Patent ID: 11906034
Assignee: NIDEC CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 12:
13. A drive apparatus, comprising:
a motor portion having a motor shaft rotatable about a first axis extending in a first direction;
a deceleration device connected to a portion of the motor shaft which is located on a first side in the first direction;
a differential device connected to the deceleration device;
a reservoir configured to store a fluid; and
a gear housing configured to accommodate the deceleration device, the differential device, and the reservoir,
wherein
the deceleration device includes a counter gear rotatable about a second axis extending in the first direction,
the differential device includes a ring gear rotatable in a direction opposite to the counter gear about a third axis extending in the first direction,
an inner surface of the gear housing includes:
a first curved surface disposed on a first side in a second direction perpendicular to the first direction with respect to the third axis, and
a second curved surface disposed on the first side in the second direction with respect to the second axis,

at least a part of the first curved surface extends in a circumferential direction so as to face a radially outer end portion of the ring gear in a radial direction,
at least a part of the second curved surface extends in the circumferential direction while radially facing a radially outer end portion of the counter gear,
a position of a first portion of the reservoir on a second side in the first direction overlaps the first curved surface, the second side opposite the first side in the first direction,
a position of a second portion of the reservoir on the first side in the first direction overlaps the second curved surface,
the first curved surface is offset in the first direction from the second curved surface,
the reservoir is disposed on a first side in a third direction with respect to the second axis,
the third direction is perpendicular to the first direction and the second direction,
the second curved surface includes:
a first surface extending in the circumferential direction along the radially outer end portion of the counter gear, and
a second surface extending from a first end portion of the first surface which is located on the first side in the third direction toward the first side in the third direction, and

a third end portion of the second curved surface which is located on the first side in the third direction is disposed on the first side in the third direction with respect to the reservoir.