Patent ID: 6700262
Filing Date: 2004-03-02
Classification: F04D,H02K

Abstract:
A rotary electric machine comprising:a rotor rotated about a revolving shaft arranged so as to extend in an axial direction thereof; a bearing holder made of a synthetic resin material and constructed into a hollow structure; said bearing holder having a forward end positioned on one axial side defined along an axis of said revolving shaft and a rearward end positioned on the other axial side defined along the axis of said revolving shaft and opposite to said one axial side; said bearing holder being coupled at said rearward end thereof to a casing and having at least one bearing for supporting said revolving shaft fitted therein; a stator including a stator core, an insulator and a plurality of windings; said stator core being formed at a central portion thereof with a through-hole via which said bearing holder extends and including a plurality of salient poles arranged on an outer periphery thereof so as to be spaced from each other at predetermined intervals in a peripheral direction of said revolving shaft; said insulator being made of a synthetic resin material exhibiting electrical insulating properties and arranged so as to cover a part of an outer surface of said stator core white keeping a magnetic pole surface of each of said salient poles of said stator core and an inner surface of said through-hole exposed; said windings each being formed by winding a conductive wire on each of said salient poles through said insulator; and a coupling structure for coupling said bearing holder and insulator to each other to prevent relative movement between said bearing holder and said stator in the axial direction of said revolving shaft and relative movement between said stator and said bearing holder in the peripheral direction of said revolving shaft; said coupling structure being constituted by: at least one recess formed on said forward end of said bearing holder projecting through said through-hole of said stator core so as to be open on said one axial side and in a radial direction of said revolving shaft; and at least one projection provided on said insulator and tightly fitted in said recess of said bearing holder while keeping said bearing holder fully fitted in said through-hole of said stator core, wherein said at least one projection of said insulator and said recess of said bearing holder are subjected at a periphery thereof to deformation by heating, to thereby be coupled to each other while keeping said projection fitted in said recess.