| 摘要 |
A planetary gear has at least two, first and second gears having different numbers of teeth. One of sun outer gears or sun inner gears having two fundamental axes has at least two, third and fourth gears capable of respectively meshing with the first and second gears of the planetary gear and of rotating relative to each other. The ratio of the numbers of the teeth of the first gear and the third gear is different from that of the second gear and the fourth gear. The other of sun outer or sun inner gears having one fundamental shaft coaxially integrally has at least two, fifth and sixth gears respectively meshing with the first and second gears. |
