Spring operating mechanism of circuit breaker

Abstract

The invention relates to a spring operating mechanism of a circuit breaker. The spring operating mechanism comprises a mechanism box, wherein a cam shaft is arranged in the mechanism box, a switch-on cam is arranged on the cam shaft and is in transmission connection with a switch-on spring by an energy storage crank arm, a driving main shaft is further arranged in the mechanism box, a switch-on crank arm part, a driving crank arm part and a switch-on maintaining plate are fixedly arranged on the driving main shaft, a trip half shaft is rotatably assembled on the mechanism box, is provided with a switch-on maintaining position in a rotation range and is also provided with a trip avoidance position, the switch-on maintaining position is matched with the switch-on maintaining plate in a contact and stop way so that the driving crank arm will be partially locked at a switch-on position by the switch-on maintaining plate and the driving main shaft, and the trip avoidance position is used for tripping and avoiding the switch-on maintaining plate. The trip half shaft is used for directly stopping and limiting the switch-on maintaining plate, switch-on maintaining and limiting of the driving main shaft are further achieved, a switch-off maintaining plate can be rapidly tripped only by driving the trip half shaft to rotate at the avoidance position, the whole structure is relatively simple, and the tripping operation is rapid and convenient.

Description

technical field [0001] The invention relates to a circuit breaker spring operating mechanism, belonging to the field of circuit breaker operating mechanisms. Background technique [0002] At present, the operating mechanism used in the domestic 40.5kV medium voltage circuit breaker belongs to the structure of sliding curved wheel, crank arm and four-linkage. The upper four-link structure is an unstable structure, which causes unstable operation characteristics, often resulting in insufficient closing, secondary energy storage failure, and changes in opening and closing speeds. It adds a lot of hidden dangers to the circuit breaker in the operation process, and also brings unstable factors to people's production and life. [0003] In the Chinese Utility Model Patent Specification whose authorized announcement number is CN200965845Y, a small spring operating mechanism of a high-voltage circuit breaker is disclosed, including a mechanism box in which an energy storage transmis...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a circuit breaker spring operating mechanism to solve the problem that the existing spring operating mechanism is equipped with an opening detent and a buckle plate to cooperate with the opening half shaft, which makes the opening and tripping action slow and the overall structure is relatively complicated. technical issues

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