Air circuit breaker and breaking spring of air circuit breaker

Abstract

An air circuit breaker, a breaking spring of the air circuit breaker, and its connection method are disclosed. The air circuit breaker includes: a cam; a driving lever connected with the cam and rotated; a closing spring compressed by the driving lever; a plurality of links that transfer a driving force generated when the closing spring is stretched; a switching shaft connected with one or the links by a connection shaft and rotated according to movement of the link; and a breaking spring having a fixing hole with one side opened at one end portion thereof, so as to be fixed to the connectionshaft perpendicularly in an axial line direction of the connection shaft. A space for assembling does not need to be formed at an end portion of the connection shaft, obtaining a compact structure. In addition, a tool can be simplified, an installation can be facilitated, an assembling time can be shortened, and a fabrication cost can be reduced.

Description

technical field [0001] The present invention relates to an air circuit breaker, a circuit breaker spring of the air circuit breaker and a connecting method thereof, more particularly to an air circuit breaker capable of simply installing a circuit breaker spring, a circuit breaker spring of the air circuit breaker and a connection method thereof . Background technique [0002] Generally, an air circuit breaker is a device that interrupts a circuit (that is, blocks an electrical connection) when a load is turned on or off, when an overload occurs, when a short circuit event occurs, or when an electric leakage or electric shock occurs. [0003] Such as Figures 1 to 3 As shown, the prior art circuit breaker includes a switching mechanism component 102 that switches a circuit by moving a movable contact 138 to a terminal 139 . [0004] The switching mechanism part 102 includes: a cam 122 connected with the rotating shaft 121 and rotated manually or automatically; When the cam...

AI Technical Summary

Problems solved by technology

That is, the space for assembling should be fixed between the connecting shaft 136 and the end of the frame 109, which makes it difficult to obtain a compact structure

[0014] In particular, since the switching mechanism part 102 has multiple components, it is difficult to obtain a sufficient space between the connecting shaft 136 and the end of the frame 109, so the structure of the tool for stretching the trip spring 137 is complicated, causing Difficulty designing the tool and the complex process of installing the break spring 137

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