A flow control valve and vibration damper

Abstract

This invention belongs to the field of vibration damper technology and discloses a flow-dividing control valve and a vibration damper. The flow-dividing control valve is connected to a vibration damper, which has an upper chamber, a lower chamber, and a low-pressure chamber. The flow-dividing control valve includes a recovery chamber, a compression chamber, a manifold chamber, a recovery valve assembly, a compression valve assembly, and a control valve assembly. The recovery chamber communicates with the upper chamber of the vibration damper, and the compression chamber communicates with the lower chamber. The recovery chamber and the manifold chamber are connected or disconnected via the recovery valve assembly, and the compression chamber and the manifold chamber are connected or disconnected via the compression valve assembly. The control valve assembly is used to adjust the flow area between the manifold chamber and the low-pressure chamber of the vibration damper. The flow-dividing control valve and vibration damper provided by this invention can achieve independent adjustment of the damping force during the recovery and compression strokes, while also having a compact structure, high integration, and low production, manufacturing, and maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of vibration damper technology, and more particularly to a flow control valve and a vibration damper. Background Technology

[0002] Shock absorbers are the core components of the suspension system, used to dampen vehicle vibrations, suppress spring rebound, and ensure smooth vehicle ride, tire contact with the ground, and stable handling. The working principle of a shock absorber is as follows: the internal piston assembly moves up and down (during the recovery and compression strokes), causing internal oil to repeatedly flow from the inner cylinder through different chambers or channels into the low-pressure chamber. The resistance generated by the oil flow creates damping force, converting the mechanical energy of vehicle vibrations into heat energy, thus rapidly damping vibrations. The flow control valve is the internal flow control and damping adjustment mechanism of the shock absorber. By controlling the flow path, flow area, or on / off state of the oil, it allows for adjustable and controllable damping force at different strokes and speeds.

[0003] In related technologies, some shock absorbers employ a single external valve structure. This means that fluid flows through a through-hole in the inner cylinder and an outer intermediate cylinder to an external solenoid valve, which controls the force. In this single external valve structure, the fluid flows through the same solenoid valve during both the compression and recovery strokes, making it impossible to adjust the damping force independently for each stroke. Other shock absorbers employ a double external valve structure. This involves through-holes at the top and bottom of the inner cylinder, connecting to separate upper and lower intermediate cylinders. Fluid flows through these cylinders to the upper and lower solenoid valves, respectively. The upper solenoid valve independently controls the recovery damping force, while the lower solenoid valve independently controls the compression damping force, allowing for independent adjustment of the damping force during the recovery and compression strokes. However, this type of shock absorber with dual external valves has several drawbacks. First, it requires two sets of valve groups, an upper solenoid valve and a lower solenoid valve, forming a multi-cavity, multi-channel structure. This results in a complex structure, low integration, and large space occupation, which is not conducive to the compact layout of the suspension system. Second, because there are two sets of solenoid valve groups, the dual oil circuits and dual valve groups need to be assembled, debugged, and tested separately, which results in longer assembly time, more complicated testing procedures, and higher production, manufacturing, and maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide a flow control valve and a vibration damper that can independently adjust the damping force of the recovery stroke and the compression stroke, while having a compact structure, high integration, and low production, manufacturing and maintenance costs.

[0005] To achieve this objective, the present invention adopts the following technical solution: On one hand, a flow control valve is provided for connection to a shock absorber. The shock absorber is provided with an upper chamber, a lower chamber, and a low-pressure chamber. The flow control valve includes a recovery chamber, a compression chamber, a manifold chamber, a recovery valve assembly, a compression valve assembly, and a control valve assembly. The recovery chamber is used to communicate with the upper chamber of the shock absorber, and the compression chamber is used to communicate with the lower chamber of the shock absorber. The recovery chamber and the manifold chamber are connected or disconnected through the recovery valve assembly, and the compression chamber and the manifold chamber are connected or disconnected through the compression valve assembly. The control valve assembly is used to adjust the flow area between the manifold chamber and the low-pressure chamber of the shock absorber.

[0006] Preferably, the recovery valve assembly includes a recovery valve cavity, which is connected to a recovery chamber and a manifold chamber respectively. The recovery valve cavity has a first opening on the side near the manifold chamber, and a first valve plate group is provided at the first opening. The first valve plate group is configured to be elastic. When the difference between the hydraulic pressure on the side of the recovery valve cavity and the hydraulic pressure on the side of the manifold chamber is greater than a preset recovery damping force, the first valve plate group can undergo elastic deformation to open the first opening. When the difference between the hydraulic pressure on the side of the recovery valve cavity and the hydraulic pressure on the side of the manifold chamber is less than or equal to the preset recovery damping force, the first valve plate group can close the first opening. And / or, the compression valve assembly includes a compression valve cavity, which is connected to a compression chamber and a manifold chamber respectively. The compression valve cavity has a second opening on the side near the manifold chamber, and a second valve plate assembly is provided at the second opening. The second valve plate assembly is configured to be elastic. When the difference between the hydraulic pressure on the side of the compression valve cavity and the hydraulic pressure on the side of the manifold chamber is greater than a preset compression damping force, the second valve plate assembly can undergo elastic deformation to open the second opening. When the difference between the hydraulic pressure on the side of the compression valve cavity and the hydraulic pressure on the side of the manifold chamber is less than or equal to the preset compression damping force, the second valve plate assembly can close the second opening.

[0007] Preferably, the first valve plate group includes a plurality of first regulating valve plates that are sequentially attached, and at least two of the plurality of first regulating valve plates have different diameters and / or thicknesses; The second valve plate group includes a plurality of second regulating valve plates that are sequentially bonded together, and at least two of the plurality of second regulating valve plates have different diameters and / or thicknesses.

[0008] Preferably, the recovery valve assembly is provided with a first throttling groove, which is connected to the recovery chamber and the manifold chamber respectively; The compression valve assembly has a second throttling groove, which is connected to the compression chamber and the manifold chamber respectively.

[0009] Preferably, the first valve plate group further includes a restoring one-way valve plate, which can undergo elastic deformation to open or close the first throttling groove; The second valve assembly includes a compression check valve, which can undergo elastic deformation to open or close the second throttling groove.

[0010] Preferably, the flow control valve further includes an overflow valve and a support valve. The overflow valve is disposed between the recovery valve assembly and the compression valve assembly, and the support valve is disposed between the compression valve assembly and the control valve assembly. The manifold includes a recovery overflow chamber, a compression valve outer cavity, and a support valve cavity that are connected in sequence. The recovery overflow chamber is disposed on the overflow valve, and the compression valve outer cavity is disposed on the compression valve assembly.

[0011] Preferably, the diversion control valve further includes a diversion valve assembly, which is used to be disposed between the shock absorber and the recovery valve assembly. The compression chamber includes a diversion valve outer cavity, a recovery valve outer cavity, and a compression flow chamber. The diversion valve outer cavity is disposed on the diversion valve assembly, the recovery valve outer cavity is disposed on the recovery valve assembly, and the compression flow chamber is disposed on the flow valve.

[0012] Preferably, the diversion valve assembly includes a diversion valve body, a recovery compensation valve plate, and an elastic element. The diversion valve assembly also includes a diversion valve inner cavity, which is connected to the recovery cavity and the recovery valve inner cavity respectively. The diversion valve body is also provided with a recovery compensation through hole, which is used to connect with the low-pressure cavity of the shock absorber and the diversion valve inner cavity. The recovery compensation valve plate and the elastic element are both disposed in the diversion valve inner cavity. One end of the elastic element abuts against the recovery compensation valve plate, and the other end of the elastic element abuts against the recovery valve assembly. The elastic element can extend or compress so that the recovery compensation valve plate closes or opens the recovery compensation through hole.

[0013] Preferably, the flow control valve also includes a valve sleeve, which is used to be fixedly connected to the outer cylinder of the shock absorber. The valve sleeve is provided with an overflow chamber, which can be connected to the low-pressure chamber of the shock absorber and the chamber of the control valve assembly respectively.

[0014] On the other hand, a shock absorber is provided, comprising an inner cylinder, an intermediate cylinder, and an outer cylinder arranged coaxially from the inside to the outside, a piston assembly slidably disposed in the cavity of the inner cylinder, and a flow control valve of any of the above technical solutions. The piston body of the piston assembly divides the cavity of the inner cylinder into an upper cavity and a lower cavity. The cylinder wall of the intermediate cylinder and the cylinder wall of the outer cylinder enclose a low-pressure cavity. The intermediate cylinder includes an upper intermediate cylinder and a lower intermediate cylinder. The upper intermediate cylinder and the lower intermediate cylinder enclose the cylinder wall of the inner cylinder to form an upper intermediate cavity and a lower intermediate cavity, respectively. The upper intermediate cavity is connected to the upper cavity and the recovery cavity, respectively, and the lower intermediate cavity is connected to the lower cavity and the compression cavity, respectively.

[0015] The beneficial effects of this invention are as follows: A flow divider control valve and controller are provided. During the compression stroke of the shock absorber, oil enters the compression chamber of the flow divider control valve from the lower intermediate chamber of the shock absorber. The oil acts on the compression valve assembly, connecting the compression chamber and the manifold. After the oil flows into the manifold through the compression valve assembly, the flow area between the manifold and the low-pressure chamber is adjusted by the control valve assembly, thereby adjusting the damping of the compression oil circuit and realizing adjustable compression damping force. At this time, under the action of the recovery valve assembly, the connection between the recovery chamber and the manifold before the recovery valve assembly is disconnected.

[0016] During the recovery stroke of the shock absorber, the oil enters the recovery chamber of the flow control valve from the upper intermediate chamber of the shock absorber. The oil acts on the recovery valve assembly, connecting the recovery chamber and the manifold. The oil flows into the manifold through the recovery valve assembly. The flow area between the manifold and the low-pressure chamber is adjusted by the control valve assembly, thus achieving adjustable recovery damping force. At this time, under the action of the compression valve assembly, the connection between the compression chamber and the manifold before the recovery valve assembly is broken.

[0017] By integrating the recovery valve assembly, compression valve assembly, and control valve assembly of the flow control valve, the compression stroke and recovery stroke share the same manifold and the same control valve assembly. However, the recovery valve assembly and the compression valve assembly are independent of each other, unidirectionally connected, and do not interfere with each other. Thus, under the premise of sharing a single control valve, the recovery damping and compression damping can be decoupled and adjusted. The recovery damping force and compression damping force are independently adjustable, and the damping characteristic curve is more flexible to adapt to different working conditions.

[0018] Meanwhile, by integrating the recovery valve assembly, compression valve assembly, and control valve assembly into the same diversion control valve, compared to the vibration damper with a dual external valve structure, the number of parts is reduced, the structure of the vibration damper is simplified, the weight of the vibration damper is reduced, and the overall arrangement of the vibration damper is facilitated, while reducing production and manufacturing costs and control difficulty. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the flow control valve and vibration damper provided by the present invention; Figure 2 This is a schematic diagram of the flow control valve provided by the present invention; Figure 3 This is an isometric view of the recovery valve assembly provided by the present invention; Figure 4 This is a cross-sectional view of the recovery valve assembly provided by the present invention; Figure 5 This is a first-view isometric view of the restoration valve body of the restoration valve assembly provided by the present invention; Figure 6 This is a second-view isometric view of the restoration valve body of the restoration valve assembly provided by the present invention; Figure 7This is a schematic diagram of the structure of the first regulating valve plate of the recovery valve assembly provided by the present invention; Figure 8 This is a schematic diagram of the structure of the recovery one-way valve plate of the recovery valve assembly provided by the present invention; Figure 9 This is a cross-sectional view of the compression valve assembly provided by the present invention; Figure 10 This is an isometric view of the compression valve body of the compression valve assembly provided by the present invention; Figure 11 This is a first-view structural schematic diagram of the overflow valve provided by the present invention; Figure 12 This is a second-view structural schematic diagram of the overflow valve provided by the present invention; Figure 13 This is a first-view isometric view of the adapter valve provided by the present invention; Figure 14 This is a second-view isometric view of the adapter valve provided by the present invention; Figure 15 This is a first-view isometric view of the drainage valve assembly provided by the present invention; Figure 16 This is a second-view isometric view of the drainage valve assembly provided by the present invention; Figure 17 This is a cross-sectional view of the drainage valve assembly provided by the present invention; Figure 18 This is an isometric view of the valve sleeve provided by the present invention; Figure 19 This is a schematic diagram of the oil flow in the flow control valve and shock absorber recovery stroke provided by the present invention. Figure 20 This is a schematic diagram of the oil flow in the compression stroke of the flow control valve and shock absorber provided by the present invention; Figure 21 This is a schematic diagram of the oil flow in the upper cavity of the flow control valve and damper during the compression stroke provided by the present invention.

[0020] In the picture: 110. Upper chamber; 120. Lower chamber; 130. Upper intermediate chamber; 140. Lower intermediate chamber; 150. Low-pressure chamber; 160. Inner cylinder; 161. Upper through hole; 162. Lower through hole; 170. Upper intermediate cylinder; 180. Lower intermediate cylinder; 190. Outer cylinder; 200. Piston assembly; 1. Restoration chamber; 2. Compression chamber; 3. Manifold chamber; 4. Overflow chamber; 5. Restoration valve assembly; 51. Restoration valve body; 511. Restoration valve through hole; 52. First valve plate assembly; 521. First regulating valve plate; 5211. First throttling groove; 522. Restoration one-way valve plate; 53. First fastening nut; 54. First fastening bolt; 55. Restoration valve outer flange; 56. Restoration one-way outer flange; 57. Restoration one-way inner flange; 58. Restoration valve inner cavity; 59. Restoration valve outer cavity; 6. Compression valve assembly; 61. Compression valve body; 611. Compression valve through hole; 62. Second valve plate assembly; 621. Second regulating valve plate; 622. Compression one-way valve plate; 63. Second fastening nut; 64. Second fastening bolt; 65. Compression valve outer flange; 66. Compression one-way outer flange; 67. Compression one-way inner flange; 68. Compression valve inner cavity; 69. Compression valve outer cavity; 7. Overflow valve; 71. Restored overflow chamber; 72. Compression overflow chamber; 8. Drainage valve assembly; 81. Drainage valve body; 811. Restoration compensation through hole; 82. Drainage valve inner cavity; 83. Drainage valve outer cavity; 84. Restoration inlet; 85. Compression inlet; 86. Restoration compensation valve plate; 87. Elastic element; 88. Restoration compensation inner flange; 89. Restoration compensation outer flange; 9. Valve sleeve; 91. Flanged structure; 92. Axial through hole; 10. Control valve assembly; 11. Adapter valve; 111. Restoration flow orifice; 112. Compression flow orifice; 113. First receiving groove; 114. Second receiving groove; 115. Sealing groove; 12. Support valve. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not 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 the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0025] On the one hand, please refer to Figure 1 and Figure 2 This embodiment provides a flow control valve for connection to a vibration damper. The vibration damper has an upper chamber 110, a lower chamber 120, and a low-pressure chamber 150. The flow control valve includes a recovery chamber 1, a compression chamber 2, a manifold chamber 3, a recovery valve assembly 5, a compression valve assembly 6, and a control valve assembly 10. The recovery chamber 1 communicates with the upper chamber 110 of the vibration damper, and the compression chamber 2 communicates with the lower chamber 120 of the vibration damper. The recovery chamber 1 and the manifold chamber 3 are connected or disconnected through the recovery valve assembly 5, and the compression chamber 2 and the manifold chamber 3 are connected or disconnected through the compression valve assembly 6. The control valve assembly 10 is used to adjust the flow area between the manifold chamber 3 and the low-pressure chamber 150 of the vibration damper. Specifically, the control valve assembly 10 includes a solenoid valve.

[0026] With this configuration, during the compression stroke of the shock absorber, the oil enters the compression chamber 2 of the flow control valve from the lower intermediate chamber 140 of the shock absorber. The oil acts on the compression valve assembly 6, connecting the compression chamber 2 and the manifold 3. After flowing into the manifold 3 through the compression valve assembly 6, the flow area between the manifold 3 and the low-pressure chamber 150 is adjusted by the control valve assembly 10, thereby adjusting the damping of the compression oil circuit and achieving adjustable compression damping force. At this time, under the action of the recovery valve assembly 5, the connection between the recovery chamber 1 and the manifold 3 before the recovery valve assembly 5 is disconnected.

[0027] During the recovery stroke of the shock absorber, the oil enters the recovery chamber 1 of the flow control valve from the upper intermediate chamber 130 of the shock absorber. The oil acts on the recovery valve assembly 5, making the recovery chamber 1 and the manifold 3 connected. The oil flows into the manifold 3 through the recovery valve assembly 5. The flow area between the manifold 3 and the low-pressure chamber 150 is adjusted by the control valve assembly 10 to achieve adjustable recovery damping force. At this time, under the action of the compression valve assembly 6, the connection between the compression chamber 2 and the manifold 3 before the recovery valve assembly 5 is disconnected.

[0028] By integrating the recovery valve assembly 5, compression valve assembly 6, and control valve assembly 10 of the flow control valve, the compression stroke and the recovery stroke share the same manifold 3 and the same control valve assembly 10. However, the recovery valve assembly 5 and the compression valve assembly 6 are independent, unidirectional, and do not interfere with each other. Thus, under the premise of sharing a single control valve, the recovery damping and compression damping can be decoupled and adjusted. The recovery damping force and the compression damping force are independently adjustable, and the damping characteristic curve is more flexible to adapt to different working conditions.

[0029] Meanwhile, the recovery valve assembly 5, compression valve assembly 6 and control valve assembly 10 are integrated into the same diversion control valve. Compared with the vibration damper with a dual external valve structure, this reduces the number of parts, simplifies the structure of the vibration damper, reduces the weight of the vibration damper, facilitates the overall arrangement of the vibration damper, and reduces the production and manufacturing costs and control difficulty.

[0030] Alternatively, please refer to Figures 3 to 6 The recovery valve assembly 5 includes a recovery valve cavity 58, which is connected to the recovery cavity 1 and the manifold 3. The recovery valve cavity 58 has a first opening on the side near the manifold 3. A first valve plate group 52 is provided at the first opening. The first valve plate group 52 is configured to be elastic. When the difference between the hydraulic pressure on the side of the recovery valve cavity 58 and the hydraulic pressure on the side of the manifold 3 is greater than the preset recovery damping force, the first valve plate group 52 can undergo elastic deformation to open the first opening. When the difference between the hydraulic pressure on the side of the recovery valve cavity 58 and the hydraulic pressure on the side of the manifold 3 is less than or equal to the preset recovery damping force, the first valve plate group 52 can close the first opening.

[0031] Furthermore, the first valve plate group 52 includes a plurality of first regulating valve plates 521 that are sequentially attached to each other, and at least two of the plurality of first regulating valve plates 521 have different diameters and / or thicknesses.

[0032] Specifically, the recovery valve assembly 5 includes a recovery valve body 51, a first valve plate group 52, and a first limiting member. The first limiting member is detachably connected to the recovery valve body 51. A recovery valve outer flange 55 is provided on the side of the recovery valve body 51 near the first limiting member. The recovery valve outer flange 55 and the recovery valve body 51 enclose the recovery valve inner cavity 58. A recovery valve through hole 511 is also provided on the recovery valve body 51. The recovery valve through hole 511 connects the recovery cavity 1 and the recovery valve inner cavity 58. The first valve plate group 52 includes multiple first adjusting valve plates 521. The multiple first adjusting valve plates 521 can be selected in different combinations to abut against the recovery valve outer flange 55 and the first limiting member. All of the multiple first adjusting valve plates 521 can undergo elastic deformation.

[0033] With this configuration, when the shock absorber is in its recovery stroke, the oil flows through the recovery valve through-hole 511, enters the recovery valve inner cavity 58, and exerts a force on the first valve plate assembly 52. ​​When the oil pressure overcomes the elastic preload of the first valve plate assembly 52, the first regulating valve plate 521 undergoes elastic deformation and opens, allowing the oil to flow through the gap between the first valve plate assembly 52 and the outer flange 55 of the recovery valve, forming recovery damping. When the shock absorber is in its compression stroke, the high-pressure oil flowing into the compression chamber 2 passes through the side of the first valve plate assembly 52 away from the recovery valve body 51. At this time, under the hydraulic pressure of the high-pressure oil, the first valve plate assembly 52 tightly adheres to the outer flange 55 of the recovery valve, preventing the high-pressure oil from flowing into the recovery chamber 1.

[0034] Multiple first regulating valve plates 521 can be selected in different combinations to abut against the outer flange 55 of the recovery valve and the first limiting member. By selecting different numbers, diameters, thicknesses or stiffnesses of the first regulating valve plates 521 to abut against the outer flange 55 of the recovery valve and the first limiting member, the opening pressure and flow characteristics of the first valve plate group 52 can be changed, thereby presetting the recovery damping force and flexibly adjusting the opening pressure, flow characteristics and damping curve of the recovery valve assembly 5 to meet the vibration reduction requirements of different vehicle models and different working conditions.

[0035] Specifically, the recovery valve body 51 is provided with a first connecting hole, the first limiting member is a first fastening nut 53, the recovery valve assembly 5 also includes a first fastening bolt 54, the first fastening bolt 54 passes through the first connecting hole and the first valve plate group 52, and the first fastening nut 53 is screwed onto the first fastening bolt 54 so that the first valve plate group 52 is limited between the recovery valve body 51 and the first fastening nut 53.

[0036] Preferably, the recovery valve body 51 is provided with a plurality of recovery valve through holes 511, and the plurality of recovery valve through holes 511 are distributed at intervals along the circumference of the connecting hole.

[0037] Further, please refer to Figure 4 and Figure 7The recovery valve assembly 5 has a first throttling groove 5211, which is connected to the recovery chamber 1 and the manifold chamber 3. This configuration creates a normally open throttling channel between the recovery chamber 1 and the manifold chamber 3. When encountering minor road bumps or slow braking, the shock absorber needs to recover at low speed. At this time, the oil flow rate is slow and the pressure is low, making it impossible to push open the first valve plate assembly 52. ​​The oil flows from the recovery chamber 1 to the manifold chamber 3 through the first throttling groove 5211, generating a small and linear damping force. This prevents the vehicle from experiencing harsh vibrations, which could impact the vehicle body and affect the comfort of the shock absorption.

[0038] In this embodiment, the first throttling groove 5211 is formed in a plurality of first regulating valve plates 521, on one of the first regulating valve plates 521 that is far away from the manifold 3.

[0039] Preferably, multiple first throttling grooves 5211 are provided, and the multiple first throttling grooves 5211 are distributed at intervals along the circumference of the first regulating valve plate 521. This arrangement allows the oil to flow evenly in the circumferential direction of the first regulating valve plate 521 and the pressure distribution to be balanced, avoiding uneven wear, warping or jamming of the first regulating valve plate 521 due to uneven force on one side, thereby improving the working stability and service life of the first regulating valve plate 521.

[0040] In other embodiments, the first throttling groove 5211 may also be formed on the outer flange 55 of the recovery valve.

[0041] Furthermore, please refer to Figure 8 The first valve plate group 52 also includes a restoring one-way valve plate 522, which can undergo elastic deformation to open or close the first throttling groove 5211. Specifically, the restoring valve body 51 has a restoring one-way outer flange 56 and a restoring one-way inner flange 57 concentrically arranged on the side near the restoring valve outer flange 55. The restoring valve through hole 511 is located between the restoring one-way outer flange 56 and the restoring one-way inner flange 57. The restoring one-way valve plate 522 is in contact with the restoring one-way outer flange 56 and the restoring one-way inner flange 57, and the restoring one-way valve plate 522 can undergo elastic deformation. With this configuration, when the shock absorber is in the compression stroke, under the action of reverse oil pressure, the first regulating valve plate 521 tightly fits against the outer flange 55 of the restoration valve, and the restoration one-way valve plate 522 tightly fits against the outer flange 56 and the inner flange 57 of the restoration one-way valve. This ensures that the channel formed by the first throttling groove 5211 and the through hole 511 of the restoration valve is reliably closed, preventing the oil from flowing in reverse and achieving decoupling control between the restoration oil circuit and the compression oil circuit.

[0042] In this embodiment, the recovery check valve plate 522 has a hollow structure. During the recovery stroke, the opening stiffness of the recovery check valve plate 522 can be reduced.

[0043] In other embodiments, a throttling hole can be made on the fastening bolt, and a steel column and a return spring can be installed in the throttling hole to achieve a one-way flow obstruction effect.

[0044] Similarly, please refer to Figure 9 and Figure 10 The compression valve assembly 6 includes a compression valve cavity 68, which is connected to the compression chamber 2 and the manifold 3. The compression valve cavity 68 has a second opening on the side near the manifold 3. A second valve plate group 62 is provided at the second opening. The second valve plate group 62 is configured to be elastic. When the difference between the hydraulic pressure on the side of the compression valve cavity 68 and the hydraulic pressure on the side of the manifold 3 is greater than the preset compression damping force, the second valve plate group 62 can undergo elastic deformation to open the second opening. When the difference between the hydraulic pressure on the side of the compression valve cavity 68 and the hydraulic pressure on the side of the manifold 3 is less than or equal to the preset compression damping force, the second valve plate group 62 can close the second opening.

[0045] Specifically, the compression valve assembly 6 is located on the side of the recovery valve assembly 5 where the first valve plate group 52 is provided. The compression valve assembly 6 includes a compression valve body 61, a second valve plate group 62, and a second limiting member. The second limiting member is detachably connected to the compression valve body 61. The compression valve body 61 is provided with a compression valve outer flange 65 on the side near the second limiting member. The compression valve outer flange 65 and the compression valve body 61 enclose and form a compression valve inner cavity 68. A compression valve through hole 611 is also provided on the compression valve body 61. The compression valve through hole 611 connects the compression chamber 2 and the compression valve inner cavity 68.

[0046] Furthermore, the second valve plate group 62 includes a plurality of second regulating valve plates 621 that are sequentially attached, and at least two of the plurality of second regulating valve plates 621 have different diameters and / or thicknesses.

[0047] With this configuration, multiple second regulating valve plates 621 can be selected in different combinations to abut against the outer flange 65 of the compression valve and the second limiting member. By selecting different numbers, diameters, thicknesses, or stiffnesses of the second regulating valve plates 621 and combining them to abut against the outer flange 65 of the compression valve and the second limiting member, the opening pressure and flow characteristics of the second valve plate group 62 can be changed, thereby presetting the compression damping force and flexibly adjusting the opening pressure, flow characteristics, and damping curve of the compression valve assembly 6 to meet the vibration reduction requirements of different vehicle models and different working conditions.

[0048] Specifically, the compression valve body 61 is provided with a second connecting hole, the second limiting member is a second fastening nut 63, the compression valve assembly 6 also includes a second fastening bolt 64, the second fastening bolt 64 passes through the second connecting hole and the second valve plate assembly 62, and the second fastening nut 63 is screwed onto the second fastening bolt 64 so that the second valve plate assembly 62 is limited between the compression valve body 61 and the second fastening nut 63.

[0049] Furthermore, a second throttling groove is provided on the compression valve 6, which is connected to both the compression chamber 2 and the manifold 3. This arrangement creates a normally open throttling channel between the compression chamber 2 and the manifold 3. When encountering minor road bumps or slow braking, the shock absorber needs to compress at low speed. At this time, the oil flow rate is slow and the pressure is low, making it impossible to push open the second valve plate assembly 62. The oil flows from the compression chamber 2 to the manifold 3 through the second throttling groove, generating a small and linear damping force. This prevents the vehicle from experiencing harsh vibrations, which could impact the vehicle body and affect damping comfort.

[0050] In this embodiment, the second throttling groove is formed in one of the multiple second regulating valve plates 621, away from the manifold 3. In other embodiments, the second throttling groove may also be formed on the outer flange 65 of the compression valve.

[0051] Furthermore, the second valve assembly 62 includes a compression one-way valve 622, which can undergo elastic deformation to open or close the second throttling groove. Specifically, the compression valve body 61 has a compression one-way outer flange 66 and a compression one-way inner flange 67 concentrically arranged on the side near the compression valve outer flange 65. The compression valve through hole 611 is located between the compression one-way outer flange 66 and the compression one-way inner flange 67. The compression one-way valve 622 is in contact with the compression one-way outer flange 66 and the compression one-way inner flange 67, and the compression one-way valve 622 can undergo elastic deformation. When the shock absorber is in the recovery stroke, under the action of reverse oil pressure, the second regulating valve plate 621 tightly fits the outer flange 65 of the compression valve, and the compression one-way valve plate 622 tightly fits the outer flange 66 and the inner flange 67 of the compression one-way valve, so that the channel formed by the second throttling groove and the compression valve through hole 611 is reliably closed, preventing the oil from flowing in reverse and realizing the decoupling control of the recovery oil circuit and the compression oil circuit.

[0052] Understandably, in some embodiments, the recovery valve assembly 5 is provided with a first throttling groove 5211, and the first valve plate group 52 is provided with a recovery one-way valve plate 522; or, in some embodiments, the compression valve assembly 6 is provided with a second throttling groove, and the second valve plate group 62 is provided with a compression one-way valve plate 622; or, in some embodiments, the recovery valve assembly 5 is provided with a first throttling groove 5211, and the first valve plate group 52 is provided with a recovery one-way valve plate 522; simultaneously, the compression valve assembly 6 is provided with a second throttling groove, and the second valve plate group 62 is provided with a compression one-way valve plate 622. Those skilled in the art can adaptively adjust the arrangement of the throttling groove structure in the recovery valve assembly 5 and the compression valve assembly 6 as needed.

[0053] Alternatively, please refer to Figure 1 , Figure 2 , Figure 11 and Figure 12The diversion control valve also includes an overflow valve 7 and a support valve 12. The overflow valve 7 is located between the recovery valve assembly 5 and the compression valve assembly 6, and the support valve 12 is located between the compression valve assembly 6 and the control valve assembly 10. The manifold 3 includes a recovery overflow chamber 71, a compression valve outer cavity 69, and a support valve 12 that are connected in sequence. The recovery overflow chamber 71 is located on the overflow valve 7, and the compression valve outer cavity 69 is located on the compression valve assembly 6.

[0054] Specifically, one end of the flow valve 7 is sealed to the recovery valve assembly 5, and the other end of the flow valve 7 is sealed to the compression valve assembly 6. The flow valve 7 includes a recovery flow chamber 71 and a compression flow chamber 72. The recovery valve assembly 5 also includes a recovery valve outer cavity 59, and the compression valve assembly 6 also includes a compression valve outer cavity 69. The recovery flow chamber 71 communicates with the recovery valve inner cavity 58 and the compression valve outer cavity 69, and the compression flow chamber 72 communicates with the recovery valve outer cavity 59 and the compression valve through hole 611. The recovery flow chamber 71 can accommodate the first limiting member and at least a portion of the first regulating valve plate 521.

[0055] This configuration facilitates the arrangement of internal components of the diversion control valve. By setting an overflow valve 7 between the recovery valve assembly 5 and the compression valve assembly 6, and connecting the recovery overflow chamber 71 to the inner cavity 58 of the recovery valve and the outer cavity 69 of the compression valve respectively, and connecting the compression overflow chamber 72 to the outer cavity 59 of the recovery valve and the through hole 611 of the compression valve respectively, it is ensured that the recovery oil circuit and the compression oil circuit are independently decoupled and do not interfere with each other under normal operating conditions.

[0056] By installing a support valve 12 between the compression valve assembly 6 and the control valve assembly 10, and connecting the cavity of the support valve 12 with the inner cavity 58 of the recovery valve, the recovery flow chamber 71, and the outer cavity 69 of the compression valve to form a manifold 3, the unified flow of the recovery oil circuit and the compression oil circuit is achieved. This allows the oil in the recovery stroke and the compression stroke to be centrally integrated and directed before entering the control valve assembly 10, ensuring that the two oil circuits can share the same control valve assembly 10 for regulation while achieving damping decoupling. This effectively reduces the number of solenoid valves. This simplifies the structure of the diversion control valve, reducing costs and control complexity. On the other hand, the support valve 12, as an intermediate connecting component, provides stable structural support and sealing transition for the compression valve assembly 6 and the control valve assembly 10, improving the overall structural rigidity and connection reliability of the diversion control valve. Meanwhile, the manifold 3 is formed by connecting multiple cavities, resulting in a larger flow channel cross-sectional area and stronger flow capacity, which can meet the flow requirements of the shock absorber under high-speed and high-flow conditions, avoid excessive local pressure, and further optimize the smoothness and linearity of the damping characteristics.

[0057] Alternatively, please refer to Figure 1 , Figures 13 to 17The diversion control valve also includes a diversion valve assembly 8, which is used to be installed between the shock absorber and the recovery valve assembly 5. The compression chamber 2 includes a diversion valve outer chamber 83, a recovery valve outer chamber 59, and a compression flow chamber 72. The diversion valve outer chamber 83 is installed on the diversion valve assembly 8, the recovery valve outer chamber 59 is installed on the recovery valve assembly 5, and the compression flow chamber 72 is installed on the flow valve 7.

[0058] Specifically, the diversion control valve also includes a transfer valve 11, which is provided with a recovery flow hole 111 and a compression flow hole 112. One end of the diversion valve assembly 8 can be sealed and fitted with the shock absorber through the transfer valve 11, and the other end of the diversion valve assembly 8 is sealed and fitted with the recovery valve assembly 5. The diversion valve assembly 8 includes a diversion valve body 81. The side of the diversion valve body 81 near the recovery valve assembly 5 is provided with a diversion valve inner cavity 82 and a diversion valve outer cavity 83. The diversion valve body 81 is provided with a recovery inlet 84 communicating with the diversion valve inner cavity 82 and a compression inlet 85 communicating with the diversion valve outer cavity 83. The recovery inlet 84 communicates with the recovery flow hole 111 to form a recovery cavity 1. The compression inlet 85, the compression flow hole 112, the recovery valve outer cavity 59 and the compression flow cavity 72 communicate to form a compression cavity 2.

[0059] This configuration, through the connection valve 11 and the diversion valve assembly 8, allows one end of the diversion valve assembly 8 to be sealed to the shock absorber via the connection valve 11, and the other end to be sealed to the recovery valve assembly 5, achieving directional, zoned, and sealed diversion of the oil circuit between the shock absorber and the flow control valve. The diversion valve body 81 is respectively provided with a recovery inlet 84 communicating with the inner cavity 82 of the diversion valve and a compression inlet 85 communicating with the outer cavity 83 of the diversion valve. The recovery inlet 84 is connected to the recovery flow hole 111 to form a recovery cavity 1. The compression inlet 85, the compression flow hole 112, the outer cavity 59 of the recovery valve, and the compression flow cavity 72 are interconnected to form a compression cavity 2. This allows the recovery oil and compression oil of the shock absorber to be introduced independently and without interference into the corresponding valve system flow channels, achieving physical isolation and decoupling control between the recovery oil circuit and the compression oil circuit, avoiding cross-flow and interference between the two oil circuits, and ensuring damping adjustment accuracy. Meanwhile, the adapter valve 11 enables a sealed connection and modular connection between the flow control valve and the vibration damper, facilitating assembly, disassembly and maintenance, and improving the structural versatility and adaptability.

[0060] Furthermore, the drainage valve assembly 8 includes a drainage valve body 81, a recovery compensation valve plate 86, and an elastic element 87. The drainage valve assembly 8 also includes a drainage valve inner cavity 82, which is connected to the recovery cavity 1 and the recovery valve inner cavity 58 respectively. The drainage valve body 81 is also provided with a recovery compensation through hole 811, which is used to connect with the low-pressure cavity 150 of the shock absorber and the drainage valve inner cavity 82. The recovery compensation valve plate 86 and the elastic element 87 are both provided in the drainage valve inner cavity 82. One end of the elastic element 87 abuts against the recovery compensation valve plate 86, and the other end of the elastic element 87 abuts against the recovery valve assembly 5. The elastic element 87 can extend or compress so that the recovery compensation valve plate 86 closes or opens the recovery compensation through hole 811.

[0061] Specifically, the drain valve body 81 is located on one side of the inner cavity 58 of the recovery valve and is concentrically provided with a recovery compensation inner flange 88 and a recovery compensation outer flange 89. The drain valve body 81 is provided with a recovery compensation through hole 811, which is located between the recovery compensation inner flange 88 and the recovery compensation outer flange 89. The recovery compensation through hole 811 is used to communicate with the low pressure chamber 150 of the shock absorber. The recovery compensation valve plate 86 is in contact with the recovery compensation inner flange 88 and the recovery compensation outer flange 89. One end of the elastic member 87 abuts against the recovery compensation valve plate 86, and the other end of the elastic member 87 abuts against the recovery valve assembly 5.

[0062] Because the recovery valve assembly 5 is equipped with a recovery check valve 522, when the shock absorber is in the compression stroke, the oil cannot easily enter the upper chamber 110 through the lower chamber 120 for oil compensation. By setting the recovery compensation through hole 811 and the recovery compensation valve 86, when the shock absorber is in the compression stroke (such as...), Figure 21 As shown, the oil in the low-pressure chamber 150 can push open the recovery compensation valve plate 86, enter the inner cavity 82 of the diversion valve through the recovery compensation through hole 811, then enter the upper intermediate cavity 130 through the recovery chamber 1, and finally flow into the upper cavity 110 to achieve oil compensation and avoid cavitation, empty stroke or suction phenomenon inside the shock absorber. When the shock absorber is in the recovery stroke or internal pressure balance, the recovery compensation valve plate 86 is tightly attached to the inner flange 88 and the outer flange 89 of the recovery compensation under the action of the preload of the elastic element 87 and the oil pressure, sealing the recovery compensation through hole 811 to prevent oil leakage from the compensation channel and ensure the normal establishment and decoupling control of compression damping and recovery damping.

[0063] Preferably, the elastic element 87 is a wave spring.

[0064] Alternatively, please refer to Figure 1 , Figure 2 and Figure 18 The diversion control valve also includes a valve sleeve 9, which is used to be fixedly connected to the outer cylinder 190 of the shock absorber. The valve sleeve 9 is provided with an overflow chamber 4, which can be connected to the low-pressure chamber 150 of the shock absorber and the cavity of the control valve assembly 10 respectively.

[0065] Specifically, the diversion valve assembly 8, the recovery valve assembly 5, the overflow valve 7, the compression valve assembly 6, the support valve 12, and the control valve assembly 10 are all disposed in the valve sleeve 9, and together with the inner wall of the valve sleeve 9, they form an overflow cavity 4. The overflow cavity 4 can communicate with the low-pressure cavity 150 of the shock absorber and the cavity of the control valve assembly 10, respectively.

[0066] Furthermore, a flange structure 91 is provided at one end of the valve sleeve 9 near the shock absorber, and the diversion valve assembly 8 is supported on the flange structure 91. An axial through hole 92 is provided on the flange structure 91, and the overflow chamber 4 is connected to the low-pressure chamber 150 of the shock absorber through the axial through hole 92.

[0067] This configuration integrates the diversion valve assembly 8, the recovery valve assembly 5, the overflow valve 7, the compression valve assembly 6, the support valve 12, and the control valve assembly 10 within the valve sleeve 9. This arrangement allows each valve system to enclose the overflow chamber 4 within the inner wall of the valve sleeve 9, achieving a highly integrated and modular design for the flow control valve. This facilitates fixed assembly with the outer cylinder 190 of the shock absorber, improving structural integrity and installation convenience. The overflow chamber 4 and the axial through-hole 92 on the flanged structure 91 of the valve sleeve 9 connect the low-pressure chamber 150 of the shock absorber and the cavity of the control valve assembly 10, forming a stable low-pressure oil return and compensation channel, ensuring smooth oil circulation and stable damping characteristics.

[0068] On the other hand, please refer to Figure 1 , Figures 19 to 21 This embodiment provides a vibration damper, including an inner cylinder 160, an intermediate cylinder, and an outer cylinder 190 arranged coaxially from the inside to the outside, a piston assembly 200 slidably disposed in the cavity of the inner cylinder 160, and the aforementioned flow control valve. The piston body of the piston assembly 200 divides the cavity of the inner cylinder 160 into an upper cavity 110 and a lower cavity 120. The cylinder wall of the intermediate cylinder and the cylinder wall of the outer cylinder 190 enclose a low-pressure cavity 150. The intermediate cylinder includes an upper intermediate cylinder 170 and a lower intermediate cylinder 180. The upper intermediate cylinder 170 and the lower intermediate cylinder 180 enclose an upper intermediate cavity 130 and a lower intermediate cavity 140 with the cylinder wall of the inner cylinder 160, respectively. The upper intermediate cavity 130 is connected to the upper cavity 110 and the recovery cavity 1, respectively, and the lower intermediate cavity 140 is connected to the lower cavity 120 and the compression cavity 2, respectively.

[0069] Furthermore, the transfer valve 11 is coaxially sleeved outside the inner cylinder 160, and the upper intermediate cylinder 170 and the lower intermediate cylinder 180 are respectively interference-fitted with the two ends of the transfer valve 11. The transfer valve 11 is provided with a restoration flow hole 111 and a compression flow hole 112. The restoration flow hole 111 is connected to the upper intermediate cavity 130, and the compression flow hole 112 is connected to the lower intermediate cavity 140.

[0070] Specifically, the inner cylinder 160 has an upper through hole 161 and a lower through hole 162 respectively on its cylinder wall. The upper through hole 161 connects the upper cavity 110 and the upper intermediate cavity 130, and the lower through hole 162 connects the lower cavity 120 and the lower intermediate cavity 140.

[0071] Specifically, the inner wall of the transfer valve 11 is provided with a first receiving groove 113, a second receiving groove 114 and a sealing groove 115. The upper intermediate cylinder 170 is snapped into the first receiving groove 113, and the lower intermediate cylinder 180 is snapped into the second receiving groove 114. The transfer valve 11 is sealed and fitted to the outer wall of the inner cylinder 160 through a sealing ring provided in the sealing groove 115.

[0072] The diversion valve 11 of the shock absorber is coaxially sleeved outside the inner cylinder 160. The intermediate cylinder is divided into an upper intermediate cylinder 170 and a lower intermediate cylinder 180, which are respectively interference-fitted with the two ends of the diversion valve 11. The inner wall of the diversion valve 11 is provided with a first receiving groove 113, a second receiving groove 114 and a sealing groove 115. The upper intermediate cylinder 170 is snapped into the first receiving groove 113 and the lower intermediate cylinder 180 is snapped into the second receiving groove 114. The diversion valve 11 is sealed and fitted to the outer wall of the inner cylinder 160 through the sealing ring in the sealing groove 115. At the same time, the diversion valve 11 is provided with a recovery flow hole 111 and a compression flow hole 112. The recovery flow hole 111 is connected to the upper intermediate cavity 130 and the compression flow hole 112 is connected to the lower intermediate cavity 140, so as to realize the precise connection of the oil circuit between the shock absorber and the diversion valve. The diversion control valve is assembled onto the shock absorber via the transfer valve 11, making the shock absorber compact and highly integrated. The inner cylinder 160 and the intermediate cylinder form independent upper intermediate chambers 130 and lower intermediate chambers 140, which correspond to the recovery oil circuit and the compression oil circuit, respectively. Directional flow is achieved through the recovery flow hole 111 and the compression flow hole 112 of the transfer valve 11. During the compression stroke, the valve plate of the recovery valve assembly 5 is tightly sealed, and during the recovery stroke, the valve plate of the compression valve assembly 6 is tightly sealed to prevent crossflow of the two oil circuits and ensure the reliability of damping decoupling. The overflow chamber 4 is connected to the low-pressure chamber 150 and the control valve assembly 10 to form a stable oil return and compensation circuit, ensuring the long-term stable operation of the shock absorber.

[0073] The working principle of the flow control valve and vibration damper provided in this embodiment is as follows: During the recovery process, please refer to Figure 19The piston assembly 200 moves upward, driving the oil from the upper cavity 110 of the inner cylinder 160 through the upper through hole 161 of the inner cylinder 160 wall into the upper intermediate cavity 130, and then through the transition valve 11 to the return passage hole 111 into the return cavity 1 of the flow control valve. After passing through the return valve assembly 5, it enters the return valve inner cavity 58 (at low speed, the oil is throttled through the first throttling groove 5211, the return one-way valve plate 522 and the sealing gap of the double flange; at high speed, the oil pushes open the first regulating valve plate 521) and flows into the manifold 3. After being regulated by the control valve assembly 10, it flows into the overflow cavity 4, and finally flows into the low pressure cavity 150 of the shock absorber through the axial through hole 92 of the flange structure 91 of the transition valve 11, completing the oil circulation.

[0074] During the compression stroke, the piston assembly 200 moves downward, driving the oil from the lower chamber 120 of the inner cylinder 160 through the lower through hole 162 in the inner cylinder 160 wall into the lower intermediate chamber 140, and then through the compression through hole 112 of the transfer valve 11 into the compression chamber 2 of the flow control valve. After passing through the compression valve assembly 6, it enters the manifold 3, and after being regulated by the control valve assembly 10, it flows into the overflow chamber 4. Finally, it flows into the low-pressure chamber 150 of the shock absorber through the axial through hole 92 of the flange structure 91 of the transfer valve 11, completing the oil circulation.

[0075] Meanwhile, during the compression stroke, the recovery check valve plate 522 and the first regulating valve plate 521 are tightly fitted to the corresponding flange under the action of reverse oil pressure, and the first throttling groove 5211 and the recovery valve through hole 511 are closed to prevent oil crossflow (the same applies to the recovery stroke); if a large flow extreme condition occurs, the oil can achieve auxiliary flow through the recovery flow chamber 71 and the compression flow chamber 72 of the flow valve 7 to protect the valve system structure.

[0076] Further, please refer to Figure 21 When the shock absorber is in the compression stroke, the oil in the low-pressure chamber 150 can push open the recovery compensation valve plate 86, enter the inner cavity 82 of the diversion valve through the recovery compensation through hole 811, then enter the upper intermediate cavity 130 through the recovery cavity 1, and finally flow into the upper cavity 110 to achieve oil compensation and avoid cavitation, empty stroke or suction phenomenon inside the shock absorber. When the shock absorber is in the recovery stroke or when the internal pressure is balanced, the recovery compensation valve plate 86 is tightly attached to the inner flange 88 and the outer flange 89 of the recovery compensation under the action of the preload of the elastic element 87 and the oil pressure, sealing the recovery compensation through hole 811 to prevent oil leakage from the compensation channel and ensure the normal establishment and decoupling control of compression damping and recovery damping.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A flow control valve for connection to a vibration damper, the vibration damper having an upper chamber (110), a lower chamber (120), and a low-pressure chamber (150), characterized in that, The diversion control valve includes a recovery chamber (1), a compression chamber (2), a manifold chamber (3), a recovery valve assembly (5), a compression valve assembly (6), and a control valve assembly (10). The recovery chamber (1) is used to communicate with the upper chamber (110) of the shock absorber. The compression chamber (2) is used to communicate with the lower chamber (120) of the shock absorber. The recovery chamber (1) and the manifold chamber (3) are connected or disconnected through the recovery valve assembly (5). The compression chamber (2) and the manifold chamber (3) are connected or disconnected through the compression valve assembly (6). The control valve assembly (10) is used to adjust the flow area between the manifold chamber (3) and the low-pressure chamber (150) of the shock absorber.

2. The flow control valve according to claim 1, characterized in that, The recovery valve assembly (5) includes a recovery valve cavity (58), which is connected to the recovery cavity (1) and the manifold (3) respectively. The recovery valve cavity (58) has a first opening on the side near the manifold (3). A first valve plate group (52) is provided at the first opening. The first valve plate group (52) is configured to be elastic. When the difference between the hydraulic pressure on the side of the recovery valve cavity (58) and the hydraulic pressure on the side of the manifold (3) is greater than the preset recovery damping force, the first valve plate group (52) can undergo elastic deformation to open the first opening. When the difference between the hydraulic pressure on the side of the recovery valve cavity (58) and the hydraulic pressure on the side of the manifold (3) is less than or equal to the preset recovery damping force, the first valve plate group (52) can close the first opening. And / or, the compression valve assembly (6) includes a compression valve cavity (68), which is connected to the compression chamber (2) and the manifold (3) respectively. The compression valve cavity (68) has a second opening on the side near the manifold (3). A second valve plate group (62) is provided at the second opening. The second valve plate group (62) is configured to be elastic. When the difference between the hydraulic pressure on the side of the compression valve cavity (68) and the hydraulic pressure on the side of the manifold (3) is greater than a preset compression damping force, the second valve plate group (62) can undergo elastic deformation to open the second opening. When the difference between the hydraulic pressure on the side of the compression valve cavity (68) and the hydraulic pressure on the side of the manifold (3) is less than or equal to the preset compression damping force, the second valve plate group (62) can close the second opening.

3. The flow control valve according to claim 2, characterized in that, The first valve plate group (52) includes a plurality of first regulating valve plates (521) that are sequentially attached to each other, and at least two of the plurality of first regulating valve plates (521) have different diameters and / or thicknesses; The second valve plate group (62) includes a plurality of second regulating valve plates (621) that are sequentially attached to each other, and at least two of the plurality of second regulating valve plates (621) have different diameters and / or thicknesses.

4. The flow control valve according to claim 3, characterized in that, The recovery valve assembly (5) is provided with a first throttling groove (5211), which is connected to the recovery chamber (1) and the manifold (3) respectively. The compression valve assembly (6) is provided with a second throttling groove, which is connected to the compression chamber (2) and the manifold (3) respectively.

5. The flow control valve according to claim 4, characterized in that, The first valve plate group (52) further includes a restoring one-way valve plate (522), which is capable of elastic deformation to open or close the first throttling groove (5211); The second valve plate group (62) includes a compression one-way valve plate (622), which is capable of elastic deformation to open or close the second throttling groove (6211).

6. The flow control valve according to claim 2, characterized in that, The diversion control valve also includes an overflow valve (7) and a support valve (12). The overflow valve (7) is disposed between the recovery valve assembly (5) and the compression valve assembly (6). The support valve (12) is disposed between the compression valve assembly (6) and the control valve assembly (10). The manifold (3) includes a recovery overflow chamber (71), a compression valve outer cavity (69), and the cavity of the support valve (12) connected in sequence. The recovery overflow chamber (71) is disposed on the overflow valve (7), and the compression valve outer cavity (69) is disposed on the compression valve assembly (6).

7. The flow control valve according to claim 6, characterized in that, The diversion control valve also includes a diversion valve assembly (8), which is used to be disposed between the shock absorber and the recovery valve assembly (5). The compression chamber (2) includes a diversion valve outer chamber (85), a recovery valve outer chamber (59), and a compression flow chamber (72). The diversion valve outer chamber (85) is disposed on the diversion valve assembly (8), the recovery valve outer chamber (59) is disposed on the recovery valve assembly (5), and the compression flow chamber (72) is disposed on the flow valve (7).

8. The flow control valve according to claim 7, characterized in that, The diversion valve assembly (8) includes a diversion valve body (81), a recovery compensation valve plate (86), and an elastic element (87). The diversion valve assembly (8) also includes a diversion valve inner cavity (82), which communicates with the recovery cavity (1) and the recovery valve inner cavity (58) respectively. The diversion valve body (81) is also provided with a recovery compensation through hole (811), which is used to connect with the low-pressure cavity (150) of the shock absorber and the... The inner cavity (82) of the drainage valve is connected, and the recovery compensation valve plate (86) and the elastic element (87) are both disposed in the inner cavity (82) of the drainage valve. One end of the elastic element (87) abuts against the recovery compensation valve plate (86), and the other end of the elastic element (87) abuts against the recovery valve assembly (5). The elastic element (84) can extend or compress so that the recovery compensation valve plate (86) closes or opens the recovery compensation through hole (811).

9. The flow control valve according to claim 1, characterized in that, The diversion control valve also includes a valve sleeve (9), which is used to be fixedly connected to the outer cylinder (190) of the shock absorber. The valve sleeve (9) is provided with an overflow chamber (4), which can be connected to the low-pressure chamber (150) of the shock absorber and the cavity of the control valve assembly (10) respectively.

10. A vibration damper, characterized in that, The system comprises an inner cylinder (160), an intermediate cylinder, and an outer cylinder (190) arranged coaxially and sequentially from the inside to the outside; a piston assembly (200) slidably disposed in the cavity of the inner cylinder (160); and a flow control valve as described in any one of claims 1-9. The piston body of the piston assembly (200) divides the cavity of the inner cylinder (160) into an upper cavity (110) and a lower cavity (120). The cylinder wall of the intermediate cylinder and the cylinder wall of the outer cylinder (190) enclose the low-pressure... The cavity (150) includes an upper intermediate cylinder (170) and a lower intermediate cylinder (180). The upper intermediate cylinder (170) and the lower intermediate cylinder (180) are respectively enclosed by the cylinder wall of the inner cylinder (160) to form an upper intermediate cavity (130) and a lower intermediate cavity (140). The upper intermediate cavity (130) is connected to the upper cavity (110) and the recovery cavity (1) respectively. The lower intermediate cavity (140) is connected to the lower cavity (120) and the compression cavity (2) respectively.

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