Plunger assembly for automobile electromagnetic valve

Abstract

The utility model belongs to the technical field of electromagnetic valves, and particularly relates to a plunger assembly for an automobile electromagnetic valve, which comprises a stainless steel plunger, an oil outlet channel is arranged in the stainless steel plunger, and an oil inlet communicated with the oil outlet channel is arranged on the stainless steel plunger close to a spring seat. The oil outlet channel comprises a first straight hole section, a flaring section and a second straight hole section which are communicated, the oil inlet hole is communicated with the first straight hole section, and the sealing ball is located in the second straight hole section. A snap spring; the reset spring is located between the sealing ball and the clamping spring. According to the utility model, through the arrangement of the sealing ball, the clamping spring and the reset spring, when the electromagnetic valve is in an open state, pressure oil can jack the sealing ball open and penetrate through the oil outlet channel, and when the electromagnetic valve is closed, the thrust of the pressure oil is not enough to push the sealing ball open, and the reset spring pushes the sealing ball to tightly abut against the inner wall of the flaring section for sealing; the problem of reverse flow is avoided, and the working safety of the electromagnetic valve is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic valves, and in particular relates to a plunger assembly for an automobile electromagnetic valve. Background Art

[0002] The automobile solenoid valve is an important part of the oil circuit system in the car. There is a closed cavity in the solenoid valve with through holes at different positions. Each hole is connected to a different oil pipe. There is a piston in the middle of the cavity and two electromagnets on both sides. The valve body will be attracted to the side where the magnet coil is energized. The different oil drain holes can be opened or closed by controlling the movement of the valve body.

[0003] The plunger type solenoid valve is a type of solenoid valve. The closing system of the plunger valve is composed of a stainless steel plunger, two upper and lower elastic sealing rings and a metal partition frame.

[0004] For the solenoid valve plunger assembly of the prior art, when the solenoid valve is closed, the stainless steel plunger returns to its original position to achieve sealing under the elastic force of the spring. However, due to the pressure difference, the pressure oil at the tail end of the stainless steel plunger can easily flow back, affecting the safety of the solenoid valve and easily causing oil leakage.

[0005] In order to solve the above problems, the present application proposes a plunger assembly for an automobile solenoid valve. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides a plunger assembly for an automobile solenoid valve, which has the characteristics of being easy to use and having high safety performance.

[0007] To achieve the above object, the utility model provides the following technical solution: a plunger assembly for an automobile solenoid valve, comprising a stainless steel plunger, an oil outlet passage in the stainless steel plunger, a spring seat fixed to the tail section of the stainless steel plunger, and an oil inlet hole communicating with the oil outlet passage at a position near the spring seat on the stainless steel plunger, and further comprising:

[0008] Sealing ball, the oil outlet passage comprises a No. 1 straight hole section, a flared section and a No. 2 straight hole section which are in communication, the oil inlet hole is in communication with the No. 1 straight hole section, the sealing ball is located in the No. 2 straight hole section, and the diameter of the sealing ball is larger than the inner diameter of the No. 1 straight hole section and smaller than the inner diameter of the No. 2 straight hole section;

[0009] A retaining ring, the retaining ring being installed in the second straight hole section;

[0010] A return spring is located between the sealed ball and the retaining spring.

[0011] As a preferred technical solution of the utility model, the inner wall of the second straight hole section is provided with an annular mounting groove for the retaining ring to be embedded in, and the outer wall of the retaining ring abuts against the inner wall of the annular mounting groove.

[0012] As a preferred technical solution of the present utility model, the retaining spring is a circular ring-shaped component and has a deformation notch on the retaining spring.

[0013] As a preferred technical solution of the utility model, auxiliary operation holes are provided on both sides of the deformation notch.

[0014] As a preferred technical solution of the utility model, it also includes:

[0015] A baffle, the baffle being attached to the tail end of the stainless steel plunger, and having a maintenance port at the tail end of the stainless steel plunger that is in communication with the first straight hole section;

[0016] A rubber block is fixed on the baffle and embedded in the maintenance opening.

[0017] As a preferred technical solution of the utility model, it also includes:

[0018] A rubber disc, the rubber disc being attached to the baffle;

[0019] A countersunk bolt has a threaded hole at the rear end of the stainless steel plunger. The countersunk bolt penetrates the rubber disc and the baffle and is screwed into the threaded hole by thread engagement.

[0020] As a preferred technical solution of the utility model, a sealing mechanism is also included, and the sealing mechanism includes:

[0021] A sealing ring, wherein the outer wall of the stainless steel plunger has two sealing grooves spaced apart from each other, and sealing rings are sleeved in both of the sealing grooves;

[0022] A support ring is sleeved in the sealing groove and is used to support the sealing ring.

[0023] As a preferred technical solution of the utility model, the sealing mechanism also includes:

[0024] Solid lubricating grease, wherein the outer wall of the stainless steel plunger has a lubricating groove between the two sealing grooves, and the solid lubricating grease is located in the lubricating groove.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] In the utility model, by providing a sealing ball, a retaining spring and a return spring, when the solenoid valve is in an open state, the pressure oil can push open the sealing ball and pass through the oil outlet channel. When the solenoid valve is closed, the thrust of the pressure oil is insufficient to push open the sealing ball, and the return spring pushes the sealing ball to tightly against the inner wall of the flared section for sealing, thus avoiding the problem of backflow and greatly improving the safety of the solenoid valve operation.

[0027] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the axonometric structure of the utility model;

[0030] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0031] Figure 3 For this utility model Figure 2 A is an enlarged structural diagram;

[0032] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure of the sealing mechanism;

[0033] Figure 5 For this utility model Figure 2 The enlarged structural diagram at B in FIG.

[0034] Figure 6 It is a schematic diagram of the axonometric structure of the retaining spring in the utility model.

[0035] In the figure: 1. Stainless steel plunger; 11. Spring seat; 12. Oil outlet channel; 121. No. 1 straight hole section; 122. Expanding section; 123. No. 2 straight hole section; 13. Oil inlet hole; 14. Maintenance port; 15. Threaded hole; 16. Sealing groove; 17. Lubrication groove; 18. Annular mounting groove; 2. Sealing ball; 3. Circlip; 31. Deformation notch; 32. Auxiliary operation hole; 4. Reset spring; 5. Sealing mechanism; 51. Sealing ring; 52. Support ring; 53. Solid lubricating grease; 6. Baffle; 7. Rubber block; 8. Rubber disc; 9. Countersunk bolt. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] See also Figure 1-Figure 6 The utility model provides the following technical solutions: a plunger assembly for an automobile solenoid valve, comprising a stainless steel plunger 1, an oil outlet channel 12 in the stainless steel plunger 1, a spring seat 11 fixed to the tail section of the stainless steel plunger 1, and an oil inlet hole 13 communicating with the oil outlet channel 12 at a position near the spring seat 11 on the stainless steel plunger 1, and also comprising: a sealing ball 2, a retaining spring 3 and a return spring 4.

[0038] Further, by Figure 1 and Figure 2 As shown, in this embodiment, the oil outlet channel 12 includes a No. 1 straight hole section 121, a flared section 122 and a No. 2 straight hole section 123, the oil inlet hole 13 is connected to the No. 1 straight hole section 121, the sealing ball 2 is located in the No. 2 straight hole section 123, and the diameter of the sealing ball 2 is larger than the inner diameter of the No. 1 straight hole section 121 and smaller than the inner diameter of the No. 2 straight hole section 123, the retaining spring 3 is installed in the No. 2 straight hole section 123, and the return spring 4 is located between the sealed ball 2 and the retaining spring 3. After adopting the above scheme, when in use, the stainless steel plunger 1 is located in the valve body of the solenoid valve, and through the provided sealing ball 2, retaining spring 3 and return spring 4, when the solenoid valve is in the open state, the pressure oil can push open the sealing ball 2 and pass through the oil outlet channel 12. When the solenoid valve is closed, the thrust of the pressure oil is not enough to push open the sealing ball 2, and the return spring 4 pushes the sealing ball 2 to tightly press against the inner wall of the flared section 122 for sealing, thereby avoiding the problem of backflow and greatly improving the safety of the solenoid valve.

[0039] Optionally, by Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the inner wall of the No. 2 straight hole section 123 is provided with an annular mounting groove 18 for the retaining ring 3 to be embedded, and the outer wall of the retaining ring 3 is against the inner wall of the annular mounting groove 18. By setting the annular mounting groove 18, the retaining ring 3 is clamped into the annular mounting groove 18, which can ensure the stability of the installation of the retaining ring 3.

[0040] Preferably, by Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, in this embodiment, the clamping spring 3 is a circular ring-shaped component and has a deformation notch 31 on the clamping spring 3. Through the deformation notch 31, the clamping spring 3 can be bent inward, so that the clamping spring 3 can be easily inserted into the annular mounting groove 18.

[0041] Preferably, by Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, in this embodiment, auxiliary operation holes 32 are provided on both sides of the deformation notch 31 . Through the provision of the auxiliary operation holes 32 , it is convenient to bend the retaining spring 3 inward with the help of tools, so as to facilitate the retaining spring 3 to be inserted into the annular mounting groove 18 .

[0042] Optionally, by Figure 1-Figure 3 As shown, in this embodiment, it also includes: a baffle 6 and a rubber block 7. The baffle 6 is attached to the tail end of the stainless steel plunger 1, and the tail end of the stainless steel plunger 1 has a maintenance port 14 that communicates with the first straight hole section 121. The rubber block 7 is fixed on the baffle 6 and embedded in the maintenance port 14. During operation, the baffle 6 is fixed to the tail end of the stainless steel plunger 1. At this time, the rubber block 7 is embedded in the maintenance port 14 for sealing to prevent oil leakage. When the solenoid valve is inspected, the baffle 6 can be removed, and the interior of the stainless steel plunger 1 can be easily inspected through the maintenance port 14.

[0043] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, it also includes: a rubber disc 8 and a countersunk bolt 9. The rubber disc 8 is attached to the baffle 6. A threaded hole 15 is provided at the tail end of the stainless steel plunger 1. The countersunk bolt 9 penetrates the rubber disc 8 and the baffle 6 and is screwed into the threaded hole 15 by threaded engagement. After adopting the above scheme, the baffle 6 is fixedly installed by the countersunk bolt 9. The installation is convenient and the installation stability is high. It is also convenient to disassemble the baffle 6. In addition, by setting the rubber disc 8, the stainless steel plunger 1 is in soft contact with the valve body during operation, which improves safety and avoids mechanical damage caused by rigid contact.

[0044] Preferably, by Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, a sealing mechanism 5 is also included, and the sealing mechanism 5 includes: a sealing ring 51 and a support ring 52. The outer wall of the stainless steel plunger 1 has two sealing grooves 16 distributed at intervals, and sealing rings 51 are sleeved in the two sealing grooves 16. The support ring 52 is sleeved in the sealing groove 16 to support the sealing ring 51. After adopting the above scheme, the stainless steel plunger 1 of the utility model is designed with double sealing rings 51, which ensures the sealing of the connection between the stainless steel plunger 1 and the valve body. The support ring 52 is used to support the sealing ring 51 to improve the stability of the sealing ring 51, thereby improving the sealing effect.

[0045] Preferably, by Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the sealing mechanism 5 also includes: solid lubricating grease 53. The outer wall of the stainless steel plunger 1 has a lubricating groove 17 between the two sealing grooves 16. The solid lubricating grease 53 is located in the lubricating groove 17. By setting the solid lubricating grease 53, the sliding friction between the stainless steel plunger 1 and the valve body can be reduced, the wear is reduced, and the service life of the stainless steel plunger 1 is extended. In addition, since the solid lubricating grease 53 is located on the inner side of the two sealing rings 51, the sealing rings 51 can also limit the solid lubricating grease 53 to prevent the solid lubricating grease 53 from overflowing, thereby ensuring the lubrication effect.

[0046] Components not described in detail herein are prior art.

[0047] Working principle and use process of the utility model: the stainless steel plunger 1 of the utility model is located in the valve body of the solenoid valve when in use. Through the provided sealing ball 2, retaining spring 3 and return spring 4, when the solenoid valve is in the open state, the pressure oil can push open the sealing ball 2 and pass through the oil outlet channel 12. When the solenoid valve is closed, the thrust of the pressure oil is insufficient to push open the sealing ball 2. The return spring 4 pushes the sealing ball 2 to closely abut against the inner wall of the flared section 122 for sealing, thus avoiding the problem of backflow and greatly improving the safety of the solenoid valve.

[0048] The stainless steel plunger 1 of the utility model is designed with double sealing rings 51, which ensures the sealing of the connection between the stainless steel plunger 1 and the valve body, and has solid lubricating grease 53 on the inner side of the two sealing rings 51, which can reduce the sliding friction between the stainless steel plunger 1 and the valve body, reduce wear, and extend the service life of the stainless steel plunger 1.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plunger assembly for an automobile solenoid valve, comprising a stainless steel plunger (1), an oil outlet passage (12) being provided in the stainless steel plunger (1), a spring seat (11) being fixed to the tail section of the stainless steel plunger (1), and an oil inlet hole (13) communicating with the oil outlet passage (12) being provided at a position close to the spring seat (11) on the stainless steel plunger (1), characterized in that: Also includes: A sealing ball (2), the oil outlet passage (12) comprising a first straight hole section (121), a flared section (122) and a second straight hole section (123) which are in communication with each other, the oil inlet hole (13) being in communication with the first straight hole section (121), the sealing ball (2) being located in the second straight hole section (123), and the diameter of the sealing ball (2) being larger than the inner diameter of the first straight hole section (121) and smaller than the inner diameter of the second straight hole section (123); A retaining spring (3), the retaining spring (3) being installed in the second straight hole section (123); A return spring (4), wherein the return spring (4) is located between the sealed ball (2) and the retaining spring (3).

2. The plunger assembly for an automobile solenoid valve according to claim 1, characterized in that: The inner wall of the second straight hole section (123) is provided with an annular mounting groove (18) for the retaining ring (3) to be embedded, and the outer wall of the retaining ring (3) abuts against the inner wall of the annular mounting groove (18).

3. The plunger assembly for an automobile solenoid valve according to claim 1, characterized in that: The clamping spring (3) is a circular ring-shaped component, and has a deformation notch (31) on the clamping spring (3).

4. The plunger assembly for an automobile solenoid valve according to claim 3, characterized in that: Auxiliary operation holes (32) are provided on both sides of the deformation notch (31).

5. The plunger assembly for an automobile solenoid valve according to claim 1, characterized in that: Also includes: A baffle (6), the baffle (6) being attached to the rear end of the stainless steel plunger (1), and having a maintenance port (14) at the rear end of the stainless steel plunger (1) that is in communication with the first straight hole section (121); A rubber block (7), the rubber block (7) being fixed on the baffle (6) and embedded in the maintenance opening (14).

6. The plunger assembly for an automobile solenoid valve according to claim 5, characterized in that: Also includes: A rubber disc (8), the rubber disc (8) being attached to the baffle (6); A countersunk bolt (9) is provided with a threaded hole (15) at the rear end of the stainless steel plunger (1); the countersunk bolt (9) penetrates the rubber disc (8) and the baffle (6) and is screwed into the threaded hole (15) by means of a threaded screwing method.

7. The plunger assembly for an automobile solenoid valve according to claim 1, characterized in that: It also includes a sealing mechanism (5), and the sealing mechanism (5) includes: A sealing ring (51), wherein the outer wall of the stainless steel plunger (1) has two sealing grooves (16) spaced apart from each other, and a sealing ring (51) is sleeved in each of the two sealing grooves (16); A support ring (52), the support ring (52) is sleeved in the sealing groove (16) and is used to support the sealing ring (51).

8. The plunger assembly for an automobile solenoid valve according to claim 7, characterized in that: The sealing mechanism (5) further comprises: Solid lubricating grease (53), wherein the outer wall of the stainless steel plunger (1) has a lubricating groove (17) between the two sealing grooves (16), and the solid lubricating grease (53) is located in the lubricating groove (17).

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