| 摘要 |
A vacuum cleaner motor assembly comprises a motor in a bucket (32), arranged to drive a fan to provide airflow. An epicyclic gear system (34) is attached to the output shaft (33) of the motor, to produce an output of reduced rotational speed. The output is employed to drive an agitator via a belt. Th e belt is driven at a reduced rotational speed to that achievable hitherto, an d thus there is reduced wear on the belt. The provision of a gear arrangement mounted directly to the motor casing provides a compact assembly. One of the epicyclic gears, such as the ring gear (39), is arranged to slip with respec t to a clutch member (41) if the agitator becomes jammed. An actuator (50) switches off the motor if the heat of friction of the slipping gear exceeds a predetermined value, or if the slipping gear rotates at a speed above a predetermined value. Thus, the motor switches off before damage occurs to an y of the components of the system. |
