A pilot fluid pressure regulating device and method for a shock absorber solenoid valve

Abstract

The present invention discloses a pilot fluid pressure regulating device and method for a shock absorber solenoid valve, which relates to the technical field of solenoid valves, and comprises an electromagnetic mechanism and a valve body, wherein the valve body is fixedly mounted on the output end of the electromagnetic mechanism; the electromagnetic mechanism comprises a magnetic shell, wherein a magnetic sleeve is fixedly sleeved inside the magnetic shell, an armature is slidably sleeved inside the magnetic sleeve, a magnetic gasket is fixedly sleeved at the bottom of the magnetic sleeve, and a push rod is slidably sleeved inside the magnetic gasket. In the present invention, through the design of the push rod and the magnetic gasket, when the push rod loses electromagnetic force control, an end face seal is formed between the annular ring on the push rod and the magnetic gasket, forcing the pressure to flow out from a first drain hole on the magnetic gasket, and providing protective damping through the fixed first drain hole, which can achieve stable protective damping and provide an adjustment device with different protective damping according to needs.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and in particular to a pilot fluid pressure regulating device and method for a shock absorber solenoid valve. Background Art

[0002] As an important component of active and semi-active suspension systems, the performance of variable damping shock absorbers directly affects the vehicle's handling stability and ride comfort. At present, variable damping shock absorbers are generally divided into stepper motor controlled orifice type, magnetorheological type, electrorheological type and solenoid valve type. Among them, the stepper motor controlled orifice type shock absorber has a slow response and cannot meet the requirements of real-time adjustment of damping force during the suspension movement process; magnetorheological shock absorbers and electrorheological shock absorbers are still in the theoretical research stage, with complex structures and unstable product performance; solenoid valve shock absorbers have the characteristics of simple structure, rapid response and stable performance, becoming the preferred mass production solution for active and semi-active suspension.

[0003] In the field of solenoid valve hydraulic control, in order to achieve greater overflow control under a certain electromagnetic force, a pilot device is often used to amplify the main stage control pressure or current; the pilot damping is controlled by an electrical signal to adjust the damping of the main stage and the entire solenoid valve. Through such a device, the soft and hard adjustment of the shock absorber damping can be achieved; to ensure the controllability of the damping, such solenoid valves need to meet the linear and precise control of current and damping; to ensure the smooth operation of the vehicle, the opening characteristics under lower pressure / flow need to be met; at the same time, in order to ensure the sudden application of the vehicle, it is usually required that the valve can also provide a certain controllable damping in the event of an accidental power outage. This mode is called fail-safe mode, or "Fail safe".

[0004] Patent CN117189816A discloses a relief valve and a shock absorber of a shock absorber, wherein a pilot device includes a pilot valve core of a leading part, and movement of the pilot valve core is ensured by ensuring a clearance between the pilot valve core and a valve sleeve. Therefore, the radial outer ring of the pilot valve core has high precision requirements, so it is expensive and prone to failure such as jamming during movement.

[0005] Patent CN115217882A discloses a damping control solenoid valve, which includes: a main stage valve, a pilot stage valve, a safety valve, an electromagnetic head and a push rod; the safety valve includes a safety valve core, a safety valve spring and a safety valve spring seat; Fig.19 As shown, most solenoid valves on the market provide a certain throttling effect through the flow through the gap between the pilot valve core and the valve sleeve. This gap will cause poor consistency in the protection damping due to the eccentricity of the pilot gap, and in order to ensure the relative movement of the valve core and the valve sleeve, the relative gap between the valve core and the valve sleeve cannot be changed as required, resulting in the inability to adjust the damping in the protection mode as required.

[0006] To this end, we propose a pilot fluid pressure regulating device and method for a shock absorber solenoid valve. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a pilot fluid pressure regulating device and method for a shock absorber solenoid valve.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A pilot fluid pressure regulating device for a shock absorber solenoid valve comprises an electromagnetic mechanism and a valve body, wherein the valve body is fixedly mounted on an output end of the electromagnetic mechanism;

[0010] The electromagnetic mechanism comprises a magnetic shell, a magnetic sleeve is fixedly sleeved inside the magnetic shell, an armature is slidably sleeved inside the magnetic sleeve, a magnetic washer is fixedly sleeved at the bottom of the magnetic shell, a push rod is slidably sleeved inside the magnetic washer, a reset spring is sleeved on the outer wall of the push rod, and the reset spring is located between the armature and the magnetic washer;

[0011] The valve body includes a valve sleeve, which is fixedly sleeved on the bottom of the magnetic shell, the magnetic gasket and the valve sleeve are sleeved with each other, a pressure relief gasket is arranged inside the valve sleeve, a feedback sleeve is sleeved in the middle of the pressure relief gasket, a leaf spring is placed on the upper surface of the pressure relief gasket, the magnetic gasket is in contact with the upper surface of the leaf spring, and the push rod is located directly above the leaf spring.

[0012] Preferably, a through hole is formed on the outer wall of the armature, the top end of the push rod extends into the through hole, an oil drain hole is formed on the outer wall of the armature, and there is at least one oil drain hole. An electromagnetic coil is sleeved on the inner wall of the magnetic shell, and the electromagnetic coil is located between the magnetic shell and the magnetic sleeve.

[0013] Preferably, a second through hole is provided at the axis of the push rod, an annular ring is fixedly sleeved on the bottom outer wall of the push rod, the annular ring is integrally formed with the push rod, and an annular groove is provided on the bottom outer wall of the push rod, and the annular groove is located directly above the push rod;

[0014] A first drain hole is provided inside the magnetic gasket, a drain port is provided on the outer wall of the magnetic gasket, the first drain hole is communicated with the drain port, the annular ring is located inside the magnetic gasket, and the annular ring matches the magnetic gasket.

[0015] Preferably, a first through hole is provided on the bottom side wall of the valve sleeve, a first slot is provided on the top outer wall of the valve sleeve, a second slot is provided on the side wall of the valve sleeve, the first slot is communicated with the second slot, a pressure relief groove is provided on the upper surface of the pressure relief gasket, a first flow hole is provided on the outer wall of the feedback sleeve, a second drain hole is provided in the middle of the leaf spring, the second drain hole corresponds to the push rod, and an arc-shaped pressure relief groove is provided on the outer wall of the leaf spring, the arc-shaped pressure relief groove corresponds to the first flow hole.

[0016] Preferably, the main-stage valve core is slidably sleeved inside the valve sleeve, a throttling hole is provided on the bottom outer wall of the main-stage valve core, a valve seat is fixedly sleeved on the bottom of the valve sleeve, a spring seat is provided inside the main-stage valve core, a second flow hole is provided on the outer wall of the spring seat, a main-stage hard spring is provided on the upper surface of the spring seat, one end of the main-stage hard spring is in contact with the outer wall of the spring seat, and the other end of the main-stage hard spring is in contact with the outer wall of the pressure relief gasket.

[0017] Preferably, a main-stage soft spring is arranged on the lower surface of the spring seat, one end of the main-stage soft spring contacts the outer wall of the spring seat, and the other end of the main-stage soft spring contacts the outer wall of the main-stage valve core.

[0018] Preferably, the throttle hole is located in the middle of the main valve core, the spring seat is located on a side close to the throttle hole, the spring seat is circular, and there are four second flow holes, which are distributed around the circle of the spring seat.

[0019] Preferably, an adjusting gasket is sleeved on the outer wall of the valve seat, and the other side of the adjusting gasket is in contact with the interior of the valve sleeve.

[0020] Preferably, the magnetic shell is in the shape of an annular sleeve, the inner wall of the magnetic shell is provided with an inner protrusion, the magnetic shell is provided with an annular groove at the inner protrusion, the annular groove matches the armature, a sealing ring is placed at the annular groove of the magnetic shell, the sealing ring and the magnetic sleeve are sleeved with each other, and the magnetic shell and the magnetic sleeve are integrally processed and formed;

[0021] The outer wall of the push rod is sleeved with a sealing gasket, the upper surface of the push rod is provided with an upper groove, the sealing gasket is located in the upper groove on the upper surface of the push rod, one end of the return spring contacts the outer wall of the armature, and the other end of the return spring contacts the outer wall of the sealing gasket.

[0022] Preferably, the magnetic shell and the magnetic sleeve are fixedly connected by interference fit, the magnetic sleeve and the magnetic gasket are fixedly connected by interference fit, and the valve sleeve and the magnetic shell are fixedly connected by interference fit.

[0023] A method for adjusting a pilot fluid pressure regulating device of a shock absorber solenoid valve comprises the following steps:

[0024] S1. After the expected current is applied to the electromagnetic mechanism, the push rod and the armature in the electromagnetic mechanism are attracted by the electromagnetic force, and the push rod and the armature move inside the cavity of the magnetic sleeve, transmitting the electromagnetic force to the outside of the electromagnetic part. At the same time, the reset spring cooperates with the armature, so that the armature is affected by the elastic force of the reset spring;

[0025] S2, in normal working state, the push rod is acted upon by the thrust of the electromagnetic part in the electromagnetic mechanism, and overcomes the force of the reset spring. At this time, the push rod acts on the surface of the leaf spring, and the second drain hole on the sealing leaf spring and the second through hole on the push rod and the inner cavity of the feedback sleeve form a pilot cavity;

[0026] A throttling chamber is formed by the feedback sleeve, the pressure relief groove on the pressure relief gasket and the end surface on the leaf spring. The oil from the main stage passes through the throttling chamber and forms a pilot pressure in the feedback sleeve. At this time, the oil from the main stage is discharged through the arc-shaped pressure relief groove at the throttling chamber and discharged through the discharge port on the magnetic gasket, the annular groove and the oil drain channel on the valve sleeve.

[0027] S3. When the push rod loses power unexpectedly, the push rod loses electromagnetic force control, and the reset spring pushes the push rod back. At this time, the annular ring on the push rod forms an end face seal with the magnetic gasket. At this time, the oil can only flow out from the first drain hole on the magnetic gasket, forming the required set damping;

[0028] At this time, the magnetic gasket, push rod and leaf spring constitute the pilot cavity in the failure mode, the first drain hole on the magnetic gasket constitutes a throttling channel, the flow of the pilot cavity flows out from the first drain hole on the magnetic gasket and forms a pilot flow in the pilot cavity.

[0029] The beneficial effects of the present invention are:

[0030] 1. Compared with the traditional shock absorber solenoid valve, the present invention cancels the design of the pilot valve core, avoids the failure modes such as the stuck slide valve in the pilot part, and further reduces the hysteresis of the system.

[0031] 2. In the present invention, through the design of the push rod and the magnetic gasket, when the push rod loses the control of the electromagnetic force, the annular ring on the push rod and the magnetic gasket form an end face seal, forcing the pressure to flow out from the first drain hole on the magnetic gasket, and providing protective damping through the fixed first drain hole. While being able to achieve stable protective damping, it can also provide an adjustment device for different protective damping according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a schematic structural diagram of a pilot fluid pressure regulating device of a shock absorber solenoid valve.

[0033] Figure 2 The present invention is a front view of a pilot fluid pressure regulating device for a shock absorber solenoid valve.

[0034] Figure 3 A pilot fluid pressure regulating device for a shock absorber solenoid valve of the present invention Figure 2 Cross-sectional view of AA.

[0035] Figure 4 The present invention is a schematic structural diagram of an electromagnetic mechanism of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0036] Figure 5 The present invention is a schematic structural diagram of a magnetic housing of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0037] Figure 6 The present invention is a schematic structural diagram of a push rod of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0038] Figure 7 The present invention is an axonometric view of a push rod of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0039] Figure 8 The present invention is a schematic structural diagram of a magnetic gasket of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0040] Fig. 9 The isometric view of a magnetic gasket of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve of the present invention.

[0041] Fig.10 The present invention is a schematic structural diagram of a valve body of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0042] Fig.11 The present invention is a schematic structural diagram of a push rod, a return spring and a magnetic washer of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0043] Fig.12 The present invention is a schematic structural diagram of a valve sleeve of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0044] Fig.13 The present invention is a schematic structural diagram of a pressure relief gasket, a feedback sleeve and a leaf spring of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0045] Fig.14 The present invention is a schematic structural diagram of a feedback sleeve of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0046] Fig.15 The present invention is a schematic structural diagram of a valve seat, a main-stage valve core and a spring seat of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0047] Fig.16 The present invention is a schematic structural diagram of a spring seat of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve.

[0048] Fig.17 This is a structural schematic diagram of a pilot fluid pressure regulating device of a shock absorber solenoid valve of the present invention; at this time, the push rod is in a working state.

[0049] Fig.18 This is a structural schematic diagram of a pilot fluid pressure regulating device of a shock absorber solenoid valve of the present invention; at this time, the push rod is in a failed state.

[0050] Fig.19 The present invention is a simplified structural diagram of a pilot-operated fluid pressure regulating device of a shock absorber solenoid valve in the prior art.

[0051] Numbers in the figure: 1, magnetic housing; 101, inner protrusion; 102, annular groove; 2, valve sleeve; 201, first through hole; 202, first notch; 203, second notch;

[0052] 3. Magnetic sleeve; 4. Armature; 5. Electromagnetic coil; 6. Push rod; 601. Second through hole; 602. Annular ring; 603. Annular groove;

[0053] 7. Reset spring; 8. Magnetic washer; 801. Upper groove; 802. First drain hole; 803. Drain port; 9. Sealing gasket;

[0054] 10. Pressure relief gasket; 1001. Pressure relief groove; 11. Feedback sleeve; 1101. First through-flow hole; 12. Leaf spring; 1201. Second discharge hole; 1202. Arc-shaped pressure relief groove;

[0055] 13. Main stage hard spring; 14. Valve seat; 15. Main stage valve core; 1501. Throttle hole; 16. Spring seat; 1601. Second flow hole; 17. Main stage soft spring; 18. Adjustment gasket. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0057] As attached Figure 1 To Attachment Fig.14 As shown:

[0058] A pilot fluid pressure regulating device for a shock absorber solenoid valve comprises an electromagnetic mechanism and a valve body, wherein the valve body is fixedly mounted on the output end of the electromagnetic mechanism;

[0059] The electromagnetic mechanism comprises a magnetic shell 1, a magnetic shell 3 is fixedly sleeved inside the magnetic shell 1, an armature 4 is slidably sleeved inside the magnetic shell 3, a magnetic washer 8 is fixedly sleeved at the bottom of the magnetic shell 3, a push rod 6 is slidably sleeved inside the magnetic washer 8, a reset spring 7 is sleeved on the outer wall of the push rod 6, the reset spring 7 is located between the armature 4 and the magnetic washer 8, and the push rod 6 is fixedly sleeved with the armature 4;

[0060] The valve body includes a valve sleeve 2, which is fixedly sleeved on the bottom of the magnetic shell 1. The magnetic gasket 8 and the valve sleeve 2 are sleeved with each other. A pressure relief gasket 10 is arranged inside the valve sleeve 2. A feedback sleeve 11 is sleeved in the middle of the pressure relief gasket 10. A leaf spring 12 is placed on the upper surface of the pressure relief gasket 10. The magnetic gasket 8 is in contact with the upper surface of the leaf spring 12, and the push rod 6 is located directly above the leaf spring 12.

[0061] The outer wall of the armature 4 is provided with a through hole, the top end of the push rod 6 extends into the through hole, the outer wall of the armature 4 is provided with an oil drain hole, there is at least one oil drain hole, the inner wall of the magnetic shell 1 is sleeved with an electromagnetic coil 5, and the electromagnetic coil 5 is located between the magnetic shell 1 and the magnetic sleeve 3.

[0062] In the above technical solution, after the expected current is passed through the electromagnetic mechanism of the shock absorber solenoid valve, the push rod 6 and the armature 4 in the electromagnetic mechanism are attracted by the electromagnetic force, and the push rod 6 and the armature 4 move inside the cavity of the magnetic sleeve 3, transmitting the electromagnetic force to the outside of the electromagnetic part. At the same time, the reset spring 7 cooperates with the armature 4, so that the armature 4 is acted upon by the elastic force of the reset spring 7.

[0063] As attached Figure 6 To Attachment Fig. 9 As shown, a second through hole 601 is provided at the axis of the push rod 6, an annular ring 602 is fixedly sleeved on the bottom outer wall of the push rod 6, the annular ring 602 is integrally formed with the push rod 6, and an annular groove 603 is provided on the bottom outer wall of the push rod 6, and the annular groove 603 is located directly above the push rod 6;

[0064] In the above technical solution, a second through hole 601 is opened at the axis center of the push rod 6, and the second through hole 601 is used to introduce the pressure in the feedback sleeve 11 into the electromagnetic part; the annular ring 602 is arranged perpendicular to the axial direction of the push rod 6, and is used to seal the pilot cavity formed at the bottom of the magnetic gasket 8, and its diameter is larger than the main body diameter of the push rod 6; the diameter of the annular groove 603 is smaller than the diameter of the entire push rod 6, and during operation, it provides a pressure relief channel for the pilot cavity of the magnetic gasket 8.

[0065] As attached Figure 8 To Attachment Fig.11As shown, a first drain hole 802 is opened inside the magnetic gasket 8, a drain port 803 is opened on the outer wall of the magnetic gasket 8, the first drain hole 802 is connected with the drain port 803, the annular ring 602 is located inside the magnetic gasket 8, and the annular ring 602 matches the magnetic gasket 8.

[0066] In the above technical solution, when the push rod 6 accidentally loses power and loses electromagnetic force control, the return spring 7 pushes the push rod 6 back and forms an end face seal with the annular ring 602 on the push rod 6 and the magnetic gasket 8. At this time, the oil can only flow out from the first drain hole 802 on the magnetic gasket 8 to form the required set damping; at this time, the magnetic gasket 8, the push rod 6 and the leaf spring 12 constitute a pilot cavity in the failure mode, and the first drain hole 802 on the magnetic gasket 8 constitutes a throttling channel. The flow of the pilot cavity flows out from the first drain hole 802 on the magnetic gasket 8 and forms a pilot flow in the pilot cavity, and then is discharged through the drain port 803.

[0067] As attached Fig.12 To Attachment Fig.14 As shown, a first through hole 201 is provided on the bottom side wall of the valve sleeve 2, a first slot 202 is provided on the top outer wall of the valve sleeve 2, a second slot 203 is provided on the side wall of the valve sleeve 2, the first slot 202 is communicated with the second slot 203, a pressure relief groove 1001 is provided on the upper surface of the pressure relief gasket 10, a first flow hole 1101 is provided on the outer wall of the feedback sleeve 11, a second drain hole 1201 is provided in the middle part of the leaf spring 12, the second drain hole 1201 corresponds to the push rod 6, an arc-shaped pressure relief groove 1202 is provided on the outer wall of the leaf spring 12, and the arc-shaped pressure relief groove 1202 corresponds to the first flow hole 1101.

[0068] In the above technical solution, the first notch 202 and the second notch 203 provide a pressure relief channel for the pilot cavity, and the feedback sleeve 11 is a series of thin-walled sleeves with different inner diameters, and has at least one circular or other shaped first flow hole 1101 on its surface for introducing the flow of the main stage.

[0069] As attached Fig.15 To Attachment Fig.16 As shown, the main-stage valve core 15 is slidably sleeved inside the valve sleeve 2, a throttling hole 1501 is provided on the bottom outer wall of the main-stage valve core 15, a valve seat 14 is fixedly sleeved on the bottom of the valve sleeve 2, a spring seat 16 is arranged inside the main-stage valve core 15, a second flow hole 1601 is provided on the outer wall of the spring seat 16, a main-stage hard spring 13 is arranged on the upper surface of the spring seat 16, one end of the main-stage hard spring 13 contacts the outer wall of the spring seat 16, and the other end of the main-stage hard spring 13 contacts the outer wall of the pressure relief gasket 10, a main-stage soft spring 17 is arranged on the lower surface of the spring seat 16, one end of the main-stage soft spring 17 contacts the outer wall of the spring seat 16, and the other end of the main-stage soft spring 17 contacts the outer wall of the main-stage valve core 15, and a main-stage double spring structure is adopted.

[0070] As attached Fig.15 To Attachment Fig.16 As shown, the throttle hole 1501 is located in the middle of the main stage valve core 15, and the spring seat 16 is located on the side close to the throttle hole 1501. The spring seat 16 is circular, and there are four second flow holes 1601. The four second flow holes 1601 are distributed around the circle of the spring seat 16.

[0071] In the above technical solution, assembling the spring seat 16 at one end close to the throttle hole 1501 allows the measuring device to better achieve measurement, improves the measurement accuracy, and further ensures the accuracy of the results;

[0072] Among them, by designing the second flow holes 1601 to avoid the central position and to be distributed around the circle, it is convenient for the displacement sensor to act on the spring seat 16, so that the real-time recording of the size can be achieved.

[0073] As attached Fig.15 As shown, an adjusting gasket 18 is sleeved on the outer wall of the valve seat 14 , and the other side of the adjusting gasket 18 is in contact with the interior of the valve sleeve 2 .

[0074] In the above technical solution, the contact pressure between the valve seat 14 and the main-stage valve core 15 can be adjusted by adjusting the thickness of the adjusting gasket 18 .

[0075] As attached Figure 4 To Attachment Figure 5 As shown, the shape of the magnetic housing 1 is an annular sleeve, the inner wall of the magnetic housing 1 is provided with an inner protrusion 101, the magnetic housing 1 is provided with an annular groove 102 at the inner protrusion 101, the annular groove 102 matches the armature 4, a sealing ring is placed at the annular groove 102 of the magnetic housing 1, the sealing ring and the magnetic sleeve 3 are mutually sleeved, and the magnetic housing 1 and the magnetic sleeve 3 are both integrally processed and formed;

[0076] In the above technical solution, the sealing ring is used to seal the electromagnetic part.

[0077] As attached Figure 4 To Attachment Figure 5 As shown, a sealing gasket 9 is sleeved on the outer wall of the push rod 6, an upper groove 801 is opened on the upper surface of the push rod 6, the sealing gasket 9 is located in the upper groove 801 on the upper surface of the push rod 6, one end of the return spring 7 contacts the outer wall of the armature 4, and the other end of the return spring 7 contacts the outer wall of the sealing gasket 9.

[0078] In the above technical solution, the sealing gasket 9 is used to seal the electromagnetic part. Through the design of the sealing gasket 9, the sealing performance between the magnetic gasket 8 and the push rod 6 is improved, and the oil leakage of the hydraulic part is reduced.

[0079] As attached Figure 1 To Attachment Figure 3 As shown, the magnetic housing 1 and the magnetic sleeve 3 are fixedly sleeved by interference fit, the magnetic sleeve 3 and the magnetic gasket 8 are fixedly sleeved by interference fit, and the valve sleeve 2 and the magnetic housing 1 are fixedly sleeved by interference fit.

[0080] In the above technical solution, the magnetic shell 1 and the magnetic sleeve 3, the valve sleeve 2 and the magnetic shell 1, and the magnetic sleeve 3 and the magnetic gasket 8 can be assembled by interference fit. Compared with the traditional welding processing technology, the process is simple, the cost is low, the production efficiency is high, and the production cycle is shortened.

[0081] A method for adjusting a pilot fluid pressure regulating device of a shock absorber solenoid valve comprises the following steps:

[0082] S1. After the expected current is applied to the electromagnetic mechanism, the push rod 6 and the armature 4 in the electromagnetic mechanism are attracted by the electromagnetic force, and the push rod 6 and the armature 4 move inside the cavity of the magnetic sleeve 3, transmitting the electromagnetic force to the outside of the electromagnetic part, and at the same time, the reset spring 7 cooperates with the armature 4, so that the armature 4 is acted upon by the elastic force of the reset spring 7;

[0083] S2, in normal working state, the push rod 6 is acted upon by the thrust of the electromagnetic part in the electromagnetic mechanism, and the push rod 6 overcomes the force of the reset spring 7. At this time, the push rod 6 acts on the surface of the leaf spring 12, and the second drain hole 1201 on the sealing leaf spring 12 and the second through hole 601 on the push rod 6 and the inner cavity of the feedback sleeve 11 form a pilot cavity;

[0084] A throttling chamber is formed by the feedback sleeve 11, the pressure relief groove 1001 on the pressure relief gasket 10 and the end surface of the leaf spring 12. The oil from the main stage passes through the throttling chamber and forms a pilot pressure in the feedback sleeve 11. At this time, the oil from the main stage is discharged through the arc-shaped pressure relief groove 1202 at the throttling chamber and discharged through the discharge port 803 on the magnetic gasket 8, the annular groove 603 and the oil drain channel on the valve sleeve 2.

[0085] S3. When the push rod 6 loses power unexpectedly, the push rod 6 loses electromagnetic force control, and the return spring 7 pushes the push rod 6 back. At this time, the annular ring 602 on the push rod 6 forms an end face seal with the magnetic gasket 8. At this time, the oil can only flow out from the first drain hole 802 on the magnetic gasket 8, forming the required set damping;

[0086] At this time, the magnetic gasket 8, the push rod 6 and the leaf spring 12 constitute a pilot cavity in the failure mode, and the first drain hole 802 on the magnetic gasket 8 constitutes a throttling channel. The flow of the pilot cavity flows out from the first drain hole 802 on the magnetic gasket 8 and forms a pilot flow in the pilot cavity.

[0087] The specific usage and function of this embodiment are as follows:

[0088] When the present invention is used, after the electromagnetic mechanism of the shock absorber electromagnetic valve is connected with the expected current, the push rod 6 and the armature 4 in the electromagnetic mechanism are attracted by the electromagnetic force, and the push rod 6 and the armature 4 move inside the cavity of the magnetic sleeve 3, and transmit the electromagnetic force to the outside of the electromagnetic part. At the same time, the reset spring 7 cooperates with the armature 4, so that the armature 4 is acted upon by the elastic force of the reset spring 7;

[0089] For the above structure and process, please refer to Figure 1-4 .

[0090] In normal working state, the push rod 6 is acted upon by the thrust of the electromagnetic part in the electromagnetic mechanism, and the push rod 6 overcomes the force of the reset spring 7. At this time, the push rod 6 acts on the surface of the leaf spring 12, and the second drain hole 1201 on the sealing leaf spring 12 and the second through hole 601 on the push rod 6 and the inner cavity of the feedback sleeve 11 form a pilot cavity;

[0091] A throttling chamber is formed by the feedback sleeve 11, the pressure relief groove 1001 on the pressure relief gasket 10 and the end surface of the leaf spring 12. The oil from the main stage passes through the throttling chamber and forms a pilot pressure in the feedback sleeve 11. At this time, the oil from the main stage is discharged through the arc-shaped pressure relief groove 1202 at the throttling chamber, and is discharged through the discharge port 803 on the magnetic gasket 8, the annular groove 603 and the oil drain channel on the valve sleeve 2. Fig.17 As shown, Q to Q2 provide a pressure relief channel for the pilot;

[0092] Therefore, the pilot pressure is directly controlled by the electromagnetic force of the electromagnetic part and will serve as the control pressure of the main stage overflow;

[0093] For the above structure and process, please refer to Figure 1-14 .

[0094] When the push rod 6 loses power unexpectedly, the push rod 6 loses electromagnetic force control, and the return spring 7 pushes the push rod 6 back, and the annular ring 602 on the push rod 6 forms an end face seal with the magnetic gasket 8. At this time, the oil can only flow out from the first drain hole 802 on the magnetic gasket 8, forming the required set damping;

[0095] At this time, the magnetic gasket 8, the push rod 6 and the leaf spring 12 constitute the pilot cavity in the failure mode, and the first drain hole 802 on the magnetic gasket 8 constitutes a throttling channel. The flow of the pilot cavity flows out from the first drain hole 802 on the magnetic gasket 8 and forms a pilot flow in the pilot cavity. Fig.18 As shown, Q to Q2 provide a pressure relief channel for the pilot;

[0096] This provides a certain control force for the main stage overflow and prevents the valve body from being unable to provide damping and losing control in the event of a failure.

[0097] For the above structure and process, please refer to Figure 1-14 .

[0098] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pilot fluid pressure regulating device for a shock absorber solenoid valve, comprising an electromagnetic mechanism and a valve body, characterized in that: The valve body is fixedly installed at the output end of the electromagnetic mechanism; The electromagnetic mechanism comprises a magnetic housing (1), a magnetic housing (3) fixedly sleeved inside the magnetic housing (1), an armature (4) slidably sleeved inside the magnetic housing (3), a magnetic washer (8) fixedly sleeved at the bottom of the magnetic housing (3), a push rod (6) slidably sleeved inside the magnetic washer (8), a return spring (7) sleeved on the outer wall of the push rod (6), and the return spring (7) located between the armature (4) and the magnetic washer (8); The valve body comprises a valve sleeve (2), the valve sleeve (2) is fixedly sleeved on the bottom of the magnetic housing (1), the magnetic gasket (8) and the valve sleeve (2) are sleeved with each other, a pressure relief gasket (10) is arranged inside the valve sleeve (2), a feedback sleeve (11) is sleeved in the middle of the pressure relief gasket (10), a leaf spring (12) is placed on the upper surface of the pressure relief gasket (10), the magnetic gasket (8) is in contact with the upper surface of the leaf spring (12), and the push rod (6) is located directly above the leaf spring (12); The armature (4) has an outer wall with a through hole, the top end of the push rod (6) extends into the through hole, the armature (4) has an outer wall with an oil drain hole, the oil drain hole being at least one, the inner wall of the magnetic housing (1) is sleeved with an electromagnetic coil (5), and the electromagnetic coil (5) is located between the magnetic housing (1) and the magnetic sleeve (3); A second through hole (601) is provided at the axis of the push rod (6); an annular ring (602) is fixedly sleeved on the bottom outer wall of the push rod (6); the annular ring (602) and the push rod (6) are integrally formed; an annular groove (603) is provided on the bottom outer wall of the push rod (6); the annular groove (603) is located directly above the push rod (6); The magnetic gasket (8) has a first drain hole (802) formed inside, and the outer wall of the magnetic gasket (8) has a drain port (803) formed thereon, the first drain hole (802) being in communication with the drain port (803), the annular ring (602) being located inside the magnetic gasket (8), and the annular ring (602) matching the magnetic gasket (8); A first through hole (201) is provided on the bottom side wall of the valve sleeve (2), a first notch (202) is provided on the top outer wall of the valve sleeve (2), a second notch (203) is provided on the side wall of the valve sleeve (2), the first notch (202) and the second notch (203) are communicated with each other, a pressure relief groove (1001) is provided on the upper surface of the pressure relief gasket (10), a first through-flow hole (1101) is provided on the outer wall of the feedback sleeve (11), a second discharge hole (1201) is provided in the middle of the leaf spring (12), the second discharge hole (1201) and the push rod (6) correspond to each other, an arc-shaped pressure relief groove (1202) is provided on the outer wall of the leaf spring (12), and the arc-shaped pressure relief groove (1202) and the first through-flow hole (1101) correspond to each other; The valve sleeve (2) is internally slidably sleeved with a main-stage valve core (15), the bottom outer wall of the main-stage valve core (15) is provided with a throttling hole (1501), the bottom of the valve sleeve (2) is fixedly sleeved with a valve seat (14), the main-stage valve core (15) is internally provided with a spring seat (16), the outer wall of the spring seat (16) is provided with a second flow hole (1601), the upper surface of the spring seat (16) is provided with a main-stage hard spring (13), one end of the main-stage hard spring (13) is in contact with the outer wall of the spring seat (16), and the other end of the main-stage hard spring (13) is in contact with the outer wall of the pressure relief gasket (10); The magnetic shell (1) is in the shape of an annular sleeve, the inner wall of the magnetic shell (1) is provided with an inner protrusion (101), the magnetic shell (1) is provided with an annular groove (102) at the inner protrusion (101), the annular groove (102) matches the armature (4), the magnetic shell (1) is provided with a sealing ring at the annular groove (102), the sealing ring and the magnetic sleeve (3) are mutually sleeved, and the magnetic shell (1) and the magnetic sleeve (3) are both integrally processed and formed; The outer wall of the push rod (6) is sleeved with a sealing gasket (9), the upper surface of the push rod (6) is provided with an upper groove (801), the sealing gasket (9) is located in the upper groove (801) on the upper surface of the push rod (6), one end of the return spring (7) contacts the outer wall of the armature (4), and the other end of the return spring (7) contacts the outer wall of the sealing gasket (9).

2. A pilot-operated fluid pressure regulating device for a shock absorber solenoid valve according to claim 1, characterized in that: A main-stage soft spring (17) is arranged on the lower surface of the spring seat (16), one end of the main-stage soft spring (17) contacts the outer wall of the spring seat (16), and the other end of the main-stage soft spring (17) contacts the outer wall of the main-stage valve core (15).

3. The pilot-operated fluid pressure regulating device for a shock absorber solenoid valve according to claim 1, characterized in that: The throttle hole (1501) is located in the middle of the main valve core (15), the spring seat (16) is located on a side close to the throttle hole (1501), the spring seat (16) is circular, and there are four second flow holes (1601), which are distributed around the circle of the spring seat (16).

4. The pilot-operated fluid pressure regulating device for a shock absorber solenoid valve according to claim 3, characterized in that: An adjusting gasket (18) is sleeved on the outer wall of the valve seat (14), and the other side of the adjusting gasket (18) is in contact with the interior of the valve sleeve (2).

5. The pilot-operated fluid pressure regulating device for a shock absorber solenoid valve according to claim 1, characterized in that: The magnetic housing (1) and the magnetic sleeve (3) are fixedly sleeved by an interference fit, the magnetic sleeve (3) and the magnetic gasket (8) are fixedly sleeved by an interference fit, and the valve sleeve (2) and the magnetic housing (1) are fixedly sleeved by an interference fit.

6. A pilot fluid pressure regulating method for a shock absorber solenoid valve, the method being implemented based on the pilot fluid pressure regulating device for a shock absorber solenoid valve according to claim 1, characterized in that: The following steps are involved: S1. After the electromagnetic mechanism is supplied with the expected current, the push rod (6) and the armature (4) in the electromagnetic mechanism are attracted by the electromagnetic force, and the push rod (6) and the armature (4) move inside the cavity of the magnetic sleeve (3) to transmit the electromagnetic force to the outside of the electromagnetic part. At the same time, the return spring (7) cooperates with the armature (4), so that the armature (4) is acted upon by the elastic force of the return spring (7); S2, in a normal working state, the push rod (6) is acted upon by the thrust of the electromagnetic part in the electromagnetic mechanism, and the push rod (6) overcomes the force of the return spring (7). At this time, the push rod (6) acts on the surface of the leaf spring (12), and the second drain hole (1201) on the sealing leaf spring (12) and the second through hole (601) on the push rod (6) and the inner cavity of the feedback sleeve (11) form a pilot cavity; A throttling chamber is formed by the feedback sleeve (11), the pressure relief groove (1001) on the pressure relief gasket (10), and the end surface on the leaf spring (12); the oil from the main stage passes through the throttling chamber and forms a pilot pressure in the feedback sleeve (11); at this time, the oil from the main stage is discharged through the arc-shaped pressure relief groove (1202) at the throttling chamber and is discharged through the discharge port (803) on the magnetic gasket (8), the annular groove (603), and the oil drain channel on the valve sleeve (2); S3. When the push rod (6) loses power unexpectedly, the push rod (6) loses electromagnetic force control, and the return spring (7) pushes the push rod (6) back. At this time, the annular ring (602) on the push rod (6) and the magnetic gasket (8) form an end face seal. At this time, the oil can only flow out from the first drain hole (802) on the magnetic gasket (8), forming the required set damping; At this time, the magnetic gasket (8), the push rod (6) and the leaf spring (12) constitute a pilot cavity in the failure mode, the first drain hole (802) on the magnetic gasket (8) constitutes a throttling channel, and the flow of the pilot cavity flows out from the first drain hole (802) on the magnetic gasket (8) and forms a pilot flow in the pilot cavity.

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