Shock absorber and mechanical equipment

Abstract

The invention provides a shock absorber. The shock absorber comprises a first cylinder barrel, a containing space used for containing a first piston is formed in the first cylinder barrel, and the first piston is suitable for dividing the first cylinder barrel into a first piston cavity and a second piston cavity; the second cylinder barrel is arranged on the outer side of the first cylinder barrel in a sleeving mode, and a first working cavity is defined between the side wall of the first cylinder barrel and the side wall of the second cylinder barrel; the third cylinder barrel is arranged on the outer side of the second cylinder barrel in a sleeving mode, a second working cavity is defined between the side wall of the second cylinder barrel and the side wall of the third cylinder barrel, and the second working cavity is in fluid communication with the second piston cavity through a communicating pipe; the damping valve set is in fluid communication with the first piston cavity through the first working cavity and further in fluid communication with the second working cavity. According to the shock absorber, the response speed and the vibration absorption capacity can be remarkably improved; it is guaranteed that the oil flowing space of the damping valve set is greatly increased, and the coupling performance of the damping valve set and the shock absorber is improved; the device is suitable for engineering equipment or vehicles under severe working conditions.

Description

Technical Field

[0001] The present invention relates to the field of vibration damping equipment, and provides a shock absorber and a mechanical device. Background Art

[0002] In the fields of vibration damping technology and fluid control, the magnetorheological damping valve, as an emerging technology, has shown broad prospects. Although the traditional shock absorber design can provide good vibration damping effects within a specific range, there are many deficiencies, which limit its application under complex working conditions. First, due to the limitation of the piston stroke of the single-tube hydraulic shock absorber, it cannot effectively respond to complex dynamic load changes, restricting its application effect in a large-stroke vibration environment. Second, the double-tube hydraulic shock absorber improves its performance by increasing the oil flow space. Although it can theoretically provide greater damping force, due to the narrow oil flow path, it is still difficult to achieve ideal flow control in actual operation, which limits its flexibility and environmental adaptability. Summary of the Invention

[0003] An embodiment of the present invention provides a shock absorber to improve the coupling performance between the damping valve group and the shock absorber.

[0004] An embodiment of the present invention also provides a mechanical device.

[0005] An embodiment of the first aspect of the present invention provides a shock absorber, including: A first cylinder, in which a receiving space for arranging a first piston is formed, and the first piston is adapted to divide the first cylinder into a first piston chamber and a second piston chamber; A second cylinder, sleeved outside the first cylinder, and a first working chamber is formed between the side wall of the first cylinder and the side wall of the second cylinder; A third cylinder, sleeved outside the second cylinder, and a second working chamber is formed between the side wall of the second cylinder and the side wall of the third cylinder. The second working chamber is in fluid communication with the second piston chamber through a communication pipe; A damping valve group, which is in fluid communication with the first piston chamber through the first working chamber, and the damping valve group is also in fluid communication with the second working chamber.

[0006] According to an embodiment of the present invention, a second piston is arranged in the second working chamber, and the second piston is adapted to divide the second working chamber into a liquid injection chamber and a compensation chamber. The damping valve group is in fluid communication with the liquid injection chamber, and the compensation chamber is filled with gas.

[0007] According to an embodiment of the present invention, along the radial direction of the second piston, a first groove is provided on the opposite first side wall of the second piston, and / or, Axially along the second piston, second grooves are provided on opposite second side walls of the second piston; When the second piston moves relative to the second working chamber, the first groove and / or the second groove are adapted to deform.

[0008] According to an embodiment of the present invention, a liquid passing hole is formed in a side wall of one end of the first working chamber close to the first piston chamber, and the first working chamber is adapted to be in fluid communication with the first piston chamber through the liquid passing hole.

[0009] According to an embodiment of the present invention, the damping valve group includes a hydraulic pipe and a damping valve body. Both ends of the hydraulic pipe are in fluid communication with the first working chamber and the second working chamber, and the damping valve body is disposed on the hydraulic pipe.

[0010] According to an embodiment of the present invention, it further includes a mounting seat and an end cover. The first cylinder barrel, the second cylinder barrel, and the third cylinder barrel are detachably connected to at least one of the mounting seat and the end cover, and the damping valve group is connected to a side of the mounting seat facing away from the first cylinder barrel.

[0011] According to an embodiment of the present invention, sealing members are provided between the first cylinder barrel, the second cylinder barrel, and the third cylinder barrel and the mounting seat and the end cover.

[0012] According to an embodiment of the present invention, a through hole is formed in the end cover, a piston rod is provided on the first piston, a part of the piston rod is located in the first piston chamber and another part of the piston rod passes through the through hole.

[0013] According to an embodiment of the present invention, the first cylinder barrel, the second cylinder barrel, and the third cylinder barrel are coaxially arranged.

[0014] An embodiment of the second aspect of the present invention provides a mechanical device, including a shock absorber as described above.

[0015] The shock absorber provided by the first aspect embodiment of the present invention forms a multi-stage damping and buffering path through the multi-layer structure design of the first piston chamber, the second piston chamber, the first working chamber, and the second working chamber, significantly improving the response speed and vibration absorption capacity of the shock absorber. The fluid communication design between the second working chamber and the second piston chamber can quickly balance the pressure difference on both sides of the piston, reduce the impact feeling caused by sudden pressure changes, and improve the riding comfort. The damping valve group can independently adjust the damping force of the compression and rebound strokes through two-way fluid communication, that is, the first piston chamber, the first working chamber, the damping valve group, and the second working chamber, to meet the vibration suppression requirements under complex working conditions. The nested sleeve structure significantly reduces the space occupation. At the same time, through the optimized design of the fluid path, the energy loss is reduced, and the energy efficiency ratio of the shock absorber is improved. The sealing design of the multi-layer sleeve effectively isolates external environmental interference and extends the service life of the shock absorber, especially suitable for engineering equipment or vehicles under harsh working conditions.

[0016] The mechanical equipment provided by the second aspect embodiment of the present invention, because the shock absorber can effectively absorb and buffer the vibration transmitted from the outside, reduces the vibration amplitude and frequency of the mechanical equipment during operation. This enables each component of the mechanical equipment to work in a relatively stable environment, reduces the risk of component loosening, wear, and damage caused by vibration, thereby improving the overall stability and reliability of the mechanical equipment and extending the service life of the mechanical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the shock absorber provided by the present invention.

[0019] Figure 2 It is a schematic structural diagram of the first piston moving towards the second piston chamber in the shock absorber provided by the present invention.

[0020] Figure 3 It is a schematic structural diagram of the first piston moving towards the first piston chamber in the shock absorber provided by the present invention.

[0021] Figure 4 It is a schematic longitudinal sectional view of the first piston moving towards the second piston chamber in the shock absorber provided by the present invention.

[0022] Figure 5 It is a schematic longitudinal sectional view of the first piston moving towards the first piston chamber in the shock absorber provided by the present invention.

[0023] Figure 6 It is a schematic cross-sectional view of the second piston provided by the present invention.

[0024] Reference numerals: 100, first cylinder; 102, accommodation space; 104, first piston; 106, first piston chamber; 108, second piston chamber; 110, second cylinder; 112, first working chamber; 114, third cylinder; 116, second working chamber; 117, connecting pipe; 118, damping valve group; 120, second piston; 122, liquid injection chamber; 124, compensation chamber; 126, first groove; 128, second groove; 130, liquid passing hole; 132, hydraulic pipe; 134, damping valve body; 136, mounting seat; 138, end cover; 140, piston rod. Specific embodiments

[0025] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] As Figures 1 to 6 shown, an embodiment of the first aspect of the present invention provides a shock absorber, including: A first cylinder 100, in which an accommodation space 102 for arranging a first piston 104 is formed, and the first piston 104 is adapted to divide the first cylinder 100 into a first piston chamber 106 and a second piston chamber 108; A second cylinder 110, sleeved outside the first cylinder 100, and a first working chamber 112 is formed by surrounding between the side wall of the first cylinder 100 and the side wall of the second cylinder 110; A third cylinder 114, sleeved outside the second cylinder 110, and a second working chamber 116 is formed by surrounding between the side wall of the second cylinder 110 and the side wall of the third cylinder 114, and the second working chamber 116 is in fluid communication with the second piston chamber 108 through a connecting pipe 117; A damping valve group 118, which is in fluid communication with the first piston chamber 106 through the first working chamber 112, and the damping valve group 118 is also in fluid communication with the second working chamber 116.

[0027] The shock absorber provided by the embodiment of the first aspect of the present invention, through the multi-layer structure design of the first piston chamber 106, the second piston chamber 108, the first working chamber 112 and the second working chamber 116, forms a multi-stage damping and buffering path, significantly improving the response speed and vibration absorption capacity of the shock absorber. The fluid communication design between the second working chamber 116 and the second piston chamber 108 can quickly balance the pressure difference on both sides of the piston, reduce the impact feeling caused by sudden pressure changes, and improve ride comfort. The damping valve group 118, through two-way fluid communication, i.e., the first piston chamber 106, the first working chamber 112, the damping valve group 118, and the second working chamber 116, can independently adjust the damping force of the compression and rebound strokes to meet the vibration suppression requirements under complex working conditions. The nested sleeve structure greatly reduces the space occupation. At the same time, through the optimized design of the fluid path, the energy loss is reduced, and the energy efficiency ratio of the shock absorber is improved. The sealing design of the multi-layer sleeve effectively isolates external environmental interference and extends the service life of the shock absorber, especially suitable for engineering equipment or vehicles under harsh working conditions.

[0028] Please continue to refer to Figures 1 to 6 , the shock absorber provided by the embodiment of the present invention adopts a multi-layer sleeve structure design to form a sufficient oil flow space for combining the magnetorheological damping valve body 134, improving the coupling performance between the magnetorheological damping valve body 134 and the shock absorber. This shock absorber can be applied to automotive suspensions or other mechanical equipment.

[0029] Specifically, an accommodation space 102 is formed inside the first cylinder 100 for arranging the first piston 104. The first piston 104 divides the accommodation space 102 inside the first cylinder 100 into a first piston chamber 106 and a second piston chamber 108, and the fluid pressure change is realized through the movement of the first piston 104 in the two chambers.

[0030] The second cylinder 110 is sleeved outside the first cylinder 100, and a first working chamber 112 is formed between the side wall of the second cylinder 110 and the first cylinder 100. The first working chamber 112 is directly connected to the damping valve group 118 for transmitting fluid pressure. The third cylinder 114 is sleeved outside the second cylinder 110, and a second working chamber 116 is formed between the side wall of the third cylinder 114 and the second cylinder 110. The second working chamber 116 is connected to the second piston chamber 108 through a connecting pipe 117 to form a pressure balance path.

[0031] One end of the damping valve group 118 is fluidly connected to the first piston chamber 106 through the first working chamber 112, and the other end is connected to the second working chamber 116. By controlling the flow rate of the fluid between the chambers, the adjustment of the damping force is realized. Thus, through the arrangement of the first cylinder 100, the second cylinder 110, and the third cylinder 114, the oil flow space of the damping valve group 118 is greatly increased, and the coupling performance between the damping valve group 118 and the shock absorber is improved.

[0032] In addition, the two-way communication structure of the damping valve group 118 with the first working chamber 112 and the second working chamber 116 enables the damping valve group 118 to adjust the damping in real time according to the pressure difference between the first piston chamber 106 and the second piston chamber 108, achieving an accurate match between the damping force response speed and the piston movement frequency, and reducing the common "lag" phenomenon in traditional single-chamber shock absorbers.

[0033] According to an embodiment of the present invention, a second piston 120 is disposed in the second working chamber 116. The second piston 120 is adapted to divide the second working chamber 116 into a liquid injection chamber 122 and a compensation chamber 124. The damping valve group 118 is in fluid communication with the liquid injection chamber 122, and the compensation chamber 124 is filled with gas.

[0034] In an embodiment of the present invention, a second piston 120 is installed in the second working chamber 116. The second piston 120 divides the second working chamber 116 into an independent liquid injection chamber 122 and a compensation chamber 124. The liquid injection chamber 122 is used to accommodate the fluid medium (such as hydraulic oil, etc.) required for the operation of the shock absorber, while the compensation chamber 124 is filled with gas (such as inert gas like nitrogen, etc.).

[0035] The damping valve group 118 is in fluid communication with the liquid injection chamber 122. This means that during the operation of the shock absorber, a continuous fluid circulation path is formed among the first piston chamber 106, the first working chamber 112, the liquid injection chamber 122, and the second piston chamber 108. Through the adjustment of the damping valve group 118, the flow of the fluid between these chambers is controlled.

[0036] The gas filled in the compensation chamber 124 is compressible. When the shock absorber is operating, due to the flow of the fluid and the movement of the piston, the volume of the liquid injection chamber 122 will change. At this time, the gas in the compensation chamber 124 can be compressed or expanded to adapt to the volume change of the liquid injection chamber 122, thereby maintaining the pressure balance within the entire system.

[0037] The second piston 120 divides the second working chamber 116 into a liquid injection chamber 122 and a compensation chamber 124. The gas filled in the compensation chamber 124 can effectively compensate for the volume change of the liquid injection chamber 122 caused by the piston movement, maintaining the stability of the pressure within the system. This avoids the degradation of the shock absorber performance caused by excessive pressure fluctuations and improves the working stability of the shock absorber under various working conditions. The connection of the damping valve group 118 with the liquid injection chamber 122 makes the flow of the fluid between the chambers more orderly and controllable. By precisely adjusting the flow rate and flow direction of the fluid, the damping force of the shock absorber during the compression and stretching strokes can be adjusted more accurately, further enhancing the response speed and damping effect of the shock absorber.

[0038] According to an embodiment of the present invention, along the radial direction of the second piston 120, a first groove 126 is provided on the opposite first side wall of the second piston 120, and / or, Along the axial direction of the second piston 120, second grooves 128 are provided on opposite second side walls of the second piston 120; When the second piston 120 moves relative to the second working chamber 116, the first groove 126 and / or the second groove 128 are adapted to deform.

[0039] In an embodiment of the present invention, along the radial direction of the second piston 120, first grooves 126 are provided on opposite first side walls of the second piston 120. These first grooves 126 may be evenly distributed in multiple numbers, or may be arranged specifically according to actual requirements. Along the axial direction of the second piston 120, second grooves 128 are provided on opposite second side walls of the second piston 120. Similarly, the number and distribution of the second grooves 128 can also be adjusted according to design requirements.

[0040] When the second piston 120 moves in the second working chamber 116, for example, when displacement occurs due to fluid pressure changes during the operation of the shock absorber, the first groove 126 and / or the second groove 128 will deform accordingly. This deformation is generated based on the structural characteristics of the groove itself and the forces exerted on the second piston 120 in the chamber.

[0041] The second piston 120 divides the second working chamber 116 into a liquid injection chamber 122 and a compensation chamber 124. The provision of the first groove 126 and the second groove 128 does not damage the partitioning function of the second piston 120 for the chamber. At the same time, the first groove 126 and the second groove 128 cooperate with the damping valve group 118 and the entire fluid circulation system of the shock absorber to jointly optimize the performance of the shock absorber. When the second piston 120 moves, the first groove 126 and the second groove 128 deform, capable of absorbing and buffering part of the impact force generated by the piston movement. This enables the second piston 120 to adapt more flexibly in the face of complex pressure changes, reducing the energy loss caused by rigid collisions and further enhancing the buffering performance of the shock absorber. The deformation of the first groove 126 and / or the second groove 128 will change the fluid flow path and flow velocity distribution around the second piston 120. To a certain extent, this change can optimize the fluid flow state in the liquid injection chamber 122 and the second working chamber 116, reduce fluid resistance and turbulence phenomena, improve the working efficiency of the shock absorber, and make the fluid circulation between the chambers more smooth.

[0042] According to an embodiment of the present invention, a liquid passing hole 130 is provided on the side wall of one end of the first working chamber 112 close to the first piston chamber 106, and the first working chamber 112 is adapted to be in fluid communication with the first piston chamber 106 through the liquid passing hole 130.

[0043] In an embodiment of the present invention, a liquid passing hole 130 is formed in the side wall of one end of the first working chamber 112 close to the first piston chamber 106. Through the liquid passing hole 130, a fluid flow path is established between the first working chamber 112 and the first piston chamber 106. When the first piston 104 moves in the first piston chamber 106, the pressure in the first piston chamber 106 changes. At this time, the fluid can flow between the first piston chamber 106 and the first working chamber 112 through the liquid passing hole 130. And this fluid flow cooperates with the damping valve group 118. The damping valve group 118 controls the entire flow process of the fluid from the first piston chamber 106 through the first working chamber 112 to the second working chamber 116. The setting of the liquid passing hole 130 ensures that the fluid between the first piston chamber 106 and the first working chamber 112 can be smoothly exchanged, and then participates in the working cycle of the entire shock absorber, and cooperates with other components to achieve the shock absorption function.

[0044] The setting of the liquid passing hole 130 provides a necessary channel for the fluid flow between the first piston chamber 106 and the first working chamber 112, enabling the fluid inside the shock absorber to form a complete circulation system. Through this circulation, when the first piston 104 moves, the fluid can flow between different chambers, thereby generating a damping force, effectively absorbing and buffering the vibration energy, and improving the shock absorption effect of the shock absorber. The liquid passing hole 130 cooperates with the damping valve group 118 to jointly adjust the external force in the first direction received by the first piston 104 in the first piston chamber 106. The flow rate and velocity of the fluid passing through the liquid passing hole 130 can be controlled by the damping valve group 118. According to different working conditions, the flow of the fluid between the first piston chamber 106 and the first working chamber 112 is precisely adjusted to achieve fine adjustment of the damping force in the first direction, improving the adaptability and performance of the shock absorber.

[0045] In addition, the presence of the liquid passing hole 130 makes the pressure transmission between the first piston chamber 106 and the first working chamber 112 more direct and rapid. When the first piston 104 is subjected to an external force and moves, the pressure change in the first piston chamber 106 can be quickly transmitted to the first working chamber 112 through the liquid passing hole 130, thereby causing subsequent fluid flow and damping force changes. This enables the shock absorber to respond more quickly to external vibrations, provide an appropriate damping force in a timely manner, and enhance the dynamic response performance of the shock absorber.

[0046] According to an embodiment of the present invention, the damping valve group 118 includes a hydraulic pipe 132 and a damping valve body 134. Both ends of the hydraulic pipe 132 are in fluid communication with the first working chamber 112 and the second working chamber 116, and the damping valve body 134 is arranged on the hydraulic pipe 132.

[0047] The damping valve group 118 is composed of a hydraulic pipe 132 and a damping valve body 134. The two ends of the hydraulic pipe 132 are respectively connected to the first working chamber 112 and the second working chamber 116 to provide a channel for the flow of fluid between the two chambers. The damping valve body 134 is arranged on the hydraulic pipe 132. When the fluid flows from the first piston chamber 106 into the first working chamber 112 through the liquid hole 130, part of the fluid will flow to the second working chamber 116 through the hydraulic pipe 132. In this process, the damping valve body 134 plays a key regulating role. It can control the flow rate and flow velocity of the fluid through the hydraulic pipe 132 according to the working state of the shock absorber and the vibration of the external input, thereby adjusting the external force exerted on the first piston 104 in the first piston chamber 106.

[0048] According to one embodiment of the present invention, it also includes a mounting seat 136 and an end cover 138, the first cylinder 100, the second cylinder 110 and the third cylinder 114 are detachably connected to at least one of the mounting seat 136 and the end cover 138, and the damping valve group 118 is connected to the side of the mounting seat 136 away from the first cylinder 100.

[0049] In one embodiment of the present invention, the first cylinder 100, the second cylinder 110 and the third cylinder 114 are detachably connected to at least one of the mounting base 136 and the end cover 138. The detachable connection may be a threaded connection, a snap connection or other suitable mechanical connection. With this connection, when it is necessary to inspect, maintain or replace the internal components of the shock absorber, the corresponding sleeve can be easily removed, which provides convenience for subsequent operations.

[0050] The damping valve assembly 118 is connected to the side of the mounting seat 136 away from the first cylinder 100. Such a layout design makes the installation position of the damping valve assembly 118 relatively independent and easy to operate.

[0051] The mounting seat 136 and the end cover 138 cooperate with each sleeve and the damping valve group 118 to form a complete structure of the shock absorber. The mounting seat 136 not only supports and fixes each component, but also provides a mounting base for the damping valve group 118; the end cover 138 can seal and protect the structure inside the first cylinder 100. When the shock absorber is working, each component works together to achieve effective absorption and buffering of vibration through the movement of the piston in the sleeve, the flow of the fluid between the chambers, and the adjustment of the damping valve group 118.

[0052] The detachable connection of the first cylinder 100, the second cylinder 110, and the third cylinder 114 to the mounting seat 136 and the end cap 138 enables the easy disassembly of relevant components during the maintenance and repair of the shock absorber, facilitating the inspection of internal structures such as pistons, chambers, and fluid channels for damage or faults. For the damper valve group 118, since it is installed on the side of the mounting seat 136 away from the first cylinder 100, it is also easy to perform separate inspections, repairs, and replacements, reducing the maintenance cost and difficulty and improving the maintainability of the shock absorber.

[0053] According to an embodiment of the present invention, seals are provided between the first cylinder 100, the second cylinder 110, and the third cylinder 114 and the mounting seat 136 and the end cap 138.

[0054] In an embodiment of the present invention, seals are provided between the first cylinder 100, the second cylinder 110, and the third cylinder 114 and the mounting seat 136 and the end cap 138. Specifically, the function of these seals is to ensure good sealing at the connection parts between components, preventing the leakage of fluid media (such as hydraulic oil) inside the shock absorber. The seals can be in various forms, such as rubber sealing rings, O-rings, etc., and appropriate sealing materials and structures are selected according to different connection parts and working environments.

[0055] The setting of the seals effectively prevents the leakage of the fluid media inside the shock absorber, ensuring stable pressure between chambers and normal circulation of the fluid. This is crucial for the performance of the shock absorber because fluid leakage will cause a decrease in the damping force of the shock absorber, affecting its shock absorption effect, and may even lead to the failure of the shock absorber. Through good sealing, the service life of the shock absorber is extended, and the need for frequent maintenance and replacement due to leakage is reduced.

[0056] According to an embodiment of the present invention, a through-hole is provided on the end cap 138, a piston rod 140 is provided on the first piston 104, and a part of the piston rod 140 is located in the first piston chamber 106 and another part of the piston rod 140 passes through the through-hole.

[0057] In an embodiment of the present invention, a through-hole is provided on the end cap 138, and the position of the through-hole corresponds to the position of the first piston 104 so that the piston rod 140 on the first piston 104 can pass through. A piston rod 140 is provided on the first piston 104. A part of the piston rod 140 is located inside the first piston chamber 106 and moves with the reciprocating movement of the first piston 104 in the first piston chamber 106, and another part passes through the through-hole on the end cap 138.

[0058] The design of the through-hole in the end cover 138 through which the piston rod 140 passes enables the movement of the first piston 104 in the first piston chamber 106 to be effectively transmitted to external components that require vibration damping. When the vehicle or equipment is vibrated, the external vibration is transmitted to the first piston 104 through the piston rod 140. The first piston 104 moves in the first piston chamber 106, causing fluid flow between the chambers and adjustment of the damping valve group 118, thereby achieving absorption and buffering of the vibration and feeding back the damping effect to the external components, improving the comfort and stability of the vehicle or equipment.

[0059] According to an embodiment of the present invention, the first cylinder 100, the second cylinder 110, and the third cylinder 114 are coaxially arranged.

[0060] In an embodiment of the present invention, the central axes of the three sleeves coincide. From the inside to the outside, they are the first cylinder 100, the second cylinder 110, and the third cylinder 114 in sequence. A space for accommodating the first piston 104 is formed inside the first cylinder 100; the second cylinder 110 is sleeved outside the first cylinder 100, and a first working chamber 112 is formed by enclosing between their side walls; the third cylinder 114 is further sleeved outside the second cylinder 110, and a second working chamber 116 is formed between the side walls of the second cylinder 110 and the third cylinder 114. Since the three sleeves are coaxial, the structure of the entire shock absorber has good symmetry in space.

[0061] An embodiment of the second aspect of the present invention provides a mechanical device including the shock absorber as described above.

[0062] According to the mechanical device provided by the embodiment of the second aspect of the present invention, since the shock absorber can effectively absorb and buffer the vibration transmitted from the outside, the vibration amplitude and frequency during the operation of the mechanical device are reduced. This enables each component of the mechanical device to work in a relatively stable environment, reducing the risk of component loosening, wear, and damage caused by vibration, thereby improving the overall stability and reliability of the mechanical device and extending the service life of the mechanical device.

[0063] In the overall structure of the mechanical device, the installation position of the shock absorber is reasonably arranged according to the specific type and working requirements of the mechanical device. It is usually installed between components in the mechanical device that are prone to vibration or at positions that are easily affected by vibration when in contact with the outside world. For example, in a vehicle, it can be installed between the vehicle frame and the wheels, and in an industrial mechanical device, it can be installed between the motor and the working platform, etc. When the mechanical device is operating, the external vibration is transmitted to the shock absorber, and the shock absorber absorbs and buffers the vibration energy through the movement of the internal piston, the fluid flow between the chambers, and the adjustment of the damping valve group 118, thereby reducing the impact of the vibration on other components of the mechanical device.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shock absorber, characterized in that, include: A first cylinder (100), wherein a receiving space (102) for arranging a first piston (104) is formed in the first cylinder (100), and the first piston (104) is suitable for dividing the first cylinder (100) into a first piston chamber (106) and a second piston chamber (108); The second cylinder (110) is sleeved on the outside of the first cylinder (100), and a first working chamber (112) is formed between the side wall of the first cylinder (100) and the side wall of the second cylinder (110); The third cylinder (114) is sleeved on the outer side of the second cylinder (110), and a second working chamber (116) is formed between the side wall of the second cylinder (110) and the side wall of the third cylinder (114), and the second working chamber (116) is fluidically connected to the second piston chamber (108) via a connecting pipe (117); The damping valve group (118) is in fluid communication with the first piston chamber (106) via the first working chamber (112); the damping valve group (118) is also in fluid communication with the second working chamber (116).

2. The shock absorber according to claim 1, wherein A second piston (120) is arranged in the second working chamber (116), and the second piston (120) is suitable for dividing the second working chamber (116) into a liquid injection chamber (122) and a compensation chamber (124). The damping valve group (118) is fluidically connected to the liquid injection chamber (122), and the compensation chamber (124) is filled with gas.

3. The shock absorber according to claim 2, wherein, Along the radial direction of the second piston (120), the first side wall opposite to the second piston (120) is provided with a first groove (126), and / or, Along the axial direction of the second piston (120), a second groove (128) is provided on the second side wall opposite to the second piston (120); When the second piston (120) moves relative to the second working chamber (116), the first groove (126) and / or the second groove (128) are suitable for deformation.

4. The shock absorber according to claim 1, characterized in that A liquid passage hole (130) is provided on a side wall of one end of the first working chamber (112) close to the first piston chamber (106), and the first working chamber (112) is suitable for fluid communication with the first piston chamber (106) through the liquid passage hole (130).

5. The shock absorber according to claim 1, characterized in that, The damping valve group (118) comprises a hydraulic pipe (132) and a damping valve body (134); two ends of the hydraulic pipe (132) are fluidically connected to the first working chamber (112) and the second working chamber (116); and the damping valve body (134) is arranged on the hydraulic pipe (132).

6. The shock absorber according to any one of claims 1 to 5, characterized in that, The invention also comprises a mounting seat (136) and an end cover (138); the first cylinder barrel (100), the second cylinder barrel (110) and the third cylinder barrel (114) are detachably connected to at least one of the mounting seat (136) and the end cover (138); and the damping valve group (118) is connected to a side of the mounting seat (136) facing away from the first cylinder barrel (100).

7. The shock absorber according to claim 6, wherein, Sealing members are provided between the first cylinder barrel (100), the second cylinder barrel (110), and the third cylinder barrel (114) and the mounting seat (136) and the end cap (138).

8. The shock absorber according to claim 6, characterized in that, A through hole is formed in the end cap (138), a piston rod (140) is provided on the first piston (104), a part of the piston rod (140) is located in the first piston chamber (106) and another part of the piston rod (140) passes through the through hole.

9. The shock absorber according to any one of claims 1 to 5, characterized in that The first cylinder barrel (100), the second cylinder barrel (110), and the third cylinder barrel (114) are coaxially arranged.

10. A mechanical device, characterized in that, It includes a shock absorber according to any one of claims 1 to 9.

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