Damping adjustment module and vehicle

Abstract

The utility model discloses a damping adjusting module and a vehicle. The damping adjusting module comprises a shell, a damping component and a damping component, the piston valve assembly divides an inner cavity of the shell into a compression cavity and a recovery cavity, the built-in valve assembly comprises a built-in valve body, an overflow valve body and an overflow valve seat structure, and the built-in valve body and the overflow valve seat structure form a first channel communicating between the compression cavity and the recovery cavity. The overflow valve body can move to adjust the circulation damping of the first channel; the driving assembly is used for driving the overflow valve body to move in the direction close to the overflow valve seat structure; and the elastic structure is pressed between the built-in valve body and the overflow valve body in an abutting mode, and the elastic structure is used for applying elastic force to the overflow valve body, and the elastic force moves in the direction away from the overflow valve seat structure. According to the damping adjusting module, the flow of oil can be changed, namely the damping force can be changed, the hardness of a shock absorber can be adjusted, and the riding comfort of a vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a damping adjustment module and a vehicle with the damping adjustment module. Background Art

[0002] A shock absorber is installed in the wheel area of a vehicle to reduce the bumps during vehicle driving. The existing shock absorbers have different hardness levels. When the shock absorber is harder, the driver can more accurately perceive the dynamics of the vehicle, thereby improving the vehicle's handling performance. It can also quickly stabilize the vehicle body when the vehicle is driving at high speed or turning, reduce the body sway, and enhance the vehicle's stability. Moreover, in certain specific situations, the hard shock absorber may be more durable because the stress borne by the hard shock absorber during movement is smaller, reducing the wear of internal components. However, the hard shock absorber is not as effective as the soft shock absorber in absorbing road surface impacts. Therefore, when the vehicle is driving on an uneven or rough road surface, the vehicle occupants may feel more bumps and vibrations, significantly reducing the riding comfort of the vehicle, and there is room for improvement. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a damping adjustment module, which can change the flow rate of the hydraulic fluid, that is, change the damping force, and further adjust the hardness of the shock absorber, improving the riding comfort of the vehicle and being beneficial to enhancing user satisfaction.

[0004] The damping adjustment module according to an embodiment of the utility model includes: a housing; a piston valve assembly, an internal valve assembly, and a piston rod. The piston valve assembly is installed in the housing and divides the inner cavity of the housing into a compression chamber and a recovery chamber. The internal valve assembly includes an internal valve body, an overflow valve body, and an overflow valve seat structure. The internal valve body is located in the recovery chamber and is connected between the piston valve assembly and the piston rod. The overflow valve body and the overflow valve seat structure are both installed on the internal valve body. A first channel communicating between the compression chamber and the recovery chamber is formed between the internal valve body and the overflow valve seat structure. The overflow valve body is movable relative to the internal valve body to adjust the flow damping of the first channel; a driving component for driving the overflow valve body to move towards the overflow valve seat structure; and an elastic structure pressing between the internal valve body and the overflow valve body, and the elastic structure is used to apply an elastic force to the overflow valve body to move away from the overflow valve seat structure.

[0005] According to the damping adjustment module of the embodiment of the present utility model, the overflow valve body can be driven to move in different directions through the driving component and the elastic structure, so that the first channel is closed or opened, thereby the flow rate of the hydraulic oil can be changed, that is, the damping force can be changed, and further the hardness of the shock absorber can be adjusted, which can improve the riding comfort of the vehicle and is beneficial to improving user satisfaction.

[0006] According to the damping adjustment module of some embodiments of the present utility model, an installation groove is provided on the inner peripheral wall of the built-in valve body, and the elastic structure is configured as an elastic reed installed in the installation groove, and the elastic reed axially presses against the overflow valve body to apply an elastic force to the overflow valve body.

[0007] According to the damping adjustment module of some embodiments of the present utility model, the overflow valve seat structure includes an overflow valve seat and an overflow valve plate. The overflow valve seat is connected to the built-in valve body. The overflow valve seat is formed with a first communication hole communicating with the compression cavity. The overflow valve plate is provided with a second communication hole communicating with the first communication hole. The first communication hole and the second communication hole together constitute the first channel. The overflow valve body moves relative to the overflow valve plate so that the second communication hole selectively communicates with the recovery cavity.

[0008] According to the damping adjustment module of some embodiments of the present utility model, the overflow valve seat is provided with an overflow groove communicating between the first communication hole and the recovery cavity, and the flow area of the overflow groove is smaller than the flow area of the second communication hole.

[0009] According to the damping adjustment module of some embodiments of the present utility model, at least part of the recovery cavity is distributed around the overflow valve seat. There are a plurality of the overflow grooves. The plurality of overflow grooves are spaced apart along the circumferential direction of the overflow valve seat and respectively communicate between the first communication hole and the recovery cavity.

[0010] According to the damping adjustment module of some embodiments of the present utility model, a first gap is formed between the overflow valve seat and the overflow valve plate. At least part of the recovery cavity is distributed around the first gap. The driving component is adapted to push the overflow valve body to press against the overflow valve plate and close the first gap. The pressure in the recovery cavity is adapted to push the overflow valve body to overcome the driving force of the driving component so that the first gap is opened and communicates between the first communication hole and the recovery cavity.

[0011] The damping adjustment module according to some embodiments of the present utility model further includes a pilot valve plug, and the driving assembly is adapted to drive the pilot valve plug to push the overflow valve body towards the overflow valve plate for pressing; wherein, a middle overflow space is formed between the overflow valve body and the built-in valve body, and the middle overflow space is communicated between the second communication hole and the restoration cavity, and the pilot valve plug is adapted to close the middle overflow space under the action of the driving assembly and conduct the middle overflow space under the action of the pressure in the restoration cavity.

[0012] In the damping adjustment module according to some embodiments of the present utility model, the middle overflow space includes a throttle hole, a middle hole and an axial through hole. The throttle hole is arranged in the built-in valve body and communicated with the restoration cavity. The axial through hole is arranged in the overflow valve body and communicated with the second communication hole. The middle hole is arranged in the overflow valve body and opens towards the pilot valve plug along the axis of the overflow valve body. The middle hole is used to communicate the throttle hole with the axial through hole, and the pilot valve plug is adapted to close or conduct the middle hole.

[0013] In the damping adjustment module according to some embodiments of the present utility model, the middle overflow space further includes a communication cavity, the communication cavity is located between the overflow valve body and the built-in valve body, the inner end of the throttle hole is communicated with the communication cavity, and the overflow valve body is further provided with a radial through hole for communicating the communication cavity with the middle hole.

[0014] The damping adjustment module according to some embodiments of the present utility model further includes a first elastic member and a second elastic member. The driving assembly includes an electromagnetic coil and a magnetic core. The magnetic core is connected to the pilot valve plug. The electromagnetic coil is adapted to drive the magnetic core to drive the pilot valve plug to move towards the overflow valve body when powered on; wherein, the first elastic member is used to apply an elastic force to the magnetic core away from the overflow valve seat, and the second elastic member is used to apply an elastic force to the magnetic core towards the overflow valve seat, and when the electromagnetic coil is not powered on, the magnetic core is adapted to be in the middle position in the movement direction under the action of the first elastic member and the second elastic member.

[0015] In the damping adjustment module according to some embodiments of the present utility model, both the first communication hole and the second communication hole are multiple. The multiple first communication holes are spaced apart in the circumferential direction of the overflow valve seat, and the multiple second communication holes are spaced apart in the circumferential direction of the overflow valve plate; wherein, the multiple first communication holes and the multiple second communication holes are arranged opposite to each other along the axis of the overflow valve seat one by one.

[0016] According to some embodiments of the utility model, the damping adjustment module also includes a guide limiting structure, which includes a guide bolt and a limiting nut, and the guide bolt includes a rod body and a bolt head, and the bolt head is connected to one end of the rod body, and the rod body is sequentially penetrated through the overflow valve plate and the overflow valve seat; wherein, the bolt head is limited and pressed against the end of the overflow valve plate away from the overflow valve seat, and the limiting nut is connected to the other end of the rod body and is located at the end of the overflow valve seat away from the overflow valve plate, and an elastic return member is also provided between the limiting nut and the overflow valve seat.

[0017] The utility model also provides a vehicle.

[0018] The vehicle according to the embodiment of the utility model is provided with any one of the damping adjustment modules described above.

[0019] The advantages of the vehicle and the damping adjustment module described above compared to the prior art are the same and will not be elaborated here.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 The structure of the damping adjustment module according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 2 The structure of the damping adjustment module according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0024] Figure 3 The structure of the damping adjustment module according to the embodiment of the utility model is shown in FIG. Figure 3 ;

[0025] Figure 4 The structure of the damping adjustment module according to the embodiment of the utility model is shown in FIG. Figure 4 ;

[0026] Figure 5 The structure of the damping adjustment module according to the embodiment of the utility model is shown in FIG. Figure 5 ;

[0027] Figure 6 It is a structural schematic diagram of a piston rod according to an embodiment of the utility model;

[0028] Figure 7 is a schematic structural diagram of an iron core cover according to an embodiment of the present utility model;

[0029] Figure 8 is a schematic diagram of the cooperation between the iron core cover and the upper guide sleeve according to an embodiment of the present utility model;

[0030] Figure 9 is a schematic diagram of the cooperation between the magnetic core and the pilot valve plug according to an embodiment of the present utility model;

[0031] Figure 10 is a schematic structural diagram of an overflow valve body according to an embodiment of the present utility model;

[0032] Figure 11 is a cross-section of the overflow valve body according to an embodiment of the present utility model Figure 1 ;

[0033] Figure 12 is a cross-section of the overflow valve body according to an embodiment of the present utility model Figure 2 ;

[0034] Figure 13 is a schematic structural diagram of an upper valve body according to an embodiment of the present utility model;

[0035] Figure 14 is a schematic structural diagram of a lower valve body according to an embodiment of the present utility model;

[0036] Figure 15 is a cross-sectional view of the lower valve body according to an embodiment of the present utility model;

[0037] Figure 16 is a schematic diagram of the cooperation between the built-in valve body and the upper guide sleeve according to an embodiment of the present utility model;

[0038] Figure 17 is a schematic structural diagram of a guide bolt according to an embodiment of the present utility model;

[0039] Figure 18 is a schematic structural diagram of an overflow valve plate according to an embodiment of the present utility model;

[0040] Figure 19 is a schematic structural diagram of an overflow valve seat according to an embodiment of the present utility model;

[0041] Figure 20 is a schematic diagram of the cooperation between the overflow valve plate and the overflow valve seat and the guide limiting structure Figure 1 ;

[0042] Figure 21 is a schematic diagram of the cooperation between the overflow valve plate and the overflow valve seat and the guide limiting structure Figure 2 ;

[0043] Figure 22 Schematic diagram of the cooperation between the overflow valve plate and the overflow valve seat and the guiding and limiting structure according to an embodiment of the present utility model Figure 3 ;

[0044] Figure 23 Schematic diagram of the cooperation between the overflow valve plate and the overflow valve seat and the guiding and limiting structure according to an embodiment of the present utility model Figure 4 ;

[0045] Figure 24 Schematic diagram of the structure of the elastic structure according to an embodiment of the present utility model.

[0046] Reference numerals:

[0047] Damping adjustment module 100,

[0048] Shell 1, compression chamber 11, restoration chamber 12, inner shell 13, outer shell 14, liquid storage chamber 15,

[0049] Piston rod 2, sealing ring 21, upper guide sleeve 221, lower guide sleeve 222, piston valve assembly 3,

[0050] Built-in valve assembly 4, built-in valve body 41, upper valve body 411, lower valve body 412, installation groove 413, overflow valve body 42, radial through hole 421, overflow valve seat structure 43, overflow valve seat 431, first communication hole 4311, overflow groove 4312, overflow valve plate 432, second communication hole 4321, first gap 45, middle overflow space 46, throttle hole 461, middle hole 462, axial through hole 463, communication cavity 464, first channel 47,

[0051] Drive assembly 5, electromagnetic coil 51, magnetic core 52, coil bracket 53, coil metal cap 54, magnetic isolation ring 55, iron core cover 56,

[0052] Elastic structure 6, first elastic member 61, second elastic member 62,

[0053] Pilot valve plug 7, guiding and limiting structure 8, guiding bolt 81, rod body portion 811, bolt head 812, limiting nut 82, elastic return member 83, bottom valve assembly 9. Detailed implementation manners

[0054] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0055] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0056] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] Unless otherwise specified, the front-rear direction in this application is the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction is the transverse direction of the vehicle, i.e., the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e., the Z direction.

[0058] The following refers to Figures 1 - 24 Describe the damping adjustment module 100 according to an embodiment of the present utility model. Through the driving component 5 and the elastic structure 6, the overflow valve body 42 can be driven to move in different directions, so that the first channel 47 is closed or opened, thereby changing the flow rate of the oil fluid, that is, changing the damping force, and further adjusting the hardness of the shock absorber, which can improve the riding comfort of the vehicle and is beneficial to improving user satisfaction.

[0059] As Figures 1 - 24 As shown, the damping adjustment module 100 according to an embodiment of the present utility model includes: a housing 1, a piston valve assembly 3, an internal valve assembly 4, a piston rod 2, a driving component 5, and an elastic structure 6.

[0060] The piston valve assembly 3 is installed inside the housing 1 and divides the inner cavity of the housing 1 into a compression chamber 11 and a restoration chamber 12. The built-in valve assembly 4 includes a built-in valve body 41, an overflow valve body 42, and an overflow valve seat structure 43. The built-in valve body 41 is located in the restoration chamber 12 and is connected between the piston valve assembly 3 and the piston rod 2. Both the overflow valve body 42 and the overflow valve seat structure 43 are installed on the built-in valve body 41. A first passage 47 communicating between the compression chamber 11 and the restoration chamber 12 is formed between the built-in valve body 41 and the overflow valve seat structure 43. The overflow valve body 42 is movable relative to the built-in valve body 41 to adjust the flow damping of the first passage 47; the driving assembly 5 is used to drive the overflow valve body 42 to move in a direction approaching the overflow valve seat structure 43; the elastic structure 6 presses between the built-in valve body 41 and the overflow valve body 42, and the elastic structure 6 is used to apply an elastic force to the overflow valve body 42 to move in a direction away from the overflow valve seat structure 43.

[0061] Specifically, the damping adjustment module 100 can be used to adjust the hardness of the shock absorber. A housing 1 is provided inside the damping adjustment module 100. The housing 1 is used to provide an installation space for the components inside the damping adjustment module 100. By arranging the piston valve assembly 3 inside the housing 1, the installation of the piston valve assembly 3 can be achieved. And the piston valve assembly 3 can divide the inner cavity of the housing 1 into a compression chamber 11 and a restoration chamber 12. Both the compression chamber 11 and the restoration chamber 12 are filled with hydraulic oil. Thus, the compression chamber 11 and the restoration chamber 12 can be separated by the piston valve assembly 3 to prevent interference between them, resulting in the mixing of hydraulic oil with different pressures in the compression chamber 11 and the restoration chamber 12. Moreover, the piston valve assembly 3 is movable relative to the housing 1, that is, the piston valve assembly 3 can move up and down relative to the housing 1 inside the housing 1 to change the hydraulic oil pressure in the compression chamber 11 and the restoration chamber 12, thereby driving the hydraulic oil to flow between the compression chamber 11 and the restoration chamber 12.

[0062] At the same time, by arranging the built-in valve body 41 in the restoration chamber 12, the built-in valve body 41 can also be installed inside the housing 1. And by connecting the built-in valve body 41 between the piston valve assembly 3 and the piston rod 2, the built-in valve body 41 can be arranged between the piston rod 2 and the piston valve assembly 3 and connected to the piston rod 2 and the piston valve assembly 3 respectively, so that the piston rod 2, the built-in valve body 41, and the piston valve assembly 3 form a moving assembly and can move up and down relative to the housing 1. Moreover, part of the piston rod 2 extends into the housing 1 to be connected to the built-in valve body 41. When the piston rod 2 moves up and down relative to the housing 1, the piston valve assembly 3 can be driven by the built-in valve body 41, causing the hydraulic oil pressure in the compression chamber 11 and the restoration chamber 12 to change accordingly, and then enabling the hydraulic oil to flow between the compression chamber 11 and the restoration chamber 12.

[0063] Among them, it should be noted that the part of the piston rod 2 outside the housing 1 and the housing 1 can be respectively connected to different components on the vehicle to realize the installation of the damping adjustment module 100 on the vehicle. The piston rod 2 is a hollow structure, and the built-in valve body 41 includes an upper valve body 411 and a lower valve body 412. The upper valve body 411 and the lower valve body 412 are fixedly connected, so that an external thread is formed on the outer peripheral wall of the upper valve body 411, and an internal thread is formed on the inner peripheral wall of the piston rod 2. The connection between the piston rod 2 and the built-in valve body 41 can be realized by means of thread fitting, so that the piston rod 2 can drive the built-in valve body 41 to move.

[0064] Moreover, by installing both the overflow valve body 42 and the overflow valve seat structure 43 in the built-in valve body 41, the built-in valve body 41 can be constructed as a hollow structure to realize the installation of the overflow valve body 42 and the overflow valve seat structure 43. And as Figures 1 - 5 shown, the overflow valve seat structure 43 is threadedly connected to the lower valve body 412, that is, the overflow valve seat structure 43 is relatively fixed to the built-in valve body 41. Thus, the built-in valve body 41 can drive the overflow valve seat structure 43 to move under the action of the piston rod 2. In addition, a first channel 47 is formed between the built-in valve body 41 and the overflow valve seat structure 43, and the first channel 47 communicates between the compression chamber 11 and the recovery chamber 12, so that the oil can flow between the compression chamber 11 and the recovery chamber 12 along the first channel 47. Moreover, the overflow valve body 42 can move relative to the built-in valve body 41 to adjust the flow damping of the first channel 47, and then the hardness of the shock absorber can be adjusted. When the first channel 47 is closed, the oil flow is small, the damping force is large, and the shock absorber is hard. When the first channel 47 is opened, the oil flow is large, the damping force is small, and the shock absorber is soft.

[0065] Among them, it should be noted that as Figures 1 - 5 shown, the overflow valve body 42 is arranged inside the upper valve body 411 and is in sealing cooperation with the upper valve body 411 to prevent liquid leakage.

[0066] Furthermore, a driving component 5 and an elastic structure 6 are also arranged in the damping adjustment module 100. The driving component 5 is arranged inside the piston rod 2 and is used to generate an electromagnetic force when energized to drive the overflow valve body 42 to move downward, as Figures 1 - 5As shown, the driving component, the overflow valve body 42, and the overflow valve seat structure 43 are arranged in sequence in the up and down direction. That is, the driving component 5 can drive the overflow valve body 42 to move towards the direction close to the overflow valve seat structure 43. At this time, the first channel 47 can be closed, so that the oil fluid cannot flow through the first channel 47, the flow rate of the oil fluid is small, and the hardness of the shock absorber is relatively hard. At the same time, the elastic structure 6 is arranged inside the built-in valve body 41, and the elastic structure 6 is pressed between the built-in valve body 41 and the overflow valve body 42, so that the upper and lower ends of the elastic structure 6 can be respectively pressed against the overflow valve body 42 and the built-in valve body 41. Thus, when the overflow valve body 42 moves downward to press against the overflow valve seat structure 43, the elastic structure 6 is squeezed. At this time, the elastic structure 6 can apply an elastic force to the overflow valve body 42 in the direction away from the overflow valve seat structure 43 under the action of its own restoring force, and can push the overflow valve body 42 to move upward. As the overflow valve body 42 moves, the first channel 47 is opened, and the oil fluid can flow through the first channel 47. At this time, the flow rate of the oil fluid is large, and the hardness of the shock absorber is relatively soft.

[0067] Thus, by enabling the piston rod 2, the built-in valve body 41, and the piston valve assembly 3 to move relative to the housing 1, the oil fluid pressure in the compression chamber 11 and the restoration chamber 12 can be changed and the oil fluid can be driven to flow. Moreover, the overflow valve body 42 can close the first channel 47 under the action of the driving component 5, so that the oil fluid cannot flow between the compression chamber 11 and the restoration chamber 12 through the first channel 47. At this time, the flow rate of the oil fluid is small and the damping force is large. And, the overflow valve body 42 can open the first channel 47 under the action of the elastic structure, so that the oil fluid can flow between the compression chamber 11 and the restoration chamber 12 through the first channel 47. At this time, the flow rate of the oil fluid is large and the damping force is small.

[0068] According to the damping adjustment module 100 of the embodiment of the present utility model, the driving component 5 and the elastic structure 6 can drive the overflow valve body 42 to move in different directions, so that the first channel 47 can be closed or opened, and further the flow rate of the oil fluid can be changed, and thus the damping force can be changed, and further the hardness of the shock absorber can be adjusted, which can improve the riding comfort of the vehicle and is beneficial to improving the user satisfaction.

[0069] In some embodiments, an installation groove 413 is provided on the inner peripheral wall of the built-in valve body 41, and the elastic structure 6 is configured as an elastic reed installed in the installation groove 413, and the elastic reed presses against the overflow valve body 42 axially to apply an elastic force to the overflow valve body 42.

[0070] Specifically, the elastic structure 6 is configured as an elastic reed. An installation groove 413 is provided on the inner peripheral wall of the built-in valve body 41. The installation groove 413 is used for installing the elastic reed, so that the elastic reed can be partially inserted into the installation groove 413 to realize the installation of the elastic reed. And as Figures 1 - 5 and Figure 24As shown, the elastic reed is configured to be conical. The upper end presses against the overflow valve body 42, and the lower end presses against the built-in valve body 41. When the overflow valve body 42 moves downward, the overflow valve body 42 can squeeze the elastic reed. At this time, the elastic reed can apply an elastic force in the direction away from the overflow valve seat structure 43 to the overflow valve body 42 under the action of its own restoring force. That is, when the overflow valve body 42 moves downward under the action of the driving assembly 5, the elastic reed can be squeezed. At this time, the elastic reed can provide an upward elastic force to the overflow valve body 42, that is, provide a force acting in the direction away from the overflow valve seat structure 43 to the overflow valve body 42.

[0071] In some embodiments, the overflow valve seat structure 43 includes an overflow valve seat 431 and an overflow valve piece 432. The overflow valve seat 431 is connected to the built-in valve body 41. The overflow valve seat 431 is formed with a first communication hole 4311 communicating with the compression chamber 11. The overflow valve piece 432 is provided with a second communication hole 4321 communicating with the first communication hole 4311. The first communication hole 4311 and the second communication hole 4321 together constitute a first channel 47. The overflow valve body 42 moves relative to the overflow valve piece 432 to selectively communicate the second communication hole 4321 with the restoration chamber 12.

[0072] Specifically, the overflow valve seat structure 43 includes an overflow valve seat 431 and an overflow valve piece 432, and the overflow valve piece 432 is arranged above the overflow valve seat 431, that is, between the overflow valve body 42 and the overflow valve seat 431. When the overflow valve body 42 moves downward under the action of the driving assembly 5, it can push the overflow valve piece 432 towards the overflow valve seat 431. At the same time, the overflow valve seat 431 is connected to the built-in valve body 41. As Figures 1 - 5 shown, the inner peripheral wall of the lower valve body 412 is formed with an internal thread, and the outer peripheral wall of the overflow valve seat 431 is formed with an external thread. The connection between the lower valve body 412 and the overflow valve seat 431 can be realized by means of thread fitting, that is, the connection between the built-in valve body 41 and the overflow valve seat 431 is realized, so that the built-in valve body 41 can drive the overflow valve seat 431 to move under the action of the piston rod 2.

[0073] Meanwhile, the first communication hole 4311 is communicated with the compression chamber 11, enabling hydraulic oil to flow between the compression chamber 11 and the first communication hole 4311. The second communication hole 4321 is communicated with the first communication hole 4311, enabling hydraulic oil to flow along the first communication hole 4311 and the second communication hole 4321. Moreover, the first communication hole 4311 and the second communication hole 4321 together form the first passage 47, that is, when the first communication hole 4311 is communicated with the second communication hole 4321, hydraulic oil can flow along the first passage 47. In addition, the overflow valve body 42 can move under the action of the driving assembly 5 and the elastic structure 6. When the overflow valve body 42 moves under the action of the driving assembly 5, the second communication hole 4321 can be disconnected from the restoration chamber 12. At this time, hydraulic oil cannot flow between the compression chamber 11 and the restoration chamber 12 through the first passage 47, resulting in a smaller flow rate of the hydraulic oil and a larger damping force. When the overflow valve body 42 moves under the action of the elastic structure 6, the second communication hole 4321 can be communicated with the restoration chamber 12. At this time, hydraulic oil can flow between the compression chamber 11 and the restoration chamber 12 through the first passage 47, resulting in a larger flow rate of the hydraulic oil and a smaller damping force. Thus, the flow rate of the hydraulic oil can be adjusted by changing the connection and disconnection between the second communication hole 4321 and the restoration chamber 12, that is, the magnitude of the damping force can be adjusted.

[0074] In some embodiments, the overflow valve seat 431 is provided with an overflow groove 4312 communicated between the first communication hole 4311 and the restoration chamber 12, and the flow area of the overflow groove 4312 is smaller than that of the second communication hole 4321.

[0075] Specifically, the first communication hole 4311 is formed on the overflow valve seat 431, and the first communication hole 4311 is communicated with the compression chamber 11. Meanwhile, an overflow groove 4312 is also provided on the overflow valve seat 431 and communicated between the first communication hole 4311 and the restoration chamber 12. In this way, the compression chamber 11 and the restoration chamber 12 can be communicated through the first communication hole 4311 and the overflow groove 4312, enabling hydraulic oil to flow between the compression chamber 11 and the restoration chamber 12 along the first communication hole 4311 and the overflow groove 4312. Thus, not only can the compression chamber 11 and the restoration chamber 12 be communicated through the first communication hole 4311 and the second communication hole 4321, but also through the first communication hole 4311 and the overflow groove 4312.

[0076] In addition, by making the flow area of the overflow groove 4312 smaller than that of the second communication hole 4321, the opening area of the overflow groove 4312 can be made smaller than that of the second communication hole 4321, so that the flow rate of the oil flowing between the compression chamber 11 and the restoration chamber 12 through the first communication hole 4311 and the overflow groove 4312 is smaller than the flow rate of the oil flowing between the compression chamber 11 and the restoration chamber 12 through the first communication hole 4311 and the second communication hole 4321. Thus, the flow rate of the oil can be controlled by selecting the communication path between the compression chamber 11 and the restoration chamber 12 to change the magnitude of the damping force, that is, to adjust the hardness of the shock absorber.

[0077] In some embodiments, at least a part of the restoration chamber 12 surrounds the overflow valve seat 431. There are multiple overflow grooves 4312, and the multiple overflow grooves 4312 are spaced apart along the circumferential direction of the overflow valve seat 431 and are respectively communicated between the first communication hole 4311 and the restoration chamber 12.

[0078] Specifically, an overflow groove 4312 is provided on the overflow valve seat 431. The overflow groove 4312 is used to communicate the first communication hole 4311 and the restoration chamber 12. The restoration chamber 12 can be partially or entirely surrounded by the overflow valve seat 431, so as to facilitate the communication between the first communication hole 4311 and the restoration chamber 12 through the overflow groove 4312 on the overflow valve seat 431, so that the oil can flow between the compression chamber 11 and the restoration chamber 12 through the first communication hole 4311 and the overflow groove 4312. Multiple overflow grooves 4312 can be provided on the overflow valve seat 431, that is, the number of the overflow grooves 4312 can be two, three or more, so as to communicate the first communication hole 4311 and the restoration chamber 12 through multiple overflow grooves 4312 at the same time, so that the oil can flow through multiple overflow grooves 4312 at the same time, increasing the flow rate of the oil flowing between the compression chamber 11 and the restoration chamber 12 and reducing the damping force.

[0079] In addition, by spacing the multiple overflow grooves 4312 apart along the circumferential direction of the overflow valve seat 431, the multiple overflow grooves 4312 can be evenly distributed along the circumferential direction of the overflow valve seat 431, and by respectively communicating the multiple overflow grooves 4312 between the first communication hole 4311 and the restoration chamber 12, the first communication hole 4311 and the restoration chamber 12 can be communicated through the multiple overflow grooves 4312 at the same time, so that the oil can flow between the compression chamber 11 and the restoration chamber 12 through the first communication hole 4311 and the multiple overflow grooves 4312 at the same time, increasing the flow rate of the oil, reducing the damping force, and avoiding interference between the multiple overflow grooves 4312, resulting in a decrease in the flow rate of the oil.

[0080] In the embodiment as Figure 19 shown, three overflow grooves 4312 are provided on the overflow valve seat 431, so that the oil can flow through the three overflow grooves 4312 at the same time to increase the flow rate of the oil.

[0081] In some embodiments, a first gap 45 is formed between the overflow valve seat 431 and the overflow valve piece 432. At least a part of the restoration cavity 12 is distributed around the first gap 45. The driving assembly 5 is adapted to push the overflow valve body 42 to press against the overflow valve piece 432 and close the first gap 45. The pressure in the restoration cavity 12 is adapted to push the overflow valve body 42 to overcome the driving force of the driving assembly 5 to open the first gap 45 and communicate between the first communication hole 4311 and the restoration cavity 12.

[0082] Specifically, as Figures 20 - 23 shown, a first gap 45 is formed between the overflow valve seat 431 and the overflow valve piece 432. When the first gap 45 is open, the first communication hole 4311 can be communicated with the restoration cavity 12 through the first gap 45. When the first gap 45 is closed, the first communication hole 4311 and the restoration cavity 12 cannot be communicated through the first gap 45. The restoration cavity 12 can be partially or entirely distributed around the first gap 45 to facilitate the communication between the first communication hole 4311 and the restoration cavity 12 through the first gap 45, so that the hydraulic fluid can flow between the compression cavity 11 and the restoration cavity 12 through the first communication hole 4311 and the first gap 45.

[0083] Meanwhile, when the driving assembly 5 is powered on, the driving assembly 5 can provide a driving force to the overflow valve body 42 to push the overflow valve body 42 to move towards the overflow valve piece 432 and press against the overflow valve piece 432 to close the first gap 45. At this time, the hydraulic fluid cannot flow through the first gap 45. When the pressure in the restoration cavity 12 is greater than the driving force of the driving assembly 5, the pressure in the restoration cavity 12 can push the overflow valve body 42 to move away from the overflow valve piece 432, so that the overflow valve body 42 is separated from the overflow valve piece 432 and the first gap 45 is opened. At this time, the first communication hole 4311 is communicated with the restoration cavity 12, and the hydraulic fluid can flow between the compression cavity 11 and the restoration cavity 12 through the first gap 45 and the first communication hole 4311, and at this time, the flow rate of the hydraulic fluid is large and the damping force is small.

[0084] In some embodiments, the damping adjustment module 100 further includes a pilot valve plug 7. The driving assembly 5 is adapted to drive the pilot valve plug 7 to push the overflow valve body 42 to press against the overflow valve piece 432. Wherein, a middle overflow space 46 is formed between the overflow valve body 42 and the built-in valve body 41. The middle overflow space 46 is communicated between the second communication hole 4321 and the restoration cavity 12. The pilot valve plug 7 is adapted to close the middle overflow space 46 under the action of the driving assembly 5 and conduct the middle overflow space 46 under the action of the pressure in the restoration cavity 12.

[0085] Specifically, the pilot valve plug 7 can move relative to the housing 1. When the drive assembly 5 is energized, the drive assembly 5 can drive the pilot valve plug 7 to move downward. The pilot valve plug 7 can push the overflow valve body 42 downward, that is, move in the direction close to the overflow valve piece 432 to press the overflow valve piece 432, and the pilot valve plug 7 can be arranged above the overflow valve body 42 to facilitate the pilot valve plug 7 to push the overflow valve body 42 downward. At this time, the overflow valve piece 432 will press the overflow valve seat 431 to close the first gap 45. At the same time, a middle overflow space 46 is formed between the overflow valve body 42 and the built-in valve body 41. The middle overflow space 46 is communicated between the second communication hole 4321 and the restoration cavity 12. That is, the second communication hole 4321 and the restoration cavity 12 can be communicated through the middle overflow space 46, so that the oil fluid can flow between the second communication hole 4321 and the restoration cavity 12 through the middle overflow space 46, that is, flow between the compression cavity 11 and the restoration cavity 12.

[0086] Moreover, when the drive assembly 5 is energized, the drive assembly 5 can provide a driving force to the pilot valve plug 7 to make the pilot valve plug 7 move downward to close the middle overflow space 46. At this time, the oil fluid cannot flow through the middle overflow space 46. When the pressure in the restoration cavity 12 is greater than the driving force of the drive assembly 5, the pressure in the restoration cavity 12 can push the pilot valve plug 7 upward to open the middle overflow space 46. At this time, the second communication hole 4321 is communicated with the restoration cavity 12, and the oil fluid can flow between the compression cavity 11 and the restoration cavity 12 through the first communication hole 4311, the second communication hole 4321 and the middle overflow space 46.

[0087] In some embodiments, the middle overflow space 46 includes a throttle hole 461, a middle hole 462 and an axial through hole 463. The throttle hole 461 is arranged on the built-in valve body 41 and communicated with the restoration cavity 12. The axial through hole 463 is arranged on the overflow valve body 42 and communicated with the second communication hole 4321. The middle hole 462 is arranged on the overflow valve body 42 and opens axially along the overflow valve body 42 towards the pilot valve plug 7. The middle hole 462 is used to communicate the throttle hole 461 with the axial through hole 463. The pilot valve plug 7 is adapted to close or open the middle hole 462.

[0088] Specifically, a throttle hole 461 can be formed in the built-in valve body 41, and the throttle hole 461 is communicated with the restoring cavity 12, so that hydraulic oil can flow between the throttle hole 461 and the restoring cavity 12. An axial through hole 463 can be formed in the overflow valve body 42. The axial through hole 463 extends along the axial direction of the overflow valve body 42, and the axial through hole 463 is communicated with the second communication hole 4321, so that hydraulic oil can flow between the axial through hole 463 and the second communication hole 4321. At the same time, a middle hole 462 can be formed in the overflow valve body 42, and the middle hole 462 faces the pilot valve plug 7 along the axial direction of the overflow valve body 42. That is, the middle hole 462 can extend axially and open upward. The bottom of the pilot valve plug 7 can be configured as an inclined surface or an arc surface structure, so that the pilot valve plug 7 can abut against the overflow valve body 42 at the middle hole 462, facilitating the pilot valve plug 7 to push the overflow valve body 42 to move under the action of the driving assembly 5 to press the overflow valve piece 432.

[0089] In addition, the middle hole 462 can be used to communicate the throttle hole 461 with the axial through hole 463, so that hydraulic oil can flow between the throttle hole 461 and the axial through hole 463 through the middle hole 462. And the pilot valve plug 7 can be used to block or conduct the middle hole 462. That is, when the pilot valve plug 7 moves downward under the action of the driving assembly 5, it can cooperate with the middle hole 462 and block the middle hole 462. At this time, hydraulic oil cannot flow between the throttle hole 461 and the axial through hole 463 through the middle hole 462. When the pressure in the restoring cavity 12 is greater than the driving force of the driving assembly 5, the pressure in the restoring cavity 12 can push the pilot valve plug 7 to move upward, that is, move away from the middle hole 462 to conduct the middle hole 462, and hydraulic oil can flow between the throttle hole 461 and the axial through hole 463 through the middle hole 462.

[0090] In some embodiments, the middle overflow space 46 further includes a communication cavity 464. The communication cavity 464 is located between the overflow valve body 42 and the built-in valve body 41. The inner end of the throttle hole 461 is communicated with the communication cavity 464. The overflow valve body 42 is further provided with a radial through hole 421 for communicating the communication cavity 464 with the middle hole 462.

[0091] Specifically, the communication cavity 464 is located between the overflow valve body 42 and the built-in valve body 41. That is, the communication cavity 464 can be defined jointly by the overflow valve body 42 and the built-in valve body 41. By communicating the inner end of the throttle hole 461 with the communication cavity 464, the communication cavity 464 can be communicated with the restoring cavity 12 through the throttle hole 461, enabling hydraulic oil to flow between the communication cavity 464 and the restoring cavity 12. At the same time, as Figures 10 - 12 shown, a radial through hole 421 is further provided on the overflow valve body 42. The radial through hole 421 is used to communicate the communication cavity 464 with the middle hole 462, enabling hydraulic oil to flow between the communication cavity 464 and the middle hole 462 through the radial through hole 421.

[0092] Further, when the driving assembly 5 is powered on and the pilot valve plug 7 closes the middle hole 462, when the pressure in the restoring cavity 12 is greater than the driving force of the driving assembly 5, the hydraulic oil in the restoring cavity 12 can flow from the throttle hole 461, the communication cavity 464, and the radial through hole 421 to the middle hole 462, pushing the pilot valve plug 7 upward to make the middle hole 462 conductive.

[0093] In some embodiments, the damping adjustment module 100 further includes a first elastic member 61 and a second elastic member 62. The driving assembly 5 includes an electromagnetic coil 51 and a magnetic core 52. The magnetic core 52 is connected to the pilot valve plug 7, and the electromagnetic coil 51 is adapted to drive the magnetic core 52 to drive the pilot valve plug 7 toward the overflow valve body 42 when powered on.

[0094] Specifically, as Figures 1 - 5 and Figure 9 shown, the driving assembly 5 can drive the pilot valve plug 7 downward. The driving assembly 5 includes an electromagnetic coil 51 and a magnetic core 52. The electromagnetic coil 51 can generate an electromagnetic force when the driving assembly 5 is powered on, and then can drive the magnetic core 52 downward, that is, toward the direction close to the overflow valve body 42, so that the pilot valve plug 7 can move downward under the drive of the magnetic core 52 to close the middle hole 462, that is, the electromagnetic coil 51 can drive the magnetic core 52 to drive the pilot valve plug 7 toward the overflow valve body 42 when powered on. Among them, there is a clearance fit between the magnetic core 52 and the upper valve body 411, and the magnetic core 52 can perform axial movement along the upper valve body 411.

[0095] Among them, the first elastic member 61 is used to apply an elastic force to the magnetic core 52 away from the overflow valve seat 431, and the second elastic member 62 is used to apply an elastic force to the magnetic core 52 close to the overflow valve seat 431. When the electromagnetic coil 51 is not powered on, the magnetic core 52 is adapted to be in the middle position in the movement direction under the action of the first elastic member 61 and the second elastic member 62.

[0096] Specifically, the first elastic member 61 is used to apply an elastic force to the magnetic core 52 away from the overflow valve seat 431, and the second elastic member 62 is used to apply an elastic force to the magnetic core 52 close to the overflow valve seat 431. The first elastic member 61 and the second elastic member 62 can be respectively arranged at both ends of the magnetic core 52. Installation parts can be respectively arranged at the upper and lower ends of the magnetic core 52 to install the first elastic member 61 and the second elastic member 62 respectively. When the electromagnetic coil 51 is not powered on, the magnetic core 52 can be in the middle position in the movement direction under the combined action of the first elastic member 61 and the second elastic member 62, that is, there is enough movement space in both the up and down directions of the magnetic core 52 to facilitate the upward or downward movement of the magnetic core 52. Among them, both the first elastic member 61 and the second elastic member 62 can be springs.

[0097] And, it should be noted that, as Figures 1 - 5As shown, a coil bracket 53 and a coil metal cap 54 are further provided in the driving assembly 5. The coil bracket 53 is used to fix the copper wire to install the electromagnetic coil 51. The coil metal cap 54 is configured in a C shape and is used to enhance the concentration of the magnetic field from above the electromagnetic coil 51. At the same time, a magnetic isolation ring 55 is provided between the electromagnetic coil 51 and the built-in valve body 41. The magnetic isolation ring 55 is used to enhance the concentration of the magnetic field from below the electromagnetic coil 51, so that the magnetic field can be concentrated on the magnetic core 52, improving the efficiency of the electromagnetic coil 51. A middle hole is provided in the middle of the magnetic isolation ring 55, and the middle hole is configured as a through hole through which the magnetic core 52 can pass.

[0098] At the same time, an iron core cover 56 is further provided in the inner cavity of the electromagnetic coil 51. As Figures 7 - 8 shown, the iron core cover 56 is of a hollow structure and is arranged circumferentially around the magnetic core 52 for guiding the movement of the magnetic core 52. The coil metal cap 54 abuts against the top surface of the iron core cover 56. When the electromagnetic coil 51 is energized, the magnetic lines of force will be conducted through the coil metal cap 54, the iron core cover 56 and the built-in valve body 41 to form a strong magnetic force, driving the magnetic core 52 to attract the built-in valve body 41. A circular boss is provided at the top of the iron core cover 56, and the circular boss is used to position the coil metal cap 54 and the coil bracket 53 to improve the accuracy of the installation positions of the coil metal cap 54 and the coil bracket 53. The inner side wall of the iron core cover 56 is fitted with the magnetic core 52, and the outer side wall is fitted with the coil bracket 53. Among them, the inner side of the iron core cover 56 and the magnetic core 52 are in clearance fit, and the outer side and the magnetic isolation ring 55 are in interference fit to prevent liquid leakage. The magnetic isolation ring 55, the iron core cover 56 and the magnetic core 52 are mutually abutted and fixed in the piston rod 2, and the built-in valve body 41 can be made of a magnetic material.

[0099] In some embodiments, both the first communication holes 4311 and the second communication holes 4321 are multiple. The multiple first communication holes 4311 are spaced apart circumferentially on the overflow valve seat 431, and the multiple second communication holes 4321 are spaced apart circumferentially on the overflow valve disc 432. Among them, the multiple first communication holes 4311 and the multiple second communication holes 4321 are arranged axially opposite to each other along the overflow valve seat 431.

[0100] Specifically, as Figures 18 - 19As shown, a first connecting hole 4311 is provided on the overflow valve seat 431, and a second connecting hole 4321 is provided on the overflow valve plate 432, and the first connecting hole 4311 is connected to the second connecting hole 4321, and the compression chamber 11 and the recovery chamber 12 can be connected through the first connecting hole 4311 and the second connecting hole 4321, and the first connecting hole 4311 and the second connecting hole 4321 can be set to multiple, that is, the number of the first connecting hole 4311 and the second connecting hole 4321 can be two respectively. , three or more, so as to connect the compression chamber 11 and the recovery chamber 12 through multiple first connecting holes 4311 and multiple second connecting holes 4321 to increase the flow rate of oil, and the multiple first connecting holes 4311 are spaced apart and distributed in the circumferential direction of the overflow valve seat 431, and the multiple second connecting holes 4321 are spaced apart and distributed in the circumferential direction of the overflow valve plate 432, which can prevent the multiple first connecting holes 4311 from interfering with each other, or the multiple second connecting holes 4321 from interfering with each other, resulting in a reduction in the flow rate of oil.

[0101] Furthermore, a plurality of first connecting holes 4311 and a plurality of second connecting holes 4321 are arranged one by one in correspondence with each other along the axial direction of the overflow valve seat 431, that is, for each first connecting hole 4311, a second connecting hole 4321 is arranged corresponding thereto, so as to improve the reliability of the oil flowing between the compression chamber 11 and the recovery chamber 12 through the first connecting hole 4311 and the second connecting hole 4321.

[0102] In some embodiments, the damping adjustment module 100 also includes a guide limiting structure 8, which includes a guide bolt 81 and a limiting nut 82. The guide bolt 81 includes a rod body 811 and a bolt head 812. The bolt head 812 is connected to one end of the rod body 811, and the rod body 811 is sequentially inserted into the overflow valve plate 432 and the overflow valve seat 431; wherein the bolt head 812 is limited and pressed against the end of the overflow valve plate 432 away from the overflow valve seat 431, the limiting nut 82 is connected to the other end of the rod body 811 and is located at the end of the overflow valve seat 431 away from the overflow valve plate 432, and an elastic return member 83 is also provided between the limiting nut 82 and the overflow valve seat 431.

[0103] Specifically, the guide limiting structure 8 is used to limit the movement of the overflow valve plate 432, so that the guide limiting structure 8 includes a guide bolt 81 and a limiting nut 82, such as Figures 1 - 5 , Figure 17 and Figures 20 - 23As shown in the figure, the rod body 811 is sequentially passed through the overflow valve plate 432 and the overflow valve seat 431, so that the overflow valve plate 432 and the overflow valve seat 431 can be both passed through the guide bolt 81, facilitating the alignment of the first communication hole 4311 and the second communication hole 4321, and the bolt head 812 is limited and pressed against one end of the overflow valve plate 432 away from the overflow valve seat 431, that is, pressed against the upper end surface of the overflow valve plate 432, to prevent the overflow valve plate 432 from disengaging from the guide and limit structure 8 when moving upward. At the same time, the limit nut 82 is connected to the other end of the rod body 811, so that the limit nut 82 and the bolt head 812 are respectively connected to both ends of the rod body 811, to avoid interference between the two, resulting in the inability to limit the overflow valve plate 432, and the limit nut 82 is arranged at one end of the overflow valve seat 431 away from the overflow valve plate 432, that is, the limit nut 82 is arranged at the lower end of the overflow valve seat 431, to prevent the overflow valve body 42 from pushing the overflow valve plate 432 and the overflow valve seat 431 out of the guide and limit structure 8 when moving downward. In addition, an elastic return member 83 is arranged between the limit nut 82 and the overflow valve seat 431, and the elastic return member 83 is used to provide an upward elastic force to the overflow valve seat 431, so that the overflow valve plate 432 abuts against the overflow valve seat 431.

[0104] In addition, it should be noted that, as Figures 1 - 5 shown in the figure, the housing 1 includes an inner housing 13 and an outer housing 14, so that the components in the damping adjustment module 100 can be installed and protected by the inner housing 13 and the outer housing 14 together, and a liquid storage cavity 15 is formed between the inner housing 13 and the outer housing 14. There is oil and inert gas with a certain pressure stored in the liquid storage cavity 15. The oil in the liquid storage cavity 15 can flow into the compression cavity 11 simultaneously with the oil in the restoration cavity 12, or the oil in the compression cavity 11 can flow into the liquid storage cavity 15 and the restoration cavity 12 simultaneously. Among them, the inert gas can be nitrogen, to provide a stable pressure environment for the oil in the liquid storage cavity 15, and improve the performance consistency of the damping adjustment module 100 under various working conditions. The inner housing 13 and the outer housing 14 can be steel housings.

[0105] At the same time, a bottom valve assembly 9 is arranged at the bottom of the inner housing 13. The bottom valve assembly 9 can be used to control the flow of oil between the liquid storage cavity 15 and the compression cavity 11. Usually, the bottom valve assembly 9 is in an open state all the time, that is, the compression cavity 11 and the liquid storage cavity 15 are always kept in communication. And a plurality of ventilation channels are arranged axially along the side wall of the magnetic core 52, and a plurality of ventilation side holes are arranged radially along the side wall of the magnetic core 52, and the ventilation channels are communicated with the ventilation side holes, for ventilation when the magnetic core 52 moves up and down.

[0106] And, a sealing ring 21 and a guide sleeve are further arranged in the inner cavity of the piston rod 2. Among them, the sealing ring 21 is arranged between the magnetic isolation ring 55 and the inner housing 13 and can play a sealing role. The guide sleeve includes an upper guide sleeve 221 and a lower guide sleeve 222. As Figures 1 - 5 and Figure 16 shown, the upper guide sleeve 221 is arranged around the top of the pilot valve plug 7, and the lower guide sleeve 222 is arranged between the built-in valve body 41 and the pilot valve plug 7. Both the upper guide sleeve 221 and the lower guide sleeve 222 are in moving fit with the pilot valve plug 7 to guide the movement of the pilot valve plug 7. And there is a clearance fit between the pilot valve plug 7 and both the upper guide sleeve 221 and the lower guide sleeve 222 to reduce wear. Moreover, at least one groove structure is arranged on the outer side walls of both the upper guide sleeve 221 and the lower guide sleeve 222 for the flow of oil or gas.

[0107] In addition, it should be noted that the working conditions of the damping adjustment module 100 in this application are specifically as follows:

[0108] When the vehicle is driving on a relatively flat road surface, the electromagnetic coil 51 is not energized, and the overflow valve body 42 and the overflow valve plate 432 are separated under the action of the elastic structure 6, which is equivalent to the built-in valve assembly 4 being a normally open valve. The oil can flow between the compression chamber 11 and the recovery chamber 12 through the gap between the overflow valve body 42 and the overflow valve plate 432. As Figures 2 - 3 shown, when the piston rod 2 moves upward, the pressure in the recovery chamber 12 increases, and the oil flows from the recovery chamber 12 through the gap between the overflow valve plate 432 and the overflow valve body 42 into the compression chamber 11. At the same time, the oil in the liquid storage chamber 15 flows into the compression chamber 11 through the bottom valve assembly 9. In this state, the flow rate of the oil is large, and the damping of the oil flow is small, and the shock absorber shows "softness"; when the piston rod 2 moves downward, the pressure in the recovery chamber 12 decreases, and the pressure in the compression chamber 11 increases. The oil flows out from the compression chamber 11 and pushes the overflow valve plate 432 to abut against the lower end surface of the overflow valve body 42. At this time, the oil flows from the first gap 45 between the overflow valve plate 432 and the overflow valve seat 431 into the recovery chamber 12. At the same time, the oil in the compression chamber 11 flows into the liquid storage chamber 15 through the bottom valve assembly 9, and the gas in the liquid storage chamber 15 is compressed to absorb energy and reduce vibration. In this state, the oil flow rate is large, and the damping of the oil flow is small. That is, when the piston rod 2 reciprocates up and down, the oil reciprocates between the liquid storage chamber 15, the compression chamber 11, and the recovery chamber 12 with a large flow rate and a small flow damping, and the riding comfort is good.

[0109] When the vehicle is traveling on an uneven road surface, the electromagnetic coil 51 is energized, and the magnetic core 52 moves downward under the action of electromagnetic force. The pilot valve plug 7 drives the overflow valve body 42 to press against the overflow valve plate 432 under the drive of the magnetic core 52, and the overflow valve plate 432 abuts against the overflow valve seat 431. In this way, the gap between the overflow valve plate 432, the overflow valve body 42 and the overflow valve seat 431 can be closed (or partially closed), as Figures 4 - 5 shown. When the piston rod 2 moves upward, the pressure in the restoration chamber 12 increases, and the hydraulic fluid flows from the restoration chamber 12 and the liquid storage chamber 15 into the compression chamber 11. In the Q1 stage, the overflow valve body 42 abuts against the overflow valve plate 432, and the overflow valve plate 432 abuts against the overflow valve seat 431. The hydraulic fluid first flows out from the overflow groove 4312 of the overflow valve seat 431, with a small flow rate and a large damping, showing as "hard"; in the Q2 stage, the hydraulic fluid enters the communication chamber 464 from the restoration chamber 12 through the throttle hole 461 and flows to the middle hole 462. When the pressure in the communication chamber 464 increases, it overcomes the electromagnetic force to push open the pilot valve plug 7 and flows out to the inner cavity of the overflow valve seat 431, with an increasing flow rate and a decreasing damping; in the Q3 stage, the hydraulic fluid accumulates in large quantities at the lower end of the overflow valve plate 432, and the pressure in the inner cavity of the overflow valve seat 431 continues to increase. When the pressure is greater than the electromagnetic force, the hydraulic fluid pushes open the overflow valve plate 432 and the overflow valve body 42, and flows out from the first gap 45 between the overflow valve seat 431 and the overflow valve plate 432, with a further decrease in damping;

[0110] When the piston rod 2 vibrates downward, the pressure in the compression chamber 11 increases, and the hydraulic fluid flows from the compression chamber 11 into the restoration chamber 12 and the liquid storage chamber 15. In the Q1 stage, the overflow valve body 42 abuts against the overflow valve plate 432, and the overflow valve plate 432 abuts against the overflow valve seat 431. The hydraulic fluid first flows out from the overflow groove 4312 of the overflow valve seat 431, with a small flow rate and a large damping, showing as "hard"; in the Q2 stage, the hydraulic fluid accumulates in large quantities in the inner cavity of the overflow valve seat 431, and the pressure in the inner cavity of the overflow valve seat 431 increases. When the pressure is greater than the electromagnetic force, it pushes open the overflow valve plate 432 and the overflow valve body 42, and flows out from the first gap 45 between the overflow valve seat 431 and the overflow valve plate 432, with a further decrease in damping. That is, when the piston rod 2 reciprocates up and down, the hydraulic fluid reciprocates between the liquid storage chamber 15, the compression chamber 11, and the restoration chamber 12, and the flow rate changes, and the damping of the hydraulic fluid flow changes, resulting in better riding comfort.

[0111] The present utility model also proposes a vehicle.

[0112] The vehicle according to the embodiment of the present utility model is provided with the damping adjustment module 100 as described in any one of the above. Through the driving assembly 5 and the elastic structure 6, the overflow valve body 42 can be driven to move in different directions, so as to close or open the first channel 47, and then the flow rate of the hydraulic fluid can be changed, that is, the damping force can be changed, and then the hardness of the shock absorber can be adjusted, which can improve the riding comfort of the vehicle and is beneficial to improving user satisfaction.

[0113] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0114] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A damping adjustment module, characterized in that: include: Housing (1); A piston valve assembly (3), a built-in valve assembly (4) and a piston rod (2), wherein the piston valve assembly (3) is installed in the housing (1) and divides the inner cavity of the housing (1) into a compression cavity (11) and a recovery cavity (12), the built-in valve assembly (4) comprises a built-in valve body (41), a relief valve body (42) and a relief valve seat structure (43), the built-in valve body (41) is located in the recovery cavity (12) and connected between the piston valve assembly (3) and the piston rod (2), the relief valve body (42) and the relief valve seat structure (43) are both installed on the built-in valve body (41), the built-in valve body (41) and the relief valve seat structure (43) form a first channel (47) communicating between the compression cavity (11) and the recovery cavity (12), and the relief valve body (42) is movable relative to the built-in valve body (41) to adjust the flow damping of the first channel (47); A driving assembly (5), the driving assembly (5) being used to drive the overflow valve body (42) to move in a direction close to the overflow valve seat structure (43); An elastic structure (6), wherein the elastic structure (6) is pressed between the built-in valve body (41) and the overflow valve body (42), and the elastic structure (6) is used to apply an elastic force to the overflow valve body (42) to move in a direction away from the overflow valve seat structure (43).

2. The damping adjustment module according to claim 1, characterized in that: The inner peripheral wall of the built-in valve body (41) is provided with a mounting groove (413), and the elastic structure (6) is constructed as an elastic spring installed in the mounting groove (413), and the elastic spring is pressed against the overflow valve body (42) in the axial direction to apply an elastic force to the overflow valve body (42).

3. The damping adjustment module according to claim 1 or 2, characterized in that: The overflow valve seat structure (43) comprises an overflow valve seat (431) and an overflow valve plate (432); the overflow valve seat (431) is connected to the built-in valve body (41); the overflow valve seat (431) is formed with a first connecting hole (4311) communicating with the compression chamber (11); the overflow valve plate (432) is provided with a second connecting hole (4321) communicating with the first connecting hole (4311); the first connecting hole (4311) and the second connecting hole (4321) are jointly constructed as the first channel (47); the overflow valve body (42) moves relative to the overflow valve plate (432) so that the second connecting hole (4321) is selectively connected with the recovery chamber (12).

4. The damping adjustment module according to claim 3, characterized in that: The overflow valve seat (431) is provided with an overflow groove (4312) connected between the first connecting hole (4311) and the recovery chamber (12), and the flow area of ​​the overflow groove (4312) is smaller than the flow area of ​​the second connecting hole (4321).

5. The damping adjustment module according to claim 4, characterized in that: At least part of the restoration chamber (12) is distributed around the overflow valve seat (431), and there are multiple overflow grooves (4312). The multiple overflow grooves (4312) are spaced apart along the circumference of the overflow valve seat (431) and are respectively connected between the first connecting hole (4311) and the restoration chamber (12).

6. The damping adjustment module according to claim 3, characterized in that: A first gap (45) is formed between the overflow valve seat (431) and the overflow valve plate (432), and at least a portion of the restoration chamber (12) is distributed around the first gap (45). The driving component (5) is suitable for pushing the overflow valve body (42) to press the overflow valve plate (432) and close the first gap (45). The pressure in the restoration chamber (12) is suitable for pushing the overflow valve body (42) to overcome the driving force of the driving component (5) so that the first gap (45) is opened and connected between the first connecting hole (4311) and the restoration chamber (12).

7. The damping adjustment module according to claim 3, characterized in that: It also includes a pilot valve plug (7), and the driving assembly (5) is suitable for driving the pilot valve plug (7) to push the overflow valve body (42) toward the overflow valve plate (432) to be pressed; In which, a central overflow space (46) is formed in the overflow valve body (42) and the built-in valve body (41), and the central overflow space (46) is connected between the second connecting hole (4321) and the restoration chamber (12), and the pilot valve plug (7) is suitable for closing the central overflow space (46) under the action of the driving component (5) and conducting the central overflow space (46) under the action of the pressure in the restoration chamber (12).

8. The damping adjustment module according to claim 7, characterized in that: The middle overflow space (46) includes a throttling hole (461), a middle hole (462) and an axial guide hole (463); the throttling hole (461) is provided in the built-in valve body (41) and is connected to the recovery chamber (12); the axial guide hole (463) is provided in the overflow valve body (42) and is connected to the second connecting hole (4321); the middle hole (462) is provided in the overflow valve body (42) and is open toward the pilot valve plug (7) along the axial direction of the overflow valve body (42); the middle hole (462) is used to connect the throttling hole (461) with the axial guide hole (463); the pilot valve plug (7) is suitable for closing or conducting the middle hole (462).

9. The damping adjustment module according to claim 8, characterized in that: The middle overflow space (46) further comprises a connecting cavity (464), wherein the connecting cavity (464) is located between the overflow valve body (42) and the built-in valve body (41), and the inner end of the throttle hole (461) is connected to the connecting cavity (464). The overflow valve body (42) is further provided with a radial guide hole (421) for connecting the connecting cavity (464) with the middle hole (462).

10. The damping adjustment module according to claim 7, characterized in that: The invention also comprises a first elastic member (61) and a second elastic member (62), wherein the driving assembly (5) comprises an electromagnetic coil (51) and a magnetic core (52), wherein the magnetic core (52) is connected to the pilot valve plug (7), and the electromagnetic coil (51) is adapted to drive the magnetic core (52) to drive the pilot valve plug (7) to move toward the overflow valve body (42) when power is supplied; The first elastic member (61) is used to apply an elastic force to the magnetic core (52) away from the overflow valve seat (431), and the second elastic member (62) is used to apply an elastic force to the magnetic core (52) close to the overflow valve seat (431), and when the electromagnetic coil (51) is not energized, the magnetic core (52) is suitable for being in a middle position in the movement direction under the action of the first elastic member (61) and the second elastic member (62).

11. The damping adjustment module according to claim 3, characterized in that: The first communicating hole (4311) and the second communicating hole (4321) are both multiple, the multiple first communicating holes (4311) are spaced apart and distributed in the circumferential direction of the overflow valve seat (431), and the multiple second communicating holes (4321) are spaced apart and distributed in the circumferential direction of the overflow valve plate (432); Wherein, the plurality of first connecting holes (4311) and the plurality of second connecting holes (4321) are arranged opposite to each other in a one-to-one correspondence along the axial direction of the overflow valve seat (431).

12. The damping adjustment module according to claim 3, characterized in that: The invention also comprises a guide limiting structure (8), wherein the guide limiting structure (8) comprises a guide bolt (81) and a limiting nut (82), wherein the guide bolt (81) comprises a rod body (811) and a bolt head (812), wherein the bolt head (812) is connected to one end of the rod body (811), and the rod body (811) is sequentially inserted into the overflow valve plate (432) and the overflow valve seat (431); The bolt head (812) is limitedly pressed against one end of the overflow valve plate (432) away from the overflow valve seat (431), the limiting nut (82) is connected to the other end of the rod body (811) and is located at the end of the overflow valve seat (431) away from the overflow valve plate (432), and an elastic return member (83) is also provided between the limiting nut (82) and the overflow valve seat (431).

13. A vehicle, characterized in that: A damping adjustment module according to any one of claims 1 to 12 is provided.

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