An oil compensation structure and shock absorber

Abstract

This utility model discloses an oil compensation structure and a vibration damper, solving the problems of numerous parts, complex assembly, and low oil replenishment efficiency in existing compensation structures. The oil compensation structure is a modular assembly consisting of an upper connecting ring, a compensation spring, a compensation valve block, and a lower connecting ring arranged coaxially. The upper connecting ring is nested with the compensation spring via a first connecting boss, and the lower end of the spring presses against the compensation valve block with an annular valve line, thus sealing the circumferential compensation hole of the lower connecting ring under normal conditions. One end of the lower connecting ring overlaps the side of the liquid storage cylinder, and the other end is inserted into the flanged hole of the intermediate cylinder via a second connecting boss with a sealing groove. During the compression stroke, oil pressure opens the compensation valve block, allowing oil to be quickly injected into the recovery chamber through the through hole, achieving dynamic pressure balance. By replacing the multi-stage baffle structure with a four-component direct-pressure seal, the number of parts is reduced, assembly efficiency is improved, valve life is effectively extended, and product qualification rate is increased.

Description

Technical Field

[0001] This utility model belongs to the field of vibration damper technology, specifically relating to an oil compensation structure and a vibration damper. Background Technology

[0002] Shock absorbers are key components in automotive suspension systems. They primarily utilize the resistance of fluid flow or spring force to convert vibration energy into heat energy and dissipate it, thereby damping vibrations and improving vehicle comfort, stability, and safety. Electronically controlled dual-valve shock absorbers use two solenoid valves to control the compression and recovery strokes separately. Compared to single-valve shock absorbers, they offer a wider range of damping force adjustment. With the increasing demand for intelligent vehicle suspension systems, electronically controlled dual-valve shock absorbers are becoming widely used.

[0003] Currently, the movement of dual-valve shock absorbers relies solely on the solenoid valve, piston valve, and bottom valve for oil replenishment, resulting in a slow oil replenishment speed. This makes it difficult to maintain valve system balance during use, accelerating damage to the valve system and affecting the overall lifespan of the shock absorber. To achieve valve system balance more quickly, a passive valve assembly is added to the lower end of the solenoid valve to increase compensation oil passages, enabling the valve system to achieve balance faster. However, the passive valve assembly has a complex structure, many parts, occupies a large space, is complicated to assemble, and has a low pass rate. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an oil compensation structure and a vibration damper, which optimizes the structure and assembly process of the compensation valve system, simplifies the component structure, improves assembly efficiency and assembly qualification rate, reduces costs, and enables rapid oil compensation during the operation of the vibration damper, ensuring the balance of the valve system and reducing damage to the valve system.

[0005] To achieve the above and other related objectives, this utility model provides an oil compensation structure, including an upper connecting ring, a compensation spring, a compensation valve block and a lower connecting ring arranged coaxially. The lower connecting ring and the upper connecting ring are provided with through holes along the axial direction, and the upper connecting ring and the lower connecting ring are connected to form a cavity communicating with the through holes. The compensation spring and the compensation valve block are disposed in the cavity.

[0006] A first connecting boss is formed around the through hole on the inner side of the upper link ring;

[0007] One end of the compensation spring is sleeved on the outer edge of the first connecting boss and fixedly connected, while the other end abuts against the compensation valve block to press the compensation valve block tightly against the lower connecting ring.

[0008] The lower connecting ring is provided with a compensation hole, and the compensation valve block normally seals and covers the compensation hole under the preload of the compensation spring.

[0009] In an optional embodiment of this utility model, the end of the upper link ring connected to the lower link ring is recessed along the axial direction to form a first annular groove, and the lower link ring is formed with a first annular protrusion. The first annular protrusion is inserted into the first annular groove and a seal is formed by radial interference fit.

[0010] In an optional embodiment of this utility model, the end of the upper link ring away from the lower link ring is recessed along the axial direction to form a first sealing groove, and a first sealing member is embedded in the first sealing groove to seal the upper link ring and the recovery solenoid valve.

[0011] In an optional embodiment of this utility model, a second connecting boss is formed at the end of the lower connecting ring away from the upper connecting ring, and the second connecting boss is used to connect with the intermediate cylinder of the shock absorber.

[0012] In an optional embodiment of this utility model, the outer peripheral surface of the second connecting boss is radially recessed to form a second sealing groove. The second sealing groove is coaxial with the lower connecting ring, and the second sealing member is embedded in the second sealing groove to seal the lower connecting ring with the side of the intermediate cylinder.

[0013] In an optional embodiment of this utility model, one end of the compensation valve block abuts against the compensation spring, and the other end is provided with an annular valve line. The compensation valve block and the lower connecting ring form a line seal fit through the annular valve line.

[0014] In an optional embodiment of this utility model, one end of the compensation valve block connected to the compensation spring is recessed along the axial direction to form an annular positioning groove, and the compensation spring is disposed in the annular positioning groove and pressed against the compensation valve block.

[0015] In an optional embodiment of this utility model, a plurality of compensation holes are uniformly arranged circumferentially along the upper edge of the lower connecting ring.

[0016] This utility model also proposes a vibration damper, including a vibration damper body, a recovery solenoid valve, and an oil compensation structure as described in any of the above embodiments;

[0017] One end of the upper link ring is connected to the recovery solenoid valve, and the lower link ring is located at the connection hole of the liquid storage tank of the damper body, and passes through the connection hole on the liquid storage tank to be sealed and connected to the intermediate cylinder of the damper body.

[0018] In an optional embodiment of this utility model, the intermediate cylinder is provided with a flanged hole, the second connecting boss is inserted into the flanged hole, the inner wall of the flanged hole is provided with a tapered guide surface, and the guide surface and the outer wall of the second connecting boss form an assembly guide gap.

[0019] The technical advantages of this invention are as follows: By using a compensation structure for oil compensation, the oil in the dual-valve vibration damper can be compensated to the piston's recovery surface more quickly during compression, ensuring the balance of the valve system and reducing damage to the valve system. Through the coaxial integrated design of the upper connecting ring, compensation spring, compensation valve block, and lower connecting ring, functions such as guiding, sealing, and oil circuit control are integrated, eliminating the need for multi-stage passive valve assemblies to achieve oil compensation, reducing the number of parts, lowering material and processing costs, and simplifying the compensation structure and assembly process. The compensation structure requires only a single-step press-fit without multiple riveting steps, resulting in a highly efficient assembly process. Furthermore, the installation of the compensation structure and the vibration damper is simple, greatly improving product qualification rate and production line efficiency. The overall structure is simple, occupies little space, and is easy to integrate and lightweight. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a shock absorber oil compensation structure.

[0022] Figure 2 This is a schematic diagram of the overall structure of the oil compensation structure in an optional embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the assembly structure of the shock absorber in an optional embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a partial assembly structure of the shock absorber in one optional embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a partial assembly structure of the shock absorber in one optional embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the overall structure of the vibration damper in an optional embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the overall structure of the vibration damper from another perspective in an optional embodiment of the present invention.

[0028] Label Explanation:

[0029] 100. Oil compensation structure; 200. Shock absorber body; 300. Restoration solenoid valve; 400. Compression solenoid valve;

[0030] 110. Upper connecting ring; 120. Lower connecting ring; 130. Compensating spring; 140. Compensating valve block;

[0031] 111. First connecting boss; 112. First sealing groove; 113. First annular groove;

[0032] 121. Compensation hole; 122. First annular protrusion; 123. Second connecting boss; 124. Second sealing groove;

[0033] 141. Annular valve line; 142. Annular positioning groove;

[0034] 210. Liquid storage tank; 220. Intermediate cylinder; 230. Working cylinder; 240. Piston valve; 250. Bottom valve;

[0035] 211. Liquid storage chamber; 221. Flanged hole; 222. Upper chamber of intermediate cylinder; 223. Lower chamber of intermediate cylinder; 224. Upper section of intermediate cylinder; 225. Connecting section of intermediate cylinder; 226. Lower section of intermediate cylinder; 231. Restoration chamber; 232. Compression chamber. Detailed Implementation

[0036] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] Current electronically controlled dual-valve vibration dampers generally employ dual solenoid valves to independently control the compression and recovery strokes. The valve system's hydraulic compensation relies on an upper and lower oil supply mechanism between the piston valve and the bottom valve, resulting in low compensation rates and difficulties in maintaining dynamic balance. Existing improvement solutions enhance compensation efficiency by adding a passive valve assembly at the lower end of the solenoid valve. However, the passive valve assembly, due to its multi-stage structure, involves numerous parts, complex assembly processes, and difficulties in controlling the coaxiality of the compensation valve assembly during assembly, impacting product yield and service life. Figure 1The diagram shows a compensation valve system with an oil compensation structure. During installation, the clamping valve block 10, lower compensation valve block 20, lower connecting ring 30, and compensation spring 40 need to be riveted together using tooling, and then the connecting ring 50 is press-fitted on. During press-fitting, the coaxiality of the three components must be ensured. The press-fitting process is complex, the parts are difficult to machine, and the cost is high. Furthermore, assembly misalignment can easily lead to unstable oil sealing, making it difficult to meet mass production requirements. Therefore, there is an urgent need for an oil compensation solution that is simple in structure, reliable in sealing, and adaptable to efficient assembly.

[0039] Please see Figures 2 to 5 This invention proposes an oil compensation structure for use in a shock absorber to achieve oil compensation. One end of the oil compensation structure 100 is connected to a recovery solenoid valve 300, and the other end is connected to the shock absorber body 200, forming a compensation circuit that enables rapid oil compensation during compression. The oil compensation structure 100 consists of an upper connecting ring 110, a lower connecting ring 120, a compensation spring 130, and a compensation valve block 140 arranged coaxially. The upper connecting ring 110 and the lower connecting ring 120 have through holes along the axial direction, and the upper and lower connecting rings are connected to form a cavity communicating with the through holes. The compensation spring 130 and the compensation valve block 140 are disposed within the cavity. The recovery solenoid valve 300 communicates with the internal chamber of the shock absorber through this connection structure. The closing and opening of the compensation oil circuit is achieved through the cooperation of the compensation spring 130 and the compensation valve block 140. The compensation spring 130 is connected to the upper connecting ring 110 and presses the compensation valve block 140 onto the lower connecting ring 120. The lower connecting ring 120 has a compensation hole 121. Under the preload of the compensation spring 130, the compensation valve block 140 normally seals and covers the compensation hole 121 to close the compensation oil circuit. When the compensation valve block 140 is opened, the compensation oil circuit is opened to realize oil compensation.

[0040] Please see Figures 2 to 5 During the shock absorber's recovery stroke, the compression of the compensation valve block 140 by the compensation spring 130 can seal the compensation hole 121, ensuring that the shock absorber can quickly build up pressure during the recovery phase, ensuring that the damping force of the shock absorber reaches the required value, and achieving the purpose of vibration reduction. During the shock absorber's compression stroke, the change in oil pressure, in conjunction with the compensation spring 130, lifts the compensation valve block 140 and ensures that the compensation valve block 140 is subjected to uniform force, so that the compensation hole 121 opens and connects with the cavity and the through hole on the connecting ring, opening the compensation oil circuit for efficient oil compensation. The oil compensation structure 100 has a simple overall structure, few parts, and is easy to process. The structure can be integrated by the integrated pressing of the double connecting rings, the assembly process is simple, effectively reducing costs and facilitating mass production.

[0041] Please see Figures 2 to 5Within the damper body 200, a storage chamber 211 is formed between the liquid reservoir 210 and the intermediate cylinder 220. An upper intermediate cylinder chamber 222 and a lower intermediate cylinder chamber 223 are formed between the intermediate cylinder 220 and the working cylinder 230, respectively. Within the working cylinder 230, a recovery chamber 231 and a compression chamber 232 are formed on both sides by a piston valve 240. The upper intermediate cylinder chamber 222 is connected to the recovery chamber 231, and the lower intermediate cylinder chamber 223 is connected to the compression chamber 232. A connection hole is provided on the liquid reservoir 210 for installing a solenoid valve. The recovery solenoid valve 300 is installed on one side of the recovery chamber 231 and is connected to the recovery chamber 231 through the oil compensation structure 100. The compression solenoid valve 400 is installed on one side of the compression chamber 232 and is connected to the compression chamber 232 through a connecting ring.

[0042] During the compression stroke of the shock absorber, the oil pressure on the compression chamber 232 side of the piston valve 240 continuously increases. Part of the oil flows through the bottom valve 250 and the channel in the piston valve 240 into the reservoir 210 and the reservoir 211 of the intermediate cylinder 220, as well as the recovery chamber 231 on one side of the piston valve 240. The other part enters the lower chamber 223 of the intermediate cylinder through the through hole on the working cylinder 230, and then flows into the reservoir 211 between the reservoir 210 and the intermediate cylinder 220 through the compression solenoid valve 400 at the lower end. During the compression process, the piston valve 240 moves towards the bottom valve 250 side, and the oil in the lower chamber 223 of the intermediate cylinder continuously increases and flows into the reservoir 211, thereby pushing open the compensation valve block 140 on the compensation hole 121. The oil enters the cavity of the connecting ring through the compensation hole 121 and flows out quickly through the through hole into the upper chamber 222 of the intermediate cylinder, further compensating to the recovery chamber 231, thus realizing oil compensation.

[0043] Please see Figures 2 to 5 In an optional embodiment of this utility model, a first connecting boss 111 is formed around the through hole on the inner side of the upper connecting ring 110; one end of the compensating spring 130 is sleeved on the outer edge of the first connecting boss 111 and fixedly connected. Specifically, the compensating spring 130 and the first connecting boss 111 are fixed by a small interference fit, and the other end abuts against the compensating valve block 140 and presses it against the inner end face of the lower connecting ring 120. Under the preload of the compensating spring 130, the compensating valve block 140 normally seals and covers the compensating hole 121. During the assembly process, the inner diameter of the first connecting boss 111 inside the upper connecting ring 110 is used to guide the installation of the compensating spring 130, and the coaxial installation is ensured by interference nesting. The overall assembly can be completed by pressing the upper connecting ring 110 and the lower connecting ring 120 in one step. The installation process is simpler, easier to operate, has a high assembly qualification rate, is less prone to assembly deviation, can ensure uniform force on the compensating valve block 140, and can ensure a good seal.

[0044] Please see Figures 2 to 5In one optional embodiment of this utility model, the end of the upper connecting ring 110 away from the lower connecting ring 120 is axially recessed to form a first sealing groove 112. A first sealing element is embedded in the first sealing groove 112 to seal the upper connecting ring 110 and the recovery solenoid valve 300. The sealing element is designed to accommodate tolerance fluctuations at the solenoid valve interface, and the first sealing element compensates for assembly deviations, ensuring that the high-pressure oil does not leak. The first sealing element can be, for example, an O-ring. The sealing connection between the upper connecting ring 110 and the recovery solenoid valve 300 is achieved by tightening the O-ring. In other embodiments, an annular valve line 141 can also be provided on the connection end face between the upper connecting ring 110 and the recovery solenoid valve 300 to achieve sealing.

[0045] Please see Figures 2 to 5 In an optional embodiment of this utility model, a first annular groove 113 is formed axially at one end where the upper connecting ring 110 and the lower connecting ring 120 are connected. A corresponding first annular protrusion 122 is formed on the lower connecting ring 120. The first annular protrusion 122 and the first annular groove 113 are inserted into each other and sealed by radial interference fit. Utilizing the concave-convex fit structure, the upper connecting ring 110 is press-fitted onto the lower connecting ring 120. The interference fit achieves self-centering, preventing displacement of the connecting ring during press-fitting, ensuring precise alignment, guaranteeing coaxiality of the assembly, avoiding uneven force on the valve block leading to uneven wear or seal failure, simplifying the assembly and positioning process, and enhancing the torsional strength of the connection structure. No additional sealing components are required. The radial interference fit simultaneously achieves axial positioning and cavity sealing, resulting in a simple structure. It is understood that the mating structure of the upper connecting ring 110 and the lower connecting ring 120 is not limited, as long as it can be sealed. In other embodiments, the upper connecting ring 110 can also be a ring structure, and an annular protrusion is formed on the lower connecting ring 120 along the axial direction. The installation is achieved by the interference fit between the inner circumference of the upper connecting ring 110 and the outer circumference of the annular protrusion, which reduces the concave and convex structure on the connecting ring and improves the part processing efficiency.

[0046] Please see Figures 2 to 5 In an optional embodiment of this utility model, one end of the lower connecting ring 120 is connected to the upper connecting ring 110, forming a cavity inside the connecting ring and overlapping the side of the liquid storage cylinder 210 to ensure the overall stability of the oil compensation structure 100 connection; the other end forms a second connecting boss 123 for connecting to the intermediate cylinder 220 of the shock absorber. The through hole in the center of the lower connecting ring 120 can communicate with the upper cavity 222 of the intermediate cylinder. The oil that enters the cavity through the compensation hole 121 will enter the upper cavity 222 of the intermediate cylinder through the through hole and further enter the recovery cavity 231 to achieve oil compensation.

[0047] Please see Figures 2 to 5In one optional embodiment of this utility model, the outer peripheral surface of the second connecting boss 123 is radially recessed to form a second sealing groove 124. The second sealing groove 124 is coaxial with the lower connecting ring 120, and the second sealing element is embedded in the second sealing groove 124 to seal the lower connecting ring 120 and the flanged hole 221. The second sealing groove 124 is, for example, a U-shaped groove, and the second sealing element is an O-ring, which is assembled in the sealing groove. The O-ring and the inner wall of the flanged hole 221 form a radial compression seal, which adapts to oil pressure fluctuations, avoids leakage of compensating oil from the connection gap, ensures the stability of the oil circuit, and the independent sealing element is easy to replace, reducing maintenance costs. The radial sealing force is evenly distributed, avoiding sealing failure caused by long-term vibration. In other embodiments, the outer peripheral surface of the lower connecting ring 120 can also be treated with rubber vulcanization, and the vulcanized rubber can be press-fitted with the intermediate cylinder 220 to achieve the purpose of sealing. This method is simple to process and improves sealing reliability and environmental adaptability.

[0048] Please see Figures 2 to 5 In an optional embodiment of this utility model, a plurality of compensation holes 121 are uniformly arranged circumferentially on the lower connecting ring 120. The inner side of the compensation hole 121 communicates with the internal cavity of the connecting ring. Under normal conditions, the orifice is covered by the compensation valve block 140 to achieve a good seal, so as to ensure that the damper can quickly build up pressure during the recovery stage and achieve vibration reduction. During the compression stroke of the damper, the compensation hole 121 is opened under the action of oil pressure. Through the cooperation of the multiple compensation holes 121 with the cavity and the through hole on the connecting ring, the oil can be quickly compensated to the recovery cavity 231, ensuring the balance of the valve system and reducing the damage to the valve system. The multiple compensation holes 121 are evenly arranged around the circumference, which can maintain the sealing pressure threshold at the beginning of the compression stroke, balance the oil pressure distribution, reduce the flow load of a single hole, and prevent the valve plate from vibrating at high frequency. It can be understood that the shape and number of compensation holes 121 are not limited, and the orifice diameter or number can be adjusted according to the working conditions to flexibly match different damping force characteristics.

[0049] Please see Figures 2 to 5In an optional embodiment of this utility model, one end of the compensating valve block 140 abuts against the compensating spring 130, and the other end is provided with an annular valve line 141. The center of the compensating valve block 140 is provided with a through hole communicating with the lower connecting ring 120 and the cavity to facilitate the flow of oil. The compensating valve block 140 is placed inside the lower connecting ring 120. After the upper connecting ring 110 and the lower connecting ring 120 are press-fitted, the compensating spring 130 is initially in a compressed state. Under the preload of the compensating spring 130, the compensating valve block 140 is tightly attached to the inner end face of the lower connecting ring 120, and a line seal is formed through the annular valve line 141. The cooperation between the compensating spring 130 and the compensating valve block 140 ensures a good seal. Under the spring pressure, the compensating valve block 140 is evenly attached to the valve line to avoid stress concentration at a single point. Utilizing a valve line sealing structure, the spring preload during the damper's recovery stroke causes the valve block to reset and seal, preventing oil backflow. During the compression stroke, oil pressure overcomes the spring preload, quickly opening the compensation valve block 140 and thus the compensation orifice 121 to activate the compensation oil circuit. The oil compensation structure 100 then rapidly compensates the oil to the piston's recovery chamber, reducing damage to the valve system. This dynamic sealing mechanism balances sealing reliability and compensation response speed. In other embodiments, the annular valve line 141 can also be located on the side where the lower connecting ring 120 connects to the compensation valve block 140.

[0050] Please see Figures 2 to 5 In an optional embodiment of this utility model, the compensating valve block 140 and the lower connecting ring 120 are coaxially arranged and clearance-fitted to limit the radial displacement of the valve plate, ensure the dynamic stability of the valve plate, ensure that the sealing surface is always aligned, and extend the service life of the valve plate. One end of the compensating valve block 140 connected to the compensating spring 130 is axially recessed to form an annular positioning groove 142. The compensating spring 130 is disposed in the annular positioning groove 142 and pressed against the compensating valve block 140. One end of the compensating spring 130 is connected to the upper connecting ring 110, and the other end is connected to the compensating valve block 140. Under the force of the compensating spring 130, the compensating valve block 140 and the lower connecting ring 120 are pressed tightly together for sealing. When the compensating valve block 140 is pushed open under oil pressure, the compensating spring 130 is compressed. The positioning groove prevents the spring from sliding laterally, ensuring that the preload acts perpendicularly on the center of the compensating valve block 140, ensuring uniform force on the compensating valve block 140, and ensuring the stability of the oil compensation process. The design of the annular positioning groove 142 increases the effective stroke of the compensation spring 130 and provides a larger adjustable space for the valve block opening force, etc. By adjusting the preload and stiffness coefficient of the compensation spring 130, the response speed of the oil compensation can be adjusted in multiple stages.

[0051] Please see Figures 2 to 5In an optional embodiment of this utility model, one end of the compensation spring 130 is interference-fitted to the first connecting boss 111, and the other end is set in the annular positioning groove 142 of the compensation valve block 140. After the compensation spring 130 and the upper connecting ring 110 are coaxially installed, when the upper connecting ring 110 and the lower connecting ring 120 are press-fitted into one piece, the coaxiality of each component can be ensured by the mating structure, which simplifies the assembly process, ensures accurate installation, improves the product qualification rate, and facilitates mass production.

[0052] Please see Figures 2 to 5 When installing the oil compensation structure 100, firstly, the compensation spring 130 is coaxially fitted with the upper connecting ring 110 and interference-fitted into the first connecting boss 111. The compensation valve block 140 is coaxially fitted with the lower connecting ring 120 and placed on the lower connecting ring 120. Then, the upper connecting ring 110 and the lower connecting ring 120 are pressed together as one unit. The internal compensation spring 130 and the compensation valve block 140 are pressed together, thus completing the installation of the oil compensation structure 100. By pressing the fitting structure together once, good coaxiality of each component can be ensured, achieving a better sealing effect. The overall structure is simple, the assembly is simple, the processing and assembly costs are low, and the pass rate is higher. It ensures that the oil can compensate to the piston's recovery surface more quickly during the process of the dual-valve shock absorber, ensuring the balance of the valve system and reducing damage to the valve system. The modular design of the components replaces the multi-stage baffle structure, which simplifies the connection structure and assembly process. The compensation spring 130 is pre-tightened by direct pressure to achieve a normally closed seal. During the compression stroke, the oil pressure can open the compensation valve block 140 to achieve rapid oil replenishment, which significantly improves the dynamic balance capability of the valve system.

[0053] Please see Figures 2 to 7 This utility model also proposes a vibration damper, which includes an oil compensation structure 100 as described in any of the above embodiments, a vibration damper body 200, a recovery solenoid valve 300, and a compression solenoid valve 400. The vibration damper body 200 includes a reservoir 210, an intermediate cylinder 220, a working cylinder 230, and a piston valve 240. One end of an upper connecting ring 110 is connected to the recovery solenoid valve 300, and a lower connecting ring 120 is disposed at the connection hole of the reservoir 210 of the vibration damper body 200, and passes through the connection hole on the reservoir 210 to form a sealed connection with the intermediate cylinder 220 of the vibration damper body 200.

[0054] Please see Figures 2 to 7In an optional embodiment of this utility model, a storage chamber 211 is formed between the storage cylinder 210 and the intermediate cylinder 220; the intermediate cylinder 220 includes an upper section 224, a connecting section 225, and a lower section 226. After the upper section 224, the connecting section 225, and the lower section 226 are press-fitted together, they are further press-fitted with the working cylinder 230. A seal is ensured by a sealing element such as an O-ring, and an upper cavity 222 and a lower cavity 226 of the intermediate cylinder are formed between the intermediate cylinder 220 and the working cylinder 230, which are mutually isolated. 23. The piston valve 240 is located inside the working cylinder 230, with a compression chamber 232 and a recovery chamber 231 formed on both sides. The compression chamber 232 is located on the side closer to the bottom valve 250. The upper chamber 222 of the intermediate cylinder is connected to the recovery chamber 231, and the lower chamber 223 of the intermediate cylinder is connected to the compression chamber 232. The liquid storage cylinder 210 is provided with a connection hole to facilitate the installation of the connecting ring and the solenoid valve. The recovery solenoid valve 300 is connected to the recovery chamber 231 through the oil compensation structure 100, and the compression solenoid valve 400 is connected to the compression chamber 232 through the connecting ring.

[0055] Please see Figures 2 to 7 In an optional embodiment of this utility model, the intermediate cylinder 220 is provided with a flanged hole 221. One end of the lower connecting ring 120 overlaps with the liquid storage cylinder 210, and the second connecting boss 123 at the other end is inserted into the flanged hole 221, and a side seal is achieved by a sealing element. The through hole in the center of the lower connecting ring 120 can communicate with the lower cavity 223 of the intermediate cylinder. The oil that enters the cavity through the compensation hole 121 will enter the lower cavity 223 of the intermediate cylinder through the through hole, and further enter the recovery cavity 231 to achieve oil compensation.

[0056] Please see Figures 2 to 7 In an optional embodiment of this utility model, the edge of the connecting hole on the side of the liquid storage cylinder 210 is machined with a stepped surface. One end of the lower connecting ring 120 overlaps with the stepped surface, and the other end passes through the connecting hole and is inserted into the flanged hole 221 of the intermediate cylinder 220. The end face of the liquid storage cylinder 210 is used as an axial positioning reference to constrain the assembly position of the lower connecting ring 120. The flanged hole 221 provides radial support, restricts the circumferential displacement of the lower connecting ring 120, ensures the precise alignment of the through hole and the upper cavity 222 of the intermediate cylinder, optimizes the smoothness of the oil compensation path, and simplifies the assembly process of the intermediate cylinder 220 and the compensation structure by plugging in the connection. This reduces the machining accuracy requirements, facilitates installation and observation of the correctness of the installation, improves the assembly cycle, and further improves the production line efficiency.

[0057] Please see Figures 2 to 7In an optional embodiment of this utility model, the inner wall of the flanged hole 221 is also provided with a tapered guide surface. The guide surface and the outer wall of the second connecting boss 123 form an assembly guide gap for installation. The guide surface guides the centering insertion, solves the coaxiality deviation problem during installation, reduces the difficulty of assembly alignment, avoids assembly jamming, improves assembly efficiency, and effectively avoids shear damage to the sealing ring caused by hole shaft misalignment during assembly, further improving assembly efficiency and yield.

[0058] Please see Figures 2 to 7 During the shock absorber's recovery stroke, piston valve 240 moves away from bottom valve 250. At this time, compensation spring 130 presses compensation valve block 140 to close compensation hole 121, ensuring a good seal. Oil flows through the solenoid valve control channel, quickly building up damping pressure to ensure the shock absorber's damping force reaches the required value, thus achieving vibration reduction. The damping force can be adjusted by regulating the solenoid valve. During the shock absorber's compression stroke, piston valve 240 moves closer to bottom valve 250. At this time, the oil pressure on the compression chamber 232 side of piston valve 240 continuously increases, and part of the oil flows through bottom valve 250. The oil flows into the reservoir chamber 211 and the recovery chamber 231 via the paths on piston valve 240 and piston valve 240, respectively. Another portion enters the lower chamber 223 of the intermediate cylinder and then flows into the reservoir chamber 211 through the compression solenoid valve 400 on that side. During compression, the oil pressure continuously increases, overcoming the spring preload and pushing open the compensation valve block 140. After the compensation hole 121 opens, the oil enters the cavity and quickly flows into the upper chamber 222 of the intermediate cylinder through the through hole of the lower connecting ring 120, further compensating the pressure in the recovery chamber 231, shortening the pressure balance time. At the end of the stroke, the spring returns to its original position, causing the compensation valve block 140 to reseal the compensation hole 121. Through a simplified coaxial valve system and dynamic sealing design, efficient oil compensation is achieved, reducing valve system pressure fluctuations and valve system impact noise, effectively extending the life of the solenoid valve.

[0059] In summary, in the oil compensation structure and shock absorber of this utility model, through the installation of the oil compensation structure 100, the oil can more quickly compensate to the piston's restoring surface during the compression stroke of the shock absorber, ensuring the balance of the valve system, reducing damage to the valve system, and effectively extending the valve system's lifespan. The oil compensation structure 100 adopts a coaxial design to simplify the structure, replaces the multi-stage baffle structure with a four-component direct-pressure seal, and achieves structural integration through the integrated press-fitting of the double connecting rings, reducing the number of parts and improving assembly efficiency. The boss and other mating structures ensure good coaxiality during installation, and the compensation spring 130 cooperates with the sealing seal to achieve dynamic sealing. The liquid seal ensures stable vibration reduction performance during the recovery phase. The flexible structure optimizes the dynamic compensation performance of the oil. The overall structure is simple, with fewer parts that are easy to process and assemble, reducing manufacturing costs and improving assembly qualification rate. This improves the product qualification rate during assembly and can meet mass production requirements. The oil compensation structure 100 has a simple structure and occupies little space, facilitating integration and lightweight design. The oil compensation structure 100 can be installed with the damper body by using the insertion fit of the flanged hole 221 and the connecting boss, which facilitates installation and observation of installation correctness, improves assembly cycle time, and further improves production line efficiency.

[0060] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0061] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0062] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0063] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0064] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0065] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0066] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0067] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0068] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. An oil compensation structure characterized by comprising: The device includes an upper connecting ring, a compensating spring, a compensating valve block, and a lower connecting ring arranged coaxially. The lower connecting ring and the upper connecting ring are provided with through holes along the axial direction, and the upper connecting ring and the lower connecting ring are connected to form a cavity communicating with the through holes. The compensating spring and the compensating valve block are disposed in the cavity. A first connecting boss is formed around the through hole on the inner side of the upper link ring; One end of the compensation spring is sleeved on the outer edge of the first connecting boss and fixedly connected, while the other end abuts against the compensation valve block to press the compensation valve block tightly against the lower connecting ring. The lower connecting ring has a compensation hole. The compensation valve block normally seals and covers the compensation hole under the preload of the compensation spring. One end of the compensation valve block connected to the compensation spring is recessed along the axial direction to form an annular positioning groove. The compensation spring is set in the annular positioning groove and pressed against the compensation valve block.

2. The oil compensation structure according to claim 1, characterized by, The upper link ring and the lower link ring are connected at one end with a first annular groove recessed along the axial direction. The lower link ring has a first annular protrusion. The first annular protrusion is inserted into the first annular groove and a seal is formed by radial interference fit.

3. The oil compensation structure according to claim 1, characterized by, The end of the upper link ring away from the lower link ring is recessed along the axial direction to form a first sealing groove, and the first sealing element is embedded in the first sealing groove to seal the upper link ring and the restoration solenoid valve.

4. The oil compensation structure according to claim 1, characterized by, The lower link ring has a second connecting boss at the end away from the upper link ring, and the second connecting boss is used to connect with the intermediate cylinder of the shock absorber.

5. The oil compensation structure according to claim 4, characterized by, The outer peripheral surface of the second connecting boss is radially recessed to form a second sealing groove. The second sealing groove is coaxial with the lower connecting ring. The second sealing element is embedded in the second sealing groove to seal the lower connecting ring with the side of the intermediate cylinder.

6. The oil compensation structure according to claim 1, wherein One end of the compensation valve block abuts against the compensation spring, and the other end is provided with an annular valve line. The compensation valve block and the lower connecting ring form a line seal fit through the annular valve line.

7. The oil compensation structure according to claim 1, wherein The lower connecting ring is provided with a plurality of compensation holes evenly distributed circumferentially along its upper edge.

8. A damper characterized by Includes a shock absorber body, a recovery solenoid valve, and an oil compensation structure as described in any one of claims 1 to 7; One end of the upper link ring is connected to the recovery solenoid valve, and the lower link ring is located at the connection hole of the liquid storage tank of the damper body, and passes through the connection hole on the liquid storage tank to be sealed and connected to the intermediate cylinder of the damper body.

9. The damper of claim 8, wherein The intermediate cylinder is provided with a flanged hole, and the second connecting boss is inserted into the flanged hole. The inner wall of the flanged hole is provided with a tapered guide surface, and the guide surface and the outer wall of the second connecting boss form an assembly guide gap.

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