Damping valve, shock absorber and vehicle

Abstract

The utility model relates to a damping valve, a shock absorber and a vehicle, and the damping valve comprises a valve seat assembly, a switch valve body, a driving assembly and a valve opening elastic part. The valve seat assembly is provided with an overflowing channel, and the overflowing channel is provided with a first overflowing opening and a second overflowing opening. The switch valve body is arranged opposite to the second overflowing opening and is configured to be capable of moving between an opening position and a closing position. The driving assembly is connected with the switch valve body and used for driving the switch valve body to move towards the closing position. The valve opening elastic piece is arranged between the valve seat assembly and the switch valve body, one end of the valve opening elastic piece abuts against the valve seat assembly, and the other end of the valve opening elastic piece abuts against the switch valve body. When the switch valve body is located at the closing position, the valve opening elastic piece has elastic restoring force for driving the switch valve body to move towards the opening position. By means of the damping valve, the technical problem that a damping valve in an existing shock absorber is low in valve opening speed can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of damping valves, and particularly to a damping valve, a shock absorber, and a vehicle. Background Art

[0002] Generally, a shock absorber is provided at the wheel of an automobile. Through its damping effect, the shock absorber can reduce vehicle vibrations and ensure the driving safety of the vehicle. In the related art, in order to better control the damping force in the shock absorber, a damping valve (usually an electromagnetic valve) is also provided in the shock absorber. By controlling the oil flow in the shock absorber through the damping valve, the damping force of the shock absorber can be adjusted in real time to ensure that the vehicle can maintain good ride comfort and ensure the handling performance and stability of the vehicle under complex and changeable road conditions.

[0003] However, after the damping valve in the existing shock absorber is energized to close the corresponding flow channel or reduce the flow rate of the corresponding flow channel, it is necessary for the oil to reach a relatively large pressure to push open the switch valve body in the damping valve, resulting in a slow opening speed of the damping valve, and thus a slow response speed of the shock absorber and relatively serious damping jitter. Summary of the Utility Model

[0004] An embodiment of the present application provides a damping valve to solve the technical problem of the slow opening speed of the damping valve in the existing shock absorber.

[0005] To achieve the above object, according to the first aspect of the present application, there is provided a damping valve, including a valve seat, a switch valve body, a driving component, and an opening valve elastic member. The valve seat is provided with a flow passage for communicating a first chamber and a second chamber in the shock absorber. The switch valve body is movable relative to the valve seat to adjust the communication damping between the flow passage and the second chamber. The driving component is used to drive the switch valve body to move towards the valve seat.

[0006] The opening valve elastic member has a first abutting end and a second abutting end that are elastically connected. The first abutting end is fixed relative to the valve seat, the second abutting end abuts against the switch valve body, and the opening valve elastic member applies a force to the switch valve body in a direction away from the valve seat through the second abutting end, so that the switch valve body has a tendency to move away from the valve seat.

[0007] Optionally, in one embodiment, a first positioning boss is provided at one end of the switch valve body facing the valve seat, and a second positioning boss is provided at one end of the valve seat facing the switch valve body. The second abutting end surrounds the first positioning boss, and the first abutting end surrounds the second positioning boss.

[0008] Optionally, in one embodiment, the outer diameter of the first positioning boss is smaller than that of the second positioning boss, the valve-opening elastic member is conical, and the outer diameter of the first abutting end is larger than that of the second abutting end.

[0009] Optionally, in one embodiment, the damping valve further includes a valve plate. The flow-through channel penetrates through the valve seat. The flow-through channel has a first flow-through port communicating with the first chamber and a second flow-through port communicating with the second chamber.

[0010] The valve plate covers the second flow-through port, and a valve-plate flow-through hole communicating with the second flow-through port penetrates through the valve plate.

[0011] The switch valve body is configured to be movable between an open position and a closed position. The first positioning boss is annular. When the switch valve body is in the closed position, the first positioning boss abuts against the valve plate and is arranged around the valve-plate flow-through hole.

[0012] Optionally, in one embodiment, a support ring platform surrounding the second flow-through port is provided on the second positioning boss, and the valve plate is supported on the support ring platform.

[0013] A ring-platform flow-through hole is further provided on the support ring platform. The ring-platform flow-through hole penetrates through the support ring platform in the radial direction of the support ring platform. One end of the ring-platform flow-through hole communicates with the second flow-through port, and the other end communicates with the outside of the valve seat.

[0014] Optionally, in one embodiment, the valve plate is configured to be movable relative to the valve seat in the axial direction of the valve seat. The damping valve further includes a limiting elastic member for driving the valve plate to approach the valve seat.

[0015] Optionally, in one embodiment, a first limiting through hole penetrates through the valve plate. A limiting beam is arranged in the flow-through channel. A second limiting through hole penetrates through the limiting beam. The damping valve further includes a limiting member.

[0016] The limiting member includes a first limiting head, a second limiting head, and a limiting rod. The first limiting head abuts against the side of the valve plate away from the valve seat and covers the first limiting through hole. The second limiting head is located on the side of the limiting beam away from the valve plate. The limiting rod passes through the first limiting through hole and the second limiting through hole, and the limiting rod is connected between the first limiting head and the second limiting head.

[0017] The limiting elastic member is sleeved outside the limiting rod. One end of the limiting elastic member abuts against the limiting beam, and the other end abuts against the second limiting head. The limiting elastic member is still in a compressed state.

[0018] Optionally, in one embodiment, the damping valve further includes a mounting valve body, which is sleeved outside the valve seat and is used to be sleeved in the piston valve of the shock absorber; a rebound flow hole is also provided on the side wall of the mounting valve body, and the rebound flow hole is connected to the second flow port.

[0019] Optionally, in one embodiment, the drive assembly includes a connecting valve body and a push rod, the connecting valve body is connected to the mounting valve body, and a first sliding cavity is further provided in the connecting valve body, the cavity opening of the first sliding cavity faces the second flow port, and the switch valve body is slidably assembled in the first sliding cavity;

[0020] The push rod is slidably mounted on the connecting valve body, and one end of the push rod is located in the sliding cavity and abuts against the switch valve body. The push rod is used to push the switch valve body to the closed position.

[0021] Optionally, in one embodiment, the connecting valve body is a magnetic component, and the driving assembly further includes an iron core cover, a moving iron core, and a conductive coil;

[0022] The core cover is located on a side of the connecting valve body away from the mounting valve body, and the core cover is provided with a second sliding cavity with a cavity opening facing the connecting valve body; the conductive coil surrounds the core cover; the movable iron core is slidably mounted in the second sliding cavity and fixedly connected to the push rod;

[0023] When the conductive coil is energized, the moving iron core moves toward the connecting valve body under the action of magnetic force.

[0024] Optionally, in one embodiment, the drive assembly further comprises a first elastic member and a second elastic member, both of which extend along the axial direction of the push rod, and the first elastic member abuts between the movable iron core and the iron core cover, and the second elastic member abuts between the movable iron core and the connecting valve body;

[0025] When the conductive coil is not energized, the switch valve body is in the open position under the joint action of the valve-opening elastic member, the first elastic member, and the second elastic member.

[0026] Optionally, in one embodiment, the switch valve body is provided with a first flow groove, a second flow groove, a third flow groove, a first connecting channel and a second connecting channel;

[0027] The first flow groove is located at an end of the switch valve body close to the second flow opening, with the groove opening of the first flow groove facing the second flow opening. The second flow groove is located at an end of the switch valve body away from the second flow opening. The third flow groove is recessed in the groove bottom of the second flow groove. One end of the first connecting channel is in communication with the first flow groove, and the other end is in communication with the second flow groove. One end of the second connecting channel passes through the side wall of the third flow groove, and the other end is in communication with the first sliding cavity.

[0028] A third connecting channel is provided on the side wall of the connecting valve body, one end of the third connecting channel is connected to the first sliding cavity, and the other end is used to communicate with the second cavity in the shock absorber;

[0029] One end of the push rod passes through the second flow groove and blocks the notch of the third flow groove, and the push rod can be pushed out of the notch of the third flow groove under the action of the oil pressure in the third flow groove.

[0030] Optionally, in one embodiment, the outer circumferential surface of the switch valve body includes a mating surface and a step surface, the mating surface is tightly fitted with the inner circumferential surface of the first sliding cavity, and the step surface is located at an end of the mating surface away from the valve seat;

[0031] The switch valve body is also provided with a fourth connecting channel, which extends parallel to the axial direction of the switch valve body, and one end of the fourth connecting channel is connected to the second connecting channel, and the other end is located on the step surface and is connected to the first sliding cavity.

[0032] According to a second aspect of the present application, a shock absorber is provided, comprising the damping valve described in any one of the above embodiments.

[0033] Optionally, in one embodiment, the shock absorber further includes a piston cylinder and a piston rod, an oil storage chamber is provided in the piston cylinder, the valve seat is slidably installed in the oil storage chamber and divides the oil storage chamber into the first chamber and the second chamber; one end of the piston rod is located in the second chamber, and the piston rod can drive the valve seat to move.

[0034] Optionally, in one embodiment, the damping valve further includes a mounting valve body, the mounting valve body is connected between the valve seat and the piston rod, and the first abutting end abuts against the mounting valve body.

[0035] According to a third aspect of the present application, a vehicle is provided, comprising the shock absorber described in any one of the above embodiments.

[0036] In the damping valve according to the embodiment of the present application, by providing an opening elastic member between the valve seat and the switch valve body, one end of the opening elastic member is relatively fixed to the valve seat, the other end abuts against the switch valve body, and the opening elastic member applies a force to the switch valve body in a direction away from the valve seat through the second abutting end, so that the switch valve body has a tendency to move away from the valve seat. That is, the opening elastic member can assist the oil to push open the switch valve body to open the damping valve, and it is not necessary to wait until the oil accumulates to a large pressure to open the damping valve, which improves the opening speed of the damping valve, and further can improve the response speed of the shock absorber and reduce the jitter of the damping.

[0037] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without creative efforts.

[0039] In order to more completely understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0040] Figure 1 is a structural cross-sectional view of an embodiment of the damping valve of the present application;

[0041] Figure 2 is a structural cross-sectional view of an embodiment of the shock absorber of the present application;

[0042] Figure 3 is a structural cross-sectional view of an embodiment of the valve seat assembly in the damping valve of the present application;

[0043] Figure 4 is a schematic structural view of an embodiment of the valve seat in the damping valve of the present application;

[0044] Figure 5 is a schematic structural view of an embodiment of the valve plate in the damping valve of the present application;

[0045] Figure 6 is a structural cross-sectional view of an embodiment when the valve plate in the damping valve is in close contact with the valve seat;

[0046] Figure 7 is a structural cross-sectional view of an embodiment when the valve plate in the damping valve is separated from the valve seat;

[0047] Figure 8 is a schematic structural view of an embodiment of the switch valve body in the damping valve of the present application;

[0048] Figure 9 It is a structural cross-sectional view of an embodiment of the switch valve body and the drive assembly in the damping valve of the present application;

[0049] Figure 10 is Figure 8 a structural cross-sectional view of the switch valve body in

[0050] Figure 11 is Figure 8 a structural cross-sectional view of the switch valve body from another angle in

[0051] Figure 12 It is a schematic diagram of the oil flow direction when the shock absorber is in the damping valve without power and the piston rod moves upward;

[0052] Figure 13 It is a schematic diagram of the oil flow direction when the shock absorber is in the damping valve without power and the piston rod moves downward;

[0053] Figure 14 It is a schematic diagram of the oil flow direction when the shock absorber is in the damping valve powered on and the piston rod moves upward;

[0054] Figure 15 It is a schematic diagram of the oil flow direction when the shock absorber is in the damping valve powered on and the piston rod moves upward.

[0055] Explanation of reference numerals:

[0056] 100, damping valve;

[0057] 10, valve seat assembly; 11, valve seat; 111, flow-through channel; 1111, first flow-through port; 1112, second flow-through port; 112, second positioning boss; 113, support ring platform; 1131, ring platform flow-through hole; 12, valve plate; 121, valve plate flow-through hole; 122, first limit through-hole; 13, limit elastic member; 14, limit beam; 141, second limit through-hole; 15, limiting member; 151, first limiting head; 152, second limiting head; 153, limiting rod; 16, mounting valve body; 161, return flow-through hole;

[0058] 20, switch valve body; 21, first positioning boss; 22, first flow-through groove; 23, second flow-through groove; 24, third flow-through groove; 25, first connection channel; 26, second connection channel; 27, fourth connection channel; 28, mating surface; 29, stepped surface;

[0059] 30, drive assembly; 31, connecting valve body; 311, first sliding cavity; 312, third connection channel; 32, push rod; 33, iron core cover; 34, moving iron core; 35, conductive coil; 36, first elastic member; 37, second elastic member;

[0060] 40. Valve-opening elastic member; 41. Second abutting end; 42. First abutting end;

[0061] 500. Shock absorber; 200. Piston cylinder; 210. Oil storage chamber; 211. First chamber; 212. Second chamber; 300. Piston rod; 400. Piston valve. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0063] To solve the technical problem that the valve-opening speed of the damping valve 100 in the existing shock absorber 500 is relatively slow, according to the first aspect of the present application, a damping valve 100 is provided, as Figure 1 shown. The damping valve 100 mainly includes a valve seat assembly 10, a switch valve body 20, a driving assembly 30, and a valve-opening elastic member 40.

[0064] Among them, as Figures 1 to 3 shown, the valve seat assembly 10 is provided with a flow-through channel 111. The flow-through channel 111 has a first flow-through port 1111 and a second flow-through port 1112. The first flow-through port 1111 is used to communicate with the first chamber 211 in the shock absorber 500, and the second flow-through port 1112 is used to communicate with the second chamber 212 in the shock absorber 500.

[0065] Specifically, as Figure 4 shown, the valve seat assembly 10 at least includes a valve seat 11. The overall shape of the valve seat 11 is cylindrical, and a flow-through channel 111 is provided in the valve seat 11. The flow-through channel 111 penetrates the valve seat 11 along the axial direction of the valve seat 11. It can be referred to Figure 2 , when the damping valve 100 of the present application is applied to the shock absorber 500, in addition to the damping valve 100, the shock absorber 500 further includes a piston cylinder 200, a piston rod 300, and a piston valve 400. An oil storage chamber 210 is provided in the piston cylinder 200. One end of the piston rod 300 extends into the oil storage chamber 210. The piston valve 400 is slidably installed in the oil storage chamber 210 and is fixedly arranged relative to the piston rod 300.

[0066] The valve seat assembly 10 is installed inside the piston valve 400, and together with the piston valve 400, it divides the oil storage chamber 210 into a first chamber 211 and a second chamber 212. The flow-through channel 111 inside the valve seat assembly 10 connects the first chamber 211 and the second chamber 212. Specifically, the flow-through channel 111 has a first flow-through port 1111 and a second flow-through port 1112 that are opposite to each other along its axial direction. The first flow-through port 1111 is connected to the first chamber 211, and the second flow-through port 1112 is connected to the second chamber 212.

[0067] When the vehicle passes over an uneven road surface, the piston rod 300 will drive the piston valve 400 to move up and down inside the piston cylinder 200. The oil pressure in one of the first chamber 211 and the second chamber 212 increases due to the extrusion of the piston valve 400. For example, in Figure 2 when the piston rod 300 drives the piston valve 400 to move downward, the oil pressure in the first chamber 211 increases. At this time, the oil will flow from the first chamber 211 into the second chamber 212 through the flow-through channel 111. And when the piston rod 300 drives the piston valve 400 to move upward, the oil pressure in the second chamber 212 increases. At this time, the oil will flow from the second chamber 212 into the first chamber 211 through the flow-through channel 111.

[0068] That is to say, when the vehicle passes over an uneven road surface and causes relative movement between the vehicle body and the wheels, the piston rod 300 inside the shock absorber 500 moves up and down, causing the oil in the piston cylinder 200 to repeatedly flow from one chamber through the flow-through channel 111 into the other chamber. In this way, the vibration energy generated when the vehicle passes over an uneven road surface can be converted into the heat energy of the oil, and the heat energy is directly dissipated into the atmospheric environment, thereby reducing the bumpiness of the vehicle during driving.

[0069] As Figure 1 shown, the damping valve 100 of the present application further includes a switch valve body 20. The switch valve body 20 can move relative to the valve seat 11 to adjust the damping of the connection between the flow-through channel 111 and the second chamber 212. Specifically, in this embodiment, the switch valve body 20 is disposed opposite to the second flow-through port 1112, and the switch valve body 20 is configured to be able to move between an open position and a closed position.

[0070] Reference can be made to Figure 12 or Figure 13, when the switch valve body 20 is in the open position, the switch valve body 20 is spaced apart from the second overflow port 1112. At this time, the second overflow port 1112 is fully opened, and the hydraulic oil can achieve large-flow circulation between the first chamber 211 and the second chamber 212. That is, the communication damping between the overflow channel 111 and the second chamber 212 is small. At this time, the piston rod 300 can perform rapid telescopic movement, that is, the piston rod 300 can be rapidly compressed or rebounded. At this time, the shock absorber 500 shows "softness". The softer shock absorber 500 can better absorb and relieve the impact and vibration from the road surface, reduce the bumpiness of the vehicle body, and improve the riding comfort.

[0071] It can be referred to Figure 14 or Figure 15 , when the switch valve body 20 is in the closed position, the switch valve body 20 closes at least a part of the second overflow port 1112. Specifically, when the switch valve body 20 closes a part of the overflow channel 111, the overflow area of the overflow channel 111 decreases; or, when the switch valve body 20 closes the entire overflow channel 111, the overflow channel 111 is completely closed (Note: At this time, in order to ensure that the hydraulic oil between the first chamber 211 and the second chamber 212 can flow, other channels with a smaller overflow area can be provided at other positions of the valve seat assembly 10 or other components). In short, when the switch valve body 20 closes a part or all of the second overflow port 1112, the communication damping between the overflow channel 111 and the second chamber 212 is large, the flow damping of the hydraulic oil between the first chamber 211 and the second chamber 212 increases, and the piston rod 300 can only perform slow telescopic movement, that is, the compression or rebound speed of the piston rod 300 is slow. At this time, the shock absorber 500 shows "hardness". The harder shock absorber 500 helps to improve the stability and controllability of the vehicle and ensure driving safety.

[0072] Such as Figure 1 shown, the driving assembly 30 is connected to the switch valve body 20, and the driving assembly 30 is used to drive the switch valve body 20 to move to the closed position. Specifically, as Figure 1 or Figure 9As shown, in this embodiment, the driving component 30 mainly includes a connecting valve body 31, a moving iron core 34, an iron core cover 33, a conductive coil 35, and a push rod 32. The switching valve body 20 is slidably assembled on the connecting valve body 31. The connecting valve body 31 is a magnetic member and is fixedly connected to the piston rod 300. The moving iron core 34 is slidably assembled in the iron core cover 33 and is located above the connecting valve body 31. The conductive coil 35 is wound around the outside of the iron core cover 33. One end of the push rod 32 abuts against the switching valve body 20, and the other end is fixedly connected to the moving iron core 34. When the conductive coil 35 is energized, a magnetic force is generated between the moving iron core 34 and the connecting valve body 31. Under the action of the magnetic force, the moving iron core 34 is attracted towards the connecting valve body 31. At this time, the push rod 32 drives the switching valve body 20 to move under the drive of the moving iron core 34, so that the switching valve body 20 moves from the closed position to close at least a part of the second overflow port 1112.

[0073] Of course, in some other embodiments, the driving component 30 can also be configured in other ways. For example, it can be directly driven by a linear motor, or the switching valve body 20 can be driven by a motor in cooperation with other transmission components. Specifically, it can be flexibly set according to the selection, as long as the switching valve body 20 can be pushed towards the closed position.

[0074] Crucially, in the application, the damping valve 100 further includes an open-valve elastic member 40. The open-valve elastic member 40 can specifically be a spring. As Figure 1 shown, the open-valve elastic member 40 has a first abutting end 42 and a second abutting end 41 that are elastically connected. The first abutting end 42 is fixed relative to the valve seat 11, and the second abutting end 41 abuts against the switching valve body 20. The open-valve elastic member 40 applies a force to the switching valve body 20 in a direction away from the valve seat 11 through the second abutting end 41, so that the switching valve body 20 has a tendency to move away from the valve seat 11.

[0075] Specifically, the open-valve elastic member 40 is disposed between the valve seat assembly 10 and the switching valve body 20, and one end of the open-valve elastic member 40 abuts against the valve seat assembly 10, and the other end abuts against the switching valve body 20. When the switching valve body 20 is in the closed position, the open-valve elastic member 40 is compressed and has an elastic restoring force to drive the switching valve body 20 to move towards the open position.

[0076] Specifically, the valve-opening elastic member 40 abuts between the switch valve body 20 and the valve seat assembly 10. When the switch valve body 20 moves towards the closed position under the drive of the drive assembly 30, the switch valve body 20 compresses the valve-opening elastic member 40, causing the valve-opening elastic member 40 to undergo elastic deformation and have an elastic restoring force that pushes the switch valve body 20 in the opposite direction. It can be understood that at this time, the valve-opening elastic member 40 can assist the oil fluid to push open the switch valve body 20, so that the damping valve 100 is opened, and it is not necessary to wait until the oil fluid accumulates to a relatively large pressure to open the damping valve 100, which improves the valve-opening speed of the damping valve 100, and further can improve the response speed of the shock absorber 500 and reduce the jitter of the damping force.

[0077] Therefore, the damping valve 100 proposed in this application effectively solves the technical problem that the valve-opening speed of the damping valve 100 in the existing shock absorber 500 is relatively slow.

[0078] Optionally, in an embodiment, as Figure 9 shown, one end of the switch valve body 20 facing the second fluid passage port 1112 is provided with a first positioning boss 21. As Figure 3 and Figure 4 shown, the valve seat assembly 10 is provided with a second positioning boss 112 around the circumference of the second fluid passage port 1112. Please also refer to Figure 1 , one end of the valve-opening elastic member 40 is wound around the outside of the first positioning boss 21, and the other end is wound around the outside of the second positioning boss 112. It can be understood that in this embodiment, by respectively providing positioning bosses on the switch valve body 20 and the valve seat assembly 10, and sleeving the two ends of the valve-opening elastic member 40 outside the two positioning bosses respectively, the positioning of the valve-opening elastic member 40 can be realized, avoiding the situation that the valve-opening elastic member 40 is displaced during use, and improving the reliability of the damping force.

[0079] Optionally, in an embodiment, as Figure 1 shown, the outer diameter of the first positioning boss 21 is smaller than the outer diameter of the second positioning boss 112. The valve-opening elastic member 40 is conical and has a second abutting end 41 and a first abutting end 42 that are opposite to each other in its axial direction. The second abutting end 41 is wound around the outside of the first positioning boss 21, and the first abutting end 42 is wound around the outside of the second positioning boss 112. It can be understood that in this embodiment, by making the outer diameter of the first positioning boss 21 smaller than the outer diameter of the first positioning boss 21, the volume of the switch valve body 20 can be made smaller, and thus the overall structure of the damping valve 100 is more compact. Further, on the basis that the outer diameter of the first positioning boss 21 is smaller than the outer diameter of the second positioning boss 112, in order to enable the two ends of the valve-opening elastic member 40 to be stably sleeved outside the two positioning bosses respectively, this embodiment makes the valve-opening elastic member 40 conical, and the valve-opening elastic member 40 has a second abutting end 41 sleeved outside the first positioning boss 21 and a first abutting end 42 sleeved outside the second positioning boss 112, so that the installation stability of the valve-opening elastic member 40 can be improved.

[0080] Optionally, in one embodiment, as Figure 3 shown, the valve seat assembly 10 includes a valve seat 11 and a valve plate 12. An over-flow channel 111 runs through the valve seat 11, and a first over-flow port 1111 and a second over-flow port 1112 are respectively located at two ends of the valve seat 11 in the axial direction. The valve plate 12 covers the second over-flow port 1112, and a valve plate over-flow hole 121 that communicates with the second over-flow port 1112 runs through the valve plate 12. Specifically, in this embodiment, the valve plate 12 is circular and covers the second over-flow port 1112 of the valve seat 11, and the valve plate over-flow hole 121 runs through the valve plate 12. The valve plate over-flow hole 121 communicates with the second over-flow port 1112, and the size, shape, quantity, etc. of the valve plate over-flow hole 121 can be flexibly set according to needs. For example, in Figure 5 the shown structural solution, the valve plate over-flow hole 121 is approximately elliptical, and there are three valve plate over-flow holes 121, and the three valve plate over-flow holes 121 are evenly spaced along the circumferential direction of the valve plate 12.

[0081] As Figure 14 or Figure 15 shown, the first positioning boss 21 is annular, and when the switch valve body 20 is in the closed position, the first positioning boss 21 abuts against the valve plate 12 and is arranged around the valve plate over-flow hole 121. At this time, the switch valve body 20 can close the valve plate over-flow hole 121, so that the oil in the second chamber 212 cannot flow to the valve plate over-flow hole 121. Since the valve plate 12 covers the second over-flow port 1112 and the valve plate over-flow hole 121 communicates with the second over-flow port 1112, the second over-flow port 1112 is at least communicated with the second chamber 212 through the valve plate over-flow hole 121. If the second over-flow port 1112 is only communicated with the second chamber 212 through the valve plate over-flow hole 121, then when the switch valve body 20 is in the closed position, the switch valve body 20 completely closes the second over-flow port 1112; and if the second over-flow port 1112 is communicated with the second chamber 212 not only through the valve plate over-flow hole 121 but also through other over-flow holes, then when the switch valve body 20 is in the closed position, the switch valve body 20 closes a part of the second over-flow port 1112.

[0082] For example, optionally, in one embodiment, as Figure 3 and Figure 4 shown, a support ring platform 113 that surrounds the second over-flow port 1112 is provided on the second positioning boss 112, and the valve plate 12 is supported on the support ring platform 113; a ring platform over-flow hole 1131 is also provided on the support ring platform 113. The ring platform over-flow hole 1131 runs through the support ring platform 113 along the radial direction of the support ring platform 113, and one end of the ring platform over-flow hole 1131 communicates with the second over-flow port 1112, and the other end communicates with the outside of the valve seat 11.

[0083] That is to say, in this embodiment, in addition to being connected to the second chamber 212 through the valve plate flow hole 121, the second flow port 1112 is also connected to the second chamber 212 through the annular platform flow hole 1131. Please refer to Figure 14 or Figure 15 Understand that when the switch valve body 20 closes the valve plate flow hole 121 by abutting against the valve plate 12, the switch valve body 20 only closes a part of the second flow port 1112. The second flow port 1112 can still be connected to the second chamber 212 through the annular platform flow hole 1131, so that the oil can flow between the first chamber 211 and the second chamber 212 through the second flow port 1112 and the annular platform flow hole 1131. At this time, there is no need to provide other channels on other components, which simplifies the structure of the damping valve 100.

[0084] It should be noted that in this embodiment, the flow area of the valve plate flow hole 121 is larger than that of the annular platform flow hole 1131. Therefore, when the second flow port 1112 can be connected to the second chamber 212 through the valve plate flow hole 121, the flow damping of the oil between the first chamber 211 and the second chamber 212 is smaller, and the shock absorber 500 shows "soft" at this time. When the second flow port 1112 is only connected to the second chamber 212 through the annular platform flow hole 1131, the flow damping of the oil between the first chamber 211 and the second chamber 212 is larger, and the shock absorber 500 shows "hard" at this time.

[0085] Optionally, in one embodiment, as Figure 6 and Figure 7 shown, the valve plate 12 is configured to be able to move relative to the valve seat 11 along the axial direction of the valve seat 11. The valve seat assembly 10 further includes a limiting elastic member 13, and the limiting elastic member 13 is used to drive the valve plate 12 to approach the valve seat 11. Specifically, in this embodiment, the valve plate 12 is independent of the valve seat 11, and thus can move relative to the valve seat 11 along the axial direction of the valve seat 11. And in this embodiment, the valve seat assembly 10 further includes a limiting elastic member 13, and the limiting elastic member 13 is used to drive the valve plate 12 to approach the valve seat 11.

[0086] Therefore, as Figure 6 shown, the valve plate 12 tightly covers the second flow port 1112 under the elastic force of the limiting elastic member 13. When the oil pressure in the first chamber 211 is relatively high, as Figure 7 shown, the oil can push the valve plate 12 away from the second flow port 1112, that is, push the valve plate 12 towards the switch valve body 20, thereby increasing the area of the second flow port 1112 and reducing the flow damping of the oil. As the oil flows from the first chamber 211 into the second chamber 212, the oil pressure in the first chamber 211 decreases, and the valve plate 12 will move towards the valve seat 11 under the elastic force of the limiting elastic member 13 until the valve plate 12 covers the second flow port 1112 again.

[0087] It should be noted here that there are various ways of linkage between the limiting elastic member 13 and the valve plate 12. For example, the limiting elastic member 13 can be located on the side of the valve plate 12 away from the valve seat 11. Optionally, in an embodiment, as Figure 5 shown, a first limiting through hole 122 is formed through the valve plate 12. As Figure 4 shown, a limiting beam 14 is provided in the flow-through channel 111, and a second limiting through hole 141 is formed through the limiting beam.

[0088] As Figure 6 or Figure 7 shown, the valve seat assembly 10 further includes a limiting member 15. The limiting member 15 includes a first limiting head 151, a second limiting head 152, and a limiting rod 153. The first limiting head 151 abuts against the side of the valve plate 12 away from the valve seat 11, and the first limiting head 151 is arranged to cover the first limiting through hole 122. The second limiting head 152 is located on the side of the limiting beam 14 away from the valve plate 12. The limiting rod 153 passes through the first limiting through hole 122 and the second limiting through hole 141, and the limiting rod 153 is connected between the first limiting head 151 and the second limiting head 152.

[0089] The limiting elastic member 13 is sleeved outside the limiting rod 153. One end of the limiting elastic member 13 abuts against the limiting beam 14, and the other end abuts against the second limiting head 152. The limiting elastic member 13 is still in a compressed state. In this way, the limiting elastic member 13 will generate an elastic restoring force that pushes the second limiting head 152 downward. The second limiting head 152 pulls down the first limiting head 151 through a connecting rod, and the pulled-down first limiting head 151 presses the valve plate 12 tightly against the valve seat 11.

[0090] When the oil pressure in the first chamber 211 increases, the oil pushes the second limiting head 152 upward, causing the second limiting head 152 to compress the limiting elastic member 13 and push the first limiting head 151 away from the valve plate 12. At this time, the valve plate 12 can move upward relative to the valve seat 11 under the pushing action of the oil, thereby opening the second flow-through port 1112, making the flow-through area of the second flow-through port 1112 larger and reducing the flow damping of the oil.

[0091] It should be noted here that the limiting member 15 can be composed of a bolt and a nut. The head of the bolt forms the first limiting head 151, the rod portion of the bolt forms the limiting rod 153, and the nut is connected to the end of the limiting rod 153 away from the first limiting head 151 and forms the second limiting head 152.

[0092] Optionally, in an embodiment, as Figure 3As shown, the valve seat assembly 10 further includes a mounting valve body 16. The mounting valve body 16 is sleeved outside the valve seat 11. The second abutting end 41 of the valve opening elastic member 40 abuts against the mounting valve body 16, and the mounting valve body 16 is used to be sleeved inside the piston valve 400 of the shock absorber 500. In this way, the installation of the valve seat 11 on the piston valve 400 can be realized, and further the flow passage 111 in the valve seat 11 can be located between the first chamber 211 and the second chamber 212. Since the mounting valve body 16 is sleeved outside the valve seat 11, in order to enable the second flow port 1112 to communicate with the second chamber 212, in this embodiment, a rebound flow hole 161 is further provided on the side wall of the mounting valve body 16. The rebound flow hole 161 communicates with the second chamber 212, and the rebound flow hole 161 is connected to the second flow port 1112. Further, the second flow port 1112 can communicate with the second chamber 212 through the rebound flow hole 161.

[0093] Optionally, in one embodiment, as Figure 9 shown, the driving assembly 30 includes a connecting valve body 31 and a push rod 32. The connecting valve body 31 is connected to the mounting valve body 16. Refer to Figure 2 , when the damping valve 100 is applied to the shock absorber 500, the connecting valve body 31 is connected to the piston rod 300, and the mounting valve body 16 is used to be connected to the piston valve 400. In this way, the relative fixation between the piston rod 300 and the piston valve 400 is realized.

[0094] In this embodiment, as Figure 9 shown, a first sliding cavity 311 is further provided in the connecting valve body 31. The orifice of the first sliding cavity 311 faces the second flow port 1112, and the orifice of the first sliding cavity 311 communicates with the second flow port 1112. The switch valve body 20 is slidably assembled in the first sliding cavity 311. The push rod 32 is slidably mounted on the connecting valve body 31, and one end of the push rod 32 is located in the sliding cavity and abuts against the switch valve body 20. The push rod 32 is used to push the switch valve body 20 to the closed position.

[0095] It can be understood that by slidably mounting the switch valve body 20 on the connecting valve body 31 and the push rod 32 being used to push the switch valve body 20 to the closed position, the switch valve body 20 can move towards the closed position by sliding. And under the guiding action of the first sliding cavity 311, the switch valve body 20 can move more smoothly, and further at least a part of the second flow port 1112 can be closed stably and reliably.

[0096] For the power source of the push rod 32, optionally, in one embodiment, as Figure 9 shown, the connecting valve body 31 is a magnetic member. The driving assembly 30 further includes an iron core cover 33, a moving iron core 34 and a conductive coil 35.

[0097] The iron core cover 33 is located on the side of the connecting valve body 31 away from the mounting valve body 16, and the iron core cover 33 is provided with a second sliding cavity with an orifice facing the connecting valve body 31; the conductive coil 35 is wound around the outside of the iron core cover 33; the moving iron core 34 is slidably installed in the second sliding cavity and is fixedly connected to the push rod 32. When the conductive coil 35 is energized, the moving iron core 34 moves towards the connecting valve body 31 under the action of magnetic force, and then can drive the push rod 32 to push the switch valve body 20 to move.

[0098] It can be understood that in this embodiment, the push rod 32 is driven by an electromagnetic drive method, which not only has a simple structure but also a fast response speed, and can make the switch valve body 20 quickly close at least a part of the second overflow port 1112.

[0099] Optionally, in an embodiment, as shown in FIG. 9, the drive assembly 30 further includes a first elastic member 36 and a second elastic member 37. Both the first elastic member 36 and the second elastic member 37 extend along the axial direction of the push rod 32, and the first elastic member 36 abuts between the moving iron core 34 and the iron core cover 33, and the second elastic member 37 abuts between the moving iron core 34 and the connecting valve body 31.

[0100] Please refer to Figure 2 Understand that when the conductive coil 35 is not energized, that is, when no magnetic force is generated between the moving iron core 34 and the connecting valve body 31, the switch valve body 20 is in the open position under the combined action of the valve-opening elastic member 40, the first elastic member 36 and the second elastic member 37. That is to say, in this embodiment, the damping valve 100 remains normally open when not energized, and there is no need to push the switch valve body 20 open by hydraulic oil. In this way, when the conductive coil 35 is energized and then de-energized, the switch valve body 20 can return to the open position more quickly under the auxiliary action of multiple elastic members, thereby improving the response speed of the shock absorber 500 and reducing the jitter of the damping.

[0101] Optionally, in an embodiment, as shown in Figure 8 、 Figure 10 and Figure 11 shown, the switch valve body 20 is provided with a first overflow groove 22, a second overflow groove 23, a third overflow groove 24, a first connection channel 25 and a second connection channel 26.

[0102] Among them, the first overflow groove 22 is located at one end of the switch valve body 20 close to the second overflow port 1112, and the orifice of the first overflow groove 22 faces the second overflow port 1112. The second overflow groove 23 is located at the end of the switch valve body 20 away from the second overflow port 1112. The third overflow groove 24 is recessed in the bottom of the second overflow groove 23; one end of the first connection channel 25 communicates with the first overflow groove 22, and the other end communicates with the second overflow groove 23; one end of the second connection channel 26 penetrates the side wall of the third overflow groove 24, and the other end communicates with the first sliding cavity 311.

[0103] As shown Figure 9 in the figure, a third connection channel 312 is provided on the side wall of the connecting valve body 31. One end of the third connection channel 312 communicates with the first sliding cavity 311, and the other end is used to communicate with the second cavity 212 in the shock absorber 500. One end of the push rod 32 passes through the second flow-through groove 23 and blocks the notch of the third flow-through groove 24, and the push rod 32 can be pushed to disengage from the notch of the third flow-through groove 24 under the action of the oil pressure in the third flow-through groove 24.

[0104] Specifically, based on the above structure, reference can be made to Figure 14 the figure. When the vehicle is driving on an uneven road surface, the conductive coil 35 is energized. At this time, the switch valve body 20 moves to the closed position to close the valve sheet flow-through hole 121. If the piston rod 300 drives the piston valve 400 to move upward and compress the second cavity 212 at this time, the oil pressure in the second cavity 212 will increase. At this time, the oil in the second cavity 212 mainly flows into the first cavity 211 through the annular platform flow-through hole 1131 and the second flow-through port 1112. At this time, the damping of the oil is relatively large, and the shock absorber 500 shows "hard".

[0105] At the same time, the oil in the second cavity 212 will also flow into the first sliding cavity 311 through the third connection channel 312, and the oil flowing into the first sliding cavity 311 will continue to flow into the third flow-through groove 24 through the second connection channel 26. As the oil in the third flow-through groove 24 increases, the oil pressure in the third flow-through groove 24 gradually increases. When the oil pressure in the third flow-through groove 24 increases to a certain value, the oil in the third flow-through groove 24 will push open the push rod 32 and flow into the second flow-through groove 23. Subsequently, the oil flows into the first flow-through groove 22 through the first connection channel 25, and then flows into the first cavity 211 through the valve sheet flow-through hole 121 and the flow-through channel 111, so that the oil pressure in the first cavity 211 increases.

[0106] As shown Figure 12 in the figure, when the oil pressures above and below the valve sheet 12 are balanced, the valve-opening elastic member 40 will push open the switch valve body 20, so that the damping valve 100 quickly opens the valve, and the oil in the second cavity 212 can flow into the flow-through channel 111 and the first cavity 211 through the valve sheet flow-through hole 121, thereby further reducing the damping of the oil.

[0107] It can be understood that through the above structural design in this embodiment, the valve-opening speed of the damping valve 100 can be further improved, thereby improving the response speed of the shock absorber 500 and reducing the jitter of the damping.

[0108] Optionally, since the switch valve body 20 is slidably assembled in the first sliding cavity 311, most of the space in the first sliding cavity 311 will be occupied by the switch valve body 20, and only a part of the space above the switch valve body 20 can accommodate the oil flowing in from the third connection channel 312. In order to enable one end of the second connection channel 26 to communicate with the sliding cavity, as Figure 8 and Figure 11 shown, in an embodiment, the outer peripheral surface of the switch valve body 20 includes a mating surface 28 and a stepped surface 29. The mating surface 28 is in close fit with the inner peripheral surface of the first sliding cavity 311, which can prevent the oil in the first sliding cavity 311 from directly leaking to the second oil flow port 1112. The stepped surface 29 is located at the end of the mating surface 28 away from the valve seat 11, that is, the stepped surface 29 is located at the upper end of the switch valve body 20, and thus can contact the oil in the first sliding cavity 311. The switch valve body 20 is also provided with a fourth connection channel 27. The fourth connection channel 27 extends parallel to the axial direction of the switch valve body 20, and one end of the fourth connection channel 27 communicates with the second connection channel 26, and the other end is located on the stepped surface 29 and communicates with the first sliding cavity 311. That is, the second connection channel 26 can communicate with the first sliding cavity 311 through the fourth connection channel 27.

[0109] As Figure 2 shown, according to the second aspect of the present application, a shock absorber 500 is provided. The shock absorber 500 includes the damping valve 100 of any one of the above embodiments. Since the shock absorber 500 includes the damping valve 100 of any one of the above embodiments, the shock absorber 500 has all the beneficial effects of the above damping valve 100, and will not be elaborated here.

[0110] Optionally, in an embodiment, as Figure 2 shown, the shock absorber 500 further includes a piston cylinder 200 and a piston rod 300. The piston cylinder 200 is provided with an oil storage cavity 210. The valve seat 11 is slidably installed in the oil storage cavity 210 and divides the oil storage cavity 210 into a first cavity 211 and a second cavity 212. One end of the piston rod 300 is located in the second cavity 212, and the piston rod 300 can drive the valve seat 11 to move. Specifically, in this embodiment, the piston cylinder 200 is a hollow cylindrical structure to form the oil storage cavity 210. The oil storage cavity 210 is filled with damping oil. The valve seat 11 in the damping valve 100 is slidably assembled in the oil storage cavity 210, and the mounting seat divides the oil storage cavity 210 into a first cavity 211 and a second cavity 212. The oil can flow between the first cavity 211 and the second cavity 212 through the oil flow channel 111 on the valve seat 11.

[0111] One end of the piston rod 300 is located in the second chamber 212, and the piston rod 300 can drive the valve seat 11 to move. The valve seat 11 can be directly connected to the piston rod 300, or can be connected to the piston rod 300 through an intermediate member (such as a connecting valve body 31, a mounting valve body 16, etc.). For example, in one embodiment, the damping valve 100 further includes a mounting valve body 16. The mounting valve body 16 is connected between the valve seat 11 and the piston rod 300. The piston rod 300 drives the valve seat 11 to move by driving the mounting valve body 16 to move. The first abutting end 42 of the valve opening elastic member 40 abuts against the mounting valve body, and thus the first abutting end 42 is fixed relative to the valve seat 11.

[0112] Optionally, in another embodiment, as Figure 2 shown, the shock absorber 500 further includes a piston cylinder 200, a piston rod 300 and a piston valve 400. An oil storage chamber 210 is provided in the piston cylinder 200. The piston valve 400 is slidably mounted in the oil storage chamber 210. The valve seat assembly 10 is sleeved on the piston valve 400, and the valve seat assembly 10 and the piston valve 400 together divide the oil storage chamber 210 into a first chamber 211 and a second chamber 212. The first flow port 1111 communicates with the first chamber 211, and the second flow port 1112 communicates with the second chamber 212. One end of the piston rod 300 is located in the second chamber 212. The driving assembly 30 is mounted on the piston rod 300. The piston rod 300 and the piston valve 400 are relatively fixed. Specifically, the connecting valve body in the driving assembly 30 is fixedly connected to the mounting valve body 16 in the valve seat assembly 10. That is, the piston rod 300 and the piston valve 400 are fixedly connected through the connecting valve body 31 and the mounting valve body 16. In this way, the damping valve 100 can move together with the piston rod 300 and the piston valve 400, and thus the damping of the shock absorber 500 can be better controlled.

[0113] The working principle of the shock absorber 500 of the present application will be described below with reference to the accompanying drawings.

[0114] As Figure 12 and Figure 13 shown, when the vehicle is traveling on a relatively flat road surface, the conductive coil 35 is not energized. At this time, the switch valve body 20 is kept in the open position under the combined action of the valve opening elastic member 40, the first elastic member 36 and the second elastic member 37, which is equivalent to the damping valve 100 being a normally open valve.

[0115] Among them, as Figure 12 shown, the red dotted line in the figure is the oil flow path. When the piston rod 300 drives the piston valve 400 to move upward, the second chamber 212 is squeezed and the oil pressure increases. At this time, the oil in the second chamber 212 flows into the first chamber 211 through the rebound flow hole 161 on the mounting valve body 16, the valve plate flow hole 121 on the valve plate 12, the second flow port 1112, the flow channel 111, and the compression flow hole in sequence. The oil flow rate is large during this process, and the shock absorber 500 shows "soft".

[0116] As Figure 13 shown, the red dotted line in the figure is the oil flow path. When the piston rod 300 drives the piston valve 400 to move downward, the first chamber 211 is squeezed and the oil pressure increases. At this time, the oil in the first chamber 211 can push the valve plate 12 away from the second flow port 1112. The oil in the first chamber 211 sequentially passes through the first flow port 1111, the flow channel 111, the second flow port 1112, the gap between the valve seat 11 and the valve plate 12, and the rebound flow hole 161 on the mounting valve body 16 and flows into the second chamber 212. During this process, the oil flow rate is also large, and the shock absorber 500 shows "soft".

[0117] In summary, it can be found that when the vehicle is driving on a relatively flat road surface, the shock absorber 500 of the present application shows "soft". In this way, the shock absorber 500 can better absorb and relieve the impact and vibration from the road surface, reduce the bumpiness of the vehicle body, and improve the riding comfort.

[0118] As Figure 14 and Figure 15 shown, when the vehicle is driving on an uneven road surface and is about to pass over a bump or a pothole, the conductive coil 35 is energized. At this time, the switch valve body 20 moves to the closed position under the drive of the drive assembly 30. The switch valve body 20 abuts on the valve plate 12 and surrounds the valve plate flow hole 121, thereby closing the valve plate flow hole 121, reducing the flow area of the flow channel 111, that is, the flow damping of the oil between the second chamber 212 and the first chamber 211 is large.

[0119] Among them, as Figure 14 shown, when the piston rod 300 drives the piston valve 400 to move upward, the second chamber 212 is compressed and the oil pressure increases. At this time, the oil flow between the second chamber 212 and the first chamber 211 is divided into three stages ( Figure 14 the red dotted line in Figure 14 is the oil flow path in the first stage, and the blue dotted line in

[0120] is the oil flow path in the second stage).

[0121] In the second stage, referring to the blue dashed line, as the oil in the third overflow groove 24 increases, the oil pressure in the third overflow groove 24 gradually increases. When the oil pressure in the third overflow groove 24 increases to a certain value, the oil in the third overflow groove 24 will push open the push rod 32 and flow into the second overflow groove 23. Then, the oil flows through the first connection channel 25, the first overflow groove 22, the valve plate overflow hole 121, the second overflow port 1112, the overflow channel 111, and the first overflow port 1111 in sequence and flows into the first chamber 211.

[0122] In the third stage, reference can be made to Figure 12 , as the oil in the second chamber 212 continuously flows into the overflow channel 111, a large amount of oil accumulates below the valve plate 12. When the oil pressures above and below the valve plate 12 are balanced, the valve-opening elastic member 40 will push the switch valve body 20 away from the valve plate 12, enabling the oil to directly flow from the valve plate overflow hole 121 on the valve plate 12 into the overflow channel 111 and the first chamber 211, that is, the oil flow rate increases and the damping decreases.

[0123] As Figure 15 shown, when the piston rod 300 drives the piston valve 400 to move downward, the first chamber 211 is compressed and the oil pressure increases. At this time, the flow of oil between the second chamber 212 and the first chamber 211 can be divided into two stages ( Figure 15 the red dashed line in

[0124] is the flow path of the oil in the first stage).

[0125] In the first stage, the oil in the first chamber 211 flows into the second chamber 212 through the first overflow port 1111, the overflow channel 111, the second overflow port 1112, the ring groove overflow hole 1131 on the support ring platform 113, and the rebound overflow hole 161 on the mounting valve body 16 in sequence. The oil flow rate in this stage is small, and the shock absorber 500 shows "hardness".

[0125] In the second stage, reference can be made to Figure 13 , because the oil flow rate is small, a large amount of oil accumulates in the overflow channel 111 (i.e., below the valve plate 12). When the sum of the oil pressure acting force below the valve plate 12 and the elastic force of the valve-opening elastic member 40 is greater than the electromagnetic force acting on the push rod 32, the oil and the valve-opening elastic member 40 jointly push the valve plate 12 and the switch valve body 20 upward, thereby causing the valve plate 12 to open the second overflow port 1112, and a large amount of oil can flow into the second chamber 212 from the gap between the valve plate 12 and the valve seat 11, and the damping decreases.

[0126] In summary, it can be found that after the conductive coil 35 is energized to close the second overcurrent port 1112 of the switch valve body 20 (i.e., the damping valve 100 is closed), the valve-opening elastic member 40 plays an auxiliary role in opening the valve. It is not necessary to wait until the oil accumulates to a large pressure to open the damping valve 100, which improves the valve-opening speed of the damping valve 100, and thus can improve the response speed of the shock absorber 500 and reduce the jitter of the damping.

[0127] According to the third aspect of the present application, a vehicle (not shown) is provided. The vehicle includes the shock absorber 500 of any one of the above embodiments. Since the shock absorber 500 includes the damping valve 100 of any one of the above embodiments, the vehicle has all the beneficial effects of the above damping valve 100, which will not be elaborated here.

[0128] Among them, the vehicle can be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and the present disclosure does not make specific limitations thereto.

[0129] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0130] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not elaborated in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0131] The embodiments, implementation manners and related technical features of the present application can be combined and replaced with each other without conflict.

[0132] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A damping valve for a shock absorber, characterized in that, Comprising: A valve seat provided with a flow-through channel for communicating a first chamber and a second chamber within the shock absorber; A switch valve body capable of moving relative to the valve seat to adjust the communication damping between the flow-through channel and the second chamber; A drive assembly for driving the switch valve body towards the valve seat; and, An opening valve elastic member having a first abutting end and a second abutting end that are elastically connected. The first abutting end is fixed relative to the valve seat, the second abutting end abuts against the switch valve body, and the opening valve elastic member applies a force to the switch valve body in a direction away from the valve seat through the second abutting end, such that the switch valve body has a tendency to move away from the valve seat.

2. The damping valve according to claim 1, wherein A first positioning boss is provided at one end of the switch valve body facing the valve seat, and a second positioning boss is provided at one end of the valve seat facing the switch valve body. The second abutting end surrounds the first positioning boss, and the first abutting end surrounds the second positioning boss.

3. The damping valve according to claim 2, characterized in that, The outer diameter of the first positioning boss is smaller than the outer diameter of the second positioning boss. The opening valve elastic member is conical, and the outer diameter of the first abutting end is larger than the outer diameter of the second abutting end.

4. The damping valve according to claim 2, characterized in that, The damping valve further includes a valve disc. The flow-through channel has a first flow-through port communicating with the first chamber and a second flow-through port communicating with the second chamber; The valve disc covers the second flow-through port, and a valve disc flow-through hole communicating with the second flow-through port is formed through the valve disc; The switch valve body is configured to be capable of moving between an open position and a closed position. The first positioning boss is annular. When the switch valve body is in the closed position, the first positioning boss abuts against the valve disc and is disposed around the valve disc flow-through hole.

5. The damping valve according to claim 4, characterized in that A support ring platform surrounding the second flow-through port is provided on the second positioning boss, and the valve disc is supported on the support ring platform; A ring platform flow-through hole is further provided on the support ring platform. The ring platform flow-through hole penetrates the support ring platform in the radial direction of the support ring platform, and one end of the ring platform flow-through hole communicates with the second flow-through port, and the other end communicates with the outside of the valve seat.

6. The damping valve according to claim 4, wherein The valve disc is configured to be capable of moving relative to the valve seat in the axial direction of the valve seat. The damping valve further includes a limiting elastic member for driving the valve disc to approach the valve seat.

7. The damping valve according to claim 6, characterized in that, A first limiting through hole is formed through the valve disc, a limiting beam is provided in the flow-through channel, and a second limiting through hole is formed through the limiting beam. The damping valve further includes a limiting member; The limiting member includes a first limiting head, a second limiting head, and a limiting rod. The first limiting head abuts against the side of the valve disc away from the valve seat and covers the first limiting through hole. The second limiting head is located on the side of the limiting beam away from the valve disc. The limiting rod is inserted through the first limiting through hole and the second limiting through hole, and the limiting rod is connected between the first limiting head and the second limiting head; The limiting elastic member is sleeved outside the limiting rod, and one end of the limiting elastic member abuts against the limiting beam, and the other end abuts against the second limiting head. The limiting elastic member is also in a compressed state.

8. The damping valve according to any one of claims 4-7, characterized in that, The damping valve also includes a mounting valve body, which is sleeved outside the valve seat and is used to be sleeved in the piston valve of the shock absorber; a rebound flow hole is also provided on the side wall of the mounting valve body, and the rebound flow hole is connected to the second flow port.

9. The damping valve according to claim 8, wherein The driving assembly includes a connecting valve body and a push rod. The connecting valve body is connected to the mounting valve body. A first sliding cavity is further provided in the connecting valve body. The cavity opening of the first sliding cavity faces the second flow port. The switch valve body is slidably assembled in the first sliding cavity. The push rod is slidably mounted on the connecting valve body, and one end of the push rod is located in the sliding cavity and abuts against the switch valve body. The push rod is used to push the switch valve body to the closed position.

10. The damping valve according to claim 9, characterized in that, The connecting valve body is a magnetic component, and the driving assembly further includes an iron core cover, a moving iron core and a conductive coil; The core cover is located on a side of the connecting valve body away from the mounting valve body, and the core cover is provided with a second sliding cavity with a cavity opening facing the connecting valve body; the conductive coil surrounds the core cover; the movable iron core is slidably mounted in the second sliding cavity and fixedly connected to the push rod; When the conductive coil is energized, the moving iron core moves toward the connecting valve body under the action of magnetic force.

11. The damping valve according to claim 10, characterized in that, The driving assembly further includes a first elastic member and a second elastic member, wherein the first elastic member and the second elastic member both extend along the axial direction of the push rod, and the first elastic member abuts between the movable iron core and the iron core cover, and the second elastic member abuts between the movable iron core and the connecting valve body; When the conductive coil is not energized, the switch valve body is in the open position under the joint action of the valve-opening elastic member, the first elastic member, and the second elastic member.

12. The damping valve according to claim 9, characterized in that, The switch valve body is provided with a first flow groove, a second flow groove, a third flow groove, a first connecting channel and a second connecting channel; The first flow groove is located at an end of the switch valve body close to the second flow opening, with the groove opening of the first flow groove facing the second flow opening. The second flow groove is located at an end of the switch valve body away from the second flow opening. The third flow groove is recessed in the groove bottom of the second flow groove. One end of the first connecting channel is in communication with the first flow groove, and the other end is in communication with the second flow groove. One end of the second connecting channel passes through the side wall of the third flow groove, and the other end is in communication with the first sliding cavity. A third connecting channel is provided on the side wall of the connecting valve body, one end of the third connecting channel is connected to the first sliding cavity, and the other end is used to communicate with the second cavity in the shock absorber; One end of the push rod passes through the second flow groove and blocks the notch of the third flow groove, and the push rod can be pushed out of the notch of the third flow groove under the action of the oil pressure in the third flow groove.

13. The damping valve according to claim 12, characterized in that, The outer peripheral surface of the switch valve body includes a mating surface and a stepped surface. The mating surface is in close contact with the inner peripheral surface of the first sliding cavity, and the stepped surface is located at one end of the mating surface away from the valve seat. The switch valve body is further provided with a fourth connection channel. The fourth connection channel extends parallel to the axial direction of the switch valve body, and one end of the fourth connection channel communicates with the second connection channel, and the other end is located on the stepped surface and communicates with the first sliding cavity.

14. A shock absorber, characterized in that, Including the damper valve according to any one of claims 1-13.

15. The shock absorber according to claim 14, characterized in that, The shock absorber further includes a piston cylinder and a piston rod. An oil storage cavity is provided in the piston cylinder. The valve seat is slidably installed in the oil storage cavity and divides the oil storage cavity into the first cavity and the second cavity. One end of the piston rod is located in the second cavity, and the piston rod can drive the valve seat to move.

16. The shock absorber according to claim 15, characterized in that, The damper valve further includes a mounting valve body. The mounting valve body is connected between the valve seat and the piston rod, and the first abutting end abuts on the mounting valve body.

17. A vehicle, characterized in that, Including the shock absorber according to any one of claims 14-16.

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