solenoid valve

Abstract

The utility model belongs to solenoid valve technical field, specifically provides a solenoid valve. The utility model aims at solving the problem that the solenoid valve of existing solenoid valve is easy to lead to the sealing failure between valve core and valve body because of the greater impact of valve core to valve body. For this purpose, the solenoid valve of the utility model includes valve body and valve core. Valve body is limited to air inlet, air outlet and accommodating cavity, and includes the abutment ring that protrudes to air inlet or air outlet in accommodating cavity along the axial direction of valve body;The circumferential wall of accommodating cavity includes damping section. Valve core is movably arranged in accommodating cavity, and the valve plug of valve core includes end face sealing portion, sleeve joint part and at least one damping part. End face sealing portion is used to adapt with abutment ring to realize the on-off of air passage between air inlet and air outlet. Sleeve joint part is sleeved on the moving iron core. Damping part and damping section slide contact to generate the damping force that hinders the movement of valve core along its axial direction. The solenoid valve with the above structure of 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. By moving its internal valve core, 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 and a valve core. The valve core moves within the valve body 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 and valve body are sealed together. However, because the valve core moves at a very high speed, the impact force between the valve core and the valve body is very large, which can easily lead to the failure of the seal between the valve core and the valve body 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 and the valve body due to the large impact force of the valve core on the valve body.

[0005] To achieve the above objectives, this utility model provides a solenoid valve, comprising: A valve body defines an air inlet, an air outlet, and a receiving cavity, and includes an abutment ring that protrudes into the receiving cavity along the axial direction of the valve body from the air inlet or the air outlet; the peripheral wall of the receiving cavity includes a damping section; A valve core is movably disposed within the receiving cavity, the valve core comprising a moving iron core and a valve plug; the valve plug comprising: The end face sealing part selectively abuts against the abutment ring as the valve core moves, thereby realizing the opening and closing of the air passage between the air inlet and the air outlet; The sleeve is fitted onto the moving iron core; At least one damping portion protrudes radially outward from the sleeve portion, the damping portion slides in contact with the damping section, and the damping portion is deformed by the damping section in the radial direction to generate a damping force that hinders the valve core from moving axially.

[0006] Optionally, the outer diameter of the sleeve portion is equal along the axial direction from the end face sealing portion to the damping portion; and / or, the end face sealing portion and the damping portion are respectively disposed at the two axial ends of the sleeve portion.

[0007] Optionally, there are multiple damping sections, which are distributed circumferentially along the valve plug to allow gas to flow axially from between two adjacent damping sections along the valve plug.

[0008] Optionally, all the damping portions are distributed at equal intervals along the circumference of the valve plug to ensure the concentricity of the valve core and the valve body; and / or, the number of the damping portions is selected from any value from 2 to 8.

[0009] Optionally, the axial thickness of the damping portion gradually increases toward the axis of the valve core to prevent the damping portion from tipping over during the movement of the valve core.

[0010] Optionally, the damping portion includes an inlet / outlet proximal face near the air inlet and an inlet / outlet distal face away from the abutment ring; the inlet / outlet proximal face extends toward the abutment ring in a direction close to the valve core axis to prevent the damping portion from tilting toward the abutment ring; the moving iron core has an abutment surface facing the abutment ring, and the inlet / outlet distal face abuts against the abutment surface to prevent the damping portion from tilting away from the abutment ring.

[0011] Optionally, the inlet / outlet near-end face includes an outer arc surface and an inner arc surface, the outer arc surface being located outside the inner arc surface in the radial direction; the outer arc surface is bent toward the side away from the abutment ring; the inner arc surface is bent toward the side closer to the abutment ring.

[0012] Optionally, the ratio of the radius of the inner arc surface to the radius of the outer arc surface is selected from any value from 1.5 to 3.

[0013] Optionally, the damping part slides on the damping section for a shorter distance than the valve core moves, and the damping part slides out of the damping section when the valve core fully opens the air passage between the air inlet and the air outlet, so as to improve the response speed of the valve core when opening the air passage between the air inlet and the air outlet.

[0014] Optionally, the valve body 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 air inlet is formed on the valve nozzle, and the air outlet and the damping section are formed on the connecting pipe.

[0015] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, the valve plug of the valve core is fixed to the moving iron core by means of a sleeve portion. By providing a damping portion on the valve plug and a damping section on the valve body, and by making the damping portion slide in contact with the damping section, and by making the damping portion deformed by being squeezed radially by the damping section, a damping force is generated that hinders the axial movement of the valve core, effectively slowing down the movement speed of the valve core, thereby reducing the impact force of the valve core on the valve body, and effectively avoiding the problem of sealing failure between the valve core and the valve body.

[0016] 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

[0017] 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 (first axonometric view) of the solenoid valve in some embodiments of this utility model. Figure 4 This is a perspective view (second axonometric view) of the solenoid valve in some embodiments of this utility model. Figure 5 yes Figure 4 A cross-sectional view of the solenoid valve along the AA direction (closed state); Figure 6 yes Figure 4 A cross-sectional view of the solenoid valve along the AA direction (open state with the coil assembly hidden). Figure 7 yes Figures 1 to 6 Radial projection diagram of the moving iron core; Figure 8 yes Figures 1 to 6 A three-dimensional view of the middle valve plug; Figure 9 yes Figure 4 Cross-sectional view of the middle valve plug along the AA direction; Figure 10 yes Figures 1 to 6 3D view of the wear-resistant ring; Figure 11 yes Figure 5 China F1 and Figure 6 Enlarged view of section F2.

[0018] Explanation of reference numerals in the attached figures: 001. Solenoid valve; 100. Valve body; 101. Air inlet; 102. Air outlet; 103. Receiving cavity; 1031. Proximal area of ​​inlet / outlet; 1032. Middle area of ​​inlet / outlet; 1033. Distal area of ​​inlet / outlet; 104. Damping section; 110. Valve nozzle; 111. Abutment ring; 120. Connecting pipe; 130. Magnetic guide ring pipe; 140. Magnetic shielding pipe; 150. Static iron core; 200. Valve core; 201. Air guide passage; 210. Moving iron core; 2101. First diameter section; 2102. Second diameter section; 2103. Third diameter section; 211. Main body; 2111. Abutment surface; 212. Sealing part; 220. Valve plug; 221. End face sealing part; 2211. Chamfer; 222. Sleeve part; 223. Damping part; 2231. Inlet / outlet near end face; 22311. Outer arc surface; 22312. Inner arc surface; 2232. Inlet / outlet far end face; 224. Air guide part; 230. Wear-resistant ring; 231. Arc area; 232. Planar area; 300. Coil assembly; 310. Electromagnetic coil; 320. Coil support; 330. Coil housing; 400. Return spring; 500, shock-absorbing pad; φ, axis; o, axial direction; z, circumferential direction; r, radial direction. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Furthermore, it should be noted that in the description of this utility model, mm represents millimeter, cm represents centimeter, and m represents meter.

[0023] like Figures 1 to 6 As shown, in some embodiments of this utility model, the solenoid valve 001 includes a valve body 100, a valve core 200, a coil assembly 300, a return spring 400, and an optional shock-absorbing pad 500. The valve core 200 is movably disposed within the valve body 100. The coil assembly 300 is mounted on the outside of the valve body 100 and is used to drive the valve core 200 to move in one direction. The return spring 400 is disposed within the valve body 100 and located axially between the valve body 100 and the valve core 200 to drive the valve core 200 to move in another direction. The shock-absorbing pad 500 is disposed within the valve body 100 and located axially between the valve body 100 and the valve core 200 to mitigate the impact of the valve core 200 on the valve body 100.

[0024] like Figures 1 to 6 As shown, in some embodiments of this utility model, the valve body 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 cores 150 are fixedly connected or integrally formed.

[0025] Among them, the fixed connection can be any feasible connection method such as welding, interference fit, threaded connection, etc.

[0026] For example, the valve nozzle 110 and the connecting pipe 120 are fixedly connected together by means of interference fit, welding, threaded connection, etc. The magnetic ring tube 130, the magnetic shielding tube 140 and the stationary iron core 150 are formed into a single piece by means of machining, welding, etc.

[0027] Continue reading Figures 1 to 6 In some embodiments of this utility model, the valve body 100 is defined with an air inlet 101, an air outlet 102, and a receiving cavity 103.

[0028] 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.

[0029] 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.

[0030] like Figure 2 , Figure 5 and Figure 6 As shown, in some embodiments of this utility model, the valve nozzle 110 includes an abutment ring 111 protruding from the inlet 101 or outlet 102 into the receiving cavity 103 along the axial direction of the valve body 100, so that the valve core 200 blocks the air passage between the inlet 101 and the outlet 102 by abutting against the abutment ring 111.

[0031] like Figure 5 and Figure 6 As shown, in some embodiments of this utility model, the peripheral wall of the receiving cavity 103 includes a damping section 104, so that the valve body 100 slides in contact with the valve plug 220 of the valve core 200 through the damping section 104, hindering the movement of the valve core 200, thereby reducing the impact of the valve core 200 on the valve body 100.

[0032] like Figures 1 to 6 As shown, in some embodiments of this utility model, the valve core 200 includes a moving iron core 210, a valve plug 220, and an optional wear-resistant ring 230. The valve plug 220 is mounted on the moving iron core 210 so that the valve core 200 controls the opening and closing of the air passage between the air inlet 101 and the air outlet 102 through the valve plug 220. The wear-resistant ring 230 is fixed to the moving iron core 210 by means of interference fit, threaded connection, welding, snap-fit, welding, etc., so that the valve core 200 slides in contact with the valve body 100 through the wear-resistant ring 230 (specifically, it slides in contact with the magnetic ring tube 130).

[0033] like Figure 1 , Figure 2 and Figure 7 As shown, in some embodiments of this utility model, the moving iron core 210 includes a main body 211 that is clearance-fitted with the valve body 100 and a sealing part 212 for mounting the valve plug 220. The radial r-section of the sealing part 212 is smaller than the radial r-section of the main body 211.

[0034] Furthermore, the moving iron core 210 includes a first diameter segment 2101, a second diameter segment 2102, and a third diameter segment 2103, whose outer diameters decrease sequentially and are distributed in sequence. The wear-resistant ring 230 is sleeved on the second diameter segment 2102 and abuts against the first diameter segment 2101. The valve plug 220 is sleeved on the third diameter segment 2103.

[0035] In other words, the main body 211 may include a first diameter segment 2101 and a second diameter segment 2102, and the sealing part 212 may include a third diameter segment 2103.

[0036] from Figure 7 As can be seen, the sealing part 212, namely the third diameter section 2103, is provided with multiple annular grooves (not marked in the figure) to fix the valve plug 220 and prevent the valve plug 220 from falling off.

[0037] like Figure 8 and 9 As shown, in some embodiments of the present invention, the valve plug 220 includes an end face sealing portion 221, a sleeve portion 222, a damping portion 223, and at least one flow guide portion 224.

[0038] like Figure 5 and Figure 6 As shown, the end face sealing part 221 selectively abuts against the abutment ring 111 as the valve core 200 moves, thereby realizing the opening and closing of the air passage between the air inlet 101 and the air outlet 102.

[0039] Continue reading Figure 5 and Figure 6 The sleeve 222 is fitted onto the moving iron core 210 to fix the valve plug 220 onto the moving iron core 210.

[0040] like Figure 5 , Figure 6 and Figure 9 As shown, the inner side of the sleeve portion 222 is provided with a plurality of annular protrusions (not marked in the figure), which are embedded in the annular groove on the moving iron core 210 to fix the valve plug 220 to the moving iron core 210 in the axial direction o.

[0041] like Figure 8 and Figure 9As shown, the damping portion 223 protrudes outward along the radial direction r of the valve plug 220. That is, the damping portion 223 protrudes outward from the sleeve portion 222 along its radial direction r. The damping portion 223 slides in contact with the damping section 104 of the valve body 100, and the damping portion 223 is deformed by the damping section 104 in the radial direction r to generate a damping force that hinders the movement of the valve core 200 along its axial direction o.

[0042] Furthermore, in some embodiments of this utility model, there may be multiple damping portions 223, which are distributed at intervals along the circumferential z-axis of the valve plug 220, so that gas flows from between two adjacent damping portions 223 along the axial o-axis of the valve plug 220.

[0043] Furthermore, all the damping parts 223 are evenly distributed along the circumferential z-axis of the valve plug 220 to ensure the concentricity of the valve core 200 and the valve body 100.

[0044] Furthermore, the number of damping parts 223 is selected from any value from 2 to 8, such as 2, 3, 5, 8, etc.

[0045] In addition, those skilled in the art may, as needed, provide only one damping part 223 and open at least one air guide channel through its axial direction o on the damping part 223 so that the gas flows between the two ends of the damping part 223 in the axial direction.

[0046] like Figure 8 and Figure 9 As shown, in some embodiments of this utility model, the outer diameter of the sleeve portion 222 is equal along the axial direction o from the end face sealing portion 221 to the damping portion 223. Furthermore, the end face sealing portion 221 and the damping portion 223 are respectively disposed at the two axial ends of the sleeve portion 222, so that the sleeve portion 222 is firmly fixed to the moving iron core 210 along the radial direction r by the end face sealing portion 221 and the damping portion 223 compressed by the damping section 104.

[0047] like Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, in some embodiments of this utility model, the axial thickness of the damping part 223 gradually increases in the direction close to the axis φ of the valve core 200 to prevent the damping part 223 from tipping over during the movement of the valve core 200.

[0048] like Figure 8 and Figure 9 As shown, the damping section 223 includes an inlet / outlet proximal surface 2231 near the air inlet 101 and an inlet / outlet distal surface 2232 away from the air inlet 101. Figure 9(The end faces on both sides of the horizontal dotted line). The inlet and outlet near end faces 2231 extend toward the air inlet 101 in the direction close to the axis φ of the valve core 200 to prevent the damping part 223 from tilting toward the air inlet 101.

[0049] like Figures 5 to 7 As shown, the moving iron core 210 has an abutment surface 2111 facing the air inlet 101, and the inlet and outlet distal end surfaces 2232 abut against the abutment surface 2111, that is, the valve plug 220 abuts against the second diameter section 2102 to prevent the damping part 223 from tilting away from the air inlet 101.

[0050] like Figure 8 and Figure 9 As shown, the near-end face 2231 of the inlet / outlet includes an outer arc surface 22311 and an inner arc surface 22312. The outer arc surface 22311 is located outside the inner arc surface 22312 in the radial direction r. The outer arc surface 22311 is curved toward the side away from the air inlet 101, and the inner arc surface 22312 is curved toward the side closer to the air inlet 101 to improve the anti-tipping performance of the damping part 223.

[0051] like Figure 9 As shown, the ratio of the radius R2 of the inner arc surface 22312 to the radius R1 of the outer arc surface 22311 is selected from any value from 1.5 to 3 to improve the anti-tipping performance of the damping part 223. Specifically, the ratio of R2 to R1 can be any feasible value such as 1.5, 1.8, 1.9, 2, 2.1, 2.3, 2.5, or 3.

[0052] like Figure 8 and Figure 9 As shown, the flow guide 224 is provided on the side of the end face sealing part 221 facing the abutment ring 111 to guide the airflow when the end face sealing part 221 separates from the abutment ring 111, thereby reducing airflow noise.

[0053] like Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, the flow guide 224 is coaxial with the abutment ring 111 so that the airflow flowing through the flow guide 224 is evenly diffused in all directions, preventing the generation of a pressure difference that forces the valve core 200 to be eccentric.

[0054] like Figure 5 , Figure 6 , Figure 9 and Figure 11 As shown, the height h of the guide section 224 is less than the stroke L2 of the valve core 200, so that when the valve core 200 opens the air passage between the air inlet 101 and the air outlet 102, the guide section 224 is completely located outside the abutment ring 111 to avoid obstructing the airflow.

[0055] from Figure 8 and Figure 9 As can be seen, the flow guide 224 is set in a conical shape, and the angle γ between the conical surface of the flow guide 224 and the axis φ of the valve core 200 is selected from any value between 30° and 50°. The specific value of γ can be any feasible value such as 30°, 35°, 40°, 45°, 50°, etc.

[0056] like Figure 9 As shown, the diameter d at the root end of the guide section 224 is selected from any value between 0.5 mm and 2 mm to guide the airflow while avoiding the size of the guide section 224 being too large. The specific value of d can be any feasible value such as 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, etc.

[0057] Continue reading Figure 9 The ratio of the diameter d at the root end of the guide portion 224 to the outer diameter D1 of the end face sealing portion 221 facing one end of the guide portion 224 is selected from any value between 0.5 and 1, such as 0.5, 0.7, 0.8, 0.9, 1, etc. This is to avoid the guide portion 224 affecting the sealing performance of the end face sealing portion 221 and the contact ring 111 of the valve nozzle 110.

[0058] from Figure 5 , Figure 6 , Figure 8 and Figure 9 As can be seen, the end of the end face sealing part 221 facing the abutment ring 111 is provided with a chamfer 2211 to further reduce airflow noise.

[0059] from Figure 5 and Figure 6 As can be seen, the air inlet 101 is aligned with the abutment ring 111, and the air outlet 102 is formed on the peripheral wall of the receiving cavity 103 and aligned with the chamfer 2211, so that when the valve plug 220 leaves the abutment ring 111, the chamfer 2211 further reduces the airflow noise.

[0060] Furthermore, in this utility model, the valve plug 220 can be a component integrally made of elastic sealing materials such as rubber or silicone.

[0061] like Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, in some embodiments of this utility model, the outer diameter D of the wear-resistant ring 230 is... 环 The outer diameter D0 of the moving iron core 210 is larger than that of the moving iron core 210 to avoid contact between the moving iron core 210 and the peripheral wall of the receiving cavity 103.

[0062] like Figure 5 , Figure 6 and Figure 10As shown, the outer peripheral surface of the wear ring 230 includes an arcuate region 231 and a planar region 232, so that the wear ring 230 slides in contact with the peripheral wall of the receiving cavity 103 through the arcuate region 231, and the wear ring 230, together with the peripheral wall of the receiving cavity 103, defines the guide air passage 201, thereby allowing the gas in the receiving cavity 103 to flow through the guide air passage 201 on both sides of the wear ring 230. In this way, a pressure difference can be avoided between the two sides of the wear ring 230 along the axial direction o during the movement of the valve core 200.

[0063] from Figure 10 As can be seen from the embodiments of this utility model, there are two arc-shaped regions 231 and two planar regions 232, which are centrally symmetrical with respect to the axis φ of the wear-resistant ring 230, so that the center of mass of the wear-resistant ring 230 basically coincides with the axis φ, and prevents the valve core 200 from becoming eccentric when it moves.

[0064] like Figure 10 As shown, the axial thickness H of the arc region 231 环 With the outer diameter D of the wear-resistant ring 230 环 The ratio is selected from any value between 0.1 and 1 to prevent valve core 200 from becoming eccentric. 环 With D 环 The ratio can be any feasible value such as 0.1, 0.2, 0.3, 0.45, 0.6, 0.7, 0.8, 0.9, or 1.

[0065] Those skilled in the art will understand that the greater the axial thickness of the arc region 231, the larger the support surface for the valve core 200 in the radial direction r, and the better it can prevent the valve core 200 from deflecting in the radial direction r.

[0066] In particular, the wear-resistant ring 230 and the damping part 223 can jointly support the valve core 200. Especially since the wear-resistant ring 230 and the damping part 223 are distributed at intervals along the axial direction, the concentricity of the valve core 200 and the valve body 100 is further ensured.

[0067] Go back and refer to Figure 5 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 100 via the coil support 320.

[0068] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, in some embodiments of this utility model, the shock-absorbing pad 500 is configured as an annular shape to avoid the return spring 400.

[0069] As shown in the figure, the shock-absorbing pad 500 is a component made of porous polymer material, so that the elastic coefficient of the shock-absorbing pad 500 is smaller in the initial stage of compression and larger in the final stage of compression, thereby reducing the impact of the valve core 200 on the valve body 100 while ensuring the response speed of the valve core 200 movement.

[0070] Among them, porous polymer materials are foamed silicone, foamed PU or foamed polypropylene.

[0071] In addition, in other embodiments of this utility model, those skilled in the art may omit the shock-absorbing pad 500 as needed.

[0072] like Figure 5 and Figure 6 As shown, in the assembled state, the valve core 200 divides the receiving cavity 103 into the inlet / outlet proximal region 1031, the inlet / outlet middle region 1032, and the inlet / outlet distal region 1033.

[0073] The inlet / outlet near-end area 1031 is located between the damping section 223 and the air inlet 101, and is connected to the air inlet 101 and the air outlet 102 respectively.

[0074] Among them, the central area 1032 of the import and export section is located between the damping section 223 and the main body section 211.

[0075] Among them, the import / export remote area 1033 is located on the side of the main body 211 away from the sealing part 212.

[0076] from Figure 5 and Figure 6 As can be seen, the near-end region 1031 of the inlet / outlet and the middle region 1032 of the inlet / outlet are connected through the gap between adjacent damping sections 223. The middle region 1032 of the inlet / outlet and the far-end region 1033 of the inlet / outlet are connected through the air guide duct 201 and the radial gap between the moving iron core 210 and the stationary iron core 150.

[0077] from Figure 5 and Figure 6 It can also be seen that the moving iron core 210 and the stationary iron core 150 are respectively provided with blind holes (not marked in the figure) at their opposite ends, and the two ends of the return spring 400 are respectively embedded in the two blind holes.

[0078] like Figure 11As shown, in some embodiments of this utility model, the travel L1 of the damping part 223 sliding on the damping section 104 is less than the travel L2 of the valve core 200 moving, and the damping part 223 slides out of the damping section 104 when the valve core 200 fully opens the air passage between the air inlet 101 and the air outlet 102, so as to improve the response speed of the valve core 200 when opening the air passage between the air inlet 101 and the air outlet 102.

[0079] The following reference Figure 5 , Figure 6 and Figure 11 The working principle of the solenoid valve 001 in some embodiments of this utility model will be briefly explained below.

[0080] like Figure 5 As shown, when the solenoid valve 001 is de-energized, the solenoid coil 310 does not generate a magnetic field. The valve core 200 abuts against the valve nozzle 110 under the action of the return spring 400, thereby blocking the air passage between the air inlet 101 and the air outlet 102.

[0081] 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 spring force of return spring 400, driving valve core 200 from... Figure 5 Move the position to Figure 6 The position shown. During this process, the damping part 223 slides into contact with the damping section 104 of the valve body 100 to slow down the movement of the valve core 200 and reduce the impact force of the valve core 200 on the valve body 100.

[0082] like Figure 6 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 causes the valve core 200 to move away from the valve nozzle 110, so as to open the air passage between the air inlet 101 and the air outlet 102.

[0083] When solenoid valve 001 is de-energized, valve core 200, under the action of return spring 400, moves from... Figure 6 Move the position to Figure 5 The position shown. During this process, the damping part 223 slides into contact with the damping section 104 of the valve body 100 to slow down the movement of the valve core 200 and reduce the impact force of the valve core 200 on the valve body 100.

[0084] Based on the foregoing description, those skilled in the art will understand that the solenoid valve 001 of this utility model weakens the impact of the valve core 200 on the valve body 100 and reduces the operating noise of the solenoid valve 001.

[0085] 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.

[0086] 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.

[0087] 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: A valve body defines an air inlet, an air outlet, and a receiving cavity, and includes an abutment ring that protrudes into the receiving cavity along the axial direction of the valve body from the air inlet or the air outlet; the peripheral wall of the receiving cavity includes a damping section; A valve core is movably disposed within the receiving cavity, the valve core comprising a moving iron core and a valve plug; the valve plug comprising: The end face sealing part selectively abuts against the abutment ring as the valve core moves, thereby realizing the opening and closing of the air passage between the air inlet and the air outlet; The sleeve is fitted onto the moving iron core; At least one damping portion protrudes radially outward from the sleeve portion, the damping portion slides in contact with the damping section, and the damping portion is deformed by the damping section in the radial direction to generate a damping force that hinders the valve core from moving axially.

2. The solenoid valve according to claim 1, characterized in that, The outer diameter of the sleeve portion is equal along the axial direction from the end face sealing portion to the damping portion; and / or... The end face sealing part and the damping part are respectively disposed at the two axial ends of the sleeve part.

3. The solenoid valve according to claim 1, characterized in that, The damping parts are multiple and are distributed circumferentially along the valve plug so that gas flows axially from between two adjacent damping parts along the valve plug.

4. The solenoid valve according to claim 3, characterized in that, All of the damping portions are evenly spaced along the circumference of the valve plug to ensure the concentricity of the valve core and the valve body; and / or, The number of damping elements is selected from any value between 2 and 8.

5. The solenoid valve according to any one of claims 1 to 4, characterized in that, The axial thickness of the damping part gradually increases toward the axis of the valve core to prevent the damping part from tipping over during the movement of the valve core.

6. The solenoid valve according to claim 5, characterized in that, The damping section includes an inlet / outlet proximal face near the air inlet and an inlet / outlet distal face away from the abutment ring. The inlet and outlet proximal faces extend toward the abutment ring in a direction close to the valve core axis to prevent the damping portion from tilting toward the abutment ring; The moving iron core has an abutting surface facing the abutting ring, and the far end face of the inlet and outlet abuts against the abutting surface to prevent the damping part from tilting away from the abutting ring.

7. The solenoid valve according to claim 6, characterized in that, The near-end face of the inlet / outlet includes an outer arc surface and an inner arc surface, wherein the outer arc surface is located outside the inner arc surface in the radial direction; The outer arc surface bends toward the side away from the abutment ring; The inner arc surface bends toward the side closer to the abutment ring.

8. The solenoid valve according to claim 7, characterized in that, The ratio of the radius of the inner arc surface to the radius of the outer arc surface is selected from any value between 1.5 and 3.

9. The solenoid valve according to any one of claims 1 to 4, characterized in that, The damping part slides on the damping section for a shorter distance than the valve core moves, and the damping part slides out of the damping section when the valve core fully opens the air passage between the air inlet and the air outlet, thereby improving the response speed of the valve core when opening the air passage between the air inlet and the air outlet.

10. The solenoid valve according to any one of claims 1 to 4, characterized in that, The valve body 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 air inlet is formed on the valve nozzle, and the air outlet and the damping section are formed on the connecting pipe.

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