US 12,395,020 B2
Electric motor, cleaner having same and electric motor manufacturing method
Kwangyong Jang, Seoul (KR); Yongdae Kim, Seoul (KR); and Jin Hong, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 17/926,836
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Jan. 27, 2021, PCT No. PCT/KR2021/001055
§ 371(c)(1), (2) Date Nov. 21, 2022,
PCT Pub. No. WO2021/235647, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 10-2020-0061167 (KR), filed on May 21, 2020.
Prior Publication US 2023/0208214 A1, Jun. 29, 2023
Int. Cl. H02K 1/14 (2006.01); H02K 7/14 (2006.01); H02K 15/022 (2025.01); H02K 15/10 (2006.01)
CPC H02K 1/148 (2013.01) [H02K 7/145 (2013.01); H02K 15/022 (2013.01); H02K 15/10 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electric motor comprising:
a stator, the stator comprising a stator core and a stator coil wound around the stator core; and
a rotor configured to rotate relative to the stator,
wherein the stator core comprises:
a plurality of yokes that are split in a circumferential direction of the stator core, each of the plurality of yokes comprising a protruding portion,
a plurality of assembly connectors that connect the plurality of yokes to one another, each of the plurality of assembly connectors comprising a protrusion accommodating portion that accommodates the protruding portion and couples two adjacent yokes among the plurality of yokes to each other along the circumferential direction, and
a plurality of teeth, each tooth protruding from an inner surface of one of the plurality of assembly connectors in a radial direction of the stator core,
wherein an outer surface defined by the plurality of assembly connectors protrudes radially outward relative to an outer surface defined by the plurality of yokes,
wherein each of the plurality of teeth comprises a tooth protruding portion,
wherein each of the plurality of assembly connectors further comprises a tooth protrusion accommodating portion that accommodates the tooth protruding portion, the tooth protrusion accommodating portion being an opening defined at the inner surface of each of the plurality of assembly connectors,
wherein a circumferential width of each of the plurality of assembly connectors is greater than a circumferential width of each of the plurality of teeth in the circumferential direction,
wherein each of the plurality of teeth comprises extension portions that are in contact with the inner surfaces of one of the plurality of assembly connectors, the extension portions extending from sides of an outer end portion of one of the plurality of teeth in the circumferential direction and being in contact with the inner surfaces of the one of the plurality of assembly connectors, and
wherein a maximum width of the extension portions corresponds to the circumferential width of each of the plurality of assembly connectors.