Patent ID: 6124657
Filing Date: 2000-09-26
Classification: F16C,H02K

Abstract:
A motor comprising:a frame;a housing disposed in said frame;a stator secured to an outer wall of said housing;a sleeve situated in said housing, and an inner wall thereof extending straight in an axial direction of said sleeve;a rotary shaft extending through said sleeve and being rotatably supported by said sleeve;a rotor having a magnet opposite to said stator; andno more than two recessed portions on said shaft forming oil reservoirs and having oil provided therein, said two recessed portion comprising an annular recess formed on a central part of said shaft an facing said inner wall of said sleeve and a tapered section formed on an end of said rotary shaft facing a bottom face of said housing; andwherein a first of said oil reservoirs is formed by said end of said tapered section, said bottom face of said housing and said sleeve, and a second of said oil reservoirs is formed between said annular recess and said inner wall of said sleeve.