| 摘要 |
PROBLEM TO BE SOLVED: To provide a power transmission device that can facilitate the design and change of gear specifications and reduce manufacturing costs.SOLUTION: A power transmission device 1 comprises: a first sun gear 11 that is an external gear; a second sun gear 12 and a third sun gear 13 that are internal gears; a first transmission member 41 laid on an outer periphery of the first sun gear and an outer periphery of a first wheel member; a first planet gear 51; a second transmission member 42 laid on outer peripheries of a plurality of second wheel members; a second planet gear 52; and a carrier 60 that rotatably supports the first wheel member, the first planet gear, the plurality of second wheel members, and the second planet gear.SELECTED DRAWING: Figure 1 |
