Rotor with non-through shaft, assembly of rotors, rotor with multiple magnetic masses and associated rotary electrical machine

A rotor with a non-through shaft for an electrical machine, the rotor comprising:

• two half-shafts;
• and
• a cylindrical magnetic mass gripped between, and directly connected to, the two half-shafts, each half-shaft being formed in a single piece and comprising a mounting flange connected to the cylindrical magnetic mass at one end;
• wherein each half-shaft of the two half-shafts comprises a coupling flange integrally combined therewith at an outer side thereof;
• wherein the half-shaft is located opposite each mounting flange;
• wherein the coupling flange comprises through holes distributed in staggered rows over at least two different diameters of the coupling flange to accommodate fastening components so as to transmit a torque;
• wherein (i) a first diameter of the at least two different diameters of the coupling flange contains a first row of through holes and is smaller than or equal to 0.9 times an outer diameter of the coupling flange and (ii) a second diameter of the at least two different diameters of the coupling flange contains a second row of through holes and is smaller than or equal to 0.8 times the outer diameter of the coupling flange;
• wherein a double torque transmission occurs at each side of the rotor;
• and
• wherein the through holes are alternately smooth and tapped such that a smooth hole of the coupling flange is coaxial to a tapped hole of another coupling flange and a tapped hole of the coupling flange is coaxial with a smooth hole of the other coupling flange, and the fastening components each pass through the smooth hole and are engaged in a tapped hole of corresponding coupling flanges, and each fastening component includes a first side which is arranged alternatively in adjacent through holes along opposite sides of the coupling flange, wherein an angular distance between the adjacent through increases the torque transmitted.