US 11,767,907 B2
Power transmission device
Kenjiro Yasui, Shizuoka (JP); Yusuke Suzuki, Shizuoka (JP); and Takayoshi Urushibata, Shizuoka (JP)
Assigned to Jatco Ltd, Fuji (JP); and Nissan Motor Co., Ltd., Yokohama (JP)
Appl. No. 17/791,679
Filed by JATCO LTD, Fuij (JP); and Nissan Motor Co., Ltd., Yokohama (JP)
PCT Filed Dec. 23, 2020, PCT No. PCT/JP2020/048067
§ 371(c)(1), (2) Date Jul. 8, 2022,
PCT Pub. No. WO2021/157235, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 2020-018993 (JP), filed on Feb. 6, 2020.
Prior Publication US 2023/0044631 A1, Feb. 9, 2023
Int. Cl. F16H 57/04 (2010.01); F16H 57/037 (2012.01); F16H 57/02 (2012.01)
CPC F16H 57/0415 (2013.01) [F16H 57/037 (2013.01); F16H 57/0482 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02052 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power transmission device comprising:
a motor;
a gear mechanism connected downstream of the motor, the gear mechanism being lubricated by oil; and
a box having
a wall part that covers an outer circumference of the gear mechanism, and
a jacket part that covers an outer circumference of the wall part,
a cooling chamber, in which cooling liquid is introduced, being formed between the wall part and the jacket part, wherein
the cooling chamber includes a portion that overlaps with the gear mechanism when seen from a radial direction, and a portion that overlaps the gear mechanism when seen from an axial direction.