Electromagnetic valve

Abstract

The utility model provides an electromagnetic valve which comprises a valve sleeve and a valve element arranged in the valve sleeve, the valve sleeve protrudes inwards in the radial direction to be provided with a protruding face, and a through hole for the valve element to penetrate through is formed in the middle of the protruding face. The valve element comprises a core rod used for penetrating through the through hole, a connecting part located at one end of the core rod and a limiting part arranged at the end, away from the core rod, of the connecting part, the diameter of the connecting part is smaller than that of the through hole, the limiting part is in a frustum shape, the end, close to the connecting part, of the limiting part is a small end, and the end, away from the connecting part, of the limiting part is a large end. The valve element has a first state that the connecting part is located in the through hole so that the two sides of the protruding face can be communicated and a second state that the limiting part seals the through hole. According to the electromagnetic valve, the control stability and reliability of the electromagnetic valve are improved, and the service life of the electromagnetic valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of valves, and particularly to a solenoid valve. Background Art

[0002] At present, cars have almost become an essential means of transportation for every family. With the continuous improvement of people's living standards, the requirements for driving comfort and stability of cars are also getting higher and higher. The air suspension system can automatically adjust the body posture according to different road conditions and driving needs, meet the vehicle stability and passing performance on different road conditions, and improve driving comfort. Therefore, the birth of the air suspension is also an inevitable product of social development.

[0003] At present, most air suspension systems adopt air bags, air storage tanks, air compressors, etc., and adjust the stiffness and height of the suspension by controlling the air pressure in the air bag, while providing comfort and maintaining good operating performance.

[0004] Compared with traditional suspensions, the air suspension has a more complex structure, and the probability and frequency of its failure will be higher; air, as the power source for adjusting the height of the vehicle frame, also has higher sealing requirements for each relevant component, especially the solenoid valve, which is prone to valve jamming due to impurities in the air, and will also lead to a shortened service life of the air suspension structure due to poor stability and reliability.

[0005] In view of this, it is necessary to improve the existing solenoid valve to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a solenoid valve to solve the problems of poor stability and reliability of the existing solenoid valve.

[0007] To achieve the above purpose, the utility model provides a solenoid valve, which includes a valve sleeve and a valve core arranged in the valve sleeve. The valve sleeve is radially and inwardly protruded with a protruding surface, and a through hole for the valve core to pass through is arranged in the middle of the protruding surface. The valve core includes a core rod for passing through the through hole, a connecting portion at one end of the core rod, and a limiting portion arranged at the end of the connecting portion away from the core rod. The diameter of the connecting portion is smaller than that of the through hole, the limiting portion is in a frustum shape, and the end close to the connecting portion is the small end, and the end far from the connecting portion is the large end. The valve core has a first state in which the connecting portion is located in the through hole to communicate both sides of the protruding surface and a second state in which the limiting portion seals the through hole.

[0008] As a further improvement of the present utility model, the solenoid valve further includes a moving armature fixedly connected to one end of the core rod away from the limiting portion, and a static armature disposed at one end of the moving armature away from the core rod. The static armature is used to drive the moving armature and the valve core to move axially so that the valve core switches between the first state and the second state.

[0009] As a further improvement of the present utility model, the solenoid valve further includes a return spring abutted between the moving armature and the static armature.

[0010] As a further improvement of the present utility model, the static armature and the moving armature are both provided with receiving grooves for receiving the return spring.

[0011] As a further improvement of the present utility model, a fixing groove is provided in the middle of the moving armature, and the core rod is inserted into the fixing groove and is in interference fit with the moving armature.

[0012] As a further improvement of the present utility model, the solenoid valve further includes a coil and a valve body disposed around the static armature.

[0013] As a further improvement of the present utility model, the valve core further includes a support rib protruding radially outward from the connecting portion, and the support rib is used for clearance fit with the convex surface.

[0014] As a further improvement of the present utility model, the valve core further includes a first sealing gasket disposed on one side of the limiting portion facing the through hole, and the first sealing gasket is used for abutting against the convex surface when the valve core is in the second state.

[0015] As a further improvement of the present utility model, the valve core further includes a second sealing gasket disposed on one side of the limiting portion away from the through hole, and the solenoid valve further includes a sealing seat disposed in the valve sleeve. The sealing seat has a sealed flow port. When the valve core is in the first state, the second sealing gasket abuts against the sealed flow port. When the valve core is in the second state, the second sealing gasket is disengaged from the sealed flow port.

[0016] The beneficial effects of the present utility model are as follows: The solenoid valve of the present utility model realizes the opening and closing of different functional ports through the limiting portion, completely eliminates the problem of valve jamming caused by impurities in the air, greatly improves the control stability and reliability of the solenoid valve, and improves its service life. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the solenoid valve of the present utility model;

[0018] Figure 2 is a cross-sectional structural schematic diagram of the solenoid valve of the present utility model;

[0019] Figure 3 is a schematic structural view of the valve sleeve of the solenoid valve of the present utility model;

[0020] Figure 4 is a schematic sectional structural view of the valve sleeve of the solenoid valve of the present utility model;

[0021] Figure 5 is a schematic structural view of the valve core of the solenoid valve of the present utility model;

[0022] Figure 6 is a schematic structural view of the valve core of the solenoid valve of the present utility model from another angle. Detailed implementation manners

[0023] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Such as Figures 1 to 6As shown in the figure, the solenoid valve 100 of the present utility model includes a valve sleeve 1, a valve core 2 disposed within the valve sleeve 1, a moving armature 3, a stationary armature 4, a return spring 5 abutted between the moving armature 3 and the stationary armature 4, a coil 6 disposed around the stationary armature 4, a valve body 7, and a sealing seat 8 disposed within the valve sleeve 1.

[0027] As Figures 3 to 4 shown, the valve sleeve 1 is radially inwardly protruded with a protruding surface 11, and a through hole 12 for the valve core 2 to pass through is provided in the middle of the protruding surface 11. On the side walls of the valve sleeve 1 along the axial direction on both sides of the protruding surface 11, a T flow port 13 and an A flow port 14 are respectively provided. The T flow port 13 is provided on the side close to the moving armature 3, and the A flow port 14 is provided on the side close to the sealing seat 8. The A flow port 14 and the T flow port 13 can be communicated through the through hole 12.

[0028] The sealing seat 8 has a sealed flow port 81, also known as a P flow port. The P flow port can be communicated with the A flow port 14.

[0029] As Figure 5 and Figure 6 shown, the valve core 2 includes a core rod 21 for passing through the through hole 12, a connecting portion 22 at one end of the core rod 21, a limiting portion 23 provided at the end of the connecting portion 22 away from the core rod 21, a supporting rib 24 radially outwardly protruded from the connecting portion 22, a first sealing pad 25 provided on the side of the limiting portion 23 facing the through hole 12, and a second sealing pad 26 provided on the side of the limiting portion 23 away from the through hole 12.

[0030] Among them, the first sealing pad 25 and the second sealing pad 26 are fixed on the limiting portion 23 by a vulcanization process.

[0031] The moving armature 3 is fixedly connected to the end of the core rod 21 away from the limiting portion 23. In this embodiment, a fixing groove is provided in the middle of the moving armature 3, and the core rod 21 is inserted into the fixing groove and is in interference fit with the moving armature 3. In this embodiment, a fixing head 211 is provided at the end of the core rod 21 away from the connecting portion 22, and the fixing head 211 is inserted into the fixing groove for interference fit with the moving armature 3. Thus, when the moving armature 3 moves, the valve core 2 can be driven to move axially. Such a setting is beneficial to improving the smoothness problem of the movement of the valve core 2 within the valve sleeve 1, reducing the circumferential swing during the movement of the valve core 2, thereby reducing the risk of the centers of the first sealing pad 25 and the second sealing pad 26 at both ends of the valve core 2 deviating, and further solving the problem of poor sealing, and improving the control stability and reliability of the solenoid valve 100.

[0032] The static armature 4 is arranged at one end of the moving armature 3 away from the core rod 21, and the static armature 4 is used to drive the moving armature 3 and the valve core 2 to move axially so that the valve core 2 switches between the first state and the second state.

[0033] When the coil 6 is energized, it provides magnetic force to the static armature 4, and the valve body 7 is used to accommodate the coil 6 and the static armature 4.

[0034] Both the static armature 4 and the moving armature 3 are provided with receiving grooves 31 for receiving the return spring 5. The receiving grooves 31 on both sides can prevent the return spring 5 from moving radially, so as to realize the radial limit of the return spring 5.

[0035] The valve core 2 has a first state in which the connecting portion 22 is located in the through hole 12 to communicate both sides of the convex surface 11, and a second state in which the limiting portion 23 seals the through hole 12. When the coil 6 is not energized, the static armature 4 does not generate magnetic force. At this time, under the abutment of the return spring 5, the valve core 2 is in the first state.

[0036] The diameter of the connecting portion 22 is smaller than that of the through hole 12. When the valve core 2 is in the first state, the T flow port 13 and the A flow port 14 can be communicated through the through hole 12.

[0037] The support rib 24 is used for clearance fit with the convex surface 11. On the premise of ensuring the smooth relative movement of the valve core 2, the clearance with the convex surface 11 should be as small as possible, and at the same time, the flow rate requirement at the connection between the connecting portion 22 and the convex surface 11 should be ensured.

[0038] In addition, the support rib 24 makes the connecting portion 23 have sufficient strength and stiffness, so as to ensure that when press-fitting with interference, the valve core 2 will not be bent and deformed due to excessive force.

[0039] The number of the support ribs 24 can be two or more. Preferably, it is produced by a circumferential array arrangement. The shape of the support rib 24 includes but is not limited to a structure extending along the movement direction. The advantage of this structure is that the mechanism is simple, easy to process, and the gas flow is smooth.

[0040] The limiting portion 23 is in a frustum shape, and the end close to the connecting portion 22 is the small end, and the end far from the connecting portion 22 is the large end. The limiting portion 23 can play a role in sealing the through hole 12.

[0041] The first gasket 25 is used to abut against the convex surface 11 when the valve core 2 is in the second state.

[0042] When the valve core 2 is in the first state, the second gasket 26 abuts against the sealed flow port 81. When the valve core 2 is in the second state, the second gasket 26 is disengaged from the sealed flow port 81.

[0043] The solenoid valve 100 of the present utility model realizes the opening and closing of different functional ports through the limiting portion 23, completely eliminating the problem of valve jamming caused by impurities in the air, greatly improving the control stability and reliability of the solenoid valve 100, and extending its service life.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0045] The above-described embodiments merely represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A solenoid valve, characterized in that: The solenoid valve (100) comprises a valve sleeve (1), and a valve core (2) arranged in the valve sleeve (1); the valve sleeve (1) is provided with a convex surface (11) protruding radially inwardly; a through hole (12) for the valve core (2) to pass through is provided in the middle of the convex surface (11); the valve core (2) comprises a core rod (21) for passing through the through hole (12); a connecting portion (22) located at one end of the core rod (21); and a connecting portion (22) arranged at the connecting portion (22) away from the core rod ( The valve core (2) comprises a limiting portion (23) at one end of the connecting portion (21), the connecting portion (22) has a diameter smaller than the through hole (12), the limiting portion (23) is in a frustum shape, and the end close to the connecting portion (22) is a small end, and the end away from the connecting portion (22) is a large end, and the valve core (2) has a first state in which the connecting portion (22) is located in the through hole (12) so that the two sides of the convex surface (11) are connected, and a second state in which the limiting portion (23) seals the through hole (12).

2. The solenoid valve according to claim 1, characterized in that: The solenoid valve (100) further comprises a movable armature (3) fixedly connected to one end of the core rod (21) away from the limiting portion (23), and a stationary armature (4) arranged at one end of the movable armature (3) away from the core rod (21), wherein the stationary armature (4) is used to drive the movable armature (3) and the valve core (2) to move in the axial direction so that the valve core (2) switches between the first state and the second state.

3. The solenoid valve according to claim 2, characterized in that: The solenoid valve (100) further comprises a return spring (5) abutting between the movable armature (3) and the stationary armature (4).

4. The solenoid valve according to claim 3, characterized in that: The stationary armature (4) and the movable armature (3) are both provided with a receiving groove (31) for receiving the return spring (5).

5. The solenoid valve according to claim 2, characterized in that: A fixing groove is provided in the middle of the movable armature (3), and the core rod (21) is inserted into the fixing groove and is interference-fitted with the movable armature (3).

6. The solenoid valve according to any one of claims 2 to 5, characterized in that: The solenoid valve (100) further comprises a coil (6) and a valve body (7) arranged around the stationary armature (4).

7. The solenoid valve according to claim 1, characterized in that: The valve core (2) further comprises a supporting convex strip (24) protruding radially outward from the connecting portion (22), wherein the supporting convex strip (24) is used to be clearance-matched with the convex surface (11).

8. The solenoid valve according to claim 1, characterized in that: The valve core (2) further comprises a first sealing gasket (25) arranged on the side of the limiting portion (23) facing the through hole (12), wherein the first sealing gasket (25) is used to abut against the raised surface (11) when the valve core (2) is in the second state.

9. The solenoid valve according to claim 1, characterized in that: The valve core (2) further comprises a second sealing gasket (26) arranged on a side of the limiting portion (23) away from the through hole (12); the solenoid valve (100) further comprises a sealing seat (8) arranged in the valve sleeve (1); the sealing seat (8) has a sealing flow channel opening (81); when the valve core (2) is in a first state, the second sealing gasket (26) abuts against the sealing flow channel opening (81); when the valve core (2) is in a second state, the second sealing gasket (26) is separated from the sealing flow channel opening (81).

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