Patent ID: 8994245
Filing Date: 2015-03-31
Classification: H02K

Abstract:
1. A permanent magnet type electrical rotating machine comprising: a stator; a rotor; and a casing in which the stator and the rotor are installed, wherein the rotor is supported in an overhung rotor support structure in which a rotor shaft is supported at only one end side thereof by a bearing provided on one side of the casing, wherein another end side of the rotor shaft to be a bearing support-free side is capable of coupling to an end of a shaft of a prime mover, wherein the rotor shaft is configured such that, upon a state of not being coupled to the prime mover shaft, the bearing support-free side is joined to an end face of the casing through a retaining member to be prevented from moving in any of an axial, radial and circumferential directions of the rotor shaft, wherein there is provided a plurality of the retaining members, wherein each of the retaining members comprises a pair of L-shaped metal parts joined with each other by a screw member while face-to-face sides of the L-shaped metal parts are butt-joined with the screw member, wherein each pair of the L-shaped metal parts is joined to the bearing support-free side of the rotor shaft and the end face of the casing with screw members, and wherein the face-to-face sides of the pair of L-shaped metal parts are provided with respective through-holes for screw member, and the through-hole in either of the pair of the L-shaped metal parts is provided with play to allow the pair of the L-shaped metal parts to be shifted relative to each other in the axial direction of the rotor so as to absorb axial misalignment between L-shaped metal part joined at the rotor shaft and the casing end face.