The secondary locking mechanism of the operating mechanism of the circuit breaker

Abstract

The invention discloses a secondary latching mechanism of an operation mechanism of a circuit breaker. The operation mechanism comprises a jump pin component, a left side plate component, a right side plate component, a latching component, a half shaft component, a lever component and a main shaft component, wherein the jump pin component, the latching component and the lever component are installed between the left side plate component and the right side plate component, and the half shaft component and the main shaft component penetrate through the left side plate component and the right side plate component and extend out of the left side plate component and the right side plate component; the jump pin component, the latching component, the half shaft component, the lever component and the main shaft component are linked; the jump pin component comprises a jump pin, and a second end of the jump pin has a latching surface; the latching component comprises a sheet metal part rotating around a rotary shaft, and a bearing installed on the sheet metal part, the bearing makes contact with the latching surface, and the latching component limits the jump pin component; the half shaft component comprises a half shaft, the sheet metal part makes contact with the half shaft, and the half shaft component limits the latching component. The secondary latching mechanism is formed by the jump pin component, the latching component and the half shaft component.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, more specifically, to a locking mechanism in an operating mechanism of a switch electrical appliance. Background technique [0002] The circuit breaker is the main protective switching device in the low-voltage distribution network. The circuit breaker provides overload and short-circuit protection for the line. Molded case circuit breaker is one of them, and large-capacity molded case circuit breaker refers to a circuit breaker with a rated current of 800A or more. Group contacts, corresponding to three-phase or four-phase circuits. In order to meet certain selective protection requirements in the power system, the circuit breaker must have a certain short-term withstand capacity. Therefore, the contact components of large-capacity molded case circuit breakers, especially the multi-pole transmission components, must have high strength and rigidity to meet the uniformity of mult...

AI Technical Summary

Problems solved by technology

For the manual operation mechanism, the three-pole locking mechanism is generally used, and the requirement for human operation force is reduced through the leverage amplification effect of the three-pole mechanism. However, the three-pole locking mechanism is a three-pole interlocking mechanism, so the response speed is relatively slow. , making the overall tripping speed of the operating mechanism slower

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