Crank handle device of pull-out type breaker

Abstract

The invention provides a rocking handle device of a drawout breaker, which is provided with a relatively concealed double locking mechanism, thus not only improving the reliability of the locking but also being capable of preventing from incorrect manipulation of the rocking handle. In addition, the arm of force of a rotating crank can be prolonged without increasing the panel space, so that the manipulations of pulling out and pushing in of the breaker body can be guaranteed to be reliable, convenient and labor saving. The rocking handle device of the breaker of the invention comprises a crank, a holding locking groove and a drawout locking groove are arranged at the two ends of the rocking handle device; a locating piece comprising blocking heads which are respectively used for blockingthe holding locking groove and puling out the drawout locking groove, and a locating slant which is connected with a locating elastic device, a button which is provided with a button slant, the button slant is provided with a first resetting elastic device, the slant part of the button slant and the slant part of the locating slant are opposite to each other and can mutually contact; a lock plateis provided with a lug boss which can mutually support or can separate from the locating piece when the lock plate moves.

Description

technical field [0001] The invention relates to a crank device of a withdrawable circuit breaker, in particular to a hidden retractable crank device. Background technique [0002] Withdrawable circuit breaker is a commonly used circuit breaker. It places a withdrawable or pushable circuit breaker body on a solid drawer base. There is a storage box on the panel of the circuit breaker body for placing the circuit breaker. crank handle. [0003] Chinese patent CN02808698 discloses a rocker device for a circuit breaker. Such as figure 1 As shown, it includes a crank 51, one end of the crank 51 is connected with a drive shaft, turning the crank 51 makes the drive shaft rotate, thereby driving the turbine to rotate, and realizing the extraction or push of the circuit breaker body (not shown). The other end of the crank 51 is connected with one end of the connecting rod 52 , and the other end of the connecting rod 52 is connected with a handle 53 . Also be provided with a locki...

AI Technical Summary

Problems solved by technology

[0005] However, since the locking lever is exposed outside the panel, it is still possible to cause the crank to leave its locked position due to inadvertent operation; in addition, due to the limited space on the panel of the circuit breaker, the connecting rod in the crank device is usually short, and the operator turns the crank relatively laborious

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