CN216698257U

CN216698257U - Copper-aluminum joint of miniature circuit breaker

Info

Publication number: CN216698257U
Application number: CN202123265370.2U
Authority: CN
Inventors: 陈佳成; 袁迪飞; 王民军; 戴水东
Original assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Current assignee: Shanghai Hua Tong Switchgear Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-06-07
Anticipated expiration: 2031-12-23

Abstract

The utility model relates to a copper-aluminum joint, in particular to a copper-aluminum joint of a miniature circuit breaker. Including miniature circuit breaker, miniature circuit breaker in be equipped with the wire clamp and be equipped with the aluminium stranded conductor in the wire clamp, the upper end inner wall and the aluminium stranded conductor of wire clamp between be equipped with electrically conductive and the bank looks resistance weld, the lower extreme and the aluminium stranded conductor of wire clamp between be equipped with the elastic component. The structure compactness is high, and the circuit breaker is effectively protected.

Description

Copper-aluminum joint of miniature circuit breaker

Technical Field

The utility model relates to a copper-aluminum joint, in particular to a copper-aluminum joint of a miniature circuit breaker.

Background

The miniature circuit breaker is an electrical apparatus that uses very extensively, and the power inlet wire end of every family is this kind of circuit breaker commonly used, and generally used electric wire is the single strand copper line, inserts circuit breaker wire clamp square mouth, and locking screw can make electric wire and built-in run-on contact, and this scheme is still used up to now. Recently, in some areas, in order to reduce the cost, the adopted electric wire is a multi-strand aluminum stranded wire which is light and cheap, has certain current bearing capacity and good heat dissipation, but the matching of the multi-strand aluminum stranded wire and a wire clamp often causes problems, firstly, the multi-strand aluminum stranded wire can be scattered under the fastening of a screw, and the copper-aluminum joint force is influenced; secondly, after the power-on and power-off expand with heat and contract with cold, a gap is formed between the aluminum stranded wire and the connecting bar, and the aluminum stranded wire in the wire clamp is often burnt.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the defects in the prior art, and provides the copper-aluminum joint of the miniature circuit breaker, which has better effect through a temperature rise test and has positive effects on replacing copper wires with aluminum, reducing the cost and solving the problems of high cost and the like.

The technical problem of the utility model is mainly solved by the following technical scheme:

the utility model provides a miniature circuit breaker copper aluminium connects, includes miniature circuit breaker, miniature circuit breaker in be equipped with the wire clamp and be equipped with the aluminium stranded conductor in the wire clamp, the upper end inner wall and the aluminium stranded conductor of wire clamp between be equipped with electrically conductive and the bank of being connected looks resistance weld, the lower extreme and the aluminium stranded conductor of wire clamp between be equipped with the elastic component.

Preferably, the wire clamp is provided with a screw fixed with the miniature circuit breaker, the tail part of the screw is pressed against the connecting row to displace the wire clamp upwards, the elastic part in the wire clamp presses the aluminum stranded wire to extend towards the left side and the right side, and the wire clamp is contacted with the inner side surface of the conductive part.

Preferably, the cross section of the elastic member is in an "M" shape, and two end pins of the elastic member are attached to the inner wall of the wire guide clamp.

The structure increases the contact area of the aluminum stranded wire and the conductive piece, reduces the contact resistance and has small heat productivity during work; and secondly, due to the arrangement of the elastic part, the aluminum stranded wire is always in contact with the conductive part, so that a gap is not formed between the aluminum stranded wire and the conductive part due to expansion caused by heat and contraction caused by cold, and the use requirement is better met.

The utility model provides a copper-aluminum joint of a miniature circuit breaker, which has high structural compactness and effectively protects the circuit breaker.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a side view of the present invention.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

Example 1: as shown in the figure, a miniature circuit breaker copper aluminium connects, including miniature circuit breaker 1, miniature circuit breaker 1 in be equipped with wire clamp 2 and wire clamp 2 in be equipped with aluminium strand wires 3, wire clamp 2 upper end inner wall and aluminium strand wires 3 between be equipped with electrically conductive 4 and 5 looks resistance weld of bank of being connected, wire clamp 2 lower extreme and aluminium strand wires 3 between be equipped with elastic component 6.

The lead clamp 2 is internally provided with a screw 7 fixed with the miniature circuit breaker 1, the tail part of the screw 7 props against the connecting bar 5 to upwardly displace the lead clamp 2, an elastic part 6 in the lead clamp 2 presses the aluminum stranded wire 3 to extend towards the left side and the right side, and the lead clamp 2 is contacted with the inner side surface of the conductive part 4.

The cross section of the elastic part 6 is in an M shape, and two end pins of the elastic part 6 are attached to the inner wall of the wire clamp 2.

Claims

1. A miniature circuit breaker copper aluminium connects which characterized in that: including miniature circuit breaker (1), miniature circuit breaker (1) in be equipped with wire clamp (2) and wire clamp (2) in be equipped with aluminum stranded conductor (3), upper end inner wall and aluminum stranded conductor (3) of wire clamp (2) between be equipped with electrically conductive (4) and connecting row (5) looks resistance weld, the lower extreme and aluminum stranded conductor (3) of wire clamp (2) between be equipped with elastic component (6).

2. The copper-aluminum joint of the miniature circuit breaker as recited in claim 1, wherein: the lead clamp (2) is internally provided with a screw (7) fixed with the miniature circuit breaker (1), the tail part of the screw (7) props against the connecting bar (5) to upwardly displace the lead clamp (2), an elastic part (6) in the lead clamp (2) presses the aluminum stranded wire (3) to extend towards the left side and the right side, and the lead clamp (2) is contacted with the inner side surface of the conductive part (4).

3. The copper-aluminum joint of the miniature circuit breaker as recited in claim 1 or 2, wherein: the cross section of the elastic piece (6) is M-shaped, and two end pins of the elastic piece (6) are attached to the inner wall of the wire clamp (2).