| 摘要 |
A dual speed drive system for alternatively driving a pair of parallel output shafts at one or the other of two different speeds, comprises a pair of parallel idler shafts interposed between the output shafts. A first gear train for mechanically couples the idler shafts to each other and to the output shafts. An input shaft is aligned coaxially with and rotatable independently of one of the idler shafts, and first and second drive gears are respectively received on and are rotatable relative to the input shaft and the one idler shaft. A second gear train mechanically couples the first drive gear to the second drive gear. The second gear train is configured and arranged to effect rotation of the second drive gear in the same direction as and at a different speed from that of the first drive gear. A clutch assembly is adjustable between a first speed mode in which the input shaft and the one idler shaft are rotatably fixed to each other and are rotatable in the same direction and at the same speed in relation respectively to the first and second drive gears, and a second speed mode in which the input shaft and the one idler shaft are independently rotatable and rotatably fixed respectively to the first and second drive gears, whereby rotation of the input shaft results in rotation of the one idler shaft in the same direction and at a different speed from that of the input shaft. |
