Transmission device and circuit breaker by using same

Abstract

The invention provides a clutch type transmission device with a simple structure, convenient use and a high switching-on speed and a circuit breaker by using the same. The transmission device comprises a spring shell and a driving shell, wherein the spring shell is connected with the driving shell, a movable shaft is arranged in the spring shell in a sliding and penetrating way in the length direction of the spring shell, a drive spring capable of compressing and return along with the sliding of the movable shaft is arranged between the movable shaft and the spring shell, the movable shaft comprises a first position used for storing elastic energy by compressing the drive spring to take as the power source of the switching-on operation of the circuit breaker, the movable shaft comprises asecond position used for releasing the elastic energy stored by the drive spring, the driving shell is internally provided with a driving piece used for driving the movable shaft to slide, and the driving piece is arranged with the movable shaft in a separating and combining mode.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a transmission device and a circuit breaker using the transmission device. Background technique [0002] Air circuit breakers and vacuum circuit breakers use mechanical actuators for opening or closing circuits, respectively. Here, the vacuum circuit breaker is installed on an incoming side of a large-scale power system, and is configured to open or close a power circuit applied with a higher rated voltage than a general circuit breaker. And, the air circuit breaker is configured to open or close a power circuit to which a higher voltage or extra high voltage is applied. [0003] When a fault current occurs in the power circuit, the power circuit has to be cut off instantaneously. In this case, spring drives utilizing the elastic energy of springs are commonly used as mechanical drives. More specifically, in a circuit breaker used to open or close a power circuit applied wi...

AI Technical Summary

Problems solved by technology

[0005] The elastic energy stored when the pressure spring is compressed is used as the closing power source. Since the linear movable shaft is connected to the ratchet through a rigid joint, that is, one end of the rigid joint is hinged to the linear movable shaft, and the other end of the rigid joint is hinged to the ratchet. When the latch When the lock mechanism releases the ratchet, the linear movable shaft rebounds under the action of the closing spring and closes the brake. When the linear movable shaft is closed, it will drive the ratchet to rotate through the rigid connection, so that part of the elastic energy is converted into the kinetic energy of the ratchet. This reduces the utilization rate of elastic energy, and at the same time leads to slow closing speed, resulting in delayed closing, and will affect the deformation of the pressure spring, reducing its service life

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