Restoration valve assembly, shock absorber and vehicle

Abstract

The present invention provides a restoring valve assembly, a shock absorber and a vehicle, wherein the restoring valve assembly is used to be sleeved on a piston rod, and the restoring valve assembly includes a first limiter, a first valve plate group, a circulation valve body, a piston, a restoring valve body, a second valve plate group, a second limiter and a locking member which are arranged in sequence, the circulation valve body is provided with a first valve hole, the circulation valve body includes different specifications, and the piston is provided with a through hole; the restoring valve body is provided with a second valve hole, the restoration valve body includes different specifications, and the locking member is used to make the second limiter, the second valve plate group, the restoring valve body, the piston, the circulation valve body, the first valve plate group and the first limiter fit tightly and lock on the piston rod. In the development process of the shock absorber, if the flow of the current restoring valve assembly does not meet the requirements of matching and adjusting the shock absorber of the whole vehicle, it is only necessary to replace the specifications of the circulation valve body and the restoring valve body, thereby avoiding the problem that the consistency of multiple pistons may not be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorbers, and in particular to a restoring valve assembly and a shock absorber. Background Art

[0002] The flow rate of the flow valve of the traditional valve system recovery valve assembly is a fixed value. If the flow rate of the current recovery valve assembly flow valve does not match the requirements of the vehicle shock absorber, it is necessary to develop a piston with a different flow rate from the previous one (the piston is part of the recovery valve assembly) to adjust the flow rate of the recovery valve assembly flow valve. In the process of matching and adjusting with the vehicle shock absorber, it is necessary to continuously develop pistons with different flow rates until the matching and adjustment requirements of the vehicle shock absorber are met. In this way, developing multiple pistons not only increases the cost, but also the consistency of multiple pistons cannot be guaranteed. Summary of the invention

[0003] Based on this, the main purpose of the present invention is to provide a restoring valve assembly, a shock absorber and a vehicle that can obtain different flow valve flows without developing multiple pistons with different flow rates, so that there will be no consistency problems with the pistons.

[0004] To achieve the above object, the present invention provides a restoring valve assembly, which is used to be sleeved on a piston rod, and the restoring valve assembly includes: A first stopper; A first valve plate group, arranged on one side of the first limiting member; A circulation valve body is arranged on a side of the first valve plate group away from the first limiter, the circulation valve body is provided with a first valve hole, and the circulation valve body has different specifications, and the apertures of the first valve holes of the circulation valve bodies of different specifications are different; A piston is arranged on a side of the circulation valve body away from the first valve plate group, and the piston is provided with a through hole; A restoring valve body is arranged on a side of the piston away from the flow valve body, and is provided with a second valve hole. The restoring valve body includes different specifications, and the apertures of the second valve holes of the restoring valve bodies of different specifications are different; A second valve plate group is arranged on a side of the restoring valve body away from the piston; A second limiter is arranged on a side of the second valve plate group piston away from the restoring valve body; A locking member is arranged on a side of the second limiting member away from the second valve plate group, and the locking member is used to make the second limiting member, the second valve plate group, the restoration valve body, the piston, the flow valve body, the first valve plate group and the first limiting member tightly fit and lock on the piston rod.

[0005] Preferably, the diameter of the first valve hole is 1-2.5 mm, and the diameter of the second valve hole is 1-2.5 mm.

[0006] Preferably, the first valve plate group includes a plurality of first valve plates arranged in sequence, and along the direction of the circulation valve body pointing to the first limit member, the outer diameter of each of the plurality of first valve plates is not less than the outer diameter of the adjacent first valve plate; the second valve plate group includes a plurality of second valve plates arranged in sequence, and along the direction of the restoration valve body pointing to the second limit member, the outer diameter of each of the plurality of second valve plates is not less than the outer diameter of the adjacent second valve plate.

[0007] Preferably, the first valve plate group further includes a first throttle valve plate and a first fulcrum valve plate, a plurality of the first valve plates are located between the first throttle valve plate and the first fulcrum valve plate, the first throttle valve plate is located between the flow valve body and the plurality of the first valve plates, the outer diameter of the first throttle valve plate is the same as the outer diameter of the first valve plate with the largest outer diameter among the plurality of the first valve plates, and the outer diameter of the first fulcrum valve plate is smaller than the outer diameter of the first valve plate with the smallest outer diameter among the plurality of the first valve plates; The second valve plate group also includes a second throttle valve plate and a second fulcrum valve plate. Multiple second valve plates are located between the second throttle valve plate and the second fulcrum valve plate. The second throttle valve plate is located between the circulation valve body and the multiple second valve plates. The outer diameter of the second throttle valve plate is the same as the outer diameter of the second valve plate with the largest outer diameter among the multiple second valve plates. The outer diameter of the second fulcrum valve plate is smaller than the outer diameter of the second valve plate with the smallest outer diameter among the multiple second valve plates.

[0008] Preferably, the number of the first valve plates having the same outer diameter as the first throttle valve plate is more than two; the number of the second valve plates having the same outer diameter as the second throttle valve plate is more than two.

[0009] Preferably, the restoration valve assembly also includes a third valve plate group, which is arranged between the second valve plate group and the second limit member. The third valve plate group includes a plurality of third valve plates arranged in sequence, along the direction of the restoration valve body pointing to the second limit member, and the outer diameter of each of the plurality of third valve plates is not less than the outer diameter of an adjacent third valve plate.

[0010] Preferably, the outer diameter of the second valve sheet with the largest outer diameter in the second valve sheet group is greater than 22 mm, and the outer diameter of the third valve sheet with the largest outer diameter in the third valve sheet group is greater than 24 mm.

[0011] Preferably, a middle portion of a side of the circulation valve body facing the piston is concave inwardly in a direction away from the piston, and / or a middle portion of a side of the restoration valve body facing the piston is concave inwardly in a direction away from the piston.

[0012] To achieve the above object, the present invention further provides a shock absorber, comprising the above-mentioned restoring valve assembly.

[0013] To achieve the above object, the present invention also provides a vehicle, comprising the above shock absorber.

[0014] Advantages of the technical solution of the present invention: the restoration valve assembly includes a first limit piece, a first valve plate group, a circulation valve body, a piston, a restoration valve body, a second valve plate group, a second limit piece and a locking piece. Since the present application provides a circulation valve body and a restoration valve body, and the circulation valve body and the restoration valve body include different specifications, during the development of the shock absorber, if the flow of the current restoration valve assembly does not meet the requirements of matching and adjusting the shock absorber of the whole vehicle, it is only necessary to replace the specifications of the circulation valve body and the restoration valve body. The apertures of the first valve holes and the apertures of the second valve holes corresponding to the circulation valve bodies and restoration valve bodies of different specifications are different, so that the flow rates of the circulation valve bodies and restoration valve bodies of different specifications are different, until the required flow rate is obtained. In this way, the requirements of matching and adjusting the shock absorber of the whole vehicle can be met without replacing pistons of different flow rates, thereby avoiding the problem that the consistency of multiple pistons cannot be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the devices shown in these drawings without paying creative work.

[0016] Figure 1 is an exploded schematic diagram of a recovery valve assembly according to an embodiment; Figure 2 is an exploded side view of a recovery valve assembly according to an embodiment; Among them, 100, the first limit member; 200, the first valve plate group; 210, the first valve plate; 220, the first throttle valve plate; 230, the first fulcrum valve plate; 300, the circulation valve body; 310, the first valve hole; 400, the piston; 410, the through hole; 500, the recovery valve body; 510, the second valve hole; 600, the second valve plate group; 610, the second valve plate; 620, the second throttle valve plate; 630, the second fulcrum valve plate; 700, the second limit member; 800, the locking member; 900, the third valve plate group; 910, the third valve plate; 920, the third throttle valve plate; 930, the third fulcrum valve plate.

[0017] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes A technical solution, B technical solution, and A and B technical solutions that meet both requirements. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0020] The present application relates to the matching and adjustment of the shock absorber of the vehicle. The restoring valve assembly, the piston rod (not shown in the figure, the piston rod in the prior art may be referred to, and the function of the present application may be realized), the working cylinder, the oil cylinder and other structures cooperate to form the shock absorber to suppress the vibration of the vehicle during operation. Specifically, according to the different driving conditions of the vehicle and the road conditions, the restoring valve assembly can effectively suppress the vibration of the vehicle body by finely adjusting the damping force of the shock absorber, reduce the wear and fatigue damage of the vehicle parts caused by the vibration, and extend the service life of the vehicle. For example, when the vehicle is driving at high speed or passing through a rough road, the restoring valve assembly can increase the damping force, make the suspension system harder, and improve the stability and handling of the vehicle; when the vehicle is driving at a low speed or driving on a flat road, it can reduce the damping force, make the suspension system softer, and improve the ride comfort.

[0021] like Figure 1 and Figure 2As shown, a reset valve assembly is used to be sleeved on a piston rod, and the reset valve assembly includes a first limiter 100, a first valve plate group 200, a circulation valve body 300, a piston 400, a reset valve body 500, a second valve plate group 600, a second limiter 700 and a locking member 800. The first valve plate group 200 is arranged on one side of the first limiter 100, the circulation valve body 300 is arranged on the side of the first valve plate group 200 away from the first limiter 100, the circulation valve body 300 is provided with a first valve hole 310, the circulation valve body 300 includes different specifications, and the apertures of the first valve holes 310 of the circulation valve bodies 300 of different specifications are different, the piston 400 is arranged on the side of the circulation valve body 300 away from the first valve plate group 200, and the piston 400 is provided with a through hole 410; reset valve The body 500 is arranged on the side of the piston 400 away from the circulation valve body 300, and is provided with a second valve hole 510. The restoration valve body 500 includes different specifications, and the apertures of the second valve holes 510 of the restoration valve bodies 500 of different specifications are different; the second valve plate group 600 is arranged on the side of the restoration valve body 500 away from the piston 400, the second stopper 700 is arranged on the side of the second valve plate group 600 and the piston 400 away from the restoration valve body 500, and the locking member 800 is arranged on the side of the second stopper 700 away from the second valve plate group 600, and the locking member 800 is used to make the second stopper 700, the second valve plate group 600, the restoration valve body 500, the piston 400, the circulation valve body 300, the first valve plate group 200 and the first stopper 100 closely fit and lock on the piston rod. In this embodiment, the locking member 800 is a nut, and the piston rod is provided with a thread adapted to the nut.

[0022] The restoring valve assembly includes a first limiter 100, a first valve plate group 200, a circulation valve body 300, a piston 400, a restoration valve body 500, a second valve plate group 600, a second limiter 700 and a locking member 800. Since the present application provides a circulation valve body 300 and a restoration valve body 500, and the circulation valve body 300 and the restoration valve body 500 include different specifications, during the development of the shock absorber, if the flow of the current restoration valve assembly does not meet the requirements of the matching and adjustment of the shock absorber of the whole vehicle, it only needs to be replaced. The specifications of the circulation valve body 300 and the restoration valve body 500 are sufficient. The apertures of the first valve hole 310 and the apertures of the second valve hole 510 corresponding to the circulation valve bodies 300 and the restoration valve bodies 500 of different specifications are different, so that the flow rates of the circulation valve bodies 300 and the restoration valve bodies 500 of different specifications are different, until the required flow rate is obtained. In this way, the requirements of matching and adjusting the shock absorber of the whole vehicle can be met without replacing the pistons 400 of different flow rates, thereby avoiding the problem that the consistency of multiple pistons 400 may not be guaranteed.

[0023] Specifically, the first valve plate group 200 and the circulation valve body 300 constitute a circulation valve, and the restoration valve body 500 and the second valve plate group 600 constitute a restoration valve; the piston 400 is composed of two parts, one part is the piston base, and the other part is the piston rubber coating. The processing technology of the piston 400 is relatively complicated and the fluctuation amount is too large. Therefore, the consistency of the piston 400 is difficult to ensure, while the circulation valve body 300 and the restoration valve body 500 only have a powder base, and the processing technology is simple, so the consistency is easy to ensure.

[0024] In this embodiment, various structures of the reset valve assembly, such as the first stopper 100, the flow valve body 300, the piston 400, etc., are generally annular in shape, so as to be sleeved on the piston rod.

[0025] In the present embodiment, there are a plurality of first valve holes 310, and the plurality of first valve holes 310 are uniformly opened in the circulation valve body 300. Further, the plurality of first valve holes 310 are uniformly opened in the circulation valve body 300 in a circumferential arrangement. In some embodiments, the number of first valve holes 310 is 6, 8 or 10. It is understandable that in other embodiments, the number of first valve holes 310 can be any other number that can meet the matching and tuning requirements of the shock absorber; there are a plurality of second valve holes 510, and the plurality of second valve holes 510 are uniformly opened in the circulation valve body 300. Further, the plurality of second valve holes 510 are uniformly opened in the circulation valve body 300 in a circumferential arrangement. In some embodiments, the number of second valve holes 510 is 6, 8 or 10. It is understandable that in other embodiments, the number of second valve holes 510 can be any other number that can meet the matching and tuning requirements of the shock absorber. There are multiple through holes 410 on the piston 400, and the multiple through holes 410 are evenly opened on the piston 400. Further, the multiple through holes 410 are evenly opened on the piston 400 in a circular arrangement. In the present embodiment, the number of through holes 410 is three. It can be understood that in other embodiments, the number of through holes 410 may be more or less.

[0026] refer to Figure 1 , the aperture of the first valve hole 310 is 1-2.5mm, and the aperture of the second valve hole 510 is 1-2.5mm. Specifically, in practice, if the flow rate of the circulation valve body 300 needs to meet 16-35mm2, the circulation valve body 300 of the first valve hole 310 with different apertures is replaced until the required flow rate of the circulation valve body 300 is obtained; in practice, if the flow rate of the restoration valve body 500 needs to meet 12-35mm2, the restoration valve body 500 of the second valve hole 510 with different apertures is replaced until the required flow rate of the restoration valve body 500 is obtained.

[0027] refer to Figure 1The first valve disc group 200 includes a plurality of first valve discs 210 arranged in sequence, and the outer diameter of each first valve disc 210 among the plurality of first valve discs 210 is not less than the outer diameter of another first valve disc 210 adjacent to and away from the circulation valve body 300; specifically, the first valve disc group 200 is in a tower cone shape, for example: along the direction of the circulation valve body 300 pointing to the first limit member 100, the outer diameter of the first valve disc 210 does not increase, such as gradually decreasing. Of course, the outer diameters of two adjacent first valve discs 210 may also be the same, as long as the whole is in a tower cone shape.

[0028] refer to Figure 1 The first valve plate group 200 also includes a first throttle valve plate 220 and a first fulcrum valve plate 230. Multiple first valve plates 210 are located between the first throttle valve plate 220 and the first fulcrum valve plate 230. The first throttle valve plate 220 is located between the circulation valve body 300 and the multiple first valve plates 210. The outer diameter of the first throttle valve plate 220 is the same as the outer diameter of the first valve plate 210 with the largest outer diameter among the multiple first valve plates 210. The outer diameter of the first fulcrum valve plate 230 is smaller than the outer diameter of the first valve plate 210 with the smallest outer diameter among the multiple first valve plates 210. Among them, the first fulcrum valve plate 230 determines the stiffness of the first valve plate group 200. The larger the outer diameter of the first fulcrum valve plate 230, the smaller the stiffness and the finer the adjustable accuracy of the damping force.

[0029] refer to Figure 1 , the number of first valve discs 210 having the same outer diameter as the first throttle valve disc 220 is more than two; specifically, when there is only one first valve disc 210 having the same outer diameter as the first throttle valve disc 220, it is easy for the first valve disc 210 to be damaged when the oil passes through the circulation valve body 300 and impacts the first valve disc 210, causing the first valve disc 210 to be deformed. When the number of first valve discs 210 having the same outer diameter as the first throttle valve disc 220 is two or more, the service life of the first valve disc 210 can be extended.

[0030] refer to Figure 1 The second valve disc set 600 includes a plurality of second valve discs 610 arranged in sequence, and the outer diameter of each second valve disc 610 among the plurality of second valve discs 610 is not less than the outer diameter of another second valve disc 610 adjacent to and away from the restoring valve body 500. Specifically, the second valve disc set 600 is in a tower cone shape, for example: along the direction from the restoring valve body 500 to the second stopper 700, the outer diameter of the second valve disc 610 does not increase, such as gradually decreasing. Of course, the outer diameters of two adjacent second valve discs 610 may also be the same, as long as the whole is in a tower cone shape.

[0031] refer to Figure 1The second valve plate group 600 also includes a second throttle valve plate 620 and a second fulcrum valve plate 630. Multiple second valve plates 610 are located between the second throttle valve plate 620 and the second fulcrum valve plate 630. The second throttle valve plate 620 is located between the restoration valve body 500 and the multiple second valve plates 610. The outer diameter of the second throttle valve plate 620 is the same as the outer diameter of the second valve plate 610 with the largest outer diameter among the multiple second valve plates 610. The outer diameter of the second fulcrum valve plate 630 is smaller than the outer diameter of the second valve plate 610 with the smallest outer diameter among the multiple second valve plates 610. The second fulcrum valve plate 630 determines the stiffness of the second valve plate group 600. The larger the outer diameter of the second fulcrum valve plate 630, the smaller the stiffness and the finer the adjustable accuracy of the damping force.

[0032] refer to Figure 1 , the number of the second valve discs 610 having the same outer diameter as the second throttle valve disc 620 is more than two. Specifically, when there is only one second valve disc 610 having the same outer diameter as the second throttle valve disc 620, it is easy for the second valve disc 610 to be damaged when the oil passes through the circulation valve body 300 and impacts the second valve disc 610, causing the second valve disc 610 to deform. When the number of the second valve discs 610 having the same outer diameter as the second throttle valve disc 620 is two or more, the service life of the second valve disc 610 can be extended.

[0033] refer to Figure 1 The reset valve assembly further includes a third valve disc group 900, which is disposed between the second valve disc group 600 and the second stopper 700. The third valve disc group 900 includes a plurality of third valve discs 910 disposed in sequence, and the outer diameter of each third valve disc 910 among the plurality of third valve discs 910 is not less than the outer diameter of another third valve disc 910 adjacent to and away from the reset valve body 500. Specifically, the third valve disc group 900 is in a tower cone shape, for example: along the direction from the reset valve body 500 to the second stopper 700, the outer diameter of the third valve disc 910 does not increase, such as gradually decreasing. Of course, the outer diameters of two adjacent third valve discs 910 may also be the same, as long as the whole is in a tower cone shape.

[0034] Specifically, when the restoration valve assembly includes the third valve plate group 900, the locking member 800 is used to make the second stopper 700, the third valve plate group 900, the second valve plate group 600, the restoration valve body 500, the piston 400, the flow valve body 300, the first valve plate group 200 and the first stopper 100 closely fit and lock on the piston rod. At this time, the restoration valve body 500, the second valve plate group 600 and the third valve plate group 900 constitute the restoration valve.

[0035] refer to Figure 1The third valve plate group 900 also includes a third throttle valve plate 920 and a third fulcrum valve plate 930. Multiple third valve plates 910 are located between the third throttle valve plate 920 and the third fulcrum valve plate 930. The third throttle valve plate 920 is located between the second valve plate group 600 and the multiple third valve plates 910. The outer diameter of the third throttle valve plate 920 is the same as the outer diameter of the third valve plate 910 with the largest outer diameter among the multiple third valve plates 910. The outer diameter of the third fulcrum valve plate 930 is smaller than the outer diameter of the third valve plate 910 with the smallest outer diameter among the multiple third valve plates 910. Among them, the third fulcrum valve plate 930 determines the stiffness of the third valve plate group 900. The larger the outer diameter of the third fulcrum valve plate 930, the smaller the stiffness and the finer the adjustable accuracy of the damping force.

[0036] refer to Figure 1 , the number of the third valve discs 910 having the same outer diameter as the third throttle valve disc 920 is more than two. Specifically, when there is only one third valve disc 910 having the same outer diameter as the third throttle valve disc 920, it is easy for the third valve disc 910 to be damaged when the oil passes through the circulation valve body 300 and impacts the third valve disc 910, causing the third valve disc 910 to deform. When the number of the third valve discs 910 having the same outer diameter as the third throttle valve disc 920 is two or more, the service life of the third valve disc 910 can be extended.

[0037] refer to Figure 1 , the outer diameter of the second valve disc 610 with the largest outer diameter in the second valve disc group 600 is greater than 22 mm, and the outer diameter of the third valve disc 910 with the largest outer diameter in the third valve disc group 900 is greater than 24 mm. Specifically, the outer diameter of the valve disc with the largest outer diameter in the valve disc group in the prior art is less than 18 mm, and the outer diameters of the second valve disc 610 and the third valve disc 910 of the present application are larger. The larger the outer diameter, the smaller the stiffness and the smaller the damping force, so that the adjustment gradient of the damping force of the second valve disc group 600 and the third valve disc group 900 of the present application is finer.

[0038] Specifically, if only the second valve plate group 600 of the present application is considered, the damping force generated is smaller than the damping force generated in the prior art, but the damping force generated by the second valve plate group 600 and the third valve plate group 900 of the present application together is greater than the damping force generated in the prior art, thereby expanding the adjustable gradient of the compression damping force.

[0039] The number of the first valve disc 210, the second valve disc 610 and the third valve disc 910 is less than 14, preferably less than 10. The thickness of the first valve disc 210, the second valve disc 610 and the third valve disc 910 is 0.1-0.4, and more preferably, the thickness of the first valve disc 210, the second valve disc 610 and the third valve disc 910 is 0.15-0.25. In practical applications, the first valve disc 210, the second valve disc 610 and the third valve disc 910 with larger thickness can be selected. After the thickness is increased, the number of the first valve disc 210, the second valve disc 610 and the third valve disc 910 used can be reduced, so that the tightness of the contact and fit between the components can be better controlled. In this embodiment, the first valve disc 210, the second valve disc 610 and the third valve disc 910 with the same outer diameter adopt the same thickness.

[0040] refer to Figure 1 The middle part of the circulation valve body 300 on the side facing the piston 400 is concave inward in the direction away from the piston 400, so that the circulation valve body 300 is low in the middle and high on both sides. When the various structures are locked on the piston rod by the locking piece 800, the circulation valve body 300 is slightly deformed by the force, so that the circulation valve body 300 and the piston 400 fit more tightly, avoiding the risk of oil leakage.

[0041] refer to Figure 1 The middle part of the side of the restoring valve body 500 facing the piston 400 is concave inward in the direction away from the piston 400, so that the restoring valve body 500 is low in the middle and high on both sides. When the various structures are locked on the piston rod by the locking piece 800, the restoring valve body 500 is slightly deformed by the force, so that the restoring valve body 500 and the piston 400 fit more tightly, avoiding the risk of oil leakage.

[0042] A shock absorber comprises the above-mentioned restoring valve assembly.

[0043] A vehicle comprises the above-mentioned shock absorber.

[0044] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent device transformations made using the contents of the present invention's specification and drawings, or direct / indirect applications in other related technical fields, under the inventive concept of the present invention are included in the patent protection scope of the present invention.

Claims

1. A recovery valve assembly, used for being sleeved on a piston rod, the recovery valve assembly comprising: A first stopper; A first valve plate group, arranged on one side of the first limiting member; A circulation valve body is arranged on a side of the first valve plate group away from the first limiter, the circulation valve body is provided with a first valve hole, and the circulation valve body has different specifications, and the apertures of the first valve holes of the circulation valve bodies of different specifications are different; A piston is arranged on a side of the circulation valve body away from the first valve plate group, and the piston is provided with a through hole; A restoring valve body is arranged on a side of the piston away from the flow valve body, and is provided with a second valve hole. The restoring valve body includes different specifications, and the apertures of the second valve holes of the restoring valve bodies of different specifications are different; A second valve plate group is arranged on a side of the restoring valve body away from the piston; A second limiter is arranged on a side of the second valve plate group piston away from the restoring valve body; A locking member is arranged on a side of the second limiting member away from the second valve plate group, and the locking member is used to make the second limiting member, the second valve plate group, the restoration valve body, the piston, the flow valve body, the first valve plate group and the first limiting member tightly fit and lock on the piston rod.

2. The recovery valve assembly according to claim 1, characterized in that: The diameter of the first valve hole is 1-2.5 mm, and the diameter of the second valve hole is 1-2.5 mm.

3. The recovery valve assembly according to claim 1, characterized in that: The first valve plate group includes a plurality of first valve plates arranged in sequence, along the direction of the flow valve body pointing to the first limit member, and the outer diameter of each of the plurality of first valve plates is not less than the outer diameter of an adjacent first valve plate; the second valve plate group includes a plurality of second valve plates arranged in sequence, along the direction of the restoration valve body pointing to the second limit member, and the outer diameter of each of the plurality of second valve plates is not less than the outer diameter of an adjacent second valve plate.

4. The recovery valve assembly according to claim 3, characterized in that: The first valve plate group further includes a first throttle valve plate and a first fulcrum valve plate, a plurality of the first valve plates are located between the first throttle valve plate and the first fulcrum valve plate, the first throttle valve plate is located between the flow valve body and the plurality of the first valve plates, the outer diameter of the first throttle valve plate is the same as the outer diameter of the first valve plate with the largest outer diameter among the plurality of the first valve plates, and the outer diameter of the first fulcrum valve plate is smaller than the outer diameter of the first valve plate with the smallest outer diameter among the plurality of the first valve plates; The second valve plate group also includes a second throttle valve plate and a second fulcrum valve plate. Multiple second valve plates are located between the second throttle valve plate and the second fulcrum valve plate. The second throttle valve plate is located between the circulation valve body and the multiple second valve plates. The outer diameter of the second throttle valve plate is the same as the outer diameter of the second valve plate with the largest outer diameter among the multiple second valve plates. The outer diameter of the second fulcrum valve plate is smaller than the outer diameter of the second valve plate with the smallest outer diameter among the multiple second valve plates.

5. The recovery valve assembly according to claim 4, characterized in that: The number of the first valve pieces having the same outer diameter as the first throttle valve piece is more than two; the number of the second valve pieces having the same outer diameter as the second throttle valve piece is more than two.

6. The recovery valve assembly according to claim 3, characterized in that: The restoration valve assembly also includes a third valve plate group, which is arranged between the second valve plate group and the second limit member. The third valve plate group includes a plurality of third valve plates arranged in sequence, along the direction of the restoration valve body pointing to the second limit member, and the outer diameter of each of the plurality of third valve plates is not less than the outer diameter of an adjacent third valve plate.

7. The recovery valve assembly according to claim 6, characterized in that: The outer diameter of the second valve sheet with the largest outer diameter in the second valve sheet group is greater than 22 mm, and the outer diameter of the third valve sheet with the largest outer diameter in the third valve sheet group is greater than 24 mm.

8. The recovery valve assembly according to claim 1, characterized in that: A middle portion of a side of the circulation valve body facing the piston is concave inwardly in a direction away from the piston, and / or a middle portion of a side of the restoration valve body facing the piston is concave inwardly in a direction away from the piston.

9. A shock absorber, characterized in that: It comprises a recovery valve assembly as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the vibration damper as claimed in claim 9.

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