Closing transmission mechanism and operating mechanism and circuit breaker using the transmission mechanism

Abstract

The invention discloses a closing transmission mechanism and an operating mechanism using the transmission mechanism and a circuit breaker. The closing transmission mechanism includes a toggle lever and a force transmission block for being fixed with the corresponding moving contact. The force transmission block It is located under the toggle lever and the force transmission block is provided with a load-bearing shoulder facing the toggle lever. Pushing the force transmission block drives the movable contact to move toward the static contact, and the opening of the closing gate faces the notch downward, and the right end of the toggle lever is provided with a hinged structure for hinged connection with the power output shaft of the corresponding operating mechanism. When the closing transmission mechanism of the present invention needs to be tripped, since the notch and the load-bearing shoulder of the force transmission block are push fit, it is only necessary to apply an upward force to the toggle lever to turn the toggle lever upward The notch is separated from the load-bearing shoulder of the force-transmitting block, which is convenient for tripping, and the notch is directly arranged on the toggle lever, and the load-bearing shoulder is arranged on the force-transmitting block, which has a simple structure and is convenient for disassembly and maintenance.

Description

technical field [0001] The invention relates to the technical field of medium and low voltage switches, in particular to a closing transmission mechanism, an operating mechanism and a circuit breaker using the transmission mechanism. Background technique [0002] Due to the unique advantages of DC power supply, many important industries such as urban rail transit, mining, metallurgy, and ship power in my country have adopted DC power supply systems. The circuit breaker is the most important protection device in the DC power supply system. With the continuous improvement of the living standards of Chinese residents and the development of power supply modernization, higher requirements are put forward for the reliability of the operation of the circuit breaker. [0003] At present, the operating mechanisms widely used in circuit breakers include return spring operating mechanisms and electromagnetic operating mechanisms. The return spring operating mechanisms have many parts, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the operating mechanisms widely used in circuit breakers include return spring operating mechanisms and electromagnetic operating mechanisms. The return spring operating mechanisms have many parts, complex structures, low reliability and service life, so the application of electromagnetic operating mechanisms is more widely

There is a closing transmission mechanism between the output shaft of the electromagnetic operating mechanism and the moving contact, but the current closing transmission mechanism often has the problems of complex structure and inconvenient tripping, and when the circuit breaker operates too frequently, it will Unreliable movement occurs

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