A movable contact structure of a universal circuit breaker

Abstract

The utility model discloses a kind of universal circuit breaker movable contact structure, it includes: contact support, the contact support inside rotationally connected mounting shaft, the mounting shaft outside detachably connect multiple movable contact contact piece, mounting base groove is set in the mounting shaft inside, the mounting shaft inside slidingly connected limit insert plate, first special-shaped block is slidably connected in the mounting base groove inside, the first special-shaped block side surface is fixedly connected with limit insert plate side surface, second special-shaped block is slidably connected between the first special-shaped block other side surface and the inner wall of mounting base groove, the mounting shaft inside is threadedly connected bolt stem, the bolt stem one end is rotatably connected with second special-shaped block side surface, the mounting shaft one end is fixedly connected first limit plate, convenient for staff to remove mounting shaft and movable contact contact piece, greatly reduce dismounting difficulty, it is favorable to improve work efficiency and reduce contact spring installation difficulty, convenient for staff to dismount.

Description

Technical Field

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

[0002] Universal circuit breakers, as protective electrical devices at the power supply level, have functions such as overload, short circuit, phase loss, overvoltage, undervoltage, and grounding protection. They can protect circuits and electrical equipment from damage and are trusted and used by a wide range of power users.

[0003] During long-term use, the circuit breaker undergoes multiple opening and closing cycles, which can easily lead to damage to the contacts on the moving contact plates. This makes disassembly and recycling inconvenient for staff and reduces their disassembly efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a universal circuit breaker moving contact structure to solve the problem that it is inconvenient for workers to disassemble damaged moving contact pieces.

[0005] To achieve the above objectives, a universal circuit breaker moving contact structure is provided, comprising: a contact bracket, an internally rotatably connected mounting shaft, an externally detachably connected plurality of moving contact pieces, an internally formed mounting groove, an internally slidably connected limiting plate, an internally slidably connected first irregular block within the mounting groove, a side of the first irregular block being fixedly connected to the side of the limiting plate, a slidably connected second irregular block between the other side of the first irregular block and the inner wall of the mounting groove, an internally threaded bolt rod, one end of the bolt rod being rotatably connected to the side of the second irregular block, an internally fixedly connected first limiting plate, an externally detachably connected second limiting plate, a side of the second limiting plate being fitted with a limiting screw, one end of the limiting screw being threadedly connected to the internally formed mounting shaft, and the end of the limiting plate away from the first irregular block being inserted into the moving contact piece. This facilitates the removal of the mounting shaft and the moving contact piece by workers, greatly reducing disassembly difficulty and improving work efficiency. The contact bracket has a mounting groove on its side, and a spring limiting block is fitted inside the mounting groove. An auxiliary positioning block is fixedly connected to the side of the spring limiting block. The auxiliary positioning block is inserted into the inner wall of the mounting groove. A positioning insert is fixedly connected to the inner wall of the mounting groove. The positioning insert is inserted into the spring limiting block. Two fixing screws are inserted into the upper surface of the spring limiting block. The lower ends of the two fixing screws pass through the positioning insert, and the lower end of the positioning insert is threaded into the inside of the spring limiting block. This reduces the difficulty of installing the contact spring and facilitates disassembly and assembly by the operator.

[0006] According to the universal circuit breaker moving contact structure, the side of the spring limiting block is provided with mounting holes, and contact springs are inserted into the mounting holes. One end of the contact spring passes through the contact bracket and abuts against the side of the moving contact contact piece, which facilitates the insertion of the contact spring.

[0007] According to the universal circuit breaker moving contact structure, isolation rings are fixedly connected to both sides of the moving contact contact piece, and multiple moving contact contact pieces are installed side by side to facilitate maintaining a certain interval between the moving contact contact pieces and to facilitate the insertion of the upper contact head of the moving contact contact piece into the interval formed by the contact grid piece.

[0008] According to the universal circuit breaker moving contact structure, multiple contact grids are fixedly connected to the inner wall of the contact bracket, and a gap is left between two adjacent contact grids. The upper contact head of the moving contact piece is located within the gap formed by the contact grids, which can prevent the moving contact piece from moving axially.

[0009] According to the universal circuit breaker moving contact structure, the end of the limiting plate away from the first irregular block is arc-shaped, so as to match the curvature of the mounting shaft and increase the overall integrity of the device.

[0010] According to the universal circuit breaker moving contact structure, the cross-sections of the first irregular block and the second irregular block are both trapezoidal, and the mutual cooperation of the inclined surfaces of the first irregular block and the second irregular block facilitates the use of the second irregular block to push the first irregular block to move.

[0011] According to the universal circuit breaker moving contact structure, the longitudinal section of the mounting base groove is square, which facilitates the installation of the first irregular block and the second irregular block.

[0012] According to the universal circuit breaker moving contact structure, the side of the first limiting plate slides against the side of the contact bracket, and the side of the second limiting plate slides against the side of the contact bracket to prevent the mounting shaft from moving axially during rotation.

[0013] The above-mentioned solution has the following beneficial effects: 1. The first and second limiting plates prevent axial movement of the mounting shaft. The limiting screws facilitate the installation of the second limiting plate on the mounting shaft. Rotating the bolt rod facilitates the movement of the second irregular block. The inclined surface of the second irregular block cooperates with the inclined surface of the first irregular block, making it easy to use the second irregular block to push the first irregular block and the limiting plate to move. This makes it easier for workers to remove the mounting shaft and the moving contact plate, greatly reducing the difficulty of disassembly and improving work efficiency.

[0014] 2. The fixing screws facilitate the fixation of the spring limit block and the limiting of the contact spring. The auxiliary positioning plate facilitates the installation of the auxiliary spring limit block. The mounting holes facilitate the insertion and installation of the contact spring, reducing the difficulty of contact spring installation and making it easier for workers to disassemble and assemble.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a perspective view of the moving contact structure of a universal circuit breaker according to this utility model; Figure 2 This is a diagram showing the internal structure of the mounting shaft in the moving contact structure of a universal circuit breaker according to this utility model. Figure 3 This is a top sectional view of the mounting shaft in the moving contact structure of a universal circuit breaker according to this utility model. Figure 4 This is a side sectional view of the moving contact structure of a universal circuit breaker according to this utility model; Figure 5 This is a perspective view of the moving contact piece in the moving contact structure of a universal circuit breaker according to this utility model; Figure 6 This is a side view of the moving contact structure of a universal circuit breaker according to this utility model, with the moving contact piece removed.

[0017] Legend: 1. Contact bracket; 2. Moving contact plate; 3. Mounting shaft; 4. Mounting base groove; 5. Limiting plate; 6. First irregular block; 7. Second irregular block; 8. Bolt rod; 9. First limiting plate; 10. Second limiting plate; 11. Limiting screw; 12. Mounting groove; 13. Spring limiting block; 14. Auxiliary positioning block; 15. Positioning plate; 16. Fixing screw; 17. Mounting hole; 18. Contact spring; 19. Isolating ring; 20. Contact grid plate. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] Reference Figure 1-4This utility model discloses a universal circuit breaker moving contact structure, comprising: a contact bracket 1, a mounting shaft 3 rotatably connected inside the contact bracket 1 for mounting moving contact pieces 2, multiple moving contact pieces 2 detachably connected outside the mounting shaft 3, a mounting base groove 4 inside the mounting shaft 3 for providing a mounting foundation, a limiting plate 5 slidably connected inside the mounting shaft 3 for fixing the moving contact pieces 2, a first irregular block 6 slidably connected inside the mounting base groove 4, the first irregular block 6 sliding within the mounting base groove 4 via a slider and a sliding groove, a side of the first irregular block 6 fixedly connected to the side of the limiting plate 5, and a second irregular block 7 slidably connected between the other side of the first irregular block 6 and the inner wall of the mounting base groove 4 via a slider and a sliding groove. The internal sliding mechanism utilizes the engagement of the inclined surface of the second irregular block 7 with the inclined surface of the first irregular block 6. When the second irregular block 7 moves, it can push the first irregular block 6 to move. The mounting shaft 3 is internally threaded with a bolt rod 8, which is used to drive the second irregular block 7 to move. One end of the bolt rod 8 is rotatably connected to the side of the second irregular block 7. One end of the mounting shaft 3 is fixedly connected to the first limiting plate 9, and the other side of the mounting shaft 3 is detachably connected to the second limiting plate 10. The first limiting plate 9 and the second limiting plate 10 are used to prevent the mounting shaft 3 from moving axially. The side of the second limiting plate 10 is inserted with a limiting screw 11, which is used to install the second limiting plate 10 on the mounting shaft 3. One end of the limiting screw 11 is internally threaded with the mounting shaft 3. The end of the limiting insert plate 5 away from the first irregular block 6 is inserted into the interior of the moving contact piece 2. A mounting groove 12 is provided on the side of the contact bracket 1. A spring limiting block 13 is fitted inside the mounting groove 12. The spring limiting block 13 is used to provide an elastic base for the contact spring 18. An auxiliary positioning block 14 is fixedly connected to the side of the spring limiting block 13 to assist in the installation and positioning of the spring limiting block 13. The auxiliary positioning block 14 is inserted into the inner wall of the mounting groove 12. A positioning insert plate 15 is fixedly connected to the inner wall of the mounting groove 12. The positioning insert plate 15 is inserted into the inside of the spring limiting block 13. Two fixing screws 16 are inserted into the upper surface of the spring limiting block 13 to fix the spring limiting block 13. The lower ends of the two fixing screws 16 pass through the positioning insert plate 15, and the lower end of the positioning insert plate 15 is threadedly connected to the inside of the spring limiting block 13.

[0020] Reference Figure 1-3 Multiple moving contact pieces 2 are installed side by side. The end of the limiting plate 5 away from the first irregular block 6 is arc-shaped, so that the end of the limiting plate 5 extending to the outside of the mounting shaft 3 matches the curvature of the mounting shaft 3. The cross-sections of the first irregular block 6 and the second irregular block 7 are both trapezoidal. The longitudinal section of the mounting base groove 4 is square. The side of the first limiting plate 9 slides against the side of the contact bracket 1, and the side of the second limiting plate 10 slides against the side of the contact bracket 1 to prevent the mounting shaft 3 from moving axially.

[0021] Reference Figure 4-6The spring limiting block 13 has a mounting hole 17 on its side for inserting a contact spring 18. The mounting hole 17 is filled with a contact spring 18. One end of the contact spring 18 passes through the contact bracket 1 and abuts against the side of the moving contact piece 2. Isolation rings 19 are fixedly connected to both sides of the moving contact piece 2 to ensure that the moving contact piece 2 is fitted. Multiple contact grids 20 are fixedly connected to the inner wall of the contact bracket 1. There is a gap between two adjacent contact grids 20 to prevent the axial movement of the moving contact piece 2. The upper contact head of the moving contact piece 2 is located within the gap formed by the contact grids 20.

[0022] Working principle: When the moving contact piece 2 is damaged due to long-term use, the operator can remove the limiting screw 11 to remove the second limiting plate 10. Then, the bolt rod 8 is rotated counterclockwise to move the second irregular block 7, thereby releasing the second irregular block 7 from limiting the first irregular block 6 and the limiting plate 5. Then, the operator can push the limiting plate 5 to retract, making it easier for the operator to remove the mounting shaft 3 and the moving contact piece 2, reducing the difficulty of disassembly and improving work efficiency. When installing the contact spring 18, the operator can first insert the contact spring 18 into the mounting hole 17, and then pass multiple contact springs 18 through the through hole opened on the contact bracket 1, so that one end of the contact spring 18 contacts the side of the moving contact piece 2, reducing the difficulty of installing the contact spring 18 and making it easier for the operator to disassemble and assemble.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A universal circuit breaker moving contact structure, comprising: A contact support (1) is characterized in that a mounting shaft (3) is rotatably connected inside the contact support (1), and multiple movable contact pieces (2) are detachably connected to the outside of the mounting shaft (3). A mounting base groove (4) is formed inside the mounting shaft (3), and a limiting plate (5) is slidably connected inside the mounting shaft (3). A first irregular block (6) is slidably connected inside the mounting base groove (4). The side of the first irregular block (6) is fixedly connected to the side of the limiting plate (5), and the other side of the first irregular block (6) is slidably connected to the inner wall of the mounting base groove (4) with a second irregular block (6). The second irregular block (7) is connected to the inner thread of the mounting shaft (3) by a bolt rod (8). One end of the bolt rod (8) is rotatably connected to the side of the second irregular block (7). One end of the mounting shaft (3) is fixedly connected to the first limiting plate (9). The other side of the mounting shaft (3) is detachably connected to the second limiting plate (10). The side of the second limiting plate (10) is inserted with a limiting screw (11). One end of the limiting screw (11) is threadedly connected to the inner thread of the mounting shaft (3). The end of the limiting insert plate (5) away from the first irregular block (6) is inserted into the inside of the moving contact piece (2). The contact bracket (1) has an installation groove (12) on its side. A spring limiting block (13) is fitted inside the installation groove (12). An auxiliary positioning block (14) is fixedly connected to the side of the spring limiting block (13). The auxiliary positioning block (14) is inserted into the inner wall of the installation groove (12). A positioning insert (15) is fixedly connected to the inner wall of the installation groove (12). The positioning insert (15) is inserted into the spring limiting block (13). Two fixing screws (16) are inserted into the upper surface of the spring limiting block (13). The lower ends of the two fixing screws (16) penetrate the positioning insert (15), and the lower end of the positioning insert (15) is threadedly connected to the inside of the spring limiting block (13).

2. The universal circuit breaker moving contact structure according to claim 1, characterized in that, The spring limiting block (13) has a mounting hole (17) on its side. A contact spring (18) is inserted into the mounting hole (17). One end of the contact spring (18) passes through the contact bracket (1) and abuts against the side of the moving contact piece (2).

3. The universal circuit breaker moving contact structure according to claim 1, characterized in that, The moving contact piece (2) has isolation rings (19) fixedly connected to both sides, and multiple moving contact pieces (2) are installed side by side.

4. The universal circuit breaker moving contact structure according to claim 1, characterized in that, Multiple contact grids (20) are fixedly connected to the inner wall of the contact bracket (1). There is a gap between two adjacent contact grids (20), and the upper contact head of the moving contact piece (2) is located within the gap formed by the contact grids (20).

5. The universal circuit breaker moving contact structure according to claim 1, characterized in that, The end of the limiting plate (5) away from the first irregular block (6) is arc-shaped.

6. The universal circuit breaker moving contact structure according to claim 1, characterized in that, Both the first irregular block (6) and the second irregular block (7) have trapezoidal cross sections.

7. The universal circuit breaker moving contact structure according to claim 1, characterized in that, The longitudinal section of the mounting base trench (4) is square.

8. The universal circuit breaker moving contact structure according to claim 1, characterized in that, The side of the first limiting plate (9) slides against the side of the contact bracket (1), and the side of the second limiting plate (10) slides against the side of the contact bracket (1).

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