DRAW IN-OUT APPARATUS FOR AIR CIRCUIT BREAKER

摘要

Disclosed is a draw in-out apparatus that is suitable for an air circuit breaker having large capacity and size, the apparatus comprising: a movable plate meshed with the thread portion of a spindle so as to be movable back and forth; rack gear installed on the movable plate so as to be movable back and forth along with the movable plate moving back and forth; pinion gear installed to be meshed with the rack gear and rotatable according to the rack gear moving back and forth; a cam rotatable by a rotational driving force transferred from the pinion gear by being provided with a teeth portion meshed with the pinion gear and having a radius larger than those of the pinion gear so as to amplify a torque transferred from the pinion gear and provided with a cam slot portion for enduring a load of the main body and a reaction force generated when the main body and the cradle are electrically connected to each other while the main body is moved to a connected position; a pivot disposed on the cradle at a position adjacent to the middle of a height between electric terminals of the cradle so as for the cam to effectively endure the load of the main body and the reaction force generated when the main body and the cradle are electrically connected to each other; and a driving protruding portion extended from the main body with moving together with the main body and connected to the cam thus to transfer a driving force from the cam to the main body.