A valve core drive mechanism for a solenoid valve

Abstract

This utility model provides a valve core driving mechanism for an electromagnetic valve, including a valve sleeve and a valve core slidably mounted in the valve sleeve. A driving assembly is installed at the left end of the valve sleeve. The driving assembly includes a mounting base and a housing mounted on the mounting base. A push rod is installed inside the mounting base, and the push rod pushes the end face of the valve core to the right. A coil is installed inside the housing, and a moving iron core is slidably inserted into the coil. The push rod and the moving iron core are fixedly connected. A first return spring is installed in the valve sleeve, and the first return spring pushes the valve core to the left and fits it against the right end face of the push rod. By applying a continuous balancing force to the valve core, the sensitivity of the valve core's movement after the coil is energized and the smoothness of the valve core's movement in the valve sleeve are improved, avoiding valve core jamming and lag, and improving the response speed of the electromagnetic valve.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic systems, and in particular to a valve core drive mechanism for a solenoid valve. Background Technology

[0002] Solenoid valves are a common type of hydraulic component used to control fluids. Existing solenoid valves control the movement of the valve core using electromagnetic force to regulate fluid flow. However, during the reciprocating movement of the valve core, issues such as machining inaccuracies and wear can cause problems like uneven movement or valve core jamming, affecting the sensitivity of the solenoid valve. In applications requiring rapid response and precise control, such as proportional valves, this can lead to sluggish or discontinuous actuator action. Utility Model Content

[0003] The technical problem to be solved by this utility model is that the valve core of the existing solenoid valve is prone to jamming. This utility model provides a valve core driving mechanism for a solenoid valve to solve the above problem.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a valve core driving mechanism for an electromagnetic valve, comprising a valve sleeve and a valve core slidably installed in the valve sleeve, a driving assembly installed at the left end of the valve sleeve, the driving assembly comprising a mounting base and a housing installed on the mounting base, a push rod installed in the mounting base, the push rod pushing the end face of the valve core to the right; a coil installed in the housing, a moving iron core slidably inserted in the coil, the push rod and the moving iron core being fixedly connected; a first return spring installed in the valve sleeve, the first return spring pushing the valve core to the left to fit against the right end face of the push rod, an end cap installed at the left end of the housing, an adjusting assembly installed on the end cap, the adjusting assembly comprising a second return spring and an adjusting plug screwed on the end cap, the adjusting plug pushing the second return spring to the right to push the moving iron core.

[0005] Furthermore: the valve core is provided with an oil groove and a guide hole communicating with the oil groove, and the valve sleeve is provided with an oil passage communicating with the oil groove.

[0006] Furthermore: the right end of the mounting base is provided with a threaded hole, and the left end of the valve sleeve is provided with an installation thread. The valve sleeve is screwed onto the mounting base through the cooperation of the threaded hole and the installation thread.

[0007] Furthermore, a spring guide is provided at the left end of the valve core.

[0008] The beneficial effects of this utility model are that the valve core driving mechanism of the solenoid valve improves the sensitivity of the valve core movement after the coil is energized and the smoothness of the valve core in the valve sleeve by applying a continuous balancing force to the valve core, avoiding valve core jamming and lag, and improving the response speed of the solenoid valve. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 This is a cross-sectional view (left side of the valve core) of the solenoid valve of this utility model;

[0011] Figure 2 This is a cross-sectional view (right side of the valve core) of the solenoid valve of this utility model;

[0012] Figure 3 This is a schematic diagram of the valve sleeve structure;

[0013] Figure 4 This is a schematic diagram of the valve core.

[0014] In the diagram: 1. Valve sleeve, 2. Valve core, 3. Mounting seat, 4. Housing, 5. Push rod, 6. Coil, 7. Moving iron core, 8. First return spring, 9. End cover, 10. Second return spring, 11. Adjusting screw plug, 12. Oil groove, 13. Guide hole, 14. Oil passage, 15. Threaded hole, 16. Mounting thread, 17. Spring guide table. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0017] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0019] like Figure 1-4 As shown, this utility model provides a valve core 2 driving mechanism for a solenoid valve, including a valve sleeve 1 and a valve core 2 slidably installed in the valve sleeve 1. A driving assembly is installed at the left end of the valve sleeve 1. The driving assembly includes a mounting base 3 and a housing 4 installed on the mounting base 3. A push rod 5 is installed inside the mounting base 3, and the push rod 5 pushes the end face of the valve core 2 to the right. A coil 6 is installed inside the housing 4, and a moving iron core 7 is slidably inserted into the coil 6. The push rod 5 and the moving iron core 7 are fixedly connected. A first return spring 8 is installed in the valve sleeve 1, and the first return spring 8 pushes the valve core 2 to the left to fit against the right end face of the push rod 5. An end cover 9 is installed at the left end of the housing 4, and an adjustment assembly is installed on the end cover 9. The adjustment assembly includes a second return spring 10 and an adjustment plug 11 screwed onto the end cover 9. The adjustment plug 11 pushes the second return spring 10 to the right to push the moving iron core 7.

[0020] The valve core 2 drive mechanism involved in this application is usually used in the valve core 2 drive of proportional valves. It has the effect of flexible drive and preventing valve core 2 from jamming. Its specific working process is as follows: When in use, in the default state where valve core 2 does not need to move, the first return spring 8 pushes the valve core 2 to the left, while the second return spring 10 pushes the iron core 7 to the right and pushes the push rod 5 to the right through the moving iron core 7. The push rod 5 then pushes the valve core 2 to the right. The force of the first return spring 8 pushing the valve core 2 to the left is greater than the force of the push rod 5 pushing the valve core 2 to the right. Therefore, in this state, the valve core 2 is in the leftmost position, and the left end face of the valve core 2 is in close contact with the right end face of the mounting base 3.

[0021] When valve core 2 needs to move, coil 6 is energized. Under the action of electromagnetic force, moving iron core 7 is attracted and moves to the right. Push rod 5 pushes valve core 2 to the right. The combined action of second return spring 10 and electromagnetic force is greater than the force of first return spring 8. In this way, valve core 2 will move to the right until moving iron core 7 is pressed against the end face of mounting base 3. In this way, valve core 2 is switched to the right position, completing the adjustment and switching of valve core 2 position.

[0022] The valve core 2 driving structure of this application has a spring force on both sides of the valve core 2 even when the coil 6 is not energized. The spring force on both sides acts directly and dynamically on both sides of the valve core 2, which can effectively prevent the valve core 2 from jamming. Once the coil 6 is energized, it can immediately drive the valve core 2 to adjust its position, reducing spring hysteresis and improving the response speed of the solenoid valve.

[0023] The adjustment component can adjust the position of the adjusting screw plug 11, thereby adjusting the initial compression of the second return spring 10. This can adjust the force state on both sides of the valve core 2, so that the solenoid valve has different corresponding performance and the valve core 2 has the ability to resist jamming, so as to suit different working conditions.

[0024] The valve core 2 is provided with an oil groove 12 and a guide hole 13 communicating with the oil groove 12, and the valve sleeve 1 is provided with an oil passage 14 communicating with the oil groove 12. Through the cooperation of the oil passage 14 and the oil groove 12, the valve core 2 can connect different oil passages 14 and oil grooves 12 when it is in the left and right positions, so that the solenoid valve has different position functions.

[0025] The mounting base 3 has a threaded hole 15 on its right end and a mounting thread 16 on its left end. The valve sleeve 1 is screwed onto the mounting base 3 by the cooperation of the threaded hole 15 and the mounting thread 16.

[0026] The mounting base 3 and valve sleeve 1 are detachable in this structure, which provides good assembly processability. When the solenoid valve is initially assembled or needs to be disassembled for maintenance due to solenoid valve failure, each component can be quickly opened for assembly or maintenance, which is convenient for operators.

[0027] A spring guide platform 17 is provided at the left end of the valve core 2. The first return spring 8 is installed on the spring guide platform 17. The spring guide platform 17 has a large volume, which provides a large space for the top rod 5 and the first return spring 8 to apply force. On the other hand, it can play a guiding role during the compression and extension of the first return spring 8, preventing the spring from deflecting and facilitating the first return spring 8 to apply a stable force.

[0028] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A valve core (2) driving mechanism for a solenoid valve, comprising a valve sleeve (1) and a valve core (2) slidably mounted in the valve sleeve (1), characterized in that: A drive assembly is installed at the left end of the valve sleeve (1). The drive assembly includes a mounting base (3) and a housing (4) mounted on the mounting base (3). A push rod (5) is installed inside the mounting base (3). The push rod (5) pushes the end face of the valve core (2) to the right. A coil (6) is installed inside the housing (4). A moving iron core (7) is slidably inserted into the coil (6). The push rod (5) and the moving iron core (7) are fixedly connected. A first return spring (8) is installed in the valve sleeve (1). The first return spring (8) pushes the valve core (2) to the left and fits against the right end face of the push rod (5). An end cover (9) is installed at the left end of the housing (4). An adjustment assembly is installed on the end cover (9). The adjustment assembly includes a second return spring (10) and an adjustment plug (11) screwed onto the end cover (9). The adjustment plug (11) pushes the second return spring (10) to the right and pushes the moving iron core (7).

2. The valve core (2) driving mechanism of a solenoid valve as described in claim 1, characterized in that: The valve core (2) is provided with an oil groove (12) and a guide hole (13) connected to the oil groove (12), and the valve sleeve (1) is provided with an oil passage (14) connected to the oil groove (12).

3. The valve core (2) driving mechanism of a solenoid valve as described in claim 2, characterized in that: The mounting base (3) has a threaded hole (15) on its right end and a mounting thread (16) on its left end. The valve sleeve (1) is screwed onto the mounting base (3) by the cooperation of the threaded hole (15) and the mounting thread (16).

4. The valve core (2) driving mechanism of a solenoid valve as described in claim 3, characterized in that: A spring guide plate (17) is provided at the left end of the valve core (2).

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