External electromagnetic valve for electric control shock absorber

Abstract

The utility model provides an external electromagnetic valve for an electric control shock absorber. The 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 arranged in the shell; the control valve core assembly comprises a sleeve, an upper valve body, a lower valve body, a floating valve body and a valve plate group; the sleeve is arranged in the shell, and a first flow channel is formed between the sleeve and the shell; the upper valve body and the lower valve body are fixedly arranged in the sleeve, and a liquid flow cavity is formed between the upper valve body and the lower valve body; an inflow hole is formed in the upper valve body, and the valve plate group is connected to the bottom of the upper valve body; the peripheral wall of the sleeve is provided with a flow-out hole for communicating the first flow channel with the liquid flow cavity; the floating valve body is movably connected into the liquid flow cavity, the upper end of the floating valve body abuts against the upper valve body, and the lower end of the floating valve body penetrates through the lower valve body and abuts against the output end of the electromagnetic drive assembly. The upper valve body and the lower valve body are riveted together through the sleeve, so that the material of the lower valve body is saved, and the production cost is reduced; the sleeve is easier to machine, the requirement for machining precision is not high, and follow-up assembly is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electromagnetic valve, specifically is for the external electromagnetic valve of electronic control shock absorber. BACKGROUND

[0002] Electronic control shock absorber is a kind of technology related to automobile suspension system, and the electronic control of suspension system is realized by operating the electromagnetic valve of shock absorber, to reduce the vibration in the process of vehicle driving, and to improve the driving stability and safety of automobile, and the comfort of riding.

[0003] In the automobile suspension system, the external electromagnetic valve is an important component of electronic control shock absorber, which can control the flow rate of oil in the electronic control shock absorber, so as to change the damping force of the electronic control shock absorber, improve the comfort of driving a car, for example, the patent application with the announcement number CN118979930A discloses an external electromagnetic valve with oil return structure and an electronic control shock absorber with the same, which can control the flow rate of oil between the inner cylinder and the outer cylinder of the shock absorber in both directions. However, the structure of the electromagnetic valve is relatively complex, the inlet valve body (upper valve body) and the floating valve body are assembled in the main valve body (lower valve body), and the main valve body needs to wrap the inlet valve body and rivet it; since the material and machining precision of the main valve body are required to be high, such design leads to high machining cost of the electromagnetic valve, and the machining precision of the main valve body needs to be ensured during subsequent assembly, which increases the assembly difficulty. SUMMARY

[0004] The technical problem to be solved by the utility model is to overcome the defects of the above prior art, and to provide an external electromagnetic valve of electronic control shock absorber with simple assembly and low cost.

[0005] The technical solution of the utility model is to provide an external electromagnetic valve for electronic control shock absorber with the following structure: a housing, a control valve core assembly and an electromagnetic drive assembly arranged in the housing from top to bottom; the control valve core assembly includes a sleeve, an upper valve body, a lower valve body, a floating valve body and a valve piece group; the sleeve is arranged in the housing, and a first flow channel is formed between the sleeve and the housing; the upper valve body and the lower valve body are fixedly arranged in the sleeve from top to bottom, and a liquid flow cavity is formed between the upper valve body and the lower valve body; a plurality of inflow holes are arranged on the upper valve body in a circumferential direction and penetrate the upper and lower ends of the upper valve body, the valve piece group is connected to the bottom of the upper valve body and used to close the inflow holes; an outflow hole radially penetrating the outer peripheral wall of the sleeve is arranged between the upper valve body and the lower valve body, and used to connect the first flow channel and the liquid flow cavity; the floating valve body is movably connected in the liquid flow cavity, and the upper end of the floating valve body abuts against the lower end of the upper valve body; a convex shaft is arranged on the lower end of the floating valve body, and the convex shaft penetrates the center hole of the lower valve body and abuts against the output end of the electromagnetic drive assembly.

[0006] Compared with the prior art, the external electromagnetic valve for the electric control shock absorber has the following advantages:

[0007] The sleeve (stainless steel material can be used) with low material requirement is used to rotate and rivet the upper valve body and the lower valve body together, so that the material of the lower valve body is saved and the production cost is reduced.

[0008] As preferred, the bottom of the upper valve body is provided with a first annular boss outside the inflow hole, and the upper end surface of the valve plate group abuts against the first annular boss. After the arrangement, the first annular boss and the upper end surface of the valve plate group form an annular cavity, and each inflow hole is in communication with the annular cavity. The hydraulic oil in the inner cylinder of the electric control shock absorber enters the annular cavity through the inflow hole, and the outer edge of the valve plate group and the first annular boss can form a passage for the hydraulic oil to flow out. When the pressure of the hydraulic oil changes, the deformation amount of the outer edge of the valve plate group can also change linearly, so that the flow of the hydraulic oil is also linearly changed, and the electric control shock absorber can exert a linear damping force on the damping system of the vehicle, thereby improving the comfort when driving the vehicle.

[0009] As preferred, the bottom of the upper valve body is provided with a second annular boss outside the first annular boss, and the upper end outer edge of the floating valve body abuts against the second annular boss. The electromagnetic drive assembly can push the upper end outer edge of the floating valve body to abut against the second annular boss to close the outflow hole. When the pressure of the hydraulic oil in the liquid flow cavity increases, the floating valve body can be separated from the second annular boss to open the outflow hole, so that the hydraulic oil in the liquid flow cavity flows into the outer cylinder of the electric control shock absorber through the outflow hole and the first flow channel.

[0010] As preferred, an annular cavity is formed between the floating valve body and the lower valve body, a first return hole is arranged on the floating valve body and penetrates the upper and lower ends of the floating valve body, and the first return hole is used to connect the liquid flow cavity and the annular cavity. A second flow channel is arranged between the lower valve body and the electromagnetic drive assembly, one end of the second flow channel is in communication with the first flow channel, a second return hole is arranged on the protruding shaft, the upper end of the second return hole is radially bent and in communication with the annular cavity, the lower end of the second return hole is in communication with the second flow channel, and the output end of the electromagnetic drive assembly abuts against the lower end of the protruding shaft to open or close the second return hole.

[0011] As preferred, the electromagnetic drive assembly comprises a magnetic conducting shell and a base arranged from top to bottom, a center shaft hole is arranged on the magnetic conducting shell, a moving armature top rod is slidably connected in the center shaft hole, an annular accommodating cavity is arranged between the magnetic conducting shell and the base, and a coil group surrounding the moving armature top rod is arranged in the accommodating cavity. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic view of the utility model.

[0013] Figure 2 It is the structure schematic view of the utility model.

[0014] Figure 3 It is the half sectional view of the utility model.

[0015] Figure 4 It is the structure schematic view of the utility model.

[0016] Mark explanation:

[0017] 1, shell, 2, control valve core assembly, 21, sleeve, 211, outflow hole, 22, upper valve body, 221, inflow hole, 222, first annular boss, 223, second annular boss, 23, lower valve body, 24, floating valve body, 241, convex shaft, 242, first return flow hole, 243, second return flow hole, 25, valve piece group, 26, first flow channel, 27, liquid flow cavity, 28, annular cavity, 29, second flow channel, 3, electromagnetic drive assembly, 31, magnetically conductive shell, 311, containing cavity, 32, base, 33, moving armature top rod, 34, coil group. Specific implementation

[0018] The utility model will be further explained in detail below in combination with the drawings and specific embodiments.

[0019] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model, and the terms "first", "second" and the like are only for distinguishing the names of various components, and do not have primary and secondary relationships, and therefore cannot be understood as limiting the utility model.

[0020] As Figures 1-4 Indicated, the utility model discloses a kind of external electromagnetic valve for electric control shock absorber: including shell 1 and control valve core assembly 2 and electromagnetic drive assembly 3 sequentially arranged from top to bottom in shell 1.

[0021] The control valve core assembly 2 comprises a sleeve 21, an upper valve body 22, a lower valve body 23, a floating valve body 24 and a valve disc set 25. The sleeve 21 is arranged in 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 arranged in 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; three inflow holes 221 are arranged on the upper valve body 22 in a circumferential direction and penetrating through the upper valve body 22 from top to bottom; the valve disc set 25 is coaxially fixed on the bottom of the upper valve body 22 by rivets or bolts; a first annular boss 222 is arranged on the bottom of the upper valve body 22 outside the inflow holes 221; the upper end surface of the valve disc set 25 abuts against the first annular boss 222 for closing the inflow holes 221; an outflow hole 211 is arranged between the upper valve body 22 and the lower valve body 23 and penetrates through the outer circumferential wall of the sleeve 21 in a radial direction, for connecting the first flow channel 26 and the liquid flow cavity 27; a second annular boss 223 is arranged on the bottom of the upper valve body 22 outside the first annular boss 222; the floating valve body 24 is movably connected in the liquid flow cavity 27, and the upper end of the floating valve body 24 abuts against the second annular boss 223 of the upper valve body 22 for closing the outflow hole 211; a convex shaft 241 is arranged on the lower end of the floating valve body 24, and the convex shaft 241 penetrates through the center hole of the lower valve body 23 and abuts against the output end of the electromagnetic drive assembly 3.

[0022] The sleeve 21 made of stainless steel is used to spin rivet the upper valve body 22 and the lower valve body 23 together, so that the material of the lower valve body 23 is saved and the production cost is reduced; the sleeve 21 is easier to process and has low precision requirement, so that the subsequent assembly is more convenient.

[0023] As shown in Figure 2 , Figure 3 , the first annular boss 222 and the upper end surface of the valve disc set 25 form an annular cavity, and each inflow hole 221 is connected with the annular cavity; the hydraulic oil in the inner cylinder of the electronic control shock absorber enters the annular cavity through the inflow hole 221, and when the hydraulic oil pressure in the annular cavity increases to a certain degree, a gap between the outer edge of the valve disc set 25 and the first annular boss 222 is formed for the hydraulic oil to flow into the liquid flow cavity 27; when the hydraulic oil pressure in the liquid flow cavity 27 increases, the upper end outer edge of the floating valve body 24 is separated from the second annular boss 223 to open the outflow hole 211, so that the hydraulic oil in the liquid flow cavity 27 flows into the outer cylinder of the electronic control shock absorber through the outflow hole 211 and the first flow channel 26. In the process of changing the hydraulic oil pressure, the deformation amount of the outer edge of the valve disc set 25 can also change linearly, so that the flow of the hydraulic oil is also linearly changed, and then the electronic control shock absorber can exert a linear damping force on the damping system of the vehicle, thereby improving the comfort when driving the vehicle.

[0024] The annular cavity 28 is formed between the floating valve body 24 and the lower valve body 23, the first backflow hole 242 is arranged through the upper and lower ends of the floating valve body 24, and is used for connecting the liquid flow cavity 27 and the annular cavity 28; the second flow channel 29 is arranged between the lower valve body 23 and the electromagnetic drive assembly 3, one end of the second flow channel 29 is connected with the first flow channel 26; the second backflow hole 243 is arranged on the convex shaft 241, the upper end of the second backflow hole 243 is radially bent and connected with the annular cavity 28, and the lower end of the second backflow hole 243 is connected with the second flow channel 29; the output end of the electromagnetic drive assembly 3 is abutted with the lower end of the convex shaft 241, and is used for opening or closing the second backflow hole 243.

[0025] When the hydraulic oil of the outer cylinder of the electric control shock absorber needs to flow back to the inner cylinder, the output end of the electromagnetic drive assembly 3 opens the second backflow hole 243, the hydraulic oil of the outer cylinder sequentially passes through the first flow channel 26, the second flow channel 29, the second backflow hole 243, the annular cavity 28, the first backflow hole 242, the liquid flow cavity 27, the gap between the valve piece group 25 and the first annular convex platform 222, and the inflow hole 221, and enters the inner cylinder of the electric control shock absorber. In the process, the pressure in the annular cavity 28 increases, thereby pushing the floating valve body 24 to move upwards, so that the upper end of the floating valve body 24 is abutted with the second annular convex platform 223, thereby closing the outflow hole 211.

[0026] The electromagnetic drive assembly 3 comprises a magnetic conducting shell 31 and a base 32 arranged from top to bottom, the magnetic conducting shell 31 is provided with a central shaft hole, a movable armature top rod 33 is slidably connected in the central shaft hole, an annular containing cavity 311 is arranged between the magnetic conducting shell 31 and the base 32, and a coil group 34 is arranged around the movable armature top rod 33 in the containing cavity 311, which is prior art, and will not be described in detail here.

[0027] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model, therefore, the protection scope of the utility model should be subject to the protection scope of 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 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 forms a first flow channel (26) between it 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 (24). The bottom of the valve body (22) is used to close the inflow hole (221); an outflow hole (211) is provided between the upper valve body (22) and the lower valve body (23) to radially penetrate 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 output end of the electromagnetic drive assembly (3).

2. The external solenoid valve for an electronically controlled vibration damper according to claim 1, characterized in that: The bottom of the upper valve body (22) is provided with a first annular boss (222) outside the inlet hole (221), and the upper end face of the valve plate group (25) abuts against the first annular boss (222).

3. The external solenoid valve for an electronically controlled vibration damper according to claim 2, characterized in that: The bottom of the upper valve body (22) is provided with a second annular boss (223) located outside the first annular boss (222), and the upper outer edge of the floating valve body (24) abuts against the second annular boss (223).

4. The external solenoid valve for an electronically controlled vibration damper according to claim 1, characterized in that: 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) penetrating its upper and lower ends for connecting 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) for opening or closing the second return hole (243).

5. The external solenoid valve for an electronically controlled vibration damper according to claim 1, characterized in that: The electromagnetic drive assembly (3) includes a magnetic housing (31) and a base (32) arranged from top to bottom. The magnetic housing (31) has 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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