US 11,859,707 B2
Power transmission device
Yusuke Suzuki, Shizuoka (JP); Takayoshi Urushibata, Shizuoka (JP); and Kenjiro Yasui, Shizuoka (JP)
Assigned to Jatco Ltd, Fuji (JP)
Appl. No. 17/789,369
Filed by JATCO LTD, Fuij (JP)
PCT Filed Dec. 7, 2020, PCT No. PCT/JP2020/045432
§ 371(c)(1), (2) Date Jun. 27, 2022,
PCT Pub. No. WO2021/137290, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 2019-240057 (JP), filed on Dec. 30, 2019.
Prior Publication US 2023/0068579 A1, Mar. 2, 2023
Int. Cl. F16H 57/02 (2012.01); F16H 57/027 (2012.01); F16H 1/28 (2006.01)
CPC F16H 57/027 (2013.01) [F16H 1/28 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02052 (2013.01)] 8 Claims
OG exemplary drawing
 
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.