A double-sided piston valve train and shock absorber

Abstract

The utility model discloses a kind of double-sided piston valve system and shock absorber in the technical field of shock absorber, including piston valve main body, the compression end end face of piston valve main body is provided with compression oil outlet, the recovery end end face of piston valve main body is provided with recovery oil outlet;Compression end valve piece assembly, compression end valve piece assembly is set in compression end end face one side;Compression blocking hole valve piece, compression blocking hole valve piece is axially clamped between compression end valve piece assembly and compression end end face and covers on part compression oil outlet;Recovery end valve piece assembly, recovery end valve piece assembly is set in recovery end end face one side;Recovery blocking hole valve piece, recovery blocking hole valve piece is axially clamped between recovery end valve piece assembly and recovery end end face and covers on part recovery oil outlet.The utility model realizes the adjustment of flow area in compression stroke and recovery stroke of piston valve main body, not only make double-sided piston valve system can satisfy the requirement of multiple flow area, also reduce the production cost of double-sided piston valve system.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, specifically to a double-sided piston valve system and vibration damper. Background Technology

[0002] The shock absorber is a crucial component in automobiles. Its primary function is to connect the vehicle body and chassis, limit the vertical travel of the wheels, and dampen vehicle vibrations, significantly impacting the vehicle's comfort, safety, stability, and handling. The shock absorber works by the continuous reciprocating motion of a piston, causing fluid to circulate between different chambers. This fluid movement utilizes viscous friction to create damping force, which impedes the fluid's movement, thus suppressing vehicle vibrations and converting the vehicle's kinetic energy into heat dissipated into the air. The piston-valve system is one of the most critical components of the shock absorber; its structure determines the accuracy and stability of the damping force, playing a vital role in the actual functional operation of the shock absorber.

[0003] For existing piston valve systems, their main function is to adjust the restoring damping force. Generally, the adjustment range of the restoring damping force is relatively large, but the function of adjusting the compression damping force is relatively weak. The adjustment range of the compression damping force is small, making it difficult to accurately adjust and match the piston compression performance. In some scenarios, the piston compression performance cannot meet the customer's performance requirements, thus affecting the comfort and operability requirements of the whole vehicle.

[0004] To meet the different damping force requirements of different customers, existing piston valve systems require pistons with different throttling areas. This necessitates the creation of molds for pistons with various throttling areas, which increases production costs. Furthermore, using pistons produced from different molds during debugging reduces the consistency of the piston valve system, increases debugging complexity, and makes it more difficult and time-consuming to achieve the target damping force.

[0005] The existing piston valve system uses a straight-hole piston. In order to meet the oil inlet requirements of the flow hole, an oil inlet notch needs to be set on the valve line surface. However, this will result in the valve plate at the oil inlet notch lacking valve line support. During the long-term use of the shock absorber, the piston will continuously reciprocate. The unsupported part of the valve plate at the notch is prone to deformation under long-term oil impact, which will cause a significant decrease in the damping force of the shock absorber, making the shock absorber unable to work properly and thus shortening the normal service life of the shock absorber.

[0006] In summary, how to reduce the production cost of vibration dampers while meeting customers' requirements for different damping forces has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the purpose of this utility model is to provide a double-sided piston valve system to address the above-mentioned technical problems, so as to reduce the production cost of the shock absorber and meet the customer's requirements for different damping forces.

[0008] The technical solution adopted in this utility model is a double-sided piston valve system, comprising:

[0009] The piston valve body has a compression outlet on the compression end face and a recovery outlet on the recovery end face.

[0010] A compression end valve plate assembly, wherein the compression end valve plate assembly is disposed on one side of the compression end face;

[0011] A compression baffle valve plate is axially clamped and fixed between the compression end valve plate assembly and the compression end face, and the compression baffle valve plate covers part of the compression oil outlet.

[0012] A recovery end valve plate assembly, wherein the recovery end valve plate assembly is disposed on one side of the recovery end face;

[0013] The recovery orifice valve plate is axially clamped and fixed between the recovery end valve plate assembly and the recovery end face, and the recovery orifice valve plate covers part of the recovery oil outlet.

[0014] Preferably, a recovery oil inlet is provided on the compression end side of the piston valve body, and the recovery oil inlet is connected to the recovery oil outlet through a recovery oil passage provided inside the piston valve body; a compression oil inlet is provided on the recovery end side of the piston valve body, and the compression oil inlet is connected to the compression oil outlet through a compression oil passage provided inside the piston valve body.

[0015] Preferably, the oil recovery passage and the oil compression passage are arranged axially inside the piston valve body, and the plurality of oil recovery passages and the plurality of oil compression passages are distributed circumferentially around the axis of the piston valve body, and the oil recovery passages and the oil compression passages are alternately distributed in the circumferential direction of the piston valve body.

[0016] Preferably, an external valve line is provided on the end face of the compression end, the radial dimension of which is greater than the radial dimension of the compression baffle valve plate, and an external valve line is provided on the end face of the recovery end, the radial dimension of which is greater than the radial dimension of the recovery baffle valve plate.

[0017] Preferably, the axial dimension of the outer valve line on the compression end face is 0.6mm-1mm, and the axial dimension of the compression baffle valve plate is 0-0.05mm larger than the axial dimension of the outer valve line on the compression end face; the axial dimension of the outer valve line on the recovery end face is 0.6mm-1mm, and the axial dimension of the recovery baffle valve plate is 0-0.05mm larger than the axial dimension of the outer valve line on the recovery end face.

[0018] Preferably, the compression end valve plate assembly includes a compression support plate, a compression star-shaped valve plate, a compression gasket, and a compression spring valve plate sequentially sleeved on the piston rod along the axial direction. One end of the compression support plate abuts axially with the positioning boss of the piston rod, and one end of the compression spring valve plate abuts axially with the compression stop valve plate.

[0019] Preferably, the compression end valve plate assembly includes a compression support plate, a high-speed compression valve plate, and a compression spring valve plate sequentially sleeved on the piston rod along the axial direction. One end of the compression support plate abuts axially with the positioning boss of the piston rod, and one end of the compression spring valve plate abuts axially with the compression stop valve plate. The number of the high-speed compression valve plate and the compression spring valve plate are both multiple.

[0020] Preferably, the recovery valve plate assembly includes a recovery throttling valve plate, a first recovery spring valve plate, a recovery preload valve plate, a second recovery spring valve plate, a recovery high-speed valve plate, and a recovery support plate, which are sequentially sleeved on the piston rod in the axial direction. One end of the recovery throttling valve plate abuts axially with the recovery stop valve plate, and a recovery nut is threadedly connected to the end of the piston rod. The recovery nut abuts axially with the recovery support plate.

[0021] Preferably, the piston valve body includes a piston body and a rubber sheet, wherein the rubber sheet is disposed in the middle of the piston body and the radial dimension of the middle of the piston valve body is greater than the radial dimension of both ends.

[0022] The second objective of this utility model is to provide a vibration damper, which includes the aforementioned double-sided piston valve system.

[0023] The beneficial effects of this utility model are:

[0024] This invention features a compression baffle valve plate axially clamped between the compression end face of the piston valve body and the compression end valve plate assembly, and a recovery baffle valve plate axially clamped between the recovery end face of the piston valve body and the recovery end valve plate assembly. By using the compression baffle valve plate to block the compression outlet on the compression end face and the recovery baffle valve plate to block the recovery outlet on the recovery end face, the flow area of ​​the piston valve body during the compression and recovery strokes is adjusted. This not only enables the double-sided piston valve system to meet various flow area requirements but also reduces the production cost of the double-sided piston valve system. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the double-sided piston valve system of this utility model;

[0026] Figure 2 This is one of the exploded structural diagrams of the double-sided piston valve system of this utility model;

[0027] Figure 3 This is the second exploded structural diagram of the double-sided piston valve system of this utility model;

[0028] Figure 4 This is a schematic diagram of the piston valve body.

[0029] Figure 5 A first-view perspective three-dimensional schematic diagram of the piston valve body;

[0030] Figure 6 This is a second-view three-dimensional schematic diagram of the piston valve body;

[0031] Figure 7 This is a schematic diagram of the end structure of the piston rod;

[0032] Figure 8 This is a dimensional drawing of the compression end face;

[0033] Figure 9 This is a dimensional drawing of the restored end face.

[0034] Explanation of the reference numerals in the figure:

[0035] 100. Piston valve body;

[0036] 110. Compression end face; 111. Compression oil outlet; 112. External valve line on the compression end face;

[0037] 120. Restore the end face; 121. Restore the oil outlet; 122. Restore the external valve line on the end face;

[0038] 130. Compression end side; 131. Restored oil inlet;

[0039] 140. Side of the recovery end; 141. Compression oil inlet;

[0040] 150. Restore the original oil passage;

[0041] 160. Compression oil passage;

[0042] 170. Piston body;

[0043] 180. Rubber sheet;

[0044] 200. Compression end valve plate assembly; 210. Compression support plate; 220. Compression star valve plate; 230. Compression gasket; 240. Compression spring valve plate; 250. Compression high-speed valve plate;

[0045] 300. Compression baffle valve plate;

[0046] 400, Restoration end valve plate assembly; 410, Restoration throttle valve plate; 420, First restoration spring valve plate; 430, Restoration preload valve plate; 440, Second restoration spring valve plate; 450, Restoration high-speed valve plate; 460, Restoration support plate;

[0047] 500. Restoration of the retaining valve plate;

[0048] 600, Piston rod; 610, Positioning boss; 620, Optical shaft section; 630, Threaded section;

[0049] 700. Restoring nut. Detailed Implementation

[0050] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0051] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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 on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] 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 according to the specific circumstances.

[0053] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0054] Examples, such as Figures 1-9As shown, a double-sided piston valve system includes: a piston valve body 100, a compression end valve plate assembly 200, a compression baffle valve plate 300, a recovery end valve plate assembly 400, and a recovery baffle valve plate 500.

[0055] A compression outlet 111 is provided on the compression end face 110 of the piston valve body 100, and a recovery outlet 121 is provided on the recovery end face 120 of the piston valve body 100.

[0056] The compression end valve plate assembly 200 is disposed on one side of the compression end face 110.

[0057] The compression baffle valve plate 300 is axially clamped and fixed between the compression end valve plate assembly 200 and the compression end face 110, and the compression baffle valve plate 300 covers part of the compression oil outlet 111.

[0058] The recovery end valve plate assembly 400 is located on one side of the recovery end face 120.

[0059] The restoration orifice valve plate 500 is axially clamped and fixed between the restoration end valve plate assembly 400 and the restoration end face 120, and the restoration orifice valve plate 500 covers part of the restoration oil outlet 121.

[0060] This invention features a compression baffle valve 300 axially clamped between the compression end face 110 of the piston valve body 100 and the compression end valve plate assembly 200, and a recovery baffle valve 500 axially clamped between the recovery end face 120 of the piston valve body 100 and the recovery end valve plate assembly 400. Through the blocking effect of the compression baffle valve 300 on the compression outlet 111 on the compression end face 110, and the blocking effect of the recovery baffle valve 500 on the recovery outlet 121 on the recovery end face 120, the flow area of ​​the piston valve body 100 during the compression and recovery strokes is adjusted. This not only enables the double-sided piston valve system to meet various flow area requirements but also reduces the production cost of the double-sided piston valve system.

[0061] Specific embodiment 1, such as Figures 1-9 As shown, a double-sided piston valve system includes: a piston valve body 100, a compression end valve plate assembly 200, a compression baffle valve plate 300, a recovery end valve plate assembly 400, a recovery baffle valve plate 500, a piston rod 600, and a recovery nut 700.

[0062] The piston valve body 100 is sleeved on one end of the piston rod 600, and the piston valve body 100 has a compression end face 110 and a recovery end face 120. That is, the axial end face of the piston valve body 100 is the compression end face 110, and the axial end face of the piston valve body 100 is the recovery end face 120.

[0063] like Figure 4 and Figure 5 As shown, a compression outlet 111 is provided on the compression end face 110 of the piston valve body 100. An external valve line 112 is formed on the compression end face 110 of the piston valve body 100. The external valve line 112 is located at the edge of one axial end of the piston valve body 100 and extends along the axial direction of the piston valve body 100. That is, the external valve line 112 is integrally formed on the edge of the compression end face 110 and extends along the axial direction of the piston valve body 100.

[0064] There are multiple compression oil outlets 111, such as 3-6, and the multiple compression oil outlets 111 are evenly distributed around the axis of the piston valve body 100.

[0065] like Figure 4 and Figure 6 As shown, a recovery oil outlet 121 is provided on the recovery end face 120 of the piston valve body 100, and a recovery end face outer valve line 122 is formed on the recovery end face 120 of the piston valve body 100. The recovery end face outer valve line 122 is located at the edge position of the other end of the piston valve body 100 in the axial direction, and the recovery end face outer valve line 122 extends along the axial direction of the piston valve body 100. That is, the recovery end face outer valve line 122 is integrally formed at the edge position of the recovery end face 120, and the recovery end face outer valve line 122 extends along the axial direction of the piston valve body 100.

[0066] The number of the restoration oil outlet 121 is multiple, such as 3-6, and the multiple restoration oil outlets 121 are evenly distributed around the axis of the piston valve body 100.

[0067] In the axial direction of the piston valve body 100, the radial dimension of the middle part of the piston valve body 100 is greater than the radial dimensions of both ends of the piston valve body 100. That is, the outer circumferential surface of one axial end of the piston valve body 100 is the compression end side surface 130, and the radial dimension of the compression end side surface 130 is smaller than the radial dimension of the middle part of the piston valve body 100. The outer circumferential surface of the other axial end of the piston valve body 100 is the recovery end face 120, and the radial dimension of the recovery end side surface 140 is smaller than the radial dimension of the middle part of the piston valve body 100.

[0068] In an optional specific embodiment, as shown in 4, the piston valve body 100 includes a piston body 170 and a rubber sheet 180. A plurality of fixing grooves are formed in the middle of the outer circumferential surface of the piston body 170. The rubber sheet 180 is sleeved on the outer circumferential surface of the piston valve body 100, and the boss on the inner circumferential surface of the rubber sheet 180 is embedded in the fixing groove, so that the piston body 170 and the rubber sheet 180 are axially fixedly connected. The outer diameter of the rubber sheet 180 is larger than the radial dimensions at both ends of the piston body 170, so that the radial dimension at the middle of the piston valve body 100 is larger than the radial dimensions at both ends.

[0069] like Figure 4 , Figure 5 and Figure 6 As shown, a compression inlet 141 is provided on the side 140 of the recovery end of the piston valve body 100. There are multiple compression inlets 141, such as 3-6, and the multiple compression inlets 141 are evenly distributed around the axis of the piston valve body 100. The number of compression inlets 141 is equal to the number of compression outlets 111. A compression oil passage 160 is formed inside the piston valve body 100. One end of the compression oil passage 160 is connected to the compression inlet 141, and the other end of the compression oil passage 160 is connected to the compression outlet 111. This allows the oil in the recovery chamber of the shock absorber to flow to the compression chamber during the compression stroke.

[0070] A recovery oil inlet 131 is provided on the compression end side 130 of the piston valve body 100. There are multiple recovery oil inlets 131, such as 3-6, and multiple recovery oil outlets 121 are evenly distributed around the axis of the piston valve body 100. The number of recovery oil inlets 131 is equal to the number of recovery oil outlets 121. A recovery oil passage 150 is formed inside the piston valve body 100. One end of the recovery oil passage 150 is connected to the recovery oil inlet 131, and the other end of the recovery oil passage 150 is connected to the recovery oil outlet 121. This allows the oil in the compression chamber of the shock absorber to flow to the recovery chamber during the recovery stroke.

[0071] In one optional specific embodiment, such as 4, Figure 5 and Figure 6As shown, five compression oil outlets 111 are provided on the compression end face 110 of the piston valve body 100, five recovery oil inlets 131 are provided on the compression end side face 130 of the piston valve body 100, five recovery oil outlets 121 are provided on the recovery end face 120 of the piston valve body 100, and five compression oil inlets 141 are provided on the recovery end side face 140 of the piston valve body 100. Five recovery oil passages 150 and five compression oil passages 160 are formed inside the piston valve body 100, and the recovery oil passages 150 and compression oil passages 160 are both arranged along the axial direction of the piston valve body 100. The five recovery oil passages 150 and five compression oil passages 160 are alternately distributed in the circumferential direction of the piston valve body 100.

[0072] The compression inlet 141 is formed along the radial direction of the piston valve body 100 on the recovery end side 140. The compression inlet 141 is connected to one end of the compression oil passage 160, and the opening size of the compression inlet 141 near the compression oil passage 160 is smaller than the opening size of the compression inlet 141 away from the compression oil passage 160, that is, the compression inlet 141 is generally funnel-shaped. The recovery inlet 131 is formed along the radial direction of the piston valve body 100 on the compression end side 130. The recovery inlet 131 is connected to one end of the recovery oil passage 150, and the opening size of the recovery inlet 131 near the recovery oil passage 150 is smaller than the opening size of the recovery inlet 131 away from the recovery oil passage 150, that is, the recovery inlet 131 is generally funnel-shaped.

[0073] The compression end valve plate assembly 200 is disposed on one side of the compression end face 110.

[0074] It should be noted that the compression end valve plate assembly 200 can be any known compression end valve plate assembly 200 in the prior art, such as... Figure 2 As shown below, only as an example, a novel compression end valve plate assembly 200 is described in detail. The compression end valve plate assembly 200 includes a compression support plate 210, a compression star valve plate 220, a compression gasket 230, and a compression spring valve plate 240 sequentially sleeved on the piston rod 600 in the axial direction. One end of the compression support plate 210 axially abuts against the positioning boss 610 of the piston rod 600, and one end of the compression spring valve plate 240 axially abuts against the compression stop valve plate 300. The compression star valve plate 220 and the compression gasket 230 are installed between the compression support plate 210 and the compression spring valve plate 240.

[0075] In one optional specific embodiment, such as Figure 3As shown, the compression end valve plate assembly 200 includes a compression support plate 210, a high-speed compression valve plate 250, and a compression spring valve plate 240 sequentially sleeved on the piston rod 600 along the axial direction. One end of the compression support plate 210 axially abuts against the positioning boss 610 of the piston rod 600, and one end of the compression spring valve plate 240 axially abuts against the compression stop valve plate 300. The high-speed compression valve plate 250 is installed between the compression support plate 210 and the compression spring valve plate 240, and there are multiple high-speed compression valve plates 250 and compression spring valve plates 240, so that the piston compression damping performance can be adjusted by increasing or decreasing the number of high-speed compression valve plates 250 and compression spring valve plates 240.

[0076] The compression baffle valve plate 300 is axially clamped and fixed between the compression end valve plate assembly 200 and the compression end face 110. That is, the compression baffle valve plate 300 is sleeved on the optical axis section 620 at the end of the piston rod 600, and one end face of the compression baffle valve plate 300 abuts axially with the compression end valve plate assembly 200, and the other end face of the compression baffle valve plate 300 is tightly fitted with the compression end face 110.

[0077] like Figure 8 As shown, the radial dimension of the outer valve line 112 of the compression end face is larger than the radial dimension of the compression baffle valve plate 300, so that the outer valve line 112 of the compression end face can support the compression end valve plate assembly 200, and the compression baffle valve plate 300 covers part of the compression outlet 111, so that the flow area of ​​the compression outlet 111 can be adjusted by replacing the compression baffle valve plate 300 with different radial dimensions; that is, the distance between the outer wall of the compression outlet 111 and the axis of the piston valve body 100 is R1, the distance between the inner wall of the compression outlet 111 and the axis of the piston valve body 100 is R2, the radial dimension of the compression baffle valve plate 300 is R3, and R2≤R3≤R1.

[0078] In one optional specific embodiment, such as 1 and Figure 4 As shown, the axial dimension of the outer valve line 112 on the compression end face is 0.6mm-1mm, which means the height of the outer valve line 112 on the compression end face is 0.6mm-1mm, and the outer valve line 112 on the compression end face extends 0.6mm-1mm axially from the end face 110 on the compression end face. The axial dimension of the compression baffle valve plate 300 is 0-0.05mm larger than the axial dimension of the outer valve line 112 on the compression end face, which means the axial dimension of the compression baffle valve plate 300 is 0.6mm-1.05mm, so that the compression end valve plate assembly 200 can have a larger opening degree at the same speed when opening the valve at low speed.

[0079] The recovery end valve plate assembly 400 is located on one side of the recovery end face 120.

[0080] It should be noted that the recovery end valve plate assembly 400 can be any known recovery end valve plate assembly 400 in the prior art, such as... Figure 2 and Figure 3 As shown below, only as an example, a novel recovery end valve plate assembly 400 is described in detail. This recovery end valve plate assembly 400 includes a recovery throttling valve plate 410, a first recovery spring valve plate 420, a recovery preload valve plate 430, a second recovery spring valve plate 440, a recovery high-speed valve plate 450, and a recovery support plate 460, sequentially sleeved on the piston rod 600 along the axial direction. One end of the recovery throttling valve plate 410 axially abuts against the recovery baffle valve plate 500, that is, one end face of the recovery throttling valve plate 410 is tightly fitted with one end face of the recovery baffle valve plate 500. A threaded connection is made to the end of the piston rod 600. A restoring nut 700 is axially abutted against the restoring support plate 460; a first restoring spring valve plate 420 is installed between the restoring throttle valve plate 410 and the restoring preload valve plate 430; a second restoring spring valve plate 440 is installed between the restoring preload valve plate 430 and the restoring high-speed valve plate 450; one end of the restoring high-speed valve plate 450 is axially abutted against the restoring support plate 460; and there are multiple first and second restoring spring valve plates 420 and 440, so that the piston restoring damping performance can be adjusted by increasing or decreasing the number of first and second restoring spring valve plates 420 and 440.

[0081] The restoration orifice valve plate 500 is axially clamped and fixed between the restoration end valve plate assembly 400 and the restoration end face 120. That is, the restoration orifice valve plate 500 is sleeved on the optical axis section 620 at the end of the piston rod 600, and one end face of the restoration orifice valve plate 500 abuts axially with the restoration end valve plate assembly 400, while the other end face of the restoration orifice valve plate 500 is tightly fitted with the restoration end face 120.

[0082] like Figure 9 As shown, the radial dimension of the outer valve line 122 of the recovery end face is larger than the radial dimension of the recovery baffle valve plate 500, so that the outer valve line 122 of the recovery end face can support the recovery end valve plate assembly 400, and the recovery baffle valve plate 500 covers part of the recovery oil outlet 121, so that the size of the flow area of ​​the recovery oil outlet 121 can be adjusted by replacing the recovery baffle valve plate 500 with different radial dimensions; that is, the distance between the outer wall of the recovery oil outlet 121 and the axis of the piston valve body 100 is R4, the distance between the inner wall of the recovery oil outlet 121 and the axis of the piston valve body 100 is R5, the radial dimension of the recovery baffle valve plate 500 is R6, and R5≤R6≤R4.

[0083] In one optional specific embodiment, such as 1 and Figure 4As shown, the axial dimension of the outer valve line 122 of the restoration end face is 0.6mm-1mm, that is, the height of the outer valve line 122 of the restoration end face is 0.6mm-1mm, which means that the outer valve line 122 of the restoration end face extends 0.6mm-1mm from the restoration end face 120 in the axial direction; the axial dimension of the restoration stop valve plate 500 is 0-0.05mm larger than the axial dimension of the outer valve line 122 of the restoration end face, that is, the axial dimension of the restoration stop valve plate 500 is 0.6mm-1.05mm, so that the restoration end valve plate assembly 400 can have a larger opening degree at the same speed when opening the valve at low speed.

[0084] like Figure 1 and Figure 7 As shown, a positioning boss 610, a smooth shaft section 620, and a threaded section 630 are integrally formed at the end of the piston rod 600. The positioning boss 610, the smooth shaft section 620, and the threaded section 630 are fixedly connected in the axial direction. The compression end valve plate assembly 200, the compression stop valve plate 300, the piston valve body 100, the recovery stop valve plate 500, and the recovery end valve plate assembly 400 are sequentially sleeved on the smooth shaft section 620 of the piston rod 600. The recovery nut 700 is threadedly connected to the threaded section 630, and one end of the compression end valve plate assembly 200 abuts axially with the positioning boss 610, and the recovery nut 700 abuts axially with the recovery end valve plate assembly 400.

[0085] Specific embodiment 2, a vibration damper, the vibration damper including the above-mentioned double-sided piston valve system.

[0086] The working process of the double-sided piston valve system of this utility model is as follows:

[0087] The compression and recovery inlets on the double-sided piston valve system are both oblique holes, evenly and alternately distributed in the circumferential direction. Complete outer valve lines are formed at the edges of the compression and recovery end faces, without any gaps, providing complete support for the compression and recovery valve plate assemblies, thus increasing the lifespan of the double-sided piston valve system. Baffle valve plates are installed inside the outer valve lines at both ends of the piston valve body. By blocking the compression and recovery outlets with these baffle valve plates, the flow area of ​​the double-sided piston valve system can be flexibly adjusted, allowing a single piston mold to meet various flow area requirements. Furthermore, different types of compression valve plates can be flexibly replaced in the compression end valve assembly, expanding the compression damping force adjustment range of the double-sided piston valve system and enabling it to meet performance requirements in more situations.

[0088] Compared with the prior art, the present invention has at least the following technical effects:

[0089] This invention sets the recovery oil inlet and the compression oil inlet on the sides of both ends of the piston valve body, so that the two ends of the piston valve body can form a complete external valve line structure. This allows the compression end valve plate assembly and the compression end valve plate assembly to be fully supported, avoiding the problem of valve plate parts not being supported due to oil inlet gaps in the piston valve line, and extending the service life of the double-sided piston valve system.

[0090] This invention features an external valve line on both the compression and recovery end faces of the piston valve body. This allows the piston's liquid flow area to be adjusted using a baffle valve plate on both the compression and recovery sides of the piston valve body. A single piston mold can meet the requirements of various flow areas, and the damping force adjustment range on the compression side is consistent with that on the recovery side. This solves the piston adjustment and matching problems caused by the small damping adjustment range on the compression side, and can meet the needs of more customers.

[0091] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A double-sided piston valve system, characterized in that, include: A piston valve body (100) has a compression outlet (111) on the compression end face (110) and a recovery outlet (121) on the recovery end face (120). A compression end valve plate assembly (200) is disposed on one side of the compression end face (110); A compression baffle valve (300) is axially clamped and fixed between the compression end valve assembly (200) and the compression end face (110), and the compression baffle valve (300) covers part of the compression outlet (111). A recovery end valve plate assembly (400) is disposed on one side of the recovery end face (120); The restoration orifice valve plate (500) is axially clamped and fixed between the restoration end valve plate assembly (400) and the restoration end face (120), and the restoration orifice valve plate (500) covers part of the restoration oil outlet (121).

2. The double-sided piston valve system according to claim 1, characterized in that, A recovery oil inlet (131) is provided on the compression end side (130) of the piston valve body (100), and the recovery oil inlet (131) is connected to the recovery oil outlet (121) through a recovery oil passage (150) provided inside the piston valve body (100); a compression oil inlet (141) is provided on the recovery end side (140) of the piston valve body (100), and the compression oil inlet (141) is connected to the compression oil outlet (111) through a compression oil passage (160) provided inside the piston valve body (100).

3. A double-sided piston valve system according to claim 2, characterized in that, The oil recovery passage (150) and the compression passage (160) are arranged axially inside the piston valve body (100). The plurality of oil recovery passages (150) and the plurality of compression passages (160) are circumferentially distributed around the axis of the piston valve body (100), and the oil recovery passages (150) and the compression passages (160) are alternately distributed in the circumferential direction of the piston valve body (100).

4. A double-sided piston valve system according to any one of claims 1-3, characterized in that, A compression end face outer valve line (112) is provided on the compression end face (110), and the radial dimension of the compression end face outer valve line (112) is greater than the radial dimension of the compression stop valve plate (300). A recovery end face outer valve line (122) is provided on the recovery end face (120), and the radial dimension of the recovery end face outer valve line (122) is greater than the radial dimension of the recovery stop valve plate (500).

5. A double-sided piston valve system according to claim 4, characterized in that, The axial dimension of the compression end face outer valve line (112) is 0.6mm-1mm, and the axial dimension of the compression baffle valve plate (300) is 0-0.05mm larger than the axial dimension of the compression end face outer valve line (112); the axial dimension of the recovery end face outer valve line (122) is 0.6mm-1mm, and the axial dimension of the recovery baffle valve plate (500) is 0-0.05mm larger than the axial dimension of the recovery end face outer valve line (122).

6. A double-sided piston valve system according to claim 1, characterized in that, The compression end valve plate assembly (200) includes a compression support plate (210), a compression star valve plate (220), a compression gasket (230), and a compression spring valve plate (240) sequentially sleeved on the piston rod (600) along the axial direction. One end of the compression support plate (210) abuts axially with the positioning boss (610) of the piston rod (600), and one end of the compression spring valve plate (240) abuts axially with the compression stop valve plate (300).

7. A double-sided piston valve system according to claim 1, characterized in that, The compression end valve plate assembly (200) includes a compression support plate (210), a high-speed compression valve plate (250), and a compression spring valve plate (240) sequentially sleeved on the piston rod (600) along the axial direction. One end of the compression support plate (210) abuts axially with the positioning boss (610) of the piston rod (600), and one end of the compression spring valve plate (240) abuts axially with the compression stop valve plate (300). There are multiple high-speed compression valve plates (250) and compression spring valve plates (240).

8. A double-sided piston valve system according to claim 1, characterized in that, The recovery valve assembly (400) includes a recovery throttling valve (410), a first recovery spring valve (420), a recovery preload valve (430), a second recovery spring valve (440), a recovery high-speed valve (450), and a recovery support plate (460) sequentially sleeved on the piston rod (600) along the axial direction. One end of the recovery throttling valve (410) abuts axially with the recovery stop valve (500), and a recovery nut (700) is threadedly connected to the end of the piston rod (600). The recovery nut (700) abuts axially with the recovery support plate (460).

9. A double-sided piston valve system according to claim 1, characterized in that, The piston valve body (100) includes a piston body (170) and a rubber sheet (180). The rubber sheet (180) is disposed in the middle of the piston body (170) and the radial dimension of the middle of the piston valve body (100) is greater than the radial dimension of the two ends.

10. A vibration damper, characterized in that, The vibration damper includes the double-sided piston valve system as described in any one of claims 1-9.

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