A circuit breaker movable contact soft connection wire welding structure and circuit breaker

Abstract

The utility model discloses a kind of soft connection wire welding structure and circuit breaker of moving contact of circuit breaker, including moving contact and soft connection wire, soft connection wire includes mutually connected soft wire part and hard block part, welding platform is equipped on moving contact, hard block part is integrally welded and connected in welding platform, define the end of soft wire part and hard block part connection as rear end, reserved interval L is set between the rear end of hard block part and the rear end of welding platform.This utility model since hard block part is integrally welded in welding platform, by setting reserved interval L between the rear end of hard block part and the rear end of welding platform, so, hard block part and soft wire part connection place can be effectively avoided in use process always in excessive bending state, the abutment between soft wire part and the rear end of welding platform can play the role of stress dispersion, to improve the metal fatigue life of hard block part and soft wire part connection place, reduce the fracture risk of connection place.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a flexible connection welding structure for the moving contact of a circuit breaker and the circuit breaker itself. Background Technology

[0002] There is a circuit breaker with a flexible wire welding structure for the moving contact. The moving contact is connected to related components via a flexible wire. The flexible wire typically includes a flexible wire part and a rigid part. The rigid part is directly welded to the moving contact, and then the flexible wire part is led out for connection. However, the moving contact operates frequently during use, which can easily lead to the risk of breakage at the connection between the rigid part and the flexible wire part due to long-term repeated bending, resulting in unstable performance or even failure to conduct. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a flexible connection welding structure for the moving contact of a circuit breaker. A reserved gap L is provided between the rear end of the rigid block and the rear end of the welding platform, which can effectively prevent the connection between the rigid block and the flexible wire from being in an excessively bent state.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: A flexible connection welding structure for a circuit breaker moving contact includes a moving contact and a flexible connection. The flexible connection includes a flexible wire portion and a rigid block portion that are connected to each other. A welding platform is provided on the moving contact. The rigid block portion is integrally welded to the welding platform. The end where the flexible wire portion and the rigid block portion are connected is defined as the rear end. A reserved gap L is provided between the rear end of the rigid block portion and the rear end of the welding platform.

[0005] Furthermore, the reserved distance L between the rear end of the hard block and the rear end of the welding platform is 0.5mm to 1.5mm.

[0006] Furthermore, the front end of the welding platform is provided with a slanted groove for mounting the torsion spring pins to prevent interference with the hard block portion.

[0007] Furthermore, the welding platform is provided with protrusions that abut against the sidewall of the hard block portion.

[0008] Furthermore, the side of the bulge facing the hard block portion has a planar structure.

[0009] Furthermore, the length and width dimensions of the hardened portion are 3-4 mm × 3-4 mm.

[0010] Furthermore, the dimensions of the hard block are 3.5mm x 3.5mm.

[0011] Based on the same inventive concept, this utility model also provides a circuit breaker, including the above-mentioned circuit breaker moving contact flexible connection welding structure.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] In the circuit breaker moving contact flexible connection welding structure and circuit breaker described in this utility model, since the entire rigid block part is welded in the welding platform, and a reserved gap L is set between the rear end of the rigid block part and the rear end of the welding platform, it can effectively avoid the connection between the rigid block part and the flexible wire part being in an excessively bent state during use. The abutment between the flexible wire part and the rear end of the welding platform can play a role in dispersing stress, thereby improving the metal fatigue life at the connection between the rigid block part and the flexible wire part, reducing the risk of fracture at the connection between the rigid block part and the flexible wire part, and thus improving the stability and service life of the product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the flexible connection welding structure of the moving contact of the circuit breaker according to an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the flexible connection welding structure of the moving contact of the circuit breaker according to another embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the assembly structure of the flexible connection welding structure of the moving contact of the circuit breaker according to an embodiment of the present invention.

[0017] Label Explanation:

[0018] 1. Moving contact; 2. Flexible wire; 11. Welding platform; 21. Flexible wire section; 22. Hard block section; 111. Inclined groove; 112. Protrusion. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please refer to the appendix. Figure 1 To be continued Figure 3An embodiment of this utility model provides a welding structure for the flexible connecting wire of a circuit breaker moving contact, including a moving contact 1 and a flexible connecting wire 2. The flexible connecting wire 2 includes a flexible wire portion 21 and a rigid block portion 22 connected to each other. A welding platform 11 is provided on the moving contact 1. The rigid block portion 22 is integrally welded to the welding platform 11. The end where the flexible wire portion 21 and the rigid block portion 22 are connected is defined as the rear end. A reserved gap L is provided between the rear end of the rigid block portion 22 and the rear end of the welding platform 11. It is understood that in this embodiment, since the entire rigid block portion 22 is welded into the welding platform 11, by setting a reserved gap L between the rear end of the rigid block portion 22 and the rear end of the welding platform 11, it is possible to effectively prevent the connection between the rigid block portion 22 and the flexible wire portion 21 from being in an excessively bent state during use. The abutment between the flexible wire portion 21 and the rear end of the welding platform 11 can play a role in dispersing stress, thereby improving the metal fatigue life at the connection between the rigid block portion 22 and the flexible wire portion 21, reducing the risk of breakage at the connection between the rigid block portion and the flexible wire portion, and thus improving the stability and service life of the product.

[0022] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the reserved distance L between the rear end of the hard block portion 22 and the rear end of the welding platform 11 is 0.5mm to 1.5mm.

[0023] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the front end of the welding platform 11 is provided with a slanted groove 111 for accommodating the torsion spring pin to avoid interference with the hard block portion 22.

[0024] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the welding platform 11 is provided with a protrusion 112 that abuts against the side wall of the hard block portion 22. Preferably, the side of the protrusion 112 facing the hard block portion 22 is a planar structure. It can be understood that, in this embodiment, by setting the protrusion 112, the limiting effect of the protrusion 112 can play a certain role in the pre-positioning of the hard block portion 22 on the welding platform 11, thereby improving the positioning accuracy of the hard block portion 22 on the welding platform 11. On the other hand, the height of the protrusion on the moving contact can be pre-designed to form a stable and uniform gap between the two metal parts. This helps to distribute heat evenly and form a molten pool during welding, improving welding quality. In addition, when welding a soft-connected hard block, the current or heat will preferentially concentrate at the protrusion position, causing the protrusion to melt quickly, reducing the thermal impact on the surrounding area, improving welding efficiency and reducing the risk of deformation. Furthermore, the weld point or weld seam formed after the protrusion on the moving contact melts can increase the bonding area, thereby improving the connection strength and reliability of the welded part.

[0025] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the length and width dimensions of the hard block portion 22 are 3-4 mm × 3-4 mm. Further, the length and width dimensions of the hard block portion 22 are 3.5 mm × 3.5 mm. However, those skilled in the art should understand that in other embodiments, the length and width dimensions of the hard block portion 22 can also be other values. Those skilled in the art can set these dimensions according to specific needs and are not limited to the specific implementation methods disclosed in this embodiment.

[0026] Please refer to the appendix. Figure 1 Appendix Figure 2 An embodiment of this utility model also provides a circuit breaker, including the above-mentioned circuit breaker moving contact flexible connection welding structure.

[0027] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A flexible connection welding structure for the moving contact of a circuit breaker, characterized in that: It includes a moving contact (1) and a flexible wire (2). The flexible wire (2) includes a flexible wire part (21) and a hard block part (22) that are connected to each other. A welding platform (11) is provided on the moving contact (1). The hard block part (22) is welded to the welding platform (11) as a whole. The end where the flexible wire part (21) and the hard block part (22) are connected is defined as the rear end. A reserved gap L is provided between the rear end of the hard block part (22) and the rear end of the welding platform (11).

2. The flexible connection welding structure for the moving contact of a circuit breaker according to claim 1, characterized in that: The reserved distance L between the rear end of the hard block part (22) and the rear end of the welding platform (11) is 0.5mm~1.5mm.

3. The flexible connection welding structure for the moving contact of a circuit breaker according to claim 1, characterized in that: The welding platform (11) has a slanted groove (111) at the front end for placing the torsion spring pin to avoid interference with the hard block part (22).

4. The flexible connection welding structure for the moving contact of a circuit breaker according to claim 1, characterized in that: The welding platform (11) is provided with a protrusion (112) that abuts against the side wall of the hard block part (22).

5. The flexible connection welding structure for the moving contact of a circuit breaker according to claim 4, characterized in that: The side of the convex bud (112) facing the hard block part (22) has a planar structure.

6. The flexible connection welding structure for the moving contact of a circuit breaker according to any one of claims 1 to 5, characterized in that: The length and width of the hard block part (22) are (3~4) mm × (3~4) mm.

7. The flexible connection welding structure for the moving contact of a circuit breaker according to claim 6, characterized in that: The length and width of the hard block (22) are 3.5mm × 3.5mm.

8. A circuit breaker, characterized in that: Includes the flexible connection welding structure for the moving contact of a circuit breaker as described in any one of claims 1 to 7.

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