Shock absorber, suspension system and vehicle

Abstract

A vehicle, comprising a shock absorber. The shock absorber comprises a housing, a piston assembly, a first adjustable damping valve, a second adjustable damping valve and a communication member. A liquid storage chamber and a working chamber located on the radial inner side of the liquid storage chamber are defined in the housing. The piston assembly divides the working chamber into a first working sub-chamber and a second working sub-chamber which communicate with the liquid storage chamber. The first adjustable damping valve has a first valve port and a second valve port. The second adjustable damping valve has a third valve port and a fourth valve port. A first communication channel, a second communication channel and a third communication channel are formed in the communication member, the first communication channel communicating with the second working sub-chamber and the first valve port, the second communication channel communicating with the liquid storage chamber and the third valve port, and the third communication channel communicating with the second valve port and the fourth valve port.

Description

Shock absorbers, suspension systems and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to the Chinese patent application entitled “Shock Absorber, Suspension System and Vehicle” filed with the State Intellectual Property Office of China on December 29, 2023, with application number 202311862333.0, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the technical field of vehicles, and in particular to a shock absorber, a suspension system and a vehicle. Background Art

[0004] Shock absorbers are devices used to accelerate the attenuation of vibrations between the vehicle frame and body to improve the driving comfort of the vehicle. Conventional shock absorbers have complex structures, large volumes, and heavy weights, which are not conducive to their production, processing, and use.

[0005] Summary of the Invention

[0006] The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present disclosure is to provide a shock absorber with a simple structure, small size, low material consumption and light weight, which is convenient for production, processing and use of the shock absorber.

[0007] Another object of the present disclosure is to provide a suspension system using the shock absorber.

[0008] Yet another object of the present disclosure is to provide a vehicle adopting the above suspension system.

[0009] The shock absorber according to the embodiment of the first aspect of the present disclosure includes: a shell, wherein a liquid storage chamber and a working chamber are defined in the shell, and the working chamber is located radially inside the liquid storage chamber; a piston assembly, wherein the piston assembly is movably arranged in the working chamber, and the piston assembly divides the working chamber into a first working chamber and a second working chamber, and the first working chamber is connected to the liquid storage chamber; a first damping adjustable valve and a second damping adjustable valve, wherein the first damping adjustable valve has a first valve port and a second valve port, the first damping adjustable valve is used to adjust the flow damping between the first valve port and the second valve port, and the second damping adjustable valve is used to adjust the flow damping between the first valve port and the second valve port The Nicol adjustable valve has a third valve port and a fourth valve port, and the second damping adjustable valve is used to adjust the flow damping between the third valve port and the fourth valve port; a connecting piece, on which a first connecting channel, a second connecting channel and a third connecting channel are formed, the first connecting channel connects the second working chamber and the first valve port, the second connecting channel connects the liquid storage chamber and the third valve port, the third connecting channel connects the second valve port and the fourth valve port, and the third connecting channel is unidirectionally connected to the second connecting channel, and the third connecting channel is unidirectionally connected to the first connecting channel.

[0010] According to the shock absorber of the first embodiment of the present disclosure, by providing a connecting piece, the connection between the first damping adjustable valve and the second damping adjustable valve, as well as the connection between the first damping adjustable valve and the second damping adjustable valve and the interior of the housing are achieved, which is beneficial to the flow of fluid inside the housing and between the first damping adjustable valve and the second damping adjustable valve during the operation of the shock absorber, so as to facilitate the normal use of the shock absorber. Moreover, the structure of the shock absorber is simplified, the volume of the shock absorber is reduced, and the weight of the shock absorber is reduced, which is beneficial to the production, processing and use of the shock absorber and can also reduce the production cost of the shock absorber. In addition, the design of the first connecting channel, the second connecting channel and the third connecting channel on the connecting piece is reasonable, which realizes that one of the first damping adjustable valve and the second damping adjustable valve of the shock absorber controls compression, and the other of the first damping adjustable valve and the second damping adjustable valve controls recovery, and the damping force can be adjusted separately, thereby improving the performance of the shock absorber.

[0011] According to some embodiments of the present disclosure, a first one-way communicating member is provided between the communicating member and the first adjustable damping valve, and a second one-way communicating member is provided between the communicating member and the second adjustable damping valve. The shock absorber has a compression state and a restoration state. When the shock absorber is in the compression state, the piston assembly compresses the second working sub-chamber, and the fluid in the second working sub-chamber flows to the first valve port through the first communicating channel, then flows from the second valve port to the third communicating channel through the interior of the first adjustable damping valve, then enters the second communicating channel through the second one-way communicating member, and finally flows into the first working sub-chamber through the liquid storage chamber; when the shock absorber is in the restoration state, the piston assembly compresses the first working sub-chamber, and the fluid in the first working sub-chamber flows to the third valve port through the liquid storage chamber through the second communicating channel, then flows from the fourth valve port to the third communicating channel through the interior of the second adjustable damping valve, then enters the first communicating channel through the first one-way communicating member, and finally flows into the second working sub-chamber.

[0012] According to some embodiments of the present disclosure, the connecting piece is provided on the housing, and the connecting piece is located on a side of the second working sub-chamber away from the first working sub-chamber.

[0013] According to some embodiments of the present disclosure, the shell includes a first shell and a second shell that are nested in sequence from the outside to the inside, the liquid storage chamber is defined between the first shell and the second shell, and the working chamber is defined in the second shell.

[0014] According to some embodiments of the present disclosure, a mating groove is formed on the connecting piece, one end of the first connecting channel and one end of the second connecting channel pass through the bottom wall of the mating groove, the second shell extends into the mating groove, and the side wall of the second shell separates the one end of the first connecting channel and the one end of the second connecting channel.

[0015] According to some embodiments of the present disclosure, a plurality of mating protrusions arranged circumferentially at intervals are provided on the side wall of the mating groove, and the side wall of the second shell is mated to the inner circumferential side of the plurality of mating protrusions; an air-avoidance flow channel is defined between two adjacent mating protrusions, and the liquid storage chamber and the second connecting channel are connected through the air-avoidance flow channel.

[0016] According to some embodiments of the present disclosure, the one end of the second communicating channel is located between the one end of the first communicating channel and the mating protrusion along the radial direction of the housing.

[0017] According to some embodiments of the present disclosure, the first connecting channel includes a first channel section and a second channel section connected to each other, the first channel section extends axially along the shell, the free end of the first channel section is connected to the second working chamber, the second channel section extends radially along the shell, and the free end of the second channel section is connected to the first valve port.

[0018] According to some embodiments of the present disclosure, the second connecting channel includes a third channel section and a fourth channel section that are connected to each other, the third channel section extends along the axial direction of the shell, the free end of the third channel section is connected to the liquid storage chamber, the third channel section is spaced apart from the first channel section in the axial direction perpendicular to the shell, the fourth channel section extends along the radial direction of the shell, the free end of the fourth channel section is connected to the third valve port and extends in a direction away from the free end of the second channel section.

[0019] According to some embodiments of the present disclosure, the third communicating channel is located on a side of the first communicating channel and the second communicating channel away from the second working sub-chamber.

[0020] According to some embodiments of the present disclosure, both the first adjustable damping valve and the second adjustable damping valve are connected to the connecting member.

[0021] According to some embodiments of the present disclosure, the first adjustable damping valve and the second adjustable damping valve are opposite to each other in a radial direction of the housing.

[0022] According to some embodiments of the present disclosure, the volume of the third communication channel is variable, and when the shock absorber is working, the volume of the third communication channel changes with the change of the pressure in the third communication channel.

[0023] According to some embodiments of the present disclosure, the shock absorber further includes: a gas compression device, which is provided on the connecting piece, and has compressed gas inside the gas compression device, and the gas compression device is configured such that the compressed gas is compressed when the fluid pressure in the third connecting channel increases, and the compressed gas is restored when the fluid pressure in the third connecting channel decreases.

[0024] According to some embodiments of the present disclosure, the gas compression device includes: a shell, which is connected to a side of the connecting piece away from the shell, and the shell and the connecting piece jointly define the third connecting channel; a floating piston, which is movably arranged in the shell, and the floating piston separates the third connecting channel into the connecting piece connecting channel and a compressed gas chamber, the connecting piece connecting channel is unidirectionally connected to the second connecting channel, and the connecting piece connecting channel is unidirectionally connected to the first connecting channel, and the compressed gas is located in the compressed gas chamber.

[0025] According to some embodiments of the present disclosure, the gas compression device is an accumulator, an air bag, or a bellows.

[0026] According to some embodiments of the present disclosure, at least one through hole is formed on the shell, and the liquid storage chamber and the first working sub-chamber are connected through the through hole.

[0027] According to some embodiments of the present disclosure, there are a plurality of through holes, and at least two of the plurality of through holes are staggered along the circumferential direction and the axial direction of the working chamber.

[0028] According to some embodiments of the present disclosure, the through hole is located on a side away from the second working sub-chamber at a maximum stroke position when the piston assembly compresses the first working sub-chamber.

[0029] A suspension system according to an embodiment of the second aspect of the present disclosure includes the shock absorber according to the embodiment of the first aspect.

[0030] A vehicle according to an embodiment of the third aspect of the present disclosure includes the shock absorber according to the embodiment of the first aspect, or the suspension system according to the embodiment of the second aspect.

[0031] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] FIG1 is a schematic diagram of a shock absorber according to an embodiment of the present disclosure;

[0034] FIG2 is a partial schematic diagram of a shock absorber according to an embodiment of the present disclosure;

[0035] FIG3 is a schematic diagram of a connecting piece of a shock absorber according to an embodiment of the present disclosure;

[0036] 4 is a cross-sectional view of a connecting member of a shock absorber according to an embodiment of the present disclosure;

[0037] 5 is a top view of a connecting piece of a shock absorber according to an embodiment of the present disclosure;

[0038] 6 is a side view of a connecting piece of a shock absorber according to an embodiment of the present disclosure;

[0039] 7 is a schematic diagram of a second housing of a shock absorber according to an embodiment of the present disclosure;

[0040] 8 is a schematic diagram of fluid flow in a compression state of a shock absorber according to an embodiment of the present disclosure;

[0041] 9 is a schematic diagram of fluid flow in a restored state of a shock absorber according to an embodiment of the present disclosure;

[0042] FIG10 is a schematic block diagram of a suspension system according to an embodiment of the present disclosure;

[0043] FIG11 is a schematic block diagram of a vehicle according to an embodiment of the present disclosure;

[0044] FIG. 12 is another schematic block diagram of a vehicle according to an embodiment of the present disclosure.

[0045] FIGURES: 100, shock absorber; 1, housing; 11, first housing; 12, second housing; 121, working chamber; 1211, first working sub-chamber; 1212, second working sub-chamber; 122, piston assembly; 123, through hole; 13, liquid storage chamber; 2, first adjustable damping valve; 21, first valve port; 22, second valve port; 23, first one-way conducting member; 3, second adjustable damping valve; 31, third valve port; 32, fourth valve port; 33, second one-way conducting member; 4, connecting member; 41, first connecting channel; 411, first channel section; 412, second channel section; 42, second connecting channel; 421, third channel section; 422, fourth channel section; 43, third connecting channel; 431, connecting member connecting channel; 44, mating groove; 441, mating protrusion; 442, air-avoiding flow channel; 5. Gas compression device; 51. Housing; 5111. Compressed gas chamber; 512. Inflating nozzle; 52. Floating piston; 1000. Suspension system; 2000. Vehicle. DETAILED DESCRIPTION

[0046] The embodiments of the present disclosure are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The shock absorber 100 according to the embodiment of the first aspect of the present disclosure is described below with reference to FIG. 1 to FIG. 9 .

[0047] As shown in FIG. 1 and FIG. 2 , a shock absorber 100 according to an embodiment of the first aspect of the present disclosure includes a housing 1 , a first adjustable damping valve 2 , a second adjustable damping valve 3 and a connecting piece 4 .

[0048] Specifically, a liquid storage chamber 13 and a working chamber 121 are defined in the shell 1. The working chamber 121 is located radially inward of the liquid storage chamber 13. The piston assembly 122 is movably disposed in the working chamber 121. The piston assembly 122 divides the working chamber 121 into a first working chamber 1211 and a second working chamber 1212. The first working chamber 1211 is connected to the liquid storage chamber 13.

[0049] For example, in the examples of Figures 1 and 2 , the liquid storage chamber 13 and the working chamber 121 are arranged radially toward the center of the housing 1. The first working chamber 1211 and the second working chamber 1212 are opposed to each other in the vertical direction, and the piston assembly 122 can move axially (i.e., in the vertical direction in Figure 1 ) along the housing 1. For example, when the piston assembly 122 moves upward, the volume of the first working chamber 1211 decreases, and the fluid in the first working chamber 1211 can flow into the liquid storage chamber 13. This arrangement simplifies the structure of the housing 1 and reduces its mass. The housing 1 is radially divided into only two spaces, thereby simplifying the structure of the shock absorber 100, reducing the volume of the shock absorber 100, and further facilitating the production and processing of the shock absorber 100.

[0050] 1 and 2 , the first damping adjustable valve 2 has a first valve port 21 and a second valve port 22, and is used to adjust the flow damping between the first valve port 21 and the second valve port 22. The second damping adjustable valve 3 has a third valve port 31 and a fourth valve port 32, and is used to adjust the flow damping between the third valve port 31 and the fourth valve port 32. A first connecting channel 41, a second connecting channel 42, and a third connecting channel 43 are formed on the connecting member 4. The first connecting channel 41 connects the second working chamber 1212 and the first valve port 21, the second connecting channel 42 connects the liquid storage chamber 13 and the third valve port 31, and the third connecting channel 43 connects the second valve port 22 and the fourth valve port 32. The third connecting channel 43 is unidirectionally connected to the second connecting channel 42, and the third connecting channel 43 is unidirectionally connected to the first connecting channel 41.

[0051] For example, in the examples of Figures 1 and 2 , the first adjustable damping valve 2 can communicate with the second working chamber 1212 via the first valve port 21 and the first communication channel 41, the second adjustable damping valve 3 can communicate with the liquid storage chamber 13 via the third valve port 31 and the second communication channel 42, the liquid storage chamber 13 and the first working chamber 1211 are in communication, and the second valve port 22 of the first adjustable damping valve 2 and the fourth valve port 32 of the second adjustable damping valve 3 are in communication via the third communication channel 43. The right side of the third communication channel 43 is in one-way communication with the second communication channel 42, and the left side of the third communication channel 43 is in one-way communication with the first communication channel 41. That is, the fluid in the third communicating channel 43 can flow unidirectionally into the second communicating channel 42, but the fluid in the second communicating channel 42 cannot flow directly into the third communicating channel 43; the fluid in the third communicating channel 43 can flow unidirectionally into the first communicating channel 41, but the fluid in the first communicating channel 41 cannot flow directly into the third communicating channel 43, so as to facilitate the flow of fluid between the connecting member 4, the first damping adjustable valve 2, the second damping adjustable valve 3 and the housing 1.

[0052] It should be noted that the first communication channel 41, the second communication channel 42, and the third communication channel 43 can be formed on the communication member 4. In other words, they are defined by the communication member 4 itself. Alternatively, the first communication channel 41, the second communication channel 42, and the third communication channel 43 can be formed by the communication member 4 and an external component. For example, in the embodiment of the present application, the third communication channel 43 is a space enclosed by the communication member 4 and the housing 51.

[0053] Thus, through the cleverly designed flow channels (e.g., the first communication channel 41, the second communication channel 42, and the third communication channel 43) on the connecting member 4, one of the first and second adjustable damping valves 2 and 3 of the shock absorber 100 is controlled for compression, while the other of the first and second adjustable damping valves 2 and 3 is controlled for recovery. Furthermore, the damping force can be adjusted independently, thereby improving the performance of the shock absorber 100. Furthermore, during operation of the shock absorber 100, the flow of fluid within the housing 1 and between the first and second adjustable damping valves 2 and 3 is facilitated, thereby facilitating the normal operation of the shock absorber 100. Furthermore, the connecting member 4 enables communication between the first and second adjustable damping valves 2 and 3, as well as between the first and second adjustable damping valves 2 and 3 and the interior of the housing 1. This simplifies the structure of the shock absorber 100, reduces its volume, and reduces its mass, facilitating the production, processing, and use of the shock absorber 100 and reducing its production cost. For example, the cross-sectional areas of the first valve port 21 , the second valve port 22 , the third valve port 31 and the fourth valve port 32 cannot be too small to avoid generating a large damping force.

[0054] According to the shock absorber 100 of the first embodiment of the present disclosure, by providing a connecting piece 4, the connection between the first damping adjustable valve 2 and the second damping adjustable valve 3 is achieved, as well as the connection between the first damping adjustable valve 2 and the second damping adjustable valve 3 and the interior of the housing 1. This facilitates the flow of fluid within the housing 1 and between the first damping adjustable valve 2 and the second damping adjustable valve 3 during the operation of the shock absorber 100, thereby facilitating the normal use of the shock absorber 100. Moreover, the structure of the shock absorber 100 is simplified, the volume of the shock absorber 100 is reduced, and the mass of the shock absorber 100 is reduced, which is beneficial to the production, processing, and use of the shock absorber 100 and can also reduce the production cost of the shock absorber 100. In addition, the first connecting channel 41, the second connecting channel 42 and the third connecting channel 43 on the connecting member 4 are reasonably designed, so that one of the first damping adjustable valve 2 and the second damping adjustable valve 3 of the shock absorber 100 controls compression, and the other of the first damping adjustable valve 2 and the second damping adjustable valve 3 controls restoration, and the damping force can be adjusted separately, thereby improving the performance of the shock absorber 100.

[0055] According to some embodiments of the present disclosure, in combination with Figures 1, 8 and 9, a first one-way conducting member 23 is provided between the connecting member 4 and the first damping adjustable valve 2, and a second one-way conducting member 33 is provided between the connecting member 4 and the second damping adjustable valve 3, and the shock absorber 100 has a compression state and a recovery state.

[0056] Specifically, when the shock absorber 100 is in a compression state, the piston assembly 122 compresses the second working chamber 1212, and the fluid in the second working chamber 1212 flows to the first valve port 21 through the first connecting channel 41, and then flows from the second valve port 22 to the third connecting channel 43 through the inside of the first damping adjustable valve 2, and then enters the second connecting channel 42 through the second one-way guide member 33, and finally flows into the first working chamber 1211 through the liquid storage chamber 13.

[0057] For example, in the example of FIG8 , when the shock absorber 100 is in a compressed state, the flow process of the fluid within the shock absorber 100 (e.g., the direction indicated by arrow A in FIG8 ) is as follows: the piston assembly 122 moves downward, compressing the second working chamber 1212. At this time, the volume of the second working chamber 1212 decreases, while the volume of the first working chamber 1211 increases. The fluid within the second working chamber 1212 flows along the first connecting channel 41 to the first valve port 21, flows from the second valve port 22 into the interior of the first adjustable damping valve 2, and then flows from the second valve port 22 to the third connecting channel 43. As the fluid flows through the first adjustable damping valve 2, the first adjustable damping valve 2 controls and adjusts the damping force, thereby facilitating the use of the shock absorber 100. The fluid in the third communication channel 43 flows directly into the second communication channel 42 through the second one-way communication member 33 (for example, the second one-way communication member 33 can be a one-way valve). In other words, when the shock absorber 100 is in the compressed state, the second adjustable damping valve 3 only functions as a communication channel and does not function to adjust the damping. The fluid in the second communication channel 42 then flows through the liquid storage chamber 13 into the first working sub-chamber 1211. This completes one compression cycle of the shock absorber 100.

[0058] With this arrangement, the fluid flows more smoothly between the second working chamber 1212 and the first working chamber 1211, improving the reliability and performance of the shock absorber 100. Furthermore, the shock absorber 100 has a simple structure and a short flow path, facilitating its production and processing. When used in a vehicle, the shock absorber 100 can improve vehicle driving comfort. It should be noted that in the above description, the second one-way conducting member 33 is disposed on the second adjustable damping valve 3. Of course, the second one-way conducting member 33 can also be disposed on the connecting member 4 to achieve one-way communication between the third connecting channel 43 and the second connecting channel 42.

[0059] When the shock absorber 100 is in the restored state, the piston assembly 122 compresses the first working chamber 1211, and the fluid in the first working chamber 1211 flows through the liquid storage chamber 13 and the second connecting channel 42 to the third valve port 31, and then flows from the fourth valve port 32 to the third connecting channel 43 through the inside of the second adjustable damping valve 3, and then enters the first connecting channel 41 through the first one-way guide member 23 and flows into the second working chamber 1212.

[0060] For example, in the example of FIG. 9 , when the shock absorber 100 is in the restored state, the fluid flow process within the shock absorber 100 (e.g., the direction indicated by arrow B in FIG. 9 ) is as follows: the piston assembly 122 moves upward, compressing the first working chamber 1211. At this time, the volume of the first working chamber 1211 decreases, while the volume of the second working chamber 1212 increases. The fluid within the first working chamber 1211 flows through the reservoir 13 into the second communicating channel 42, and then along the second communicating channel 42 to the third valve port 31. From the third valve port 31, the fluid flows into the interior of the second adjustable damping valve 3, and then from the fourth valve port 32 into the third communicating channel 43. As the fluid flows through the second adjustable damping valve 3, the second adjustable damping valve 3 controls and adjusts the damping force, thereby facilitating the use of the shock absorber 100. The fluid in the third communication channel 43 flows directly into the first communication channel 41 through the first one-way communication member 23 (for example, the first one-way communication member 23 can be a one-way valve). In other words, when the shock absorber 100 is in the restored state, the first adjustable damping valve 2 only functions as a communication channel and does not function to adjust the damping. The fluid in the first communication channel 41 then flows into the second working sub-chamber 1212. This completes the restoration process of the shock absorber 100.

[0061] Thus, through the reciprocating motion of the piston assembly 122 within the working chamber 121, the fluid can reciprocate within the first working sub-chamber 1211 and the second working sub-chamber 1212 according to the aforementioned flow process, thereby achieving the vibration damping effect of the shock absorber 100. Furthermore, the first damping adjustable valve 2 of the shock absorber 100 controls compression, while the second damping adjustable valve 3 controls recovery. The first and second damping adjustable valves 2 and 3 can be independently controlled and used without interfering with each other, and the damping force can be adjusted independently, thereby improving the performance of the shock absorber 100. It should be noted that in the above description, the first one-way conducting member 23 is disposed on the first damping adjustable valve 2. Of course, the first one-way conducting member 23 can also be disposed on the connecting member 4 to achieve one-way communication between the third connecting channel 43 and the first connecting channel 41.

[0062] According to some embodiments of the present disclosure, referring to Figures 1 and 2, a connecting piece 4 is provided on the housing 1, and the connecting piece 4 is located on the side of the second working sub-chamber 1212 away from the first working sub-chamber 1211. For example, in the examples of Figures 1 and 2, the connecting piece 4 is connected to the lower side of the housing 1, and the first damping adjustable valve 2 and the second damping adjustable valve 3 are both provided on the lower side of the housing 1 and connected to the connecting piece 4. With such an arrangement, on the one hand, the layout of the housing 1, the connecting piece 4, the first damping adjustable valve 2, and the second damping adjustable valve 3 of the shock absorber 100 is reasonable, which is conducive to the flow of fluid within the shock absorber 100 and can also reduce mutual interference between the various components. On the other hand, the housing 1 is provided above the first damping adjustable valve 2 and the second damping adjustable valve 3, and the structure within the housing 1 is simple, with a small number of components, which improves the overall stability of the shock absorber 100 and facilitates the long-term and stable use of the shock absorber 100.

[0063] Optionally, referring to Figures 1 and 2 , the housing 1 includes a first housing 11 and a second housing 12 nested from the outside inward. A liquid storage chamber 13 is defined between the first and second housings 11, 12, and a working chamber 121 is defined within the second housing 12. For example, in the example shown in Figures 1 and 2 , the second housing 12 is located radially inward of the first housing 11. The first and second housings 11, 12 can be configured as a columnar structure. Thus, the first and second housings 11, 12 separate the housing 1 into two compartments, simplifying the structure of the shock absorber 100.

[0064] According to some embodiments of the present disclosure, referring to Figures 1, 3, and 4, a mating groove 44 is formed on the connecting member 4. One end of the first connecting channel 41 and one end of the second connecting channel 42 extend through the bottom wall of the mating groove 44. The second housing 12 extends into the mating groove 44, and the sidewall of the second housing 12 separates the first and second connecting channels 41 and 42. For example, in the example of Figures 1, 3, and 4, the mating groove 44 is formed on the upper surface of the connecting member 4. The upper ends of the first and second connecting channels 41 and 42 extend through the bottom wall of the mating groove 44. The lower end of the second housing 12 extends into the mating groove 44, separating the upper ends of the first and second connecting channels 41 and 42. As a result, the first and second connecting channels 41 and 42 are disconnected from each other, facilitating smooth fluid flow and improving the reliability of the shock absorber 100. Furthermore, the mating groove 44 serves to position the lower end of the second housing 12, facilitating quick assembly of the second housing 12 with the connecting member 4.

[0065] According to some embodiments of the present disclosure, referring to Figures 3 and 4 , the sidewall of the mating groove 44 is provided with a plurality of mating protrusions 441 spaced circumferentially apart, and the sidewall of the second housing 12 engages with the inner circumference of the plurality of mating protrusions 441. In the description of this disclosure, "plurality" means two or more than two. For example, in the examples of Figures 3 and 4 , the sidewall of the mating groove 44 is provided with two mating protrusions 441, each extending circumferentially along the mating groove 44, and the outer circumferential surface of the lower portion of the second housing 12 engages with the inner circumference of the two mating protrusions 441. With this arrangement, the mating protrusions 441 act as a limiter for the lower end of the second housing 12, limiting its radial movement. Furthermore, the mating protrusions 441 guide the lower end of the second housing 12, facilitating its insertion into the mating groove 44.

[0066] 3 and 4 , an air-avoidance flow channel 442 is defined between two adjacent mating protrusions 441, and the liquid storage chamber 13 and the second communication channel 42 are connected via the air-avoidance flow channel 442. This arrangement allows the fluid flowing out of the upper end of the second communication channel 42 to flow into the liquid storage chamber 13 through the air-avoidance flow channel 442, effectively utilizing the space within the mating groove 44 on the connecting member 4 and further facilitating the flow of fluid between the connecting member 4 and the housing 1.

[0067] According to some embodiments of the present disclosure, in conjunction with Figures 1 to 4, one end of the second connecting channel 42 is located between one end of the first connecting channel 41 and the matching protrusion 441 along the radial direction of the shell 1. For example, in the examples of Figures 4 and 5, from the middle of the connecting member 4 toward the outer peripheral surface of the connecting member 4, there are: the first connecting channel 41, the second connecting channel 42, and the matching protrusion 441. With this arrangement, the layout of the first connecting channel 41, the second connecting channel 42, and the matching protrusion 441 is reasonable, and the space inside the connecting member 4 can be effectively utilized, making the design of the connecting member 4 more sophisticated and improving the performance of the connecting member 4.

[0068] According to some embodiments of the present disclosure, referring to Figures 1, 2, and 4, the first connecting channel 41 includes a first channel section 411 and a second channel section 412 that communicate with each other. The first channel section 411 extends axially along the housing 1, with its free end communicating with the second working chamber 1212. The second channel section 412 extends radially along the housing 1, with its free end communicating with the first valve port 21. For example, in the examples of Figures 1, 2, and 4, the first channel section 411 extends in the vertical direction, with its upper end penetrating the bottom wall of the mating groove 44, its lower end communicating with the right end of the second channel section 412, and the second channel section 412 extending in the horizontal direction, with its left end penetrating the outer circumferential surface of the connecting member 4 to communicate with the first valve port 21. This configuration simplifies the structure of the first connecting channel 41, facilitating the production and processing of the connecting member 4. In addition, the first channel section 411 and the second channel section 412 both extend in a straight line, which can shorten the flow path of the fluid in the first connecting channel 41, so as to facilitate the fluid to flow from the second working chamber 1212 to the first valve port 21, thereby further facilitating the use of the shock absorber 100.

[0069] Further, in combination with Figures 1, 2 and 4, the second connecting channel 42 includes a third channel section 421 and a fourth channel section 422 that are connected to each other, the third channel section 421 extends along the axial direction of the shell 1, and the free end of the third channel section 421 is connected to the liquid storage chamber 13. The third channel section 421 is spaced apart from the first channel section 411 in the axial direction perpendicular to the shell 1, and the fourth channel section 422 extends along the radial direction of the shell 1, and the free end of the fourth channel section 422 is connected to the third valve port 31 and extends in a direction away from the free end of the second channel section 412.

[0070] For example, in the examples of Figures 1, 2, and 4, the third channel section 421 extends in the vertical direction. The upper end of the third channel section 421 penetrates the bottom wall of the mating groove 44 and communicates with the liquid reservoir 13. The lower end of the third channel section 421 communicates with the left end of the fourth channel section 422. The fourth channel section 422 extends in the horizontal direction. The right end of the fourth channel section 422 penetrates the outer circumferential surface of the connecting member 4 and communicates with the third valve port 31. The fourth channel section 422 and the second channel section 412 are spaced apart radially along the connecting member 4. This arrangement simplifies the structure of the second connecting channel 42, facilitating the production and processing of the connecting member 4. Furthermore, the third channel section 421 and the fourth channel section 422 both extend in a straight line, shortening the flow path of the fluid within the second connecting channel 42, thereby facilitating the flow of fluid from the third valve port 31 to the liquid reservoir 13, thereby further facilitating the use of the shock absorber 100.

[0071] According to some embodiments of the present disclosure, with reference to Figures 1, 2, and 4, the third communication channel 43 is located on a side of the first and second communication channels 41, 42 that is away from the second working chamber 1212. For example, in the examples of Figures 1, 2, and 4, the third communication channel 43 is located below the first and second communication channels 41, 42. This arrangement optimizes the positioning of the third communication channel 43, making it less likely to interfere with the second working chamber 1212, thereby facilitating fluid flow within the connecting member 4. Furthermore, the layout of the third communication channel 43, the first and second communication channels 41, 42 is designed based on the fluid flow path, further facilitating the use of the connecting member 4.

[0072] According to some embodiments of the present disclosure, referring to Figures 1 and 2 , the first and second adjustable damping valves 2 and 3 are both connected to a connecting member 4. For example, in the examples of Figures 1 and 2 , the first and second adjustable damping valves 2 and 3 are respectively connected to the outer circumferential surface of the connecting member 4, so that the first and second adjustable damping valves 2 and 3 are respectively connected to the interior of the connecting member 4, and the first and second adjustable damping valves 2 and 3 can be connected via a third connecting channel 43, thereby facilitating smooth flow of fluid between the first and second adjustable damping valves 2 and 3. Furthermore, the flow path is shorter, resulting in smoother flow.

[0073] Optionally, in conjunction with Figures 1 and 2 , the first damping adjustable valve 2 and the second damping adjustable valve 3 are radially opposite to each other in the housing 1. For example, in the examples of Figures 1 and 2 , the first damping adjustable valve 2 and the second damping adjustable valve 3 are located on both radial sides of the connecting piece 4, and the first damping adjustable valve 2 and the second damping adjustable valve 3 are in the same horizontal direction. With this arrangement, the distance between the first damping adjustable valve 2 and the second damping adjustable valve 3 is closer, which is more conducive to the flow of fluid between the first damping adjustable valve 2 and the second damping adjustable valve 3. In addition, the overall structure of the shock absorber 100 is made more stable, thereby improving the stability of the shock absorber 100 during use.

[0074] According to some embodiments of the present disclosure, as shown in Figures 1 and 2 , the volume of the third communication channel 43 is variable. When the shock absorber 100 is operating, the volume of the third communication channel 43 changes with changes in the pressure within the third communication channel 43. For example, when the shock absorber 100 is in a compression state, the piston assembly 122 moves downward, fluid flows into the third communication channel 43, the pressure within the third communication channel 43 increases, and the volume of the third communication channel 43 increases. When the shock absorber 100 is in a recovery state, the piston assembly 122 moves upward, compressing the first working chamber 1211. The volume occupied by the piston assembly 122 within the working chamber 121 decreases, the pressure within the third communication channel 43 decreases, and the volume of the third communication channel 43 decreases. Because fluids, such as oil, are incompressible, by providing a variable volume for the third communication channel 43, the volume of the third communication channel 43 can be adjusted accordingly based on the flow of the fluid, thereby facilitating the flow of the fluid within the shock absorber 100 and thus facilitating normal operation of the shock absorber 100. It should be noted that the fluid in the housing 1 , the connecting piece 4 , the first adjustable damping valve 2 and the second adjustable damping valve 3 is only oil, and no gas exists.

[0075] According to some embodiments of the present disclosure, with reference to FIG1 and FIG2 , the shock absorber 100 further includes a gas compression device 5 , which is disposed on the connecting member 4 and contains compressed gas. The gas compression device 5 is configured to compress the compressed gas when the fluid pressure in the third connecting channel 43 increases, and to restore the compressed gas when the fluid pressure in the third connecting channel 43 decreases. For example, in the examples of FIG1 and FIG2 , the gas compression device 5 is disposed on a side of the connecting member 4 away from the housing 1 . With such a configuration, the gas compression device 5 can change, such as compressing and restoring the gas, according to changes in the pressure in the third connecting channel 43, to achieve oil-gas separation in the shock absorber 100 . That is, no gas exists at any location on the shock absorber 100 other than in the gas compression device 5 , thereby avoiding the problem of gas entering the first and second adjustable damping valves 2 and 3 and causing a transient reduction in the damping force.

[0076] According to some embodiments of the present disclosure, referring to Figures 1 and 2, a gas compression device 5 includes a housing 51 and a floating piston 52. The housing 51 is connected to a side of the connecting member 4 away from the housing 1. The housing 51 and the connecting member 4 jointly define a third connecting channel 43. The floating piston 52 is movably disposed within the housing 51. The floating piston 52 divides the third connecting channel 43 into a connecting member connecting channel 431 and a compressed gas chamber 5111. The connecting member connecting channel 431 is unidirectionally connected to the second connecting channel 42, and the connecting member connecting channel 431 is unidirectionally connected to the first connecting channel 41. Compressed gas is located in the compressed gas chamber 5111.

[0077] For example, in the example shown in Figures 1 and 2 , the upper side of the housing 51 is connected to the lower side of the connecting member 4, defining a third connecting passage 43. A floating piston 52 moves up and down within the housing 51. The outer circumference of the floating piston 52 abuts the inner wall of the housing 51, separating the connecting member connecting passage 431 from the compressed gas chamber 5111. The connecting member connecting passage 431 and the compressed gas chamber 5111 are independent of each other. The right side of the connecting member connecting passage 431 is unidirectionally connected to the second connecting passage 42 via the second one-way connecting member 33, while the left side of the connecting member connecting passage 431 is unidirectionally connected to the first connecting passage 41 via the first one-way connecting member 23. When the pressure within the connecting member connecting passage 431 increases, the floating piston 52 moves downward, compressing the compressed gas. When the pressure within the connecting member connecting passage 431 decreases, the pressure within the compressed gas chamber 5111 becomes greater than the pressure within the third connecting passage 43, causing the floating piston 52 to move upward, restoring the compressed gas within the compressed gas chamber 5111. Thus, through the combined action of the housing 51 and the floating piston 52, oil and gas separation within the shock absorber 100 is effectively achieved while ensuring normal fluid flow, thereby facilitating the adjustment and control of the damping force by the first and second adjustable damping valves 2 and 3. Furthermore, the housing 51 and the floating piston 52 have a simple structure and low operating cost, thereby reducing the difficulty and cost of manufacturing the shock absorber 100.

[0078] For example, the communication between the compressed gas chamber 5111 and the outside of the housing 51 includes at least the following three methods: First, an air filling nozzle 512 is provided at the bottom of the housing 51. The shock absorber 100 can pre-fill the compressed gas chamber 5111 with gas at a certain pressure through the air filling nozzle 512 according to the designed pressure, or can also discharge the gas in the compressed gas chamber 5111 through the air filling nozzle 512, thereby adjusting the initial pressure in the compressed gas chamber 5111. Second, the compressed gas chamber 5111 can be directly connected to the external atmosphere. When the pressure in the connecting passage 431 of the connecting piece increases, the compressed gas chamber 5111 is compressed to discharge the gas in the compressed gas chamber 5111. When the pressure in the connecting passage 431 of the connecting piece decreases, the external atmosphere flows into the compressed gas chamber 5111. Third, the compressed gas chamber 5111 is a closed space containing compressed gas. Thus, different methods can be used to respectively realize that the volume of the connecting passage 431 of the connecting member can be changed according to the flow conditions of the fluid, so as to facilitate the flow of the fluid in the shock absorber 100, thereby facilitating the normal operation of the shock absorber 100. According to some embodiments of the present disclosure, the gas compression device 5 can be configured as an accumulator, an air bag or a bellows, but is not limited thereto. With such a configuration, by utilizing the changeable capacity of the accumulator, the air bag or the bellows after being subjected to pressure, the volume of the third connecting passage 43 can be made variable, thereby achieving oil and gas separation in the shock absorber 100. In addition, the selectivity of the gas compression device 5 is enriched, thereby enriching the structure of the shock absorber 100 and improving the performance of the shock absorber 100.

[0079] According to some embodiments of the present disclosure, referring to Figures 1, 2 and 7, at least one through hole 123 is formed on the shell 1, and the liquid storage chamber 13 and the first working sub-chamber 1211 are connected through the through hole 123. For example, in the examples of Figures 1 and 7, the through hole 123 can be formed on the second shell 12, and the through hole 123 passes through the outer peripheral surface and the inner wall surface of the second shell 12 along the radial direction of the second shell 12, and the shape of the through hole 123 can be set to be circular. Such a setting is conducive to the flow of fluid between the first working sub-chamber 1211 and the liquid storage chamber 13, so as to be more conducive to the flow of fluid in the shock absorber 100. It should be noted that the through hole 123 can also be set to other shapes according to needs to better meet practical applications.

[0080] Optionally, referring to FIG7 , there are multiple through-holes 123, with at least two of the multiple through-holes 123 being staggered along both the circumferential and axial directions of the working chamber 121. For example, in the example of FIG7 , there are four through-holes 123, which are spaced apart along the circumference of the second shell 12, and at least two of the four through-holes 123 are not located at the same height on the second shell 12. Compared to having multiple through-holes 123 located at the same height on the second shell 12, this arrangement effectively prevents deformation of the sidewalls of the second shell 12 due to fluid pressure when the fluid flows through the multiple through-holes 123, thereby improving the structural strength of the second shell 12 and extending its service life.

[0081] According to some embodiments of the present disclosure, through-hole 123 is located on a side of the piston assembly 122, away from the second working sub-chamber 1212, at the maximum stroke position when the piston assembly 122 compresses the first working sub-chamber 1211. That is, when the piston assembly 122 moves upward to compress the first working sub-chamber 1211, the highest position of the piston assembly 122 within the second housing 12 is lower than the position of the through-hole 123 on the second housing 12. This ensures that during the reciprocating motion of the piston assembly 122, the first working sub-chamber 1211 is always connected to the liquid storage chamber 13 via the through-hole 123. This ensures that when the shock absorber 100 is in the restored state, oil can flow smoothly from the first working sub-chamber 1211 through the through-hole 123 into the liquid storage chamber 13, while also preventing the through-hole 123 from damaging the piston valve sealant on the piston assembly 122.

[0082] A suspension system 1000 according to an embodiment of the second aspect of the present disclosure, as shown in FIG10 , includes the shock absorber 100 according to the embodiment of the first aspect.

[0083] According to the suspension system 1000 of the second embodiment of the present disclosure, by adopting the above-mentioned shock absorber 100, the vibration reduction performance is good, thereby improving the performance of the suspension system 1000.

[0084] The vehicle 2000 according to the third aspect of the present disclosure includes the shock absorber 100 according to the first aspect (as shown in FIG. 11 ) or the suspension system 1000 according to the second aspect (as shown in FIG. 12 ).

[0085] According to the vehicle 2000 of the third embodiment of the present disclosure, by adopting the above-mentioned shock absorber 100 or suspension system 1000, the driving comfort of the vehicle 2000 is improved and the performance of the vehicle 2000 is improved.

[0086] Other structures and operations of the shock absorber 100 , the suspension system 1000 , and the vehicle 2000 according to the embodiment of the present disclosure are well known to those skilled in the art and will not be described in detail herein.

[0087] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0088] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0089] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A shock absorber (100), characterized in that, Comprising: A housing (1), a liquid storage chamber (13) and a working chamber (121) are defined inside the housing (1), and the working chamber (121) is located radially inside the liquid storage chamber (13); A piston assembly (122), the piston assembly (122) is movably arranged inside the working chamber (121), the piston assembly (122) divides the working chamber (121) into a first working sub-chamber (1211) and a second working sub-chamber (1212), and the first working sub-chamber (1211) communicates with the liquid storage chamber (13); A first damping adjustable valve (2), the first damping adjustable valve (2) has a first valve port (21) and a second valve port (22), and the first damping adjustable valve (2) is used to adjust the flow damping between the first valve port (21) and the second valve port (22); A second damping adjustable valve (3), the second damping adjustable valve (3) has a third valve port (31) and a fourth valve port (32), and the second damping adjustable valve (3) is used to adjust the flow damping between the third valve port (31) and the fourth valve port (32); And A connecting member (4), a first connecting channel (41), a second connecting channel (42) and a third connecting channel (43) are formed on the connecting member (4), the first connecting channel (41) communicates the second working sub-chamber (1212) and the first valve port (21), the second connecting channel (42) communicates the liquid storage chamber (13) and the third valve port (31), the third connecting channel (43) communicates the second valve port (22) and the fourth valve port (32), and the third connecting channel (43) is unidirectionally communicated to the second connecting channel (42), and the third connecting channel (43) is unidirectionally communicated to the first connecting channel (41).

2. The shock absorber (100) according to claim 1, characterized in that, A first one-way conduction member (23) is provided between the connecting member (4) and the first damping adjustable valve (2), a second one-way conduction member (33) is provided between the connecting member (4) and the second damping adjustable valve (3), and the shock absorber (100) has a compression state and a recovery state. When the shock absorber (100) is in the compression state, the piston assembly (122) compresses the second working sub-chamber (1212), the fluid in the second working sub-chamber (1212) flows through the first connecting channel (41) to the first valve port (21), then flows through the inside of the first damping adjustable valve (2) from the second valve port (22) to the third connecting channel (43), then enters the second connecting channel (42) through the second one-way conduction member (33), and finally flows into the first working sub-chamber (1211) through the liquid storage chamber (13); When the shock absorber (100) is in the rebound state, the piston assembly (122) compresses the first working subchamber (1211), and the fluid in the first working subchamber (1211) flows through the liquid storage chamber (13) and the second communication channel (42) to the third valve port (31), then flows through the inside of the second damping adjustable valve (3) from the fourth valve port (32) to the third communication channel (43), and then enters the first communication channel (41) through the first one-way conduction member (23) and flows into the second working subchamber (1212).

3. The shock absorber (100) according to claim 1 or 2, characterized in that, The communication member (4) is arranged on the housing (1), and the communication member (4) is located on the side of the second working subchamber (1212) away from the first working subchamber (1211).

4. The shock absorber (100) according to any one of claims 1-3, characterized in that, The housing (1) includes a first housing (11) and a second housing (12) nested with each other from outside to inside in sequence. The liquid storage chamber (13) is defined between the first housing (11) and the second housing (12), and the working chamber (121) is defined inside the second housing (12).

5. The shock absorber (100) according to claim 4, characterized in that, A fitting groove (44) is formed on the communication member (4). One end of the first communication channel (41) and one end of the second communication channel (42) penetrate the bottom wall of the fitting groove (44). The second housing (12) extends into the fitting groove (44), and the side wall of the second housing (12) separates the one end of the first communication channel (41) and the one end of the second communication channel (42).

6. The shock absorber (100) according to claim 5, characterized in that, A plurality of fitting protrusions (441) are circumferentially and spacedly arranged on the side wall of the fitting groove (44), and the side wall of the second housing (12) is fitted on the inner circumferential side of the plurality of fitting protrusions (441). An avoidance flow channel (442) is defined between two adjacent fitting protrusions (441), and the liquid storage chamber (13) and the second communication channel (42) are communicated through the avoidance flow channel (442).

7. The shock absorber (100) according to claim 6, characterized in that, The one end of the second communication channel (42) is located between the one end of the first communication channel (41) and the fitting protrusion (441) along the radial direction of the housing (1).

8. The shock absorber (100) according to any one of claims 1-7, characterized in that, The first communication channel (41) includes a first channel section (411) and a second channel section (412) communicated with each other. The first channel section (411) extends along the axial direction of the housing (1), the free end of the first channel section (411) is communicated with the second working subchamber (1212), the second channel section (412) extends along the radial direction of the housing (1), and the free end of the second channel section (412) is communicated with the first valve port (21).

9. The shock absorber (100) according to claim 8, characterized in that, The second communication channel (42) includes a third channel section (421) and a fourth channel section (422) that communicate with each other. The third channel section (421) extends along the axial direction of the housing (1). The free end of the third channel section (421) communicates with the liquid storage cavity (13). The third channel section (421) is spaced apart from the first channel section (411) in a direction perpendicular to the axis of the housing (1). The fourth channel section (422) extends along the radial direction of the housing (1). The free end of the fourth channel section (422) communicates with the third valve port (31) and extends in a direction away from the free end of the second channel section (412).

10. The shock absorber (100) according to any one of claims 1-9, characterized in that, The third communication channel (43) is located on a side of the first communication channel (41) and the second communication channel (42) that is away from the second working sub-cavity (1212).

11. The shock absorber (100) according to any one of claims 1-10, characterized in that, Both the first damping adjustable valve (2) and the second damping adjustable valve (3) are connected to the connecting member (4).

12. The shock absorber (100) according to any one of claims 1-11, characterized in that, The first damping adjustable valve (2) and the second damping adjustable valve (3) are opposite to each other along the radial direction of the housing (1).

13. The shock absorber (100) according to any one of claims 1-12, characterized in that, The volume of the third communication channel (43) is variable, When the shock absorber (100) is working, the volume of the third communication channel (43) changes with the change of the pressure in the third communication channel (43).

14. The shock absorber (100) according to any one of claims 1-13, characterized in that, Further comprising: A gas compression device (5), the gas compression device (5) is provided on the connecting member (4). The gas compression device (5) contains compressed gas. The gas compression device (5) is configured such that when the fluid pressure in the third communication channel (43) increases, the compressed gas is compressed, and when the fluid pressure in the third communication channel (43) decreases, the compressed gas returns to its original state.

15. The shock absorber (100) according to claim 14, characterized in that, The gas compression device (5) includes: A housing (51), the housing (51) is connected to a side of the connecting member (4) that is away from the housing (1). The housing (51) and the connecting member (4) jointly define the third communication channel (43); and A floating piston (52), the floating piston (52) is movably provided in the housing (51). The floating piston (52) divides the third communication channel (43) into a connecting member communication channel (431) and a compressed gas cavity (5111). The connecting member communication channel (431) is unidirectionally connected to the second communication channel (42), the connecting member communication channel (431) is unidirectionally connected to the first communication channel (41), and the compressed gas is located in the compressed gas cavity (5111).

16. The shock absorber (100) according to claim 14 or 15, characterized in that, The gas compression device (5) is an accumulator, an air bag or a bellows.

17. The shock absorber (100) according to any one of claims 1-16, characterized in that, At least one through hole (123) is formed on the housing (1). The liquid storage cavity (13) and the first working sub-cavity (1211) communicate through the through hole (123).

18. The shock absorber (100) according to claim 17, characterized in that, There are multiple through holes (123). At least two of the multiple through holes (123) are staggered both in the circumferential direction and the axial direction of the working cavity (121).

19. The shock absorber (100) according to claim 17 or 18, characterized in that, The through hole (123) is located on a side away from the second working subchamber (1212) at the maximum stroke position when the piston assembly (122) compresses the first working subchamber (1211).

20. A suspension system (1000), characterized in that, Comprising a shock absorber (100) according to any one of claims 1-19.

21. A vehicle (2000), characterized in that, Comprising a shock absorber (100) according to any one of claims 1-19, or a suspension system (1000) according to claim 20.

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