Patent ID: 6836954
Filing Date: 2005-01-04
Classification: H02K,Y10T

Abstract:
1. Rotor for an electronically commutated motor that comprises: a sub-assembly formed by a core of magnetic laminations and by a plurality of segments of a cylinder made of preferably sintered magnetizable materials positioned on the outer surface of the core, a substantially cylindrical wrapper, made of a non-magnetic material preferably an austenitic steel, surrounding said segments of a cylinder, and having an inside diameter that is not smaller than the outside diameter of the said sub-assembly, at least a pair of plane elements, in the form of rings made of a non-magnetic material, preferably aluminum, which are joined to the end portions of said wrapper at the extremities of the core by first elastic means having a length that is not smaller that the length of the core, and are supported by means that are integrally provided in the core parallel to the axis of rotation of the rotor, which are adapted to interfere with contiguous longitudinal edges of said segments of a cylinder so as to keep said segments circumferentially spaced from each other, characterized in that it also comprises second elastic means which are supported by means that are integrally provided in the said core, adapted to ensure that the outer surface of the said segments keeps in contact with the inner surface of the wrapper and are the sole means: provided in the rotor to make up for the longitudinal and radial plays of the various parts.