Connecting rod assembly of breaker operating mechanism

Abstract

The invention provides a connecting rod assembly of a circuit breaker operating mechanism. The connecting rod assembly comprises a pair of side plates, a rotating shaft assembly, a connecting rod assembly arranged between the pair of side plates, and an opening half shaft. According to the connecting rod assembly of the circuit breaker operating mechanism provided by the invention, the fulcrum shaft of the switching lever of the opening tripping system and the cam shaft of the energy storage system are split into the switching lever fulcrum shaft and the cam shaft which are independent from each other from the original same shaft, so that the problems that the switching lever is overlong in span, low in rigidity and easy to fail during fatigue stress are solved; meanwhile, the swing amplitude of the conversion lever during tripping can be reduced, and the occupied space of a tripping system can be reduced.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a transmission structure of an operating mechanism of a circuit breaker. Background technique [0002] In the operating mechanism of the energy storage switch / circuit breaker of low-voltage electrical appliances, the transmission mechanism is an important part to realize the closing and opening actions. As a kind of power distribution equipment, the circuit breaker is responsible for protecting the electrical equipment in the grid, that is, when a fault occurs in the grid, for example, when there is a short-circuit current or a fault current, the circuit breaker breaks the current to protect the electrical equipment in the grid and personnel safety. In order to achieve the above protection function, an operating mechanism is provided inside the circuit breaker, which can separate the dynamic and static contacts of the circuit breaker by controlling the movement o...

AI Technical Summary

Problems solved by technology

[0004] 1. The switching lever span of the opening and tripping system is too long, the rigidity is low, and it is easy to fail after fatigue stress

Because the conversion lever and the camshaft share the same shaft in the prior art, it is necessary to ensure that the connecting rod does not interfere with the energy storage lever assembly and the camshaft when moving, so the structural design is destined to have a long span of the conversion lever and low rigidity, and Cannot be optimized on the original structure space

[0005] 2. In the opening and tripping system, the roller of the double-pole lever and the conversion lever cooperate with each other. When tripping, the conversion lever swings too much, takes up too much space, and compresses the volume of other parts, which is not conducive to the layout.

[0006] 3. Due to the limited design space in the opening and tripping system, the roller shaft in contact with the double-knife lever and the conversion lever is thin and easy to break

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