Automobile air suspension electromagnetic valve

Abstract

The utility model discloses an automobile air suspension electromagnetic valve which comprises a static iron core, a movable iron core, a valve seat and an air port body, a guide groove is formed in the inner wall of the valve seat in the axial direction, a protruding edge is arranged on the outer wall of the movable iron core, and the protruding edge is connected with the guide groove in a sliding mode. The first main spring is movably connected to the surface of the neck bush in a sleeving mode, the second main spring is movably connected to the surface of the first main spring in a sleeving mode, and the spiral direction of the first main spring is opposite to that of the second main spring. The first main spring and the second main spring which are opposite in spiral direction form a set of main spring, the response speed is increased, stress of the single main spring is reduced, aging is delayed, the first main spring is guided through the neck bush, the second main spring is guided through the mounting groove, radial deformation of the first main spring and the second main spring is reduced, radial displacement of the movable iron core is avoided, and the service life of the movable iron core is prolonged. The movement of the movable iron core is further guided and limited through the guide grooves and the convex edges, the contact area of the outer wall is reduced, the friction resistance is reduced, the abrasion is reduced, the noise is reduced, and meanwhile the response speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an automotive air suspension solenoid valve. Background Art

[0002] The automotive air suspension realizes the adjustment of suspension height and softness by inputting and discharging air. Among them, the solenoid valve plays an indispensable role in the composition of the air suspension. At present, the prices of solenoid valves on the market vary from a dozen yuan to several hundred yuan. Their basic principles are the same. When the coil on the surface of the static iron core is energized, a magnetic field is generated to drive the moving iron core to move. The moving iron core drives the rubber head body to move to realize the on-off of the air port body, thereby completing the gas input and discharge of the air suspension.

[0003] Generally, the response speed and shock absorption effect of a new air suspension are very excellent. However, the biggest problem with the air suspension is durability. When a vehicle has been used for a certain period of time, or when it encounters more complex road conditions during driving, it is a huge test for the air suspension, and it is also a huge test for the solenoid valve of the air suspension.

[0004] Most of the existing moving iron cores of air suspension solenoid valves are directly inserted and installed in the magnetic isolation sleeve and the valve seat in a movable manner, and are guided and limited by the magnetic isolation sleeve and the valve seat. One side is supported by a main spring. This structure is relatively simple and has high reliability in a short time. However, as the use time increases, the main spring begins to age, the support effect becomes poor, the response time becomes slow, and at the same time, because the moving iron core has no special guiding structure, the friction is large, which is easy to increase wear and generate abnormal noises, and it is urgently needed to be improved. Summary of the Utility Model

[0005] Aiming at the deficiencies existing in the prior art, the utility model provides an automotive air suspension solenoid valve, which is used to solve the problems that most of the existing automotive air suspension solenoid valves use a main spring to support the moving iron core to move in the magnetic isolation sleeve and the valve seat, resulting in slow response time, increased wear and abnormal noise after long-term use.

[0006] To solve the above technical problems, the utility model provides the following technical solutions:

[0007] An automotive air suspension solenoid valve includes a static iron core, a moving iron core, a valve seat and an air port body. A magnetic isolation sleeve is fixedly sleeved between the static iron core and the valve seat. The magnetic isolation sleeve and the valve seat are movably sleeved on the surface of the moving iron core. A guide groove is axially arranged on the inner wall of the valve seat. A convex rib is arranged on the outer wall of the moving iron core. The convex rib is slidably connected with the guide groove;

[0008] A through hole is axially arranged at one end of the moving iron core, and a mounting groove connected to the through hole is arranged at one end of the moving iron core corresponding to the static iron core, and an inner bushing, a main spring 1 and a main spring 2 are respectively arranged in the mounting groove, the inner bushing is fixedly connected to the through hole, the main spring 1 is movably sleeved on the surface of the inner bushing, and the main spring 2 is movably sleeved on the surface of the main spring 1, the spiral directions of the main spring 1 and the main spring 2 are opposite, the cross-sectional radius of the main spring 1 is smaller than the cross-sectional radius of the main spring 2, and the ends of the main spring 1 and the main spring 2 are both supported on the side of the static iron core;

[0009] A rubber head frame is fixedly installed on the end of the moving iron core facing away from the static iron core, a rubber head body is sleeved on the surface of the rubber head frame, a side of the rubber head body facing away from the moving iron core is supported on the end of the air port body, a rubber head clamp is sleeved on the surface of the rubber head body, a secondary spring is installed between the rubber head clamp and the air port body, an air port sleeve is fixedly installed between the valve seat and the air port body, air holes are arranged on the outer wall of the air port sleeve, and the air port sleeve is movably sleeved on the outside of the moving iron core and the secondary spring.

[0010] Preferably, there are two guide grooves and two convex ridges, which are symmetrically arranged with the axis of the moving iron core as the symmetry axis.

[0011] Preferably, the longitudinal sections of the guide groove and the ridge are both V-shaped, and the side wall angle of the ridge is smaller than the inner wall angle of the guide groove.

[0012] Preferably, the inner sleeve is a nylon sleeve, and the inner sleeve is fixedly installed by a thread on one end surface and an inner wall thread of the through hole, and the inner sleeve and one end of the moving iron core corresponding to the static iron core are located in the same vertical plane.

[0013] Preferably, the surface of the inner sleeve is slidably connected to the main spring 1, and the main spring 2 is slidably connected to the inner wall of the mounting groove.

[0014] Preferably, the rubber head frame is plugged and installed with the through hole, and a frame clamp is sleeved on the surface of the rubber head frame, and the frame clamp is fixedly sleeved on the surface of one end of the moving iron core corresponding to the rubber head frame.

[0015] Preferably, there are a plurality of air holes, and the air holes are equidistantly arranged along the circumferential direction at positions on the outer wall of the air port sleeve corresponding to the ends of the air port body.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] A set of main springs is formed by main springs 1 and 2 with opposite spiral directions. On the basis of a single main spring, the response speed is improved, the force of a single main spring is reduced, and aging is delayed, ensuring that a faster response speed is still maintained after long-term use;

[0018] Guide the first main spring through the inner lining sleeve and the second main spring through the installation groove to reduce the radial deformation of the first and second main springs, thereby preventing the moving iron core from having radial displacement and improving stability;

[0019] In addition, further guide and limit the movement of the moving iron core through the guide groove and convex rib, and reduce the outer wall contact area, reduce the frictional resistance, reduce wear and noise, and also improve the response speed;

[0020] The cooperation of each component solves the problem that most of the existing automotive air suspension solenoid valves use a single main spring to support the moving iron core to move in the magnetic isolation sleeve and valve seat, resulting in a slow response time, increased wear and abnormal noise after long-term use. Description of the Drawings

[0021] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 Front sectional view of the present utility model;

[0023] Figure 3 Front sectional view of the inner lining sleeve, the first main spring and the second main spring of the present utility model;

[0024] Figure 4 Front view of the first main spring and the second main spring of the present utility model;

[0025] Figure 5 Front view of the moving iron core of the present utility model;

[0026] Figure 6 Front sectional view of the valve seat of the present utility model;

[0027] Figure 7 Side sectional view at the position of the corresponding convex rib of the valve seat and the moving iron core of the present utility model.

[0028] In the figure: 1. Static iron core; 2. Moving iron core; 201. Convex rib; 202. Through hole; 203. Installation groove; 3. Valve seat; 301. Guide groove; 4. Air port body; 5. Magnetic isolation sleeve; 6. Inner lining sleeve; 7. First main spring; 8. Second main spring; 9. Rubber head skeleton; 10. Rubber head body; 11. Rubber head hoop; 12. Auxiliary spring; 13. Air port sleeve; 1301. Air hole; 14. Skeleton hoop. Detailed Implementation Manner

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figure 1-7 shown, the present invention provides a technical solution: an automotive air suspension solenoid valve, which includes a stationary iron core 1, a moving iron core 2, a valve seat 3 and an air port body 4. A magnetic isolation sleeve 5 is fixedly sleeved between the stationary iron core 1 and the valve seat 3. The magnetic isolation sleeve 5 and the valve seat 3 are movably sleeved on the surface of the moving iron core 2. A guide groove 301 is axially provided on the inner wall of the valve seat 3. A convex rib 201 is provided on the outer wall of the moving iron core 2. The convex rib 201 is slidably connected to the guide groove 301. There are two guide grooves 301 and convex ribs 201, and they are symmetrically arranged with the axis of the moving iron core 2 as the axis of symmetry respectively. The longitudinal sections of the guide groove 301 and the convex rib 201 are both V-shaped, and the side wall angle of the convex rib 201 is smaller than the inner wall angle of the guide groove 301, which improves the guiding effect, improves the stability, reduces the contact area, and reduces the frictional resistance.

[0031] A through hole 202 is axially provided at one end of the moving iron core 2. An installation groove 203 communicating with the through hole 202 is provided at the end of the moving iron core 2 corresponding to the stationary iron core 1. A lining sleeve 6, a first main spring 7 and a second main spring 8 are respectively arranged in the installation groove 203. The lining sleeve 6 is fixedly connected to the through hole 202. The first main spring 7 is movably sleeved on the surface of the lining sleeve 6. The second main spring 8 is movably sleeved on the surface of the first main spring 7. The spiral directions of the first main spring 7 and the second main spring 8 are opposite. The cross-sectional radius of the first main spring 7 is smaller than the cross-sectional radius of the second main spring 8. A set of main springs is composed of the first main spring 7 and the second main spring 8 with opposite spiral directions, ensuring that the solenoid valve still maintains a fast rebound response speed after long-term operation, and the ends of the first main spring 7 and the second main spring 8 both support on the side of the stationary iron core 1.

[0032] The lining sleeve 6 is a nylon sleeve. The lining sleeve 6 is fixedly installed on the inner wall of the through hole 202 by the thread on the surface of one end. The end of the lining sleeve 6 and the moving iron core 2 corresponding to the stationary iron core 1 are located in the same vertical plane. The surface of the lining sleeve 6 is slidably connected to the first main spring 7. The second main spring 8 is slidably connected to the inner wall of the installation groove 203, which improves the guiding effect of the first main spring 7 and the second main spring 8 and ensures that it still has high stability after long-term use.

[0033] One end of the moving iron core 2 facing away from the static iron core 1 is fixedly installed with a rubber head skeleton 9. The rubber head skeleton 9 is inserted and installed in the through hole 202, and a skeleton hoop 14 is sleeved on the surface of the rubber head skeleton 9. The skeleton hoop 14 is fixedly sleeved on the surface of the moving iron core 2 at the end corresponding to the rubber head skeleton 9. A rubber head body 10 is sleeved on the surface of the rubber head skeleton 9, and one side of the rubber head body 10 facing away from the moving iron core 2 supports at the end of the air port body 4.

[0034] A rubber head hoop 11 is sleeved on the surface of the rubber head body 10. A secondary spring 12 is installed between the rubber head hoop 11 and the air port body 4. An air port sleeve 13 is fixedly installed between the valve seat 3 and the air port body 4. Air holes 1301 are provided on the outer wall of the air port sleeve 13. There are multiple air holes 1301, and the air holes 1301 are equidistantly arranged along the circumferential direction at the position of the outer wall of the air port sleeve 13 corresponding to the end of the air port body 4. The air port sleeve 13 is movably sleeved outside the moving iron core 2 and the secondary spring 12.

[0035] Working principle: When the coil (not shown in the figure) outside the static iron core 1 is energized, the static iron core 1 generates a magnetic field, driving the moving iron core 2 to move leftward under the guiding action of the guide groove 301 and the convex rib 201. The main spring one 7 and the main spring two 8 contract. The moving iron core 2 drives the rubber head body 10 to separate from the air port body 4 through the rubber head skeleton 9. The secondary spring 12 has the function of auxiliary support to improve the separation response speed. At this time, the air port body 4 is opened; when the coil outside the static iron core 1 is powered off and the generated magnetic field disappears, the main spring one 7 and the main spring two 8 support the moving iron core 2 and the rubber head body 10 to reset. The rubber head body 10 blocks the channel of the air port body 4. At this time, the air port body 4 is closed.

[0036] Among them, the main spring one 7 and the main spring two 8 form a set of main springs with opposite spiral directions, which have the effect of offsetting radial deformation, better support effect, faster response, reducing the force on a single main spring, delaying aging, ensuring a faster response speed after long-term use. The inner lining sleeve 6 guides the main spring one 7, and the installation groove 203 guides the main spring two 8, reducing the radial deformation of the main spring one 7 and the main spring two 8, avoiding radial displacement of the moving iron core 2, improving stability. The guide groove 301 and the convex rib 201 further guide and limit the movement of the moving iron core 2, reducing the contact area of the outer wall of the moving iron core 2, reducing the frictional resistance, reducing wear and noise, and at the same time improving the response speed.

Claims

1. An automobile air suspension solenoid valve, comprising a static iron core (1), a moving iron core (2), a valve seat (3) and an air port body (4), characterized in that: A magnetic isolation sleeve (5) is fixedly sleeved between the static iron core (1) and the valve seat (3); the magnetic isolation sleeve (5) and the valve seat (3) are movably sleeved on the surface of the moving iron core (2); a guide groove (301) is axially arranged on the inner wall of the valve seat (3); a convex ridge (201) is arranged on the outer wall of the moving iron core (2); and the convex ridge (201) is slidably connected to the guide groove (301); A through hole (202) is axially arranged at one end of the moving iron core (2), and a mounting groove (203) connected to the through hole (202) is arranged at one end of the moving iron core (2) corresponding to the static iron core (1), and an inner sleeve (6), a main spring 1 (7) and a main spring 2 (8) are respectively arranged in the mounting groove (203), the inner sleeve (6) is fixedly connected to the through hole (202), the main spring 1 (7) is movably sleeved on the surface of the inner sleeve (6), and the main spring 2 (8) is movably sleeved on the surface of the main spring 1 (7), the spiral directions of the main spring 1 (7) and the main spring 2 (8) are opposite, the cross-sectional radius of the main spring 1 (7) is smaller than the cross-sectional radius of the main spring 2 (8), and the ends of the main spring 1 (7) and the main spring 2 (8) are both supported on the side of the static iron core (1); A rubber head frame (9) is fixedly installed on the end of the moving iron core (2) facing away from the static iron core (1), and a rubber head body (10) is sleeved and installed on the surface of the rubber head frame (9). The side of the rubber head body (10) facing away from the moving iron core (2) is supported on the end of the air port body (4), and a rubber head clamp (11) is sleeved and installed on the surface of the rubber head body (10). A secondary spring (12) is installed between the rubber head clamp (11) and the air port body (4). An air port sleeve (13) is fixedly installed between the valve seat (3) and the air port body (4), and an air hole (1301) is provided on the outer wall of the air port sleeve (13). The air port sleeve (13) is movably sleeved on the outside of the moving iron core (2) and the secondary spring (12).

2. The automobile air suspension solenoid valve according to claim 1, characterized in that: The guide grooves (301) and the ridges (201) are both in two numbers and are symmetrically arranged with the axis of the moving iron core (2) as the symmetry axis.

3. The automobile air suspension solenoid valve according to claim 2, characterized in that: The longitudinal sections of the guide groove (301) and the convex ridge (201) are both V-shaped, and the side wall angle of the convex ridge (201) is smaller than the inner wall angle of the guide groove (301).

4. The automobile air suspension solenoid valve according to claim 1, characterized in that: The inner sleeve (6) is a nylon sleeve, and the inner sleeve (6) is fixedly installed with the inner wall thread of the through hole (202) through the thread on one end surface, and the inner sleeve (6) and one end of the moving iron core (2) corresponding to the static iron core (1) are located in the same vertical plane.

5. The automobile air suspension solenoid valve according to claim 1, characterized in that: The surface of the inner sleeve (6) is slidably connected to the main spring 1 (7), and the main spring 2 (8) is slidably connected to the inner wall of the mounting groove (203).

6. The automobile air suspension solenoid valve according to claim 1, characterized in that: The rubber head frame (9) is plugged and installed with the through hole (202), and the surface of the rubber head frame (9) is sleeved with a frame clamp (14), and the frame clamp (14) is fixedly sleeved on the surface of the moving iron core (2) corresponding to one end of the rubber head frame (9).

7. The automobile air suspension solenoid valve according to claim 1, characterized in that: There are a plurality of air holes (1301), and the air holes (1301) are arranged equidistantly along the circumferential direction at positions on the outer wall of the air port sleeve (13) corresponding to the ends of the air port body (4).

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