Spring operating mechanism and circuit breaker

Abstract

The invention relates to a spring operating mechanism and a circuit breaker. The circuit breaker comprises a contact and the spring operating mechanism. The spring operating mechanism comprises a spindle, a breaking connecting lever fixedly connected with the spindle, a buffer component, a spring core bar and a breaking spring, wherein the spring core bar is connected with the breaking connectinglever by virtue of a pin shaft, the spring core bar is provided with a guide holder enabling the spring core bar to move along the length direction, and one of the breaking connecting lever and the spring core bar is provided with a slot hole matched with the pin shaft, so that swinging motion of the breaking connecting lever and linear motion of the spring core bar are not mutually interfered; and the buffer component is provided with an interception side vertical to the spring core bar. Reset response of the breaking spring in a working process of the circuit breaker enables the spring corebar to maintain the linear motion when being guided by the slot hole and the guide holder, lateral impact of the spring core bar to the buffer component is reduced, life of the buffer component is prolonged, and the linear motion of the spring core bar enables parameters of the circuit breaker to be more stable, so that mechanical characteristics and safety and reliability performances of the circuit breaker are improved.

Description

technical field [0001] The invention relates to a spring operating mechanism and a circuit breaker. Background technique [0002] The circuit breaker is an important electrical device used to open / close the electrical circuit in the power distribution network. When the electrical circuit fails, it can quickly and accurately cut off the faulty circuit to ensure the safe and stable operation of the power line. After the spring mechanism of the circuit breaker has stored energy, manual or electric operation causes the mechanism to close and trip, and the energy of the stored energy spring is released quickly to close the primary circuit of the circuit breaker, and the mechanism remains at the closed position. At the same time, the opening spring stretches or compresses Variant, ready for the opening of the circuit breaker; when opening is required, the mechanism is opened and tripped by manual or electric operation, and the energy of the opening spring is released quickly to op...

AI Technical Summary

Problems solved by technology

[0004] Since the opening arm and the spring seat with holes in the above-mentioned existing circuit breaker swing around the axis of the main shaft, the spring seat with holes swings upwards at a certain angle when it hits the buffer assembly, which produces an upward lateral impact on the buffer assembly, causing damage to the buffer assembly. The buffer component will affect the service life of the buffer component over time, shorten or prolong the curve stroke during the reset process of the opening spring, which will lead to unstable parameters of the circuit breaker, affect the mechanical characteristics of the circuit breaker, and reduce its safety and reliability during use.

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