Improved structure of a circuit breaker movable contact

Abstract

The utility model discloses a circuit breaker movable contact improvement structure, including the casing, the top fixedly connected with fixed top plate of casing, the lateral wall fixedly connected with connecting block of fixed top plate, the fixedly connected with rotary rod on the casing, the outer wall of rotary rod is equipped with the rotary plate of rotation connection with it, a plurality of conductive parts are collectively fixedly connected with L type board, the lateral wall fixedly connected with contact of L type board, the top fixedly connected with a plurality of vertical column of rotary board, and the one end of each vertical column is close to connecting block and is fixedly connected with side post, and the one end of connecting block is close to vertical column and is provided with a plurality of with recess, and the elastic mechanism is equipped between every recess and corresponding vertical column respectively. The utility model discloses through the cooperation design of elastic mechanism and corresponding component, makes elastic component convenient switching among different installation positions, realizes the flexible adjustment of elastic parameter, satisfies different use needs.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an improved structure for the moving contact of a circuit breaker. Background Technology

[0002] In low-voltage power distribution systems, circuit breakers are core protection components, and the stability and adaptability of their moving contact structure directly affect the reliability of circuit switching.

[0003] In the prior art, the elastic support components (such as springs) of the moving contact are mostly fixed, and the spring force parameters are fixed at the factory. They cannot be dynamically adjusted according to different operating conditions (such as different rated currents and the degree of wear of contact materials). When the contact wears out after long-term use or the system load changes, the fixed spring force can easily lead to insufficient or excessive contact pressure, which in turn can cause problems such as increased contact resistance, contact erosion or mechanical fatigue. To solve the above problems, this application proposes an improved structure for the moving contact of a circuit breaker. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an improved structure for the moving contact of a circuit breaker. Through the coordinated design of the elastic mechanism and corresponding components, the elastic component can be easily switched between different installation positions, realizing flexible adjustment of the elastic parameters to meet different usage needs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An improved structure for a circuit breaker moving contact includes a housing. A fixed top plate is fixedly connected to the top of the housing. A connecting block is fixedly connected to the side wall of the fixed top plate. A rotating rod is fixedly connected to the housing. A rotating plate is rotatably connected to the outer wall of the rotating rod. Multiple conductive elements are fixedly connected to the bottom of the rotating plate. An L-shaped plate is fixedly connected to the multiple conductive elements. A contact is fixedly connected to the side wall of the L-shaped plate. Multiple vertical columns are fixedly connected to the top of the rotating plate. A side column is fixedly connected to the end of each vertical column near the connecting block. Multiple grooves are formed at the end of the connecting block near the vertical column. Each groove is provided with a spring mechanism between itself and its corresponding vertical column.

[0006] Preferably, the elastic mechanism includes a fixed post fixedly connected to the inner wall of the groove, two connecting posts fixedly connected to the outer wall of the fixed post, a spring sleeved on the outer wall of the side post, the spring sleeved on the outer wall of the fixed post, and the two connecting posts inserted into the gap of the spring.

[0007] Preferably, both the fixed top plate and the connecting block have two mating through holes, and the two through holes are threaded together with bolts.

[0008] Preferably, the number of the conductive element, the vertical column, and the groove is set to three, and the plurality of the conductive element, the vertical column, and the groove are distributed at equal intervals.

[0009] Preferably, the contact is located in the middle of the L-shaped plate, and the L-shaped plate and the contact are fixed together by a plurality of fixing screws.

[0010] Preferably, both connecting posts are fixedly connected to the inner wall of the groove, and the plurality of fixed posts and connecting posts are distributed at equal intervals.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. Through the coordinated design of the elastic mechanism and corresponding components, the elastic component can be easily switched between different installation positions, realizing flexible adjustment of the elastic force parameters. This design can adapt to different rated currents, wear levels of contact materials, and other working conditions, avoiding problems such as insufficient or excessive contact pressure caused by fixed elastic force, and reducing the occurrence of increased contact resistance, contact erosion, and mechanical fatigue.

[0012] 2. The spring mechanism adopts a detachable engagement method. When it is necessary to replace the spring component or adjust the spring force, it is not necessary to completely disassemble the moving contact assembly and circuit breaker housing. Only the spring component needs to be operated, which simplifies the maintenance steps, saves maintenance time and labor costs, and meets the needs of rapid maintenance.

[0013] 3. The conductive components and elastic support components are arranged with equal spacing, which can make the contacts evenly stressed during the opening and closing process, avoid contact skew, ensure stable contact area, reduce local arc concentration, and improve conductivity and service life.

[0014] In summary, through the coordinated design of the elastic mechanism and corresponding components, the elastic components can be easily switched between different installation positions, enabling flexible adjustment of the elastic parameters to meet different usage needs. Attached Figure Description

[0015] Figure 1 This is a first structural schematic diagram of an improved structure for the moving contact of a circuit breaker proposed in this utility model; Figure 2 This is a second structural schematic diagram of an improved structure for the moving contact of a circuit breaker proposed in this utility model; Figure 3 This is a partial structural diagram of an improved moving contact structure for a circuit breaker proposed in this utility model.

[0016] In the diagram: 1. Housing, 2. Fixed top plate, 3. Connecting block, 4. Rotating rod, 5. Rotating plate, 6. Conductive component, 7. L-shaped plate, 8. Contact, 9. Vertical column, 10. Side column, 11. Spring, 12. Fixed column, 13. Connecting column, 14. Groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figures 1-3 An improved structure for the moving contact of a circuit breaker includes a housing 1, which supports other components. A fixed top plate 2 is fixedly connected to the top of the housing 1, providing a mounting base for a connecting block 3. The connecting block 3 is fixedly connected to the side wall of the fixed top plate 2. Both the fixed top plate 2 and the connecting block 3 have two mating through holes, which are threaded together with bolts for fastening the fixed top plate 2 and the connecting block 3. A rotating rod 4 is fixedly connected to the housing 1, providing rotation support for a rotating plate 5. The outer wall of the rotating rod 4 is fitted with a rotating plate 5 that is rotatably connected to it. The rotating plate 5 can rotate around the rotating rod 4. Multiple conductive parts 6 are fixedly connected to the bottom of the rotating plate 5. The multiple conductive parts 6 are fixedly connected to an L-shaped plate 7. A contact 8 is fixedly connected to the side wall of the L-shaped plate 7. The contact 8 is used to contact external conductive parts. The contact 8 is located in the middle of the L-shaped plate 7 so that the contact 8 is evenly stressed. The L-shaped plate 7 and the contact 8 are installed and fixed by multiple fixing screws. The fixing screws ensure that the contact 8 is stably installed on the L-shaped plate 7.

[0019] Multiple vertical columns 9 are fixedly connected to the top of the rotating plate 5. The vertical columns 9 rotate together with the rotating plate 5. Each vertical column 9 has a side column 10 fixedly connected to one end near the connecting block 3. The side column 10 is used to cooperate with the elastic mechanism. Multiple grooves 14 are opened on one end of the connecting block 3 near the vertical column 9. The grooves 14 provide installation space for the elastic mechanism. The number of conductive parts 6, vertical columns 9 and grooves 14 is set to three. The multiple conductive parts 6, vertical columns 9 and grooves 14 are distributed at equal intervals to ensure structural force balance. Each groove 14 is provided with an elastic mechanism between it and its corresponding vertical column 9. The elastic mechanism is used to provide elastic force. The elastic mechanism includes a fixed column fixedly connected to the inner wall of the groove 14. 12. The fixed column 12 provides mounting support for the spring 11. Two connecting columns 13 are fixedly connected to the outer wall of the fixed column 12. The connecting columns 13 are used to position the spring 11. Both connecting columns 13 are fixedly connected to the inner wall of the groove 14. Multiple fixed columns 12 and connecting columns 13 are distributed at equal intervals. The outer wall of the side column 10 is fitted with the spring 11. The spring 11 is fitted on the outer wall of the fixed column 12. The two connecting columns 13 are inserted into the gap of the spring 11. Both ends of the spring 11 are provided with ends. One end is fitted on the fixed column 12 and the spring 11 is rotated so that the gap of the spring 11 is located at both ends of the two connecting columns 13, thus limiting the spring 11 and preventing the spring 11 from falling off.

[0020] When using this invention, the operator holds the spring 11 and rotates it to move the two connecting posts 13 in the gap between the spring 11, causing the spring 11 to disengage from the fixed post 12 and the connecting post 13. The spring 11 is then placed on another fixed post 12. The operator then holds the spring 11 again and rotates it to position the connecting post 13 in the gap between the spring 11, preventing the spring 11 from disengaging and ensuring a stable connection. Furthermore, by connecting the spring 11 to different fixed posts 12, the elastic force can be adjusted to meet different usage needs.

Claims

1. An improved structure for the moving contact of a circuit breaker, comprising a housing (1), characterized in that, A fixed top plate (2) is fixedly connected to the top of the housing (1), and a connecting block (3) is fixedly connected to the side wall of the fixed top plate (2). A rotating rod (4) is fixedly connected to the housing (1), and a rotating plate (5) is fitted on the outer wall of the rotating rod (4) and rotated thereto. A plurality of conductive elements (6) are fixedly connected to the bottom of the rotating plate (5), and an L-shaped plate (7) is fixedly connected to the plurality of conductive elements (6). A contact (8) is fixedly connected to the side wall of the L-shaped plate (7), and a plurality of vertical columns (9) are fixedly connected to the top of the rotating plate (5). Each vertical column (9) is close to the connecting block ( 3) One end of each of the connecting blocks is fixedly connected to a side column (10). The end of the connecting block (3) near the vertical column (9) is provided with multiple grooves (14). Each groove (14) is provided with an elastic mechanism between it and its corresponding vertical column (9). The elastic mechanism includes a fixed column (12) fixedly connected to the inner wall of the groove (14). The outer wall of the fixed column (12) is fixedly connected to two connecting columns (13). The outer wall of the side column (10) is fitted with a spring (11). The spring (11) is fitted on the outer wall of the fixed column (12). The two connecting columns (13) are inserted into the gap of the spring (11).

2. The improved structure of the moving contact of a circuit breaker according to claim 1, characterized in that, Both the fixed top plate (2) and the connecting block (3) have two matching through holes, and the two through holes are threaded together with bolts.

3. The improved structure of the moving contact of a circuit breaker according to claim 1, characterized in that, The number of the conductive element (6), the vertical column (9), and the groove (14) is set to three, and the multiple conductive elements (6), the vertical column (9), and the groove (14) are distributed at equal intervals.

4. The improved structure of the moving contact of a circuit breaker according to claim 1, characterized in that, The contact (8) is located in the middle of the L-shaped plate (7), and the L-shaped plate (7) and the contact (8) are fixed together by a number of fixing screws.

5. The improved structure of the moving contact of a circuit breaker according to claim 1, characterized in that, Both of the connecting posts (13) are fixedly connected to the inner wall of the groove (14), and the multiple fixed posts (12) and connecting posts (13) are distributed at equal intervals.

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