A kind of external electromagnetic valve shock absorber structure

Abstract

The application 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 is sleeved on the outer 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, a flow-through hole is formed in the working cylinder, the flow-through hole is connected with the oil storage cylinder, a liquid outlet hole is formed in the working cylinder, the liquid outlet hole is connected with the separation oil cylinder, a piston is slidably arranged in the working cylinder, and the flow-through hole and the liquid outlet hole are located on the two sides of the piston, respectively.The external electromagnetic valve shock absorber structure is provided, the original first-generation pilot valve seat, a joint, an oil passage shaft, a first-generation backflow valve seat and a valve sheet are replaced by the provided pilot valve seat and the backflow valve seat, the internal structure of the electromagnetic valve is simplified, the height of the electromagnetic valve is reduced, the electromagnetic valve can adapt to smaller installation space, the application range is wide, the number of parts is reduced, the assembly process is simplified, and the production time is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrically controlled shock absorbers, in particular to a shock absorber structure with an external electromagnetic valve. BACKGROUND

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

[0003] The existing external electromagnetic valve mechanism is usually composed of a joint, a pilot valve seat, a sealing valve piece, an oil passage shaft backflow valve seat, a plugging valve piece and a coil inside, and the height of the entire electromagnetic valve is high, which cannot meet the layout needs of customers. SUMMARY

[0004] Based on the technical problems in the background art, the present application provides a shock absorber structure with an external electromagnetic valve.

[0005] The shock absorber structure with an external electromagnetic valve provided by the present application 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 is sleeved on the outer 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, a flow-through hole is formed through the working cylinder, the flow-through hole communicates with the oil storage cylinder, a liquid outlet hole is also formed in the working cylinder, the liquid outlet hole communicates with the separation oil cylinder, a piston is slidably arranged in the working cylinder, and the flow-through hole and the liquid outlet hole are located on the two sides of the piston, respectively.

[0006] The outer periphery of the oil storage cylinder is fixedly provided with an electromagnetic valve shell, a relatively closed cavity is formed between the electromagnetic valve shell and the oil storage cylinder, the cavity is communicated with the oil storage cylinder, the outer periphery of the separation oil cylinder is fixedly provided with a pilot valve seat, 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 shell, one end of the pilot valve seat away from the separation oil cylinder is fixedly connected with a backflow valve seat, a main oil passage is arranged between the pilot valve seat and the backflow valve seat, and a blocking valve plate capable of blocking the main oil passage is arranged between the pilot valve seat and the backflow valve seat.

[0007] One end of the electromagnetic valve shell away from the oil storage cylinder is provided with a coil, a straight rod is arranged in the coil, the coil is used for driving the straight rod to slide, an end portion of the straight rod is fixedly provided with an end cap, the end cap can block a middle opening of the backflow valve seat, a pilot oil passage is formed between the backflow valve seat and a 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.

[0008] A pressure regulating chamber is arranged between the blocking valve plate and the backflow valve seat, and a throttling hole is formed in the inner wall of the backflow valve seat and communicated with the pressure regulating chamber.

[0009] Preferably, the electromagnetic valve shell comprises an electromagnetic valve sleeve, an electromagnetic valve outer cylinder, an electromagnetic valve cover and a safety valve assembly; one end of the electromagnetic valve sleeve is fixedly connected with the outer periphery of the oil storage cylinder, the electromagnetic valve outer cylinder is arranged at one end of the electromagnetic valve sleeve away from the oil storage cylinder, the electromagnetic valve cover is threadedly sleeved at one end of the electromagnetic valve sleeve away from the oil storage cylinder, the safety valve assembly is fixedly arranged in the electromagnetic valve outer cylinder, and a sliding hole matched with the straight rod is formed in the safety valve assembly.

[0010] Preferably, the pilot valve seat comprises a tubular structure and a disc-shaped structure, the disc-shaped structure is sleeved on the middle segment of the tubular structure, one end of the tubular structure is fixedly connected with the separation oil cylinder, and the other end of the tubular structure is threadedly connected with the backflow valve seat.

[0011] A first annular groove is formed in the side of the disc-shaped structure close to the backflow valve seat, and a plurality of main passage communication holes communicated with the first annular groove are circumferentially formed in the inner wall of the tubular structure.

[0012] Preferably, the backflow valve seat comprises a cylindrical structure, a second annular groove is formed in the side of the backflow valve seat close to the pilot valve seat, a pilot passage hole is formed in the center position of the backflow valve seat, the threaded segment of the tubular structure of the pilot valve seat is threadedly inserted into the pilot passage hole, and the two ends of the throttling hole are respectively arranged at the inner wall of the pilot passage hole and the inner wall of the second annular groove.

[0013] Preferably, during the piston reset process, when the end cap blocks the pilot passage 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 passage communication hole. The sealing valve piece is deformed under the action of oil pressure and opens the main oil passage, the oil enters the electromagnetic valve sleeve and flows into the oil storage cylinder, and the oil in the oil storage cylinder enters the working cylinder through the backflow hole.

[0014] Preferably, during the piston reset process, when the end cap blocks the pilot passage 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 passage communication hole. The sealing valve piece is deformed under the action of oil pressure and opens the main oil passage, the oil enters the electromagnetic valve sleeve and flows into the oil storage cylinder, and the oil in the oil storage cylinder enters the working cylinder through the backflow hole.

[0015] Preferably, the diameter of the main passage communication hole is 2.2mm.

[0016] The external electromagnetic valve shock absorber structure provided by the application has the following beneficial effects: the original first generation pilot valve seat, joint, oil passage shaft, first generation backflow valve seat and valve piece are replaced by the pilot valve seat and backflow valve seat, the internal structure of the electromagnetic valve is simplified, the height of the electromagnetic valve is reduced, smaller installation space can be adapted, the application range is wide, the number of parts is reduced, the assembly process is simplified, and the production time is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The electromagnetic valve part structure sectional view of the external electromagnetic valve shock absorber structure provided by the application;

[0018] Figure 2 The overall structure sectional view of the external electromagnetic valve shock absorber structure provided by the application;

[0019] Figure 3 The IP assembly sectional view of the external electromagnetic valve shock absorber structure provided by the application;

[0020] Figure 4 The structure schematic view of the pilot valve seat in the external electromagnetic valve shock absorber structure provided by the application;

[0021] Figure 5 The side sectional view of the pilot valve seat in the external electromagnetic valve shock absorber structure provided by the application;

[0022] Figure 6 The top view of the pilot valve seat in the external electromagnetic valve shock absorber structure provided by the application;

[0023] Figure 7A structure schematic view of a backflow valve seat in a structure of an external electromagnetic valve shock absorber according to the present application is provided;

[0024] Figure 8 A side sectional view of the backflow valve seat in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0025] Figure 9 A structure schematic view of an elastic member in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0026] Figure 10 A sectional view of a pilot valve assembly in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0027] Figure 11 A sectional view of an IP assembly in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0028] Figure 12 A sectional view of a pilot valve assembly in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0029] Figure 13 A top view and a side sectional view of a joint in the structure of the external electromagnetic valve shock absorber according to the present application are provided;

[0030] Figure 14 A side sectional view and a top view of a first generation pilot valve seat in the structure of the external electromagnetic valve shock absorber according to the present application are provided;

[0031] Figure 15 A side sectional view and a top view of an oil passage shaft in the structure of the external electromagnetic valve shock absorber according to the present application are provided;

[0032] Figure 16 A top view and a side sectional view of a first generation backflow valve seat in the structure of the external electromagnetic valve shock absorber according to the present application are provided;

[0033] Figure 17 A structure schematic view of another pilot valve seat in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0034] Figure 18 A structure schematic view of a side view of an electromagnetic valve outer cylinder in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0035] Figure 19 A structure schematic view of an end view of the electromagnetic valve outer cylinder in the structure of the external electromagnetic valve shock absorber according to the present application is provided;

[0036] Figure 20 A structure schematic view of an electromagnetic valve cover in the structure of the external electromagnetic valve shock absorber according to the present application is provided.

[0037] Figure: 1, working cylinder; 2, separation oil cylinder; 3, oil storage cylinder; 4, safety valve assembly; 5, throttle hole; 6, pilot valve seat; 7, backflow valve seat; 8, blocking valve piece; 9, coil; 10, straight rod; 11, end cap; 12, sealing valve piece; 13, electromagnetic valve sleeve; 14, electromagnetic valve outer cylinder; 15, electromagnetic valve cover; 16, joint; 17, first generation pilot valve seat; 18, oil passage shaft; 19, first generation backflow valve seat; 20, elastic member; 21, groove. DETAILED DESCRIPTION

[0038] REFERENCE Figures 1-20 The present application proposes a kind of external electromagnetic valve shock absorber structure, including working cylinder 1, separation oil cylinder 2 and oil storage cylinder 3, separation oil cylinder 2 is located in oil storage cylinder 3, separation oil cylinder 2 is sleeved in the outer periphery of working cylinder 1, the two ends of working cylinder 1 are respectively fixedly connected with the inner wall of the two ends of oil storage cylinder 3, the two ends of working cylinder 1 are respectively guiding seat and support seat, working cylinder 1 is fixedly connected with guiding seat, working cylinder 1 is fixedly connected with support seat, through-flow hole is set on working cylinder 1, through-flow hole is communicated with oil storage cylinder 3, working cylinder 1 is also provided with liquid outlet hole, liquid outlet hole is communicated with separation oil cylinder 2, piston is slidably arranged in working cylinder 1, piston and one end of telescopic rod are fixedly connected, one end of telescopic rod extends to the outside of working cylinder 1 by penetrating the end of working cylinder 1, through-flow hole and liquid outlet hole are respectively located on the two sides of piston;The installation connection mode of working cylinder 1, separation oil cylinder 2 and oil storage cylinder 3 is prior art, and it is not introduced redundantly.

[0039] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown in the middle of the oil tank 3 of the outer fixed installation of solenoid valve shell, solenoid valve shell and oil tank 3 between the formation of a relatively closed cavity, the cavity with oil tank 3 communication, separation of the outer fixed installation of oil cylinder 2 pilot valve seat 6, pilot valve seat 6 and separation of the oil cylinder 2, pilot valve seat 6 through the oil tank 3 and extends to the solenoid valve shell, pilot valve seat 6 away from the separation of the oil cylinder 2 one end fixed connection has backflow valve seat 7, pilot valve seat 6 and backflow valve seat 7 between the main oil passage is provided, pilot valve seat 6 and backflow valve seat 7 between the installation can block the main oil passage of the block valve piece 8, block valve piece 8 includes pilot valve block valve piece, pilot valve valve piece and pilot valve sealing valve piece, etc., block valve piece 8 is prior art, and no redundant introduction is made; Pilot valve seat 6 includes tubular structure and disc structure, disc structure is sleeved in the middle segment of tubular structure, one end of tubular structure is fixedly connected with separation of the oil cylinder 2, the other end of tubular structure is threadedly connected with backflow valve seat 7; The side of disc structure close to backflow valve seat 7 is provided with a number one annular groove, the inner wall of tubular structure is provided with a plurality of main channel communication holes which are communicated with the number one annular groove, the diameter of main channel communication hole is 2.2mm; The end of solenoid valve shell away from oil tank 3 is provided with coil 9, straight rod 10 is installed in coil 9, coil 9 is used for driving straight rod 10 to slide, end cap 11 is fixedly installed at the end of straight rod 10, end cap 11 can block the middle hole of backflow valve seat 7, backflow valve seat 7 and safety valve assembly 4 form pilot oil passage, sealing valve piece 12 is sleeved on straight rod 10, elastic element 20 is connected between end cap 11 and sealing valve piece 12, sealing valve piece 12 includes safety valve washer, pilot valve inner block valve piece, safety valve valve piece, safety valve special washer, etc., which is prior art, and no redundant introduction is made; Block valve piece 8 and backflow valve seat 7 are provided with pressure regulating chamber, throttle hole 5 (throttle hole 5 can also be provided with groove 21 on the threaded segment of tubular structure of pilot valve seat 6 instead, as shown in Figure 17 The two oil paths of the shock absorber are shown in Figure 10 As shown in the middle of the shock absorber recovery and compression stroke, the oil in the working cylinder 1 is squeezed into the separation of the oil cylinder 2, the inner hole of the separation of the oil cylinder 2 and the O ring of the pilot valve seat 6 is in interference fit, forming a seal, the oil in the separation of the oil cylinder 2 is introduced into the solenoid valve; The internal oil path of solenoid valve is divided into two parts, the first oil path is the main oil path, see Figure 10, the oil liquid circulation mode is that: the inside of the pilot valve seat 6 is designed with a 6-Φ2.2 main passage communication hole, the oil liquid passes through the main passage communication hole, enters the sealing 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, the oil liquid flows back to the oil storage cylinder 3, and the pressure is reduced; in the piston reset process, when the end cap 11 blocks the pilot passage hole, the oil liquid in the working cylinder 1 enters the separation oil cylinder 2 through the liquid outlet hole, the oil liquid enters the tubular structure from the separation oil cylinder 2, the oil liquid enters the No. 1 annular groove through the main passage communication hole, the blocking valve plate 8 is deformed under the action of oil pressure and opens the main oil passage, the oil liquid enters the electromagnetic valve sleeve 13 and flows into the oil storage cylinder 3, and the oil liquid in the oil storage cylinder 3 enters the working cylinder 1 through the backflow hole.

[0040] The second oil passage is called a pilot oil passage, the oil liquid passes through the main flow hole of the pilot valve seat 6, part of the oil liquid flows into the safety valve chamber, and part of the oil liquid returns to the upper cavity of the pilot valve sealing valve plate through the oil passage shaft throttling hole 5 (see Figure 10 ) (at this time, the pressure on the upper and lower sides of the blocking valve plate 8 is the same, and the blocking valve plate 8 is not easy to deform); the oil liquid passes through the hole on the sealing valve plate 12 to reach the electromagnetic valve shell, the backflow valve seat 7 includes a cylindrical structure, a No. 2 annular groove is formed on the side close to the pilot valve seat 6 of the backflow valve seat 7, and a pilot passage hole is formed at the center position of the backflow valve seat 7; in the piston reset process, when the end cap 11 does not block the pilot passage hole, the oil liquid in the working cylinder 1 enters the separation oil cylinder 2 through the liquid outlet hole, the oil liquid enters the tubular structure of the pilot valve seat 6 from the separation oil cylinder 2, the oil liquid reaches the sealing valve plate 12 through the pilot passage hole, the sealing valve plate 12 is deformed under the traction of the end cap 11 and opens the pilot oil passage, the oil liquid enters the electromagnetic valve sleeve 13, and the oil liquid enters the oil storage cylinder 3 and then flows into the working cylinder 1 through the backflow hole.

[0041] The working principle is that the damping force control principle of the electric control shock absorber is that the size of the electromagnetic force is adjusted by adjusting the current flowing into the coil 9, the electromagnetic force drives the end cap 11, the end cap 11 contacts the backflow valve seat 7 and blocks the hole of the backflow valve seat 7, so as to change the pressure of the pilot oil passage, when the input current is small, the pressure of the pilot oil passage is small, the pressure difference between the main oil passage and the pilot oil passage 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 passage is large, the pressure difference between the main oil passage and the pilot oil passage is small, the blocking valve plate 8 is difficult to open, and the damping force is large.

[0042] As Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16As shown in the prior art electromagnetic valve shock absorber, the inside of the electromagnetic valve shell is different from the present application in that one end of the joint 16 is directly communicated with the separation cylinder 2, the other end of the joint 16 is communicated with a first pilot valve seat 17, the first pilot valve seat 17 and a first return valve seat 19 are communicated through an oil passage shaft 18, and a valve plate is further arranged between the oil passage shaft 18 and the first return valve seat 19, so that the structural height of the whole electromagnetic valve is too high to meet the actual needs. Therefore, the present application is improved, and the details are as follows:

[0043] As shown in the prior art electromagnetic valve shock absorber, the inside of the electromagnetic valve shell is different from the present application in that one end of the joint 16 is directly communicated with the separation cylinder 2, the other end of the joint 16 is communicated with a first pilot valve seat 17, the first pilot valve seat 17 and a first return valve seat 19 are communicated through an oil passage shaft 18, and a valve plate is further arranged between the oil passage shaft 18 and the first return valve seat 19, so that the structural height of the whole electromagnetic valve is too high to meet the actual needs. Therefore, the present application is improved, and the details are as follows: Figure 1 Figure 2 As shown in the prior art electromagnetic valve shock absorber, the inside of the electromagnetic valve shell is different from the present application in that one end of the joint 16 is directly communicated with the separation cylinder 2, the other end of the joint 16 is communicated with a first pilot valve seat 17, the first pilot valve seat 17 and a first return valve seat 19 are communicated through an oil passage shaft 18, and a valve plate is further arranged between the oil passage shaft 18 and the first return valve seat 19, so that the structural height of the whole electromagnetic valve is too high to meet the actual needs. Therefore, the present application is improved, and the details are as follows:

[0044] 1. The flow hole diameter of the oil storage cylinder 3 is increased (Φ20→Φ31), which provides space for the valve body sinking and structural optimization, and the original cylinder wall height is cancelled;

[0045] 2. The electromagnetic valve sleeve 13 is newly designed, the side wall thickness is increased, and a limiting boss is added; the lower support surface is cancelled, the valve body contribution height is reduced, and the overall height of the electromagnetic valve is reduced;

[0046] 3. The pilot valve seat 6 is newly designed, the material is changed from powder metallurgy to precision machining, and the size precision is higher; the upper end is connected with the return valve seat 7 through threads, and the overall height is reduced;

[0047] 4. The return valve seat 7 is newly designed, the valve seat is machined with high precision, the size precision is higher, the material remains unchanged, the valve seat is fixed by the electromagnetic valve sleeve 13, and the overall height is reduced;

[0048] 5. The oil passage shaft 18 is cancelled, combined with the pilot valve seat 6 as one part, the connection mode is changed from the original press fitting to threaded connection (same as the compression valve mode), the overall height is reduced; the details are as follows:

[0049] The original electromagnetic valve cover (metal) is cancelled, a plastic cover is added, the functions of the two covers are different, the original electromagnetic valve cover (metal) functions to apply torque, and the present cover functions to protect the riveting position of the electromagnetic valve; the tightening process is cancelled and replaced by riveting, the snap spring is cancelled; the blocking valve plate and valve plate in the safety valve are cancelled Figure 11 ​The position circled at middle A) is positioned in circumferential direction by using edge groove limiting, and a ring boss is added outside the electromagnetic valve outer cylinder 14 for riveting; the height of the coil 9 is lowered to simplify the structure.

[0050] The assembly process is as follows:

[0051] 1. Assemble the O-ring to the pilot valve seat 6;

[0052] 2. Assemble the blocking valve piece 8 (pilot valve piece, pilot valve sealing piece, pilot valve adjusting washer, pilot valve blocking piece) to the tubular structure of the pilot valve seat 6;

[0053] 3. Assemble the backflow valve seat 7, the pilot valve seat 6 and the intermediate valve piece in the middle, and tighten with a certain torque;

[0054] 4. Assemble the above parts and the safety valve assembly to form the pilot valve assembly, Figure 10 which is the pilot valve assembly;

[0055] 5. Assemble the pilot valve assembly and the electromagnetic valve outer cylinder 14, assemble the O-ring to form the IP assembly, Figure 3 which is the IP assembly;

[0056] 6. Assemble the IP assembly into the electromagnetic valve sleeve 13, use the tool to roll the edge of the electromagnetic valve sleeve 13, and complete the press fitting;

[0057] 7. Finally, press fit the electromagnetic valve cover 15 and the coil 9.

[0058] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An external solenoid valve damper structure, characterized by, Including work cylinder (1), separate oil cylinder (2) and oil storage cylinder (3), the separate oil cylinder (2) is located in oil storage cylinder (3), the separate oil cylinder (2) is sleeved on the outer periphery of work cylinder (1), the both ends of work cylinder (1) are fixedly connected with the inner wall of the both ends of oil storage cylinder (3) respectively, the flow-through hole is opened on work cylinder (1), the flow-through hole is communicated with oil storage cylinder (3), work cylinder (1) is also provided with liquid outlet hole, the liquid outlet hole is communicated with separate oil cylinder (2), the piston is slidably arranged in work cylinder (1), the flow-through hole and liquid outlet hole are located at the both sides of the piston respectively; The outer periphery of the oil storage cylinder (3) is fixedly installed with an electromagnetic valve housing, a relatively closed cavity is formed between the electromagnetic valve housing and the oil storage cylinder (3), the cavity is communicated with the oil storage cylinder (3), the outer periphery of the separate oil cylinder (2) is fixedly installed with a pilot valve seat (6), the pilot valve seat (6) is communicated with the separate oil cylinder (2), the pilot valve seat (6) penetrates the oil storage cylinder (3) and extends into the electromagnetic valve housing, the one end of the pilot valve seat (6) away from the separate oil cylinder (2) is fixedly connected with a backflow valve seat (7), a main oil passage is arranged between the pilot valve seat (6) and the backflow valve seat (7), a blocking valve plate (8) capable of blocking the main oil passage is installed between the pilot valve seat (6) and the backflow valve seat (7); The one end of the electromagnetic valve housing away from the oil storage cylinder (3) is installed with a coil (9), a straight rod (10) is installed in the coil (9), the coil (9) is used to drive the straight rod (10) to slide, the end of the straight rod (10) is fixedly installed with an end cap (11), the end cap (11) can block the middle opening of the backflow valve seat (7), a pilot oil passage is formed between the backflow valve seat (7) and a safety valve assembly (4), the end cap (11) is sleeved with a sealing valve plate (12), an elastic member (20) is further connected between the end cap (11) and the sealing valve plate (12); The blocking valve plate (8) and the backflow valve seat (7) are provided with a pressure regulating chamber, the inner wall of the backflow valve seat (7) is provided with a throttling hole (5) communicated with the pressure regulating chamber.

2. The structure of an external electromagnetic valve shock absorber according to claim 1, wherein The electromagnetic valve housing includes an electromagnetic valve sleeve (13), an electromagnetic valve outer cylinder (14), an electromagnetic valve cover (15) and a safety valve assembly (4); one end of the electromagnetic valve sleeve (13) is fixedly connected with the outer periphery of the oil storage cylinder (3), the electromagnetic valve outer cylinder (14) is installed at the one end of the electromagnetic valve sleeve (13) away from the oil storage cylinder (3), the electromagnetic valve cover (15) is threadedly sleeved at the one end of the electromagnetic valve sleeve (13) away from the oil storage cylinder (3), the safety valve assembly (4) is fixedly installed in the electromagnetic valve outer cylinder (14), and a sliding hole matched with the straight rod (10) is formed in the safety valve assembly (4).

3. The structure of an external electromagnetic valve shock absorber according to claim 1, wherein The pilot valve seat (6) includes a tubular structure and a disc-shaped structure, the disc-shaped structure is sleeved on the middle segment of the tubular structure, one end of the tubular structure is fixedly connected with the separate oil cylinder (2), and the other end of the tubular structure is threadedly connected with the backflow valve seat (7). The disc-shaped structure is provided with a first annular groove on one side close to the return valve seat (7), and the inner wall of the tubular structure is provided with a plurality of main channel communication holes in communication with the first annular groove.

4. The structure of an external electromagnetic valve shock absorber according to claim 3, wherein The return valve seat (7) comprises a cylindrical structure, is provided with a second annular groove on one side close to the pilot valve seat (6), and is provided with a pilot channel hole at the center position, the threaded section of the tubular structure of the pilot valve seat (6) is screwed into the pilot channel hole, and the throttle hole (5) is respectively provided at the inner wall of the pilot channel hole and the inner wall of the second annular groove.

5. The structure of an external electromagnetic valve shock absorber according to claim 4, wherein During the piston reset process, when the end cap (11) blocks the pilot channel hole, the oil in the working cylinder (1) enters the separation oil cylinder (2) through the liquid outlet hole, the oil enters the tubular structure from the separation oil cylinder (2), and then enters the first annular groove through the main channel communication hole, the blocking valve plate (8) is deformed under the action of oil pressure and opens the main oil passage, the oil enters the electromagnetic valve sleeve (13) and flows into the oil storage cylinder (3), and the oil in the oil storage cylinder (3) enters the working cylinder (1) through the flow hole.

6. The structure of an external electromagnetic valve shock absorber according to claim 4, wherein During the piston reset process, when the end cap (11) does not block the pilot channel hole, the oil in the working cylinder (1) enters the separation oil cylinder (2) through the liquid outlet hole, and then enters the tubular structure of the pilot valve seat (6) from the separation oil cylinder (2), and then reaches the sealing valve plate (12) through the pilot channel hole, the sealing valve plate (12) is deformed under the action of the end cap (11) and opens the pilot oil passage, the oil enters the electromagnetic valve sleeve (13), and then enters the oil storage cylinder (3), and then flows into the working cylinder (1) through the flow hole.

7. The structure of an external electromagnetic valve shock absorber according to claim 3, wherein The diameter of the main channel communication hole is 2.2 mm.

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