CN221569271U - Vehicle shock absorber and vehicle body height adjusting system - Google Patents

Abstract

The embodiment of the application provides a vehicle shock absorber and a vehicle body height adjusting system, wherein the vehicle shock absorber comprises: the piston assembly comprises a piston rod and a piston valve, the inner space of the outer cylinder comprises a first cavity with a variable volume and a sealed second cavity located outside the first cavity, the second cavity is divided into a third cavity formed by the piston valve, the inner cylinder and the bottom valve body and a fourth cavity located outside the third cavity by the piston valve, the inner cylinder and the bottom valve body, the third cavity is communicated with the fourth cavity through the piston valve and the bottom valve body, and the air pressure in the second cavity is regulated by changing the volume of the first cavity, so that the third cavity and the fourth cavity generate air pressure difference to push the piston rod to shift. The air pressure of the other chamber is regulated by changing the volume of the chamber with the variable volume, so that the piston rod is pushed to shift, the height of the vehicle is regulated, the vehicle is adapted to different running environments, and the probability and frequency of faults are reduced.

Description

Vehicle shock absorber and vehicle body height adjusting system

Technical Field

The application relates to the technical field of vehicle accessories, in particular to a vehicle shock absorber and a vehicle body height adjusting system.

Background

In order to improve ride comfort, a shock absorber is generally installed in parallel with an elastic member in a suspension system to attenuate shock transmitted to a vehicle body in order to improve ride comfort, since the elastic member (e.g., an air spring or a coil spring) is subjected to shock in the suspension system during running of the vehicle.

The principle of the shock absorber is that when the frame or the vehicle body and the vehicle axle are subjected to vibration to generate relative motion, the piston in the shock absorber moves up and down, oil in the cavity of the shock absorber repeatedly flows into the other cavity from the one cavity through different holes, friction between the hole wall and the oil and friction between oil molecules form damping force on vibration, namely, mechanical energy of vibration is converted into oil heat energy to be emitted, and the function of damping vibration is realized.

In addition, the prior art also proposes an air suspension comprising a vehicle height adjustment system incorporating a shock absorber, which can change the height of the vehicle body by monitoring road conditions, vehicle speed, etc. to adapt to different driving environments.

However, the existing vehicle height adjusting system is complex in structure and high in fault probability and frequency.

It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solution of the present application and is presented for the convenience of understanding by those skilled in the art. The above-described solutions are not considered to be known to the person skilled in the art simply because they are set forth in the background of the application section.

Disclosure of utility model

To solve at least one of the above problems or other similar problems, embodiments of the present application provide a vehicle shock absorber and a vehicle body height adjustment system.

According to a first aspect of an embodiment of the present application, there is provided a vehicle shock absorber, including: an outer cylinder; an inner cylinder located inside the outer cylinder; the piston assembly is arranged on the inner cylinder; and a bottom valve body arranged between the bottom of the inner cylinder and the bottom of the outer cylinder, wherein the piston assembly comprises a piston rod and a piston valve which is arranged in the inner cylinder and is connected with one end of the piston rod, the other end of the piston rod is connected with a vehicle body,

The inner space of the outer cylinder comprises a first chamber with variable volume and a closed second chamber positioned outside the first chamber,

The second chamber is divided by the piston valve, the inner cylinder and the bottom valve body into a third chamber formed by the piston valve, the inner cylinder and the bottom valve body and a fourth chamber positioned outside the third chamber, the third chamber is communicated with the fourth chamber through the piston valve and the bottom valve body,

And the volume of the first chamber is changed to adjust the air pressure in the second chamber, so that the third chamber and the fourth chamber generate air pressure difference to push the piston rod to displace.

In addition, optionally, the vehicle shock absorber further includes an elastically deformable diaphragm provided to an inner wall of the outer tube, the diaphragm dividing an inner space of the outer tube into the first chamber and the second chamber, the diaphragm and the inner wall of the outer tube forming the first chamber, the volume of the first chamber being changed by deforming the diaphragm by inflating and deflating the first chamber.

In addition, optionally, the vehicle shock absorber further comprises an air valve rod which is arranged on the side wall of the outer cylinder and one end of which is communicated with the first chamber, wherein the other end of the air valve rod is connected with an air compressor, and the first chamber is inflated through the air compressor.

Further, optionally, the first chamber has an initial state, a deflated state in which the first chamber is deflated on the basis of the initial state, and an inflated state in which the first chamber is inflated on the basis of the initial state, the air pressure in the initial state being greater than the ambient air pressure in which the vehicle shock absorber is located, and the first chamber is deflated by opening the air valve stem.

In addition, optionally, the vehicle shock absorber further includes a stopper cover provided at a top of the outer cylinder, the stopper cover limiting a displacement distance of the piston rod.

According to a second aspect of embodiments of the present application, there is provided a vehicle body height adjustment system comprising the vehicle shock absorber of the embodiment of the first aspect.

In addition, optionally, the vehicle body height adjustment system includes at least one vehicle damper provided to a front wheel of a vehicle and at least one vehicle damper provided to a rear wheel of the vehicle, and adjusts a ground clearance of a vehicle body of the vehicle by adjusting a displacement distance of the piston rod of the at least one vehicle damper.

Additionally, optionally, the vehicle body height adjustment system further comprises an air compressor in communication with the first chamber of each vehicle shock absorber, by which the volume of the first chamber of each vehicle shock absorber is adjusted to push the piston rod to displace.

Additionally, optionally, the first chamber has an initial state, a deflated state in which the first chamber is deflated on the basis of the initial state, and an inflated state in which the first chamber is inflated on the basis of the initial state, the air pressure in the initial state being greater than the ambient air pressure in which the vehicle shock absorber is located.

In addition, optionally, the first chamber is changed from the initial state to the deflate state, and the ground clearance of the vehicle body is reduced; the first chamber is changed from the initial state to the inflated state, and the ground clearance of the vehicle body is raised.

One of the beneficial effects of the embodiment of the application is that: the air pressure of the other chamber is regulated through the volume change of the chamber with the variable volume by the simple structure, so that the piston rod is pushed to shift, the height of the vehicle is regulated, the vehicle is adapted to different running environments, the probability and the frequency of faults are reduced, and the operability and the comfort of the vehicle are improved.

Specific embodiments of the application are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the application are not limited in scope thereby. The embodiments of the application include many variations, modifications and equivalents within the scope of the terms of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the application may be combined with elements and features shown in one or more other drawings or implementations. Furthermore, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts as used in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a cross-sectional view of a vehicle shock absorber according to an embodiment of the present application in an axial direction.

Fig. 2 is a schematic diagram of an initial state of the first chamber according to an embodiment of the present application.

Fig. 3 is a schematic illustration of the deflated state of the first chamber of an embodiment of the present application.

Fig. 4 is a schematic illustration of the inflation state of the first chamber according to an embodiment of the present application.

Fig. 5 is a schematic view of a vehicle body height adjustment system according to an embodiment of the present application.

Detailed Description

The foregoing and other features of the application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the specification and drawings, there have been specifically disclosed specific embodiments of the application that are indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments but, on the contrary, is intended to cover all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiments of the present application, the terms "1 st", "2 nd", and the like are used to distinguish different elements from each other by name, but do not indicate spatial arrangement or temporal sequence of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprises," "comprising," "including," "having," and the like, are intended to reference the presence of stated features, elements, components, or groups of components, but do not preclude the presence or addition of one or more other features, elements, components, or groups of components.

In embodiments of the application, the singular forms "a," an, "and" the "may include plural forms and should be construed broadly as" one "or" one type "and not as limited to the meaning of" one; furthermore, the term "comprising" is to be interpreted as including both the singular and the plural, unless the context clearly dictates otherwise. Furthermore, the term "according to" should be understood as "based at least in part on … …", and the term "based on" should be understood as "based at least in part on … …", unless the context clearly indicates otherwise.

In the following description of the present application, for convenience of description, a direction along the central axis OO of the piston rod or a direction parallel to the central axis OO is referred to as an "axial direction", a radial direction centered on the central axis OO is referred to as a "radial direction", a direction away from the central axis OO in a radial direction is referred to as a "radial outside", and a direction closer to the central axis OO in a radial direction is referred to as a "radial inside".

Embodiments of the present application will be described below with reference to the accompanying drawings.

An embodiment of the present application provides a vehicle shock absorber, and fig. 1 is a cross-sectional view of the vehicle shock absorber according to the embodiment of the present application along an axial direction.

As shown in fig. 1, the vehicle shock absorber 1 may include an outer tube 10, an inner tube 20, a piston assembly 30, and a bottom valve body 40. The outer cylinder 10 and the inner cylinder 20 extend along the axial direction, the inner cylinder 20 is positioned inside the outer cylinder 10, the piston assembly 30 is arranged on the inner cylinder 20, and the bottom valve body 40 is arranged between the bottom of the inner cylinder 20 and the bottom of the outer cylinder 10. The inner space of the outer cylinder 10 includes a space between the outer cylinder 10 and the inner cylinder 20 and an inner space of the inner cylinder 20, the piston assembly 30 includes a piston rod 310 and a piston valve 320, the piston valve 320 is disposed in the inner cylinder 20 and connected with one end of the piston rod 310, the other end of the piston rod 310 is connected with a vehicle body, and the tops of the outer cylinder 10 and the inner cylinder 20 each have an opening allowing the other end of the piston rod 310 to pass through.

In the embodiment of the present application, the upper and lower sides of the drawing plane shown in fig. 1 are sometimes referred to as "upper" and "lower", or "top" and "bottom", for convenience of description, and the embodiment of the present application uses "upper", "lower", "top", "bottom" to distinguish the position orientations, but it should be noted that these are only for convenience of description, and do not limit the orientation of the vehicle shock absorber of the embodiment of the present application in manufacturing and using.

As shown in fig. 1, the inner space of the outer tub 10 includes a first chamber 110 and a second chamber 120, the volume of the first chamber 110 may vary, and the second chamber 120 is located outside the first chamber 110 and is airtight. The second chamber 120 is partitioned by the piston valve 320, the inner tube 20, and the bottom valve body 40 into a third chamber 130 and a fourth chamber 140, the third chamber 130 is a space surrounded by the piston valve 320, the inner tube 20, and the bottom valve body 40, the fourth chamber 140 is a space in the second chamber 120 other than the third chamber 130, and the third chamber 130 communicates with the fourth chamber 140 through the piston valve 320 and the bottom valve body 40.

By changing the volume of the first chamber 110, the volume of the second chamber 120 is changed, and since the second chamber 120 is closed, the air pressure in the second chamber 120 is changed, the air pressure in the fourth chamber 140 is changed earlier than the air pressure in the third chamber 130, and the air pressure difference is generated between the two communicated spaces, and the piston rod 310 is pushed to shift in the process of restoring the air pressure of the third chamber 130 and the fourth chamber 140 to be balanced.

For example, in a stationary state, the air pressures of the first chamber 110 and the second chamber 120 are balanced, and the internal pressure and the external pressure to which the piston rod 310 is subjected are also balanced.

As the volume of the first chamber 110 increases, the volume of the second chamber 120 is relatively reduced, the internal air pressure increases, and the air pressure of the third chamber 130 and the fourth chamber 140 increases. The air pressure pushes the piston rod 310 to move upward until the external pressure and the internal pressure received by the piston rod 310 reach equilibrium. Specifically, the internal air pressure of the second chamber 120 increases, and the piston rod 310 receives an internal pressure greater than an external pressure from the air pressure difference generated by the third and fourth chambers 130 and 140, so that the piston rod 310 is pushed upward until the internal pressure generated by the air pressure difference of the third and fourth chambers 130 and 140 reaches equilibrium with the external pressure.

As the volume of the first chamber 110 decreases, the volume of the second chamber 120 increases relatively, the internal air pressure decreases, and the air pressure of the third chamber 130 and the fourth chamber 140 decreases. The piston rod 310 moves downward until the external pressure and the internal pressure to which the piston rod 310 is subjected reach equilibrium. Specifically, the internal air pressure of the second chamber 120 is reduced, and the piston rod 310 receives an air pressure difference from the third chamber 130 and the fourth chamber 140 that generates an internal pressure smaller than an external pressure to which it receives, so that the piston rod 310 is pushed downward until the air pressure difference of the third chamber 130 and the fourth chamber 140 generates an internal pressure that is balanced with the external pressure.

In addition, the second chamber 120 may further contain oil, and the flow of the oil in different chambers forms a damping force, so as to achieve a damping effect, and the embodiment of the present application is not limited thereto.

In at least one embodiment, as shown in fig. 1, the vehicle shock absorber 1 further includes a diaphragm 50 provided to an inner wall of the outer tube 10, the diaphragm 50 and the inner wall of the outer tube 10 forming a first chamber 110, the diaphragm 50 being elastically deformable, whereby the diaphragm 50 can be deformed by inflating and deflating the first chamber 110, thereby changing the volume of the first chamber 110. For example, the diaphragm 50 may be formed of rubber or the like, and in addition, the diaphragm 50 has a certain requirement for strength, and a suitable material may be selected according to practical situations, and the embodiment of the present application is not limited to a specific material.

In addition, optionally, as shown in fig. 1, the vehicle shock absorber 1 further includes an air valve stem 60, and the air valve stem 60 is provided at a side wall of the outer cylinder 10 and has one end in communication with the first chamber 110 and the other end connected to an air compressor (not shown in fig. 1) by which the first chamber 110 can be inflated. In addition, the air valve stem 60 may be opened to deflate the first chamber 110.

Fig. 2 to 4 are schematic views of different states of the first chamber according to the embodiment of the present application. The process of pushing the piston rod 310 to displace by changing the volume of the first chamber 110 will be described with reference to fig. 2 to 4.

In an embodiment of the present application, the first chamber 110 has an initial state (as shown in fig. 2), a deflated state (as shown in fig. 3) that is deflated based on the initial state, and an inflated state (as shown in fig. 4) that is inflated based on the initial state.

As shown in fig. 2, when the first chamber 110 is in the initial state, the air pressure in the first chamber 110 may be greater than the ambient air pressure in which the vehicle shock absorber 1 is located, so that the air valve 60 may be opened to deflate the first chamber 110, for example, as shown in fig. 3, the air is discharged from the air valve 60 (as shown by a dotted arrow in fig. 3), the volume of the first chamber 110 is reduced, and at the same time, the volume of the second chamber 120 is increased, the air pressure is decreased, the internal pressure to which the piston rod 310 is subjected is reduced, the piston rod 310 is moved downward by the external force until the internal pressure to which the piston rod 310 is subjected is balanced with the external force, and the length of the protrusion of the piston rod 310 from the outer cylinder 10 is reduced from L1 to L2.

When the first chamber 110 is in the initial state, the piston rod 310 protrudes from the outer cylinder 10 by a length L1; when air valve stem 60 is connected to an air compressor, as shown in fig. 4, the air compressor (not shown in fig. 4) causes air to flow from air valve stem 60 into first chamber 110 (as shown by the dotted arrow in fig. 4), the volume of first chamber 110 increases, and at the same time, the volume of second chamber 120 decreases, the air pressure increases, the air pressure of third chamber 130 and fourth chamber 140 increases, the internal pressure to which piston rod 310 is subjected increases, and piston rod 310 moves upward under the internal pressure until the external pressure and the internal pressure to which piston rod 310 is subjected reach equilibrium. The length of the piston rod 310 protruding from the outer tube 10 increases from L1 to L3.

In addition, the above description has been given taking the transition from the initial state to the deflated state or the inflated state as an example, but the embodiment of the present application is not limited thereto, that is, the transition may be made directly from the deflated state shown in fig. 3 to the inflated state shown in fig. 4, or directly from the inflated state shown in fig. 4 to the deflated state shown in fig. 3, without staying or holding in the initial state.

In addition, alternatively, as shown in fig. 1, the vehicle shock absorber 1 may further include a stopper cover 70 provided at the top of the outer tube 10, the stopper cover 70 serving to limit the displacement distance of the piston rod 310. In addition, as shown in fig. 1, the vehicle shock absorber 1 may further include a rod guide assembly 80 and a sealing assembly 90, for example, the rod guide assembly 80 includes a bearing for supporting the piston rod 310 to rotate, and the sealing assembly 90 seals the outer cylinder 10, for example, and the embodiment of the present application is not limited thereto by referring to the related art.

In addition, optionally, as shown in fig. 1, the vehicle shock absorber 1 may further include a base cover 100, and the base cover 100 seals the bottom of the outer tub 10. However, the embodiment of the present application is not limited thereto, and the bottom of the outer tub 10 and the tub body may be of one integral structure.

According to the vehicle shock absorber provided by the embodiment of the application, the air pressure of the other chamber is regulated through the volume change of the chamber with the variable volume by virtue of a simple structure, so that the piston rod is pushed to shift, the height regulation of the vehicle is realized, the vehicle is adapted to different running environments, and the operability and the comfort of the vehicle are improved.

The embodiment of the present application further provides a vehicle body height adjustment system, and fig. 5 is a schematic diagram of the vehicle body height adjustment system according to the embodiment of the present application, and as shown in fig. 5, a vehicle body height adjustment system 1000 includes the vehicle shock absorber 1 according to the foregoing embodiment. Since the structure of the vehicle shock absorber 1 has been described in detail in the foregoing embodiment, the contents thereof are incorporated herein, and the description thereof is omitted here.

As shown in fig. 5, the vehicle body height adjustment system 1000 includes at least one vehicle shock absorber 1 provided to the front wheels of the vehicle 3 and at least one vehicle shock absorber 1 provided to the rear wheels of the vehicle 3. The ground clearance of the body of the vehicle 3 is adjusted by adjusting the displacement distance of the piston rod 310 (shown in fig. 2 to 4) of at least one vehicle shock absorber 1. Thus, by adjusting the ground clearance of the vehicle body, the vehicle can be adapted to different driving environments, for example, the ground clearance of the vehicle body can be increased when off-road. In addition, compared with the vehicle height adjusting system in the prior art, the vehicle height adjusting system is simpler in structure, and therefore the probability and frequency of faults can be reduced.

In addition, as shown in fig. 5, optionally, the vehicle body height adjusting system 1000 further includes an air compressor 2 in communication with the first chamber 110 (shown in fig. 1) of each vehicle shock absorber 1, and the piston rod 310 is pushed to displace by adjusting the volume of the first chamber 110 of each vehicle shock absorber 1 by the air compressor 2, and a specific adjusting method may refer to the descriptions of fig. 2 to 4 in the above embodiments, which is not described here.

In addition, alternatively, the first chamber 110 has an initial state, a deflated state in which it is deflated on the basis of the initial state, and an inflated state in which it is inflated on the basis of the initial state, and the air pressure in the first chamber 110 in the initial state is greater than the ambient air pressure in which the vehicle shock absorber 1 is located.

In addition, alternatively, the first chamber 110 is changed from the initial state to the deflated state, and the ground clearance of the vehicle body is lowered; the first chamber 110 is changed from the initial state to the inflated state, and the ground clearance of the vehicle body is raised.

For example, as shown in fig. 2 and 3, the first chamber 110 is changed from the initial state to the deflated state, the length of the piston rod 310 protruding from the outer tube 10 is reduced, and accordingly, in the vehicle body height adjustment system 1000, the length of the piston rod 310 of each vehicle shock absorber 1 protruding from the outer tube 10 is reduced, so that the vehicle body is lowered, that is, the ground clearance of the vehicle body is lowered.

As shown in fig. 2 and 4, the first chamber 110 is changed from the initial state to the inflated state, the length of the piston rod 310 protruding from the outer tube 10 increases, and accordingly, in the vehicle body height adjusting system 1000, the length of the piston rod 310 protruding from the outer tube 10 of each vehicle shock absorber 1 increases, so that the vehicle body rises, that is, the ground clearance of the vehicle body rises.

In addition, the piston rod of the vehicle damper 1 shown in fig. 5 is directed upward in the drawing of fig. 5, but the embodiment of the present application is not limited thereto, and the installation direction of the vehicle damper 1 in the vehicle 3 may be set according to actual needs, and fig. 5 is only a schematic view, and does not limit the direction of the vehicle damper of the embodiment of the present application at the time of manufacturing and use.

In addition, the vehicle body height adjustment system 1000 may further include a control device and a distance sensor provided at the vehicle bottom, wherein the control device may control the amount of inflation of the air compressor 2 based on data measured by the distance sensor when the vehicle body height needs to be raised, and the control device may control the amount of gas discharged from, for example, the air valve stem 60 based on data measured by the distance sensor when the vehicle body height needs to be lowered. Thus, the height adjustment can be adaptively performed, and the height adjustment can be performed according to the intention of the driver.

In addition, the adjustment amount of the ground clearance of the vehicle body is related to the force applied to the vehicle suspension by the piston rod 310 of the vehicle shock absorber 1 and the spring coefficient of the elastic element in the vehicle suspension, for example, the applied force is 3000N, the spring coefficient of the elastic element at the front wheel is 25N/mm, the spring coefficient of the elastic element at the rear wheel is 50N/mm, then the displacement amount of the ground clearance at the front wheel side is approximately 3000/25=120 mm, and the displacement amount of the ground clearance at the rear wheel side is approximately 3000/50=60 mm.

In addition, the vehicle body height adjustment system 1000 shown in fig. 5 includes the vehicle dampers 1 corresponding to each tire, but the embodiment of the application is not limited thereto, and one vehicle damper 1 may be provided at each of the center position on the front wheel side and the center position on the rear wheel side, and further, a plurality of vehicle dampers 1 may be provided, and the number of vehicle dampers 1 included in the vehicle body height adjustment system 1000 may be set according to actual needs, and the embodiment of the application is not limited thereto.

According to the vehicle body height adjusting system provided by the embodiment of the application, the air pressure of the other chamber is adjusted through the volume change of the chamber with the variable volume by virtue of a simple structure, so that the piston rod is pushed to shift, the vehicle height adjustment is realized, the vehicle is adapted to different running environments, the probability and frequency of faults are reduced, and the operability and comfort of the vehicle are improved.

It should be noted that the above only describes the respective components or modules related to the present application, but the present application is not limited thereto. The vehicle shock absorber and the vehicle body height adjustment system of the embodiment of the application may further include other components or modules, and for the details of these components or modules, reference may be made to the related art.

Claims (10)

1. A vehicle shock absorber, the vehicle shock absorber comprising: an outer cylinder; an inner cylinder located inside the outer cylinder; the piston assembly is arranged on the inner cylinder; and a bottom valve body arranged between the bottom of the inner cylinder and the bottom of the outer cylinder, wherein the piston assembly comprises a piston rod and a piston valve which is arranged in the inner cylinder and is connected with one end of the piston rod, the other end of the piston rod is connected with a vehicle body,

The inner space of the outer cylinder comprises a first chamber with variable volume and a closed second chamber positioned outside the first chamber,

The second chamber is divided by the piston valve, the inner cylinder and the bottom valve body into a third chamber formed by the piston valve, the inner cylinder and the bottom valve body and a fourth chamber positioned outside the third chamber, the third chamber is communicated with the fourth chamber through the piston valve and the bottom valve body,

The air pressure in the second chamber is adjusted by changing the volume of the first chamber, so that the third chamber and the fourth chamber generate an air pressure difference to push the piston rod to displace.

2. The vehicle shock absorber according to claim 1, wherein,

The vehicle shock absorber further includes an elastically deformable diaphragm provided to an inner wall of the outer tube,

The diaphragm divides the inner space of the outer cylinder into the first chamber and the second chamber,

The diaphragm and the inner wall of the outer cylinder form the first chamber, and the volume of the first chamber is changed by inflating and deflating the first chamber to deform the diaphragm.

3. The vehicle shock absorber according to claim 2, further comprising an air valve stem provided to a side wall of said outer tube and having one end in communication with said first chamber, the other end of said air valve stem being connected to an air compressor, said first chamber being inflated by said air compressor.

4. The vehicle shock absorber according to claim 3, wherein,

The first chamber has an initial state, a deflated state in which it is deflated on the basis of the initial state, and an inflated state in which it is inflated on the basis of the initial state,

The air pressure in the first chamber in the initial state is greater than the ambient air pressure in which the vehicle shock absorber is located, and the first chamber is deflated by opening the air valve stem.

5. The vehicle shock absorber according to claim 1, wherein,

The vehicle shock absorber further includes a stopper cover provided at a top of the outer cylinder, the stopper cover limiting a displacement distance of the piston rod.

6. A vehicle body height adjustment system, characterized in that the vehicle body height adjustment system comprises the vehicle shock absorber according to any one of claims 1 to 5.

7. The vehicle body height adjustment system according to claim 6, wherein the vehicle body height adjustment system comprises at least one vehicle damper provided to a front wheel of a vehicle and at least one vehicle damper provided to a rear wheel of the vehicle, and the ground clearance of the vehicle body of the vehicle is adjusted by adjusting a displacement distance of the piston rod of at least one vehicle damper.

8. The vehicle body height adjustment system according to claim 7, further comprising an air compressor in communication with the first chamber of each vehicle shock absorber, the volume of the first chamber of each vehicle shock absorber being adjusted by the air compressor to push the piston rod to displace.

9. The vehicle body height adjustment system according to claim 8, wherein,

The first chamber having an initial state, a deflated state in which the first chamber is deflated on the basis of the initial state, and an inflated state in which the first chamber is inflated on the basis of the initial state, the air pressure in the initial state being greater than the ambient air pressure in which the vehicle shock absorber is located,

The air compressor inflates the first chamber.

10. The vehicle body height adjustment system according to claim 9, wherein,

The first chamber is changed from the initial state to the air release state, and the ground clearance of the vehicle body is reduced;

the first chamber is changed from the initial state to the inflated state, and the ground clearance of the vehicle body is raised.