Damping regulating valve

Abstract

The utility model discloses a damping regulating valve, which belongs to the technical field of automobile suspensions and comprises a valve body, a main valve, a first electromagnetic valve and a second electromagnetic valve are arranged on the valve body, the first electromagnetic valve and the second electromagnetic valve are communicated with the main valve, the first electromagnetic valve is connected with the second electromagnetic valve in parallel, and the main valve is communicated with a first oil inlet at the bottom of the first electromagnetic valve. The main valve is communicated with a second oil inlet in the side portion of the second electromagnetic valve, and the first electromagnetic valve is in normally-open connection with the main valve. The first electromagnetic valve and the main valve are connected through a normally-open hole and are kept in a normally-open state, oil enters the normally-open hole of the first electromagnetic valve after entering the main valve, the differential pressure flow characteristic of the main valve is adjusted by adjusting the size of a controllable hole of the first electromagnetic valve and adjusting an overflowing face in cooperation with the second electromagnetic valve, and the requirements of different vehicle types can be met; the damping valve is reasonable in structural arrangement, the overall size of the damping valve can be relatively reduced, the structure is simple, and the machining process difficulty of the valve body is lowered.

Description

TECHNICAL FIELD

[0001] The utility model relates to a regulating valve, more specifically, it relates to a damping regulating valve. BACKGROUND

[0002] In a vehicle suspension system, a damping valve is often used to adjust the suspension damping effect of the vehicle. With the advancement of technology, damping adjustment can be adjusted in multiple stages to achieve different damping characteristics and match different vehicle requirements. However, existing damping adjustment valves, especially multi-stage damping adjustment valves, have complex internal structures, resulting in a large overall size and increased manufacturing costs.

[0003] For example: Chinese patent publication No. CN217301395U, published on August 26, 2022, with the utility model name of a multi-stage damping valve and a shock absorber and suspension device with the damping valve, the application discloses a damping adjustment valve, which comprises a main valve body and a multi-stage pilot valve installed on the main valve body; the multi-stage pilot valve comprises at least a plurality of high-speed on-off electromagnetic valves arranged in parallel, wherein the high-speed on-off electromagnetic valves can be connected to the valve mounting part on the main valve body without gap, forming a plurality of parallel oil liquid passages, so that the multi-stage pilot valve adjusts the oil liquid flow capacity flowing through the multi-stage pilot valve in a way that the high-speed on-off electromagnetic valves can be selectively controlled. The high-frequency switching of the high-speed on-off electromagnetic valve realizes rapid adjustment of the multi-stage damping of the shock absorber; however, the internal structure of this scheme is complex, resulting in a large overall size of the damping valve and greatly increasing the manufacturing cost. Utility model content

[0004] The utility model overcomes the problem of complex structure and large size of the existing damping adjustment valve, and provides a damping adjustment valve. The overall size of the damping adjustment valve is relatively small, and the structure is simpler.

[0005] In order to solve the above technical problems, the utility model discloses the following technical scheme: a damping adjusting valve, including the valve body, be arranged with the main valve and with the main valve communication's first electromagnetic valve and second electromagnetic valve, first electromagnetic valve with second electromagnetic valve are connected in parallel, the bottom first oil inlet of main valve communication first electromagnetic valve, the side second oil inlet of main valve communication second electromagnetic valve, first electromagnetic valve with The main valve keeps always open connection. In the scheme, first electromagnetic valve includes a controllable hole and a always open hole, the main valve can be into the high pressure oil liquid to the valve body, and then flow to first electromagnetic valve and second electromagnetic valve, because first electromagnetic valve is connected between the main valve through always open hole, keeps always open state, after oil liquid enters into the main valve, will enter into the always open hole of first electromagnetic valve, through the controllable hole size of first electromagnetic valve, and cooperate second electromagnetic valve adjustment overflow surface, and then adjust the main valve pressure difference flow characteristics, can match the demand of different vehicle types. Among them, the first oil inlet is arranged at the bottom of the first electromagnetic valve, and the second oil inlet is arranged at the side of the second electromagnetic valve, the structure is reasonably arranged, the overall volume of the damping valve can be relatively reduced, the structure is simple, and the machining process difficulty of the valve body is reduced.

[0006] As preferred, the main valve includes a main valve body and a main valve core arranged in the inner cavity of the main valve body, one end of the main valve body is provided with a main oil inlet hole, the other end is provided with a main oil outlet hole, and a first spring is arranged between the main valve core and the main oil outlet hole of the main valve body. The main valve core can slide in the main valve body to realize the opening and closing of the main valve body; one end of the first spring is connected at the main oil outlet hole, and the other end is connected with the main valve core, so that the first spring can tightly push the main valve core at the position of the main oil inlet hole; only when the oil pressure at the main oil inlet hole of the main valve body increases, the oil can overcome the elastic force of the first spring to open the main valve core, thereby achieving the effect of damping and shock absorption.

[0007] As preferred, the main valve core is adapted to abut against the main oil inlet hole, a damping hole is arranged on the main valve core corresponding to the position of the main oil inlet hole, and a plurality of main oil return holes are arranged in the circumference of the main valve body. The main valve core can block the oil liquid of the main oil inlet hole from entering the inner cavity of the main valve body. In order to make the damping valve have a certain buffering and shock absorption effect when the oil pressure in the suspension system is relatively small, a damping hole is arranged at the position of the main oil inlet hole of the main valve core, so that when the oil pressure of the main oil inlet hole is not enough to open the main valve core, the oil liquid can enter the main valve core from the damping hole, thereby improving the damping and shock absorption effect of the damping valve; the main oil return hole can quickly release the pressure of the oil liquid when the oil pressure is relatively large, so that the car can quickly respond to the shock absorption effect under the condition of large vibration.

[0008] As preferred, the main valve is provided with an oil main path and an oil branch path branched from the oil main path, the oil main path is connected with the main oil outlet hole, and the oil branch path includes a first branch path leading to the first electromagnetic valve and a second branch path leading to the second electromagnetic valve. After the oil in the main oil inlet hole enters the main valve body cavity, it flows out from the main oil outlet hole, enters the main oil inlet path, and then flows to the first electromagnetic valve and the second electromagnetic valve through the first branch path and the second branch path respectively, so as to realize the step-by-step adjustment of damping.

[0009] As preferred, the first electromagnetic valve includes a first valve seat, the first valve seat is provided with a first through hole, a first valve cavity is formed between the first valve seat and the valve body, and the first through hole communicates the first branch path with the first valve cavity. The first through hole can be adjusted in size by the first electromagnetic valve, so as to change the flow area of the first through hole, and the oil enters the first valve cavity through the first through hole and is finally discharged from the valve body through the first valve cavity.

[0010] As preferred, the first valve seat is circumferentially provided with a plurality of first oil return holes, the valve body is provided with a first oil return path, and the first oil return path communicates the first oil return holes with the main oil return hole. The first oil return holes can discharge the oil entering the first electromagnetic valve back to the outlet end of the main oil return hole, so as to return the oil to the oil tank of the suspension system.

[0011] As preferred, the second electromagnetic valve includes a second valve seat, a second valve cavity is formed between the second valve seat and the valve body, the second valve seat is provided with a second through hole, and the second valve cavity communicates the second branch path with the second through hole. The second through hole in the second valve seat is normally blocked by the valve rod of the second electromagnetic valve, is controlled to be opened and closed by the electromagnet, and cooperates with the first electromagnetic valve to perform multi-stage adjustment on the flow characteristics of the damping valve.

[0012] As preferred, the main valve body is further provided with a second oil return path, and the second oil return path communicates the second through hole with the main oil return hole. The second oil return path can return the oil in the second valve cavity to the outlet end of the main oil return hole, so as to return the oil to the oil tank of the suspension system.

[0013] As preferred, the first valve seat is further provided with a constant through hole, and the constant through hole communicates the first branch path with the first valve cavity. The constant through hole is arranged on the first valve seat, can ensure that the first valve cavity of the first electromagnetic valve is always communicated with the main oil path, that is, the first valve cavity and the main valve body are always in a communication state, and can guide the oil flowing out of the main valve body into the first electromagnetic valve, thereby protecting the damping valve.

[0014] As preferred, the first electromagnetic valve is a normally open electromagnetic valve, and the second electromagnetic valve is a normally closed electromagnetic valve. The first electromagnetic valve is arranged as a normally open type, and can release the oil entering into the main oil way, thereby protecting the damping valve. The second electromagnetic valve is arranged as a normally closed type, and can adjust the flow characteristics of the damping valve in cooperation with the first electromagnetic valve.

[0015] Compared with the prior art, the damping valve has the advantages that: (1) the damping valve has a reasonable structure arrangement, can relatively reduce the overall size of the damping valve, has a simple structure, and reduces the machining process difficulty of the valve body; (2) the damping valve can realize multi-stage adjustment, adjust the main valve pressure difference flow characteristics, and match the requirements of different vehicle models; and (3) the valve body has a protection structure, and can protect the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of the damping valve.

[0017] Figure 2 is a top view of the damping valve.

[0018] Figure 3 is a Figure 2 sectional view in the direction of A-A.

[0019] Figure 4 is a Figure 3 enlarged schematic view of A.

[0020] Figure 5 is a Figure 2 sectional view in the direction of B-B.

[0021] Figure 6 is a front view of the damping valve.

[0022] Figure 7 is a bottom view of the damping valve.

[0023] In the diagram: 1. Valve body, 2. Main valve, 3. First solenoid valve, 4. Second solenoid valve, 5. First oil inlet, 6. Second oil inlet, 7. Main valve body, 8. Main valve core, 9. Main oil inlet, 10. Main oil outlet, 11. Damping orifice, 12. Main return oil orifice, 13. Main oil path, 14. First branch, 15. Second branch, 16. First valve seat, 17. First valve body, 18. First through hole, 19. First return oil path, 20. First return oil orifice, 21. Second valve seat, 22. Second... 23. Valve body, 24. First valve chamber, 25. Second valve chamber, 26. Second through hole, 27. Second return oil passage, 28. Normally through hole, 29. Main valve chamber, 30. Through hole, 31. Oil port seat, 32. Annular protrusion, 33. First spring, 34. Transition chamber, 35. First valve sleeve, 36. First fixing part, 37. First valve core, 38. Process hole, 39. Steel ball, 40. First valve stem, 41. Second valve sleeve, 42. Second valve stem, 43. Second fixing part, 44. Second valve core. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0025] Example 1: As Figures 1 to 7 The damping regulating valve shown includes a valve body 1. Inside the valve body 1 are a main valve 2, a first solenoid valve 3, and a second solenoid valve 4. The main valve 2 includes a main valve body 7 and a main valve core 8. The main valve body 2 is cylindrical, while the valve body 1 is rectangular. A three-stage stepped groove is provided on one bottom surface of the valve body 1. The main valve body 7 is embedded in the valve body 1 through the three-stage stepped groove, forming a sealed connection between the main valve body 7 and the valve body 1. The first solenoid valve 3 and the second solenoid valve 4 are arranged at the end of the valve body 1 away from the main valve 2, and are connected in parallel. Simultaneously, the first solenoid valve 3 and the outer surface of the valve body 1, and the second solenoid valve 4 and the outer surface of the valve body 1, form a seal to prevent oil leakage. An oil passage is also provided inside the valve body 1, including a main oil passage 13 and two branch oil passages. The main oil passage 13 connects to the main oil outlet 10 of the main valve body 7. The two branch oil passages connect to the first solenoid valve 3 and the second solenoid valve 4, respectively. Specifically, the two branch oil passages are the first branch 14 and the second branch 15. The first branch 14 branches off from the main oil passage 13 and connects to the first oil inlet 5 at the bottom of the first solenoid valve 3. The second branch 15 branches off from the main oil passage 13 and connects to the second oil inlet 6 on the side of the second solenoid valve 4. When there is a large pressure in the vehicle suspension system, the oil pressure outside the main valve body 7 of the damping valve will increase, which can open the main valve core 8 inside the main valve body 7. When the pressure in the suspension system is small, the oil pressure outside the main valve body 7 of the damping valve is also small, so the main valve core 8 is closed.

[0026] Specifically, the main valve body 7 is internally provided with a cylindrical main valve cavity 28, and the two ends of the main valve body 7 are respectively provided with a main oil inlet hole 9 and a main oil outlet hole 10, wherein the main oil inlet hole 9 is in sealing fit with the three-stage stepped groove of the valve body 1 at one end. A main valve core 8 is slidably connected in the main valve cavity 28, and eight groups of main oil return holes 12 are uniformly arranged on the circumferential side wall of the main valve body 7, which are arranged near the main oil inlet hole 9. A small through hole 29 is arranged at the end of the main valve body 7 near the main oil outlet hole 10, and all the oil at the main oil outlet hole 10 flows out through the through hole 29. An oil port seat 30 is arranged at the end of the main valve body 7 near the main oil inlet hole 9, and the oil port seat 30 is in the form of a whole ring. The outer diameter of the oil port seat 30 is in close fit with the end of the main valve body 7, thereby forming a fixed sealing connection. The end of the oil port seat 30 is flush with the end of the main oil inlet hole 9 of the main valve body 7, and the opposite end of the oil port seat 30 is in the form of an annular protrusion 31, which faces the side of the main valve cavity 28 of the main valve body 7. The main valve core 8 slides between the oil port seat 30 and the inside of the main valve cavity 28. A first spring 32 is arranged between the main valve core 8 and the side of the main valve cavity 28 near the main oil outlet hole 10. Specifically, the main valve core 8 includes a solid part and a hollow part. The solid part faces the side of the annular protrusion 31 of the oil port seat 30, and the hollow part faces the inside of the main valve cavity 28. An installation groove is arranged on the hollow part of the main valve core 8, and another installation groove is arranged on the main valve body 7 (near the side of the main oil outlet hole 10). The two ends of the first spring 32 are respectively installed in the two installation grooves, thereby ensuring the stability of the first spring 32 and enabling the first spring 32 to have a good elastic effect. The solid part of the main valve core 8 is tightly pressed against the annular protrusion 31 of the oil port seat 30 under the action of the first spring 32, and the solid part and the annular protrusion 31 can form a sealing fit. It should be noted that a damping hole 11 is also arranged at the central position of the solid part of the main valve core 8, which is used to pass oil into the main valve cavity 28 and has a damping effect.

[0027] When the pressure at the main oil inlet hole 9 is small, the oil cannot push away the main valve core 8 under the action of the first spring 32, and the oil can only enter the main valve cavity 28 through the damping hole 11 and then flow out to the main oil outlet hole 10 through the through hole 29 in the main valve cavity 28. When the pressure at the main oil inlet hole 9 is large, the oil can open the main valve core 8 by overcoming the elastic force of the first spring 32, most of the oil can flow back to the oil tank of the suspension system from the main oil return holes 12 on the side of the main valve body 7, thereby achieving rapid pressure reduction at the main oil inlet hole 9, and part of the oil flows into the main valve cavity 28 through the damping hole 11 and then flows out to the main oil outlet hole 10 through the through hole 29 in the main valve cavity 28, thereby achieving the damping effect of the damping adjusting valve.

[0028] The solid part of the main valve core 8 is located at the position corresponding to the main oil return hole 12, and the radial dimension of the solid part is slightly smaller than the overall outer diameter dimension of the main valve core 8, so that there is a large oil discharge space between the solid part and the main oil return hole 12, and when the main valve core 8 is opened by a large oil pressure, the oil can be quickly discharged and the pressure can be quickly reduced. In the three-stage stepped groove of the valve body 1, the main valve body 7 is embedded in the second-stage stepped groove, so that the main oil outlet 10 of the main valve body 7 and the innermost stepped groove can form a transition chamber 33, and the transition chamber 33 communicates the oil main passage 13 inside the valve body 1. The oil in the main valve chamber 28 is guided into the transition chamber 33 through the through hole 29 and the main oil outlet hole 10, and then guided into the positions of the first electromagnetic valve 3 and the second electromagnetic valve 4 through the oil main passage 13. The radial dimension of the innermost stepped groove is greater than the radial dimension of the main oil outlet hole 10, and also greater than the radial dimension of the oil main passage 13, so that the oil entering the transition chamber 33 has a pressure drop and a flow rate reduction effect, which can avoid a large pressure of the oil in the valve body 1, and has a certain protection effect on the valve body 1.

[0029] The oil main passage 13 is a straight oil passage, so that during processing, the side of the valve body 1 where the main valve 2 is installed is punched towards the side where the electromagnetic valve is installed, and the first branch passage 14 and the second branch passage 15 can be punched from the two sides of the valve body 1 towards the oil main passage 13 and communicated with the oil main passage 13, so that the first branch passage 14 and the second branch passage 15 are perpendicular to the oil main passage 13. Therefore, the internal structure design of the valve body 1 is relatively simple, the processing difficulty is smaller, and the reasonable oil passage arrangement also makes the overall size of the damper valve as small as possible, thereby reducing the production cost. It should be noted that when the first electromagnetic valve 3 and the second electromagnetic valve 4 are installed on the valve body 1, the first branch passage 14 is located at the end of the first electromagnetic valve 3 (arranged on one side inside the valve body 1), and the second branch passage 15 is located at the side of the second electromagnetic valve 4 (located on one side inside the valve body 1). The first branch passage 14 and the second branch passage 15 are staggered and located at different height positions of the valve body 1.

[0030] The first electromagnetic valve 3 comprises a first valve body 17, one end of the first valve body 17 is a first valve seat 16 embedded in the valve body 1, the other end of the first valve body 17 is sleeved with a first valve sleeve 34 located outside the valve body 1; the first valve seat 16 comprises a first fixed part 35 which is an annular rib structure, the first fixed part 35 can be embedded in the surface groove of the valve body 1 and form a sealed connection with the valve body 1, and the main part of the first valve seat 16 forms a first valve cavity 23 with the inside of the valve body 1, the inside of the first valve seat 16 is a cylindrical hollow body, a first valve core 36 is arranged in the first valve seat 16, the first valve core 36 is provided with a first through hole 18 arranged along the axial direction of the first valve body 17, and the first through hole 18 communicates the first branch 14 and the hollow part inside the first valve seat 16; four groups of first oil return holes 20 are further arranged on the circumferential side wall of the first valve seat 16, the first oil return holes 20 are uniformly arranged along the circumference of the first valve seat 16, and the first oil return holes 20 communicate the hollow part inside the first valve seat 16 and the first valve cavity 23. At the position corresponding to the first valve cavity 23, a process hole 37 is further arranged on one side of the valve body 1, the process hole 37 communicates the first valve cavity 23 and is used for discharging oil in the first valve cavity 23. In order to make the oil in the first valve cavity 23 be discharged together with the oil at the main oil return hole 12 to the oil tank of the suspension system, the outlet of the oil return path of the first valve cavity 23 should be close to the position of the main oil return hole 12, therefore, a first oil return path 19 is arranged on the valve body 1 close to the main valve body 7, the first oil return path 19 communicates the process hole 37, so that when the oil in the first valve cavity 23 is discharged, it enters the process hole 37 and then enters the first oil return path 19 and is discharged to the position of the outlet of the main oil return hole 12, which is more conducive to the oil in the first valve cavity 23 flowing back to the oil in the suspension system.

[0031] It should be further explained that in order to ensure that all the oil in the first valve cavity 23 enters the first oil return path 19, the outside of the process hole 37 is blocked by a steel ball 38 to play a sealing role and prevent oil loss.

[0032] The first valve stem 39 is arranged in the first valve body 17, corresponding to the position of the first through hole 18, and in the normal state, the first valve stem 39 is kept a distance from the first through hole 18, so that the first through hole 18 is in the normally open state, and a normally open hole 27 is further arranged on the first valve core 36, which is arranged in parallel with the first through hole 18, and the normally open hole 27 also communicates the first branch 14 and the first oil return hole 20. When the oil enters the first electromagnetic valve 3, the oil will enter the first oil return hole 20 from the normally open hole 27 and then enter the first valve chamber 23, and the first through hole 18 is a size-controllable hole. By controlling the first valve stem 39 with the electromagnet, the distance between the first valve stem 39 and the first through hole 18 can be changed to change the flow area. When the first through hole 18 is in the closed state, the oil only flows out from the normally open hole 27, and when the first through hole 18 is in the open state, the oil can flow out from the normally open hole 27 and the first through hole 18.

[0033] The second electromagnetic valve 4 includes a second valve body 22, one end of the second valve body 22 is a second valve seat 21, the second valve seat 21 is embedded in the valve body 1, the other end of the second valve body 22 is sleeved with a second valve sleeve 40, the second valve sleeve 40 is located outside the second valve body 22, the second valve sleeve 40 is arranged with a second valve stem 41 and an electromagnet, a second fixed part 42 is arranged on the second valve body 22, the second fixed part 42 is also a ring-shaped rib structure, the second fixed part 42 can be embedded in the surface groove of the valve body 1 and form a sealed connection with the valve body 1. The second valve seat 21 and the inside of the valve body 1 form a second valve chamber 24, which is directly communicated with the second branch 15; the inside of the second valve seat 21 is a cylindrical hollow structure, a second valve core 43 is arranged in the second valve seat 21, a second through hole 25 is arranged on the second valve core, and the second valve stem 41 corresponds to the position of the second through hole 25. The distance between the second valve stem 41 and the second through hole 25 can be controlled by the electromagnet to control the opening and closing of the second through hole 25. In the normal state, the second through hole 25 is a normally closed hole, and a second oil inlet 6 is arranged on the circumference of the second valve seat 21, four groups of second oil inlets 6 are arranged on the circumferential side wall of the second valve seat 21, and the second oil inlet 6 is directly communicated with the second valve chamber 24 and the hollow part inside the second valve seat 21. When the second valve stem 41 does not block the second through hole 25, the second oil inlet 6 and the second through hole 25 are also in a continuous state.

[0034] When the second through hole 25 is opened, the oil can enter the second valve cavity 24 from the second branch 15, then enter the inside of the second valve seat 21 from the second oil inlet 6, and then enter the second through hole 25; then the oil entering the second through hole 25 is backflowed, and similarly, the second backflow path 26 is arranged on the valve body 1 close to the main valve body 7, and the second backflow path 26 directly communicates the second through hole 25 and the main backflow hole 12 on the main valve body 7, so that the oil flowing through the second electromagnetic valve 4 can be backflowed to the position of the main backflow hole 12, and finally backflowed to the oil tank of the suspension system. It should be noted that the first backflow path 19 and the second backflow path 26 are arranged in the outermost stepped groove of the three-step groove of the valve body 1, and are close to the position of the main backflow hole 12 on the main valve body 7. And steel balls 38 are used to block the oil paths such as the first branch 14 and the second branch 15, to realize the sealing effect of the oil, and prevent oil leakage.

[0035] In the case that the main valve 2 cooperates with the first electromagnetic valve 3 and the second electromagnetic valve 4, the working principle of the scheme is as follows.

[0036] a. When the first through hole 18 of the first electromagnetic valve 3 is closed and the second through hole 25 of the second electromagnetic valve 4 is closed; control the first valve rod 39 to block the first through hole 18, and control the second valve rod 41 to block the second through hole 25. The oil enters the main valve cavity 28 through the damping hole 11, and then enters the oil main path 13 through the through hole 29, and the oil can only pass through the first branch 14, and then enter the first backflow path 19 through the always-open hole 27 in the first electromagnetic valve 3. At this time, the flow area of the damping valve is the smallest, and the damping valve as a whole presents a "hard" damping characteristic.

[0037] b. When the first through hole 18 of the first electromagnetic valve 3 is opened and the second through hole 25 of the second electromagnetic valve 4 is closed; control the first valve rod 39 to open the first through hole 18, and control the second valve rod 41 to block the second through hole 25. The oil enters the main valve cavity 28 through the damping hole 11, and then enters the oil main path 13 through the through hole 29, and the oil can only pass through the first branch 14, and then enter the first backflow path 19 through the always-open hole 27 in the first electromagnetic valve 3 and the first through hole 18. At this time, the flow area of the damping valve is smaller, and the damping valve as a whole presents a relatively "hard" damping characteristic.

[0038] c. When the first electromagnetic valve 3 first through hole 18 is closed, the second electromagnetic valve 4 second through hole 25 is opened; control the first valve stem 39 to block the first through hole 18, control the second valve stem 41 to open the second through hole 25, the oil enters the main valve cavity 28 through the damping hole 11, then enters the oil main line 13 through the through hole 29, the oil can pass through the first branch 14 and the second branch 15, respectively through the first electromagnetic valve 3 always open hole 27, the second electromagnetic valve 4 second through hole 25 and respectively enters the first return line 19 and the second return line 26 to return. At this time, the damping valve has a larger flow area, and the damping valve as a whole presents a relatively "soft" damping characteristic.

[0039] d. When the first electromagnetic valve 3 first through hole 18 is closed, the second electromagnetic valve 4 second through hole 25 is opened; control the first valve stem 37 to open the first through hole 18, control the second valve stem 41 to open the second through hole 25, the oil enters the main valve cavity 28 through the damping hole 11, then enters the oil main line 13 through the through hole 29, the oil can pass through the first branch 14 and the second branch 15, respectively through the first electromagnetic valve 3 always open hole 27 and the first through hole 18, the second electromagnetic valve 4 second through hole 25 and respectively enters the first return line 19 and the second return line 26 to return. At this time, the damping valve has a larger flow area, and the damping valve as a whole presents a relatively "soft" damping characteristic.

[0040] The above four kinds of damping characteristics are adjusted from "hard" to "soft" in turn. Of course, by adjusting the flow area of the first through hole 18 and the second through hole 25 respectively, the flow characteristics of the damping valve can also be adjusted more carefully.

Claims

1. A damper regulating valve characterized by, The valve body is provided with a main valve, a first electromagnetic valve and a second electromagnetic valve, the first electromagnetic valve is connected with the second electromagnetic valve in parallel, the main valve is connected with the bottom first oil inlet of the first electromagnetic valve, and the main valve is connected with the side second oil inlet of the second electromagnetic valve.

2. A damper control valve according to claim 1, wherein The main valve comprises a main valve body and a main valve core arranged in the inner cavity of the main valve body, one end of the main valve body is provided with a main oil inlet hole, and the other end is provided with a main oil outlet hole, and a first spring is arranged between the main valve core and the main oil outlet hole of the main valve body.

3. A damper control valve according to claim 2, wherein The main valve core is adapted to abut against the main oil inlet hole, the main valve core is provided with a damping hole corresponding to the position of the main oil inlet hole, and the main valve body is provided with a plurality of main oil return holes in the circumferential direction.

4. A damper control valve according to claim 3, wherein The main valve is provided with an oil main path and an oil branch path branched from the oil main path, the oil main path is connected with the main oil outlet hole, and the oil branch path comprises a first branch path connected with the first electromagnetic valve and a second branch path connected with the second electromagnetic valve.

5. A damper control valve according to claim 4, wherein The first electromagnetic valve comprises a first valve seat, the first valve seat is provided with a first through hole, a first valve cavity is formed between the first valve seat and the valve body, and the first through hole is connected with the first branch path and the first valve cavity.

6. A damper control valve according to claim 5, wherein The first valve seat is provided with a plurality of first oil return holes in the circumferential direction, and the valve body is provided with a first oil return path connected with the first oil return holes and the main oil return hole.

7. The damper control valve according to claim 4, wherein The second electromagnetic valve comprises a second valve seat, a second valve cavity is formed between the second valve seat and the valve body, the second valve seat is provided with a second through hole, and the second valve cavity is connected with the second branch path and the second through hole.

8. A damper control valve according to claim 7, characterised in that The main valve body is further provided with a second oil return path connected with the second through hole and the main oil return hole.

9. The damper modulating valve of claim 6, wherein, The first valve seat is further provided with a constant through hole connected with the first branch path and the first valve cavity.

10. A damper control valve according to any one of claims 1 to 9, characterised in that, The first electromagnetic valve is a normally open electromagnetic valve, and the second electromagnetic valve is a normally closed electromagnetic valve.

Images