CN218992200U - Piston valve for shock absorber, shock absorber and vehicle - Google Patents

Abstract

The utility model discloses a piston valve, a shock absorber and a vehicle, wherein the piston valve comprises: the piston valve body is movably arranged in the outer cylinder of the shock absorber; the insert is fixedly matched with the piston valve body, a compression cavity and a recovery cavity are formed in the cylinder body of the shock absorber, and a first insert flow passage and a second insert flow passage are arranged in the insert; when fluid flows from the recovery chamber to the compression chamber, the maximum flow rate of fluid in the first insert flow passage is greater than the maximum flow rate of fluid in the second insert flow passage; the maximum flow rate of fluid in the second insert flow passage is greater than the maximum flow rate of fluid in the first insert flow passage as fluid flows from the compression chamber to the recovery chamber. Therefore, the insert and the piston valve body are designed in a split mode, and can be manufactured independently, so that the manufacturing difficulty can be reduced, the assembly difficulty of the piston valve can be reduced, and the assembly efficiency can be improved.

Description

Piston valve for shock absorber, shock absorber and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a piston valve for a shock absorber, the shock absorber and a vehicle.

Background

In the related art, a shock absorber of a vehicle is used for preventing a spring from excessively vibrating to play a role in damping, and is widely applied to automobiles, and the working principle of the shock absorber is that when an automobile body vibrates, a piston in the shock absorber moves up and down, fluid in a cylinder of the shock absorber repeatedly flows into one cavity through different holes to form damping force, so that the energy of the vibration of the automobile is converted into fluid heat energy, and the fluid heat energy is absorbed and emitted into the atmosphere by the shock absorber;

the piston valve in the prior art is of an integral structure, the piston valve of the shock absorber needs to meet different damping force requirements, in order to improve the shock absorption performance, a flow regulating valve is generally arranged in a piston, the piston is provided with a piston valve body for installing the flow regulating valve and circulating fluid, the piston valve body in the form is complex in structure, high in manufacturing difficulty and high in assembly difficulty.

Disclosure of Invention

The present utility model aims to solve the above-mentioned problems, and therefore, an object of the present utility model is to provide a piston valve for a shock absorber, which is simple to assemble and easy to replace.

The utility model further provides a shock absorber.

The utility model further provides a vehicle.

The piston valve for a shock absorber according to the present utility model includes: the piston valve body is movably arranged in the outer cylinder of the shock absorber; the insert is fixedly matched with the piston valve body, a compression cavity and a recovery cavity are formed in the cylinder body of the shock absorber, and a first insert flow passage and a second insert flow passage are arranged in the insert; when fluid flows from the recovery chamber to the compression chamber, the maximum flow rate of fluid in the first insert flow passage is greater than the maximum flow rate of fluid in the second insert flow passage; the maximum flow rate of fluid in the second insert flow passage is greater than the maximum flow rate of fluid in the first insert flow passage as fluid flows from the compression chamber to the recovery chamber.

Therefore, according to the piston valve provided by the embodiment of the utility model, the insert and the piston valve body can have respective functions through the split design of the insert and the piston valve body, and can be manufactured independently, so that the manufacturing difficulty can be reduced, the assembly difficulty of the piston valve can be reduced, and the assembly efficiency can be improved. When the piston valves with different specifications are required to be replaced, the whole piston valve is not required to be detached, only the insert part is required to be detached, inserts with different hole structures are required to be replaced, the processing cost is greatly reduced, and the piston valve is easier to detach.

In some examples of the utility model, the insert is fixedly engaged with an inner sidewall of the piston valve body.

In some examples of the utility model, the piston valve body is connected to the outer peripheral wall of the valve body of the shock absorber.

In some examples of the utility model, a bottom surface of the valve body is in abutting engagement with a top surface of the insert to relatively secure the insert within the piston valve body.

In some examples of the utility model, the outer peripheral wall of the insert is in clearance fit with the inner peripheral wall of the piston valve body.

In some examples of the utility model, the insert is located at an end of the piston valve body facing the compression chamber.

In some examples of the utility model, the piston valve body includes: the sleeve part and the boss, the boss set up in sleeve part's orientation towards the one end of compression chamber and radially inwards extend, the mold insert orientation one side surface butt of compression chamber is in on the boss.

In some examples of the utility model, the insert includes: the insert comprises an insert body and a flange, wherein the flange is arranged at the edge of the insert body and extends towards the direction of the recovery cavity, the insert body is provided with a first insert runner and a second insert runner, and one side surface of the flange towards the recovery cavity is in butt fit with one side surface of the valve body towards the compression cavity.

In some examples of the utility model, the inner peripheral wall of the sleeve portion is provided with an internal thread, and the outer peripheral wall of the valve body is provided with an external thread, the internal thread being engaged with the external thread.

In some examples of the present utility model, the piston valve for a shock absorber further includes: the rubber sleeve is sleeved on the outer peripheral surface of the sleeve part, the inner peripheral wall of the rubber sleeve is provided with a bulge, the outer peripheral wall of the sleeve part is provided with a groove, and the bulge is matched in the groove.

In some examples of the utility model, the first insert flow passage includes: a first perforation extending through the insert; the bottom of the insert is provided with a first convex edge, the first convex edge surrounds the first perforation, the first orifice is formed on the first convex edge, and the cross section area of the first perforation is larger than that of the first orifice; the bottom of the insert is also provided with a first elastic sheet, and the first elastic sheet is stopped against the first convex edge and covers the first perforation.

In some examples of the present utility model, the piston valve for a shock absorber further includes: the support seat is arranged on one side of the insert, which faces the compression cavity, and the first elastic sheet is clamped between the support seat and the insert, and the outer diameter of the support seat is smaller than that of the first elastic sheet.

In some examples of the present utility model, the piston valve for a shock absorber further includes: the fastener penetrates through the insert, the first elastic sheet and the supporting seat.

In some examples of the present utility model, an annular avoidance groove is provided at a position of the support seat, which is far away from a side surface of the compression chamber and is close to an edge, so as to avoid the deformed first elastic sheet.

In some examples of the present utility model, the first elastic sheet is a plurality of elastic sheets sequentially stacked in the up-down direction.

In some examples of the utility model, the second insert flow passage includes: a second perforation extending through the insert; a second orifice, wherein a second convex edge is arranged at the top of the insert, the second convex edge surrounds the second perforation, the second orifice is formed on the second convex edge, and the cross-sectional area of the second perforation is larger than that of the second orifice; the surface of one side of the insert, which is far away from the compression cavity, is provided with a second elastic sheet, and the second elastic sheet is stopped against the second convex edge and covers the second perforation.

In some examples of the present utility model, a positioning groove is provided on a side of the insert away from the compression cavity, and the second elastic piece is provided in the positioning groove.

The shock absorber comprises a cylinder body, a piston and a flow regulating valve, wherein the piston is movably arranged on the cylinder body, the flow regulating valve is arranged on the piston and is respectively communicated with the compression cavity and the restoration cavity, and the piston comprises a piston rod and the piston valve for the shock absorber.

The vehicle according to the utility model comprises said shock absorber.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of a partial structure of a shock absorber according to an embodiment of the present utility model;

fig. 2 is an enlarged view of region a in fig. 1;

FIG. 3 is a schematic view of the structure of a piston valve body;

FIG. 4 is a cross-sectional view of a piston valve body;

FIG. 5 is a schematic view of the insert at an angle;

fig. 6 is a schematic view of another angle of the insert.

Reference numerals:

1000. a damper;

100. a piston valve;

10. a piston valve body; 11. a sleeve portion; 111. an internal thread; 112. a groove; 12. a boss;

20. a valve body; 21. an external thread;

30. an insert; 31. an insert body; 32. a flange; 33. a first insert runner; 331. a first perforation; 332. a first orifice;

34. a second insert runner; 341. A second perforation; 342. A second orifice;

35. a first flange; 36. A second convex edge; 37. A positioning groove;

40. a rubber sleeve; 41. a protrusion;

50. a first elastic sheet; 60. a support base; 61. an avoidance groove; 62. a fastener; 70. a second spring plate;

80. a flow regulating valve; 90. compressing the valve plate; 110. a regulating piece;

200. a cylinder; 210. a compression chamber; 220. restoring the cavity.

Detailed Description

Embodiments of the present utility model will be described in detail below, with reference to the accompanying drawings, which are exemplary.

A piston valve 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 6, the piston valve 100 being applied to a shock absorber 1000, the shock absorber 1000 further comprising: the cylinder 200, the piston valve 100 may be movably disposed in the cylinder 200, the piston valve 100 may partition an inner chamber of the cylinder 200 into a compression chamber 210 and a recovery chamber 220, and the shock absorber 1000 may be applied to a vehicle.

As shown in fig. 1 to 6, a piston valve 100 according to an embodiment of the present utility model includes: the piston valve body 10 and the insert 30 are movably arranged in the outer cylinder 200 of the shock absorber 1000, the valve body 20 is connected to the inner peripheral wall of the piston valve body 10, namely, the piston valve body 10 is connected to the outer peripheral wall of the valve body 20 of the shock absorber, and the piston valve body 10 and the insert 30 can be matched through threads, so that the connection reliability can be ensured, and the assembly efficiency can be improved. The valve body 20 can be internally provided with a flow regulating valve 80 for regulating flow, the insert 30 is arranged in the piston valve body 10, the insert 30 is fixedly matched with the piston valve body 10, the insert 30 is divided into a compression cavity 210 and a restoration cavity 220 in the cylinder 200, the flow regulating valve 80 is positioned above the insert 30, the insert 30 is internally provided with a first insert flow channel 33 and a second insert flow channel 34, and when fluid flows from the restoration cavity 220 to the compression cavity 210, the maximum flow velocity of the fluid in the first insert flow channel 33 is greater than the maximum flow velocity of the fluid in the second insert flow channel 34; as fluid flows from compression chamber 210 to recovery chamber 220, the maximum flow rate of fluid in second insert flow passage 34 is greater than the maximum flow rate of fluid in first insert flow passage 33. By providing the insert 30, the oil pressure of the recovery chamber 220 and the oil pressure of the compression chamber 210 can be balanced by controlling the flow direction in the compression chamber 210 and the recovery chamber 220.

Compared to the conventional integrated piston valve, the piston valve 100 of the present utility model adopts the combination of the piston valve body 10 and the insert 30, that is, the insert 30 and the piston valve body 10 are two separate structural members, the piston valve body 10 can be fixedly connected to the valve body 20, the valve body 20 can be fixedly connected to the piston rod, the insert 30 can be installed in the piston valve body 10, the insert 30 can perform a conduction function, the first insert flow channel 33 and the second insert flow channel 34 are formed in the insert 30, the first insert flow channel 33 can allow the fluid in the compression chamber 210 to flow into the recovery chamber 220, and the second insert flow channel 34 can allow the fluid in the recovery chamber 220 to flow into the compression chamber 210. Thus, the insert 30 and the piston valve body 10 can have respective functions, can be manufactured independently, can reduce manufacturing difficulty, can correspondingly increase manufacturing precision of the insert 30 and the piston valve body 10, and can improve structural reliability of the insert 30 and the piston valve body 10.

In addition, the insert 30 is in abutting fit with the valve body 20 in the piston valve body 10, so that the insert 30 can be effectively positioned, the positioning mode is simple and reliable, the assembly difficulty of the piston valve 100 can be reduced, and the assembly efficiency can be improved.

Thus, according to the piston valve 100 of the embodiment of the present utility model, by separately designing the insert 30 and the piston valve body 10, the insert 30 and the piston valve body 10 can have respective functions, and can be manufactured separately, so that the manufacturing difficulty can be reduced, the assembling difficulty of the piston valve 100 can be reduced, and the assembling efficiency can be improved. When the piston valve 100 with different specifications needs to be replaced, the whole piston valve 100 does not need to be disassembled, only the insert 30 part needs to be disassembled, the inserts 30 with different hole structures need to be replaced, the processing cost is greatly reduced, and the assembly and the disassembly are easier.

According to an alternative embodiment of the present utility model, as shown in fig. 2, the outer peripheral wall of the insert 30 is fixedly fitted with the inner peripheral wall of the piston valve body 10. That is, the insert 30 is integrally provided in the piston valve body 10, and the two can be fixedly fitted through the peripheral wall, so that a new fixing structure is not required, the structures of the piston valve body 10 and the insert 30 can be simplified, and the assembly efficiency of the piston valve body 10 and the insert 30 can be improved.

Wherein the bottom surface of the valve body 20 is in abutting engagement with the top surface of the insert 30 to relatively secure the insert 30 within the piston valve body 10. The valve body 20 can limit the insert 30 above the insert 30, so that the fixing reliability of the insert 30 in the piston valve body 10 can be ensured, and the structural reliability of the piston valve 100 can be further improved.

Further, the outer peripheral wall of the insert 30 is clearance fitted with the inner peripheral wall of the piston valve body 10. That is, the insert 30 and the piston valve body 10 do not have a tight fit, so that the difficulty in assembling the insert 30 can be reduced, the insert 30 can be smoothly placed into the piston valve body 10, and the insert 30 can be easily adjusted in the piston valve body 10.

Alternatively, the insert 30 is located at an end of the piston valve body 10 facing the compression chamber 210. That is, compared with the upper end of the piston valve body 10, the insert 30 is located at the lower end of the piston valve body 10, so that the space at the lower end can be reasonably utilized by the insert 30, and the insert 30 and the valve body 20 can be disposed in the piston valve body 10 and are in abutting fit in the piston valve body 10, so that the structural compactness of the piston valve 100 can be further improved.

According to one embodiment of the present utility model, as shown in fig. 2 to 4, the piston valve body 10 includes: the sleeve portion 11 and the boss 12, the boss 12 is provided at an end of the sleeve portion 11 facing the compression chamber 210, and the boss 12 extends radially inward, and a side surface of the insert 30 facing the compression chamber 210 abuts against the boss 12. The sleeve part 11 can play the role of sleeving the valve body 20 and the insert 30, the upper part of the sleeve part 11 can be fixedly connected with the valve body 20, the insert 30 can be accommodated at the lower end of the sleeve part 11, the boss 12 can extend a preset distance inwards in the radial direction, the boss 12 can play the role of abutting against the bottom surface of the insert 30, and thus the insert 30 can be clamped between the valve body 20 and the boss 12, and the reliability of the insert 30 in the sleeve part 11 can be ensured. The sleeve portion 11 and the boss 12 may be of an integrally formed structure.

Further, as shown in fig. 2 and 5, the insert 30 includes: the insert body 31 and the flange 32, the flange 32 is provided at the edge of the insert body 31, and the flange 32 extends toward the return chamber 220, the insert body 31 is provided with the first insert flow passage 33 and the second insert flow passage 34, and a side surface of the flange 32 facing the return chamber 220 is in abutting engagement with a side surface of the valve body 20 facing the compression chamber 210. That is, the surface of the flange 32 facing the restoring chamber 220 is the top surface of the flange 32, the surface of the valve body 20 facing the compressing chamber 210 is the bottom surface of the valve body 20, and the insert 30 can be in abutting engagement with the bottom edge of the valve body 20 through the flange 32, so that the contact area between the flange 32 and the bottom edge of the valve body 20 can be reduced, the function of the valve body 20 can be prevented from being affected, and the reliability of the engagement between the flange and the bottom edge of the valve body can be ensured. In addition, the insert 30 so disposed may also be reduced in weight to at least some extent.

Alternatively, as shown in fig. 2, an internal thread 111 is provided on the inner peripheral wall of the sleeve portion 11, and an external thread 21 is provided on the outer peripheral wall of the valve body 20, the internal thread 111 being engaged with the external thread 21. It will be appreciated that the engagement of the internal thread 111 and the external thread 21 ensures the reliability of the connection between the sleeve portion 11 and the valve body 20, while by providing the top surface of the flange 32 higher than the lower end of the internal thread 111, it is ensured that the bottom surface of the valve body 20 is effectively in abutting engagement with the top surface of the flange 32, so that the structural reliability of the piston valve 100 can be improved.

Also, as shown in fig. 2, the piston valve 100 further includes: the gum cover 40, the gum cover 40 is sleeved on the outer peripheral surface of the sleeve part 11, the inner peripheral wall of the gum cover 40 is provided with a bulge 41, the outer peripheral wall of the sleeve part 11 is provided with a groove 112, and the bulge 41 is matched in the groove 112. The rubber sleeve 40 can be in contact fit with the inner peripheral wall of the cylinder 200 at the outer side of the sleeve part 11, so that the sleeve part 11 can be prevented from being in direct contact with the cylinder 200, and the rubber sleeve 40 can effectively play a role in sealing and buffering. And by the engagement of the projection 41 and the groove 112, the engagement reliability of the gum cover 40 and the sleeve portion 11 can be improved. Wherein, the protrusion 41 and the groove 112 are a plurality of and all have annular shapes, so that the matching reliability of the rubber sleeve 40 and the sleeve part 11 can be further improved.

According to some embodiments of the present utility model, as shown in fig. 5 and 6, the first insert flow passage 33 includes a first through hole 331 and a first orifice 332.

The first through hole 331 penetrates the insert 30, the upper end of the first through hole 331 is communicated with the flow regulating valve 80, the bottom of the insert 30 is provided with a first flange 35, the first flange 35 surrounds the first through hole 331, a first orifice 332 is formed in the first flange 35, the cross-sectional area of the first through hole 331 is larger than that of the first orifice 332, and the lower end of the first through hole 331 is communicated with the compression chamber 210 through the first orifice 332. The bottom of the insert 30 is provided with a first elastic piece 50, and the first elastic piece 50 is abutted against the first convex edge 35 and covers the first perforation 331.

For example, the first through holes 331 may be a plurality of spaced apart along the circumferential direction of the insert 30, the first flange 35 may simultaneously surround the plurality of first through holes 331, and the first flange 35 may be provided with a plurality of first throttle holes 332, the plurality of first throttle holes 332 and the plurality of first through holes 331 communicating.

Thus, when the fluid flows from the flow rate adjusting valve 80 to the compression chamber 210, the fluid enters the first through hole 331, flows from the first orifice 332 to the compression chamber 210, until the thrust force of the fluid in the first through hole 331 pushes the first elastic sheet 50 to elastically deform, at this time, the fluid can flow directly to the compression chamber 210 through the first through hole 331, the flow rate of the fluid between the compression chamber 210 and the flow rate adjusting valve 80 increases, and the fluid can also flow simultaneously to the second through hole 341 through the second orifice 342, and then from the second through hole 341 to the flow rate adjusting valve 80.

According to some embodiments of the present utility model, as shown in fig. 2, the piston valve 100 further includes a support seat 60, the support seat 60 is mounted on a side of the insert 30 facing the compression chamber 210, the first elastic piece 50 is clamped between the support seat 60 and the insert 30, and an outer diameter of the support seat 60 is smaller than an outer diameter of the first elastic piece 50. Further, the piston valve 100 further includes: the fastener 62, the fastener 62 wears the insert 30, the first spring plate 50 and the support base 60. The fastener 62 may be a rivet, and the support seat 60 and the insert 30 may be riveted by the rivet, so that the installation reliability of the first elastic sheet 50 and the support seat 60 may be ensured.

In this way, the insert 30, the first elastic sheet 50 and the supporting seat 60 are fixed in relative positions, and when fluid flows from the first perforation 331 to the compression cavity 210, the pressure of the fluid can push the first elastic sheet 50 to deform, and since the outer diameter of the supporting seat 60 is smaller than that of the first elastic sheet 50, the supporting seat 60 avoids the first elastic sheet 50, and therefore the first elastic sheet 50 has sufficient deformation space, and can deform to open the first perforation 331.

Specifically, as shown in fig. 2, an annular avoidance groove 61 is provided at a position of the support seat 60, which is close to the edge, on a side surface of the compression chamber 210 to avoid the deformed first elastic sheet 50. That is, the top surface of the supporting seat 60 is not a complete plane, and the avoiding groove 61 is further provided near the edge, where the avoiding groove 61 may further function to avoid the first elastic sheet 50, so that sufficient deformation space may be reserved for the first elastic sheet 50, and the first through hole 331 may be deformed to open.

As shown in fig. 2, the first elastic sheet 50 is a plurality of elastic sheets stacked in order along the thickness direction thereof. Therefore, the plurality of first elastic pieces 50 need a larger force to deform integrally, so that the plurality of first elastic pieces 50 can support the fluid in the first perforation 331, and the plurality of first elastic pieces 50 are prevented from being deformed easily under the action of gravity of the fluid in the first perforation 331, so that the first elastic pieces 50 can be ensured to seal the first perforation 331 effectively.

According to some embodiments of the present utility model, as shown in fig. 5 and 6, the second insert flow passage 34 includes a second bore 341 and a second orifice 342.

The second perforation 341 penetrates the insert 30, the lower end of the second perforation 341 is communicated with the compression chamber 210, the top of the insert 30 is provided with a second convex edge 36, the second convex edge 36 surrounds the second perforation 341, a second orifice 342 is formed on the second convex edge 36, the cross-sectional area of the second perforation 341 is larger than that of the second orifice 342, and the upper end of the second perforation 341 is communicated with the flow regulating valve 80 through the second orifice 342. The surface of the insert 30, which is far away from the compression cavity 210, is provided with a second elastic piece 70, and the second elastic piece 70 abuts against the second flange 36 and covers the second perforation 341.

For example, the second through holes 341 may be a plurality of through holes arranged at intervals along the circumferential direction of the insert 30, and a minimum distance between the second through holes 341 and the central axis of the insert 30 is greater than a minimum distance between the first through holes 331 and the central axis of the insert 30, and a maximum distance between the second through holes 341 and the central axis of the insert 30 is greater than a maximum distance between the first through holes 331 and the central axis of the insert 30. The second flanges 36 are plural, and the second flanges 36 are correspondingly disposed around the second holes 341.

Thus, when the fluid flows from the compression chamber 210 to the flow rate adjusting valve 80, the fluid enters the second through hole 341, flows from the second orifice 342 to the flow rate adjusting valve 80, until the second elastic sheet 70 is elastically deformed by the thrust of the fluid in the second through hole 341, at this time, the fluid can flow directly to the flow rate adjusting valve 80 through the second through hole 341, the flow rate of the fluid between the compression chamber 210 and the flow rate adjusting valve 80 increases, and the fluid can also flow to the first through hole 331 through the first orifice 332 at the same time, and then flows from the first through hole 331 to the flow rate adjusting valve 80.

According to some embodiments of the present utility model, as shown in fig. 2, the piston valve 100 further includes a compression valve plate 90 and a regulator plate 110. The compression valve plate 90 is stopped at the bottom of the flow regulating valve 80, the regulating piece 110 is clamped between the compression valve plate 90 and the second elastic piece 70, and the inner diameter of the regulating piece 110 is larger than that of the second elastic piece 70.

That is, the two ends of the compression valve plate 90 respectively abut against the insert 30 and the adjusting plate 110, and the flow adjusting valve 80, the adjusting plate 110, the second elastic sheet 70 and the insert 30 can be tightly attached, that is, the second elastic sheet 70 and the second convex edge 36 are tightly attached, so that the second elastic sheet 70 is ensured to effectively seal the second perforation 341. When the fluid flows from the second through hole 341 to the flow rate adjusting valve 80, the pressure of the fluid can push the second elastic sheet 70 to deform, and the adjusting sheet 110 has a sufficient deformation space for the second elastic sheet 70 to deform so that the second through hole 341 is opened, because the inner diameter of the adjusting sheet 110 is larger than the inner diameter of the second elastic sheet 70, and the adjusting sheet 110 has avoided the second elastic sheet 70.

According to some embodiments of the present utility model, as shown in fig. 2 and 5, a positioning groove 37 is provided on a side of the insert 30 away from the compression chamber 210, and the second elastic piece 70, the adjusting piece 110, and the compression valve piece 90 are provided in the positioning groove 37. Through the setting of positioning groove 37, can fix the relative position of second shell fragment 70, regulating plate 110 and compression valve block 90 three, and realize the location between second shell fragment 70, regulating plate 110 and the compression valve block 90 three and the mold insert 30.

The shock absorber 1000 according to the embodiment of the present utility model includes a cylinder 200, a piston movably provided to the cylinder 200, and a flow rate adjusting valve 80 provided to the piston, and the flow rate adjusting valve is respectively communicated with a compression chamber 210 and a recovery chamber 220, the piston includes a piston rod and the piston valve 100 of the above embodiment, and the piston valve 100 is connected to the bottom of the piston rod. The shock absorber 1000 adopting the piston valve 100 of the above embodiment is reliable in structure, simple in assembly and high in assembly efficiency.

A vehicle according to an embodiment of the present utility model includes the shock absorber 1000 of the above embodiment.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features. In the description of the present utility model, "plurality" means two or more. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (19)

1. A piston valve for a shock absorber, comprising:

a piston valve body (10), wherein the piston valve body (10) is movably arranged in the outer cylinder of the shock absorber;

the insert (30) is fixedly matched with the piston valve body (10), the insert (30) is divided into a compression cavity and a recovery cavity in a cylinder body of the shock absorber, and a first insert flow channel (33) and a second insert flow channel (34) are arranged in the insert (30); when fluid flows from the recovery chamber to the compression chamber, the maximum flow rate of fluid in the first insert flow passage is greater than the maximum flow rate of fluid in the second insert flow passage; the maximum flow rate of fluid in the second insert flow passage is greater than the maximum flow rate of fluid in the first insert flow passage as fluid flows from the compression chamber to the recovery chamber.

2. Piston valve for shock absorbers according to claim 1, characterized in that the insert (30) is fixedly engaged with the inner side wall of the piston valve body (10).

3. Piston valve for a shock absorber according to claim 1, characterized in that the piston valve body (10) is connected to the outer peripheral wall of the valve body (20) of the shock absorber.

4. A piston valve for a shock absorber according to claim 3, wherein the bottom surface of the valve body (20) is in abutting engagement with the top surface of the insert (30) to relatively secure the insert (30) within the piston valve body (10).

5. The piston valve for a shock absorber according to claim 4, wherein an outer peripheral wall of the insert (30) is clearance fitted with an inner peripheral wall of the piston valve body (10).

6. Piston valve for a shock absorber according to claim 2 or 5, characterized in that the insert (30) is located at the end of the piston valve body (10) facing the compression chamber.

7. The piston valve for a shock absorber according to claim 1, wherein the piston valve body (10) comprises: the sleeve part (11) and boss (12), boss (12) set up in sleeve part (11) orientation the one end of compression chamber and radially inwards extend, the one side surface butt of mold insert (30) orientation the compression chamber is on boss (12).

8. The piston valve for a shock absorber according to claim 7, wherein the insert (30) comprises: insert main part (31) and flange (32), flange (32) set up in the edge of insert main part (31) and orientation the direction of restoring the chamber extends, insert main part (31) are provided with first insert runner (33) and second insert runner (34), the orientation of flange (32) one side surface towards restoring the chamber with the one side surface butt cooperation of valve body (20) towards the compression chamber.

9. The piston valve for a shock absorber according to claim 8, wherein an inner thread (111) is provided on an inner peripheral wall of the sleeve portion (11), an outer thread (21) is provided on an outer peripheral wall of the valve body (20), and the inner thread (111) is engaged with the outer thread (21).

10. The piston valve for a shock absorber of claim 7, further comprising: the rubber sleeve (40), the outer peripheral face of sleeve portion (11) is located to gum sleeve (40) cover, the inner peripheral wall of gum sleeve (40) is provided with protruding (41), the outer peripheral wall of sleeve portion (11) is provided with recess (112), protruding (41) cooperation is in recess (112).

11. The piston valve for a shock absorber according to claim 1, wherein the first insert flow passage (33) comprises:

-a first perforation (331), said first perforation (331) extending through said insert (30);

a first orifice (332), wherein a first convex edge (35) is arranged at the bottom of the insert (30), the first convex edge (35) surrounds the first perforation (331), the first orifice (332) is formed on the first convex edge (35), and the cross-sectional area of the first perforation (331) is larger than that of the first orifice (332);

the bottom of the insert (30) is further provided with a first elastic sheet (50), and the first elastic sheet (50) is abutted against the first convex edge (35) and covers the first perforation (331).

12. The piston valve for a shock absorber of claim 11, further comprising:

the support seat (60), the support seat (60) install in the side towards of mold insert (30) the compression chamber, first shell fragment (50) is held in between support seat (60) and mold insert (30), the outside diameter of support seat (60) is less than the outside diameter of first shell fragment (50).

13. The piston valve for a shock absorber of claim 12, further comprising: the fastener (62) is arranged in a penetrating mode through the insert (30), the first elastic sheet (50) and the supporting seat (60).

14. The piston valve according to claim 12, wherein an annular escape groove (61) is provided in a position of the support seat (60) close to an edge of a side surface of the compression chamber to escape the deformed first elastic piece (50).

15. The piston valve for a shock absorber according to claim 11, wherein the first elastic piece (50) is a plurality of pieces sequentially stacked in an up-down direction.

16. The piston valve for a shock absorber of claim 11 wherein the second insert flow passage (34) comprises:

-a second perforation (341), the second perforation (341) extending through the insert (30);

a second orifice (342), a second convex edge (36) is arranged at the top of the insert (30), the second convex edge (36) surrounds the second perforation (341), the second orifice (342) is formed on the second convex edge (36), and the cross-sectional area of the second perforation (341) is larger than that of the second orifice (342);

the surface of one side of the insert (30) far away from the compression cavity is provided with a second elastic sheet (70), and the second elastic sheet (70) is stopped against the second convex edge (36) and covers the second perforation (341).

17. The piston valve of claim 16, wherein a side of the insert (30) remote from the compression chamber is provided with a locating groove (37), and the second spring (70) is disposed within the locating groove (37).

18. A shock absorber, characterized by comprising a cylinder, a piston movably arranged in the cylinder, and a flow regulating valve arranged in the piston and communicating with the compression chamber and the recovery chamber, respectively, the piston comprising a piston rod and a piston valve (100) for a shock absorber according to any of claims 1-17.

19. A vehicle characterized by comprising a shock absorber (1000) according to claim 18.

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