| 摘要 |
PROBLEM TO BE SOLVED: To provide a power transmission device which can reduce the number of part items, and is reducible in size.SOLUTION: A power transmission device 1 comprises: a first sun gear 10 being an outer gear; a second sun gear 20 being an inner gear; a planetary gear 30 having a cylindrical inner face 34a which extends to a center axial line Ac between inner teeth 32 and outer teeth 33; a cylinder member 44 which is relatively rotatably arranged with respect to the planetary gear 30 around rotation axial lines Af1, Af2 which pass through a center Cy of the cylindrical inner face 34a; and carrier main bodies 41, 42 which rotatably support the cylinder member 44 around a support axial line As in a state that the rotation axial lines Af1, Af2 of the cylinder member 44 are decentered with respect to the support axial line As.SELECTED DRAWING: Figure 1 |
