Solenoid valve with external shock absorber

Abstract

The invention provides an external electromagnetic valve of a shock absorber, which mainly comprises an electromagnetic actuating mechanism consisting of a main shell, a yoke body, a movable iron core, a noise reduction pad, a magnetic isolation pad, a static iron core and an actuating shaft, and an oil circulation mechanism consisting of a main valve body, an overflow slide block, a reset spring, a first damping diaphragm, a valve plate, a second damping diaphragm, a main spring, a main slide block, a compensation gasket and a lower cover plate, and the product failure safety mechanism consists of a sealing block, a safety structure spring and a process plug. Compared with an electromagnetic valve structure in the current market, the electromagnetic valve is additionally provided with a product failure safety mechanism, meanwhile, the main shell is machined in a split mode, the product machining and manufacturing difficulty can be greatly reduced, meanwhile, the performance can be managed and controlled when power is off or the product fails, and closed-loop control over a suspension system is effectively achieved for clients.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic valves, in particular to an external electromagnetic valve for a shock absorber, which is applied to a vehicle suspension shock absorber system and used for controlling the damping force of the shock absorber. BACKGROUND

[0002] In a vehicle suspension shock absorber system, the adjustment and control of the damping force of the shock absorber is a key technology for improving the handling and comfort of the vehicle, and the electromagnetic valve is one of the core components for realizing this function. The electromagnetic valve quickly adjusts the damping force through an electrical signal to realize active or semi-active suspension control.

[0003] At present, most of the electromagnetic valve structures in the industry adopt a pilot overflow valve structure, which controls the size of the main valve passage flow by controlling the difficulty of oil flow through the overflow port. The above-mentioned electromagnetic valve structure cannot guarantee the consistency of the resistance force performance after product failure, and the structure is complex and difficult to manufacture, resulting in a low product yield.

[0004] Therefore, it is necessary to improve the existing electromagnetic valve to solve the above problems. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the deficiencies in the prior art, and the present application provides an external electromagnetic valve for a shock absorber, which has a product structure that is easy to process, and at the same time requires consistency in performance after product failure.

[0006] The technical solution adopted by the present application to solve the technical problem is: an external electromagnetic valve for a shock absorber, comprising an electromagnetic actuator, an oil flow mechanism and a product failure safety mechanism, wherein, The electromagnetic actuator comprises a main housing, a static core, an actuator shaft, a magnetic separation pad, a yoke body and a moving core, the main housing is provided with an upper cavity and a lower cavity, the moving core is arranged in the upper cavity in the axial direction and can move up and down in the upper cavity, the lower end of the moving core is connected with the actuator shaft, the static core is coaxially arranged outside the actuator shaft, and the outer side is fixedly connected with the side wall of the upper cavity, the magnetic separation pad is arranged on the actuator shaft between the moving core and the static core; the outer side of the main housing is provided with a stepped surface, and the yoke body is arranged outside the upper end of the main housing and connected with the stepped surface at the lower end; The upper end of the oil liquid flow mechanism is connected in the lower cavity, comprising a main valve body, an overflow slider, a reset 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 in the lower cavity, and an overflow cavity is arranged in the main valve body in the axial direction, the upper end of the overflow cavity is provided with an overflow slider, the overflow cavity below the overflow slider is provided with a valve plate, the reset spring is elastically supported between the overflow slider and the valve plate, the overflow cavity below the valve plate is provided with a main slider, the main slider is provided with a conical cavity, and the lower end of the main slider is provided with a lower cover plate on the main valve body to seal the main slider in the overflow cavity, and the main spring is elastically supported between the valve plate and the main slider; the lower cover plate is provided with a product inlet, the product inlet is communicated with the conical cavity in the main slider to form an overflow flow channel; the valve plate is provided with a through hole to communicate the overflow channel and the overflow cavity above the valve plate; The upper end side of the main valve body is provided with a safety cavity communicated with the overflow cavity, and the product failure safety mechanism is arranged in the safety cavity, comprising a sealing block, a safety spring and a process plug, a safety hole communicated with the safety cavity and the overflow cavity is arranged between the safety cavity and the overflow cavity, the process plug and the sealing block are arranged at the left end and the right end of the safety cavity respectively, 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.

[0007] Further, the right end of the process plug has a cylindrical portion, the safety spring is sleeved on the cylindrical portion, the left end of the safety spring is fixed with the process plug, and the right end abuts against the sealing block, so that the sealing block is blocked at the safety hole.

[0008] Further, the electromagnetic actuating mechanism further comprises a noise reduction pad, which is arranged on the upper end of the moving iron core and between the main shell and the moving iron core. On the one hand, after the product is powered off, the moving iron core moves upward quickly under the force of the reset spring and hits the upper surface, and the newly added noise reduction pad effectively reduces the impact noise; on the other hand, the direct contact between the moving iron core and the upper part of the main shell is avoided, effectively solving the problem of slow initial power-on response of the electromagnetic valve.

[0009] Further, it further comprises a sealing ring, and the outer wall of the main shell is provided with an annular sealing groove, and the sealing ring is arranged in the sealing groove. The sealing ring is used for sealing the contact surface when the electromagnetic valve is connected with other components.

[0010] Further, the oil liquid flow mechanism further comprises a first damping diaphragm and a second damping diaphragm, the first damping diaphragm and the second damping diaphragm are arranged at the upper end and the lower end of the valve plate respectively, the lower end of the reset 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. The upper first damping diaphragm plays a sealing role, and the elastic deformation of the damping diaphragm effectively changes the internal flow path. The lower second damping diaphragm plays a role in that the main valve can be easily opened under the condition of small pressure of the electromagnetic valve.

[0011] Further, the oil flow mechanism further comprises a compensation gasket arranged on the contact surface between the main valve body and the lower cover plate. Since there is a certain difference in the original length consistency of the spring, the compensation gasket can compensate for the difference in the original length of the spring.

[0012] Further, a plurality of flow holes in communication with the main flow channel are arranged on the side wall of the lower end of the main valve body in the circumferential direction.

[0013] Further, the upper end of the overflow cavity is a multi-stage stepped structure. The assembly of the overflow slider, the valve plate, the main slider, the first damping diaphragm and the second damping diaphragm and the like structure is facilitated.

[0014] The shock absorber external electromagnetic valve provided by the application has the advantages that compared with the electromagnetic valve structure on the market, the product failure safety mechanism is increased, the main shell and the yoke body are processed in a split mode, the manufacturing difficulty of the product is greatly reduced, the performance when power failure or product failure is controlled, and the closed-loop control of the suspension system by the customer is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The application will be further described below in combination with the drawings and examples.

[0016] Figure 1 is a perspective structural schematic view of the shock absorber external electromagnetic valve of the application.

[0017] Figure 2 is a top view structural schematic view of the shock absorber external electromagnetic valve of the application.

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

[0019] Figure 4 is Figure 3 is an enlarged structural schematic view of A in the figure.

[0020] Figure 5 is a structural schematic view of the main valve body.

[0021] Figure 6 is a sectional structural schematic view of the main valve body.

[0022] Figure 7 is a structural schematic view of the overflow slider.

[0023] Figure 8 is a sectional structural schematic view of the overflow slider.

[0024] Figure 9 is an oil flow channel schematic view when the electromagnetic valve is powered on.

[0025] Figure 10is the oil flow channel schematic diagram when the electromagnetic valve is powered off.

[0026] In the figure: 1, main shell, 2, static core, 3, execution shaft, 4, magnetic isolation pad, 5, yoke body, 6, moving core, 7, noise reduction pad, 8, sealing ring, 9, overflow slider, 9.1, annular table, 9.2, overflow hole, 9.3, spring positioning groove, 10, reset 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 pad, 19, sealing block, 20, safety spring, 21, process plug, 22, safety cavity, 23, safety hole, 24, overflow cavity, 25, overflow flow channel, 26, flow-through hole, 27, product inlet, 28, avoidance surface. DETAILED DESCRIPTION

[0027] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0030] As Figures 1-6 shown, an external electromagnetic valve of a shock absorber of the present application comprises an electromagnetic actuator, an oil flow mechanism and a product failure safety mechanism, wherein, The electromagnetic actuator comprises a main housing 1, a static core 2, an actuating shaft 3, a magnetic isolation pad 4, a yoke body 5 and a dynamic core 6, the main housing 1 is internally provided with an upper cavity and a lower cavity, the dynamic core 6 is arranged in the upper cavity in an axial direction and can move up and down in the upper cavity, the lower end of the dynamic core 6 is overlapped with the actuating shaft 3, the static core 2 is coaxially sleeved on the outside of the actuating shaft 3 and is fixedly connected with the side wall of the upper cavity, the magnetic isolation pad 4 is arranged on the actuating shaft 3 between the dynamic core 6 and the static core 2, a stepped surface is arranged on the outside of the main housing 1, the yoke body 5 is sleeved on the outside of the upper end of the main housing 1 and is connected with the stepped surface at the lower end, the electromagnetic actuator further comprises a noise reduction pad 7, the noise reduction pad 7 is arranged on the upper end of the dynamic core 6 and is located between the main housing 1 and the dynamic core 6, and a sealing groove is arranged on the outer wall of the main housing 1, and a sealing ring 8 is arranged in the sealing groove. The sealing ring 8 is used for sealing the contact surface when the electromagnetic valve is connected with other components.

[0031] The upper end of the oil flow mechanism is connected in the lower cavity, comprising a main valve body 11, an overflow sliding block 9, a reset spring 10, a lower cover plate 12, a valve plate 14, a main spring 16 and a main sliding block 17, the upper end of the main valve body 11 is connected in the lower cavity, and the inside of the main valve body 11 is provided with an overflow cavity 24 in an axial direction, the inside of the overflow cavity 24 is provided with the overflow sliding block 9 at the upper end, as shown in Figure 7 and Figure 8 The overflow sliding block 9 is a T-shaped boss structure as a whole, a plurality of overflow holes 9.2 are arranged on the annular table 9.1 in a circumferential direction, a spring positioning groove 9.3 for accommodating the upper end of the reset spring 10 is arranged on the lower end surface of the annular table 9.1, the overflow cavity 24 below the overflow sliding block 9 is provided with the valve plate 14, the reset spring 10 is elastically supported between the overflow sliding block 9 and the valve plate 14, the overflow cavity 24 below the valve plate 14 is provided with the main sliding block 17, the main sliding block 17 is provided with a tapered cavity, the main valve body 11 at the lower end of the main sliding block 17 is provided with the lower cover plate 12, the main sliding block 17 is sealed in the overflow cavity 24, and the main spring 16 is elastically supported between the valve plate 14 and the main sliding block 17; the lower cover plate 12 is provided with a product inlet 27, the product inlet 27 is communicated with the tapered cavity in the main sliding block 17; the valve plate 14 is provided with a through hole to communicate the overflow passage and the overflow cavity 24 above the valve plate 14; the oil flow mechanism further comprises a first damping diaphragm 13 and a second damping diaphragm 15, the first damping diaphragm 13 and the second damping diaphragm 15 are arranged at the upper and lower ends of the valve plate 14 respectively, and the lower end of the reset spring 10 abuts against the upper surface of the first damping diaphragm 13, and the upper end of the main spring 16 abuts against the lower surface of the second damping diaphragm 15. In the embodiment, diaphragm auxiliary grooves are arranged on the first damping diaphragm 13 and the second damping diaphragm 15 in a circumferential direction. The oil flow mechanism further comprises a compensation pad 18, the compensation pad 18 is arranged on the contact surface between the main valve body 11 and the lower cover plate 12.

[0032] The upper side surface of the main valve body 11 is provided with a safety cavity 22 connected to the overflow cavity 24. The main valve body 11 outside the safety cavity 22 is cut flat to form an avoidance surface 28 to facilitate the outflow of overflowed hydraulic oil. The product failure safety mechanism is arranged in the safety cavity 22, including a sealing block 19, a safety spring 20 and a process plug 21. A safety hole 23 connecting the safety cavity 22 and the overflow cavity 24 is provided. The process plug 21 and the sealing block 19 are respectively arranged at the left and right ends of the safety cavity 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 portion, and the safety spring 20 is sleeved on the cylindrical portion. 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 is sealed at the safety hole 23. As Figure 5 and Figure 6 As shown, the sidewall at the lower end of the main valve body 11 is circumferentially provided with a plurality of flow holes 26 that communicate with the main flow channel. The upper end of the overflow chamber 24 has a multi-step structure, facilitating the assembly of the overflow slider 9, valve plate 14, main slider 17, first damping diaphragm 13, and second damping diaphragm 15.

[0033] Working principle: like Figure 9 As shown, the red arrow indicates 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 simultaneously press downward against the force of the return spring 10. This causes the hydraulic oil to flow along the overflow channel 25, from the conical cavity through the through-hole in the valve plate 14, into the overflow chamber 24 below the overflow slider 9. The hydraulic oil in the overflow chamber 24 then flows through the overflow hole 9.2 in the overflow slider 9 and out 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 or decreased, thereby increasing or decreasing the opening of the main slider 17, thereby controlling the damping force of the shock absorber.

[0034] like Figure 10 As shown in the figure, 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 powered off 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 powered off or fails can be controlled, thereby ensuring that the performance consistency of the product is managed and controlled when it fails safely.

[0035] The above is the ideal embodiment of the present application, and the above description can be changed and modified without departing from the scope of the present application. The technical scope of the present application is not limited to the above description, and should be determined by the scope of the claims.

Claims

1. A shock absorber external solenoid valve, characterized by: It includes electromagnetic actuator, oil circulation mechanism and product failure safety mechanism, among which, The electromagnetic actuator includes a main shell, a static iron core, an actuator shaft, a magnetic isolation pad, a yoke body and a moving iron core. The main shell is provided with an upper cavity and a lower cavity. The moving iron core is axially arranged in the upper cavity and can move up and down in the upper cavity. The lower end of the moving iron core overlaps with the actuator shaft. The static iron core is coaxially sleeved on the outside of the actuator shaft, and the outer side is fixedly connected to the side wall of the upper cavity. A magnetic isolation pad is provided on the actuator shaft between the moving iron core and the static iron core; the outer side of the main shell is provided with a step surface, the yoke body is sleeved on the outer side of the upper end of the main shell and the lower end is connected to the step surface; The upper end of the oil circulation mechanism is connected to the lower chamber, and includes 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 chamber, and an overflow chamber is axially provided inside the main valve body, an overflow slider is provided inside the overflow chamber at the upper end, a valve plate is provided in the overflow chamber below the overflow slider, the return spring is elastically supported between the overflow slider and the valve plate, a main slider is provided in the overflow chamber below the valve plate, a conical cavity is provided in the main slider, and a lower cover plate is provided on the main valve body at the lower end of the main slider, sealing the main slider in the overflow chamber, and the main spring is elastically supported between the valve plate and the main slider; a product inlet is provided on the lower cover plate, and the product inlet is communicated with the conical cavity in the main slider to form an overflow flow channel; a through hole is provided on the valve plate to communicate with the overflow channel and the overflow chamber above the valve plate; A safety cavity connected to the overflow cavity is provided on the upper side of the main valve body. The product failure safety mechanism is arranged in the safety cavity, including a sealing block, a safety spring and a process plug. A safety hole connecting the safety cavity and the overflow cavity is provided between the two. The process plug and the sealing block are respectively arranged at the left and right ends of the safety cavity, and the safety spring is elastically supported between the process plug and the sealing block, so that the right side of the sealing block rests on the safety hole.

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

3. The external shock absorber solenoid valve according to claim 1, characterized in that: The electromagnetic actuator further includes a noise reduction pad, which is arranged at the upper end of the moving iron core and located between the main housing and the moving iron core.

4. The shock absorber external solenoid valve according to claim 1, characterized in that: It also includes a sealing ring. An annular sealing groove is provided on the outer wall of the main shell, and the sealing ring is arranged in the sealing groove.

5. The shock absorber external solenoid valve according to claim 1, characterized in that: The oil circulation mechanism also includes a first damping diaphragm and a second damping diaphragm, which are respectively arranged at the upper and lower ends of the valve plate, and 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 shock absorber external solenoid valve according to claim 1, characterized in that: The oil circulation mechanism further includes a compensation gasket, which is arranged on the contact surface between the main valve body and the lower cover plate.

7. The shock absorber external solenoid valve according to claim 1, characterized in that: A plurality of flow holes communicating with the main flow channel are circumferentially provided on the side wall of the lower end of the main valve body.

8. The shock absorber external solenoid valve according to claim 1, characterized in that: The upper end of the overflow chamber is a multi-step structure.

Images