Electromagnetic valve structure of air spring system

Abstract

The invention belongs to an electromagnetic valve structure of an air spring system in the technical field of air spring systems. A clamping hook is arranged in the valve shell (13) and comprises a flange (8) and a hook claw (9), the flange (8) is connected with the sealing element (4), the hook claw (9) comprises a straight edge (10) and a hook part (11), the straight edge (10) and the hook part (11) are of an L-shaped structure, a T-shaped head is arranged at the end, close to the sealing element (4), of the magnetic core body (6) and comprises a body part (12) and a connecting part (13), the length of the straight edge (10) is larger than the thickness of the body part (12), and the hook claw (9) is clamped on the body part (12). The flange (8) is located on one side face of the body part (12), and the hook part (11) is located on the other side face of the body part (12). According to the electromagnetic valve structure of the air spring system, the structure is simple, on-off control of the electromagnetic valve can be conveniently and reliably achieved, it is guaranteed that the stroke between the sealing element and the sealing ring is maximum, and the opening performance is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air spring systems, and more specifically, relates to a solenoid valve structure for an air spring system. Background Art

[0002] The solenoid valve is used in the air spring system of an automobile to realize the switching of the air path and supply air to the air spring. In the existing technology, when the moving iron core in the solenoid valve is energized, it is magnetized and moves towards the static iron core against the acting force of the return spring. At this time, the sealing structure is opened and the medium flows through; after the power is cut off, the moving iron core resets under the action of the return spring, the sealing structure closes, and the medium flow is cut off.

[0003] There is a technology with the name of "Solenoid Valve Assembly" and the publication (announcement) number of "CN108679288B" in the existing technology. This technology includes a magnetic core that defines a passage. The valve seat is received by the passage and defines a compartment. The outflow chamber is defined between the magnetic core and the valve seat. The valve seat defines an orifice that fluidly connects the compartment of the valve seat to the outflow chamber. The push rod can be axially moved to open and close the orifice. The valve seat further defines a check valve orifice that fluidly connects the compartment of the valve seat to the outflow chamber. The ball covers the check valve orifice. The filter seat is fixed to the valve seat. The ball guide is arranged to align with the check valve orifice and defines a guide channel that receives the ball for guiding the ball towards and away from the check valve orifice.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: aiming at the deficiencies of the existing technology, to provide a solenoid valve structure for an air spring system with a simple structure, which can conveniently and reliably realize the on-off control of the solenoid valve, and ensure the maximum stroke between the sealing element and the sealing ring, and improve the opening performance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0007] The present invention is a solenoid valve structure for an air spring system. A hook is arranged in the valve housing. The hook includes a flange and a claw. The flange is connected to the sealing element. The claw includes a straight edge and a hook part. The straight edge and the hook part are in an L-shaped structure. A T-shaped head is arranged at one end of the magnetic core body close to the sealing element. The T-shaped head includes a body part and a connecting part. The length of the straight edge is greater than the thickness of the body part. The claw is clamped on the body part. The flange is located on one side surface of the body part, and the hook part is located on the other side surface of the body part.

[0008] The flange of the hook is a cylindrical structure, and a plurality of claws are arranged at intervals along the circumference of the flange edge. The straight edge of the claw is perpendicular to the flange.

[0009] Alternatively, a guide sleeve is provided inside the valve housing. A bent portion is provided at the end of the guide sleeve. A push rod is provided inside the guide sleeve, and the push rod is connected to a sealing element.

[0010] The sealing component is close to the sealing ring position of the valve sleeve. The valve sleeve is installed inside one end of the valve housing, the magnetic core body is installed inside the valve housing, and a fixing member is provided at the other end inside the valve housing.

[0011] A spring is sleeved on the outer ring of the sealing element. One end of the spring abuts against the flange of the claw, and the other end of the spring abuts against the valve sleeve.

[0012] A return spring is provided in the cavity inside the magnetic core body. One end of the return spring abuts against the fixing member, and the other end of the return spring abuts against the bottom end of the cavity.

[0013] When the magnetic core body is not energized, a gap is formed between the body portion of the T-shaped head and the hook portion of the hook. The distance of the gap is equal to the difference between the length of the straight edge and the thickness of the body portion.

[0014] The bent portion is perpendicular to the center line of the guide sleeve. When the magnetic core body is not energized, a gap is formed between the push rod and the magnetic core body.

[0015] A plurality of bent portions are provided at the end of the guide sleeve. An opening is provided between adjacent bent portions, and the opening between adjacent bent portions movably clamps the boss of the push rod.

[0016] A spring is sleeved on the outer ring of the push rod. One end of the spring abuts against the boss, and the other end of the spring abuts against the valve sleeve.

[0017] Adopting the technical solution of the present invention, the working principle and beneficial effects are as follows:

[0018] The solenoid valve structure of the air spring system described in the present invention arranges a magnetic core body and a hook in a valve housing. The hook includes a flange and a claw, and the flange and the claw are of an integral structure. The flange is connected to a sealing element, which is made of an elastic rubber material. The sealing element is close to a sealing ring, and the hook is clamped and connected to the body part of the T-shaped head of the magnetic core body. Due to the structural setting that the length of the straight edge is greater than the thickness of the body part, the hook is not only reliably connected to the magnetic core body but also can move relative to the magnetic core body by a certain distance, and the distance of this movement is the clearance part. The magnetic core body can move relative to the valve housing in the opening direction (away from the sealing element) or the closing direction (towards the sealing element) to open or close the through hole (outlet) of the valve sleeve. When the magnetic core body is not energized, under the action of the return spring, the sealing element fits with the sealing ring of the valve sleeve to seal the through hole. At this time, there is a clearance part between the magnetic core body and the claw, and this clearance part is called the dead band. When the magnetic core body is energized, the magnetic core body moves relative to the valve housing in the opening direction. Because there is a clearance part between the magnetic core body and the claw, the magnetic core body moves alone first and does not drive the hook and the sealing element to move. After the magnetic core body moves a certain distance, it contacts the claw. At this time, when the magnetic core body moves, it drives the hook to move synchronously. Since the hook is fixedly connected to the sealing element, the sealing element moves synchronously with the hook, and the sealing element moves away from the sealing ring, and the sealing ring no longer seals the through hole, and the magnetic core body moves in place. At this time, due to the existence of the spring, the spring generates a thrust force acting on the hook, pushing the hook to continue to move, that is, the hook moves relative to the magnetic core body until a clearance part is re-formed between the magnetic core body and the claw, that is, the sealing element continues to move the distance of the dead band with the hook, ensuring the maximum stroke between the sealing element and the sealing ring. A magnetic core body and a push rod are arranged in the valve housing. The guide sleeve is fixedly connected to the magnetic core body, the magnetic core body is movably connected to the push rod, and the push rod is fixedly connected to the sealing element. The magnetic core body can move relative to the valve housing in the opening direction (away from the sealing element) or the closing direction (towards the sealing element) to open or close the through hole (outlet) of the valve sleeve. When the magnetic core body is not energized, under the action of the return spring, the sealing element fits and seals the sealing ring to seal the through hole on the valve sleeve. At this time, there is a clearance part between the bent part of the guide sleeve and the push rod, and this clearance part is called the dead band. When the magnetic core body is energized, the magnetic core body moves relative to the valve housing in the opening direction. The magnetic core body overcomes the thrust of the return spring and moves in the opening direction. When the magnetic core body moves, it acts on the push rod through the bent part of the valve sleeve, driving the push rod to move relative to the valve housing in the opening direction. After moving a certain distance (dead band), the magnetic core body drives the sealing element to move synchronously during the movement process until the magnetic core body contacts the fixing part. After that, under the action of the spring, the spring pushes the push rod to continue to move a distance equal to the clearance part, and the movement of the push rod drives the sealing element to move synchronously, that is, the sealing element continues to move a certain distance, ensuring the maximum stroke between the sealing element and the sealing ring. This structure is beneficial for the solenoid valve to be opened with a smaller opening current or voltage and meet the stroke requirements between the sealing element and the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Brief descriptions will be given below to the content expressed in each drawing of this specification and the markings in the drawings:

[0020] Figure 1 It is a schematic structural diagram of Embodiment 1 of the solenoid valve structure of the air spring system described in the present invention;

[0021] Figure 2 It is a schematic structural diagram of Embodiment 1 of the solenoid valve structure of the air spring system described in the present invention;

[0022] Figure 3 It is a schematic structural diagram of Embodiment 1 of the solenoid valve structure of the air spring system described in the present invention;

[0023] Figure 4 It is a partial structural schematic diagram of Embodiment 2 of the solenoid valve structure of the air spring system described in the present invention;

[0024] Figure 5 It is a partial structural schematic diagram of Embodiment 2 of the solenoid valve structure of the air spring system described in the present invention;

[0025] The markings in the drawings are respectively: 1, valve sleeve; 2, sealing ring; 3, spring; 4, sealing element; 5, catch; 6, magnetic core body; 7, return spring; 8, flange; 9, hook; 10, straight edge; 11, hook portion; 12, body portion; 13, connecting portion; 14, fixing member; 15, cavity portion; 16, gap portion; 17, guide sleeve; 18, bending portion; 19, push rod; 20, boss; 21, valve housing. Specific Embodiments

[0026] The following will make a further detailed description of the specific embodiments of the present invention, such as the shapes, structures of the various components involved, the mutual positions and connection relationships between the various parts, the functions and working principles of the various parts, etc., with reference to the drawings:

[0027] As shown in the attached Figure 1 - attached Figure 3As shown in the figure, the present invention relates to a solenoid valve structure for an air spring system. A catch is provided inside the valve housing 13. The catch 5 includes a flange 8 and a hook 9. The flange 8 is connected to the sealing element 4. The hook 9 includes a straight edge 10 and a hook portion 11. The straight edge 10 and the hook portion 11 form an L-shaped structure. At one end of the magnetic core body 6 close to the sealing element 4, a T-shaped head is provided. The T-shaped head includes a body portion 12 and a connecting portion 13. The length of the straight edge 10 is greater than the thickness of the body portion 12. The hook 9 is clamped on the body portion 12. The flange 8 is located on one side surface of the body portion 12, and the hook portion 11 is located on the other side surface of the body portion 12. For the deficiencies in the prior art, the above structure proposes an improved technical solution. When the structure is set, the solenoid valve includes a valve housing 21. The magnetic core body 6 and the catch 5 are arranged in the valve housing 21. The catch 5 includes a flange 8 and a hook 9. The flange 8 and the hook 9 are of an integral structure. The flange 8 is connected to the sealing element 4. The sealing element 4 is made of an elastic rubber material. The sealing element 4 is close to the sealing ring 2. The catch 5 is clamped and connected to the body portion 12 of the T-shaped head of the magnetic core body 6. Due to the structural setting that the length of the straight edge 10 is greater than the thickness of the body portion 12, the catch 5 is not only reliably connected to the magnetic core body 6, but also can move relative to the magnetic core body 6 by a certain distance. The distance of this movement is the clearance portion 16. The magnetic core body 7 can move relative to the valve housing 21 in the opening direction (away from the sealing element 4) or the closing direction (close to the sealing element 4) to open or close the through hole (outlet) of the valve sleeve 1. When the magnetic core body 6 is not energized, under the action of the return spring 7, the sealing element 4 fits with the sealing ring 2 of the valve sleeve 1 to seal the through hole. At this time, there is a clearance portion 16 between the magnetic core body and the hook 9. This clearance portion 16 is called the dead travel. When the magnetic core body 6 is energized, the magnetic core body 6 moves relative to the valve housing 21 in the opening direction. Because there is a clearance portion 16 between the magnetic core body 6 and the hook 9, the magnetic core body 6 first moves alone and does not drive the catch 5 and the sealing element 4 to move. After the magnetic core body 6 moves a certain distance, it contacts the hook 9. At this time, when the magnetic core body 6 moves, it drives the catch 5 to move synchronously. The catch 5 is fixedly connected to the sealing element 4, so the sealing element 4 moves synchronously with the catch 5. The sealing element 4 moves away from the sealing ring 2, and the sealing ring 2 no longer seals the through hole. The magnetic core body 6 moves in place. At this time, due to the existence of the spring 3, the spring 3 generates a thrust force acting on the catch 5 to push the catch 5 to continue moving, that is, the catch 5 moves relative to the magnetic core body 6 until a clearance portion 16 is re-formed between the magnetic core body 6 and the hook, that is, the sealing element 4 moves with the catch 5 for the distance of the dead travel, ensuring the maximum stroke between the sealing element 4 and the sealing ring 2. The solenoid valve structure of the air spring system described in the present invention has a simple structure, can conveniently and reliably realize the on-off control of the solenoid valve, and ensures the maximum stroke between the sealing element and the sealing ring, improving the opening performance.

[0028] In Embodiment 1, as shown in the attached Figure 1 - attached Figure 3As shown, the flange 8 of the card hook is a cylindrical structure. Along the circumference of the flange 8, a plurality of claw hooks 9 are arranged at intervals. The straight edge 10 of the claw hook 9 is perpendicular to the flange 8. In the above structure, 3-5 claw hooks can be provided. The claw hooks are elastic, which is convenient for removing from the magnetic core body and also for installation.

[0029] In Embodiment 1, as shown in the attached Figure 1 - attached Figure 3 As shown, a spring 3 is sleeved on the outer ring of the sealing element 4. One end of the spring 3 abuts against the flange 8 of the claw, and the other end of the spring 3 abuts against the valve sleeve 1. In the above structure, when the magnetic core body 6 is not energized, under the action of the return spring 7, the return spring 7 applies a force to the magnetic core body 6 to push the claw and the sealing element, and pushes the spring 3 to compress. The sealing element 4 reliably fits against the sealing ring 2 to ensure sealing.

[0030] In Embodiment 1, as shown in the attached Figure 1 - attached Figure 3 As shown, a return spring 7 is arranged in the cavity part 15 inside the magnetic core body 6. One end of the return spring 7 abuts against the fixing part 14, and the other end of the return spring 7 abuts against the bottom end of the cavity part 15. When the magnetic core body 6 is not energized, a gap part 16 is formed between the body part 12 of the T-shaped head and the hook part 11 of the card hook. The distance of the gap part 16 is equal to the difference between the length of the straight edge 10 and the thickness of the body part 12. In the above structure, when the magnetic core body is not energized, the acting force of the return spring 7 is large, ensuring that the sealing element 4 is located at the position where it fits against the sealing ring 2, realizing the sealing of the through hole on the valve sleeve 1.

[0031] Or, as Embodiment 2, as shown in the attached Figure 4 、attached Figure 5As shown in the figure, a guide sleeve 17 is arranged inside the valve housing 13. A bent portion 18 is arranged at the end of the guide sleeve 17. A push rod 19 is arranged inside the guide sleeve 17, and the push rod 19 is connected to the sealing element 4. The sealing component 4 is attached to the sealing ring 2 of the valve sleeve 1. The valve sleeve 1 is installed inside one end of the valve housing 21, and the magnetic core body 6 is installed inside the valve housing 13. A fixing member 14 is arranged at the other end inside the valve housing 13. The bent portion 18 is perpendicular to the center line of the guide sleeve 17. When the magnetic core body 6 is not energized, a gap portion 16 is formed between the push rod 19 and the magnetic core body 6. In the above structure, the solenoid valve includes a valve housing 21. The magnetic core body 6 and the push rod 19 are arranged in the valve housing 21. The guide sleeve 17 is fixedly connected to the magnetic core body 6, the magnetic core body 6 is movably connected to the push rod 19, and the push rod 19 is fixedly connected to the sealing element 4. The magnetic core body 7 can move relative to the valve housing 21 in the opening direction (the direction away from the sealing element 4) or the closing direction (the direction close to the sealing element 4) so as to open or close the through hole (outlet) of the valve sleeve 1. When the magnetic core body 6 is not energized, under the action of the return spring 7, the sealing element 4 is attached to and seals the sealing ring 2 to seal the through hole on the valve sleeve 1. At this time, there is a gap portion 16 between the bent portion 18 of the guide sleeve 17 and the magnetic core body 6, and this gap portion 16 is called the dead travel. When the magnetic core body 6 is energized, the magnetic core body 6 moves relative to the valve housing 21 in the opening direction. The magnetic core body 6 overcomes the thrust of the return spring 7 and moves in the opening direction. When the magnetic core body 6 moves, it acts on the push rod 19 through the bent portion 18 of the valve sleeve, driving the push rod 19 to move relative to the valve housing 21 in the opening direction for a certain distance (dead travel). During the movement of the magnetic core body 6, the sealing element 4 is driven to move synchronously until the magnetic core body 6 contacts the fixing member 14. After that, under the action of the spring 3, the spring pushes the push rod 19 to continue moving a distance equal to the gap portion 16. The movement of the push rod 19 drives the sealing element 4 to move synchronously, that is, the sealing element 4 continues to move a certain distance, ensuring the maximum stroke between the sealing element 4 and the sealing ring 2.

[0032] A return spring 7 is arranged in the cavity portion 15 inside the magnetic core body 6. One end of the return spring 7 abuts against the fixing member 14, and the other end of the return spring 7 abuts against the bottom end of the cavity portion 15. In the above structure, the return spring 7 can apply a force to the magnetic core body 6 to push the magnetic core body 6 to move in the direction close to the sealing ring 2 to achieve reliable sealing of the sealing ring 2. After the magnetic core body 6 is energized, the magnetic core body 6 can overcome the force of the return spring 7 and move in the direction away from the sealing ring 2.

[0033] In Embodiment 2, as shown in the attached Figure 4 - attached Figure 5 figure, a plurality of bent portions 18 are arranged at the end of the guide sleeve 17. An opening portion is formed between adjacent bent portions 18, and the opening portion between adjacent bent portions 18 movably clamps the boss 20 of the push rod 19. In the above structure, since the opening portion between adjacent bent portions 18 movably clamps the boss 20 of the push rod 19, only axial movement can occur between the push rod 19 and the guide sleeve 17, and relative rotation will not occur.

[0034] In Embodiment 2, as shown in the Figure 4 - attached Figure 5 figure, a spring 3 is sleeved on the outer ring of the push rod 19. One end of the spring 3 abuts against the boss 20, and the other end of the spring 3 abuts against the valve sleeve 1. With the above structure, the spring 3 can apply a force on the push rod 19. After the magnetic core body 6 moves to the position where it abuts against the fixing member 14, the spring 3 can push the magnetic core body 6 to move a further distance. This ensures the maximum stroke between the sealing element 4 and the sealing ring 2.

[0035] The solenoid valve structure of the air spring system described in the present invention. In Embodiment 1, the solenoid valve includes a valve housing 21, in which a magnetic core body 6 and a catch 5 are arranged. The catch 5 includes a flange 8 and a claw 9. The flange 8 and the claw 9 are of an integral structure. The flange 8 is connected to a sealing element 4, which is made of an elastic rubber material. The sealing element 4 is close to the sealing ring 2. The catch 5 is snap-fitted to the body portion 12 of the T-shaped head of the magnetic core body 6. Due to the structural setting that the length of the straight edge 10 is greater than the thickness of the body portion 12, the catch 5 is not only reliably connected to the magnetic core body 6, but also can move relative to the magnetic core body 6 by a certain distance, and the distance of this movement is the clearance portion 16. The magnetic core body 7 can move relative to the valve housing 21 in the opening direction (away from the sealing element 4) or the closing direction (towards the sealing element 4) to open or close the through hole (outlet) of the valve sleeve 1. When the magnetic core body 6 is not energized, under the action of the return spring 7, the sealing element 4 fits against the sealing ring 2 to seal the through hole. At this time, there is a clearance portion 16 between the magnetic core body and the claw 9, and this clearance portion 16 is called the dead band. When the magnetic core body 6 is energized, the magnetic core body 6 moves relative to the valve housing 21 in the opening direction. Because there is a clearance portion 16 between the magnetic core body 6 and the claw 9, the magnetic core body 6 moves alone first and does not drive the catch 5 and the sealing element 4 to move. After the magnetic core body 6 moves a certain distance, it contacts the claw 9. At this time, when the magnetic core body 6 moves, it drives the catch 5 to move synchronously. The catch 5 is fixedly connected to the sealing element 4, so the sealing element 4 moves synchronously with the catch 5. The sealing element 4 moves away from the sealing ring 2, and the sealing ring 2 no longer seals the through hole, and the magnetic core body 6 moves into place. At this time, due to the existence of the spring 3, the spring 3 generates a thrust force acting on the catch 5 to push the catch 5 to continue moving, that is, the catch 5 moves relative to the magnetic core body 6 until a clearance portion 16 is re-formed between the magnetic core body 6 and the claw, that is, the sealing element 4 continues to move the distance of the dead band with the catch 5, ensuring the maximum stroke between the sealing element 4 and the sealing ring 2. In Embodiment 2, a magnetic core body 6 and a push rod 19 are arranged in the valve housing 21. The guide sleeve 17 is fixedly connected to the magnetic core body 6. The magnetic core body 6 is movably connected to the push rod 19. The push rod 19 is fixedly connected to the sealing element 4. The magnetic core body 7 can move relative to the valve housing 21 in the opening direction (away from the sealing element 4) or the closing direction (towards the sealing element 4) to open or close the through hole (outlet) of the valve sleeve 1. When the magnetic core body 6 is not energized, under the action of the return spring 7, the sealing element 4 fits against the sealing ring 2 to seal the through hole on the valve sleeve 1. At this time, there is a clearance portion 16 between the bent portion of the guide sleeve and the push rod, and this clearance portion 16 is called the dead band.When the magnetic core body 6 is energized, the magnetic core body 6 moves relative to the valve housing 21 in the opening direction. The magnetic core body 6 moves in the opening direction against the thrust of the return spring 7. When the magnetic core body 6 moves, it acts on the push rod 19 through the bent portion 18 of the valve sleeve, driving the push rod 19 to move relative to the valve housing 21 in the opening direction for a certain distance (idle stroke). During the movement of the magnetic core body 6, the sealing element 4 is driven to move synchronously until the magnetic core body 6 contacts the fixing member 14. Thereafter, under the action of the spring 3, the spring pushes the push rod 19 to continue moving a distance equal to the clearance portion 16. The movement of the push rod 19 drives the sealing element 4 to move synchronously, that is, the sealing element 4 is driven to continue moving a certain distance, ensuring that the maximum stroke between the sealing element 4 and the sealing ring 2 is achieved.

[0036] The present invention has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An electromagnetic valve structure of an air spring system, characterized in that: A catch is provided inside the valve housing (13). The catch (5) includes a flange (8) and a claw (9). The flange (8) is connected to the sealing element (4). The claw (9) includes a straight edge (10) and a hook portion (11). The straight edge (10) and the hook portion (11) form an L-shaped structure. A T-shaped head is provided at one end of the magnetic core body (6) close to the sealing element (4). The T-shaped head includes a body portion (12) and a connecting portion (13). The length of the straight edge (10) is greater than the thickness of the body portion (12). The claw (9) is clamped on the body portion (12). The flange (8) is located on one side surface of the body portion (12), and the hook portion (11) is located on the other side surface of the body portion (12).

2. The solenoid valve structure of the air spring system according to claim 1, characterized in that: The flange (8) of the described catch is of a cylindrical structure. A plurality of claws (9) are arranged along the circumference of the flange (8) at intervals. The straight edge (10) of the claw (9) is perpendicular to the flange (8).

3. The solenoid valve structure of the air spring system according to claim 1, characterized in that: Alternatively, a guide sleeve (17) is provided inside the valve housing (13). A bent portion (18) is provided at the end of the guide sleeve (17). A push rod (19) is provided inside the guide sleeve (17). The push rod (19) is connected to the sealing element (4).

4. The solenoid valve structure of the air spring system according to claim 2 or 3, characterized in that: The sealing component (4) is close to the sealing ring (2) of the valve sleeve (1). The valve sleeve (1) is installed inside one end of the valve housing (21). The magnetic core body (6) is installed inside the valve housing (13). A fixing member (14) is provided at the other end inside the valve housing (13).

5. The solenoid valve structure of the air spring system according to claim 4, characterized in that: An outer ring of the sealing element (4) is sleeved with a spring (3). One end of the spring (3) abuts against the flange (8) of the claw, and the other end of the spring (3) abuts against the valve sleeve (1).

6. The solenoid valve structure of the air spring system according to claim 5, characterized in that: A return spring (7) is provided in the cavity portion (15) inside the magnetic core body (6). One end of the return spring (7) abuts against the fixing member (14), and the other end of the return spring (7) abuts against the bottom end of the cavity portion (15).

7. The solenoid valve structure of the air spring system according to claim 2, characterized in that: When the magnetic core body (6) is not energized, a gap portion (16) is formed between the body portion (12) of the T-shaped head and the hook portion (11) of the catch. The distance of the gap portion (16) is equal to the difference between the length of the straight edge (10) and the thickness of the body portion (12).

8. The solenoid valve structure of the air spring system according to claim 3, characterized in that: The bent portion (18) is perpendicular to the center line of the guide sleeve (17). When the magnetic core body (6) is not energized, a gap portion (16) is formed between the push rod (19) and the magnetic core body (6).

9. The solenoid valve structure of the air spring system according to claim 3, characterized in that: A plurality of bent portions (18) are provided at the end of the guide sleeve (17). An opening is provided between adjacent bent portions (18). The opening between adjacent bent portions (18) movably clamps the boss (20) of the push rod (19).

10. The solenoid valve structure of the air spring system according to claim 9, characterized in that: An outer ring of the push rod (19) is sleeved with a spring (3). One end of the spring (3) abuts against the boss (20), and the other end of the spring (3) abuts against the valve sleeve (1).

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