Electromagnetic valve capable of adjusting damping

Abstract

The invention discloses an electromagnetic valve capable of adjusting damping, and relates to the field of electromagnetic valves, the electromagnetic valve comprises a shell and a movable valve sleeve, one end of the shell is in threaded connection with a shock absorber piston rod sleeve, a coil assembly is arranged between the shell and the shock absorber piston rod sleeve, an end cover is fixedly assembled at the other end of the shell, and the movable valve sleeve is assembled in the shell in a clearance mode. A main valve element is assembled in the movable valve sleeve in a clearance mode, a flow stabilizing cavity is formed between the main valve element and the end cover, the end face of the movable valve sleeve can make contact with the end face of the end cover to form a sealing face, a main elastic piece is arranged between the movable valve sleeve and the main valve element, and a pilot elastic piece is arranged at the end, away from the end cover, of the movable valve sleeve. The push rod has the freedom degree of moving in the axial direction of the shell, the valve sleeve hole is formed in the end, close to the push rod, of the movable valve sleeve, when the push rod moves close to the movable valve sleeve, the gap between the push rod and the inner wall of the valve sleeve hole is linearly reduced, damping adjustment is achieved, meanwhile, operation power consumption is effectively reduced, and energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the field of solenoid valves, in particular to a solenoid valve with adjustable damping. Background Art

[0002] The automotive suspension system is a critical component for vehicle safety, and the key component in suspension damping control is the pilot solenoid valve. This pilot valve features high flow and pressure regulation. Most shock absorber solenoid valves on the market are either built-in or external. The structure of the present invention is primarily suitable for built-in pilot solenoid valves. The most popular built-in solenoid valves on the market are inversely proportional, meaning that the greater the current, the smaller the damping force. This results in high power consumption, which severely limits the product's use and adoption. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a solenoid valve with adjustable damping to solve the deficiencies of the prior art.

[0004] The object of the present invention is achieved through the following technical solutions: an adjustable damping solenoid valve, comprising a shell and a movable valve sleeve, one end of the shell being threadedly connected to a shock absorber piston rod sleeve, a coil assembly being provided between the shell and the shock absorber piston rod sleeve, the other end of the shell being fixedly assembled with an end cover, the movable valve sleeve gap being assembled in the shell, a main valve core being assembled in the gap in the movable valve sleeve, a steady flow chamber being formed between the main valve core and the end cover, the end face of the movable valve sleeve being able to contact the end face of the end cover to form a sealing surface, and a sealing surface between the movable valve sleeve and the main valve core. A main elastic member is provided, and a leading elastic member is provided at the end of the movable valve sleeve away from the end cover, a push rod is provided in the outer shell, and the push rod has the freedom to move axially along the outer shell, and a valve sleeve hole is provided at the end of the movable valve sleeve close to the push rod, and the valve sleeve hole is located on the moving path of the push rod. When the push rod moves close to the movable valve sleeve, the gap between the push rod and the inner wall of the valve sleeve hole is linearly reduced, and a plurality of large holes and small holes are provided on the side wall of the outer shell along its own circumferential direction, the large hole is located between the end cover and the movable valve sleeve, and the small hole is located within the length range of the movable valve sleeve.

[0005] Furthermore, a central circular hole is opened through the end cover, and a plurality of circular holes are evenly distributed around the central circular hole. A first annular groove is opened on the end surface of the end cover close to the main valve core, and a second annular groove is opened on the end surface of the main valve core close to the end cover. The steady flow chamber is formed between the first annular groove and the second annular groove.

[0006] Furthermore, the end surface of the end cover close to the movable valve sleeve is provided with a first inclined surface, and the end surface of the movable valve sleeve close to the end cover is provided with a second inclined surface, and the second inclined surface can contact the first inclined surface to form the sealing surface.

[0007] Furthermore, the movable valve sleeve is provided with a flow cavity along its own axial direction, the valve sleeve hole is formed in the flow cavity, the side wall of the movable valve sleeve is provided with a plurality of first circular holes connected to the flow cavity, and the side wall of the movable valve sleeve is provided with a plurality of second circular holes connected to the valve sleeve holes.

[0008] Furthermore, an iron core is assembled in the gap in the outer shell, a drive shaft is fixedly passed through the iron core, the drive shaft is hollow, a mating shaft is fixed to one end of the push rod close to the drive shaft, the mating shaft gap fits in the inner hole of the drive shaft, a slot is opened at one end of the drive shaft close to the push rod, and the slot is connected to the inner hole of the drive shaft.

[0009] Furthermore, the inner wall of the shell is formed with a first stop step and a second stop step along its own axial direction, the first stop step is located between the movable valve sleeve and the second stop step, a spring seat and a bearing seat are fixedly installed on the first stop step and the second stop step respectively, a front bearing and a rear bearing are fixedly installed in the spring seat and the bearing seat respectively, and the end of the leading elastic member away from the movable valve sleeve rests on the spring seat.

[0010] Furthermore, the coil assembly includes a magnetic seat, a coil, a sealing ring and an elastic limiter. The magnetic seat is assembled between the outer shell and the shock absorber piston rod sleeve, the coil is installed in the magnetic seat, and an annular groove is provided on the outer wall of the coil. The sealing ring is installed between the annular groove and the magnetic seat, and the elastic limiter is installed between the outer shell and the magnetic seat.

[0011] Furthermore, the elastic limiting member is any one of a corrugated spring, an elastic sealing ring and a spring.

[0012] Furthermore, the main elastic member adopts a single spring structure or a double spring structure, and the double spring structure includes a first spring and a second spring, and the second spring is sleeved in the first spring.

[0013] Furthermore, the leading elastic member adopts a single spring structure a or a double spring structure b, and the structure of the double spring structure b is the same as that of the double spring structure.

[0014] The beneficial effects of the present invention are: 1. By linearly adjusting the clearance between the push rod and the inner wall of the valve sleeve bore, as well as the clearance between the movable valve sleeve, main valve core, and end cap, the damping force of the shock absorber can be linearly controlled in both the compression and recovery directions. Compared to traditional solenoid valves, this system achieves damping adjustment while effectively reducing operating power consumption and energy consumption, laying the foundation for widespread product adoption and promotion, and helping to enhance its market competitiveness.

[0015] 2. The setting of the flow stabilization chamber helps to stabilize the flow of the damping medium and reduce the impact of fluid fluctuations on damping control. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a solenoid valve with adjustable damping according to the present invention; Figure 2 This is a structural schematic diagram of an end cover of a solenoid valve with adjustable damping according to the present invention; Figure 3 This is a schematic structural diagram of a movable valve sleeve in a solenoid valve with adjustable damping according to the present invention; Figure 4 This is a structural schematic diagram of a housing in a solenoid valve with adjustable damping according to the present invention; Figure 5 This is a schematic structural diagram of a drive shaft in a solenoid valve with adjustable damping according to the present invention; Figure 6 This is a schematic diagram of the structure of the main elastic member in a solenoid valve with adjustable damping according to the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the main elastic member in a solenoid valve with adjustable damping according to the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the structure of the main elastic member in a solenoid valve with adjustable damping according to the present invention. Figure 3 ; Figure 9 This is a schematic diagram of the structure of the main elastic member in a solenoid valve with adjustable damping according to the present invention. Figure 4 ; Figure 10 Schematic diagram of the cooperation between the push rod and the movable valve sleeve of the present invention Figure 1 ; Figure 11 Schematic diagram of the cooperation between the push rod and the movable valve sleeve of the present invention Figure 2 ; Figure 12 Schematic diagram of the cooperation between the push rod and the movable valve sleeve of the present invention Figure 3 ; Figure 13 This is a schematic diagram of the structure of the coil assembly in a solenoid valve with adjustable damping according to the present invention. Figure 1 ; Figure 14 This is a schematic diagram of the structure of the coil assembly in a solenoid valve with adjustable damping according to the present invention. Figure 2 ; Figure 15 This is a schematic diagram of the structure of the coil assembly in a solenoid valve with adjustable damping according to the present invention. Figure 3 ; Figure 16 This is a schematic structural diagram of a flow stabilization chamber in a solenoid valve with adjustable damping according to the present invention; Figure 17 This is a flow channel diagram showing the compression direction of a solenoid valve with adjustable damping according to the present invention; Figure 18 A flow channel diagram showing the restoration direction of a solenoid valve with adjustable damping according to the present invention; In the figure, 1-end cover, 2-end cover gasket, 3-housing, 4-main valve core, 5-main elastic member, 6-movable valve sleeve, 7-housing sealing ring, 8-pilot elastic member, 9-push rod, 10-front bearing, 11-spring seat, 12-iron core, 13-drive shaft, 14-magnetic seat, 15-coil, 16-rear bearing, 17-bearing seat, 18-elastic limiter, 19-shock absorber piston rod sleeve, 20-valve sleeve hole, 21-large hole, 22-small hole, 23-center circular hole, 24-circular hole, 25-first annular groove, 26-second annular groove, 27-first inclined surface, 28-second inclined surface, 29-circulation chamber, 30-first circular hole, 31-second circular hole, 32-first spring, 33-second spring, 34-notch, 35-sealing ring. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0018] Example 1 like Figures 1 to 18As shown, a solenoid valve with adjustable damping includes a shell 3 and a movable valve sleeve 6. One end of the shell 3 is threadedly connected to the shock absorber piston rod sleeve 19. A shell sealing ring 7 is provided between the outer wall of the shell 3 and the inner wall of the shock absorber piston rod sleeve 29. A coil assembly is provided between the shell 3 and the shock absorber piston rod sleeve 19. The other end of the shell 3 is fixedly equipped with an end cover 1. An end cover gasket 2 is provided between the shell 3 and the end cover 1. The movable valve sleeve 6 is gap-assembled in the shell 3. The main valve core 4 is installed in the gap in the movable valve sleeve 6. A steady flow chamber is formed between the main valve core 4 and the end cover 1. The end face of the movable valve sleeve 6 can contact the end face of the end cover 1 to form a sealing surface. A main elastic member 5 is provided between the movable valve sleeve 6 and the main valve core 4, a leading elastic member 8 is provided at the end of the movable valve sleeve 6 away from the end cover 1, a push rod 9 is provided in the shell 3, and the push rod 9 has the freedom to move axially along the shell 3, and a valve sleeve hole 20 is provided at the end of the movable valve sleeve 6 close to the push rod 9. The valve sleeve hole 20 is located on the moving path of the push rod 9. When the push rod 9 moves close to the movable valve sleeve 6, the gap between the push rod 9 and the inner wall of the valve sleeve hole 20 is linearly reduced. A plurality of large holes 21 and small holes 22 are provided on the side wall of the shell 3 along its own circumferential direction. The large hole 21 is located between the end cover 1 and the movable valve sleeve 6, and the small hole 22 is located within the length range of the movable valve sleeve 6. A central circular hole 23 is provided on the cover 1, and a plurality of circular holes 24 are evenly distributed around the central circular hole 23. An iron core 12 is installed in the gap of the shell 3, and a drive shaft 13 is fixedly passed through the iron core 12. The drive shaft 13 is hollow, and a matching shaft is fixed on the end of the push rod 9 close to the drive shaft 13. The matching shaft gap is matched with the inner hole of the drive shaft 13. A notch 34 is provided on the end of the drive shaft 13 close to the push rod 9. The notch 34 is connected to the inner hole of the drive shaft 13. Compression direction: the damping medium of the shock absorber enters the low-pressure chamber from the high-pressure chamber through the flow channel. In this process, when the solenoid valve is not energized, the damping medium enters through the central circular hole 23 and the circular hole 24 of the end cover 1. In, the liquid pressure is transmitted to the main valve core 4 and the movable valve sleeve 6, pushing the main valve core 4 and the movable valve sleeve 6 to move away from the end cover 1, the main valve core 4 compresses the main elastic member 5, the movable valve sleeve 6 compresses the advanced elastic member 8, and the push rod 9 forms a seal with the valve sleeve hole 20 of the movable valve sleeve 6 through the conical surface. The matching shaft clearance of the push rod 9 is placed in the inner hole of the drive shaft 13, so that the damping medium enters the gap between the matching shaft and the drive shaft 13 through the notch 34, and then enters the inner hole of the drive shaft 13 through this gap. Finally, the damping medium enters the chamber where the iron core 12 is located, and the iron core 12 is fixedly connected to the drive shaft 13. At this time, the solenoid valve flow channel opening is the largest and the shock absorber damping force is the smallest. When the coil assembly is energized, the electromagnetic force pushes the iron core 12 and the drive shaft 13 toward the push rod 9, and the drive shaft 13 pushes the push rod 9 toward the movable valve sleeve 6. A seal is formed between the push rod 9 and the valve sleeve hole 20 to drive the movable valve sleeve 6 to move toward the end cover 1. The movable valve sleeve 6 pushes the main valve core 4 toward the end cover 1 through the main elastic member 5. The gap between the three is linearly reduced, thereby achieving the purpose of linear control of the damping force.Restoration direction: The damping medium of the shock absorber enters the low-pressure chamber from the high-pressure chamber through the flow channel. During this process, when the solenoid valve is not energized, the damping medium enters through the large hole 21 and the small hole 22 of the shell 3. The liquid pressure flowing into the small hole 22 and the liquid pressure entering the large hole 21 are opposite forces, pushing the movable valve sleeve 6 toward the push rod 9, that is, away from the end cover 1. The gap between the movable valve sleeve 6 and the end cover 1 is the largest, the damping force value is the smallest, and the overall damping medium flow direction is opposite to the compression direction. When the coil assembly is energized, the electromagnetic force drives the drive shaft 13 to move close to the movable valve sleeve 6 through the iron core 12. The push rod 9 seals the valve sleeve hole 20 of the movable valve sleeve 6 and drives the movable valve sleeve 6 to move close to the end cover 1. The movable valve sleeve 6 and the main valve core 4 are acted upon by the liquid pressure, electromagnetic force and spring force, linearly reducing the gap between the movable valve sleeve 6 and the end cover 1, and the damping force of the shock absorber increases linearly. This enables the electromagnet to achieve linear control of the shock absorber's damping force in both the compression and recovery directions. Compared with traditional solenoid valves, this effectively reduces operating power consumption while achieving damping adjustment, thus laying the foundation for the widespread use and promotion of the product and helping to enhance its competitiveness in the market. Figures 10 to 12 As shown, the push rod 9 and the valve sleeve hole 20 are sealed by the conical surface and the inner diameter surface of the hole, or by the conical surface and the conical surface, or by the spherical surface and the conical surface.

[0019] Example 2 Based on the first embodiment, Figures 6 to 9 As shown, the main elastic member 5 adopts a single spring structure or a double spring structure, the double spring structure includes a first spring 32 and a second spring 33, the second spring 33 is arranged in the first spring 32, and the leading elastic member 8 adopts a single spring structure a or a double spring structure b, the structure of the double spring structure b is the same as the structure of the double spring structure, the structure of the main elastic member 5 and the leading elastic member 8 is not limited, and it is sufficient to have elasticity to play a reset role. A spring plus gasket structure, a single spring structure, or a double spring structure can be adopted. Secondly, the structures of the main elastic member 5 and the leading elastic member 8 do not need to be the same. The main elastic member 5 can adopt a single spring structure, and the leading elastic member 8 can adopt a double spring structure a, that is, the structure of the main elastic member 5 and the structure of the leading elastic member 8 are combined with each other within the range of structures that can be adopted.

[0020] Example 3 Based on the second embodiment, Figures 1 to 16As shown, the end surface of the end cap 1 near the main valve core 4 is provided with a first annular groove 25, and the end surface of the main valve core 4 near the end cap 1 is provided with a second annular groove 26. A steady flow chamber is formed between the first annular groove 25 and the second annular groove 26 to facilitate control. The end surface of the end cap 1 near the movable valve sleeve 6 is provided with a first inclined surface 27, and the end surface of the movable valve sleeve 6 near the end cap 1 is provided with a second inclined surface 28. The second inclined surface 28 can contact the first inclined surface 27 to form a sealing surface, which is the first seal. The sealing surface between the push rod 9 and the valve sleeve hole 20 is the second seal. The gradual formation of these two seals can linearly change the system pressure. In specific implementation, the housing 3 is processed in one piece. Unlike welded housings, the coaxiality of the parts is better and there is no risk of leakage or welding deformation. In specific implementation, the cross-sections of the first annular groove 25 and the second annular groove 26 can be arc-shaped, rectangular, conical, etc., that is, the shapes of the first annular groove 25 and the second annular groove 26 are not specifically limited, as long as they can form a steady flow chamber.

[0021] Example 4 Based on the third embodiment, Figures 1 to 3 As shown, the movable valve sleeve 6 is provided with a circulation cavity 29 along its own axial direction, the valve sleeve hole 20 is formed in the circulation cavity 29, the side wall of the movable valve sleeve 6 is provided with a plurality of first circular holes 30 connected to the circulation cavity 29, and the side wall of the movable valve sleeve 6 is provided with a plurality of second circular holes 31 connected to the valve sleeve hole 20. The damping medium flowing in through the large hole 21 and the small hole 22 enters the circulation cavity 29 through the first circular holes 30 and flows to the drive shaft 13 through the circulation cavity 29.

[0022] Example 5 Based on the fourth embodiment, Figure 1 As shown, the inner wall of the housing 3 is formed with a first stop step and a second stop step along its own axial direction. The first stop step is located between the movable valve sleeve 6 and the second stop step. The spring seat 11 and the bearing seat 17 are fixedly installed on the first stop step and the second stop step respectively. The front bearing 10 and the rear bearing 16 are fixedly installed in the spring seat 11 and the bearing seat 17 respectively. The end of the leading elastic member 8 away from the movable valve sleeve 6 is against the spring seat 11. The coil assembly includes a magnetic seat 14, a coil 15, and a sealing ring. 35 and the elastic limiter 18, the magnetic seat 14 is assembled between the housing 3 and the shock absorber piston rod sleeve 19, the coil 15 is installed in the magnetic seat 14, the outer wall of the coil 15 is provided with an annular groove, the sealing ring 35 is installed between the annular groove and the magnetic seat 14, the elastic limiter 18 is installed between the housing 3 and the magnetic seat 14, and the coil 15 can be energized to drive the drive shaft 13 to move through the iron core 12. After the coil 15 is de-energized, the drive shaft 13 is reset under the action of the main elastic member 5 and the leading elastic member 8.

[0023] Furthermore, if Figures 13 to 15As shown, the elastic limiter 18 is any one of a corrugated spring, an elastic sealing ring and a spring. After the magnetic base 14 is assembled in place, the elastic limiter 18 is compressed to prevent axial movement due to the gap between the magnetic base 14 and the housing 3 and the shock absorber piston rod sleeve 19.

Claims

1. A solenoid valve with adjustable damping, characterized in that: The invention comprises a housing (3) and a movable valve sleeve (6), one end of the housing (3) is threadedly connected to the shock absorber piston rod sleeve (19), a coil assembly is provided between the housing (3) and the shock absorber piston rod sleeve (19), the other end of the housing (3) is fixedly equipped with an end cover (1), the movable valve sleeve (6) is gap-assembled in the housing (3), a main valve core (4) is provided in the gap in the movable valve sleeve (6), a steady flow chamber is formed between the main valve core (4) and the end cover (1), the end face of the movable valve sleeve (6) and the end face of the end cover (1) can contact to form a sealing surface, a main elastic member (5) is provided between the movable valve sleeve (6) and the main valve core (4), and one side of the movable valve sleeve (6) away from the end cover (1) is provided with a main elastic member (5). A leading elastic member (8) is provided at the end thereof, a push rod (9) is provided in the shell (3), and the push rod (9) has the freedom to move axially along the shell (3), and a valve sleeve hole (20) is provided at one end of the movable valve sleeve (6) close to the push rod (9), and the valve sleeve hole (20) is located on the moving path of the push rod (9). When the push rod (9) moves close to the movable valve sleeve (6), the gap between the push rod (9) and the inner wall of the valve sleeve hole (20) decreases linearly, and a plurality of large holes (21) and small holes (22) are provided on the side wall of the shell (3) along its own circumferential direction, the large hole (21) is located between the end cover (1) and the movable valve sleeve (6), and the small hole (22) is located within the length range of the movable valve sleeve (6).

2. The solenoid valve with adjustable damping according to claim 1, characterized in that: A central circular hole (23) is formed through the end cover (1), and a plurality of circular holes (24) are evenly distributed around the central circular hole (23). A first annular groove (25) is formed on the end surface of the end cover (1) close to the main valve core (4), and a second annular groove (26) is formed on the end surface of the main valve core (4) close to the end cover (1). The steady flow chamber is formed between the first annular groove (25) and the second annular groove (26).

3. The solenoid valve with adjustable damping according to claim 1, characterized in that: The end surface of the end cover (1) close to the movable valve sleeve (6) is provided with a first inclined surface (27), and the end surface of the movable valve sleeve (6) close to the end cover (1) is provided with a second inclined surface (28), and the second inclined surface (28) can contact the first inclined surface (27) to form the sealing surface.

4. The solenoid valve with adjustable damping according to claim 1, characterized in that: The movable valve sleeve (6) is provided with a flow cavity (29) extending through the movable valve sleeve along its axial direction, the valve sleeve hole (20) is formed in the flow cavity (29), a plurality of first circular holes (30) communicating with the flow cavity (29) are opened on the side wall of the movable valve sleeve (6), and a plurality of second circular holes (31) communicating with the valve sleeve hole (20) are opened on the side wall of the movable valve sleeve (6).

5. The solenoid valve with adjustable damping according to claim 1, characterized in that: An iron core (12) is installed in the inner gap of the housing (3), a driving shaft (13) is fixedly passed through the iron core (12), the driving shaft (13) is hollow, a matching shaft is fixed to one end of the push rod (9) close to the driving shaft (13), the matching shaft gap is matched with the inner hole of the driving shaft (13), a notch (34) is opened at one end of the drive shaft (13) close to the push rod (9), and the notch (34) is connected to the inner hole of the driving shaft (13).

6. The solenoid valve with adjustable damping according to claim 5, characterized in that: The inner wall of the housing (3) is formed with a first stop step and a second stop step along its own axial direction, the first stop step is located between the movable valve sleeve (6) and the second stop step, a spring seat (11) and a bearing seat (17) are fixedly installed on the first stop step and the second stop step respectively, a front bearing (10) and a rear bearing (16) are fixedly installed in the spring seat (11) and the bearing seat (17) respectively, and an end of the leading elastic member (8) away from the movable valve sleeve (6) abuts against the spring seat (11).

7. The solenoid valve with adjustable damping according to claim 1, characterized in that: The coil assembly includes a magnetic base (14), a coil (15), a sealing ring (35) and an elastic limiting member (18), wherein the magnetic base (14) is assembled between the housing (3) and the shock absorber piston rod sleeve (19), the coil (15) is installed in the magnetic base (14), an annular groove is provided on the outer wall of the coil (15), the sealing ring (35) is installed between the annular groove and the magnetic base (14), and the elastic limiting member (18) is installed between the housing (3) and the magnetic base (14).

8. The solenoid valve with adjustable damping according to claim 7, characterized in that: The elastic limiting member (18) is any one of a corrugated spring, an elastic sealing ring and a spring.

9. The solenoid valve with adjustable damping according to claim 1, characterized in that: The main elastic member (5) adopts a single spring structure or a double spring structure, and the double spring structure includes a first spring (32) and a second spring (33), and the second spring (33) is sleeved inside the first spring (32).

10. The solenoid valve with adjustable damping according to claim 9, characterized in that: The leading elastic member (8) adopts a single spring structure a or a double spring structure b, and the structure of the double spring structure b is the same as that of the double spring structure.

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