CDC damping control electromagnetic valve

Abstract

The utility model relates to the technical field of automobile damping adjustable shock absorbers, in particular to a CDC damping control electromagnetic valve which comprises a main valve sleeve, a main valve element, a pilot valve and a double-spring structure, and the main valve element and the pilot valve are both arranged in the main valve sleeve; the double-spring structure comprises a first-stage spring, a second-stage spring and a spring seat, and one end of the second-stage spring is connected with the main valve element; the spring seat is connected with the end, away from the main valve element, of the second-stage spring, a containing groove is formed in the spring seat, and the end, close to the main valve element, of the pilot valve is located in the containing groove. The first-stage spring is located in the containing groove, one end of the first-stage spring is connected with the spring seat, and the other end of the first-stage spring is connected with the pilot valve. And a through hole communicated with the accommodating groove is formed in the spring seat. The electromagnetic valve has the effect that it is guaranteed that the whole electromagnetic valve can work normally.

Description

Technical Field

[0001] This application relates to the technical field of automotive damping adjustable shock absorbers, and particularly to a CDC damping control solenoid valve. Background Art

[0002] A CDC damping control solenoid valve is a solenoid valve used in an automotive suspension system, and its main function is to control the damping force in the suspension system to provide better driving stability and riding comfort.

[0003] Currently, Chinese Patent No. CN115585210A discloses a double-spring structure solenoid valve with segmented damping control, including: an upper cover, an outer valve sleeve, a main valve core, a series double-spring structure, and a pilot valve. The upper cover is arranged at the oil inlet end of the outer valve sleeve, the main valve core is arranged in the outer valve sleeve and is in top contact with the upper cover. A support structure is arranged between the main valve core and the pilot valve, and a series double-spring structure in a compressed state is arranged between the main valve core and the support structure. The main valve core is pressed by the series double-spring structure; the series double-spring structure includes a soft spring and a hard spring, and the soft spring and the hard spring are connected in series; the end of the hard spring in the series double-spring structure is connected to the main valve core, and the end of the soft spring in the series double-spring structure is connected to the support structure; a spring seat is arranged between the soft spring and the hard spring. The spring seat is a cup-shaped structure and is sleeved on the inner side of one end of the hard spring; one end of the soft spring is arranged in the spring seat and is connected to the bottom plate of the spring seat.

[0004] Because the end of the soft spring far from the connection with the spring seat is outside the spring seat, when the soft spring deforms into a torsion spring, the soft spring cannot be well pressed into the spring seat, but twists outside the spring seat, and this will cause the series double-spring structure to not be able to well press the main valve core; thus, the solenoid valve cannot work properly. Utility Model Content

[0005] In order to ensure the normal operation of the overall solenoid valve, this application provides a CDC damping control solenoid valve.

[0006] A CDC damping control solenoid valve provided by this application adopts the following technical solutions:

[0007] A CDC damping control solenoid valve, comprising a main valve sleeve, a main spool, a pilot valve and a double-spring structure. The main spool and the pilot valve are both arranged inside the main valve sleeve. The double-spring structure includes a first-stage spring, a second-stage spring and a spring seat. One end of the second-stage spring is connected to the main spool. The spring seat is connected to the end of the second-stage spring away from the main spool. A receiving groove is formed on the spring seat. One end of the pilot valve close to the main spool is located inside the receiving groove. The first-stage spring is located inside the receiving groove. One end of the first-stage spring is connected to the spring seat and the other end is connected to the pilot valve. A through hole communicating with the receiving groove is formed on the spring seat.

[0008] By adopting the above technical solution, since the first-stage spring is inside the receiving groove, the receiving groove can limit the first-stage spring, so that the first-stage spring deforms inside the receiving groove. Therefore, the provided double-spring structure can ensure the normal operation of the overall solenoid valve.

[0009] Optionally, the spring seat includes a sleeve block, a connecting arc block and an outer edge block. The receiving groove and the through hole are both formed on the sleeve block. The connecting arc block is arranged on the sleeve block. The outer edge block is arranged on the connecting arc block. The sleeve block is located inside the second-stage spring. The outer edge block is connected to the second-stage spring.

[0010] By adopting the above technical solution, setting the sleeve block can limit the second-stage spring when the second-stage spring deforms, thereby reducing the phenomenon of the second-stage spring being distorted.

[0011] Optionally, the relative distance from the end of the outer edge block away from the connecting arc block to the sleeve block is greater than the relative distance from the outer side wall of the second-stage spring to the sleeve block.

[0012] By adopting the above technical solution, the relative distance from the end of the outer edge block away from the connecting arc block to the sleeve block is greater than the distance from the outer side wall of the second-stage spring to the sleeve block, which can prevent the second-stage spring from abutting against the pilot valve. Therefore, since the spring is generally made of steel and the pilot valve seat is made of copper, the provided outer edge block can act as a gasket to reduce the wear caused by the direct contact between the first-stage spring and the pilot valve.

[0013] Optionally, the sleeve block includes a first connection block, a second connection block, and a third connection block. The first connection block is connected to the connecting arc block. A first accommodation hole is formed in the first connection block, and one end of the pilot valve close to the main spool is located in the first accommodation hole. The second connection block is disposed at one end of the first connection block away from the connecting arc block. A second accommodation hole communicating with the first accommodation hole is formed in the second connection block. The third connection block is disposed at one end of the second connection block away from the first connection block. A first placement groove communicating with the second accommodation hole is formed in the third connection block. The through hole is formed in the third connection block and communicates with the first placement groove. One end of the first-stage spring away from the pilot valve is located in the first placement groove. The first accommodation hole, the second accommodation hole, and the first placement groove form the accommodation groove. The third connection block is located between the first connection block and the main spool.

[0014] Optionally, the cross-sectional area of the first placement groove is smaller than that of the second accommodation hole.

[0015] Optionally, the cross-sectional area of the second accommodation hole gradually decreases in a direction away from the cross-sectional area of the first accommodation hole.

[0016] By adopting the above technical solution, since the pilot valve connected to the first-stage spring is located in the first accommodation hole, when the first-stage spring is compressed, the pilot valve will move in the direction of the second connection block. In this way, the first-stage spring between the pilot valve and the third connection block will deform in the second accommodation cavity of the second connection block. The gradually decreasing cross-sectional area of the second accommodation hole can limit the deformed first-stage spring and reduce the phenomenon of the first-stage spring being distorted.

[0017] Optionally, a second placement groove is formed in the pilot valve, and one end of the first-stage spring away from the connection with the spring seat is located in the second placement groove.

[0018] By adopting the above technical solution, the second placement groove can limit the first-stage spring.

[0019] Optionally, the pilot valve includes a pilot valve seat, a pilot spool, and a pilot spring. Both the pilot valve seat and the pilot spool are located in the main valve sleeve, and the pilot valve seat is located between the pilot spool and the main spool. One end of the pilot spring is connected to the pilot valve seat and the other end is connected to the pilot spool. One end of the pilot valve seat close to the main spool is located in the accommodation groove, and the first-stage spring is connected to the pilot valve seat located in the accommodation groove.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The double-spring structure provided can ensure the normal operation of the entire solenoid valve.

[0022] 2. The outer edge block provided can act as a gasket to reduce the wear caused by the direct contact between the first-stage spring and the pilot valve. Brief Description of the Drawings

[0023] Figure 1 It is a cross-sectional view of the CDC damping control solenoid valve in the embodiment of the present application;

[0024] Figure 2 It is a schematic structural view of the receiving groove in the embodiment of the present application;

[0025] Figure 3 It is a schematic structural view of the spring seat in the embodiment of the present application.

[0026] Reference Numerals: 1, main valve sleeve; 2, main valve core; 3, pilot valve; 31, pilot valve seat; 311, second placement groove; 32, pilot valve core; 33, pilot spring; 4, double-spring structure; 41, first-stage spring; 42, second-stage spring; 5, spring seat; 51, outer edge block; 52, connecting arc block; 53, sleeve block; 531, first connecting block; 5311, first receiving hole; 532, second connecting block; 5321, second receiving hole; 533, third connecting block; 5331, through hole; 5332, first placement groove. Detailed Description of the Embodiment

[0027] The following will further describe the present application in detail Figures 1 - 3 with reference to the accompanying drawings.

[0028] The embodiment of the present application discloses a CDC damping control solenoid valve.

[0029] Refer to Figure 1 , a CDC damping control solenoid valve, including a main valve sleeve 1, a main valve core 2 and a pilot valve 3 are respectively arranged at both ends of the main valve sleeve 1, and a double-spring structure 4 connected to the pilot valve 3 is arranged on the main valve core 2.

[0030] Refer to Figure 1 , the pilot valve 3 includes a pilot valve seat 31 and a pilot valve core 32 arranged in the main valve sleeve 1, the pilot valve seat 31 is located between the pilot valve core 32 and the main valve core 2, and a pilot spring 33 connected to the pilot valve core 32 is arranged on the pilot valve seat 31.

[0031] Refer to Figure 1 and Figure 2 , the double-spring structure 4 includes a second-stage spring 42, one end of the second-stage spring 42 is connected to the main valve core 2, a spring seat 5 is arranged at the end of the second-stage spring 42 away from the main valve core 2, and a receiving groove is formed on the spring seat 5.

[0032] Refer toFigure 2 and Figure 3 The spring seat 5 includes a sleeve block 53 located inside the second-stage spring 42. The sleeve block 53 includes a cylindrical first connection block 531, and a first accommodation hole 5311 is formed in the first connection block 531. One end of the second connection block 532 is integrally provided with a frustum-shaped second connection block 532. The cross-section of the second connection block 532 gradually becomes smaller in the direction away from the first connection block 531, and the cross-section of the second connection block 532 close to the first connection block 531 is the same as the cross-section of the first connection block 531. A second accommodation hole 5321 communicating with the first accommodation hole 5311 is formed in the second connection block 532. The second accommodation hole 5321 gradually becomes smaller in the direction away from the first connection block 531, and the cross-section of the second accommodation hole 5321 close to the first accommodation hole 5311 is the same as the cross-section of the first accommodation hole 5311. One end of the second connection block 532 away from the first connection block 531 is integrally provided with a third connection block 533. The cross-section of the third connection block 533 is the same as the cross-section of the second connection block 532 at the end away from the first connection block 531. A first placement groove 5332 communicating with the second accommodation hole 5321 is formed in the third connection block 533, and a through hole 5331 communicating with the first placement groove 5332 is formed at one end of the third connection block 533 away from the second connection block 532. The first accommodation hole 5311 on the first connection block 531, the second accommodation hole 5321 on the second connection block 532, and the first placement groove 5332 on the third connection block 533 form an accommodation groove; and the first connection block 531, the second connection block 532, and the third connection block 533 are all located inside the second-stage spring 42. The third connection block 533 is located between the first connection block 531 and the main spool 2, and there is a certain distance between the third connection block 533 and the main spool 2.

[0033] Reference Figure 2 and Figure 3 One end of the first connection block 531 away from the second connection block 532 is integrally provided with a connecting arc block 52. One end of the connecting arc block 52 away from the first connection block 531 is integrally provided with an outer edge block 51. The cross-section of the outer edge block 51 is circular; the outer edge block 51 is connected to the end of the second-stage spring 42 away from the main spool 2, and the distance from the end of the outer edge block 51 away from the connecting arc block 52 to the first connection block 531 is greater than the distance from the outer side wall of the second-stage spring 42 to the first connection block 531, that is, the outer edge block 51 covers the second-stage spring 42.

[0034] Reference Figure 2 and Figure 3, one end of the pilot valve seat 31 close to the main spool 2 is located in the first accommodation hole 5311 of the first connection block 531, and a second placement groove 311 is formed in the pilot valve seat 31 located in the first accommodation hole 5311. The cross-section of the second placement groove 311 is the same as that of the first placement groove 5332. A first-stage spring 41 is installed in the third connection block 533. One end of the first-stage spring 41 is connected to the pilot valve seat 31 and is located in the second placement groove 311. The end of the first-stage spring 41 away from the pilot valve seat 31 is connected to the third connection block 533 and is located in the first placement groove 5332. The through hole 5331 corresponds to the inside of the first-stage spring 41.

[0035] The implementation principle of an embodiment of the present application is as follows: when the main spool 2 is closed, there is a distance between the end face of the pilot valve seat 31 and the end face of the outer edge block 51 on the side away from the main spool 2. The first-stage spring 41 and the second-stage spring 42 are in series, so that the main spool is always subjected to a small spring force, improving the consistency of the stroke when opening at low pressure.

[0036] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A CDC damping control solenoid valve, comprising a main valve sleeve (1), a main spool (2), a pilot valve (3) and a double spring structure (4), wherein the main spool (2) and the pilot valve (3) are both arranged in the main valve sleeve (1); characterized in that, The double-spring structure (4) includes a first-stage spring (41), a second-stage spring (42), and a spring seat (5). One end of the second-stage spring (42) is connected to the main spool valve (2); the spring seat (5) is connected to the end of the second-stage spring (42) away from the main spool valve (2). An accommodation groove is provided on the spring seat (5), and one end of the pilot valve (3) close to the main spool valve (2) is located in the accommodation groove; the first-stage spring (41) is located in the accommodation groove. One end of the first-stage spring (41) is connected to the spring seat (5) and the other end is connected to the pilot valve (3); a through hole (5331) communicating with the accommodation groove is provided on the spring seat (5).

2. The CDC damping control solenoid valve according to claim 1, characterized in that, The spring seat (5) includes a sleeve block (53), a connecting arc block (52), and an outer edge block (51). The accommodation groove and the through hole (5331) are both provided on the sleeve block (53). The connecting arc block (52) is provided on the sleeve block (53), and the outer edge block (51) is provided on the connecting arc block (52); the sleeve block (53) is located inside the second-stage spring (42), and the outer edge block (51) is connected to the second-stage spring (42).

3. The CDC damping control solenoid valve according to claim 2, characterized in that, The relative distance from the end of the outer edge block (51) away from the connecting arc block (52) to the sleeve block (53) is greater than the relative distance from the outer side wall of the second-stage spring (42) to the sleeve block (53).

4. The CDC damping control solenoid valve according to claim 2, wherein, The sleeve block (53) includes a first connecting block (531), a second connecting block (532), and a third connecting block (533). The first connecting block (531) is connected to the connecting arc block (52). A first accommodation hole (5311) is provided on the first connecting block (531), and one end of the pilot valve (3) close to the main spool valve (2) is located in the first accommodation hole (5311); the second connecting block (532) is provided on the end of the first connecting block (531) away from the connecting arc block (52). A second accommodation hole (5321) communicating with the first accommodation hole (5311) is provided on the second connecting block (532); the third connecting block (533) is provided on the end of the second connecting block (532) away from the first connecting block (531). A first placement groove (5332) communicating with the second accommodation hole (5321) is provided on the third connecting block (533). The through hole (5331) is provided on the third connecting block (533) and communicates with the first placement groove (5332); one end of the first-stage spring (41) away from the pilot valve (3) is located in the first placement groove (5332); the first accommodation hole (5311), the second accommodation hole (5321), and the first placement groove (5332) form the accommodation groove; the third connecting block (533) is located between the first connecting block (531) and the main spool valve (2).

5. The CDC damping control solenoid valve according to claim 4, wherein, The cross-sectional area of the first placement groove (5332) is smaller than the cross-sectional area of the second accommodation hole (5321).

6. A CDC damping control solenoid valve according to claim 4, characterized in that, The cross-section of the second receiving hole (5321) gradually becomes smaller towards the cross-section away from the first receiving hole (5311).

7. A CDC damping control solenoid valve according to claim 1, wherein A second placement groove (311) is formed in the pilot valve (3), and one end of the first-stage spring (41) away from the connection with the spring seat (5) is located in the second placement groove (311).

8. A CDC damping control solenoid valve according to claim 1, characterized in that The pilot valve (3) includes a pilot valve seat (31), a pilot valve core (32), and a pilot spring (33). Both the pilot valve seat (31) and the pilot valve core (32) are located within the main valve sleeve (1), and the pilot valve seat (31) is located between the pilot valve core (32) and the main valve core (2); one end of the pilot spring (33) is connected to the pilot valve seat (31) and the other end is connected to the pilot valve core (32); one end of the pilot valve seat (31) close to the main valve core (2) is located within the receiving groove, and the first-stage spring (41) is connected to the pilot valve seat (31) located within the receiving groove.

Images