Self-propelled vacuum cleaner

摘要

An upright vacuum cleaner has a single motor on the body thereof, for rotating the vacuum producing fan blade, for rotating the rotary brush, as well as for driving the wheels by way of a clutch. The clutch is driven from the motor shaft by way of Evoloid gearing and a continuously driven bevel pinion, to drive oppositely rotating bevel gears. The handle grip of the cleaner is slidable along the end of the shaft or rod between the handle and the body, and controls a Bowden cable to effect the movement of a pair of clutch plates with respect to corresponding bevel gears, thereby to drive wheels on the body in a reversible manner.