Electromagnetic valve and air suspension system with same

Abstract

The utility model provides an electromagnetic valve and an air suspension system with the same. The electromagnetic valve comprises a valve body, a fixed iron and an armature, the valve body is provided with an inlet and an outlet. The fixed iron is arranged on the valve body and located at the end, away from the inlet, of the valve body. The armature is movably arranged between the fixed iron and the inlet, and a sealing piece is arranged on the armature and used for blocking the inlet; an elastic assembly is arranged between the fixed iron and the armature and comprises a first elastic piece and a second elastic piece, the two ends of the first elastic piece are correspondingly connected with the fixed iron and the armature, the second elastic piece is provided with a fixed end and a free end, one of the fixed iron and the armature is connected with the fixed end, and the free end is connected with the fixed end in a partial displacement interval of the armature. The free end abuts against the other one of the fixed iron and the armature. According to the electromagnetic valve and the air suspension system with the electromagnetic valve, impact and vibration in the movement process can be reduced, and noise generated in the armature movement process can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valve production, in particular to an electromagnetic valve and an air suspension system having the same. Background Art

[0002] In the air suspension system, the solenoid valve is one of the key components, responsible for regulating the air supply, thus affecting the performance of the entire system. Therefore, the performance of the solenoid valve is directly related to the regulation effect of the air supply, which in turn affects the user experience of the air suspension system.

[0003] However, in the solenoid valve structure in the related art, when the armature reciprocates under the magnetic force of the fixed iron, it often generates a large noise. This noise not only affects the operation effect of the air suspension system, but also may have adverse effects on other components in the system, further affecting the overall performance of the vehicle. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the utility model proposes a solenoid valve and an air suspension system having the same in the embodiment, which can reduce the impact and vibration during the movement process, help reduce the noise generated by the armature movement process, and thus improve the stability and reliability of the air suspension system.

[0005] The solenoid valve disclosed in the embodiment of the utility model comprises:

[0006] a valve body having an inlet and an outlet;

[0007] A fixing iron, the fixing iron being arranged on the valve body, the fixing iron being located at an end of the valve body away from the inlet;

[0008] An armature, the armature is movably disposed between the fixed iron and the inlet, and a sealing member is disposed on the armature, and the sealing member is used to block the inlet;

[0009] An elastic component, wherein the elastic component is arranged between the fixed iron and the armature, and the elastic component comprises a first elastic member and a second elastic member, wherein the two ends of the first elastic member are correspondingly connected to the fixed iron and the armature, and the second elastic member has a fixed end and a free end, wherein one of the fixed iron and the armature is connected to the fixed end, and within a partial displacement range of the armature, the free end abuts against the other of the fixed iron and the armature.

[0010] In the solenoid valve disclosed in this embodiment, the first elastic member is always in an extended state, and the two ends of the first elastic member correspondingly abut between the fixed iron and the armature, so that the sealing member on the armature can block the inlet; the fixed end of the second elastic member can be connected to the armature, and the free end of the second elastic member can correspondingly abut the fixed iron within a partial displacement range of the armature, so that the first elastic member and the second elastic member are compressed successively during the movement of the armature toward the fixed iron, and the elastic action of the second elastic member is used to slow down the movement speed of the armature, which can reduce the impact and vibration during the movement, and help reduce the noise generated during the movement of the armature, thereby improving the stability and reliability of the air suspension system.

[0011] In addition, an embodiment of the utility model further provides an air suspension system, which includes a valve block and the solenoid valve described above, wherein the solenoid valve is arranged on the valve block.

[0012] In some embodiments, the valve body includes a valve seat, which includes a seat body portion and a seat sleeve portion, the seat sleeve portion is located at one end of the seat body portion close to the armature, the seat body portion is provided with a boss, the boss is located in the seat sleeve portion, and the boss is located at one end of the inlet close to the armature, the boss is used to abut against the sealing member, and the outlet is provided on the seat sleeve portion.

[0013] In some embodiments, the solenoid valve further includes a third elastic member, wherein the third elastic member is disposed between the sealing member and the valve seat, and the third elastic member is used to apply a force from the armature toward the fixed iron to the sealing member.

[0014] In some embodiments, the valve body also includes a magnetic isolation tube, which includes a first section and a second section connected to each other, the first section is connected to the fixed iron, the second section has a closed tail portion, and the closed tail portion is connected to the seat sleeve portion by an interference fit.

[0015] In some embodiments, the magnetic isolation tube is integrally formed, and the first section of the magnetic isolation tube is connected to the fixed iron by welding or spot riveting.

[0016] In some embodiments, the magnetic isolation tube is integrally formed, and a top cover portion is provided at one end of the magnetic isolation tube away from the valve seat. The top cover portion is wrapped around the outside of the fixed iron, and the top cover portion and the fixed iron are connected by interference fit or spot rivets.

[0017] In some embodiments, a first step surface is formed between the first section and the second section, and the valve body further includes a valve bushing, which is sleeved on the first section by an interference fit, and the valve bushing is abutted against the first step surface.

[0018] In some embodiments, the seal includes a support seat and a sealing head, the sealing head has a fixing portion and an abutting portion, a second step surface is formed between the fixing portion and the abutting portion, and a first connecting member is also provided between the fixing portion and the support seat, the first connecting member has an L-shaped claw, the L-shaped claw is engaged at the second step surface, and the abutting portion is used to abut against the inlet.

[0019] In some embodiments, the support seat is provided with a guide rod and a convex edge, the armature is provided with a mounting hole, and the guide rod is inserted into the mounting hole; the solenoid valve further includes a second connecting member, one end of the second connecting member is connected to the armature, and the other end of the second connecting member has a fixing claw, and the fixing claw is buckled and connected with the convex edge;

[0020] And / or, the plugging head is rubber injection-molded, the first connecting piece is annular, and the plugging head is pressed into the first connecting piece by interference fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a solenoid valve provided in one embodiment of the utility model.

[0022] Figure 2 It is a three-dimensional schematic diagram of a valve seat in a solenoid valve provided in one embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of the internal structure of a valve seat in a solenoid valve provided in one embodiment of the utility model.

[0024] Figure 4 It is a structural schematic diagram of a sealing component in a solenoid valve provided in one embodiment of the utility model.

[0025] Figure 5 It is a structural schematic diagram of a solenoid valve provided in another embodiment of the utility model.

[0026] Figure 6 It is a structural schematic diagram of the solenoid valve installed on the valve block in the air suspension system provided by one embodiment of the utility model.

[0027] Reference numerals:

[0028] 10. Valve body; 11. Inlet; 12. Outlet; 13. Valve seat; 131. Seat body; 132. Seat sleeve; 133. Boss; 134. Sealing surface; 14. Magnetic isolation tube; 141. First section; 142. Second section; 143. Closing tail; 144. First step surface; 145. Top cover; 15. Valve bushing;

[0029] 20. Ding Tie;

[0030] 30. armature; 31. first mounting slot; 32. second mounting slot; 33. mounting hole; 34. second connecting member; 35. limit slot;

[0031] 40, sealing member; 41, supporting seat; 411, guide rod; 412, convex edge; 42, plugging head; 421, fixing portion; 422, abutting portion; 423, second step surface; 43, first connecting member; 431, L-shaped claw;

[0032] 50, elastic component; 51, first elastic member; 52, second elastic member; 521, fixed end; 522, free end;

[0033] 60. third elastic member; 70. valve block; DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0035] like Figures 1 to 4 As shown, the embodiment of the utility model provides a solenoid valve, which includes a valve body 10, a fixed iron 20, an armature 30 and an elastic component 50. The valve body 10 has an inlet 11 and an outlet 12, and the fixed iron 20 is arranged on the valve body 10, and the fixed iron 20 is located at an end of the valve body 10 away from the inlet 11. The armature 30 is movably arranged between the fixed iron 20 and the inlet 11, and a sealing member 40 is arranged on the armature 30, and the sealing member 40 is used to block the inlet 11. The elastic component 50 is arranged between the fixed iron 20 and the armature 30, and the elastic component 50 includes a first elastic member 51 and a second elastic member 52, and the two ends of the first elastic member 51 are connected to the fixed iron 20 and the armature 30 respectively; the second elastic member 52 has a fixed end 521 and a free end 522, one of the fixed iron 20 and the armature 30 is connected to the fixed end 521, and in the partial displacement range of the armature 30, the free end 522 abuts against the other of the fixed iron 20 and the armature 30.

[0036] In this embodiment, the solenoid valve is a normally closed valve, that is, in the initial state, the sealing member 40 blocks the inlet 11, and the inlet 11 and the outlet 12 are in a disconnected state; when the armature 30 moves toward the fixed iron 20, the armature 30 drives the sealing member 40 to open the inlet 11, so that the inlet 11 and the outlet 12 of the valve body 10 can be connected. Specifically, during the operation of the solenoid valve, the magnetic field will attract the armature 30 to the vicinity of the fixed iron 20, so that the armature 30 moves in the valve body 10 to open the inlet 11, and generates a force on the elastic component 50 to deform the elastic component 50; when the magnetic field disappears or changes, the deformation force of the elastic component 50 can push the armature 30 to move to block the inlet 11.

[0037] The first elastic member 51 is always in an extended state, and the two ends of the first elastic member 51 are correspondingly abutted between the fixed iron 20 and the armature 30, so that the sealing member 40 on the armature 30 can block the inlet 11. The fixed end 521 of the second elastic member 52 can be connected to the armature 30, and the free end 522 of the second elastic member 52 can be correspondingly abutted against the fixed iron 20 in a partial displacement range of the armature 30, so that the first elastic member 51 and the second elastic member 52 are compressed successively during the movement of the armature 30 toward the fixed iron 20, and the elastic action of the second elastic member 52 is used to slow down the movement speed of the armature 30, which can reduce the impact and vibration during the movement, and help reduce the noise generated during the movement of the armature 30, thereby improving the stability and reliability of the air suspension system.

[0038] In this embodiment, the partial displacement range of the armature 30 refers to the situation that, in the initial stage of the movement of the armature 30 toward the fixed iron 20, the free end 522 of the second elastic member 52 does not abut the fixed iron 20, and the second elastic member 52 is not compressed. As the movement stroke of the armature 30 toward the fixed iron 20 increases, the free end 522 of the second elastic member 52 abuts the fixed iron 20, and the second elastic member 52 is compressed and deformed, thereby slowing down the movement speed of the armature 30 and reducing the impact and vibration generated during the movement of the armature 30.

[0039] It should be noted that, in some embodiments, the fixed end 521 of the second elastic member 52 may be correspondingly connected to the fixed iron 20 , and accordingly, the free end 522 of the second elastic member 52 may abut against the fixed iron 20 within a partial displacement range of the armature 30 .

[0040] Furthermore, a first mounting groove 31 and a second mounting groove 32 are provided on the armature 30. The first mounting groove 31 and the second mounting groove 32 are coaxially arranged. The first mounting groove 31 is used to accommodate the first elastic member 51, and the second mounting groove 32 is used to accommodate the second elastic member 52, so that the fixed installation of the first elastic member 51 and the second elastic member 52 is more reliable.

[0041] Optionally, the first elastic member 51 and the second elastic member 52 may be configured as springs or elastic pads, etc. In the present embodiment, the first elastic member 51 and the second elastic member 52 are both configured as springs, and the first elastic member 51 and the second elastic member 52 are coaxially disposed in the first mounting groove 31 and the second mounting groove 32, so that the armature 30 is more stable during the reciprocating motion, which helps to reduce the impact and vibration generated during the motion.

[0042] like Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the valve body 10 includes a valve seat 13, and the valve seat 13 includes a seat body portion 131 and a seat sleeve portion 132. The seat sleeve portion 132 is located at one end of the seat body portion 131 close to the armature 30. The seat body portion 131 is provided with a boss 133, and the boss 133 is arranged in the seat sleeve portion 132. The boss 133 is located at one end of the inlet 11 close to the armature 30. The boss 133 is used to abut against the seal 40, and the outlet 12 is arranged on the seat sleeve portion 132.

[0043] In this embodiment, the valve seat 13 can be configured to be integrally formed, and the inlet 11 and the outlet 12 are both disposed on the valve seat 13, thereby simplifying the production process, reducing the difficulty of development, making the structure more compact, and making maintenance more convenient. In addition, the seat sleeve 132 is annular to form a cavity, and the seat sleeve 132 is disposed at one end of the seat body 131 close to the armature 30, and the boss 133 has a sealing surface 134 that abuts against the seal 40, so that the sealing surface 134 of the boss 133 can be wrapped in the cavity in the seat sleeve 132, thereby reducing the exposure of the sealing surface 134 to the outside and reducing the risk of being damaged.

[0044] Furthermore, in the axial direction of the solenoid valve, the outlet 12 is located below the sealing surface 134, thereby reducing the residual fluid in the valve body 10, preventing the fluid from corroding the internal components of the solenoid valve, and helping to increase the service life of the solenoid valve. In addition, the outlet 12 can be provided in plurality, and the plurality of outlets 12 are evenly arranged around the side wall of the seat sleeve 132, thereby improving the flow efficiency of the fluid in the valve body 10.

[0045] like Figure 1 and Figure 4 As shown, in some embodiments, the seal 40 includes a support seat 41 and a sealing head 42, the sealing head 42 has a fixing portion 421 and an abutting portion 422, a second step surface 423 is formed between the fixing portion 421 and the abutting portion 422, a first connecting member 43 is also provided between the fixing portion 421 and the support seat 41, the first connecting member 43 has an L-shaped claw 431, the L-shaped claw 431 is snapped on the second step surface 423, and the abutting portion 422 is used to abut against the inlet 11.

[0046] In this embodiment, the plugging head 42 is a columnar body, and the cross-sectional area of ​​the fixing portion 421 is larger than the cross-sectional area of ​​the abutting portion 422, so that a second step surface 423 is formed at the connection between the fixing portion 421 and the abutting portion 422. The second step surface 423 is also the end surface of the fixing portion 421 facing the abutting portion 422. The support seat 41 has a mounting portion with a similar structure to the fixing portion 421, and one end of the first connecting member 43 can be mounted on the mounting portion of the support seat 41 by interference fit, and the other end of the first connecting member 43 is provided with an L-shaped claw 431, which is buckled at the second step surface 423, so that the plugging head 42 can be firmly mounted on the mounting portion of the support seat 41, and the connection and installation are more stable. In addition, the provision of the first connecting member 43 makes the installation and disassembly of the plugging head 42 simpler, and it is convenient to replace the plugging head 42.

[0047] Furthermore, the plugging head 42 is rubber injection molded, the first connecting piece 43 is set to be annular, and the plugging head 42 is pressed into the first connecting piece 43 by interference fit, so that the connection between the plugging head 42 and the support seat 41 can be more stable, reducing the possibility of the plugging head 42 detaching from the first connecting piece 43.

[0048] Furthermore, a guide rod 411 and a flange 412 are provided on the support seat 41, a mounting hole 33 is provided on the armature 30, the guide rod 411 is passed through the mounting hole 33, and the solenoid valve also includes a second connecting member 34, one end of the second connecting member 34 is connected to the armature 30, and the other end of the second connecting member 34 has a fixing claw, which is snap-fitted and connected to the flange 412.

[0049] Specifically, the mounting hole 33 on the armature 30 can be located on the central axis of the armature 30, and the guide rod 411 of the support seat 41 is passed through the mounting hole 33, thereby preventing the seal 40 from deviating from the movement direction of the armature 30, helping to ensure the accuracy of the seal 40 in sealing the inlet 11, and facilitating control and use.

[0050] In addition, a limiting slot 35 is provided on the armature 30, one end of the first connecting member 43 is clamped in the limiting slot 35, and the other end of the second connecting member 34 is provided with a fixing claw, which is L-shaped and can be engaged with the convex edge 412 of the support seat 41, thereby realizing the connection between the second connecting member 34 and the support seat 41, so as to fix the support seat 41 to the armature 30, so that the fixed installation of the support seat 41 is more stable and reliable.

[0051] like Figure 1 and Figure 4 As shown, in some embodiments, the solenoid valve further includes a third elastic member 60 , which is disposed between the sealing member 40 and the valve seat 13 , and is used to apply a force from the armature 30 toward the fixed iron 20 to the sealing member 40 .

[0052] Specifically, a flange is formed at the connection between the first connecting member 43 and the support seat 41, one end of the third elastic member 60 abuts against the outer side of the boss 133 of the valve seat 13, and the other end of the third elastic member 60 abuts against the flange of the first connecting member 43, so that when the sealing member 40 moves away from the inlet 11 to open the inlet 11, the third elastic member 60 can apply a force to the sealing member 40 to assist in opening the inlet 11, which helps to improve the opening efficiency of the inlet 11 and reduce the magnetic field force required to open the inlet 11, and can effectively absorb the vibration and impact of the sealing member 40 in the process of opening the inlet 11, thereby reducing damage to the system.

[0053] Optionally, the third elastic member 60 is a spring or an elastic pad.

[0054] like Figure 1 As shown, in some embodiments, the valve body 10 also includes a magnetic isolation tube 14, which includes a first section 141 and a second section 142 connected to each other, the first section 141 is connected to the fixed iron 20, and the second section 142 has a closed tail portion 143, and the closed tail portion 143 is connected to the seat sleeve portion 132 by an interference fit.

[0055] Furthermore, the magnetic isolation tube 14 is integrally formed, and the first section 141 of the magnetic isolation tube 14 is connected to the fixed iron 20 by welding or spot riveting.

[0056] Furthermore, a first step surface 144 is formed between the first section 141 and the second section 142 . The valve body 10 further includes a valve bushing 15 . The valve bushing 15 is sleeved on the first section 141 by an interference fit, and the valve bushing 15 is abutted against the first step surface 144 .

[0057] Specifically, the magnetic isolation tube 14 can be a tubular component with two open ends, the fixed iron 20 is sealed at one open end of the magnetic isolation tube 14, and the valve seat 13 is sealed at the other open end of the magnetic isolation tube 14, so that the valve body 10 is in a sealed state. In addition, the first section 141 of the magnetic isolation tube 14 can be connected to the fixed iron 20 by welding or spot riveting, and the closing tail 143 of the second section 142 can be matched with the shape of the valve sleeve, so that the second section 142 of the magnetic isolation tube 14 can be fitted to the outside of the seat sleeve 132 by interference fit, so that the connection between the magnetic isolation tube 14 and the seat sleeve 132 can be more stable, and the valve seat 13 can be prevented from being separated from the magnetic isolation tube 14 through the seat sleeve 132.

[0058] In addition, the cross-sectional area of ​​the first section 141 of the magnetic isolation tube 14 is smaller than the cross-sectional area of ​​the second section 142, so as to form a first step surface 144 at the connection between the first section 141 and the second section 142, and the end of the seat sleeve 132 abuts against the inner side of the magnetic isolation tube 14 and correspondingly abuts against the inner side of the first step surface 144, so that the seat sleeve 132 can be limited to ensure the installation accuracy of the seat sleeve 132 and the magnetic isolation tube 14.

[0059] In addition, the valve bushing 15 is used to install and fix the solenoid valve to the valve block. The valve bushing 15 is sleeved on the first section 141 through an interference fit, and the valve bushing 15 abuts against the first step surface 144, thereby limiting the installation accuracy of the valve bushing 15, which helps to ensure the installation accuracy of the solenoid valve on the valve block.

[0060] like Figure 5 As shown, in some embodiments, the magnetic isolation tube 14 is integrally formed, and a top cover portion 145 is provided at one end of the magnetic isolation tube 14 away from the valve seat 13. The top cover portion 145 is wrapped around the outside of the fixed iron 20, and the top cover portion 145 and the fixed iron 20 are connected by interference fit or spot rivets.

[0061] Specifically, the magnetic isolation tube 14 is formed by deep drawing, one end of the magnetic isolation tube 14 is open, and the other end of the magnetic isolation tube 14 is a top cover portion 145. The top cover portion 145 is located on the first section 141. The fixed iron 20 can be installed to the top cover portion 145 by interference fit or spot riveting, thereby achieving precise positioning of the fixed iron 20, which helps to improve the installation accuracy of the fixed iron 20.

[0062] In addition, the embodiment of the utility model further provides an air suspension system, the air suspension system comprises a valve block 70 and the above-mentioned solenoid valve, and the solenoid valve is arranged on the valve block 70. Figure 6 As shown, the solenoid valve can be fixed to the valve block through the valve bushing 15. It should be noted that the air suspension system can be a closed air supply system, and the beneficial effects that can be achieved by the air suspension system can refer to the beneficial effects corresponding to the solenoid valve provided above, which will not be repeated here.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A solenoid valve, characterized in that: include: a valve body having an inlet and an outlet; A fixing iron, the fixing iron being arranged on the valve body, the fixing iron being located at an end of the valve body away from the inlet; An armature, the armature is movably disposed between the fixed iron and the inlet, and a sealing member is disposed on the armature, and the sealing member is used to block the inlet; An elastic component, wherein the elastic component is arranged between the fixed iron and the armature, and the elastic component comprises a first elastic member and a second elastic member, wherein the two ends of the first elastic member are correspondingly connected to the fixed iron and the armature, and the second elastic member has a fixed end and a free end, wherein one of the fixed iron and the armature is connected to the fixed end, and within a partial displacement range of the armature, the free end abuts against the other of the fixed iron and the armature.

2. The solenoid valve according to claim 1, characterized in that: The valve body includes a valve seat, and the valve seat includes a seat body portion and a seat sleeve portion. The seat sleeve portion is located at one end of the seat body portion close to the armature. The seat body portion is provided with a boss, and the boss is located in the seat sleeve portion. The boss is located at one end of the inlet close to the armature, and the boss is used to abut against the sealing member. The outlet is provided on the seat sleeve portion.

3. The solenoid valve according to claim 2, characterized in that: The solenoid valve further comprises a third elastic member, wherein the third elastic member is disposed between the sealing member and the valve seat, and the third elastic member is used for applying a force from the armature toward the fixed iron to the sealing member.

4. The solenoid valve according to claim 2, characterized in that: The valve body also includes a magnetic isolation tube, which includes a first section and a second section connected to each other, the first section is connected to the fixed iron, the second section has a closed tail portion, and the closed tail portion is connected to the seat sleeve portion by an interference fit.

5. The solenoid valve according to claim 4, characterized in that: The magnetic isolation tube is integrally formed, and the first section of the magnetic isolation tube is connected to the fixed iron by welding or spot riveting.

6. The solenoid valve according to claim 4, characterized in that: The magnetic isolation tube is integrally formed, and a top cover is provided at one end of the magnetic isolation tube away from the valve seat. The top cover is wrapped around the outside of the fixed iron, and the top cover and the fixed iron are connected by interference fit or spot rivets.

7. The solenoid valve according to claim 4, characterized in that: A first step surface is formed between the first section and the second section. The valve body further comprises a valve bushing, which is sleeved on the first section by interference fit and abuts against the first step surface.

8. The solenoid valve according to any one of claims 1 to 7, characterized in that: The sealing member includes a supporting seat and a sealing head, the sealing head has a fixing portion and an abutting portion, a second step surface is formed between the fixing portion and the abutting portion, a first connecting member is also provided between the fixing portion and the supporting seat, the first connecting member has an L-shaped claw, the L-shaped claw is engaged with the second step surface, and the abutting portion is used to abut against the inlet.

9. The solenoid valve according to claim 8, characterized in that: The support seat is provided with a guide rod and a convex edge, the armature is provided with a mounting hole, and the guide rod is inserted into the mounting hole; the solenoid valve also includes a second connecting member, one end of the second connecting member is connected to the armature, and the other end of the second connecting member has a fixing claw, and the fixing claw is buckled and connected with the convex edge; And / or, the plugging head is rubber injection-molded, the first connecting piece is annular, and the plugging head is pressed into the first connecting piece by interference fit.

10. An air suspension system, characterized in that: The air suspension system comprises a valve block and the solenoid valve according to any one of claims 1 to 9, wherein the solenoid valve is arranged on the valve block.

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