Shock absorber, suspension and vehicle

Abstract

The invention discloses a shock absorber, a suspension and a vehicle, and the shock absorber comprises a barrel assembly, a piston assembly, a piston rod assembly and a piston rod assembly, the valve seat is connected to one end of the cylinder assembly, a flow channel is formed in the valve seat, an adjusting valve set and a hydraulic unit are arranged on the valve seat, and the adjusting valve set and the hydraulic unit are communicated with a working cavity through the flow channel. According to the shock absorber, the posture of a vehicle body can be adjusted, the shock absorber works cooperatively through the adjusting valve set and the hydraulic unit, and the shock absorber has the advantages of being fast in response, high in efficiency and the like.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a shock absorber, suspension, and vehicle. Background Technology

[0002] Vibration dampers in related technologies typically adjust the flow rate of fluid, thereby regulating the damping force under compression or recovery conditions. However, due to unreasonable structural design, the damping adjustment response of these dampers is slow, inefficient, and results in poor vibration damping performance. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a vibration damper that can work in conjunction with a regulating valve assembly and a hydraulic unit, offering advantages such as fast response and high efficiency.

[0004] The present invention also proposes a suspension having the above-mentioned shock absorber.

[0005] The present invention also proposes a vehicle having the above-described suspension.

[0006] To achieve the above objectives, a vibration damper is provided according to a first aspect of the present invention, the vibration damper comprising: a cylindrical assembly having a working chamber; a valve seat connected to one end of the cylindrical assembly, the valve seat having a flow channel, and a regulating valve group and a hydraulic unit provided on the valve seat, the regulating valve group and the hydraulic unit respectively communicating with the working chamber through the flow channel.

[0007] Thus, according to the embodiments of the present invention, the vibration damper constructs a flow channel directly on the valve seat, and the regulating valve assembly and hydraulic unit are located on the valve seat. In this way, the flow channel of the vibration damper can be a rigid direct flow channel with a short flow channel distance. The vibration damper has the ability to build up pressure quickly, and the damping response of the hydraulic unit can be fast. Moreover, the fast damping response of the hydraulic unit is the basis for the coordinated work of the regulating valve assembly and the hydraulic unit. Therefore, the vibration damper can utilize the coordinated work of the regulating valve assembly and the hydraulic unit, and has the advantages of fast response and high efficiency.

[0008] According to some embodiments of the present invention, the working chamber includes a first working chamber and a second working chamber arranged axially along the cylindrical assembly, wherein the regulating valve group and the hydraulic unit are respectively connected to the first working chamber and the second working chamber through the flow channel; wherein, when the shock absorber is in the recovery condition, the fluid in the first working chamber flows to the second working chamber through the regulating valve group and the hydraulic unit; when the shock absorber is in the compression condition, the fluid in the second working chamber flows to the first working chamber through the regulating valve group and the hydraulic unit.

[0009] According to some embodiments of the present invention, the cylinder assembly further includes: an intermediate cavity, one end of which is connected to the first working cavity and the other end of which is connected to the flow channel; and an oil storage cavity, which is connected to the flow channel.

[0010] According to some embodiments of the present invention, the flow channel includes: a first main flow channel, one end of which is connected to the oil storage chamber and the other end of which is connected to the regulating valve group; a second main flow channel, one end of which is connected to the intermediate chamber and the other end of which is connected to the regulating valve group and the hydraulic unit respectively; and a third main flow channel, one end of which is connected to the second working chamber and the other end of which is connected to the regulating valve group and the hydraulic unit respectively.

[0011] According to some embodiments of the present invention, the regulating valve assembly is used to regulate the flow rate of fluid flowing from the second main channel to the first main channel; and / or, the regulating valve assembly is used to regulate the flow rate of fluid flowing from the third main channel to the first main channel.

[0012] According to some embodiments of the present invention, the regulating valve assembly includes: a first solenoid valve connected to the valve seat, the first solenoid valve communicating with the first main channel and the second main channel, the first solenoid valve being used to regulate the flow rate of fluid flowing from the second main channel to the first main channel; and a second solenoid valve connected to the valve seat, the second solenoid valve communicating with the first main channel and the third main channel, the second solenoid valve being used to regulate the flow rate of fluid flowing from the third main channel to the first main channel.

[0013] According to some embodiments of the present invention, the flow channel further includes: a first sub-flow channel, the first sub-flow channel connecting the first main flow channel and the first solenoid valve; a second sub-flow channel, the second sub-flow channel connecting the second main flow channel and the first solenoid valve; a third sub-flow channel, the third sub-flow channel connecting the first main flow channel and the second solenoid valve; and a fourth sub-flow channel, the fourth sub-flow channel connecting the third main flow channel and the second solenoid valve.

[0014] According to some embodiments of the present invention, the flow channel further includes: a fifth sub-flow channel, the fifth sub-flow channel connecting the second main flow channel and the hydraulic unit; and a sixth sub-flow channel, the sixth sub-flow channel connecting the third main flow channel and the hydraulic unit.

[0015] According to some embodiments of the present invention, the vibration damper further includes: a first sensor disposed on the valve seat and located in the fifth sub-flow channel, the first sensor being used to detect the fluid pressure and temperature in the fifth sub-flow channel; and / or, a second sensor disposed on the valve seat and located in the sixth sub-flow channel, the second sensor being used to detect the fluid pressure and temperature in the sixth sub-flow channel.

[0016] According to some embodiments of the present invention, the first main channel, the second main channel, and the third main channel are arranged radially spaced along the valve seat; and / or, the first main channel and the second main channel extend circumferentially along the valve seat, and the first main channel and the second main channel do not overlap at least partially along the radial projection of the valve seat.

[0017] According to some embodiments of the present invention, the cylinder assembly includes: a working cylinder having a working chamber; an intermediate cylinder located radially outside the working cylinder, forming the intermediate chamber between the intermediate cylinder and the working cylinder; and / or an outer cylinder located radially outside the intermediate cylinder, forming the oil storage chamber between the outer cylinder and the intermediate cylinder.

[0018] According to some embodiments of the present invention, the damper further includes: a first piston assembly, which is movably disposed within the oil reservoir, the first piston assembly dividing the oil reservoir into a first chamber and a second chamber, the second chamber communicating with the flow channel; and a limiting member disposed at one end of the second chamber near the valve seat, the limiting member being adapted to contact the first piston assembly to impede the movement of the first piston assembly.

[0019] According to some embodiments of the present invention, at least some of the regulating valve assembly and at least some of the hydraulic unit are arranged at circumferential intervals along the valve seat.

[0020] According to a second aspect of the present invention, a suspension is provided, the suspension comprising the shock absorber described in the first aspect of the present invention.

[0021] According to the second aspect of the present invention, the suspension, by utilizing the shock absorber according to the first aspect of the present invention, can utilize the adjustment valve group and the hydraulic unit to work together to divert fluid, resulting in more precise damping adjustment and active control capabilities, and has the advantage of convenient assembly.

[0022] A vehicle is provided according to a third aspect of the present invention, the vehicle including the suspension described in the second aspect of the present invention.

[0023] According to the third aspect of the present invention, the vehicle, by utilizing the suspension according to the second aspect of the present invention, can utilize the adjustment valve group and hydraulic unit to work together to divert fluid, resulting in more precise damping adjustment and active control capabilities, and also has the advantages of convenient assembly.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a vibration damper according to an embodiment of the present invention; Figure 2 This is a cross-sectional view of a vibration damper according to an embodiment of the present invention; Figure 3 This is a partial cross-sectional view of the valve seat at the first solenoid valve position according to an embodiment of the present invention; Figure 4 This is a partial cross-sectional view of the valve seat at the second solenoid valve position according to an embodiment of the present invention; Figure 5 This is a partial cross-sectional view of the vibration damper at the location of the guide sealing assembly according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the valve seat of the vibration damper according to an embodiment of the present invention; Figure 7 This is a cross-sectional view of the first piston assembly of a shock absorber according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of a vibration damper according to another embodiment of the present invention; Figure 9 This is a partial cross-sectional view of a vibration damper according to another embodiment of the present invention.

[0026] Figure label: 1. Vibration damper; 100. Cylinder assembly; 110. Working cylinder; 111. Working chamber; 112. First working chamber; 113. Second working chamber; 114. Support base; 120. Intermediate cylinder; 121. Intermediate cavity; 122. Connecting hole; 130. Outer cylinder; 131. Oil reservoir; 132. First chamber; 133. Second chamber; 134. Limiting component; 135. Air inlet; 140. End cap; 200. Valve seat; 201. Mounting platform; 202. First bolt; 203. Process hole; 204. Plug; 205. First sealing ring; 206. First mounting point; 207. Second mounting point; 208. Circular boss; 210. First main flow channel; 220. Second main flow channel; 230. Third main flow channel; 240. First sub-flow channel; 250. Second sub-flow channel; 260. Third sub-flow channel; 270. Fourth sub-flow channel; 280. Fifth sub-flow channel; 281. Third mounting point; 282. Oil injector; 290. Sixth sub-flow channel; 291. Fourth mounting point; 300, Control valve assembly; 310, First solenoid valve; 320, Second solenoid valve; 330, Solenoid valve mounting sleeve; 350. Hydraulic unit; 351. First sensor; 352. Second sensor; 400. Second piston assembly; 410. Piston rod; 420. Piston body; 430. Anti-collision assembly; 500, Guide sealing assembly; 510, First sealing seat; 511, Positioning groove; 512, Second sealing ring; 520, Guide seat; 530, Second sealing seat; 531, Third sealing ring; 532, Mounting groove; 540, Oil seal; 550, Sliding bearing; 560, Fourth sealing ring; 600, First piston assembly; 610, Piston body; 611, Groove; 620, Fifth sealing ring; 630, Sixth sealing ring; 700, fork section; 710, fork section connecting sleeve; 720, second bolt. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0030] In the description of this invention, "a plurality of" means two or more, and "several" means one or more.

[0031] The vibration damper 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0032] like Figures 1-9 As shown, the vibration damper 1 according to an embodiment of the present invention includes a cylinder assembly 100 and a valve seat 200.

[0033] The cylinder assembly 100 is provided with a working chamber 111. A valve seat 200 is connected to one end of the cylinder assembly 100. The valve seat 200 is constructed with a flow channel. A regulating valve group 300 and a hydraulic unit 350 are provided on the valve seat 200. The regulating valve group 300 and the hydraulic unit 350 are respectively connected to the working chamber 111 through the flow channel.

[0034] For example, the working chamber 111 may include a first working chamber 112 and a second working chamber 113 arranged along the axial direction of the cylinder assembly 100, and the regulating valve group 300 and the hydraulic unit 350 are respectively connected to the first working chamber 112 and the second working chamber 113 through flow channels.

[0035] The first working chamber 112 can be a recovery chamber, and the second working chamber 113 can be a compression chamber. In addition, the outer peripheral surface of the valve seat 200 can be provided with a mounting platform 201, and the hydraulic unit 350 can be a hydraulic pump, which can be fixedly mounted to the mounting platform 201 by bolts.

[0036] In addition, the shock absorber 1 may also include a second piston assembly 400, the piston body 420 of the second piston assembly 400 is disposed in the working chamber 111, the second piston assembly 400 is movable along the axial direction of the working chamber 111, and the second piston assembly 400 divides the working chamber 111 into a first working chamber 112 and a second working chamber 113 along the axial direction of the cylinder assembly 100.

[0037] Specifically, when the shock absorber 1 is in the recovery condition, the fluid in the first working chamber 112 can flow to the second working chamber 113 through the regulating valve group 300 and the hydraulic unit 350 respectively; when the shock absorber 1 is in the compression condition, the fluid in the second working chamber 113 can flow to the first working chamber 112 through the regulating valve group 300 and the hydraulic unit 350 respectively.

[0038] According to an embodiment of the present invention, the vibration damper 1, by directly constructing a flow channel on the valve seat 200, allows the first working chamber 112 and the second working chamber 113 to be connected through the flow channel on the valve seat 200. This eliminates the need to construct a flow channel on the second piston assembly 400, thus not affecting the volume and strength of the second piston assembly 400, and simplifying its structure. Furthermore, since the valve seat 200 is located outside the cylinder assembly 100, maintenance of the flow channel on the valve seat 200 is convenient, further simplifying the structure of the vibration damper 1.

[0039] Furthermore, the flow channel design of the valve seat 200 allows the flow channel structure of the damper 1 to be a rigid straight flow channel with a short flow channel distance, enabling rapid pressure build-up. When the second piston assembly 400 moves up and down, the fluid can quickly and directly enter the flow channels of the regulating valve group 300 and the hydraulic unit 350. The parallel flow channels enable the regulating valve group 300 and the hydraulic unit 350 to quickly respond to the algorithm and perform coordinated control of damping force and active force, thereby improving the damping force control bandwidth and the precision of damping force control. In addition, the compact flow channels increase the response speed of damping force and active force, which is beneficial to improving the hydraulic transmission efficiency.

[0040] Furthermore, regarding the coordinated control and adjustment of damping, in related technologies, multiple components used to adjust damping force are connected in series, or the hydraulic pump in related technologies needs to be connected via hydraulic hoses. The damping response of the hydraulic pump is relatively slow, while the fast response speed of the hydraulic pump is the basis for the coordinated control and adjustment of the hydraulic unit 350 and the regulating valve group 300. Therefore, it cannot achieve the ability of the hydraulic unit 350 and the regulating valve group 300 to coordinately control and adjust the damping force as in this invention. In contrast, this invention directly sets the regulating valve group 300 and the hydraulic unit 350 on the valve seat 200, and the regulating valve group 300 and the hydraulic unit 350 are respectively connected to the flow channel. That is, the regulating valve group 300 and the hydraulic unit 350 can be connected in parallel, and the hydraulic unit 350 can be directly connected to the flow channel on the valve seat 200. The hydraulic unit 350 has a faster response speed, which enables the regulating valve group 300 and the hydraulic unit 350 to coordinately adjust the damping force.

[0041] Specifically, by simultaneously arranging a regulating valve assembly 300 and a hydraulic unit 350 on the valve seat 200, the damping force of the shock absorber 1 can originate from the coordinated control of the regulating valve assembly 300 and the hydraulic unit 350. Compared with shock absorbers that rely solely on solenoid valves or hydraulic pumps to provide variable damping, this invention can greatly expand the damping bandwidth, which is beneficial to improving the vibration reduction effect of the shock absorber 1. Furthermore, the regulating valve assembly 300 can share the flow entering the hydraulic unit 350, reducing the risk of damage to the hydraulic unit 350 caused by hydraulic shock and increasing the durability of the hydraulic unit 350.

[0042] Moreover, by placing the regulating valve assembly 300 and the hydraulic unit 350 on the valve seat 200, the axial dimension of the shock absorber 1 will not be too large. The stroke of the shock absorber 1 under compression and recovery conditions can still be large. The shock absorber 1 can be applied to more vehicle models, and the shock absorber 1 can have more space to absorb and digest the impact from the road surface, thereby significantly improving comfort and smoothness.

[0043] It should be noted that when the shock absorber 1 is in passive damping mode, the regulating valve assembly 300 and the hydraulic unit 350 can simultaneously control the flow of fluid in the shock absorber 1, or only one of the regulating valve assembly 300 and the hydraulic unit 350 can control the flow of fluid in the shock absorber 1. When the shock absorber 1 is in active damping mode, the flow of fluid in the shock absorber 1 can be controlled by the hydraulic unit 350. That is, the shock absorber 1 can have both active and passive damping functions, which can better optimize the vehicle's comfort and handling.

[0044] Furthermore, by mounting all hydraulic units 350 on valve seats 200, the hydraulic units 350 can be closer to the second piston assembly 400, and hydraulic hoses can be omitted, reducing pressure loss. This results in higher efficiency and faster response of the hydraulic units 350 when generating active and damping forces. Moreover, by assembling both the hydraulic units 350 and the regulating valve assembly 300 onto the valve seats 200, the number of parts is reduced, eliminating components such as hydraulic hoses, connectors, and shut-off valves, resulting in a cost advantage. It also offers universality for vehicle installation, providing a basis for widespread adoption and platform development. Only existing shock absorbers need to be replaced, without needing to reserve space in the subframe, simplifying assembly.

[0045] Thus, the shock absorber 1 according to the embodiment of the present invention can utilize the regulating valve group 300 and the hydraulic unit 350 to work together to divert fluid, making the damping adjustment and active control capabilities more precise, and possessing advantages such as fast response, high efficiency, high reliability and convenient assembly.

[0046] In some specific embodiments of the present invention, such as Figure 1 and Figure 3 As shown, the cylinder assembly 100 is also provided with an intermediate cavity 121 and an oil storage cavity 131.

[0047] One end of the intermediate cavity 121 is connected to the first working cavity 112, and the other end of the intermediate cavity 121 is connected to the flow channel. The oil storage cavity 131 is connected to the flow channel.

[0048] The oil storage chamber 131, the intermediate chamber 121 and the working chamber 111 can be arranged radially along the cylinder assembly 100. Specifically, the first working chamber 112 can be connected to the flow channel on the valve seat 200 through the intermediate chamber 121.

[0049] With this configuration, the damper 1 can be constructed as a three-cylinder damper 1 with the working chamber 111, intermediate chamber 121, and oil reservoir 131 distributed radially. The heat dissipation area of ​​the damper 1 can be large and the fluid flow path can be long, which can significantly reduce thermal attenuation and maintain stable damping performance for longer during long-term, high-intensity operation.

[0050] In some specific embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the flow channel includes a first main flow channel 210, a second main flow channel 220, and a third main flow channel 230.

[0051] One end of the first main channel 210 is connected to the oil storage chamber 131, and the other end of the first main channel 210 is connected to the regulating valve group 300. One end of the second main channel 220 is connected to the intermediate chamber 121, and the other end of the second main channel 220 is connected to the regulating valve group 300 and the hydraulic unit 350 respectively. One end of the third main channel 230 is connected to the second working chamber 113, and the other end of the third main channel 230 is connected to the regulating valve group 300 and the hydraulic unit 350 respectively.

[0052] In other words, the first main flow channel 210 is the flow channel corresponding to the oil storage chamber 131, the second main flow channel 220 is the flow channel corresponding to the intermediate chamber 121, and the third main flow channel 230 is the flow channel corresponding to the second working chamber 113. Among them, the first main flow channel 210, the second main flow channel 220, and the third main flow channel 230 can all extend along the axial direction of the valve seat 200.

[0053] With this configuration, the oil reservoir 131 and the regulating valve assembly 300 can be connected via the first main flow channel 210, thereby enabling fluid flow between them. Furthermore, the intermediate chamber 121 and the regulating valve assembly 300, as well as the intermediate chamber 121 and the hydraulic unit 350, can be connected via the second main flow channel 220, thereby enabling fluid flow between them. Additionally, the second working chamber 113 and the regulating valve assembly 300, as well as the second working chamber 113 and the hydraulic unit 350, can be connected via the third main flow channel 230, thereby enabling fluid flow between them.

[0054] In some specific embodiments of the present invention, the regulating valve assembly 300 is used to regulate the flow rate of fluid flowing from the second main channel 220 to the first main channel 210; and / or, the regulating valve assembly 300 is used to regulate the flow rate of fluid flowing from the third main channel 230 to the first main channel 210.

[0055] In other words, when the shock absorber 1 is working, for example, when the shock absorber 1 is in the recovery condition, the fluid flowing from the second main channel 220 to the first main channel 210 will flow through the regulating valve assembly 300. At this time, the flow rate of this part of the fluid can be adjusted by the regulating valve assembly 300, thereby adjusting the damping force of the shock absorber 1 under the recovery condition. Alternatively, when the shock absorber 1 is working, for example, when the shock absorber 1 is in the compression condition, the fluid flowing from the third main channel 230 to the first main channel 210 will flow through the regulating valve assembly 300. At this time, the flow rate of this part of the fluid can be adjusted by the regulating valve assembly 300, thereby adjusting the damping force of the shock absorber 1 under the compression condition.

[0056] Furthermore, such as Figure 1 and Figure 3 As shown, the regulating valve assembly 300 includes a first solenoid valve 310, which is connected to the valve seat 200 and connects to the first main channel 210 and the second main channel 220.

[0057] Specifically, one end of the first solenoid valve 310 is connected to the other end of the first main channel 210, and the other end of the first solenoid valve 310 is connected to the other end of the second main channel 220. The first solenoid valve 310 is used to regulate the flow rate of fluid flowing from the second main channel 220 to the first main channel 210.

[0058] In addition, such as Figure 1 and Figure 4 As shown, the regulating valve assembly 300 may further include a second solenoid valve 320, which is connected to the first main channel 210 and the third main channel 230.

[0059] Specifically, the second solenoid valve 320 is connected to the valve seat 200. One end of the second solenoid valve 320 is connected to the other end of the first main channel 210, and the other end of the second solenoid valve 320 is connected to the other end of the third main channel 230. The second solenoid valve 320 is used to regulate the flow rate of the fluid flowing from the third main channel 230 to the first main channel 210.

[0060] The first solenoid valve 310 is a reset-side solenoid valve, and the second solenoid valve 320 is a compression-side solenoid valve. Additionally, the regulating valve assembly 300 may have two solenoid valve mounting sleeves 330, which can be welded to the valve seat 200 respectively. The first solenoid valve 310 and the second solenoid valve 320 can be respectively fixed to the two solenoid valve mounting sleeves 330 via threaded connections, thus simplifying the installation and maintenance of the first solenoid valve 310 and the second solenoid valve 320.

[0061] For example, the first solenoid valve 310 may have a first check valve and a first throttle valve arranged in parallel. The first check valve only allows fluid to flow from the first main flow channel 210 to the second main flow channel 220, and the first throttle valve can throttle the flow of fluid. Thus, when the shock absorber 1 is in the recovery condition, the fluid flows from the second main flow channel 220 to the first main flow channel 210, and the first throttle valve can throttle the fluid flowing through the first solenoid valve 310 to adjust the flow rate of this part of the fluid, thereby achieving the adjustment of the damping force under the recovery condition. When the shock absorber 1 is in the compression condition, the fluid flowing through the first solenoid valve 310 flows from the first main flow channel 210 to the second main flow channel 220. Since the fluid resistance of the first check valve is smaller, the fluid can flow directly through the first check valve, that is, the fluid flowing through the first solenoid valve 310 does not pass through the first throttle valve at this time.

[0062] Additionally, the second solenoid valve 320 may be equipped with a second check valve and a second throttle valve connected in parallel. The second check valve only allows fluid to flow from the first main flow channel 210 to the third main flow channel 230, while the second throttle valve can throttle the flow of fluid. Thus, when the damper 1 is in compression mode, the fluid flows from the third main flow channel 230 to the first main flow channel 210, and the second throttle valve can throttle the fluid flowing through the second solenoid valve 320 to regulate the flow rate of this portion of the fluid, thereby achieving damping force adjustment under compression mode. When the damper 1 is in recovery mode, the fluid flowing through the first solenoid valve 310 flows from the first main flow channel 210 to the third main flow channel 230. Since the second check valve has lower fluid resistance, the fluid can flow directly through the second check valve; that is, the fluid flowing through the second solenoid valve 320 does not need to be throttled by the second throttle valve.

[0063] In summary, when the shock absorber 1 is in the recovery mode, the fluid can flow through the first throttle valve and the second check valve. The first throttle valve throttles the flow, meaning that the damping force of the fluid can be adjusted independently using the first solenoid valve 310 during the recovery mode. Conversely, when the shock absorber 1 is in the compression mode, the fluid can flow through the second throttle valve and the first check valve. The second throttle valve throttles the flow, meaning that the damping force of the fluid can be adjusted independently using the second solenoid valve 320 during the compression mode. This configuration allows the fluid flowing through the regulating valve assembly 300 to be throttled to adjust the damping force in both the recovery and compression modes of the shock absorber 1. This enables independent adjustment of the compression and recovery modes of the shock absorber 1, and allows for coordinated control, thereby increasing the damping bandwidth.

[0064] In some specific embodiments of the present invention, such as Figure 1As shown, at least a portion of the regulating valve assembly 300 and at least a portion of the hydraulic unit 350 are arranged at intervals along the circumference of the valve seat 200. In other words, the connection points between the regulating valve assembly 300 and the valve seat 200 and the connection points between the hydraulic unit and the valve seat 200 can be arranged at intervals along the circumference of the valve seat 200.

[0065] For example, the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350 are arranged at intervals along the circumference of the valve seat 200. It should be noted that the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350 can be arranged at the same height in the axial direction of the valve seat 200, or the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350 can be arranged at different positions in the axial direction of the valve seat 200.

[0066] With this configuration, the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350 will not interfere with each other in the circumferential direction of the valve seat 200. It can also reduce the space occupied by the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350 in the axial direction of the shock absorber 1, further avoiding the excessive axial dimension of the shock absorber 1. The shock absorber 1 can have a larger stroke under compression and recovery conditions, so that the shock absorber 1 can be used in more vehicle models. The shock absorber 1 can also have more space to absorb and digest the impact from the road surface, thereby significantly improving comfort and smoothness.

[0067] In some embodiments, such as Figure 1 As shown, the first solenoid valve 310 and the second solenoid valve 320 can be longitudinally connected to the valve seat 200, that is, the axial direction of the first solenoid valve 310 and the axial direction of the second solenoid valve 320 are parallel to the axial direction of the valve seat 200.

[0068] In other embodiments, such as Figure 8 As shown, the first solenoid valve 310 and the second solenoid valve 320 can be laterally connected to the valve seat 200, that is, the axial direction of the first solenoid valve 310 and the axial direction of the second solenoid valve 320 are parallel to the radial direction of the valve seat 200.

[0069] In some specific embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the flow channel also includes a first sub-flow channel 240, a second sub-flow channel 250, a third sub-flow channel 260, and a fourth sub-flow channel 270.

[0070] The first sub-flow channel 240 connects the first main flow channel 210 and the first solenoid valve 310. Specifically, one end of the first sub-flow channel 240 is connected to the other end of the first main flow channel 210, and the other end of the first sub-flow channel 240 is connected to one end of the first solenoid valve 310. That is, the oil storage chamber 131 and the first solenoid valve 310 can be connected through the first main flow channel 210 and the first sub-flow channel 240 to realize fluid flow between the oil storage chamber 131 and the first solenoid valve 310.

[0071] The second sub-flow channel 250 connects the second main flow channel 220 and the first solenoid valve 310. Specifically, one end of the second sub-flow channel 250 is connected to the other end of the second main flow channel 220, and the other end of the second sub-flow channel 250 is connected to the other end of the first solenoid valve 310. That is, the intermediate cavity 121 and the first solenoid valve 310 can be connected through the second main flow channel 220 and the second sub-flow channel 250 to realize fluid flow between the intermediate cavity 121 and the first solenoid valve 310.

[0072] The third sub-flow channel 260 connects the first main flow channel 210 and the second solenoid valve 320. Specifically, one end of the third sub-flow channel 260 is connected to the other end of the first main flow channel 210, and the other end of the third sub-flow channel 260 is connected to one end of the second solenoid valve 320. That is, the oil storage chamber 131 and the second solenoid valve 320 can be connected through the first main flow channel 210 and the third sub-flow channel 260, thereby enabling fluid flow between the oil storage chamber 131 and the second solenoid valve 320.

[0073] The fourth sub-flow channel 270 connects to the third main flow channel 230 and the second solenoid valve 320. Specifically, one end of the fourth sub-flow channel 270 is connected to the other end of the third main flow channel 230, and the other end of the fourth sub-flow channel 270 is connected to the other end of the second solenoid valve 320. That is, the second working chamber 113 and the second solenoid valve 320 can be connected through the third main flow channel 230 and the fourth sub-flow channel 270, thereby enabling fluid flow between the second working chamber 113 and the second solenoid valve 320.

[0074] Therefore, when the shock absorber 1 is in the recovery condition, the fluid in the first working chamber 112 can flow into the second working chamber 113 in sequence through the intermediate chamber 121, the second main flow channel 220, the second sub-flow channel 250, the first solenoid valve 310, the first sub-flow channel 240, the first main flow channel 210, the oil storage chamber 131, the first main flow channel 210, the third sub-flow channel 260, the second solenoid valve 320, the fourth sub-flow channel 270, and the third main flow channel 230. At this time, the flow rate of the fluid can be adjusted by the first solenoid valve 310 to adjust the recovery damping force of the shock absorber 1. When the damper 1 is in compression mode, the fluid in the second working chamber 113 can flow into the first working chamber 112 in sequence through the third main channel 230, the fourth sub-channel 270, the second solenoid valve 320, the third sub-channel 260, the first main channel 210, the oil storage chamber 131, the first main channel 210, the first sub-channel 240, the first solenoid valve 310, the second sub-channel 250, the second main channel 220 and the intermediate chamber 121. At this time, the flow rate of the fluid can be adjusted by the second solenoid valve 320 to adjust the compression damping force of the damper 1.

[0075] In addition, such as Figure 3 As shown, the valve seat 200 may also be provided with multiple process holes 203. One process hole 203 can be connected to the second sub-flow channel 250, and another process hole 203 can be connected to the fourth sub-flow channel 270. This facilitates the machining of the second sub-flow channel 250 and the fourth sub-flow channel 270 on the valve seat 200. The process holes 203 can be sealed by plugs 204. The plugs 204 can be threaded to the process holes 203 and sealed by the first sealing ring 205.

[0076] In some specific embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the first sub-flow channel 240 and the third sub-flow channel 260 are arranged at intervals along the circumference of the valve seat 200, so that the first sub-flow channel 240 and the third sub-flow channel 260 will not interfere with each other in position, so that the first sub-flow channel 240 and the third sub-flow channel 260 can be connected to the first main flow channel 210 respectively.

[0077] It should be noted that the first main channel 210 can be one, that is, the first sub-channel 240 and the third sub-channel 260 are respectively connected to the first main channel 210; or, the first main channel 210 can be two, that is, the first sub-channel 240 and the third sub-channel 260 are respectively connected to the oil storage cavity 131 through one first main channel 210.

[0078] In addition, the second sub-flow channel 250 and the fourth sub-flow channel 270 are arranged circumferentially around the valve seat 200, so that the second sub-flow channel 250 and the fourth sub-flow channel 270 will not interfere with each other in position, so that the second sub-flow channel 250 can be connected to the second main flow channel 220, and the third sub-flow channel 260 can be connected to the third main flow channel 230.

[0079] In some specific embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the first sub-flow channel 240 and the second sub-flow channel 250 are spaced apart along the axial direction of the valve seat 200, so that the first sub-flow channel 240 and the second sub-flow channel 250 will not interfere with each other in position, so that the first sub-flow channel 240 can be connected with the first main flow channel 210, and the second sub-flow channel 250 can be connected with the second main flow channel 220.

[0080] The third sub-flow channel 260 and the fourth sub-flow channel 270 are spaced apart along the axial direction of the valve seat 200, so that the third sub-flow channel 260 and the fourth sub-flow channel 270 will not interfere with each other in position, so that the third sub-flow channel 260 can be connected to the first main flow channel 210, and the fourth sub-flow channel 270 can be connected to the third main flow channel 230.

[0081] In summary, the layout of the aforementioned multiple flow channels is more rational, ensuring they do not interfere with each other and have a compact structure. It is understood that the above flow channel arrangement is only one embodiment, but not limited to it; the specific flow channel arrangement can be adjusted according to the arrangement of the regulating valve assembly 300.

[0082] In some specific embodiments of the present invention, such as Figure 6 and Figure 8 As shown, the flow channel also includes a fifth sub-flow channel 280 and a sixth sub-flow channel 290.

[0083] The fifth sub-flow channel 280 connects the second main flow channel 220 and the hydraulic unit 350. Specifically, one end of the fifth sub-flow channel 280 is connected to the other end of the second main flow channel 220, and the other end of the fifth sub-flow channel 280 is connected to one end of the hydraulic unit 350. That is, the intermediate cavity 121 and the hydraulic unit 350 can be connected through the second main flow channel 220 and the fifth sub-flow channel 280 to realize fluid flow between the intermediate cavity 121 and the hydraulic unit 350. In other words, the first working cavity 112 can be connected to the hydraulic unit 350 in sequence through the intermediate cavity 121, the second main flow channel 220, and the fifth sub-flow channel 280.

[0084] The sixth sub-flow channel 290 connects the third main flow channel 230 and the hydraulic unit 350. Specifically, one end of the sixth sub-flow channel 290 is connected to the other end of the third main flow channel 230, and the other end of the sixth sub-flow channel 290 is connected to the other end of the hydraulic unit 350. That is, the second working chamber 113 and the hydraulic unit 350 can be connected through the third main flow channel 230 and the sixth sub-flow channel 290 to realize fluid flow between the second working chamber 113 and the hydraulic unit 350. In this way, the first working chamber 112 and the second working chamber 113 can be connected sequentially through the intermediate chamber 121, the second main flow channel 220, the fifth sub-flow channel 280, the hydraulic unit 350, the sixth sub-flow channel 290, and the third main flow channel 230.

[0085] Specifically, when the shock absorber 1 is in the recovery condition, the fluid in the first working chamber 112 can flow into the second working chamber 113 sequentially through the intermediate chamber 121, the second main flow channel 220, the fifth sub-flow channel 280, the hydraulic unit 350, the sixth sub-flow channel 290, and the third main flow channel 230. At this time, the recovery damping force of the shock absorber 1 can be adjusted by the hydraulic unit 350. When the shock absorber 1 is in the compression condition, the fluid in the second working chamber 113 can flow into the first working chamber 112 sequentially through the third main flow channel 230, the sixth sub-flow channel 290, the hydraulic unit 350, the fifth sub-flow channel 280, the second main flow channel 220, and the intermediate chamber 121. At this time, the compression damping force of the shock absorber 1 can also be adjusted by the hydraulic unit 350.

[0086] In summary, the valve seat 200 of this embodiment adopts a three-layer axial annular flow channel and a six-branch flow channel design. The three-layer bearing flow channels correspond one-to-one with the oil storage chamber 131, the intermediate chamber 121, and the second working chamber 113, respectively. The six branch flow channels correspond to the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350, respectively. Specifically, among the three main flow channels, the outermost first main flow channel 210 corresponds to the oil storage chamber 131, the middle second main flow channel 220 corresponds to the intermediate chamber 121, and the innermost third main flow channel 230 corresponds to the second working chamber 113. Among the six branch flow channels, the first sub-flow channel 240 and the second sub-flow channel 250 correspond to the first solenoid valve 310, the third sub-flow channel 260 and the fourth sub-flow channel 270 correspond to the second solenoid valve 320, and the fifth sub-flow channel 280 and the sixth sub-flow channel 290 correspond to the hydraulic unit 350.

[0087] In some specific embodiments of the present invention, such as Figure 1 and Figure 8 As shown, the vibration damper 1 also includes a first sensor 351. The first sensor 351 can be a pressure and temperature sensor.

[0088] The first sensor 351 is disposed on the valve seat 200 and located in the fifth sub-flow channel 280. For example, the first sensor 351 may be located at one end of the fifth sub-flow channel 280 adjacent to the hydraulic unit 350. The first sensor 351 is used to detect the fluid pressure and temperature in the fifth sub-flow channel 280, that is, the first sensor 351 is used to detect the fluid pressure and temperature at one end of the hydraulic unit 350.

[0089] In some specific embodiments of the present invention, such as Figure 1 and Figure 8 As shown, the vibration damper 1 also includes a second sensor 352. The second sensor 352 can also be a pressure or temperature sensor.

[0090] The second sensor 352 is disposed on the valve seat 200 and located in the sixth sub-flow channel 290. For example, the second sensor 352 may be located at one end of the sixth sub-flow channel 290 adjacent to the hydraulic unit 350. The second sensor 352 is used to detect the fluid pressure and temperature in the sixth sub-flow channel 290, that is, the second sensor 352 is used to detect the fluid pressure and temperature at the other end of the hydraulic unit 350.

[0091] In other words, the first sensor 351 is a recovery-side sensor, and the second sensor 352 is a compression-side temperature sensor.

[0092] By directly arranging the first sensor 351 and the second sensor 352 on the valve seat 200, the controller can directly obtain the pressure and fluid temperature information on both sides of the second piston assembly 400 through the first sensor 351 and the second sensor 352 without having to convert it from the pressure sensor of the pump body.

[0093] Specifically, since the fifth sub-channel 280 is connected to the first working chamber 112 through the second main channel 220 and the intermediate cavity 121, and the sixth sub-channel 290 is connected to the second working chamber 113 through the third main channel 230, the first sensor 351 and the second sensor 352 can respectively measure the fluid pressure and temperature above and below the second piston assembly 400. That is, the first sensor 351 can measure the fluid pressure and temperature in the first working chamber 112, and the second sensor 352 can measure the fluid pressure and temperature in the second working chamber 113.

[0094] Furthermore, the mounting points of both the first sensor 351 and the second sensor 352 are located on the valve seat 200, between the hydraulic unit 350 and the working chamber 111. This allows the first sensor 351 and the second sensor 352 to directly and accurately measure the pressure on both sides of the second piston assembly 400, as well as the pressure and temperature of the fluid at the inlet and outlet of the hydraulic unit 350, without the need for algorithm compensation. It is understandable that this pressure value is a key feedback parameter for the controller's control command output, and also a key parameter for monitoring the status of the hydraulic unit 350 and the shock absorber 1.

[0095] In other words, the valve seat 200 design of this embodiment of the invention allows both the first sensor 351 and the second sensor 352 to be integrated on the shock absorber 1. Both the first sensor 351 and the second sensor 352 can be relatively close to the working chamber 111. Compared with the solution of placing the sensor on the hydraulic pump or other positions far away from the second piston assembly 400, this embodiment of the invention can accurately measure the pressure on both sides of the second piston assembly 400 to accurately and in real time feedback the active force, which is also the basis for the shock absorber 1 to have active control capability.

[0096] In addition, this method of installing pressure and temperature sensors can save axial space for the damper 1, avoiding the problem of excessive axial dimensions caused by directly installing it on the hydraulic unit 350.

[0097] Among them, such as Figure 1 and Figure 8 As shown, a first mounting point 206 can be provided above the valve seat 200. The first mounting point 206 is located above and connected to the fifth sub-flow channel 280. The first sensor 351 is installed at the first mounting point 206. In this way, the first sensor 351 can detect the fluid pressure and temperature in the fifth sub-flow channel 280. Since the fifth sub-flow channel 280 is connected to the first working chamber 112 in sequence through the second main flow channel 220 and the intermediate cavity 121, the first sensor 351 can detect the fluid pressure and temperature in the first working chamber 112.

[0098] A second mounting point 207 may be provided above the valve seat 200. The second mounting point 207 is located above and connected to the sixth sub-flow channel 290. The second sensor 352 is installed at the second mounting point 207. In this way, the second sensor 352 can detect the fluid pressure and temperature in the sixth sub-flow channel 290. Since the sixth sub-flow channel 290 is connected to the second working chamber 113 through the third main flow channel 230, the second sensor 352 can detect the fluid pressure and temperature in the second working chamber 113.

[0099] In some specific embodiments of the present invention, such as Figure 1 and Figure 8As shown, the valve seat 200 is also provided with two oil injection nozzles 282, and the end of the fifth sub-flow channel 280 can be provided with a third installation point 281, and the end of the sixth sub-flow channel 290 can be provided with a fourth installation point 291. The two oil injection nozzles 282 can be respectively installed at the third installation point 281 and the fourth installation point 291 by threaded connection.

[0100] In some embodiments, such as Figure 1 As shown, the third mounting point 281 can be located above the fifth sub-channel 280, and the fourth mounting point 291 can be located above the sixth sub-channel 290. In other embodiments, such as Figure 8 As shown, the third installation point 281 can be located at the end of the fifth sub-channel 280, and the fourth installation point 291 can be located at the end of the sixth sub-channel 290.

[0101] In some specific embodiments of the present invention, such as Figure 3 and Figure 6 As shown, the first main channel 210, the second main channel 220, and the third main channel 230 are arranged radially at intervals along the valve seat 200. In this way, the first main channel 210, the second main channel 220, and the third main channel 230 will not interfere with each other in position, and it is convenient for the first main channel 210, the second main channel 220, and the third main channel 230 to connect with the oil storage chamber 131, the intermediate chamber 121, and the second working chamber 113 respectively in a one-to-one correspondence, resulting in a more reasonable layout structure.

[0102] In some specific embodiments of the present invention, such as Figure 6 As shown, the first main channel 210 and the second main channel 220 extend circumferentially along the valve seat 200, and at least part of the first main channel 210 and the second main channel 220 do not coincide in the radial projection of the valve seat 200. In other words, at least part of the first main channel 210 and the second main channel 220 are misaligned along the circumferential direction of the valve seat 200.

[0103] Specifically, the first main flow channel 210 needs to be connected to the first solenoid valve 310 through the first sub-flow channel 240, and the second main flow channel 220 needs to be connected to the first solenoid valve 310 through the second sub-flow channel 250. In other words, both the first and second main flow channels 210 and 220 need to be connected to the first solenoid valve 310, and the second main flow channel 220 also needs to be connected to the hydraulic unit 350 through the fifth sub-flow channel 280. By at least partially offsetting the first and second main flow channels 210 and 220 along the circumferential direction of the valve seat 200, it is convenient to connect the two main flow channels to the first solenoid valve 310 and the hydraulic unit 350 respectively, and the first and second main flow channels 210 and 220 can be arranged compactly.

[0104] Furthermore, the first main flow channel 210 can extend in an arc shape along the circumference of the valve seat 200, and the second main flow channel 220 can also extend in an arc shape along the circumference of the valve seat 200. Moreover, the first main flow channel 210 is connected to the first sub-flow channel 240 and the third sub-flow channel 260, respectively, and the second main flow channel 220 is connected to the second sub-flow channel 250 and the fifth sub-flow channel 280, respectively.

[0105] Furthermore, the first solenoid valve 310, the second solenoid valve 320, and the hydraulic unit 350 are arranged circumferentially along the valve seat 200. By extending the first main flow channel 210 and the second main flow channel 220 into annular shapes along the circumference of the valve seat 200, the dimensions of the first main flow channel 210 and the second main flow channel 220 along the circumference of the valve seat 200 can be relatively large. This facilitates the simultaneous connection of the first sub-flow channel 240 and the third sub-flow channel 260 with the first main flow channel 210, and the simultaneous connection of the second sub-flow channel 250 and the fifth sub-flow channel 280 with the second main flow channel 220.

[0106] In some specific embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the cylinder assembly 100 may include a working cylinder 110, which has a working chamber 111.

[0107] The cylinder assembly 100 may also include an intermediate cylinder 120, which is located radially outside the working cylinder 110, and an intermediate cavity 121 is formed between the intermediate cylinder 120 and the working cylinder 110.

[0108] The cylinder assembly 100 may also include an outer cylinder 130, which is located radially outside the intermediate cylinder 120, and an oil storage chamber 131 is formed between the outer cylinder 130 and the intermediate cylinder 120.

[0109] The outer cylinder 130 can be fixed to the valve seat 200 by welding, and the end cap 140 can be threaded to the end of the outer cylinder 130 away from the valve seat 200. In addition, the outer cylinder 130 can also be provided with an air inlet 135 in the circumferential direction. The air inlet 135 is welded to the outer cylinder 130 and can communicate with the first chamber 132 described below.

[0110] In addition, the shock absorber 1 also includes a support base 114, which can be connected to the valve seat 200 and is located above the first main channel 210. The working cylinder 110 is connected to the support base 114, and the second working chamber 113 can be connected to the first main channel 210 through the support base 114.

[0111] For example, such as Figure 2 and Figure 5 As shown, at least one connecting hole 122 may be provided on the intermediate cylinder 120, and the first working chamber 112 and the intermediate chamber 121 may be connected through the connecting hole 122.

[0112] In some specific embodiments of the present invention, such as Figure 2 As shown, the second piston assembly 400 may include a piston rod 410, a piston body 420, and an anti-collision assembly 430. The shock absorber 1 also includes a guide sealing assembly 500. The piston rod 410 passes through the guide sealing assembly 500. The piston body 420 divides the working chamber 111 into a first working chamber 112 and a second working chamber 113. The anti-collision assembly 430 is connected to the piston rod 410 and is located between the piston body 420 and the guide sealing assembly 500 to avoid the piston body 420 directly colliding with the guide sealing assembly 500 under the recovery condition.

[0113] In addition, such as Figure 2 and Figure 5 As shown, the guide sealing assembly 500 is located at the end of the cylinder assembly 100 away from the valve seat 200 to seal at least one of the working chamber 111, the intermediate chamber 121, and the oil storage chamber 131. For example, the guide sealing assembly 500 can seal one end of the first working chamber 112, one end of the intermediate chamber 121, and one end of the oil storage chamber 131. The piston rod 410 of the second piston assembly 400 passes through the guide sealing assembly 500. That is, the end of the working chamber 111 away from the valve seat 200, the end of the intermediate chamber 121 away from the valve seat 200, and the end of the oil storage chamber 131 away from the valve seat 200 can all be sealed by the guide sealing assembly 500.

[0114] Specifically, such as Figure 5 As shown, the guide sealing assembly 500 may include a first sealing seat 510, which can be positioned and installed on the end of the working cylinder 110 away from the valve seat 200. The side of the first sealing seat 510 facing the intermediate cylinder 120 is provided with a positioning groove 511, and a second sealing ring 512 can be engaged in the positioning groove 511. The second sealing ring 512 contacts and seals with the inner wall surface of the intermediate cylinder 120, thereby sealing the end of the intermediate cavity 121 away from the valve seat 200.

[0115] The guide sealing assembly 500 may further include a guide seat 520, a second sealing seat 530, and an oil seal 540. The guide seat 520 may be installed on the first sealing seat 510, and the second sealing seat 530 may be integrally installed on the guide seat 520. The inner wall surface of the guide seat 520 may be provided with a sliding bearing 550, which is press-fitted onto the guide seat 520 and cooperates with the piston rod 410 of the second piston assembly 400. The second sealing seat 530 may be provided with a third sealing ring 531, which is installed on the lower end face of the second sealing seat 530 and cooperates with the piston rod 410. The oil seal 540 may be installed on the side of the second sealing seat 530 facing away from the guide seat 520. Through the above arrangement, dynamic sealing of the working chamber 111 can be achieved.

[0116] In addition, the wire sealing assembly may also include a fourth sealing ring 560, which is installed in the mounting groove 532 on the radially outer side of the second sealing seat 530. The fourth sealing ring 560 mates with the inner wall surface of the outer cylinder 130, thereby completing the sealing of the oil reservoir.

[0117] In some specific embodiments of the present invention, such as Figure 2 and Figure 7 As shown, the shock absorber 1 also includes a first piston assembly 600.

[0118] The first piston assembly 600 is movably disposed within the oil reservoir 131, dividing the oil reservoir 131 into a first chamber 132 and a second chamber 133, with the second chamber 133 communicating with a flow channel. For example, the first piston assembly 600 can move axially along the cylindrical assembly 100, dividing the oil reservoir 131 into the first chamber 132 and the second chamber 133 along the axial direction of the cylindrical assembly 100. It is understood that the oil reservoir 131 is annular; that is, the first piston assembly 600 can be an annular piston assembly.

[0119] The first chamber 132 can be a gas chamber, and the second chamber 133 can be an oil chamber. That is, the first piston assembly 600 can divide the oil storage chamber 131 into a gas chamber and an oil chamber arranged along the axial direction of the cylinder, thereby achieving the purpose of oil-gas separation.

[0120] In this way, the first piston assembly 600 can float up and down as the internal oil pressure of the shock absorber 1 changes, and the entire oil storage chamber 131 forms an annular piston-type accumulator. This configuration can save a lot of space compared to an external piston-type accumulator, which is beneficial to reducing the overall volume of the shock absorber 1.

[0121] Specifically, when the shock absorber 1 is in compression mode, the second piston assembly 400 moves towards the valve seat 200, and the second working chamber 113, whose volume gradually decreases, discharges fluid into the oil storage chamber 131. The fluid in the oil storage chamber 131 replenishes the first working chamber 112, whose volume gradually increases. However, since the piston rod 410 intrudes into the first working chamber 112 during this process, the oil discharged from the second working chamber 113 is more than the oil replenished to the first working chamber 112. The excess oil is eventually stored in the second chamber 133 of the oil storage chamber 131. At this time, the first piston assembly 600 moves upward to compress the space of the first chamber 132 above it, and the air pressure in the first chamber 132 increases.

[0122] Conversely, when the shock absorber 1 is in the recovery state, the second piston assembly 400 moves upward and the piston rod 410 continuously moves out of the first working chamber 112. The space compressed in the first working chamber 112 is smaller than the space expanded in the second working chamber 113. Therefore, the oil storage chamber 131 needs to discharge oil to compensate for the volume change difference between the first working chamber 112 and the second working chamber 113. This process can be achieved by the air pressure in the first chamber 132 above the first piston assembly 600 pushing the first piston assembly 600 downward.

[0123] In some specific embodiments of the present invention, such as Figure 7 As shown, the first piston assembly 600 may include a piston body 610, a fifth sealing ring 620, and a sixth sealing ring 630. Both the sixth sealing ring 630 and the fifth sealing ring 620 can be annular. The sixth sealing ring 630 contacts and seals with the inner wall surface of the outer cylinder 130, and the fifth sealing ring 620 contacts and seals with the outer wall surface of the intermediate cylinder 120. Additionally, a groove 611 may be provided on the side of the piston body 610 facing the valve seat 200. Adding the groove 611 increases the contact area between the piston body 610 and the fluid, thereby improving the stability of the first piston assembly 600 when subjected to fluid impact.

[0124] In some specific embodiments of the present invention, such as Figure 2 As shown, the shock absorber 1 also includes a limiting member 134.

[0125] The limiting member 134 is located at one end of the second chamber 133 near the valve seat 200. The limiting member 134 is adapted to contact the first piston assembly 600 to impede the movement of the first piston assembly 600.

[0126] Specifically, the limiting member 134 is disposed in the second chamber 133. When the first piston assembly 600 moves towards the valve seat 200 and stops against the limiting member 134, the first piston assembly 600 moves to its limit position. At this time, the limiting member 134 can prevent the first piston assembly 600 from continuing to move towards the valve seat 200. The limiting member 134 can be welded to the outer wall of the intermediate cylinder 120, and / or, the limiting member 134 can also be welded to the inner wall of the outer cylinder 130.

[0127] In addition, the guide sealing assembly 500 may be provided with a limiting boss (not shown in the figure). For example, the lower side of the second sealing seat 530 is provided with a limiting boss. When the first piston assembly 600 moves to the limit position in the direction close to the guide sealing assembly 500, the first piston assembly 600 can be stopped by the limiting boss. Furthermore, the upper limit position of the first piston assembly 600 can be customized by changing the length of the limiting boss during the design process, thereby limiting the maximum compression volume of the first chamber 132.

[0128] By setting the limiting member 134 and the limiting boss, the upper and lower limit positions of the first piston assembly 600 can be limited, that is, the stroke of the first piston assembly 600 can be limited, which also limits the maximum and minimum volume of the first chamber 132. This stroke can be customized to match different vehicle models. Moreover, due to the existence of the upper and lower limits and the constraints of the outer wall surface of the intermediate cylinder 120 and the inner wall surface of the outer cylinder 130, the movement path of the first piston assembly 600 is an annular space that matches its shape. The first piston assembly 600 will not jam, thus avoiding its failure as an accumulator.

[0129] In some specific embodiments of the present invention, such as Figures 1-3 and Figure 8 As shown, the shock absorber 1 may also be provided with a fork 700 and a fork connecting cylinder 710. The fork connecting cylinder 710 can be welded to the bottom of the valve seat 200. For example, the fork connecting cylinder 710 can be positioned by the circular boss 208 below the valve seat 200 and connected by welding. The fork 700 can be fixed to the fork connecting cylinder 710 by the second bolt 720.

[0130] The following description, with reference to the accompanying drawings, describes the fluid flow path under the recovery and compression conditions of the vibration damper 1 according to an embodiment of the present invention.

[0131] When the shock absorber 1 is in the recovery condition, the fluid in the first working chamber 112 can flow through the intermediate chamber 121 to the second main channel 220. The fluid is divided into two parts in the second main channel 220. One part of the fluid flows into the second working chamber 113 through the second sub-channel 250, the first solenoid valve 310, the first sub-channel 240, the first main channel 210, the oil storage chamber 131, the first main channel 210, the third sub-channel 260, the second solenoid valve 320, the fourth sub-channel 270, and the third main channel 230 in sequence. The other part of the fluid can flow into the second working chamber 113 through the fifth sub-channel 280, the hydraulic unit 350, the sixth sub-channel 290, and the third main channel 230 in sequence. At this time, the recovery damping force of the shock absorber 1 can be adjusted by the first solenoid valve 310 and the hydraulic unit 350 respectively.

[0132] When the shock absorber 1 is in compression mode, the fluid in the second working chamber 113 can flow to the third main channel 230, and the fluid is divided into two in the third main channel 230. One part of the fluid can flow into the first working chamber 112 in sequence through the fourth sub-channel 270, the second solenoid valve 320, the third sub-channel 260, the first main channel 210, the oil storage chamber 131, the first main channel 210, the first sub-channel 240, the first solenoid valve 310, the second sub-channel 250, the second main channel 220 and the intermediate chamber 121. The other part of the fluid can flow into the first working chamber 112 in sequence through the sixth sub-channel 290, the hydraulic unit 350, the fifth sub-channel 280, the second main channel 220 and the intermediate chamber 121. At this time, the compression damping force of the shock absorber 1 can be adjusted by the second solenoid valve 320 and the hydraulic unit 350 respectively.

[0133] The following description, with reference to the accompanying drawings, describes a suspension according to an embodiment of the present invention, which includes a shock absorber 1 according to the above embodiment of the present invention.

[0134] According to the embodiments of the present invention, the suspension, by utilizing the shock absorber 1 of the present invention as described above, can utilize the adjustment valve group 300 and the hydraulic unit 350 to work together to divert fluid, thereby achieving more precise damping adjustment and active control capabilities, and also has the advantage of convenient assembly.

[0135] The following description, with reference to the accompanying drawings, describes a vehicle according to an embodiment of the present invention, the vehicle including a suspension according to the above-described embodiment of the present invention.

[0136] The vehicle according to the embodiments of the present invention, by utilizing the suspension according to the above embodiments of the present invention, can utilize the adjustment valve group 300 and the hydraulic unit 350 to work together to divert fluid, making the damping adjustment and active control capabilities more precise, and has the advantages of fast response, high efficiency, high reliability and convenient assembly.

[0137] The shock absorber 1, suspension, and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0138] In the description of this specification, references to terms such as "specific embodiment" or "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0139] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration damper (1), characterized in that, include: A cylindrical assembly (100) is provided with a working chamber (111). A valve seat (200) is connected to one end of the cylinder assembly (100). The valve seat (200) is constructed with a flow channel. A regulating valve group (300) and a hydraulic unit (350) are provided on the valve seat (200). The regulating valve group (300) and the hydraulic unit (350) are respectively connected to the working chamber (111) through the flow channel.

2. The vibration damper (1) according to claim 1, characterized in that, The working chamber (111) includes a first working chamber (112) and a second working chamber (113) arranged along the axial direction of the cylindrical assembly (100). The regulating valve group (300) and the hydraulic unit (350) are respectively connected to the first working chamber (112) and the second working chamber (113) through the flow channel. When the shock absorber (1) is in the recovery condition, the fluid in the first working chamber (112) flows to the second working chamber (113) through the regulating valve group (300) and the hydraulic unit (350). When the damper (1) is in compression condition, the fluid in the second working chamber (113) flows to the first working chamber (112) through the regulating valve group (300) and the hydraulic unit (350).

3. The vibration damper (1) according to claim 2, characterized in that, The cylindrical assembly (100) is further provided with: An intermediate cavity (121) is provided, one end of which is connected to the first working cavity (112), and the other end of which is connected to the flow channel. Oil storage chamber (131) is connected to the flow channel.

4. The vibration damper (1) according to claim 3, characterized in that, The flow channel includes: The first main channel (210) has one end connected to the oil storage chamber (131) and the other end connected to the regulating valve group (300). The second main channel (220) has one end connected to the intermediate cavity (121) and the other end connected to the regulating valve group (300) and the hydraulic unit (350) respectively. The third main channel (230) is connected at one end to the second working chamber (113) and at the other end to the regulating valve group (300) and the hydraulic unit (350).

5. The vibration damper (1) according to claim 4, characterized in that, The regulating valve assembly (300) is used to regulate the flow rate of fluid from the second main channel (220) to the first main channel (210); and / or, The regulating valve assembly (300) is used to regulate the flow rate of fluid from the third main channel (230) to the first main channel (210).

6. The vibration damper (1) according to claim 5, characterized in that, The regulating valve assembly (300) includes: A first solenoid valve (310) is connected to the valve seat (200). The first solenoid valve (310) connects the first main channel (210) and the second main channel (220). The first solenoid valve (310) is used to regulate the flow rate of fluid flowing from the second main channel (220) to the first main channel (210). The second solenoid valve (320) is connected to the valve seat (200) and connects the first main channel (210) and the third main channel (230). The second solenoid valve (320) is used to regulate the flow rate of fluid flowing from the third main channel (230) to the first main channel (210).

7. The vibration damper (1) according to claim 6, characterized in that, The flow channel also includes: The first sub-flow channel (240) is connected to the first main flow channel (210) and the first solenoid valve (310). The second sub-channel (250) connects the second main channel (220) and the first solenoid valve (310). The third sub-channel (260) is connected to the first main channel (210) and the second solenoid valve (320). The fourth sub-channel (270) is connected to the third main channel (230) and the second solenoid valve (320).

8. The vibration damper (1) according to claim 4, characterized in that, The flow channel also includes: The fifth sub-flow channel (280) connects the second main flow channel (220) and the hydraulic unit (350). The sixth sub-channel (290) connects the third main channel (230) and the hydraulic unit (350).

9. The vibration damper (1) according to claim 8, characterized in that, Also includes: A first sensor (351) is disposed on the valve seat (200) and located in the fifth sub-flow channel (280). The first sensor (351) is used to detect the fluid pressure and temperature within the fifth sub-flow channel (280); and / or, The second sensor (352) is disposed on the valve seat (200) and located in the sixth sub-channel (290). The second sensor (352) is used to detect the fluid pressure and temperature in the sixth sub-channel (290).

10. The vibration damper (1) according to claim 4, characterized in that, The first main channel (210), the second main channel (220), and the third main channel (230) are arranged radially at intervals along the valve seat (200); and / or, The first main channel (210) and the second main channel (220) extend circumferentially along the valve seat (200), and the first main channel (210) and the second main channel (220) do not overlap at least partially along the radial projection of the valve seat (200).

11. The vibration damper (1) according to claim 3, characterized in that, The cylindrical assembly (100) includes: Working cylinder (110), the working cylinder (110) is provided with the working chamber (111); An intermediate cylinder (120) is disposed radially outside the working cylinder (110), and an intermediate cavity (121) is formed between the intermediate cylinder (120) and the working cylinder (110); and / or, An outer cylinder (130) is located radially outside the intermediate cylinder (120), and an oil storage chamber (131) is formed between the outer cylinder (130) and the intermediate cylinder (120).

12. The vibration damper (1) according to claim 3, characterized in that, Also includes: A first piston assembly (600) is movably disposed within the oil reservoir (131). The first piston assembly (600) divides the oil reservoir (131) into a first chamber (132) and a second chamber (133). The second chamber (133) communicates with the flow channel. A limiting member (134) is provided at one end of the second chamber (133) near the valve seat (200), and the limiting member (134) is adapted to contact the first piston assembly (600) to impede the movement of the first piston assembly (600).

13. The vibration damper (1) according to claim 1, characterized in that, At least a portion of the control valve assembly (300) and at least a portion of the hydraulic unit (350) are arranged at circumferential intervals along the valve seat (200).

14. A suspension system, characterized in that, Includes the damper (1) according to any one of claims 1-13.

15. A vehicle, characterized in that, Including the suspension as described in claim 14.

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