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公开(公告)号：US11984788B2
公开(公告)日：2024-05-14
申请号：US17497344
申请日：2021-10-08
Applicant: LG Electronics Inc.
Inventor： Sunghoon Kwak , Hyuk Nam , Sanghoon Park , Seoyoung Jeong , Namgi Kim , Minsoo La
IPC: H02K5/16 , H02K1/2786 , H02K5/173 , H02K7/00
CPC classification number: H02K5/1732 , H02K1/2786 , H02K7/003
Abstract: An electric motor includes a stator, a rotor having a rotating shaft, first and second bearings each having an outer ring, balls, and an inner ring, and spaced apart axially from each other, a preload washer including a shaft section having a preset fixed length in the axial direction, and an elastically-deformable portion extending from one end portion of the shaft section to be elastically deformable, the preload washer applying a preset intensity of preload to the inner ring of the first or second bearing, and a coupling member screwed into an end portion of the rotating shaft and elastically deforming the preload washer in the axial direction. This structure may result in preventing an excessive preload from being applied to the bearing and allowing a preset preload to be stably maintained when thrust is applied.
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公开(公告)号：US11605997B2
公开(公告)日：2023-03-14
申请号：US17142920
申请日：2021-01-06
Applicant: LG Electronics Inc.
Inventor： Jaeho Kim , Sunghyun Kim , Kyungho Ha , Sunghoon Kwak
Abstract: An electric motor assembly for, for example, a hair dryer, includes an impeller, an outer housing in which the impeller is accommodated, an inner housing concentrically disposed in the outer housing, a stator having one side thereof accommodated in the inner housing, a rotor provided with a rotating shaft having one end coupled to the impeller and rotatably accommodated in the stator, a first bearing disposed at one side of the rotor, a second bearing disposed at another side of the rotor, and a bracket coupled to the stator and the outer housing so as to support the second bearing. Accordingly, initial alignment of the stator and the rotor may be securely maintained.
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