Valve cores and stiffness valves for stiffness valves

Abstract

This utility model belongs to the technical field of air spring equipment, specifically providing a valve core and a stiffness valve for a stiffness valve. This utility model aims to solve the problem that the sealing ring and damping components on the valve core of existing stiffness valves are prone to loosening during long-term use. To address this, the valve core of this utility model includes a base and an elastic component. The base defines at least one channel connecting both ends of the base in the axial direction. The elastic component includes a sealing part, a damping part, and a connecting part. The sealing part is located at one end of the base in the axial direction and is used to control the flow between the air inlet and outlet of the stiffness valve; the damping part is located at the other end of the base in the axial direction and is used to reduce the impact of the valve core on the valve body; the connecting part is formed within the channel, so that the sealing part, damping part, and connecting part are integrally formed on the base. This utility model overcomes the above-mentioned technical problems.

Description

Technical Field

[0001] This utility model belongs to the technical field of air spring equipment, specifically providing a valve core and a stiffness valve for a stiffness valve. Background Technology

[0002] Air springs are widely used in automobiles due to their excellent shock absorption and noise reduction effects. To adapt to different road surfaces, the stiffness of the air springs usually needs to be adjusted while the car is in motion. Therefore, automobiles also need to be equipped with stiffness valves to adjust the air spring stiffness.

[0003] Existing stiffness valves generally consist of a valve body and a valve core housed within the valve body. The valve body has an inlet and an outlet, while the valve core controls the opening and closing of the inlet and outlet.

[0004] To ensure the reliability of the valve core in blocking the flow between the inlet and outlet, a sealing ring is provided at one axial end of the valve core. To reduce the impact of the valve core on the valve body, a shock-absorbing component is provided at the other axial end of the valve core.

[0005] Current technology typically uses a press-fit method to install the sealing ring and vibration damping component onto the valve core. With this installation method, the sealing ring and vibration damping component are prone to loosening during long-term use of the stiffness valve, affecting its performance. Utility Model Content

[0006] One objective of this invention is to solve the problem that the sealing rings and shock-absorbing components on the valve core of existing stiffness valves are prone to loosening during long-term use.

[0007] To achieve the above objectives, the present invention provides, in a first aspect, a valve core for a stiffness valve, the stiffness valve comprising a valve body and the valve core, the valve body having an inlet and an outlet, and the valve core disposed within the valve body; the valve core comprising: A matrix having at least one channel connecting the two ends of the matrix in an axial direction; The elastic component includes a sealing part, a damping part, and a connecting part. The sealing part is disposed at one end of the base in the axial direction and is used to control the opening and closing between the air inlet and the air outlet. The damping part is disposed at the other end of the base in the axial direction and is used to reduce the impact of the valve core on the valve body. The connecting part is formed in the channel so that the sealing part, the damping part, and the connecting part are integrally formed on the base.

[0008] Optionally, the substrate defines at least two channels, which are centrally symmetrical with respect to the axis of the substrate to avoid overall mass eccentricity of the valve core.

[0009] Optionally, the angle between the length direction of the channel and the axial direction of the substrate is selected from any value between 5° and 30° to prevent the connecting part from moving along the axial direction of the substrate.

[0010] Optionally, the angle between the length direction of the channel and the axial direction of the substrate is selected from any value between 10° and 20°.

[0011] Optionally, the roughness of the peripheral wall of the channel is selected from any value from Ra3.2μm to Ra12.5μm to increase the friction between the substrate and the connecting part and prevent the connecting part from moving along the axial direction of the substrate.

[0012] Optionally, the two ends of the substrate in the axial direction are respectively provided with grooves, so that a portion of the sealing part and the shock-absorbing part are respectively embedded in the grooves; the grooves at both ends are connected through the channel.

[0013] Optionally, the settling tank is annular.

[0014] Optionally, the stiffness valve is suitable for adjusting the stiffness of the air spring.

[0015] Optionally, the elastic member is a rubber member molded onto the substrate using an injection molding process.

[0016] In a first aspect, this utility model provides a stiffness valve, comprising: The valve body has an air inlet and an air outlet; The valve core as described in any one of the first aspects.

[0017] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, by setting the valve core as two parts—a base and an elastic member—and defining at least one channel within the body, and by placing the sealing portion of the elastic member at one end of the base along the axial direction and the damping portion at the other end of the base along the axial direction, the connecting portion of the elastic member is formed within the channel, allowing the sealing portion, damping portion, and connecting portion to be integrally formed on the base. Therefore, this utility model can provide a force to bring the sealing portion and the damping portion closer together through the connecting portion, thus effectively preventing the sealing portion and the damping portion from becoming loose relative to the base. Moreover, even if the sealing portion and the damping portion become loose relative to the base, they will not detach from the base under the action of the connecting portion, ensuring the reliability of the stiffness valve.

[0018] Furthermore, by setting the elastic component as a rubber component molded onto the substrate using an injection molding process, the performance of the stiffness valve is also avoided from being affected by insufficient pressing of the sealing and damping parts.

[0019] Furthermore, by selecting an angle between the length direction of the channel and the axial direction of the substrate from any value between 5° and 30°, axial movement of the connecting part along the substrate is effectively prevented, especially at both ends of the connecting part along its length direction. This, in turn, enhances the axial connection strength between the sealing part and the connecting part and the substrate.

[0020] Other beneficial effects of this utility model will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improvement purpose, features and advantages of this utility model. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, some embodiments of this utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar components or parts in different drawings; the drawings of this utility model are not necessarily drawn to scale. In the drawings: Figure 1 This is an exploded view of the stiffness valve in some embodiments of this utility model; Figure 2 This is a perspective view (first axonometric view) of the stiffness valve in some embodiments of this utility model. Figure 3 This is a perspective view (second axonometric view) of the stiffness valve in some embodiments of this utility model. Figure 4 yes Figure 3 A cross-sectional view of a medium-stiffness valve along the AA direction (open state). Figure 5 yes Figure 3 Cross-sectional view of a medium-stiffness valve along the AA direction (closed state); Figure 6 yes Figure 3 A cross-sectional view of the middle valve body along the AA direction; Figure 7 yes Figure 3 A cross-sectional view of the moving parts inside the valve body along the AA direction; Figure 8 yes Figure 3 A cross-sectional view of the base of the valve core along the AA direction; Figure 9 yes Figure 3 A cross-sectional view of the elastic component of the valve core along the AA direction.

[0022] Explanation of reference numerals in the attached figures: 001. Stiffness valve; 100. Valve body; 101. Air inlet; 102. Air outlet; 110. Solenoid coil; 120. Magnetic yoke; 131. Valve seat; 132. Valve cover; 140. Housing; 150. Power plug; 160. Valve sleeve; 170. Dynamic sealing assembly; 180. Mounting seal ring; 200. Valve core; 210. Base; 211. Pressure equalizing hole; 212. Channel; 213. Countersink; 220. Elastic component; 221. Sealing part; 222. Shock-absorbing part; 223. Connecting part; 310. Armature; 320. Valve stem; 400. Return spring. Detailed Implementation

[0023] Those skilled in the art should understand that the embodiments described below are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0024] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the corresponding device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. For example, unless otherwise specified, the terms "installation," "connection," "joining," and "fixing" can specifically refer to any feasible connection form such as bolt connection, screw connection, welding, insertion, riveting, fusion welding, or snap-fit.

[0026] like Figures 1 to 5As shown, in some embodiments of this utility model, the stiffness valve 001 includes a valve body 100, a valve core 200, an armature 310, a valve stem 320, and a return spring 400.

[0027] The valve body 100 has an air inlet 101 and an air outlet 102. The air inlet 101 is used to connect to the upstream air path of the stiffness valve 001, and the air outlet 102 is used to connect to the downstream air path of the stiffness valve 001.

[0028] The valve core 200, armature 310, and valve stem 320 are all located inside the valve body 100 and fixedly connected. Under the action of the electromagnetic coil 110 in the valve body 100, the armature 310 can drive the valve core 200 to move, thereby closing the air inlet 101 and blocking the connection between the air inlet 101 and the air outlet 102.

[0029] The return spring 400 is disposed between the armature 310 and the valve body 100, and is used to drive the valve core 200 to move, thereby opening the air inlet 101 and connecting the air inlet 101 with the air outlet 102. Alternatively, those skilled in the art may, as needed, place the return spring 400 between the valve core 200 and the valve body 100, that is, make both ends of the return spring 400 abut against the valve core 200 and the valve body 100 respectively.

[0030] In other embodiments of this utility model, those skilled in the art can also, as needed, open the air inlet 101 under the action of the electromagnetic coil 110, so that the air inlet 101 and the air outlet 102 are connected; and close the air inlet 101 under the action of the return spring 400, thereby blocking the connection between the air inlet 101 and the air outlet 102.

[0031] like Figures 4 to 6 As shown, in some embodiments of this utility model, the valve body 100 includes an electromagnetic coil 110, a magnetic yoke 120, a valve seat 131, a valve cover 132, a housing 140, a power plug 150, a valve sleeve 160, a dynamic sealing assembly 170, and a mounting sealing ring 180, etc.

[0032] The electromagnetic coil 110 provides electromagnetic force to the armature 310, driving the valve core 200 to move. The magnetic yoke 120 confines the magnetic field generated by the electromagnetic coil 110 to improve its efficiency. The valve seat 131 and valve cover 132 are located at opposite ends of the housing 140 along the axial direction (o), and are fixedly connected to the housing 140 to encapsulate and protect components such as the electromagnetic coil 110, magnetic yoke 120, valve sleeve 160, and dynamic sealing assembly 170. The power plug 150 is installed on the valve cover 132 and electrically connected to the electromagnetic coil 110 to provide power. The valve sleeve 160 accommodates the armature 310 and guides the axial movement of the valve core 200 and the armature 310. The dynamic sealing assembly 170 provides a sliding seal with the valve core 200 to prevent gas leakage from the high-pressure side to the low-pressure side along the axial direction (o) of the dynamic sealing assembly 170. The sealing ring 180 is installed to seal the valve body 100 with the object being installed (such as a metal block with a insertion hole, pipe fitting, etc.) to prevent high-pressure gas leakage.

[0033] like Figures 4 to 6 As shown, with the valve body 100 assembled, the valve seat 131 and valve cover 132 are fixedly mounted to both ends of the housing 140 along the axial direction o. This fixed connection can be an interference fit, threaded connection, welding, or it can be connected by other parts, such as by snap-fit ​​rings. The electromagnetic coil 110 is disposed inside the housing 140, the magnetic yoke 120 is disposed between the valve seat 131 and the electromagnetic coil 110, the power plug 150 is installed at the valve cover 132, and the valve sleeve 160 is disposed inside the electromagnetic coil 110. The dynamic sealing assembly 170 is disposed along its axial direction o between the valve seat 131 and the magnetic yoke 120 and is clamped by the valve seat 131 and the magnetic yoke 120. The valve seat 131 and the outer side of the housing 140 are respectively provided with mounting sealing rings 180.

[0034] from Figure 6 As can be seen from the figure, in some embodiments of this utility model, the air inlet 101 is formed at the axial end of the valve seat 131 away from the magnetic yoke 120, and the air outlet 102 is formed on the circumferential sidewall of the valve seat 131. The valve seat 131 has an inwardly protruding annular structure (not marked in the figure) between the air inlet 101 and the air outlet 102, and a conical ring is provided on the side of this annular structure near the magnetic yoke 120. This conical ring abuts against the valve core 200, thus sealing the air inlet 101.

[0035] It should be noted that in actual use, the air inlet 101 can also be used as the air outlet, and the air outlet 102 can be used as the air inlet.

[0036] Furthermore, in other embodiments of this utility model, those skilled in the art may omit at least one of the following components as needed: magnetic yoke 120, valve seat 131, valve cover 132, housing 140, power plug 150, valve sleeve 160, dynamic sealing assembly 170, and mounting sealing ring 180. For example, the valve sleeve 160 may be omitted.

[0037] like Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments of this utility model, the valve core 200 includes a base 210 and an elastic member 220.

[0038] like Figure 8 As shown, the substrate 210 defines at least one channel 212, which connects the two ends of the substrate 210 in the axial direction.

[0039] like Figure 1 , Figure 7 and Figure 9 As shown, the elastic member 220 includes a sealing portion 221, a damping portion 222, and a connecting portion 223. The sealing portion 221 is disposed at one end of the base 210 in the axial direction and is used to control the opening and closing between the air inlet 101 and the air outlet 102. The damping portion 222 is disposed at the other end of the base 210 in the axial direction and is used to reduce the impact of the valve core 200 on the valve body 100. The connecting portion 223 is formed in the channel 212 so that the sealing portion 221, the damping portion 222, and the connecting portion 223 are integrally formed on the base 210.

[0040] Those skilled in the art will understand that the presence of the channel 212 on the substrate 210 and the connecting portion 223 of the elastic member 220 allows the sealing portion 221 and the damping portion 222 to be integrally formed on the substrate 210. Furthermore, the presence of the connecting portion 223 effectively prevents the sealing portion 221 and the damping portion 222 from becoming loose relative to the substrate 210. Even if the sealing portion 221 and the damping portion 222 become loose relative to the substrate 210, the connecting portion 223 will prevent them from disengaging from the substrate 210, ensuring the reliability of the stiffness valve 001.

[0041] Furthermore, the substrate 210 defines at least two channels 212, for example, two, three, four, etc. These at least two channels 212 are relative to the axis of the substrate 210 (e.g., Figure 8 The dotted lines extending vertically are centrally symmetrical to avoid overall mass eccentricity of the valve core 200 and ensure the reliability of the stiffness valve 001.

[0042] like Figure 8As shown, the angle γ between the length direction of the channel 212 and the axial direction of the base 210 is selected from any value between 5° and 30° to prevent the connecting part 223 from moving along the axial direction of the base 210.

[0043] Specifically, the included angle γ can be any feasible value such as 5°, 85°, 10°, 12°, 15°, 20°, 25°, 30°, etc.

[0044] Furthermore, the angle γ between the length direction of the channel 212 and the axial direction of the substrate 210 is selected from any value between 10° and 20°.

[0045] Those skilled in the art will understand that by ensuring the angle γ between the length direction of the channel 212 and the axial direction of the base 210 satisfies the above-mentioned condition, axial movement of the connecting portion 223 along the base 210 is effectively prevented, particularly at both ends of the connecting portion 223 along its length direction. Furthermore, this enhances the axial connection strength between the sealing portion 221 and the connecting portion 223 and the base 210. This is because when the connecting portion 223 moves axially along the base 210, the inclined surface of the channel 212 provides resistance to axial movement of the connecting portion 223, thereby preventing axial movement of the connecting portion 223 along the base 210.

[0046] Furthermore, the roughness of the peripheral wall of the channel 212 is selected from any value from Ra3.2μm to Ra12.5μm to increase the friction between the substrate 210 and the connecting part 223 and prevent the connecting part 223 from moving along the axial direction of the substrate 210.

[0047] The roughness of the peripheral wall of channel 212 can be any feasible value such as Ra3.2μm, Ra3.5μm, Ra4μm, Ra6.3μm, Ra7μm, Ra9μm, Ra11μm, Ra12.5μm.

[0048] like Figure 8 As shown, the two ends of the substrate 210 in the axial direction are respectively provided with grooves 213, so that a portion of the sealing part 221 and the damping part 222 are respectively embedded in the grooves 213, so as to fix the sealing part 221 and the damping part 222 in the radial direction and prevent the sealing part 221 and the damping part 222 from being misaligned in the radial direction.

[0049] from Figure 8 As can be seen, the two ends of the settling tank 213 are connected by the channel 212 to reduce the production difficulty of the channel 212.

[0050] Furthermore, the settling groove 213 is annular to reduce the mass of the substrate 210. Of course, those skilled in the art can also set the settling groove 213 to any other feasible shape as needed. For example, multiple circular grooves or crescent-shaped grooves are evenly distributed along the circumference of the substrate 210.

[0051] like Figure 1 , Figure 4-5 , Figure 7-8 As shown, in some embodiments of this utility model, the base 210 is penetrated by the valve stem 320 and fixedly connected to the valve stem 320. The connection between the base 210 and the valve stem 320 can be any feasible connection such as an interference fit or a threaded connection. The base 210 is also provided with pressure equalization holes 211 connecting the upper and lower sides of the base 210 to balance the air pressure on the upper and lower sides of the base 210.

[0052] Among them, the equalizing hole 211 is not limited to the semi-circular hole with open peripheral walls shown in the figure, but can also be a circular hole with closed peripheral walls.

[0053] Accordingly, the armature 310 is penetrated by the valve stem 320 and fixedly connected to the valve stem 320. The connection between the armature 310 and the valve stem 320 can be any feasible connection such as interference fit or threaded connection.

[0054] Furthermore, in some embodiments of this utility model, the elastic member 220 may be a rubber member molded on the base 210 by injection molding process, so as to avoid the sealing part 221 and the shock-absorbing part 222 from affecting the performance of the stiffness valve 001 due to insufficient pressing.

[0055] The following reference Figure 4 and Figure 5 The working principle of the stiffness valve 001 in some embodiments of this utility model will be briefly explained.

[0056] like Figure 4 As shown, when the electromagnetic coil 110 is de-energized, under the action of the return spring 400, the armature 310 and the yoke 120 move away from each other, thereby causing the valve core 200 to open the air inlet 101, making the air inlet 101 and the air outlet 102 connected. In this state, gas can flow from the air inlet 101 to the air outlet 102.

[0057] When the electromagnetic coil 110 is energized, the magnetic field generated by the electromagnetic coil 110 acts on the armature 310 and the yoke 120, causing the armature 310 and the yoke 120 to attract each other. This magnetic force overcomes the elastic force of the return spring 400, driving the valve core 200 from... Figure 4 Move to the position shown Figure 5 The location shown.

[0058] like Figure 5As shown, when the electromagnetic coil 110 is energized, the valve core 200 abuts against the valve seat 131, sealing the air inlet 101. High-pressure gas in the upstream air path connected to the air inlet 101 flows through the equalizing hole 211 to the top side of the valve core 200 (e.g., Figure 5 (as shown by the dashed line), thus making the air pressure on both sides of the valve core 200 along the axial direction o equal, thereby reducing the pressure difference experienced by the valve core 200. At the same time, the high-pressure gas on the top side of the valve core 200 will fill the entire interior of the valve body 100 through the gap between the valve stem 320 and the magnetic yoke 120, and the armature 310 and the valve sleeve 160, so that the pressure difference experienced by the entire valve core 200 along the axial direction o is as small as possible.

[0059] When the electromagnetic coil 110 is de-energized, the return spring 400 drives the valve core 200, armature 310, and valve stem 320 to move from... Figure 5 Move to the position shown Figure 4 The position shown. At the instant the valve core 200 disengages from the valve seat 131, the high-pressure air inside the valve body 100 is quickly released through the equalizing hole 211, the gap between the valve stem 320 and the magnetic yoke 120, and the gap between the armature 310 and the valve sleeve 160, ensuring that the movement of the valve core 200 is not affected by the air pressure difference.

[0060] Furthermore, the stiffness valve 001 described in any of the preceding embodiments of this utility model can be used to adjust the stiffness of the air spring and can be installed in automobiles.

[0061] The technical solution of this utility model has been described in conjunction with several embodiments above. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is not limited to these specific embodiments. Without departing from the technical principles of this utility model, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to the relevant technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of this utility model will fall within the protection scope of this utility model.

Claims

1. A valve core for a stiffness valve, the stiffness valve comprising a valve body and the valve core, the valve body having an inlet and an outlet, the valve core being disposed within the valve body; characterized in that, The valve core includes: A matrix having at least one channel connecting the two ends of the matrix in an axial direction; The elastic component includes a sealing part, a damping part, and a connecting part. The sealing part is disposed at one end of the base in the axial direction and is used to control the opening and closing between the air inlet and the air outlet. The damping part is disposed at the other end of the base in the axial direction and is used to reduce the impact of the valve core on the valve body. The connecting part is formed in the channel so that the sealing part, the damping part, and the connecting part are integrally formed on the base.

2. The valve core for a stiffness valve according to claim 1, characterized in that, The substrate defines at least two of the channels. At least two of the channels are centrally symmetrical with respect to the axis of the substrate to avoid overall mass eccentricity of the valve core.

3. The valve core for a stiffness valve according to claim 1, characterized in that, The angle between the length direction of the channel and the axial direction of the substrate is selected from any value between 5° and 30° to prevent the connecting part from moving along the axial direction of the substrate.

4. The valve core for a stiffness valve according to claim 3, characterized in that, The angle between the length direction of the channel and the axial direction of the substrate is selected from any value between 10° and 20°.

5. The valve core for a stiffness valve according to claim 3, characterized in that, The roughness of the peripheral wall of the channel is selected from any value from Ra3.2μm to Ra12.5μm to increase the friction between the substrate and the connecting part and prevent the connecting part from moving along the axial direction of the substrate.

6. The valve core for a stiffness valve according to claim 1, characterized in that, The base has grooves at both ends along its axial direction, so that a portion of the sealing part and a portion of the shock-absorbing part are respectively embedded in the grooves. The sinkholes at both ends are connected by the channel.

7. The valve core for a stiffness valve according to claim 6, characterized in that, The settling tank is annular.

8. The valve core for a stiffness valve according to any one of claims 1 to 7, characterized in that, The stiffness valve is used to adjust the stiffness of an air spring.

9. The valve core for a stiffness valve according to any one of claims 1 to 7, characterized in that, The elastic component is a rubber component formed on the substrate using an injection molding process.

10. A stiffness valve, characterized in that, include: The valve body has an air inlet and an air outlet; The valve core according to any one of claims 1 to 9.

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