Electromagnetic valve and electromagnetic valve driving mechanism

Abstract

The electromagnetic valve and the electromagnetic valve driving mechanism comprise a welding assembly and a coil assembly (3) which are matched in an inserted mode, a center hole is formed in the center of the coil assembly, the welding assembly comprises a pushing mechanism composed of a static iron core (1) and a movable iron core (5.1), and one end, penetrating out of the center hole of the coil assembly, of the static iron core (1) of the welding assembly is sleeved with a shaft clamp (2). The detachable function is achieved through the welding assembly and the coil assembly which are connected in an inserted mode.

Description

Technical Field

[0001] The utility model relates to a driving mechanism, in particular to a mechanism for driving a solenoid valve on a hydraulic shock absorber, and belongs to the technical field of solenoid valves. Background Art

[0002] Currently, solenoid valve actuators all utilize electromagnetic drive, utilizing an energized coil assembly to drive the movement of a movable iron core, which in turn closes or opens the valve assembly via a push rod attached to the movable iron core. Conventional actuators utilize an integral injection molding process to encapsulate the coil assembly after assembly. Therefore, once assembled, the coil assembly cannot be disassembled or replaced, hindering both production adjustments and subsequent maintenance. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a detachable solenoid valve and a solenoid valve driving mechanism.

[0004] The purpose of this utility model is achieved in this way:

[0005] A solenoid valve drive mechanism includes a plug-in welding assembly and a coil assembly. A center hole is provided in the center of the coil assembly. The welding assembly includes a pushing mechanism consisting of a static iron core and a moving iron core, and a shaft clamp is mounted on one end of the static iron core of the welding assembly that passes through the center hole of the coil assembly.

[0006] Preferably, the static iron core and the pole shoe of the welding assembly are welded together through a magnetic isolation sleeve to form a chamber, and the moving iron core constituting the moving iron core assembly is located in the chamber, and the moving iron core is fixedly mounted on the push rod, the limit block is fixedly arranged in the pole shoe, and an elastic part is located between the moving iron core and the limit block.

[0007] Preferably, the upper portion of the push rod is inserted into the first bushing in the static iron core, and the lower portion of the push rod is inserted into the second bushing in the pole shoe.

[0008] Preferably, the elastic member is a return spring, and the return spring is sleeved on the push rod.

[0009] Preferably, the coil assembly includes a coil frame, the coil frame is arranged in the shell, the coil winding is wound on the coil frame, the pressure plate is pressed on the upper surface of the coil frame, the plug connector wraps the coil frame, the coil winding, the shell and the pressure plate, and the center hole of the plug connector is connected to the center hole of the pressure plate and the center hole of the coil frame.

[0010] Preferably, the central aperture of the pressure plate is smaller than the central aperture of the coil frame, so that the connection between the pressure plate and the coil frame forms a limiting step surface; an annular step surface is provided on the outer wall of the static iron core, and the annular step surface is attached to the above-mentioned limiting step surface.

[0011] Preferably, the shaft clamp adopts a flat-edge shaft clamp structure.

[0012] A solenoid valve includes a relief valve, and the relief valve is driven by the above-mentioned solenoid valve driving mechanism, the relief valve body of the relief valve is composed of an upper valve body and a lower valve body spliced ​​together from top to bottom, an oil outlet hole is provided on the side wall of the lower valve body, and the bottom of the lower valve body is an oil inlet, a top surface of the upper valve body is provided with a notch groove along its radial direction, the top surface of the upper valve body is fitted on the bottom surface of the pole shoe, and a control base is embedded in the bottom of the upper valve body, an upper valve disc and a lower valve disc are pressed together on the upper and lower surfaces of the control base, an overflow base is embedded in the bottom of the lower valve body, a control valve core and a valve core spring are provided in the upper valve body, an overflow valve core and an overflow spring are provided in the lower valve body, and the valve core spring is located between the control valve core and the upper valve disc, and the overflow spring is located between the lower valve disc and the relief valve core.

[0013] Preferably, an annular oil groove is provided on the outer wall of the overflow valve core.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The drive mechanism of the utility model is composed of a welding assembly and a coil assembly. After the coil assembly is mounted on the welding assembly, the coil assembly is fixed by external clamping using a fixing piece (such as a shaft clamp). Therefore, the drive mechanism can be easily disassembled and assembled, and can be replaced and repaired separately, thereby reducing after-sales maintenance costs.

[0016] At the same time, the welding points of the welding assembly are placed inside the coil assembly after assembly, which simplifies the welding process and improves welding reliability. The welding assembly adopts a wedge-shaped pole shoe and a chamfered armature structure, which can conveniently provide a magnetic isolation angle. As for the coil assembly, the shell, pressure plate and coil winding are integrally injection-molded to form a plug connector, so it can be easily removed as a whole for separate inspection, maintenance or replacement without destroying the entire solenoid valve drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a solenoid valve drive mechanism of the utility model.

[0018] Figure 2 This is a schematic structural diagram of the coil assembly in the present invention.

[0019] Figure 3 It is a structural schematic diagram of the welding assembly in the present utility model.

[0020] Figure 4 This is a structural diagram of the moving iron core assembly in the utility model.

[0021] Figure 5 This is a structural diagram of a solenoid valve of the utility model.

[0022] Figure 6 It is a structural diagram of the overflow valve in the utility model.

[0023] in:

[0024] Static iron core 1, shaft clamp 2, coil assembly 3, bushing 1 4, moving iron core assembly 5, return spring 6, limit block 7, bushing 2 8, magnetic isolation sleeve 9, pole shoe 10;

[0025] Pin 3.1, coil frame 3.2, coil winding 3.3, housing 3.4, pressure plate 3.5, plug connector 3.6;

[0026] Moving iron core 5.1, push rod 5.2.

[0027] Overflow valve body 21, control base 22, control valve core 23, valve core spring 24, upper valve plate 25, lower valve plate 26, overflow base 27, overflow valve core 28, overflow spring 29;

[0028] Upper valve body 211, lower valve body 212;

[0029] Annular oil groove 281;

[0030] Notch groove 2111. DETAILED DESCRIPTION

[0031] See also Figures 1 to 4 The utility model relates to a solenoid valve driving mechanism, comprising a plug-fit welding assembly and a coil assembly;

[0032] The welding assembly includes a static iron core 1, a bushing 1 4, a moving iron core assembly 5, a return spring 6, a limit block 7, a bushing 2 8, a magnetic isolation sleeve 9 and a pole shoe 10; the static iron core 1 and the pole shoe 10 are welded together via the magnetic isolation sleeve 9 to form a chamber, the moving iron core 5.1 constituting the moving iron core assembly 5 is located in the chamber, and the moving iron core 5.1 is fixedly sleeved on the push rod 5.2, and the upper part of the push rod 5.2 is inserted into the bushing 1 4 in the static iron core 1, and the lower part of the push rod 5.2 is inserted into the bushing 2 8 in the pole shoe 10, and the lower part of the push rod 5.2 is connected to the valve assembly after passing through the pole shoe 10; the limit block 7 is fixedly arranged in the pole shoe 10, and the return spring 6 is sleeved on the push rod 5.2, and the return spring 6 is located between the moving iron core 5.1 and the limit block 7;

[0033] The coil assembly includes a coil bobbin 3.2, which is disposed within a housing 3.4. A coil winding 3.3 is wound around the coil bobbin 3.2. A pressure plate 3.5 is pressed onto the upper surface of the coil bobbin 3.2. An injection-molded plug connector 3.6 encases the coil bobbin 3.2, the coil winding 3.3, the housing 3.4, and the pressure plate 3.5. The center hole of the plug connector 3.6 is coaxially connected to the center hole of the pressure plate 3.5 and the center hole of the coil bobbin 3.2. A pin 3.1 is located within the plug connector 3.6 and is electrically connected to the coil winding 3.3.

[0034] Then, insert the welding assembly into the hollow hole of the coil assembly from bottom to top;

[0035] And because: the central aperture of the pressure plate 3.5 is smaller than the central aperture of the coil frame 3.2, the connection part of the pressure plate 3.5 and the coil frame 3.2 forms a limiting step surface; at the same time, an annular step surface is provided on the outer wall of the static iron core 1, and the annular step surface is attached to the above-mentioned limiting step surface, thereby preventing the upward displacement of the welding assembly.

[0036] Subsequently, an axis clamp 2 is mounted on one end of the welding assembly extending outside the coil assembly to fix the assembly. The axis clamp 2 adopts a flat-edge axis clamp structure.

[0037] When the coil assembly needs to be disassembled for inspection, adjustment, maintenance or replacement, the shaft clamp 2 can be removed, and then the welding assembly can be easily separated from the coil assembly downward, thereby separating the coil assembly and the welding assembly.

[0038] See also Figure 5 , a solenoid valve, wherein the solenoid valve is driven by the above-mentioned solenoid valve driving mechanism to drive the overflow valve.

[0039] See also Figure 6, the relief valve body 21 of the relief valve is embedded in the pole shoe 10, and the relief valve body 21 is composed of an upper valve body 211 and a lower valve body 212 spliced ​​together from top to bottom (specifically: the top of the upper valve body 211 is provided with a shoulder, and after the lower valve body 212 is inserted from bottom to top, the top surface of the lower valve body 212 is fitted on the bottom surface of the shoulder of the upper valve body 211, and a sealing ring is embedded, and the top inner side wall of the lower valve body 212 is tightly connected to the outer side wall of the upper valve body 211), an oil outlet hole is provided on the side wall of the lower valve body 212, and the bottom of the lower valve body 212 is the oil inlet, and a notch groove 2111 is provided on the top surface of the upper valve body 211 along its radial direction, the top surface of the upper valve body 211 is fitted on the bottom surface of the pole shoe 10, and a control base 22 is embedded in the bottom of the upper valve body 211, and the control base The upper and lower surfaces of 22 are respectively pressed with the upper valve disc 25 and the lower valve disc 26, the bottom of the lower valve body 212 is embedded with the overflow base 27, and the upper valve body 211 is provided with a control valve core 23 and a valve core spring 24, the lower valve body 212 is provided with an overflow valve core 28 and an overflow spring 29, and the valve core spring 24 is located between the control valve core 23 and the upper valve disc 25, and the overflow spring 29 is located between the lower valve disc 26 and the overflow valve core 28. Overflow holes are provided on the control valve core 23, the upper valve disc 25, the control base 22, the lower valve disc 26 and the overflow valve core 28, and a guide gap is provided between the overflow valve core 28 and the overflow base 27; at the same time, an annular oil groove 281 is provided on the outer wall of the overflow valve core 28, thereby providing a lubrication channel for the overflow valve core 28 to move with a small gap.

[0040] In addition: It should be noted that the above specific implementation is only an optimization scheme of this patent. Any changes or improvements made by technicians in this field based on the above concept are within the scope of protection of this patent.

Claims

1. A solenoid valve driving mechanism, characterized in that: It comprises a plug-in welding assembly and a coil assembly (3), wherein a center hole is arranged at the center of the coil assembly, the welding assembly comprises a driving mechanism consisting of a static iron core (1) and a moving iron core (5.1), and a shaft clamp (2) is sleeved on one end of the static iron core (1) of the welding assembly that passes through the center hole of the coil assembly.

2. The solenoid valve driving mechanism according to claim 1, characterized in that: The static iron core (1) and the pole shoe (10) of the welding assembly are welded together via a magnetic isolation sleeve (9) to form a chamber, and the moving iron core (5.1) of the moving iron core assembly (5) is located in the chamber, and the moving iron core (5.1) is fixedly sleeved on the push rod (5.2), the limit block (7) is fixedly arranged in the pole shoe (10), and an elastic member is located between the moving iron core (5.1) and the limit block (7).

3. The solenoid valve driving mechanism according to claim 2, characterized in that: The upper part of the push rod (5.2) is inserted into the bushing 1 (4) in the static iron core (1), and the lower part of the push rod (5.2) is inserted into the bushing 2 (8) in the pole shoe (10).

4. The solenoid valve driving mechanism according to claim 2, characterized in that: The elastic member is a return spring (6), and the return spring (6) is sleeved on the push rod (5.2).

5. The solenoid valve driving mechanism according to claim 1, characterized in that: The coil assembly comprises a coil frame (3.2), the coil frame (3.2) is arranged in a shell (3.4), the coil winding (3.3) is wound on the coil frame (3.2), the pressing plate (3.5) is pressed on the upper surface of the coil frame (3.2), the plug connector (3.6) wraps the coil frame (3.2), the coil winding (3.3), the shell (3.4) and the pressing plate (3.5), and the center hole of the plug connector (3.6) is connected to the center hole of the pressing plate (3.5) and the center hole of the coil frame (3.2).

6. The solenoid valve driving mechanism according to claim 5, characterized in that: The central aperture of the pressing plate (3.5) is smaller than the central aperture of the coil frame (3.2), so that the connection portion of the pressing plate (3.5) and the coil frame (3.2) forms a limiting step surface; an annular step surface is provided on the outer wall of the static iron core (1), and the annular step surface is affixed to the above-mentioned limiting step surface.

7. The solenoid valve driving mechanism according to claim 1, characterized in that: The shaft clamp (2) adopts a flat-side shaft clamp structure.

8. A solenoid valve, characterized in that: The invention comprises a relief valve, and the relief valve is driven by a solenoid valve driving mechanism as claimed in claim 1, wherein the relief valve body (21) of the relief valve is formed by splicing an upper valve body (211) and a lower valve body (212) from top to bottom, an oil outlet hole is arranged on the side wall of the lower valve body (212), the bottom of the lower valve body (212) is an oil inlet, a notch groove (2111) is arranged on the top surface of the upper valve body (211) along its radial direction, the top surface of the upper valve body (211) is in contact with the bottom surface of the pole shoe (10), and a control base (211) is embedded in the bottom of the upper valve body (211) 22, an upper valve plate (25) and a lower valve plate (26) are respectively pressed on the upper and lower surfaces of the control base (22), an overflow base (27) is embedded in the bottom of the lower valve body (212), and a control valve core (23) and a valve core spring (24) are arranged in the upper valve body (211), and an overflow valve core (28) and an overflow spring (29) are arranged in the lower valve body (212), and the valve core spring (24) is located between the control valve core (23) and the upper valve plate (25), and the overflow spring (29) is located between the lower valve plate (26) and the overflow valve core (28).

9. The solenoid valve according to claim 8, characterized in that: An annular oil groove (281) is provided on the outer wall of the overflow valve core (28).

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