Switchgear and switchgear operating mechanism

摘要

A switchgear operating mechanism has: a ratchet wheel that rotates together with a closing shaft; a stop lever that enables contact between an energy storing cam and a roller; a motor that transmits power to a feed lever; a feed pawl; stop pawls that suppresses reverse rotation of the feed pawl; a closing lever that expands/contracts a closing spring; a catch mechanism for energy storage for the closing lever; a closing cam; a stopper unit that suppresses rotation of the stop lever; a first sprocket; second and third sprockets that are capable of rotating together with an intermediate shaft; a fourth sprocket rotatably fastened to an energy storing cam shaft; a first chain that engages with the first and second sprockets; and a second chain that engages with the third and fourth sprockets.

主权项

1. A switchgear operating mechanism for reciprocatively driving a movable contact of a switchgear so as to shift the switchgear between a cutoff state and a closed state, the switchgear operating mechanism comprising:
a support structure; a closing shaft extending in a first rotation axis direction to be rotatably supported by the support structure; a ratchet wheel having substantially a disk-like shape, having a plurality of outer peripheral teeth formed along an outer peripheral side surface thereof and fixed to the closing shaft to be rotated together with the closing shaft; a feed lever having a plate-like shape, juxtaposed to the ratchet wheel in an axial direction thereof so as to be swingable about the closing shaft in a peripheral direction and provided with, near an outer periphery thereof, a feed lever roller rotatable about a second rotation axis extending in parallel to the closing shaft; a stop lever having a plate-like shape, juxtaposed to the feed lever in the first rotation axis direction so as to be swingable about the closing shaft in a peripheral direction and provided with, near an outer periphery thereof, an energy storing cam rotatable about an energy storing cam shaft extending in parallel to the closing shaft, the energy storing cam being contactable with a periphery of the feed lever roller; a motor fixed to the support structure and configured to transmit power for swinging the feed lever; a feed pawl fixed to the feed lever so as to be engageable with the outer peripheral teeth and configured to transmit the power from the motor to the ratchet wheel to rotate the ratchet wheel and the closing shaft in at least one direction; a plurality of stop pawls fixed to the stop lever and engaged with the ratchet wheel so as to prevent the ratchet wheel and the closing shaft from being rotated in a reverse direction to the one direction; a closing spring configured to be expanded/contracted with rotation of the closing shaft; a closing lever fixed to the closing shaft and configured to have the closing spring expand/contract by rotation of the closing shaft; a catch mechanism configured to maintain an energy storing state of the closing spring; a closing cam fixed to the closing shaft to be rotated together with the closing shaft; a first sprocket fixed to an output shaft of the motor; a sprocket base fixed to the support structure; an intermediate shaft rotatably supported by the sprocket base; a second sprocket fixed to the intermediate shaft so as to be rotatable together with the intermediate shaft; a third sprocket fixed to the intermediate shaft so as to be rotatable together with the intermediate shaft; a fourth sprocket rotatably fixed to the energy storing cam shaft; a first chain meshed with the first and the second sprockets; and a second chain meshed with the third and the fourth sprockets.