Valve, shock absorber, chassis, and vehicle

Abstract

A vehicle, comprising a chassis, the chassis comprising a shock absorber, the shock absorber comprising a valve, and the valve comprising: a valve body, a valve element fitting, a first valve element, and an elastic member, wherein an inlet and an outlet are formed in the valve body; the valve element fitting is arranged inside the valve body; the first valve element is movably arranged inside the valve element fitting; and the elastic member is arranged between the first valve element and the valve element fitting, and the elastic member normally pushes the first valve element in the direction of the inlet to normally block the communication between the inlet and the outlet.

Description

Valves, shock absorbers, chassis and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to the Chinese patent application entitled “Valve, Shock Absorber, Chassis and Vehicle” filed with the State Intellectual Property Office of China on December 25, 2023, with application number 202323577880.2, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the field of vehicle technology, and in particular to a valve, a shock absorber, a chassis and a vehicle. Background Art

[0004] Shock absorbers are installed around the wheels of cars to reduce jolting during driving. When the car body and wheels move relative to each other, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber cavity to repeatedly flow from one cavity to another through different pores. This vibration energy is converted into heat energy from the oil and gas, which is dissipated into the atmosphere, allowing the shock absorber to operate efficiently within a relatively low temperature range.

[0005] In the related art, the shock absorber contains multiple valves, the valve structure is complex, and the production and processing are difficult.

[0006] Summary of the Invention

[0007] The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present disclosure is to provide a valve that uses an elastic member to push a first valve core to isolate the connection between an inlet and an outlet, thereby simplifying the valve structure, reducing the difficulty of valve production, and improving production efficiency.

[0008] A second objective of the present disclosure is to provide a shock absorber using the valve.

[0009] A third object of the present disclosure is to provide a chassis using the above-mentioned shock absorber.

[0010] A fourth objective of the present disclosure is to provide a vehicle using the valve, the shock absorber, or the chassis.

[0011] According to the valve of the first aspect embodiment of the present disclosure, it includes: a valve body, which is formed with an inlet and an outlet; 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.

[0012] According to the valve disclosed herein, the elastic member can push the first valve core downward to isolate the inlet from the outlet, making it easy to use and operate. Furthermore, this facilitates the stable movement of the first valve core within the valve core fitting, thereby improving the operational stability of the valve. Furthermore, the simple structure of the elastic member simplifies the valve structure, reducing its structural complexity, facilitating its production, processing, and use, while also reducing its production costs. When used in a vehicle, the valve can enhance driving comfort.

[0013] According to some embodiments of the present disclosure, a receiving groove is formed on a surface of the first valve core away from the inlet, and the elastic member is stopped between the bottom wall of the receiving groove and the valve core matching member.

[0014] According to some embodiments of the present disclosure, the outer circumferential surface of the first valve core and the inner circumferential surface of the valve core fitting are slidingly 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.

[0015] According to some embodiments of the present disclosure, 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 slidingly sealed and fitted in the guide hole, and the elastic member is sleeved on the outer peripheral side of the guide portion.

[0016] According to some embodiments of the present disclosure, 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.

[0017] According to some embodiments of the present disclosure, a cross-sectional area of ​​the throttling hole is smaller than a cross-sectional area of ​​the pressure relief hole.

[0018] According to some embodiments of the present disclosure, 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 the 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.

[0019] According to some embodiments of the present disclosure, 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 engaged 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.

[0020] According to some embodiments of the present disclosure, 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 into a spherical surface.

[0021] According to some embodiments of the present disclosure, the second valve core is a valve stem.

[0022] According to some embodiments of the present disclosure, the valve further includes: a drive assembly, which is provided 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.

[0023] According to some embodiments of the present disclosure, the drive 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.

[0024] According to some embodiments of the present disclosure, the valve core fitting is fitted in the fixed iron core, and at least one through hole is formed on the fixed iron core, and the pressure relief hole is connected to the outlet through the through hole.

[0025] According to some embodiments of the present disclosure, at least one circulation hole is formed on the fixed iron core; the drive 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 circulation hole.

[0026] According to some embodiments of the present disclosure, 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 the 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.

[0027] According to some embodiments of the present disclosure, the flow area of ​​the outlet is larger than the maximum flow area when the first valve core is separated from the side surface of the valve body where the inlet is located.

[0028] According to some embodiments of the present disclosure, 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 the side surface of the valve body where the inlet is located, the inlet is connected to the outlet through the notch.

[0029] According to some embodiments of the present disclosure, 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 engaged with the protrusion.

[0030] A shock absorber according to an embodiment of the second aspect of the present disclosure includes a valve according to an embodiment of the first aspect of the present disclosure.

[0031] The chassis according to the third embodiment of the present disclosure includes the shock absorber according to the second embodiment of the present disclosure.

[0032] The vehicle according to the fourth aspect of the present disclosure includes the valve according to the first aspect of the present disclosure, or the shock absorber according to the second aspect of the present disclosure, or the chassis according to the third aspect of the present disclosure.

[0033] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] FIG1 is a schematic diagram of a valve according to an embodiment of the present disclosure;

[0036] FIG2 is a cross-sectional view of a valve according to an embodiment of the present disclosure, wherein the valve is in a non-energized state;

[0037] FIG3 is an enlarged view of the circled portion D in FIG2 ;

[0038] FIG4 is a schematic diagram of a valve body of a valve according to an embodiment of the present disclosure;

[0039] 5 is a cross-sectional view of a valve body according to an embodiment of the present disclosure;

[0040] FIG6 is a schematic diagram of a first valve core of a valve according to an embodiment of the present disclosure;

[0041] 7 is a cross-sectional view of a first valve core of a valve according to an embodiment of the present disclosure;

[0042] FIG8 is a schematic diagram of a valve body fitting of a valve according to an embodiment of the present disclosure;

[0043] 9 is a cross-sectional view of a valve body fitting of a valve according to an embodiment of the present disclosure;

[0044] FIG10 is a schematic diagram of the assembly of the second valve core and the movable iron core of the valve according to an embodiment of the present disclosure;

[0045] 11 is a cross-sectional view of an assembly of a second valve core and a movable iron core of a valve according to an embodiment of the present disclosure;

[0046] FIG12 is a schematic diagram of a fixed iron core of a valve according to an embodiment of the present disclosure;

[0047] FIG13 is a cross-sectional view of a fixed iron core of a valve according to an embodiment of the present disclosure;

[0048] FIG14 is a schematic diagram of fluid flow in a power-on state of a valve according to an embodiment of the present disclosure;

[0049] FIG15 is a schematic diagram of a shock absorber according to an embodiment of the present disclosure;

[0050] FIG16 is a schematic block diagram of a chassis according to an embodiment of the present disclosure;

[0051] FIG17 is a schematic block diagram of a vehicle according to an embodiment of the present disclosure;

[0052] FIG18 is another schematic block diagram of a vehicle according to an embodiment of the present disclosure;

[0053] FIG19 is yet another schematic block diagram of a vehicle according to an embodiment of the present disclosure.

[0054] Figures and Symbols: 100, valve; 1, valve body; 11, inlet; 12, outlet; 121, oil outlet hole; 13, protrusion; 2, valve core fitting; 21, guide hole; 22, notch; 3, first valve core; 31, accommodating groove; 32, guide portion; 321, pressure relief hole; 3211, first pressure relief hole section; 3212, second pressure relief hole section; 33, throttle hole; 34, first pressure-bearing surface; 35, second pressure-bearing surface; 36, groove; 4, elastic member; 5, second valve core; 51, valve stem; 6, drive assembly; 61, fixed iron core; 611, through hole; 612, flow hole; 613, through hole; 614, first shaft sleeve; 62, moving iron core; 63, iron core cover; 631, moving iron core cavity; 632, second shaft sleeve; 7. Coil assembly; 8. Coil housing; 9. Magnetic isolation ring; 200. Shock absorber; 201. Compression valve; 202. Restoration valve; 203. Chassis; 204. Vehicle; 400. Inner wall; 500. Outer wall; 700. Inner wall; 800. Upper surface. DETAILED DESCRIPTION

[0055] The embodiments of the present disclosure are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The valve 100 according to the embodiment of the first aspect of the present disclosure is described below with reference to Figures 1 to 14. The valve 100 of the present application is described in detail using the example of a shock absorber 200.

[0056] As shown in FIG1 and FIG2 , the valve 100 according to the embodiment of the first aspect of the present disclosure includes a valve body 1 , a valve core fitting 2 , a first valve core 3 and an elastic member 4 .

[0057] Specifically, the valve body 1 is formed with an inlet 11 and an outlet 12. The valve core assembly 2 is disposed within the valve body 1, and the first valve core 3 is movably disposed within the valve core assembly 2. For example, in the examples of Figures 1 and 2, 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 vertical direction within the valve core assembly 2. The first valve core 3 moves in the vertical direction to separate and connect the inlet 11 and the outlet 12. This arrangement allows fluid (e.g., oil) to flow into the valve body 1 from the inlet 11 and then out of the valve body 1, thereby facilitating the adjustment and control of the damping force of the valve 100. In addition, when the first valve core 3 moves, it moves within the valve core assembly 2, improving the assembly stability of the first valve core 3 and the valve core assembly 2 and preventing the first valve core 3 from shaking during movement, thereby improving the reliability of the first valve core 3 and, in turn, the stability of the valve 100.

[0058] In conjunction with Figure 2, the elastic member 4 is arranged between the first valve core 3 and the valve core fitting 2. The elastic member 4 often pushes the first valve core 3 toward the inlet 11 to often block the connection between the inlet 11 and the outlet 12 (that is, the valve 100 can be a normally closed valve). For example, in the example of Figure 2, 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 use and operation of the valve 100 is simple, and it is convenient to push the first valve core 3 to reset smoothly through the elastic member 4 to block 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 structure of the elastic member 4 is simple, 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.

[0059] According to the valve 100 disclosed herein, the elastic member 4 can push the first valve core 3 downward to isolate the connection between the inlet 11 and the outlet 12, making it convenient and easy to use. Furthermore, this facilitates the stable movement of the first valve core 3 within the valve core fitting 2, thereby improving the operational stability of the valve 100. Furthermore, the simple structure of the elastic member 4 simplifies the structure of the valve 100, reduces the structural complexity of the valve 100, facilitates the production, processing, and use of the valve 100, and can also reduce the production cost of the valve 100. When the valve 100 is used in a vehicle 204, it can improve the driving comfort of the vehicle 204.

[0060] According to some embodiments of the present disclosure, referring to Figures 2, 6, and 7, a receiving groove 31 is formed on the surface of the first valve core 3 on the side facing away from the inlet 11. The elastic member 4 abuts between the bottom wall of the receiving groove 31 and the valve core fitting 2. For example, in the examples of Figures 2, 6, and 7, the receiving groove 31 is formed in the upper portion 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 portion of the elastic member 4 abuts against the sidewalls of the receiving groove 31. With this arrangement, the sidewalls of the receiving groove 31 can limit the lower portion of the elastic member 4, thereby preventing the elastic member 4 from deflecting during compression or deformation recovery, thereby improving the stability of the elastic member 4 in use. Furthermore, the receiving groove 31 serves to position the elastic member 4, facilitating quick assembly of the elastic member 4 with the first valve core 3 and improving the stability of the elastic member 4 with the first valve core 3 and the valve core fitting 2.

[0061] According to some embodiments of the present disclosure, referring to Figure 2, the outer circumferential surface of the first valve core 3 and the inner circumferential surface of the valve core fitting 2 are slidingly and sealingly matched 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.

[0062] For example, in the example of FIG2 , the cross-section of the valve core fitting 2 along the vertical direction is roughly in the shape of an inverted "U." The outer peripheral surface of the first valve core 3 is clearance-fitted with the inner peripheral surface of the valve core fitting 2. Because the clearance is small and smooth, it can be regarded as a sliding seal for a 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. This arrangement improves the sliding sealing performance between 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 400 of the valve core fitting 2, thereby facilitating the fluid to flow to the position between the first valve core 3 and the valve core fitting 2, thereby facilitating 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 thereby improving the reliability of the use of the valve 100.

[0063] According to some embodiments of the present disclosure, referring to FIG. 2 , a guide hole 21 is formed in the valve core fitting 2, located on a side of the valve core fitting 2 away from the inlet 11. A guide portion 32 is provided within the accommodating groove 31, extending along the movement direction of the first valve core 3. The end of the guide portion 32 away from the inlet 11 is slidably and sealingly engaged within the guide hole 21, and the elastic member 4 is sleeved around the outer circumference of the guide portion 32.

[0064] For example, in the example of FIG2 , the guide hole 21 is located on the upper side of the valve core fitting 2. The guide hole 21 extends vertically through the inner sidewall 400 and the outer sidewall 500 of the valve core fitting 2. The guide portion 32 extends vertically, with the lower end surface of the guide portion 32 connected to the bottom wall of the accommodating groove 31. The upper end of the guide portion 32 passes through the guide hole 21. The outer peripheral surface of the upper end of the guide portion 32 is gap-fitted with the sidewall of the guide hole 21. Because the gap is small and smooth, it can be regarded as a sliding sealing fluid such as oil. With this arrangement, the inner wall of the guide hole 21 guides the guide portion 32, thereby further preventing the first valve core 3 from swinging during the up and 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 ensured, thereby improving the smoothness of the up and down movement of the first valve core 3 and facilitating the up and down movement of the first valve core 3. Furthermore, the sealing performance of the assembly between the guide portion 32 and the guide hole 21 is improved, preventing fluid from flowing between the outer peripheral surface of the guide portion 32 and the guide hole 21, thereby facilitating the normal use of the valve 100. Furthermore, the guide portion 32 acts as a limiter for the elastic member 4, thereby preventing the elastic member 4 from shaking during the upward and downward movement of the first valve core 3, thereby improving the stability of the elastic member 4 during use and the stability of the first valve core 3 during movement. Furthermore, the guide portion 32 serves as a guide and positioning function, facilitating the assembly of the elastic member 4 with the guide portion 32, thereby facilitating the assembly of the elastic member 4 with the first valve core 3, thereby improving the assembly efficiency of the valve 100 and the reliability of the elastic member 4 during use.

[0065] According to some embodiments of the present disclosure, referring to Figures 2 and 7 , a throttle hole 33 is formed on the first valve core 3, through which the inlet 11 communicates with the interior of the valve core fitting 2. A pressure relief hole 321 is formed on the guide portion 32, through which the interior of the valve core fitting 2 communicates with the outlet 12.

[0066] For example, in the examples of Figures 2 and 7, the throttle hole 33 passes through the lower end surface of the first valve core 3 and the bottom wall of the accommodating groove 31 in the up and down directions, and the inlet 11 is connected to 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 (as shown by arrow A in Figure 2). With this arrangement, the first valve core 3 has a simple structure, a clever design, and is easy to produce and process, which reduces production costs. In addition, it is conducive to the smooth flow of fluid between the inlet 11 and the outlet 12, which is conducive to the adjustment of the damping force of the valve 100.

[0067] Furthermore, referring to FIG2 , the cross-sectional area of ​​the throttle hole 33 is smaller than the cross-sectional area of ​​the pressure relief hole 321. With this arrangement, the flow rate of 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 fluid flowing out from between the first valve core 3 and the valve core fitting 2. This reduces the pressure at the pressure relief hole 321, thereby increasing the pressure on the lower side of the first valve core 3 relative to the pressure on the upper side of the first valve core 3. 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 propel the first valve core 3 upward, thereby connecting the inlet 11 and the outlet 12. This allows the fluid to flow from the inlet 11 along the space between the lower side of the first valve core 3 and the inner wall of the valve body 1 to the outlet 12, and then out of the outlet 12. At this point, the fluid flow path is the second path (as indicated by arrow B in FIG2 ). As a result, the fluid can flow along both the first and second paths simultaneously, increasing the flow rate of the fluid through the valve 100 and thus further facilitating 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 fluid accumulation in the first valve core 3, which is more conducive to the normal use of the valve 100.

[0068] According to some embodiments of the present disclosure, referring to Figures 2 and 7, the pressure relief hole 321 includes at least a 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 passes through the outer peripheral 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 passes through the end surface of the guide portion 32 away from the inlet 11 and is connected to the outlet 12, and the other end of the second pressure relief hole section 3212 is connected to the first pressure relief hole section 3211.

[0069] For example, in the examples shown in Figures 2 and 7 , the first pressure relief hole section 3211 extends horizontally, while the second pressure relief hole section 3212 extends vertically. The upper end of the second pressure relief hole section 3212 penetrates the upper side of the guide portion 32 and communicates with the outlet 12. The end of the first pressure relief hole section 3211, which is adjacent to the inner sidewall 400 of the valve core assembly 2, penetrates the outer circumference of the guide portion 32, while the lower end of the second pressure relief hole section 3212 communicates with the first pressure relief hole section 3211. After fluid enters the inlet 11, it flows through the throttle hole 33 to the first valve core 3 and the valve core assembly 2. It then flows sequentially along the first and second pressure relief hole sections 3211, 3212, to the outlet 12, and ultimately out of the valve 100. This configuration simplifies the structures of the first and second pressure relief hole sections 3211, 3212, thereby reducing the difficulty, speed, and cost of producing the pressure relief hole 321. Moreover, it is also effectively ensured that the fluid can flow through the pressure relief hole 321, thereby helping the valve 100 to be used normally.

[0070] According to some embodiments of the present disclosure, 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 engaged 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.

[0071] For example, in the example of FIG. 2 , the second valve core 5 is located in the upper portion of the valve body 1 . When the lower end of the second valve core 5 is separated from the pressure relief hole 321 , the throttle hole 33 is connected to the outlet 12 . 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 isolate the throttle hole 33 from the outlet 12 . After the lower end of the second valve core 5 cooperates with the pressure relief hole 321 , the downward movement of the second valve core 5 pushes the first valve core 3 downward, causing the lower end surface of the first valve core 3 to contact the inner wall of the valve body 1 , isolating the inlet 11 from the outlet 12 . This arrangement facilitates the flow of fluid within the valve body 1 , thereby facilitating the normal use of the valve 100 . Furthermore, the cooperation between the lower end of the second valve core 5 and the pressure relief hole 321 allows the flow rate at the pressure relief hole 321 to be adjusted, thereby regulating the flow rate at the outlet 12 . In addition, the second valve core 5 is easy to operate and can easily cut off the communication between the inlet 11 and the outlet 12 , thereby facilitating the use of the valve 100 .

[0072] According to some embodiments of the present disclosure, referring to Figures 2 and 3 , the inner wall surface of the pressure relief hole 321 at one end 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 the second valve core 5 at one end adjacent to the pressure relief hole 321 is formed into a spherical surface.

[0073] For example, in the examples of Figures 2 and 3 , the sidewall of the upper end of the second pressure relief hole section 3212 extends at an angle. As a result, the lower end of the second valve core 5 and the pressure relief hole 321 can form a spherical-flat fit (i.e., the lower end of the second valve core 5 and the second pressure relief hole section 3212 are sealed by suction). In other words, the inner wall surface of the second pressure relief hole section 3212 can be configured as a flat surface to mate with the end surface of the lower end of the second valve core 5, ensuring a more secure fit between the second valve core 5 and the pressure relief hole 321. When the end surface of the lower end of the second valve core 5 engages with the second pressure relief hole section 3212, the second valve core 5 is less likely to separate from the second pressure relief hole section 3212 due to vibration of the valve 100. This improves the reliability of the fit between the second valve core 5 and the pressure relief hole 321, thereby enhancing the reliability of the valve 100 and the performance of the valve 100, thereby facilitating long-term, stable operation of the valve 100. However, the present invention is 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 cooperation between a spherical surface and an arc surface, that is, 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.

[0074] According to some embodiments of the present disclosure, referring to Figures 10 and 11 , the second valve core 5 is a valve stem 51. For example, in the examples shown in Figures 10 and 11 , the valve stem 51 extends vertically and is generally cylindrical. This provides a simple structure for the second valve core 5 and facilitates production, thereby increasing the production rate and reducing the production cost of the second valve core 5 .

[0075] According to some embodiments of the present disclosure, referring to FIG2 , valve 100 further includes a drive assembly 6 , which is disposed on valve body 1 . When drive assembly 6 is in operation, drive assembly 6 drives second valve core 5 to detachably engage with first valve core 3 . For example, in the example of FIG2 , drive assembly 6 is located above and connected to valve body 1 . Drive assembly 6 can act on second valve core 5 to drive it up and down. When drive assembly 6 drives second valve core 5 downward, the lower end of second valve core 5 engages with the inner wall of the upper end of second pressure relief hole section 3212 , blocking the connection between pressure relief hole 321 and outlet 12 . When drive assembly 6 drives second valve core 5 upward, the lower end of second valve core 5 separates from the inner wall of the upper end of second pressure relief hole section 3212 , connecting pressure relief hole 321 to outlet 12 . Thus, drive assembly 6 can act on second valve core 5 to drive its movement, thereby adjusting the opening of second valve core 5 and thereby regulating the flow rate at outlet 12 . In addition, the driving assembly 6 improves the movement reliability of the second valve core 5, thereby improving the reliability of the valve 100.

[0076] According to some embodiments of the present disclosure, referring to Figure 2, the drive 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, and the moving iron core 62 is movably arranged on the 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.

[0077] For example, in the example of Figure 2, 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 directions, 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 gap 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 setting 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 improving the reliability 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.

[0078] According to some embodiments of the present disclosure, referring to Figures 2, 12, and 13, the valve core fitting 2 is fitted within the fixed core 61. The fixed core 61 is formed with at least one through-hole 611, through which the pressure relief hole 321 communicates with the outlet 12. For example, in the examples of Figures 2, 12, and 13, the upper end of the valve core fitting 2 is inserted into the lower inner side of the fixed core 61, and the outer wall 500 of the valve core fitting 2 snaps into engagement with the lower end of the fixed core 61. Four through-holes 611 are provided, spaced apart along the circumference of the fixed core 61. The through-holes 611 extend through the inner and outer walls 700 of the fixed core 61. Fluid flows out through the upper end of the second pressure relief hole section 3212, then flows along the through-holes 611 to the outlet 12. The fluid then flows from the outlet 12 out of the valve 100. In this way, the pressure relief hole 321 and the outlet 12 can be connected by providing the through hole 611, thereby improving the smoothness of fluid flow and facilitating the normal use of the valve 100. In addition, the through hole 611 has a simple structure, which reduces the difficulty of producing the fixed iron core 61, thereby helping to increase the production rate of the fixed iron core 61.

[0079] According to some embodiments of the present disclosure, referring to Figures 2 and 12 , at least one flow hole 612 is formed in the fixed iron core 61. The drive assembly 6 further includes a core cover 63, which is disposed on the movable iron core 62. The core cover 63 and the movable iron core 62 together define a movable iron core cavity 631. The movable iron core 62 is movably disposed in the movable iron core cavity 631. The pressure relief hole 321 is connected to the movable iron core cavity 631 through the flow hole 612.

[0080] For example, in the examples of Figures 2 and 12 , two flow holes 612 are provided, extending vertically through the inner sidewall 700 and upper surface 800 of the fixed core 61. The movable core 62 is mounted within the core cover 63 and is movable vertically within the core cover 63. Fluid flowing into the fixed core 61 through the pressure relief hole 321 can flow into the movable core cavity 631 through the flow holes 612. With this arrangement, the core cover 63 protects the movable core 62, preventing damage and extending its service life. Furthermore, the flow holes 612 ensure fluid balance between the movable core cavity 631 and the fixed core 61 and valve core fitting 2, thereby preventing pressure imbalance between the movable core cavity 631 and the second valve core 5 from hindering movement of the movable core 62 and the second valve core 5. This ensures that the valve 100 can function normally (e.g., the valve 100 can be properly engaged).

[0081] According to some embodiments of the present disclosure, referring to Figures 2 and 7, the first valve core 3 has a first pressure-bearing surface 34 and a second pressure-bearing surface 35, and 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.

[0082] For example, in the examples of Figures 2 and 7 , the first pressure-bearing surface 34 is located below the first valve core 3, and the second pressure-bearing surface 35 is located above 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 communication opening between the inlet 11 and the outlet 12 changes via the first valve core 3 to regulate the flow rate at 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 communication opening of the first valve core 3 is large. In this case, 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 communication opening of the first valve core 3 is small. In this case, 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, by adjusting the pressure difference between the first pressure-bearing surface 34 and the second pressure-bearing surface 35, the opening and closing degree of the first valve core 3 is adjusted, thereby regulating the amount of fluid flowing out of the outlet 12 per unit time. This, in turn, facilitates control of the amount of fluid flowing out of the valve 100, expanding the adjustment range and facilitating control of the damping force. Furthermore, opening the first valve core 3 through pressure helps shorten the response time of the valve 100. When used in a vehicle 204, the valve 100 can improve the driving comfort of the vehicle 204.

[0083] According to some embodiments of the present disclosure, with reference to FIG2 , 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 a configuration, 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, which makes it easy to control the flow area of ​​the outlet 12, thereby facilitating the production of the valve 100.

[0084] According to some embodiments of the present disclosure, referring to Figures 2, 8 and 9, at least one notch 22 is formed on the side of the valve core fitting 2 at one end 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 to the outlet 12 through the notch 22.

[0085] For example, in the examples of Figures 2, 8, and 9, a notch 22 is formed at the lower end of the valve core fitting 2. Four notches 22 are provided, spaced apart along the circumference of the valve core fitting 2. When the first valve core 3 separates from the side surface of the valve body 1 where the inlet 11 is located, fluid enters the valve body 1 through the gap between the lower end surface of the first valve core 3 and the inner wall of the valve body 1, along the notch 22, and then flows out of the outlet 12. With this arrangement, after the first valve core 3 opens, the notch 22 connects the inlet 11 and the outlet 12, facilitating smooth fluid flow and facilitating fluid flow to the outlet 12, thereby facilitating the normal operation of the valve 100. Furthermore, the simple structure of the notch 22 reduces the difficulty in producing the valve core fitting 2 and helps increase the production rate of the valve core fitting 2. Furthermore, the valve 100, through its cleverly designed flow path structure, is relatively simple in structure, and the pressure acting 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.

[0086] According to some embodiments of the present disclosure, referring to Figures 2, 4, and 5, a protrusion 13 extending toward the first valve core 3 is provided on the outer periphery of the inlet 11. The end surface of the first valve core 3 adjacent to the inlet 11 detachably engages with the protrusion 13. For example, in the examples of Figures 2, 4, and 5, the protrusion 13 is located on 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 detachably engages with the upper end surface of the protrusion 13. This configuration reduces the contact area between the first valve core 3 and the inner sidewall of the valve body 1, thereby reducing friction between the first valve core 3 and the valve body 1, facilitating separation of the first valve core 3 from the valve body 1, and thereby improving the smoothness of the movement of the first valve core 3 and shortening the response time of the valve 100. Furthermore, the upper end surface of the protrusion 13 can serve as a sealing surface, which is used to engage and seal with the lower end of the first valve core 3, thereby regulating the flow rate and improving the sealing performance between the lower end surface of the first valve core 3 and the protrusion 13.

[0087] Optionally, referring to FIG2 , a through hole 613 is formed on the fixed iron core 61. The through hole 613 extends vertically through the inner side surface and the upper side surface of the fixed iron core 61. The through hole 613 is located between the two circulation 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. A second sleeve 632 is provided at the upper end of the inner side wall of the core cover 63. The upper end of the second valve core 5 passes through the second sleeve 632. With this arrangement, the first sleeve 614 and the second sleeve 632 guide the second valve core 5, thereby guiding the second valve core 5 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 a simple structure and are easy to replace, thereby facilitating the maintenance of the valve 100.

[0088] According to some optional embodiments of the present disclosure, with reference to Figures 1 and 2, 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 onto 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 coil assembly 7 and the upper end of 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, the assembly and disassembly of the coil housing 8 and the valve body 1 are facilitated, 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 downward, thereby facilitating the normal use of the valve 100.

[0089] Optionally, the movable iron core 62 is a magnetic conductor, and the second valve core 5 is a non-magnetic conductor. Thus, after the valve 100 is energized, the magnitude of the electromagnetic force can be adjusted by adjusting the magnitude of the current to adjust the movement of the first valve core 3 driven by the movable iron core 62, thereby facilitating normal operation of the valve 100.

[0090] The specific use process of the valve 100 in this application is roughly as follows:

[0091] When the valve 100 is not energized and the shock absorber 200 is compressed, the flow rate of fluid, such as oil, through the valve 100 is relatively large. At this time, the damping force generated by the shock absorber 200 is very small (as shown in Figure 1). When the valve 100 is not energized, the lower end of the second valve core 5 is separated from the second pressure relief hole section 3212. 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. The fluid then flows from the first pressure relief hole section 3211 and the second pressure relief hole section 3212 in sequence into the space between the valve core fitting 2 and the fixed iron core 61. A small amount of fluid enters the movable 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 of the outlet 12 to the outside of the valve 100. That is, the flow path is the first path (as shown by arrow A in Figure 1). When the flow rate is relatively high, the cross-section of the throttle hole 33 is small, obstructing the flow. The cross-section of the pressure relief hole 321 is larger, allowing the fluid between the first valve core 3 and the valve core fitting 2 to flow out quickly. When a pressure differential forms 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 upward, opening the first valve core 3. At this point, 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. The fluid then flows out of the valve body 1 from the outlet 12, i.e., the flow path is the second path (as shown by arrow B in Figure 1).

[0092] When the valve 100 is energized, the movable iron core 62 drives the second valve core 5 downward, causing the lower end of the second valve core 5 to seal against the upper end of the second pressure relief hole section 3212. During operation, the shock absorber 200 can control the opening and closing force between the second valve core 5 and the second pressure relief hole section 3212 by adjusting the current supplied to the coil assembly 7, thereby controlling the flow rate and adjusting the damping force of the shock absorber 200. When full current is applied to the coil assembly 7, the contact force between the lower end surface of the first valve core 3 and the upper end surface of the protrusion 13 is maximum, and the flow rate of fluid through the valve 100 is low. At this time, the damping force generated by the shock absorber 200 is maximum.

[0093] When the valve 100 is energized, the coil assembly 7 generates electromagnetic force to drive the moving iron core 62 to drive the second valve core 5 to move downward (the force is shown by arrow C in Figure 14), and 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. 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 (as shown by arrow A in Figure 14). 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 throttle hole 33 is smaller, and the cross-section of the pressure relief hole 321 is larger. 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 (as shown by arrow B in Figure 14).

[0094] Referring to FIG. 15 , the shock absorber 200 according to the second embodiment of the present disclosure includes the valve 100 according to the first embodiment of the present disclosure.

[0095] For example, in the example of FIG15 , in a shock absorber 200, when there are two valves 100, the two valves 100 are located on either side of the central axis of the shock absorber 200 in the left-right direction. The left valve 100 may be a compression valve 201, and the right valve 100 may be a return valve 202. When the shock absorber 200 is in a compressed state, fluid flows first through the compression valve 201 and then through the return valve 202. During the flow through the compression valve 201, the compression valve 201 can adjust and control the damping force, while the return valve 202 only serves as a communication function and does not perform damping adjustment. When the shock absorber 200 is in a restored state, fluid flows first through the return valve 202 and then through the compression valve 201. During the flow through the return valve 202, the return valve 202 can adjust and control the damping force, while the compression valve 201 only serves as a communication function and does not perform damping adjustment. As a result, fluid can flow back and forth through the compression valve 201 and the return 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 return valve 202 controls recovery. The compression valve 201 and the return valve 202 are independently controlled and used without interfering with each other, and the damping force can be adjusted independently, thereby improving the performance of the shock absorber 200.

[0096] The chassis 203 according to the third embodiment of the present disclosure, as shown in FIG16 , includes the shock absorber 200 according to the second embodiment of the present disclosure.

[0097] According to the chassis 203 of the present disclosure, the use performance of the chassis 203 is improved by adopting the shock absorber 200 .

[0098] The vehicle 204 according to the fourth aspect embodiment of the present disclosure includes a valve 100 according to the first aspect embodiment of the present disclosure (as shown in Figure 17), or a shock absorber 200 according to the second aspect embodiment of the present disclosure (as shown in Figure 18), or a chassis 203 according to the third aspect embodiment of the present disclosure (as shown in Figure 19).

[0099] According to the vehicle 204 of the present disclosure, by adopting the valve 100 , the shock absorber 200 , or the chassis 203 , the performance of the vehicle 204 is improved, and the driving comfort of the vehicle 204 is improved.

[0100] Other structures and operations of the valve 100 , the shock absorber 200 , the chassis 203 and the vehicle 204 according to the embodiment of the present disclosure are well known to those skilled in the art and will not be described in detail here.

[0101] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure 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 cannot be understood as a limitation on the present disclosure.

[0102] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0103] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A valve (100), characterized in that, Comprising: A valve body (1) with an inlet (11) and an outlet (12) formed thereon; A spool fitting (2) disposed within the valve body (1); A first spool (3) movably disposed within the spool fitting (2); and An elastic member (4) disposed between the first spool (3) and the spool fitting (2), the elastic member (4) constantly pushing the first spool (3) in the direction towards the inlet (11) to constantly cut off the communication between the inlet (11) and the outlet (12).

2. The valve (100) according to claim 1, characterized in that, A receiving groove (31) is formed on the surface of the first spool (3) on the side away from the inlet (11), and the elastic member (4) abuts between the bottom wall of the receiving groove (31) and the spool fitting (2).

3. The valve (100) according to claim 2, characterized in that, The outer peripheral surface of the first spool (3) is in sliding sealing fit with the inner peripheral surface of the spool fitting (2) along the moving direction of the first spool (3), and the outer peripheral surface of the first spool (3) is located on the outer peripheral side of the receiving groove (31).

4. The valve (100) according to claim 2 or 3, characterized in that, A guiding hole (21) is formed on the spool fitting (2), and the guiding hole (21) is located on the side of the spool fitting (2) away from the inlet (11); A guiding portion (32) extending along the moving direction of the first spool (3) is provided in the receiving groove (31), one end of the guiding portion (32) away from the inlet (11) is in sliding sealing fit within the guiding hole (21), and the elastic member (4) is sleeved on the outer peripheral side of the guiding portion (32).

5. The valve (100) according to claim 4, characterized in that, A throttling hole (33) is formed on the first spool (3), and the inlet (11) communicates with the interior of the spool fitting (2) through the throttling hole (33); A pressure relief hole (321) is formed on the guiding portion (32), and the interior of the spool fitting (2) communicates with the outlet (12) through the pressure relief hole (321).

6. The valve (100) according to claim 5, characterized in that, The cross-sectional area of the throttling hole (33) is smaller than the cross-sectional area of the pressure relief hole (321).

7. The valve (100) according to claim 5 or 6, characterized in that, The pressure relief hole (321) includes: At least one first pressure relief hole section (3211) extending radially along the guiding portion (32), the first pressure relief hole section (3211) penetrating the outer peripheral surface of the guiding portion (32) and communicating with the interior of the spool fitting (2); and A second pressure relief hole section (3212), one end of the second pressure relief hole section (3212) penetrating the end face of the guiding portion (32) away from the inlet (11) and communicating with the outlet (12), and the other end of the second pressure relief hole section (3212) communicating with the first pressure relief hole section (3211).

8. The valve (100) according to any one of claims 5-7, characterized in that, Further comprising: A second spool valve (5), the second spool valve (5) being movably arranged on a side of the valve body (1) away from the inlet (11), one end of the second spool valve (5) being detachably engaged with the pressure relief hole (321) to connect and disconnect the communication between the throttle hole (33) and the outlet (12), and the second spool valve (5) being adapted to push the first spool valve (3) in the direction towards the inlet (11) to disconnect the communication between the inlet (11) and the outlet (12).

9. The valve (100) according to claim 8, characterized in that, The inner wall surface of the pressure relief hole (321) adjacent to one end of the second spool valve (5) extends obliquely in a direction away from the inlet (11) and in a direction away from the central axis of the second spool valve (5). One end face of the second spool valve (5) adjacent to the pressure relief hole (321) is formed as a spherical surface.

10. The valve (100) according to claim 8 or 9, characterized in that, The second spool valve (5) is a valve stem (51).

11. The valve (100) according to any one of claims 8 - 10, characterized in that, Further comprising: A drive assembly (6), the drive assembly (6) being arranged on the valve body (1), and when the drive assembly (6) operates, the drive assembly (6) drives the second spool valve (5) to be detachably engaged with the first spool valve (3).

12. The valve (100) according to claim 11, characterized in that, The drive assembly (6) comprises: A stationary iron core (61), the stationary iron core (61) being arranged on the valve body (1); and A movable iron core (62), the movable iron core (62) being movably arranged on a side of the stationary iron core (61) away from the first spool valve (3) along the moving direction of the first spool valve (3), and the second spool valve (5) being fixedly connected to the movable iron core (62).

13. The valve (100) according to claim 12, characterized in that, The spool valve fitting (2) is fitted in the stationary iron core (61), at least one through hole (611) is formed on the stationary iron core (61), and the pressure relief hole (321) is communicated with the outlet (12) through the through hole (611).

14. The valve (100) according to claim 12 or 13, characterized in that, At least one flow hole (612) is formed on the stationary iron core (61); The drive assembly (6) further comprises: An iron core cover (63), the iron core cover (63) being arranged on the movable iron core (62), the iron core cover (63) and the movable iron core (62) jointly defining a movable iron core cavity (631), the movable iron core (62) being movably arranged in the movable iron core cavity (631), and the pressure relief hole (321) being communicated with the movable iron core cavity (631) through the flow hole (612).

15. The valve (100) according to any one of claims 1 - 14, characterized in that, The first spool valve (3) has a first pressure bearing surface (34) and a second pressure bearing surface (35), the second pressure bearing surface (35) being located on a side of the first pressure bearing surface (34) away from the inlet (11), and the first spool valve (3) is configured such that when the pressure received by the first pressure bearing surface (34) is greater than the pressure received by the second pressure bearing surface (35), the first spool valve (3) is separated from the surface of the valve body (1) on the side where the inlet (11) is located to connect the inlet (11) and the outlet (12).

16. The valve (100) according to any one of claims 1-15, characterized in that, The flow area of the outlet (12) is greater than the maximum flow area when the first spool valve (3) is separated from the surface of the valve body (1) on the side where the inlet (11) is located.

17. The valve (100) according to any one of claims 1-16, characterized in that, At least one notch (22) is formed on a side surface of one end of the spool fitting (2) facing the inlet (11). When the first spool (3) is separated from the surface of the valve body (1) on the side where the inlet (11) is located, the inlet (11) communicates with the outlet (12) through the notch (22).

18. The valve (100) according to any one of claims 1-17, characterized in that, A protrusion (13) extending towards the first spool (3) is provided at the outer peripheral edge of the inlet (11), and an end face of one end of the first spool (3) adjacent to the inlet (11) is detachably fitted with the protrusion (13).

19. A shock absorber (200), characterized in that, Comprising a valve (100) according to any one of claims 1-18.

20. A chassis (203), characterized in that, Comprising a shock absorber (200) according to claim 19.

21. A vehicle (204), characterized in that, Comprising a valve (100) according to any one of claims 1-18, or a shock absorber (200) according to claim 19, or a chassis (203) according to claim 20.

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