Electric control shock absorber external electromagnetic valve convenient to assemble

Abstract

The utility model provides a convenient-to-assemble external electromagnetic valve of an electric control shock absorber. The convenient-to-assemble external electromagnetic valve comprises a shell, a control valve core assembly and an electromagnetic driving assembly, wherein the control valve core assembly and the electromagnetic driving assembly are sequentially arranged in the shell from top to bottom; the electromagnetic driving assembly comprises an upper magnetic conductive shell, a lower magnetic conductive shell and a base; the upper magnetic conductive shell is connected with the lower magnetic conductive shell, the upper magnetic conductive shell and the lower magnetic conductive shell define an annular cavity, an annular winding framework is arranged in the annular cavity, and a coil is wound on the winding framework; the upper magnetic conductive shell is provided with a central shaft hole extending in the axis direction of the upper magnetic conductive shell, and a moving armature ejector rod is slidably connected into the central shaft hole. A containing groove is formed in the top of the base, and the lower magnetic conductive shell is connected into the containing groove; the base is inserted into the lower end of the shell, and the peripheral wall of the base is in interference fit with the inner wall of the shell. The base and the shell are assembled in an inserting mode, the base is punched into the lower end of the shell through punching equipment, the base and the shell are in interference fit, the connection sealing performance can be guaranteed, operation is easy, and the sealing performance is good.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, specifically to an external solenoid valve for an electronically controlled vibration damper that is easy to assemble. Background Technology

[0002] Electronically controlled shock absorbers are a technology related to automotive suspension systems. By operating the solenoid valves of the shock absorbers, the suspension system is electronically controlled, thereby reducing vibrations during vehicle operation and improving the vehicle's driving stability, safety, and ride comfort.

[0003] In automotive suspension systems, external solenoid valves are a crucial component of electronically controlled shock absorbers. They control the flow rate of the hydraulic fluid within the shock absorber, thereby altering its damping force and improving ride comfort. However, existing solenoid valves have a threaded connection between the electromagnetic drive assembly base and the housing, with the upper end of the base encasing the lower end of the housing, making it difficult to guarantee a proper seal. Furthermore, the environment in which solenoid valves operate often exposes them to mud and sand, allowing liquids such as mud to enter the valve through gaps in the threaded connection, causing parts to rust or become damaged, thus affecting its lifespan. Additionally, this threaded assembly makes it difficult to ensure proper tightening, further increasing assembly complexity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an external solenoid valve for an electronically controlled vibration damper that has good sealing performance and is easy to assemble.

[0005] The technical solution of this utility model is to provide an external solenoid valve for an electronically controlled vibration damper with the following structure for easy assembly: It includes a housing and a control valve core assembly and an electromagnetic drive assembly arranged sequentially from top to bottom within the housing; the electromagnetic drive assembly includes an upper magnetic shell, a lower magnetic shell, and a base arranged from top to bottom; the upper magnetic shell is connected to the lower magnetic shell and together they form an annular cavity, within which is an annular winding skeleton on which a coil is wound; the upper magnetic shell has a central shaft hole extending along its axial direction, and a moving armature push rod is slidably connected within the central shaft hole, with the coil surrounding the outer end of the moving armature push rod; the top of the base has a receiving groove, and the lower magnetic shell is connected within the receiving groove; the base is inserted into the lower end of the housing, and the outer peripheral wall of the base is interference-fitted with the inner wall of the housing.

[0006] With the above structure, the easily assembled external solenoid valve of the electronically controlled vibration damper in this invention has the following advantages compared with the prior art:

[0007] This utility model assembles the base and the shell by plugging them together. During assembly, the base is simply pressed into the lower end of the shell using a stamping device, so that the base and the shell are interference-fitted, which can ensure the sealing of the connection. It is not only simple to operate, but also has good sealing performance.

[0008] Preferably, the outer peripheral wall of the base is provided with a first annular groove, and a first sealing ring is connected in the first annular groove. The first sealing ring is interference-fitted with the inner wall of the housing. The first annular groove can prevent the first sealing ring from shifting during stamping assembly, and the first sealing ring can further ensure the sealing between the base and the housing.

[0009] Preferably, the bottom of the base is provided with an interface for connector insertion.

[0010] Preferably, the upper magnetic housing is inserted into the housing and tightly fitted to the inner wall of the housing; a second annular groove is provided on the outer peripheral wall of the magnetic housing, and a second sealing ring is connected in the second annular groove, the second sealing ring being interference-fitted with the inner wall of the housing. The second annular groove can prevent the second sealing ring from shifting during assembly, and the second sealing ring provides further assurance for the seal between the electromagnetic drive assembly and the housing, preventing mud and water from entering the control valve core assembly.

[0011] Preferably, the upper magnetic shell has a vertically downward extending connecting portion in the middle, and the central shaft hole is located inside the connecting portion and is coaxial with the connecting portion; the lower magnetic shell has a connecting hole in the middle of its bottom, and the lower end of the connecting portion is tightly fitted into the connecting hole.

[0012] Preferably, the control valve core assembly includes a sleeve, an upper valve body, a lower valve body, a floating valve body, and a valve plate assembly; the sleeve is disposed within the housing and forms a first flow channel between it and the housing; the upper and lower valve bodies are fixedly disposed within the sleeve from top to bottom, and a liquid flow chamber is formed between the upper and lower valve bodies; the upper valve body is provided with a plurality of circumferentially distributed inflow holes penetrating its upper and lower ends, and the valve plate assembly is connected to the bottom of the upper valve body for closing the inflow holes; an outflow hole is provided between the upper and lower valve bodies, radially penetrating the outer peripheral wall of the sleeve, for connecting the first flow channel and the liquid flow chamber; the floating valve body is movably connected within the liquid flow chamber, and the upper end of the floating valve body abuts against the lower end of the upper valve body; the lower end of the floating valve body is provided with a convex shaft, which passes through the central hole of the lower valve body and abuts against the moving armature push rod of the electromagnetic drive assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a cross-sectional view of the present invention along the axial direction.

[0015] Figure 3 This is a half-sectional view of the present invention.

[0016] Figure 4 This is a schematic diagram of the upper magnetic shell in this utility model.

[0017] Figure 5 This is a schematic diagram of the lower magnetic shell in this utility model.

[0018] Figure 6 This is a schematic diagram of the base structure in this utility model.

[0019] Figure 7 This is a schematic diagram of the floating valve body in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Housing; 2. Control valve core assembly; 21. Sleeve; 211. Outlet hole; 22. Upper valve body; 221. Inlet hole; 222. First annular boss; 223. Second annular boss; 23. Lower valve body; 24. Floating valve body; 241. Protruding shaft; 242. First return hole; 243. Second return hole; 25. Valve plate assembly; 26. First flow channel; 27. Liquid flow chamber; 28. Annular cavity; 29. ​​Second flow channel; 3. Electromagnetic drive assembly; 31. Upper magnetic shell; 311. Second annular groove; 312. Connecting part; 32. Lower magnetic shell; 321. Connecting hole; 33. Base; 331. Receiving groove; 332. First annular groove; 333. Interface; 34. Winding frame; 35. Coil; 36. Moving armature push rod. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figures 1-7 As shown, this utility model discloses an external solenoid valve for an electronically controlled vibration damper that is easy to assemble: it includes a housing 1 and a control valve core assembly 2 and an electromagnetic drive assembly 3 arranged sequentially from top to bottom inside the housing 1.

[0025] The electromagnetic drive assembly 3 includes an upper magnetic housing 31, a lower magnetic housing 32, and a base 33 arranged from top to bottom. The upper magnetic housing 31 is connected to the lower magnetic housing 32 and together they form an annular cavity. An annular winding frame 34 is provided inside the annular cavity, and a coil 35 is wound on the winding frame 34. The upper magnetic housing 31 has a central shaft hole extending along its axial direction, and a moving armature push rod 36 is slidably connected in the central shaft hole. The coil 35 is wrapped around the outer end of the moving armature push rod 36. The top of the base 33 has a receiving groove 331, and the lower magnetic housing 32 is connected in the receiving groove 331. The bottom of the base 33 has an interface 333 for connector insertion. The base 33 is inserted into the lower end of the housing 1, and the outer peripheral wall of the base 33 is interference-fitted with the inner wall of the housing 1.

[0026] The base 33 is made of plastic. During production, the wound coil 35, the lower magnetic shell 32, and the connector pins at the interface 333 can be placed into the mold together and then injection molded as a whole to form a small assembly.

[0027] This utility model assembles the base 33 and the housing 1 by plugging them together. During assembly, the base 33 is simply pressed into the lower end of the housing 1 by a stamping device, so that the base 33 and the housing 1 are interference fit, which can ensure the sealing of the connection. It is not only simple to operate, but also has good sealing performance.

[0028] The outer peripheral wall of the base 33 is provided with a first annular groove 332, and a first sealing ring is connected in the first annular groove 332. The first sealing ring is interference-fitted with the inner wall of the housing 1. The first annular groove 332 can prevent the first sealing ring from shifting during stamping assembly, and the first sealing ring can further ensure the sealing between the base 33 and the housing 1.

[0029] The upper magnetic housing 31 is inserted into the housing 1 and is tightly fitted to the inner wall of the housing 1. A second annular groove 311 is provided on the outer peripheral wall of the magnetic housing 31, and a second sealing ring is connected in the second annular groove 311. The second sealing ring is interference-fitted with the inner wall of the housing 1. The second annular groove 311 can prevent the second sealing ring from shifting during assembly. The second sealing ring provides further assurance for the seal between the electromagnetic drive assembly 3 and the housing 1, preventing mud and water from entering the control valve core assembly 2.

[0030] The upper magnetic shell 31 has a vertically downward extending connecting part 312 in the middle, and the central shaft hole is set in the connecting part 312 and is coaxial with the connecting part 312; the lower magnetic shell 32 has a connecting hole 321 in the middle of the bottom, and the lower end of the connecting part 312 is tightly fitted in the connecting hole 321.

[0031] The control valve core assembly 2 includes a sleeve 21, an upper valve body 22, a lower valve body 23, a floating valve body 24, and a valve plate assembly 25. The sleeve 21 is disposed inside the housing 1, and a first flow channel 26 is formed between the sleeve 21 and the housing 1. The upper valve body 22 and the lower valve body 23 are fixedly disposed inside the sleeve 21 from top to bottom, and a liquid flow chamber 27 is formed between the upper valve body 22 and the lower valve body 23. The upper valve body 22 is provided with a plurality of circumferentially distributed inflow holes 221 that penetrate its upper and lower ends. The valve plate assembly 25 is connected to the upper valve body 22. At the bottom of 2, the inlet hole 221 is closed; an outlet hole 211 is provided between the upper valve body 22 and the lower valve body 23, which is radially penetrating the outer peripheral wall of the sleeve 21, for connecting the first flow channel 26 and the liquid flow chamber 27; the floating valve body 24 is movably connected in the liquid flow chamber 27, and the upper end of the floating valve body 24 abuts against the lower end of the upper valve body 22; the lower end of the floating valve body 24 is provided with a convex shaft 241, which passes through the central hole of the lower valve body 23 and abuts against the moving armature push rod 36 of the electromagnetic drive assembly 3.

[0032] This utility model uses a stainless steel sleeve 21 to rivet the upper valve body 22 and the lower valve body 23 together, which saves material for the lower valve body 23 and reduces production costs. Since the sleeve 21 is easier to process and does not require high processing precision, it is also more convenient to assemble in the future.

[0033] like Figure 2 , Figure 3 As shown, the first annular boss 222 and the upper end face of the valve plate assembly 25 form an annular cavity, and each inflow hole 221 is connected to the annular cavity. The hydraulic oil in the inner cylinder of the electronically controlled shock absorber enters the annular cavity through the inflow hole 221. When the hydraulic oil pressure in the annular cavity increases to a certain level, a gap will be generated between the outer edge of the valve plate assembly 25 and the first annular boss 222 to allow the hydraulic oil to flow into the fluid flow chamber 27. When the pressure of the hydraulic oil in the fluid flow chamber 27 increases, it will overcome the thrust of the electromagnetic drive assembly 3, causing the upper outer edge of the floating valve body 24 to separate from the second annular boss 223, thereby opening the outflow hole 211. The hydraulic oil in the fluid flow chamber 27 flows into the outer cylinder of the electronically controlled shock absorber through the outflow hole 211 and the first flow channel 26. As the pressure of the hydraulic oil changes, the deformation of the outer edge of the valve plate assembly 25 can also change linearly, thereby making the flow rate of the hydraulic oil change linearly as well. This allows the electronically controlled shock absorber to apply a linear damping force to the vehicle's shock absorption system, improving the comfort of driving and riding in the car.

[0034] An annular cavity 28 is formed between the floating valve body 24 and the lower valve body 23. The floating valve body 24 is provided with a first return hole 242 that passes through its upper and lower ends to connect the liquid flow cavity 27 and the annular cavity 28. A second flow channel 29 is provided between the lower valve body 23 and the electromagnetic drive assembly 3. One end of the second flow channel 29 is connected to the first flow channel 26. A second return hole 243 is provided on the cam shaft 241. The upper end of the second return hole 243 is radially bent and connected to the annular cavity 28. The lower end of the second return hole 243 is connected to the second flow channel 29. The output end of the electromagnetic drive assembly 3 abuts against the lower end of the cam shaft 241 to open or close the second return hole 243.

[0035] When the hydraulic oil in the outer cylinder of the electronically controlled shock absorber needs to flow back to the inner cylinder, the moving armature push rod 36 of the electromagnetic drive assembly 3 opens the second return hole 243. The hydraulic oil in the outer cylinder flows sequentially through the first flow channel 26, the second flow channel 29, the second return hole 243, the annular cavity 28, the first return hole 242, the fluid flow cavity 27, the gap between the valve plate assembly 25 and the first annular boss 222, and the inflow hole 221 into the inner cylinder of the electronically controlled shock absorber. During this process, the pressure in the annular cavity 28 increases, thereby pushing the floating valve body 24 upward, so that its upper end abuts against the second annular boss 223, thereby closing the outflow hole 211.

[0036] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An externally mounted solenoid valve of an electronically controlled shock absorber which is easy to assemble, comprising a housing (1) and a control valve core assembly (2) and a solenoid drive assembly (3) which are sequentially arranged in the housing (1) from top to bottom; characterized in that: The electromagnetic drive assembly (3) includes an upper magnetic housing (31), a lower magnetic housing (32), and a base (33) arranged from top to bottom. The upper magnetic housing (31) is connected to the lower magnetic housing (32) and together they form an annular cavity. An annular winding skeleton (34) is provided inside the annular cavity, and a coil (35) is wound on the winding skeleton (34). The upper magnetic housing (31) has a central shaft hole extending along its axial direction. A moving armature push rod (36) is slidably connected in the central shaft hole, and the coil (35) surrounds the outer end of the moving armature push rod (36). The top of the base (33) has a receiving groove (331), and the lower magnetic housing (32) is connected in the receiving groove (331). The base (33) is inserted into the lower end of the housing (1), and the outer peripheral wall of the base (33) is interference-fitted with the inner wall of the housing (1).

2. The externally mounted solenoid valve of the electronically controlled shock absorber for easy assembly according to claim 1, characterized in that: The outer peripheral wall of the base (33) is provided with a first annular groove (332), and a first sealing ring is connected in the first annular groove (332). The first sealing ring is interference-fitted with the inner wall of the shell (1).

3. The externally mounted solenoid valve of the electronically controlled shock absorber for easy assembly according to claim 1, characterized in that: The bottom of the base (33) is provided with an interface (333) for connector insertion.

4. The externally mounted solenoid valve of the electronically controlled shock absorber for easy assembly according to claim 1, characterized in that: The upper magnetic shell (31) is inserted into the shell (1) and is tightly fitted with the inner wall of the shell (1); the outer peripheral wall of the magnetic shell (31) is provided with a second annular groove (311), and a second sealing ring is connected in the second annular groove (311), and the second sealing ring is interference-fitted with the inner wall of the shell (1).

5. The externally mounted solenoid valve of the electronically controlled shock absorber for easy assembly according to claim 1, characterized in that: The upper magnetic shell (31) has a vertically downward extending connecting part (312) in the middle, and the central shaft hole is set in the connecting part (312) and is coaxial with the connecting part (312); the lower magnetic shell (32) has a connecting hole (321) in the middle of the bottom, and the lower end of the connecting part (312) is tightly fitted in the connecting hole (321).

6. The externally mounted solenoid valve of the electronically controlled shock absorber for easy assembly according to claim 1, characterized in that: The control valve core assembly (2) includes a sleeve (21), an upper valve body (22), a lower valve body (23), a floating valve body (24), and a valve plate assembly (25); the sleeve (21) is disposed inside the housing (1), and a first flow channel (26) is formed between the sleeve (21) and the housing (1); the upper valve body (22) and the lower valve body (23) are fixedly disposed inside the sleeve (21) from top to bottom, and a liquid flow cavity (27) is formed between the upper valve body (22) and the lower valve body (23); the upper valve body (22) is provided with a plurality of circumferentially distributed inflow holes (221) that penetrate its upper and lower ends, and the valve plate assembly (25) is connected to the upper valve body (21). The bottom of 22) is used to close the inflow hole (221); the upper valve body (22) and the lower valve body (23) are provided with an outflow hole (211) that radially penetrates the outer peripheral wall of the sleeve (21) for connecting the first flow channel (26) and the liquid flow chamber (27); the floating valve body (24) is movably connected in the liquid flow chamber (27), and the upper end of the floating valve body (24) abuts against the lower end of the upper valve body (22); the lower end of the floating valve body (24) is provided with a convex shaft (241), the convex shaft (241) passes through the center hole of the lower valve body (23) and abuts against the moving armature push rod (36) of the electromagnetic drive assembly (3).

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