US 12,424,906 B2
Cooling structure of in-wheel motor
Hideaki Miyazono, Kasugai (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Feb. 22, 2023, as Appl. No. 18/112,706.
Claims priority of application No. 2022-063460 (JP), filed on Apr. 6, 2022.
Prior Publication US 2023/0327519 A1, Oct. 12, 2023
Int. Cl. H02K 9/19 (2006.01); B60K 7/00 (2006.01); H02K 9/10 (2006.01); H02K 9/12 (2006.01)
CPC H02K 9/19 (2013.01) [B60K 7/0007 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A cooling structure of an in-wheel motor, the cooling structure being provided in a wheel of a tire-wheel assembly, the cooling structure comprising:
a rotary electric machine configured to rotate a hub to which the wheel is fixed;
a knuckle provided with a plurality of flow paths through which a coolant for cooling the rotary electric machine flows, and the knuckle supporting the hub such that the hub is rotatable; and
a pump configured to circulate the coolant to and from the rotary electric machine through the flow paths provided inside the knuckle, the pump including (i) a fixed portion provided in an outer race of a hub bearing interposed between the hub and the knuckle, and (ii) a rotating portion provided in the hub.