An electromagnetic valve

Abstract

The utility model discloses an electromagnetic valve, include: dynamic subassembly, including the armature, guide seat and sealing body that set gradually in the direction of electromagnet to work mouth, and the air gap L is formed between armature and electromagnet, guide seat is butt -jointed with armature axially, and is equipped with guide hole and with the accommodation space that guide hole intercommunication, and sealing body is equipped with the guide portion of extension through guide hole, and the guide portion end is connected with the stop piece that is accommodated in the accommodation space, and the reset spring is arranged between armature and electromagnet, and the lifting spring is arranged between sealing body and valve seat, and its elastic force direction is contrary with reset spring, when electromagnet is powered off, reset spring drives guide seat to axially press sealing body to obtain the position state of sealed work mouth, under this position state, the stop piece and the accommodation space are close to the side of work mouth and form the axial clearance H1, the axial length of axial clearance H1 is less than the axial length of air gap L, has the compact structure's characteristics, the utility model relates to the technical field of automobile parts.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and more specifically to a solenoid valve. Background Technology

[0002] In the existing technology, solenoid valves play a vital role in various industries and systems, especially in the field of gas control.

[0003] For example, in the application of solenoid valves in automotive air suspension systems, a solenoid valve generally includes an electromagnet, a moving component, a sealing body, and a valve seat. The moving component is connected to a return spring, and the moving component is kinetically connected to the sealing body. The valve seat is provided with a working port that communicates with functional components (such as airbags).

[0004] By energizing or de-energizing an electromagnet, the braking component is controlled to open or close the working port of the sealing body, thereby precisely controlling the inflation and deflation of the airbag and adjusting the vehicle height and shock absorption stiffness.

[0005] Existing solenoid valves have the following defects during the opening or closing of the working port:

[0006] 1. When the sealing orifice diameter of a conventional two-position normally closed solenoid valve is large, the solenoid valve is in the closed state. The armature assembly is affected by the pressure difference between the inlet and outlet of the solenoid valve, which can easily cause the armature assembly to generate a self-locking effect due to the pressure difference.

[0007] 2. The solenoid valve has a noise reduction structure for opening and closing, which results in excessive product noise. Utility Model Content

[0008] To address the shortcomings and defects of existing technologies, a solenoid valve with a pilot structure, high sealing performance, low noise, and stable and reliable operation is provided.

[0009] A solenoid valve, comprising:

[0010] The housing includes an electromagnet and a valve seat, the valve seat having a working port;

[0011] The moving assembly includes an armature, a guide seat, and a sealing body arranged sequentially along the direction from the electromagnet to the working port.

[0012] An air gap L is formed between the armature and the electromagnet;

[0013] The guide seat is axially connected to the armature and is provided with a guide hole and an accommodating space communicating with the guide hole;

[0014] The sealing body is provided with a guide portion extending through the guide hole, and the end of the guide portion is connected to a stop member that is accommodated in the accommodating space;

[0015] A return spring is provided between the armature and the electromagnet.

[0016] A lifting spring is provided between the sealing body and the valve seat, and the direction of its elastic force is opposite to that of the return spring.

[0017] When the electromagnet is de-energized, the reset spring drives the guide seat to axially press against the sealing body to obtain the sealing working port position. In this position, the stop and the accommodating space form an axial gap H1 on the side near the working port.

[0018] The axial length of the axial gap H1 is less than the axial length of the air gap L.

[0019] With the above structure, the solenoid valve of this utility model has the following advantages compared with the prior art: After the above arrangement, in the stage of energizing the electromagnet to open the working port of the sealing body, there are the following two possibilities:

[0020] 1. The armature is driven by the force of the electromagnet to move the guide seat upward. During this process, the lifting spring applies an upward force to the sealing body, causing the sealing body and the axial end face of the guide seat to keep against each other. The two move synchronously. Finally, the armature travels to the position of contact with the electromagnet. The lifting spring maintains the distance between the sealing body and the working port, keeping the working port open. The axial clearance H1 remains consistent after the working port is opened and when the working port is closed.

[0021] 2. Under the influence of the electromagnet, the armature drives the guide seat to move upward before the sealing body. When it moves until the axial clearance H1 disappears (the bottom of the stop contacts the bottom end face of the accommodating space), it can drive the sealing body upward, so that the sealing body can obtain sufficient force to meet the requirement of effectively opening the working port.

[0022] After the working port is effectively opened, the lifting spring applies an upward force to the sealing body, causing the sealing body to maintain pressure against the axial end face of the guide seat. Finally, the armature is in contact with the electromagnet, and the lifting spring maintains the distance between the sealing body and the working port, maintaining the open state of the working port. The axial clearance H1 remains consistent after the working port is opened and when the working port is closed.

[0023] The structural arrangement between the guide seat and the sealing body in this application is simple and compact, which reduces the required assembly space in the axial direction and facilitates the miniaturization of the device.

[0024] As an improvement of this utility model, when the sealing body is in the position of sealing the working port, the stop and the accommodating space on the side away from the working port form an axial gap H2.

[0025] As an improvement of this utility model, the axial end face of the guide seat is provided with a groove, and the groove is disposed opposite to the axial end face of the armature.

[0026] The accommodating space is formed between the bottom wall of the groove and the axial end face of the armature.

[0027] As an improvement of this utility model, the stop is a metal ring arranged around the guide part.

[0028] As an improvement of this utility model, a first flange is provided on the outer periphery of the sealing body, and a second flange is provided on the valve seat opposite to the first flange.

[0029] The lifting spring is sleeved on the outside of the sealing body, with one end abutting against the first flange and the other end abutting against the second flange.

[0030] As an improvement of this utility model, a washer is provided between the electromagnet and the armature.

[0031] As an improvement of this utility model, the upper end face of the armature is provided with an embedding groove, the washer is partially embedded in the embedding groove, and its upper end protrudes from the upper end face of the armature.

[0032] As an improvement of this utility model, the lower end face of the electromagnet is provided with a protruding contact portion, the surface area of ​​the lower end face of the contact portion is smaller than the surface area of ​​the lower end face of the electromagnet, so as to contact the upper end face of the armature when the armature moves upward.

[0033] As an improvement of this utility model, the sealing body is provided with an elastic sealing element, which is configured to cooperate with the working port.

[0034] As an improvement of this utility model, the stop and guide part, as well as the armature and guide seat are fixed by laser welding. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this utility model.

[0036] Figure 2 This is the utility model Figure 1 A schematic diagram of the cross-sectional structure along the AA direction, showing the working port in the closed state.

[0037] Figure 3 This utility model shows a cross-sectional view of the working port in the open state.

[0038] Figure 4 This is a partial enlarged structural schematic diagram of the present invention, showing the position of the baffle when the working port is in a sealed state.

[0039] Figure 5 This is a partial enlarged structural schematic diagram of the present invention, showing the working port in the closed state.

[0040] Figure 6 This is a utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0041] Figure 7 This is a three-dimensional structural diagram of the present invention.

[0042] The figure shows: 1. Housing; 1.1 Assembly space; 1.2 Air port; 2. Valve seat; 2.1 Working port; 2.2 Second flange; 3. Sealing body; 3.1 Guide part; 3.11 Stop; 3.2 First flange; 3.3 Assembly groove; 4. Return spring; 5. Moving assembly; 5.1 Armature; 5.11 Connecting part; 5.12 Spring groove; 5.13 Embedded groove; 5.2 Guide seat; 5.21 Guide hole; 5.22 Groove; 5.23 Accommodating space; 6. Lifting spring; 7. Sealing element; 8. Electromagnet; 8.1 Contact part; 9. Washer. Detailed Implementation

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] Please see Figure 1-3 As shown,

[0045] A solenoid valve, comprising:

[0046] The housing 1 has an axially extending assembly space 1.1, the electromagnet 8 is fixed at the upper end of the assembly space 1.1, the valve seat 2 is fixed at the lower end of the assembly space 1.1, and the valve seat 2 has a working port 2.1.

[0047] An air port 1.2 is provided on the housing 1 at the position corresponding to the working port 2.1.

[0048] The moving assembly 5 includes an armature 5.1, a guide seat 5.2, and a sealing body 3, arranged sequentially along the direction from the electromagnet 8 to the working port 2.1.

[0049] An air gap L is formed between the armature 5.1 and the electromagnet 8, and the air gap L is the amount of upward displacement that the armature 5.1 can make.

[0050] The guide seat 5.2 is axially connected to the armature 5.1, and is provided with a guide hole 5.21 and an accommodating space 5.23 communicating with the guide hole 5.21;

[0051] The sealing body 3 is axially opposite to the working port 2.1. When the sealing body 3 closes the working port 2.1, it can cut off the connection between the air port 1.2 and the working port 2.1. When the sealing body 3 opens the working port 2.1, the air port 1.2 and the working port 2.1 are connected.

[0052] The sealing body 3 is provided with a guide portion 3.1 extending through the guide hole 5.21, and the end of the guide portion 3.1 is connected to a stop 3.11 that is accommodated in the accommodating space 5.23;

[0053] A return spring 4 is provided between the armature 5.1 and the electromagnet 8. A spring groove 5.12 can be provided in the center of the armature 5.1. The return spring 4 is partially placed in the spring groove 5.12, with its bottom end abutting against the bottom of the spring groove 5.12 and its upper end abutting against the lower end face of the electromagnet 8.

[0054] A lifting spring 6 is provided between the sealing body 3 and the valve seat 2, and the direction of its elastic force is opposite to that of the return spring 4.

[0055] When the electromagnet 8 is energized and applies a magnetic force to the armature 5.1, the armature 5.1 drives the guide seat 5.2 to move axially upward, so that the sealing body 3 is in a position to open the working port 2.1.

[0056] Please see Figure 2 , Figure 3 , Figure 4 As shown, when the electromagnet 8 is de-energized, the reset spring 4 drives the guide seat 5.2 to axially press against the sealing body 3 to obtain the sealing working port 2.1. In this position, the stop 3.11 and the accommodating space 5.23 form an axial gap H1 on the side near the working port 2.1.

[0057] The axial length of the axial gap H1 is less than the axial length of the air gap L.

[0058] After the above arrangement, when the electromagnet 8 is energized to open the working port 2.1 of the sealing body 3, the following two possibilities exist:

[0059] 1. The armature 5.1 is driven by the force of the electromagnet 8 to move the guide seat 5.2 upward. During this process, the lifting spring 6 applies an upward force to the sealing body 3, causing the sealing body 3 and the axial end face of the guide seat 5.2 to maintain pressure against each other. The two move synchronously. Finally, the armature 5.1 travels to the position of contact with the electromagnet 8. The lifting spring 6 maintains the distance between the sealing body 3 and the working port 2.1, keeping the working port 2.1 open. The axial clearance H1 remains consistent after the working port 2.1 is opened and when the working port 2.1 is closed.

[0060] 2. The armature 5.1, driven by the electromagnet 8, moves the guide seat 5.2 upward before the sealing body 3. When it moves until the axial clearance H1 disappears (the bottom of the stop 3.11 contacts the bottom end face of the accommodating space 5.23), it can drive the sealing body 3 upward, so that the sealing body 3 obtains sufficient force to meet the requirement of effectively opening the working port 2.1.

[0061] After the working port 2.1 is effectively opened, the lifting spring 6 applies an upward force to the sealing body 3, causing the sealing body 3 to maintain pressure against the axial end face of the guide seat 5.2. Finally, the armature 5.1 is in contact with the electromagnet 8, and the lifting spring 6 maintains the distance between the sealing body 3 and the working port 2.1, maintaining the open state of the working port 2.1. The axial clearance H1 remains consistent after the working port 2.1 is opened and when the working port 2.1 is closed.

[0062] The structural arrangement between the guide seat 5.2 and the sealing body 3 in this application is simple and compact, which reduces the required assembly space in the axial direction and facilitates the miniaturization of the device.

[0063] When the sealing body 3 is in the position of sealing the working port 2.1, the stop 3.11 and the side of the accommodating space 5.23 away from the working port 2.1 form an axial gap H2.

[0064] During the closing of the working port 2.1, the guide seat 5.2 and the seal achieve transmission only through the axial pressure between their opposite end faces, ensuring stable and reliable operation of the device.

[0065] In the second possibility during the opening of the working port 2.1, the axial clearance H2 will increase.

[0066] In some embodiments, the axial length of the accommodating space 5.23 is set to be greater than the combined length of the stop 3.11 and the guide 3.1. Through a simple structural arrangement, axial gaps H1 and H2 can be formed between the end faces of the stop 3.11 and the accommodating space 5.23.

[0067] Please see Figure 4 As shown, the axial end face of the guide seat 5.2 is provided with a groove 5.22, which is opposite to the axial end face of the armature 5.1.

[0068] The bottom wall of the groove 5.22 and the axial end face of the armature 5.1 form an accommodating space 5.23.

[0069] In some embodiments, the armature 5.1 and the guide seat 5.2 can both be cylindrical in structure and have the same diameter. The bottom of the armature 5.1 can be provided with a connecting part 5.11 with a reduced diameter. The upper end of the groove 5.22 is sleeved on the outside of the connecting part 5.11, and the bottom wall of the groove 5.22 and the bottom end face of the armature 5.1 form an accommodating space 5.23.

[0070] After the above improvements, the moving component 5 can be easily assembled into the assembly space 1.1 of the housing 1, and the structure is simple, the processing and assembly are less difficult, and the axial length of the moving component 5 is also shorter, making the structure more compact.

[0071] The stop 3.11 is a metal ring that surrounds the guide part 3.1.

[0072] In some embodiments, the guide part 3.1 may be a cylindrical structure, with the inner ring of the metal ring sleeved on the guide part 3.1 and fixed thereon, which has the characteristics of reliable structure and easy assembly.

[0073] The lower two end faces of the metal ring are flat, which increases the contact area under force and makes the metal ring more stable after contacting the bottom wall of the receiving groove.

[0074] Please see Figure 5 As shown, the sealing body 3 has a first flange 3.2 on its outer periphery, and the valve seat 2 has a second flange 2.2 opposite to the first flange 3.2.

[0075] The lifting spring 6 is sleeved on the outside of the sealing body 3, with one end abutting against the first flange 3.2 and the other end abutting against the second flange 2.2.

[0076] In some embodiments, the outer periphery of the sealing body 3 is radially cut to form a reduction portion.

[0077] The outer periphery of the valve seat 2 corresponding to the working port 2.1 is also radially cut to form a reduced portion.

[0078] The upper end of the lifting spring 6 is sleeved on the outside of the reduced portion of the sealing body 3 and abuts against the first flange 3.2, while the lower end is sleeved on the outside of the reduced portion of the valve seat 2 and abuts against the second flange 2.2. This allows the lifting spring 6 to be held in a preset assembly position, ensuring reliable operation and extending its service life.

[0079] Please see Figure 6 As shown, a washer 9 is provided between the electromagnet 8 and the armature 5.1.

[0080] Washer 9 acts as a buffer between electromagnet 8 and armature 5.1, reducing vibration and noise.

[0081] In some embodiments, the washer 9 may be made of an elastic material (e.g., rubber).

[0082] An embedding groove 5.13 is provided on the upper end face of the armature 5.1. The washer 9 is partially embedded in the embedding groove 5.13 and its upper end protrudes from the upper end face of the armature 5.1. This setting can reduce the axial length required for assembly and facilitate the miniaturization of the structure.

[0083] In some embodiments, the embedding groove 5.13 may be an annular groove structure and located on the upper end face of the armature 5.1 outside the spring groove 5.12.

[0084] Washer 9 is an annular structure that fits into the recessed groove 5.13, enabling the front end to provide a stable and reliable buffering effect.

[0085] The lower end face of the electromagnet 8 is provided with a protruding contact portion 8.1. The surface area of ​​the lower end face of the contact portion 8.1 is smaller than the surface area of ​​the lower end face of the electromagnet 8, so that it contacts the upper end face of the armature 5.1 when the armature 5.1 moves upward, thereby reducing the noise caused by the armature 5.1 striking the electromagnet 8 during the attraction process.

[0086] In some embodiments, the contact portion 8.1 can be an annular structure and is disposed near the outer periphery of the electromagnet 8. The lower end face of the contact portion 8.1 with a smaller surface area produces relatively less noise when in contact with the armature 5.1.

[0087] Please see Figure 5 As shown, the sealing body 3 is provided with an upwardly opening assembly groove 3.3, and an elastic sealing element 7 is provided in the assembly groove 3.3. The sealing element 7 is configured to cooperate with the working port 2.1. The elastic element can improve the sealing performance of the working port 2.1 and prevent media leakage.

[0088] Please see Figure 1 , Figure 2 , Figure 7 As shown, the stop 3.11 and the guide part 3.1, as well as the armature 5.1 and the guide seat 5.2, are fixed by laser welding. The laser welding process allows for automated processing and ensures a stable connection.

[0089] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A solenoid valve, characterized in that, include: The housing (1) is provided with an electromagnet (8) and a valve seat (2), wherein the valve seat (2) has a working port (2.1); The moving assembly (5) includes an armature (5.1), a guide seat (5.2), and a sealing body (3) arranged sequentially along the direction from the electromagnet (8) to the working port (2.1). An air gap L is formed between the armature (5.1) and the electromagnet (8); The guide seat (5.2) is axially connected to the armature (5.1) and is provided with a guide hole (5.21) and an accommodating space (5.23) communicating with the guide hole (5.21). The sealing body (3) is provided with a guide part (3.1) extending through the guide hole (5.21), and the end of the guide part (3.1) is connected to a stop (3.11) that is accommodated in the accommodating space (5.23). A return spring (4) is provided between the armature (5.1) and the electromagnet (8). A lifting spring (6) is provided between the sealing body (3) and the valve seat (2), and the direction of its elastic force is opposite to that of the return spring (4); When the electromagnet (8) is de-energized, the reset spring (4) drives the guide seat (5.2) to axially press against the sealing body (3) to obtain the position state of the sealing working port (2.1). In this position state, the stop (3.11) and the accommodating space (5.23) form an axial gap H1 on the side near the working port (2.1). The axial length of the axial gap H1 is less than the axial length of the air gap L.

2. The solenoid valve according to claim 1, characterized in that: When the sealing body (3) is in the position of sealing the working port (2.1), the stop (3.11) and the accommodating space (5.23) on the side away from the working port (2.1) form an axial gap H2.

3. The solenoid valve according to claim 1, characterized in that: The guide seat (5.2) has a groove (5.22) on its axial end face, and the groove (5.22) is opposite to the axial end face of the armature (5.1). The accommodating space (5.23) is formed between the bottom wall of the groove (5.22) and the axial end face of the armature (5.1).

4. A solenoid valve according to claim 1, characterized in that: The stop (3.11) is a metal ring arranged around the guide part (3.1).

5. A solenoid valve according to claim 1, characterized in that: The sealing body (3) is provided with a first flange (3.2) on its outer periphery, and the valve seat (2) is provided with a second flange (2.2) that is opposite to the position of the first flange (3.2). The lifting spring (6) is sleeved on the outside of the sealing body (3), with one end abutting against the first flange (3.2) and the other end abutting against the second flange (2.2).

6. A solenoid valve according to claim 1, characterized in that: A washer (9) is provided between the electromagnet (8) and the armature (5.1).

7. A solenoid valve according to claim 6, characterized in that: The upper end face of the armature (5.1) is provided with an embedding groove (5.13), and the washer (9) is partially embedded in the embedding groove (5.13) and its upper end protrudes from the upper end face of the armature (5.1).

8. A solenoid valve according to claim 1, characterized in that: The lower end face of the electromagnet (8) is provided with a protruding contact portion (8.1). The surface area of ​​the lower end face of the contact portion (8.1) is smaller than the surface area of ​​the lower end face of the electromagnet (8) so that it contacts the upper end face of the armature (5.1) when the armature (5.1) moves upward.

9. A solenoid valve according to claim 1, characterized in that: The sealing body (3) is provided with an elastic sealing element (7), which is configured to cooperate with the working port (2.1).

10. A solenoid valve according to claim 1, characterized in that: The stop (3.11) and guide (3.1), as well as the armature (5.1) and guide seat (5.2) are fixed by laser welding.

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