Shock absorber and installation method thereof

Abstract

The invention provides a shock absorber and an installation method thereof, the shock absorber 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 present disclosure relates to a shock absorber and an installation method thereof. Background Art

[0002] In an automotive suspension system, for a hydraulic cylinder shock absorber, when relative movement occurs between a vehicle frame and an axle due to vibration, a piston rod will move up and down within the shock absorber, causing the damping fluid in the shock absorber cavity to repeatedly flow between different chambers. Thus, 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, and a damping effect is achieved. While the shock absorber effectively alleviates the vibration of the vehicle frame and the vehicle body and improves the ride comfort of the vehicle, the reliability of its own structure and assembly is crucial. Summary of the Invention

[0003] At least one embodiment of the present disclosure provides a shock absorber and an installation method thereof. By making a first distance between a first connecting member and a first central axis less than a second distance between an inner surface of a side wall of a second cylinder close to a first cylinder and a second central axis, the first connecting member and the second connecting member are detachably connected, and the second connecting member is in fit connection with a liquid inlet end of a damping valve assembly. Thus, the installation space required for installing an intermediate cylinder can be reduced. For example, the inner diameter of the second cylinder cooperating therewith can be reduced, which is beneficial to the miniaturized design of the shock absorber. At the same time, the risk of collision and rubbing between the first connecting member and the inner wall of the second cylinder can also be reduced, and the assembly difficulty of the intermediate cylinder is lowered.

[0004] At least one embodiment of the present disclosure 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 sleeved outside the first cylinder body, and forms a first cavity between the first cylinder body and the second 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 communicated with the first opening, the liquid outlet end is communicated with 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. Wherein, the shock absorber further 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 and the liquid inlet end are hermetically connected to communicate 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 central axis of the first cylinder body, and 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 central axis of the second cylinder body. The first distance is less than the second distance.

[0005] For example, in the shock absorber provided by at least one embodiment of the present disclosure, at least a part of the second connecting member is located in the first cavity, and the size of the second connecting member is smaller than the 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, in the shock absorber provided by at least one embodiment of the present disclosure, 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 disclosure, the damping valve assembly further includes a valve housing, and the valve housing is located on the side of the second cylinder body away from the first cylinder body and is fixedly connected to the side wall of the second cylinder body.

[0008] For example, in the shock absorber provided by at least one embodiment of the present disclosure, the first connecting member includes a first channel and an inner side wall surrounding the first channel. The second connecting member includes: a sealing connection part, including a second channel, an inner side wall surrounding the second channel, and an outer side wall away from the second channel. Wherein, the inner side wall of the sealing connection part is hermetically 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.

[0009] For example, according to at least one embodiment of the present disclosure, the shock absorber further includes a seal, wherein a seal groove is provided on the inner side wall of the seal connection portion or the outer side wall of the liquid inlet end, and the seal is located within the seal groove.

[0010] For example, according to at least one embodiment of the present disclosure, the second channel of the second connecting member includes a first sub-channel and a second sub-channel that communicate with each other. The first sub-channel is closer to the damper valve assembly than the second sub-channel. The seal connection portion further includes a first support portion and a seal portion. The seal portion surrounds the first sub-channel, and the first support portion surrounds the second sub-channel. The dimension of the first support portion in the extending direction of the first central axis is greater than the dimension of the seal portion in the extending direction of the first central axis, so that the dimension of the second sub-channel is smaller than that of the first sub-channel. The liquid inlet end is located in the first sub-channel and is spaced apart from the first support portion.

[0011] For example, according to at least one embodiment of the present disclosure, the second connecting member further includes a second support portion. The second support portion is connected to the seal connection portion and extends along a direction away from the third central axis of the second channel. The second support portion is located on a side of the first connecting member close to the damper valve assembly and abuts against an end face of the first connecting member close to the second cylinder block.

[0012] For example, according to at least one embodiment of the present disclosure, the surface of the second support portion away from the first connecting member is located on a side of the second cylinder block away from the first cylinder block.

[0013] For example, according to at least one embodiment of the present disclosure, the positive projection of the inner side wall of the seal portion on a reference plane perpendicular to the third central axis is circular, the positive projection of the inner side wall of the first support portion on the reference plane is circular, and the positive projection of the outer side wall of the second support portion on the reference plane is polygonal.

[0014] For example, according to at least one embodiment of the present disclosure, the positive projection of the inner side wall of the seal portion on a reference plane perpendicular to the third central axis is circular, the positive projection of the inner side wall of the first support portion on the reference plane is polygonal, and the positive projection of the outer side wall of the second support portion on the reference plane is circular.

[0015] For example, according to a shock absorber provided by at least one embodiment of the present disclosure, a positive projection of an inner sidewall of the sealing portion on a reference plane perpendicular to the third central axis is circular, a positive projection of an inner sidewall of the first support portion on the reference plane is circular, a positive projection of an outer sidewall of the second support portion on the reference plane is circular, and 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.

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

[0017] For example, according to a shock absorber provided by at least one embodiment of the present disclosure, the first connecting member and a sidewall of the first cylinder body are of an integral structure.

[0018] For example, according to a shock absorber provided by at least one embodiment of the present disclosure, the first connecting member and the second connecting member are in threaded connection.

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

[0020] For example, according to a shock absorber provided by at least one embodiment of the present disclosure, the shock absorber further includes a third cylinder body located inside 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, the third cylinder body includes a third opening located on a sidewall of the third cylinder body and penetrating through the third cylinder body, and the third opening is communicated with the second cavity.

[0021] At least one embodiment of the present disclosure further provides a method for installing a shock absorber. 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 the 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 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 installation method includes: fixedly connecting 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; inserting the first cylinder body together with the first connecting member into the second cylinder body to form a first cavity between the first cylinder body and the second cylinder body; detachably connecting the second connecting member to the first connecting member; fixedly connecting the damping valve assembly to the side wall of the second cylinder body and making the second connecting member and the liquid inlet end in sealed connection to connect the liquid inlet end to the first opening and make the liquid outlet end communicate 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, there is a first distance 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, and 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 central axis of the second cylinder body, and the first distance is less than the second distance.

[0022] For example, according to the installation method of the shock absorber provided by at least one embodiment of the present disclosure, wherein the second connecting member includes a sealed connection portion, the shock absorber further includes a sealing member, and a sealing groove is provided on the inner side wall of the sealed connection portion or the outer side wall of the liquid inlet end. Before fixedly connecting the damping valve assembly to the side wall of the second cylinder body, the installation method further includes: arranging the sealing member in the sealing groove to make the inner side wall of the sealed connection portion and the liquid inlet end in sealed connection. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, 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 disclosure and do not limit the present disclosure.

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

[0025] Figure 2 For Figure 1 The partial structure schematic diagram of the shock absorber shown.

[0026] Figure 3 ForFigure 1 Front orthographic perspective view of the second connecting member in the shock absorber shown

[0027] Figure 4 is Figure 1 Top view of the second connecting member in the shock absorber shown

[0028] Figure 5 Top view of another second connecting member provided by at least one embodiment of the present disclosure

[0029] Figure 6 Flowchart of the installation method provided by at least one embodiment of the present disclosure Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items

[0032] Generally, a shock absorber includes an oil storage cylinder, an intermediate cylinder and a working cylinder. The intermediate cylinder is sleeved outside the working cylinder, and the oil storage cylinder is sleeved outside the intermediate cylinder. The shock absorber further includes a damping valve assembly. The liquid inlet end of the damping valve assembly is communicated with 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 electromagnet core, a rod body and a movable valve connected to the rod body. The electromagnetic coil can drive the rod body to drive the electromagnet core to reciprocate in the cavity of the damping valve assembly, and affect the flow state of the damping liquid by controlling the opening degree of the movable valve, thereby changing the damping pressure

[0033] In the research, the inventors of the present disclosure found that: Generally, the side wall of the middle cylinder of a shock absorber includes an opening and a connecting structure disposed around the circumference of the opening. For example, the connecting structure protrudes relative to the main body portion 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 extend into the connecting structure, and thus can communicate with the opening of the middle cylinder. However, in order to ensure the installation stability of the damping valve assembly, the general size of the connecting structure is relatively large, which makes the maximum size of the middle cylinder in the radial direction relatively large. During the assembly process of the shock absorber, the middle cylinder needs to be sleeved inside the oil storage cylinder. Therefore, there is a high possibility that the connecting structure of the middle cylinder will rub against the inner wall of the oil storage cylinder, damaging the structure of the oil storage cylinder, and even damaging the connecting structure itself, resulting in the damping valve assembly being unable to be installed normally. In addition, since the connecting structure protrudes in the radial direction relative to the main body portion of the middle cylinder, the installation space required for the middle cylinder during installation is relatively large. Correspondingly, the inner diameter of the oil storage cylinder needs to be large enough so that the middle cylinder can extend into it and meet the installation requirements. Therefore, the installation risk of the middle cylinder with the above structure is relatively high, and it is not conducive to the miniaturization design of the shock absorber.

[0034] At least one embodiment of the present disclosure provides a shock absorber and an installation method thereof.

[0035] At least one embodiment of the present disclosure 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 outside the first cylinder body, and forms a first cavity between the first cylinder body and the second 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, and the liquid outlet end is connected to the second opening. 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 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, and the second connecting member and the liquid inlet end are hermetically connected to connect the liquid inlet end to the first opening. There is a first distance between the end face of the first connecting member close to the second cylinder body and the first central axis of the first cylinder body, and 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 central axis of the second cylinder body. The first distance is less than the second distance.

[0036] The shock absorber provided by at least one embodiment of the present disclosure can reduce the installation space required for the intermediate cylinder during installation, for example, can reduce the inner diameter of the second cylinder body that cooperates with it, which is beneficial to the miniaturized design of the shock absorber. At the same time, the risk of collision and rubbing between the first connecting member and the inner wall of the second cylinder body can be reduced, and the assembly difficulty of the intermediate cylinder can be lowered by making the first distance between the first connecting member and the first central axis less 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 is detachably connected to the second connecting member, and the second connecting member is cooperatively connected to the liquid inlet end of the damping valve assembly.

[0037] Next, the shock absorber and its installation method provided by the embodiments of the present disclosure will be described in conjunction with the accompanying drawings.

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

[0039] As Figure 1 shown, the shock absorber 01 includes: a first cylinder body 100, a second cylinder body 200, and a damping valve assembly 300. The first cylinder body 100 and the second cylinder body 200 are in a cylindrical shape, and the second cylinder body 200 is sleeved outside the first cylinder body 100, so that a first cavity 150 is formed between the first cylinder body 100 and the second cylinder body 200. For example, the shock absorber 01 may further include other cylinder bodies (such as a working cylinder) inside the first cylinder body 100, so that the first cylinder body 100 serves as an intermediate cylinder. For example, the second cylinder body 200 may be an oil storage cylinder.

[0040] As Figure 1 shown, the first cylinder body 100 includes a first opening 101 located on the side wall 110 of the first cylinder body 100 and penetrating the side wall 110. The first opening 101 can allow fluid (such as damping fluid) to flow between the inner side and the outer side of the side wall 110 of the first cylinder body 100. The second cylinder body 200 includes a second opening 201 located on the side wall 210 of the second cylinder body 200 and penetrating the side wall 210. The second opening 201 can allow fluid to flow between the inner side and the outer side of the side wall 110 of the second cylinder body 200.

[0041] As 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 in communication with the first opening 101, and the liquid outlet end 320 is in communication with 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 that 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 in communication with 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 in communication with the second opening 201 through its liquid outlet, and thus is in communication with the first cavity 150. For example, the damping valve assembly 300 further includes an electromagnet core 330, a rod body 340, and a movable valve 350. The rod body 340 penetrates through the electromagnet core 330 along the axial direction of the damping valve assembly 300 and is connected to the electromagnet core 330, and the rod body 340 is configured to transmit the adjusting force on the electromagnet core 330 to the movable valve 350. For example, the rod body 340 can drive the movable valve 350 to reciprocate, thereby changing the opening state of the movable valve 350 to control the flow rate of the damping liquid.

[0042] As Figure 1 As shown, the shock absorber 01 further includes a first connecting member 120 and a second connecting member 130. 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 block 100. For example, the first connecting member 120 can be welded, clamped, etc. to 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 hermetically connected to the liquid inlet end 310 to communicate 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 snap-connected or thread-connected to each other, but are 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] As 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 block 200 and the first central axis M1 of the first cylinder block 100. There is a second distance L2 between the inner surface of the side wall 210 of the second cylinder block 200 close to the first cylinder block 100 and the second central axis M2 of the second cylinder block 200, and the first distance L1 is less than the second distance L2. For example, the first central axis M1 of the first cylinder block 100 coincides with the second central axis M2 of the second cylinder block 200. The end face 121 of the first connecting member 120 close to the second cylinder block 200 is located in the first cavity 150 and does not extend beyond the second opening 201 in the radial direction of the second cylinder block 200. For example, the second distance L2 between the inner surface of the side wall 210 of the second cylinder block 200 close to the first cylinder block 100 and the second central axis M2 is the inner diameter of the second cylinder block 200.

[0044] Since the first distance L1 is small and less than the inner diameter of the second cylinder block 200, when the first connecting member 120 is connected to the first cylinder block 100, there is enough space to extend into the second cylinder block 200, which is beneficial to reducing the inner diameter of the second cylinder block 200 and conducive to 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 block 200 can be reduced to reduce the scraping or damage of the inner wall of the second cylinder block 200 by the first connecting member 120, thereby reducing the installation risk and making the assembly difficulty of the first cylinder block 100 lower.

[0045] For example, as Figure 1 shown, there is a third distance L3 between the outer surface of the first cylinder block 100 and the inner surface of the second cylinder block 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 face 121 of the first connecting member 120 and the inner surface of the second cylinder block 200. By making this distance 1 / 4 to 1 / 2 of the above-mentioned third distance L3, such as 1 / 4, 1 / 3 or 1 / 2, it is beneficial to reserve installation space for the first cylinder block 100 together with the first connecting member 120, thereby reducing the installation risk and facilitating the miniaturized design of the second cylinder block 200.

[0046] For example, as Figure 2 shown, the first connecting member 120 and the side wall 110 of the first cylinder block 100 are of an integral structure. For example, the material of the first connecting member 120 is the same as that of the first cylinder block 100 and is made by the same process. Thereby, it is beneficial to simplify the manufacturing process and reduce the assembly difficulty.

[0047] For example, as Figure 2As shown, the orthographic projection of the first opening 101 on the side wall 210 of the second cylinder block 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 block 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 block 100 can be aligned with the second cylinder block 200. At the same time, the central axis of the second connecting member 130 coincides with the central axis of the second opening 201 to achieve the alignment of the second connecting member 130.

[0048] For example, as Figure 2 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 gap between the second connecting member 130 and the inner wall of the second opening 201, so that after the first cylinder block 100 and the first connecting member 120 are located in the second cylinder block 200, enough installation space can be reserved for the installation of the second connecting member 130, and it is beneficial to discharge the fluid flowing out from the liquid outlet end 320 of the damper valve assembly 300 to the first cavity 150.

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

[0050] For example, as Figure 2 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 penetrates through the first connecting member 120, so that the liquid inlet end 310 of the damper valve assembly 300 extends into the first channel 140. For example, at least part 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 disclosure, the second connecting member 130 may not extend into the first channel 140, but be located outside 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, as Figure 3 shown, the second connecting member 130 includes a sealing connection portion 240, and the sealing connection portion 240 includes a second channel 250, an inner side wall 2401 surrounding the second channel 250, and an outer side wall 2402 away from the second channel 250. For example, as Figure 2 and Figure 3 shown, the second channel 250 penetrates through 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 is in communication with the first opening 101 of the first cylinder block 100.

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

[0054] For example, as Figure 2 shown, a sealing groove 315 is formed on the outer side wall 3101 of the liquid inlet end 310, and the seal 400 is located in the sealing groove 315. For example, the sealing groove 315 may be an annular groove and is arranged along the circumferential direction of the liquid inlet end 310, and the seal 400 may be annular, so that when the seal 400 is arranged in the sealing groove 315, a good sealing effect is achieved in the circumferential direction 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 sequentially arranged at intervals along the axial direction of the second connecting member 130, so that a plurality of seals 400 can be respectively arranged in the plurality of sealing grooves 315 one by one to enhance the sealing effect.

[0055] For example, in some embodiments of the present disclosure, referring to Figure 2 and Figure 3 , the sealing groove 315 may also be provided on the inner side wall 2401 of the sealing connection portion 240, for example, it may be provided at a position 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, asFigure 2 and Figure 3 As shown, the outer sidewall 2402 of the sealed connection portion 240 is detachably connected to the inner sidewall 1401 of the first connection member 120. For example, after the first cylinder block 100 and the first connection member 120 are both inserted into the second cylinder block 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 threadedly connected. For example, the inner sidewall 1401 of the first channel 140 of the first connection member 120 has an internal thread, and the outer sidewall 2402 of the sealed connection portion 240 has an external thread. Thus, the detachable connection method makes the installation of the second connection member 130 easier and more convenient. Of course, the embodiments of the present disclosure do not limit the connection method of the first connection member 120 and the second connection member 130. For example, other methods besides threaded connection can also be used, such as snap connection, etc., which can be specifically set according to design requirements.

[0057] For example, as Figure 2 and Figure 3 shown, the sealed connection portion 240 further 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 integral structure, and the first support portion 241 is closer to the central axis (i.e., the third central axis M3) of the second connection member 130 than the sealing portion 242.

[0058] For example, as Figure 2 and Figure 3 shown, the second channel 250 of the second connection member 130 includes a first sub-channel 2501 and a second sub-channel 2502 that communicate with 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 support portion 241 surrounds the second sub-channel 2502, and the dimension of the first support portion 241 in the extending direction of the first central axis M1 (as Figure 1 shown) is greater 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 support portion 241 protrudes relative to the inner sidewall 2421 of the sealing portion 242, so that the inner sidewall 2410 of the first support portion 241 is closer to the third central axis M3 of the second channel 250 than the inner sidewall 2421 of the sealing portion 242. Thus, a cavity can be formed in the second connection member 130 to accommodate the liquid inlet end 310 of the damping valve assembly 300.

[0059] For example, as 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 face of the liquid inlet end 310 of the damping valve assembly 300 close to the first cylinder block 100 and the first support portion 241. For example, this distance can 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 as to reserve sufficient installation space for the liquid inlet end 310 of the damping valve assembly 300 and reduce the risk of collision between the liquid inlet end 310 and the first support portion 241.

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

[0061] For example, as 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 block 200 away from the first cylinder block 100. For example, the surface 2414 of the second support portion 244 extends beyond the outer surface of the second cylinder block 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 end 320 of the damping valve assembly 300 to facilitate the discharge of fluid from the liquid outlet end 320.

[0062] With such a setting, a part of the second support portion 244 can be located on the side of the second cylinder block 200 close to the first cylinder block 100, and a part of it can be located in the cavity surrounded by the valve housing 302, which is beneficial to reducing the restriction of the second support portion 244 on the inner diameter of the second cylinder block 200, making the inner diameter of the second cylinder block 200 smaller and facilitating miniaturized design.

[0063] For example, in some embodiments of the present disclosure, the second connecting member 130 may have various structures, so that different installation methods can be adopted according to design requirements. The following embodiments are described with a plane perpendicular to the third central axis M3 of the second channel 250 (such as Figure 3 shown) as the reference plane.

[0064] For example, as Figure 2 and Figure 3 shown, the positive projection of the inner side wall 2421 of the sealing portion 242 on the reference plane is circular, the positive projection of the inner side wall 2410 of the first support portion 241 on the reference plane is circular, and the positive projection of the outer side wall 2441 of the second support 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 to facilitate sealing cooperation with the cylindrical liquid inlet end 310. 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 positive projection of the outer side wall 2441 of the second support portion 244 on the reference plane can be a quadrilateral, pentagon or hexagon, so that the fixing device can be attached to the outer side wall 2441 of the second support portion 244 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, referring to Figure 2 and Figure 3 , the positive 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 to facilitate sealing cooperation with the cylindrical liquid inlet end 310. For example, the positive projection of the outer side wall 2441 of the second support portion 244 on the reference plane is circular to facilitate the fluid flowing out from the liquid outlet end 320 to flow out along the circumference of the outer side wall 2441 at a uniform flow rate. For example, the positive projection of the inner side wall 2410 of the first support portion 241 on the reference plane is polygonal, such as a quadrilateral, pentagon or hexagon, so that the fixing device can be attached to the inner side wall 2410 of the first support portion 241 and a fastening force can be applied to the first support portion 241 to connect the second connecting member 130 to the first connecting member 120.

[0066] For example, in some embodiments, referring to Figure 2 and Figure 3, the orthographic projection of the inner sidewall 2421 of the sealing portion 242 on the reference plane is circular. For example, the first sub-channel 2501 surrounded by the inner sidewall 2421 of the sealing portion 242 is cylindrical, which is conducive to the sealing fit with the cylindrical liquid inlet end 310. For example, the orthographic projection of the inner sidewall 2410 of the first support portion 241 on the reference plane is circular. For example, the second sub-channel 2502 surrounded by the inner sidewall 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 sidewall 2441 of the second support portion 244 on the reference plane is circular, which is conducive to the fluid flowing out from the liquid outlet end 320 to flow out along the circumferential direction of the outer sidewall 2441 at a uniform flow rate.

[0067] For example, as Figure 2 and Figure 5 shown, the surface of the second connecting member 130 away from the first central axis M1 (see Figure 1 ) has a plurality of recessed areas 260, and each recessed area 260 is spaced from the second channel 250. For example, the plurality of recessed areas 260 are opened on the surface of the second support portion 244 away from the first cylinder block 100 to reduce the influence on the strength of the second connecting member 130. For example, when installing the second connecting member 130, it can be cooperated with the plurality of recessed areas 260 through a fixing device and a tightening force is applied to the second support portion 244 so that the second connecting member 130 is connected to the first connecting member 120. With such a setting, the distance between the second support portion 244 and the second opening 201 can be designed according to the discharge requirement 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, so that it is not necessary to increase the above annular flow area for installing the second connecting member 130, making the structural design of the second support portion 244 more flexible.

[0068] For example, as Figure 2 and Figure 3 shown, the surface 2414 of the second support portion 244 facing the damper 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 central 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 central axis M3 has a chamfer 2702 to facilitate the fluid flowing out from the liquid outlet end 320 of the damper 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 central axis M1 has a chamfer 2703, which can facilitate the cooperation between the second support portion 244 and the first connecting member 120.

[0069] For example, asFigure 2 and Figure 3 As shown in Figure 3 , in some embodiments, the chamfer 270 may be a rounded chamfer. For example, the sizes and shapes of the chamfers 270 provided at different positions may be different, and the embodiments of the present disclosure do not limit this.

[0070] For example, as Figure 1 shown in Figure 1 , the shock absorber 01 further includes a third cylinder 500 located within 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. The third cylinder 500 includes a third opening 501 located on the side wall of the third cylinder 500 and penetrating through the third cylinder 500, and the third opening 501 is in communication with the second cavity 510. For example, the third cylinder 500 may serve 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 in communication with the liquid inlet end 310 of the damping valve assembly 300, so that fluid can enter the second cavity 510 from the third opening 501 and then flow into the liquid inlet end 310.

[0071] For example, as Figure 1 shown in Figure 1 , the shock absorber 01 further includes a piston rod assembly 600, and at least a part of the piston rod assembly 600 is located in the inner 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. The rod body 620 can drive the piston portion 610 to move in the inner 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 in the inner cavity of the third cylinder 500. For example, the inner 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 shown in Figure 1 , when the piston rod assembly 600 moves along the first central axis M1 and in a direction away from the damping valve assembly 300, the fluid in the first sub-cavity 520 can enter the second cavity 510 through the third opening 501 of the third cylinder 500, then enter the second channel 250 of the second connector 130, and then flow into the liquid inlet end 310 of the damping valve assembly 300.

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

[0073] As Figure 1As shown, the shock absorber 01 includes a first cylinder block 100, a second cylinder block 200, a damping valve assembly 300, a first connecting member 120, and a second connecting member 130. The first cylinder block 100 is cylindrical and includes a first opening 101 located on the side wall 110 of the first cylinder block 100 and penetrating the side wall 110. The second cylinder block 200 is cylindrical and includes a second opening 201 located on the side wall 210 of the second cylinder block 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] As Figure 6 shown, the installation method provided by at least one embodiment of the present disclosure includes the following steps S101 to S104:

[0075] Step S101: Fix the first connecting member 120 to the side wall of the first opening 101 and make the first connecting member 120 protrude from the side wall 110 of the first cylinder block 100.

[0076] Referring Figure 2 to, the first connecting member 120 is annular. The outer wall of the first connecting member 120 can be welded to the side wall of the first opening 101 to connect the two. For example, the first connecting member 120 can also be an integral structure with the side wall 110 of the first cylinder block 100, that is, the two are made of the same material and formed through the same process. For example, an extrusion molding process can be used, but the embodiments of the present disclosure are not limited thereto. For example, the surface of the first connecting member 120 close to the inner cavity of the first cylinder block 100 can be made substantially flush with the inner surface of the side wall 110 of the first cylinder block 100. For example, the two can be made substantially coplanar to facilitate reducing the resistance to fluid flow.

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

[0078] Referring Figure 1 and Figure 2 to, after the first connecting member 120 is fixedly connected to the side wall of the first opening 101 of the first cylinder block 100, insert the first cylinder block 100 together with the first connecting member 120 into the inner cavity of the second cylinder block 200. For example, the first central axis M1 of the first cylinder block 100 can be made to coincide with the second central axis M2 of the second cylinder block. At the same time, make the second opening 201 of the second cylinder block 200 expose the first opening 101 of the first cylinder block 100.

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

[0080] Referring Figure 1 andFigure 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 into 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. However, the embodiments of the present disclosure are not limited thereto. For example, when the second connecting member 130 has a different structure, different connection methods can be adopted.

[0081] Step S104: Fix the damping valve assembly 330 to the side wall 220 of the second cylinder body 200, and make the second connecting member 130 and the liquid inlet end 310 be sealingly connected, so as to connect the liquid inlet end 310 with the first opening 101, and make the liquid outlet end 320 communicate 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] Reference Figures 1 to 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 inserted into the second channel 250, and the outer surface of the liquid inlet end 310 is made to fit with the inner surface of the second channel 250, so that the liquid inlet end 310 communicates with 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 body 200, and the valve housing 302 is welded to the side wall 220 of the second cylinder body 200. Since there is a gap between the second connecting member 130 and the inner wall of the second opening 201, the fluid flowing out from the liquid outlet end 320 of the damping valve assembly 330 can enter the first cavity 150 through this gap. When the installation of the damping valve assembly 330 is completed, 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 less than the second distance L2.

[0083] In the installation method provided by the embodiments of the present disclosure, first, the first cylinder block 100 together with the first connecting member 120 is inserted into the second cylinder block 200, then the second connecting member 130 is detachably connected to the first connecting member 120, and finally the damping valve assembly 330 is installed. Moreover, the first distance L1 between the end face 121 of the first connecting member 120 close to the second cylinder block 200 and the first central axis M1 of the first cylinder block 100 is relatively small. Thus, when the first connecting member 120 is connected to the first cylinder block 100, there is enough space to extend into the second cylinder block 200, which can reduce the risk of interference between the first connecting member 120 and the inner wall of the second cylinder block 200, so as to reduce the scraping or damage of the inner wall of the second cylinder block 200 by the first connecting member 120, thereby reducing the installation risk and making the assembly difficulty of the first cylinder block 100 lower. At the same time, it is beneficial to reduce the inner diameter of the second cylinder block 200 and is conducive to the miniaturized design of the shock absorber.

[0084] For example, referring to Figure 2 , the shock absorber 01 further includes a seal 400, and a seal groove 315 is provided on the inner side wall 2401 of the seal connection portion 240 or the outer side wall of the liquid inlet end 310. Before fixedly connecting the damping valve assembly 330 to the side wall of the second cylinder block 200, this installation method further includes: arranging the seal 400 in the seal groove 315 so that the inner side wall 2401 of the seal connection portion 240 is hermetically connected to the liquid inlet end 310. For example, as Figure 2 shown, a seal groove 315 is formed on the outer side wall 3101 of the liquid inlet end 310, and the seal 400 is located in this seal groove 315. For example, the seal groove 315 can be an annular groove and is arranged along the circumferential direction of the liquid inlet end 310, and the seal 400 can be annular. Thus, after the seal 400 is arranged in the seal groove 315, the liquid inlet end 310 together with the seal 400 is inserted into the second channel 250 of the seal connection portion 240, and the sealing effect between the liquid inlet end 310 and the inner side wall 2401 of the seal connection portion 240 is enhanced by the seal 400.

[0085] The following points need to be explained:

[0086] (1) In the accompanying drawings of the embodiments of the present disclosure, only the structures related to the embodiments of the present disclosure are involved, and other structures can refer to the general design.

[0087] (2) Without conflict, the features in the same embodiment and different embodiments of the present disclosure can be combined with each other.

[0088] The above description is only an exemplary implementation manner of the present disclosure and is not used to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A shock absorber, comprising: A first cylinder body, the first cylinder body being cylindrical and including a first opening located on the side wall of the first cylinder body and penetrating the side wall; A second cylinder body, the second cylinder body being cylindrical and sleeved outside the first cylinder body, and forming a first cavity between the first cylinder body and the second cylinder body, the second cylinder body including a second opening located on the side wall of the second cylinder body and penetrating the side wall; and A damping valve assembly, including a liquid inlet end and a liquid outlet end, the liquid inlet end being communicated with the first opening, the liquid outlet end being communicated with the second opening, and the damping valve assembly being configured to adjust the resistance of the fluid flowing from the first opening to the second opening, Wherein, the shock absorber further 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, and the second connecting member and the liquid inlet end are hermetically connected to communicate the liquid inlet end with the first opening, There is a first distance between the end face of the first connecting member close to the second cylinder body and the first central axis of the first cylinder body, and 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 central axis of the second cylinder body, and the first distance is less than the second distance.

2. The shock absorber according to claim 1, wherein, At least a part of the second connecting member is located in the first cavity, and the size of the second connecting member is smaller than the 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, wherein, 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, wherein, The damping valve assembly further includes a valve housing, the valve housing is located on the side of the second cylinder body away from the first cylinder body and is fixedly connected to the side wall of the second cylinder body.

5. The shock absorber according to any one of claims 1-4, wherein, The first connecting member includes a first channel and an inner side wall surrounding the first channel, and the second connecting member includes: A sealing connection portion, including a second channel, an inner side wall surrounding the second channel, and an outer side wall away from the second channel, Wherein, the inner side wall of the sealing connection portion is hermetically connected to the liquid inlet end, and the outer side wall of the sealing connection portion is detachably connected to the inner side wall of the first connecting member.

6. The shock absorber according to claim 5, further comprising a sealing member, Among them, 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 within the sealing groove.

7. The shock absorber according to claim 5, wherein, The second channel of the second connecting member includes a first sub-channel and a second sub-channel that are communicated with each other, and the first sub-channel is closer to the damping valve assembly than the second sub-channel. The sealed connection part further includes a first support part and a sealing part. The sealing part surrounds the first sub-channel, and the first support part surrounds the second sub-channel. The dimension of the first support part in the extending direction of the first central axis is larger than that of the sealing part in the extending direction of the first central axis, so that the dimension of the second sub-channel is smaller than that of the first sub-channel. The liquid inlet end is located in the first sub-channel and is spaced from the first support part.

8. The shock absorber according to claim 5, wherein, The second connecting piece further includes a second support part. The second support part is connected to the sealed connection part and extends along the direction away from the third central axis of the second channel. The second support part is located on the side of the first connecting piece close to the damper valve assembly and abuts against the end face of the first connecting piece close to the second cylinder block.

9. The shock absorber according to claim 8, wherein, The surface of the second support part away from the first connecting piece is located on the side of the second cylinder block away from the first cylinder block.

10. The shock absorber according to claim 8, wherein, The positive projection of the inner side wall of the sealing part on a reference plane perpendicular to the third central axis is circular, the positive projection of the inner side wall of the first support part on the reference plane is circular, and the positive projection of the outer side wall of the second support part on the reference plane is polygonal.

11. The shock absorber according to claim 8, wherein, The positive projection of the inner side wall of the sealing part on a reference plane perpendicular to the third central axis is circular, the positive projection of the inner side wall of the first support part on the reference plane is polygonal, and the positive projection of the outer side wall of the second support part on the reference plane is circular.

12. The shock absorber according to claim 8, wherein, The positive projection of the inner side wall of the sealing part on a reference plane perpendicular to the third central axis is circular, the positive projection of the inner side wall of the first support part on the reference plane is circular, and the positive projection of the outer side wall of the second support part on the reference plane is circular. The surface of the second connecting piece away from the first central axis has a plurality of recessed areas, and each recessed area is spaced from the second channel.

13. The shock absorber according to claim 8, wherein, The outer edges of the surface of the second support part facing the damper valve assembly and the surface facing the first central axis respectively have chamfers.

14. The shock absorber according to any one of claims 1-4, wherein, The side wall of the first connecting piece and the first cylinder block is an integral structure.

15. The shock absorber according to any one of claims 1-4, wherein, The first connecting piece is threadedly connected to the second connecting piece.

16. The shock absorber according to any one of claims 1-4, wherein, There is a third distance between the outer surface of the first cylinder block and the inner surface of the second cylinder block, and the difference between the first distance and the second distance is 1 / 4 to 1 / 2 of the third distance.

17. The shock absorber according to any one of claims 1-4 further includes: A third cylinder block located inside the first cylinder block. Wherein, the third cylinder block and the first cylinder block form a second cavity located between the third cylinder block and the first cylinder block. The third cylinder block includes a third opening located on the side wall of the third cylinder block and penetrating the third cylinder block, and the third opening is communicated with the second cavity.

18. 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 the side wall of the first cylinder body and penetrating through the side wall. The second cylinder body is cylindrical and includes a second opening located on the side wall of the second cylinder body and penetrating through the side wall. The damping valve assembly includes a liquid inlet end and a liquid outlet end. The installation method includes: Fix the first connecting member to the side wall of the first opening and make the first connecting member protrude from the side wall of the first cylinder body. Insert the first cylinder body together with the first connecting member into the second cylinder body to form a first cavity between the first cylinder body and the second cylinder body. Detachably connect the second connecting member to the first connecting member. Fix the damping valve assembly to the side wall of the second cylinder body and make the second connecting member and the liquid inlet end in sealed connection so as to connect the liquid inlet end with the first opening, and make the liquid outlet end communicate 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, there is a first distance between the end face of the first connecting member close to the second cylinder body and the first central axis of the first cylinder body, and 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 central axis of the second cylinder body, and the first distance is less than the second distance.

19. The installation method of the shock absorber according to claim 18, wherein, The second connecting member includes a sealed connection portion. The shock absorber further includes a seal. A seal groove is provided on the inner side wall of the sealed connection portion or the outer side wall of the liquid inlet end. Before fixing the damping valve assembly to the side wall of the second cylinder body, the installation method further includes: Set the seal in the seal groove so that the inner side wall of the sealed connection portion is in sealed connection with the liquid inlet end.

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