JP7443631B1 - vehicle height adjustment device - Google Patents

Abstract

The vehicle height adjustment device (20) includes a moving member (60) that is provided between the inner tube (40) and the outer tube (50) and can adjust the position of the movable spring receiver (30) by moving in the axial direction. , a jack chamber (21) that is formed between the inner cylinder (40) and the outer cylinder (50) and can be filled with oil that serves as a driving source for the moving member (60), and the inner cylinder (40) or the outer cylinder. A lid (80) is joined to at least one of the jack chambers (50) and closes the jack chamber (21).

Description

The present invention relates to a vehicle height adjustment device using oil as a driving source.

Between the body of the vehicle and the wheels, there is a shock absorber that absorbs shock, and a compression coil spring (elastic body) that applies force to the shock absorber in a direction to restore the length of the shock absorber that has been shortened due to the impact. is provided. Some shock absorbers are equipped with a vehicle height adjustment device that can adjust the vehicle height by adjusting the axial position of a spring receiver that supports an end of a compression coil spring. A prior art related to a vehicle height adjustment device is disclosed in Patent Document 1.

The vehicle height adjustment device disclosed in Patent Document 1 includes a moving member that is in contact with a spring receiver and is movable in the axial direction of a shock absorber. The moving member is driven by oil, which is hydraulic oil, filled in the jack chamber.

The jack chamber includes a first member and a second member. The first member is a cylindrical member provided around the outer periphery of the cylinder of the shock absorber.

The second member is integrally formed with an annular annular portion that fits on the outer circumferential surface of the upper end of the first member, and an outer cylinder portion that extends downward from the annular portion and surrounds a part of the inner cylinder. It is structured and organized. A space surrounded by the cylindrical first member and the annular portion and outer cylindrical portion of the second member becomes a jack chamber.

Patent No. 5936125

The second member in which the annular part and the outer cylinder part are integrated can be manufactured, for example, by cutting an aluminum material, but there is room for improvement from the viewpoint of manufacturing cost.

An object of the present invention is to provide a vehicle height adjustment device that suppresses manufacturing costs.

As a result of extensive studies, the present inventor discovered that a movable member is provided between the inner cylinder and the outer cylinder, and is capable of adjusting the position of the movable spring receiver by moving in the axial direction. It is equipped with a jack chamber that is formed and can be filled with oil that serves as a driving source for the moving member, and a lid that is joined to both the end surface of the inner cylinder and the end surface of the outer cylinder and closes the jack chamber, thereby reducing manufacturing costs. We have discovered that it is possible to provide a vehicle height adjustment device that can reduce vehicle height. The present invention was completed based on these findings.

First, there is a vehicle height adjustment device for a shock absorber,
a movable spring support capable of supporting an elastic body that applies a force to the shock absorber in a direction to extend the entire length of the shock absorber, and movable in the axial direction of the shock absorber;
an inner cylinder arranged coaxially with the buffer;
an outer cylinder arranged around the outer periphery of the inner cylinder;
a moving member provided between the inner cylinder and the outer cylinder and capable of adjusting the position of the movable spring receiver by moving in the axial direction;
a jack chamber formed between the inner cylinder and the outer cylinder and capable of being filled with oil that serves as a driving source for the moving member;
A vehicle height adjustment device is provided, including a lid that is joined to at least one of the inner cylinder or the outer cylinder and closes the jack chamber.

Second, preferably, the vehicle height adjustment device according to the first aspect,
a cylindrical member joined to the outer peripheral surface of the outer cylinder;
A communication hole formed in the outer cylinder is provided so that the inside of the cylinder member and the jack chamber can communicate with each other.

Thirdly, preferably, the vehicle height adjustment device according to the second aspect,
The cylindrical member can be connected to a hose connected to an external hydraulic power source.

Fourthly, preferably, the vehicle height adjustment device according to the first aspect,
The lid is a plate material.

Fifth, preferably, the vehicle height adjustment device according to the fourth aspect,
The inner cylinder and the outer cylinder are made of iron.

Sixth, preferably, the vehicle height adjustment device according to fifth,
The inner cylinder, the outer cylinder, and the lid are joined by welding.

Seventh, preferably the vehicle height adjustment device according to the first,
The moving member has an inner protrusion that protrudes radially inward from an inner guide surface that is guided by the outer peripheral surface of the inner cylinder.

Eighth, preferably, the vehicle height adjustment device according to the first,
The cylinder of the shock absorber and the inner tube are integrally molded from the same material.

Ninth, preferably, the vehicle height adjustment device according to first,
The inner cylinder and the lid are integrally molded from the same material,
The outer cylinder is joined to the lid.

Tenth, preferably, the vehicle height adjustment device according to the first,
The outer cylinder and the lid are integrally molded from the same material,
The inner cylinder is joined to the lid.

Eleventh, a vehicle height adjustment device for a shock absorber,
a movable spring support capable of supporting an elastic body that applies a force to the shock absorber in a direction to extend the entire length of the shock absorber, and movable in the axial direction of the shock absorber;
an inner cylinder arranged coaxially with the buffer;
an outer cylinder arranged around the outer periphery of the inner cylinder;
a moving member provided between the inner cylinder and the outer cylinder and capable of adjusting the position of the movable spring receiver by moving in the axial direction;
a jack chamber formed between the inner cylinder and the outer cylinder and capable of being filled with oil that serves as a driving source for the moving member;
A lid closing off the jack room,
The lid has a fitting part that is press-fitted between the inner cylinder and the outer cylinder, and is fixed to the inner cylinder and the outer cylinder only by the fitting part. A vehicle height adjustment device is provided, comprising: and.

According to the present disclosure, it is possible to provide a vehicle height adjustment device with reduced manufacturing costs.

FIG. 2 is a diagram illustrating a shock absorber equipped with a vehicle height adjustment device according to a first embodiment. FIG. 2 is a sectional view of the vehicle height adjustment device shown in FIG. 1. FIG. FIG. 3 is a cross-sectional view of a vehicle height adjustment device according to a second embodiment. FIG. 7 is a diagram illustrating fitting of the lid of the vehicle height adjustment device according to the third embodiment.

Examples 1 to 3 will be explained based on the attached drawings. Note that the direction in which the movable spring receiver, which will be described later, moves away from the compression coil spring is defined as the top, and the direction in which the movable spring receiver approaches the compression coil is defined as the bottom. In the figure, Up indicates the top and Dn indicates the bottom.

<Example 1>
Please refer to FIG. A hydraulic shock absorber 10 is shown that is provided between a vehicle body and wheels of a two-wheeled vehicle or the like. The hydraulic shock absorber 10 includes a shock absorber body 12 (buffer) that generates a damping force and absorbs shock, and a shock absorber body 12 that applies force to the shock absorber body 12 in a direction to restore the length of the shock absorber body 12 that has been shortened due to the impact. A compression coil spring 11 (elastic body) that provides

(buffer body)
The shock absorber body 12 includes a cylindrical cylinder 13 filled with oil, a piston 14 that is movable inside the cylinder 13, and a rod to which the piston 14 is fixed and which partially protrudes downward from the cylinder 13. It is equipped with 15. Note that in place of the shock absorber main body 12, a well-known shock absorber capable of generating damping force can be employed.

At the top of the cylinder 13, there are provided a cylinder lid 17 that closes the opening at the upper end of the cylinder 13, and a vehicle body side fixing member 16 that is fixed to the cylinder lid 17 and can fix the shock absorber main body 12 to the vehicle body. ing.

The lower end portion 15b of the rod 15 is provided with an axle-side fixing member 18 that can fix the hydraulic shock absorber 10 to the axle. The axle-side fixing member 18 has a lower spring receiving portion 19 that can support the lower end portion 11b of the compression coil spring 11. Note that the orientation of the hydraulic shock absorber 10 does not matter whether it is an inverted type or an upright type.

(inner cylinder/outer cylinder)
See FIG. 2. A vehicle height adjustment device 20 that can be attached to the shock absorber body 12 of the hydraulic shock absorber 10 is shown. The vehicle height adjustment device 20 includes an inner cylinder 40 having an inner peripheral surface 41 in contact with the outer peripheral surface 13a of the cylinder 13, and an outer cylinder 50 surrounding the inner cylinder 40. The inner cylinder 40 and the outer cylinder 50 are arranged concentrically with the axis AX of the shock absorber main body 12. The length of the outer cylinder 50 is longer than that of the inner cylinder 40. The inner tube 40 and the outer tube 50 are made of metal such as iron, for example.

(Movable spring receiver)
The upper end portion 11a of the compression coil spring 11 is supported by a movable spring receiver 30. The movable spring receiver 30 is provided on the outer periphery of the outer cylinder 50 and is movable in a direction along the axis AX of the shock absorber main body 12 (hereinafter referred to as the axial direction). By adjusting the position of the movable spring receiver 30 in the axial direction, the overall length of the hydraulic shock absorber 10 can be changed and the vehicle height can be adjusted.

Specifically, the movable spring receiver 30 includes a cylindrical portion 31 having an inner circumferential surface 32 that is guided by an outer circumferential surface 52 of an outer cylinder 50, and extends radially outward from the upper end 31a of the cylindrical portion 31. an annular outer annular portion 33; a cylindrical large diameter portion 34 extending upward from the radially outer edge of the outer annular portion 33 and having a larger diameter than the cylindrical portion 31; It is a single member integrally formed with an annular inner annular portion 35 extending radially inward of the axis AX.

The outer annular portion 33 can support the upper end portion 11a of the compression coil spring 11 via an annular plate member. A sealing member 24 is provided between the large diameter portion 34 and the outer tube 50 to close the gap between the outer tube 50 and the tube portion 31.

(moving parts)
A moving member 60 that can adjust the position of the movable spring receiver 30 by moving in the axial direction is provided between the inner cylinder 40 and the outer cylinder 50. The moving member 60 is a substantially cylindrical member arranged concentrically with the axis AX of the shock absorber.

Specifically, the moving member 60 includes a base 61 having an inner guide surface 62 that is guided by the outer peripheral surface 42 of the inner cylinder 40, a lower end 70 located below the base 61, and a lower end 70 located above the base 61. The upper end portion 65 and the upper end portion 65 are integrally formed as a single member.

(base)
In addition to the inner guide surface 62, the base portion 61 has outer guide surfaces 63, 63 that are guided by the inner peripheral surface 51 of the outer cylinder 50. The outer guide surfaces 63, 63 are provided at both ends of the base 61 in the axial direction.

(Top end)
A seal member 25 is attached to the upper end portion 65 to close the gap between the moving member 60 and the inner cylinder 40 and the gap between the moving member 60 and the outer cylinder 50.

(bottom end)
The lower end portion 70 of the moving member 60 has an inner circumferential support surface 71 that supports the inner circumferential surface 32 of the cylindrical portion 31 of the movable spring receiver 30, and an annular support surface 71 that supports the inner annular portion 35 of the movable spring receiver 30. It has a tip support surface 72.

Furthermore, the lower end portion 70 has an outer cylinder contact surface 73 that can come into contact with the lower end surface 54 of the outer cylinder 50. When the outer cylinder contact surface 73 is in contact with the lower end surface 54 of the outer cylinder 50, the moving member 60 is located at the uppermost position within its movement range.

(inner protrusion)
The lower end portion 70 has an annular inner protrusion 75 that protrudes radially inward than the inner guide surface 62 . The inner protrusion 75 overlaps the lower end surface 45 of the inner cylinder 40 in the axial direction. The inner circumferential surface 75a of the inner protrusion 75 is in contact with the outer circumferential surface 13a of the cylinder 13. Note that the position in the axial direction where the inner protrusion 75 is provided can be changed as appropriate.

The lower end portion 70 is provided with a sealing member 26 that closes the gap between the lower end portion 70 and the inner annular portion 35 and the gap between the outer peripheral surface 13a of the cylinder 13 and the lower end portion 70.

(Jack room)
A space surrounded by the inner cylinder 40, the outer cylinder 50, and the seal member 25 provided on the moving member 60 becomes a jack chamber 21 that can be filled with oil that serves as a driving source for the moving member 60.

(lid)
The jack chamber 21 is closed by a lid 80. The lid 80 is, for example, an annular plate made of iron. The lower surface 81 of the lid 80 has an inner cylinder joint part 82 joined to the upper end surface 43 of the inner cylinder 40 and an outer cylinder joint part 83 joined to the upper end surface 53 of the outer cylinder 50. . As a joining method, for example, welding (particularly resistance welding) can be employed.

The inner cylinder joint part 82 and the outer cylinder joint part 83 are slightly recessed than the lower surface 81. The upper end surface 43 of the inner cylinder 40 and the upper end surface 53 of the outer cylinder 50 are at the same position with respect to the axial direction. Note that the lower end surface 54 of the outer cylinder 50 is located below the upper end surface 43 of the inner cylinder 40.

(Cylinder member/communication hole)
A cylindrical member 90 having a flow path 91 therein through which oil flows is joined (for example, by resistance welding) to the outer circumferential surface 52 of the outer cylinder 50 . The cylindrical member 90 is obtained, for example, by cutting a metal hexagonal bar. The cylindrical member 90 can be connected to a hose 22 (see FIG. 1) connected to an electric pump P (see FIG. 1) that is an external hydraulic power source. A communication hole 55 is formed in the outer cylinder 50 so that the inside of the cylinder member 90 and the jack chamber 21 can communicate with each other. Note that the oil pressure source is not limited to the electric pump P as long as it generates oil pressure.

(Fixing the vehicle height adjustment device)
An upper surface 85 of the lid 80 is overlapped with the cylinder lid 17. The lid 80 and the cylinder lid 17 can be fixed, for example, by screw fastening using a male thread 87 and a female thread 88.

<Modification of Example 1>
In the first embodiment, three parts, the inner cylinder 40, the outer cylinder 50, and the lid 80, are welded to each other, but for example, the inner cylinder 40 and the lid 80 may be a single part continuously formed from the same material. An inner cylinder with a lid (not shown) may be used, and the outer cylinder 50 may be welded to the inner cylinder with a lid. In that case, the inner tube 40 and the lid 80 may be integrally formed by forging or deep drawing. Further, an outer cylinder with a lid (not shown) in which the outer cylinder 50 and the lid 80 are continuously formed as a single component made of the same material may be used, and the inner cylinder 40 may be welded to the outer cylinder with a lid. In that case, the outer cylinder 50 and the lid 80 may be integrally formed by forging or deep drawing. That is, the lid 80 only needs to be joined to at least one of the inner tube 40 and the outer tube 50.

<Example 2>
See FIG. 3. Components that are common to the vehicle height adjustment device 10 of the first embodiment (see FIG. 2) are given the same reference numerals as those of the first embodiment, and explanations thereof will be omitted. In the vehicle height adjustment device 20A of the second embodiment, an inner cylinder portion 40A corresponding to the inner cylinder 40 of the first embodiment and a cylinder portion 13A corresponding to the cylinder 13 of the first embodiment are made of the same material (for example, iron). It constitutes an integral cylindrical member 29 that is integrally formed.

In the integrated cylindrical member 29, the part where the inner cylindrical part 40A is provided is thicker than other parts. The configuration may be such that it is not provided.

<Example 3>
See FIG. 4. Components that are common to the vehicle height adjustment device 10 of the first embodiment (see FIG. 2) are given the same reference numerals as those of the first embodiment, and explanations thereof will be omitted. In the vehicle height adjustment device 20B of the third embodiment, the lower surface 81 of the lid 80B is press-fitted into the annular opening 99 between the upper end 44 of the inner cylinder 40 and the upper end 56 of the outer cylinder 50. It has an annular fitting part 89. The upper end surface 43 of the inner cylinder 40 and the upper end surface 53 of the outer cylinder 50 are not joined to the lid 80. That is, the lid 80 is fixed to the inner cylinder 40 and the outer cylinder 50 only by the fitting part 89 of the lid 80B.

(First effect)
See FIG. 2. The vehicle height adjustment device 20 is capable of supporting a compression coil spring 11 (elastic body) that applies force to the shock absorber body 12 in the direction of extending the entire length of the shock absorber body 12, and also supports a compression coil spring 11 (elastic body) that applies force to the shock absorber body 12 in the direction of extending the entire length of the shock absorber body 12. A movable spring receiver 30, an inner cylinder 40 disposed on the outer periphery of the shock absorber body 12 so as to be coaxial with the shock absorber body 12, and an inner cylinder 40 disposed on the outer periphery of the shock absorber body 12 so as to be coaxial with the shock absorber body 12. An outer cylinder 50 disposed on the outer periphery of the.

A moving member 60 that can adjust the position of the movable spring receiver 30 by moving in the axial direction is provided between the inner cylinder 40 and the outer cylinder 50. Further, a jack chamber 21 is formed between the inner cylinder 40 and the outer cylinder 50 and can be filled with oil that serves as a driving source for the moving member 60. The jack chamber 21 is joined to both the end face of the inner cylinder 40 and the end face of the outer cylinder 50. It is closed by a lid 80.

That is, the jack chamber 21 includes an inner cylinder 40, an outer cylinder 50, and a lid 80. It has a simple structure in which the jack chamber 21 can be constructed by simply preparing two cylindrical members and a lid 80, and then joining the inner cylinder 40, outer cylinder 50, and lid 80 to each other. A regulating device 20 can be provided.

In addition, the lengths of the inner tube 40 and the outer tube 50 can be set longer than when manufacturing by cutting aluminum material. Therefore, manufacturing costs can be suppressed while ensuring a movable distance of the moving member 60. By changing the lengths of the inner cylinder 40 and the outer cylinder 50, the movable distance of the moving member 60 can also be changed, which provides high versatility.

(Second effect)
The vehicle height adjustment device 20 is formed in the outer cylinder 50 so that a cylinder member 90 joined to the outer circumferential surface 52 of the outer cylinder 50 can communicate with the inside of the cylinder member 90 and the jack chamber 21. A communication hole 55 is provided. It has a simple structure in which a communication hole 55 is formed in the outer cylinder 50 and the inside of the jack chamber 21 and the cylinder member 90 are connected via the communication hole 55, and manufacturing costs can be suppressed. By integrating the four parts of the inner cylinder 40, the outer cylinder 50, the lid 80, and the cylinder member 90 by bonding, the number of man-hours and material costs for cutting conventional aluminum materials can be reduced.

(Third effect)
Please refer to FIG. The cylindrical member 90 can be connected to a hose 22 (see FIG. 1) connected to an electric pump P (see FIG. 1) that is an external hydraulic power source.

(Fourth effect)
Although the shape of the lid 80 can be changed as appropriate, in the first embodiment, the lid 80 is a plate material. By using a plate material, the thickness of the lid 80 can be reduced, and the lengths of the inner tube 40 and the outer tube 50 can be set longer. As a result, the movable distance of the moving member 60 can also be set longer. Since the plate material is usually manufactured by press working, manufacturing costs can also be reduced.

(Fifth effect)
The materials for the inner tube 40 and the outer tube 50 can be selected as appropriate, but in the first embodiment they are made of iron. The materials for the inner tube 40 and the outer tube 50 can be selected as appropriate, but by making them iron, the inner tube 40 and the outer tube 50 have a predetermined strength and are easier to weld, which can reduce manufacturing costs. Additionally, manufacturing costs can be reduced by using common iron pipe materials. Jack chambers of various lengths can be formed by cutting iron pipe material to any length, improving versatility.

(Sixth effect)
Although the method of joining the inner cylinder 40, the outer cylinder 50, and the lid 80 can be selected as appropriate (eg, well-known techniques such as adhesion), in the first embodiment, they are joined by resistance welding. These members can be easily joined together. Note that the iron cylinder member 90 is also joined to the outer cylinder 50 by resistance welding.

(7th effect)
The moving member 60 has an inner protrusion 75 that protrudes radially inward than the inner guide surface 62 that is guided by the outer peripheral surface of the inner cylinder 40 . The inner protrusion 75 and the lower end surface 45 of the inner cylinder 40 overlap each other in the axial direction. By providing the inner protrusion 75, when the movable member 60 is assembled to the inner cylinder 40, the lower end surface 45 of the inner cylinder 40 and the inner protrusion 75 of the movable member 60 can come into contact. It is possible to prevent the moving member 60 from falling off from the inner cylinder 40.

(Eighth effect)
See FIG. 3. The cylinder 13A of the shock absorber main body 12 and the inner cylinder 40A are integrally formed by being continuously formed of the same material. It is possible to reduce the number of parts and reduce manufacturing costs.

(9th effect)
Note that the inner cylinder 40 and the lid 80 may be integrally molded from the same material, and the outer cylinder 50 may be joined to the lid 80. The number of parts can be reduced.

(10th effect)
Furthermore, the outer cylinder 50 and the lid 80 may be integrally molded from the same material, and the inner cylinder 40 may be joined to the lid 80. The number of parts can be reduced.

(Eleventh effect)
See FIG. 4. The lower surface 81 of the lid 80B has an annular fitting part 89 that is press-fitted into an annular opening 99 between the upper end 44 of the inner cylinder 40 and the upper end 56 of the outer cylinder 50. There is. The upper end surface 43 of the inner cylinder 40 and the upper end surface 53 of the outer cylinder 53 are not joined to the lid 80B. That is, the lid 80B is fixed to the inner cylinder 40 and the outer cylinder 50 only by the fitting part 89 of the lid 80B. It is possible to provide a vehicle height adjustment device 20B that has a simple configuration and reduces manufacturing costs.

Note that the present invention is not limited to Examples 1 to 3 as long as the functions and effects of the present invention are achieved.

11...Compression coil spring (elastic body)
12...Buffer body (buffer)
20...Vehicle height adjustment device 21...Jack chamber 22...Hose 29...Integrated cylinder member 30...Movable spring receiver 40...Inner cylinder 42...Outer peripheral surface of inner cylinder 43...Upper end surface of inner cylinder (end surface of inner cylinder)
50...Outer cylinder 52...Outer peripheral surface of the outer cylinder 53...Upper end surface of the outer cylinder (end face of the outer cylinder)
60... Moving member 62... Inner guide surface 75... Inner protrusion part 80, 80B... Lid 89... Lid fitting part 90... Cylindrical member

Claims (8)

A vehicle height adjustment device for a shock absorber,
a movable spring support capable of supporting an elastic body that applies a force to the shock absorber in a direction to extend the entire length of the shock absorber, and movable in the axial direction of the shock absorber;
an inner cylinder arranged coaxially with the buffer;
an outer cylinder arranged around the outer periphery of the inner cylinder;
a moving member provided between the inner cylinder and the outer cylinder and capable of adjusting the position of the movable spring receiver by moving in the axial direction;
a jack chamber formed between the inner cylinder and the outer cylinder and capable of being filled with oil that serves as a driving source for the moving member;
a lid that is joined to at least one of the inner cylinder or the outer cylinder and closes the jack chamber ,
In the vehicle height adjustment device , the inner cylinder, the outer cylinder, and the lid are joined by welding . a cylindrical member joined to the outer peripheral surface of the outer cylinder;
The vehicle height adjustment device according to claim 1, further comprising a communication hole formed in the outer cylinder so that the inside of the cylinder member and the jack chamber can communicate with each other. The vehicle height adjustment device according to claim 2, wherein the cylindrical member is connectable to a hose connected to an external hydraulic power source. The vehicle height adjustment device according to claim 1, wherein the lid is a plate material. The vehicle height adjustment device according to claim 4, wherein the inner cylinder and the outer cylinder are made of iron. A vehicle height adjustment device for a shock absorber,
a movable spring support capable of supporting an elastic body that applies a force to the shock absorber in a direction to extend the entire length of the shock absorber, and movable in the axial direction of the shock absorber;
an inner cylinder arranged coaxially with the buffer;
an outer cylinder arranged around the outer periphery of the inner cylinder;
a moving member provided between the inner cylinder and the outer cylinder and capable of adjusting the position of the movable spring receiver by moving in the axial direction;
a jack chamber formed between the inner cylinder and the outer cylinder and capable of being filled with oil that serves as a driving source for the moving member;
a lid that is joined to at least one of the inner cylinder or the outer cylinder and closes the jack chamber,
In the vehicle height adjustment device, the moving member has an inner protrusion that protrudes radially inward from an inner guide surface that is guided by the outer circumferential surface of the inner cylinder. A vehicle height adjustment device for a shock absorber,
a movable spring support capable of supporting an elastic body that applies a force to the shock absorber in a direction to extend the entire length of the shock absorber, and movable in the axial direction of the shock absorber;
an inner cylinder arranged coaxially with the buffer;
an outer cylinder arranged around the outer periphery of the inner cylinder;
a moving member provided between the inner cylinder and the outer cylinder and capable of adjusting the position of the movable spring receiver by moving in the axial direction;
a jack chamber formed between the inner cylinder and the outer cylinder and capable of being filled with oil that serves as a driving source for the moving member;
a lid that is joined to at least one of the inner cylinder or the outer cylinder and closes the jack chamber,
The inner cylinder and the lid are integrally molded from the same material,
A vehicle height adjustment device, wherein the outer cylinder is joined to the lid. A vehicle height adjustment device for a shock absorber,
a movable spring support capable of supporting an elastic body that applies a force to the shock absorber in a direction to extend the entire length of the shock absorber, and movable in the axial direction of the shock absorber;
an inner cylinder arranged coaxially with the buffer;
an outer cylinder arranged around the outer periphery of the inner cylinder;
a moving member provided between the inner cylinder and the outer cylinder and capable of adjusting the position of the movable spring receiver by moving in the axial direction;
a jack chamber formed between the inner cylinder and the outer cylinder and capable of being filled with oil that serves as a driving source for the moving member; and a lid closing the jack chamber,
The lid has a fitting part that is press-fitted between the inner cylinder and the outer cylinder, and is fixed to the inner cylinder and the outer cylinder only by the fitting part. and a vehicle height adjustment device.

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