US 11,942,838 B2
Rotor assembling method
Kenta Takeshima, Okazaki (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Jul. 26, 2021, as Appl. No. 17/443,375.
Claims priority of application No. 2020-126886 (JP), filed on Jul. 27, 2020.
Prior Publication US 2022/0029510 A1, Jan. 27, 2022
Int. Cl. H02K 15/03 (2006.01); H02K 1/276 (2022.01); H02K 1/28 (2006.01)
CPC H02K 15/03 (2013.01) [H02K 1/276 (2013.01); H02K 1/28 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of assembling a rotor including a cylindrical rotor core and a permanent magnet that is held in a hole portion as slot of the cylindrical rotor core such that a longitudinal direction of the permanent magnet is parallel to an axis of the cylindrical rotor core,
the method comprising in an order sequential steps of:
a first moving step of moving at least one of the permanent magnet and the cylindrical rotor core so as to change a position of the permanent magnet relative to the cylindrical rotor core, such that a longitudinal end portion of the permanent magnet is positioned to be opposed to an opening of the hole portion;
a load measuring step of moving one of the permanent magnet and the cylindrical rotor core toward the other of the permanent magnet and the cylindrical rotor core in an approaching direction that is parallel to the axis, and measuring a load applied to at least one of the permanent magnet and the cylindrical rotor core, by a load sensor, when the longitudinal end portion of the permanent magnet is brought into contact with the cylindrical rotor core;
a second moving step of moving at least one of the permanent magnet and the cylindrical rotor core so as to change the position of the permanent magnet relative to the cylindrical rotor core, depending on data relating to the load measured at the load measuring step, such that a positional deviation between the permanent magnet and the hole portion, as seen in a direction parallel to the axis, is reduced; and
an inserting step of inserting the permanent magnet into the hole portion, by moving the one of the permanent magnet and the cylindrical rotor core relative to the other of the permanent magnet and the cylindrical rotor core in a direction same as the approaching direction.