A circuit breaker operating mechanism

Abstract

The invention discloses a breaker operating mechanism which comprises a transmission component. The transmission component comprises a contact support pivoted to the shell of a breaker, a lock catch and a jump fastener. The lock catch and the jump fastener are respectively pivoted to the contact support. The lock catch and the jump fastener are respectively provided with fastening faces suitable for fastening and disconnecting of the lock catch and the jump fastener. When the lock catch is fastened to the jump fastener, the transmission component is in the lock state, the lock catch exerts a force for disconnecting the jump fastener with the lock catch on the jump fastener. The fastening face of the jump fastener is an arc face using the pivot point of the jump fastener as the center. During disconnection of the jump fastener and the lock catch, slide trajectory of the fastening face of the lock catch on the fastening face of the jump fastener is an arc using the pivot point of the jump fastener as the center. By the arrangement, during disconnection of the jump fastener and the lock catch, the disconnection force exerted by the lock catch on the arc face of the jump fastener is constant, service life of the lock catch and the jump fastener can be prolonged favorably, and work stability and reliability of the breaker operating mechanism are increased.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a circuit breaker operating mechanism with fast opening and closing without slipping and constant tripping force. Background technique [0002] The circuit breaker is the terminal equipment of the power distribution line. It has the characteristics of small size and modularization, and is mainly used to protect the line. There are various types of operating mechanisms for circuit breakers. Most of them use the force transmission between the connecting rods to realize the closing and separating process of the moving and static contacts. The purpose of tripping is achieved through the conversion between the four-link and five-link operating mechanisms. [0003] For example, Chinese patent document CN102426999A discloses an operating mechanism of a modular circuit breaker, which includes a moving contact, a static contact, an operating handle pivotally mounted on the circui...

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the inconstant tripping force between the lock and jumper during the locking and unlocking process of the circuit breaker operating mechanism in the prior art, which is not conducive to the prolongation of the service life of the lock and jumper. , and it is not conducive to the stability of the operating mechanism, so as to provide a constant locking and tripping force during the locking and unlocking process, which is conducive to prolonging the service life of the locking and jumping buttons and further improving the operation of the circuit breaker operating mechanism. Reliable circuit breaker operating mechanism

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