CLUTCH DEVICE OF GEAR TRANSMISSION SYSTEM OF CIRCUIT BREAKER SPRING OPERATING MECHANISM

摘要

A clutch device of a gear transmission system of a circuit breaker spring operating mechanism comprises an energy storage shaft (1) a large gear (4) and a small gear (5). At an energy storage holding position of the large gear a tooth missing and special teeth area is arranged corresponding to the small gear. In a cavity in the large gear in the area and a backward extended part a clutch cam (6) whose resetting is driven by a resetting spring (3) is disposed. In the area the large gear comprises a first special tooth (4a) a second special tooth (4c) and a space (4b) between the first and second special teeth. When energy storage is completed the small gear pushes the first special tooth to push the large gear and energy storage shaft to the energy storage holding position that is separated from a friction dead zone and the small gear and large gear automatically disengage from each other. When the energy storage holding position is reached during energy storage the small gear rotates due to inertia and stops at any possible position. When the large gear is quickly rotated after switch on the small gear and large gear can reliably and stably reengage with each other. In any situation phenomena such as jamming of the large and small gears and a switch on failure are not likely to occur.