Bearing centering structure for rotary electric apparatus

Claim 1

Rotary electric apparatus comprising a stator core consisting of a plurality of stator plates having slots to accomodate stator windings, said stator windings extending beyond the axial end faces of the stator plates at opposite ends of the stator core, the stator core defining a rotor chamber, a rotor mounted on a shaft for rotary motion relative to the stator, bearing means mounted on said shaft, bearing support means connecting said stator unit to said bearing means and molded guide member made of an electrically non-conducting material secured to the stator unit at opposite axial end faces thereof, each of said guide members sealing the end openings of the stator slots and in bonding engagement with the windings and each defining a seat for the bearing support member, each of said guide members being of an L-shaped cross section to provide an annular centering surface concentric with the rotor axis and truly radial abutment surfaces parallel to each other and disposed in planes perpendicular to the rotor axis and spaced apart an axial distance slightly greater than the overall length of the stator core, the vertical leg of said guide member terminating in an edge of a diameter coincident and aligned with the outer periphery of the rotor cavity.