CONVEYOR DRIVE EMERGENCY CUTOUT DEVICE Russian patent published in 1994 - IPC

FIELD: industrial transportation systems. SUBSTANCE: device has limit switch coupled with drive and arranged between drive shaft and driving sprocket hub, and bushing. Bushing is coupled with shaft by means of key and with sprocket hub by means of destructible member and is installed for engagement with limit switch. Device has also mechanism to provide axial travel of bushing relative to drive shaft and support ring arranged on drive shaft, peripheral part of support ring being arranged in hub groove. Bushing axial travel-motion mechanism is made in form of circular groove made on end of bushing pointed to thrust ring and shaped groove communicating with circular groove and consisting of two convergent symmetrical spiral grooves of half-a-turn length and projecting member installed in place of convergence of grooves, with minimum clearance between walls of grooves and member. Member is secured on inner surface of driving sprocket hub. EFFECT: enhanced reliability. 1 dwg