Vehicle shock absorber

Abstract

The invention relates to the technical field of vehicle shock absorption, in particular to a vehicle shock absorber. A vehicle shock absorber includes a cylinder assembly, a piston rod assembly, and a valve assembly. The cylinder body assembly comprises a working cylinder unit, a middle cylinder unit and a damping cylinder unit. The intermediate cylinder unit includes a recovery intermediate chamber and a compression intermediate chamber. An inner cavity of the damper cylinder body comprises a storage cavity. The working cylinder body is provided with a recovery overflow hole and a compression overflow hole. The piston rod assembly divides an inner cavity of the working cylinder body into a first working cavity and a second working cavity. The first working cavity is communicated with the recovery middle cavity through the recovery overflow hole, and the second working cavity is communicated with the compression middle cavity through the compression overflow hole. The valve assembly includes a first regulating valve and a second regulating valve. And the recovery middle cavity and the compression middle cavity are respectively communicated with the storage cavity through a first regulating valve and a second regulating valve. And the first adjusting valve and the second adjusting valve can adjust the oil circulation pressure. Therefore, the problem that the damping adjusting range of the vehicle shock absorber is insufficient is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to a vehicle shock absorber. Background Art

[0002] Semi-active electronically controlled shock absorbers are mainly composed of shock absorber cylinders, pistons, piston rods and other components. The shock absorber cylinder is filled with shock absorber oil, and the piston moves up and down in the shock absorber cylinder. When the vehicle encounters bumps on the road during driving, the up and down movement of the wheel is transmitted to the shock absorber piston rod through the suspension system, and the piston rod drives the piston to move in the shock absorber cylinder. There are small holes or valves on the piston, and the shock absorber oil flows through these channels between different chambers of the shock absorber cylinder when the piston moves, thereby generating damping force and reducing the vibration of the vehicle.

[0003] Semi-active electronically controlled shock absorbers can adjust the damping coefficient in real time according to the vehicle's driving conditions and road conditions. When driving on flat roads, semi-active electronically controlled shock absorbers can reduce the damping force to improve ride comfort; when driving on rough roads or at high speeds, they can increase the damping force to enhance the vehicle's handling.

[0004] However, the existing semi-active electronically controlled shock absorbers on the market have a small damping adjustment range and cannot meet the current vehicle's increasing demand for vehicle weight, as well as the demands for handling, comfort and safety. Summary of the invention

[0005] In order to solve the problem that the damping adjustment range of a vehicle shock absorber is insufficient, the present invention provides a vehicle shock absorber, comprising: A cylinder assembly, the cylinder assembly comprising a working cylinder unit, an intermediate cylinder unit and a shock-absorbing cylinder unit; the working cylinder unit comprising a working cylinder body; the intermediate cylinder unit comprising an intermediate cylinder assembly; the working cylinder body is located inside the intermediate cylinder assembly; the shock-absorbing cylinder unit comprises a shock-absorbing cylinder body; the intermediate cylinder assembly is located inside the shock-absorbing cylinder body; the working cylinder body, the intermediate cylinder assembly and the shock-absorbing cylinder body are coaxial; the inner cavity of the intermediate cylinder assembly comprises a restoring intermediate cavity and a compression intermediate cavity isolated from each other; the restoring intermediate cavity and the compression intermediate cavity are located outside the working cylinder body; the inner cavity of the shock-absorbing cylinder body comprises a storage cavity; the storage cavity is located outside the working cylinder body and the intermediate cylinder assembly; the working cylinder body is provided with a restoring overflow hole and a compression overflow hole; A piston rod assembly, the piston rod assembly comprising a connecting rod, a piston and a spring; the piston is detachably connected to the connecting rod; the outer diameter of the piston is larger than the diameter of the connecting rod; the connecting rod, the piston and the working cylinder body are coaxial; the connecting rod and the piston are located inside the working cylinder unit; the piston is slidably fitted with the inner wall of the working cylinder unit; the piston divides the inner cavity of the working cylinder body into a first working cavity and a second working cavity; the first working cavity is connected to the restoring intermediate cavity through the restoring overflow hole; the second working cavity is connected to the compression intermediate cavity through the compression overflow hole; A valve assembly, the valve assembly comprising a first regulating valve and a second regulating valve; the first regulating valve is detachably connected to the intermediate cylinder assembly and the shock absorber cylinder respectively; the second regulating valve is detachably connected to the intermediate cylinder assembly and the shock absorber cylinder respectively; the recovery intermediate chamber is connected to the storage chamber through the first regulating valve; the compression intermediate chamber is connected to the storage chamber through the second regulating valve, and the first regulating valve and the second regulating valve can adjust the pressure of the oil circulation.

[0006] In some embodiments, the valve assembly further includes a one-way valve; the storage chamber is connected to the restoration intermediate chamber through the one-way valve; the one-way valve unidirectionally directs the oil path from the storage chamber to the restoration intermediate chamber.

[0007] In some embodiments, the one-way valve is located in the first regulating valve; the one-way valve includes a valve cover, a spring valve plate, a gasket and a valve seat; the valve cover has a first flow port, and the valve seat has a second flow port and a third flow port; the spring valve plate is annular; the valve cover and the valve seat are distributed at opposite ends of the one-way valve; the first flow port and the second flow port are connected and pass through the one-way valve through the spring valve plate and the center hole of the gasket; the third flow port is located on the side wall of the valve seat; the spring valve plate relies on elastic force to block the third flow port in a natural state; the spring valve plate unidirectionally guides the oil path from the third flow port to the inner cavity of the valve seat; the first regulating valve is connected to the recovery intermediate cavity through the second flow port of the one-way valve, the center hole of the spring valve plate and the first flow port in sequence.

[0008] In some embodiments, the valve assembly further includes a compression valve; the compression valve is detachably connected to the working cylinder body; and the second working chamber is connected to the storage chamber through the compression valve.

[0009] In some embodiments, the compression valve is disposed in the second working chamber at an end away from the piston rod assembly.

[0010] In some embodiments, the end of the intermediate cylinder assembly close to the restoration middle chamber is the first end; the end of the intermediate cylinder assembly close to the compression middle chamber is the second end; the end of the shock absorber cylinder body close to the restoration middle chamber is the third end; the end of the shock absorber cylinder body close to the restoration middle chamber is the fourth end; the axial distance between the first end and the third end is greater than the axial distance between the second end and the fourth end; The third end is detachably connected with a sealing ring; the sealing ring is detachably connected to the working cylinder body; the sealing ring seals the third end; the connecting rod is slidably inserted into the center hole of the sealing ring; The fourth end is detachably connected with a sealing cover; the sealing cover seals the fourth end.

[0011] In some embodiments, the intermediate cylinder assembly includes multiple sections of cylinder barrels and partition sealing rings; the multiple sections of cylinder barrels are detachably connected in sequence; the partition sealing ring divides the inner cavity of the intermediate cylinder assembly into the recovery intermediate cavity and the compression intermediate cavity; the inner side of the partition sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the intermediate cylinder assembly; both ends of the intermediate cylinder assembly have sealing structures connected to the working cylinder body.

[0012] In some embodiments, the intermediate cylinder assembly includes a first intermediate cylinder, a second intermediate cylinder, a third intermediate cylinder, a partition sealing ring, a first sealing ring and a second sealing ring; one end of the second intermediate cylinder is fixedly connected to the first intermediate cylinder, and the other end is fixedly connected to the third intermediate cylinder; the inner side of the partition sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the second intermediate cylinder; the inner side of the first sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the first intermediate cylinder; the inner side of the second sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the third intermediate cylinder; the recovery intermediate chamber is between the first sealing ring and the partition sealing ring; the compression intermediate chamber is between the partition sealing ring and the second sealing ring.

[0013] In some embodiments, one end of the second intermediate cylinder is threadedly connected to the first intermediate cylinder, and the other end is threadedly connected to the third intermediate cylinder; Alternatively, one end of the second intermediate cylinder is welded to the first intermediate cylinder, and the other end is welded to the third intermediate cylinder.

[0014] In some embodiments, the axis of the first regulating valve and the axis of the second regulating valve are respectively perpendicular to the axis of the cylinder assembly; and the angle between the axis of the first regulating valve and the axis of the second regulating valve is less than 180°.

[0015] In order to solve the problem of insufficient damping adjustment range of vehicle shock absorbers, the present invention has the following advantages: In order to increase the damping adjustment range, a double regulating valve consisting of a first regulating valve and a second regulating valve is used, and the shock absorber is divided into three cylinders accordingly, and the middle chamber is divided into a restoring middle chamber and a compression middle chamber, and the two chambers are connected to the first regulating valve and the second regulating valve respectively. Compared with the traditional semi-active electronically controlled shock absorber that uses a solenoid valve to simultaneously control the compression damping force and the restoring damping force, the vehicle shock absorber of the present invention uses the first regulating valve to control the restoring damping force and the second regulating valve to control the compression damping force, which expands the variable range of the compression damping force and provides satisfactory handling, comfort and safety for vehicles of different weights under different road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a vehicle shock absorber according to an embodiment is shown; Figure 2 Shows Figure 1 A schematic top view of a vehicle shock absorber in the illustrated embodiment; Figure 3 Shows Figure 2 A schematic cross-sectional view of the vehicle shock absorber along the AA line in the illustrated embodiment; Figure 4 Shows Figure 1 A schematic cross-sectional view of the intermediate cylinder unit in the illustrated embodiment; Figure 5 Shows Figure 1 An exploded schematic diagram of a one-way valve in the illustrated embodiment.

[0017] Figure numerals: 10 cylinder assembly; 11 working cylinder unit; 111 working cylinder body; 112 first working chamber; 113 second working chamber; 114 recovery overflow hole; 115 compression overflow hole; 12 intermediate cylinder unit; 121 intermediate cylinder assembly; 1211 first intermediate cylinder; 1212 second intermediate cylinder; 1213 third intermediate cylinder; 1214 partition sealing ring; 1215 first sealing ring; 1216 second sealing ring; 122 recovery intermediate chamber; 123 compression intermediate chamber; 13 damping cylinder unit ; 131 shock absorber body; 132 storage chamber; 133 guide block; 134 sealing ring; 135 sealing cover; 20 piston rod assembly; 21 connecting rod; 22 piston; 23 spring; 24 first limiting ring; 25 second limiting ring; 30 valve assembly; 31 compression valve; 32 first regulating valve; 33 second regulating valve; 34 one-way valve; 341 valve cover; 3411 first flow port; 342 spring valve plate; 343 gasket; 344 valve seat; 3441 second flow port; 3442 third flow port. DETAILED DESCRIPTION

[0018] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0019] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0020] Traditional electronically controlled shock absorbers only have one solenoid valve, which needs to control the circulation of oil between the intermediate chamber and the storage chamber. By controlling the flow rate, the damping force can be controlled. However, with the development of vehicles, a single solenoid valve can no longer meet the damping adjustment needs of heavier vehicles on rough roads and at high speeds, as well as the needs for vehicle handling, comfort and safety.

[0021] In this embodiment, a vehicle shock absorber is provided, such as Figure 1 and Figure 3As shown, the vehicle shock absorber includes a cylinder assembly 10, a piston 22 rod assembly 20 and a valve assembly 30. The cylinder assembly 10 may include a working cylinder unit 11, an intermediate cylinder unit 12 and a shock absorber cylinder unit 13. The working cylinder unit 11 includes a working cylinder body 111. The intermediate cylinder unit 12 includes an intermediate cylinder assembly 121, and the working cylinder body 111 is located inside the intermediate cylinder assembly 121. The shock absorber cylinder unit 13 includes a shock absorber cylinder body 131, and the intermediate cylinder assembly 121 is located inside the shock absorber cylinder body 131. The working cylinder body 111, the intermediate cylinder assembly 121 and the shock absorber cylinder body 131 are coaxial. The inner cavity of the intermediate cylinder assembly 121 includes a restoring intermediate cavity 122 and a compression intermediate cavity 123 that are isolated from each other, and the restoring intermediate cavity 122 and the compression intermediate cavity 123 are located outside the working cylinder body 111. The inner cavity of the shock-absorbing cylinder body 131 includes a storage cavity 132, and the storage cavity 132 is located outside the working cylinder body 111 and the intermediate cylinder assembly 121. The working cylinder body 111 has a recovery overflow hole 114 and a compression overflow hole 115.

[0022] The piston 22 rod assembly 20 may include a connecting rod 21, a piston 22 and a spring 23. The piston 22 is detachably connected to the connecting rod 21, the outer diameter of the piston 22 is larger than the diameter of the connecting rod 21, and the connecting rod 21, the piston 22 and the working cylinder body 111 are coaxial. The connecting rod 21 and the piston 22 are located inside the working cylinder unit 11, and the piston 22 is slidably fitted with the inner wall of the working cylinder unit 11. The piston 22 divides the inner cavity of the working cylinder body 111 into a first working cavity 112 and a second working cavity 113. The first working cavity 112 is connected to the restoring intermediate cavity 122 through the restoring overflow hole 114, and the second working cavity 113 is connected to the compression intermediate cavity 123 through the compression overflow hole 115.

[0023] The valve assembly 30 may include a first regulating valve 32 and a second regulating valve 33. The first regulating valve 32 and the second regulating valve 33 may be solenoid valves, respectively. The first regulating valve 32 is detachably connected to the intermediate cylinder assembly 121 and the shock absorber cylinder, respectively; the second regulating valve 33 is detachably connected to the intermediate cylinder assembly 121 and the shock absorber cylinder, respectively. The recovery intermediate chamber 122 is connected to the storage chamber 132 through the first regulating valve 32, and the compression intermediate chamber 123 is connected to the storage chamber 132 through the second regulating valve 33. The first regulating valve 32 and the second regulating valve 33 can adjust the pressure of the oil circulation. When the piston 22 slides toward the recovery overflow hole 114 inside the working cylinder unit 11, the connecting rod 21 extends, the spring 23 stretches, and the oil can flow from the first working chamber 112 into the recovery intermediate chamber 122 through the recovery overflow hole 114, and then enter the storage chamber 132 through the first regulating valve 32. At the same time, the oil in the storage chamber 132 can enter the compression intermediate chamber 123 through the second regulating valve 33, and then replenish the oil from the compression intermediate chamber 123 into the second working chamber through the compression overflow hole 115. chamber 113; when the piston 22 slides toward the compression overflow hole 115, the connecting rod 21 performs a compression action, the spring 23 is compressed, and the oil can flow from the second working chamber 113 into the compression intermediate chamber 123 through the compression overflow hole 115, and then enter the storage chamber 132 through the second regulating valve 33. At the same time, the oil in the storage chamber 132 can enter the recovery intermediate chamber 122 through the first regulating valve 32, and then be replenished into the first working chamber 112 from the recovery intermediate chamber 122 through the recovery overflow hole 114.

[0024] During the circulation of the oil, the first regulating valve 32 and the second regulating valve 33 can be controlled simultaneously to adjust the flow rate of the hydraulic oil. Compared with the single valve solution, the two valves respectively control the inflow and outflow of the hydraulic oil, which can greatly increase the power of the hydraulic system, thereby expanding the active adjustment range of the damping, and realizing active control of the damping force according to different occasions, timely consuming vibration energy, and thus ensuring the stability of the vehicle operation.

[0025] In other embodiments, the piston 22 has a first oil circuit and a second oil circuit that connect the first working chamber 112 and the second working chamber 113; the piston 22 is detachably connected with a first elastic valve plate and a second elastic valve plate; the first elastic valve plate performs one-way conduction when the oil flows from the first working chamber 112 to the second working chamber 113; the second elastic valve plate performs one-way conduction when the oil flows from the second working chamber 113 to the first working chamber 112. That is, when the connecting rod 21 is extended, the oil in the first working chamber 112 can also push the first elastic valve plate to open through the first oil circuit, so as to achieve the oil discharge of the first working chamber 112 and the oil replenishment of the second working chamber 113. By designing the damping force of the first elastic valve plate to cooperate with the opening of the first regulating valve 32, the magnitude of the restoring damping force when the connecting rod 21 is extended can be adjusted. When the connecting rod 21 is compressed, the oil in the second working chamber 113 can also push the second elastic valve plate to open through the second oil circuit, so as to achieve the oil discharge of the second working chamber 113 and the oil replenishment of the first working chamber 112. By designing the damping force of the second elastic valve sheet to cooperate with the opening of the second regulating valve 33 , the magnitude of the compression damping force when the connecting rod 21 is compressed can be adjusted.

[0026] Furthermore, in other embodiments, the resistance of the first elastic valve plate is greater than the resistance of the second elastic valve plate, which can help to quickly replenish the oil from the second working chamber 113 to the first working chamber 112 when the shock absorber is in the extended state, thereby avoiding idle travel in the first working chamber 112 due to insufficient oil.

[0027] In this embodiment, if Figure 3 As shown, the valve assembly 30 may also include a one-way valve 34. The storage chamber 132 is connected to the recovery intermediate chamber 122 through the one-way valve 34, and the one-way valve 34 unidirectionally guides the oil path from the storage chamber 132 to the recovery intermediate chamber 122. Therefore, when the piston 22 slides toward the compression overflow hole 115, the oil can directly flow from the storage chamber 132 through the recovery intermediate chamber 122 to the first working chamber 112 through the one-way valve 34, without the need to actively control the first regulating valve 32, reducing the operation requirements of the first regulating valve 32, and thus simplifying the active regulation procedure. The first regulating valve 32 only needs to control the opening of the oil flowing from the recovery intermediate chamber 122 into the storage chamber 132 to achieve the purpose of controlling the recovery damping force, simplifying the control process of the oil circulation, and improving the orderliness of the oil circulation.

[0028] In this embodiment, if Figure 3 As shown, the one-way valve 34 is located in the first regulating valve 32. Figure 5As shown, the one-way valve 34 includes a valve cover 341, a spring 23 valve plate, a gasket 343 and a valve seat 344. The valve cover 341 has a first flow port 3411, and the valve seat 344 has a second flow port 3441 and a third flow port 3442. The spring 23 valve plate is annular. The valve cover 341 and the valve seat 344 are distributed at opposite ends of the one-way valve 34, and the first flow port 3411 and the second flow port 3441 are connected through the spring 23 valve plate and the center hole of the gasket 343 and penetrate the one-way valve 34. The third flow port 3442 is located on the side wall of the valve seat 344. The spring 23 valve plate blocks the third flow port 3442 by elastic force in the natural state, and the spring 23 valve plate unilaterally guides the oil path from the third flow port 3442 to the inner cavity of the valve seat. The first regulating valve 32 is connected to the recovery middle chamber 122 through the second flow port 3441 of the one-way valve 34, the center hole of the valve plate of the spring 23, the center hole of the gasket 343 and the first flow port 3411 in sequence. When the piston 22 slides toward the recovery overflow hole 114, the oil can flow from the first working chamber 112 into the recovery middle chamber 122 through the recovery overflow hole 114, then enter the first regulating valve 32 through the one-way valve 34, and finally enter the storage chamber 132 through the first regulating valve 32. In this process, there is no resistance from the one-way valve 34. When the piston 22 slides toward the compression overflow hole 115, the oil in the second working chamber 113 can flow to the storage chamber 132 through the compression overflow hole 115 and the second regulating valve 33, and the oil in the storage chamber 132 can push open the valve plate of the spring 23 through the one-way valve 34 and flow into the recovery middle chamber 122 through the third flow port 3442. In this process, the one-way valve 34 provides a certain resistance. Through the structural design of the one-way valve 34, the one-way valve 34 can be integrated into the first regulating valve 32, which saves space, optimizes the structure and assembly method, and ensures the orderly flow of oil.

[0029] In this embodiment, if Figure 3As shown, the valve assembly 30 further includes a compression valve 31, which is detachably connected to the working cylinder body 111, and the second working chamber 113 can be connected to the storage chamber 132 through the compression valve 31. When the piston 22 slides toward the recovery overflow hole 114, the connecting rod 21 is in an extension action, and the oil in the first working chamber 112 can flow into the storage chamber 132 through the recovery overflow hole 114 and the first regulating valve 32 in sequence, and the oil in the storage chamber 132 can directly enter the second working chamber 113 through the compression valve 31. At this time, the resistance of the compression valve 31 is small, which is convenient for replenishing the oil in the second working chamber 113; in addition, when the piston 22 slides toward the compression overflow hole 115, the connecting rod 21 is in a compression action, and a part of the oil in the compression intermediate chamber 123 can be directly discharged into the storage chamber 132 through the compression valve 31. At this time, the resistance of the compression valve 31 is large, and a part of it can be discharged into the storage chamber 132 through the compression overflow hole 115 and the second regulating valve 33 in sequence. The compression valve 31 has an initial compression damping force. The compression valve 31 can cooperate with the second regulating valve 33 to flexibly adjust the damping force difference between oil replenishment and oil discharge in the second working chamber 113, thereby reducing the dependence of the second working chamber 113 oil replenishment on the active regulation of the second regulating valve 33 when the connecting rod 21 is extending, thereby further simplifying the program control of the valve assembly 30, reducing costs, and improving the orderliness of oil flow.

[0030] In this embodiment, if Figure 3 As shown, the compression valve 31 can be disposed in the second working chamber 113 at one end away from the piston 22 and the rod assembly 20 , thereby saving space around the shock absorber and facilitating the exchange of liquid between the second working chamber 113 and the storage chamber 132 .

[0031] In this embodiment, if Figure 3 As shown, the end of the intermediate cylinder assembly 121 close to the recovery intermediate chamber 122 is the first end, and the end of the intermediate cylinder assembly 121 close to the compression intermediate chamber 123 is the second end. The end of the shock absorber cylinder body 131 close to the recovery intermediate chamber 122 is the third end, and the end of the shock absorber cylinder body 131 close to the recovery intermediate chamber 122 is the fourth end. The axial spacing between the first end and the third end is greater than the axial spacing between the second end and the fourth end. The compression valve 31 can be installed between the second end and the fourth end, so that the space inside the shock absorber can be used to the maximum extent. The space between the first end and the third end is long, which is convenient for injecting oil and nitrogen. On bumpy roads or frequent acceleration, deceleration, and steering, the shock absorber oil will be frequently impacted. When the shock absorber is working, the shock absorber oil will be violently stirred and compressed under the rapid movement of the piston 22, and the shock absorber oil is prone to foam. Because the foamy shock absorber oil cannot effectively transmit pressure, it will cause the damping force of the shock absorber to be unstable. Filling with nitrogen can provide a stable pressure environment for the shock absorber oil, reduce the generation of foam, and optimize the performance of the shock absorber.

[0032] The third end is detachably connected with a sealing ring 134, and the sealing ring 134 is detachably connected to the working cylinder body 111. The sealing ring 134 seals the third end. The connecting rod 21 slides through the center hole of the sealing ring 134, and the sealing ring 134 can guide the connecting rod 21. The detachable connection design of the sealing ring 134 facilitates the injection of oil and nitrogen.

[0033] The fourth end is detachably connected with a sealing cover 135, and the sealing cover 135 seals the fourth end. The detachable connection of the sealing cover 135 facilitates the assembly of the compression valve 31 and also reasonably utilizes the space.

[0034] In this embodiment, the intermediate cylinder assembly 121 may include a multi-section cylinder and a partition seal 1214. The multi-section cylinder is detachably connected in sequence. The partition seal 1214 can separate the inner cavity of the intermediate cylinder assembly 121 into a recovery intermediate cavity 122 and a compression intermediate cavity 123. The inner side of the partition seal 1214 is interference fit with the working cylinder body 111, and the outer side is interference fit with the intermediate cylinder assembly 121. The multi-section cylinder can be installed from both ends of the shock absorber, which is more convenient than a single section, and avoids the sealing structure at both ends of the intermediate cylinder assembly 121 from being scratched by the recovery overflow hole 114 and the compression overflow hole 115, thereby ensuring the performance of the sealing structure. The first regulating valve 32 and the second regulating valve 33 are installed on both sides of the partition seal 1214. When there is only one partition seal 1214, the distance between the first regulating valve 32 and the second regulating valve 33 can be shortened to the greatest extent, thereby reducing the space required for installing the shock absorber.

[0035] In this embodiment, if Figure 4As shown, the intermediate cylinder assembly 121 may include a first intermediate cylinder 1211, a second intermediate cylinder 1212, a third intermediate cylinder 1213, a partition seal ring 1214, a first seal ring 1215, and a second seal ring 1216. The first intermediate cylinder 1211 is arranged near the seal ring 134, and the third intermediate cylinder 1213 is arranged near the seal cover 135. One end of the second intermediate cylinder 1212 is fixedly connected to the first intermediate cylinder 1211, and the other end is fixedly connected to the third intermediate cylinder 1213. The inner side of the first seal ring 1215 is interference fit with the working cylinder body 111, and the outer side is interference fit with the first intermediate cylinder 1211. The inner side of the second seal ring 1216 is interference fit with the working cylinder body 111, and the outer side is interference fit with the third intermediate cylinder 1213. The recovery intermediate chamber 122 is between the first seal ring 1215 and the partition seal ring 1214, and the compression intermediate chamber is between the partition seal ring 1214 and the second seal ring 1216. The first intermediate cylinder 1211 and the third intermediate cylinder 1213 can be installed from both ends of the shock absorber, respectively, so as to avoid the first sealing ring 1215 and the second sealing ring 1216 at the end from being scratched and affecting the sealing performance by passing through the recovery overflow hole 114 and the compression overflow hole 115. As the connecting element connecting the first intermediate cylinder 1211 and the third intermediate cylinder 1213, the sealing rings between the two ends of the second intermediate cylinder 1212 and the first intermediate cylinder 1211 and the third intermediate cylinder 1213 can be located at the overlapped part of the second intermediate cylinder 1212 and the first intermediate cylinder 1211 and the overlapped part of the second intermediate cylinder 1212 and the third intermediate cylinder 1213, so as to avoid the sealing rings from being scratched by the recovery overflow hole 114 and the compression overflow hole 115. The inner side of the partition sealing ring 1214 can be interference fit with the working cylinder body 111, and the outer side can be interference fit with the second intermediate cylinder 1212. There may be only one partition seal ring 1214 separating the recovery middle chamber 122 and the compression middle chamber 123, thereby shortening the distance between the first regulating valve 32 and the second regulating valve 33 to the greatest extent, thereby reducing the space required for installing the shock absorber.

[0036] In this embodiment, one end of the second intermediate cylinder 1212 can be threadedly connected to the first intermediate cylinder 1211, and the other end can be threadedly connected to the third intermediate cylinder 1213 to achieve better sealing.

[0037] In another embodiment, one end of the second intermediate cylinder 1212 may be welded to the first intermediate cylinder 1211 , and the other end may be welded to the third intermediate cylinder 1213 .

[0038] In this embodiment, if Figure 2 As shown, the axis of the first regulating valve 32 and the axis of the second regulating valve 33 are respectively perpendicular to the axis of the cylinder assembly 10. The angle between the axis of the first regulating valve 32 and the axis of the second regulating valve 33 is less than 180°, so that the volume of the shock absorber in the circumferential direction can be reduced and the space occupied by the shock absorber can be reduced.

[0039] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A vehicle shock absorber, characterized in that: The vehicle shock absorber comprises: A cylinder assembly, the cylinder assembly comprising a working cylinder unit, an intermediate cylinder unit and a shock-absorbing cylinder unit; the working cylinder unit comprising a working cylinder body; the intermediate cylinder unit comprising an intermediate cylinder assembly; the working cylinder body is located inside the intermediate cylinder assembly; the shock-absorbing cylinder unit comprises a shock-absorbing cylinder body; the intermediate cylinder assembly is located inside the shock-absorbing cylinder body; the working cylinder body, the intermediate cylinder assembly and the shock-absorbing cylinder body are coaxial; the inner cavity of the intermediate cylinder assembly comprises a restoring intermediate cavity and a compression intermediate cavity isolated from each other; the restoring intermediate cavity and the compression intermediate cavity are located outside the working cylinder body; the inner cavity of the shock-absorbing cylinder body comprises a storage cavity; the storage cavity is located outside the working cylinder body and the intermediate cylinder assembly; the working cylinder body is provided with a restoring overflow hole and a compression overflow hole; A piston rod assembly, the piston rod assembly comprising a connecting rod, a piston and a spring; the piston is detachably connected to the connecting rod; the outer diameter of the piston is larger than the diameter of the connecting rod; the connecting rod, the piston and the working cylinder body are coaxial; the connecting rod and the piston are located inside the working cylinder unit; the piston is slidably fitted with the inner wall of the working cylinder unit; the piston divides the inner cavity of the working cylinder body into a first working cavity and a second working cavity; the first working cavity is connected to the restoring intermediate cavity through the restoring overflow hole; the second working cavity is connected to the compression intermediate cavity through the compression overflow hole; A valve assembly, the valve assembly comprising a first regulating valve and a second regulating valve; the first regulating valve is detachably connected to the intermediate cylinder assembly and the shock absorber cylinder respectively; the second regulating valve is detachably connected to the intermediate cylinder assembly and the shock absorber cylinder respectively; the recovery intermediate chamber is connected to the storage chamber through the first regulating valve; the compression intermediate chamber is connected to the storage chamber through the second regulating valve, and the first regulating valve and the second regulating valve can adjust the pressure of the oil circulation.

2. A vehicle shock absorber according to claim 1, characterized in that: The valve assembly further includes a one-way valve; the storage chamber is connected to the restoration intermediate chamber via the one-way valve; the one-way valve unidirectionally directs the oil path from the storage chamber to the restoration intermediate chamber.

3. A vehicle shock absorber according to claim 2, characterized in that: The one-way valve is located in the first regulating valve; the one-way valve includes a valve cover, a spring valve plate, a gasket and a valve seat; the valve cover is provided with a first flow port, and the valve seat is provided with a second flow port and a third flow port; the spring valve plate is annular; the valve cover and the valve seat are distributed at opposite ends of the one-way valve; the first flow port and the second flow port are connected and penetrate the one-way valve through the spring valve plate and the center hole of the gasket; the third flow port is located on the side wall of the valve seat; the spring valve plate blocks the third flow port by elastic force in a natural state; the spring valve plate unidirectionally guides the oil path flowing from the third flow port to the inner cavity of the valve seat; the first regulating valve is connected to the recovery intermediate cavity through the second flow port of the one-way valve, the center hole of the spring valve plate and the first flow port in sequence.

4. A vehicle shock absorber according to claim 1, characterized in that: The valve assembly further comprises a compression valve; the compression valve is detachably connected to the working cylinder body; the second working chamber is communicated with the storage chamber through the compression valve.

5. A vehicle shock absorber according to claim 4, characterized in that: The compression valve is arranged in the second working chamber at one end away from the piston rod assembly.

6. A vehicle shock absorber according to claim 5, characterized in that: One end of the intermediate cylinder assembly close to the restoration intermediate chamber is the first end; one end of the intermediate cylinder assembly close to the compression intermediate chamber is the second end; one end of the shock absorber cylinder body close to the restoration intermediate chamber is the third end; one end of the shock absorber cylinder body close to the restoration intermediate chamber is the fourth end; the axial distance between the first end and the third end is greater than the axial distance between the second end and the fourth end; The third end is detachably connected with a sealing ring; the sealing ring is detachably connected to the working cylinder body; the sealing ring seals the third end; the connecting rod is slidably inserted into the center hole of the sealing ring; The fourth end is detachably connected with a sealing cover; the sealing cover seals the fourth end.

7. A vehicle shock absorber according to claim 1, characterized in that: The intermediate cylinder assembly includes multiple sections of cylinder barrels and partition sealing rings; the multiple sections of cylinder barrels are detachably connected in sequence; the partition sealing ring divides the inner cavity of the intermediate cylinder assembly into the recovery intermediate cavity and the compression intermediate cavity; the inner side of the partition sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the intermediate cylinder assembly; both ends of the intermediate cylinder assembly are respectively provided with sealing structures connected to the working cylinder body.

8. The vehicle shock absorber according to claim 1, characterized in that: The intermediate cylinder assembly includes a first intermediate cylinder, a second intermediate cylinder, a third intermediate cylinder, a partition sealing ring, a first sealing ring and a second sealing ring; one end of the second intermediate cylinder is fixedly connected to the first intermediate cylinder, and the other end is fixedly connected to the third intermediate cylinder; the inner side of the partition sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the second intermediate cylinder; the inner side of the first sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the first intermediate cylinder; the inner side of the second sealing ring is interference fit with the working cylinder body, and the outer side is interference fit with the third intermediate cylinder; the recovery intermediate chamber is between the first sealing ring and the partition sealing ring; the compression intermediate chamber is between the partition sealing ring and the second sealing ring.

9. A vehicle shock absorber according to claim 8, characterized in that: One end of the second intermediate cylinder is threadedly connected to the first intermediate cylinder, and the other end is threadedly connected to the third intermediate cylinder; Alternatively, one end of the second intermediate cylinder is welded to the first intermediate cylinder, and the other end is welded to the third intermediate cylinder.

10. The vehicle shock absorber according to claim 1, characterized in that: The axis of the first regulating valve and the axis of the second regulating valve are respectively perpendicular to the axis of the cylinder assembly; the angle between the axis of the first regulating valve and the axis of the second regulating valve is less than 180°.

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