Patent ID: 8381389
Filing Date: 2013-02-26
Classification: H02K,Y10T

Abstract:
1. A method for assembling a rotor of an electric machine including the rotor rigidly attached with a shaft having a longitudinal axis and made by a plurality of identical permanent magnets forming a rotor ring, each of said permanent magnets being a parallelepiped body, the method comprising the following operative steps: providing a first annular flange; forming a plurality of fixed linear guides onto a side of said first annular flange, said guides being angularly regularly spaced and orthogonal to the flange on which said guides are formed; inserting the permanent magnets in said guides and sliding the magnets towards said first flange; positioning of a second annular flange on said guides; locking of said second annular flange to said guides, so that said magnets are clamped, inside said guides, by the first annular flange and the second annular flange, wherein said guides are formed by: inserting a rod through each of a plurality of passing holes provided in said first annular flange and locking the rods orthogonally to said first annular flange; fitting, on each of said rods, a body having a central portion comprising a passing hole and two side arms on opposite sides with respect to the central part, said arms being orthogonal to said central part of the body, said body being positioned with said central portion bearing on the first annular flange and with said arms turned upwardly; fitting a tubular spacer on each of said rods; fitting, on each of said rods, a further body with a central portion having a further passing hole and two further side orthogonal arms, said two further side orthogonal arms being turned downwardly, toward said first flange.