Shock absorber

Abstract

The utility model provides a shock absorber which comprises a first cylinder body, a second cylinder body and a damping valve assembly, and the first cylinder body comprises a first opening; the second cylinder body comprises a second opening; the damping valve assembly comprises a liquid inlet end and a liquid outlet end, the liquid inlet end is communicated with the first opening, the liquid outlet end is communicated with the second opening, the shock absorber further comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with the side wall of the first opening and protrudes out of the side wall of the first cylinder body, and the second connecting piece is detachably connected with the first connecting piece. The second connecting piece is connected with the liquid inlet end in a sealed mode so that the liquid inlet end can be communicated with the first opening, a first distance exists between the end face, close to the second cylinder body, of the first connecting piece and the first central axis of the first cylinder body, and a second distance exists between the inner surface, close to the first cylinder body, of the side wall of the second cylinder body and the second central axis of the second cylinder body. The first distance is smaller than the second distance, and the first cylinder body in the shock absorber is simple in structure and easy to install.

Description

Technical Field

[0001] At least one embodiment of the utility model relates to a vibration damper. Background Art

[0002] In the automobile suspension system, for hydraulic cylinder shock absorbers, when the frame and the axle move relative to each other due to vibration, the piston rod will move up and down in the shock absorber, causing the damping fluid in the shock absorber cavity to circulate repeatedly between different chambers, so that the kinetic energy generated by the relative movement between the shock absorber piston rod assembly and the shock absorber cylinder assembly can be converted into heat energy of the damping fluid and dissipated outward, thus playing a damping role. While the shock absorber effectively alleviates the vibration of the frame and body and improves the smoothness of the car's driving, the reliability of its own structure and assembly is crucial. Utility Model Content

[0003] At least one embodiment of the utility model provides a shock absorber. The shock absorber makes the first distance between the first connecting member and the first central axis smaller than the second distance between the inner surface of the side wall of the second cylinder body close to the first cylinder body and the second central axis, the first connecting member and the second connecting member are detachably connected, and the second connecting member is matched with the liquid inlet end of the damping valve assembly, so that the installation space required for the intermediate cylinder during installation can be reduced, for example, the inner diameter of the second cylinder body matched therewith can be reduced, which is conducive to the miniaturization design of the shock absorber, and at the same time, it can also reduce the risk of collision and scratching between the first connecting member and the inner wall of the second cylinder body, so that the assembly difficulty of the intermediate cylinder is reduced.

[0004] At least one embodiment of the utility model provides a shock absorber, comprising a first cylinder body, a second cylinder body and a damping valve assembly, wherein the first cylinder body is cylindrical and comprises a first opening located on a side wall of the first cylinder body and penetrating the side wall; the second cylinder body is cylindrical and is sleeved on the outside of the first cylinder body, and forms a first cavity located between the first cylinder body and the second cylinder body with the first cylinder body, the second cylinder body comprises a second opening located on the side wall of the second cylinder body and penetrating the side wall; the damping valve assembly comprises a liquid inlet end and a liquid outlet end, the liquid inlet end is connected to the first opening, the liquid outlet end is connected to the second opening, and the damping valve assembly is configured to regulate the flow of fluid from the first cylinder body to the second cylinder body. The resistance of liquid flowing from the first opening to the second opening, wherein the shock absorber further comprises a first connecting member and a second connecting member, the first connecting member is fixedly connected to the side wall of the first opening and protrudes from the side wall of the first cylinder body, the second connecting member is detachably connected to the first connecting member, the second connecting member is sealedly connected to the liquid inlet end to connect the liquid inlet end with the first opening, a first distance is formed between the end surface of the first connecting member close to the second cylinder body and the first central axis of the first cylinder body, a second distance is formed between the side wall of the second cylinder body close to the inner surface of the first cylinder body and the second central axis of the second cylinder body, and the first distance is smaller than the second distance.

[0005] For example, in the shock absorber provided according to at least one embodiment of the present invention, at least a portion of the second connecting member is located in the first cavity, and a size of the second connecting member is smaller than a size of the second opening, so that the second connecting member is detachably connected to the first connecting member through the second opening.

[0006] For example, according to the shock absorber provided by at least one embodiment of the present invention, the orthographic projection of the first opening on the side wall of the second cylinder body is located within the second opening, and the orthographic projection of the second connecting member on the side wall of the second cylinder body is located within the second opening.

[0007] For example, in the shock absorber provided by at least one embodiment of the present invention, the damping valve assembly further includes a valve housing, which is located on a side of the second cylinder body away from the first cylinder body and fixedly connected to a side wall of the second cylinder body.

[0008] For example, in the shock absorber provided according to at least one embodiment of the present invention, the first connecting member includes a first channel and an inner wall surrounding the first channel, and the second connecting member includes: a sealing connection part, including a second channel, an inner wall surrounding the second channel and an outer wall away from the second channel, wherein the inner wall of the sealing connection part is sealingly connected to the liquid inlet end, and the outer wall of the sealing connection part is detachably connected to the inner wall of the first connecting member.

[0009] For example, according to the shock absorber provided by at least one embodiment of the present invention, the shock absorber also includes a seal, wherein a sealing groove is provided on the inner wall of the sealing connection part or the outer wall of the liquid inlet end, and the seal is located in the sealing groove.

[0010] For example, in the shock absorber provided according to at least one embodiment of the present utility model, the second channel of the second connecting member includes a first sub-channel and a second sub-channel connected to each other, the first sub-channel is closer to the damping valve assembly than the second sub-channel, the sealing connection portion also includes a first supporting portion and a sealing portion, the sealing portion surrounds the first sub-channel, the first supporting portion surrounds the second sub-channel, the size of the first supporting portion in the extension direction of the first center axis is larger than the size of the sealing portion in the extension direction of the first center axis, so that the size of the second sub-channel is smaller than the size of the first sub-channel, and the liquid inlet end is located in the first sub-channel and is spaced apart from the first supporting portion.

[0011] For example, in the shock absorber provided according to at least one embodiment of the present invention, the second connecting member also includes a second supporting portion, which is connected to the sealing connecting portion and extends in a direction away from the third center axis of the second channel, and the second supporting portion is located on a side of the first connecting member close to the damping valve assembly and abuts against an end face of the first connecting member close to the second cylinder body.

[0012] For example, in the shock absorber provided by at least one embodiment of the present utility model, the surface of the second supporting portion away from the first connecting member is located on a side of the second cylinder body away from the first cylinder body.

[0013] For example, in the shock absorber provided by at least one embodiment of the present invention, the orthographic projection of the inner side wall of the sealing part on the reference plane perpendicular to the third center axis is circular, the orthographic projection of the inner side wall of the first support part on the reference plane is circular, and the orthographic projection of the outer side wall of the second support part on the reference plane is polygonal.

[0014] For example, in the shock absorber provided by at least one embodiment of the present invention, the orthographic projection of the inner side wall of the sealing part on the reference plane perpendicular to the third center axis is circular, the orthographic projection of the inner side wall of the first support part on the reference plane is polygonal, and the orthographic projection of the outer side wall of the second support part on the reference plane is circular.

[0015] For example, in the shock absorber provided by at least one embodiment of the present invention, the orthographic projection of the inner side wall of the sealing part on the reference plane perpendicular to the third center axis is circular, the orthographic projection of the inner side wall of the first support part on the reference plane is circular, the orthographic projection of the outer side wall of the second support part on the reference plane is circular, and the surface of the second connecting member away from the first center axis has a plurality of recessed areas, and each of the recessed areas is spaced apart from the second channel.

[0016] For example, in the shock absorber provided by at least one embodiment of the present utility model, outer edges of a surface of the second support portion facing the damping valve assembly and a surface of the second support portion facing the first central axis respectively have chamfers.

[0017] For example, in the shock absorber provided by at least one embodiment of the present utility model, the first connecting member and the side wall of the first cylinder body are an integrated structure.

[0018] For example, in the shock absorber provided by at least one embodiment of the present utility model, the first connecting member is threadedly connected to the second connecting member.

[0019] For example, in the shock absorber provided by at least one embodiment of the present invention, there is a third distance between the outer surface of the first cylinder body and the inner surface of the second cylinder body, and the difference between the first distance and the second distance is 1 / 4 to 1 / 2 of the third distance.

[0020] For example, according to the shock absorber provided by at least one embodiment of the present utility model, the shock absorber also includes a third cylinder body located within the first cylinder body, wherein the third cylinder body and the first cylinder body form a second cavity located between the third cylinder body and the first cylinder body, and the third cylinder body includes a third opening located on the side wall of the third cylinder body and penetrating the third cylinder body, and the third opening is communicated with the second cavity.

[0021] At least one embodiment of the utility model further provides a method for installing a shock absorber, wherein the shock absorber includes a first cylinder body, a second cylinder body, a damping valve assembly, a first connecting member, and a second connecting member, the first cylinder body is cylindrical and includes a first opening located on a side wall of the first cylinder body and penetrating the side wall, the second cylinder body is cylindrical and includes a second opening located on a side wall of the second cylinder body and penetrating the side wall, the damping valve assembly includes a liquid inlet end and a liquid outlet end, and the installation method includes: fixing the first connecting member to the side wall of the first opening, and making the first connecting member protrude from the side wall of the first cylinder body; extending the first cylinder body together with the first connecting member into the second cylinder body to form a first connecting member between the first cylinder body and the second cylinder body. a first cavity between the two cylinder bodies; the second connecting member is detachably connected to the first connecting member; the damping valve assembly is fixedly connected to the side wall of the second cylinder body, and the second connecting member and the liquid inlet end are sealed to connect the liquid inlet end with the first opening, and the liquid outlet end with the second opening, so that the damping valve assembly can adjust the resistance of the fluid flowing from the first opening to the second opening, wherein a first distance is formed between the end surface of the first connecting member close to the second cylinder body and the first center axis of the first cylinder body, a second distance is formed between the side wall of the second cylinder body close to the inner surface of the first cylinder body and the second center axis of the second cylinder body, and the first distance is smaller than the second distance.

[0022] For example, according to at least one embodiment of the utility model, a method for installing a shock absorber is provided, wherein the second connecting member includes a sealing connection portion, the shock absorber also includes a sealing member, and a sealing groove is provided on the inner side wall of the sealing connection portion or the outer side wall of the liquid inlet end. Before the damping valve assembly is fixedly connected to the side wall of the second cylinder body, the installation method also includes: setting the sealing member in the sealing groove so that the inner side wall of the sealing connection portion is sealed and connected to the liquid inlet end. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0024] Figure 1 The present invention is a schematic diagram of the overall structure of a shock absorber provided by at least one embodiment of the present invention.

[0025] Figure 2 for Figure 1 A schematic diagram of the partial structure of the shock absorber is shown.

[0026] Figure 3for Figure 1 A front perspective view of a second connecting member in the shock absorber is shown.

[0027] Figure 4 for Figure 1 A top view of the second connecting element in the vibration damper is shown.

[0028] Figure 5 A top view of another second connecting member provided in at least one embodiment of the present utility model.

[0029] Figure 6 A flowchart of an installation method provided for at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The words "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0032] Usually, the shock absorber includes an oil storage cylinder, an intermediate cylinder and a working cylinder. The intermediate cylinder is sleeved on the outside of the working cylinder, and the oil storage cylinder is sleeved on the outside of the intermediate cylinder. The shock absorber also includes a damping valve assembly. The liquid inlet end of the damping valve assembly is connected to the cavity between the intermediate cylinder and the working cylinder, and the valve housing of the damping valve assembly is fixedly connected to the outer wall of the oil storage cylinder. The damping valve assembly includes an electromagnetic coil, an electromagnetic core, a rod body and a movable valve connected to the rod body. The electromagnetic coil can drive the rod body to drive the electromagnetic core to reciprocate in the cavity of the damping valve assembly, and affect the circulation state of the damping fluid by controlling the opening degree of the movable valve, thereby changing the damping pressure.

[0033] During the research, the inventor of the utility model found that: generally, the side wall of the middle cylinder of the shock absorber includes an opening, and a connection structure arranged around the opening in the circumferential direction. For example, the connection structure protrudes relative to the main body of the side wall, and is configured to cooperate with the liquid inlet end of the damping valve assembly. For example, the liquid inlet end of the damping valve assembly can be extended into the connection structure, and then can be communicated with the opening of the middle cylinder. However, in order to ensure the installation stability of the damping valve assembly, the connection structure is usually large in size, which makes the maximum radial size of the middle cylinder large. During the assembly process of the shock absorber, the middle cylinder needs to be sleeved in the oil storage barrel, so the connection structure of the middle cylinder is likely to scratch the inner wall of the oil storage barrel, damage the structure of the oil storage barrel, and even damage the connection structure itself, resulting in the inability to install the damping valve assembly normally; in addition, since the connection structure protrudes radially relative to the main body of the middle cylinder, the installation space required for the middle cylinder during installation is large, and accordingly, the inner diameter of the oil storage barrel needs to be large enough to allow the middle cylinder to extend into it and meet the installation requirements. Therefore, the intermediate cylinder with the above structure has a high installation risk and is not conducive to the miniaturization design of the shock absorber.

[0034] At least one embodiment of the utility model provides a vibration damper.

[0035] At least one embodiment of the utility model provides a shock absorber, including a first cylinder body, a second cylinder body and a damping valve assembly, the first cylinder body is cylindrical and includes a first opening located on the side wall of the first cylinder body and penetrating the side wall; the second cylinder body is cylindrical and is sleeved on the outside of the first cylinder body, and forms a first cavity located between the first cylinder body and the second cylinder body with the first cylinder body, the second cylinder body includes a second opening located on the side wall of the second cylinder body and penetrating the side wall; the damping valve assembly includes a liquid inlet end and a liquid outlet end, the liquid inlet end is connected to the first opening, the liquid outlet end is connected to the second opening, and the damping valve assembly is configured as The resistance of the fluid flowing from the first opening to the second opening is adjusted. The shock absorber also includes a first connecting member and a second connecting member. The first connecting member is fixedly connected to the side wall of the first opening and protrudes from the side wall of the first cylinder body. The second connecting member is detachably connected to the first connecting member. The second connecting member is sealed and connected to the liquid inlet end to connect the liquid inlet end with the first opening. There is a first distance between the end surface of the first connecting member close to the second cylinder body and the first center axis of the first cylinder body. There is a second distance between the inner surface of the side wall of the second cylinder body close to the first cylinder body and the second center axis of the second cylinder body. The first distance is smaller than the second distance.

[0036] The shock absorber provided by at least one embodiment of the utility model makes the first distance between the first connecting member and the first center axis smaller than the second distance between the inner surface of the side wall of the second cylinder body close to the first cylinder body and the second center axis. The first connecting member and the second connecting member are detachably connected, and the second connecting member is matched with the liquid inlet end of the damping valve assembly. Therefore, the installation space required for the intermediate cylinder during installation can be reduced. For example, the inner diameter of the second cylinder body matched with it can be reduced, which is beneficial to the miniaturized design of the shock absorber. At the same time, it can also reduce the risks of collision and scratch between the first connecting member and the inner wall of the second cylinder body, thereby reducing the difficulty of assembling the intermediate cylinder.

[0037] The shock absorber provided by the embodiment of the utility model is described below with reference to the accompanying drawings.

[0038] Figure 1 A schematic diagram of the overall structure of a shock absorber provided by at least one embodiment of the utility model; Figure 2 for Figure 1 A schematic diagram of a partial structure of a shock absorber shown; Figure 3 for Figure 1 A front perspective view of the second connecting member in the shock absorber shown; Figure 4 for Figure 1 A top view of the second connecting member in the shock absorber shown; Figure 5 A top view of a second connecting member provided in at least one embodiment of the present utility model.

[0039] like Figure 1 As shown, the shock absorber 01 includes: a first cylinder 100, a second cylinder 200 and a damping valve assembly 300. The first cylinder 100 and the second cylinder 200 are cylindrical, and the second cylinder 200 is sleeved on the outside of the first cylinder 100, so that there is a first cavity 150 between the first cylinder 100 and the second cylinder 200. For example, the shock absorber 01 may also include other cylinders (for example, working cylinders) located inside the first cylinder 100, so that the first cylinder 100 serves as an intermediate cylinder. For example, the second cylinder 200 may be an oil storage cylinder.

[0040] like Figure 1 As shown, the first cylinder 100 includes a first opening 101 located on the side wall 110 of the first cylinder 100 and penetrating the side wall 110, and the first opening 101 allows fluid (e.g., damping fluid) to flow inside and outside the side wall 110 of the first cylinder 100. The second cylinder 200 includes a second opening 201 located on the side wall 210 of the second cylinder 200 and penetrating the side wall 210, and the second opening 201 allows fluid to flow inside and outside the side wall 110 of the second cylinder 200.

[0041] like Figure 1As shown, the damping valve assembly 300 includes a liquid inlet end 310 and a liquid outlet end 320. The liquid inlet end 310 is connected to the first opening 101, and the liquid outlet end 320 is connected to the second opening 201. The damping valve assembly 300 is configured to adjust the resistance of the fluid flowing from the first opening 101 to the second opening 201. For example, the opening area of ​​the second opening 201 is larger than the opening area of ​​the first opening 101. The liquid inlet end 310 of the damping valve assembly 300 passes through the second opening 201 and is located near the first opening 101. For example, the liquid inlet end 310 is connected to the first opening 101 through its liquid inlet. For example, the liquid outlet end 320 of the damping valve assembly 300 is located outside the liquid inlet end 310, and the liquid outlet end 320 is connected to the second opening 201 through its liquid outlet, and then connected to the first cavity 150. For example, the damping valve assembly 300 further includes an electromagnetic core 330, a rod 340, and a movable valve 350. The rod 340 penetrates the electromagnetic core 330 along the axial direction of the damping valve assembly 300 and is connected to the electromagnetic core 330. The rod 340 is configured to transmit the regulating force on the electromagnetic core 330 to the movable valve 350. For example, the rod 340 can drive the movable valve 350 to reciprocate, thereby changing the opening state of the movable valve 350 to control the flow of the damping fluid.

[0042] like Figure 1 As shown, the shock absorber 01 also includes a first connecting member 120 and a second connecting member 130, and the first connecting member 120 is fixedly connected to the side wall of the first opening 101 and protrudes from the side wall 110 of the first cylinder body 100. For example, the first connecting member 120 can be welded, clamped, etc. with the side wall of the first opening 101, but is not limited thereto. For example, the second connecting member 130 is detachably connected to the first connecting member 120, and the second connecting member 130 is sealedly connected to the liquid inlet end 310 to connect the liquid inlet end 310 with the first opening 101. For example, the second connecting member 130 and the first connecting member 120 can be mutually clamped or threaded, but is not limited thereto. For example, a part of the liquid inlet end 310 extends into the second connecting member 130, and the outer wall of the liquid inlet end 310 and the inner wall of the second connecting member 130 are sealed to each other.

[0043] like Figure 1As shown, there is a first distance L1 between the end face 121 of the first connecting member 120 close to the second cylinder body 200 and the first central axis M1 of the first cylinder body 100, and there is a second distance L2 between the inner surface of the side wall 210 of the second cylinder body 200 close to the first cylinder body 100 and the second central axis M2 of the second cylinder body 200, and the first distance L1 is smaller than the second distance L2. For example, the first central axis M1 of the first cylinder body 100 coincides with the second central axis M2 of the second cylinder body 200, and the end face 121 of the first connecting member 120 close to the second cylinder body 200 is located in the first cavity 150, and does not exceed the second opening 201 in the radial direction of the second cylinder body 200. For example, the second distance L2 between the side wall 210 of the second cylinder body 200 close to the inner surface of the first cylinder body 100 and the second central axis M2 is the inner diameter of the second cylinder body 200.

[0044] Since the first distance L1 is relatively small and smaller than the inner diameter of the second cylinder 200, the first connecting member 120 has enough space to extend into the second cylinder 200 after being connected to the first cylinder 100, which is beneficial to reducing the inner diameter of the second cylinder 200 and facilitating the miniaturized design of the shock absorber. At the same time, the risk of interference between the first connecting member 120 and the inner wall of the second cylinder 200 can be reduced, so as to reduce the scratching or damage of the inner wall of the second cylinder 200 by the first connecting member 120, thereby reducing the installation risk and reducing the difficulty of assembling the first cylinder 100.

[0045] For example, Figure 1 As shown, there is a third distance L3 between the outer surface of the first cylinder body 100 and the inner surface of the second cylinder body 200, and the difference between the first distance L1 and the second distance L2 is 1 / 4 to 1 / 2 of the third distance L3. For example, the difference between the first distance L1 and the second distance L2 is the distance between the end surface 121 of the first connecting member 120 and the inner surface of the second cylinder body 200. By making the distance 1 / 4 to 1 / 2 of the third distance L3, such as 1 / 4, 1 / 3 or 1 / 2, it is beneficial to reserve installation space for the first cylinder body 100 together with the first connecting member 120, thereby reducing installation risks and facilitating the miniaturization design of the second cylinder body 200.

[0046] For example, Figure 2 As shown, the first connecting member 120 and the side wall 110 of the first cylinder body 100 are an integrated structure. For example, the material of the first connecting member 120 is the same as that of the first cylinder body 100, and is manufactured by the same process. This is conducive to simplifying the manufacturing process and reducing the difficulty of assembly.

[0047] For example, Figure 2As shown, the orthographic projection of the first opening 101 on the side wall 210 of the second cylinder 200 is located within the second opening 201, and the orthographic projection of the second connecting member 130 on the side wall of the second cylinder 200 is located within the second opening 201. For example, the opening size of the first opening 101 is smaller than the opening size of the second opening 201, and the maximum outer diameter of the second connecting member 130 is smaller than the opening size of the second opening 201. For example, the central axis of the first opening 101 can coincide with the central axis of the second opening 201, so that the first cylinder 100 and the second cylinder 200 can be aligned, and at the same time, the central axis of the second connecting member 130 coincides with the central axis of the second opening 201, so as to achieve the alignment of the second connecting member 130.

[0048] For example, Figure 2 As shown, at least part of the second connecting member 130 is located in the first cavity 150, and the size of the second connecting member 130 is smaller than the size of the second opening 201, so as to be detachably connected to the first connecting member 120 through the second opening 201. For example, the maximum outer diameter of the second connecting member 130 is smaller than the inner diameter of the second opening 201, and there is a first interval between the second connecting member 130 and the inner wall of the second opening 201, so that after the first cylinder 100 and the first connecting member 120 are located in the second cylinder 200, sufficient installation space can be reserved for the installation of the second connecting member 130, and the fluid flowing out of the liquid outlet end 320 of the damping valve assembly 300 is discharged into the first cavity 150.

[0049] For example, Figure 2 As shown, the damping valve assembly 300 further includes a valve housing 302, which is located on a side of the second cylinder 200 away from the first cylinder 100 and is fixedly connected to the side wall 210 of the second cylinder 200. For example, the valve housing 302 is cylindrical and serves as an outer housing of the damping valve assembly 300. For example, during the installation of the damping valve assembly 300, when the liquid inlet end 310 extends into the first cavity 150 and is sealed and connected to the second connecting member 130, the surfaces of the valve housing 302 and the second cylinder 200 facing each other fit each other. For example, the valve housing 302 can be welded to the second cylinder 200 to achieve a fixed connection.

[0050] For example, Figure 2 As shown, the first connecting member 120 includes a first channel 140 and an inner side wall 1401 surrounding the first channel 140. For example, the first connecting member 120 is cylindrical, and the first channel 140 passes through the first connecting member 120, so that the liquid inlet end 310 of the damping valve assembly 300 extends into the first channel 140. For example, at least a portion of the second connecting member 130 extends into the first channel 140 to be connected to the first connecting member 120.

[0051] For example, in some embodiments of the present invention, the second connecting member 130 may not extend into the first channel 140, but may be located on the outside of the first connecting member 120 and connected to the outer wall of the first connecting member 120, so that the liquid inlet end 310 of the damping valve assembly 300 extends into and is connected to the first channel 140.

[0052] For example, Figure 3 As shown, the second connector 130 includes a sealing connection portion 240, and the sealing connection portion 240 includes a second channel 250, an inner sidewall 2401 surrounding the second channel 250, and an outer sidewall 2402 away from the second channel 250. Figure 2 and Figure 3 As shown, the second channel 250 penetrates the second connecting member 130 , so that the liquid inlet end 310 of the damping valve assembly 300 extends into the second channel 250 and communicates with the first opening 101 of the first cylinder body 100 .

[0053] For example, Figure 2 and Figure 3 As shown, the inner side wall 2401 of the sealing connection part 240 is sealed and connected to the liquid inlet end 310. For example, a sealing member 400 may be provided between the inner side wall 2401 of the sealing connection part 240 and the outer side wall of the liquid inlet end 310 to achieve a sealing effect therebetween. For example, one of the outer side wall 3101 of the liquid inlet end 310 and the inner side wall 2401 of the sealing connection part 240 is provided with a sealing groove 315, and the sealing member 400 is located in the sealing groove 315.

[0054] For example, Figure 2 As shown, a sealing groove 315 is provided on the outer side wall 3101 of the liquid inlet end 310, and the sealing member 400 is located in the sealing groove 315. For example, the sealing groove 315 may be an annular groove and is arranged along the circumference of the liquid inlet end 310, and the sealing member 400 may be annular, so that when the sealing member 400 is arranged in the sealing groove 315, a good sealing effect is achieved in the circumference of the liquid inlet end 310. For example, a plurality of sealing grooves 315 may be provided on the outer side wall 3101 of the liquid inlet end 310, and the plurality of sealing grooves 315 are arranged in sequence and spaced apart along the axial direction of the second connecting member 130, so that the plurality of sealing members 400 may be arranged in the plurality of sealing grooves 315 in a one-to-one correspondence, respectively, to enhance the sealing effect.

[0055] For example, in some embodiments of the present invention, reference Figure 2 and Figure 3 The sealing groove 315 may also be disposed on the inner side wall 2401 of the sealing connection portion 240 , for example, may be disposed at a location where the local thickness of the sealing connection portion 240 is relatively large, so that the sealing connection portion 240 has good structural strength.

[0056] For example, Figure 2 and Figure 3 As shown, the outer side wall 2402 of the sealing connection part 240 is detachably connected to the inner side wall 1401 of the first connection member 120. For example, when the first cylinder body 100 and the first connection member 120 are both inserted into the second cylinder body 200, the second connection member 130 can be detachably connected to the first connection member 120. For example, the first connection member 120 and the second connection member 130 can be threaded. For example, the inner side wall 1401 of the first channel 140 of the first connection member 120 has an internal thread, and the outer side wall 2402 of the sealing connection part 240 has an external thread. Thus, the installation of the second connection member 130 is simpler and more convenient by adopting a detachable connection method. Of course, the embodiment of the utility model does not limit the connection method of the first connection member 120 and the second connection member 130. For example, other methods other than threaded connection, such as clamping, etc., can also be adopted, which can be set according to design requirements.

[0057] For example, Figure 2 and Figure 3 As shown, the sealing connection portion 240 also includes a first support portion 241 and a sealing portion 242. The first support portion 241 and the sealing portion 242 are connected to each other. For example, the two can be an integrated structure, and the first support portion 241 is closer to the central axis (i.e., the third central axis M3) of the second connecting member 130 than the sealing portion 242.

[0058] For example, Figure 2 and Figure 3 As shown, the second channel 250 of the second connecting member 130 includes a first sub-channel 2501 and a second sub-channel 2502 that are connected to each other, and the first sub-channel 2501 is closer to the damping valve assembly 300 than the second sub-channel 2502. For example, the sealing portion 242 surrounds the first sub-channel 2501, the first supporting portion 241 surrounds the second sub-channel 2502, and the first supporting portion 241 is located at the first central axis M1 (such as Figure 1 The dimension of the second sub-channel 2502 in the extending direction of the sealing portion 242 is larger than the dimension of the sealing portion 242 in the extending direction of the first central axis M1, so that the dimension N1 of the second sub-channel 2502 is smaller than the dimension N2 of the first sub-channel 2501. For example, the first supporting portion 241 protrudes relative to the inner side wall 2421 of the sealing portion 242, so that the inner side wall 2410 of the first supporting portion 241 is closer to the third central axis M3 of the second channel 250 than the inner side wall 2421 of the sealing portion 242, thereby forming a concave cavity in the second connecting member 130 to accommodate the liquid inlet end 310 of the damping valve assembly 300.

[0059] For example, Figure 2As shown, the liquid inlet end 310 of the damping valve assembly 300 is located in the first sub-channel 2501 and is spaced apart from the first support portion 241. For example, there is a certain distance between the end surface of the liquid inlet end 310 of the damping valve assembly 300 close to the first cylinder body 100 and the first support portion 241, for example, the distance may be 0.60 mm to 1.50 mm, such as 0.60 mm to 1.00 mm, 0.75 mm to 0.85 mm, 0.90 mm to 1.2 mm or 1.30 mm to 1.50 mm, so that sufficient installation space can be reserved for the liquid inlet end 310 of the damping valve assembly 300, and the risk of collision between the liquid inlet end 310 and the first support portion 241 can be reduced.

[0060] For example, Figure 3 As shown, the second connecting member 130 further includes a second supporting portion 244, which is connected to the sealing connecting portion 240 and extends in a direction away from the third central axis M3 of the second channel 250. For example, the second supporting portion 244 is located on a side of the sealing portion 242 away from the second channel 250, and the second supporting portion 244 and the sealing connecting portion 240 may be an integrated structure, and the two are made of the same material. Figure 2 and Figure 3 As shown, the second support portion 244 is located on a side of the first connection member 120 close to the damping valve assembly 300, and abuts against the end surface 121 of the first connection member 120 close to the second cylinder body 200. For example, the second support portion 244 and the surfaces of the first connection member 120 facing each other fit each other, so that the first connection member 120 can provide support for the second support portion 244, so as to facilitate the second support portion 244 to be stably arranged.

[0061] For example, Figure 2 As shown, the surface 2414 of the second support portion 244 away from the first connecting member 120 is located on the side of the second cylinder body 200 away from the first cylinder body 100. For example, the surface 2414 of the second support portion 244 exceeds the outer surface of the second cylinder body 200 and is located in the cavity surrounded by the valve housing 302 of the damping valve assembly 300. For example, there is a certain interval between the second support portion 244 and the liquid outlet 320 of the damping valve assembly 300 to facilitate the discharge of the fluid from the liquid outlet 320.

[0062] With such an arrangement, a portion of the second support portion 244 can be located on the side of the second cylinder body 200 close to the first cylinder body 100, and a portion thereof can be located in the cavity enclosed by the valve housing 302, thereby helping to reduce the restriction of the second support portion 244 on the inner diameter of the second cylinder body 200, making the inner diameter of the second cylinder body 200 smaller, which is conducive to miniaturized design.

[0063] For example, in some embodiments of the present invention, the second connecting member 130 may have a variety of structures, so that different installation methods can be provided according to design requirements. Figure 3 The plane shown in FIG. 1 is used as a reference plane for explanation.

[0064] For example, Figure 2 and Figure 3 As shown, the orthographic projection of the inner side wall 2421 of the sealing portion 242 on the reference plane is circular, the orthographic projection of the inner side wall 2410 of the first supporting portion 241 on the reference plane is circular, and the orthographic projection of the outer side wall 2441 of the second supporting portion 244 on the reference plane is polygonal. For example, the first sub-channel 2501 surrounded by the inner side wall 2421 of the sealing portion 242 is cylindrical, so as to facilitate sealing with the cylindrical liquid inlet end 310. The second sub-channel 2502 surrounded by the inner side wall 2410 of the first supporting portion 241 is cylindrical, so that the fluid can enter the second sub-channel 2502 at a more uniform flow rate. For example, the orthographic projection of the outer wall 2441 of the second support portion 244 on the reference plane can be a quadrilateral, a pentagon or a hexagon, so that it can be fitted with the outer wall 2441 of the second support portion 244 through a fixing device, and a fastening force can be applied to the second support portion 244 to connect the second connecting member 130 to the first connecting member 120.

[0065] For example, in some embodiments, reference Figure 2 and Figure 3 , the orthographic projection of the inner side wall 2421 of the sealing portion 242 on the reference plane is circular, for example, the first sub-channel 2501 surrounded by the inner side wall 2421 of the sealing portion 242 is cylindrical, so as to facilitate the sealing cooperation with the cylindrical liquid inlet end 310. For example, the orthographic projection of the outer side wall 2441 of the second support portion 244 on the reference plane is circular, so as to facilitate the fluid flowing out of the liquid outlet end 320 to flow out at a uniform flow rate along the circumference of the outer side wall 2441. For example, the orthographic projection of the inner side wall 2410 of the first support portion 241 on the reference plane is polygonal, such as a quadrilateral, a pentagon or a hexagon, so that it can be fitted with the inner side wall 2410 of the first support portion 241 through a fixing device, and a fastening force is applied to the first support portion 241, so that the second connector 130 is connected to the first connector 120.

[0066] For example, in some embodiments, reference Figure 2 and Figure 3, the orthographic projection of the inner side wall 2421 of the sealing portion 242 on the reference plane is circular, for example, the first sub-channel 2501 surrounded by the inner side wall 2421 of the sealing portion 242 is cylindrical, so as to facilitate the sealing cooperation with the cylindrical liquid inlet end 310. For example, the orthographic projection of the inner side wall 2410 of the first support portion 241 on the reference plane is circular. For example, the second sub-channel 2502 surrounded by the inner side wall 2410 of the first support portion 241 is cylindrical, so that the fluid can enter the second sub-channel 2502 at a more uniform flow rate. For example, the orthographic projection of the outer side wall 2441 of the second support portion 244 on the reference plane is circular, so as to facilitate the fluid flowing out of the liquid outlet end 320 to flow out at a uniform flow rate along the circumference of the outer side wall 2441.

[0067] For example, Figure 2 and Figure 5 As shown, the second connecting member 130 is away from the first central axis M1 (see Figure 1 ) has a plurality of recessed areas 260 on its surface, and each recessed area 260 is spaced apart from the second channel 250. For example, a plurality of recessed areas 260 are provided on the surface of the second support portion 244 away from the first cylinder body 100 to reduce the strength impact on the second connecting member 130. For example, when installing the second connecting member 130, a fixing device can be used to cooperate with the plurality of recessed areas 260, and a fastening force can be applied to the second support portion 244 to connect the second connecting member 130 to the first connecting member 120. With such a configuration, the distance between the second support portion 244 and the second opening 201 can be designed according to the discharge requirements of the fluid, that is, as long as the annular flow area between the second support portion 244 and the side wall of the second opening 201 is not less than the flow area of ​​the liquid inlet end 310, it is not necessary to increase the annular flow area for installing the second connecting member 130, so that the structural design of the second support portion 244 is more flexible.

[0068] For example, Figure 2 and Figure 3 As shown, the surface 2414 of the second support portion 244 facing the damping valve assembly 300 has a chamfer 270 to provide guidance for the fluid. For example, the edge of the surface 2414 of the second support portion 244 close to the third center axis M3 has a chamfer 2701 to facilitate the liquid inlet end 310 to extend into the first sub-channel 2501. For example, the edge of the surface 2414 of the second support portion 244 away from the third center axis M3 has a chamfer 2702 to facilitate the fluid flowing out of the liquid outlet end 320 of the damping valve assembly 300 to flow to the first cavity 150. For example, the outer edge of the surface of the second support portion 244 facing the first center axis M1 has a chamfer 2703, so that the second support portion 244 can be facilitated to cooperate with the first connecting member 120.

[0069] For example, Figure 2 and Figure 3 As shown, in some embodiments, the chamfer 270 may be a rounded corner. For example, the size and shape of the chamfer 270 disposed at different positions may be different, and the embodiments of the present utility model are not limited thereto.

[0070] For example, Figure 1 As shown, the shock absorber 01 further includes a third cylinder 500 located inside the first cylinder 100. The third cylinder 500 and the first cylinder 100 form a second cavity 510 located between the third cylinder 500 and the first cylinder 100, and the third cylinder 500 includes a third opening 501 located on the side wall of the third cylinder 500 and penetrating the third cylinder 500, and the third opening 501 is connected to the second cavity 510. For example, the third cylinder 500 can be used as a working cylinder, and the outer diameter of the third cylinder 500 is smaller than the inner diameter of the first cylinder 100, so that the third cylinder 500 can extend into the first cylinder 100. For example, the second cavity 510 is connected to the liquid inlet end 310 of the damping valve assembly 300, so that the fluid can enter the second cavity 510 from the third opening 501 and then flow into the liquid inlet end 310.

[0071] For example, Figure 1 As shown, the shock absorber 01 also includes a piston rod assembly 600, and at least part of the piston rod assembly 600 is located in the internal cavity of the third cylinder 500. For example, the piston rod assembly 600 includes a rod body piston portion 610 and a rod body 620, and the rod body 620 is connected to the piston portion 610, and the rod body 620 can drive the piston portion 610 to move in the internal cavity of the third cylinder 500. For example, the piston portion 610 is sealed and slidably connected to the inner surface of the third cylinder 500. For example, the central axis of the third cylinder 500 coincides with the first central axis M1 of the first cylinder 100, and the piston portion 610 can reciprocate along the first central axis M1 to change the pressure of the internal cavity of the third cylinder 500. For example, the internal cavity of the third cylinder 500 includes a first sub-cavity 520 and a second sub-cavity 540, and the first sub-cavity 520 and the second sub-cavity 540 are respectively located on both sides of the piston portion 610. For example, as Figure 1 As shown, when the piston rod assembly 600 moves along the first center axis M1 and in a direction away from the damping valve assembly 300, the fluid in the first sub-chamber 520 can enter the second chamber 510 through the third opening 501 of the third cylinder body 500, then enter the second channel 250 of the second connecting member 130, and then flow into the liquid inlet end 310 of the damping valve assembly 300.

[0072] At least one embodiment of the utility model further provides a method for installing a shock absorber.

[0073] like Figure 1As shown, the shock absorber 01 includes a first cylinder body 100, a second cylinder body 200, a damping valve assembly 300, a first connecting member 120 and a second connecting member 130. The first cylinder body 100 is cylindrical and includes a first opening 101 located on a side wall 110 of the first cylinder body 100 and penetrating the side wall 110. The second cylinder body 200 is cylindrical and includes a second opening 201 located on a side wall 210 of the second cylinder body 200 and penetrating the side wall 210. The damping valve assembly 300 includes a liquid inlet end 310 and a liquid outlet end 320.

[0074] like Figure 6 As shown, at least one embodiment of the present invention provides an installation method including the following steps S101 to S104:

[0075] Step S101 : fixedly connecting the first connecting member 120 to the side wall of the first opening 101 , and making the first connecting member 120 protrude from the side wall 110 of the first cylinder body 100 .

[0076] refer to Figure 2 The first connecting member 120 is annular, and the outer wall of the first connecting member 120 can be welded to the side wall of the first opening 101 so that the two are connected. For example, the first connecting member 120 can also be an integrated structure with the side wall 110 of the first cylinder body 100, that is, the two are made of the same material and formed by the same process, such as an extrusion molding process, but the embodiments of the utility model are not limited thereto. For example, the surface of the first connecting member 120 close to the internal cavity of the first cylinder body 100 can be made substantially flush with the inner surface of the side wall 110 of the first cylinder body 100, for example, the two can be made substantially coplanar, so as to reduce the resistance to the flow of the fluid.

[0077] Step S102 : extending the first cylinder body 100 together with the first connecting member 120 into the second cylinder body 200 to form a first cavity 150 between the first cylinder body 100 and the second cylinder body 200 .

[0078] refer to Figure 1 and Figure 2 After the first connecting member 120 is fixedly connected to the side wall of the first opening 101 of the first cylinder 100, the first cylinder 100 together with the first connecting member 120 is extended into the inner cavity of the second cylinder 200, for example, the first central axis M1 of the first cylinder 100 and the second central axis M2 of the second cylinder can be made to coincide with each other. At the same time, the second opening 201 of the second cylinder 200 exposes the first opening 101 of the first cylinder 100.

[0079] Step S103: detachably connect the second connecting member 130 to the first connecting member 120 .

[0080] refer to Figure 1 and Figure 2 Since the outer diameter of the second connecting member 130 is smaller than the inner diameter of the second opening 201, the second connecting member 130 can be passed through the second opening 201 and then placed in the first cavity 150, and then connected to the first connecting member 120. For example, the first connecting member 120 has an internal thread and the second connecting member 130 has an external thread, so that the second connecting member 130 can be threadedly connected to the first connecting member 120, but the embodiment of the utility model is not limited thereto. For example, when the second connecting member 130 has different structures, different connection methods can be adopted.

[0081] Step S104: The damping valve assembly 330 is fixedly connected to the side wall 220 of the second cylinder body 200, and the second connecting member 130 and the liquid inlet end 310 are sealed to connect the liquid inlet end 310 with the first opening 101, and the liquid outlet end 320 with the second opening 201, so that the damping valve assembly 330 can adjust the resistance of the fluid flowing from the first opening 101 to the second opening 201.

[0082] refer to Figure 1 to Figure 3 As shown, the second connecting member 130 includes a sealing connection portion 240, and the sealing connection portion 240 includes a second channel 250. For example, the liquid inlet end 310 of the damping valve assembly 330 can be extended into the second channel 250, and the outer surface of the liquid inlet end 310 and the inner surface of the second channel 250 are made to fit each other, so that the liquid inlet end 310 is connected to the first opening 101. The damping valve assembly 330 includes a valve housing 302, and the valve housing 302 can be made to contact the outer surface of the side wall 220 of the second cylinder 200, and the valve housing 302 and the side wall 220 of the second cylinder 200 are welded. Since there is a gap between the second connecting member 130 and the inner wall of the second opening 201, the fluid flowing out of the liquid outlet end 320 of the damping valve assembly 330 can enter the first cavity 150 through the gap. After the installation of the damping valve assembly 330 is completed, a first distance L1 is defined between the end face 121 of the first connecting member 120 close to the second cylinder body 200 and the first center axis M1 of the first cylinder body 100, a second distance L2 is defined between the side wall 210 of the second cylinder body 200 close to the inner surface of the first cylinder body 100 and the second center axis M2 of the second cylinder body 200, and the first distance L1 is smaller than the second distance L2.

[0083] In the installation method provided by the embodiment of the utility model, the first cylinder body 100 together with the first connecting member 120 is first extended into the second cylinder body 200, and then the second connecting member 130 is detachably connected to the first connecting member 120, and finally the damping valve assembly 330 is installed, and the first distance L1 between the end face 121 of the first connecting member 120 close to the second cylinder body 200 and the first center axis M1 of the first cylinder body 100 is small, so that when the first connecting member 120 is connected to the first cylinder body 100, there is enough space to extend into the second cylinder body 200, which can reduce the risk of interference between the first connecting member 120 and the inner wall of the second cylinder body 200, so as to reduce the first connecting member 120 from scratching or damaging the inner wall of the second cylinder body 200, thereby reducing the installation risk, making the assembly difficulty of the first cylinder body 100 lower; at the same time, it is beneficial to reduce the inner diameter of the second cylinder body 200, which is beneficial to the miniaturized design of the shock absorber.

[0084] For example, refer to Figure 2 The shock absorber 01 further includes a sealing member 400, and a sealing groove 315 is provided on the inner side wall 2401 of the sealing connection portion 240 or the outer side wall of the liquid inlet end 310. Before the damping valve assembly 330 is fixedly connected to the side wall of the second cylinder body 200, the installation method further includes: arranging the sealing member 400 in the sealing groove 315 so that the inner side wall 2401 of the sealing connection portion 240 is sealed and connected to the liquid inlet end 310. For example, Figure 2 As shown, a sealing groove 315 is provided on the outer side wall 3101 of the liquid inlet end 310, and the sealing member 400 is located in the sealing groove 315. For example, the sealing groove 315 may be an annular groove and is arranged along the circumference of the liquid inlet end 310, and the sealing member 400 may be annular, so that after the sealing member 400 is arranged in the sealing groove 315, the liquid inlet end 310 together with the sealing member 400 are extended into the second channel 250 of the sealing connection part 240, and the sealing member 400 is used to enhance the sealing effect between the liquid inlet end 310 and the inner side wall 2401 of the sealing connection part 240.

[0085] There are a few points to note:

[0086] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention, and other structures may refer to the conventional designs.

[0087] (2) In the absence of conflict, features in the same embodiment or in different embodiments of the present invention may be combined with each other.

[0088] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A shock absorber, characterized in that: include: A first cylinder body, the first cylinder body is cylindrical and includes a first opening located on a side wall of the first cylinder body and penetrating the side wall; a second cylinder body, which is cylindrical and sleeved on the outside of the first cylinder body and forms a first cavity between the first cylinder body and the second cylinder body with the first cylinder body, and the second cylinder body includes a second opening located on a side wall of the second cylinder body and penetrating the side wall; and A damping valve assembly, comprising a liquid inlet end and a liquid outlet end, wherein the liquid inlet end is connected to the first opening, and the liquid outlet end is connected to the second opening, and the damping valve assembly is configured to adjust the resistance of the fluid flowing from the first opening to the second opening. The shock absorber further comprises a first connecting member and a second connecting member, wherein the first connecting member is fixedly connected to the side wall of the first opening and protrudes from the side wall of the first cylinder body, the second connecting member is detachably connected to the first connecting member, and the second connecting member is sealedly connected to the liquid inlet end to connect the liquid inlet end with the first opening. There is a first distance between the end surface of the first connecting member close to the second cylinder body and the first center axis of the first cylinder body, and there is a second distance between the side wall of the second cylinder body close to the inner surface of the first cylinder body and the second center axis of the second cylinder body, and the first distance is smaller than the second distance.

2. The shock absorber according to claim 1, characterized in that: At least a portion of the second connecting member is located in the first cavity, and a size of the second connecting member is smaller than a size of the second opening, so that the second connecting member is detachably connected to the first connecting member through the second opening.

3. The shock absorber according to claim 1, characterized in that: The orthographic projection of the first opening on the side wall of the second cylinder body is located within the second opening, and the orthographic projection of the second connecting member on the side wall of the second cylinder body is located within the second opening.

4. The shock absorber according to claim 1, characterized in that: The damping valve assembly further includes a valve housing, which is located on a side of the second cylinder body away from the first cylinder body and is fixedly connected to a side wall of the second cylinder body.

5. The vibration absorber according to any one of claims 1 to 4, characterized in that: The first connecting member includes a first channel and an inner side wall surrounding the first channel, and the second connecting member includes: The sealing connection portion includes a second channel, an inner wall surrounding the second channel, and an outer wall away from the second channel. Wherein, the inner side wall of the sealing connection part is sealedly connected to the liquid inlet end, and the outer side wall of the sealing connection part is detachably connected to the inner side wall of the first connecting member.

6. The shock absorber according to claim 5, characterized in that Also includes seals, Wherein, a sealing groove is provided on the inner side wall of the sealing connection portion or the outer side wall of the liquid inlet end, and the sealing member is located in the sealing groove.

7. The vibration absorber according to claim 5, characterized in that: The second channel of the second connecting member includes a first sub-channel and a second sub-channel that are connected to each other, the first sub-channel is closer to the damping valve assembly than the second sub-channel, The sealing connection portion also includes a first supporting portion and a sealing portion, the sealing portion surrounds the first sub-channel, the first supporting portion surrounds the second sub-channel, the size of the first supporting portion in the extension direction of the first central axis is larger than the size of the sealing portion in the extension direction of the first central axis, so that the size of the second sub-channel is smaller than the size of the first sub-channel, and the liquid inlet end is located in the first sub-channel and is spaced apart from the first supporting portion.

8. The shock absorber according to claim 7, characterized in that The second connecting member further includes a second supporting portion, which is connected to the sealing connecting portion and extends in a direction away from a third central axis of the second channel. The second supporting portion is located at a side of the first connecting member close to the damping valve assembly and abuts against an end surface of the first connecting member close to the second cylinder body.

9. The vibration absorber according to claim 8, characterized in that A surface of the second supporting portion away from the first connecting member is located at a side of the second cylinder body away from the first cylinder body.

10. The vibration absorber according to claim 8, characterized in that The orthographic projection of the inner side wall of the sealing portion on a reference plane perpendicular to the third central axis is circular, the orthographic projection of the inner side wall of the first supporting portion on the reference plane is circular, and the orthographic projection of the outer side wall of the second supporting portion on the reference plane is polygonal.

11. The shock absorber according to claim 8, characterized in that The orthographic projection of the inner side wall of the sealing portion on a reference plane perpendicular to the third central axis is circular, the orthographic projection of the inner side wall of the first supporting portion on the reference plane is polygonal, and the orthographic projection of the outer side wall of the second supporting portion on the reference plane is circular.

12. The shock absorber according to claim 8, characterized in that The orthographic projection of the inner side wall of the sealing portion on a reference plane perpendicular to the third central axis is circular, the orthographic projection of the inner side wall of the first supporting portion on the reference plane is circular, and the orthographic projection of the outer side wall of the second supporting portion on the reference plane is circular, A surface of the second connecting member away from the first central axis has a plurality of recessed areas, and each of the recessed areas is spaced apart from the second channel.

13. The shock absorber according to claim 8, characterized in that Outer edges of a surface of the second supporting portion facing the damping valve assembly and a surface of the second supporting portion facing the first central axis are chamfered, respectively.

14. The vibration absorber according to any one of claims 1 to 4, characterized in that: The first connecting member and the side wall of the first cylinder body are an integrated structure.

15. The vibration absorber according to any one of claims 1 to 4, characterized in that: The first connecting member is threadedly connected to the second connecting member.

16. The vibration absorber according to any one of claims 1 to 4, characterized in that: There is a third distance between the outer surface of the first cylinder and the inner surface of the second cylinder, and the difference between the first distance and the second distance is 1 / 4 to 1 / 2 of the third distance.

17. The vibration absorber according to any one of claims 1 to 4, characterized in that: Also includes: The third cylinder body is located inside the first cylinder body, The third cylinder and the first cylinder form a second cavity between the third cylinder and the first cylinder. The third cylinder includes a third opening located on a side wall of the third cylinder and penetrating the third cylinder. The third opening is communicated with the second cavity.

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