Valve, shock absorber, chassis and vehicle

Abstract

The utility model discloses a valve, a shock absorber, a chassis and a vehicle, the valve comprises: a valve body, which is provided with an inlet and an outlet; the valve core matching piece is arranged in the valve body; the first valve element is movably arranged in the valve element matching piece; the elastic piece is arranged between the first valve element and the valve element matching piece, and the elastic piece constantly pushes the first valve element in the direction facing the inlet so as to constantly cut off communication between the inlet and the outlet. According to the valve, the first valve element is pushed by the elastic piece to cut off communication between the inlet and the outlet, the structure of the valve is simplified, the production difficulty of the valve is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a valve, a shock absorber, a chassis and a vehicle. Background Art

[0002] The car is equipped with shock absorbers in the wheel area to reduce the bumps of the car during driving. When the car body and the wheel move relative to each other, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to another through different pores, and converts the vibration energy into heat energy of the oil and gas and dissipates it into the atmosphere, so that the shock absorber can work efficiently within a lower temperature range.

[0003] In the related art, the shock absorber contains multiple valves, the valve structure is complex, and the production and processing are difficult. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a valve, which uses an elastic member to push a first valve core to cut off the connection between an inlet and an outlet, thereby simplifying the structure of the valve, reducing the difficulty of valve production, and improving production efficiency.

[0005] The second object of the utility model is to provide a shock absorber using the valve.

[0006] The third object of the present utility model is to provide a chassis using the above-mentioned shock absorber.

[0007] The third object of the present utility model is to provide a vehicle using the valve, the shock absorber, or the chassis.

[0008] According to the first aspect of the present invention, the valve comprises: a valve body, on which an inlet and an outlet are formed; a valve core fitting, which is arranged in the valve body; a first valve core, which is movably arranged in the valve core fitting; an elastic member, which is arranged between the first valve core and the valve core fitting, and the elastic member often pushes the first valve core toward the inlet to often cut off the connection between the inlet and the outlet.

[0009] According to the valve of the utility model, the first valve core can be pushed downward by the elastic member to cut off the connection between the inlet and the outlet, and the operation is convenient and simple. In addition, it helps the first valve core to move stably in the valve core fitting, thereby improving the stability of the valve. In addition, the elastic member has a simple structure, thereby simplifying the structure of the valve, reducing the structural difficulty of the valve, facilitating the production, processing and use of the valve, and also reducing the production cost of the valve. When the valve is used in a vehicle, the driving comfort of the vehicle can be improved.

[0010] According to some embodiments of the present utility model, a receiving groove is formed on a surface of the first valve core at one side away from the inlet, and the elastic member abuts between the bottom wall of the receiving groove and the valve core fitting.

[0011] According to some embodiments of the present invention, the outer circumferential surface of the first valve core and the inner circumferential surface of the valve core fitting are slidingly sealed along the moving direction of the first valve core, and the outer circumferential surface of the first valve core is located on the outer circumferential side of the accommodating groove.

[0012] According to some embodiments of the utility model, a guide hole is formed on the valve core fitting, and the guide hole is located on the side of the valve core fitting away from the inlet; a guide portion extending along the moving direction of the first valve core is provided in the accommodating groove, and an end of the guide portion away from the inlet is slidably and sealingly fitted in the guide hole, and the elastic member is sleeved on the outer peripheral side of the guide portion.

[0013] According to some embodiments of the utility model, a throttling hole is formed on the first valve core, and the inlet is connected to the interior of the valve core fitting through the throttling hole; a pressure relief hole is formed on the guide portion, and the interior of the valve core fitting is connected to the outlet through the pressure relief hole.

[0014] According to some embodiments of the present invention, a cross-sectional area of ​​the throttling hole is smaller than a cross-sectional area of ​​the pressure relief hole.

[0015] According to some embodiments of the present utility model, the pressure relief hole includes at least a first pressure relief hole section and a second pressure relief hole section, the first pressure relief hole section extends radially along the guide portion, the first pressure relief hole section passes through the outer circumferential surface of the guide portion and is connected to the interior of the valve core fitting, one end of the second pressure relief hole section passes through an end surface of the guide portion away from the inlet and is connected to the outlet, and the other end of the second pressure relief hole section is connected to the first pressure relief hole section.

[0016] According to some embodiments of the utility model, the valve further includes: a second valve core, which is movably arranged on a side of the valve body away from the inlet, one end of the second valve core is detachably matched with the pressure relief hole to connect and cut off the connection between the throttling hole and the outlet, and the second valve core is suitable for pushing the first valve core toward the inlet to cut off the connection between the inlet and the outlet.

[0017] According to some embodiments of the utility model, the inner wall surface of one end of the pressure relief hole adjacent to the second valve core extends obliquely in a direction away from the inlet and in a direction away from the central axis of the second valve core; the end surface of one end of the second valve core adjacent to the pressure relief hole is formed as a spherical surface.

[0018] According to some embodiments of the present invention, the second valve core is a valve stem.

[0019] According to some embodiments of the present utility model, the valve further comprises: a drive assembly, wherein the drive assembly is disposed on the valve body, and when the drive assembly is working, the drive assembly drives the second valve core to detachably cooperate with the first valve core.

[0020] According to some embodiments of the utility model, the driving assembly includes: a fixed iron core, which is arranged on the valve body; a moving iron core, which is movably arranged on a side of the fixed iron core away from the first valve core along the moving direction of the first valve core, and the second valve core is fixedly connected to the moving iron core.

[0021] According to some embodiments of the present utility model, the valve core fitting is fitted in the fixed iron core, at least one through hole is formed on the fixed iron core, and the pressure relief hole is connected with the outlet through the through hole.

[0022] According to some embodiments of the utility model, at least one flow hole is formed on the fixed iron core; the driving assembly further includes: a core cover, which is arranged on the moving iron core, and the core cover and the moving iron core jointly define a moving iron core cavity, the moving iron core is movably arranged in the moving iron core cavity, and the pressure relief hole is connected to the moving iron core cavity through the flow hole.

[0023] According to some embodiments of the present utility model, the first valve core has a first pressure-bearing surface and a second pressure-bearing surface, the second pressure-bearing surface is located on the side of the first pressure-bearing surface away from the inlet, and the first valve core is configured to separate from a side surface of the valve body where the inlet is located when the pressure applied to the first pressure-bearing surface is greater than the pressure applied to the second pressure-bearing surface so that the inlet and the outlet are connected.

[0024] According to some embodiments of the present invention, the flow area of ​​the outlet is larger than the maximum flow area when the first valve core is separated from a side surface of the valve body where the inlet is located.

[0025] According to some embodiments of the utility model, at least one notch is formed on the side of the valve core fitting facing the inlet, and when the first valve core is separated from a side surface of the valve body where the inlet is located, the inlet is connected to the outlet through the notch.

[0026] According to some embodiments of the present invention, a protrusion extending toward the first valve core is provided at the outer periphery of the inlet, and an end surface of the first valve core adjacent to the inlet is detachably matched with the protrusion.

[0027] The shock absorber according to the embodiment of the second aspect of the utility model comprises the valve according to the embodiment of the first aspect of the utility model.

[0028] The chassis according to the embodiment of the third aspect of the utility model includes the shock absorber according to the embodiment of the second aspect of the utility model.

[0029] The vehicle according to the fourth aspect of the utility model comprises the valve according to the first aspect of the utility model, or the shock absorber according to the second aspect of the utility model, or the chassis according to the third aspect of the utility model.

[0030] 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

[0031] 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:

[0032] Figure 1 is a schematic diagram of a valve according to an embodiment of the utility model;

[0033] Figure 2 is a cross-sectional view of a valve according to an embodiment of the utility model, wherein the valve is in a non-powered state;

[0034] Figure 3 yes Figure 2 The enlarged view of the D part circled in the middle;

[0035] Figure 4 is a schematic diagram of a valve body of a valve according to an embodiment of the utility model;

[0036] Figure 5 is a cross-sectional view of a valve body of a valve according to an embodiment of the utility model;

[0037] Figure 6 is a schematic diagram of a first valve core of a valve according to an embodiment of the utility model;

[0038] Figure 7 is a cross-sectional view of a first valve core of a valve according to an embodiment of the utility model;

[0039] Figure 8 is a schematic diagram of a valve body fitting of a valve according to an embodiment of the utility model;

[0040] Fig. 9 is a cross-sectional view of a valve body fitting of a valve according to an embodiment of the utility model;

[0041] Fig.10It is a schematic diagram of assembling the second valve core and the moving iron core of the valve according to an embodiment of the utility model;

[0042] Fig.11 is an assembly cross-sectional view of a second valve core and a moving iron core of a valve according to an embodiment of the utility model;

[0043] Fig.12 is a schematic diagram of a fixed iron core of a valve according to an embodiment of the utility model;

[0044] Fig.13 is a cross-sectional view of a fixed iron core of a valve according to an embodiment of the utility model;

[0045] Fig.14 is a schematic diagram of fluid flow in a power-on state of a valve according to an embodiment of the utility model;

[0046] Fig.15 Schematic diagram of a shock absorber according to an embodiment of the utility model.

[0047] Reference numerals:

[0048] 100. Valve;

[0049] 1. Valve body; 11. Inlet; 12. Outlet; 121. Oil outlet hole; 13. Protrusion;

[0050] 2. Valve core fittings; 21. Guide hole; 22. Notch;

[0051] 3. first valve core; 31. receiving groove; 32. guide portion;

[0052] 321, pressure relief hole; 3211, first pressure relief hole section; 3212, second pressure relief hole section;

[0053] 33. throttle hole; 34. first pressure-bearing surface; 35. second pressure-bearing surface; 36. groove;

[0054] 4. elastic member; 5. second valve core; 51. valve stem;

[0055] 6. driving assembly; 61. fixed iron core; 611. via hole; 612. flow hole;

[0056] 613, through hole; 614, first sleeve; 62, moving iron core;

[0057] 63. iron core cover; 631. moving iron core cavity; 632. second shaft sleeve;

[0058] 7. Coil assembly; 8. Coil housing; 9. Magnetic isolation ring;

[0059] 200, shock absorber;

[0060] 201. Compression valve; 202. Restoration valve. DETAILED DESCRIPTION

[0061] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 14 The valve 100 according to the first embodiment of the utility model is described. The valve 100 of the present application is described in detail by taking the example of being used in a shock absorber 200 .

[0062] like Figure 1 and Figure 2 As shown, the valve 100 according to the embodiment of the first aspect of the utility model includes a valve body 1, a valve core fitting 2, a first valve core 3 and an elastic member 4.

[0063] Specifically, the valve body 1 is formed with an inlet 11 and an outlet 12, the valve core fitting 2 is disposed in the valve body 1, and the first valve core 3 is movably disposed in the valve core fitting 2. Figure 1 and Figure 2 In the example, the inlet 11 is formed at the lower end of the valve body 1, and the outlet 12 is formed on the side wall of the valve body 1. The first valve core 3 is movable in the valve core fitting 2 along the up-down direction, and the first valve core 3 moves in the up-down direction to separate and connect the inlet 11 and the outlet 12. In this way, a fluid (such as oil) can flow into the valve body 1 from the inlet 11 of the valve body 1, and then flow out of the valve body 1 to the outside of the valve body 1, which is beneficial for the valve 100 to adjust and control the damping force. In addition, when the first valve core 3 moves, the first valve core 3 moves in the valve core fitting 2, which improves the assembly stability of the first valve core 3 and the valve core fitting 2, and also avoids the shaking of the first valve core 3 during the movement, thereby improving the reliability of the first valve core 3, and then improving the stability of the valve 100.

[0064] Combination Figure 2 , the elastic member 4 is disposed between the first valve core 3 and the valve core matching member 2, and the elastic member 4 normally pushes the first valve core 3 toward the inlet 11 to normally block the connection between the inlet 11 and the outlet 12 (that is, the valve 100 can be a normally closed valve). Figure 2 In the example, the upper end of the elastic member 4 abuts against the valve core fitting 2, and the lower end of the elastic member 4 abuts against the first valve core 3. As a result, the valve 100 is easy to use and easy to reset by the elastic member 4 to cut off the connection between the inlet 11 and the outlet 12, thereby helping to increase the operating speed of the valve 100 and shorten the response time of the valve 100. In addition, the elastic member 4 has a simple structure, which simplifies the structure of the valve 100 and reduces the production cost and use cost of the valve 100. For example, the elastic member 4 can be a spring.

[0065] According to the valve 100 of the utility model, the first valve core 3 can be pushed downward by the elastic member 4 to cut off the connection between the inlet 11 and the outlet 12, and the operation is convenient and simple. In addition, it helps the first valve core 3 to move stably in the valve core fitting 2, thereby improving the stability of the valve 100. In addition, the elastic member 4 has a simple structure, thereby simplifying the structure of the valve 100, reducing the structural difficulty of the valve 100, facilitating the production, processing and use of the valve 100, and also reducing the production cost of the valve 100. When the valve 100 is used in a vehicle, the driving comfort of the vehicle can be improved.

[0066] According to some embodiments of the present invention, referring to Figure 2 , Figure 6 and Figure 7 A receiving groove 31 is formed on the surface of the first valve core 3 on one side away from the inlet 11, and the elastic member 4 abuts between the bottom wall of the receiving groove 31 and the valve core matching member 2. Figure 2 , Figure 6 and Figure 7 In the example, the receiving groove 31 is formed in the upper part of the first valve core 3, the lower end of the elastic member 4 abuts against the bottom wall of the receiving groove 31, and the outer peripheral surface of the lower part of the elastic member 4 abuts against the side wall of the receiving groove 31. In this way, the side wall of the receiving groove 31 can limit the lower part of the elastic member 4, so that the elastic member 4 is not easy to deflect during the process of being compressed or restoring the deformation, thereby improving the use stability of the elastic member 4. In addition, the receiving groove 31 has a positioning effect on the elastic member 4, so as to facilitate the rapid assembly of the elastic member 4 and the first valve core 3, and also improve the matching stability of the elastic member 4 with the first valve core 3 and the valve core matching member 2.

[0067] According to some embodiments of the present invention, referring to Figure 2 The outer circumferential surface of the first valve core 3 and the inner circumferential surface of the valve core matching piece 2 are slidably sealed along the moving direction of the first valve core 3 , and the outer circumferential surface of the first valve core 3 is located on the outer circumferential side of the accommodating groove 31 .

[0068] For example, in Figure 2In the example, the cross section of the valve core fitting 2 along the up-down direction is roughly in an inverted "U" shape, and the outer peripheral surface of the first valve core 3 and the inner peripheral surface of the valve core fitting 2 are clearance-matched. Since the clearance is small and smooth, it can be regarded as a sliding seal fluid such as oil. The receiving groove 31 is formed on the inner peripheral side of the outer peripheral surface of the first valve core 3, and the horizontal cross-sectional shape of the receiving groove 31 is circular. Such a configuration improves the sliding sealing performance of the first valve core 3 and the valve core fitting 2, thereby effectively preventing the fluid from flowing between the outer peripheral surface of the first valve core 3 and the inner side wall of the valve core fitting 2, and further facilitating the fluid to flow to the position between the first valve core 3 and the valve core fitting 2, so as to facilitate the normal use of the valve 100. In addition, the inner peripheral surface of the valve core fitting 2 has a guiding effect on the movement of the first valve core 3, thereby improving the reliability of the movement of the first valve core 3, and further improving the reliability of the use of the valve 100.

[0069] According to some embodiments of the present invention, referring to Figure 2 A guide hole 21 is formed on the valve core fitting 2, and the guide hole 21 is located on the side of the valve core fitting 2 away from the inlet 11. A guide portion 32 extending along the moving direction of the first valve core 3 is provided in the accommodating groove 31, and one end of the guide portion 32 away from the inlet 11 is slidably sealed and fitted in the guide hole 21, and the elastic member 4 is sleeved on the outer peripheral side of the guide portion 32.

[0070] For example, in Figure 2In the example, the guide hole 21 is located on the upper side of the valve core fitting 2, and the guide hole 21 penetrates the inner wall of the valve core fitting 2 and the outer wall of the valve core fitting 2 in the up-down direction. The guide portion 32 extends in the up-down direction, the lower end surface of the guide portion 32 is connected to the bottom wall of the accommodating groove 31, the upper end of the guide portion 32 passes through the guide hole 21, and the outer peripheral surface of the upper end of the guide portion 32 is matched with the side wall clearance of the guide hole 21. Since the clearance is small and smooth, it can be regarded as a sliding sealing fluid such as oil. With such a configuration, the inner wall of the guide hole 21 has a guiding effect on the guide portion 32, thereby further avoiding the first valve core 3 from swinging during the up-down movement of the first valve core 3, thereby further improving the stability and reliability of the movement of the first valve core 3. In addition, the coaxiality of the installation of the first valve core 3 and the valve core fitting 2 can also be effectively guaranteed, thereby improving the smoothness of the up-down movement of the first valve core 3 and facilitating the up-down movement of the first valve core 3. Moreover, the sealing performance of the guide portion 32 and the guide hole 21 is improved, and the fluid is prevented from flowing between the outer peripheral surface of the guide portion 32 and the guide hole 21, which helps the valve 100 to be used normally. In addition, the guide portion 32 has a limiting effect on the elastic member 4, so that the elastic member 4 is prevented from shaking during the up and down movement of the first valve core 3, thereby improving the stability of the elastic member 4 in use and the stability of the first valve core 3 in the movement process. Moreover, the guide portion 32 has a guiding and positioning function, which facilitates the guiding assembly of the elastic member 4 and the guide portion 32, thereby facilitating the assembly of the elastic member 4 and the first valve core 3, thereby improving the assembly efficiency of the valve 100 and the reliability of the use of the elastic member 4.

[0071] According to some embodiments of the present invention, referring to Figure 2 and Figure 7 The first valve core 3 is formed with a throttle hole 33, and the inlet 11 is connected with the inside of the valve core fitting 2 through the throttle hole 33. The guide portion 32 is formed with a pressure relief hole 321, and the inside of the valve core fitting 2 is connected with the outlet 12 through the pressure relief hole 321.

[0072] For example, in Figure 2 and Figure 7 In the example, the throttle hole 33 penetrates the lower end surface of the first valve core 3 and the bottom wall of the receiving groove 31 in the up-down direction, and the inlet 11 is connected with the pressure relief hole 321 through the throttle hole 33. When the fluid flows in from the inlet 11, the fluid can flow from the throttle hole 33 to between the first valve core 3 and the valve core fitting 2, and then flow from the pressure relief hole 321 to the outlet 12 and then flow out to the outside of the valve 100. At this time, the flow path of the fluid is the first path (such as Figure 2 As shown by the arrow A in the middle. With such arrangement, the first valve core 3 has a simple structure, a clever design, and is easy to manufacture and process, thereby reducing the production cost. In addition, it is beneficial for the fluid to flow smoothly between the inlet 11 and the outlet 12, thereby facilitating the adjustment of the damping force of the valve 100.

[0073] Further, refer to Figure 2 , the cross-sectional area of ​​the throttling hole 33 is smaller than the cross-sectional area of ​​the pressure relief hole 321. With such a configuration, the flow rate of the fluid flowing into the space between the first valve core 3 and the valve core fitting 2 per unit time is smaller than the flow rate of the fluid flowing out from the space between the first valve core 3 and the valve core fitting 2, and the pressure at the pressure relief hole 321 can be reduced, so that the pressure on the lower side of the first valve core 3 is greater than the pressure on the upper side of the first valve core 3, and the pressure difference between the pressure on the lower side of the first valve core 3 and the pressure on the upper side of the first valve core 3 can push the first valve core 3 to move upward to connect the inlet 11 and the outlet 12, so that the fluid can also flow from the inlet 11 along the lower side of the first valve core 3 and the inner wall of the valve body 1 to the outlet 12, and then flow out from the outlet 12. At this time, the flow path of the fluid is the second path (such as Figure 2 As shown by the arrow B in the middle. Thus, the fluid can flow along the first path and the second path at the same time, increasing the flow rate of the fluid flowing through the valve 100, which is more conducive to the adjustment of the damping force. In addition, the throttle hole 33 can limit the amount of fluid flowing into the first valve core 3 to avoid the accumulation of fluid in the first valve core 3, which is more conducive to the normal use of the valve 100.

[0074] According to some embodiments of the present invention, referring to Figure 2 and Figure 7 The pressure relief hole 321 includes at least one first pressure relief hole section 3211 and a second pressure relief hole section 3212. The first pressure relief hole section 3211 extends along the radial direction of the guide portion 32. The first pressure relief hole section 3211 penetrates the outer circumferential surface of the guide portion 32 and is connected to the interior of the valve core fitting 2. One end of the second pressure relief hole section 3212 penetrates the end surface of the guide portion 32 away from the inlet 11 and is connected to the outlet 12. The other end of the second pressure relief hole section 3212 is connected to the first pressure relief hole section 3211.

[0075] For example, in Figure 2 and Figure 7In the example, the first pressure relief hole section 3211 extends in the horizontal direction, the second pressure relief hole section 3212 extends in the up-down direction, and the upper end of the second pressure relief hole section 3212 penetrates the upper side surface of the guide part 32 and communicates with the outlet 12. One end of the first pressure relief hole section 3211 close to the inner side wall of the valve core fitting 2 penetrates the outer peripheral surface of the guide part 32, and the lower end of the second pressure relief hole section 3212 communicates with the first pressure relief hole section 3211. After the fluid flows in from the inlet 11, it flows to the first valve core 3 and the valve core fitting 2 through the throttle hole 33, and then flows to the outlet 12 along the first pressure relief hole section 3211 and the second pressure relief hole section 3212 in sequence, and then flows out of the valve 100. With such a configuration, the first pressure relief hole section 3211 and the second pressure relief hole section 3212 are simple in structure, thereby reducing the production difficulty of the pressure relief hole 321, increasing the production rate of the pressure relief hole 321, and reducing the production cost of the pressure relief hole 321. Moreover, it is also effectively ensured that the fluid can flow through the pressure relief hole 321, thereby facilitating the normal use of the valve 100.

[0076] According to some embodiments of the present invention, referring to Figure 2 The valve 100 further includes a second valve core 5, which is movably arranged on a side of the valve body 1 away from the inlet 11, and one end of the second valve core 5 is detachably matched with the pressure relief hole 321 to connect and cut off the connection between the throttle hole 33 and the outlet 12, and the second valve core 5 is suitable for pushing the first valve core 3 toward the inlet 11 to cut off the connection between the inlet 11 and the outlet 12.

[0077] For example, in Figure 2 In the example, the second valve core 5 is located at the upper part of the valve body 1, and the throttle hole 33 is connected to the outlet 12 when the lower end of the second valve core 5 is separated from the pressure relief hole 321. When the second valve core 5 moves downward, the lower end of the second valve core 5 cooperates with the pressure relief hole 321 to cut off the connection between the throttle hole 33 and the outlet 12. After the lower end of the second valve core 5 cooperates with the pressure relief hole 321, the second valve core 5 pushes the first valve core 3 to move downward during the downward movement, so that the lower end surface of the first valve core 3 contacts the inner wall of the valve body 1 to cut off the inlet 11 and the outlet 12. In this way, the detachable cooperation between the lower end of the second valve core 5 and the pressure relief hole 321 is conducive to the flow of fluid in the valve body 1, thereby facilitating the normal use of the valve 100. Moreover, the flow at the pressure relief hole 321 can be adjusted by the cooperation between the lower end of the second valve core 5 and the pressure relief hole 321, thereby adjusting the flow at the outlet 12. In addition, the second valve core 5 is easy to operate and can easily cut off the connection between the inlet 11 and the outlet 12 , thereby facilitating the use of the valve 100 .

[0078] According to some embodiments of the present invention, referring to Figure 2 and Figure 3The inner wall surface of one end of the pressure relief hole 321 adjacent to the second valve core 5 extends obliquely in a direction away from the inlet 11 and away from the central axis of the second valve core 5. The end surface of one end of the second valve core 5 adjacent to the pressure relief hole 321 is formed into a spherical surface.

[0079] For example, in Figure 2 and Figure 3 In the example, the side wall of the upper end of the second pressure relief hole section 3212 extends obliquely. Therefore, the cooperation between the lower end of the second valve core 5 and the pressure relief hole 321 can be a spherical-plane cooperation (that is, the lower end of the second valve core 5 and the second pressure relief hole section 3212 are sucked and sealed), that is, the inner wall surface of the second pressure relief hole section 3212 can be set as a plane to cooperate with the end surface of the lower end of the second valve core 5, so that the cooperation between the second valve core 5 and the pressure relief hole 321 is relatively firm. When the end surface of the lower end of the second valve core 5 is matched at the second pressure relief hole section 3212, the second valve core 5 is not easily separated from the second pressure relief hole section 3212 due to the vibration of the valve 100, thereby improving the cooperation reliability of the second valve core 5 and the pressure relief hole 321, thereby improving the reliability of the valve 100, improving the performance of the valve 100, and facilitating the long-term and stable use of the valve 100. But not limited to this. For example, the inner wall surface of the upper end of the second pressure relief hole section 3212 can be formed as an arc surface, and the cooperation between the lower end of the second valve core 5 and the second pressure relief hole section 3212 can be a spherical surface and an arc surface. That is to say, the inner wall surface of the second pressure relief hole section 3212 can be set as an arc surface to cooperate with the end face of the lower end of the second valve core 5.

[0080] According to some embodiments of the present invention, referring to Fig.10 and Fig.11 , the second valve core 5 is a valve stem 51. For example, Fig.10 and Fig.11 In the example, the valve stem 51 extends in the up-down direction, and the shape of the valve stem 51 is substantially cylindrical. Therefore, the second valve core 5 has a simple structure and is easy to produce, thereby increasing the production rate of the second valve core 5 and reducing the production cost of the second valve core 5.

[0081] According to some embodiments of the present invention, referring to Figure 2 The valve 100 further includes a drive assembly 6, which is disposed on the valve body 1. When the drive assembly 6 is working, the drive assembly 6 drives the second valve core 5 to detachably cooperate with the first valve core 3. Figure 2In the example, the drive assembly 6 is located above the valve body 1 and connected to the valve body 1, and the drive assembly 6 can act on the second valve core 5 to drive the second valve core 5 to move up and down. When the drive assembly 6 drives the second valve core 5 to move downward, the lower end of the second valve core 5 cooperates with the inner wall of the upper end of the second pressure relief hole section 3212, and the second valve core 5 cuts off the connection between the pressure relief hole 321 and the outlet 12. When the drive assembly 6 drives the second valve core 5 to move upward, the lower end of the second valve core 5 is separated from the inner wall of the upper end of the second pressure relief hole section 3212, and the pressure relief hole 321 is connected to the outlet 12. Therefore, the drive assembly 6 can act on the second valve core 5 to drive the second valve core 5 to move, thereby adjusting the change in the connection opening of the second valve core 5 to adjust the flow rate of the outlet 12. In addition, through the action of the drive assembly 6, the movement reliability of the second valve core 5 is improved, thereby improving the reliability of the use of the valve 100.

[0082] According to some embodiments of the present invention, referring to Figure 2 The driving assembly 6 includes a fixed iron core 61 and a moving iron core 62. The fixed iron core 61 is arranged on the valve body 1. The moving iron core 62 is movably arranged on a side of the fixed iron core 61 away from the first valve core 3 along the moving direction of the first valve core 3. The second valve core 5 is fixedly connected to the moving iron core 62.

[0083] For example, in Figure 2 In the example, the moving iron core 62 is arranged above the fixed iron core 61, and the moving iron core 62 can move in the up and down direction, and the outer peripheral surface of the second valve core 5 is fixedly connected to the moving iron core 62. After the valve 100 is energized, the moving iron core 62 can drive the second valve core 5 to move downward to adjust the size of the interval between the lower end surface of the second valve core 5 and the inner wall of the upper end of the second pressure relief hole section 3212, that is, to adjust the connection opening of the second valve core 5, thereby adjusting the flow at the pressure relief hole 321, and then adjusting the flow at the outlet 12. Such a configuration makes it easy to adjust the movement of the second valve core 5 through the moving iron core 62, thereby reducing the difficulty of adjusting the flow at the outlet 12, thereby improving the control accuracy, and also improving the reliability of the use of the valve 100. In addition, the fixed iron core 61 has a limiting effect on the moving iron core 62 to limit the moving distance of the moving iron core 62, so as to facilitate the use of the drive component 6.

[0084] According to some embodiments of the present invention, referring to Figure 2 , Fig.12 and Fig.13 The valve core fitting 2 is fitted in the fixed iron core 61, and at least one through hole 611 is formed on the fixed iron core 61, and the pressure relief hole 321 is connected to the outlet 12 through the through hole 611. Figure 2 , Fig.12 and Fig.13In the example, the upper end of the valve core fitting 2 is inserted into the inner side of the lower part of the fixed iron core 61, and the outer side wall of the valve core fitting 2 is snap-fitted with the lower end of the fixed iron core 61. There are four through holes 611, and the four through holes 611 are arranged at intervals along the circumference of the fixed iron core 61, and the through holes 611 pass through the inner side wall of the fixed iron core 61 and the outer side wall of the fixed iron core 61. After the fluid flows out along the upper end of the second pressure relief hole section 3212, it flows along the through hole 611 to the outlet 12, and then the fluid flows from the outlet 12 to the outside of the valve 100. In this way, the pressure relief hole 321 and the outlet 12 can be connected by setting the through hole 611, thereby improving the smoothness of the fluid flow, which is beneficial to the normal use of the valve 100. In addition, the through hole 611 has a simple structure, which reduces the production difficulty of the fixed iron core 61, thereby helping to improve the production rate of the fixed iron core 61.

[0085] According to some embodiments of the present invention, referring to Figure 2 and Fig.12 At least one flow hole 612 is formed on the fixed iron core 61. The driving assembly 6 further includes an iron core cover 63, which is disposed on the moving iron core 62. The iron core cover 63 and the moving iron core 62 jointly define a moving iron core cavity 631. The moving iron core 62 is movably disposed in the moving iron core cavity 631. The pressure relief hole 321 is connected to the moving iron core cavity 631 through the flow hole 612.

[0086] For example, in Figure 2 and Fig.12 In the example, two flow holes 612 are provided, and the flow holes 612 penetrate the inner side wall of the fixed iron core 61 and the upper surface of the fixed iron core 61 in the up-down direction. The moving iron core 62 is arranged in the iron core cover 63, and the moving iron core 62 can move in the up-down direction in the iron core cover 63. The fluid flowing to the fixed iron core 61 through the pressure relief hole 321 can flow into the moving iron core cavity 631 through the flow hole 612. With such a configuration, the iron core cover 63 can protect the moving iron core 62, thereby preventing the moving iron core 62 from being damaged, thereby extending the service life of the moving iron core 62. In addition, the flow balance of the fluid between the moving iron core cavity 631 and the fixed iron core 61 and the valve core fitting 2 can be ensured through the flow hole 612, thereby avoiding the pressure imbalance at the moving iron core cavity 631 and the second valve core 5, which is not conducive to the movement of the moving iron core 62 and the second valve core 5, and then the valve 100 can be used normally (for example, the valve 100 can be normally attracted).

[0087] According to some embodiments of the present invention, referring to Figure 2 and Figure 7 The first valve core 3 has a first pressure-bearing surface 34 and a second pressure-bearing surface 35. The second pressure-bearing surface 35 is located on the side of the first pressure-bearing surface 34 away from the inlet 11. The first valve core 3 is configured to separate from the side surface of the valve body 1 where the inlet 11 is located when the pressure applied to the first pressure-bearing surface 34 is greater than the pressure applied to the second pressure-bearing surface 35, so that the inlet 11 and the outlet 12 are connected.

[0088] For example, in Figure 2 and Figure 7 In the example, the first pressure-bearing surface 34 is located at the lower side of the first valve core 3, and the second pressure-bearing surface 35 is located at the upper side of the first valve core 3. When the pressure difference between the pressure on the first pressure-bearing surface 34 and the pressure on the second pressure-bearing surface 35 changes, the opening of the connection between the inlet 11 and the outlet 12 changes through the first valve core 3 to adjust the flow rate of the outlet 12. When the pressure difference between the pressure on the first pressure-bearing surface 34 and the pressure on the second pressure-bearing surface 35 is large, the connection opening of the first valve core 3 is large, and the flow rate of the fluid flowing between the first pressure-bearing surface 34 and the valve body 1 is large, that is, the flow rate at the outlet 12 is large. When the pressure difference between the pressure on the first pressure-bearing surface 34 and the pressure on the second pressure-bearing surface 35 is small, the connection opening of the first valve core 3 is small, and the flow rate of the fluid flowing between the second pressure-bearing surface 35 and the valve body 1 is small, that is, the flow rate at the outlet 12 is small. Thus, the opening and closing degree of the first valve core 3 itself is adjusted by adjusting the pressure difference between the first pressure-bearing surface 34 and the second pressure-bearing surface 35, thereby adjusting the amount of fluid flowing out of the outlet 12 per unit time, and thus facilitating the control of the amount of fluid flowing out of the valve 100, so that the adjustment range is larger, which is conducive to controlling the damping force. In addition, the first valve core 3 is opened by pressure, which helps to shorten the response time of the valve 100. When the valve 100 is used in a vehicle, the driving comfort of the vehicle can be improved.

[0089] According to some embodiments of the present invention, referring to Figure 2 , the flow area of ​​the outlet 12 is larger than the maximum flow area when the first valve core 3 is separated from the side surface where the inlet 11 of the valve body 1 is located. For example, when there are multiple outlets 12, the flow area of ​​the outlet 12 is the sum of the cross-sectional areas of the multiple outlets 12. A groove 36 is formed at the lower end of the first valve core 3, and the maximum flow area is the product of the inner wall circumference of the groove 36 and the distance between the lower end face of the first valve core 3 and the inner wall of the valve body 1. With such an arrangement, throttling is avoided during the flow of the fluid, which is conducive to the rapid outflow of the fluid from the outlet 12, thereby facilitating the normal use of the valve 100. In addition, the outlet 12 has a simple structure, so it is easy to control the flow area of ​​the outlet 12, which is convenient for the production of the valve 100.

[0090] According to some embodiments of the present invention, referring to Figure 2 , Figure 8 and Fig. 9 At least one notch 22 is formed on the side of the valve core fitting 2 facing the inlet 11 . When the first valve core 3 is separated from the side surface of the valve body 1 where the inlet 11 is located, the inlet 11 is connected with the outlet 12 through the notch 22 .

[0091] For example, in Figure 2 , Figure 8 and Fig. 9 In the example, the notch 22 is formed at the lower end of the valve core fitting 2, and there are four notches 22, which are arranged at intervals along the circumference of the valve core fitting 2. When the first valve core 3 is separated from the side surface where the inlet 11 of the valve body 1 is located, the fluid enters the valve body 1 along the notch 22 from the inlet 11 through the gap between the lower end surface of the first valve core 3 and the inner wall of the valve body 1, and then flows out from the outlet 12. In this way, after the first valve core 3 is opened, the notch 22 can connect the inlet 11 and the outlet 12, so as to facilitate the smooth flow of the fluid, which is conducive to the flow of the fluid to the outlet 12, and further conducive to the normal use of the valve 100. In addition, the notch 22 has a simple structure, which reduces the difficulty of producing the valve core fitting 2 and helps to improve the production rate of the valve core fitting 2. In addition, the valve 100 has a relatively simple structure through a cleverly designed flow channel structure, and the pressure on the valve 100 and the flow rate through the valve 100 are stable and controllable. Moreover, a small flow enters between the first valve core 3 and the valve core fitting 2 to open the second valve core 5, and then the first valve core 3 is opened by the pressure difference between the pressure on the first pressure-bearing surface 34 and the pressure on the second pressure-bearing surface 35, and the electromagnetic force generated by applying different currents is used to adjust the moving iron core 61 to adjust the flow, thereby achieving the effect of proportional adjustment of the damping force of the shock absorber 200, and also making the valve 100 a valve 100 with dual adjustable damping force, which is more conducive to adjusting the connectivity opening of the first valve core 3.

[0092] According to some embodiments of the present invention, referring to Figure 2 , Figure 4 and Figure 5 A protrusion 13 extending toward the first valve core 3 is provided at the outer periphery of the inlet 11, and an end surface of the first valve core 3 adjacent to the inlet 11 is detachably engaged with the protrusion 13. Figure 2 , Figure 4 and Figure 5 In the example, the protrusion 13 is located at the outer periphery of the upper end of the inlet 11, the protrusion 13 extends upward, and the lower end surface of the first valve core 3 and the upper end surface of the protrusion 13 are detachably matched. In this way, by setting the protrusion 13, the contact area between the first valve core 3 and the inner wall of the valve body 1 is reduced, thereby reducing the friction between the first valve core 3 and the valve body 1, which is conducive to the separation of the first valve core 3 from the valve body 1, thereby improving the smoothness of the movement of the first valve core 3 and shortening the response time of the valve 100. In addition, the upper end surface of the protrusion 13 can be a sealing surface, which is used to seal with the lower end of the first valve core 3 by suction, plays a role in adjusting the flow rate, and also improves the sealing performance between the lower end surface of the first valve core 3 and the protrusion 13.

[0093] Optionally, refer to Figure 2A through hole 613 is formed on the fixed iron core 61. The through hole 613 penetrates the inner side surface and the upper side surface of the fixed iron core 61 in the up-down direction. The through hole 613 is located between the two flow holes 612. A first sleeve 614 is provided at the through hole 613. The first sleeve 614 is fixed to the fixed iron core 61 by riveting. The outer peripheral surface of the first sleeve 614 is connected to the inner wall of the through hole 613. The lower end of the second valve core 5 passes through the first sleeve 614. The upper end of the inner side wall of the iron core cover 63 is provided with a second sleeve 632. The upper end of the second valve core 5 passes through the second sleeve 632. In this way, the first sleeve 614 and the second sleeve 632 guide the second valve core 5, so that the second valve core 5 can be guided to move up and down, which helps to improve the stability and reliability of the movement of the second valve core 5. In addition, the first sleeve 614 can protect the fixed iron core 61 and prevent the fixed iron core 61 from being damaged during the movement of the second valve core 5, thereby extending the service life of the fixed iron core 61. Moreover, the first sleeve 614 and the second sleeve 632 have simple structures and are easy to replace, which facilitates the maintenance of the valve 100.

[0094] According to some optional embodiments of the present invention, referring to Figure 1 , the valve 100 further includes a coil assembly 7, a coil housing 8, and a magnetic isolation ring 9, the magnetic isolation ring 9 is pressed on the bottom of the core cover 63, the coil assembly 7 is sleeved outside the core cover 63, the coil housing 8 is sleeved outside the upper end of the coil assembly 7 and the valve body 1, and the lower end of the coil housing 8 is threadedly connected to the upper outer side of the valve body 1. As a result, it is convenient to assemble and disassemble the coil housing 8 and the valve body 1, thereby improving the assembly efficiency and disassembly efficiency of the valve 100. In addition, after the coil assembly 7 is energized, the moving iron core 62 can move downward with the second valve core 5, and the magnitude of the electromagnetic force can be controlled by the magnitude of the current applied to the coil assembly 7 to adjust the opening and closing force of the second valve core 5, thereby controlling the magnitude of the flow at the outlet 12. In addition, the magnetic isolation ring 9 can prevent the core cover 63 from moving with the moving iron core 62 moving downward, which is beneficial to the normal use of the valve 100.

[0095] Optionally, the moving iron core 62 is a magnetic conductor, and the second valve core 5 is a non-magnetic conductor. Therefore, after the valve 100 is powered on, it is convenient to adjust the magnitude of the electromagnetic force by the magnitude of the current to adjust the movement of the first valve core 3 driven by the moving iron core 62, thereby facilitating the normal use of the valve 100.

[0096] The specific use process of the valve 100 in this application is roughly as follows:

[0097] When the valve 100 is not energized, the flow rate of fluid, such as oil, through the valve 100 is relatively large when the shock absorber 200 is compressed. At this time, the damping force generated by the shock absorber 200 is very small (e.g. Figure 1When the valve 100 is not powered on, the lower end of the second valve core 5 is separated from the second pressure relief hole section 3212, and the fluid flows from the inlet 11 along the throttle hole 33 into the space between the first valve core 3 and the valve core fitting 2, and then the fluid flows from the first pressure relief hole section 3211 and the second pressure relief hole section 3212 into the space between the valve core fitting 2 and the fixed iron core 61 in sequence, a small amount of fluid enters the moving iron core cavity 631 along the flow hole 612, a large amount of fluid flows along the through hole 611 into the space between the fixed iron core 61 and the valve body 1, and then flows out from the outlet 12 to the outside of the valve 100, that is, the flow path is the first path (as shown in FIG. Figure 1 As shown by the arrow A in the middle. When the flow rate is relatively large, the cross section of the throttle hole 33 is small, which hinders the fluid. The cross section of the pressure relief hole 321 is large, and the fluid between the first valve core 3 and the valve core matching part 2 can flow out quickly. When a pressure difference is formed between the first pressure-bearing surface 34 of the first valve core 3 and the second pressure-bearing surface 35 of the first valve core 3, the fluid pushes the first valve core 3 to move upward, and the first valve core 3 is opened. At this time, the fluid can quickly flow from the lower end of the first valve core 3 and the inner wall of the valve body 1 through the gap 22 to the outlet 12, and then the fluid flows out of the valve body 1 from the outlet 12, that is, the flow path is the second path (such as Figure 1 (indicated by arrow B in the middle).

[0098] When the valve 100 is powered on, the moving iron core 62 drives the second valve core 5 to move downward, and the lower end of the second valve core 5 is sealed with the upper end of the second pressure relief hole section 3212. When the shock absorber 200 is working, the magnitude of the opening and closing force between the second valve core 5 and the second pressure relief hole section 3212 can be controlled by the magnitude of the current supplied to the coil assembly 7, thereby controlling the magnitude of the flow rate to adjust the damping force of the shock absorber 200. When the full current is applied to the coil assembly 7, the contact force between the lower end face of the first valve core 3 and the upper end face of the protrusion 13 is the largest, and the flow rate of the fluid passing through the valve 100 is small. At this time, the damping force generated by the shock absorber 200 is the largest.

[0099] When the valve 100 is energized, the coil assembly 7 generates an electromagnetic force to drive the moving iron core 62 to drive the second valve core 5 to move downward (the force is as follows Fig.14 As shown by the arrow C in the middle, the lower end of the second valve core 5 cooperates with the upper end of the second pressure relief hole section 3212 to seal the pressure relief hole 321. When the fluid flows from the inlet 11 through the throttle hole 33 into the space between the first valve core 3 and the valve core fitting 2, and then the fluid flows from the first pressure relief hole section 3211 to the upper end of the second pressure relief hole section 3212, when the pressure of the fluid is greater than the electromagnetic force, the pressure of the fluid pushes the second valve core 5 to move upward, and the lower end of the second valve core 5 is separated from the second pressure relief hole section 3212, and the fluid flows from the second pressure relief hole section 3212 to between the valve core fitting 2 and the fixed iron core 61, a small amount of fluid enters the moving iron core cavity 631 along the flow hole 612, and a large amount of fluid flows along the through hole 611 into the space between the fixed iron core 61 and the valve body 1, and then flows out from the outlet 12 to the outside of the valve 100, that is, the flow path is the first path (such as Fig.14 As shown by the arrow A in the middle. When the lower end of the second valve core 5 is separated from the second pressure relief hole section 3212, the cross section of the throttling hole 33 is smaller, and the cross section of the pressure relief hole 321 is larger, and the fluid between the first valve core 3 and the valve core fitting 2 can flow out quickly. When a pressure difference is formed between the first pressure-bearing surface 34 of the first valve core 3 and the second pressure-bearing surface 35 of the first valve core 3, the fluid pressure pushes the first valve core 3 to move upward, and the first valve core 3 is opened. At this time, after the fluid flows in from the inlet 11, the fluid can quickly flow from the lower end of the first valve core 3 and the inner wall of the valve body 1 through the notch 22 to the outlet 12, and then the fluid flows out of the valve body 1 from the outlet 12, that is, the flow path is the second path (such as Fig.14 (indicated by arrow B in the middle).

[0100] According to the shock absorber 200 of the second embodiment of the utility model, Fig.15 , including a valve 100 according to the first aspect embodiment of the utility model.

[0101] For example, in Fig.15 In the example, in the shock absorber 200, when there are two valves 100, the two valves 100 are respectively located on both sides of the central axis of the shock absorber 200 along the left and right directions. The valve 100 on the left side may be a compression valve 201, and the valve 100 on the right side may be a restoring valve 202. When the shock absorber 200 is in a compression state, the fluid first flows through the compression valve 201 and then flows through the restoring valve 202. During the process of the fluid flowing through the compression valve 201, the compression valve 201 can adjust and control the damping force, while the restoring valve 202 only plays a role of connection and does not play a role in damping adjustment. When the shock absorber 200 is in a restoring state, the fluid first flows through the restoring valve 202 and then flows through the compression valve 201. During the process of the fluid flowing through the restoring valve 202, the restoring valve 202 can adjust and control the damping force, while the compression valve 201 only plays a role of connection and does not play a role in damping adjustment. Thus, the fluid can flow back and forth through the compression valve 201 and the restoring valve 202 to achieve the vibration reduction effect of the shock absorber 200. In addition, the compression valve 201 of the shock absorber 200 controls compression, and the restoring valve 202 controls restoration. The compression valve 201 and the restoring valve 202 are controlled and used separately without interfering with each other, and the damping force can be adjusted separately, thereby improving the performance of the shock absorber 200.

[0102] The chassis (not shown) according to the embodiment of the third aspect of the utility model comprises the shock absorber 200 according to the embodiment of the second aspect of the utility model.

[0103] According to the chassis of the utility model, the use performance of the chassis is improved by adopting the shock absorber 200.

[0104] The vehicle according to the fourth aspect of the present invention (not shown) comprises the valve 100 according to the first aspect of the present invention, or the shock absorber 200 according to the second aspect of the present invention, or the chassis according to the third aspect of the present invention.

[0105] According to the vehicle of the utility model, by adopting the valve 100, or the shock absorber 200, or the chassis, the use performance of the vehicle is improved and the driving comfort of the vehicle is improved.

[0106] The valve 100 , the shock absorber 200 , the chassis and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0107] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0108] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0109] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A valve, characterized in that: include: a valve body, wherein an inlet and an outlet are formed on the valve body; A valve core fitting part, wherein the valve core fitting part is arranged in the valve body; A first valve core, wherein the first valve core is movably disposed in the valve core matching component; An elastic member is provided between the first valve core and the valve core matching member, and the elastic member always pushes the first valve core toward the inlet to always cut off the communication between the inlet and the outlet.

2. The valve according to claim 1, characterized in that A receiving groove is formed on a side surface of the first valve core away from the inlet, and the elastic member abuts between the bottom wall of the receiving groove and the valve core matching member.

3. The valve according to claim 2, characterized in that The outer circumferential surface of the first valve core and the inner circumferential surface of the valve core fitting piece are slidably and sealingly matched along the moving direction of the first valve core, and the outer circumferential surface of the first valve core is located on the outer circumferential side of the accommodating groove.

4. The valve according to claim 2, characterized in that A guide hole is formed on the valve core fitting, and the guide hole is located on a side of the valve core fitting away from the inlet; A guide portion extending along the moving direction of the first valve core is provided in the accommodating groove, an end of the guide portion away from the inlet is slidingly sealed and fitted in the guide hole, and the elastic member is sleeved on the outer peripheral side of the guide portion.

5. The valve according to claim 4, characterized in that A throttle hole is formed on the first valve core, and the inlet is connected with the interior of the valve core fitting through the throttle hole; A pressure relief hole is formed on the guide portion, and the interior of the valve core fitting is communicated with the outlet through the pressure relief hole.

6. The valve according to claim 5, characterized in that The cross-sectional area of ​​the throttling hole is smaller than the cross-sectional area of ​​the pressure relief hole.

7. The valve according to claim 5, characterized in that The pressure relief hole includes at least one first pressure relief hole section and a second pressure relief hole section, the first pressure relief hole section extends radially along the guide portion, the first pressure relief hole section penetrates the outer circumferential surface of the guide portion and is connected with the interior of the valve core fitting, one end of the second pressure relief hole section penetrates the end surface of the guide portion away from the inlet and is connected with the outlet, and the other end of the second pressure relief hole section is connected with the first pressure relief hole section.

8. The valve according to claim 5, characterized in that Further including: A second valve core, the second valve core is movably arranged on a side of the valve body away from the inlet, one end of the second valve core is detachably matched with the pressure relief hole to connect and cut off the connection between the throttling hole and the outlet, and the second valve core is suitable for pushing the first valve core toward the inlet to cut off the connection between the inlet and the outlet.

9. The valve according to claim 8, characterized in that An inner wall surface of one end of the pressure relief hole adjacent to the second valve core extends obliquely in a direction away from the inlet and in a direction away from the central axis of the second valve core; An end surface of the second valve core adjacent to the pressure relief hole is formed into a spherical surface.

10. The valve according to claim 8, characterized in that The second valve core is a valve stem.

11. The valve according to claim 8, characterized in that Further including: A drive assembly is arranged on the valve body, and when the drive assembly is working, the drive assembly drives the second valve core to detachably cooperate with the first valve core.

12. The valve according to claim 11, characterized in that The drive assembly comprises: A fixed iron core, the fixed iron core is arranged on the valve body; A moving iron core is movably arranged on a side of the fixed iron core away from the first valve core along a moving direction of the first valve core, and the second valve core is fixedly connected to the moving iron core.

13. The valve according to claim 12, characterized in that The valve core fitting is fitted in the fixed iron core. At least one through hole is formed on the fixed iron core. The pressure relief hole is connected with the outlet through the through hole.

14. The valve according to claim 12, characterized in that At least one flow hole is formed on the fixed iron core; The drive assembly further comprises: The core cover is arranged on the moving iron core, the core cover and the moving iron core jointly define a moving iron core cavity, the moving iron core is movably arranged in the moving iron core cavity, and the pressure relief hole is connected with the moving iron core cavity through the flow hole.

15. The valve according to claim 1, characterized in that The first valve core has a first pressure-bearing surface and a second pressure-bearing surface, the second pressure-bearing surface is located on a side of the first pressure-bearing surface away from the inlet, and the first valve core is configured to separate from a side surface of the valve body where the inlet is located when the pressure applied to the first pressure-bearing surface is greater than the pressure applied to the second pressure-bearing surface so that the inlet and the outlet are connected.

16. The valve according to claim 15, characterized in that The flow area of ​​the outlet is larger than the maximum flow area when the first valve core is separated from a side surface of the valve body where the inlet is located.

17. The valve according to claim 15, characterized in that At least one notch is formed on the side surface of the valve core fitting at one end facing the inlet, and when the first valve core is separated from a side surface of the valve body where the inlet is located, the inlet is connected with the outlet through the notch.

18. The valve according to any one of claims 1 to 17, characterized in that A protrusion extending toward the first valve core is provided at the outer periphery of the inlet, and an end surface of the first valve core adjacent to the inlet is detachably matched with the protrusion.

19. A shock absorber, characterized in that: Comprising a valve according to any one of claims 1-18.

20. A chassis, characterized in that: Comprising a vibration damper according to claim 19.

21. A vehicle, characterized in that: Comprising a valve according to any one of claims 1 to 18, or a shock absorber according to claim 19, or a chassis according to claim 20.

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