Air spring stiffness valve and vehicle system thereof

Abstract

According to the air spring stiffness valve and the vehicle system thereof, the mechanism of a sealing assembly is improved, a sealing plug is provided with a containing groove, the sealing assembly is at least partially located in the containing groove, the sealing assembly comprises a base part and a sealing piece at least partially limited to the base part, and the sealing piece is in sealing fit with the sealing plug; the sealing plug can axially move relative to the valve seat component, the base portion of the sealing plug is always in dynamic seal fit with the inner edge portion, no matter the valve port portion of the air spring stiffness valve is opened or closed or the valve is in a middle actuation state, the base portion of the sealing assembly is always in dynamic seal fit with the inner edge portion of the valve seat assembly, and the influence of external pressure is small. And the reliability of sealing fit between the valve seat component and the sealing plug is relatively improved.

Description

[Technical Field]

[0001] This invention relates to the field of automotive technology, and in particular to an air spring stiffness valve and its automotive system. [Background Technology]

[0002] Air spring stiffness valves are commonly used in automotive frames to adjust frame height and regulate the stiffness of multi-chamber air springs. When the valve is open, the chamber volume increases, the volume of compressible gas increases, and the stiffness decreases; when the valve is closed, the chamber volume decreases, the volume of compressible gas decreases, and the stiffness increases. An air spring stiffness valve includes a valve seat, a moving core assembly, a head, and a sealing block component. The valve seat has a valve port, and the sealing block can abut against or move away from the valve port. A sealing lip component is provided between the sealing block and the head. The sealing lip component includes a support and two sealing lips (upper and lower). The sealing block has a groove. When the valve is open, the two sealing lips are located within the groove; when the valve is closed, the two sealing lips are located at the larger outer diameter of the sealing block, and the compression deformation of the sealing lips forms a sealing fit with the valve block. However, this sealing structure is prone to gas leakage risks. [Summary of the Invention]

[0003] Through long-term research, the inventors discovered that one of the important reasons for gas leakage is that there is pressure in the cavity formed between the two sealing lips and the outer circle of the sealing block. When the pressure is higher than the pressure on the outside of the two lips, internal leakage is likely to occur. The purpose of this invention is to provide a spring stiffness valve and its automotive system. By improving the structural design of the sealing component, the reliability of the sealing fit between the valve seat component and the sealing plug can be relatively improved.

[0004] This invention provides a spring stiffness valve, including a valve seat component, a connecting seat, a moving core, a valve stem, a sealing plug, and a sealing assembly. The valve seat component is either separately configured or integrally structured. The valve seat component has a valve port portion and an inner edge portion. The moving core can approach or move away from the connecting seat. One end of the valve stem is connected to the moving core, and the other end of the valve stem is connected to the sealing plug. The sealing plug can abut against or move away from the valve port portion.

[0005] The sealing plug has a receiving groove recessed from the outer surface of the sealing plug, the sealing assembly is at least partially located in the receiving groove, the sealing assembly includes a base and a sealing element at least partially located in the base, the sealing element is in sealing engagement with the sealing plug, the sealing plug is axially movable relative to the valve seat component and the base always maintains a dynamic sealing engagement with the inner edge.

[0006] The present invention provides a spring stiffness valve, which improves the mechanism of the sealing assembly by providing a receiving groove for the sealing plug. The sealing assembly is at least partially located in the receiving groove. The sealing assembly includes a base and a sealing element at least partially located in the base. The sealing element and the sealing plug are in a sealing fit. The sealing plug can move axially relative to the valve seat component, and the base always maintains a dynamic sealing fit with the inner edge. Regardless of whether the valve port of the spring stiffness valve is open, closed, or in an intermediate operating state, the base of the sealing assembly always maintains a dynamic sealing fit with the inner edge of the valve seat component, which is less affected by external pressure and relatively improves the reliability of the sealing fit between the valve seat component and the sealing plug.

[0007] This invention provides an automotive system including an air spring. The air spring includes an air spring stiffness valve and a mounting cavity. The mounting cavity has a main cavity and a secondary cavity. The air spring stiffness valve has a valve port. When the air spring stiffness valve is de-energized, the valve port is open, and the main cavity and the secondary cavity are connected. When the air spring stiffness valve is energized, the valve port is closed, and the main cavity and the secondary cavity are not connected. The cavity wall of the secondary cavity has a first mating hole and a second mating hole. The air spring stiffness valve has a fourth sealing element and a fifth sealing element. The fourth sealing element is sealed with the first mating hole, and the fifth sealing element is sealed with the second mating hole. The air spring stiffness valve has the above-described air spring stiffness valve structure.

[0008] The present invention provides an automotive system including a spring stiffness valve with the above-described structure. Regardless of whether the valve port of the spring stiffness valve is open, closed, or in an intermediate operating state, the base of the sealing component always maintains a dynamic sealing fit with the inner edge of the valve seat component, which is less affected by external pressure and relatively improves the reliability of the sealing fit between the valve seat component and the sealing plug. [Attached Image Description]

[0009] Figure 1 A cross-sectional view of the overall structure of the air spring stiffness valve provided by the present invention in the open state.

[0010] Figure 2 An enlarged cross-sectional view of the valve seat area of ​​an embodiment of the air spring stiffness valve provided by the present invention.

[0011] Figure 3 A cross-sectional schematic diagram of the end cap of the air spring stiffness valve is provided for the present invention;

[0012] Figure 4 An enlarged cross-sectional view of the valve seat area of ​​another embodiment of the air spring stiffness valve provided by the present invention.

[0013] Figure 5 A schematic diagram of the air spring structure of an automotive system equipped with an air spring stiffness valve, provided by the present invention. Attached Figure Description

[0014] Valve seat component 10A, inner edge portion 11A, valve seat 10, valve port portion 11, valve port 111, guide portion 12, riveting portion 13, first end face 14, second end face 15;

[0015] Support 20, body 21, upper surface 211, lower surface 212, inner edge 213, conical surface 214, small diameter 2141, large diameter 2142, extension 215, flange 23, first step 24, second step 25;

[0016] Connecting seat 30, end cap 30A, third step 35, fourth step 36, fixing seat 30B, lower end face 31, groove 32, upper end face 34;

[0017] Outer tube 40, deformable part 41, inner wall 42, outer tube stepped part 43; coil component 50, frame 51, coil 52; sleeve 60; moving core assembly 70, moving core 71, valve stem 72;

[0018] Sealing plug 80, sealing part 81, outer surface 82, receiving groove 83, upper wall 831, lower wall 832, bottom wall 833;

[0019] First body part 80A, second body part 80B, lower wall 81A, upper wall 81B, outer wall 82B

[0020] Sealing assembly 90, base 91, seal 92; sealing ring 100, buffer 110, elastic element 120;

[0021] Second seal 200, second seal 300, fourth seal 400, fifth seal 500; main cavity 200, secondary cavity 300, bladder 210, cavity wall 310, first mating hole 320, second mating hole 330

Detailed Implementation Methods

[0022] To enable those skilled in the art to better understand the technical solutions provided in this application, the technical solutions of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. This application improves the design of the air spring stiffness valve structure, focusing on optimizing and improving the sealing component mechanism and the connection relationship between the sealing component and the sealing plug and valve seat components. Through the corresponding design and improvement, the reliability of the sealing fit between the sealing component and the sealing plug can be relatively improved. Other components, such as coil components, can be adapted to the usage environment or system requirements.

[0023] First Implementation Method

[0024] The following is combined Figure 1-3This invention introduces the structure of the air spring stiffness valve. Air spring stiffness valves are commonly used in automobile frames to adjust frame height, improving vehicle stability when encountering uneven roads or turning, thus enhancing the passenger experience. The air spring stiffness valve is a bidirectional medium flow valve, including a valve seat component, a connecting seat 30, an outer tube 40, a coil component 50, a sleeve 60, a moving core assembly 70, and a sealing plug 80. The valve seat component can be a separate structure or a single piece; this embodiment describes a separate structure. The valve seat component includes a valve seat 10 and a support seat 20, connected... Seat 30 and valve seat 10 are located on different sides of support seat 20. The moving core assembly 70 includes a moving core 71 and a valve stem 72. One end of the valve stem 72 is located in the moving core channel of the moving core 71 and can be fixedly connected to the moving core 71 by a tight fit or similar method. The other end of the valve stem 72, away from the moving core 71, passes through the connecting seat channel of the connecting seat 30 and can be fixedly connected to the sealing plug 80 by a tight fit or similar method. The sleeve 60, with its upper closed shape, is sleeved on the outer periphery of the moving core 71 and part of the connecting seat 30. The connecting seat 30 can be an integral structure or a split structure. This invention provides an embodiment... The connecting seat 30 is described as a split structure, including a head 30A and a fixing seat 30B. The head 30A has a third step 35, a fourth step 36, and an abutting step. The fourth step is located between the third step 35 and the abutting step. The abutting step abuts against the upper end face 34 of the fixing seat 30B and can be fixedly connected by welding or other methods. By splitting the connecting seat 30, processing materials can be saved and machining can be facilitated. The lower end of the sleeve 60 abuts against the third step 35 and can be fixedly connected by welding or other methods to prevent gas leakage. Coil component 5 The outer periphery of the sleeve 60 is covered by the coil component 50, which includes a skeleton 51 and a coil 52 wound and installed on the skeleton 51. The skeleton step portion of the skeleton 51 abuts against the fourth step portion 36. The skeleton 51 also includes a skeleton flange portion, which abuts against the upper end face of the fixed seat 30B. An elastic element 120 is provided between the moving core 71 and the end cap 30A. A buffer element 110 is provided between the sealing plug 80 and the end cap 30A to buffer the impact force between the sealing plug 80 and the end cap 30A when the valve is opened. Depending on the switching state of the coil component, the moving core 71 can approach or move away from the end cap 30A.

[0025] The outer tube 40 has an inner wall 42, including a deformable portion 41 and an outer tube stepped portion 43. The outer tube 40 is cylindrical in shape and is fitted around the outer periphery of the coil component 50, the fixing seat 30B, the support seat 20, and part of the valve seat 10. The valve seat 10 has a valve port portion 11 with a valve port 111. The sealing plug 80 includes a sealing portion 81, which can abut against or move away from the valve port portion 11 to close or open the valve port 111. The connecting seat 30 and the valve seat 10 are located on the support... On different sides of the support 20, the valve seat 10 includes a riveting part 13 with a rounded corner. The deformable part 41 abuts against the riveting part 13 by riveting deformation, so that the upper surface 211 of the support 20 abuts against the lower end face of the fixed seat 30B, the lower surface 212 of the support 20 abuts against the valve seat 10, the upper end face 34 of the fixed seat 30B on the side opposite to the lower end face 31 abuts against the frame flange, and the outer tube step part 43 abuts against the upper end face 34 of the fixed seat 30B.

[0026] The air spring stiffness valve also includes a sealing assembly 90 and a sealing ring 100. The sealing plug 80 has a receiving groove 83, which is recessed inward from the outer surface 82 of the sealing plug 80. The sealing assembly 90 is at least partially confined within the receiving groove 83. The sealing assembly 90 includes a base 91 and a sealing element 92 at least partially confined within the base 91. The receiving groove 83 has an upper wall 831, a lower wall 832, and a bottom wall 833. One side of the base 91 abuts against the upper wall 831, and the other side abuts against the lower wall 832. 2. The sealing element 92 abuts against the bottom wall 833. The support seat 20 has an inner edge 20'. The outer side of the base 91 and the inner edge 20' always maintain a dynamic sealing fit. Specifically, the base 91 can be made of plastic, and the sealing element 92 can be an O-ring. The outer side of the base 91 always maintains a hard sealing fit with the inner edge 20'. In order to maintain a hard sealing fit between the outer side of the base and the inner edge, the height of the inner edge is set to be greater than the receiving groove along the axial direction of the sealing plug. The sealing element 92 and the bottom wall 833 maintain a soft seal fit. With the above structure, regardless of whether the valve port of the air spring stiffness valve is open, closed, or in the middle operating state, the base of the sealing component always maintains a dynamic seal fit with the inner edge of the valve seat assembly. It is less affected by external pressure, which relatively improves the reliability of the sealing fit between the valve seat component and the sealing plug. A gap S is also formed between the inner edge 20' and the outer surface 82 of the sealing plug 80. When the air spring stiffness valve is in the closed state, the sealing part 81 abuts against the valve port 11 of the valve seat 10. When gas pressure enters the receiving groove 83 through the gap S, it applies a force to the O-ring 92. Due to the plastic base 91 and the presence of the receiving groove, the O-ring 92 will not undergo excessive deformation, that is, the deformation is limited. The deformation of the O-ring is transmitted to the support 20. The dynamic friction between the O-ring and the inner edge 20' of the support 20 can always be kept stable within a controllable range, thereby maintaining a reliable seal between the sealing component 90 and the sealing plug 80.

[0027] The support 20 includes a flange 23 that protrudes upward from the upper surface 211. The fixing seat 30B has a groove 32 recessed from the lower end face 31 of the fixing seat 30B. The flange 23 is located in the groove 32 and can be fixedly connected to the fixing seat 30B by at least partially fitting or bonding with the groove wall. The upper surface 211 abuts against the lower end face 31, and the lower surface 212 abuts against the valve seat 10. With the above arrangement, since the position of the connecting seat 30 is relatively fixed, the connection between the support 20 and the fixing seat 30B allows for better positioning of the support 20. (Sealing assembly 9) The 0-an limit switch is installed on the sealing plug 80, thereby positioning the sealing assembly 90 and ensuring the coaxiality between the dynamic sealing assembly 90 and each component. It should be noted that the flange structure of the above positioning method can also be interchanged. For example, the flange is set on the fixed seat of the connecting seat, and the groove is set on the support seat, which can also achieve the relevant technical effect. Alternatively, the connecting seat is provided with a first flange, the support seat is provided with a first groove corresponding to the first flange, and the support is provided with a second flange, and the connecting seat is provided with a second groove corresponding to the second flange, which can also achieve the relevant technical effect.

[0028] The support 20 also includes a conical portion 214. The fixed seat 30B, the conical portion 214, and the outer tube 40 generally enclose a triangular receiving cavity. The sealing ring 100 is located in the receiving cavity, and the sealing ring 100 abuts against the inner wall 213 of the fixed seat, the conical portion, and the outer tube to prevent gas leakage. Through the structural arrangement of the sealing assembly 90 and the sealing ring 100, the airtightness of the air spring stiffness valve can be ensured simultaneously, greatly reducing the risk of internal and external gas leakage. Furthermore, the conical portion 214 includes a small diameter portion 2141 and a large diameter portion 2142. The small diameter portion 2141 is closer to the fixed seat 30B of the connecting seat than the large diameter portion 2142. The cross-sectional area of ​​the large diameter portion 2142 is larger than that of the small diameter portion 2141. The support 20 also includes an extension portion 215, which protrudes outward circumferentially from the side of the large diameter portion 2142, and the extension portion 215 is adjacent to the outer tube 40. The inner wall 213 abuts against each other. Through the above design, the support seat 20 is provided with an extension 215. The extension 215 abuts against the inner wall 213 of the outer tube 40, and the upper surface 211 abuts against the lower end face 31, and the lower surface 212 abuts against the valve seat 10. This can relatively ensure the positioning of the support seat, thereby achieving better cooperation with the sealing component 90. This ensures the coaxiality between the sealing component 90 and the valve seat component and the sealing plug 80, guaranteeing the sealing reliability between them. It should be noted that in achieving the coaxiality effect, the support seat 20 can be positioned between the flange structure and the fixed seat 30B, or it can be positioned between the outer tube 40 by adding an extension structure; or it can be positioned between the flange structure and the fixed seat 30B, while adding an extension structure to achieve the abutment cooperation with the outer tube 40, thus achieving a double guarantee of the support seat positioning structure.

[0029] Valve seat 10 has a first end face 14 and a second end face 15, wherein the height of the second end face 15 is higher than that of the first end face 14. A valve seat step is formed between the first end face 14 and the second end face 15. The valve seat includes a guide portion 12 corresponding to the valve seat step. A riveting portion 13 is located below the guide portion 12. The guide portion 12 guides and cooperates with the straight section of the outer tube 40. The deformable portion 41 abuts against the riveting portion 13 through riveting deformation. The lower surface 212 of the support seat 20 abuts against the second end face 15. The first step portion 24 is clearance-fitted with the first end face 14. The second step portion 25 is at least partially located in the valve seat channel of the valve seat 10. The addition of a guide portion 12 to the seat 10 can better achieve the cooperation with the outer tube 40, thereby relatively ensuring the coaxiality of the valve seat 10, the support seat 20 and the valve plug 80, and ensuring the reliability of valve operation. If the second end face 15 is set to the same height as the first end face 14, the guide portion 12 will no longer exist. There will be no part to achieve the guiding cooperation with the straight section of the outer tube, which will affect the coaxiality installation of related components. If the first end face 14 is raised to the same height as the second end face 15, the first step of the support portion 20 will no longer exist. The connecting wall between the second step and the body of the support portion is too thin and is prone to breakage.

[0030] The following reference Figure 4 Combination Figure 1-3 As shown, an automotive system with an air spring stiffness valve is introduced. The automotive system includes an air spring, which includes an air spring stiffness valve and a mounting cavity. Taking the application of the air spring stiffness valve in a dual-cavity mounting cavity as an example, the mounting cavity includes a main cavity 200 and a secondary cavity 300. The air spring stiffness valve is installed between the main cavity 200 and the secondary cavity 300. The valve port 11 of the air spring stiffness valve, i.e., the vertical port, corresponds to the main cavity 200, and the horizontal port of the air spring stiffness valve corresponds to the secondary cavity 300. The cavity wall of the main cavity 300 is sealed by a compressible bladder. The cavity wall of the secondary cavity 300 includes a rigid structure. The cavity wall of the secondary cavity 300 has a first mating hole 320 and a second mating hole 330. The air spring stiffness valve also includes a fourth seal 400 and a fifth seal 500, wherein the fourth seal is installed on the valve seat 1. 0. The fourth sealing element 400 is sealed to the wall of the first mating hole 320. The fifth sealing element 500 is installed on the upper part of the air spring stiffness valve and is sealed to the wall of the second mating hole 300. When the air spring stiffness valve is de-energized and not working, the valve port 11 is open, and the main chamber 200 and the secondary chamber 300 are connected. At this time, the volume of air that can be compressed in the stiffness valve is the largest. The compressible gas is defined as V1, then V1 = V main + V secondary, and the stiffness valve K value is the smallest, that is, the air spring is the softest. When the air spring stiffness valve is energized and working, the sealing plug 80 abuts against the valve port 11, and the main chamber and the secondary chamber are not connected. At this time, the volume of air that can be compressed in the air spring is the smallest. The compressible gas is defined as V2, then V2 = V main, the stiffness valve K value is the largest, and the air spring is the stiffest.

[0031] Second Implementation Method

[0032] The following is for reference. Figure 4 Combined with appendix Figure 1-3 The second embodiment of the present invention is described below. The valve seat component 10A of this embodiment is an integral structure, allowing the support base and valve seat to be molded into a single unit. The valve seat component 10A includes an inner edge portion 11A. The sealing assembly maintains a dynamic sealing fit with the inner edge portion 11A. Furthermore, to achieve better positioning of the sealing assembly, the sealing plug can be separately configured, including a first body portion 80A and a second body portion 80B. The first body portion 80A and the second body portion 80B can be fixedly connected by tight fitting and welding. The lower wall 81A of the first body portion 80A, the upper wall 81B of the second body portion 80B, and the outer wall 82B are... The sealing assembly is limited to forming a receiving groove, and at least part of the sealing assembly is located in the receiving groove. It should be noted that the general meaning of the limitation here is that the receiving groove can be formed by the first body part and the second body part, or it can be formed by the participation of third-party components. However, it is basically formed by the participation of the first body part and the second body part. One side of the base of the sealing assembly abuts against the lower wall 81A and the other side abuts against the upper wall 81B. The outer side of the base and the inner edge 11A always maintain a hard seal fit, which can also achieve the technical effect of this application. The relevant operating principle and technical effect have been described in detail in the first embodiment, and will not be repeated here.

[0033] This invention provides a spring stiffness valve, including a valve seat component, a connecting seat, a moving core, a valve stem, a sealing plug, and a sealing assembly. The valve seat component is either separately arranged or integrated. The valve seat component has a valve port and an inner edge. The moving core can approach or move away from the connecting seat. One end of the valve stem is connected to the moving core, and the other end of the valve stem is connected to the sealing plug. The sealing plug can abut or move away from the valve port.

[0034] The sealing plug has a receiving groove recessed on the outer surface of the sealing plug, and the sealing assembly is at least partially located in the receiving groove. The sealing assembly includes a base and a sealing element at least partially located in the base. The sealing element is in sealing engagement with the sealing plug. The sealing plug is axially movable relative to the valve seat component, and the base always maintains a dynamic sealing engagement with the inner edge.

[0035] The present invention provides a spring stiffness valve, which improves the mechanism of the sealing assembly by providing a receiving groove for the sealing plug. The sealing assembly is at least partially located in the receiving groove. The sealing assembly includes a base and a sealing element at least partially located in the base. The sealing element and the sealing plug are in a sealing fit. The sealing plug can move axially relative to the valve seat component, and the base always maintains a dynamic sealing fit with the inner edge. Regardless of whether the valve port of the spring stiffness valve is open, closed, or in an intermediate operating state, the base of the sealing assembly always maintains a dynamic sealing fit with the inner edge of the valve seat component, which is less affected by external pressure and relatively improves the reliability of the sealing fit between the valve seat component and the sealing plug.

[0036] This invention provides an automotive system including an air spring. The air spring includes an air spring stiffness valve and a mounting cavity. The mounting cavity has a main cavity and a secondary cavity. The air spring stiffness valve has a valve port. When the air spring stiffness valve is de-energized, the valve port is open, and the main cavity and the secondary cavity are connected. When the air spring stiffness valve is energized, the valve port is closed, and the main cavity and the secondary cavity are not connected. The cavity wall of the secondary cavity has a first mating hole and a second mating hole. The air spring stiffness valve has a fourth sealing element and a fifth sealing element. The fourth sealing element is sealed with the first mating hole, and the fifth sealing element is sealed with the second mating hole. The air spring stiffness valve has the above-described air spring stiffness valve structure.

[0037] The present invention provides an automotive system including a spring stiffness valve with the above-described structure. Regardless of whether the valve port of the spring stiffness valve is open, closed, or in an intermediate operating state, the base of the sealing component always maintains a dynamic sealing fit with the inner edge of the valve seat component, which is less affected by external pressure and relatively improves the reliability of the sealing fit between the valve seat component and the sealing plug.

Claims

1. A spring stiffness valve, characterized in that, The valve includes a valve seat component, a connecting seat, a moving core, a valve stem, a sealing plug, and a sealing assembly. The valve seat component is either separately configured or integrated. The valve seat component has a valve port and an inner edge. The moving core can approach or move away from the connecting seat. One end of the valve stem is connected to the moving core, and the other end of the valve stem is connected to the sealing plug. The sealing plug can abut or move away from the valve port. The sealing plug has a receiving groove recessed from the outer surface of the sealing plug, the sealing assembly is at least partially located in the receiving groove, the sealing assembly includes a base and a sealing element at least partially located in the base, the sealing element is in sealing engagement with the sealing plug, the sealing plug is axially movable relative to the valve seat component and the base always maintains a dynamic sealing engagement with the inner edge.

2. The air spring stiffness valve according to claim 1, characterized in that, The base is made of plastic, and the sealing element is an O-ring. The O-ring is at least partially located on the base. The outer part of the base is in hard sealing fit with the inner edge. The O-ring is in soft sealing fit with the sealing plug. A gap S is formed between the inner edge and the outer surface of the sealing plug.

3. The air spring stiffness valve according to claim 2, characterized in that, The receiving groove includes an upper wall, a lower wall, and a bottom wall. One side of the base abuts against the upper wall, the other side of the base abuts against the lower wall, and the O-ring abuts against the bottom wall.

4. The air spring stiffness valve according to claim 1, characterized in that, The sealing plug is either a separate structure or an integral structure. The sealing plug includes a first body part and a second body part fixedly connected to the first body part. The lower wall of the first body part, the upper wall of the second body part, and the outer wall generally define the receiving groove.

5. The air spring stiffness valve according to claim 1, characterized in that, It also includes an outer tube and a sealing ring. The valve seat component is separately configured, including a valve seat and a support seat. The outer tube is riveted to the valve seat. The connecting seat and the valve seat are located on different sides of the support seat. The upper surface of the support seat abuts against the connecting seat, and the lower surface of the support seat abuts against the valve seat. The support seat includes a conical part. The sealing ring abuts against the connecting seat, the outer tube, and the conical part.

6. The air spring stiffness valve according to claim 5, characterized in that, The conical section includes a small diameter section and a large diameter section. The small diameter section is closer to the connecting seat than the large diameter section. The support seat also includes an extension section that protrudes outward circumferentially from one side of the large diameter section and abuts against the inner wall of the outer tube.

7. The air spring stiffness valve according to claim 5, characterized in that, The connecting seat has a groove recessed from the lower end face of the connecting seat, the support seat has a flange protruding from the upper surface of the support seat, and / or the connecting seat has a flange, the support seat has a groove, the flange is located in the groove and is at least partially fixedly connected to the groove wall, the upper surface of the support seat abuts against the lower end face of the connecting seat, the support seat includes a lower surface, and the lower surface abuts against the valve seat.

8. The air spring stiffness valve according to claim 1, characterized in that, The valve seat component, including an outer tube, is a split structure comprising a valve seat and a support base. The connecting base and the valve seat are located on different sides of the support base. The valve seat includes a first end face and a second end face, with the second end face being higher than the first end face. A valve seat step portion is formed between the second end face and the first end face. The valve seat includes a guide portion corresponding to the valve seat step portion and a riveting portion located below the guide portion. The outer tube includes a straight section and a deformable section. The straight section guides and cooperates with the guide portion, and the deformable section is riveted and deformed to abut against the riveting portion.

9. The air spring stiffness valve according to claim 8, characterized in that, The support seat has a lower surface and further includes a first step portion and a second step portion. The first step portion protrudes from the lower surface, and the second step portion protrudes from the first step portion. The lower surface abuts against the second end face. The first step portion and the first end face are in clearance fit. The second step portion is at least partially located in the valve seat passage of the valve seat.

10. The air spring stiffness valve according to any one of claims 1-9, characterized in that, Along the axial direction of the sealing plug, the height of the inner edge is greater than the height of the mounting groove.

11. A vehicle system comprising an air spring, the air spring including an air spring stiffness valve and a mounting cavity, the mounting cavity having a main cavity and a secondary cavity, the air spring stiffness valve having a valve port, wherein when the air spring stiffness valve is de-energized, the valve port is open, and the main cavity and the secondary cavity are connected; when the air spring stiffness valve is energized, the valve port is closed, and the main cavity and the secondary cavity are not connected, the cavity wall of the secondary cavity having a first mating hole and a second mating hole, the air spring stiffness valve having a fourth sealing element and a fifth sealing element, the fourth sealing element sealingly engaging with the first mating hole, and the fifth sealing element sealingly engaging with the second mating hole, wherein the air spring stiffness valve is the air spring stiffness valve structure according to any one of claims 1-9.

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