Rigidity valve

Abstract

The rigidity valve comprises an end socket, a mandrel and a sealing module, the rigidity valve is provided with a valve port and a first cavity, the sealing module comprises a sealing block, a first gasket and a second gasket, part of the end socket and part of the sealing block roughly define the first cavity, and the sealing block is provided with a circulation hole; the first gasket and the core shaft are arranged into a whole, or the first gasket is provided with a first matching hole, and part of the core shaft is fixedly connected into the first matching hole or is connected into the first matching hole in a limiting manner; the first gasket and the sealing block are fixedly connected or connected in a limiting mode, the first gasket is provided with a first communicating hole, the second gasket and the sealing block are fixedly connected or connected in a limiting mode or arranged into a whole, the second gasket is provided with a second matching hole and a second communicating hole, and part of the mandrel is fixedly connected or connected in the second matching hole in a limiting mode. One end of the first communicating hole communicates with the first cavity, the other end of the first communicating hole communicates with the second communicating hole, and the second communicating hole communicates with the valve port. The machining difficulty of the circulation hole of the sealing block can be relatively reduced.

Description

Technical Field

[0001] This invention relates to the field of valve device technology, and in particular to a stiffness valve. Background Technology

[0002] Dual-chamber or triple-chamber air springs installed on automotive frames to adjust frame height typically rely on air spring stiffness valves for stiffness adjustment. These valves have a valve port and include a head, iron core, valve stem, and sealing block. The valve stem is fixedly connected to the iron core. Through coil excitation, the valve stem can move the sealing block against or away from the valve port. When the stiffness valve is open, the cavity volume of the dual-chamber or triple-chamber air spring increases, the compressible gas volume increases, and the stiffness decreases. When the stiffness valve is closed, the cavity volume of the dual-chamber or triple-chamber air spring decreases, the compressible gas volume decreases, and the stiffness increases. The sealing block has flow holes for balancing the pressure of the upper and lower cavities; however, the machining of these flow holes often requires specialized equipment. Those skilled in the art can further improve the design of the sealing block structure. Summary of the Invention

[0003] This application provides a stiffness valve that can relatively reduce the machining difficulty of the flow hole of the sealing block.

[0004] The rigidity valve provided in this application includes a head, a spindle, and a sealing module. The rigidity valve has a valve port and a first cavity. The sealing module can approach or move away from the valve port. The sealing module includes a sealing block, a first gasket, and a second gasket. Part of the head and part of the sealing block substantially enclose the first cavity. The sealing block has a flow hole.

[0005] The first gasket and the mandrel are integrally formed, or the first gasket is provided with a first mating hole, and part of the mandrel is fixedly connected to or limitedly connected to the first mating hole;

[0006] The first gasket is fixedly connected or limited to the sealing block. The first gasket has a first connecting hole. The second gasket is fixedly connected or limited to the sealing block or is integrated with it. The second gasket has a second mating hole and a second connecting hole. Part of the spindle is fixedly connected or limited to the second mating hole. One end of the first connecting hole is connected to the first cavity. The other end of the first connecting hole is connected to the second connecting hole. The second connecting hole is connected to the valve port.

[0007] The rigidity valve provided in this application improves the sealing module. The sealing module includes a sealing block, a first gasket, and a second gasket. The first gasket and the second gasket are respectively provided with a first connecting hole and a second connecting hole. One end of the first connecting hole is connected to the first cavity, and the other end of the first connecting hole is connected to the second connecting hole. The second connecting hole is connected to the valve port. The first gasket is fixedly connected to the spindle, or is limited to it, or is integrated with it. The first gasket is fixedly connected to the sealing block, or is limited to it. The second gasket is fixedly connected to the spindle, or is limited to it, or is integrated with it. The processing of the connecting holes on the two gaskets is relatively convenient, which can achieve pressure balance between the first cavity and the valve port and can relatively reduce the processing difficulty of the flow hole on the sealing block. Attached Figure Description

[0008] Figure 1 A cross-sectional view of the stiffness valve provided in this application in its open state according to one embodiment;

[0009] Figure 2 for Figure 1 The cross-sectional view shown is of the stiffness valve in the closed state.

[0010] Figure 3 for Figure 1 A cross-sectional view of the central sealing block, buffer pad, first gasket, second gasket, mandrel, and seal;

[0011] Figure 4 for Figure 1 Cross-sectional view of the central sealing block;

[0012] Figure 5 for Figure 1 Top view of the first gasket in the middle;

[0013] Figure 6 for Figure 1 Top view of the second gasket;

[0014] Figure 7 for Figure 1 Exploded three-dimensional view of the middle section structure;

[0015] Figure 8 for Figure 1 Cross-sectional view of the core iron and mandrel.

[0016] The annotations in the attached figures are explained as follows:

[0017] 1 Valve seat, 1a Valve port, 2 Sealing block, 2a Flow hole, 2b First step, 2c Second step, 2d Groove, 3 Sealing element, 4 Core iron, 4a Core iron through hole, 4b Convex surface, 4c Concave surface, 5 Mandrel, 5c First limiting step, 5d Second limiting step, 6 First gasket, 7 Second gasket, 8 Sleeve, 9 End cap, 10 Spring, 11 Coil, 12 Coil bracket, 13 Buffer pad, 14 Magnetic conductor, 15 Connecting seat, 16 End cap, A First cavity, B First mating hole, C First connecting hole, D Second mating hole, E Second connecting hole, F Annular connecting cavity. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figures 1-3 As shown, the stiffness valve of this application has a valve port 1a and a first cavity A, including a head 9, a spindle 5, and a sealing module. Part of the head 9 and part of the sealing block 2 generally enclose and form the first cavity A.

[0020] The sealing module can be close to or away from the valve port 1a. The sealing module includes a sealing block 2, a first gasket 6, and a second gasket 7. The sealing block 2 is provided with a flow hole 2a.

[0021] The first washer 6 and the mandrel 5 are integrally formed. Alternatively, the first washer 6 is provided with a first mating hole B, and part of the mandrel 5 is fixedly connected to or limitedly connected to the first mating hole B, the shape of the first mating hole B being consistent with the cross-sectional shape of the mandrel 5.

[0022] The first gasket 6 is fixedly connected or limited to the sealing block 2, and the first gasket 6 is provided with a first connecting hole C.

[0023] The second gasket 7 is fixedly connected to, limited by, or integrally formed with the sealing block 2. The second gasket 7 has a second mating hole D and a second connecting hole E, and part of the mandrel 5 is fixedly connected to or limited by the second mating hole D. The shape of the second mating hole D is basically the same as the cross-sectional shape of the mandrel 5.

[0024] One end of the first connecting hole C is connected to the first cavity A, and the other end of the first connecting hole C is connected to the second connecting hole E. The second connecting hole E is connected to the valve port 1a.

[0025] The rigidity valve provided in this application allows for pressure balance between the valve port 1a and the first cavity A through the interconnected first connecting hole C and second connecting hole E when the sealing module seals the valve port 1a.

[0026] In the past, rigid valves did not have a first gasket and a second gasket in the sealing module. They relied solely on the flow hole on the sealing block to achieve pressure balance between the valve port and the first cavity. The flow hole on the sealing block had to have both a mating part that cooperated with the spindle and a flow part for the medium to flow through. Therefore, the shape of the flow hole on the sealing block was relatively complex and inconvenient to process.

[0027] In this application, the sealing module is improved. The sealing module includes a sealing block, a first gasket, and a second gasket. The first gasket and the second gasket are respectively provided with a first connecting hole and a second connecting hole. One end of the first connecting hole is connected to the first cavity, and the other end of the first connecting hole is connected to the second connecting hole. The second connecting hole is connected to the valve port. It is relatively convenient to process the connecting holes on the two gaskets, which can relatively reduce the processing difficulty of the flow hole on the sealing block.

[0028] More specifically, the sealing module may also include a seal 3, which is assembled on the end of the sealing block 2 near the valve port 1a and abuts against the valve seat 1. The seal 3 has less rigidity than the sealing block 2, and the seal 3 may be made of rubber.

[0029] More specifically, the sealing block 2 is provided with a flow hole 2a. The first gasket 6 and the second gasket 7 are located within the flow hole 2a. An annular connecting cavity F is formed between the flow hole 2a and the mandrel 5. The annular connecting cavity F connects the first connecting hole C and the second connecting hole E; in other words, the first connecting hole C is connected to the second connecting hole E through the annular connecting cavity F.

[0030] Preferably, both the first gasket 6 and the second gasket 7 are located within the flow hole 2a. The first gasket 6 is welded to the sealing block 2 and is also interference-fitted with the mandrel 5. The second gasket 7 is also interference-fitted with the sealing block 2 and is welded to the mandrel 5. This design makes the processing and assembly of the first gasket 6, sealing block 2, second gasket 7, and mandrel 5 relatively convenient, and results in high reliability after assembly.

[0031] Preferred, such as Figure 3 As shown, the end face of the first gasket 6 away from the valve port 1a (the upper end face of the first gasket 6 in the figure) is flush with and welded to the end face of the sealing block 2 away from the valve port 1a (the upper end face 2e of the sealing block 2 in the figure). In this way, the welding operation is relatively easy and the reliability after welding is high.

[0032] Preferred, such as Figure 3 As shown, the end face of the second gasket 7 near the valve port 1a (the lower end face of the second gasket 7 in the figure) is flush with and welded to the end face of the mandrel 5 near the valve port (the lower end face 5b of the mandrel 5 in the figure). This makes the welding operation easier and the reliability after welding is higher.

[0033] Preferred, such as Figure 3 and Figure 4As shown, a first step 2b is provided inside the flow hole 2a, a first limiting step 5c is provided on the outer periphery of the spindle 5, the end of the first gasket 6 near the valve port 1a (6b in the figure) abuts against the first step 2b, and the end of the first gasket 6 away from the valve port 1a (6a in the figure) abuts against the first limiting step 5c. And / or, a second step 2c is provided inside the flow hole 2a, a second limiting step 5d is provided on the outer periphery of the spindle 5, the end of the second gasket 7 near the valve port 1a (7b in the figure) abuts against the second step 2c, and the end of the second gasket 7 away from the valve port 1a (7a in the figure) abuts against the second limiting step 5d.

[0034] During valve closing, at the instant the sealing module abuts against the valve seat 1, the sealing block 2 of the sealing module is subjected to an upward recoil force, which can easily cause relative displacement between the gasket and the sealing block 2. Since the lower end face of the gasket abuts against the step on the sealing block 2, the risk of relative displacement between the gasket and the sealing block 2 is reduced. During valve opening, the gasket is subjected to an upward inertial force, which can easily cause relative displacement between the gasket and the spindle 5. Since the upper end face of the gasket abuts against the limiting step on the spindle 5, the risk of relative displacement between the gasket and the spindle 5 is reduced.

[0035] More specifically, the connecting hole on the gasket can be a circumferentially closed hole or a non-closed hole with a circumferential notch, for example, Figure 5 In the diagram, the first connecting hole C is a circumferentially closed closed hole. Figure 6 In the middle, the second connecting hole E is a non-closed hole with a notch in the circumferential direction.

[0036] More specifically, such as Figure 1 and Figure 2 As shown, the stiffness valve also includes a valve seat 1, a core iron 4, a sleeve 8, a spring 10, a buffer pad 13, a coil 11, a coil support 12, a magnetic conductor 14, a connecting seat 15, and an end cap 16.

[0037] Valve port 1a is located on valve seat 1. End cap 9 is fixed to the end of sleeve 8 near valve port 1a, specifically by welding. Core iron 4 is confined within the space enclosed by sleeve 8 and end cap 9, and can move axially within this space. Spring 10 is confined between core iron 4 and end cap 9. Buffer pad 13 is confined between sealing block 2 and end cap 9; specifically, a groove 2d can be provided at the end of sealing block 2 away from valve port 1a (see...). Figure 7 A buffer pad 13 is embedded in the groove portion 2d. A coil support 12 is fitted around the outer periphery of the sleeve 8. A coil 11 is wound around the coil support 12. A magnetic conductor 14 surrounds the outer periphery of the coil 11 and the coil support 12. The end of the magnetic conductor 14 near the valve port 1a is fixed to the valve seat 1, specifically by riveting. An end cap 16 is fitted around the outer periphery of the end of the magnetic conductor 14 away from the valve port 1a and around the outer periphery of the connecting seat 15. The end cap 16 is fixed to the connecting seat 15, specifically by welding.

[0038] More specifically, such as Figure 8 As shown, the core iron 4 can move axially to drive the sealing module closer to or further away from the valve port 1a. The core iron 4 has a core iron through hole 4a. Part of the mandrel 5 is located within the core iron through hole 4a. The mandrel 5 is welded and fixed to the core iron 4. This ensures a high connection strength between the core iron 4 and the mandrel 5, thereby reducing the risk of relative displacement between the core iron 4 and the mandrel 5 during valve opening and closing, thus improving the reliability and service life of the rigid valve.

[0039] Preferred, such as Figure 8 As shown, the end face of the core iron 4 furthest from the valve port 1a includes a convex surface 4b and a concave surface 4c. The concave surface 4c is closer to the valve port 1a than the convex surface 4b. The orifice of the core iron through hole 4a is formed on the concave surface 4c. The weld mark between the mandrel 5 and the core iron 4 is closer to the valve port 1a than the convex surface 4b; that is, from the illustrated perspective, the weld mark between the mandrel 5 and the core iron 4 is located below the convex surface 4b. This design avoids the weld mark between the mandrel 5 and the core iron 4 from impacting the upper end of the sleeve 8, thereby further improving the reliability and service life of the rigidity valve.

[0040] Preferred, such as Figure 8 As shown, the end face of the mandrel 5 furthest from the valve port 1a (indicated by 5a in the figure) is flush with and welded to the concave surface 4c of the core iron 4. This design facilitates welding operations and helps ensure welding quality.

[0041] The above examples illustrate the principles and implementation methods of the present invention. These embodiments are merely illustrative and intended to aid in understanding the method and core concepts of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A stiffness valve, characterized in that, The device includes a head, a mandrel, and a sealing module. The stiffness valve has a valve port and a first cavity. The sealing module can approach or move away from the valve port. The sealing module includes a sealing block, a first gasket, and a second gasket. Part of the head and part of the sealing block substantially enclose the first cavity. The sealing block has a flow hole. The first gasket and the mandrel are integrally formed, or the first gasket is provided with a first mating hole, and part of the mandrel is fixedly connected to or limitedly connected to the first mating hole; The first gasket is fixedly connected or limited to the sealing block. The first gasket has a first connecting hole. The second gasket is fixedly connected or limited to the sealing block or is integrated with it. The second gasket has a second mating hole and a second connecting hole. Part of the spindle is fixedly connected or limited to the second mating hole. One end of the first connecting hole is connected to the first cavity. The other end of the first connecting hole is connected to the second connecting hole. The second connecting hole is connected to the valve port.

2. The stiffness valve according to claim 1, characterized in that, Part of the mandrel is located within the flow hole, and an annular connecting cavity is formed between the flow hole and the mandrel, the annular connecting cavity connecting the first connecting hole and the second connecting hole.

3. The stiffness valve according to claim 2, characterized in that, Both the first gasket and the second gasket are located within the flow hole. The first gasket is welded to the sealing block and is interference-fitted with the mandrel. The second gasket is interference-fitted with the sealing block and is welded to the mandrel.

4. The stiffness valve according to claim 3, characterized in that, The end face of the first gasket away from the valve port is flush with and welded to the end face of the sealing block away from the valve port.

5. The stiffness valve according to claim 3, characterized in that, The end face of the second gasket near the valve port is flush with and welded to the end face of the mandrel near the valve port.

6. The stiffness valve according to claim 2, characterized in that, The flow hole is provided with a first step, the outer periphery of the mandrel is provided with a first limiting step, the end of the first gasket near the valve port abuts against the first step, and the end of the first gasket away from the valve port abuts against the first limiting step.

7. The stiffness valve according to claim 2, characterized in that, The flow hole is provided with a second step, the outer periphery of the spindle is provided with a second limiting step, the end of the second gasket near the valve port abuts against the second step, and the end of the second gasket away from the valve port abuts against the second limiting step.

8. The stiffness valve according to any one of claims 1-7, characterized in that, The stiffness valve includes a core iron with a through hole, a portion of the mandrel is located within the through hole, and the mandrel is welded to the core iron.

9. The stiffness valve according to claim 8, characterized in that, The end face of the core iron away from the valve port includes a convex surface and a concave surface. The concave surface is closer to the valve port than the convex surface, and the weld mark between the core iron and the mandrel is closer to the valve port than the convex surface.

10. The stiffness valve according to claim 9, characterized in that, The end face of the mandrel away from the valve port is flush with and welded to the concave surface of the core iron.

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