A mechanism with a flexible opening buffer anti-rebound device on a low-voltage circuit breaker

Abstract

The invention relates to a mechanism with a flexible sub switch buffering anti-rebound device on a low-voltage circuit breaker. The low-voltage circuit breaker comprises left and right fixed plates, amain shaft arranged between the two fixed plates and is used for forming a transmission mechanism, and a contact mechanism which is arranged between the fixed plates. The mechanism with a flexible sub switch buffering anti-rebound device comprises a bracket, an oil cup, a cup cap, a piston, crank arms and a roller. The bracket is fixed on the fixed plates, the oil cup is fixed on the bracket andis filled with oil, the piston is arranged in the oil cup, an upper end of the piston is connected to the cup cap, the crank arms are connected to the main shaft, the roller is connected between the two crank arms, and the roller is located directly above the cup cap. When the circuit breaker is switched on, the roller is not in contact with the cup cap, when the circuit breaker is switched off, the main shaft rotates to drive the roller to move to press the cup cap down, the cup cap drives the piston to move downward, and the oil in the oil cup is compressed. When the circuit breaker is quickly switched off and an opening distance is small, the rebound of the circuit breaker in switch-off can be reduced by the mechanism of the invention.

Description

technical field [0001] The invention relates to a circuit breaker mechanism, in particular to a mechanism with a flexible opening buffer anti-rebound device on a low-voltage circuit breaker. Background technique [0002] The existing low-voltage circuit breaker mechanism adopts rigid opening limit. This mechanism device can control the opening rebound amplitude of the circuit breaker within a certain range. When the opening distance of the circuit breaker is large and the opening speed is not very fast, it can It plays the role of anti-rebound, but when the opening distance of the low-voltage circuit breaker is small, the opening speed of the circuit breaker is required to be faster to achieve reliable opening. The rebound amplitude will be very large, causing arcing and heavy breakdown of the circuit breaker. Therefore, it is necessary to design a mechanism with a flexible buffer anti-rebound device to reduce the rebound when the circuit breaker opens quickly and the openi...

AI Technical Summary

Problems solved by technology

In this patent, the flexible opening buffer energy-absorbing device adopts two methods, one is an oil buffer, and the other is a spring buffer, and the oil buffer is compressed by the rotation of the connecting rod mechanism hitting the struck rod. Oil, which converts kinetic energy into thermal energy and internal friction of the oil, thus consuming energy

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