| 摘要 |
PROBLEM TO BE SOLVED: To provide a reduction gear which is high in a reduction rate and easy in design and manufacturing. ! SOLUTION: A second input shaft 22 of a second planetary gear mechanism 21 is arranged so as to rotatably penetrate a first input shaft 12 of a first planetary gear mechanism 11, a first internal gear 14 and a second internal gear 24 of both the planetary gear mechanisms 11, 21 are integrally formed, a first carrier 16 of the first planetary gear mechanism 11 is fixed to a housing 1, a second carrier 26 of the second planetary gear mechanism 21 is connected to an output shaft 2, and different numbers of rotations are input to the first input shaft 12 and the second input shaft 22. By this constitution, by properly setting a difference between the rotation numbers of both the input shafts 12, 22, a very high reduction rate can be obtained, and by making gear specifications of both the planetary gear mechanisms 11, 21 be the same, the gear design and component manufacturing of the planet |
