US 12,068,643 B2
Manufacturing method for rotary electric machine rotor
Takeru Morita, Kariya (JP); Shigeki Ideue, Kariya (JP); Yuta Watanabe, Kariya (JP); Kenji Dozono, Kariya (JP); Masashi Ikemura, Toyota (JP); and Toshihiko Kamiya, Toyota (JP)
Assigned to AISIN CORPORATION, Kariya (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Appl. No. 17/417,681
Filed by AISIN CORPORATION, Aichi (JP); and TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
PCT Filed Jan. 28, 2020, PCT No. PCT/JP2020/002989
§ 371(c)(1), (2) Date Jun. 23, 2021,
PCT Pub. No. WO2020/170734, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 2019-030427 (JP), filed on Feb. 22, 2019.
Prior Publication US 2022/0123630 A1, Apr. 21, 2022
Int. Cl. H02K 15/02 (2006.01); H02K 1/24 (2006.01); H02K 1/30 (2006.01)
CPC H02K 15/022 (2013.01) [H02K 1/246 (2013.01); H02K 1/30 (2013.01); Y10T 29/49012 (2015.01)] 8 Claims
OG exemplary drawing
 
1. A manufacturing method for a rotary electric machine rotor that includes a rotor core and a core support member that supports the rotor core, the core support member including a tubular portion formed in a tubular shape and a support portion supported so as to be rotatable with respect to a non-rotary member to support the tubular portion from an inner side in a radial direction, the manufacturing method comprising:
inserting the core support member to the inner side in the radial direction with respect to the rotor core with the rotor core expanded such that a diameter of an inner peripheral surface of the rotor core is larger than a diameter in a general region, the core support member being formed such that the support portion is connected to a connection region which is a part of the tubular portion in an axial direction, and extends from the connection region to the inner side in the radial direction, and such that, when a portion of an outer peripheral surface of the tubular portion that overlaps the rotor core as viewed in the radial direction is defined as a fitting surface portion, a diameter of the fitting surface portion in a specific region, which includes an overlapping region which overlaps the connection region as viewed in the radial direction, is smaller than the diameter of the fitting surface portion in the general region which is a region other than the specific region; and
thereafter shrinking the rotor core relative to the tubular portion to fit the outer peripheral surface of the tubular portion and the inner peripheral surface of the rotor core with each other.