An external solenoid valve for shock absorbers

Abstract

This utility model provides an external solenoid valve for shock absorbers, mainly composed of an electromagnetic actuator consisting of a main housing, a yoke, a moving iron core, a noise-reducing pad, a magnetic isolation pad, a stationary iron core, and an actuator shaft; an oil flow mechanism consisting of a main valve body, an overflow slider, a return spring, a first damping diaphragm, a valve plate, a second damping diaphragm, a main spring, a main slider, a compensation pad, and a lower cover plate; and a product failure safety mechanism consisting of a sealing block, a safety structure spring, and a process block. Compared with the solenoid valves currently on the market, this solenoid valve adds a product failure safety mechanism. Furthermore, the separate processing of the main housing significantly reduces the difficulty of product manufacturing. It also allows for performance control in case of power failure or product failure, effectively solving the customer's need for closed-loop control of the suspension system.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to an external electromagnetic valve for shock absorbers, which is applied to automotive suspension shock absorber systems to control the damping force of the shock absorbers. Background Technology

[0002] In automotive suspension damper systems, the adjustment and control of damper damping force is a key technology for improving vehicle handling and comfort. Solenoid valves are one of the core components for achieving this function. Solenoid valves quickly adjust damping force through electrical signals to achieve active or semi-active suspension control.

[0003] Currently, most solenoid valves in the industry adopt a pilot-operated relief valve structure, which controls the flow rate in the main valve channel by controlling the ease of oil flow through the relief port. However, this solenoid valve structure cannot guarantee consistent resistance performance after product failure, and its complex structure and high manufacturing difficulty result in low product yield.

[0004] Therefore, it is necessary to improve the existing solenoid valves to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides an external solenoid valve for shock absorbers. The solenoid valve has a product structure that is easy to process, and at the same time, it puts forward requirements for the consistency of performance after product failure.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an external solenoid valve for a shock absorber, comprising an electromagnetic actuator, an oil flow mechanism, and a product failure safety mechanism, wherein...

[0007] The electromagnetic actuator includes a main housing, a stationary iron core, an actuator shaft, a magnetic shielding pad, a yoke, and a moving iron core. The main housing has an upper cavity and a lower cavity. The moving iron core is axially disposed in the upper cavity and can move up and down within the upper cavity. The lower end of the moving iron core overlaps with the actuator shaft. The stationary iron core is coaxially sleeved on the outside of the actuator shaft, and its outer side is fixed to the side wall of the upper cavity. A magnetic shielding pad is provided on the actuator shaft between the moving iron core and the stationary iron core. The outer side of the main housing has a stepped surface. The yoke is sleeved on the outer side of the upper end of the main housing, and its lower end is connected to the stepped surface.

[0008] The upper end of the oil flow mechanism is connected to the lower cavity, including a main valve body, an overflow slider, a return spring, a lower cover plate, a valve plate, a main spring, and a main slider. The upper end of the main valve body is connected to the lower cavity, and an overflow cavity is provided axially inside the main valve body. An overflow slider is provided at the upper end of the overflow cavity, and a valve plate is provided in the overflow cavity below the overflow slider. The return spring is elastically supported between the overflow slider and the valve plate. The main slider is provided in the overflow cavity below the valve plate, and a conical cavity is provided inside the main slider. A lower cover plate is provided on the main valve body at the lower end of the main slider to seal the main slider in the overflow cavity. The main spring is elastically supported between the valve plate and the main slider. A product inlet is provided on the lower cover plate, which communicates with the conical cavity in the main slider to form an overflow channel. A through hole is provided on the valve plate to connect the overflow channel and the overflow cavity above the valve plate.

[0009] The upper side of the main valve body is provided with a safety chamber that communicates with the overflow chamber. The product failure safety mechanism is set in the safety chamber and includes a sealing block, a safety spring and a process plug. A safety hole is provided between the safety chamber and the overflow chamber to connect the two. The process plug and the sealing block are respectively set at the left and right ends of the safety chamber, and the safety spring is elastically supported between the process plug and the sealing block, so that the right side of the sealing block abuts against the safety hole.

[0010] Furthermore, the right end of the process block has a cylindrical part, and a safety spring is sleeved on the cylindrical part. The left end of the safety spring is fixed to the process block, and the right end abuts against the sealing block, so that the sealing block seals the safety hole.

[0011] Furthermore, the electromagnetic actuator also includes a noise reduction pad, which is disposed on the upper end of the moving iron core and located between the main housing and the moving iron core. On the one hand, after the product is powered off, the moving iron core moves upward rapidly under the force of the reset spring and impacts the upper surface; the addition of the noise reduction pad effectively reduces impact noise. On the other hand, it avoids direct contact between the moving iron core and the upper part of the main housing, effectively solving the problem of slow initial energization response of the solenoid valve.

[0012] Furthermore, it also includes a sealing ring; the outer wall of the main housing has an annular sealing groove, and the sealing ring is disposed within the sealing groove. The sealing ring is used for sealing the contact surfaces when the solenoid valve is connected to other components.

[0013] Furthermore, the oil flow mechanism also includes a first damping diaphragm and a second damping diaphragm. The first and second damping diaphragms are respectively disposed at the upper and lower ends of the valve plate, with the lower end of the return spring abutting against the upper surface of the first damping diaphragm and the upper end of the main spring abutting against the lower surface of the second damping diaphragm. The upper first damping diaphragm serves a sealing function, while the elastic deformation of the damping diaphragm effectively changes the internal flow path. The lower second damping diaphragm allows the main valve to open easily even under low pressure conditions.

[0014] Furthermore, the oil flow mechanism also includes a compensating shim, which is disposed on the contact surface between the main valve body and the lower cover plate. Since there are certain differences in the manufacturing consistency of the original spring length, the compensating shim can compensate for these differences.

[0015] Furthermore, the lower end of the main valve body has multiple flow holes along the circumferential direction on its side wall that communicate with the main flow channel.

[0016] Furthermore, the upper end of the overflow cavity has a multi-step structure, which facilitates the assembly of the overflow slider, valve plate, main slider, first damping diaphragm, and second damping diaphragm.

[0017] The beneficial effects of this utility model are as follows: The external solenoid valve for shock absorbers provided by this utility model adds a product failure safety mechanism compared with the solenoid valve structure currently on the market. At the same time, the main housing and yoke are processed separately, which can greatly reduce the difficulty of product processing and manufacturing. It can also control the performance when the power is cut off or the product fails, effectively solving the problem of customers achieving closed-loop control of the suspension system. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the external solenoid valve of the shock absorber of this utility model.

[0020] Figure 2 This is a top view of the external solenoid valve of the shock absorber of this utility model.

[0021] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0022] Figure 4 yes Figure 3 A magnified structural diagram of point A in the middle.

[0023] Figure 5 This is a schematic diagram of the main valve body.

[0024] Figure 6 This is a cross-sectional structural diagram of the main valve body.

[0025] Figure 7 This is a schematic diagram of the overflow slider.

[0026] Figure 8 This is a cross-sectional structural diagram of the overflow slider.

[0027] Figure 9 This is a schematic diagram of the oil flow path when the solenoid valve is energized.

[0028] Figure 10 This is a schematic diagram of the oil flow path when the solenoid valve is de-energized.

[0029] In the diagram: 1. Main housing, 2. Stationary iron core, 3. Actuator shaft, 4. Magnetic shielding pad, 5. Yoke body, 6. Moving iron core, 7. Noise reduction pad, 8. Sealing ring, 9. Overflow slider, 9.1. Annular platform, 9.2. Overflow hole, 9.3. Spring positioning groove, 10. Return spring, 11. Main valve body, 12. Lower cover plate, 13. First damping diaphragm, 14. Valve plate, 15. Second damping diaphragm, 16. Main spring, 17. Main slider, 18. Compensation shim, 19. Sealing block, 20. Safety spring, 21. Process blockage, 22. Safety chamber, 23. Safety hole, 24. Overflow chamber, 25. Overflow channel, 26. Flow hole, 27. Product inlet, 28. Clearance surface. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figures 1-6As shown, this utility model discloses an external solenoid valve for a shock absorber, comprising an electromagnetic actuator, an oil flow mechanism, and a product failure safety mechanism, wherein...

[0034] The electromagnetic actuator includes a main housing 1, a stationary iron core 2, an actuator shaft 3, a magnetic shielding pad 4, a yoke 5, and a moving iron core 6. The main housing 1 has an upper cavity and a lower cavity. The moving iron core 6 is axially positioned within the upper cavity and can move up and down within it. The lower end of the moving iron core 6 overlaps with the actuator shaft 3. The stationary iron core 2 is coaxially sleeved outside the actuator shaft 3, and its outer side is fixed to the side wall of the upper cavity. A magnetic shielding pad 4 is provided on the actuator shaft 3 between the moving iron core 6 and the stationary iron core 2. The outer side of the main housing 1 has a stepped surface. The yoke 5 is sleeved on the outer side of the upper end of the main housing 1, and its lower end connects to the stepped surface. The electromagnetic actuator also includes a noise reduction pad 7, which is located on the upper end of the moving iron core 6 and between the main housing 1 and the moving iron core 6. An annular sealing groove is provided on the outer wall of the main housing 1, and a sealing ring 8 is disposed within the sealing groove. The sealing ring 8 is used for sealing the contact surface when the electromagnetic valve is connected to other components.

[0035] The upper end of the oil flow mechanism is connected to the lower cavity, including a main valve body 11, an overflow slider 9, a return spring 10, a lower cover plate 12, a valve plate 14, a main spring 16, and a main slider 17. The upper end of the main valve body 11 is connected to the lower cavity, and an overflow cavity 24 is provided axially inside the main valve body 11. An overflow slider 9 is provided at the upper end of the overflow cavity 24. Figure 7 and Figure 8As shown, the overflow slider 9 is a T-shaped boss structure. Several overflow holes 9.2 are provided circumferentially along the upper annular platform 9.1. A spring positioning groove 9.3 for accommodating the upper end of the return spring 10 is provided on the lower end surface of the annular platform 9.1. A valve plate 14 is provided in the overflow cavity 24 below the overflow slider 9. The return spring 10 is elastically supported between the overflow slider 9 and the valve plate 14. A main slider 17 is provided in the overflow cavity 24 below the valve plate 14. The main slider 17 has a conical cavity, and a lower cover plate 12 is provided on the main valve body 11 at the lower end of the main slider 17, sealing the main slider 17 within the overflow cavity 24. Spring 16 is elastically supported between valve plate 14 and main slider 17; product inlet 27 is provided on the lower cover plate 12, which communicates with the conical cavity inside the main slider 17; through hole is provided on valve plate 14 to communicate with overflow channel and overflow cavity 24 above valve plate 14; the oil flow mechanism also includes a first damping diaphragm 13 and a second damping diaphragm 15, which are respectively disposed at the upper and lower ends of valve plate 14, and the lower end of return spring 10 abuts against the upper surface of the first damping diaphragm 13, and the upper end of main spring 16 abuts against the lower surface of the second damping diaphragm 15. In this embodiment, diaphragm auxiliary grooves are provided circumferentially on both the first damping diaphragm 13 and the second damping diaphragm 15. The oil flow mechanism also includes a compensation gasket 18, which is disposed on the contact surface between main valve body 11 and lower cover plate 12.

[0036] The upper side of the main valve body 11 is provided with a safety chamber 22 that communicates with the overflow chamber 24. The main valve body 11 outside the safety chamber 22 is cut flat to form a clearance surface 28, facilitating the outflow of overflowing hydraulic oil. The product failure safety mechanism is set in the safety chamber 22 and includes a sealing block 19, a safety spring 20, and a process plug 21. A safety hole 23 is provided between the safety chamber 22 and the overflow chamber 24 to connect the two. The process plug 21 and the sealing block 19 are respectively set at the left and right ends of the safety chamber 22, and the safety spring 20 is elastically supported between the process plug 21 and the sealing block 19, so that the right side of the sealing block 19 abuts against the safety hole 23. The right end of the process plug 21 has a cylindrical part, and the safety spring 20 is sleeved on the cylindrical part. The left end of the safety spring 20 is fixed to the process plug 21, and the right end abuts against the sealing block 19, so that the sealing block 19 seals the safety hole 23. Figure 5 and Figure 6 As shown, the lower side wall of the main valve body 11 is provided with multiple flow holes 26 communicating with the main flow channel along the circumferential direction. The upper end of the overflow chamber 24 has a multi-step structure, which facilitates the assembly of the overflow slider 9, valve plate 14, main slider 17, first damping diaphragm 13 and second damping diaphragm 15, etc.

[0037] Working principle:

[0038] like Figure 9 As shown in the diagram, the red arrow indicates the overflow channel 25, the blue arrow indicates the main channel, and the yellow arrow indicates the product inlet. When the solenoid valve is energized, the moving iron core 6 is electromagnetically excited and moves downward, causing the actuator shaft 3 and the overflow slider 9 to overcome the force of the return spring 10 and press down synchronously. This causes the hydraulic oil to flow along the overflow channel 25, from the conical cavity through the through hole on the valve plate 14 into the overflow chamber 24 below the overflow slider 9. The hydraulic oil in the overflow chamber 24 flows out through the overflow hole 9.2 on the overflow slider 9 and along the overflow channel 25 at the product failure safety mechanism. By generating different electromagnetic forces with different currents, the overflow channel 25 can be increased / decreased, thereby increasing / decreasing the opening degree of the main slider 17 and controlling the magnitude of the damping force of the shock absorber.

[0039] like Figure 10 As shown in the figure, the red arrow represents the overflow channel 25, the blue arrow represents the main channel, and the yellow arrow represents the product inlet. When the solenoid valve is de-energized or fails, the hydraulic oil overcomes the spring force of the safety spring 20 of the product failure safety mechanism, causing the oil circuit to flow, thereby determining the opening degree of the main slider 17. By setting different spring stiffnesses of the safety spring 20, the product performance when the product is de-energized or fails can be controlled, thereby ensuring the consistency of product performance when the product fails.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An external solenoid valve for shock absorbers, characterized in that: This includes electromagnetic actuators, oil flow mechanisms, and product failure safety mechanisms, among which... The electromagnetic actuator includes a main housing, a stationary iron core, an actuator shaft, a magnetic shielding pad, a yoke, and a moving iron core. The main housing has an upper cavity and a lower cavity. The moving iron core is axially disposed in the upper cavity and can move up and down within the upper cavity. The lower end of the moving iron core overlaps with the actuator shaft. The stationary iron core is coaxially sleeved on the outside of the actuator shaft, and its outer side is fixed to the side wall of the upper cavity. A magnetic shielding pad is provided on the actuator shaft between the moving iron core and the stationary iron core. The outer side of the main housing has a stepped surface. The yoke is sleeved on the outer side of the upper end of the main housing, and its lower end is connected to the stepped surface. The upper end of the oil flow mechanism is connected to the lower cavity, including a main valve body, an overflow slider, a return spring, a lower cover plate, a valve plate, a main spring, and a main slider. The upper end of the main valve body is connected to the lower cavity, and an overflow cavity is provided axially inside the main valve body. An overflow slider is provided at the upper end of the overflow cavity, and a valve plate is provided in the overflow cavity below the overflow slider. The return spring is elastically supported between the overflow slider and the valve plate. The main slider is provided in the overflow cavity below the valve plate, and a conical cavity is provided inside the main slider. A lower cover plate is provided on the main valve body at the lower end of the main slider to seal the main slider in the overflow cavity. The main spring is elastically supported between the valve plate and the main slider. A product inlet is provided on the lower cover plate, which communicates with the conical cavity in the main slider to form an overflow channel. A through hole is provided on the valve plate to connect the overflow channel and the overflow cavity above the valve plate. The upper side of the main valve body is provided with a safety chamber that communicates with the overflow chamber. The product failure safety mechanism is set in the safety chamber and includes a sealing block, a safety spring and a process plug. A safety hole is provided between the safety chamber and the overflow chamber to connect the two. The process plug and the sealing block are respectively set at the left and right ends of the safety chamber, and the safety spring is elastically supported between the process plug and the sealing block, so that the right side of the sealing block abuts against the safety hole.

2. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: The right end of the process block has a cylindrical part, and a safety spring is sleeved on the cylindrical part. The left end of the safety spring is fixed to the process block, and the right end abuts against the sealing block, so that the sealing block seals the safety hole.

3. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: The electromagnetic actuator also includes a noise reduction pad, which is disposed on the upper end of the moving iron core and located between the main housing and the moving iron core.

4. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: It also includes a sealing ring, and the outer wall of the main housing is provided with an annular sealing groove, and the sealing ring is disposed in the sealing groove.

5. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: The oil flow mechanism further includes a first damping diaphragm and a second damping diaphragm, which are respectively disposed at the upper and lower ends of the valve plate. The lower end of the return spring abuts against the upper surface of the first damping diaphragm, and the upper end of the main spring abuts against the lower surface of the second damping diaphragm.

6. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: The oil flow mechanism also includes a compensation gasket, which is disposed on the contact surface between the main valve body and the lower cover plate.

7. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: The lower end of the main valve body has multiple flow holes along the circumferential direction on the side wall that communicate with the main flow channel.

8. The external solenoid valve for shock absorbers as described in claim 1, characterized in that: The upper end of the overflow cavity has a multi-step structure.

Images