Switch-on transmission mechanism and operating mechanism applying same and breaker applying same

Abstract

The invention discloses a switch-on transmission mechanism and an operating mechanism applying the switch-on transmission mechanism and a breaker applying the switch-on transmission mechanism. The switch-on transmission mechanism comprises poking rods and transmission blocks, wherein the transmission blocks and corresponding moving contacts are fixedly arranged together. The transmission blocks are located below the poking rods and are provided with bearing shoulders facing the poking rods. The poking rods are provided with concave openings with openings facing downwards, wherein the concave openings are used for being matched with the bearing shoulders of the transmission blocks in a jacking mode to push the transmission blocks to drive the moving contacts to move towards fixed contacts so as to achieve switch-on when the poking rods move leftwards. The right ends of the poking rods are provided with a hinge structure for being hinged to a power output shaft of the corresponding operating mechanism. According to the switch-on transmission mechanism, when the switch-on transmission mechanism needs to be disengaged, the concave openings are matched with the bearing shoulders of the transmission blocks in the jacking mode, so that only upward action force needs to be applied on the poking rods to turn the poking rods upwards, and then the concave openings can be separated from the bearing shoulders of the transmission blocks; disengaging is convenient to conduct, the concave openings are formed in the poking rods directly, the bearing shoulders are arranged on the transmission blocks directly, and the switch-on transmission mechanism is simple in structure and convenient to assemble, disassemble and maintain.

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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