| 摘要 |
Herein disclosed is a power transmission which comprises: two housings coupled to rotate relative to each other; an input shaft rotatably borne in one of the housings; an output shaft rotatably borne in the other housing; two transmission paths coaxially arranged on the axis of the relative rotations of the two housings; a first transmission mechanism for transmitting rotations between the input shaft or the output shaft and the two transmission paths to rotate the two transmission paths in opposite directions; and a second transmission mechanism for transmitting rotations between the other of the input shaft or the output shaft and the two transmission paths to rotate the two transmission paths in the opposite directions and for absorbing the difference, which is caused by the relative rotations of the two housings, between the rotating speeds of the two transmission paths.
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