| 摘要 |
<p>A mechanical four-speed gearbox/drive system for household appliances comprising two drive-outlets (9,17); each drive-outlet driven at two different speeds in the same rotational direction; a motor (1), motor shaft (2), first drive-outlet (9) and second drive-outlet (17), with installation of one-way bearings (5,6,8) in suitable places in the gear-train. The motor drives two drive-outlets and rotates in clockwise and counter-clockwise directions through three one-way bearings (5,6,8) and two gear down systems (a1,a2) to provide four different speed drives. When operating in hi-speed mode, the first drive-outlet (9) is directly driven by the motor (1). When operating in lo-speed mode, the first drive-outlet is driven via the gear down system (a1), with resulting increase in torque. Simultaneously, second drive-outlet (17) is driven via second gear down system (a2) to provide two different speed drives. This gearbox is simple to construct and operable without expensive control electronics. In applications with electronic motor speed and directional control, much broader and practical drive-outlet speed ranges are achieved.</p> |
