CPC F16H 57/027 (2013.01) [F16H 1/28 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02052 (2013.01)] | 8 Claims |
1. A power transmission device comprising:
a motor;
a planetary gear mechanism having a portion that overlaps the motor in an axial direction;
an axial direction wall part having a portion positioned between the planetary gear mechanism and the motor;
a plate provided between the axial direction wall part and a pinion gear of the gear mechanism; and
a box in which the motor, the planetary gear mechanism, the axial direction wall part, and the plate are housed, wherein
the box defines a breather hole that communicates with a breather chamber,
the box has a radial direction wall part having a portion positioned between the plate and the breather chamber in a radial direction, and
the plate has a portion positioned between the pinion gear and the breather hole.
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