solenoid valve

Abstract

The utility model belongs to solenoid valve technical field, specifically provides a solenoid valve. The utility model aims at. Solve the problem that the seal between the valve core subassembly and the valve body subassembly is easy to fail because the impact of the valve core subassembly to the valve body subassembly is big in the prior art solenoid valve. For this purpose, the solenoid valve of the utility model includes valve body subassembly, valve core subassembly and communication area shock pad. Among them, the valve body subassembly is defined with air inlet, air outlet and accommodating cavity. The valve core subassembly is movably arranged in the accommodating cavity, and the accommodating cavity is divided into inlet and outlet communication area and isolation area, and the inlet and outlet communication area is communicated with the air inlet and the air outlet respectively;Valve core subassembly is used for blocking the air path between air inlet and air outlet. The communication area shock pad is arranged in the inlet and outlet communication area to slow down the impact of the valve core subassembly on the valve body subassembly when the valve core subassembly blocks the air path between the air inlet and the air outlet. The utility model overcomes the above technical problems.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, and specifically provides an electromagnetic valve. Background Technology

[0002] Air springs are widely used in the suspension systems of various vehicles. They achieve variable stiffness characteristics by adjusting the air chamber pressure, thus balancing driving comfort and handling stability. The solenoid valve is the core component for adjusting the stiffness of the air spring. Through the movement of its internal valve core assembly, it controls the opening and closing of the air passage between the air inlet and outlet, thereby changing the effective air chamber volume of the air spring and achieving stiffness adjustment.

[0003] Existing solenoid valves generally consist of a valve body assembly and a valve core assembly. The valve core assembly moves within the valve body assembly to open or close the air passage between the inlet and outlet. When the air passage between the inlet and outlet is closed, the valve core assembly and the valve body assembly are sealed together. However, because the valve core assembly moves at a very high speed, the impact force between it and the valve body assembly is very large, which can easily lead to seal failure over time. Utility Model Content

[0004] One objective of this invention is to solve the problem that existing solenoid valves are prone to sealing failure between the valve core assembly and the valve body assembly due to the large impact force of the valve core assembly on the valve body assembly.

[0005] To achieve the above objectives, this utility model provides a solenoid valve, comprising: The valve body assembly defines an air inlet, an air outlet, and a receiving cavity; A valve core assembly is movably disposed in the receiving cavity and divides the receiving cavity into an inlet / outlet communication area and an isolation area. The inlet / outlet communication area is respectively connected to the air inlet and the air outlet. The valve core assembly is used to block the air passage between the air inlet and the air outlet. A shock-absorbing pad is arranged in the inlet / outlet connecting area to reduce the impact of the valve core assembly on the valve body assembly when the valve core assembly blocks the air passage between the air inlet and the air outlet.

[0006] Optionally, the valve core assembly is provided with an annular abutment surface facing away from the isolation area, the valve body assembly includes a stop ring located on the side of the abutment surface away from the isolation area, and the communication area damping pad is an annular component disposed between the abutment surface and the stop ring.

[0007] Optionally, the valve body assembly further includes a valve nozzle, a connecting pipe, a magnetic ring tube, a magnetic shielding tube, and a stationary iron core arranged in sequence, wherein any two adjacent of the valve nozzle, the connecting pipe, the magnetic ring tube, the magnetic shielding tube, and the stationary iron core are fixedly connected or integrally formed; the stop ring is clamped by the connecting pipe and the magnetic ring tube in the moving direction of the valve core assembly.

[0008] Optionally, the stop ring is configured as an annular sheet structure, and the stop ring is capable of elastic deformation along the moving direction of the valve core assembly, so as to cooperate with the shock-absorbing pad of the connecting area to absorb the kinetic energy of the valve core assembly and reduce the impact of the valve core assembly on the valve body assembly.

[0009] Optionally, the outer peripheral surface of the valve core assembly includes a planar region, such that the planar region and the peripheral wall of the receiving cavity define an airflow channel that connects the inlet / outlet communication area and the isolation area, thereby balancing the air pressure between the inlet / outlet communication area and the isolation area through the airflow channel.

[0010] Optionally, the valve core assembly includes a moving iron core, a valve plug, and a wear-resistant sleeve. The valve plug is installed at the end of the moving iron core away from the isolation zone to block the air passage between the air inlet and the air outlet. The wear-resistant sleeve is fitted over the outside of the moving iron core so that the moving iron core slides in contact with the peripheral wall of the receiving cavity through the wear-resistant sleeve.

[0011] Optionally, the connecting area damping pad is a component made of porous polymer material, so that the elastic coefficient of the connecting area damping pad is small in the initial stage of compression and large in the final stage of compression, thereby reducing the impact of the valve core assembly on the valve body assembly while ensuring the response speed of the valve core assembly to block.

[0012] Optionally, the porous polymer material is foamed silicone, foamed PU, or foamed polypropylene; and / or, the thickness of the shock-absorbing pad in the connecting area is less than or equal to the maximum axial length of the inlet and outlet connecting area.

[0013] Optionally, the connecting area damping pad is configured as an annular shape, and the outer and / or inner peripheral contours of the connecting area damping pad are configured as star-shaped or polygonal.

[0014] Optionally, the solenoid valve further includes a return spring disposed between the valve body assembly and the valve core assembly to drive the valve core assembly to block the air passage between the air inlet and the air outlet.

[0015] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, by arranging a shock-absorbing pad in the inlet and outlet connecting area, the impact of the valve core assembly on the valve body assembly can be reduced when the valve core assembly blocks the air path between the air inlet and outlet, effectively overcoming the problem of sealing failure between the valve core assembly and the valve body assembly.

[0016] Furthermore, by placing the shock-absorbing pad in the connecting area between the contact surface of the valve core assembly and the stop ring of the valve body assembly, and enabling the stop ring to undergo elastic deformation along the moving direction of the valve core assembly, the shock-absorbing pad in the connecting area and the stop ring can jointly absorb the kinetic energy of the valve core assembly, thereby further mitigating the impact of the valve core assembly on the valve body assembly.

[0017] Furthermore, by setting the shock-absorbing pad of the connecting area as a component made of porous polymer material, the elastic modulus of the shock-absorbing pad of the connecting area is smaller in the initial stage of compression and larger in the final stage of compression, thereby reducing the impact of the valve core assembly on the valve body assembly while ensuring the response speed of the valve core assembly to block.

[0018] 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

[0019] 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 (first isometric view) of the solenoid valve in some embodiments of this utility model. Figure 2 This is an exploded view (second isometric view) of the solenoid valve in some embodiments of this utility model. Figure 3 This is a perspective view of the solenoid valve in some embodiments of this utility model; Figure 4 This is a radial view of the solenoid valve in some embodiments of this utility model; Figure 5 yes Figure 4 Cross-sectional view of the intermediate coil assembly along the AA direction; Figure 6 This is a perspective view of the solenoid valve in some embodiments of this utility model (the coil assembly is hidden). Figure 7 yes Figure 4A cross-sectional view along the AA direction when the solenoid valve is de-energized (coil assembly is hidden). Figure 8 yes Figure 7 Enlarged view of section F in the middle; Figure 9 yes Figure 4 A cross-sectional view along the AA direction when the solenoid valve is energized (the coil assembly is hidden). Figure 10 This is a cross-sectional view of the shock-absorbing pad in the isolation zone in some other embodiments of this utility model; Figure 11 This is a diagram showing the relationship between the elasticity and deformation of the isolation zone damping pad and the connecting zone damping pad in this utility model.

[0020] Explanation of reference numerals in the attached figures: 001. Solenoid valve; 100. Valve body assembly; 101. Air inlet; 102. Air outlet; 103. Receiving cavity; 1031. Inlet / outlet connection area; 1032. Isolation area; 104. Airflow guide channel; 110. Valve nozzle; 120. Connecting pipe; 130. Magnetic guide ring tube; 140. Magnetic shielding tube; 150. Static iron core; 151. Spring positioning hole; 160. Stop ring; 200, Valve core assembly; 201, Planar area; 202, Abutment surface; 210, Moving iron core; 211, Blind hole; 220, Valve plug; 230, Wear-resistant sleeve; 300. Return spring; 400. Coil assembly; 410. Electromagnetic coil; 420. Coil bracket; 430. Coil housing; 510. Vibration damping pad for isolation zone; 520. Vibration damping pad for connecting zone. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the solenoid valve 001 includes a valve body assembly 100, a valve core assembly 200, a return spring 300, a coil assembly 400, an isolation zone damping pad 510, and a connecting zone damping pad 520.

[0025] like Figures 3 to 7 As shown, in some embodiments of the present invention, the valve body assembly 100 defines an air inlet 101, an air outlet 102, and a receiving cavity 103.

[0026] like Figure 7 As shown, in some embodiments of this utility model, the valve core assembly 200 is movably disposed in the receiving cavity 103, dividing the receiving cavity 103 into an inlet / outlet communication area 1031 and an isolation area 1032. The inlet / outlet communication area 1031 is connected to the air inlet 101 and the air outlet 102, respectively. The valve core assembly 200 is used to block the air passage between the air inlet 101 and the air outlet 102.

[0027] like Figure 7 As shown, in some embodiments of this utility model, a reset spring 300 is disposed between the valve body assembly 100 and the valve core assembly 200 to drive the valve core assembly 200 to block the air passage between the air inlet 101 and the air outlet 102, and to keep the valve core assembly 200 in this state.

[0028] like Figures 3 to 5 As shown, in some embodiments of the present invention, the coil assembly 400 is mounted on the valve body assembly 100 and is used to overcome the elastic force of the return spring 300 to drive the valve core assembly 200 to move.

[0029] like Figure 7 As shown, in some embodiments of this utility model, the isolation zone shock-absorbing pad 510 is arranged in the isolation zone 1032 to reduce the impact of the valve core assembly 200 on the valve body assembly 100 when the valve core assembly 200 opens the air passage between the air inlet 101 and the air outlet 102 (i.e., connects the air inlet 101 and the air outlet 102).

[0030] like Figure 7 As shown, in some embodiments of this utility model, the connecting area damping pad 520 is arranged in the inlet and outlet connecting area 1031 to reduce the impact of the valve core assembly 200 on the valve body assembly 100 when the valve core assembly 200 blocks the air passage between the air inlet 101 and the air outlet 102 (i.e., disconnects the air inlet 101 and the air outlet 102).

[0031] In other embodiments of this utility model, those skilled in the art can, as needed, open the air passage between the air inlet 101 and the air outlet 102 under the action of the return spring 300, and block the air passage between the air inlet 101 and the air outlet 102 under the action of the coil assembly 400.

[0032] In other embodiments of this utility model, those skilled in the art may omit the coil assembly 400 as needed, and the user may select the coil assembly 400 when using the solenoid valve 001.

[0033] Based on the foregoing description, those skilled in the art will understand that by arranging the isolation zone damping pad 510 in the isolation zone 1032, the impact of the valve core assembly 200 on the valve body assembly 100 can be reduced when the valve core assembly 200 opens the air passage between the air inlet 101 and the air outlet 102, thereby reducing the noise of the solenoid valve 001 during operation and improving the user experience.

[0034] Furthermore, by arranging a shock-absorbing pad 520 in the inlet and outlet connecting area 1031, the impact of the valve core assembly 200 on the valve body assembly 100 can be reduced when the valve core assembly 200 blocks the air passage between the air inlet 101 and the air outlet 102, effectively overcoming the problem of sealing failure between the valve core assembly 200 and the valve body assembly 100.

[0035] In other embodiments of this utility model, those skilled in the art may omit the installation of the isolation zone shock-absorbing pad 510 as needed.

[0036] In other embodiments of this utility model, those skilled in the art may omit the reset spring 300 as needed and configure a permanent magnet for the valve core assembly 200 to open the air passage between the air inlet 101 and the air outlet 102 through the coil assembly 400, and to block the air passage between the air inlet 101 and the air outlet 102.

[0037] The following reference Figures 1 to 11 The electromagnetic valve 001 in this utility model will be described in further detail below.

[0038] like Figure 1 , Figure 2 , Figures 5 to 7 As shown, in some embodiments of this utility model, the valve body assembly 100 includes a valve nozzle 110, a connecting pipe 120, a magnetic ring pipe 130, a magnetic shielding pipe 140, and a stationary iron core 150 arranged sequentially. Any two adjacent valve nozzles 110, connecting pipes 120, magnetic ring pipes 130, magnetic shielding pipes 140, and stationary iron core 150 are fixedly connected or integrally formed.

[0039] Among them, the fixed connection can be any feasible connection method such as welding, interference fit, threaded connection, etc.

[0040] from Figure 1 , Figure 2 , Figures 5 to 7 As can be seen, the air inlet 101 is formed on the valve nozzle 110, and the air outlet 102 is formed on the connecting pipe 120. The valve nozzle 110, the connecting pipe 120, the magnetic ring pipe 130, the magnetic shielding pipe 140, and the stationary iron core 150 together define the receiving cavity 103.

[0041] In addition, in other embodiments of this utility model, those skilled in the art may, as needed, form the air inlet 101 on the connecting pipe 120 and the air outlet 102 on the valve nozzle 110.

[0042] like Figure 1 and Figure 7 As shown, in some embodiments of this utility model, the stationary iron core 150 abuts against the return spring 300. Specifically, the stationary iron core 150 is also provided with a spring positioning hole 151 to accommodate a portion of the return spring 300 and prevent the return spring 300 from being misaligned.

[0043] like Figure 1 , Figure 2 and Figure 7As shown, in some embodiments of this utility model, the valve body assembly 100 further includes a stop ring 160, which is clamped by the connecting pipe 120 and the magnetic ring pipe 130 in the moving direction of the valve core assembly 200 to achieve fixation. Alternatively, those skilled in the art can also use any other feasible fixing method as needed to fix the stop ring 160 to the connecting pipe 120 or the magnetic ring pipe 130, such as welding. For another example, an annular groove can be provided on the connecting pipe 120 or the magnetic ring pipe 130, and the stop ring 160 can be embedded in the annular groove.

[0044] like Figure 7 As shown, the stop ring 160 and the valve core assembly 200 together clamp the communication area damping pad 520 so that when the valve core assembly 200 moves toward the air inlet 101, the valve core assembly 200 and the valve body assembly 100 can squeeze the communication area damping pad 520, thereby reducing the impact of the valve core assembly 200 on the valve body assembly 100.

[0045] Furthermore, in other embodiments of this utility model, while ensuring that the valve core assembly 200 and the valve body assembly 100 compress the shock-absorbing pad 520 in the communication area, those skilled in the art can omit the stop ring 160 as needed. For example, an inwardly protruding annular shoulder can be provided on the connecting pipe 120 to abut against the shock-absorbing pad 520 in the communication area.

[0046] like Figure 1 , Figure 2 , Figures 7 to 9 As shown, in some embodiments of this utility model, the outer peripheral surface of the valve core assembly 200 includes a planar region 201, such that the planar region 201 and the peripheral wall of the receiving cavity 103 define an airflow channel 104 that connects the inlet / outlet communication area 1031 and the isolation area 1032 (e.g., Figure 8 As shown), the air pressure between the inlet / outlet connecting area 1031 and the isolation area 1032 is balanced through the airflow channel 104.

[0047] like Figure 1 , Figure 2 , Figure 7 and Figure 9 As shown, in some embodiments of this utility model, the valve core assembly 200 includes a moving iron core 210, a valve plug 220, and a wear-resistant sleeve 230. The valve plug 220 is installed at the end of the moving iron core 210 away from the isolation zone 1032 to block the air passage between the air inlet 101 and the air outlet 102. The wear-resistant sleeve 230 is sleeved on the outside of the moving iron core 210 so that the moving iron core 210 slides in contact with the peripheral wall of the receiving cavity 103 through the wear-resistant sleeve 230.

[0048] The wear-resistant sleeve 230 can be made of wear-resistant and self-lubricating materials, such as polytetrafluoroethylene, nylon, ceramics, etc. The wear-resistant sleeve 230 can also be a coating applied to the moving iron core 210.

[0049] from Figure 7 As can be seen, the moving iron core 210 is provided with an annular groove (not marked in the figure), and the valve plug 220 is sleeved on the moving iron core 210 and is provided with an inner annular protrusion (not marked in the figure), which is embedded in the annular groove.

[0050] like Figure 2 , Figure 7 and Figure 9 As shown, in some embodiments of this utility model, a blind hole 211 is provided on the side of the moving iron core 210 away from the valve plug 220. The blind hole 211 accommodates a part of the return spring 300 to prevent the return spring 300 from being misaligned.

[0051] from Figure 1 , Figure 2 , Figure 7 and Figure 9 As can be seen, the planar region 201 is formed on the wear-resistant sleeve 230. Correspondingly, the moving iron core 210 is also machined with a planar surface to fit the planar region 201.

[0052] Those skilled in the art will understand that the planar region 201 is also designed to prevent the wear-resistant sleeve 230 from rotating relative to the moving iron core 210.

[0053] Furthermore, there are multiple planar regions 201, which are symmetrically distributed with respect to the axis center of the moving iron core 210, so that the center of mass of the valve core assembly 200 basically coincides with the axis of the moving iron core 210.

[0054] like Figure 1 , Figure 2 , Figures 7 to 9 As shown, in some embodiments of this utility model, the valve core assembly 200 is provided with an annular abutment surface 202 facing away from the isolation zone 1032. The stop ring 160 is located on the side of the abutment surface 202 away from the isolation zone 1032, and the communication zone damping pad 520 is an annular component disposed between the abutment surface 202 and the stop ring 160.

[0055] Furthermore, in other embodiments of this utility model, those skilled in the art can also, as needed, set the outer peripheral contour and / or inner peripheral contour of the isolation zone damping pad 510 to a star shape or a polygon. For example, Figure 10 As shown, the outer periphery of the isolation zone damping pad 510 is star-shaped, and the inner periphery of the isolation zone damping pad 510 is polygonal.

[0056] like Figure 5As shown, in some embodiments of this utility model, the coil assembly 400 includes an electromagnetic coil 410, a coil support 420, and a coil housing 430. The electromagnetic coil 410 is mounted on the coil support 420, and the coil housing 430 is sleeved on the outside of the electromagnetic coil 410 and the coil support 420. The electromagnetic coil 410 is mounted on the valve body assembly 100 via the coil support 420.

[0057] like Figure 1 , Figure 2 , Figure 7 and Figure 9 As shown, in some embodiments of this utility model, the isolation zone damping pad 510 is configured as an annular shape to avoid the return spring 300.

[0058] like Figure 11 As shown, the isolation zone damping pad 510 is a component made of porous polymer material, so that the elastic modulus of the isolation zone damping pad 510 is smaller in the initial stage of compression and larger in the final stage of compression, thereby reducing the impact of the valve core assembly 200 on the valve body assembly 100 while ensuring the response speed of the valve core assembly 200 movement.

[0059] Among them, porous polymer materials are foamed silicone, foamed PU, or foamed polypropylene.

[0060] from Figure 11 It can also be seen that, due to the hysteresis of the support reaction force of the porous polymer material during the retraction, the consumption of electromagnetic force can be reduced during the stationary process, thereby avoiding excessive current in the coil assembly 400.

[0061] like Figure 7 and Figure 9 As shown, in some embodiments of this utility model, the thickness L11 of the isolation zone damping pad 510 is less than or equal to the maximum axial length L12 of the isolation zone 1032, so as to avoid the isolation zone damping pad 510 generating an elastic force that hinders the movement of the valve core assembly 200 at the moment when the valve core assembly 200 is driven by the coil assembly 400.

[0062] Furthermore, the isolation zone damping pad 510 can be placed directly within the isolation zone 1032 without being fixedly connected to either the stationary iron core 150 or the moving iron core 210; it can also be bonded to the stationary iron core 150; or it can be bonded to the moving iron core 210.

[0063] Furthermore, in order to achieve air pressure balance between the inner and outer sides of the isolation zone damping pad 510, a flow guide groove can be opened on at least one of the opposite end faces of the stationary iron core 150 and the moving iron core 210.

[0064] like Figure 1 , Figure 2 , Figure 7 and Figure 9 As shown, in some embodiments of this utility model, the connecting area damping pad 520 is an annular component disposed between the abutment surface 202 and the stop ring 160.

[0065] Furthermore, in other embodiments of this utility model, those skilled in the art can also, as needed, set the outer and / or inner peripheral contours of the connecting area damping pad 520 to a star shape or a polygon. For details, please refer to the preceding description of the isolation area damping pad 510.

[0066] Furthermore, in order to achieve air pressure balance between the inner and outer sides of the shock-absorbing pad 520 in the connecting area, a flow-guiding groove can be opened on the contact surface 202.

[0067] like Figure 11 As shown, the connecting area damping pad 520 is a component made of porous polymer material, so that the elastic coefficient of the connecting area damping pad 520 is smaller in the initial stage of compression and larger in the final stage of compression, thereby reducing the impact of the valve core assembly 200 on the valve body assembly 100 while ensuring the response speed of the valve core assembly 200 blocking.

[0068] Among them, porous polymer materials are foamed silicone, foamed PU, or foamed polypropylene.

[0069] like Figure 7 and Figure 9 As shown, in some embodiments of this utility model, the thickness L21 of the connecting area damping pad 520 is less than or equal to the maximum axial length L22 of the connecting area, so as to avoid the connecting area damping pad 520 generating an elastic force that hinders the movement of the valve core assembly 200 at the moment when the valve core assembly 200 coil assembly 400 is de-energized and driven by the reset spring 300.

[0070] Furthermore, the shock-absorbing pad 520 in the connecting area can be placed directly in the connecting area without being fixedly connected to either the stop ring 160 or the moving iron core 210; it can also be bonded to the stop ring 160; or it can be bonded to the moving iron core 210.

[0071] Furthermore, the stop ring 160 is configured as an annular sheet structure, and the stop ring 160 can generate elastic deformation along the moving direction of the valve core assembly 200, so as to cooperate with the shock-absorbing pad 520 in the connecting area to absorb the kinetic energy of the valve core assembly 200 and reduce the impact of the valve core assembly 200 on the valve body assembly 100.

[0072] The following reference Figure 7 and Figure 9 The working principle of the solenoid valve 001 in some embodiments of this utility model will be briefly explained below.

[0073] like Figure 7As shown, when the solenoid valve 001 is de-energized, the solenoid coil 410 does not generate a magnetic field. The valve core assembly 200 abuts against the valve nozzle 110 under the action of the return spring 300, thereby blocking the air passage between the air inlet 101 and the air outlet 102. At the same time, the isolation zone damping pad 510 is in a free and uncompressed state, while the connecting zone damping pad 520 is compressed.

[0074] When solenoid valve 001 is energized, solenoid coil 410 generates a magnetic field, causing the stationary iron core 150 and moving iron core 210 to attract each other. This force overcomes the spring force of return spring 300, driving valve core assembly 200 via... Figure 7 Move the position to Figure 9 The position is shown. During this process, the isolation zone damping pad 510 is gradually compressed until the valve core assembly 200 stops moving. At the same time, the connecting zone damping pad 520 gradually returns to a free and uncompressed state.

[0075] like Figure 9 As shown, when the solenoid valve 001 is energized, the solenoid coil 410 generates a magnetic field, which causes the stationary iron core 150 and the moving iron core 210 to attract each other and move closer together, thus moving the valve core assembly 200 away from the valve nozzle 110 to open the air passage between the air inlet 101 and the air outlet 102. At the same time, the isolation zone damping pad 510 is compressed, while the connecting zone damping pad 520 is in a free and uncompressed state.

[0076] When solenoid valve 001 is de-energized, valve core assembly 200, under the action of return spring 300, via... Figure 9 Move the position to Figure 7 The position is shown. During this process, the connecting area damping pad 520 is gradually compressed until the valve core assembly 200 stops moving. At the same time, the isolation area damping pad 510 gradually returns to its free and uncompressed state.

[0077] Based on the foregoing description, those skilled in the art will understand that the solenoid valve 001 of this utility model not only weakens the impact of the valve core assembly 200 on the valve body assembly 100 and reduces the working noise of the solenoid valve 001, but also ensures the response speed of the valve core assembly 200, achieving unexpected technical effects.

[0078] Furthermore, the solenoid 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 a car.

[0079] 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.

[0080] Finally, it should be noted that in this invention, the term "connection" refers to fluid communication, allowing fluids (e.g., air, liquid) to flow between two interconnected entities. Furthermore, this "connection" can be either a leak-free flow of fluid between two interconnected entities, or a flow with slight leakage of fluid between two interconnected entities.

Claims

1. A solenoid valve, characterized in that, include: The valve body assembly defines an air inlet, an air outlet, and a receiving cavity; A valve core assembly is movably disposed in the receiving cavity and divides the receiving cavity into an inlet / outlet communication area and an isolation area. The inlet / outlet communication area is respectively connected to the air inlet and the air outlet. The valve core assembly is used to block the air passage between the air inlet and the air outlet. A shock-absorbing pad is arranged in the inlet / outlet connecting area to reduce the impact of the valve core assembly on the valve body assembly when the valve core assembly blocks the air passage between the air inlet and the air outlet.

2. The solenoid valve according to claim 1, characterized in that, The valve core assembly is provided with an annular contact surface that faces away from the isolation zone. The valve body assembly includes a stop ring located on the side of the contact surface away from the isolation zone. The shock-absorbing pad in the connecting area is an annular component disposed between the contact surface and the stop ring.

3. The solenoid valve according to claim 2, characterized in that, The valve body assembly also includes a valve nozzle, a connecting pipe, a magnetic ring pipe, a magnetic shielding pipe, and a stationary iron core arranged in sequence. Any two adjacent valve nozzles, the connecting pipe, the magnetic ring pipe, the magnetic shielding pipe, and the stationary iron core are fixedly connected or integrally formed. The stop ring is clamped by the connecting pipe and the magnetic ring pipe in the moving direction of the valve core assembly.

4. The solenoid valve according to claim 2, characterized in that, The stop ring is configured as an annular sheet structure, and the stop ring can elastically deform along the moving direction of the valve core assembly to cooperate with the shock-absorbing pad of the connecting area to absorb the kinetic energy of the valve core assembly and reduce the impact of the valve core assembly on the valve body assembly.

5. The solenoid valve according to claim 1, characterized in that, The outer peripheral surface of the valve core assembly includes a planar region, such that the planar region and the peripheral wall of the receiving cavity define an airflow channel that connects the inlet / outlet communication area and the isolation area, thereby balancing the air pressure between the inlet / outlet communication area and the isolation area through the airflow channel.

6. The solenoid valve according to claim 1, characterized in that, The valve core assembly includes a moving iron core, a valve plug, and a wear-resistant sleeve. The valve plug is installed at the end of the moving iron core away from the isolation zone to block the air passage between the air inlet and the air outlet; The wear-resistant sleeve is fitted over the outside of the moving iron core so that the moving iron core slides in contact with the peripheral wall of the receiving cavity through the wear-resistant sleeve.

7. The solenoid valve according to any one of claims 1 to 6, characterized in that, The connecting area damping pad is a component made of porous polymer material, so that the elastic coefficient of the connecting area damping pad is small in the initial stage of compression and large in the final stage of compression, thereby reducing the impact of the valve core assembly on the valve body assembly while ensuring the response speed of the valve core assembly to block.

8. The solenoid valve according to claim 7, characterized in that, The porous polymer material is foamed silicone, foamed PU, or foamed polypropylene; and / or... The thickness of the shock-absorbing pad in the connecting area is less than or equal to the maximum axial length of the inlet and outlet connecting area.

9. The solenoid valve according to any one of claims 1 to 6, characterized in that, The connecting area damping pad is configured as an annular shape, and the outer and / or inner peripheral contours of the connecting area damping pad are configured as star-shaped or polygonal.

10. The solenoid valve according to any one of claims 1 to 6, characterized in that, The solenoid valve also includes a return spring, which is disposed between the valve body assembly and the valve core assembly to drive the valve core assembly to block the air passage between the air inlet and the air outlet.

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