Air spring stiffness valve and vehicle system thereof

Abstract

According to the air spring rigidity valve and the vehicle system thereof, the design of the air spring rigidity valve structure is improved, the buffering piece is provided with the body part and the abutting parts, the notch is formed between every two adjacent abutting parts, and when the air spring rigidity valve is fully opened, the abutting parts can elastically deform so as to abut against the end face of the sealing plug and / or the end socket part to achieve buffering; on the basis, the cavity on one side of the buffering piece can be communicated with the cavity on the other side of the buffering piece through the notch, it can be relatively guaranteed that stress on the two sides of the sealing plug is relatively balanced, and during electrification, the sealing plug can close the valve port part through small electromagnetic force driving.

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 automobile frames to adjust the frame height, improving vehicle stability when encountering uneven roads or turning. 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. The moving core assembly includes a spindle and a moving core fixedly connected to the spindle. An O-ring is fitted on the spindle for cushioning. In the de-energized state, the moving core moves upward, and the O-ring abuts against the head. The O-ring isolates the inside and outside of the two chambers, preventing gas flow and potentially causing uneven force distribution on both sides of the sealing block component. When switched to energized mode, the moving core needs to move downward to engage with the head. Because the lower side of the sealing block component experiences a greater vertical force, a larger electromagnetic force is required to close the valve. [Summary of the Invention]

[0003] The purpose of this invention is to provide a spring stiffness valve and its automotive system, which can achieve buffering while ensuring that the forces on both sides of the sealing plug are relatively balanced in the open state, and can drive the valve to close with relatively small electromagnetic force when energized.

[0004] This invention provides a spring stiffness valve, comprising a valve seat, a moving core assembly, a head assembly, a sealing plug, and a buffer. The valve seat has a valve port. The moving core assembly includes a moving core and a spindle. One end of the spindle is fixedly connected to the moving core, and the other end is connected to the sealing plug. The sealing plug can abut against or move away from the valve port.

[0005] One of the sealing plug and the end cap component is provided with a groove portion. The buffer component includes a body portion and an abutment portion protruding from the body portion. A notch is provided between two adjacent abutment portions. The body portion is at least partially confined within the groove portion and is tightly fitted to the groove portion.

[0006] When fully open, the sealing plug is away from the valve port, and the abutment part can elastically deform and abut against the end face of either the sealing plug or the end cap component. The cavity on one side of the buffer and the cavity on the other side of the buffer are connected through the notch. This invention improves the design of the air spring stiffness valve structure so that the buffer has a body part and an abutment part, and there is a notch between two adjacent abutment parts. When fully open, the abutment part can elastically deform to abut against the end face of the sealing plug or the end cap component to achieve buffering. On this basis, since the cavity on one side of the buffer and the cavity on the other side can be connected through the notch, the force on the upper part of the sealing plug is balanced with the force on the lower part of the valve port, which can relatively ensure the relative balance of the forces on both sides of the sealing plug. When energized, the sealing plug can close the valve port by using a small electromagnetic force.

[0007] The present invention also provides a spring stiffness valve, including a valve seat, a moving core assembly, a head component, a sealing plug, a first buffer component and a second buffer component. The valve seat is provided with a valve port. The moving core assembly includes a moving core and a spindle. One end of the spindle is fixedly connected to the moving core, and the other end is connected to the sealing plug. The sealing plug can abut against or move away from the valve port.

[0008] The sealing plug has a first groove, the end cap has a second groove, the first buffer and the second buffer each include a body and a protruding abutment, a notch is provided between two adjacent abutments, the body of the first buffer is at least partially confined within the first groove and tightly fitted with the first groove, and the body of the second buffer is at least partially confined within the second groove and tightly fitted with the second groove.

[0009] When fully open, the sealing plug is away from the valve port. The abutment portion of the first buffer member can elastically deform and abut against the lower end face of the end cap component. The abutment portion of the second buffer member can elastically deform and abut against the upper end face of the sealing plug. A transition cavity is formed between the first buffer member and the second buffer member. One side cavity of the first buffer member is connected to the transition cavity through a notch in the first buffer member. The other side cavity of the second buffer member is connected to the transition cavity through a notch in the second buffer member. This invention, through an improved design of the air spring stiffness valve, provides a first groove portion for the sealing plug and a second groove portion for the end cap component. Both the first and second buffer members include this... The body and the abutment part are provided with a notch between two adjacent abutment parts. When fully open, the abutment part of the first buffer member can elastically deform and abut against the lower end face of the end cap part, and the abutment part of the second buffer member can elastically deform and abut against the upper end face of the sealing plug to achieve buffering. A transition cavity is formed between the first buffer member and the second buffer member. The cavity on one side of the first buffer member is connected to the transition cavity through the notch of the first buffer member, and the cavity on one side of the second buffer member is connected to the transition cavity through the notch of the second buffer member. At this time, the force on the upper part of the sealing plug is balanced with the force on the lower part of the valve port, which can relatively ensure the relative balance of the forces on both sides of the sealing plug. When energized, the sealing plug can be closed at the valve port by using a small electromagnetic force.

[0010] This invention also 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.

[0011] This invention improves the design of the air spring stiffness valve structure and applies it to the air spring of an automotive system. The buffer has a body and abutment, with a notch between two adjacent abutment. When fully open, the abutment can elastically deform to abut against the end face of the sealing plug or end cap to achieve buffering. On this basis, the cavity on one side of the buffer can be connected to the cavity on the other side through the notch, which can relatively ensure the force on both sides of the sealing plug is relatively balanced. When energized, the sealing plug can be closed at the valve port by using a small electromagnetic force. [Attached Image Description]

[0012] Figure 1 A cross-sectional view of the overall structure of the first embodiment of the present invention with the air spring stiffness in the closed valve state;

[0013] Figure 2 A cross-sectional view of the overall structure of the air spring stiffness valve in the open state according to the first embodiment of the present invention;

[0014] Figure 3 A cross-sectional schematic diagram of the overall structure of the valve plug of the air spring stiffness valve according to the first embodiment of the present invention;

[0015] Figure 4 A cross-sectional schematic diagram of the overall structure of the first end cap of the end cap component of the air spring stiffness valve provided by the present invention;

[0016] Figure 5 A three-dimensional schematic diagram of the buffer component of the air spring stiffness valve provided by the present invention;

[0017] Figure 6 A cross-sectional schematic diagram of the buffer component of the air spring stiffness valve provided by the present invention;

[0018] Figure 7 A cross-sectional view of the overall structure of the air spring stiffness valve in the open state according to the second embodiment of the present invention.

[0019] Figure 8 A cross-sectional view of the overall structure of the air spring stiffness valve in the open state according to the third embodiment of the present invention.

[0020] Figure 9 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

[0022] Valve seat 10, valve port 11, first step 12, second step 13, magnetic conductor 20, coil assembly 30, frame 31, enameled wire 32, magnetic plate 40, sleeve 50, moving core assembly 60, moving core 61, spindle 62, end cap assembly 70, first end cap 71, first channel 711, spring seat hole 7111, vertical hole 7111a, flare hole 7111b, mating hole 7112, guide hole 7113, abutment part 712, extension wall 713, lower end face 714, second end cap 72, second channel 721, lower end face 722;

[0023] Sealing plug 80, small diameter hole 80a, large diameter hole 80b, first groove portion 81, upper end face 82, mating hole 83, through hole 84, buffer member 9, body portion 91, abutment portion 92, first sub-part 921, second sub-part 922, notch 90a, elastic member 100, dynamic sealing assembly 110, sealing body 110a, first sealing member 111, second sealing member 112, third sealing member 200, cavity A, cavity B; main cavity 200, secondary cavity 300, bladder skin 210, cavity wall 310, first mating hole portion 320, second mating hole portion 330, fourth sealing member 400, fifth sealing member 500

Detailed Implementation Methods

[0024] 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 structure of the buffer component and the connection relationship between the buffer component and the sealing plug and the end cap component. Through the corresponding design and improvement, the forces on both sides of the sealing plug can be relatively balanced. When energized, the sealing plug can be closed at the valve port by using a small electromagnetic force. The structures of other components such as the needle component, cover plate, and valve seat can be adapted to the usage environment or system requirements.

[0025] First Embodiment

[0026] The following is combined with Figure 1-6 This invention introduces a first embodiment of the air spring stiffness valve. Air spring stiffness valves are commonly used on automobile frames to adjust frame height. They improve vehicle stability when encountering uneven roads or turning, thus enhancing the passenger experience. The air spring stiffness valve allows bidirectional media flow and includes a valve seat 10, a magnetic conductor 20, a coil component 30, a magnetic plate, a pin component, a housing, and a sleeve 50. The valve seat 10 has a valve port 11. The coil component 30 is built into the magnetic conductor 20. One side of the magnetic conductor 20 is fixedly connected to the valve seat 10 by riveting, and the other side is tightly fitted to the housing. The coil component 30 includes a frame 31 and enameled wire 32 wound and installed on the frame 31. The magnetic plate 40 abuts against the frame 31. The frame 31 has a snap-fit ​​portion that limits the pin component. The housing and the pin component are fixed by heat fusion welding. The lower end of the pin component abuts against the magnetic plate 40. The frame 31 is sleeved on the outer periphery of the sleeve 50.

[0027] The air spring stiffness valve also includes a moving core assembly 60, a head assembly 70, a sealing plug 80, and a buffer component.

[0028] 9. An elastic element 100 and a dynamic sealing assembly 110, wherein the moving core assembly 60 includes a moving core 61 and a spindle 62, one end of the spindle 62 being tightly fitted with the moving core 61; the end cap assembly 70 includes a first end cap 71 and a second end cap 72 located on the outer periphery of the first end cap 71; the second end cap 72 includes a first lower end face 722, which abuts against the valve seat 10; the upper end face of the second end cap 72, facing away from the first lower end face 722, abuts against the lower end of the skeleton 31; the sleeve 50 is generally open at one end and closed at the other, with the opening of the sleeve 50 tightly fitted with the first end cap 71, specifically, for example, by interference fit and welding fixation, see reference. Figure 3 Combination Figure 1-2 As shown, the first end cap 71 includes an abutment portion 712, an extension wall 713, and a second lower end face 714. The abutment portion 712 abuts against the upper end face of the second end cap 72. The second end cap 72 is provided with a second channel 721. The channel wall of the second channel 721 is tightly fitted with the extension wall 713, specifically, for example, by interference fit and welding. The frame 31 abuts against the stepped portion of the first end cap 71. With the above arrangement, the end cap component 70 is integrally fixedly installed on the valve seat 10. The first end cap 71 is provided with a first channel 711. The first channel 711 includes a spring seat hole 7111, a mating hole 7112, and a guide hole 7113. The spring seat hole 7111 includes a vertical hole 7111a and a flared hole 7111b with approximately equal diameters. The flared hole 7111b is relatively far away from the valve seat 10. The cross-sectional area of ​​the vertical hole 7111a is larger than the cross-sectional area of ​​the flared hole 7111b relative to the side of the vertical hole 7111a. Part of the elastic element 100 is located in the spring seat hole 7111. The elastic element 100 is sleeved on the outer periphery of the spindle 62. The spindle 62 passes through the mating hole 7112. Similarly, the moving core 61 also has a spring seat hole for accommodating the elastic element 100, including the vertical hole and the flared hole. Part of the elastic element 100 is located in the spring seat hole of the moving core 61. The elastic element 100 is pre-compressed and abuts against the first end cap 71 and the moving core 61. The moving core 61 can approach or move away from the first end cap 71. Through the above-mentioned design of the spring seat hole, the friction on the wall of the spring seat hole caused by the repeated action of the elastic element under the power-on and power-off state can be reduced, thereby improving the service life of the parts.

[0029] The following reference Figure 4-6 Combination Figure 1 and Figure 2This section describes the structure of the sealing plug 80 and the buffer component 9, as well as their connection and fit with corresponding parts. The sealing plug 80 has a small-diameter hole 80a and a large-diameter hole 80b that are interconnected. The small-diameter hole 80a includes a mating hole 83 and a through hole 84. Both the mating hole 83 and the through hole 84 penetrate the upper and lower surfaces of the sealing plug 80. The through hole 84 is located on different sides of the mating hole 83. The other end of the mandrel 62 is tightly fitted with the wall of the mating hole 83, specifically using an interference fit. The small-diameter hole 80a... 0a, the large-diameter hole 80b, and the valve port passage of the valve port portion 11 are connected. The outer peripheral wall of the sealing plug 80 is slidably guided and engaged with the guide hole 7113. In this embodiment, the sealing plug 80 is also provided with a first groove portion 81 recessed from its upper end face 82 for cooperating with the buffer member 9. The buffer member 9 includes a generally annular body portion 91 and an abutting portion 92 protruding from the end face 911 of the body portion. The abutting portion 92 is generally serrated. Several abutting portions 92 can be provided along the circumference of the body portion 91. In this embodiment, four abutment portions 92 are evenly arranged along the circumference of the body portion 91 for illustration. It should be noted that the number of abutment portions and the adjacent spacing are optional. The abutment portions 92 can elastically deform and include a first sub-part 921 and a second sub-part 922. A notch 90a is formed between two adjacent abutment portions 92. The first sub-part 921 is closer to the body portion 91 than the second sub-part 922. In order to facilitate elastic deformation, the thickness of the first sub-part 921 is greater than the thickness of the second sub-part 922, and the wall thickness gradually decreases from the first sub-part 921 to the second sub-part 922. Furthermore, in order to achieve reliable elastic deformation and buffering effect between the sealing plug and the first end cap in the power-off state, the abutment portions 92 converge toward the axis of the buffer member 9. The body portion 91 is at least partially confined within the first groove portion 81 and tightly fitted with the wall of the first groove portion to prevent the buffer member 9 from disengaging from the first groove portion during the axial movement of the sealing plug 80.

[0030] The air spring stiffness valve also includes a dynamic sealing assembly 110 and a third seal 200. The dynamic sealing assembly 110 includes a sealing body 110a, a first seal 111, and a second seal 112. The first and second seals can be O-rings. The first seal 111 is embedded in a side wall groove of the sealing body 110a. The sealing body 110a abuts against the first step portion 12 of the valve seat 10. The second seal 112 abuts against the second end cap 72 and the sealing body 110a, respectively. 2. The second step portion 13 of the valve seat 10 forms a receiving groove. The third seal 200 is at least partially located in the receiving groove and abuts against the magnetic conductor 20, the second end cap 72 and the valve seat 10 respectively. The dynamic sealing assembly 110 is fixed on the valve seat 10. The sealing plug 80 can move axially up and down relative to the dynamic sealing assembly 110. The outer peripheral wall of the sealing plug 80 abuts against the first seal 111. The lower part of the sealing plug 80 is provided with a flexible sealing part. Through the above design, the leakage of the medium to the outside is relatively prevented.

[0031] The operating principle of the air spring stiffness valve is described below. Under the energized state, under the influence of the excitation, the spindle 62 drives the moving core 61 to move towards the first end cap 71. The moving core and the first end cap 71 are attracted together, and the elastic element 100 is further compressed. At this time, the flexible sealing part of the sealing plug 80 abuts against the valve port 11, and the abutting part 92 of the buffer element 9 is in a natural state without elastic deformation. When switching to the de-energized state, the excitation effect is relatively reduced. Under the restoring force of the elastic element 100, the spindle 62 drives the moving core 61 to move away from the first end cap 71, and the sealing plug 80 also moves axially upward. At this time, the abutting part 92 abuts against the first lower end face 722 of the second end cap 72 and undergoes elastic deformation. The abutting part 92 gathers towards the axial direction of the buffer element 9 to achieve buffering between the second end cap and the sealing plug, absorb impact force, and reduce noise. In the fully open state, let A be the cavity on one side of the buffer 9 and B be the cavity on the other side of the buffer 9. Cavity B is closer to the spindle 62 than cavity A. Cavities A and B can be connected through the notch 90a. At this time, cavities A, B, the through hole 84, the guide hole 7113, and the valve port passage of the valve port 11 are connected. The vertical pressure from the valve port passage of the valve port 11 can be applied to the position above the sealing plug 80 through the through hole 84, thereby maintaining the relative balance of forces on the upper and lower sides of the sealing plug 80. When it is necessary to switch to the closed valve state, because the upper and lower sides of the sealing plug 80 are relatively balanced... This design allows for valve closure with relatively small electromagnetic driving force. Furthermore, because cavities A and B are interconnected, it overcomes the limitations of the previous O-ring scheme where, when switching from the energized closed state to the de-energized state, the cavity furthest from the spindle was separated by the O-ring to form a relatively closed cavity, and the pressure within the closed cavity could still be relatively high. This high pressure within the closed cavity could pose a risk of media leakage. Through the above improvements and design, because cavities A and B are interconnected, the sealing plug 80 experiences balanced forces when the valve is open, greatly reducing the possibility of media leakage.

[0032] It should be noted that in the fully open state, the elastic restoring force of the elastic element 100 and the elastic deformation force of the abutment part of the buffer element 9 are equal.

[0033] The following reference Figure 9 Combination Figure 1-2This paper introduces an automotive system with an air spring stiffness valve. The system includes an air spring, which in turn 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 (vertical port) of the air spring stiffness valve corresponds to the main cavity 200, and the horizontal port 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 10. 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.

[0034] Second Embodiment

[0035] The second embodiment differs from the first embodiment in that the location of the groove and the arrangement of the buffer 9 are improved. This embodiment refers to... Figure 7 Combination Figure 1-2 As shown, the first end cap 71' is provided with a second groove 711', which is recessed inward from the lower end face 712' of the first end cap 71'. The sealing plug 80' has a complete upper end face 81' compared to the sealing plug 80 in the first embodiment. The generally annular body portion 91 of the buffer member 9 is at least partially confined in the second groove 711' and tightly fitted with the groove wall portion of the second groove 711' to prevent the buffer member 9 from falling out of the first end cap 71'. The abutment portion 92 is generally serrated and is provided towards the upper end face 81'. In the same valve-open state, the abutment portion 92 abuts against the upper end face 81' and undergoes elastic deformation. The cavity A on one side of the buffer member 9 and the cavity B on the other side of the buffer member 9 are connected through the notch 90a. The specific structure of the buffer member and the positional relationship between other components, as well as the valve opening and closing operation mode, have been specifically described in the first embodiment and will not be repeated here.

[0036] Third Embodiment

[0037] The third embodiment of the present invention is described below, with reference to... Figure 8 Combination Figure 1-2 As shown, in this embodiment, the air spring stiffness valve is provided with a first buffer 90a and a second buffer 90b. The sealing plug 80 is provided with a first groove 81 recessed downward from its upper end face 82, and the first end cap 71' is provided with a second groove 711' recessed inward from its lower end face 712'. The body of the first buffer 90a is at least partially confined within the first groove 81 and tightly fitted with the groove wall to prevent the first buffer 90a from detaching from the sealing plug. The body of the second buffer 90b is at least partially confined within the second groove 81 and tightly fitted with the groove wall to prevent the second buffer 90b from detaching from the first end cap 71'. In the fully open state under power-off conditions, the abutting part of the first buffer 90a abuts against the lower end face 712' and undergoes elastic deformation, and the abutting part of the second buffer 90b abuts against the upper end face 82 and undergoes elastic deformation, thereby absorbing the noise generated by the collision between the first end cap and the sealing plug to achieve buffering. In the impact action, under this state, a transition cavity 300 is formed between the first buffer 90a and the second buffer 90b. The cavity located on the side of the first buffer 90a is A', and the cavity located on the side of the second buffer 90b is B'. Cavity B' is closer to the spindle 62 than cavity A'. Cavity A' is connected to the transition cavity 300 through the notch of the first buffer 90a, and cavity B' is connected to the transition cavity 300 through the notch of the second buffer 90b. Cavity A', transition cavity 300, cavity B', through hole 84, guide hole, and valve port passage of valve port are connected. The upper and lower sides of the sealing plug 80 are relatively balanced by forces, which can also realize the technical solution of the present invention. For the structure of the sealing plug, the first end cap, the first buffer, the second buffer, and the cooperation relationship between them, as well as the valve actuation state, please refer to the detailed description in the first embodiment, which will not be repeated here.

[0038] This invention provides a spring stiffness valve, including a valve seat, a moving core assembly, a head component, a sealing plug, and a buffer component. The valve seat has a valve port. The moving core assembly includes a moving core and a spindle. One end of the spindle is fixedly connected to the moving core, and the other end is connected to the sealing plug. The sealing plug can abut against or move away from the valve port.

[0039] One of the sealing plug and the end cap component is provided with a groove, and the buffer includes a body and abutment protruding from the body. A notch is provided between two adjacent abutment, and the body is at least partially confined within the groove and tightly fitted to the groove.

[0040] When fully open, the sealing plug is away from the valve port, and the abutment part can elastically deform and abut against the end face of either the sealing plug or the end cap component. The cavity on one side of the buffer and the cavity on the other side of the buffer are connected through a notch. This invention improves the design of the air spring stiffness valve structure so that the buffer has a body part and an abutment part, and there is a notch between two adjacent abutment parts. When fully open, the abutment part can elastically deform to abut against the end face of the sealing plug or the end cap component to achieve buffering. On this basis, the cavity on one side of the buffer and the cavity on the other side can be connected through the notch, which can relatively ensure the relative balance of forces on both sides of the sealing plug. When energized, the sealing plug can close the valve port with a small electromagnetic force.

[0041] The present invention also provides a spring stiffness valve, including a valve seat, a moving core assembly, a head component, a sealing plug, a first buffer component and a second buffer component. The valve seat is provided with a valve port. The moving core assembly includes a moving core and a spindle. One end of the spindle is fixedly connected to the moving core, and the other end is connected to the sealing plug. The sealing plug can abut against or move away from the valve port.

[0042] The sealing plug has a first groove, the end cap has a second groove, the first buffer and the second buffer both include a body and a contact portion protruding from the body, a notch is provided between two adjacent contact portions, the body of the first buffer is at least partially confined in the first groove and tightly fitted with the first groove, and the body of the second buffer is at least partially confined in the second groove and tightly fitted with the second groove.

[0043] When fully open, the sealing plug is away from the valve port. The abutment portion of the first buffer member can elastically deform and abut against the lower end face of the end cap component. The abutment portion of the second buffer member can elastically deform and abut against the upper end face of the sealing plug. A transition cavity is formed between the first and second buffer members. The cavity on one side of the first buffer member is connected to the transition cavity through a notch in the first buffer member, and the cavity on one side of the second buffer member is connected to the transition cavity through a notch in the second buffer member. This invention, through an improved design of the air spring stiffness valve, provides a first groove portion for the sealing plug and a second groove portion for the end cap component. Both the first and second buffer members include a body portion. The first buffer member has an abutment part, and a notch is provided between two adjacent abutment parts. When fully open, the abutment part of the first buffer member can elastically deform and abut against the lower end face of the end cap component, and the abutment part of the second buffer member can elastically deform and abut against the upper end face of the sealing plug to achieve buffering. A transition cavity is formed between the first buffer member and the second buffer member. The cavity on one side of the first buffer member is connected to the transition cavity through the notch of the first buffer member, and the cavity on one side of the second buffer member is connected to the transition cavity through the notch of the second buffer member. This can relatively ensure that the forces on both sides of the sealing plug are relatively balanced. When energized, the sealing plug can be closed at the valve port by using a small electromagnetic force.

[0044] This invention also 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, and 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.

[0045] This invention improves the design of the air spring stiffness valve structure and applies it to the air spring of an automotive system. The buffer has a body and abutment, with a notch between two adjacent abutment. When fully open, the abutment can elastically deform to abut against the end face of the sealing plug or end cap to achieve buffering. On this basis, the cavity on one side of the buffer can be connected to the cavity on the other side through the notch, which can relatively ensure the force on both sides of the sealing plug is relatively balanced. When energized, the sealing plug can be closed at the valve port by using a small electromagnetic force.

Claims

1. A spring stiffness valve, characterized in that, The device includes a valve seat, a moving core assembly, a head assembly, a sealing plug, and a buffer component. The valve seat has a valve port. The moving core assembly includes a moving core and a spindle. One end of the spindle is fixedly connected to the moving core, and the other end is connected to the sealing plug. The sealing plug can abut against or move away from the valve port. One of the sealing plug and the end cap component is provided with a groove portion. The buffer component includes a body portion and an abutment portion protruding from the body portion. A notch is provided between two adjacent abutment portions. The body portion is at least partially confined within the groove portion and is tightly fitted to the groove portion. When fully open, the sealing plug is away from the valve port, the abutment portion can elastically deform and abut against the end face of either the sealing plug or the end cap component, and the cavity on one side of the buffer and the cavity on the other side of the buffer are connected through the notch.

2. The air spring stiffness valve according to claim 1, characterized in that, The sealing plug has a first groove portion, which is recessed inward from the upper end face of the sealing plug. The body portion is at least partially confined within the first groove portion and is tightly fitted to the first groove portion. The end cap component has a lower end face, and the abutment portion can elastically deform and abut against the lower end face.

3. The air spring stiffness valve according to claim 1, characterized in that, The end cap component is provided with a second groove portion, which is recessed inward from the lower end surface of the end cap component. The body portion is at least partially confined within the second groove portion and is tightly fitted with the second groove portion. The sealing plug is provided with an upper end surface, and the abutment portion is capable of elastic deformation and abuts against the upper end surface.

4. The air spring stiffness valve according to claim 3, characterized in that, The end cap component includes a first end cap and a second end cap. The second end cap is located on the outer periphery of the first end cap and is fixedly connected to the first end cap. The first end cap has a second groove and a first channel, including a stop portion and an extension wall. The first channel includes a guide hole, and the sealing plug is slidably engaged with the wall of the guide hole. The second end cap has a second channel, and the wall of the second channel is tightly engaged with the extension wall. The stop portion abuts against the upper end face of the second end cap.

5. The air spring stiffness valve according to claim 4, characterized in that, It also includes an elastic element, which is sleeved on the outer periphery of the mandrel. The first channel also includes a spring seat hole and a mating hole. The elastic element is partially located in the spring seat hole, and the mandrel passes through the mating hole.

6. The air spring stiffness valve according to any one of claims 1-5, characterized in that, The main body includes an annular body, and the abutting portion protrudes from the surface of the annular body. The abutting portion includes a first sub-part and a second sub-part. The first sub-part is closer to the main body than the second sub-part. The wall thickness of the first sub-part is greater than the wall thickness of the second sub-part. The wall thickness of the abutting portion gradually decreases from the first sub-part toward the second sub-part.

7. The air spring stiffness valve according to claim 6, characterized in that, The abutting part has a toothed structure, the toothed part is arranged along the circumference of the annular body, and the toothed part converges towards the axis of the body part.

8. The air spring stiffness valve according to any one of claims 1-5, characterized in that, It also includes a dynamic sealing assembly, which includes a sealing body, a first sealing element, and a second sealing element. The first sealing element is located on the inner wall of the sealing body and abuts against the sealing plug. The second sealing element abuts against the end cap component. The dynamic sealing assembly is located on the outer periphery of the sealing plug. The valve seat has a first stepped portion, and the sealing body abuts against the first stepped portion.

9. The air spring stiffness valve according to any one of claims 1-5, characterized in that, The sealing plug has a small-diameter hole and a large-diameter hole, which are connected to the channel of the valve port. The small-diameter hole includes a mating hole and a through hole that penetrate the upper and lower surfaces of the sealing plug. The through hole is located on different sides of the mating hole, and the mandrel is tightly fitted to the hole wall of the mating hole.

10. A spring stiffness valve, characterized in that, The device includes a valve seat, a moving core assembly, a head assembly, a sealing plug, a first buffer, and a second buffer. The valve seat has a valve port. The moving core assembly includes a moving core and a spindle. One end of the spindle is fixedly connected to the moving core, and the other end is connected to the sealing plug. The sealing plug can abut against or move away from the valve port. The sealing plug has a first groove, the end cap has a second groove, the first buffer and the second buffer each include a body and a protruding abutment, a notch is provided between two adjacent abutments, the body of the first buffer is at least partially confined within the first groove and tightly fitted with the first groove, and the body of the second buffer is at least partially confined within the second groove and tightly fitted with the second groove. When fully open, the sealing plug is away from the valve port. The abutment portion of the first buffer member can elastically deform and abut against the lower end face of the end cap component. The abutment portion of the second buffer member can elastically deform and abut against the upper end face of the sealing plug. A transition cavity is formed between the first buffer member and the second buffer member. The cavity on one side of the first buffer member is connected to the transition cavity through a notch in the first buffer member. The cavity on one side of the second buffer member is connected to the transition cavity through a notch in the second buffer member.

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, and the air spring stiffness valve having 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 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 1-10.

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