US 12,218,559 B2
Drive apparatus
Daiki Shimogai, Kyoto (JP); Takashi Shiraishi, Kyoto (JP); and Takaya Tamaki, Kyoto (JP)
Assigned to NIDEC CORPORATION, Kyoto (JP)
Filed by NIDEC CORPORATION, Kyoto (JP)
Filed on Sep. 8, 2022, as Appl. No. 17/939,958.
Claims priority of application No. 2021-147773 (JP), filed on Sep. 10, 2021.
Prior Publication US 2023/0085414 A1, Mar. 16, 2023
Int. Cl. H02K 5/20 (2006.01); B23Q 11/12 (2006.01); F16C 33/66 (2006.01); H02K 5/14 (2006.01); H02K 5/173 (2006.01); H02K 7/06 (2006.01); H02K 7/08 (2006.01); H02K 7/116 (2006.01); H02K 9/193 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 5/145 (2013.01); H02K 7/083 (2013.01); H02K 7/116 (2013.01); H02K 9/193 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A drive apparatus comprising:
a motor having a motor shaft that rotates about a motor axis;
a bearing that rotatably supports the motor shaft;
a housing that accommodates the motor therein and holds the bearing in a bearing holding portion;
an insulating member interposed between the bearing and the bearing holding portion; and
an oil passage through which the oil flows, wherein
the bearing holding portion includes:
a holding tubular portion that holds the bearing from radially outside; and
a holding bottom portion extending radially inward from an end portion on one side in an axial direction of the holding tubular portion,
the insulating member includes:
an insulating tubular portion extending in the axial direction along the holding tubular portion; and
an insulating bottom portion located at an end portion on one side in the axial direction of the holding bottom portion and extending in a radial direction along the holding bottom portion,
the holding tubular portion is provided with a penetrating portion penetrating radially inside and outside, and
the oil passage includes:
a first channel disposed in an inside of the penetrating portion; and
a second channel connecting the first channel and the bearing, wherein
the insulating bottom portion is provided with a slit extending in a radial direction, and the second channel is disposed in an inside of the slit.