Patent ID: 6570283
Filing Date: 2003-05-27
Classification: H02K

Abstract:
A rotary electric machine, comprising:a frame having a concave bearing box having a smooth inner periphery at a rear center thereof; a stator fixed to said frame; a rotor disposed inside said frame and rotatably supported by said frame; a bearing fitted to said inner periphery of said bearing box to support a rear portion of a rotor shaft; a bearing cover, fitted to said inner periphery of said bearing box at the rear of said bearing, for covering a rear portion of said bearing, wherein said bearing cover comprises a cup-shaped unitary member made of rubber having a hollow cylindrical portion, a plurality of elastically contracted ring-shaped projections with stratified elastic edges on the periphery thereof in close contact with the inner periphery of said bearing box and a bottom for sealing said hollow cylindrical portion, and wherein said plurality of ring-shaped projections has spaces between said stratified elastic edges.