US 12,445,003 B2
Rotor for a rotary electric machine
Davide Ferrara, Modena (IT); Paolo Faverzani, Modena (IT); and Luca Poggio, Modena (IT)
Assigned to FERRARI S.P.A., Modena (IT)
Filed by FERRARI S.P.A., Modena (IT)
Filed on May 25, 2023, as Appl. No. 18/323,454.
Claims priority of application No. 102022000011189 (IT), filed on May 27, 2022.
Prior Publication US 2023/0387738 A1, Nov. 30, 2023
Int. Cl. H02K 1/276 (2022.01); H02K 5/15 (2006.01); H02K 7/00 (2006.01)
CPC H02K 1/2766 (2013.01) [H02K 5/15 (2013.01); H02K 7/003 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A rotor (4) for a rotary electric machine (1) and comprising:
a support cylinder (8), which has an outer surface (9) and a central cavity (12);
a plurality of main permanent magnets (6), which rest on the outer surface (9) of the support cylinder (8) and are arranged beside one another around a rotation axis (3) to form a closed ring;
two side discs (15), which are fixed at the axially opposite ends of the support cylinder (8) and are each partially arranged inside the central cavity (12) of the support cylinder (8); and
two half-shafts (10, 11), which are independent of and separate from one another;
wherein the two half-shafts (10, 11) are independent of and separate from the respective side discs (15) and are singularly inserted in opposite ends of the central cavity (12) of the support cylinder (8), independently of the respective side discs (15), to form one single block with the support cylinder (8); and
wherein each side disc (15) has, at the centre, a through hole, through which a corresponding half-shaft (10, 11) is arranged with a clearance, namely without mutual contact.