WHEEL WINCH

摘要

The invention provides a wheel winch for releasably securing a wheel to the underside of a vehicle floor. The winch comprises: a housing; a drum mounted for rotation in the housing; a cable having one end fastened to the drum and another end for engaging a wheel; and a gear arrangement for providing a rotational drive to the drum so as to wind/unwind the cable around the drum. In one aspect, the gear arrangement comprises an eccentrically driven orbital gear member including a plurality of axially extending pegs that extend into corresponding recesses in the housing. The pegs engage walls of the recesses to provide a reaction to applied loads and a frictional resistance to movement therebetween. In one aspect, a rotatable input shaft provides a rotational drive to the drum through a tolerance ring configured to slip at a predetermined level of torque.