US 12,341,383 B2
Rotor
Kenichiro Hayashi, Ohbu (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on May 3, 2023, as Appl. No. 18/142,683.
Claims priority of application No. 2022-104924 (JP), filed on Jun. 29, 2022.
Prior Publication US 2024/0006940 A1, Jan. 4, 2024
Int. Cl. H02K 1/28 (2006.01); H02K 7/00 (2006.01)
CPC H02K 1/28 (2013.01) [H02K 7/003 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A rotor comprising:
a rotor core provided with a through hole; and
a shaft fitted into the through hole, wherein:
the shaft includes an arc-shaped outer peripheral portion extending along a center of the through hole, and a flat surface portion linearly cutting out at least part of a circle of the outer peripheral portion in a section orthogonal to an extending direction of the center;
the through hole of the rotor core includes an inner peripheral portion that faces and is separated from the outer peripheral portion and the flat surface portion to provide a space portion, at least one first contact portion that is provided in the inner peripheral portion and directed toward the center and contacts the flat surface portion, and two or more second contact portions that are provided in the inner peripheral portion and directed toward the center at positions away from the first contact portion and contact the outer peripheral portion; and
the rotor core includes the first contact portion and the second contact portions at respective positions symmetrical with respect to a first reference plane that is orthogonal to the flat surface portion and extends through the center, and a second reference plane extending through the center and being orthogonal to the first reference plane between the first contact portion and the second contact portions.