Shock absorber and mechanical equipment

Abstract

The shock absorber provided by the invention comprises a first sleeve, an accommodating space for arranging a first piston is formed in the first sleeve, and the first piston is suitable for dividing the first sleeve into a first piston cavity and a second piston cavity; the second sleeve is arranged on the outer side of the first sleeve in a sleeving mode, and a first cavity is defined between the side wall of the first sleeve and the side wall of the second sleeve; the third sleeve is arranged on the outer side of the second sleeve in a sleeving mode, and a second cavity is defined between the side wall of the second sleeve and the side wall of the third sleeve; the first damping valve group is in fluid communication with the first piston cavity through the first cavity, the first damping valve group is in fluid communication with the second cavity, and the first damping valve group is used for adjusting external force borne by the first piston in the first piston cavity in the first direction; the second damping valve set is in fluid communication with the second cavity and the second piston cavity and used for adjusting the external force borne by the first piston in the second piston cavity in the second direction, and the first direction is opposite to the second direction. The shock absorber can enlarge the damping adjusting range and the sensitivity.

Description

Technical Field

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

[0002] In the field of hydraulic shock absorbers, magnetorheological damping valves have received extensive attention due to their excellent characteristics of dynamically variable damping force.

[0003] Currently, in the commonly used shock absorber designs, usually only one magnetorheological damping valve is provided, and the magnetorheological damping valve can only provide a specific damping force for the liquid flow during the active compression or stretching process of the shock absorber. Although this single configuration can meet some basic shock absorption requirements, due to its limited damping force adjustment range, its application effect in complex vibration environments is limited.

[0004] In order to further improve the performance of the shock absorber, especially for vibrations with different frequencies and intensities, the engineering community urgently needs a hydraulic shock absorber that can provide a larger damping force adjustment range. Summary of the Invention

[0005] An embodiment of the present invention provides a shock absorber to solve the defect that the shock absorber in the related art cannot provide a larger damping force.

[0006] An embodiment of the present invention also provides a mechanical device.

[0007] An embodiment of the first aspect of the present invention provides a shock absorber, including: A first sleeve, an accommodation space for setting a first piston is formed inside the first sleeve, and the first piston is adapted to divide the first sleeve into a first piston chamber and a second piston chamber; A second sleeve, sleeved outside the first sleeve, and a first chamber is formed by surrounding between the side wall of the first sleeve and the side wall of the second sleeve; A third sleeve, sleeved outside the second sleeve, and a second chamber is formed by surrounding between the side wall of the second sleeve and the side wall of the third sleeve; A first damping valve group, fluidly connected to the first piston chamber through the first chamber, and the first damping valve group is also fluidly connected to the second chamber, and the first damping valve group is used to adjust the external force on the first piston in the first piston chamber in a first direction; A second damping valve group, fluidly connected to the second chamber and the second piston chamber, and the second damping valve group is used to adjust the external force on the first piston in the second piston chamber in a second direction, and the first direction is opposite to the second direction.

[0008] According to one embodiment of the present invention, a second piston is arranged in the second chamber, and the second piston is suitable for dividing the second chamber into an injection chamber and a compensation chamber. The first damping valve group and the second damping valve group are fluidically connected to the injection chamber, and the compensation chamber is filled with gas.

[0009] According to one embodiment of the present invention, along the radial direction of the second piston, the first side wall opposite to the second piston is provided with a first groove, and / or, Along the axial direction of the second piston, a second groove is provided on the opposite second side wall of the second piston; The first groove and / or the second groove are adapted to deform when the second piston moves relative to the second chamber.

[0010] According to one embodiment of the present invention, a liquid passage hole is provided on a side wall of the first chamber close to one end of the first piston chamber, and the first chamber is adapted to be in fluid communication with the first piston chamber through the liquid passage hole.

[0011] According to one embodiment of the present invention, the first damping valve group includes a first hydraulic pipe and a first damping valve body, both ends of the first hydraulic pipe are fluidically connected to the first chamber and the second chamber, and the first damping valve body is disposed in the first hydraulic pipe; The second damping valve group includes a second hydraulic pipe and a second damping valve body. Both ends of the second hydraulic pipe are fluidically connected to the second chamber and the second piston chamber. The second damping valve body is arranged in the second hydraulic pipe.

[0012] According to one embodiment of the present invention, it also includes a base and a cover body, the first sleeve, the second sleeve and the third sleeve are detachably connected to at least one of the base and the cover body, and the first damping valve group and the second damping valve group are connected to the side of the base away from the first sleeve.

[0013] According to an embodiment of the present invention, sealing members are provided between the first sleeve, the second sleeve, the third sleeve, the base, and the cover.

[0014] According to an embodiment of the present invention, a through hole is provided on the cover body, and a piston rod is provided on the first piston, a part of the piston rod is located in the first piston cavity and another part of the piston rod passes through the through hole.

[0015] According to one embodiment of the present invention, the first sleeve, the second sleeve and the third sleeve are coaxially arranged.

[0016] A second aspect of the present invention provides a mechanical device, comprising the shock absorber as described above.

[0017] According to the shock absorber provided by the first aspect embodiment of the present invention, the first damping valve group and the second damping valve group respectively control the fluid flow rate in the compression and extension directions, realizing independent adjustment of the two-way damping force, and improving the adaptability of the shock absorber to complex road conditions. The first chamber and the second chamber serve as auxiliary buffer spaces, increasing the fluid capacity, alleviating the pressure mutation during the piston movement, reducing the cavitation phenomenon, and extending the service life. The triple sleeve nested design integrates multi-stage buffering and damping functions in a limited space, and is applicable to vehicles or equipment sensitive to volume. The multi-layer sleeve structure disperses stress and reduces the risk of local fatigue; the optimized fluid circulation path reduces energy loss and improves the damping efficiency.

[0018] According to the mechanical equipment provided by the second aspect embodiment 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 equipment are reduced. This enables each component of the mechanical equipment 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 equipment and extending the service life of the mechanical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a schematic structural diagram of the shock absorber provided by the present invention.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Figure 6 It is a schematic cross-sectional view of the second piston provided by the present invention.

[0026] Reference numerals: 100, first sleeve; 102, accommodation space; 104, first piston; 106, first piston chamber; 108, second piston chamber; 110, second sleeve; 112, first chamber; 114, third sleeve; 116, second chamber; 118, first damping valve group; 120, second damping valve group; 122, second piston; 124, liquid injection chamber; 126, compensation chamber; 128, first groove; 130, second groove; 132, liquid passing hole; 134, first hydraulic pipe; 136, first damping valve body; 138, second hydraulic pipe; 140, second damping valve body; 142, base; 144, cover body; 146, piston rod. Detailed implementation manners

[0027] The following further describes in detail the implementation manners of the present invention in conjunction with the accompanying 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.

[0028] As Figures 1 to 6 shown, an embodiment of the first aspect of the present invention provides a shock absorber, including: A first sleeve 100, an accommodation space 102 for arranging a first piston 104 is formed in the first sleeve 100, and the first piston 104 is adapted to divide the first sleeve 100 into a first piston chamber 106 and a second piston chamber 108; A second sleeve 110, sleeved outside the first sleeve 100, and a first chamber 112 is formed by enclosing between the side wall of the first sleeve 100 and the side wall of the second sleeve 110; A third sleeve 114, sleeved outside the second sleeve 110, and a second chamber 116 is formed by enclosing between the side wall of the second sleeve 110 and the side wall of the third sleeve 114; A first damping valve group 118, fluidly connected to the first piston chamber 106 through the first chamber 112, and the first damping valve group 118 is also fluidly connected to the second chamber 116. The first damping valve group 118 is used to adjust the external force in the first direction received by the first piston 104 in the first piston chamber 106; A second damping valve group 120, fluidly connected to the second chamber 116 and the second piston chamber 108. The second damping valve group 120 is used to adjust the external force in the second direction received by the first piston 104 in the second piston chamber 108, and the first direction is opposite to the second direction.

[0029] The shock absorber provided by the first aspect embodiment of the present invention has a first damping valve group 118 and a second damping valve group 120 respectively controlling the fluid flow rates in the compression and extension directions, realizing independent adjustment of the two-way damping force, and enhancing the adaptability of the shock absorber to complex road conditions. The first chamber 112 and the second chamber 116 serve as auxiliary buffer spaces, increasing the fluid capacity, alleviating the pressure mutation during piston movement, reducing the cavitation phenomenon, and extending the service life. The triple sleeve nested design integrates multi-stage buffering and damping functions in a limited space, and is applicable to vehicles or equipment sensitive to volume. The multi-layer sleeve structure disperses stress and reduces the risk of local fatigue; the optimized fluid circulation path reduces energy loss and improves the damping efficiency.

[0030] Please continue to refer to Figures 1 to 6 , the shock absorber provided by the present invention adopts a triple sleeve nested structure and a two-way damping adjustment mechanism to expand the damping adjustment range and sensitivity of the shock absorber.

[0031] Specifically, an accommodation space 102 is formed inside the first sleeve 100, and a slidable first piston 104 is arranged in the accommodation space 102. The first piston 104 is used to divide the first sleeve 100 into a first piston chamber 106 (on one side of the first piston 104) and a second piston chamber 108 (on the other side of the first piston 104). When the first piston 104 moves, a damping force is generated by the fluid flow between the first piston chamber 106 and the second piston chamber 108.

[0032] The second sleeve 110 is sleeved outside the first sleeve 100, and a first chamber 112 is formed between the side wall of the second sleeve 110 and the first sleeve 100. The third sleeve 114 is sleeved outside the second sleeve 110, and a second chamber 116 is formed between the side wall of the third sleeve 114 and the second sleeve 110.

[0033] One end of the first damping valve group 118 is connected to the first chamber 112 and the first piston chamber 106, and the other end is connected to the second chamber 116. By controlling the fluid flow path among the first piston chamber 106, the first chamber 112, and the second chamber 116, the external force of the first piston 104 in the first direction (such as the compression direction) is adjusted. The second damping valve group 120 is connected to the second chamber 116 and the second piston chamber 108, and by controlling the fluid flow path between the second piston chamber 108 and the second chamber 116, the external force of the first piston 104 in the second direction (such as the extension direction) is adjusted.

[0034] It can be understood that in the embodiment of the present invention, when the first piston 104 is in the compression stroke, the first piston 104 moves in the first direction, the volume of the first piston chamber 106 decreases, and the fluid flows into the first chamber 112 and the second chamber 116 through the first damping valve group 118. The throttling effect of the first damping valve group 118 generates a compression damping force, and the second chamber 116 stores part of the fluid to balance the pressure. When the first piston 104 is in the tensile stroke, the first piston 104 moves in the second direction, the volume of the second piston chamber 108 decreases, and the fluid flows into the second chamber 116 through the second damping valve group 120. The throttling effect of the second damping valve group 120 generates a tensile damping force, and the fluid in the second chamber 116 flows back to supplement the second piston chamber 108.

[0035] According to an embodiment of the present invention, a second piston 122 is disposed in the second chamber 116. The second piston 122 is adapted to divide the second chamber 116 into a liquid injection chamber 124 and a compensation chamber 126. The first damping valve group 118 and the second damping valve group 120 are in fluid communication with the liquid injection chamber 124, and the compensation chamber 126 is filled with gas.

[0036] In an embodiment of the present invention, a second piston 122 is installed in the second chamber 116. The second piston 122 divides the second chamber 116 into an independent liquid injection chamber 124 and a compensation chamber 126. The liquid injection chamber 124 is used to accommodate the fluid medium (such as hydraulic oil, etc.) required for the operation of the shock absorber, while the compensation chamber 126 is filled with gas (such as inert gas such as nitrogen).

[0037] Both the first damping valve group 118 and the second damping valve group 120 are in fluid communication with the liquid injection chamber 124. This means that during the operation of the shock absorber, a coherent fluid circulation path is formed among the first piston chamber 106, the first chamber 112, the liquid injection chamber 124, and the second piston chamber 108. By adjusting the first damping valve group 118 and the second damping valve group 120, the flow of the fluid among these chambers is controlled.

[0038] The gas filled in the compensation chamber 126 has compressibility. When the shock absorber operates, due to the flow of the fluid and the movement of the piston, the volume of the liquid injection chamber 124 will change. At this time, the gas in the compensation chamber 126 can be compressed or expanded to adapt to the change in the volume of the liquid injection chamber 124, so as to maintain the pressure balance in the whole system.

[0039] The second piston 122 divides the second chamber 116 into a liquid injection chamber 124 and a compensation chamber 126. The gas filled in the compensation chamber 126 can effectively compensate for the volume change generated in the liquid injection chamber 124 due to the piston movement, and maintain the stability of the pressure in the system. This avoids the decline in the performance of the shock absorber caused by excessive pressure fluctuations, and improves the working stability of the shock absorber under various working conditions. The first damping valve group 118 and the second damping valve group 120 are communicated with the liquid injection chamber 124, making 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 improving the response speed and damping effect of the shock absorber.

[0040] According to an embodiment of the present invention, along the radial direction of the second piston 122, the opposite first side walls of the second piston 122 are provided with first grooves 128, and / or, along the axial direction of the second piston 122, the opposite second side walls of the second piston 122 are provided with second grooves 130; When the second piston 122 moves relative to the second chamber 116, the first grooves 128 and / or the second grooves 130 are adapted to deform.

[0041] In an embodiment of the present invention, along the radial direction of the second piston 122, first grooves 128 are provided on the opposite first side walls of the second piston 122. These first grooves 128 can be evenly distributed in multiple numbers, or can be specifically arranged according to actual needs. Along the axial direction of the second piston 122, second grooves 130 are provided on the opposite second side walls of the second piston 122. Similarly, the number and distribution of the second grooves 130 can also be adjusted according to the design requirements.

[0042] When the second piston 122 moves in the second chamber 116, for example, when it generates displacement due to the change in fluid pressure during the working process of the shock absorber, the first grooves 128 and / or the second grooves 130 will undergo corresponding deformations. This deformation is generated based on the structural characteristics of the grooves themselves and the forces received by the second piston 122 in the chamber.

[0043] The second piston 122 divides the second chamber 116 into a liquid injection chamber 124 and a compensation chamber 126. The settings of the first groove 128 and the second groove 130 do not damage the partitioning function of the second piston 122 for the chamber. At the same time, they cooperate with the first damping valve group 118, the second damping valve group 120 and the fluid circulation system of the entire shock absorber to jointly optimize the performance of the shock absorber. The first groove 128 and the second groove 130 deform when the second piston 122 moves, and can absorb and buffer part of the impact force generated by the piston movement. This enables the second piston 122 to adapt more flexibly in the face of complex pressure changes, reduce the energy loss caused by rigid collisions, and further improve the buffering performance of the shock absorber. The deformation of the first groove 128 and / or the second groove 130 will change the fluid flow path and velocity distribution around the second piston 122. To a certain extent, this change can optimize the fluid flow state in the liquid injection chamber 124 and the second chamber 116, reduce fluid resistance and turbulence phenomena, improve the working efficiency of the shock absorber, and make the fluid circulation between the chambers smoother.

[0044] According to an embodiment of the present invention, a liquid passing hole 132 is provided on the side wall of one end of the first chamber 112 close to the first piston chamber 106, and the first chamber 112 is adapted to be in fluid communication with the first piston chamber 106 through the liquid passing hole 132.

[0045] In an embodiment of the present invention, a liquid passing hole 132 is provided on the side wall of one end of the first chamber 112 close to the first piston chamber 106. Through the liquid passing hole 132, a fluid circulation path is established between the first 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 chamber 112 through the liquid passing hole 132. And the flow of this fluid cooperates with the first damping valve group 118. The first damping valve group 118 controls the entire flow process of the fluid from the first piston chamber 106 through the first chamber 112 to the second chamber 116. The setting of the liquid passing hole 132 ensures that the fluid between the first piston chamber 106 and the first chamber 112 can be smoothly exchanged, and then participates in the entire working cycle of the shock absorber and cooperates with other components to achieve the shock absorption function.

[0046] The provision of the fluid passage hole 132 provides a necessary channel for the fluid circulation between the first piston chamber 106 and the first 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 enhancing the shock absorption effect of the shock absorber. The fluid passage hole 132 cooperates with the first damping valve group 118 to jointly adjust the external force on the first piston 104 in the first piston chamber 106 in the first direction. The flow rate and velocity of the fluid passing through the fluid passage hole 132 can be controlled by the first damping valve group 118. According to different working conditions requirements, the flow of the fluid between the first piston chamber 106 and the first chamber 112 can be precisely adjusted to achieve fine adjustment of the damping force in the first direction, improving the adaptability and performance of the shock absorber.

[0047] In addition, the presence of the fluid passage hole 132 makes the pressure transmission between the first piston chamber 106 and the first 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 chamber 112 through the fluid passage hole 132, thereby causing subsequent fluid flow and damping force change. This enables the shock absorber to respond more quickly to external vibrations and provide an appropriate damping force in a timely manner, enhancing the dynamic response performance of the shock absorber.

[0048] According to an embodiment of the present invention, the first damping valve group 118 includes a first hydraulic pipe 134 and a first damping valve body 136. Both ends of the first hydraulic pipe 134 are in fluid communication with the first chamber 112 and the second chamber 116, and the first damping valve body 136 is disposed on the first hydraulic pipe 134; The second damping valve group 120 includes a second hydraulic pipe 138 and a second damping valve body 140. Both ends of the second hydraulic pipe 138 are in fluid communication with the second chamber 116 and the second piston chamber 108, and the second damping valve body 140 is disposed on the second hydraulic pipe 138.

[0049] In an embodiment of the present invention, the first damping valve group 118 is composed of a first hydraulic pipe 134 and a first damping valve body 136. Both ends of the first hydraulic pipe 134 are in fluid communication with the first chamber 112 and the second chamber 116 respectively, providing a passage for the fluid to flow between these two chambers. The first damping valve body 136 is disposed on the first hydraulic pipe 134. When the fluid flows from the first piston chamber 106 into the first chamber 112 through the liquid passing hole 132, a part of the fluid will flow through the first hydraulic pipe 134 to the second chamber 116. During this process, the first damping valve body 136 plays a key regulating role. It can control the flow rate and velocity of the fluid passing through the first hydraulic pipe 134 according to the working state of the shock absorber and the vibration conditions input externally, thereby regulating the external force in the first direction (such as the compression direction) that the first piston 104 receives in the first piston chamber 106.

[0050] The second damping valve group 120 includes a second hydraulic pipe 138 and a second damping valve body 140. Both ends of the second hydraulic pipe 138 are in fluid communication with the second chamber 116 and the second piston chamber 108 respectively, establishing a fluid passage between these two chambers. The second damping valve body 140 is installed on the second hydraulic pipe 138. When the first piston 104 moves in the second direction (such as the stretching direction) in the second piston chamber 108, the fluid pressure in the second piston chamber 108 changes, and the fluid flows into the second chamber 116 through the second hydraulic pipe 138. At this time, the second damping valve body 140 controls the flow rate and velocity of the fluid, thereby regulating the external force in the second direction that the first piston 104 receives in the second piston chamber 108, and achieving precise regulation of the damping force during the stretching stroke.

[0051] The first damping valve group 118 and the second damping valve group 120 cooperate with each other to couple and regulate the damping force of the shock absorber during the compression and stretching strokes respectively. During the entire working process of the shock absorber, through the synergistic effect of these two valve groups, the shock absorber can better adapt to different road conditions and working conditions, and effectively absorb and buffer the vibration and impact received by the vehicle or equipment during driving.

[0052] The first damping valve body 136 and the second damping valve body 140 are respectively disposed on the first hydraulic pipe 134 and the second hydraulic pipe 138, and can independently and precisely control the flow of the fluid between different chambers, thereby achieving precise regulation of the damping force during the compression and stretching strokes. Whether it is the slight vibration during low-speed driving or the severe bump during high-speed driving, the shock absorber can provide an appropriate damping force according to the actual situation, significantly improving the riding comfort and handling stability of the vehicle or equipment.

[0053] According to an embodiment of the present invention, it further includes a base 142 and a cover 144. The first sleeve 100, the second sleeve 110, and the third sleeve 114 are detachably connected to at least one of the base 142 and the cover 144. The first damping valve group 118 and the second damping valve group 120 are connected to the side of the base 142 facing away from the first sleeve 100.

[0054] In an embodiment of the present invention, the first sleeve 100, the second sleeve 110, and the third sleeve 114 are detachably connected to at least one of the base 142 and the cover 144. This detachable connection can be a threaded connection, a snap connection, or other suitable mechanical connection methods. Through this connection method, when it is necessary to repair, maintain, or replace the internal components of the shock absorber, the corresponding sleeves can be conveniently disassembled, providing convenience for subsequent operations.

[0055] The first damping valve group 118 and the second damping valve group 120 are connected to the side of the base 142 facing away from the first sleeve 100. Such a layout design makes the installation position of the damping valve group relatively independent and easy to operate. The first hydraulic pipe 134 and the first damping valve body 136 in the first damping valve group 118, and the second hydraulic pipe 138 and the second damping valve body 140 in the second damping valve group 120 are all centrally installed on this side of the base 142, which is beneficial to the arrangement and layout of the fluid pipelines, and is also convenient for inspecting and debugging the damping valve group.

[0056] The base 142 and the cover 144 cooperate with the respective sleeves and the damping valve group to jointly form the complete structure of the shock absorber. The base 142 not only plays a role in supporting and fixing each component, but also provides an installation foundation for the damping valve group; the cover 144 can enclose and protect the structure inside the first sleeve 100. When the shock absorber is working, each component works together, and through the movement of the piston in the sleeve, the flow of fluid between the chambers, and the adjustment of the damping valve group, the effective absorption and buffering of vibration are achieved.

[0057] The detachable connection between the first sleeve 100, the second sleeve 110, and the third sleeve 114 and the base 142 and the cover 144 enables the easy disassembly of relevant components when maintaining and repairing the shock absorber, facilitating the inspection of whether the internal piston, chamber, and fluid channels and other structures are damaged or faulty. For the damping valve group, since it is installed on the side of the base 142 facing away from the first sleeve 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.

[0058] According to an embodiment of the present invention, sealing members are provided between the first sleeve 100, the second sleeve 110, and the third sleeve 114 and the base 142 and the cover 144.

[0059] In an embodiment of the present invention, seals are provided between the first sleeve 100, the second sleeve 110, the third sleeve 114, the base 142, and the cover 144. Specifically, the function of these seals is to ensure good sealing at the connection parts between components and prevent the leakage of the fluid medium (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.

[0060] The provision of the seals effectively prevents the leakage of the fluid medium 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 even potentially leading 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.

[0061] According to an embodiment of the present invention, a through-hole is provided on the cover 144, a piston rod 146 is provided on the first piston 104, and a part of the piston rod 146 is located in the first piston chamber 106 and another part of the piston rod 146 passes through the through-hole.

[0062] In an embodiment of the present invention, a through-hole is provided on the cover 144, and the position of the through-hole corresponds to the position of the first piston 104 to facilitate the piston rod 146 on the first piston 104 to pass through. A piston rod 146 is provided on the first piston 104. A part of the piston rod 146 is located inside the first piston chamber 106 and moves as the first piston 104 reciprocates in the first piston chamber 106, and another part passes through the through-hole on the cover 144.

[0063] The design of the piston rod 146 passing through the through-hole of the cover 144 enables the movement of the first piston 104 in the first piston chamber 106 to be effectively transmitted to the external components that need shock absorption. When the vehicle or equipment is vibrated, the external vibration is transmitted to the first piston 104 through the piston rod 146. The first piston 104 moves in the first piston chamber 106, causing fluid flow between chambers and adjustment of the damping valve group, thereby achieving absorption and buffering of the vibration and feedback of the shock absorption effect to the external components, improving the comfort and stability of the vehicle or equipment.

[0064] According to an embodiment of the present invention, the first sleeve 100, the second sleeve 110, and the third sleeve 114 are coaxially arranged.

[0065] In one embodiment of the present invention, the central axes of the three sleeves coincide. From the inside to the outside, they are the first sleeve 100, the second sleeve 110, and the third sleeve 114 in sequence. A space for accommodating the first piston 104 is formed inside the first sleeve 100; the second sleeve 110 is sleeved outside the first sleeve 100, and a first chamber 112 is formed by enclosing between their side walls; the third sleeve 114 is further sleeved outside the second sleeve 110, and a second chamber 116 is formed between the side walls of the second sleeve 110 and the third sleeve 114. Since the three sleeves are coaxial, the structure of the entire shock absorber has good symmetry in space.

[0066] An embodiment of the second aspect of the present invention provides a mechanical device, including the shock absorber as described above.

[0067] 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, reduces the risks 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.

[0068] 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 the components that are prone to vibration in the mechanical device or at the parts that are easily affected by vibration when contacting the outside world. For example, it can be installed between the vehicle frame and the wheels in a vehicle, or between the motor and the working platform in an industrial mechanical device, 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 flow of the fluid between the chambers, and the adjustment of the damping valve group, thereby reducing the impact of the vibration on other components of the mechanical device.

[0069] 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 them; 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 recorded 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, Comprising: A first sleeve (100) having an accommodation space (102) formed therein for arranging a first piston (104), and the first piston (104) is adapted to divide the first sleeve (100) into a first piston chamber (106) and a second piston chamber (108); A second sleeve (110) sleeved outside the first sleeve (100), and a first chamber (112) is formed by enclosing between the side wall of the first sleeve (100) and the side wall of the second sleeve (110); A third sleeve (114) sleeved outside the second sleeve (110), and a second chamber (116) is formed by enclosing between the side wall of the second sleeve (110) and the side wall of the third sleeve (114); A first damping valve group (118) is in fluid communication with the first piston chamber (106) through the first chamber (112), and the first damping valve group (118) is also in fluid communication with the second chamber (116), and the first damping valve group (118) is used for adjusting the external force in the first direction received by the first piston (104) in the first piston chamber (106); A second damping valve group (120) is in fluid communication with the second chamber (116) and the second piston chamber (108), and the second damping valve group (120) is used for adjusting the external force in the second direction received by the first piston (104) in the second piston chamber (108), and the first direction is opposite to the second direction.

2. The shock absorber according to claim 1, characterized in that, A second piston (122) is arranged in the second chamber (116), and the second piston (122) is adapted to divide the second chamber (116) into a liquid injection chamber (124) and a compensation chamber (126), the first damping valve group (118) and the second damping valve group (120) are in fluid communication with the liquid injection chamber (124), and the compensation chamber (126) is filled with gas.

3. The shock absorber according to claim 2, characterized in that Along the radial direction of the second piston (122), a first groove (128) is provided on the opposite first side wall of the second piston (122), and / or Along the axial direction of the second piston (122), a second groove (130) is provided on the opposite second side wall of the second piston (122); When the second piston (122) moves relative to the second chamber (116), the first groove (128) and / or the second groove (130) is adapted to deform.

4. The shock absorber according to claim 1, characterized in that, A liquid passing hole (132) is formed on the side wall of one end of the first chamber (112) close to the first piston chamber (106), and the first chamber (112) is adapted to be in fluid communication with the first piston chamber (106) through the liquid passing hole (132).

5. The shock absorber according to claim 1, characterized in that, The first damping valve group (118) includes a first hydraulic pipe (134) and a first damping valve body (136), both ends of the first hydraulic pipe (134) are in fluid communication with the first chamber (112) and the second chamber (116), and the first damping valve body (136) is arranged on the first hydraulic pipe (134); The second damping valve group (120) comprises a second hydraulic pipe (138) and a second damping valve body (140); two ends of the second hydraulic pipe (138) are fluidically connected to the second chamber (116) and the second piston chamber (108); and the second damping valve body (140) is arranged on the second hydraulic pipe (138).

6. The shock absorber according to any one of claims 1 to 5, characterized in that, The invention also comprises a base (142) and a cover (144); the first sleeve (100), the second sleeve (110) and the third sleeve (114) are detachably connected to at least one of the base (142) and the cover (144); and the first damping valve group (118) and the second damping valve group (120) are connected to a side of the base (142) facing away from the first sleeve (100).

7. The shock absorber according to claim 6, characterized in that, A seal is provided between the first sleeve (100), the second sleeve (110) and the third sleeve (114) and the base (142) and the cover (144).

8. The shock absorber according to claim 6, characterized in that, The cover body (144) is provided with a through hole, and the first piston (104) is provided with a piston rod (146), a portion of the piston rod (146) is located in the first piston cavity (106) and another portion of the piston rod (146) passes through the through hole.

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

10. A mechanical device, characterized in that, Comprising the vibration absorber according to any one of claims 1 to 9.

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