A closed electromagnetic structure

Abstract

This utility model relates to a closed electromagnet structure, belonging to the field of electrical control switch technology. It includes a housing, within which an electromagnet assembly penetrates one end face of the housing. The electromagnet assembly includes a moving iron core, with a coil frame nested between the moving iron core and the housing. A coil is mounted on the coil frame. A stationary iron core, sleeved with the coil frame, is located at the front end of the moving iron core. A push rod, threadedly fixed to the moving iron core, is located within the stationary iron core. One end of the push rod is threaded onto the moving iron core, forming a linkage between the push rod and the moving iron core. The other end of the push rod passes through the stationary iron core and protrudes outside the housing for outputting power. It has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life. By optimizing the magnetic circuit and mechanical structure, it can achieve fast response, high-precision control, and high-efficiency output.

Description

Technical Field

[0001] This utility model relates to the field of electrical control switch technology, specifically to a closed electromagnet structure. Background Technology

[0002] A closed electromagnet is a device that generates electromagnetic force when energized. Closed electromagnets are mainly used in circuit breakers as electrical control accessories. The working principle is as follows: a conductive coil, matching its electric power, is wound around the outside of an iron core. When the conductive coil is energized, it generates a magnetic field. This directional magnetic field attracts and moves the suspended iron core, overcoming the spring's reaction force. When the coil is de-energized, the iron core returns to its original position under the spring force. To prevent the iron core from becoming magnetized after the electromagnet is de-energized, we use electrical pure iron rod material that demagnetizes quickly. Such an electromagnet is magnetic when energized and demagnetizes quickly after de-energization, without affecting the iron core's return to its original position.

[0003] The existing closed electromagnets used in circuit breakers have an unreasonable structural design: both ends of the push rod are threaded, one end is fixed to the moving iron core, and the other end extends to the outside of the stationary iron core and is fixed with two nuts. During use, the nuts are easy to loosen, which causes changes in the push rod stroke; the push rod has a short service life, and the closed electromagnet has defects such as complex structure, unreliable performance and inconvenient assembly. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a closed electromagnet structure that is simple in structure, stable and reliable in performance, easy to assemble, and has a long service life. By optimizing the magnetic circuit and mechanical structure, it achieves rapid response, high-precision control, and high-efficiency output.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0006] A closed electromagnet structure includes a housing, within which an electromagnet assembly is disposed, penetrating one end face of the housing. The electromagnet assembly includes a moving iron core, a coil frame nested between the moving iron core and the housing, a coil mounted on the coil frame, and a stationary iron core at the front end of the moving iron core that is sleeved with the coil frame. A push rod, threadedly fixed to the moving iron core, is disposed within the stationary iron core. One end of the push rod is threaded onto the threads of the moving iron core, forming a linkage between the push rod and the moving iron core; the other end of the push rod passes through the stationary iron core and protrudes outside the housing for outputting power.

[0007] The housing protects and supports the electromagnet assembly. The coil, wound on a coil frame, generates a magnetic field when current flows through it and is the core component of the electromagnet. The moving iron core is nested within the coil frame, while the stationary iron core is connected to the moving iron core via a push rod.

[0008] Preferably, a spring is provided between the stationary iron core and the moving iron core, which is sleeved with the push rod. The spring and the stationary iron core have a countersunk insertion structure. The spring is used to provide the restoring force for the push rod.

[0009] Preferably, a bushing is provided between the coil frame and the moving iron core and stationary iron core, which is fixedly fitted into the coil frame. The nested design of the moving iron core and the coil frame improves the utilization efficiency of the magnetic field.

[0010] Preferably, the rear end of the housing is provided with a cover plate, and each of the four corners of the cover plate is provided with a threaded rod penetrating the housing. Each of the four corners of the front end of the housing is provided with a locking nut that is threadedly connected and fixed to the threaded rod.

[0011] Preferably, each of the four corners of the outer end face of the cover plate is provided with a spring washer that engages with the screw, and a flat washer that engages with the screw is provided between the spring washer and the cover plate. The use of spring washers and flat washers not only enhances the sealing performance but also improves the durability of the overall structure.

[0012] Preferably, the push rod includes a connecting rod, one end of which is threaded and fixed to the moving iron core, and the other end of which is a contact with a front end having an arc-shaped structure. A limiting external hexagonal block is provided between the contact and the connecting rod, which is coaxially integrated with the contact and the connecting rod.

[0013] This invention can achieve the following effects:

[0014] This invention provides a closed electromagnet structure, which, compared with existing technologies, has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life. By optimizing the magnetic circuit and mechanical structure, it can achieve fast response, high-precision control, and high-efficiency output.

[0015] Fast response: It generates a magnetic field rapidly after being powered on, making it suitable for applications requiring rapid action.

[0016] Excellent control performance: The magnetic force output can be precisely controlled by adjusting the current.

[0017] Simple structure: easy to maintain and easy to integrate into automation systems.

[0018] High load-bearing capacity: suitable for applications requiring significant mechanical force. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is an exploded view of the structure of this utility model.

[0021] Figure 3This is a structural cross-sectional view of the present invention.

[0022] Figure 4 This is a schematic diagram of the push rod structure of this utility model.

[0023] In the diagram: 1. Cover plate; 2. Housing; 3. Electromagnet assembly; 4. Locking nut; 5. Screw; 6. Moving iron core; 7. Spring; 8. Coil; 9. Bushing; 10. Stationary iron core; 11. Push rod; 12. Coil frame; 13. Spring washer; 14. Flat washer; 15. Connecting rod; 16. Contact; 17. Limiting hexagonal block. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0025] Example: Figure 1-4 As shown, a closed electromagnet structure includes a housing 2, a cover plate 1 at the rear end of the housing 2, screws 5 penetrating the housing 2 at each of the four corners of the cover plate 1, and locking nuts 4 threadedly connected to the screws 5 at each of the four corners of the front end of the housing 2. Spring washers 13 connected to the screws 5 are located at each of the four corners of the outer end face of the cover plate 1, and flat washers 14 connected to the screws 5 are located between the spring washers 13 and the cover plate 1. An electromagnet assembly 3 penetrating the front end face of the housing 2 is located inside the housing 2. The electromagnet assembly 3 includes a moving iron core 6, a coil frame 12 nested between the moving iron core 6 and the housing 2, a coil 8 on the coil frame 12, a stationary iron core 10 connected to the coil frame 12 at the front end of the moving iron core 6, and a bushing 9 fixedly connected to the coil frame 12 between the coil frame 12, the moving iron core 6, and the stationary iron core 10. The stationary iron core 10 contains a push rod 11 that is threadedly connected and fixed to the moving iron core 6. The push rod 11 includes a connecting rod 15. One end of the connecting rod 15 is threaded and fixed to the moving iron core 6, and the other end of the connecting rod 15 has a contact 16 with an arc-shaped front end. Between the contact 16 and the connecting rod 15, there is a limiting hexagonal block 17 that is coaxial with the contact 16 and the connecting rod 15. A spring 7 is provided between the stationary iron core 10 and the moving iron core 6, which is sleeved with the push rod 11. The spring 7 and the stationary iron core 10 have a countersunk insertion structure.

[0026] The moving iron core 6 of the electromagnet assembly 3 is connected to the push rod 11 by a threaded connection, and the connection is cured with special adhesive. This makes the assembly of the push rod 11 and the moving iron core 6 more convenient and the connection between the push rod 11 and the moving iron core 6 more reliable. During use, the push rod 11 is not easy to loosen and will not tilt. Two or four screws 5 are symmetrically arranged on the housing 2. The screws 5 pass through the housing 2 and the cover plate 1 in sequence and are tightened with locking nuts 4. The housing 2 and the cover plate 1 are connected by screws 5, which ensures a tighter connection between the housing 2 and the cover plate 1 and helps to improve the overall strength of the housing 1. Four protrusions are provided at one end of the housing 2, and corresponding grooves are provided on the cover plate 2 to cooperate with the four protrusions. After assembly, the positioning is reliable and the assembly is more convenient, which helps to improve the assembly efficiency of the closed electromagnet. The stationary iron core 10 is provided with a positioning groove corresponding to the spring 7. The spring 7 is fitted on the push rod 11, with both ends pressing between the moving iron core 6 and the stationary iron core 10. This makes the assembly more convenient and ensures that the push rod 11 can be reliably reset.

[0027] The working principle of a closed electromagnet is based on the magnetic effect of electric current: when current passes through the coil, a magnetic field is generated around the coil. The magnetic field acts on the moving and stationary iron cores, causing them to produce magnetic attraction or repulsion. The moving iron core moves under the influence of the magnetic field, and the force is transmitted to the external mechanism through a push rod, thus realizing the mechanical action.

[0028] In summary, this closed electromagnet structure has the advantages of simple structure, stable and reliable performance, convenient assembly, and long service life. By optimizing the magnetic circuit and mechanical structure, it is possible to achieve fast response, high-precision control, and high-efficiency output.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A closed electromagnet structure, characterized by: The device includes a housing (2), and an electromagnet assembly (3) is provided inside the housing (2) that penetrates one end face of the housing (2). The electromagnet assembly (3) includes a moving iron core (6), and a coil frame (12) is provided between the moving iron core (6) and the housing (2) and nested with the moving iron core (6). A coil (8) is provided on the coil frame (12). A stationary iron core (10) is provided at the front end of the moving iron core (6) and is sleeved with the coil frame (12). A push rod (11) is provided inside the stationary iron core (10) and is threadedly sleeved and fixed with the moving iron core (6).

2. The closed electromagnet structure according to claim 1, characterized in that: A spring (7) is provided between the stationary iron core (10) and the moving iron core (6) and is sleeved with the push rod (11). The spring (7) and the stationary iron core (10) have a countersunk hole insertion structure.

3. The closed electromagnet structure according to claim 1, characterized in that: The coil frame (12) is provided with a bushing (9) that is snap-fitted and fixed to the moving iron core (6) and the stationary iron core (10).

4. The closed electromagnet structure according to claim 1, characterized in that: The housing (2) has a cover plate (1) at the rear end. The cover plate (1) has screws (5) that penetrate the housing (2) at all four corners. The housing (2) has locking nuts (4) that are threadedly connected and fixed to the screws (5) at all four corners at the front end.

5. A closed electromagnet structure according to claim 4, characterized in that: The cover plate (1) is provided with spring washers (13) on the four corners of the outer end face, which are connected to the screw (5). The spring washers (13) and the cover plate (1) are provided with flat washers (14) connected to the screw (5).

6. A closed electromagnet structure according to claim 1, characterized in that: The push rod (11) includes a connecting rod (15). One end of the connecting rod (15) is threaded and fixed to the moving iron core (6). The other end of the connecting rod (15) is provided with a contact (16) with an arc-shaped front end. A limiting external hexagonal block (17) is provided between the contact (16) and the connecting rod (15) and is coaxial with the contact (16) and the connecting rod (15).

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