| 摘要 |
A planetary gear drive comprises two stages. Each of two stages comprises a central sun gear, a crown gear, several satellites located on a carrier between the sun gear and the crown gear, input and output shafts. The sun gear of the first and second stages is rigidly connected to each other. The input shaft is rigidly connected with the sun gear of the first stage. The carriers of the first and the second stages are rigidly connected to each other and, the output shaft is rigidly connected with the crown gear of the second stage (first embodiment). The crown gears of the first and the second stages are rigidly connected to each other, and the output shaft is rigidly connected with the carrier of the second stage (second embodiment). The satellites are at least at one stage are unevenly distributed around.
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