Non-wear circuit breaker closing holding magnetic force structure

Abstract

A non-wear circuit breaker closing maintaining magnetic force structure comprises a static terminal and a moving terminal, the static terminal is provided with at least two groups of mounting holes from inside to outside along the axial direction, one end of each mounting hole of each group is provided with a corresponding permanent magnet, and the magnetic poles of the permanent magnets in the two adjacent groups of mounting holes are oppositely arranged, so that two groups of magnetic circuits in different directions can be generated; the side, close to the static terminal, of the moving terminal is provided with a groove corresponding to the mounting hole, when the groove is communicated with the mounting hole, the permanent magnets generate magnetic force to attract the moving terminal to the static terminal, the magnetic force of the permanent magnets is used for keeping a closing state, the problem of mechanical abrasion is avoided, the mechanical life of the circuit breaker is remarkably prolonged, and the reliability of the circuit breaker is remarkably improved. The double-magnetic-circuit structural design further reduces abrasion of mechanical parts, and the reliability of the mechanical parts is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a wear-free circuit breaker closing holding magnetic structure. Background Technology

[0002] Circuit breakers, as key electrical components in power systems, primarily function to connect and disconnect circuits under normal operating and fault conditions. Traditional circuit breaker closing and holding mechanisms typically rely on half-shafts or latches. However, these mechanical components inevitably suffer wear during frequent closing and opening operations, which can hinder normal operation and shorten the circuit breaker's mechanical life. Furthermore, the manufacturing processes for half-shafts and latches are relatively complex and costly, which to some extent limits the economic efficiency and reliability of circuit breakers. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a wear-free circuit breaker closing holding magnetic structure.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A wear-free circuit breaker closing holding magnetic structure includes:

[0006] A stationary terminal has at least two sets of mounting holes arranged radially from the inside out. One end of each set of mounting holes is provided with a permanent magnet, and the magnetic poles of the permanent magnets in adjacent sets of mounting holes are arranged in opposite directions.

[0007] The moving terminal has several grooves on one side that correspond to the mounting holes of each group;

[0008] When the side of the moving terminal with the groove contacts the stationary terminal, the groove communicates with the corresponding mounting hole, and each of the permanent magnets generates magnetic force to attract the moving terminal to the stationary terminal.

[0009] Furthermore, each of the mounting holes in each group is arranged in a ring array relative to the central axis of the stationary terminal.

[0010] Furthermore, the stationary terminal is provided with a receiving groove along its axial direction that is adapted to the permanent magnet, and the opening size of the receiving groove is larger than the opening size of the mounting hole.

[0011] Furthermore, the opening sizes of the groove and the mounting hole are different.

[0012] Furthermore, the stationary terminal is provided with a first through hole along its axial direction, and the moving terminal is provided with a corresponding second through hole.

[0013] Furthermore, it also includes a short-circuit device, which is disposed on the side of the stationary terminal where the permanent magnet is located.

[0014] Furthermore, the short-circuit component is provided with a third through hole corresponding to the first through hole.

[0015] Furthermore, a connector extends from the end face of the moving terminal away from the stationary terminal.

[0016] Furthermore, the moving terminal is provided with an exhaust port along its axial direction.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model proposes a wear-free circuit breaker closing and holding magnetic structure, including a stationary terminal and a moving terminal. The stationary terminal has at least two sets of mounting holes along its axial direction from the inside to the outside. Each set of mounting holes has a corresponding permanent magnet at one end, and the magnetic poles of the permanent magnets in adjacent sets of mounting holes are arranged in opposite directions, which can generate two sets of magnetic circuits with different directions. The moving terminal has a groove corresponding to the mounting hole on the side near the stationary terminal. When the groove is connected to the mounting hole, each permanent magnet generates magnetic force to attract the moving terminal to the stationary terminal. The magnetic force of the permanent magnet is used to maintain the closed state, avoiding the problem of mechanical wear, significantly improving the mechanical life and reliability of the circuit breaker. The dual magnetic circuit structure design further reduces the wear of mechanical parts and increases its reliability.

[0019] 2. This utility model proposes a wear-free circuit breaker closing holding magnetic structure. The opening size of the groove is inconsistent with the opening size of the mounting hole, which can effectively reduce the leakage flux in the circuit breaker and improve its performance and reliability. The stationary terminal is also provided with a receiving groove adapted to the permanent magnet, and the opening size of the receiving groove is larger than the opening size of the mounting hole to prevent the permanent magnet from entering the mounting hole through the receiving groove during operation.

[0020] 3. The present invention proposes a wear-free circuit breaker closing holding magnetic structure, wherein the stationary terminal is provided with a first through hole along its axial direction, and the moving terminal is provided with a second through hole corresponding to the first through hole, so as to ensure the accurate movement and stable operation of the stationary terminal and the moving terminal.

[0021] 4. The wear-free circuit breaker closing holding magnetic structure proposed in this utility model also includes a short-circuit element. In an emergency, the short-circuit element is moved to abut against the stationary terminal, causing a short circuit in the magnetic circuit generated by the permanent magnet, thereby achieving opening. The short-circuit element has a ring structure, which can achieve the maximum volumetric efficiency ratio. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a wear-free circuit breaker closing and holding magnetic structure (without permanent magnets) according to the present invention;

[0024] Figure 2 This is a front view of the closing holding magnetic structure of a wear-free circuit breaker according to this utility model (without permanent magnets);

[0025] Figure 3 This is a side view of a wear-free circuit breaker closing holding magnetic structure according to the present invention;

[0026] Figure 4 This is a top view of a wear-free circuit breaker closing holding magnetic structure according to the present invention;

[0027] Figure 5 for Figure 4 Sectional view along the middle AA direction;

[0028] Figure 6 This is a cross-sectional view of a short-circuit component of a wear-free circuit breaker's closing holding magnetic structure according to this utility model.

[0029] Figure 7 This is a schematic diagram of the first state of the short-circuit component of this utility model;

[0030] Figure 8 This is a schematic diagram of the second state of the short-circuit component of this utility model;

[0031] In the figure, 10 is the stationary terminal; 101 is the first mounting hole; 102 is the first permanent magnet; 103 is the second mounting hole; 104 is the second permanent magnet; 105 is the receiving groove; 106 is the first through hole; 20 is the moving terminal; 201 is the groove; 202 is the second through hole; 203 is the connector; 204 is the vent; 30 is the short-circuit component; and 301 is the third through hole. Detailed Implementation

[0032] The following is combined with Figures 1 to 8 This utility model will be described in detail.

[0033] This embodiment provides a wear-free circuit breaker closing holding magnetic structure, such as... Figure 1As shown, the circuit breaker includes a stationary terminal 10 with at least two sets of mounting holes arranged axially from the inside out. Each set of mounting holes has a corresponding permanent magnet at one end, and the permanent magnets in adjacent sets of mounting holes are arranged with opposite magnetic poles. The circuit breaker also includes a moving terminal 20, with a groove 201 corresponding to a mounting hole on the side of the moving terminal 20 closest to the stationary terminal 10. After the circuit breaker closes via an electromagnetic or spring structure, the moving terminal 20 abuts against the stationary terminal 10. The side of the moving terminal 20 with the groove 201 contacts the side of the stationary terminal 10 away from the permanent magnets. The mounting holes and the openings of the grooves 201 are aligned and connected. Each permanent magnet forms a magnetic circuit, which closes around the corresponding groove 201 and mounting hole. The closed magnetic circuit enhances the magnetic force in a specific area. The holding force generated by the permanent magnets overcomes the closing reaction force and attracts the moving terminal 20 to the stationary terminal 10, thus keeping the moving terminal 20 in the closed position. By utilizing magnetic force to maintain the closed state, the manufacturing process is simplified, which helps reduce production costs and improves both the performance and economy of the circuit breaker. This embodiment includes two sets of mounting holes, and the permanent magnets form two sets of magnetic circuits with opposite directions. This dual-magnetic-circuit design allows for a smaller, more compact circuit breaker, and also reduces wear on mechanical components, increasing the mechanical life of the circuit breaker. In some embodiments, the permanent magnets can be designed with three or four magnetic circuits, in which case the number of mounting holes corresponds to the number of sets. Permanent magnets in the same set form a magnetic circuit with the same direction, and the magnetic poles of the permanent magnets in any two adjacent sets of mounting holes are set with opposite directions.

[0034] In this embodiment, as Figures 6 to 8 As shown, it also includes a short-circuit element 30. The short-circuit element 30 is movable on the side of the stationary terminal 10 where the permanent magnet is located, and the short-circuit element 30 has a third through hole 301 corresponding to the first through hole 106. Furthermore, the short-circuit element 30 has a ring structure, which can achieve the maximum volumetric efficiency ratio. In special circumstances where it is necessary to open the circuit, the short-circuit element 30 is pushed until it contacts the stationary terminal 10, so that the magnetic circuit of the permanent magnet cannot form a closed loop, and the moving terminal 20 moves away from the stationary terminal 10, thus completing the opening. The movement of the short-circuit element 30 can be achieved manually or electrically, and the movement of the short-circuit element 30 is controlled by setting a opening electromagnet.

[0035] In this embodiment, as Figures 2 to 5 As shown, the opening sizes of the groove 201 and the mounting hole are different to reduce magnetic leakage. The stationary terminal 10, away from the moving terminal 20, has several accommodating grooves 105 along its axial direction that are adapted to the permanent magnets. The accommodating grooves 105 communicate with the mounting hole, and the opening of the mounting hole is smaller than the opening of the accommodating groove 105, so that the permanent magnet placed in the accommodating groove 105 will not enter the mounting hole from the accommodating groove 105 and cause a short circuit. Different groups of permanent magnets can be set to different sizes, and each accommodating groove 105 and groove 201 is correspondingly set with its corresponding permanent magnet.

[0036] In this embodiment, the mounting holes in each group are arranged in a circular array relative to the central axis of the stationary terminal 10, such as... Figure 5 As shown, in this embodiment, the two sets of mounting holes are a first mounting hole 101 and a second mounting hole 103. The second mounting holes 103 are evenly distributed around the outer periphery of the first mounting holes 101. One end of the first mounting hole 101 is provided with a corresponding first permanent magnet 102, and one end of the second mounting hole 103 is provided with a corresponding second permanent magnet 104. The magnetic poles of the first permanent magnet 102 and the second permanent magnet 104 are arranged in opposite directions. Specifically, the side of the first permanent magnet 102 closest to the central axis of the stationary terminal 10 is the N pole, and the side away from the central axis of the stationary terminal 10 is the S pole. For the second permanent magnet 104 adjacent to this set of mounting holes, the side closest to the central axis of the stationary terminal 10 is the S pole, and the side away from the central axis of the stationary terminal 10 is the N pole. In some embodiments, the first permanent magnet 102 and the second permanent magnet 104 can be interchanged.

[0037] In this embodiment, the stationary terminal 10 has a first through hole 106 along its axial direction, and the moving terminal 20 has a corresponding second through hole 202. A guide rod can be inserted into the first through hole 106 and the second through hole 202 to achieve precise movement of the moving terminal 20. A connector 203 extends from the end face of the moving terminal 20 away from the stationary terminal 10, and a fixing hole (not shown in the figure) is provided on the connector 203. The moving terminal 20 also has an exhaust port 204 to facilitate heat dissipation inside the circuit breaker, especially under high load or long-term operation; good heat dissipation can extend the service life of the circuit breaker.

[0038] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A wear-free circuit breaker closing holding magnetic structure, characterized in that, include: A stationary terminal has at least two sets of mounting holes arranged radially from the inside out. One end of each set of mounting holes is provided with a permanent magnet, and the magnetic poles of the permanent magnets in adjacent sets of mounting holes are arranged in opposite directions. The moving terminal has several grooves on one side that correspond to the mounting holes of each group; When the side of the moving terminal with the groove contacts the stationary terminal, the groove communicates with the corresponding mounting hole, and each of the permanent magnets generates magnetic force to attract the moving terminal to the stationary terminal.

2. The wear-free circuit breaker closing holding magnetic structure as described in claim 1, characterized in that, Each of the mounting holes in each group is arranged in a circular array relative to the central axis of the stationary terminal.

3. The wear-free circuit breaker closing holding magnetic structure as described in claim 2, characterized in that, The stationary terminal is provided with a receiving groove along its axial direction that is adapted to the permanent magnet, and the opening size of the receiving groove is larger than the opening size of the mounting hole.

4. The wear-free circuit breaker closing holding magnetic structure as described in claim 3, characterized in that, The groove and the mounting hole have different opening sizes.

5. The wear-free circuit breaker closing holding magnetic structure as described in claim 4, characterized in that, The stationary terminal is provided with a first through hole along its axial direction, and the moving terminal is provided with a corresponding second through hole.

6. The wear-free circuit breaker closing holding magnetic structure as described in claim 5, characterized in that, It also includes a short-circuit device, which is disposed on the side of the stationary terminal where the permanent magnet is located.

7. The wear-free circuit breaker closing holding magnetic structure as described in claim 6, characterized in that, The short-circuit component is provided with a third through hole corresponding to the first through hole.

8. The wear-free circuit breaker closing holding magnetic structure as described in claim 7, characterized in that, The moving terminal has a connector extending from its end face away from the stationary terminal.

9. The wear-free circuit breaker closing holding magnetic structure as described in claim 8, characterized in that, The moving terminal is provided with an exhaust port along its axial direction.

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