Shock absorber and mechanical equipment

Abstract

The invention provides a shock absorber and mechanical equipment. The shock absorber comprises a shell, a piston cavity used for installing a first piston is formed in the shell, and the first piston is suitable for dividing the piston cavity into a first cavity body and a second cavity body; the compensation cavity is arranged on the periphery of the piston cavity and is in fluid communication with the second cavity; the expansion cavity is arranged between the piston cavity and the compensation cavity, and the expansion cavity is in fluid communication with the first cavity; the first channel and the second channel are in fluid communication, the first channel is in fluid communication with the first cavity, the expansion cavity and the compensation cavity, and the second channel is in fluid communication with the second cavity and the compensation cavity; the first piston is suitable for being switched between the first cavity and the second cavity, from the first cavity to the second cavity, the compression working medium enters the first cavity through the first channel and the expansion cavity, part of the compression working medium enters the compensation cavity through the first channel, from the second cavity to the first cavity, and the compression working medium enters the second cavity through the compensation cavity and the second channel. The shock absorber is good in damping shock absorption effect and high in response speed.

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] With the continuous improvement of people's requirements for vehicle comfort and stability, vehicle vibration damping technology has also advanced day by day. The traditional shock absorber is arranged between the vehicle frame and the axle, and realizes vibration damping by using the repeated flow of oil when the piston moves up and down. The friction between the oil and the hole wall and the internal friction between oil molecules together form a damping force, which converts the vibration energy of the vehicle into heat energy and dissipates it. However, the damping force of this passive shock absorber is fixed and cannot be flexibly adjusted according to driving conditions. When facing a bumpy road surface, for example, the adjustment of the damping force of the passive shock absorber is limited, and it cannot provide sufficient vibration damping effect, resulting in a poor riding experience and affecting the smooth movement of the vehicle and the comfort of passengers.

[0003] To address this challenge, a variety of advanced active vibration damping technologies have been developed in the industry. These technologies mainly design adjustment devices for adjusting the flow rate and flow volume inside the shock absorber, so that the damping force can be dynamically adjusted to a certain extent and can better adapt to the vibration conditions under different road surface conditions. For example, through an internal damping valve, the oil flow volume flowing in and out of the channel can be changed, thereby changing the magnitude of the damping force, enabling the shock absorber to more effectively suppress the vibration of the vehicle body and significantly improving the stability of the vehicle and the riding comfort of passengers.

[0004] However, the existing active vibration damping technologies still need to be further optimized and improved. Although they can dynamically adjust the damping force according to external conditions, they often have problems such as low adjustment accuracy, high energy consumption, and complex structure, which limit their wide application and further development. Therefore, developing a new type of shock absorber that can further improve the vibration damping effect, reduce energy consumption, and simplify the structure is an important research direction in the current field of vibration damping technology. 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 actively and dynamically adjust the damping.

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

[0007] The first aspect embodiment of the present invention provides a shock absorber, including: A housing, a piston cavity for installing a first piston is formed inside the housing, and the first piston is adapted to divide the piston cavity into a first chamber and a second chamber; A compensation cavity, arranged on the outer periphery of the piston cavity and in fluid communication with the second chamber; An expansion cavity is provided between the piston cavity and the compensation cavity, and the expansion cavity is in fluid communication with the first chamber; A first passage and a second passage in fluid communication, the first passage being in fluid communication with the first chamber, the expansion cavity and the compensation cavity, and the second passage being in fluid communication with the second chamber and the compensation cavity; The first piston is adapted to switch between the first chamber and the second chamber. From the first chamber to the second chamber, the compressed working medium enters the first chamber via the first passage and the expansion cavity, and part of the compressed working medium enters the compensation cavity via the first passage. From the second chamber to the first chamber, the compressed working medium enters the second chamber via the compensation cavity and the second passage.

[0008] According to an embodiment of the present invention, a middle cylinder is sleeved in the housing, and a compensation cavity is formed by surrounding between the middle cylinder and the side wall of the housing; An inner cylinder is sleeved in the middle cylinder, and an expansion cavity is formed by surrounding between the inner cylinder and the side wall of the middle cylinder, and the first piston is disposed in the inner cylinder.

[0009] According to an embodiment of the present invention, an opening is provided at one end of the inner cylinder close to the first chamber, and the expansion cavity and the first chamber are adapted to be in fluid communication through the opening.

[0010] According to an embodiment of the present invention, the first passage is in fluid communication with the inner cylinder, the middle cylinder and the first chamber respectively; the second passage is in fluid communication with the middle cylinder and the second chamber respectively.

[0011] According to an embodiment of the present invention, a second piston is disposed in the compensation cavity, and the second piston is adapted to divide the compensation cavity into a gas buffer chamber and an oil compensation chamber, and the oil compensation chamber is in fluid communication with the second passage.

[0012] According to an embodiment of the present invention, a first hydraulic component is connected to the first passage, a second hydraulic component is connected to the second passage, and a stamping component is disposed between the first hydraulic component and the second hydraulic component.

[0013] According to an embodiment of the present invention, a first damping valve is disposed on the first passage, and a second damping valve is disposed on the second passage.

[0014] According to an embodiment of the present invention, a piston rod is disposed on the first piston, and the piston rod penetrates through the first chamber; From the first chamber to the second chamber, part of the compressed working medium in the first passage enters the compensation cavity to compensate for the compressed working medium in the second chamber.

[0015] According to an embodiment of the present invention, the housing, the middle cylinder, and the inner cylinder are coaxially arranged.

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

[0017] For the shock absorber provided by the embodiment of the first aspect of the present invention, during the compression stroke, the compressed working fluid is shunted to the expansion chamber and the compensation chamber through the first passage, reducing the pressure peak in the first chamber, which is equivalent to providing a certain damping and shock absorption effect and reducing the impact feeling. During the extension stroke, the compressed working fluid in the compensation chamber is quickly replenished to the second chamber through the second passage, avoiding cavitation and improving the response speed. The design of the expansion chamber provides an additional buffer space, reducing the energy loss during the compression and expansion of the compressed working fluid and improving the shock absorption efficiency. The compensation chamber balances the pressure through bidirectional flow, ensuring that the shock absorber can still work stably under high-frequency vibration. The multi-chambers are integrated in the housing, reducing external connections and the risk of leakage. The flow path of the compressed working fluid is optimized, reducing internal wear and extending the service life. Thus, through the above settings, the shock absorber improves the active shock absorption performance and response speed of the shock absorber. This shock absorber is applicable to scenarios that require efficient shock absorption, such as automotive suspension systems and vibration isolation of industrial equipment.

[0018] For the mechanical device provided by the embodiment of the second aspect of the present invention, due to the equipped shock absorber, the mechanical device can effectively reduce the influence of vibration during operation. Whether it is the vibration generated by the operation of the mechanical device itself or the vibration interference brought by the external environment, the shock absorber can, through its internal structure and working principle, convert the vibration energy into the energy of the working fluid flow and consume it, making the operation of the mechanical device more stable, reducing problems such as component loosening and wear caused by vibration, and improving the operation stability and reliability of the mechanical device. 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 principle diagram of the shock absorber provided by the present invention.

[0021] Figure 2 It is a schematic structural diagram of the housing in the shock absorber provided by the present invention.

[0022] Figure 3 It is a schematic principle diagram of the first piston in the compression stroke provided by the present invention.

[0023] Figure 4 This is a schematic diagram of the first piston of the present invention in the extension stroke.

[0024] Reference numerals: 100, housing; 102, first piston; 104, piston chamber; 106, first chamber; 108, second chamber; 110, compensation chamber; 112, expansion chamber; 114, first passage; 116, second passage; 118, middle cylinder; 120, inner cylinder; 122, opening; 124, second piston; 126, gas buffer chamber; 128, oil compensation chamber; 130, first hydraulic component; 132, second hydraulic component; 134, stamping component; 136, first damping valve; 138, second damping valve; 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 4 shown, an embodiment of the first aspect of the present invention provides a shock absorber, including: A housing 100, within which a piston chamber 104 for installing a first piston 102 is formed, and the first piston 102 is adapted to divide the piston chamber 104 into a first chamber 106 and a second chamber 108; A compensation chamber 110, provided on the outer periphery of the piston chamber 104 and in fluid communication with the second chamber 108; An expansion chamber 112, provided between the piston chamber 104 and the compensation chamber 110, and the expansion chamber 112 is in fluid communication with the first chamber 106; A first passage 114 and a second passage 116 in fluid communication, the first passage 114 is in fluid communication with the first chamber 106, the expansion chamber 112 and the compensation chamber 110, and the second passage 116 is in fluid communication with the second chamber 108 and the compensation chamber 110; The first piston 102 is adapted to switch between the first chamber 106 and the second chamber 108. When moving from the first chamber 106 to the second chamber 108, the compressed working medium enters the first chamber 106 via the first passage 114 and the expansion chamber 112, and part of the compressed working medium enters the compensation chamber 110 via the first passage 114. When moving from the second chamber 108 to the first chamber 106, the compressed working medium enters the second chamber 108 via the compensation chamber 110 and the second passage 116.

[0027] According to the shock absorber provided by the first aspect embodiment of the present invention, during the compression stroke, the compressed working fluid is diverted through the first passage 114 to the expansion chamber 112 and the compensation chamber 110, reducing the pressure peak in the first chamber 106, which is equivalent to providing a certain damping and shock absorption effect and reducing the sense of impact. During the extension stroke, the compressed working fluid in the compensation chamber 110 is quickly replenished to the second chamber 108 through the second passage 116, avoiding cavitation and improving the response speed. The design of the expansion chamber 112 provides an additional buffer space, reducing the energy loss during the compression and expansion of the compressed working fluid and improving the shock absorption efficiency. The compensation chamber 110 balances the pressure through bidirectional flow, ensuring that the shock absorber can still work stably under high-frequency vibration. The multi-chambers are integrated within the housing 100, reducing external connections and the risk of leakage. The flow path of the compressed working fluid is optimized, reducing internal wear and extending the service life. Thus, through the above settings, the shock absorber improves the active shock absorption performance and response speed of the shock absorber. This shock absorber is applicable to scenarios such as automotive suspension systems and industrial equipment vibration isolation that require efficient shock absorption.

[0028] Please continue to refer to Figures 1 to 4 , the shock absorber provided by the embodiment of the present invention realizes the dynamic regulation of the flow of the compressed working fluid during the compression and extension strokes through the collaborative design of the multi-chambers and the fluid passages.

[0029] Specifically, a piston chamber 104 is provided inside the housing 100, and a first piston 102 is movably arranged within the piston chamber 104. Through the movement of the first piston 102, the first piston 102 divides the piston chamber 104 into a first chamber 106 and a second chamber 108. As the first piston 102 reciprocates, it drives the compressed working fluid to flow within the piston chamber 104.

[0030] The compensation chamber 110 is located outside the piston chamber 104 and communicates with the second chamber 108, and is used to store or replenish the compressed working fluid to balance the pressure. The reason for setting the compensation chamber 110 is as follows: Since the piston rod 140 occupies a part of the volume of the first chamber 106, when the first piston 102 moves downward (i.e., when the first piston 102 moves from the first chamber 106 to the second chamber 108), the actual volume of the hydraulic oil entering the second chamber 108 is smaller than the actual volume of the second chamber 108. To achieve hydraulic oil balance, during this flow process, a part of the hydraulic oil in the first passage 114 flows into the compensation chamber 110, and the other part of the hydraulic oil flows into the hydraulic pipeline through the first passage 114, thereby achieving the balance and compensation of the compressed working fluid.

[0031] The expansion chamber 112 is located between the piston chamber 104 and the compensation chamber 110, and the expansion chamber 112 also communicates with the first chamber 106, and can temporarily accommodate the compressed working fluid to buffer the impact.

[0032] The first passage 114 connects the first chamber 106, the expansion chamber 112, and the compensation chamber 110, allowing the working fluid to be diverted to the expansion chamber 112 and the compensation chamber 110 during the compression stroke. The second passage 116 connects the second chamber 108 and the compensation chamber 110, and is used for the working fluid in the compensation chamber 110 to flow back to the second chamber 108 during the expansion stroke.

[0033] It can be understood that when the first piston 102 moves from the first chamber 106 to the second chamber 108, the compressed working fluid in the first passage 114 enters the first chamber 106 through the first passage 114 and the expansion chamber 112. At the same time, part of the compressed working fluid enters the compensation chamber 110 through the first passage 114, thereby driving the first piston 102 to move from the first chamber 106 to the second chamber 108. On the contrary, when the first piston 102 moves from the second chamber 108 to the first chamber 106, the compressed working fluid in the compensation chamber 110 enters the second chamber 108 through the compensation chamber 110 and the second passage 116, thereby driving the second piston 124 to move from the second chamber 108 to the first chamber 106.

[0034] According to an embodiment of the present invention, a middle cylinder 118 is sleeved in the housing 100, and a compensation chamber 110 is formed by surrounding between the middle cylinder 118 and the side wall of the housing 100; An inner cylinder 120 is sleeved in the middle cylinder 118, and an expansion chamber 112 is formed by surrounding between the inner cylinder 120 and the side wall of the middle cylinder 118. The first piston 102 is arranged in the inner cylinder 120.

[0035] In an embodiment of the present invention, the middle cylinder 118 is nested inside the housing 100, and a compensation chamber 110 is formed between the middle cylinder 118 and the side wall of the housing 100, which is directly communicated with the second chamber 108. The inner cylinder 120 is further nested inside the middle cylinder 118, and an expansion chamber 112 is formed between the inner cylinder 120 and the side wall of the middle cylinder 118, which is communicated with the first chamber 106.

[0036] The first piston 102 is arranged in the inner cylinder 120, and the inner cavity of the inner cylinder 120 is divided into a first chamber 106 (above the piston) and a second chamber 108 (below the piston).

[0037] The first passage 114 penetrates through the inner cylinder 120 and the middle cylinder 118, connecting the first chamber 106, the expansion chamber 112, and the compensation chamber 110, allowing the working fluid to be diverted to the expansion chamber 112 and the compensation chamber 110 during the compression stroke. The second passage 116 is arranged between the middle cylinder 118 and the housing 100, connecting the second chamber 108 and the compensation chamber 110, and is used for the working fluid in the compensation chamber 110 to flow back to the second chamber 108 during the expansion stroke.

[0038] The compensation chamber 110 is located between the housing 100 and the middle cylinder 118, and is directly connected to the second chamber 108, which can quickly absorb or supplement the working fluid, reducing the risk of negative pressure (cavitation) during the extension stroke. The expansion chamber 112 is located between the middle cylinder 118 and the inner cylinder 120, and is connected to the first chamber 106, providing additional expansion space during the compression stroke, reducing the peak pressure in the first chamber 106, and enhancing the shock absorption capacity. The layered sleeve design integrates the compensation chamber 110, the expansion chamber 112, and the piston chamber 104 within the housing 100, reducing external pipeline connections and the risk of leakage.

[0039] During the compression stroke, the working fluid fills both the expansion chamber 112 and the compensation chamber 110 simultaneously through the first passage 114, achieving multi-stage buffering; during the extension stroke, the working fluid in the compensation chamber 110 quickly returns through the second passage 116 to ensure stable damping force. The layered structure reduces the radial friction during piston movement, extending the life of the shock absorber.

[0040] According to an embodiment of the present invention, an opening 122 is provided at one end of the inner cylinder 120 close to the first chamber 106, and the expansion chamber 112 and the first chamber 106 are adapted to be in fluid communication through the opening 122.

[0041] In an embodiment of the present invention, the interior of the inner cylinder 120 is divided into a first chamber 106 and a second chamber 108 by a first piston 102, and an expansion chamber 112 is formed between the outer part of the inner cylinder 120 and the middle cylinder 118. Through the opening 122 provided at one end of the inner cylinder 120 close to the first chamber 106, a fluid communication channel is established between the expansion chamber 112 and the first chamber 106. When the first piston 102 moves within the piston chamber 104, the working fluid flow generated during compression or extension can be transmitted between the first chamber 106 and the expansion chamber 112 through the opening 122. During the compression stroke, the compressed working fluid in the first chamber 106 can flow into the expansion chamber 112 through the opening 122; during the extension stroke, the working fluid in the expansion chamber 112 can also flow back into the first chamber 106 through the opening 122, thus achieving the dynamic balance of the working fluid between these two chambers.

[0042] The opening 122 provides a direct and effective channel for the working fluid flow between the first chamber 106 and the expansion chamber 112, enabling the working fluid to flexibly transfer between the two chambers according to the movement state of the piston. During the compression stroke, the pressure in the first chamber 106 increases, and the working fluid can flow into the expansion chamber 112 through the opening 122, reducing the pressure in the first chamber 106 and avoiding excessive impact caused by too high pressure; during the extension stroke, the pressure in the first chamber 106 decreases, and the working fluid in the expansion chamber 112 flows back through the opening 122 to supplement the working fluid in the first chamber 106, maintaining the normal operation of the shock absorber. The flow of the working fluid between the first chamber 106 and the expansion chamber 112 achieved through the opening 122 helps to optimize the damping characteristics of the shock absorber. Under different working conditions, the reasonable distribution and flow of the working fluid can more effectively absorb and dissipate vibration energy, improve the response ability of the shock absorber to various vibrations, thereby enhancing the overall shock absorption effect, making the vehicle or equipment more stable during driving or operation, and reducing the negative impact brought by vibrations.

[0043] According to an embodiment of the present invention, the first passage 114 is in fluid communication with the inner cylinder 120, the middle cylinder 118, and the first chamber 106 respectively; the second passage 116 is in fluid communication with the middle cylinder 118 and the second chamber 108 respectively.

[0044] In an embodiment of the present invention, the shock absorber of the present invention includes a housing 100, and a middle cylinder 118 and an inner cylinder 120 are sequentially sleeved inside the housing 100. A first piston 102 is disposed inside the inner cylinder 120, and the first piston 102 divides the inner space of the inner cylinder 120 into a first chamber 106 and a second chamber 108. The space between the middle cylinder 118 and the inner cylinder 120 forms an expansion chamber 112, and the space between the middle cylinder 118 and the housing 100 forms a compensation chamber 110.

[0045] The first passage 114 structurally realizes the fluid communication with the inner cylinder 120, the middle cylinder 118, and the first chamber 106. This means that when the first piston 102 moves in the piston chamber 104, during the compression stroke (i.e., the first piston 102 moves from the first chamber 106 to the second chamber 108), the compressed working fluid in the first chamber 106 can flow into the expansion chamber 112 through the first passage 114, and at the same time, part of the working fluid can further flow into the compensation chamber 110 through the first passage 114, thereby realizing the transfer and distribution adjustment of the working fluid between different chambers.

[0046] The second passage 116 realizes the fluid communication with the middle cylinder 118 and the second chamber 108. During the extension stroke (i.e., the first piston 102 moves from the second chamber 108 to the first chamber 106), the working fluid in the compensation chamber 110 can flow into the second chamber 108 through the second passage 116 to supplement the working fluid in the second chamber 108 to maintain the pressure balance and normal operation during the working process of the shock absorber.

[0047] The first passage 114 and the second passage 116 are designed such that the working fluid can flow along a specific path inside the shock absorber. During the compression stroke, the first passage 114 allows the working fluid to be reasonably diverted from the first chamber 106 to the expansion chamber 112 and the compensation chamber 110, avoiding excessive pressure in the first chamber 106 and playing a role in buffering and regulating pressure; during the extension stroke, the second passage 116 ensures that the working fluid in the compensation chamber 110 can flow back to the second chamber 108 in a timely manner, preventing negative pressure in the second chamber 108, optimizing the flow path of the working fluid, and improving the working efficiency of the shock absorber. Through this connection method between the passages and the chambers, the shock absorber can more effectively absorb and dissipate vibration energy. Under different working conditions, the reasonable transfer and distribution of the working fluid among the chambers adjusts the damping characteristics of the shock absorber, enabling it to better adapt to different vibration conditions, enhancing the overall shock absorption performance, and making the vehicle or equipment more stable during driving or operation.

[0048] According to an embodiment of the present invention, a second piston 124 is disposed in the compensation chamber 110. The second piston 124 is adapted to divide the compensation chamber 110 to form a gas buffer chamber 126 and an oil compensation chamber 128, and the oil compensation chamber 128 is in fluid communication with the second passage 116.

[0049] In an embodiment of the present invention, a second piston 124 is disposed in the compensation chamber 110. The second piston 124 further divides the compensation chamber 110 into two parts, namely a gas buffer chamber 126 and an oil compensation chamber 128. Among them, the gas buffer chamber 126 and the oil compensation chamber 128 are isolated from each other by the second piston 124.

[0050] The oil compensation chamber 128 is in fluid communication with the second passage 116. During the operation of the shock absorber, when the first piston 102 is in the extension stroke (moving from the second chamber 108 to the first chamber 106), the pressure in the second chamber 108 decreases. At this time, the oil in the oil compensation chamber 128 in the compensation chamber 110 can flow into the second chamber 108 through the second passage 116 to supplement the oil volume in the second chamber 108; while the gas buffer chamber 126 plays a role in buffering and regulating pressure, and the gas inside it can be compressed or expanded with the pressure change during the operation of the shock absorber, thereby regulating the pressure of the entire compensation chamber 110.

[0051] The presence of the gas buffer chamber 126 significantly enhances the buffering performance of the shock absorber. Due to the compressibility of the gas, when the shock absorber is subjected to a large impact or vibration, the gas in the gas buffer chamber 126 can be compressed, absorbing part of the energy and reducing the impact on the internal structure of the shock absorber, enabling the shock absorber to more effectively buffer and dampen vibration in the face of complex vibration conditions, and improving the ride comfort and operation stability of the vehicle or equipment.

[0052] The connection design between the oil compensation chamber 128 and the second passage 116 enables precise oil compensation for the second chamber 108 during the extension stroke. When the pressure in the second chamber 108 decreases due to piston movement, the oil in the oil compensation chamber 128 can be replenished in a timely manner, avoiding cavitation (i.e., the phenomenon of bubbles generated due to insufficient oil) in the second chamber 108, ensuring the continuous flow of oil inside the shock absorber and stable damping performance, thereby improving the working reliability and performance stability of the shock absorber.

[0053] According to an embodiment of the present invention, a first hydraulic component 130 is connected to the first passage 114, a second hydraulic component 132 is connected to the second passage 116, and a stamping component 134 is provided between the first hydraulic component 130 and the second hydraulic component 132.

[0054] In an embodiment of the present invention, a first hydraulic component 130 is connected to the first passage 114, and this component can adjust and control parameters such as the flow rate and pressure of the working medium passing through the first passage 114. Similarly, the second hydraulic component 132 connected to the second passage 116 can adjust the flow characteristics of the working medium in the second passage 116. These two hydraulic components achieve precise control of the flow of the working medium according to the working state and requirements of the shock absorber.

[0055] A stamping component 134 is provided between the first hydraulic component 130 and the second hydraulic component 132. The function of the stamping component 134 is to provide the flow power for the hydraulic oil in the first hydraulic component 130 and the second hydraulic component 132.

[0056] The settings of the first hydraulic component 130 and the second hydraulic component 132 enable precise adjustment of the flow rate and pressure of the working medium in the first passage 114 and the second passage 116 according to different working conditions and requirements. Through this precise adjustment, precise control of the damping force of the shock absorber can be achieved, enabling the shock absorber to provide appropriate damping under various driving or working conditions, and improving the comfort and stability of the vehicle or equipment.

[0057] According to an embodiment of the present invention, a first damping valve 136 is provided on the first passage 114, and a second damping valve 138 is provided on the second passage 116.

[0058] In an embodiment of the present invention, a first damping valve 136 is installed on the first passage 114, which can control the flow rate and flow resistance of the working fluid (usually oil) passing through the first passage 114. When the first piston 102 moves within the piston chamber 104, for example, during the compression stroke, as the working fluid in the first chamber 106 flows through the first passage 114 towards the expansion chamber 112 and the compensation chamber 110, the first damping valve 136 can adjust the flow rate and flow of the working fluid according to the actual working conditions. Similarly, a second damping valve 138 provided on the second passage 116 controls the flow of the working fluid in the second passage 116. During the extension stroke, when the working fluid in the compensation chamber 110 flows through the second passage 116 towards the second chamber 108, the second damping valve 138 comes into play to adjust the relevant parameters of the working fluid.

[0059] The presence of the first damping valve 136 and the second damping valve 138 enables the shock absorber to flexibly adjust the damping force according to different working states. During the compression stroke, the first damping valve 136 can increase the resistance of the working fluid passing through the first passage 114, causing more working fluid to accumulate in the first chamber 106, thereby increasing the compression damping force; during the extension stroke, the second damping valve 138 can control the flow rate of the working fluid flowing from the compensation chamber 110 to the second chamber 108, and thus adjust the extension damping force. In this way, the shock absorber can better adapt to various road conditions and driving conditions, improving the comfort and handling stability of the vehicle.

[0060] According to an embodiment of the present invention, a piston rod 140 is provided on the first piston 102, and the piston rod 140 passes through the first chamber 106; From the first chamber 106 to the second chamber 108, part of the compressed working fluid in the first passage 114 enters the compensation chamber 110 to compensate for the compressed working fluid in the second chamber 108.

[0061] In an embodiment of the present invention, when the first piston 102 moves from the first chamber 106 to the second chamber 108 (i.e., the compression stroke), the compressed working fluid flows through the first passage 114, where part of the working fluid enters the expansion chamber 112, and the other part of the working fluid enters the compensation chamber 110 through the first passage 114. This part of the compressed working fluid entering the compensation chamber 110 serves to compensate for the working fluid in the second chamber 108. Because during the compression stroke, the presence of the piston rod 140 results in the volume of the compressed working fluid entering the second chamber 108 being smaller than the volume of the second chamber 108. At this time, part of the working fluid will be extruded, and the working fluid entering the compensation chamber 110 can flow back and replenish during the subsequent extension stroke to maintain the balance and normal operation of the working fluid inside the shock absorber.

[0062] That is, during the compression stroke, the compressed working fluid in part of the first passage 114 enters the compensation chamber 110 to compensate for the working fluid in the second chamber 108, ensuring the relative stability of the total amount of working fluid inside the shock absorber. This avoids the decline in shock absorption performance caused by insufficient or excessive working fluid, ensures that the shock absorber can work properly under different strokes, and improves the working reliability and stability of the shock absorber.

[0063] According to an embodiment of the present invention, the housing 100, the middle cylinder 118, and the inner cylinder 120 are coaxially arranged.

[0064] In an embodiment of the present invention, the cross-sectional areas of the housing 100, the middle cylinder 118, and the inner cylinder 120 are all circular. Since the housing 100, the middle cylinder 118, and the inner cylinder 120 are coaxially arranged, the design and layout of the first passage 114 and the second passage 116 are smoother.

[0065] For example, the first passage 114 realizes the fluid communication between the inner cylinder 120, the middle cylinder 118, and the first chamber 106, and the second passage 116 connects the middle cylinder 118 and the second chamber 108. The coaxial structure makes the flow path of the working fluid between these chambers and passages relatively regular, reducing the flow resistance and turbulent flow phenomena that may be generated due to the non-coaxiality of the components, which is beneficial to the stable flow of the working fluid along the designed path.

[0066] The coaxial arrangement of the housing 100, the middle cylinder 118, and the inner cylinder 120 makes the overall structure of the shock absorber more symmetrical and stable. During the operation of the shock absorber, when subjected to vibrations and impacts from different directions, the coaxial structure can distribute the force more evenly, avoiding local stress concentration caused by structural asymmetry, thereby enhancing the structural strength and reliability of the shock absorber and prolonging its service life.

[0067] An embodiment of the second aspect of the present invention provides a mechanical device, including the shock absorber as described above.

[0068] According to the mechanical device provided by the embodiment of the second aspect of the present invention, due to the equipped shock absorber as described above, the mechanical device can effectively reduce the influence of vibrations during operation. Whether it is the vibration generated by the operation of the mechanical device itself or the vibration interference brought by the external environment, the shock absorber can, through its internal structure and working principle, convert the vibration energy into the energy of the working fluid flow and consume it, making the operation of the mechanical device more stable, reducing problems such as component loosening and wear caused by vibrations, and improving the operation stability and reliability of the mechanical device.

[0069] The mechanical device provided by the embodiment of the second aspect of the present invention can be an automobile, a motorcycle, a crane, etc. The mechanical device provided by the embodiment of the second aspect of the present invention can actively provide damping force for the mechanical device by setting the shock absorber as described above, thereby improving the motion smoothness of the mechanical device.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended 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 described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to 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 housing (100) having a piston chamber (104) formed therein for mounting a first piston (102), the first piston (102) being adapted to divide the piston chamber (104) into a first chamber (106) and a second chamber (108); A compensation chamber (110) provided on the outer periphery of the piston chamber (104) and in fluid communication with the second chamber (108); An expansion chamber (112) provided between the piston chamber (104) and the compensation chamber (110), the expansion chamber (112) being in fluid communication with the first chamber (106); Fluidly connected first passage (114) and second passage (116), the first passage (114) being in fluid communication with the first chamber (106), the expansion chamber (112) and the compensation chamber (110), the second passage (116) being in fluid communication with the second chamber (108) and the compensation chamber (110); The first piston (102) is adapted to switch between the first chamber (106) and the second chamber (108). From the first chamber (106) to the second chamber (108), the compressed working fluid enters the first chamber (106) via the first passage (114) and the expansion chamber (112), and part of the compressed working fluid enters the compensation chamber (110) via the first passage (114). From the second chamber (108) to the first chamber (106), the compressed working fluid enters the second chamber (108) via the compensation chamber (110) and the second passage (116).

2. The shock absorber according to claim 1, characterized in that, A middle cylinder (118) is sleeved in the housing (100), and the compensation chamber (110) is formed by surrounding between the middle cylinder (118) and the side wall of the housing (100); An inner cylinder (120) is sleeved in the middle cylinder (118), the expansion chamber (112) is formed by surrounding between the inner cylinder (120) and the side wall of the middle cylinder (118), and the first piston (102) is arranged in the inner cylinder (120).

3. The shock absorber according to claim 2, characterized in that, An opening (122) is formed at one end of the inner cylinder (120) close to the first chamber (106), and the expansion chamber (112) and the first chamber (106) are adapted to be in fluid communication through the opening (122).

4. The shock absorber according to claim 2, wherein The first passage (114) is in fluid communication with the inner cylinder (120), the middle cylinder (118) and the first chamber (106) respectively; the second passage (116) is in fluid communication with the middle cylinder (118) and the second chamber (108) respectively.

5. The shock absorber according to claim 2, characterized in that, A second piston (124) is arranged in the compensation chamber (110), the second piston (124) is adapted to divide the compensation chamber (110) into a gas buffer chamber (126) and an oil compensation chamber (128), and the oil compensation chamber (128) is in fluid communication with the second passage (116).

6. The shock absorber according to any one of claims 1 to 5, characterized in that, A first hydraulic component (130) is connected to the first passage (114), a second hydraulic component (132) is connected to the second passage (116), and a stamping component (134) is provided between the first hydraulic component (130) and the second hydraulic component (132).

7. The shock absorber according to claim 6, characterized in that, A first damping valve (136) is provided on the first passage (114), and a second damping valve (138) is provided on the second passage (116).

8. The shock absorber according to any one of claims 1 to 5, characterized in that, A piston rod (140) is provided on the first piston (102), and the piston rod (140) penetrates through the first chamber (106); From the first chamber (106) to the second chamber (108), part of the compressed working medium in the first passage (114) enters the compensation chamber (110) to compensate for the compressed working medium in the second chamber (108).

9. The shock absorber according to any one of claims 2 to 5, characterized in that, The housing (100), the middle cylinder (118), and the inner cylinder (120) 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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