A shock absorber

Abstract

The application provides a shock absorber, which comprises a piston assembly, a first adjusting valve, a second adjusting valve, a first cylinder, a second cylinder and a third cylinder arranged from inside to outside, the piston assembly is movably arranged in the first cylinder and abuts against the inner wall of the first cylinder to divide the first cylinder into a first inner cavity part and a second inner cavity part, the first inner cavity part is provided with a first oil passing hole communicated with the second cylinder, the second inner cavity part is provided with a second oil passing hole, the first adjusting valve comprises a valve body and a valve core, the valve body is formed with a first channel, a second channel and a third channel communicated in sequence, the first channel is communicated with the second oil passing hole, the third channel is communicated with the second cylinder, the valve core is located in the second channel and is used for moving to adjust the conduction degree of the second channel under the action of external force, and the second adjusting valve is communicated with the second inner cavity part and the third cylinder respectively, and is used for adjusting the conduction degree of the second inner cavity part and the third cylinder. The application improves the response speed of the shock absorber.

Description

Technical Field

[0001] This application relates to the field of vehicle suspension system technology, specifically to a shock absorber. Background Technology

[0002] In automotive engineering, the performance of the suspension system directly affects a vehicle's ride comfort (smoothness) and dynamic handling (stability). Among these, the shock absorber, as the core damping element of the suspension, plays a decisive role in its performance. Currently, the basic principle of mainstream hydraulic shock absorbers is to use a special fluid as the working medium. When the piston moves within the cylinder, it forces the fluid to flow through pre-set throttle orifices or valve systems. Damping force is generated through the viscous resistance of the fluid. This process essentially irreversibly converts the mechanical energy of vibrations absorbed by the vehicle body into heat energy, which is then dissipated, effectively suppressing the reciprocating oscillations of the springs and absorbing impacts from the road surface.

[0003] However, when dealing with high-frequency, low-amplitude minor road vibrations, this widely used telescopic shock absorber cannot achieve instantaneous and precise flow regulation and pressure build-up of the fluid, resulting in a lag in damping force generation. The direct consequence is that the shock absorber's filtering capacity for high-frequency inputs is insufficient, and the feedback transmitted to the vehicle body is not clear enough, making the road feel perceived by the driver vague and, to some extent, weakening the precise handling experience of the vehicle. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides a shock absorber.

[0005] The specific technical solution is as follows:

[0006] A shock absorber includes a piston assembly, a first regulating valve, a second regulating valve, and a first cylinder, a second cylinder, and a third cylinder arranged sequentially from the inside to the outside. The piston assembly is movably disposed in the first cylinder and abuts against the inner wall of the first cylinder to divide the first cylinder into a first inner cavity and a second inner cavity.

[0007] The first inner cavity is provided with a first oil passage hole, and the first inner cavity is connected to the second cylinder body through the first oil passage hole. The second inner cavity is provided with a second oil passage hole. The first regulating valve includes a valve body and a valve core. The valve body forms a first channel, a second channel, and a third channel that are connected in sequence. The first channel is connected to the second oil passage hole, and the third channel is connected to the second cylinder body. The valve core is located in the second channel and is used to move under the action of external force to adjust the conductivity of the second channel. The second regulating valve is connected to the second inner cavity and the third cylinder body respectively, and the second regulating valve is used to adjust the conductivity of the second inner cavity and the third cylinder body.

[0008] In one embodiment, the third cylinder sidewall is provided with a first mounting hole, the second cylinder sidewall is provided with a second mounting hole, and the first regulating valve passes through the first mounting hole and the second mounting hole in sequence and then abuts against the first cylinder sidewall, so that the first channel communicates with the second oil passage hole.

[0009] In one embodiment, the end wall of the valve body abuts against the side wall of the first cylinder body, the first channel protrudes from the end wall of the valve body and communicates with the second oil passage, and the third channel protrudes from the side wall of the valve body and communicates with the second cylinder body;

[0010] The third channel has a first distance between its opening and the side wall of the first cylinder, and the ratio of the first distance to the total length of the first regulating valve is less than 40%.

[0011] In one embodiment, the opening of the third channel extends from the side wall of the valve body to the end wall of the valve body, and the third channel exposes both the side wall and the end wall of the valve body.

[0012] In one embodiment, the end wall of the valve body includes a first end wall and a second end wall, the first end wall being connected to the side wall of the valve body, and the second end wall being disposed on the first end wall to form a stepped end wall;

[0013] The second end wall abuts against the side wall of the first cylinder body, the first channel is exposed above the second end wall and communicates with the second oil passage, a gap is formed between the first end wall and the side wall of the first cylinder body, and the third channel is exposed above at least one of the first end wall and the side wall of the valve body and communicates with the second cylinder body.

[0014] In one embodiment, the valve body's end wall further includes at least one third end wall located between the first end wall and the second end wall to form a multi-step end wall.

[0015] In one embodiment, the end wall of the valve body has an arcuate surface, the arcuate surface abuts against the side wall of the first cylinder body, and the first channel is exposed above the arcuate surface and communicates with the second oil passage.

[0016] Alternatively, the end wall of the valve body has a flush surface, which abuts against the side wall of the first cylinder body, and the first channel is exposed above the flush surface and communicates with the second oil passage.

[0017] In one embodiment, a first receiving groove is provided at the end of the valve body that contacts the side wall of the first cylinder, and a first sealing element is disposed in the first receiving groove, the first sealing element being arranged around the outer periphery of the first channel.

[0018] In one embodiment, an extension section is provided on the side wall of the second cylinder body, the extension section is connected to the first mounting hole, the valve body extends into the extension section, and a second receiving groove is provided on the side wall of the valve body that contacts the extension section. A second sealing element is disposed in the second receiving groove, and the second sealing element is arranged around the side wall of the valve body.

[0019] In one embodiment, the first regulating valve is one of a manual regulating valve, an adaptive regulating valve, a solenoid regulating valve, or an electric regulating valve.

[0020] This application has at least the following beneficial effects:

[0021] This application provides a shock absorber, including a piston assembly, a first regulating valve, a second regulating valve, and a first cylinder, a second cylinder, and a third cylinder arranged sequentially from the inside to the outside. The piston assembly is movably disposed in the first cylinder and abuts against the inner wall of the first cylinder to divide the first cylinder into a first inner cavity and a second inner cavity. The first inner cavity is provided with a first oil passage hole, which communicates with the second cylinder. The second inner cavity is provided with a second oil passage hole. The first regulating valve includes a valve body and a valve core. The valve body forms a first channel, a second channel, and a third channel that are connected sequentially. The first channel communicates with the second oil passage hole, and the third channel communicates with the second cylinder. The valve core is located in the second channel and is used to move under the action of an external force to adjust the conductivity of the second channel. The second regulating valve is connected to the second inner cavity and the third cylinder respectively, and is used to adjust the conductivity of the second inner cavity and the third cylinder.

[0022] In existing shock absorbers, the oil circulates a long distance between the first, second, and third cylinders during the downward and upward strokes of the piston assembly. This results in a lag in the oil circuit response, making the shock absorber's handling of high-frequency, fine vibrations insufficiently fast and precise. Compared to the traditional oil movement path (first cylinder - second cylinder - third cylinder), this application significantly shortens the oil movement path during the downward and upward strokes of the piston assembly by setting a bidirectional oil passage path between the first and second cylinders (specifically, first inner cavity - first oil passage hole - second cylinder - first regulating valve - second inner cavity), thus eliminating the response delay caused by the long movement path.

[0023] Furthermore, traditional shock absorbers have a large oil storage space in the third cylinder, with oil only filling a portion of the internal space. Therefore, in scenarios involving high-frequency, fine vibrations, the oil movement is slow, leading to a delayed shock absorber response. This application addresses this by establishing a bidirectional oil passage between the first and second cylinders (specifically, the first inner cavity – first oil passage hole – second cylinder – first regulating valve – second inner cavity). This utilizes the smaller volume and capacity of the second cylinder, which is filled with oil, ensuring that under high-pressure or rapidly changing conditions, the piston assembly movement rapidly replenishes the oil to the target cavity. This avoids shock absorber idle travel, making the shock absorber more sensitive to road feedback, quickly handling high-frequency, fine vibrations, resulting in clearer road feel and improved handling.

[0024] Furthermore, this application achieves fine-tuning of the damping force across different frequency bands by connecting the first and second cylinders via a first regulating valve, and the first and third cylinders via a second regulating valve. The first regulating valve, as the main damping adjustment system, is primarily responsible for handling high-frequency, low-amplitude everyday road vibrations (such as minor bumps and changes in vehicle posture), directly determining the basic stiffness characteristics of the shock absorber and improving ride comfort and handling stability. The second regulating valve, as an auxiliary buffer system, is mainly responsible for intervening when the shock absorber faces low-frequency, high-amplitude extreme impacts (such as driving over large potholes or speed bumps), especially providing crucial venting and buffering near the end of the piston's compression stroke, effectively absorbing significant impact energy and preventing rigid collisions, thereby improving comfort and component reliability under extreme conditions. Through the coordinated operation of the first and second regulating valves, this application enables the shock absorber to perform excellently across a wide range of road conditions, ensuring both a smooth ride for everyday driving and the ability to withstand severe impacts. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 Schematic diagram of the cross-sectional structure of the shock absorber provided in this embodiment Figure 1 ;

[0027] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0028] Figure 3 for Figure 1 Local magnification of region B Figure 1 ;

[0029] Figure 4 The explosion of the shock absorber provided in this embodiment Figure 1 ;

[0030] Figure 5 for Figure 4 A magnified view of a portion of region D in the middle;

[0031] Figure 6 The explosion of the shock absorber provided in this embodiment Figure 2 ;

[0032] Figure 7 for Figure 6 A magnified view of a portion of region E in the middle.

[0033] Figure 8 for Figure 1 Local magnification of region B Figure 2 ;

[0034] Figure 9 Schematic diagram of the cross-sectional structure of the shock absorber provided in this embodiment Figure 2 ;

[0035] Figure 10 for Figure 9 Local magnification of region C Figure 1 ;

[0036] Figure 11 This is a schematic diagram of the valve body provided in this embodiment;

[0037] Figure 12 for Figure 1 Local magnification of region B Figure 3 ;

[0038] Figure 13 for Figure 1 Local magnification of region B Figure 4 ;

[0039] Figure 14 for Figure 1 Local magnification of region B Figure 5 ;

[0040] Figure 15 for Figure 9 Local magnification of region C Figure 2 .

[0041] Figure label:

[0042] 1-First cylinder block; 2-Second cylinder block; 3-Third cylinder block; 4-Piston assembly; 5-First regulating valve; 6-Second regulating valve; 11-First inner cavity; 12-Second inner cavity; 14-Positioning groove; 21-Second mounting hole; 22-Extension section; 31-First mounting hole; 51-Valve body; 52-Valve core; 53-First seal; 54-Second seal; 55-Gap; 131-First oil passage hole; 132-Second oil passage hole; 141-Bottom wall of positioning groove; 142- Side wall of positioning groove; 511-first channel; 512-third channel; 513-second channel; 514-end wall of valve body; 515-side wall of valve body; 516-first valve body; 517-second valve body; 5141-first end wall; 5142-second end wall; 5143-arc surface; 5144-first receiving groove; 5145-third end wall; 5151-hidden side wall; 5152-exposed side wall; 5153-second receiving groove; 51421-flush surface. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] Example 1

[0047] like Figures 1 to 11As shown, this embodiment provides a shock absorber, including a first regulating valve 5, a second regulating valve 6, a piston assembly 4, and a first cylinder 1, a second cylinder 2, and a third cylinder 3 arranged sequentially from the inside to the outside; the piston assembly 4 is movably disposed in the first cylinder 1 and abuts against the inner wall of the first cylinder 1 to divide the first cylinder 1 into a first inner cavity 11 and a second inner cavity 12.

[0048] The first inner cavity 11 is provided with a first oil passage 131, and the first inner cavity 111 is connected to the second cylinder 2 through the first oil passage 131. The second inner cavity 12 is provided with a second oil passage 132. The first regulating valve 5 includes a valve body 51 and a valve core 52. The valve body 51 forms a first channel 511, a second channel 513 and a third channel 512 connected in sequence. The valve core 52 is located in the second channel 513 and is used to move under the action of external force to adjust the degree of conduction of the second channel 513. The second regulating valve 6 is connected to the second inner cavity 12 and the third cylinder 3 respectively, and the second regulating valve 6 is used to adjust the degree of conduction of the second inner cavity 12 and the third cylinder 3.

[0049] In existing shock absorbers, the oil circulates a long distance between the three cylinders (first cylinder 1, second cylinder 2, and third cylinder 3) during the downward and upward strokes of the piston assembly. This results in a lag in the oil circuit response, making the shock absorber's handling of high-frequency, fine vibrations insufficiently rapid and precise. Compared to the traditional oil movement path (first cylinder 1 - second cylinder 2 - third cylinder 3), this application establishes a bidirectional oil passage path between the first cylinder 1 and the second cylinder 2 (specifically, first inner cavity 11 - first oil passage hole 131 - second cylinder 2 - first regulating valve 5 - second inner cavity 12). Figure 3 and Figure 8 The arrows in the diagram illustrate the movement of the oil in one direction (but are not limited to this), which greatly shortens the movement path of the oil during the downward and upward strokes of the piston assembly 4, eliminating the response delay caused by the long movement path.

[0050] Furthermore, in traditional shock absorbers, the third cylinder 3 has a large oil storage space, and the oil only fills a portion of the internal space. Therefore, in scenarios involving high-frequency, fine vibrations, the oil movement speed is slow, resulting in a delayed response of the shock absorber. This application addresses this by establishing a bidirectional oil passage between the first cylinder 1 and the second cylinder 2 (specifically, the first inner cavity 11 - the first oil passage 131 - the second cylinder 2 - the first regulating valve 5 - the second inner cavity 12). This allows the second cylinder 2 to be utilized due to its smaller volume and the fact that it is filled with oil. This ensures that under high pressure or rapidly changing conditions, the movement of the piston assembly 4 allows the oil to be quickly replenished to the target cavity, preventing the shock absorber from idling. This makes the shock absorber more sensitive to road feedback, quickly handling high-frequency, fine vibrations, resulting in clearer road feel and improved handling.

[0051] Furthermore, this application connects the first cylinder 1 and the second cylinder 2 via the first regulating valve 5, and connects the first cylinder 1 and the third cylinder 3 via the second regulating valve 6, achieving fine-tuning of the damping force across different frequency bands. The first regulating valve 5, as the main damping adjustment system, is used to regulate the oil flow rate of the first oil passage, primarily responsible for handling high-frequency, low-amplitude daily road vibrations (such as minor bumps and changes in vehicle posture). Its adjustment directly determines the basic stiffness characteristics of the shock absorber, ensuring ride comfort and handling stability. The second regulating valve 6, as an auxiliary buffer system, regulates the flow rate of the second oil passage, primarily responsible for intervening when the shock absorber faces low-frequency, high-amplitude extreme impacts (such as passing over large potholes or speed bumps). Especially when the piston is near the end of its compression stroke, it provides crucial venting and buffering, effectively absorbing huge impact energy and preventing rigid collisions, thereby improving comfort and component reliability under extreme conditions. In this embodiment, the shock absorber performs well under a wide range of road conditions through the coordinated operation of the first regulating valve 5 and the second regulating valve 6, ensuring both the quality of daily driving and the ability to cope with severe impacts.

[0052] Furthermore, in this embodiment, the first channel 511, the third channel 512, and the second channel 513 are all located on the same valve body 51, avoiding the weak links that may exist in the separate assembly. This allows the valve body 51 to withstand the continuous high-pressure oil impact and mechanical vibration inside the shock absorber, effectively preventing the risk of failure due to fatigue or loosening at the connection, and greatly improving the structural integrity and long-term operational reliability of the regulating valve and even the entire shock absorber assembly.

[0053] Furthermore, in this embodiment, the first channel 511, the third channel 512, and the second channel 513 are all located on the same valve body 51, and the connection path between the channels is entirely guaranteed by the valve body 51 itself, eliminating any inter-component interfaces requiring additional sealing. This fundamentally eliminates the possibility of internal leakage of high-pressure oil between different channels within the valve body 51. It ensures that all oil flowing through the first regulating valve 5 must be controlled through the second channel 513 regulated by the valve core 52, thereby guaranteeing the accuracy and consistency of damping force adjustment.

[0054] Specifically, the first regulating valve 5 is one of a manual regulating valve, an adaptive regulating valve, a solenoid regulating valve, or an electric regulating valve.

[0055] like Figure 3 and Figure 8As shown, in one embodiment, the first regulating valve 5 is a manual regulating valve, and the valve body 51 includes a first valve body 516 and a second valve body 517. The first valve body 516 forms a first channel 511, a second channel 513 and a third channel 512 that are connected in sequence. The second valve body 517 is disposed on the first valve body 516 and is used to drive the valve core 52 to move in the second channel 513 when rotating.

[0056] Specifically, such as Figure 2 As shown, the first inner cavity 11 is provided with one or more first oil passage holes 131.

[0057] Specifically, such as Figure 3 As shown, the second inner cavity 12 is provided with one or more second oil passage holes 132, and each second oil passage hole 132 is equipped with a first regulating valve 5 to ensure that the oil enters the second cylinder 2 through the first regulating valve 5, so as to avoid the shock absorber from failing due to excessive oil movement speed.

[0058] like Figure 3 As shown, in one embodiment, the side wall of the third cylinder 3 is provided with a first mounting hole 31, the side wall of the second cylinder 2 is provided with a second mounting hole 21, the first regulating valve 5 passes through the first mounting hole 31 and the second mounting hole 21 in sequence and then abuts against the side wall of the first cylinder 1, and the first channel 511 is connected to the second oil passage 132, and the third channel 512 is connected to the second cylinder 2.

[0059] Specifically, the axes of the first mounting hole 31, the second mounting hole 21, and the first regulating valve 5 are collinear.

[0060] This embodiment greatly simplifies the structure and processing of the shock absorber by setting a first regulating valve 5 that penetrates the mounting holes on the third cylinder 3 and the second cylinder 2 and directly abuts against the side wall of the first cylinder 1. By transforming the complex oil circuit interface into a simple axial assembly, the machining of high-precision threaded holes or joints in each cylinder is avoided, reducing the difficulty of parts processing and manufacturing costs, and relaxing the precision requirements for multi-layer cylinder assembly. At the same time, the spatial layout and fluid performance are optimized. The shock absorber structure of this embodiment is compact, effectively reducing the radial space occupation, while forming a short-path, low-flow-resistance oil channel, improving the response efficiency of the shock absorber. Furthermore, the through-type mounting method of the first regulating valve 5 also acts as a reinforcing rib, improving the overall stability of the assembly. Additionally, maintenance personnel can directly inspect or replace the valve from the outside without disassembling the assembly, reducing maintenance costs and time.

[0061] like Figure 3 , Figure 5 and Figure 7As shown, in one embodiment, a first receiving groove 5144 is provided at the end of the valve body 51 that contacts the side wall of the first cylinder 1. A first sealing member 53 is disposed in the first receiving groove 5144 and is arranged around the outer periphery of the first channel 511.

[0062] Specifically, the first sealing element 53 is an O-ring.

[0063] This embodiment significantly improves the sealing reliability when the first regulating valve 5 is connected to the first cylinder 1, reduces maintenance requirements, and the sealing groove structure facilitates the installation and replacement of the seals, thereby improving the maintainability and environmental adaptability of the shock absorber.

[0064] like Figure 3 and Figure 10 As shown, in one embodiment, an extension section 22 is provided on the side wall of the second cylinder 2. The extension section 22 is connected to the first mounting hole 31. The valve body 51 extends into the extension section 22. A second receiving groove 5153 is provided on the side wall of the valve body 51 that contacts the extension section 22. A second sealing member 54 is disposed in the second receiving groove 5153. The second sealing member 54 is arranged around the side wall 515 of the valve body.

[0065] Specifically, the second seal 54 is an O-ring.

[0066] Specifically, the extension segment 22 is collinear with the axes of the first mounting hole 31 and the second mounting hole 21.

[0067] In this embodiment, an extension section 22 is provided on the second cylinder 2 as a guide and support structure for the first regulating valve 5, which ensures the coaxial installation of the first regulating valve 5 and improves the stability of the installation of the first regulating valve 5; and by surrounding the side wall of the first regulating valve 5 with the second sealing member 54, oil is prevented from leaking from the gap between the valve body 51 and the extension section 22 to the external environment, thereby enhancing the sealing performance of the overall structure of the first regulating valve 5.

[0068] like Figure 3 As shown, the end wall 514 of the valve body abuts against the side wall of the first cylinder 1, the first channel 511 protrudes from the end wall 514 of the valve body and communicates with the second oil passage 132, and the third channel 512 protrudes from the side wall 515 of the valve body and communicates with the second cylinder 2; wherein, there is a first distance between the channel opening of the third channel 512 and the side wall of the first cylinder 1, and the ratio of the first distance to the total length of the first regulating valve 5 is less than 40%.

[0069] Specifically, the first distance refers to the distance between the center of the opening of the third channel 512 and the side wall of the first cylinder 1.

[0070] In this embodiment, the inlet of the third channel 512 is located at the end of the first regulating valve 5, meaning that both ports of the internal oil passage of the first regulating valve 5 are converged at the end of the first regulating valve 5. This makes the first regulating valve 5 suitable for a small-capacity second cylinder, enabling rapid oil compensation between the second inner cavity 12 and the second cylinder 2 when the shock absorber is subjected to impact.

[0071] like Figure 6 and Figure 7 As shown, in one embodiment, the end wall 514 of the valve body has an arcuate surface 5143, which abuts against the side wall of the first cylinder 1; the first channel 511 exposes the arcuate surface 5143 and communicates with the second oil passage 132.

[0072] This embodiment allows the end wall 514 of the valve body to have an arc-shaped surface 5143 that naturally fits the curved surface of the side wall of the first cylinder 1, improving the contact sealing performance, reducing the risk of oil leakage at the connection point when the first channel 511 and the second oil passage 132 are connected, and improving reliability; in addition, no additional processing of the first cylinder 1 is required during the production process, simplifying the processing steps; at the same time, during the assembly process, the operator only needs to position the end wall 514 of the valve body and press it against the side wall of the first cylinder 1 at the second oil passage 132, reducing the assembly difficulty.

[0073] like Figure 4 and Figure 5 As shown, in another embodiment, the end wall 514 of the valve body has a flush surface 51421 that abuts against the side wall of the first cylinder 1, and the first channel 511 is exposed above the flush surface 51421 and communicates with the second oil passage 132.

[0074] In this embodiment, the flush surface abuts against the side wall of the first cylinder 1, eliminating the need for additional processing of the first regulating valve 5, thus simplifying the processing steps of the first regulating valve 5 and reducing the processing difficulty of the first regulating valve 5.

[0075] like Figure 3 As shown, the opening of the third channel 512 extends from the side wall 515 of the valve body to the end wall 514 of the valve body, and the third channel 512 exposes both the side wall 515 and the end wall 514 of the valve body.

[0076] In this embodiment, the third channel 512 is exposed to both the side wall 515 and the end wall 514 of the valve body, which increases the oil passage space of the third channel 512, accelerates the oil flow rate, makes the oil evenly distributed, and improves the response speed of the shock absorber.

[0077] like Figure 10 and Figure 11As shown, the valve body end wall 514 includes a first end wall 5141 and a second end wall 5142. The first end wall 5141 is connected to the side wall 515 of the valve body, and the second end wall 5142 is disposed on the first end wall 5142 to form a stepped end wall. The second end wall 5142 abuts against the side wall of the first cylinder 1. The first channel 511 is exposed above the second end wall 5142 and communicates with the second oil passage 132. A gap 55 is formed between the first end wall 5141 and the side wall of the first cylinder 1. The third channel 512 is exposed above at least one of the first end wall 5141 and the side wall 515 of the valve body and communicates with the second cylinder 2.

[0078] In this embodiment, a stepped end wall is formed by the first end wall 5141 and the second end wall 5142, so that when the first regulating valve 5 abuts against the side wall of the first cylinder 1, a gap 55 is formed between the first end wall 5141 and the side wall of the first cylinder 1, which increases the oil passage space between the third channel 512 and the second cylinder 2, speeds up the oil flow rate, helps the oil to be evenly distributed, and improves the response speed of the shock absorber.

[0079] In one embodiment, the third channel 512 exposes the first end wall 5141.

[0080] In one embodiment, the third channel 512 is exposed on the side wall 515 of the valve body.

[0081] In one embodiment, the opening of the third channel 512 extends from the side wall 515 of the valve body to the first end wall 5141. The third channel 512 exposes both the side wall 515 and the first end wall 5141 of the valve body, thereby maximizing the opening of the third channel 512 and helping to accelerate the oil flow rate.

[0082] like Figure 11 As shown, the valve body end wall 514 also includes at least one third end wall 5145, which is located between the first end wall 5141 and the second end wall 5142 to form a multi-step end wall.

[0083] In this embodiment, at least one third end wall 5145 is provided between the first end wall 5141 and the second end wall 5142 to increase the gap 55 space between the first end wall 5141 and the side wall of the first cylinder 1, thereby increasing the oil passage space between the third channel 512 and the second cylinder 2, which helps to accelerate the oil flow rate, make the oil evenly distributed, and improve the response speed of the shock absorber.

[0084] Example 2

[0085] like Figures 12 to 15As shown, in one embodiment, a positioning groove 14 is provided on the outer periphery of the second oil passage 132, the valve body 51 is located in the positioning groove 14, the first channel 511 is exposed above the end wall 514 of the valve body and communicates with the second oil passage 132, and the third channel 512 is exposed above the side wall 515 and / or the end wall 514 of the valve body and communicates with the second cylinder 2.

[0086] This embodiment provides a precise installation reference for the valve body 51 by creating a positioning groove 14 next to the second oil passage 132, allowing the first valve body 516 to move under the restriction of the positioning groove 14. This ensures that the first channel 511 and the second oil passage 132 are automatically and accurately aligned, simplifying the assembly process. The installer does not need to make fine adjustments in the axial direction of the first cylinder 1, significantly reducing the assembly difficulty.

[0087] like Figure 12 As shown, in one embodiment, the valve body 51 is embedded in the positioning groove 14. The positioning groove 14 covers the valve body 51 and divides the side wall 515 of the valve body into a hidden side wall 5151 and an exposed side wall 5152. The hidden side wall 5151 is located within the positioning groove 14 and contacts the side wall 142 of the positioning groove. The third channel 512 exposes the exposed side wall 5152. Specifically, after the valve body 51 is embedded in the positioning groove 14, the hidden side wall 5151 is covered by the positioning groove 14, and the exposed side wall 5152 is exposed in the positioning groove 14.

[0088] This embodiment makes the dimensions of the valve body 51 and the positioning groove 14 compatible, further reducing the installation difficulty of the first regulating valve 5; and by forming a tight fit between the hidden side wall 5151 and the positioning groove 14, the positioning groove 14 provides additional radial support and sealing for the first regulating valve 5, reducing the risk of displacement of the valve body 51 under vibration.

[0089] like Figure 13 As shown, in one embodiment, the valve body 51 is located in the positioning groove 14, the side wall 515 of the valve body is separated from the side wall 142 of the positioning groove, and the third channel 512 is exposed outside the side wall 515 of the valve body.

[0090] In this embodiment, the side wall 515 of the valve body is separated from the side wall 142 of the positioning groove to form a gap. Due to the existence of the gap, the first regulating valve 5 provided in this embodiment allows the valve body 51 to have a certain tolerance during installation, which reduces the precision requirements of processing and assembly and improves production economy.

[0091] like Figure 13 As shown, in one embodiment, the third channel 512 exposes the side wall 515 and the end wall 514 of the valve body.

[0092] Specifically, the end of the third channel 512 exposes the side wall 515 and the end wall 514 of the valve body, respectively, or the end of the third channel 512 exposes both the side wall 515 and the end wall 514 of the valve body.

[0093] In this embodiment, based on the gap formed between the side wall 515 of the valve body and the side wall 142 of the positioning groove, the third channel 512 is exposed to the side wall 515 and the end wall 514 of the valve body, which increases the oil passage space of the third channel 512, accelerates the oil flow rate, makes the oil evenly distributed, and improves the response speed of the shock absorber.

[0094] like Figure 14 and Figure 15 As shown, in one embodiment, the valve body 51 is located in the positioning groove 14, and the side wall 515 of the valve body is separate from the side wall 142 of the positioning groove.

[0095] The valve body end wall 514 includes a first end wall 5141 and a second end wall 5142. The first end wall 5141 protrudes outward to form the second end wall 5142, and the first channel 511 is exposed to the second end wall 5142. The first end wall 5141 is separated from the bottom wall 141 of the positioning groove, and the third channel 512 is exposed to the first end wall 5141.

[0096] In this embodiment, the valve body 51 end wall adopts a stepped structure, which separates the valve body side wall 515 from the positioning groove side wall 142 and the first end wall 5141 from the positioning groove bottom wall 141, forming two gaps, providing additional communication area for the third channel 512 to communicate with the second cylinder 2.

[0097] In another embodiment, the third channel 512 exposes the first end wall 5141 and the side wall 515 of the valve body. Specifically, the ends of the third channel 512 expose the first end wall 5141 and the side wall 515 of the valve body respectively, or the ends of the third channel 512 may expose both the first end wall 5141 and the side wall 515 of the valve body simultaneously.

[0098] In this embodiment, the third channel 512 is exposed on the side wall 515 and end wall 514 of the valve body, which increases the oil passage space of the third channel 512, accelerates the oil flow rate, makes the oil evenly distributed, and improves the response speed of the shock absorber.

[0099] The other contents of this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0100] Note that the above description is merely a preferred embodiment and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this application, and the scope of this application is determined by the scope of the appended claims.

[0101] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A shock absorber, characterized in that, It includes a piston assembly, a first regulating valve, a second regulating valve, and a first cylinder, a second cylinder, and a third cylinder arranged sequentially from the inside to the outside. The piston assembly is movably disposed in the first cylinder and abuts against the inner wall of the first cylinder to divide the first cylinder into a first inner cavity and a second inner cavity. The first inner cavity is provided with a first oil passage hole, and the first inner cavity is connected to the second cylinder body through the first oil passage hole. The second inner cavity is provided with a second oil passage hole. The first regulating valve includes a valve body and a valve core. The valve body forms a first channel, a second channel, and a third channel that are connected in sequence. The first channel is connected to the second oil passage hole, and the third channel is connected to the second cylinder body. The valve core is located in the second channel and is used to move under the action of external force to adjust the conductivity of the second channel. The second regulating valve is connected to the second inner cavity and the third cylinder body respectively, and the second regulating valve is used to adjust the conductivity of the second inner cavity and the third cylinder body.

2. The shock absorber according to claim 1, characterized in that, The third cylinder sidewall is provided with a first mounting hole, and the second cylinder sidewall is provided with a second mounting hole. The first regulating valve passes through the first mounting hole and the second mounting hole in sequence and then abuts against the first cylinder sidewall so that the first channel communicates with the second oil passage.

3. The shock absorber according to claim 1, characterized in that, The end wall of the valve body abuts against the side wall of the first cylinder body, the first channel protrudes from the end wall of the valve body and communicates with the second oil passage, and the third channel protrudes from the side wall of the valve body and communicates with the second cylinder body; The third channel has a first distance between its opening and the side wall of the first cylinder, and the ratio of the first distance to the total length of the first regulating valve is less than 40%.

4. The shock absorber according to claim 3, characterized in that, The opening of the third channel extends from the side wall of the valve body to the end wall of the valve body, and the third channel exposes both the side wall and the end wall of the valve body.

5. The shock absorber according to claim 3, characterized in that, The valve body's end wall includes a first end wall and a second end wall. The first end wall is connected to the side wall of the valve body, and the second end wall is disposed on the first end wall to form a stepped end wall. The second end wall abuts against the side wall of the first cylinder body, the first channel is exposed above the second end wall and communicates with the second oil passage, a gap is formed between the first end wall and the side wall of the first cylinder body, and the third channel is exposed above at least one of the first end wall and the side wall of the valve body and communicates with the second cylinder body.

6. The shock absorber according to claim 5, characterized in that, The valve body also includes at least one third end wall, which is located between the first end wall and the second end wall to form a multi-step end wall.

7. The shock absorber according to claim 3, characterized in that, The valve body has an arc-shaped surface on its end wall, which abuts against the side wall of the first cylinder body. The first channel is exposed on the arc-shaped surface and communicates with the second oil passage. Alternatively, the end wall of the valve body has a flush surface, which abuts against the side wall of the first cylinder body, and the first channel is exposed above the flush surface and communicates with the second oil passage.

8. The shock absorber according to claim 2, characterized in that, The valve body is provided with a first receiving groove at one end that contacts the side wall of the first cylinder body. A first sealing element is disposed in the first receiving groove and is arranged around the outer periphery of the first channel.

9. The shock absorber according to claim 2, characterized in that, An extension section is provided on the side wall of the second cylinder body, the extension section is connected to the first mounting hole, the valve body extends into the extension section, and a second receiving groove is provided on the side wall of the valve body that contacts the extension section. A second sealing element is disposed in the second receiving groove, and the second sealing element is arranged around the side wall of the valve body.

10. The shock absorber according to claim 1, characterized in that, The first regulating valve is one of a manual regulating valve, an adaptive regulating valve, a solenoid regulating valve, or an electric regulating valve.

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