A branching mechanism of plug-in circuit breaker and circuit breaker

Abstract

The present invention relates to a wire splitting mechanism and a circuit breaker of a plug-in circuit breaker, wherein the wire splitting mechanism comprises a vertical plate, the top of the vertical plate is connected to the inner wall of the top surface of a shell, one side of the vertical plate and the side wall of the shell are arranged to form a wire management groove, the wires connected to the bimetallic component and the wires connected to the incoming terminal are passed through the wire management groove, the other side of the vertical plate is provided with a slide groove, one end of the tripping rod is located in the slide groove, and the other end is connected to an operating mechanism. Compared with the prior art, the present invention isolates the wire and the tripping rod by arranging a wire splitting mechanism in the shell, so that the tripping rod and the wire are respectively located on both sides of the vertical plate to prevent them from interfering with each other, thereby significantly improving the stability of the working state.

Description

Technical Field

[0001] The invention relates to the field of circuit breakers, and in particular to a branching mechanism of a plug-in circuit breaker and a circuit breaker. Background Art

[0002] An overload protection mechanism is usually provided in the circuit breaker. The overload protection mechanism is generally composed of a bimetallic strip, a connecting strip and an arc-starting strip. Through the design of its structural shape, it plays the role of controlling the circuit breaker to open when overloaded, thereby protecting the circuit. For example, the Chinese utility model with application number 202020723060.7 discloses an overload protection mechanism for a plug-in circuit breaker. When the overload protection mechanism is working, the bimetallic strip is required to drive the trip rod to move, and the trip rod drives the operating mechanism to work, thereby achieving overload protection. In the existing structure, one end of the trip rod is usually fixed by a slide groove provided on the side wall of the shell, and the other end is connected to the operating mechanism. Therefore, the following problems are prone to occur: the trip rod interferes with the wires in the circuit breaker during the sliding process, thereby affecting the movement of the trip rod, resulting in reduced working stability of the overload protection mechanism. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a plug-in circuit breaker branching mechanism and a circuit breaker for isolating the wires and the trip rod in the circuit breaker and improving the working stability when the trip rod moves.

[0004] A branching mechanism for a plug-in circuit breaker, the plug-in circuit breaker comprises a shell, an incoming line terminal, a bimetallic component and an operating mechanism, wherein the incoming line terminal, the bimetallic component and the operating mechanism are all located in the shell, wherein the incoming line terminal is located at the rear end of the shell, the bimetallic component is located at the front side of the incoming line terminal, and the operating mechanism is located at the front side of the bimetallic component. The branching mechanism comprises a vertical plate, the top end of the vertical plate is connected to the inner wall of the top surface of the shell, one side surface of the vertical plate and the side wall of the shell are spaced apart to form a wire management groove, the wires connected to the bimetallic component and the wires connected to the incoming line terminal both pass through the wire management groove, the other side surface of the vertical plate is provided with a slide groove, one end of the tripping rod is located in the slide groove, and the other end is connected to the operating mechanism.

[0005] Furthermore, the line dividing mechanism also includes a horizontal plate, and the horizontal plate and the vertical plate form an L shape. The top surface of the horizontal plate is connected to the top inner wall of the shell and is located above the line management groove.

[0006] Furthermore, a slot is provided in the shell, and the end of the horizontal plate is inserted into the slot so that the branching mechanism is connected to the shell.

[0007] Furthermore, the horizontal plate and the slot are connected by interference fit.

[0008] Furthermore, the slide groove is a hollow groove penetrating the vertical plate.

[0009] Furthermore, the bimetallic component includes a bimetallic strip and an arc-starting strip, and the wire connected to one end of the bimetallic strip passes through a wire management groove.

[0010] Furthermore, the arc-starting piece is provided with a wing plate for connecting to a slot on the shell for fixation.

[0011] Furthermore, the wing plates are symmetrically located on both sides of the arc-starting piece.

[0012] Furthermore, the incoming terminal includes a terminal portion and an extension piece that are connected to each other. The extension piece is arranged close to the inner wall of the top surface of the shell, and the wire connected to one end of the extension piece passes through the wire management groove.

[0013] A plug-in circuit breaker is provided with a line dividing mechanism of any plug-in circuit breaker as described above.

[0014] The purpose of the present invention can be achieved by the following technical solutions:

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention isolates the wire and the tripping rod by arranging a branching mechanism in the housing, so that the tripping rod and the wire are respectively located on both sides of the vertical plate to prevent them from interfering with each other, thereby significantly improving the stability of the working state.

[0017] 2. The branching mechanism can be set to L-shape to improve the strength of its body.

[0018] 3. The branching mechanism can be integrated with the shell, or it can be split and connected through slot interference fit. It is easy to produce and process, and you can freely choose whether to install the branching mechanism according to the actual use situation. It has wide applicability and flexible use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of embodiment 1.

[0020] Figure 2 This is a schematic diagram of the structure of the first embodiment after the shell is hidden.

[0021] Figure 3 This is a schematic diagram of the shell structure of Example 3.

[0022] Figure numerals: 1. branching mechanism, 11. vertical plate, 12. horizontal plate, 13. cable management groove, 14. slide groove, 2. shell, 21. slot, 3. incoming terminal, 31. terminal part, 32. extension plate, 4. bimetallic component, 41. bimetallic sheet, 42. arc starting sheet, 43. wing plate, 5. trip rod. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0024] Embodiment 1

[0025] like Figure 1 As shown, this embodiment provides a branching mechanism of a plug-in circuit breaker, which is installed in a plug-in circuit breaker. The plug-in circuit breaker includes a housing 2, an incoming terminal 3, a double metal component 4 and an operating mechanism. The incoming terminal 3, the double metal component 4 and the operating mechanism are all located in the housing 2, wherein the incoming terminal 3 is located at the tail end of the housing 2, the double metal component 4 is located at the front side of the incoming terminal 3, and the operating mechanism (not shown in the figure) is located at the front side of the double metal component 4. The branching mechanism 1 is an L-shaped block composed of a vertical plate 11 and a horizontal plate 12. One side of the vertical plate 11 and the side wall of the housing 2 are spaced to form a wire management groove 13, and the top surface of the horizontal plate 12 is connected to the inner wall of the top surface of the housing 2 and is located above the wire management groove 13. The wires connected to the double metal component 4 and the wires connected to the incoming terminal 3 all pass through the wire management groove 13. A slide groove 14 is provided on the other side of the vertical plate 11, one end of the tripping rod 5 is located in the slide groove 14, and the other end is connected to the operating mechanism.

[0026] like Figure 2 As shown, the bimetal component 4 includes a bimetallic strip 41 and an arc-starting strip 42. The arc-starting strip 42 is provided with two symmetrical wing plates 43 for connecting to the slot on the housing 2 for fixing. The wire connected to one end of the bimetallic strip 41 passes through the wire management slot 13. The incoming terminal 3 includes a mutually connected terminal portion 31 and an extension piece 32. The extension piece 32 is arranged close to the inner wall of the top surface of the housing 2, and the wire connected to one end of the extension piece 32 passes through the wire management slot 13. Thus, the trip rod 5 and the wire are completely isolated by the vertical plate 11. When the bimetallic strip 41 is bent by the overload current, the front end of the bimetallic strip 41 drives the trip rod 5 to slide in the slide slot 14. Since the connecting wire and the trip rod 5 in the circuit breaker are respectively located on both sides of the vertical plate 11, they will not interfere with each other, which significantly improves the stability of the working state.

[0027] Embodiment 2

[0028] The difference between this embodiment and the first embodiment is that the wire splitting mechanism only includes a vertical plate. The slide groove on the vertical plate is a hollow groove that penetrates the vertical plate. One end of the tripping rod penetrates the slide groove but does not penetrate the slide groove to prevent it from interfering with the wires on the other side of the vertical plate.

[0029] Embodiment 3

[0030] like Figure 3As shown, the difference between this embodiment and the first embodiment is that the line splitting mechanism 1 and the housing 2 are split structures. A slot 21 is provided in the housing 2, and the end of the horizontal plate 12 is inserted into the slot 21 so that the line splitting mechanism 1 is connected to the housing 2. In addition, the horizontal plate 12 can be connected to the slot 21 by interference fit to improve the connection strength. The split design is easy to produce and process, and it can be freely selected whether to install the line splitting mechanism 1 according to the actual use situation, which has wide applicability and flexible use.

[0031] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A plug-in circuit breaker branching mechanism, the plug-in circuit breaker comprising a housing (2), an incoming line terminal (3), a double metal component (4) and an operating mechanism, wherein the incoming line terminal (3), the double metal component (4) and the operating mechanism are all located in the housing (2), wherein the incoming line terminal (3) is located at the rear end of the housing (2), the double metal component (4) is located at the front side of the incoming line terminal (3), and the operating mechanism is located at the front side of the double metal component (4), characterized in that: The line splitting mechanism (1) comprises a vertical plate (11), the top end of the vertical plate (11) is connected to the top inner wall of the housing (2), one side of the vertical plate (11) and the side wall of the housing (2) are spaced apart to form a line management groove (13), the wires connected to the bimetallic component (4) and the wires connected to the incoming terminal (3) both pass through the line management groove (13), the other side of the vertical plate (11) is provided with a slide groove (14), one end of the tripping rod (5) is located in the slide groove (14), and the other end is connected to the operating mechanism; The line splitting mechanism (1) further comprises a horizontal plate (12), the horizontal plate (12) and the vertical plate (11) forming an L-shape, the top surface of the horizontal plate (12) being connected to the top inner wall of the housing (2) and being located above the line management groove (13); A slot (21) is provided in the housing (2), and the end of the horizontal plate (12) is inserted into the slot (21) so that the branching mechanism (1) is connected to the housing (2).

2. The line branching mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The horizontal plate (12) and the slot (21) are connected by interference fit.

3. The line branching mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The sliding groove (14) is a hollow groove penetrating the vertical plate (11).

4. The line branching mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The bimetal component (4) comprises a bimetallic strip (41) and an arc-starting strip (42), and a wire connected to one end of the bimetallic strip (41) passes through a wire management groove (13).

5. The branching mechanism of a plug-in circuit breaker according to claim 4, characterized in that: The arc-starting piece (42) is provided with a wing plate (43) for connecting to a slot on the housing (2) for fixation.

6. The line branching mechanism of a plug-in circuit breaker according to claim 5, characterized in that: The wing plates (43) are symmetrically located on both sides of the arc-starting plate (42).

7. The line branching mechanism of a plug-in circuit breaker according to claim 1, characterized in that: The incoming terminal (3) comprises a mutually connected terminal portion (31) and an extension piece (32); the extension piece (32) is arranged close to the inner wall of the top surface of the housing (2); and the wire connected to one end of the extension piece (32) passes through the wire management groove (13).

8. A plug-in circuit breaker, characterized in that: A branching mechanism of a plug-in circuit breaker as claimed in any one of claims 1 to 7 is arranged inside.

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