solenoid valve

Abstract

The utility model belongs to the technical field of electromagnetic valve, specifically provides a kind of electromagnetic valve.The utility model aims at solving the problem of higher cost caused by the bidirectional movement of the valve core assembly being buffered and damped by two buffer structures of existing electromagnetic valve.To this end, the electromagnetic valve of the utility model includes valve body assembly, valve core assembly and buffer member.Valve body assembly is defined with air inlet, air outlet and accommodating cavity.Valve core assembly is movably arranged in accommodating cavity, and accommodating cavity is divided into inlet and outlet communication zone and isolated area, and inlet and outlet communication zone is communicated with air inlet and air outlet respectively.Buffer member is arranged in inlet and outlet communication zone and is set to annularly.Wherein, valve body assembly is provided with inner ring groove, valve core assembly is provided with outer ring groove, the outer circumferential end of buffer member is embedded in inner ring groove, and the inner circumferential end of buffer member is embedded in outer ring groove, to slow down the impact of valve core assembly to valve body assembly by buffer member.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] To prevent the valve core assembly from causing rigid impacts to the valve body assembly during movement, existing solenoid valves typically incorporate a cushioning structure. For example, rubber dampers are placed on the valve core assembly or valve body assembly to mitigate the impact. Another example is the placement of a compression spring between the valve core assembly and the valve body assembly to further reduce the impact.

[0004] However, existing buffer structures can only act on the unidirectional movement of the valve core assembly. If both bidirectional movement of the valve core assembly needs to be buffered and damped, two buffer structures are required for the solenoid valve, which is costly. Utility Model Content

[0005] One objective of this invention is to solve the problem that existing solenoid valves require two buffer structures to buffer and dampen the bidirectional movement of the valve core assembly, resulting in high costs.

[0006] 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 open and block the air passage between the air inlet and the air outlet. A buffer component is arranged in the inlet / outlet communication area and configured as a ring. The valve body assembly is provided with an inner annular groove, the valve core assembly is provided with an outer annular groove, the outer peripheral end of the buffer member is embedded in the inner annular groove, and the inner peripheral end of the buffer member is embedded in the outer annular groove, so as to reduce the impact of the valve core assembly on the valve body assembly through the buffer member.

[0007] Optionally, the buffer member includes an inner ring and an outer cantilever disposed radially outside the inner ring; the inner ring is fitted into the outer ring groove, and the outer cantilever is fitted into the inner ring groove.

[0008] Optionally, the outer cantilever is slidably connected to the outer annular groove in the radial direction, so that the outer cantilever deforms to adapt to the displacement of the valve core assembly.

[0009] Optionally, the plurality of outer cantilevers are distributed at equal intervals along the circumference of the inner ring to prevent the valve core assembly from becoming eccentric.

[0010] Optionally, both the inner ring and the outer cantilever are sheet-like structures.

[0011] Optionally, the thickness of the inner ring and / or the outer cantilever is less than or equal to 2 mm.

[0012] Optionally, the buffer member is a sheet-like bistable elastic structure, so that the valve core assembly generates two elastic forces in opposite directions during movement, thereby hindering the bidirectional movement of the valve core assembly.

[0013] Optionally, the solenoid valve further includes an elastic member disposed in the inlet / outlet isolation zone and comprising a base and a plurality of elastic arms fixedly connected to or integrally formed with the base; one of the base and the elastic arms abuts against the valve body assembly in the axial direction of the valve core assembly, and the other of the base and the elastic arm abuts against the valve core assembly in the axial direction of the valve core assembly, so that the elastic member drives the valve core assembly through the elastic arms to block the air passage between the air inlet and the air outlet.

[0014] Optionally, the base abuts against the valve body assembly, and the elastic arm abuts against the valve core assembly; each of the elastic arms extends outward from the base along the radial direction of the valve core assembly, and extends away from the base in the axial direction of the valve core assembly, to prevent the valve core assembly from becoming eccentric and jamming.

[0015] Optionally, the solenoid valve is suitable for adjusting the stiffness of the air spring.

[0016] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, by providing an inner annular groove on the valve body assembly and an outer annular groove on the valve core assembly, and by embedding the outer peripheral end of the buffer member in the inner annular groove and the inner peripheral end of the buffer member in the outer annular groove, the impact of the valve core assembly on the valve body assembly can be mitigated by the buffer member. Simultaneously, since the buffer member is axially fixedly connected to both the valve body assembly and the valve core assembly, it can mitigate the impact on the valve body assembly even when the valve core assembly moves in either direction. Compared to the prior art that uses two buffer structures to buffer and dampen the bidirectional movement of the valve core assembly, this effectively reduces the cost of the solenoid valve.

[0017] Furthermore, by making the outer cantilever of the buffer member slide in the radial direction with the outer annular groove, the outer cantilever can generate deformation to adapt to the displacement of the valve core assembly, thus ensuring the buffer member's hindering effect on the movement of the valve core assembly.

[0018] Furthermore, by setting the buffer member as a sheet-like bistable elastic structure, the valve core assembly can generate two elastic forces in opposite directions during movement, ensuring that the buffer member hinders the bidirectional movement of the valve core assembly. At the same time, it also avoids increasing the current when the solenoid valve is energized.

[0019] 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

[0020] 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 6This is a perspective view of the solenoid valve in some embodiments of this utility model (the coil assembly is hidden). Figure 7 yes Figure 4 A 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 perspective view of the elastic component in some embodiments of this utility model; Figure 11 This is a graph showing the elastic force-deformation variation trend of the elastic component in some embodiments of this utility model; Figure 12 This is a perspective view of the buffer component in some embodiments of this utility model; Figure 13 This is a graph showing the elastic force-deformation trend of the buffer component in some embodiments of this utility model.

[0021] 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. Inlet / outlet isolation area; 104. Inner annular groove; 105. Airflow guide channel; 110. Valve nozzle; 120. Connecting pipe; 130. Magnetic guide ring tube; 140. Magnetic shielding tube; 150. Static iron core; 151. Annular groove; 160. Permanent magnet; 200. Valve core assembly; 201. Outer annular groove; 202. Planar area; 210. Moving iron core; 220. Valve plug; 230. Wear-resistant sleeve; 300. Coil assembly; 310. Electromagnetic coil; 320. Coil support; 330. Coil housing; 400, Elastic component; 410, Matrix; 420, Elastic arm; 500. Buffer component; 510. Inner ring; 520. Outer cantilever; o, axial direction; r, radial direction; z, circumferential direction. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Furthermore, it should be noted that in the description of this utility model, mm represents millimeter, cm represents centimeter, and m represents meter.

[0026] like Figures 1 to 7 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 coil assembly 300, an elastic member 400, and a buffer member 500.

[0027] like Figure 1 , Figure 3 , Figure 6 and Figure 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.

[0028] 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 inlet / outlet 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 control the opening and closing of the air passage between the air inlet 101 and the air outlet 102.

[0029] like Figures 1 to 5 As shown, in some embodiments of the present invention, the coil assembly 300 is mounted on the valve body assembly 100 and is used to drive the valve core assembly 200 to move.

[0030] like Figure 1 , Figure 2 and Figure 7 As shown, in some embodiments of this utility model, the elastic member 400 is arranged in the inlet / outlet isolation zone 1032 and includes a base 410 and a plurality of elastic arms 420 fixedly connected to or integrally formed with the base 410. One of the base 410 and the elastic arm 420 abuts against the valve body assembly 100 in the axial direction o of the valve core assembly 200, and the other of the base 410 and the elastic arm 420 abuts against the valve core assembly 200 in the axial direction o of the valve core assembly 200, so that the elastic member 400 drives the valve core assembly 200 through the elastic arm 420 to block the air passage between the air inlet 101 and the air outlet 102.

[0031] When the valve core assembly 200 opens the air passage between the air inlet 101 and the air outlet 102, the air inlet 101 and the air outlet 102 are connected. When the valve core assembly 200 blocks the air passage between the air inlet 101 and the air outlet 102, the air inlet 101 and the air outlet 102 are blocked by the valve core assembly 200.

[0032] from Figure 2 , Figure 7 and Figure 9 As shown, the side of the valve core assembly 200 facing the stationary iron core 150 is a continuous plane to increase the magnetic conductivity of the valve core assembly 200.

[0033] like Figure 7 As shown, in some embodiments of this utility model, the buffer member 500 is arranged in the inlet / outlet communication area 1031 and is configured as a ring.

[0034] like Figure 7 and Figure 8As shown, in some embodiments of this utility model, the valve body assembly 100 is provided with an inner annular groove 104, the valve core assembly 200 is provided with an outer annular groove 201, the outer peripheral end of the buffer member 500 is embedded in the inner annular groove 104, and the inner peripheral end of the buffer member 500 is embedded in the outer annular groove 201, so as to reduce the impact of the valve core assembly 200 on the valve body assembly 100 through the buffer member 500.

[0035] Those skilled in the art will understand that by arranging an elastic member 400 within the inlet / outlet isolation zone 1032 between the valve core assembly 200 and the valve body assembly 100, and by having the elastic member 400 have a base 410 and multiple elastic arms 420 fixedly connected to or integrally formed with the base 410, respectively abutting against the valve core assembly 200 and the valve body assembly 100 in the axial direction o, the need for a helical compression spring between the valve core assembly 200 and the valve body assembly 100 is avoided, thereby avoiding the need for a locking hole on the valve core assembly 200. Therefore, this invention enables the end face of the valve core assembly 200 facing the inlet / outlet isolation zone 1032 to have the same magnetic conductivity, increasing the magnetic conductivity area of ​​the valve core assembly 200.

[0036] Furthermore, by providing an inner annular groove 104 on the valve body assembly 100 and an outer annular groove 201 on the valve core assembly 200, and by embedding the outer peripheral end of the buffer member 500 within the inner annular groove 104 and the inner peripheral end of the buffer member 500 within the outer annular groove 201, the buffer member 500 can mitigate the impact of the valve core assembly 200 on the valve body assembly 100. Simultaneously, since the buffer member 500 is fixedly connected to both the valve body assembly 100 and the valve core assembly 200 in the axial direction o, it can mitigate the impact of the valve core assembly 200 moving in either direction. Compared to the prior art that uses two buffer structures to buffer and dampen the bidirectional movement of the valve core assembly 200, this effectively reduces the cost of the solenoid valve 001.

[0037] In addition, those skilled in the art can, as needed, set the elastic member 400 to any other feasible structure, such as a compression spring, a tension spring, etc., in other embodiments of this utility model.

[0038] Furthermore, in other embodiments of this utility model, those skilled in the art may omit the coil assembly 300 as needed, and the user may select and equip the coil assembly 300 when using the solenoid valve 001.

[0039] The following reference Figures 1 to 13 The electromagnetic valve 001 in this utility model will be described in further detail below.

[0040] like Figure 1 , Figure 2 , Figures 5 to 7As 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.

[0041] Among them, the fixed connection can be any feasible connection method such as welding, interference fit, threaded connection, etc.

[0042] from Figures 1 to 3 , 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.

[0043] from Figures 7 to 9 As can be seen, in some embodiments of this utility model, the outer annular groove 201 is formed between the connecting pipe 120 and the magnetic ring pipe 130. In other words, the outer annular groove 201 is defined by both the connecting pipe 120 and the magnetic ring pipe 130.

[0044] 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.

[0045] like Figure 1 , Figure 2 and Figure 7 As shown, in some embodiments of this utility model, the valve body assembly 100 further includes a permanent magnet 160.

[0046] from Figure 7 As can be seen, the stationary iron core 150 is located on the side of the inlet / outlet isolation zone 1032 away from the valve core assembly 200, and an annular groove 151 is provided on the side facing the valve core assembly 200 (e.g., Figure 1 As shown, the permanent magnet 160 is embedded in the annular groove 151.

[0047] In some embodiments of this invention, the permanent magnet 160 attracts the valve core assembly 200 when the valve core assembly 200 compresses the elastic member 400, thereby counteracting part of the elastic force of the elastic member 400.

[0048] Those skilled in the art will understand that, because the permanent magnet 160 can counteract part of the elastic force of the elastic member 400, it can assist the electromagnetic force in overcoming the elastic force of the elastic member 400 when the coil assembly 300 drives the valve core assembly 200 to open the air passage between the air inlet 101 and the air outlet 102. Therefore, the electromagnetic force of the coil assembly 300 can be reduced, thereby reducing the current of the coil assembly 300 and lowering the energy consumption and heat generated by the solenoid valve 001.

[0049] Furthermore, in some embodiments of this utility model, the permanent magnet 160 can be a ferrite magnet, a samarium cobalt magnet, a neodymium iron boron magnet, an alnico magnet, etc.

[0050] like Figure 1 , Figure 2 , Figures 7 to 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.

[0051] The moving iron core 210 has an outer annular groove 201 to fix the buffer member 500. The moving iron core 210 is also provided with an annular groove (not marked in the figure) for fixing the valve plug 220, and the valve plug 220 is provided with an inner annular protrusion (not marked in the figure), which is embedded in the annular groove.

[0052] The wear-resistant sleeve 230 is fitted 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.

[0053] 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.

[0054] from Figure 1 , Figure 2 , Figure 7 and Figure 9 As can be seen, a planar region 202 is formed on the wear-resistant sleeve 230. Correspondingly, a planar surface is machined on the moving iron core 210 to fit the planar region 202.

[0055] Furthermore, there are multiple planar regions 202, 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.

[0056] from Figures 7 to 9 As can be seen from the above, in some embodiments of this utility model, the planar region 202 and the peripheral wall of the receiving cavity 103 define an airflow channel 105 that connects the inlet / outlet communication area 1031 and the inlet / outlet isolation area 1032 (e.g., Figure 8As shown in the figure, the air pressure between the inlet / outlet connecting area 1031 and the inlet / outlet isolation area 1032 is balanced by the airflow channel 105.

[0057] like Figure 5 As shown, in some embodiments of this utility model, the coil assembly 300 includes an electromagnetic coil 310, a coil support 320, and a coil housing 330. The electromagnetic coil 310 is mounted on the coil support 320, and the coil housing 330 is sleeved on the outside of the electromagnetic coil 310 and the coil support 320. The electromagnetic coil 310 is mounted on the valve body assembly 100 via the coil support 320.

[0058] like Figure 7 , Figure 9 and 10 As shown, in some embodiments of this utility model, each elastic arm 420 of the elastic member 400 extends outward from the base 410 along the radial direction r of the valve core assembly 200, and extends in the axial direction o of the valve core assembly 200 in a direction away from the base 410 (e.g. Figure 7 As shown, a three-dimensional elastic support is formed between the valve body assembly 100 and the valve core assembly 200.

[0059] like Figure 7 and Figure 9 As shown, in some embodiments of this utility model, the base 410 abuts against the valve body assembly 100, and the elastic arm 420 abuts against the valve core assembly 200.

[0060] Those skilled in the art will understand that the three-dimensional elastic support allows the contact points between each elastic arm 420 and the moving iron core 210 to be further away from the axis of the moving iron core 210, thereby effectively preventing radial eccentricity and tilting of the valve core assembly 200 during movement.

[0061] In addition, those skilled in the art can, as needed, arrange the base 410 to abut against the valve core assembly 200 and the elastic arm 420 to abut against the valve body assembly 100 in other embodiments of the present invention.

[0062] from Figure 7 and Figure 9 As can be seen, the substrate 410 is located inside the annular groove 151 in the radial direction r of the valve core assembly 200 to prevent the substrate 410 from contacting the permanent magnet 160 and squeezing the permanent magnet 160, thus avoiding the substrate 410 from crushing the permanent magnet 160.

[0063] like Figure 10 As shown, in some embodiments of this utility model, multiple elastic arms 420 are arranged at equal intervals along the circumferential z-axis of the base 410 to prevent the valve core assembly 200 from becoming eccentric and jamming.

[0064] from Figure 10As can be seen, both the substrate 410 and the elastic arm 420 are sheet-like structures, and the thickness D1 of the substrate 410 and / or the elastic arm 420 is less than or equal to 1 mm. The specific thickness of the substrate 410 and the elastic arm 420 can be any feasible value such as 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm, 0.8 mm, 1 mm, etc.

[0065] Furthermore, the elastic component 400 is a component made of a non-magnetic material, specifically austenitic stainless steel, copper alloy, titanium alloy, polyetheretherketone, etc.

[0066] Figure 10 The elastic properties of the elastic member 400 shown are as follows: Figure 11 As shown. In Figure 11 The horizontal axis S represents the deformation of the elastic member 400, and the vertical axis F represents the elastic force generated by the elastic member 400. From... Figure 11 As can be seen, in the initial stage of the deformation of the elastic member 400, the change in elastic force is relatively stable, basically linear. In the final stage of the deformation of the elastic member 400, the change in elastic force suddenly increases. The permanent magnet 160 in this invention can precisely offset at least a portion of the suddenly increased elastic force, preventing excessive current in the coil assembly 300.

[0067] from Figure 12 As shown, in some embodiments of this utility model, the buffer member 500 includes an inner ring 510 and an outer cantilever 520 disposed radially outside the inner ring 510. The inner ring 510 is fitted into the outer ring groove 201 of the valve core assembly 200, and the outer cantilever 520 is fitted into the inner ring groove 104 of the valve body assembly 100 to fix the buffer member 500.

[0068] like Figure 7 and Figure 9 In some embodiments of this utility model, the outer cantilever 520 is slidably connected to the outer annular groove 201 in the radial direction r, so that the outer cantilever 520 can deform to adapt to the displacement of the valve core assembly 200.

[0069] Furthermore, multiple outer cantilevers 520 are evenly distributed along the circumferential z-axis of the inner ring 510 to prevent the valve core assembly 200 from becoming eccentric.

[0070] from Figure 12 As can be seen, both the inner ring 510 and the outer cantilever 520 are sheet-like structures, and the thickness D2 of the inner ring 510 and / or the outer cantilever 520 is less than or equal to 2 mm. The specific thickness of the inner ring 510 and the outer cantilever 520 can be any feasible value such as 0.3 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, or 2 mm.

[0071] Furthermore, the buffer member 500 is a sheet-like bistable elastic structure, so that the valve core assembly 200 generates two elastic forces in opposite directions during movement, thereby hindering the bidirectional movement of the valve core assembly 200.

[0072] Figure 12 The elastic properties of the buffer member 500 shown are as follows: Figure 13 As shown. In Figure 13 The horizontal axis S represents the deformation of the buffer component 500, and the vertical axis F represents the elastic force generated by the buffer component 500. Figure 13 The 0 point on the horizontal axis represents the critical point of the 500 bidirectional elastic force of the buffer component. From Figure 13 As can be seen, the elastic force of the buffer component 500 is the largest near the 0 point of the horizontal axis, and varies considerably.

[0073] 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.

[0074] like Figure 7 As shown, when the solenoid valve 001 is de-energized, the solenoid coil 310 does not generate a magnetic field. The valve plug 220 of the valve core assembly 200 abuts against the valve nozzle 110 under the action of the elastic member 400, thereby blocking the air passage between the air inlet 101 and the air outlet 102.

[0075] When solenoid valve 001 is energized, solenoid coil 310 generates a magnetic field, causing the stationary iron core 150 and moving iron core 210 to attract each other. This force overcomes the elastic force of elastic member 400, driving valve core assembly 200 via... Figure 7 Move the position to Figure 9 The position is shown. During this process, the elastic force of the buffer member 500 first gradually increases, then suddenly changes direction, and then gradually decreases.

[0076] like Figure 9 As shown, when the solenoid valve 001 is energized, the solenoid coil 310 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, and moves the valve core assembly 200 away from the valve nozzle 110, so as to open the air passage between the air inlet 101 and the air outlet 102.

[0077] When solenoid valve 001 is de-energized, valve core assembly 200, under the action of elastic member 400, via... Figure 9 Move the position to Figure 7 The position is shown. During this process, the elastic force of the buffer member 500 first gradually increases, then suddenly changes direction, and then gradually decreases.

[0078] 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 increases the magnetic conductive area of ​​the valve core assembly 200.

[0079] 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.

[0080] 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 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 open and block the air passage between the air inlet and the air outlet. A buffer component is arranged in the inlet / outlet communication area and configured as a ring. The valve body assembly is provided with an inner annular groove, the valve core assembly is provided with an outer annular groove, the outer peripheral end of the buffer member is embedded in the inner annular groove, and the inner peripheral end of the buffer member is embedded in the outer annular groove, so as to reduce the impact of the valve core assembly on the valve body assembly through the buffer member.

2. The solenoid valve according to claim 1, characterized in that, The buffer component includes an inner ring and an outer cantilever disposed radially outside the inner ring; The inner ring is fitted into the outer ring groove, and the outer cantilever is fitted into the inner ring groove.

3. The solenoid valve according to claim 2, characterized in that, The outer cantilever is slidably connected to the outer annular groove in the radial direction, so that the outer cantilever deforms to adapt to the displacement of the valve core assembly.

4. The solenoid valve according to claim 2, characterized in that, The multiple outer cantilevers are evenly spaced along the circumference of the inner ring to prevent the valve core assembly from becoming eccentric.

5. The solenoid valve according to claim 2, characterized in that, Both the inner ring and the outer cantilever are sheet-like structures.

6. The solenoid valve according to claim 2, characterized in that, The thickness of the inner ring and / or the outer cantilever is less than or equal to 2 mm.

7. The solenoid valve according to any one of claims 1 to 6, characterized in that, The buffer component is a sheet-like bistable elastic structure, which causes the valve core assembly to generate two elastic forces in opposite directions during movement, thereby hindering the bidirectional movement of the valve core assembly.

8. The solenoid valve according to any one of claims 1 to 6, characterized in that, The solenoid valve also includes an elastic component. The elastic member is arranged in the inlet and outlet isolation area and includes a base and a plurality of elastic arms that are fixedly connected to or integrally formed with the base; One of the base and the elastic arm abuts against the valve body assembly in the axial direction of the valve core assembly, and the other of the base and the elastic arm abuts against the valve core assembly in the axial direction of the valve core assembly, so that the elastic member drives the valve core assembly through the elastic arm to block the air passage between the air inlet and the air outlet.

9. The solenoid valve according to claim 8, characterized in that, The base abuts against the valve body assembly, and the elastic arm abuts against the valve core assembly; Each of the elastic arms extends radially outward from the base of the valve core assembly and extends axially away from the base of the valve core assembly to prevent the valve core assembly from becoming eccentric and jamming.

10. The solenoid valve according to any one of claims 1 to 6, characterized in that, The solenoid valve is used to adjust the stiffness of the air spring.

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