Tripping device for breaker operation mechanism

Abstract

This invention relates to a trip device for a breaker operation unit including a first and a second lock buttons having a pair of first and second pivoted flanges, a hop button, a spring and a traction rod characterizing that tenons are set on any pivoted flange in the pair of the first flanges of the first lock button and tenon holes are set on the middle section of the traction rod opposite to the tenons, grooves are set axially at the back of the middle section of the traction rod and swivel grooves are set on the opposite internal walls of the back of the middle section and the axis of the swivel groove and that of the groove are on a same line.

Description

technical field [0001] The invention relates to a tripping device of an operating mechanism of a circuit breaker, which is used for tripping the circuit breaker and belongs to the field of low-voltage electrical appliances. Background technique [0002] CN1409344A discloses the improvement of the trip bar and trip armature assembly used for circuit breakers, and specifically relates to the tripping device of the circuit breaker operating mechanism. As far as the matching structure of the main body of the lock bolt (customarily referred to as the buckle) is concerned, it has the characteristics of achievements, but also has deficiencies. The characteristic of Jianshu is that by opening a through hole on the drawbar and correspondingly opening a threaded through hole on the lock buckle, the two are connected by means of the through hole with screws, so that the bimetallic sheet can be heated. Bending deformation actuates the drawbar, causing the drawbar to rotate and at the s...

AI Technical Summary

Problems solved by technology

That is to say, since the above solution can make the drawbar the last part to be installed, the volume of the circuit breaker can also be reduced accordingly; the shortcomings are as follows: first, the use of screw assembly is still not enough to fully reflect the effect of quick installation, and Fasteners can not be saved to the greatest extent, so that the saving of parts cannot reach the ultimate degree; the second is that when the drawbar is fixed with the lock buckle with screws, the compatible surface of the drawbar and the lock buckle and the drawbar and the lock buckle are compatible with each other. The compatible surface of the bracket of the pivot lock is often subjected to the horizontal extrusion force opposite to the screwing direction, which will cause the overall deformation or even damage of the drawbar, because the drawbar is made of thermoplastic material, and the lock and bracket are The third is that when the drawbar and the lock are fixed with screws, the generated force will also be transmitted to the fixed point of the bracket and the circuit breaker case, causing looseness between the two, and finally causing the drawbar, The relative position of the lock, bracket and housing cannot be guaranteed, because during the process of screwing and assembling with tools, the force on the drawbar, lock and bracket is accompanied by horizontal extrusion force

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