US 12,455,004 B2
Drive unit
Marina Hirata, Toyota (JP); Akitaka Ichikawa, Nisshin (JP); Hiroshi Kawanishi, Nisshin (JP); Tsukasa Sakamaki, Toyota (JP); Shohei Nagata, Nisshin (JP); Takayoshi Hanai, Kariya (JP); and Teppei Yamashita, Kariya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and AISIN CORPORATION, Kariya (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and AISIN CORPORATION, Aichi (JP)
Filed on Nov. 9, 2023, as Appl. No. 18/505,585.
Claims priority of application No. 2022-186789 (JP), filed on Nov. 22, 2022.
Prior Publication US 2024/0167559 A1, May 23, 2024
Int. Cl. F16H 57/04 (2010.01); H02K 7/116 (2006.01)
CPC F16H 57/0424 (2013.01) [H02K 7/116 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A drive unit, comprising:
a case comprising an electric motor chamber and a gear chamber;
an electric motor comprising a rotor housed in the electric motor chamber;
a specific gear housed in the gear chamber and configured to rotate with rotation of the rotor;
lubricant stored in the electric motor chamber and the gear chamber; and
a through hole connecting the electric motor chamber and the gear chamber and configured to allow the lubricant to flow from the electric motor chamber to the gear chamber when the rotor rotates,
wherein
an opening of the through hole on a gear chamber side is positioned so as to face a side surface of the specific gear,
a region below a center of the specific gear is defined as a lower region, a part of the lower region that is located rearward of a vertical plane passing through a center axis of the specific gear in a rotation direction of the specific gear is defined as a lower rear region, and the opening is in the lower rear region.