Electrically controlled shock absorber external electromagnetic valve

Abstract

This utility model provides an external solenoid valve for an electronically controlled vibration damper: it includes a housing, a control valve core assembly, and an electromagnetic drive assembly; the control valve core assembly includes an upper valve body, a lower valve body, a floating valve body, and a valve plate assembly; the upper and lower valve bodies are arranged from top to bottom within the housing, and a fluid flow chamber is formed between the upper and lower valve bodies; the valve plate assembly is connected to the bottom of the upper valve body, and the floating valve body is movably connected within the fluid flow chamber; an annular baffle is provided at the top of the housing, the upper end of the upper valve body abuts against the annular baffle, and the electromagnetic drive assembly is interference-fitted to the lower end of the housing, abutting against the lower end of the lower valve body, and causing the upper end of the lower valve body to abut against the upper valve body; this utility model provides an annular baffle at the top of the housing, which cooperates with the electromagnetic drive assembly at the lower end of the housing to press the upper and lower valve bodies together, eliminating the need for riveting, saving material usage for the lower valve body, reducing assembly steps, lowering costs, and making assembly simpler and more convenient.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, specifically to an external electromagnetic valve for an electronically controlled vibration damper. 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 hydraulic fluid between the inner and outer cylinders of the shock absorber, thereby altering the damping force and improving ride comfort. Existing solenoid valves have a relatively complex structure. The upper valve body and floating valve body are both assembled within the lower valve body, which needs to enclose and rivet the upper valve body. Due to the high material and machining precision requirements of the upper valve body, this design results in high manufacturing costs for the solenoid valve. Furthermore, ensuring the machining precision of the main valve body during subsequent assembly significantly increases the assembly difficulty. To address this, sleeves are added to the upper and lower valve bodies to connect them. While this method reduces the material usage of the lower valve body, the sleeve connection is cumbersome and impacts assembly efficiency. 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 is simple in structure, low in cost, and has high assembly efficiency.

[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: 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 control valve core assembly includes an upper valve body, a lower valve body, a floating valve body, and a valve plate assembly; the upper and lower valve bodies are arranged from top to bottom within the housing, and a fluid flow chamber is formed between the upper and lower valve bodies; the valve plate assembly is connected to the bottom of the upper valve body, and the floating valve body is movably connected within the fluid flow chamber; an annular baffle is provided at the top of the housing, the upper end of the upper valve body abuts against the annular baffle, and the electromagnetic drive assembly is interference-fitted to the lower end of the housing, with the upper end of the electromagnetic drive assembly abutting against the lower end of the lower valve body, and the upper end of the lower valve body abutting against the upper valve body.

[0006] Preferably, the housing is provided with a positioning protrusion ring, and the upper outer edge of the electromagnetic drive assembly abuts against the positioning protrusion ring.

[0007] Preferably, the upper valve body has an upwardly extending annular portion at the top center, which passes through the central hole of the annular baffle and is connected to the inner cylinder of the shock absorber; the annular portion has several circumferentially distributed inflow holes that penetrate the upper and lower ends of the upper valve body, and the bottom of the upper valve body has a first annular boss located outside the inflow holes. The valve plate assembly is connected to the bottom center of the upper valve body and abuts against the first annular boss to open or close the inflow holes.

[0008] Preferably, a first flow channel is formed between the upper valve body, the lower valve body and the inner wall of the housing, and a plurality of through holes communicating with the first flow channel are evenly distributed on the annular baffle; the outer edge of the upper valve body is provided with a plurality of outflow holes that are evenly spaced in the circumferential direction and communicate with the liquid flow cavity, and the outflow holes are connected to the first flow channel.

[0009] Preferably, the bottom of the upper valve body is provided with a second annular boss located outside the first annular boss, and the upper outer edge of the floating valve body abuts against the second annular boss.

[0010] Preferably, a reflux chamber is formed between the floating valve body and the lower valve body. The floating valve body is provided with a first reflux hole that passes through its upper and lower ends, and the first reflux hole connects the liquid flow chamber and the reflux chamber. The lower end of the floating valve body is provided with a convex shaft that extends downward and passes through the central hole of the lower valve body. The convex shaft is provided with a second reflux hole that communicates with the reflux chamber. The output end of the electromagnetic drive assembly abuts against the lower end of the convex shaft to open or close the second reflux hole. A second flow channel is provided between the lower valve body and the electromagnetic drive assembly. One end of the second flow channel is connected to the first flow channel, and the other end is connected to the second reflux hole.

[0011] Preferably, the electromagnetic drive assembly includes a magnetically conductive shell and a base arranged from top to bottom. The top of the magnetically conductive shell abuts against the bottom of the lower valve body, and its outer edge abuts against a positioning protrusion ring. The base is tightly fitted to the bottom of the housing and abuts against the magnetically conductive shell. The magnetically conductive shell has a central shaft hole, and a movable armature push rod is slidably connected in the central shaft hole. An annular receiving cavity is provided between the magnetically conductive shell and the base, and a coil group surrounding the movable armature push rod is provided in the receiving cavity.

[0012] With the above structure, the external solenoid valve of the electronically controlled vibration damper in this invention has the following advantages compared with the prior art: 1. This utility model has an annular baffle on the top of the housing, which cooperates with the electromagnetic drive assembly at the lower end of the housing to squeeze the upper valve body and the lower valve body together without riveting. This saves material for the lower valve body and reduces assembly steps, thereby reducing costs and making assembly simpler and more convenient.

[0013] 2. The positioning protrusion inside the housing can determine whether the electromagnetic drive assembly is assembled in place, thereby ensuring that the upper end of the electromagnetic drive assembly can squeeze the lower valve body, forcing it to abut against the upper valve body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a half-sectional view of the present invention.

[0016] Figure 3 This is a half-sectional view of the present invention from another viewing direction.

[0017] Figure 4 This is a schematic diagram of the shell structure in this utility model.

[0018] Figure 5 This is an exploded view of the control valve core assembly in this utility model.

[0019] Figure 6 This is a schematic diagram of the electromagnetic drive assembly in this utility model.

[0020] Explanation of reference numerals in the attached figures: 1. Housing; 11. Annular baffle; 111. Through hole; 12. Positioning protrusion ring; 2. Control valve core assembly; 21. Upper valve body; 211. Annular part; 212. Inlet hole; 213. Outlet hole; 214. First annular boss; 215. Second annular boss; 22. Lower valve body; 23. Floating valve body; 231. Protruding shaft; 232. First return hole; 233. Second return hole; 24. Valve plate assembly; 25. Liquid flow chamber; 26. First flow channel; 27. Second flow channel; 3. Electromagnetic drive assembly; 31. Magnetic shell; 311. Receptacle; 32. Base; 33. Moving armature push rod; 34. Coil assembly. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] 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.

[0023] like Figures 1-6 As shown, this utility model discloses an external solenoid valve for an electronically controlled vibration damper: including a housing 1 and a control valve core assembly 2 and an electromagnetic drive assembly 3 arranged sequentially from top to bottom within the housing 1.

[0024] The control valve core assembly 2 includes an upper valve body 21, a lower valve body 22, a floating valve body 23, and a valve plate assembly 24. The upper valve body 21 and the lower valve body 22 are arranged from top to bottom in the housing 1, and a liquid flow chamber 25 is formed between the upper valve body 21 and the lower valve body 22. The valve plate assembly 24 is connected to the bottom of the upper valve body 22, and the floating valve body 23 is movably connected in the liquid flow chamber 25.

[0025] The top of the housing 1 is provided with an annular baffle 11, the upper end of the upper valve body 21 abuts against the annular baffle 11, the electromagnetic drive assembly 3 is interference-connected to the lower end of the housing 1, and the upper end of the electromagnetic drive assembly 3 abuts against the lower end of the lower valve body 22, and the upper end of the lower valve body 22 abuts against the upper valve body 21.

[0026] This utility model provides an annular baffle 11 at the top of the housing 1, which cooperates with the electromagnetic drive assembly 3 at the lower end of the housing 1 to press the upper valve body 21 and the lower valve body 22 together without riveting. This saves material usage for the lower valve body 22 and reduces assembly steps, thereby reducing costs and making assembly simpler and more convenient.

[0027] The housing 1 is provided with a positioning protrusion ring 12, and the upper outer edge of the electromagnetic drive assembly 3 abuts against the positioning protrusion ring 12. The positioning protrusion ring 12 in the housing 1 can determine whether the electromagnetic drive assembly 3 is assembled in place, thereby ensuring that the upper end of the electromagnetic drive assembly 3 can squeeze the lower valve body 22, forcing it to abut against the upper valve body 21.

[0028] The upper valve body 21 has an upwardly extending annular portion 211 at the top center. The annular portion 211 passes through the central hole of the annular baffle 11 and is connected to the inner cylinder of the shock absorber. The annular portion 211 has several circumferentially distributed inflow holes 212 that pass through the upper and lower ends of the upper valve body 21. The bottom of the upper valve body 21 is provided with a first annular boss 214 outside the inflow holes 212. The valve plate assembly 24 is connected to the bottom center of the upper valve body 21 and abuts against the first annular boss 214 to open or close the inflow holes 212.

[0029] A first flow channel 26 is formed between the upper valve body 21, the lower valve body 22 and the inner wall of the housing 1. A number of through holes 111 that communicate with the first flow channel 26 are evenly distributed on the annular baffle 11. A number of outflow holes 213 that are evenly spaced in the circumferential direction and communicate with the liquid flow cavity 25 are provided on the outer edge of the upper valve body 21. The outflow holes 213 are connected to the first flow channel 26.

[0030] The bottom of the upper valve body 21 is provided with a second annular boss 215 located outside the first annular boss 214, and the upper outer edge of the floating valve body 23 abuts against the second annular boss 215.

[0031] The first annular boss 214 and the upper end face of the valve plate assembly 24 form an annular inner cavity, and each inflow hole 212 is connected to the annular inner cavity. The hydraulic oil in the inner cylinder of the electronically controlled shock absorber enters the annular inner cavity through the inflow hole 212. When the hydraulic oil pressure in the annular inner cavity increases to a certain extent, a gap will be generated between the outer edge of the valve plate assembly 24 and the first annular boss 214 to allow the hydraulic oil to flow into the fluid flow chamber 25. When the pressure of the hydraulic oil in the fluid flow chamber 25 increases, it will overcome the thrust of the electromagnetic drive assembly 3, causing the upper outer edge of the floating valve body 23 to separate from the second annular boss 215, thereby opening the outflow hole 213. The hydraulic oil in the fluid flow chamber 25 flows into the outer cylinder of the electronically controlled shock absorber through the outflow hole 213, the first flow channel 26, and the through hole 111. As the pressure of the hydraulic oil changes, the deformation of the outer edge of the valve plate assembly 24 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.

[0032] A reflux chamber is formed between the floating valve body 23 and the lower valve body 22. The floating valve body 23 is provided with a first reflux hole 232 that passes through its upper and lower ends. The first reflux hole 232 connects the liquid flow chamber 25 and the reflux chamber. The lower end of the floating valve body 23 is provided with a convex shaft 231 that extends downward and passes through the central hole of the lower valve body 22. The convex shaft 231 is provided with a second reflux hole 233 that communicates with the reflux chamber. The output end of the electromagnetic drive assembly 3 abuts against the lower end of the convex shaft 231 to open or close the second reflux hole 233. A second flow channel 27 is provided between the lower valve body 22 and the electromagnetic drive assembly 3. One end of the second flow channel 27 is connected to the first flow channel 26, and the other end is connected to the second reflux hole 233.

[0033] When the hydraulic oil in the outer cylinder of the electronically controlled shock absorber needs to flow back to the inner cylinder, the output end of the electromagnetic drive assembly 3 opens the second return hole 233. The hydraulic oil in the outer cylinder flows sequentially through the through hole 111, the first flow channel 26, the second flow channel 27, the second return hole 233, the return chamber, the first return hole 232, the fluid flow chamber 25, the gap between the valve plate assembly 24 and the first annular boss 214, and the inflow hole 212, finally entering the inner cylinder of the electronically controlled shock absorber. During this process, the pressure in the return chamber increases, thereby pushing the floating valve body 23 upward, so that its upper end abuts against the second annular boss 215, thereby closing the outflow hole 213.

[0034] The electromagnetic drive assembly 3 includes a magnetically conductive shell 31 and a base 32 arranged from top to bottom. The top of the magnetically conductive shell 31 abuts against the bottom of the lower valve body 22, and its outer edge abuts against the positioning protrusion ring 12. The base 32 is tightly fitted to the bottom of the housing 1 and abuts against the magnetically conductive shell 31. The magnetically conductive shell 31 has a central shaft hole, in which a movable armature push rod 33 is slidably connected. An annular receiving cavity 311 is provided between the magnetically conductive shell 31 and the base 32, and a coil group 34 surrounding the movable armature push rod 33 is provided in the receiving cavity 311. This is prior art, so it will not be described in detail here.

[0035] 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 external solenoid valve for an electronically controlled vibration damper, comprising a housing (1) and a control valve core assembly (2) and an electromagnetic drive assembly (3) arranged sequentially from top to bottom within the housing (1); characterized in that: The control valve core assembly (2) includes an upper valve body (21), a lower valve body (22), a floating valve body (23), and a valve plate assembly (24). The upper valve body (21) and the lower valve body (22) are arranged from top to bottom in the housing (1), and a liquid flow chamber (25) is formed between the upper valve body (21) and the lower valve body (22). The valve plate assembly (24) is connected to the bottom of the upper valve body (21), and the floating valve body (23) is movably connected in the liquid flow chamber (25). The top of the housing (1) is provided with an annular baffle (11). The upper end of the upper valve body (21) abuts against the annular baffle (11). The electromagnetic drive assembly (3) is interference-connected to the lower end of the housing (1), and the upper end of the electromagnetic drive assembly (3) abuts against the lower end of the lower valve body (22), and the upper end of the lower valve body (22) abuts against the upper valve body (21).

2. The external solenoid valve for the electronically controlled vibration damper according to claim 1, characterized in that: The housing (1) is provided with a positioning protrusion (12), and the upper outer edge of the electromagnetic drive assembly (3) abuts against the positioning protrusion (12).

3. The external solenoid valve for the electronically controlled vibration damper according to claim 1, characterized in that: The upper valve body (21) has an upwardly extending annular portion (211) at the top center. The annular portion (211) passes through the central hole of the annular baffle (11) and is connected to the inner cylinder of the shock absorber. The annular portion (211) has several circumferentially distributed inflow holes (212) that penetrate the upper and lower ends of the upper valve body (21). The bottom of the upper valve body (21) is provided with a first annular boss (214) outside the inflow holes (212). The valve plate group (24) is connected to the bottom center of the upper valve body (21) and abuts against the first annular boss (214) to open or close the inflow holes (212).

4. The external solenoid valve for the electronically controlled vibration damper according to claim 3, characterized in that: A first flow channel (26) is formed between the upper valve body (21), the lower valve body (22) and the inner wall of the housing (1). A number of through holes (111) communicating with the first flow channel (26) are evenly distributed on the annular baffle (11). A number of outflow holes (213) are evenly distributed in the circumferential direction and communicating with the liquid flow cavity (25) on the outer edge of the upper valve body (21). The outflow holes (213) are connected to the first flow channel (26).

5. The external solenoid valve for the electronically controlled vibration damper according to claim 3, characterized in that: The bottom of the upper valve body (21) is provided with a second annular boss (215) located outside the first annular boss (214), and the upper outer edge of the floating valve body (23) abuts against the second annular boss (215).

6. The external solenoid valve for the electronically controlled vibration damper according to claim 5, characterized in that: A reflux chamber is formed between the floating valve body (23) and the lower valve body (22). The floating valve body (23) is provided with a first reflux hole (232) that passes through its upper and lower ends. The first reflux hole (232) connects the liquid flow chamber (25) and the reflux chamber. The lower end of the floating valve body (23) is provided with a convex shaft (231) that extends downward and passes through the center hole of the lower valve body (22). The convex shaft (231) is provided with a second reflux hole (233) that communicates with the reflux chamber. The output end of the electromagnetic drive assembly (3) abuts against the lower end of the convex shaft (231) to open or close the second reflux hole (233). A second flow channel (27) is provided between the lower valve body (22) and the electromagnetic drive assembly (3). One end of the second flow channel (27) is connected to the first flow channel (26), and the other end is connected to the second reflux hole (233).

7. The external solenoid valve for the electronically controlled vibration damper according to claim 2, characterized in that: The electromagnetic drive assembly (3) includes a magnetic housing (31) and a base (32) arranged from top to bottom. The top of the magnetic housing (31) abuts against the bottom of the lower valve body (22), and its top outer edge abuts against the positioning protrusion ring (12). The base (32) is tightly connected to the bottom of the housing (1) and abuts against the magnetic housing (31). The magnetic housing (31) is provided with a central shaft hole, and a moving armature push rod (33) is slidably connected in the central shaft hole. An annular accommodating cavity (311) is provided between the magnetic housing (31) and the base (32), and a coil group (34) surrounding the moving armature push rod (33) is provided in the accommodating cavity (311).

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