Terminal protective cover structure of molded case circuit breaker

Abstract

The utility model discloses a terminal protective cover structure of a molded case circuit breaker, which comprises a wiring frame, a wiring groove arranged in the wiring frame and a screwing piece arranged on the wiring frame, and a protective cover is arranged on the wiring frame at a position corresponding to the screwing piece. The protective cover comprises a mounting part which is positioned and mounted at the top of the wiring frame, a heat dissipation plate which is arranged on the mounting part and is positioned on the rear side of the screwing piece, and a cover part which is arranged on the mounting part and covers the screwing piece, and exhaust holes are formed in the heat dissipation plate. According to the utility model, the structure design is reasonable, and the protection cover is arranged, so that small electric arcs or high-temperature gas coming out of the exhaust hole can be prevented from damaging the screwing piece, the service life of the screwing piece is prolonged, and the screwing piece is ensured to stably press a cable in the wiring groove.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and more specifically, to a terminal protective cover structure for a molded case circuit breaker. Background Technology

[0002] The prior art CN217822629U discloses a terminal block and a circuit breaker. The wiring groove on the terminal block is used to accommodate conductive connectors. The baffle on the terminal block can effectively prevent conductive connectors from being inserted into the gap between the terminal block and the circuit breaker housing, thereby avoiding wiring errors. The insulating component is slidably connected to the baffle, and the sliding grooves at opposite ends of the insulating component can wrap around the baffle, effectively providing insulation and good protection against electric shock, thus improving the safety performance of the circuit breaker during installation and use. Furthermore, the sliding grooves on both sides of the insulating component can limit the lateral sway of the baffle, and the connection between the first and second locking components can prevent the baffle from detaching from the insulating component in the longitudinal direction.

[0003] The terminals in the above structure do not provide protection for the wiring screws. The small electric arcs coming out of the arc-extinguishing chamber can damage the wiring screws when they are discharged, affecting their service life. Utility Model Content

[0004] This utility model overcomes the shortcomings of the prior art. Its structure is reasonably designed. By setting a protective cover, it can prevent damage to the tightening parts caused by small electric arcs or high-temperature gases coming out of the exhaust hole, thereby improving the service life of the tightening parts and ensuring that the tightening parts firmly press the cables in the wiring slots.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A terminal protection cover structure for a molded case circuit breaker includes a wiring frame, a wiring groove disposed in the wiring frame, and a tightening member disposed on the wiring frame. A protective cover is disposed on the wiring frame corresponding to the position of the tightening member. The protective cover includes a mounting part positioned and installed on the top of the wiring frame, a heat dissipation plate disposed on the mounting part and located behind the tightening member, and a cover part disposed on the mounting part and covering the tightening member. The heat dissipation plate is provided with vent holes.

[0007] By adopting the technical scheme, during the use of the molded case circuit breaker product, the small arc or high-temperature gas after cutting in the arc extinguishing chamber is discharged from the exhaust hole, and the exhaust hole is usually not directly opposite the position of the terminal slot, because there is a cable in the terminal slot, so the exhaust hole is usually arranged above the terminal frame, and the existing technology usually does not protect the fastening part (i.e., the terminal screw). The protective cover is positioned and installed on the terminal frame through the mounting part, at this time, the cover part covers and protects the fastening part, effectively preventing the small arc or high-temperature gas from the exhaust hole from damaging the fastening part, thereby prolonging the service life of the fastening part and ensuring that the fastening part tightly presses the cable in the terminal slot.

[0008] Preferably, the cover part covers the top surface and the four side surfaces of the fastening part, or the cover part covers the four side surfaces of the fastening part, or the cover part covers the back surface of the fastening part, or the cover part covers the back surface and the left and right side surfaces of the fastening part.

[0009] By adopting the technical scheme, the four side surfaces of the fastening part, i.e., the front side, the back side, the left side, and the right side, wherein the side of the fastening part close to the arc extinguishing chamber is the back side, and the back side of the terminal frame below refers to the side of the terminal frame close to the arc extinguishing chamber. When the cover part covers the top surface and the four side surfaces of the fastening part, the cover part needs to be disassembled when the fastening part needs to be disassembled for maintenance of the molded case circuit breaker. In the specific embodiment, the cover part covers the back surface and the left and right side surfaces of the fastening part, which can effectively protect the fastening part and facilitate disassembly and assembly of the fastening part.

[0010] Preferably, the exhaust hole is arranged corresponding to the fastening part, and the exhaust hole is arranged in multiple, and the multiple exhaust holes are arranged in a spaced manner.

[0011] By adopting the technical scheme, the arrangement can facilitate the discharge of the small arc or high-temperature gas from the exhaust hole.

[0012] Preferably, the lower direction of the heat dissipation plate extends to be provided with a connecting plate, the connecting plate is located at the back side of the terminal frame, and the connecting plate fully or partially blocks the terminal slot; one side of the terminal frame is provided with the arc extinguishing chamber, the heat dissipation plate and the connecting plate are located between the arc extinguishing chamber and the terminal frame, the arc extinguishing chamber comprises a mounting bottom block, the connecting plate is provided with a connecting section that is connected to the mounting bottom block, and the mounting bottom block and the connecting plate form full blocking of the terminal slot.

[0013] By adopting the above technical solution, the connecting plate and connecting section are designed to align with the mounting base of the arc-extinguishing chamber during the installation of the protective cover, thus ensuring the accuracy and stability of the protective cover installation. Furthermore, the connecting plate, or a combination of the connecting plate and the mounting base, completely shields the wiring trough, preventing small electric arcs or high-temperature gases from entering the wiring trough and affecting the cables, further ensuring safety.

[0014] Preferably, the mounting part, cover part, heat sink and connecting part are integrally formed.

[0015] By adopting the above technical solution, the cover part can be manufactured as a single piece, which facilitates production and increases the overall strength of the cover part. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model;

[0017] Fig. 2 This is a schematic diagram illustrating the structure of the protective cover in a specific embodiment of this utility model.

[0018] In the diagram: 1. Wiring frame; 11. Wiring groove; 12. Tightening component; 2. Protective cover; 21. Mounting part; 22. Heat sink; 23. Cover part; 24. Vent hole; 25. Connecting plate; 26. Connecting section; 3. Arc extinguishing chamber; 31. Mounting base block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figs. 1-2 As shown, a terminal protective cover structure for a molded case circuit breaker includes a wiring frame 1, a wiring groove 11 disposed in the wiring frame 1, and a tightening member 12 disposed on the wiring frame 1. A protective cover 2 is disposed on the wiring frame 1 corresponding to the position of the tightening member 12. The protective cover 2 includes a mounting part 21 positioned and installed on the top of the wiring frame 1, a heat dissipation plate 22 disposed on the mounting part 21 and located behind the tightening member 12, and a cover part 23 disposed on the mounting part 21 and covering the tightening member 12. An exhaust hole 24 is provided on the heat dissipation plate 22.

[0021] By adopting the above technical scheme, during the use of the molded case circuit breaker product, the fine arc or high-temperature gas after cutting in the arc extinguishing chamber 3 is discharged from the exhaust hole 24, and the exhaust hole 24 generally does not face the position of the terminal slot 11, because there will be a cable in the terminal slot 11, so the exhaust hole 24 is usually arranged at the upper position of the terminal frame 1, and the existing technology generally does not protect the tightening member 12 (i.e. the terminal screw). The protective cover 2 is positioned and installed on the terminal frame 1 through the mounting part 21, at this time, the cover part 23 will cover and protect the tightening member 12, effectively preventing the fine arc or high-temperature gas from the exhaust hole 24 from damaging the tightening member 12, thereby prolonging the service life of the tightening member 12 and ensuring that the tightening member 12 tightly presses the cable in the terminal slot 11.

[0022] Among them, the cover part 23 covers the top surface and the four side surfaces of the tightening member 12, or the cover part 23 covers the four side surfaces of the tightening member 12, or the cover part 23 covers the back surface of the tightening member 12, or the cover part 23 covers the back surface and the left and right two side surfaces of the tightening member 12. The four side surfaces of the tightening member 12 are the front side, the back side, the left side and the right side, wherein the side of the tightening member 12 close to the arc extinguishing chamber 3 is the back side, and the back side of the terminal frame 1 below refers to the side of the terminal frame 1 close to the arc extinguishing chamber 3. Among them, when the cover part 23 covers the top surface and the four side surfaces of the tightening member 12, the cover part 23 needs to be disassembled when the tightening member 12 needs to be disassembled for maintenance of the molded case circuit breaker. In the specific embodiment, the cover part 23 that covers the back side and the left and right two side surfaces of the tightening member 12 can play a good protection role and facilitate the disassembly and assembly of the tightening member 12.

[0023] Moreover, the exhaust hole 24 is arranged corresponding to the tightening member 12, and the exhaust hole 24 is provided with a plurality of exhaust holes 24 arranged in intervals. In this way, the fine arc or high-temperature gas can be more conveniently discharged from the exhaust hole 24.

[0024] And, the lower direction of the heat dissipation plate 22 is provided with a connecting plate 25, the connecting plate 25 is located at the rear side of the terminal block 1, the connecting plate 25 covers all or part of the terminal slot 11; One side of the terminal block 1 is provided with an arc-extinguishing chamber 3, the heat dissipation plate 22 and the connecting plate 25 are located between the arc-extinguishing chamber 3 and the terminal block 1, the arc-extinguishing chamber 3 comprises a mounting bottom block 31, the connecting plate 25 is provided with a connecting section 26 which is connected with the mounting bottom block 31, the mounting bottom block 31 and the connecting plate 25 constitute the complete cover of the terminal slot 11. The connecting plate 25 and the connecting section 26 are connected with the mounting bottom block 31 of the arc-extinguishing chamber 3 when the protective cover 2 is installed, so as to ensure the installation accuracy and stability of the protective cover 2. Moreover, the connecting plate 25 or the combination of the connecting plate 25 and the mounting bottom block 31 can completely cover the terminal slot 11, so as to prevent the small arc or high-temperature gas from entering the terminal slot 11 and affecting the cable, and further ensure the safety.

[0025] In addition, the mounting portion 21, the cover portion 23, the heat dissipation plate 22 and the connecting portion are integrally formed. In this way, the cover portion 23 can be integrally formed, which is convenient for production and manufacturing and increases the overall strength of the cover portion 23.

[0026] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A terminal guard structure of a molded case circuit breaker comprising a terminal frame (1), a terminal slot (11) provided in the terminal frame (1), and a screw member (12) provided on the terminal frame (1), characterized in that, A protective cover (2) is arranged on the wiring frame (1) corresponding to the position of the screwing part (12), the protective cover (2) comprises a mounting part (21) positioned and mounted on the top of the wiring frame (1), a heat dissipation plate (22) arranged on the mounting part (21) and located at the rear side of the screwing part (12), and a cover part (23) arranged on the mounting part (21) and covering the screwing part (12), and the heat dissipation plate (22) is provided with exhaust holes (24).

2. The terminal shield structure of a molded case circuit breaker according to claim 1, wherein The cover part (23) covers the top surface and four side surfaces of the screwing part (12).

3. The terminal shield structure of a molded case circuit breaker according to claim 1, wherein The cover part (23) covers the four side surfaces of the screwing part (12).

4. The terminal guard structure of a molded case circuit breaker according to claim 1, wherein The cover part (23) covers the rear surface of the screwing part (12).

5. The terminal shield structure of a molded case circuit breaker according to claim 1, wherein The cover part (23) covers the rear surface and the left and right two side surfaces of the screwing part (12).

6. The terminal shield structure of a molded case circuit breaker according to claim 1 or 2 or 3 or 4 or 5, wherein The exhaust holes (24) are arranged corresponding to the screwing part (12), the exhaust holes (24) are provided with a plurality of exhaust holes (24), and the plurality of exhaust holes (24) are arranged in a spaced manner.

7. The terminal shield structure of a molded case circuit breaker according to claim 6, wherein The lower end of the heat dissipation plate (22) is provided with a connecting plate (25), the connecting plate (25) is located at the rear side of the wiring frame (1), and the connecting plate (25) covers all or part of the wiring slot (11).

8. The terminal shield structure of a molded case circuit breaker according to claim 7, wherein One side of the wiring frame (1) is provided with an arc extinguishing chamber (3), the heat dissipation plate (22) and the connecting plate (25) are located between the arc extinguishing chamber (3) and the wiring frame (1), the arc extinguishing chamber (3) comprises a mounting bottom block (31), the connecting plate (25) is provided with a connecting section (26) which is connected with the mounting bottom block (31), and the mounting bottom block (31) and the connecting plate (25) constitute the complete cover of the wiring slot (11).

9. The terminal shield structure of a molded case circuit breaker according to claim 8, wherein The mounting part (21), the cover part (23), the heat dissipation plate (22) and the connecting part are integrally formed.

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