Patent ID: 6242830
Filing Date: 2001-06-05
Classification: H02K,Y10T

Abstract:
A motor comprising:a cup-like bearing housing processed from a one piece metal material including a cylindrical portion having a bearing fixing portion with an inner circumferential surface and an outer circumferential surface and a core holding portion with an inner circumferential surface and an outer circumferential surface, a bottom portion, and a hollow portion defined by said cylindrical portion and said bottom portion;a radial bearing having an inner circumferential surface and an outer circumferential surface held in said bearing fixing portion while the outer circumferential surface of said radial bearing is in contact with the inner circumferential surface of said bearing fixing portion;a gap serving as an oil reservoir between the inner circumferential surface of the core holding portion and the outer circumferential surface of said radial bearing, said gap being disposed on an opposite side of the bearing fixing portion from said bottom portion;a stator core having an inner surface and an outer surface, the inner surface of said stator core contacting the outer circumferential surface of the core holding portion;a thrust receiving plate disposed at said bottom portion of said cup-like bearing housing; anda rotary shaft rotatably supported by said radial bearing in a state that an extreme end thereof is in contact with said thrust receiving plate.