Vehicle height adjustment device

Abstract

To provide a vehicle height adjustment device which can reduce a load applied on an actuator by making a direction of a load applied on a rotation mechanism actuated in the vehicle height adjustment intersect a driving direction of the actuator, and reduce the size of the actuator.SOLUTION: A vehicle height adjustment device comprises: a torsion bar which is connected with a lower arm supporting a tire and is attached to a vehicle; a rotation mechanism which applies rotational force to the torsion bar; and an actuator which actuates the rotation mechanism. The rotation mechanism comprises: a lever whose one end is attached to the torsion bar; and a wedge-shaped member which rotates the lever around the axis of the torsion bar. The actuator moves the wedge-shaped member in a prescribed direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle height adjusting device for use in an automobile or the like. [Background technology]

[0002] Conventionally, a structure in which a mechanism that enables vehicle height adjustment is incorporated into a suspension has been known as a vehicle height adjustment device used in automobiles, etc. For example, as described in Patent Document 1, in a vehicle height adjustment device incorporated into a suspension consisting of a shock absorber and a coil spring, a short cylinder is inserted into the piston rod of the shock absorber, and a spring receiving member that receives the upper end surface of the coil spring is screwed into the short cylinder, and the vehicle height is adjusted by screwing the position of the spring receiving member up and down.

[0003] According to such a vehicle height adjusting device, the height of the vehicle body can be adjusted easily and accurately by changing the height of the spring receiving member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-82525 Summary of the Invention [Problem to be solved by the invention]

[0005] In addition to the height adjustment device described above, which manually sets the vehicle height to a predetermined height, various other methods are known for changing the vehicle height of an automobile, such as a suspension that allows the driver to automatically change the vehicle height while remaining in the vehicle. In particular, in public transportation such as buses that are used by a variety of people, there is a demand for the ability to lower the vehicle height or tilt the vehicle body each time the vehicle stops in order to bring the steps used for getting on and off closer to the road surface for comfortable use.

[0006] When automating vehicle height adjustment using a vehicle height adjustment device such as that described in Patent Document 1, one possible method is to use an actuator or the like to move the spring receiving member vertically. However, when automating vehicle height adjustment using such a conventional vehicle height adjustment device, the actuator's drive direction and the load applied to the spring receiving member are the same, which results in a large load on the actuator and makes it difficult to miniaturize the actuator. Furthermore, even when the vehicle height adjustment device is stopped, the vehicle weight is always applied in the actuator's drive direction, which requires a locking mechanism or the like to maintain the appropriate vehicle height.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide a vehicle height adjustment device that reduces the load on the actuator by intersecting the load direction on the rotation mechanism that is activated when adjusting the vehicle height with the drive direction of the actuator, making it possible to reduce the size of the actuator and not require a locking mechanism. [Means for solving the problem]

[0008] A vehicle height adjustment device that solves the above problem comprises a torsion bar that is attached to the vehicle and connects to a lower arm that supports the tire, a rotation mechanism that applies a rotational force to the torsion bar, and an actuator that operates the rotation mechanism, wherein the rotation mechanism comprises a lever that has one end attached to the torsion bar and a wedge-shaped member that rotates the lever around the axis of the torsion bar, and the actuator moves the wedge-shaped member in a predetermined direction. [Effects of the Invention]

[0009] According to the vehicle height adjustment device of the present invention, the load acting on the wedge-shaped member when adjusting the vehicle height intersects with the driving direction of the actuator that moves the wedge-shaped member, thereby reducing the load in the driving direction of the actuator and enabling the actuator to be made smaller. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a low-down mode of a vehicle height control device according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of a rotation mechanism of a vehicle height adjusting device according to an embodiment of the present invention; [Figure 3] 1 is a cross-sectional perspective view showing an example of a rolling member of a vehicle height adjusting device according to an embodiment of the present invention; [Figure 4] 1 is a perspective view showing a wedge-shaped member of a vehicle height adjusting device according to an embodiment of the present invention; [Figure 5] 1 is a perspective view showing a roller and a receiving surface of a vehicle height adjusting device according to an embodiment of the present invention; [Figure 6] 1 is a cross-sectional perspective view showing an internal structure of a ball screw of a vehicle height adjusting device according to an embodiment of the present invention; [Figure 7] 7A and 7B are plan views of a rotation mechanism of a vehicle height adjusting device according to an embodiment of the present invention, in which FIG. 7A is in a low-down mode and FIG. 7B is in a lift-up mode. [Figure 8] 8A and 8B are front views of a rotation mechanism of a vehicle height adjusting device according to an embodiment of the present invention, in which FIG. 8A is in a low-down mode and FIG. 8B is in a lift-up mode. [Figure 9] 9A and 9B are front views of a vehicle height adjusting device according to an embodiment of the present invention, in which FIG. 9A is in a low-down mode and FIG. 9B is in a lift-up mode. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of a vehicle height control device according to the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the invention according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0012] FIG. 1 is a perspective view showing the low-down mode of a vehicle height control device according to an embodiment of the present invention; FIG. 2 is a perspective view of a rotation mechanism of a vehicle height control device according to an embodiment of the present invention; FIG. 3 is a cross-sectional perspective view showing an example of a rolling member of a vehicle height control device according to an embodiment of the present invention; FIG. 4 is a perspective view showing a wedge-shaped member of a vehicle height control device according to an embodiment of the present invention; FIG. 5 is a perspective view showing a roller and a receiving surface of a vehicle height control device according to an embodiment of the present invention; and FIG. 6 is a cross-sectional perspective view showing the internal structure of a ball screw of a vehicle height control device according to an embodiment of the present invention. In this specification, the "mounted state" is defined as a state in which the components in FIG. 1 are mounted on the vehicle body. In this specification, the "vehicle width direction" and the "vertical direction" are defined as the directions indicated by the respective arrows in FIG. 1.

[0013] 1, a vehicle height control device 1 according to this embodiment moves tires 2 of an automobile or the like up and down to switch between a low-down mode in which the vehicle body is lowered and a lift-up mode in which the vehicle body is raised. The vehicle height control device 1 according to this embodiment is preferably attached to the tires 2 on the front, rear, left, and right sides of the vehicle.

[0014] As shown in FIG. 1, the vehicle height adjustment device 1 includes a lower arm 3 that supports a tire 2, a torsion bar 4 that is attached to the vehicle and connects the lower arm 3, a rotation mechanism 5 that applies a rotational force to the torsion bar 4, and an actuator 6 that operates the rotation mechanism 5.

[0015] The lower arm 3 is a member that supports the tire 2, and as shown in Fig. 1, one end 3a is attached to the axle side of the tire 2, and the other ends 3b, 3c are attached to a torsion bar 4 with a gap between them. An axle support member such as a knuckle is attached to the axle of the tire 2, and the one end 3a of the lower arm 3 is attached to the axle support member. Preferably, the one end 3a and the axle support member are connected via a ball joint or the like.

[0016] At least one end of the torsion bar 4 is attached to the vehicle body, connecting the vehicle body and the lower arm 3. The connection between the torsion bar 4 and the lower arm 3 is firmly fixed so that the torsion bar 4 and the lower arm 3 can rotate together when a rotational force is applied to the torsion bar 4. In addition, one end 11 of a lever 10 (described later) is attached to the torsion bar 4, and similarly to the lower arm 3, the lever 10 and the torsion bar 4 are firmly fixed so that when a rotational force is applied from the lever 10 to the torsion bar 4, the lever 10 and the torsion bar 4 can rotate together.

[0017] As shown in Figure 2, the rotation mechanism 5 includes a lever 10 having one end 11 fixed to the torsion bar 4, a rolling member 20 that can swing relative to the lever 10 and can move up and down relative to the lever 10, and a wedge-shaped member 30 having a track surface 31 against which the rolling member 20 abuts so as to be able to roll.

[0018] As shown in Fig. 2, in the attached state, the lever 10 is a generally L-shaped member having a longitudinal portion extending in the up-down direction and a transversely inward portion extending from the upper end of the longitudinal portion toward the inside in the vehicle width direction. One end 11 of the lever 10 is located at the lower end of the longitudinal portion, and as described above, the torsion bar 4 is attached to it. The other end 12 of the lever 10 is located at the inner end of the transversely inward portion of the transverse portion, and the spherical bearing 13, which will be described later, is attached to it. In addition, it is preferable that the longitudinal portion of the lever 10 be provided with a relief portion 14 to avoid interference with the rolling member 20.

[0019] Spherical bearing 13 is a sliding bearing in which an outer ring and an inner ring make spherical contact, and is attached to the other end 12 of lever 10 so that the outer ring of spherical bearing 13 has an axis in the vertical direction when attached. In this case, the axial direction of the outer ring of spherical bearing 13 is approximately perpendicular to the axial direction of torsion bar 4 fixed to one end 11. The inner ring of spherical bearing 13 has a polygonal shaft shape that corresponds to the cross-sectional shape of sliding spline 22 of rolling member 20, which will be described later, and supports rolling member 20 so that it can swing and move up and down relative to lever 10.

[0020] As shown in FIG. 3, the rolling member 20 has at least two rolling portions 21, and a sliding spline 22 is disposed between the rolling portions 21.

[0021] In an attached state, the rolling part 21 has spherical rolling surfaces 21a located at the upper and lower corners and cylindrical rolling surfaces 21b located on the side surfaces. The rolling part 21 is rotatably attached around the axis of the sliding spline 22, and a plurality of balls 23 and a ball receiving member 24 are disposed between the rolling part 21 and the sliding spline 22 to reduce friction during rotation. The ball guide surface 21c of the rolling part 21 and the ball guide surface 24a of the ball receiving member 24, with which the balls 23 come into contact, are formed into arc-shaped cross sections with a radius of curvature larger than the radius of the balls 23. The combination of the rolling part 21 and the ball receiving member 24 forms a passage for the balls 23. With this ball passage, the balls 23 come into contact with the ball guide surfaces 21c and 24a in a direction perpendicular to the axis of the rolling part 21 and in a direction angled relative to the perpendicular direction, allowing the rolling part 21 to simultaneously support radial and axial loads. 3, the rolling member 20 may be configured such that the shaft portion 25 extending from the center of the upper rolling portion 21 passes through the sliding spline 22 and the ball receiving member 24 with the balls 23 inserted in the ball passage, and the internal components are held by the lower rolling portion 21. Preferably, the ball passage has a guide groove formed therein to guide a cage that holds the plurality of balls 23.

[0022] As shown in Figure 2, the sliding spline 22 is a columnar member with a polygonal cross section, and has a height dimension that does not hinder the up and down movement of the other end 12 associated with the rotation of the lever 10, which will be described later. As described above, the cross-sectional shape of the sliding spline 22 and the axial shape of the inner ring of the spherical bearing 13 are polygonal, so that the spherical bearing 13 is attached to the sliding spline 22 so that it can slide axially without rotating about its axis. It is preferable that the side surfaces of the sliding spline 22 and the side surfaces of the inner ring of the spherical bearing 13 are finished to be smooth flat surfaces with minimal surface irregularities so that the spherical bearing 13 can slide smoothly.

[0023] In this embodiment, as shown in FIG. 2, the wedge-shaped member 30 has a raceway surface 31 that serves as the surface on which the rolling member 20 rolls. As shown in FIG. 4, the raceway surface 31 has a first flat surface 31a that abuts against the cylindrical rolling surface 21b of the rolling portion 21, a second flat surface 31b, an inclined surface 31c, and a curved surface connecting these surfaces. In an attached state, the first flat surface 31a and the second flat surface 31b are planes that are parallel to the axial direction of a screw shaft 51 of the ball screw 50 (described later). The first flat surface 31a is parallel to the second flat surface 31b and, in an attached state, is positioned so as to be inward in the vehicle width direction relative to the second flat surface 31b. The first flat surface 31a and the second flat surface 31b are connected via the inclined surface 31c, and each connecting portion is smoothly connected by a curved surface. Therefore, the inclined surface 31c is inclined from the second flat surface 31b located on the outer side in the vehicle width direction toward the first flat surface 31a located on the inner side in the vehicle width direction. Therefore, the cross-sectional shape of the wedge-shaped member 30 in a plan view is generally wedge-shaped, consisting of the inclined surface 31c and the side surface of the wedge-shaped member 30 on the inner side in the vehicle width direction. Furthermore, it is preferable that each surface of the raceway surface 31 is finished to a smooth surface with few irregularities so that the rolling parts 21 can roll smoothly. Note that the shape of the wedge-shaped member 30 is not limited to this embodiment, and may be determined appropriately as long as it has multiple raceway surfaces on which the rolling members 20 can roll, the raceway surfaces are arranged at intervals in the vehicle width direction, and the raceway surfaces are smoothly connected by surfaces, taking into account the vehicle height adjustment amount, the installation space for the wedge-shaped member 30, and the like.

[0024] In the mounted state, each surface of the raceway surface 31 is positioned at a height at which it can come into contact with the plurality of cylindrical rolling surfaces 21b of the rolling member 20. As shown in Fig. 4, each surface of the raceway surface 31 may be divided into upper and lower halves, and the raceway surface 31 may be configured to be positioned only at the height at which the cylindrical rolling surfaces 21b come into contact. Furthermore, a recessed relief portion may be formed between the upper and lower raceway surfaces 31 to avoid interference with the other end 12 of the lever 10.

[0025] In the mounted state, the wedge-shaped member 30 in this embodiment has a plurality of spherical pressure-receiving surfaces 34 extending outward in the vehicle width direction from the upper and lower ends of each surface of the track surface 31. The spherical pressure-receiving surfaces 34 have an arcuate cross-sectional shape that corresponds to the spherical rolling surfaces 21a of the rolling parts 21. The shape of the spherical pressure-receiving surfaces 34 is not limited to this embodiment and may be determined as appropriate as long as it is a shape that can restrain the vertical movement of the rolling members 20, as will be described later.

[0026] 2 and 4, with the wedge-shaped member 30 formed as described above, the rolling member 20 is disposed so as to be able to roll on the raceway surface 31 of the wedge-shaped member 30. Furthermore, the spherical rolling surfaces 21a located above and below the rolling member 20 abut against the spherical pressure-receiving surfaces 34 located above and below the raceway surface 31, thereby restricting the vertical movement of the rolling member 20 relative to the wedge-shaped member 30 and allowing the spherical pressure-receiving surfaces 34 to bear the axial load of the rolling member 20. Furthermore, the spherical pressure-receiving surfaces 34 of the wedge-shaped member 30 have an arc-shaped cross-sectional shape that corresponds to the spherical rolling surface 21a of the rolling member 20, so the contact area can be increased and the contact surface pressure can be reduced compared to when a load is applied from the spherical rolling surface 21a to a flat pressure-receiving surface.

[0027] The wedge-shaped member 30 has a plurality of guide surfaces 35 angled with respect to the up-down direction on the side surface that faces inward in the vehicle width direction when attached. In this embodiment, as an example, two guide surfaces 35 that protrude inward in the vehicle width direction are formed so as to intersect at right angles.

[0028] 5, a plurality of receiving surfaces 41 are formed on the side of the vehicle body facing the guide surfaces 35, and a plurality of rollers 42 are rotatably attached to the receiving surfaces 41 at predetermined intervals. The wedge-shaped member 30 is arranged so that the guide surfaces 35 abut against the plurality of rollers 42 and is slidably mounted, and is attached to a nut member 52 of a ball screw 50, which will be described later. Because the guide surfaces 35 and the receiving surfaces 41 are angled relative to the vertical direction, the wedge-shaped member 30 can simultaneously bear loads in the vehicle width direction and in the vertical direction.

[0029] 6, the actuator 6 has a ball screw 50 and a motor 60 that drives the ball screw 50, and moves the wedge-shaped member 30 along the axial direction of a screw shaft 51 of the ball screw 50. In this embodiment, the screw shaft 51 is preferably disposed so as to be parallel to the axial direction of the torsion bar 4, as shown in FIG.

[0030] As shown in Figure 6, the ball screw 50 has a screw shaft 51 as a longitudinally extending shaft member on which a spiral ball rolling groove 53 is formed, a nut member 52 as a moving member on which a load rolling groove 54 corresponding to the ball rolling groove 53 is formed, and an end plate 55 fixed to the nut member 52.

[0031] The nut member 52 is attached to the screw shaft 51 so as to be movable in the axial direction via a plurality of balls 57 that roll between the ball rolling groove 53 and the load rolling groove 54. The wedge-shaped member 30 is attached to the axial end of the nut member 52, and the nut member 52 and the wedge-shaped member 30 move together.

[0032] End plate 55 has grooves corresponding to load rolling grooves 54, and when combined with nut member 52, forms a passage for balls 57 having a substantially semicircular cross section. End plate 55 also has return path 56 formed so as to jump over ball rolling groove 53 of screw shaft 51 by one turn.

[0033] With the ball 57 passage configured in this manner, the ball 57 scooped up from the ball rolling groove 53 of the screw shaft 51 by the end of the return path 56 rolls within the return path 56 and is sent to the ball rolling groove 53 one turn earlier, allowing it to circulate infinitely within the passage. Note that although the method using an end plate that returns the ball 57 by one turn has been described as the infinite circulation method, the infinite circulation method is not limited to the end plate, and various circulation methods can be adopted. For example, an end cap method in which end caps having a structure that scoops the ball 57 from the screw shaft 51 are provided at both ends of the nut member 52, a return pipe method in which a return pipe having a circulation structure is attached to the nut member 52, or a deflector method in which a deflector is used to return the ball 57 a predetermined number of turns may be adopted.

[0034] As shown in FIG. 6 , in this embodiment, the motor 60 is disposed so that the axial direction of the rotation shaft of the motor 60 is parallel to the axial direction of the screw shaft 51 of the ball screw 50. The rotational force of the motor 60 is transmitted by known transmission devices such as multiple gears and belts to rotate the screw shaft 51. The rotating screw shaft 51 moves the balls 57 along the ball rolling grooves 53, and in response to the movement of the balls 57, the nut member 52, which has a circulation passage for the balls 57, the end plate 55, and the wedge-shaped member 30 attached to the nut member 52, move in the axial direction of the screw shaft 51. Note that in this embodiment, the case where the axial direction of the rotation shaft of the motor 60 is parallel to the axial direction of the screw shaft 51 has been described. However, the arrangement of the motor 60 is not limited thereto, and the axial direction of the rotation shaft of the motor 60 may be perpendicular to the axial direction of the screw shaft 51. For example, a bevel gear may be used to transmit the rotational force of the motor 60 to the screw shaft 51, the axial direction of which is perpendicular to the screw shaft 51, thereby rotating the screw shaft 51.

[0035] Next, the operation of the vehicle height control device 1 of this embodiment will be described.

[0036] The vehicle height adjusting device 1 of this embodiment has a low-down mode for lowering the vehicle body and a lift-up mode for raising the vehicle body, and can switch between these modes by driving the actuator 6.

[0037] Figure 7 is a plan view of the rotation mechanism of a vehicle height control device according to an embodiment of the present invention, with Figure 7(a) in low-down mode and Figure 7(b) in lift-up mode; Figure 8 is a front view of the rotation mechanism of a vehicle height control device according to an embodiment of the present invention, with Figure 8(a) in low-down mode and Figure 8(b) in lift-up mode; and Figure 9 is a front view of a vehicle height control device according to an embodiment of the present invention, with Figure 9(a) in low-down mode and Figure 9(b) in lift-up mode.

[0038] As shown in Figure 7(a), in the lowdown mode, the cylindrical rolling surface 21b of the rolling member 20 abuts against the first flat surface 31a of the wedge-shaped member 30. At this time, the center of the other end 12 of the lever 10 is positioned approximately in the center of the sliding spline 22, as shown in Figure 8(a), for example.

[0039] To switch from the low-down mode to the lift-up mode, as shown in Fig. 7(b), the motor 60 is driven to move the wedge-shaped member 30 so that it protrudes in the longitudinal direction (distance A). At this time, as the wedge-shaped member 30 moves in the longitudinal direction, the rolling portion 21 rolls along the raceway surface 31, and the cylindrical rolling surface 21b abuts against the second flat surface 31b. Also, as shown in Fig. 8(b), the second flat surface 31b is disposed so as to be located outward in the vehicle width direction (distance C) than the first flat surface 31a, and as the wedge-shaped member 30 moves in the longitudinal direction (distance A), the axial position of the rolling member 20 also moves outward in the vehicle width direction (distance C).

[0040] As shown in FIG. 8(b), when the axial position of the rolling member 20 moves outward in the vehicle width direction (distance C), the lever 10 rotates (angle E) around the axis of the torsion bar 4. Furthermore, as the lever 10 rotates, the mounting angle of the lever 10 relative to the rolling member 20 also rotates (angle E), and the position of the other end 12 moves upward (distance D). At this time, because the lever 10 is attached to the rolling member 20 via the spherical bearing 13 so as to be able to swing, the mounting angle of the lever 10 relative to the rolling member 20 can be easily changed. Furthermore, because the spherical bearing 13 is attached so as to be able to slide relative to the sliding spline 22, the center position of the other end 12 relative to the sliding spline 22 can be easily changed even when the position of the other end 12 changes in the vertical direction.

[0041] One end 11 of lever 10 and torsion bar 4 attached to the vehicle body are firmly connected so that they can rotate together, and therefore rotation of lever 10 applies a rotational force to torsion bar 4. Similarly, torsion bar 4 and lower arm 3 are firmly fixed so that they can rotate together, and therefore lower arm 3 rotates (angle E) in accordance with the rotation of torsion bar 4. Due to the rotation of lower arm 3, tire 2 supported by lower arm 3 is pushed down, and the height of the vehicle body rises (distance F) as shown in Figure 9(b), and switching to lift-up mode is completed.

[0042] According to this embodiment, as described above, the load applied to the lever 10 and the wedge-shaped member 30 during vehicle height adjustment is in the vehicle width direction and the vertical direction, which intersect with the operating direction of the wedge-shaped member 30. Therefore, the load in the axial direction of the ball screw 50 that operates the wedge-shaped member 30 can be reduced, and the ball screw 50 and motor 60 can be made smaller.

[0043] Furthermore, even when the vehicle height is maintained in the low-down mode or lift-up mode with the vehicle height adjustment device 1 stopped, the load from the tire 2 is applied to the roller 42 and the receiving surface 41 via the wedge-shaped member 30, so no axial load is applied to the ball screw 50, and a locking mechanism for maintaining the vehicle height is not required.

[0044] In the above-described embodiment, the tire 2 is supported by the lower arm 3, but the member supporting the tire 2 is not limited to the lower arm 3 alone, and the tire 2 may be supported by a combination of the lower arm 3 and an upper arm.

[0045] Furthermore, in the vehicle height control device 1 according to this embodiment, the torsion bar 4 may have a suspension function. It is clear from the claims that such modifications or improvements are also included within the technical scope of the present invention. [Explanation of symbols]

[0046] 1 vehicle height adjustment device, 2 tire, 3 lower arm, 4 torsion bar, 5 rotation mechanism, 6 actuator, 10 lever, 13 spherical bearing, 20 rolling member, 21 rolling part, 22 sliding spline, 30 wedge-shaped member, 31a first flat surface, 31b second flat surface, 31c inclined surface, 34 spherical pressure-receiving surface, 35 guide surface, 42 roller, 50 ball screw, 51 screw shaft, 60 motor.

Claims

1. a torsion bar that is connected to a lower arm that supports a tire and is attached to a vehicle; a rotation mechanism that applies a rotational force to the torsion bar; an actuator that operates the rotation mechanism, The rotation mechanism includes: a lever having one end attached to the torsion bar; a wedge-shaped member that rotates the lever around the axis of the torsion bar, The actuator is Moving the wedge-shaped member in a predetermined direction A vehicle height adjustment device characterized by:

2. 2. The vehicle height adjusting device according to claim 1, The wedge-shaped member is a first flat surface and a second flat surface parallel to the direction of movement of the wedge-shaped member; The first flat surface and the second flat surface are smoothly connected via an inclined surface. A vehicle height adjustment device characterized by:

3. 3. The vehicle height control device according to claim 1, The actuator is A ball screw and a motor that rotates the screw shaft of the ball screw are provided. A vehicle height adjustment device characterized by:

4. 4. The vehicle height adjusting device according to claim 3, The wedge-shaped member moves along the axial direction of the screw shaft. A vehicle height adjustment device characterized by:

5. 5. The vehicle height adjusting device according to claim 4, The axial direction of the screw shaft is It is arranged parallel to the axial direction of the torsion bar. A vehicle height adjustment device characterized by:

6. 6. The vehicle height adjusting device according to claim 5, The axial direction of the rotation shaft of the motor is The screw shaft is arranged parallel to the axial direction of the screw shaft. A vehicle height adjustment device characterized by:

7. 7. The vehicle height adjusting device according to claim 1, the rotation mechanism includes a rolling member; The rolling member is attached to the lever so as to be slidable and swingable, and is attached to the wedge-shaped member so as to be rollable. A vehicle height adjustment device characterized by:

8. 8. The vehicle height adjusting device according to claim 7, The rolling members are At least two rolling portions and a spline disposed between the rolling portions, A spherical bearing having an inner ring shape corresponding to the spline is attached to the other end of the lever. A vehicle height adjustment device characterized by:

9. 9. The vehicle height adjusting device according to claim 8, The rolling portion has a spherical rolling surface, The wedge-shaped member has a plurality of spherical pressure-receiving surfaces corresponding to the spherical rolling surfaces. A vehicle height adjustment device characterized by:

10. 10. The vehicle height control device according to claim 1, The wedge-shaped member has a plurality of guide surfaces; It is slidably arranged by a number of rollers attached to the vehicle body. A vehicle height adjustment device characterized by:

11. The vehicle height adjusting device according to claim 10, The guide surface is angled with respect to the vertical direction. A vehicle height adjustment device characterized by:

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