US 12,115,859 B2
In-wheel motor
Haerim Yang, Seoul (KR); Seung-Suk Oh, Seoul (KR); and Yeongjae Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Nov. 9, 2020, as Appl. No. 17/092,988.
Claims priority of application No. 10-2019-0175610 (KR), filed on Dec. 26, 2019.
Prior Publication US 2021/0178893 A1, Jun. 17, 2021
Int. Cl. B60K 7/00 (2006.01); B60K 17/04 (2006.01); F16C 3/02 (2006.01); H02K 7/00 (2006.01); H02K 7/08 (2006.01); H02K 7/116 (2006.01)
CPC B60K 7/0007 (2013.01) [B60K 17/046 (2013.01); F16C 3/02 (2013.01); H02K 7/003 (2013.01); H02K 7/006 (2013.01); H02K 7/088 (2013.01); H02K 7/116 (2013.01); B60K 2007/0038 (2013.01); B60K 2007/0092 (2013.01); F16C 2326/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An in-wheel motor, comprising:
a circular rim having an outer ring capable of coupling to a tire;
a shaft connected to the rim through a center of the rim;
a motor assembly comprising a stator connected to the shaft in the rim and a rotor surrounding the stator to rotate about the stator;
a cover coupled to an opening of the rim to block the motor assembly disposed inside the rim from an environment outside of the rim and having a center through which the shaft passes; and
a bearing positionally constrained to an inside of the cover and supporting the shaft,
wherein the shaft comprises:
a first shaft body passing through the center of each of the rim and the cover and extending outward from the rim; and
a second shaft body having a larger diameter than a diameter of the first shaft body, and
wherein a power line for supplying power to the motor assembly is inserted into the second shaft body between the stator and the bearing in a radial direction and is extended in a longitudinal direction of the second shaft body,
wherein the second shaft body comprises:
a first end portion defining a stator contact surface to which the stator contacts; and
a second end portion defining a bearing contact surface to which the bearing contacts,
wherein the second shaft body comprises:
a first hole defined between the stator contact surface and the bearing contact surface, defined in the radial direction of the second shaft body in which the power line from the stator is inserted, and
a second hole intersecting with the first hole and defined in the longitudinal direction of the second shaft body to take out the power line inserted through the first hole,
wherein the second hole is spaced apart from the first shaft body and is defined at a position closer to an inner diameter of the bearing than the first shaft body.