Lever and supporting matching structure for circuit breaker operation mechanism

Abstract

The invention discloses a lever and supporting matching structure for a circuit breaker operation mechanism. The lever and supporting matching structure comprises a lever, a support and wear-resisting locating covers. The support comprises two side plates and a connector connecting the two side plates, and grooves enabling the lever to be rotatable contact are formed in the side plates. The lever comprises a lever main body and rotating feet arranged on the two sides of the lever main body, and supporting feet are arranged at the contact ends, in rotatable contact with the support, of the rotating feet. The wear-resisting locating covers are arranged on the supporting feet and are in rotatable contact with the grooves of the side plates. The lever and supporting matching structure for the circuit breaker operation mechanism can improve the performance stability of the operation mechanism, prolong the service life of the operation mechanism, and reduce the processing difficulty of the lever and the support.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a lever and bracket matching structure of an operating mechanism of a circuit breaker. Background technique [0002] In the prior art, the publication number is CN102290293A, which discloses a matching structure between the lever and the side plate of the circuit breaker operating mechanism. Each side plate has a groove, and the rotating foot is rotatably supported on the groove, that is, the rotating foot of the lever directly contacts with the side plate. The groove of the side plate is frictionally contacted, so the turning foot of the lever and the groove of the side plate are severely worn, which affects the performance and stability of the operating mechanism. In order to solve this technical problem, it is usually necessary to heat treat the lever and the side plate as a whole, which is difficult to process. Larger, higher requirements for process conditions, incr...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the publication number is CN102290293A, which discloses a matching structure between the lever and the side plate of the circuit breaker operating mechanism. Each side plate has a groove, and the rotating foot is rotatably supported on the groove, that is, the rotating foot of the lever directly contacts with the side plate. The groove of the side plate is frictionally contacted, so the turning foot of the lever and the groove of the side plate are severely worn, which affects the performance and stability of the operating mechanism. In order to solve this technical problem, it is usually necessary to heat treat the lever and the side plate as a whole, which is difficult to process. Larger, higher process conditions, increased processing costs, and when the lever and side plate are heat treated as a whole, they are prone to deformation

[0003] The publication number is CN101101834A, which discloses a circuit breaker operating mechanism and its lever anti-skid structure. The rotating foot of the lever is in rotatable contact with the groove of the side plate, and there is also serious wear and tear between the rotating foot of the lever and the groove of the side plate, which affects The problem of the performance stability of the operating mechanism

[0004] The publication number is CN202111018U, which discloses an operating mechanism for molded case circuit breakers. The supporting legs of the rocking plate are located in the arc groove of the side plate of the base frame, and can reciprocate in the arc groove. The arc grooves of the supporting feet and the side plates of the base frame are severely worn, which affects the performance stability of the operating mechanism

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