US 11,799,367 B2
Rotor manufacturing method
Shinya Sano, Toyota (JP); and Kensuke Komori, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Aug. 4, 2021, as Appl. No. 17/444,476.
Claims priority of application No. 2020-156315 (JP), filed on Sep. 17, 2020.
Prior Publication US 2022/0085702 A1, Mar. 17, 2022
Int. Cl. H02K 15/03 (2006.01)
CPC H02K 15/03 (2013.01) [H02K 2215/00 (2021.08); Y10T 29/49012 (2015.01)] 13 Claims
OG exemplary drawing
 
1. A rotor manufacturing method that allows magnetized magnets inserted in second magnet holes of a second rotor core to be inserted, while retaining magnetism, into first magnet holes of a first rotor core in which magnetized magnets are not inserted, the method comprising:
a placing step of placing the second rotor core on a first end surface, in a stack thickness direction, of the first rotor core such that the second magnet holes overlap the first magnet holes; and
an extruding step of extruding the magnetized magnets from the second magnet holes toward the first magnet holes using a non-magnetic jig, wherein
the non-magnetic jig has non-magnetic guide rails,
before the extruding step is performed, the magnetized magnet in each of the second magnet holes is attracted to a second wall of the second magnet hole and in contact with the second wall, and
the extruding step includes
inserting and installing the non-magnetic guide rails between the second wall and the magnetized magnet in contact with the second wall so as to keep the second wall and the magnetized magnet in the second magnet hole from coming into contact with each other, and
extruding the magnetized magnet that is no longer in contact with the second wall toward the first magnet hole along the non-magnetic guide rails.