Rotary shaft device of circuit breaker

Abstract

A rotating shaft device for a circuit breaker, which includes a plurality of contact supports installed with moving contacts and a rotating shaft for linking the plurality of contact supports. The contact and separation of the contacts realize the closing and breaking of the circuit breaker; the radial section of the rotating shaft is a parallelogram, the contact support is provided with a shaft groove with a V-shaped structure for installing the rotating shaft, and the rotating shaft device also includes a V-shaped The card plate of the fixed groove of the structure, the fixed groove of the V-shaped structure is set corresponding to the shaft groove of the V-shaped structure, the contact support is fixedly connected with the card plate, and the rotating shaft is fixed in the space enclosed between the shaft groove and the fixed groove , the shaft groove cooperates with two adjacent sides of the rotating shaft, and the fixed groove cooperates with the other two adjacent sides of the rotating shaft, so that multiple contacts can be supported through the rotating shaft for stable and firm linkage.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker, in particular to a rotating shaft device of the circuit breaker. Background technique [0002] Circuit breakers are an important part of the electrical industry and have been widely used. When the circuit is working normally, the circuit breaker can achieve functions such as power failure, power supply and conversion circuit by closing or opening the circuit supplying electric energy. When faults such as overload, loss of voltage, undervoltage or short circuit occur in the circuit, the circuit breaker can automatically cut off the circuit to avoid endangering the safety of workers and the normal operation of equipment due to circuit faults. The existing circuit breaker shaft is fixed by clamps and riveted on the bracket supported by the contacts. As long as the riveting is loose, the shaft, clamps, and brackets will loosen, and the matching par...

AI Technical Summary

Problems solved by technology

The existing circuit breaker shaft is fixed by clamps and riveted on the bracket supported by the contacts. As long as the riveting is loose, the shaft, clamps, and brackets will loosen, and the matching parts will gradually produce gaps. Changes in travel position of the unit creating play at the mating

In addition, the unbalanced transmission of driving force between the operating mechanism and the contact support may easily lead to changes in the travel position of the contact device, affecting the safe use of electricity by customers

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