Overflow valve, valve assembly and rebuilt valve of shock absorber, shock absorber and vehicle

Abstract

The overflow valve of the shock absorber comprises an overflow valve seat, a collecting cavity and an overflow cavity are formed in the overflow valve seat, the collecting cavity is opened towards the recovery valve, the overflow cavity is communicated with the side, away from the recovery valve, of the collecting cavity, a valve body is arranged in the overflow cavity, and the overflow cavity is communicated with the collecting cavity. At least part of the inner peripheral wall of the collecting cavity is constructed into an arc-shaped wall face, and the inner diameter of the arc-shaped wall face is gradually reduced in the direction from the position close to the rebuilt valve to the position away from the rebuilt valve. According to the overflow valve of the shock absorber, the stability of oil flowing can be improved, the influence caused when pressure changes drastically is reduced, and noise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to an overflow valve, valve assembly, recovery valve, shock absorber, and vehicle. Background Technology

[0002] The reset valve and overflow valve seat are indispensable components of the damper valve system, playing a role in generating additional damping force when no power is applied in the entire damper structure.

[0003] However, the existing overflow valve seat has a poorly structured collection chamber wall, resulting in poor flow smoothness and dead zones when oil flows within the collection chamber. When the pressure inside the chamber changes drastically, air bubbles are easily generated, leading to noise. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an overflow valve for a shock absorber, wherein the overflow valve of the shock absorber forms a collection chamber on the side facing the recovery valve, and the inner wall of the collection chamber is at least partially constructed as an arc-shaped wall surface, which can improve the stability of oil flow, reduce the impact of drastic pressure changes, and reduce noise.

[0005] According to an embodiment of the present invention, the shock absorber includes a recovery valve and the overflow valve. The overflow valve is adapted to be connected to one side of the recovery valve, and the overflow valve includes an overflow valve seat. The overflow valve seat forms a collection chamber and an overflow chamber. The collection chamber is open toward the recovery valve, and the overflow chamber is connected to the side of the collection chamber away from the recovery valve. A valve body is provided in the overflow chamber. At least a portion of the inner peripheral wall of the collection chamber is constructed as an arc-shaped wall surface, and the arc-shaped wall surface is constructed such that the inner diameter gradually decreases from near the recovery valve to away from the recovery valve.

[0006] According to the embodiment of the present invention, the overflow valve and the recovery valve of the shock absorber are disposed inside the shock absorber, and the side of the overflow valve facing the recovery valve is provided with a collection chamber. The oil in the shock absorber can enter the collection chamber in the overflow valve. The inner wall of the collection chamber is at least partially constructed as an arc-shaped wall surface. The valve body located in the overflow chamber can guide the flow of hydraulic oil and ensure the normal operation of the hydraulic system. That is, the inner wall of the collection chamber is at least partially constructed as an arc-shaped wall surface. When the oil flows into the collection chamber, the stability of the oil flow can be improved, the impact of drastic pressure changes can be reduced, and noise can be reduced.

[0007] This utility model embodiment also proposes a valve assembly for a shock absorber, including a recovery valve and the aforementioned overflow valve of the shock absorber. The valve assembly divides the cavity of the shock absorber into a first cavity and a second cavity. The recovery valve is provided with a first valve port and a second valve port. The side wall of the overflow valve seat is provided with an oil port. The overflow cavity is selectively connected to the oil port. During the compression stroke of the shock absorber, oil flows from the first cavity through the first valve port, the collection cavity, the overflow cavity, and the oil port into the second cavity. During the recovery stroke of the shock absorber, oil flows from the second cavity through the oil port, the overflow cavity, the collection cavity, and the second valve port into the first cavity.

[0008] According to the valve assembly of the shock absorber in this embodiment of the present invention, during the compression stroke or the recovery stroke of the shock absorber, the oil can flow in the space between the first chamber, the second chamber, the recovery valve, and the overflow valve of the shock absorber, thereby compressing or restoring the shock absorber. The flow friction between the oil and the recovery valve and the overflow valve, as well as the friction within the oil molecules, forms a damping force on the vibration, converting the vibration energy into heat energy and dissipating it into the atmosphere, thereby attenuating the vibration. During the flow process, since the inner peripheral wall of the collecting chamber is at least partially constructed as an arc-shaped wall, the smoothness of the oil flow throughout the process can be improved, the impact of drastic pressure changes can be reduced, and noise can be reduced.

[0009] According to the valve assembly of the shock absorber in this embodiment of the present invention, the valve body is movable relative to the overflow valve seat. During the compression stroke of the shock absorber, oil enters the collection chamber from the first valve hole and flows into the overflow chamber, pushing the valve body open so that the valve body and the overflow valve seat form a flow channel. The oil flows through the flow channel along the oil port to the second chamber. During the recovery stroke of the shock absorber, the oil passes through the oil port, the flow channel, the collection chamber in sequence and flows through the second valve hole to the first chamber.

[0010] According to the valve assembly of the shock absorber in the present invention, the valve body and the overflow valve seat are movably connected by an elastic component.

[0011] According to an embodiment of the present invention, the valve assembly of the shock absorber includes a first connector, an overflow valve plate, and an elastic element; the first connector is connected to a limiting portion, the limiting portion extends radially along the first connector, the overflow valve plate is located between the limiting portion and the overflow valve seat, the elastic element is sleeved on the first connector and located between the valve body and the limiting portion, and the flow channel is formed when the valve body and the overflow valve plate are separated.

[0012] According to the valve assembly of the shock absorber in this embodiment of the present invention, the first connecting member is constructed as a bolt, the limiting part is constructed as a nut, and the nut presses the overflow valve plate against the overflow valve seat.

[0013] According to the valve assembly of the shock absorber in this embodiment of the present invention, the overflow valve seat further includes a throttling orifice, the throttling orifice connecting the collecting chamber and the second chamber. During the compression stroke of the shock absorber, the oil flows from the collecting chamber through the throttling orifice into the second chamber. During the recovery stroke of the shock absorber, the oil flows from the second chamber through the throttling orifice into the collecting chamber.

[0014] This utility model embodiment also discloses a recovery valve, applicable to the valve assembly of the above-mentioned shock absorber, including a piston, a first damping assembly, and a second damping assembly. The first valve port and the second valve port are disposed on the piston. The piston has a mounting cavity. The first damping assembly is installed in the mounting cavity, and the second damping assembly is installed on the side of the piston away from the mounting cavity. During the compression stroke of the shock absorber, the oil is adapted to flow from the first cavity to the first valve port, and at least a portion of the first damping assembly is deformed to flow into the collection cavity. During the reset stroke of the shock absorber, the oil is adapted to flow through the second cavity to the collection cavity, and at least a portion of the second damping assembly is deformed to flow out of the collection cavity.

[0015] According to the recovery valve of this utility model embodiment, the first damping component includes a compensating valve plate and a spring plate assembly. Both the compensating valve plate and the spring plate assembly are provided with a through hole. After the compensating valve plate is deformed, the oil flows from the first valve hole to the through hole and then to the collection chamber.

[0016] The recovery valve according to an embodiment of the present utility model further includes a diameter adjusting member. The compensating valve plate and the spring plate assembly are sequentially disposed on the inner peripheral wall of the diameter adjusting member, and the diameter adjusting member is installed in the mounting cavity such that the compensating valve plate is opposite to the first valve hole.

[0017] According to the recovery valve of this utility model embodiment, the spring assembly includes an elastic sheet and an elastic support member, the elastic sheet is located between the compensation valve sheet and the elastic support member, and a portion of the overflow valve abuts against the elastic support member.

[0018] According to an embodiment of the present invention, the second damping component of the recovery valve includes a recovery valve plate, a limiting plate, and a second connecting member. The limiting plate and the recovery valve plate are axially distributed and connected to the piston through the second connecting member. The limiting plate presses and limits the middle part of the recovery valve plate, and the edge part of the recovery valve plate blocks the second valve hole and opens the second valve hole when deformed.

[0019] The vibration damper of this utility model embodiment includes the overflow valve of the vibration damper, or the valve assembly of the vibration damper, or the recovery valve.

[0020] The shock absorber employs the aforementioned overflow valve and recovery valve, which can improve the smoothness of oil flow and reduce noise.

[0021] This utility model embodiment also proposes a vehicle including the above-described shock absorber.

[0022] The advantages of the vehicle compared to existing technologies and the shock absorber compared to existing technologies are the same, and will not be elaborated here.

[0023] Additional aspects and advantages of this 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

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is an exploded schematic diagram of the recovery valve according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the piston and diameter adjusting component of the recovery valve according to an embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional schematic diagram of the second valve hole and the first valve hole of the restoration valve in an embodiment of the present utility model.

[0028] Figure 4 This is a partial cross-sectional view of the overflow valve according to an embodiment of the present invention. Figure 1 ;

[0029] Figure 5 This is a partial cross-sectional view of the overflow valve according to an embodiment of the present invention. Figure 2 ;

[0030] Figure 6 This is a schematic diagram of the structure of the recovery valve and the overflow valve in the cavity of the shock absorber according to an embodiment of the present invention;

[0031] Figure 7 This is a three-dimensional cross-sectional schematic diagram of the recovery valve and the overflow valve according to an embodiment of the present utility model;

[0032] Figure 8 This is a schematic diagram of the oil flow in the recovery valve and the relief valve during the compression stroke of the shock absorber according to an embodiment of the present invention;

[0033] Figure 9This is a schematic diagram of the oil flowing in the recovery valve and the overflow valve during the recovery stroke of the shock absorber according to an embodiment of the present invention.

[0034] Figure label:

[0035] Overflow valve 1, overflow valve seat 11, cylinder part 111, end cap part 112, arc-shaped wall 113, collection chamber 114, throttling orifice 115, flow channel 116, overflow chamber 117, valve body 12, overflow valve hole 13, overflow valve plate 14, first connecting member 15, limiting part 16, elastic member 17, oil port 18, recovery valve 2, piston 21, second valve hole 211, first valve hole 212, piston ring 213, mounting chamber 214, diameter adjusting member 22, first damping assembly 23, compensation valve plate 231, elastic plate 232, elastic support member 233, through hole 234, recovery valve plate 24, first recovery valve plate 241, second recovery valve plate 242, limiting plate 25, second connecting member 26, second damping assembly 27, shock absorber 3, first chamber 31, second chamber 32. Detailed Implementation

[0036] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The following is for reference. Figures 1-9 The description of the overflow valve 1 of the shock absorber 3 according to an embodiment of the present invention describes that the overflow valve 1 of the shock absorber 3 forms a collection chamber 114 on the side facing the recovery valve 2, and the inner wall of the collection chamber 114 is at least partially constructed as an arc-shaped wall surface 113, which can improve the stability of oil flow, reduce the impact of drastic pressure changes, and reduce noise; moreover, by providing a throttling orifice 115 in the overflow valve seat 11, when the oil pressure in the collection chamber 114 changes drastically, the oil can be replenished from the throttling orifice 115, reducing the possibility of eddies and bubbles appearing in the collection chamber 114 of the overflow valve seat 11.

[0040] Furthermore, in this embodiment of the invention, the elastic element 17 and the overflow valve plate 14 of the overflow valve 1 are separated by bolts, which can reduce the resonance problem between the elastic element 17 and the overflow valve plate 14 and reduce noise. Moreover, it can prevent the elastic element 17 from scratching the overflow valve plate 14 and increase the support area of ​​the overflow valve plate 14, thereby improving the fatigue performance of the overflow valve plate 14. In addition, the first damping component 23 of the recovery valve 2 is installed in the diameter adjustment component 22, and the diameter adjustment component 22 is further installed in the mounting cavity 214 of the piston 21, which is convenient for installation and reduces the problem of poor coaxiality of the elastic plate 232, the compensation valve plate 231 and the elastic support component 233 in the first damping component 23, thereby improving the stability of the first damping component 23 and thus improving the stability of the vibration damper 3.

[0041] like Figure 1-9 As shown, according to an embodiment of the present invention, the shock absorber 3 includes a relief valve 1, the shock absorber 3 includes a recovery valve 2 and a relief valve 1, and the relief valve 1 is adapted to be connected to one side of the recovery valve 2.

[0042] The overflow valve 1 includes an overflow valve seat 11, which has a collection chamber 114 and an overflow chamber 117. The collection chamber 114 is open to the recovery valve 2, and the overflow chamber 117 is connected to the side of the collection chamber 114 away from the recovery valve 2. A valve body 12 is provided in the overflow chamber 117. At least part of the inner peripheral wall of the collection chamber 114 is constructed as an arc-shaped wall surface 113, and the arc-shaped wall surface 113 is constructed such that the inner diameter gradually decreases from the direction close to the recovery valve 2 to the direction away from the recovery valve 2.

[0043] In practice, the main function of the return valve 2 in the shock absorber 3 is to control the flow of oil, ensuring that the shock absorber 3 can effectively dissipate vibration energy during compression and extension. When the car travels on uneven roads, the spring of the shock absorber 3 will be compressed or extended. At this time, the return valve 2 will open or close accordingly, controlling the flow of oil, thereby generating damping force, dissipating vibration energy, and achieving the effect of vibration reduction. The relief valve 1 has good adjustment performance, can adjust the working pressure and flow rate according to needs, and has a fast response speed, able to quickly respond to changes in system pressure. That is, when the vehicle is subjected to vibration, components such as the return valve 2 and the relief valve 1 provide the necessary damping force by controlling the flow of oil, thereby reducing vibration and impact.

[0044] Specifically, the overflow valve 1 and the recovery valve 2 are connected in series in the shock absorber 3, and are located within the cavity of the shock absorber 3 and can move within the cavity of the shock absorber 3. The overflow valve 1 has a collection chamber 114, which faces the recovery valve 2. When the shock absorber 3 is in certain working states, oil can flow from inside the shock absorber 3 to the collection chamber 114 of the overflow valve 1. The collection chamber 114, the inside of the shock absorber 3, and the overflow chamber 117 are interconnected. The oil in the collection chamber 114 can flow into the shock absorber 3, and the oil in the shock absorber 3 can also flow into the collection chamber 114. The inner wall of the collection chamber 114 can be at least partially constructed as an arc-shaped wall 113, depending on the direction of movement of the specific shock absorber 3. When the oil flows into the collection chamber 114, it will not be too abrupt during the flow, reducing dead angles and improving the smoothness of the oil flow, which means improving the stability of the oil flow, reducing the impact of drastic pressure changes, and reducing noise. In addition, the overflow chamber 117 of the overflow valve seat 11 is provided with a valve body 12. The valve body 12 and the overflow valve seat 11 can guide the flow of oil in the overflow chamber 117 to ensure the normal operation of the hydraulic system.

[0045] This utility model embodiment also discloses a valve assembly for a shock absorber 3, including a recovery valve 2 and the aforementioned overflow valve 1 of the shock absorber 3. The valve assembly divides the cavity of the shock absorber 3 into a first cavity 31 and a second cavity 32. The recovery valve 2 is provided with a first valve hole 212 and a second valve hole 211. The side wall of the overflow valve seat 11 is provided with an oil port 18. The overflow cavity 117 is selectively connected to the oil port 18. During the compression stroke of the shock absorber 3, the oil flows from the first cavity 31 through the first valve hole 212, the collection cavity 114, the overflow cavity 117, and the oil port 18 into the second cavity 32. During the recovery stroke of the shock absorber 3, the oil flows from the second cavity 32 through the oil port 18, the overflow cavity 117, the collection cavity 114, and the second valve hole 211 into the first cavity 31.

[0046] Specifically, in combination Figure 1 , Figure 6-9 As shown, Figure 6The first chamber 31 can be understood as the lower chamber of the shock absorber 3, and the second chamber 32 is the upper chamber of the shock absorber 3. The recovery valve 2 has a first valve port 212 and a second valve port 211. The side wall of the overflow valve seat 11 has an oil port 18. During the compression stroke of the shock absorber 3, that is... Figure 8 In this state, the oil flows from the first valve hole 212 to the collection chamber 114. The collection chamber 114 and the overflow chamber 117 are connected through the overflow valve hole 13. The oil flows from the collection chamber 114 to the overflow chamber 117 and flows out from the overflow chamber 117 along the oil port 18. The oil port 18 can be set to multiple, and the multiple oil ports 18 are evenly distributed around the overflow valve seat 11 to improve the flow efficiency and make the oil flow more uniform.

[0047] At this time, the volume of the second chamber 32 increases, while the volume of the first chamber 31 decreases. Oil flows from the first chamber 31 to the second chamber 32, which corresponds to the process of the shock absorber 3 flowing from the lower chamber to the upper chamber, representing the compression process of the shock absorber 3. Therefore, when the first valve port 212 of the return valve 2 opens, the oil in the first chamber 31 enters the second chamber 32 through the return valve 2 and the overflow valve 1. The throttling effect of the two valves on the oil causes the shock absorber 3 to generate a damping effect during compression, thereby reducing the rebound force of the spring in the shock absorber 3 and quickly stabilizing the vehicle body.

[0048] When the shock absorber 3 returns to its original state, that is... Figure 9 In this state, the oil flows from the second chamber 32 to the collection chamber 114 of the overflow valve 1, and then flows through the collection chamber 114 along the second valve hole 211 to the first chamber 31 of the shock absorber 3. This is the process of repairing or replacing the vehicle shock absorber 3 to restore it to its normal working state.

[0049] Therefore, throughout the entire oil flow process, the inner wall of the collection chamber 114 of the overflow valve 1 is at least partially set as an arc-shaped wall surface 113, such as... Figure 7 In the middle, the inner wall of the end of the overflow valve 1 facing the reset valve 2 is an arc-shaped wall 113. During the compression stroke of the shock absorber 3, the oil enters the collection chamber 114 of the overflow valve 1 from the reset valve 2, diffuses to both sides, and then flows back to the central area through the arc-shaped wall 113, improving the smoothness of the oil flow, thereby improving the stability of the shock absorber 3's contraction or reset and reducing noise.

[0050] In some embodiments, the valve body 12 can move relative to the overflow valve seat 11. During the compression stroke of the damper 3, the oil enters the collection chamber 114 from the first valve hole 212 and flows into the overflow chamber 117, pushing the valve body 12 open so that the valve body 12 and the overflow valve seat 11 form a flow channel 116. The oil flows through the flow channel 116 along the oil port 18 to the second chamber 32. During the recovery stroke of the damper 3, the oil passes through the oil port 18, the flow channel 116, the collection chamber 114 in sequence and flows through the second valve hole 211 to the first chamber 31.

[0051] Combination Figure 6 and Figure 8 As shown, the oil enters the space between the recovery valve 2 and the overflow valve 1 from the first chamber 31 (lower chamber) of the shock absorber 3, and after entering the collection chamber 114, it further enters the overflow chamber 117. Since the valve body 12 can move relative to the overflow valve seat 11, the oil can push the valve body 12 open at this time, and a flow channel 116 is created between the valve body 12 and the overflow valve seat 11. The oil flows from the overflow chamber 117 through the flow channel 116 to the oil port 18, and thus flows from the first chamber 31 of the shock absorber 3 to the second chamber 32.

[0052] When the oil flows from the second chamber 32 to the flow channel 116 of the overflow valve 1, and then through the flow channel 116 to the overflow chamber 117 of the overflow valve 1, it continues to flow through the overflow chamber 117 and through the overflow valve hole 13 to the collection chamber 114 of the overflow valve 1. When the oil pressure is high, it can push the valve body 12 toward the overflow valve seat 11, thereby realizing the reset of the valve body 12. And the process of the oil flowing from the second chamber 32 of the shock absorber 3 to the first chamber 31 is the process of the upper chamber flowing to the lower chamber. At this time, the shock absorber 3 is reset to the initial state.

[0053] In some embodiments, the valve body 12 and the overflow valve seat 11 are movably connected by an elastic component. That is, the valve body 12 can move relative to the overflow valve seat 11. When the valve body 12 is pushed open, due to the elastic force of the elastic component, the elastic force of the elastic component is directed towards the first chamber 31 of the damper 3. Then, when the oil flows from the second chamber 32 to the first chamber 31, it can provide a restoring elastic force to the elastic component. In this embodiment, the damper 3 is a solenoid valve damper. The electromagnetic force within the solenoid valve damper can also exert a force on the side of the valve body 12 facing the first chamber 31. The restoring elastic force of the elastic component, combined with the electromagnetic force of the solenoid valve damper, causes the valve body 12 to contact the overflow valve seat 11, thereby closing the flow channel 116 and achieving the restoring of the damper 3. In other words, when the valve body 12 is pushed open, the oil pressure is greater than the sum of the electromagnetic force and the elastic force of the elastic component.

[0054] In some embodiments, the elastic component includes a first connector 15, an overflow valve plate 14, and an elastic member 17; the first connector 15 is connected to a limiting portion 16, the limiting portion 16 extends radially along the first connector 15, the overflow valve plate 14 is located between the limiting portion 16 and the overflow valve seat 11, the elastic member 17 is sleeved on the first connector 15 and is located between the valve body 12 and the limiting portion 16, and a flow channel 116 is formed when the valve body 12 and the overflow valve plate 14 are separated.

[0055] In practice, the overflow valve seat 11 includes a connected cylindrical part 111 and an end cap part 112. The end cap part 112 forms a collection chamber 114 on the side facing the recovery valve 2. The overflow valve hole 13 is provided in the end cap part 112. The valve body 12 is provided inside the cylindrical part 111. The side wall of the cylindrical part 111 is provided with an oil port 18. When the valve body 12 moves away from the end cap part 112, a flow channel 116 is formed between the valve body 12 and the end cap part 112.

[0056] The first connector 15 connects the overflow valve plate 14 to the side of the end cap 112 away from the recovery valve 2, and the limiting part 16 of the first connector 15 squeezes the overflow valve plate 14. At the same time, the elastic element 17 is a spring, which is sleeved on the first connector 15 and on the side of the limiting part 16 away from the overflow valve plate 14. The spring and the valve body 12 are pressed against each other, thereby separating the spring from the overflow valve plate 14. At this time, the flow channel 116 is formed between the overflow valve plate 14 and the valve body 12. The position of the overflow valve plate 14 relative to the overflow valve seat 11 remains unchanged, and the overflow valve plate 14 and the elastic element 17 are directly separated by the limiting part 16, which reduces the problem of resonance between the elastic element 17 and the overflow valve plate 14 during the up and down movement of the valve body 12, thereby reducing the noise problem.

[0057] In some embodiments, the first connector 15 is configured as a bolt, and the limiting part 16 is configured as a nut, which presses the overflow valve plate 14 against the overflow valve seat 11.

[0058] The first connector 15 is threaded through the overflow valve plate 14 and connected to the end cap 112 of the overflow valve seat 11. It is then tightened with a nut, which presses the overflow valve plate 14 against the end cap 112. The other end of the nut presses against the elastic member 17. The bolts facilitate the connection of the overflow valve plate 14 and the connection of the nut and bolts. The nut can also separate the elastic member 17 and the overflow valve plate 14, avoiding resonance between them. The nut is also easy to install.

[0059] In some embodiments, the overflow valve seat 11 further includes a throttling orifice 115, which connects the collection chamber 114 and the second chamber 32. During the compression stroke of the damper 3, the oil flows from the collection chamber 114 through the throttling orifice 115 into the second chamber 32. During the recovery stroke of the damper 3, the oil flows from the second chamber 32 through the throttling orifice 115 into the collection chamber 114.

[0060] The throttling orifice 115 extends radially along the overflow valve seat 11 and connects the overflow chamber 117 and the collection chamber 114. When the damper 3 is in the compression stroke, the oil flows from the first chamber 31 of the damper 3 to the collection chamber 114, and at the same time, the oil in the collection chamber 114 can flow along the radially arranged throttling orifice 115 to the second chamber 32, that is... Figure 8The solid arrows in the diagram represent the flow path of the oil from the first chamber 31, the collection chamber 114, and to the second chamber 32 during the compression stroke. Figure 8 The dashed arrows indicate the path of the oil flowing from the collection chamber 114 along the throttling orifice 115 to the second chamber 32.

[0061] Therefore, by setting the throttle orifice 115, it is possible to avoid the oil suddenly pushing open the valve body 12 after entering the collection chamber 114, which would lead to unstable separation between the valve body 12 and the overflow valve seat 11 and easily generate eddies. The throttle orifice 115 has a buffering effect, allowing the oil to flow slowly into the collection chamber 114, improving the stability of the valve body 12's movement and preventing eddies. On the other hand, it provides a flow channel 116 for low-speed conditions, generating low-speed damping force and preventing the piston 21 from having idle strokes during reversing movement, that is, preventing the oil from not flowing during reversing, thus making the shock absorber 3 more stable when it moves.

[0062] Continue to refer to Figure 9 As shown, Figure 9 The solid arrows indicate the flow path of oil from the second chamber 32 to the collection chamber 114 and from the collection chamber 114 to the first chamber 31, while the dashed arrows indicate that oil can flow from the second chamber 32 through the throttling orifice 115 into the collection chamber 114. When oil flows from the second chamber 32 of the damper 3 to the flow channel 116, and then through the overflow valve orifice 13 into the collection chamber 114, as the speed increases and the valve body 12 opens, the oil in the second chamber 32 flows into the collection chamber 114 through the throttling orifice 115, flowing from both sides towards the central region, where it merges with the oil entering through the flow channel 116, generating a high-speed damping force. The oil flowing into the throttling orifice 115 can pre-fill the two side regions, preventing the oil entering the central region through the flow channel 116 from diffusing to the two side regions, thus improving flow stability. Moreover, it compensates for the cavity generated in the collection chamber 114 when the second valve orifice 211 of the recovery valve 2 is open under low-speed conditions, preventing backlash and improving the stability of the damper 3.

[0063] In other words, by opening the throttle orifice 115, when the oil pressure changes drastically, the oil can be replenished through the throttle orifice 115, which reduces the possibility of eddies and bubbles appearing in the collection chamber 114 of the overflow valve seat 11, thereby improving the stability of the vibration damper 3.

[0064] This utility model embodiment also discloses a recovery valve 2, applicable to the valve assembly of the above-mentioned shock absorber 3, including a piston 21, a first damping assembly 23 and a second damping assembly 27. A first valve hole 212 and a second valve hole 211 are provided in the piston 21. The piston 21 has a mounting cavity 214. The first damping assembly 23 is installed in the mounting cavity 214, and the second damping assembly 27 is installed on the side of the piston 21 away from the mounting cavity 214. During the compression stroke of the shock absorber 3, the oil is suitable to flow from the first cavity 31 to the first valve hole 212, and at least part of the first damping assembly 23 is deformed to flow into the collection cavity 114. During the reset stroke of the shock absorber 3, the oil is suitable to flow through the second cavity 32 to the collection cavity 114, and at least part of the second damping assembly 27 is deformed to flow out of the collection cavity 114.

[0065] Combination Figure 1-3 As shown, piston 21 is a bowl-shaped structure with an opening at the lower end. Piston ring 213 is installed on the outside through a serrated structure. Piston ring 213 contacts the inner wall of shock absorber 3. The piston 21 of the recovery valve 2 is provided with a mounting cavity 214. The first damping component 23 is installed in the mounting cavity 214. The second damping component 27 can be connected to the side of piston 21 away from mounting cavity 214 through the second connector 26. The second connector 26 is a riveted pin.

[0066] Combination Figure 7 As shown, the first damping component 23 is close to the collecting chamber 114, and the second damping component 27 is away from the collecting chamber 114. When the shock absorber 3 is in its compression stroke, the oil flows from the first chamber 31 to the first valve hole 212. Since the first valve hole 212 is blocked by the first damping component 23 located in the mounting chamber 214, the oil can cause local deformation of the first damping component 23 after entering, so that the oil can enter the collecting chamber 114 through the first valve hole 212. At this time, the oil generates damping during the process of entering the collecting chamber 114, which improves the stability of the piston 21 of the shock absorber 3 and has a certain buffering effect. This damping force can absorb vibration, convert vibration energy into heat energy and dissipate it into the atmosphere, thereby reducing the vibration and bumpiness of the vehicle.

[0067] In other words, the first damping assembly 23 is adapted to block the first valve hole 212 from the inner mounting cavity 214, and when the blockage deforms, the first valve hole 212 communicates with the collecting cavity 114. The second damping assembly 27 is adapted to block the second valve hole 211 from the outer side of the piston 21, and when the blockage deforms, the second valve hole 211 communicates with the collecting cavity 114. The first damping assembly 23 may be at least partially made of an elastic material, deformed by the pressure of the oil when the oil flows in, and the first damping assembly 23 can return to its original position when the pressure disappears in the direction from the side of the second damping assembly 27 to the first damping assembly 23.

[0068] Similarly, during the reset stroke of the damper 3, the oil flows from the second chamber 32 of the damper 3 to the collection chamber 114, and then flows through the collection chamber 114 to the second valve port 211. The second valve port 211 is blocked by the second damping component 27, which is also made of at least part of an elastic material. The oil pushes and deforms part of the second damping component 27 to open the second valve port 211, so that the oil can flow from the collection chamber 114 through the second valve port 211 into the first chamber 31 of the damper 3. At this time, the second damping component 27 has a certain damping force on the oil, so that this damping force absorbs vibration.

[0069] In some embodiments, the first damping component 23 includes a compensating valve plate 231 and a spring plate assembly. Both the compensating valve plate 231 and the spring plate assembly are provided with a through hole 234. After the compensating valve plate 231 is deformed, the oil flows from the first valve hole 212 to the through hole 234 and then to the collection chamber 114.

[0070] That is Figure 8 In the compression stroke of the damper 3, when the oil enters through the first valve hole 212 and the pressure increases, it squeezes the end of the compensation valve plate 231. The compensation valve plate 231 squeezes the spring assembly, so that a channel for oil flow is formed between the compensation valve plate 231 and the inner bottom wall of the mounting cavity 214. The middle part of the compensation valve plate 231 is provided with a through hole 234, and the middle part of the spring assembly is also provided with a through hole 234, so that the oil flows from the first valve hole 212 to the through hole 234 and then to the collection cavity 114, realizing the flow of oil.

[0071] In some embodiments, the restoration valve 2 further includes a diameter adjustment member 22, a compensation valve plate 231 and a spring plate assembly are sequentially disposed on the inner peripheral wall of the diameter adjustment member 22, and the diameter adjustment member 22 is installed in the mounting cavity 214 such that the compensation valve plate 231 is opposite to the first valve hole 212.

[0072] Continue to refer to Figures 1-3 As shown, the diameter adjusting member 22 is configured as a circular ring structure, and the compensating valve plate 231 and the spring plate assembly are distributed axially and locked on the inner peripheral wall of the diameter adjusting member 22. Thus, the coaxiality of the compensating valve plate 231 and the spring plate assembly is limited by the diameter adjusting member 22. The diameter adjusting member 22 is installed in the mounting cavity 214 of the restoration valve 2 with a slight interference fit. Thus, the assembly process is simple, the stability and coaxiality are good, and the operation is more stable.

[0073] Additionally, it should be noted that since the diameter adjusting component 22 is a machined part, while the piston 21 is a molded part, this embodiment of the utility model does not require the creation of a new mold. Instead, by machining diameter adjusting components 22 with different diameters, the diameter of the compensation valve plate 231 can be adjusted. When the diameter of the diameter adjusting component 22 changes, the inner diameter of the piston 21 remains constant. Instead, the diameter of the diameter adjusting component 22 is adjusted by changing the wall thickness of the diameter adjusting component 22. This diameter is the inner diameter of the diameter adjusting component 22, which is equivalent to the diameter of the compensation valve plate 231. This allows for the adjustment of the diameter of the compensation valve plate 231 during the vehicle calibration process. On the one hand, this improves the versatility of the piston 21, and on the other hand, it reduces the cost of vehicle calibration.

[0074] In some embodiments, the spring assembly includes an elastic sheet 232 and an elastic support 233, with the elastic sheet 232 located between the compensation valve sheet 231 and the elastic support 233, and a portion of the overflow valve 1 pressing against the elastic support 233.

[0075] In practice, the elastic plate 232 is a claw spring, and the elastic support 233 is a spring support plate. That is, the elastic plate 232 is supported between the compensating valve plate 231 and the elastic support 233. Figure 1 and Figure 8 As shown, the elastic plate 232, the compensating valve plate 231, and the elastic support member 233 are all provided with through holes 234. When the oil flows from the first chamber 31 into the collecting chamber 114, it squeezes the edge of the compensating valve plate 231, causing the compensating valve plate 231 to press against the elastic plate 232. The elastic support member 233 supports the elastic plate 232, and the other end of the elastic support member 233 directly or indirectly presses against the overflow valve seat 11. This generates pressure on the compensating valve plate 231 at the first valve hole 212, causing the oil to push aside the edge of the compensating valve plate 231 and enter the collecting chamber 114. Thus, the elastic plate assembly can support the compensating valve plate 231, and the elastic plate 232 can cooperate with the local deformation of the compensating valve plate 231.

[0076] In some embodiments, the second damping assembly 27 includes a restoring valve plate 24, a limiting plate 25, and a second connector 26. The limiting plate 25 and the restoring valve plate 24 are axially distributed and connected to the piston 21 through the second connector 26. The limiting plate 25 presses against and limits the middle part of the restoring valve plate 24. The edge portion of the restoring valve plate 24 blocks the second valve hole 211 and opens the second valve hole 211 when deformed.

[0077] Reference Figure 7As shown, the recovery valve plate 24 and the limiting plate 25 are connected to the outside of the piston 21 by riveting pins, and the diameter of the recovery valve plate 24 is larger than the diameter of the limiting plate 25. The limiting plate 25 is on the side of the recovery valve plate 24 away from the mounting cavity 214. At the same time, the edge of the recovery valve plate 24 blocks the second valve hole 211 from the outside of the piston 21. During the recovery stroke of the shock absorber 3, the oil flows from the second cavity 32 to the collecting cavity 114, and from the collecting cavity 114 to the first... When the oil reaches the second valve hole 211, it flows out through the second valve hole 211 and presses against the edge of the recovery valve plate 24, thereby opening the second valve hole 211. The oil flows from the second valve hole 211 to the first chamber 31 of the damper 3. At this time, the oil is damped at the positions of the second valve hole 211 and the recovery valve plate 24, preventing the oil from suddenly flowing out and causing bubbles or vortices, which would affect stability. In other words, this damping force can improve the smoothness of the piston 21's movement. The recovery valve plate 24 includes a first recovery valve plate 241 and a second recovery valve plate 242, which can appropriately increase the damping force while ensuring the flow of oil.

[0078] This utility model embodiment discloses a vibration damper 3, including the overflow valve 1 of the vibration damper 3, or the valve assembly of the vibration damper 3, or the recovery valve 2. That is to say, when the vibration damper 3 of this utility model embodiment adopts the structure of the overflow valve 1, since the inner wall of the collecting chamber 114 is at least partially constructed as an arc-shaped wall surface 113, the stability of oil flow can be improved, the impact of drastic pressure changes can be reduced, and noise can be reduced.

[0079] Meanwhile, the elastic element 17 and the overflow valve plate 14 of the overflow valve 1 are separated by bolts, which can reduce the resonance problem between the elastic element 17 and the overflow valve plate 14 and reduce noise. It also prevents the elastic element 17 from scratching the overflow valve plate 14, increases the support area of ​​the overflow valve plate 14, and improves the fatigue performance of the overflow valve plate 14. The recovery valve 2, by installing the spring assembly inside the diameter adjustment member 22 and then continuing to install the diameter adjustment member 22 inside the mounting cavity 214 of the piston 21, reduces the coaxiality difference problem of the elastic plate 232, the compensation valve plate 231, and the elastic support member 233 in the first damping assembly 23, thus improving the stability of the first damping assembly 23 and facilitating installation. Therefore, the noise of the vibration damper 3 is reduced, and the stability of the vibration damper 3's movement is improved.

[0080] This utility model embodiment also discloses a vehicle including the aforementioned shock absorber 3. When the stability of the shock absorber 3 is improved, the shaking and bumping sensation during vehicle operation can be reduced, thereby enhancing the vehicle's stability and safety. Furthermore, when the noise of the shock absorber 3 is reduced, the comfort of the occupants can be improved.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An overflow valve (1) for a vibration damper (3), characterized in that, The shock absorber (3) includes a recovery valve (2) and an overflow valve (1), the overflow valve (1) being adapted to be connected to one side of the recovery valve (2), and the overflow valve (1) comprising: An overflow valve seat (11) is provided, which has a collection chamber (114) and an overflow chamber (117). The collection chamber (114) is open to the recovery valve (2). The overflow chamber (117) is connected to the side of the collection chamber (114) away from the recovery valve (2). A valve body (12) is provided in the overflow chamber (117). At least part of the inner peripheral wall of the collection chamber (114) is constructed as an arc-shaped wall surface (113). The arc-shaped wall surface (113) is constructed such that the inner diameter gradually decreases from the direction close to the recovery valve (2) to the direction away from the recovery valve (2).

2. A valve assembly for a vibration damper (3), characterized in that, The valve assembly includes a recovery valve (2) and an overflow valve (1) of the damper (3) according to claim 1, the valve assembly dividing the cavity of the damper (3) into a first cavity (31) and a second cavity (32); The recovery valve (2) is provided with a first valve hole (212) and a second valve hole (211). The side wall of the overflow valve seat (11) is provided with an oil port (18). The overflow chamber (117) is selectively connected to the oil port (18). During the compression stroke of the damper (3), the oil flows from the first chamber (31) through the first valve hole (212), the collection chamber (114), the overflow chamber (117), and the oil port (18) into the second chamber (32). During the recovery stroke of the damper (3), the oil flows from the second chamber (32) through the oil port (18), the overflow chamber (117), the collection chamber (114), and the second valve hole (211) into the first chamber (31).

3. The valve assembly of the damper (3) according to claim 2, characterized in that, The valve body (12) is movable relative to the overflow valve seat (11). During the compression stroke of the damper (3), the oil enters the collection chamber (114) from the first valve hole (212) and flows into the overflow chamber (117) to push the valve body (12) open, so that the valve body (12) and the overflow valve seat (11) form a flow channel (116). The oil flows through the flow channel (116) along the oil port (18) to the second chamber (32). During the recovery stroke of the damper (3), the oil passes through the oil port (18), the flow channel (116), the collection chamber (114) in sequence and flows through the second valve hole (211) to the first chamber (31).

4. The valve assembly of the damper (3) according to claim 3, characterized in that, The valve body (12) and the overflow valve seat (11) are movably connected by an elastic component.

5. The valve assembly of the damper (3) according to claim 4, characterized in that, The elastic component includes a first connector (15), an overflow valve plate (14), and an elastic element (17); The first connector (15) is connected to a limiting part (16), the limiting part (16) extends radially along the first connector (15), the overflow valve plate (14) is located between the limiting part (16) and the overflow valve seat (11), the elastic member (17) is sleeved on the first connector (15) and located between the valve body (12) and the limiting part (16), and the flow channel (116) is formed when the valve body (12) and the overflow valve plate (14) are separated.

6. The valve assembly of the damper (3) according to claim 5, characterized in that, The first connector (15) is constructed as a bolt, and the limiting part (16) is constructed as a nut, which presses the overflow valve plate (14) against the overflow valve seat (11).

7. The valve assembly of the damper (3) according to claim 2, characterized in that, The overflow valve seat (11) also includes a throttling orifice (115), which connects the collection chamber (114) and the second chamber (32). During the compression stroke of the damper (3), the oil flows from the collection chamber (114) through the throttling orifice (115) into the second chamber (32). During the recovery stroke of the damper (3), the oil flows from the second chamber (32) through the throttling orifice (115) into the collection chamber (114).

8. A recovery valve (2), characterized in that, A valve assembly applicable to the damper (3) according to any one of claims 2-7 includes a piston (21), a first damping assembly (23) and a second damping assembly (27), wherein the first valve port (212) and the second valve port (211) are disposed in the piston (21), the piston (21) is provided with a mounting cavity (214), the first damping assembly (23) is mounted in the mounting cavity (214), and the second damping assembly (27) is mounted on the side of the piston (21) opposite to the mounting cavity (214); During the compression stroke of the damper (3), the oil is adapted to flow from the first chamber (31) to the first valve port (212) and to deform at least part of the first damping assembly (23) to flow into the collection chamber (114). During the reset stroke of the damper (3), the oil is adapted to flow through the second chamber (32) to the collection chamber (114) and to deform at least part of the second damping assembly (27) to flow out of the collection chamber (114).

9. The recovery valve (2) according to claim 8, characterized in that, The first damping component (23) includes a compensating valve plate (231) and a spring plate assembly. Both the compensating valve plate (231) and the spring plate assembly are provided with a through hole (234). After the compensating valve plate (231) is deformed, the oil flows from the first valve hole (212) to the through hole (234) and then to the collection chamber (114).

10. The recovery valve (2) according to claim 9, characterized in that, It also includes a diameter adjustment component (22), wherein the compensation valve plate (231) and the spring plate assembly are sequentially disposed on the inner peripheral wall of the diameter adjustment component (22), and the diameter adjustment component (22) is installed in the mounting cavity (214) such that the compensation valve plate (231) is opposite to the first valve hole (212).

11. The recovery valve (2) according to claim 9, characterized in that, The spring assembly includes an elastic sheet (232) and an elastic support (233). The elastic sheet (232) is located between the compensation valve sheet (231) and the elastic support (233). A portion of the overflow valve (1) presses against the elastic support (233).

12. The recovery valve (2) according to claim 8, characterized in that, The second damping assembly (27) includes a restoring valve plate (24), a limiting plate (25), and a second connector (26). The limiting plate (25) and the restoring valve plate (24) are axially distributed and connected to the piston (21) through the second connector (26). The limiting plate (25) presses against and limits the middle part of the restoring valve plate (24). The edge part of the restoring valve plate (24) blocks the second valve hole (211) and opens the second valve hole (211) when deformed.

13. A vibration damper (3), characterized in that, The damper (3) includes the overflow valve (1) of the damper (3) according to claim 1, or the valve assembly of the damper (3) according to any one of claims 2-7, or the recovery valve according to any one of claims 8-12.

14. A vehicle, characterized in that, Includes the vibration damper (3) as described in claim 13.

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