driving and moving the operating member 210 to the front of the vehicle where the driver cannot operate it during automatic driving, but the steering device 100 may also be mounted on a vehicle that does not have an automatic driving function.

[0037] Furthermore, the rolling element 151 may be a type of rolling element 151 other than a ball bearing. For example, a roller bearing may be adopted as at least one of the rolling element 151 and the rolling element 151. The material forming the rolling element 151 and the rolling element 151 is not limited to metal. For example, the rolling element 151 and at least one of the rolling element 151 may be formed from a resin.

[0038] Furthermore, the guide mechanisms provided in the steering device 100 do not necessarily have to be the second guide mechanism 160 and the first guide mechanism 140 only, but may include three or more guide mechanisms.

[0039] Furthermore, the guide mechanism provided in the steering device 100 may not include the rolling elements 151, and may instead guide the rail by sliding.

[0040] Furthermore, the positional relationship between the first guide mechanism 140 and the second guide mechanism 160 does not have to be an L-shaped arrangement, but may be a parallel arrangement, an opposing arrangement, or the like.

[0041] The movement device 125 may drive the movement of the movable member 130 by a method other than a lead screw method.

[0042] (summary) The steering device 100 of the first embodiment is a steering device 100 for steering a vehicle, and comprises a steering shaft 110 to which an operating member 210 is attached, a movable member 130 that rotatably supports the steering shaft 110, and a guide mechanism having a pair of rails that guide the movable member 130 along a predetermined guide direction between a predetermined rear position within the vehicle and a predetermined forward position that is forward of the rear position, wherein a first rail 141, which is one of the pair of rails, has a first fixed portion 143 that is fixed to a vehicle fixed portion of the vehicle at least in the guide direction, and a second rail 142, which is the other of the pair of rails, has a second fixed portion 144 that is fixed to the movable member 130 at least in the guide direction, and at least one of the first fixed portion 143 and the second fixed portion 144 is present only in a rear overlap region 104 where the first rail 141 and the second rail 142 overlap, or in a nearby region including the rear overlap region 104 and the outer periphery of the rear overlap region 104 when the movable member 130 is positioned at the rear position.

[0043] According to the first aspect, by limiting the fixing of the rail to the rear overlap region 104 or its vicinity, the structural strength of the rear overlap region 104 is ensured, and the restraining force of the rail when the movable member moves can be alleviated even if there is an installation error in the rail.

[0044] The steering device 100 of the second embodiment includes the first embodiment, and at least one of the first fixed portion 143 and the second fixed portion 144 is fixed rotatably around a rotation axis extending in a direction intersecting the guide direction.

[0045] According to the second aspect, even if there is an attachment error in the rail, the rail rotates when the movable member moves, and the restraining force of the rail can be alleviated.

[0046] The steering device 100 of the third embodiment includes the first embodiment, and one of the first fixed portion 143 and the second fixed portion 144 is fixed so as to be rotatable around a rotation axis extending in a direction intersecting the guide direction, and the other is fixed so as not to be rotatable.

[0047] According to the third aspect, it is possible to eliminate the instability of the guide mechanism caused by the pair of rails rotating together, and to achieve both a reduction in the restraining force of the rails and stable guidance of the movable member.

[0048] The steering device 100 of the fourth embodiment includes any of the first to third embodiments, and the guide mechanism includes a plurality of rolling elements 151 held by a retainer 152 so as to form two rows of rolling elements, and the rolling elements 151 constituting the two rows of rolling elements each make two-point contact with the first rail 141 at a predetermined contact angle and two-point contact with the second rail 142 at a predetermined contact angle.

[0049] The movable member 130 can be stably guided by the high restraining force between the pair of rails, and the restraining force due to mounting errors of the rails can be effectively alleviated.

[0050] The fifth embodiment of the steering device 100 includes any of the first to fourth embodiments, and in the portion other than the rear overlap region 104, a gap is provided or a buffer material is placed between the first rail 141 and the vehicle fixed portion, and / or between the second rail 142 and the movable member 130.

[0051] According to the fifth aspect, friction between the rail and the vehicle fixed part can be suppressed, and the restraining force due to rail installation errors can be smoothly alleviated. In addition, the buffer material can prevent the generation of abnormal noise due to contact between the rail and the vehicle fixed part or the movable member 130. [Industrial Applicability]

[0052] The present invention is useful as a steering device 100 that can move an operating member 210, and can be used in vehicles equipped with wheels or tracks, such as passenger cars, buses, trucks, agricultural machinery, and construction machinery. [Explanation of symbols]

[0053] 100...Steering device, 104...Rear overlapping region, 110...Steering shaft body, 120...Fixed member, 121...Fixed top plate portion, 122...Fixed wall portion, 125...Moving device, 126...Fixed bracket, 127...Screw, 128...Rotation drive device, 130...Moving member, 131...Moving top plate portion, 132...Moving wall portion, 138...Moving nut, 140...First guide mechanism, 141...First rail, 142...Second rail, 143...First fixed portion, 144...Second fixed portion, 145...Through hole, 146 ...First fastening member, 147...Low friction member, 148...Second fastening member, 151...Rolling element, 152...Retainer, 153...Collar, 154...Elongated hole, 158...Buffer material, 160...Second guide mechanism, 161...Third rail, 162...Fourth rail, 168...Third fastening member, 169...Fourth fastening member, 200...Steering system, 210...Operating member, 220...Steering wheel, 230...Steering mechanism part, 231...Rack shaft, 232...Tie rod, 233...Steering actuator

Claims

1. A steering device for steering a vehicle, a steering shaft body to which an operating member is attached; a movable member that rotatably supports the steering shaft; a guide mechanism having a pair of rails that guide the movable member along a predetermined guide direction between a predetermined rear position and a predetermined front position in front of the rear position within the vehicle, The first rail, which is one of the pair of rails, a first fixing portion fixed to a vehicle fixing portion of the vehicle at least in the guiding direction; The second rail, which is the other of the pair of rails, a second fixing portion fixed to the movable member at least in the guide direction; At least one of the first fixing portion and the second fixing portion is When the movable member is disposed at the rear position, the first rail and the second rail overlap in a rear overlapping region, or the rear overlapping region and a neighboring region including the outer periphery of the rear overlapping region. Steering device.

2. At least one of the first fixing portion and the second fixing portion is The guide member is fixed so as to be rotatable about a rotation axis extending in a direction intersecting the guide direction. The steering device according to claim 1 .

3. One of the first fixing portion and the second fixing portion is the guide member is fixed rotatably about a rotation axis extending in a direction intersecting the guide direction, On the other hand, Fixed so that it cannot rotate The steering device according to claim 1 .

4. The guide mechanism includes: The bearing comprises a plurality of rolling elements held by a retainer so as to form two rows of rolling elements, The rolling elements constituting the two rolling element rows are Each of them makes contact with the first rail 141 at two points at a predetermined contact angle, and makes contact with the second rail 142 at two points at a predetermined contact angle. The steering device according to claim 1 .

5. In a portion other than the rear overlap region, a gap is provided or a buffer material is arranged between at least one of the first rail and the vehicle fixing portion and the second rail and the movable member. The steering device according to claim 1 .

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