External electromagnetic valve shock absorber structure

Abstract

The invention provides an external electromagnetic valve shock absorber structure, and relates to the technical field of electric control shock absorbers, the external electromagnetic valve shock absorber structure comprises a working cylinder, a separation oil cylinder and an oil storage cylinder, the separation oil cylinder is located in the oil storage cylinder, the separation oil cylinder sleeves the periphery of the working cylinder, the two ends of the working cylinder are fixedly connected with the inner walls of the two ends of the oil storage cylinder respectively, and a circulation hole is formed in the working cylinder in a penetrating mode; a circulation hole is formed in the working cylinder and communicated with the oil storage cylinder, a liquid outlet hole is further formed in the working cylinder and communicated with the separation oil cylinder, a piston is arranged in the working cylinder in a sliding mode, and the circulation hole and the liquid outlet hole are located on the two sides of the piston respectively. According to the shock absorber structure with the external electromagnetic valve, the original first-generation pilot valve seat, a connector, an oil passing shaft, a first-generation backflow valve seat and a valve block are replaced by the arranged pilot valve seat and the arranged backflow valve seat, the internal structure of the electromagnetic valve is simplified, the height of the electromagnetic valve is reduced, the shock absorber structure can adapt to a smaller installation space, the application range is wide, the number of parts is reduced, and cost is reduced. The assembly process is simplified and the production time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of electronically controlled shock absorbers, and in particular to an external electromagnetic valve shock absorber structure. Background Art

[0002] Electronically controlled shock absorbers are an advanced automotive suspension system technology that adjusts the damping force of the shock absorber in real time through the electronic control system to adapt to different driving conditions and road conditions, thereby improving the vehicle's handling, comfort and stability. The working principle is: the electronically controlled shock absorber is equipped with a solenoid valve, which can adjust the damping force of the shock absorber in real time through the electronic control unit (ECU) according to the vehicle's driving state and the driver's operation. This adjustment can be continuous or graded to adapt to different driving needs; it has the following characteristics: real-time response, the electronically controlled shock absorber can quickly respond to changes in the vehicle's driving state, such as acceleration, deceleration, turning, etc., and adjust the performance of the suspension system in time; personalized settings, the driver can choose different suspension modes such as sports and comfort according to his driving habits and preferences; energy saving and environmental protection: the electronically controlled shock absorber can provide greater damping force when needed, reduce unnecessary energy consumption, and help improve fuel economy; intelligent control: by cooperating with other vehicle control systems (such as ABS, ESP, etc.), more advanced driving assistance functions can be achieved.

[0003] The existing external solenoid valve mechanism is usually composed of a joint, a pilot valve seat, a sealing valve plate, an oil shaft return valve seat, a blocking valve plate, a coil, etc. The entire solenoid valve is relatively high and cannot meet the layout requirements of customers. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes an external solenoid valve damper structure.

[0005] The present invention proposes an external electromagnetic valve damper structure, comprising a working cylinder, a separation oil cylinder and an oil storage cylinder, wherein the separation oil cylinder is located in the oil storage cylinder, the separation oil cylinder is sleeved on the outer periphery of the working cylinder, the two ends of the working cylinder are respectively fixedly connected to the inner walls of the two ends of the oil storage cylinder, a flow hole is opened through the working cylinder, the flow hole is connected to the oil storage cylinder, the working cylinder is also opened with a liquid outlet hole, the liquid outlet hole is connected to the separation oil cylinder, a piston is slidably arranged in the working cylinder, and the flow hole and the liquid outlet hole are respectively located on both sides of the piston; An electromagnetic valve housing is fixedly installed on the periphery of the oil storage cylinder, a relatively closed cavity is formed between the electromagnetic valve housing and the oil storage cylinder, the cavity is communicated with the oil storage cylinder, a pilot valve seat is fixedly installed on the periphery of the separation oil cylinder, the pilot valve seat is communicated with the separation oil cylinder, the pilot valve seat penetrates the oil storage cylinder and extends into the electromagnetic valve housing, a return valve seat is fixedly connected to one end of the pilot valve seat away from the separation oil cylinder, a main oil passage is provided between the pilot valve seat and the return valve seat, and a blocking valve sheet capable of blocking the main oil passage is installed between the pilot valve seat and the return valve seat; A coil is installed at one end of the solenoid valve housing away from the oil storage cylinder, a straight rod is installed in the coil, the coil is used to drive the straight rod to slide, an end cap is fixedly installed at the end of the straight rod, the end cap can block the middle opening of the reflux valve seat, a pilot oil passage is formed between the reflux valve seat and the safety valve assembly, a sealing valve plate is sleeved on the straight rod, and an elastic member is connected between the end cap and the sealing valve plate; A pressure regulating chamber is arranged between the blocking valve plate and the reflux valve seat, and a throttling hole communicating with the pressure regulating chamber is opened on the inner wall of the reflux valve seat.

[0006] Preferably, the solenoid valve housing includes a solenoid valve sleeve, a solenoid valve outer cylinder, a solenoid valve protective cover and a safety valve assembly; one end of the solenoid valve sleeve is fixedly connected to the outer periphery of the oil storage cylinder, the solenoid valve outer cylinder is installed at the end of the solenoid valve sleeve away from the oil storage cylinder, the solenoid valve protective cover is threadedly sleeved on the end of the solenoid valve sleeve away from the oil storage cylinder, the safety valve assembly is fixedly installed in the solenoid valve outer cylinder, and a sliding hole is opened through the safety valve assembly to slide with the straight rod.

[0007] Preferably, the pilot valve seat comprises a tubular structure and a disc-shaped structure, the disc-shaped structure is sleeved on the middle section of the tubular structure, one end of the tubular structure is fixedly connected to the separation cylinder, and the other end of the tubular structure is threadedly connected to the return valve seat; A first annular groove is provided on one side of the disc-shaped structure close to the reflux valve seat, and a plurality of main channel communication holes communicating with the first annular groove are provided in the circumferential direction of the inner wall of the tubular structure.

[0008] Preferably, the reflux valve seat comprises a cylindrical structure, a second annular groove is provided on one side of the reflux valve seat close to the pilot valve seat, a pilot channel hole is provided through the center of the reflux valve seat, the threaded section of the tubular structure of the pilot valve seat is threadedly inserted in the pilot channel hole, and the openings at both ends of the throttling hole are respectively located on the inner wall of the pilot channel hole and the inner wall of the second annular groove.

[0009] Preferably, during the piston resetting process, when the end cap blocks the pilot channel hole, the oil in the working cylinder enters the separation cylinder through the liquid outlet hole, the oil enters the tubular structure from the separation cylinder, and the oil enters the No. 1 annular groove through the main channel connecting hole. The sealing valve plate is deformed by the oil pressure and opens the main oil channel, the oil enters the solenoid valve sleeve and flows into the oil storage cylinder, and the oil in the oil storage cylinder enters the working cylinder through the reflux hole.

[0010] Preferably, during the piston resetting process, when the end cap does not block the pilot channel hole, the oil in the working cylinder enters the separation cylinder through the liquid outlet hole, and the oil then enters the tubular structure of the pilot valve seat from the separation cylinder, and the oil then reaches the sealing valve plate through the pilot channel hole. The sealing valve plate is pulled by the end cap and deformed, opening the pilot oil channel, and the oil enters the solenoid valve sleeve, and then enters the oil storage cylinder, and then flows into the working cylinder through the reflux hole.

[0011] Preferably, the diameter of the main channel communication hole is 2.2 mm.

[0012] An external solenoid valve damper structure proposed in the present invention has the following beneficial effects: by replacing the original first-generation pilot valve seat, joint, oil-passing shaft, first-generation return valve seat and valve plate with the provided pilot valve seat and return valve seat, the internal structure of the solenoid valve is simplified, the height of the solenoid valve is reduced, it can adapt to a smaller installation space, has a wide range of applications, reduces the number of parts, simplifies the assembly process, and reduces production time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of the solenoid valve structure of an external solenoid valve damper structure proposed by the present invention; Figure 2 This is a cross-sectional view of the overall structure of an external solenoid valve shock absorber structure proposed by the present invention; Figure 3 A cross-sectional view of an IP assembly in an external solenoid valve damper structure proposed by the present invention; Figure 4 A schematic diagram of the structure of a pilot valve seat in an external solenoid valve damper structure proposed by the present invention; Figure 5 A side sectional view of a pilot valve seat in an external solenoid valve damper structure proposed by the present invention; Figure 6 A top view of a pilot valve seat in an external solenoid valve damper structure proposed by the present invention; Figure 7 A schematic diagram of the structure of a return valve seat in an external solenoid valve damper structure proposed by the present invention; Figure 8 A side cross-sectional view of a return valve seat in an external electromagnetic valve damper structure proposed by the present invention; Fig. 9 A schematic diagram of the structure of an elastic member in an external electromagnetic valve shock absorber structure proposed by the present invention; Fig.10 A cross-sectional view of a pilot valve assembly in an external solenoid valve damper structure proposed by the present invention; Fig.11 It is a cross-sectional view of the IP assembly in the existing external solenoid valve damper structure; Fig.12 It is a cross-sectional view of a pilot valve assembly in an existing external solenoid valve shock absorber structure; Fig.13 It is a top view and a side sectional view of a joint in a conventional external solenoid valve damper structure; Fig.14 It is a side sectional view and a top view of a first generation pilot valve seat in the existing external solenoid valve damper structure; Fig.15 It is a side sectional view and a top view of the oil-passing shaft in the existing external solenoid valve shock absorber structure; Fig.16 It is a top view and a side sectional view of a first generation return valve seat in the existing external solenoid valve damper structure; Fig.17 A schematic diagram of the structure of another pilot valve seat in an external solenoid valve damper structure proposed by the present invention; Fig.18 A schematic diagram of the three-dimensional structure of an outer cylinder of a solenoid valve in an external solenoid valve shock absorber structure proposed by the present invention from a side view; Fig.19 A schematic diagram of the three-dimensional structure of an end view of an outer cylinder of a solenoid valve in an external solenoid valve damper structure proposed by the present invention; Fig. 20 The present invention provides a schematic structural diagram of a solenoid valve protective cover in an external solenoid valve damper structure.

[0014] In the figure: 1. working cylinder; 2. separation cylinder; 3. oil storage cylinder; 4. safety valve assembly; 5. throttle hole; 6. pilot valve seat; 7. return valve seat; 8. blocking valve plate; 9. coil; 10. straight rod; 11. end cap; 12. sealing valve plate; 13. solenoid valve sleeve; 14. solenoid valve outer cylinder; 15. solenoid valve cover; 16. connector; 17. first-generation pilot valve seat; 18. oil-passing shaft; 19. first-generation return valve seat; 20. elastic member; 21. groove. DETAILED DESCRIPTION

[0015] Reference Figure 1-Figure 20The present invention proposes an external solenoid valve shock absorber structure, including a working cylinder 1, a separation oil cylinder 2 and an oil storage cylinder 3. The separation oil cylinder 2 is located in the oil storage cylinder 3, and the separation oil cylinder 2 is sleeved on the outer periphery of the working cylinder 1. The two ends of the working cylinder 1 are respectively fixedly connected to the inner walls of the two ends of the oil storage cylinder 3. The two ends of the working cylinder 1 are connected to a guide seat and a support seat respectively. The working cylinder 1 is fixedly connected to the guide seat, and the working cylinder 1 is fixedly connected to the support seat. A flow hole is opened through the working cylinder 1, and the flow hole is connected to the oil storage cylinder 3. A liquid outlet hole is also opened on the working cylinder 1, and the liquid outlet hole is connected to the separation oil cylinder 2. A piston is slidably arranged in the working cylinder 1, and the piston is fixedly connected to one end of the telescopic rod, and one end of the telescopic rod passes through the end of the working cylinder 1 and extends to the outside of the working cylinder 1. The flow hole and the liquid outlet hole are respectively located on both sides of the piston; the installation and connection method of the working cylinder 1, the separation oil cylinder 2 and the oil storage cylinder 3 is the existing technology, and no redundant introduction is made thereto.

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown in the figure, a solenoid valve housing is fixedly installed on the periphery of the oil storage cylinder 3, a relatively closed cavity is formed between the solenoid valve housing and the oil storage cylinder 3, and the cavity is communicated with the oil storage cylinder 3. A pilot valve seat 6 is fixedly installed on the periphery of the separation cylinder 2, and the pilot valve seat 6 is communicated with the separation cylinder 2. The pilot valve seat 6 penetrates the oil storage cylinder 3 and extends into the solenoid valve housing. A return valve seat 7 is fixedly connected to one end of the pilot valve seat 6 away from the separation cylinder 2. A main oil passage is provided between the pilot valve seat 6 and the return valve seat 7. A plugging valve plate 8 capable of plugging the main oil channel is installed in the middle, and the plugging valve plate 8 includes a pilot valve plugging valve plate, a pilot valve valve plate and a pilot valve sealing valve plate, etc. The plugging valve plate 8 is a prior art and has not been improved, so no redundant introduction is made to it; the pilot valve seat 6 includes a tubular structure and a disc-shaped structure, the disc-shaped structure is sleeved in the middle section of the tubular structure, one end of the tubular structure is fixedly connected to the separation cylinder 2, and the other end of the tubular structure is threadedly connected to the return valve seat 7; the disc-shaped structure is provided on one side close to the return valve seat 7 The inner wall of the tubular structure is provided with a plurality of main channel connecting holes connected with the No. 1 annular groove in the circumferential direction, and the diameter of the main channel connecting holes is 2.2 mm; a coil 9 is installed at one end of the solenoid valve housing away from the oil storage cylinder 3, and a straight rod 10 is installed in the coil 9. The coil 9 is used to drive the straight rod 10 to slide. An end cap 11 is fixedly installed at the end of the straight rod 10, and the end cap 11 can block the middle opening of the reflux valve seat 7. A pilot oil passage is formed between the reflux valve seat 7 and the safety valve assembly 4, and a sealing valve is mounted on the straight rod 10. The end cap 11 is connected to the sealing valve plate 12 with an elastic member 20. The sealing valve plate 12 includes a safety valve gasket, a sealing valve plate in the pilot valve, a safety valve plate, a safety valve special-shaped gasket, etc. This is a prior art and has not been improved. No redundant introduction is made to it. A pressure regulating chamber is provided between the sealing valve plate 8 and the reflux valve seat 7. A throttling hole 5 communicating with the pressure regulating chamber is provided on the inner wall of the reflux valve seat 7 (the throttling hole 5 can also be replaced by a groove 21 provided on the threaded section of the tubular structure of the pilot valve seat 6, as shown in the specific Fig.17 As shown in Figure ), the two oil circuits of the shock absorber are as follows Fig.10 As shown in: During the recovery and compression stroke of the shock absorber, the oil in the working cylinder 1 is squeezed into the separation cylinder 2, and the inner hole of the branch port of the separation cylinder 2 is interference-fitted with the O-ring of the pilot valve seat 6 to form a seal, and the oil in the separation cylinder 2 is introduced into the solenoid valve; the internal oil circuit of the solenoid valve is divided into two parts, the first oil circuit is the main oil circuit, see Fig.10, the oil circulation mode is as follows: the pilot valve seat 6 is internally designed with a 6-Φ2.2 main channel connecting hole, and the oil passes through the main channel connecting hole and enters the sealed cavity formed by the pilot valve seat 6 and the blocking valve plate 8. When the pressure reaches a certain value, the pilot valve sealing valve plate and the pilot valve valve plate are lifted up, and the oil flows back to the oil storage cylinder 3, and the pressure is reduced; during the piston resetting process, when the end cap 11 blocks the pilot channel hole, the oil in the working cylinder 1 enters the separation cylinder 2 through the liquid outlet hole, and the oil enters the tubular structure from the separation cylinder 2, and the oil enters the No. 1 annular groove through the main channel connecting hole. The blocking valve plate 8 is deformed by the oil pressure and opens the main oil channel, and the oil enters the solenoid valve sleeve 13 and flows into the oil storage cylinder 3. The oil in the oil storage cylinder 3 enters the working cylinder 1 through the reflux hole; The second oil circuit is called the pilot oil circuit. The oil flows through the main flow hole of the pilot valve seat 6. Part of the oil flows into the safety valve chamber, and part of the oil flows through the oil shaft throttle hole 5 (see Fig.10 ) returns to the upper cavity of the pilot valve sealing valve disc (at this time, the pressures on the upper and lower sides of the sealing valve disc 8 are consistent, and the sealing valve disc 8 is not easy to deform); the oil reaches the solenoid valve housing through the hole on the sealing valve disc 12, and the reflux valve seat 7 includes a cylindrical structure. A second annular groove is provided on the side of the reflux valve seat 7 close to the pilot valve seat 6, and a pilot channel hole is provided through the center of the reflux valve seat 7. The threaded section of the tubular structure of the pilot valve seat 6 is threadedly inserted in the pilot channel hole, and the openings at both ends of the throttling hole 5 are respectively located on the inner wall of the pilot channel hole. , the inner wall of the No. 2 annular groove; during the piston resetting process, when the end cap 11 does not block the pilot channel hole, the oil in the working cylinder 1 enters the separation cylinder 2 through the outlet hole, and the oil then enters the tubular structure of the pilot valve seat 6 from the separation cylinder 2, and the oil then passes through the pilot channel hole to reach the sealing valve plate 12. The sealing valve plate 12 is pulled by the end cap 11 and deformed, opening the pilot oil channel, and the oil enters the solenoid valve sleeve 13, and then enters the oil storage cylinder 3, and then flows into the working cylinder 1 through the reflux hole.

[0017] Its working principle is that the damping force control principle of the electronically controlled shock absorber is: by adjusting the current passed through the coil 9, the size of the electromagnetic force is adjusted, and the electromagnetic force pushes the end cap 11. The end cap 11 contacts the return valve seat 7 and blocks the hole of the return valve seat 7, thereby changing the pressure of the pilot oil circuit. When the input current is small, the pressure of the pilot oil circuit is small, and the pressure difference between the main oil circuit and the pilot oil circuit is large, the blocking valve plate 8 is easy to open and the damping force is small; when the input current is large, the pressure of the pilot oil circuit is large, and the pressure difference between the main oil circuit and the pilot oil circuit is small, the blocking valve plate 8 is difficult to open and the damping force is large.

[0018] like Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 and Fig.16As shown in , the difference between the interior of the solenoid valve housing of the existing solenoid valve shock absorber and the one in this solution is that one end of the connector 16 is directly connected to the separation cylinder 2, and the other end of the connector 16 is connected to the first-generation pilot valve seat 17. The first-generation pilot valve seat 17 and the first-generation return valve seat 19 are connected through the oil-through shaft 18. At the same time, a valve plate is also provided between the oil-through shaft 18 and the first-generation return valve seat 19, which makes the structural height of the entire solenoid valve too high and cannot meet the actual needs. Therefore, it is improved as follows: like Figure 1 and Figure 2 As shown in, the solenoid valve housing includes a solenoid valve sleeve 13, a solenoid valve outer cylinder 14, a solenoid valve protective cover 15 and a safety valve assembly 4; one end of the solenoid valve sleeve 13 is fixedly connected to the outer periphery of the oil storage cylinder 3, the solenoid valve outer cylinder 14 is installed at the end of the solenoid valve sleeve 13 away from the oil storage cylinder 3, the solenoid valve protective cover 15 is threadedly sleeved on the end of the solenoid valve sleeve 13 away from the oil storage cylinder 3, the safety valve assembly 4 is fixedly installed in the solenoid valve outer cylinder 14, and a sliding hole that slides with the straight rod 10 is opened through the safety valve assembly 4. The structural features of the newly designed solenoid valve shock absorber are as follows: 1. The diameter of the flow hole of the oil storage cylinder 3 is increased (Φ20→Φ31), which provides space for the valve body to sink and the structure to be optimized, and the height occupied by the original cylinder wall is eliminated; 2. The solenoid valve sleeve 13 has a new structure design, with increased side wall thickness and an additional limit boss; the lower support surface is eliminated, which reduces the height contributed by the valve body and the total height of the solenoid valve; 3. The pilot valve seat 6 is newly designed. The material is processed by powder metallurgy → precision machining, with higher dimensional accuracy. The upper end is connected to the return valve seat 7 through threads, and the overall height is reduced; 4. The reflux valve seat 7 is newly designed. The valve seat is precision machined, with higher dimensional accuracy and unchanged materials. The valve seat is fixed by the solenoid valve sleeve 13, and the overall height is reduced. 5. The oil-passing shaft 18 is cancelled and combined with the pilot valve seat 6 into one part. The connection method is changed from the original press-fit to threaded connection (same as the compression valve method), and the overall height is reduced; details are as follows: Since the original solenoid valve cover (metal) was cancelled and a plastic cover was added, the functions of the two covers are different. The original solenoid valve cover (metal) is used to apply torque, and the current cover is used to protect the riveted position of the solenoid valve; the tightening process was cancelled and replaced with riveting, and the retaining spring was cancelled; the sealing valve plate and valve plate ( Fig.11 The position circled at A in the middle); the edge groove is used for limiting the circumferential direction positioning, and an annular boss is added to the outside of the solenoid valve outer tube 14 for riveting; the height of the coil 9 is reduced, and the structure is simplified.

[0019] The assembly process is: 1. Assemble the O-ring on the pilot valve seat 6; 2. Install the plugging valve disc 8 (pilot valve disc, pilot valve sealing valve disc, pilot valve adjusting gasket, pilot valve plugging valve disc) into the tubular structure of the pilot valve seat 6; 3. Align the reflux valve seat 7, the pilot valve seat 6 and the middle valve plate and tighten them with a certain torque; 4. Assemble the above parts and the safety valve assembly to form a pilot valve assembly. Fig.10 It is a pilot valve assembly; 5. Assemble the pilot valve assembly and the solenoid valve outer tube 14, and then assemble the O-ring to form the IP assembly. Figure 3 For IP assembly; 6. Install the IP assembly into the solenoid valve sleeve 13, and use the tool to roll the outer edge of the solenoid valve sleeve 13 to complete the press fitting; 7. Finally, press-fit the solenoid valve cover 15 and the coil 9.

[0020] The above description is only a preferred specific implementation manner 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 scheme and inventive concept 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. An external electromagnetic valve damper structure, characterized in that: The invention comprises a working cylinder (1), a separation cylinder (2) and an oil storage cylinder (3), wherein the separation cylinder (2) is located in the oil storage cylinder (3), the separation cylinder (2) is sleeved on the outer periphery of the working cylinder (1), the two ends of the working cylinder (1) are respectively fixedly connected to the inner walls of the two ends of the oil storage cylinder (3), the working cylinder (1) is provided with a flow hole through it, the flow hole is connected to the oil storage cylinder (3), the working cylinder (1) is also provided with a liquid outlet hole, the liquid outlet hole is connected to the separation cylinder (2), a piston is slidably arranged in the working cylinder (1), and the flow hole and the liquid outlet hole are respectively located on both sides of the piston; A solenoid valve housing is fixedly mounted on the outer periphery of the oil storage cylinder (3), a relatively closed cavity is formed between the solenoid valve housing and the oil storage cylinder (3), and the cavity is in communication with the oil storage cylinder (3); a pilot valve seat (6) is fixedly mounted on the outer periphery of the separation oil cylinder (2), and the pilot valve seat (6) is in communication with the separation oil cylinder (2); the pilot valve seat (6) penetrates the oil storage cylinder (3) and extends into the solenoid valve housing; a return valve seat (7) is fixedly connected to one end of the pilot valve seat (6) away from the separation oil cylinder (2); a main oil passage is provided between the pilot valve seat (6) and the return valve seat (7); and a blocking valve plate (8) capable of blocking the main oil passage is installed between the pilot valve seat (6) and the return valve seat (7); A coil (9) is mounted on one end of the solenoid valve housing away from the oil storage cylinder (3), a straight rod (10) is mounted inside the coil (9), the coil (9) is used to drive the straight rod (10) to slide, an end cap (11) is fixedly mounted on the end of the straight rod (10), the end cap (11) is capable of blocking a central opening of the return valve seat (7), a pilot oil passage is formed between the return valve seat (7) and the safety valve assembly (4), a sealing valve plate (12) is sleeved on the end cap (11), and an elastic member (20) is further connected between the end cap (11) and the sealing valve plate (12); A pressure regulating chamber is provided between the blocking valve plate (8) and the reflux valve seat (7), and a throttling hole (5) communicating with the pressure regulating chamber is provided on the inner wall of the reflux valve seat (7).

2. The external electromagnetic valve damper structure according to claim 1, characterized in that: The solenoid valve housing comprises a solenoid valve sleeve (13), a solenoid valve outer cylinder (14), a solenoid valve protective cover (15) and a safety valve assembly (4); one end of the solenoid valve sleeve (13) is fixedly connected to the outer periphery of the oil storage cylinder (3), the solenoid valve outer cylinder (14) is installed on the end of the solenoid valve sleeve (13) away from the oil storage cylinder (3), the solenoid valve protective cover (15) is threadedly sleeved on the end of the solenoid valve sleeve (13) away from the oil storage cylinder (3), the safety valve assembly (4) is fixedly installed in the solenoid valve outer cylinder (14), and a sliding hole is penetrated through the safety valve assembly (4) and is slidably matched with the straight rod (10).

3. The external electromagnetic valve damper structure according to claim 1, characterized in that: The pilot valve seat (6) comprises a tubular structure and a disc-shaped structure, the disc-shaped structure is sleeved on the middle section of the tubular structure, one end of the tubular structure is fixedly connected to the separation cylinder (2), and the other end of the tubular structure is threadedly connected to the return valve seat (7); A first annular groove is provided on one side of the disc-shaped structure close to the reflux valve seat (7), and a plurality of main channel communication holes communicating with the first annular groove are provided in the circumferential direction of the inner wall of the tubular structure.

4. The external electromagnetic valve damper structure according to claim 3, characterized in that: The return valve seat (7) comprises a cylindrical structure, a second annular groove is provided on a side of the return valve seat (7) close to the pilot valve seat (6), a pilot channel hole is provided through the center of the return valve seat (7), a threaded section of the tubular structure of the pilot valve seat (6) is threadedly inserted into the pilot channel hole, and the openings at both ends of the throttling hole (5) are respectively located on the inner wall of the pilot channel hole and the inner wall of the second annular groove.

5. The external electromagnetic valve damper structure according to claim 4, characterized in that: During the piston resetting process, when the end cap (11) blocks the pilot channel hole, the oil in the working cylinder (1) enters the separation cylinder (2) through the outlet hole, the oil enters the tubular structure from the separation cylinder (2), and then enters the No. 1 annular groove through the main channel connecting hole. The sealing valve plate (8) is deformed by the oil pressure and opens the main oil channel. The oil enters the solenoid valve sleeve (13) and flows into the oil storage cylinder (3). The oil in the oil storage cylinder (3) enters the working cylinder (1) through the reflux hole.

6. The external electromagnetic valve damper structure according to claim 4, characterized in that: During the piston resetting process, when the end cap (11) does not block the pilot channel hole, the oil in the working cylinder (1) enters the separation cylinder (2) through the outlet hole, and then enters the tubular structure of the pilot valve seat (6) from the separation cylinder (2). The oil then reaches the sealing valve plate (12) through the pilot channel hole. The sealing valve plate (12) is pulled by the end cap (11) and deforms, opening the pilot oil channel, and the oil enters the solenoid valve sleeve (13). The oil then enters the oil storage cylinder (3) and then flows into the working cylinder (1) through the reflux hole.

7. The external electromagnetic valve damper structure according to claim 3, characterized in that: The diameter of the main channel communication hole is 2.2 mm.

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