US 12,316,166 B2
Rotor, method of producing the rotor, and motor
Keisuke Takizawa, Nagano (JP); Hisao Hirabayashi, Nagano (JP); and Masakazu Ikeda, Nagano (JP)
Assigned to SHINANO KENSHI KABUSHIKI KAISHA, Nagano (JP)
Appl. No. 17/802,813
Filed by SHINANO KENSHI KABUSHIKI KAISHA, Nagano (JP)
PCT Filed Jan. 22, 2021, PCT No. PCT/JP2021/002133
§ 371(c)(1), (2) Date Aug. 26, 2022,
PCT Pub. No. WO2021/205706, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2020-069094 (JP), filed on Apr. 7, 2020.
Prior Publication US 2023/0137688 A1, May 4, 2023
Int. Cl. H02K 1/2791 (2022.01); H02K 1/278 (2022.01); H02K 1/28 (2006.01); H02K 15/03 (2025.01)
CPC H02K 1/2791 (2022.01) [H02K 1/278 (2013.01); H02K 1/28 (2013.01); H02K 15/03 (2013.01); H02K 2215/00 (2021.08)] 9 Claims
OG exemplary drawing
 
1. A rotor comprising a plurality of flat plate magnets divided in a circumferential direction at a predetermined interval at a circumferential surface of a rotor yoke while using a plurality of adhesives having different curing conditions, each of the flat plate magnets being a rare earth magnet with a rust-proofed surface, wherein
a first bonding part coated with a first adhesive curing in a predetermined time while using at least one of an ultraviolet-curing or anaerobic-curing adhesive and a quick-setting adhesive and a second bonding part coated with a thermosetting second adhesive taking a longer curing time than the first adhesive but having a higher bonding strength are formed next to each other at a bonding surface of the flat plate magnet, and an adhesive layer is formed by using a void formed between a curved surface of the rotor yoke and a flat surface of the flat plate magnet as an adhesive reservoir of the first adhesive and the second adhesive, and
the plurality of flat plate magnets are partially bonded, at a predetermined interval, at the first bonding part including the adhesive reservoir by the curing of the first adhesive, via a positioning member for positioning in a radial direction and in an axial direction at the circumferential surface of the rotor yoke, and the second adhesive is thermally cured in a state in which the positioning member is removed, thus bonding and fixing the plurality of flat plate magnets via a predetermined gap between the plurality of flat plate magnets in the circumferential direction at the second bonding part including the adhesive reservoir, and assembling the plurality of flat plate magnets to the rotor yoke at a predetermined interval.