Damping adjustable shock absorber

Abstract

The application provides a damping-adjustable shock absorber, which comprises a shell, a bottom valve, a working cylinder and a second electromagnetic valve assembly. The shell has an internal space and a first stop surface. The bottom valve is located in the internal space and divides the internal space into a first space and a second space. The bottom valve comprises a second stop surface, which is in close contact with the first stop surface to prevent the bottom valve from moving along the axial direction of the shell towards the second space. The working cylinder is located in the first space and abuts against the bottom valve to prevent the bottom valve from moving along the axial direction of the shell towards the first space. The second electromagnetic valve assembly is located in the second space and connected to the bottom valve along the axial direction of the shell to define the position of the second electromagnetic valve assembly along the axial direction of the shell. The bottom valve, the working cylinder and the second electromagnetic valve assembly are matched with each other in the internal space of the shell to realize the positioning along the axial direction of the shell, and other components are not needed to realize the axial positioning, so that the structure of the shock absorber is simple and stable.

Description

Technical Field

[0001] This application relates generally to the technical field of vehicles, and more specifically to a damping adjustable shock absorber. Background Technology

[0002] In related technologies, shock absorbers are equipped with two solenoid valve assemblies for adjusting damping force. One solenoid valve assembly is located at the bottom of the shock absorber, and the other is located on the side of the shock absorber. However, the shock absorber housing needs to ensure the stable installation of the solenoid valve at the bottom, and also needs to consider the reliable stability of the connection structure with the axle connector within a limited space, resulting in a particularly complex and unreliable structure for the shock absorber. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] To at least partially solve the above problems, this application provides a damping adjustable vibration damper, the damping adjustable vibration damper comprising:

[0005] A housing having an internal space for accommodating oil and a first stop surface formed in the internal space, the first stop surface being arranged intersecting the axial direction of the housing;

[0006] A bottom valve is located in the internal space of the housing and divides the internal space into a first space and a second space arranged along the axial direction. The bottom valve includes a second stop surface that abuts against the first stop surface to prevent the bottom valve from moving toward the second space along the axial direction of the housing.

[0007] A working cylinder, located in the first space and abutting against the bottom valve, to prevent the bottom valve from moving axially toward the first space along the housing; and

[0008] A second solenoid valve assembly is located in the second space and is axially connected to the bottom valve along the housing to define the axial position of the second solenoid valve assembly in the housing.

[0009] According to the damping adjustable shock absorber of this application, the bottom valve, the working cylinder and the second solenoid valve assembly cooperate with each other inside the housing to achieve axial positioning along the housing, without the need for other components to achieve the purpose of axial positioning, which makes the structure of the shock absorber simpler and more stable.

[0010] Optionally, the bottom valve includes:

[0011] A bottom valve body portion having a compression port and a compensation port, the compression port being in fluid communication with the second solenoid valve assembly and the first space, the compensation port being offset from the compression port; and

[0012] A compensation valve is movably disposed over the compensation hole. The compensation valve is configured to open the compensation hole when the applied hydraulic force is directed toward the first space along the axial direction, and to close the compensation hole when the applied hydraulic force is directed toward the second space along the axial direction.

[0013] Optionally, the damping adjustable shock absorber further includes an intermediate cylinder, which is located in the first space and sleeved on the outside of the working cylinder, and the intermediate cylinder is axially connected to the bottom valve along the housing.

[0014] Optionally, the outer peripheral surface of the bottom valve is provided with a first stop and a second stop. The first stop is further away from the second space along the axial direction of the housing than the second stop. The first stop cooperates with the end of the working cylinder to limit the position of the working cylinder along the axial direction and the radial direction of the housing. The second stop is with the intermediate cylinder.

[0015] Optionally, the housing has a first end and a second end that are opposite in the axial direction, and the end of the second end of the housing is provided with a third stop surface that intersects the axial direction of the housing;

[0016] The damping adjustable shock absorber also includes a fork arm, which has a mounting hole. The mounting hole includes a first hole section and a second hole section. The inner diameter of the second hole section is smaller than the inner diameter of the first hole section. The first hole section allows the second end of the housing to be inserted. A fourth stop surface is formed between the first hole section and the second hole section. The fourth stop surface abuts against the third stop surface.

[0017] Optionally, a connecting hole is provided at the end of the second end of the housing. The connecting hole extends along the axial direction of the housing and communicates with the internal space. The inner diameter of the second hole segment is greater than or equal to the inner diameter of the connecting hole. The third stop surface is arranged around the connecting hole.

[0018] Optionally, the outer peripheral surface of the second end of the housing is provided with a first mating surface extending circumferentially, the first mating surface extending axially along the housing to the third stop surface, the third stop surface being used to approach or abut against the inner wall of the first hole segment, and the diameter of the first mating surface being smaller than the radial outer dimension of the rest of the housing.

[0019] Optionally, the length of the third stop surface along the axial direction of the housing is greater than the depth of the first hole segment.

[0020] Optionally, the damping adjustable shock absorber further includes a transition joint located between the bottom valve and the second solenoid valve assembly along the axial direction of the housing, and the transition joint has a first through hole extending along the axial direction of the housing;

[0021] The bottom valve includes a compression oil passage connector, at least a portion of the compression hole is disposed through the compression oil passage connector along the axial direction, and the compression oil passage connector is connected to the transition connector along the axial direction of the housing, so that the compression hole communicates with the first through hole;

[0022] The second solenoid valve assembly has an oil inlet port, which is axially connected to the transition joint along the housing, and the oil inlet port communicates with the compression port via the first through hole.

[0023] Optionally, the second solenoid valve assembly includes a transition joint, the second solenoid valve assembly having an oil inlet hole, at least a portion of the oil inlet hole being disposed through the transition joint along the axial direction; the bottom valve body includes a compression oil passage joint adapted to the transition joint, at least a portion of the compression hole being disposed through the compression oil passage joint along the axial direction, the compression oil passage joint being connected to the transition joint.

[0024] Optionally, the second solenoid valve assembly includes a second solenoid valve body and an end cap, the end cap being connected to the second solenoid valve body, the oil inlet penetrating the end cap, and the end of the transition joint along the axial direction of the housing being detachably connected to the end cap.

[0025] The transition joint abuts against the end cap.

[0026] Optionally, the second solenoid valve assembly further includes a second solenoid valve body and an end cap, the end cap being connected to the second solenoid valve body, the oil inlet penetrating the end cap, and the transition joint and the end cap being integrally formed.

[0027] Optionally, the fork arm also has a notch located on the side of the mounting hole. The notch is radially connected to the mounting hole and the outside of the fork arm, and axially penetrates the fork arm. The fork arm includes a pair of connecting ears located on both sides of the notch. The connecting ears are used to connect fasteners to clamp the housing.

[0028] Optionally, the working cylinder divides the first space into a first cavity and a working cavity arranged radially from the outside to the inside, and the housing is provided with a first oil passage hole and a second oil passage hole spaced apart along the axial direction. The first oil passage hole is in fluid communication with the outside of the first cavity and the housing, and the second oil passage hole is in fluid communication with the outside of the second space and the housing.

[0029] The adjustable damping shock absorber also includes:

[0030] A piston rod assembly, the piston rod assembly including a piston member located in the working chamber to divide the working chamber into a first working chamber and a second working chamber, the second working chamber being closer to the bottom valve along the axial direction than the first working chamber, the first working chamber being in fluid communication with the first chamber.

[0031] The bottom valve is configured such that: when the hydraulic force acting on the bottom valve is directed toward the first space along the axial direction, the bottom valve allows oil to flow from the second space into the second working chamber; and when the hydraulic force acting on the bottom valve is directed toward the second space along the axial direction, the bottom valve allows oil to flow from the second working chamber into the second space.

[0032] Optionally, a compression chamber is formed between the second solenoid valve assembly, the bottom valve, and the housing, and the compression chamber is fluidly connected to the outside of the housing via the second oil passage, and the second solenoid valve assembly is connected in series between the compression chamber and the bottom valve;

[0033] The damping adjustable shock absorber also includes a first solenoid valve assembly, which is connected to the outer side of the housing and is connected in series between the first cavity and the first working cavity.

[0034] Optionally, the damping adjustable shock absorber further includes:

[0035] A hydraulic pump assembly is located outside the housing and is in fluid communication with the first oil passage and the second oil passage. The hydraulic pump assembly is used to pump oil into the first oil passage or the second oil passage and to extract oil from the first oil passage or the second oil passage.

[0036] A recovery accumulator, connected in series between the hydraulic pump assembly and the first chamber, is used to store oil; and

[0037] A compression accumulator is connected in series between the hydraulic pump assembly and the compression chamber, and the compression accumulator is used to store oil.

[0038] Optionally, the piston component includes:

[0039] The piston body portion, wherein the piston body portion is provided with a second through hole; and

[0040] A flow valve is movably disposed over the second through hole. The flow valve is configured to open the second through hole when subjected to a hydraulic force along the axial direction toward the first working chamber, so as to allow oil to flow from the second working chamber to the first working chamber. Attached Figure Description

[0041] The following drawings, illustrating embodiments of this application, are incorporated herein by reference and are used to understand this application. The drawings illustrate embodiments of this application and their descriptions, serving to explain the principles of this application. In the drawings,

[0042] Figure 1 This is a cross-sectional view of a damping adjustable shock absorber according to a preferred embodiment of this application;

[0043] Figure 2 for Figure 1 A partial perspective view of the damping adjustable vibration damper shown;

[0044] Figure 3 for Figure 1 The diagram shows a perspective view of the adjustable damper after the fork arm has been removed.

[0045] Figure 4 for Figure 1 A three-dimensional view of the fork arm shown;

[0046] Figure 5 for Figure 1 A cross-sectional view of the base shown;

[0047] Figure 6 for Figure 1 A perspective view of the bottom valve shown;

[0048] Figure 7 for Figure 1 A partial cross-sectional view of the damping adjustable shock absorber shown;

[0049] Figure 8 for Figure 1 The sectional view of the bottom valve shown; and

[0050] Figure 9 This is a cross-sectional view of a damping adjustable shock absorber according to another preferred embodiment of this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100: Oil reservoir assembly; 100a: Restoration chamber

[0053] 100b: First working chamber; 100c: Second working chamber

[0054] 100d: Intermediate cavity; 100e: Compression cavity

[0055] 110: Bottom valve 111: Bottom valve body

[0056] 111a: Second stop surface; 111b: Compression hole

[0057] 111c: Compensation hole; 111d: Compression oil fitting

[0058] 111e: First stop; 111f: Second stop

[0059] 111g: First segment outer circumference; 111h: Second segment outer circumference.

[0060] 111i: Third segment outer peripheral surface; 111j: Fifth stop surface

[0061] 111k: Sixth stop surface; 112: Compensation valve section

[0062] 120: Housing; 121: Oil reservoir

[0063] 122: Base 122a: First oil passage hole

[0064] 122b: Second oil passage hole; 122c: Restoration oil passage hole

[0065] 122d: First stop surface; 122e: Third stop surface

[0066] 122f: First mating surface; 122g: Second mating surface

[0067] 122h: First port; 122m: Second port

[0068] 130: Intermediate cylinder; 130a: Intermediate oil passage.

[0069] 140: Working cylinder; 140a: Working oil passage.

[0070] 150: Connecting block 150a: First oil inlet / outlet port

[0071] 150b: Second oil inlet / outlet port; 160: Valve seat.

[0072] 170: Guide sleeve; 170a: First outer mating surface

[0073] 170b: Second outer mating surface; 170c: Third outer mating surface

[0074] 171: Oil seal assembly; 200: Piston rod assembly

[0075] 210: Rod assembly; 220: Piston assembly

[0076] 221: Piston body section 221a: Second through hole

[0077] 222: Flow valve section; 230: Limiting component

[0078] 250: Buffer component; 300: First solenoid valve assembly

[0079] 310: Throttling valve; 320: Check valve

[0080] 500: Second solenoid valve assembly; 500a: Oil inlet.

[0081] 500b: Oil outlet port 510: Second solenoid valve body

[0082] 520: End cap; 530: Transition joint

[0083] 530a: First through hole; 550: Solenoid valve wiring harness

[0084] 560: Solenoid valve solenoid; 600: Hydraulic pump assembly

[0085] 700: Restorative accumulator; 710: Compression accumulator

[0086] 720: First oil pipe; 730: Second oil pipe

[0087] 800: Fork arm; 800a: Mounting hole

[0088] 800b: Fourth stop surface; 800c: Notch

[0089] 800d: Connecting ear; 900: Spring support base Detailed Implementation

[0090] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0091] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art.

[0092] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of this application. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0093] The ordinal numbers such as "first" and "second" used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0094] The specific embodiments of this application will be described in more detail below with reference to the accompanying drawings, which illustrate representative embodiments of this application and are not intended to limit this application.

[0095] This application provides a damping adjustable shock absorber. The damping adjustable shock absorber is used in a vehicle. For example, the damping adjustable shock absorber may be part of the vehicle's suspension assembly. The vehicle may include an axle (not shown) and a body (not shown). The damping adjustable shock absorber is connected between the body and the axle to suppress or reduce vibrations experienced by the body.

[0096] See below. Figures 1 to 9 The example shown illustrates the damping adjustable vibration damper according to this application in detail.

[0097] The damping adjustable shock absorber according to this application may include a housing 120, a bottom valve 110, a working cylinder 140, and a second solenoid valve assembly 500. Furthermore, the housing 120 has an internal space for accommodating oil and a first stop surface 122d. The first stop surface 122d is arranged intersecting the axial direction of the housing 120. This intersecting arrangement can be vertical or inclined. The bottom valve 110 is located in the internal space and divides the internal space into a first space and a second space arranged axially. The bottom valve 110 may include a second stop surface 111a. The second stop surface 111a abuts against the first stop surface 122d to prevent the bottom valve 110 from moving axially toward the second space along the housing 120. The working cylinder 140 is located in the first space and abuts against the bottom valve 110 to prevent the bottom valve 110 from moving axially toward the first space along the housing 120. The second solenoid valve assembly 500 is located in the second space and is axially connected to the bottom valve 110 along the housing 120 to define the axial position of the second solenoid valve assembly 500 in the housing 120. Here, the bottom valve 110 is axially positioned along the housing 120 by the second stop surface 111a and the working cylinder 140. Axial limiting and positioning are achieved between the bottom valve 110 and the housing 120 through the cooperation of the first stop surface 122d and the second stop surface 111a, eliminating the need for additional parts or components, reducing the number of parts, and also contributing to a more compact and rational internal structure of the shock absorber.

[0098] Optionally, the second solenoid valve assembly 500 is screwed to the housing 120. This further limits the axial position of the second damping assembly. It also serves to secure the second solenoid valve assembly 500 to the housing 120.

[0099] Furthermore, the radial dimension of the second stop surface 111a decreases in the direction parallel to the axial direction and toward the second space. This helps to increase the contact area between the bottom valve 110 and the housing 120, thereby improving the stress performance and enhancing structural stability.

[0100] Furthermore, the second stop surface 111a of the bottom valve 110 can be a 360° annular spherical surface or a conical surface. Correspondingly, the first stop surface 122d of the housing 120 is also a 360° annular spherical surface or a conical surface that matches the second stop surface 111a. Here, "360° annular spherical surface" can be understood as the second stop surface 111a being constructed as an annular spherical surface or annular conical surface extending circumferentially around the central axis of the housing 120. The surface area of ​​the annular spherical surface here can be less than half the surface area of ​​a complete sphere. Choosing to construct the first stop surface 122d as a conical surface or annular spherical surface facilitates the self-adjustment of the bottom valve 110's position inside the housing 120, while ensuring the coaxiality of the working cylinder 140 and the oil reservoir 121.

[0101] In the illustrated example, both the second stop surface 111a and the first stop surface 122d can be 360° toroidal spheres.

[0102] Furthermore, the working cylinder 140 divides the first space into a first chamber and a working chamber arranged radially from the outside to the inside. The housing 120 has a first oil passage 122a and a second oil passage 122b spaced axially. The first oil passage 122a is in fluid communication with the first chamber and the outside of the housing 120. The second oil passage 122b is in fluid communication with the second space and the outside of the housing 120. The damping adjustable shock absorber may also include a piston rod assembly 200. The piston rod assembly 200 includes a piston member 220. The piston member 220 is located in the working chamber to divide the working chamber into a first working chamber 100b and a second working chamber 100c. The second working chamber 100c is axially closer to the bottom valve 110 than the first working chamber 100b. The first working chamber 100b is in fluid communication with the first chamber. The bottom valve 110 is configured such that: when the hydraulic force acting on the bottom valve 110 is axially directed towards the first space, the bottom valve 110 allows oil to flow from the second space into the second working chamber 100c to push the piston rod assembly 200 upward; when the hydraulic force acting on the bottom valve 110 is axially directed towards the second space, the bottom valve 110 allows oil to flow from the second working chamber 100c into the second space to drive the piston rod assembly 200 downward. According to the damping adjustable shock absorber of this application, the bottom valve 110 separates the internal space of the housing 120, thus separating the first chamber and the second space from each other. When the first oil passage 122a and the second oil passage 122b of the oil reservoir assembly 100 are connected to the external hydraulic pump assembly 600, it facilitates the active adjustment of the lifting and lowering of the piston rod assembly 200 by the hydraulic pump assembly 600, thereby achieving the active lifting and lowering of the piston rod assembly 200, and thus meeting the vehicle's demand for the active lifting and lowering function of the shock absorber, to better adjust the vehicle body posture and suppress vehicle pitch and roll. Because the first chamber and the second space are separated from each other, problems such as hydraulic short circuit and abnormal lifting function can be effectively prevented during the active lifting and lowering of the piston rod assembly 200.

[0103] Optionally, a compression chamber 100e is formed by the second solenoid valve assembly 500, the bottom valve 110, and the housing 120. The compression chamber 100e is in fluid communication with the outside of the housing 120 via the second oil passage 122b. The second solenoid valve assembly 500 is connected in series between the compression chamber 100e and the bottom valve 110. The damping adjustable damper may also include a first solenoid valve assembly 300. The first solenoid valve assembly 300 is connected to the outer side of the housing 120. The first solenoid valve assembly 300 is connected in series between the first chamber and the first working chamber 100b. By providing the first solenoid valve assembly 300 and the second solenoid valve assembly 500, the damping force on the piston rod assembly 200 in the axial direction can be adjusted, thereby achieving the purpose of controlling the speed of the piston rod assembly 200 in the axial direction.

[0104] Furthermore, the adjustable damping shock absorber may also include an intermediate cylinder 130. The intermediate cylinder 130 is sleeved outside the working cylinder 140 and located in the first chamber. The intermediate cylinder 130 is axially connected to the bottom valve 110. The intermediate cylinder 130 divides the first chamber into a recovery chamber 100a and an intermediate chamber 100d arranged radially from the outside to the inside. The recovery chamber 100a is fluidly connected to the first oil passage 122a and the intermediate chamber 100d. The intermediate chamber 100d is fluidly connected to the first working chamber 100b. The intermediate oil passage 130a is axially spaced from the working oil passage 140a. The intermediate oil passage 130a is axially close to the bottom valve 110. The working oil passage 140a is axially away from the bottom valve 110. The working oil passage connects the intermediate chamber 100d and the first working chamber 100b.

[0105] See Figures 6 to 8Optionally, the outer peripheral surface of the upper end of the bottom valve 110 can be configured as the outer peripheral surface of a stepped shaft. The radial outer dimension of the outer peripheral surface of this stepped shaft gradually increases along the axial direction of the housing 120 towards the second space. The outer peripheral surface of the bottom valve 110 may include a first outer peripheral surface 111g, a second outer peripheral surface 111h, and a third outer peripheral surface 111i arranged sequentially along the axial direction of the housing 120. The radial outer dimensions of the first outer peripheral surface 111g, the second outer peripheral surface 111h, and the third outer peripheral surface 111i increase sequentially. The working cylinder 140 is sleeved on the outside of the first outer peripheral surface 111g, and the first outer peripheral surface 111g is fitted with or interference-fitted with the shaft hole of the working cylinder 140. A fifth stop surface 111j is formed between the first outer peripheral surface 111g and the second outer peripheral surface 111h. The fifth stop surface 111j intersects the axial direction of the housing 120 and abuts against the end of the working cylinder 140 to prevent the working cylinder 140 from moving along the axial direction of the housing 120. The intermediate cylinder 130 is sleeved on the outside of the second outer peripheral surface 111h, and the second outer peripheral surface 111h is fitted or interference-fitted with the shaft hole of the intermediate cylinder 130. A sixth stop surface 111k is formed between the second outer peripheral surface 111h and the third outer peripheral surface 111i. The sixth stop surface 111k intersects the axial direction of the housing 120 and abuts against the end of the intermediate cylinder 130 to prevent the intermediate cylinder 130 from moving along the axial direction of the housing 120. The third outer peripheral surface 111i can be fitted or interference-fitted with the shaft hole on the inner surface of the oil reservoir 121 or the base 122. In other words, the outer peripheral surface of the bottom valve has a first stop 111e and a second stop 111f. The first stop 111e is defined by the first outer peripheral surface 111g and the fifth stop surface 111j. The second stop 111f is defined by the second outer peripheral surface 111h and the sixth stop surface 111k. The first stop 111e is further away from the second space along the axial direction of the housing 120 than the second stop 111f. The first stop 111e cooperates with the end of the working cylinder 140 to limit the position of the working cylinder 140 along the axial direction and radial direction of the housing 120, and the second stop 111f cooperates with the end of the intermediate cylinder 130 to limit the position of the intermediate cylinder 130 along the axial direction and radial direction of the housing 120.

[0106] Further, the housing 120 has a first end and a second end opposite to each other along the axial direction of the housing 120. The interior of the first end of the housing 120 is used to mount the piston rod assembly 200. The exterior of one end of the housing 120 is used to mount a damping spring. The end of the second end of the housing 120 is provided with a third stop surface 122e. The third stop surface 122e intersects the axial direction of the housing 120. In addition, the damping adjustable damper may also include a fork arm 800. The fork arm 800 has a mounting hole 800a. The mounting hole 800a includes a first hole segment and a second hole segment arranged sequentially along the depth direction. The inner diameter of the second hole segment is smaller than the inner diameter of the first hole segment. The first hole segment allows the second end of the housing 120 to be inserted. A fourth stop surface 800b is formed between the first hole segment and the second hole segment. The fourth stop surface 800b abuts against the third stop surface 122e. With the second end of the housing 120 inserted into the mounting hole 800a, the depth direction of the mounting hole 800a is parallel to the axial direction of the housing 120, and the first hole section is closer to the first end of the housing 120 than the second hole section. According to the damping adjustable shock absorber of this application, by providing the mounting hole 800a in the fork arm 800 for inserting the second end of the housing 120, and by having the fourth stop surface 800b within the mounting hole 800 abut against the third stop surface 122e at the second end of the housing 120, the housing 120 is positioned and supported. Therefore, no additional components are needed to achieve axial positioning between the housing 120 and the fork arm 800. This ensures the stability of the connection structure between the housing 120 and the fork arm 800 and also makes the structure simpler and more reliable.

[0107] For example, a connecting hole is provided at the second end of the housing 120. The connecting hole extends axially along the housing 120 and communicates with the internal space. The inner diameter of the second hole section is greater than or equal to the inner diameter of the connecting hole. A third stop surface 122e is provided around the connecting hole. In this way, when the second end of the housing 120 is inserted into the mounting hole 800a, it is ensured that the fork arm 800 does not obstruct the connecting hole.

[0108] For example, the outer peripheral surface of the second end of the housing 120 is provided with a first mating surface 122f extending circumferentially. The first mating surface 122f extends axially along the housing 120 to a third stop surface 122e. The third stop surface 122e is used to approach or abut against the inner wall of the first bore section. The diameter of the first mating surface 122f is smaller than the radial outer dimension of the rest of the housing 120. In the mounted state of the housing 120 to the fork arm 800, this helps to reduce the radial outer dimension of the connection structure between the housing 120 and the fork arm 800, thereby reducing the space occupied by the corresponding shock absorber.

[0109] Optionally, the length of the third stop surface 122e along the axial direction of the housing 120 is greater than the depth of the first hole. This ensures that the axial force at the connection between the housing 120 and the fork arm 800 is mainly transmitted through the third stop surface 122e and the fourth stop surface 800b.

[0110] Furthermore, an annular positioning groove can be provided on the outer peripheral surface of the second end of the housing 120. The positioning groove can extend axially to the end face of the housing 120, that is, to the third stop surface 122e. In the installed state where the second end of the housing 120 is inserted into the mounting hole 800a, the fork arm 800 is sleeved on the outside of the housing 120 and the annular surface of the positioning groove extending axially is close to or abuts against the hole wall of the mounting hole 800a. The annular surface of the positioning groove extending axially here can also be referred to as the first mating surface 122f. By providing the positioning groove, axial positioning can be achieved from the outside of the housing 120 through the mating with the fork arm 800, which also helps to reduce the space occupied by the fork arm 800 on the outer periphery of the housing 120, thereby helping to reduce the size of the vibration damper and improve the compactness of the structure.

[0111] See Figure 1 , Figure 7 and Figure 9 In one example of this application, the damping adjustable shock absorber may further include a transition joint 530. The transition joint 530 is located axially along the housing 120 between the bottom valve 110 and the second solenoid valve assembly 500. The transition joint 530 has a first through-hole 530a extending axially along the housing 120. The bottom valve 110 has a compression port 111b. The bottom valve 110 includes a compression oil connector 111d. The compression oil connector 111d defines a portion of the compression port 111b. The compression oil connector 111d is axially connected to the transition joint 530 along the housing 120 such that the compression port 111b communicates with the first through-hole 530a. The second solenoid valve assembly 500 has an oil inlet 500a. The second solenoid valve assembly 500 is axially connected to the transition joint 530 along the housing 120, and the oil inlet 500a communicates with the compression port 111b via the first through-hole 530a.

[0112] Optionally, the compression oil fitting 111d and the transition fitting 530 can be connected in a detachable manner, such as by abutting each other axially. Alternatively, the compression oil fitting 111d and the transition fitting 530 can be connected in a fixed manner, such as by welding.

[0113] In another example of this application, the second solenoid valve assembly 500 may include a transition joint 530, which is part of the second solenoid valve assembly 500. The second solenoid valve assembly 500 has an inlet port 500a and an outlet port 500b. The inlet port 500a extends at least axially within the transition joint 530. The outlet port 500b is in fluid communication with the compression chamber 100e. The bottom valve body portion 111 includes a compression through port 111d adapted to the transition joint 530. The compression port 111b extends axially and penetrates the compression through port 111d. The compression through port 111d is connected to the transition joint 530.

[0114] exist Figure 1 , Figure 7 and Figure 9 In the example shown, the second solenoid valve assembly 500 may include a second solenoid valve body 510 and an end cap 520. The end cap 520 is connected to the second solenoid valve body 510. An oil inlet port 500a penetrates the end cap 520. An end of a transition joint 530 along the axial direction of the housing 120 is detachably connected to the end cap 520. The transition joint 530 abuts against the end cap 520.

[0115] In another example, not shown, the second solenoid valve assembly 500 includes a second solenoid valve body 510 and an end cap 520 connected to the second solenoid valve body 510. An oil inlet 500a penetrates the end cap 520. The transition joint 530 and the end cap 520 are integrally constructed.

[0116] For example, the fork arm 800 has a notch 800c. The notch 800c is located on the side of the mounting hole 800a. The notch 800c radially communicates with the mounting hole 800a and the outside of the fork arm 800. The notch 800c axially penetrates the fork arm 800. The fork arm 800 includes a pair of connecting ears 800d. The pair of connecting ears 800d are located on both sides of the notch 800c. The connecting ears 800d are used to pass through fasteners such as screws. During the process of connecting the pair of connecting ears 800d with fasteners, the notch 800c decreases so that the fork arm 800 clamps the housing 120.

[0117] In addition, the damping adjustable shock absorber may also include a hydraulic pump assembly 600, a recovery accumulator 700, and a compression accumulator 710.

[0118] The hydraulic pump assembly 600 is located outside the housing 120. The hydraulic pump assembly 600 is fluidly connected to the first oil passage 122a and the second oil passage 122b. The hydraulic pump assembly 600 is used to pump oil into or from the first oil passage 122a or the second oil passage 122b. By pumping oil into the first oil passage 122a or extracting oil from the second oil passage 122b, a positive pressure difference is generated at the piston member 220 from the first working chamber 100b towards the second working chamber 100c, thereby assisting in pushing the piston member 220 to move closer to the second space, thus achieving the purpose of active retraction of the piston rod assembly 200. The process of the hydraulic pump assembly 600 pumping oil into the first oil passage 122a and the process of the hydraulic pump assembly 600 extracting oil from the second oil passage 122b can be performed simultaneously. By pumping oil into the second oil passage 122b or extracting oil from the first oil passage 122a using the hydraulic pump assembly 600, a positive pressure difference is generated at the piston member 220 from the second working chamber 100c towards the first working chamber 100b. This assists in pushing the piston member 220 to move away from the second space, thereby achieving the purpose of actively extending the piston rod assembly 200. The process of the hydraulic pump assembly 600 pumping oil into the second oil passage 122b and the process of the hydraulic pump assembly 600 extracting oil from the first oil passage 122a can be performed simultaneously.

[0119] A recovery accumulator 700 is connected in series between the hydraulic pump assembly 600 and the first chamber. The recovery accumulator 700 is used to store hydraulic fluid. For example, the recovery accumulator 700 can be used to temporarily store hydraulic fluid output from the first oil passage 122a to the outside of the housing 120. Alternatively, the recovery accumulator 700 can be used to temporarily store hydraulic fluid drawn by the hydraulic pump assembly 600 from the second oil passage 122b. Or, the recovery accumulator 700 can be used to temporarily store both hydraulic fluid output from the first oil passage 122a to the outside of the housing 120 and hydraulic fluid drawn by the hydraulic pump assembly 600 from the second oil passage 122b. A compression accumulator 710 is connected in series between the hydraulic pump assembly 600 and the compression chamber 100e. The compression accumulator 710 is used to store hydraulic fluid. For example, the compression accumulator 710 can be used to temporarily store hydraulic fluid output from the second oil passage 122b to the outside of the housing 120. For example, the compression accumulator 710 can be used to temporarily store the oil drawn from the first oil passage 122a by the hydraulic pump assembly 600. Alternatively, the compression accumulator 710 can be used to temporarily store the oil output from the second oil passage 122b to the outside of the housing 120, or it can be used to temporarily store the oil drawn from the first oil passage 122a by the hydraulic pump assembly 600.

[0120] Optionally, the damping adjustable shock absorber includes at least one recovery accumulator 700. At least one of the at least one recovery accumulator 700 is located outside the housing 120 and connected in series between the first oil passage 122a and the hydraulic pump assembly 600. A compression accumulator 710 is located outside the housing 120 and connected in series between the second oil passage 122b and the hydraulic pump assembly 600. This helps to reduce the space occupied inside the housing 120, thereby helping to improve the utilization rate of the internal space of the housing 120 and to achieve miniaturization of the external dimensions of the oil reservoir assembly 100.

[0121] In the illustrated example, the damping adjustable damper includes a restoring accumulator 700 and a compression accumulator 710. Both the restoring accumulator 700 and the compression accumulator 710 are disposed outside the housing 120.

[0122] For example, the bottom valve 110 may include a bottom valve body 111 and a compensation valve 112. The bottom valve body 111 has a compression port 111b and a compensation port 111c. The compression port 111b is in fluid communication with the second solenoid valve assembly 500 and the second working chamber 100c. The compensation port 111c is correspondingly provided with the compression chamber 100e. The compensation valve 112 is movably covered by the compensation port 111c. The compensation valve 112 is configured to open the compensation port 111c when the applied hydraulic force is axially directed toward the first space, so that the compensation port 111c is in fluid communication with the compression chamber 100e and the second working chamber 100c, thereby allowing oil to flow from the compression chamber 100e to the second working chamber 100c. The compensation valve 112 is configured to close the compensation port 111c when the applied hydraulic force is axially directed toward the second space. Compression port 111b and compensation port 111c are connected in parallel. When the hydraulic force on the bottom valve 110 is directed towards the first space, the oil in the compression chamber 100e can flow into the working cylinder 140 through the compensation port 111c. When the hydraulic force on the bottom valve 110 is directed towards the second space, the oil in the working cylinder 140 can flow into the first through port 530a through the compression port 111b, then into the second solenoid valve assembly 500, and after being throttled by the second solenoid valve assembly 500, it flows into the compression chamber 100e. The bottom valve 110 can be understood as being composed of two parallel check valves, allowing bidirectional flow of oil, only the flow paths of each flow direction are different.

[0123] For example, the piston assembly 220 includes a piston body portion 221 and a flow valve portion 222. The piston body portion 221 has a second through hole 221a. The flow valve portion 222 is movably covered by the second through hole 221a. The flow valve portion 222 is configured to open the second through hole 221a when the applied hydraulic force is applied axially toward the first working chamber 100b, so as to allow oil to flow from the second working chamber 100c to the first working chamber 100b. By providing the second through hole 221a and the flow valve portion 222, overload protection can be provided for the second working chamber 100c and even the working cylinder 140, thereby preventing the second working chamber 100c from overloading during the rapid retraction of the piston rod assembly 200.

[0124] Furthermore, the adjustable damping shock absorber may also include a guide sleeve 170. The guide sleeve 170 is connected to the working cylinder 140 and is axially located on the side of the piston assembly 220 opposite to the bottom valve 110. The piston assembly 220 is axially located between the guide sleeve 170 and the bottom valve 110. The piston rod assembly 200 may also include a rod member 210 and a limiting member 230. The rod member 210 is movably disposed through the guide sleeve 170 along the axial direction of the housing 120. The limiting member 230 is sleeved on the outside of the rod member 210. The limiting member 230 is axially located between the piston assembly 220 and the guide sleeve 170, and is axially spaced from the piston assembly 220. The radial outer dimension of the limiting member 230 is smaller than the radial inner dimension of the working cylinder 140. The axial movement of the rod member 210 can be guided by the guide sleeve 170. By providing the limiting member 230, the piston member 220 can be prevented from completely compressing the first working chamber 100b when it moves axially away from the bottom valve 110 to its limit position, thus ensuring that the first working chamber 100b always exists. Similarly, the piston rod assembly 200 may also include another limiting structure (not labeled). This limiting structure is located in the second working chamber 100c and connected to the rod member 210, and is used to prevent the piston member 220 from completely compressing the second working chamber 100c when it moves axially toward the bottom valve 110 to its limit position, thereby ensuring that the second working chamber 100c always exists. The guide sleeve 170 here can be constructed as a rubber sleeve or a combination of metal and rubber.

[0125] Furthermore, the piston rod assembly 200 may also include a buffer member 250. The buffer member 250 is located on the axial side of the limiting member 230 opposite to the bottom valve 110 and is fixed relative to the limiting member 230. The buffer member 250 is constructed as a soft, elastic structure. The soft, elastic structure can be made of materials such as rubber, silicone rubber, or silicone.

[0126] For example, both the first solenoid valve assembly 300 and the second solenoid valve assembly 500 may include a throttle valve. At least one of the first solenoid valve assembly 300 and the second solenoid valve assembly 500 includes a check valve.

[0127] Furthermore, the first solenoid valve assembly 300 includes a check valve 320 and a throttle valve 310 connected in parallel. The parallel check valve 320 and throttle valve 310 constitute a combined valve. This combined valve is connected in series between the working oil passage 140a of the working cylinder 140 and the return oil passage 122c of the housing 120. The check valve 320 allows oil to flow from the return chamber 100a into the first working chamber 100b via the intermediate chamber 100d. The throttle valve 310 throttles the oil flowing from the first working chamber 100b to the return chamber 100a via the intermediate chamber 100d. The second solenoid valve assembly 500 includes a throttle valve. The throttle valve throttles the flowing oil.

[0128] Optionally, the first solenoid valve assembly 300 and the second solenoid valve assembly 500 may be selected to employ solenoid valves with corresponding functions. By controlling the throttling performance of the first solenoid valve assembly 300 and the second solenoid valve assembly 500, the damping force and the active lifting speed of the piston rod can be adjusted.

[0129] Optionally, a mounting hole may be provided at the second axial end of the housing 120. A radially extending annular second mating surface 122g is provided within this mounting hole. The second solenoid valve assembly 500 is mounted in the mounting hole and abuts against the second mating surface 122g to prevent the second solenoid valve assembly 500 from moving towards the bottom valve 110, thereby achieving axial positioning between the second solenoid valve assembly 500 and the housing 120.

[0130] Optionally, the second solenoid valve assembly 500 can be configured as a solenoid valve. The damping adjustable shock absorber also includes a solenoid valve wiring harness 550. The solenoid valve wiring harness 550 is connected to the second solenoid valve assembly 500 and extends axially through a mounting hole 800a to the outside of the fork arm 800. For example, the solenoid valve includes a solenoid valve solenoid 560 located at the rear. The solenoid valve wiring harness 550 is connected to the solenoid valve solenoid 560 and extends to the outside by passing sequentially through a mounting hole at the second end of the housing 120 and a mounting hole 800a of the fork arm 800; this solenoid valve wiring harness 550 can be referred to as the solenoid valve wiring harness 550. The end of the battery power harness away from the solenoid valve solenoid 560 can be connected to the vehicle's wiring harness to control the operating state of the second solenoid valve assembly 500 through the vehicle's control system.

[0131] Furthermore, the adjustable damping shock absorber may also include a spring support 900. The spring support 900 is sleeved on the outside of the housing 120. In the axial direction, the first solenoid valve assembly 300 is located between the spring support 900 and the bottom valve 110, and closer to the bottom valve 110. The spring support 900 is used to define the axial position of the damping spring sleeved on the outside of the housing 120.

[0132] In the installed state of the adjustable damping shock absorber of this application, one of the reservoir cylinder assembly 100 and the piston rod assembly 200 is connected to the axle, and the other of the reservoir cylinder assembly 100 and the piston rod assembly 200 is connected to the vehicle body. A vehicle equipped with the aforementioned adjustable damping shock absorber according to this application can meet the vehicle's requirements for active damping function, thereby better adjusting the vehicle's attitude and suppressing vehicle pitch and roll.

[0133] See below for further details. Figures 1 to 9 The damping adjustable vibration damper according to this embodiment will be further described.

[0134] According to the damping adjustable shock absorber of this application, two solenoid valve assemblies are arranged for adjusting the damping force. Both solenoid valve assemblies can be solenoid valves. The second solenoid valve assembly 500 is arranged at the bottom of the shock absorber and parallel to the central axis of the shock absorber. The first solenoid valve assembly 300 is arranged on the side of the shock absorber and perpendicular to the central axis of the shock absorber. The second stop surface 111a separates the recovery chamber 100a and the compression chamber 100e into two independent chambers. The first oil inlet / outlet port 150a leads out from the recovery chamber 100a, and the second oil inlet / outlet port 150b leads out from the compression chamber 100e. The first oil inlet / outlet port 150a and the second oil inlet / outlet port 150b are distributed on both sides of the second stop surface 111a along the central axis of the shock absorber. This application includes a hydraulic pump and two accumulators. The recovery chamber 100a and the compression chamber 100e are connected by a hydraulic pump assembly 600. A recovery accumulator 700 is disposed between the recovery chamber 100a and the hydraulic pump assembly 600. A compression accumulator 710 is disposed between the compression chamber 100e and the hydraulic pump assembly 600. At least one accumulator is disposed outside the shock absorber. Due to the small volume of the compression chamber 100e, the accumulator cannot be disposed inside the compression chamber 100e, so the accumulator is disposed outside the shock absorber. Due to the large volume of the recovery chamber 100a, the accumulator can be disposed inside the recovery chamber 100a, or alternatively, the accumulator can be disposed outside the shock absorber.

[0135] According to the damping adjustable shock absorber of this application, the oil reservoir 121, base 122, spring support seat 900, valve seat 160, and oil pipe connecting block 150 constitute the oil reservoir assembly 100, which can be connected by welding. The piston component 220, limiting component 230, buffer component 250, guide sleeve 170, oil seal assembly 171, and rod component 210 constitute the connecting rod piston assembly, and the working cylinder 140, intermediate cylinder 130, bottom valve 110, and compensating valve part 112 constitute the working cylinder bottom valve assembly. The working cylinder bottom valve assembly is mounted on the first stop surface 122d of the base 122 via the bottom valve 110. The connecting rod piston assembly engages with the inner wall shaft hole of the working cylinder 140 via the outer circular surface of the piston component 220. The first outer mating surface 170a engages with the upper port shaft hole of the intermediate cylinder 130. The second outer mating surface 170b engages with the upper port shaft hole of the working cylinder 140. The third outer mating surface 170c of the guide sleeve 170 engages with the inner wall shaft hole of the oil reservoir 121. The sealing flange of the oil reservoir cavity of the oil reservoir 121 is in close contact with the upper end face of the oil seal assembly 171, thereby constraining and locking the connecting rod piston assembly and the working cylinder bottom valve assembly in the oil reservoir assembly 100.

[0136] The first solenoid valve assembly 300 is installed in the valve seat 160. The second solenoid valve assembly 500 is arranged at the bottom of the shock absorber, parallel to the central axis of the shock absorber. The second solenoid valve assembly 500 is connected to the compression oil inlet 111d of the bottom valve 110 via a transition joint 530 and sealed by a sealing ring. The end cap 520 is in contact with the end face of the transition joint 530. This arrangement allows the oil in the second working chamber 100c to flow into the second solenoid valve assembly 500 through the compression hole 111b. The upper end face of the transition joint 530 supports and abuts against the lower end face of the bottom valve 110 to achieve axial positioning of the second solenoid valve assembly 500. The second solenoid valve assembly 500 is connected to the solenoid valve mating surface of the base 122 via a threaded fastening to achieve radial positioning and locking of the second solenoid valve assembly 500. The second solenoid valve assembly 500 is provided with a sealing ring to achieve sealing between the solenoid valve housing and the inner hole of the base 122. The solenoid valve solenoid 560 is locked and secured to the solenoid valve housing by a snap ring. The outer surface of the solenoid valve solenoid 560 mates with the shaft hole of the second mating surface 122g of the base 122, and the two can be sealed with sealant to prevent external impurities such as sand, dust, and water from entering the interior of the second solenoid valve assembly 500. The first port 122h of the base 122 is in contact with the lower port of the oil reservoir 121 and is locked by welding. The base 122 mates with the shaft hole of the inner hole of the fork arm 800 through the first mating surface 122f to achieve radial positioning, and the third stop surface 122e mates with the fourth stop surface 800b to achieve axial positioning. The fork arm 800 has a notch 800c to facilitate the insertion of the base 122 into the inner hole mating surface of the fork arm 800. After the base 122 is inserted into the inner hole mating surface of the fork arm 800, the locking bolts of the fork arm 800 are installed and tightened to clamp and lock the base 122 in the fork arm 800. The solenoid valve wiring harness 550 is led out from the lower end face of the solenoid valve solenoid tube 560, passes through the second port 122m of the fork arm 800, and then extends the solenoid valve wiring harness 550 to the outside of the shock absorber to connect with the vehicle wiring harness. The second port 122m here is the connection hole mentioned above.

[0137] The second stop surface 111a of the bottom valve 110 is a 360° annular spherical or conical surface, and the first stop surface 122d of the base 122 is also a 360° annular spherical or conical surface. When the second stop surface 111a and the first stop surface 122d are in close contact, they separate the restoration chamber 100a and the compression chamber 100e into two independent chambers. The base 122 has a first oil passage hole 122a and a second oil passage hole 122b, which are distributed on both sides of the first stop surface 122d along the central axis of the base 122. The oil pipe connecting block 150 is in close contact with the base 122 and connected by welding. The first inlet / outlet oil hole 150a is aligned and connected to the first oil passage hole 122a, and the second inlet / outlet oil hole 150b is aligned and connected to the second oil passage hole 122b. One end of the first oil pipe 720 is connected to the first inlet / outlet port 150a, and the other end is connected to one inlet / outlet port 500b of the hydraulic pump. One end of the second oil pipe 730 is connected to the second inlet / outlet port 150b, and the other end is connected to another inlet / outlet port 500b of the hydraulic pump. The compression accumulator 710 is connected to the second oil pipe 730 and is located outside the shock absorber. The recovery accumulator 700 is connected to the first oil pipe 720 and can be located outside the shock absorber or integrated into the recovery cavity 100a in the form of an air bag.

[0138] This application defines the upper end of the first solenoid valve assembly 300 based on the cooperative operation of the bottom valve 110 and the first solenoid valve assembly 300. Here, the upper end of the solenoid valve assembly 300 is the end facing the bottom valve 110. The lower end of the solenoid valve assembly 300 abuts against the lower end face of the base 122, i.e., the third stop surface 122e. This ensures reliable installation of the solenoid valve assembly 300 without the need for additional structural fixing. Furthermore, the cooperation between the lower end face of the base 122 and the fork arm 800 also ensures the stability of the housing 120.

[0139] During the compression stroke, the piston assembly 220 moves closer to the bottom valve 110, causing the volume of the second working chamber 100c to decrease. During this process, the oil in the second working chamber 100c flows through the compression hole 111b into the transition joint 530; then into the second solenoid valve assembly 500, where it is throttled before flowing out from the oil outlet hole 500b into the compression chamber 100e; then through the second inlet / outlet oil holes 150b into the second oil pipe 730; and finally into the compression accumulator 710. The compression accumulator 710 absorbs and holds the oil during the compression stroke. The movement of the piston assembly 220 closer to the bottom valve 110 causes the volume of the first working chamber 100b to increase. During this process, the oil in the recovery chamber 100a enters the intermediate oil passage hole 130a through the check valve 320; then flows through the intermediate chamber 100d into the oil passage hole of the working cylinder 140; finally, the oil fills the first working chamber 100b. During the compression stroke, the accumulator 700 releases oil. When the compression stroke is very fast, some of the high-pressure oil in the second working chamber 100c can push open the flow valve 222 of the piston component 220 and enter the first working chamber 100b. The flow valve 222 serves as overload protection. The compression damping force can be controlled and adjusted by the second solenoid valve assembly 500.

[0140] During the recovery stroke, piston component 220 moves away from bottom valve 110, reducing the volume of the first working chamber 100b. During this process, oil in the first working chamber 100b flows into the intermediate chamber 100d through the oil passage of the working cylinder 140; then it enters the first solenoid valve assembly 300 through the intermediate oil passage 130a; the oil is throttled by the first solenoid valve assembly 300 before flowing into the recovery chamber 100a. The recovery accumulator 700 absorbs oil during the recovery stroke. The movement of piston component 220 away from bottom valve 110 causes the volume of the second working chamber 100c to increase. During this process, oil in the compression chamber 100e passes through the bottom valve 110 compensation hole 111c and pushes open the compensation valve part 112, eventually filling the second working chamber 100c. The compression accumulator 710 releases oil during the recovery stroke. The recovery damping force can be controlled and adjusted by the first solenoid valve assembly 300.

[0141] During rapid lifting, the hydraulic pump assembly 600 pumps high-pressure oil into the second oil pipe 730, and the high-pressure oil enters the compression chamber 100e; then it passes through the bottom valve 110 compensation hole 111c of the bottom valve 110 and pushes open the compensation valve part 112; the second working chamber 100c is filled with high-pressure oil. At this time, the oil pressure in the first working chamber 100b is relatively low, and the pressure difference will generate an upward thrust on the piston component 220, thereby rapidly lifting the rod component 210. The oil in the first working chamber 100b flows into the intermediate chamber 100d through the oil passage of the working cylinder 140; then it enters the first solenoid valve assembly 300 through the intermediate oil passage 130a; the oil is throttled by the first solenoid valve assembly 300 and then flows into the recovery chamber 100a. At this time, the throttling capacity of the first solenoid valve assembly 300 is set to the weakest to facilitate the generation of lifting force of the rod component 210. Simultaneously, the hydraulic pump assembly 600 extracts oil from the recovery chamber 100a through the first oil pipe 720 and pumps it into the second oil pipe 730. During the lifting stroke, the oil in the first working chamber 100b is circulated and pumped to the second working chamber 100c by the hydraulic pump assembly 600.

[0142] During rapid descent, the hydraulic pump assembly 600 pumps high-pressure oil into the first oil pipe 720, which then enters the recovery chamber 100a. The oil then passes through the check valve 320 into the intermediate oil passage 130a, and then flows through the intermediate chamber 100d into the oil passage of the working cylinder 140. Finally, the first working chamber 100b is filled with high-pressure oil. At this time, the oil pressure in the second working chamber 100c is relatively low, and the pressure difference generates a downward thrust on the piston component 220, causing the rod component 210 to descend rapidly. The oil in the second working chamber 100c flows into the transition joint 530 through the compression hole 111b, and then into the second solenoid valve assembly 500. The oil is throttled by the second solenoid valve assembly 500 and then flows out from the oil outlet 500b into the compression chamber 100e. At this time, the throttling capacity of the second solenoid valve assembly 500 is set to its weakest value to facilitate the generation of the descent force of the rod component 210. Simultaneously, the hydraulic pump assembly 600 draws oil from the compression chamber 100e through the second oil pipe 730 and pumps it into the first oil pipe 720. During the descent stroke, the oil in the second working chamber 100c is circulated and pumped to the first working chamber 100b by the hydraulic pump assembly 600.

[0143] The adjustable damping shock absorber according to this application is equipped with two solenoid valve assemblies, allowing the restoring damping force and compression damping force to be independently adjustable. The second solenoid valve assembly 500 is arranged at the bottom of the shock absorber, and the first solenoid valve assembly 300 is arranged on the side of the shock absorber, occupying a small amount of circumferential space on the side of the shock absorber. The adjustable damping shock absorber of this application is equipped with two accumulators and a hydraulic pump assembly 600, and has rapid lifting and rapid lowering functions. The restoring chamber 100a and the compression chamber 100e are distributed on both sides of the bottom valve 110 along the direction of the shock absorber's central axis. At least one accumulator is arranged outside the shock absorber, which can reduce the radial or axial dimensions of the shock absorber, facilitating the installation and arrangement of the shock absorber on the vehicle chassis suspension.

[0144] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “setup” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0145] This application has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. A damping adjustable vibration damper, characterized in that, The adjustable damping shock absorber includes: A housing having an internal space for accommodating oil and a first stop surface formed in the internal space, the first stop surface being arranged intersecting the axial direction of the housing; A bottom valve is located in the internal space of the housing and divides the internal space into a first space and a second space arranged along the axial direction. The bottom valve includes a second stop surface that abuts against the first stop surface to prevent the bottom valve from moving toward the second space along the axial direction of the housing. A working cylinder, located in the first space and abutting against the bottom valve, to prevent the bottom valve from moving axially toward the first space along the housing; and A second solenoid valve assembly, located in the second space and axially connected to the bottom valve along the housing, defines the axial position of the second solenoid valve assembly within the housing. The bottom valve includes: A bottom valve body portion having a compression port and a compensation port, the compression port being in fluid communication with the second solenoid valve assembly and the first space, the compensation port being offset from the compression port; and A compensation valve is movably disposed over the compensation hole, the compensation valve being configured to open the compensation hole when the applied hydraulic force is directed toward the first space along the axial direction, and to close the compensation hole when the applied hydraulic force is directed toward the second space along the axial direction.

2. The damping adjustable vibration damper according to claim 1, characterized in that, The damping adjustable shock absorber also includes an intermediate cylinder, which is located in the first space and sleeved on the outside of the working cylinder. The intermediate cylinder is connected to the bottom valve along the axial direction of the housing.

3. The damping adjustable vibration damper according to claim 2, characterized in that, The bottom valve has a first stop and a second stop on its outer peripheral surface. The first stop is further away from the second space than the second stop along the axial direction of the housing. The first stop cooperates with the end of the working cylinder to limit the position of the working cylinder along the axial direction and the radial direction of the housing. The second stop cooperates with the end of the intermediate cylinder to limit the position of the intermediate cylinder along the axial direction and the radial direction of the housing.

4. The damping adjustable vibration damper according to any one of claims 1 to 3, characterized in that, The housing has a first end and a second end that are opposite in the axial direction, and the end of the second end of the housing is provided with a third stop surface that intersects the axial direction of the housing; The damping adjustable shock absorber also includes a fork arm, which has a mounting hole. The mounting hole includes a first hole section and a second hole section. The inner diameter of the second hole section is smaller than the inner diameter of the first hole section. The first hole section allows the second end of the housing to be inserted. A fourth stop surface is formed between the first hole section and the second hole section. The fourth stop surface abuts against the third stop surface.

5. The damping adjustable vibration damper according to claim 4, characterized in that, A connecting hole is provided at the end of the second end of the housing. The connecting hole extends along the axial direction of the housing and communicates with the internal space. The inner diameter of the second hole segment is greater than or equal to the inner diameter of the connecting hole. The third stop surface is arranged around the connecting hole.

6. The damping adjustable vibration damper according to claim 5, characterized in that, The outer peripheral surface of the second end of the housing is provided with a first mating surface extending circumferentially. The first mating surface extends axially along the housing to the third stop surface. The third stop surface is used to approach or abut against the inner wall of the first hole segment. The diameter of the first mating surface is smaller than the radial outer dimension of the rest of the housing.

7. The damping adjustable vibration damper according to claim 6, characterized in that, The length of the third stop surface along the axial direction of the housing is greater than the depth of the first hole.

8. The damping adjustable vibration damper according to claim 1, characterized in that, The damping adjustable shock absorber also includes a transition joint, which is located between the bottom valve and the second solenoid valve assembly along the axial direction of the housing, and the transition joint has a first through hole extending along the axial direction of the housing; The bottom valve includes a compression oil passage connector, at least a portion of the compression hole is disposed through the compression oil passage connector along the axial direction, and the compression oil passage connector is connected to the transition connector along the axial direction of the housing, so that the compression hole communicates with the first through hole; The second solenoid valve assembly has an oil inlet port, which is axially connected to the transition joint along the housing, and the oil inlet port communicates with the compression port via the first through hole.

9. The damping adjustable vibration damper according to claim 1, characterized in that, The second solenoid valve assembly includes a transition joint, and the second solenoid valve assembly has an oil inlet hole, at least a portion of which is disposed through the transition joint along the axial direction; the bottom valve body includes a compression oil passage joint adapted to the transition joint, at least a portion of which is disposed through the compression oil passage joint along the axial direction, and the compression oil passage joint is connected to the transition joint.

10. The damping adjustable vibration damper according to claim 8, characterized in that, The second solenoid valve assembly includes a second solenoid valve body and an end cap, the end cap being connected to the second solenoid valve body, the oil inlet penetrating the end cap, and the end of the transition joint along the axial direction of the housing being detachably connected to the end cap. The transition joint abuts against the end cap.

11. The damping adjustable vibration damper according to claim 9, characterized in that, The second solenoid valve assembly also includes a second solenoid valve body and an end cap, the end cap being connected to the second solenoid valve body, the oil inlet penetrating the end cap, and the transition joint and the end cap being integrally constructed.

12. The damping adjustable vibration damper according to claim 4, characterized in that, The fork arm also has a notch located on the side of the mounting hole. The notch is radially connected to the mounting hole and the outside of the fork arm, and axially penetrates the fork arm. The fork arm includes a pair of connecting ears located on both sides of the notch. The connecting ears are used to connect fasteners to clamp the housing.

13. The damping adjustable vibration damper according to any one of claims 1 to 3, characterized in that, The working cylinder divides the first space into a first cavity and a working cavity arranged radially from the outside to the inside. The housing has a first oil passage hole and a second oil passage hole spaced apart along the axial direction. The first oil passage hole is in fluid communication with the outside of the first cavity and the housing, and the second oil passage hole is in fluid communication with the outside of the second space and the housing. The adjustable damping shock absorber also includes: A piston rod assembly, the piston rod assembly including a piston member located in the working chamber to divide the working chamber into a first working chamber and a second working chamber, the second working chamber being closer to the bottom valve along the axial direction than the first working chamber, the first working chamber being in fluid communication with the first chamber. The bottom valve is configured such that: when the hydraulic force acting on the bottom valve is directed toward the first space along the axial direction, the bottom valve allows oil to flow from the second space into the second working chamber; and when the hydraulic force acting on the bottom valve is directed toward the second space along the axial direction, the bottom valve allows oil to flow from the second working chamber into the second space.

14. The damping adjustable vibration damper according to claim 13, characterized in that, The second solenoid valve assembly, the bottom valve, and the housing together form a compression chamber, which is fluidly connected to the outside of the housing via the second oil passage, and the second solenoid valve assembly is connected in series between the compression chamber and the bottom valve; The damping adjustable shock absorber also includes a first solenoid valve assembly, which is connected to the outer side of the housing and is connected in series between the first cavity and the first working cavity.

15. The damping adjustable vibration damper according to claim 14, characterized in that, The adjustable damping shock absorber also includes: A hydraulic pump assembly is located outside the housing and is in fluid communication with the first oil passage and the second oil passage. The hydraulic pump assembly is used to pump oil into the first oil passage or the second oil passage and to extract oil from the first oil passage or the second oil passage. A recovery accumulator, connected in series between the hydraulic pump assembly and the first chamber, is used to store oil; and A compression accumulator is connected in series between the hydraulic pump assembly and the compression chamber, and the compression accumulator is used to store oil.

16. The damping adjustable vibration damper according to claim 13, characterized in that, The piston component includes: The piston body portion, wherein the piston body portion is provided with a second through hole; and A flow valve is movably disposed over the second through hole. The flow valve is configured to open the second through hole when subjected to a hydraulic force along the axial direction toward the first working chamber, so as to allow oil to flow from the second working chamber to the first working chamber.

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