| 摘要 |
<p>The reduction gearbox device of the nested planetary gear set (34; 40; 46; 52) type comprises an input gear (12), a fixed annulus (14) and an output annulus (18) secured to an output shaft (22), these all being coaxial, and stepped gears (24a, 24b, 24c) evenly circumferentially distributed and comprising first and second toothset parts (26a, 26b, 26c, 28a, 28b, 28c) of different diameters in contact with the fixed annulus (14) and the output annulus (18), respectively. The input gear (12) is in contact with the first or the second toothset part (26a, 26b, 26c, 28a, 28b, 28c). The reduction gearbox device is notable in that the stepped gears (24a, 24b, 24c) run on means, inserted between the stepped gears (24a, 24b, 24c) and designed to maintain the relative positions of the stepped gears (24a, 24b, 24c) relative to one another.</p> |
