| 摘要 |
A redundant drive mechanism (10) comprises a platform (16) and a shaft (30) rotatably mounted with respect to the platform (16). A first motor (42) is stationarily mounted with respect to the platform (16). The first motor (42) drives a first pinion (50). A ring gear carrier (56) is mounted on the shaft (30) and is rotationally fixed to the shaft (30). A ring gear (62) is rotatably mounted on the ring gear carrier (56). The first pinion (50) is in gear-tooth engagement with the ring gear (62). A second motor (44) is mounted on the ring gear carrier (56). The second motor (44) drives a second pinion (52) which, in turn, is in gear-tooth engagement with the ring gear (62). Energization of either the first or second motor (42, 44) causes rotation of the shaft (30) with respect to the platform (16). |
