Motorized wheel

摘要

A wheelchair has each of its rear wheels motorized. The hub of each wheel contains an electric motor and a pinion driven thereby and these are carried on a swingable plate pivotally mounted on a fixed plate attached to the body of the wheelchair. Each hub has fixed thereto co-axially an internally toothed annulus. Provided at each wheel is a mutual lever attached to an eccentric and turnable to cause the eccentric to turn the swingable plate and thereby to bring the pinion into and out of driving engagement with the annulus.