Squirrel-cage rotor for an asynchronous machine

An asynchronous machine comprising:

• a stator;
• a first stator end winding;
• a second stator end winding;
• and
• a squirrel-cage rotor comprising:
• a first shaft journal comprising a first shaft journal bearing surface;
• a second shaft journal comprising a second shaft journal bearing surface;
• a laminated rotor core;
• and
• a filler body cast onto the laminated rotor core connecting the filler body and the laminated rotor core in a rotationally fixed manner;
• wherein the filler body is connected to the shaft journals in a rotationally fixed manner and a torque applied to the shaft journals is transmitted to the laminated rotor core;
• wherein the first stator end winding surrounds a first short-circuiting ring;
• and
• the second stator end winding surrounds a second short-circuiting ring;
• and
• rotation of the shaft journals drive a cooling medium out of radial bores radially to the outside in the direction of the stator end windings and can cool the stator end windings;
• wherein the filler body comprises three spokes extending in a radial direction;
• each of the three spokes includes two respective threaded bores at opposing ends;
• and
• the first shaft journal bearing surface is attached to the laminated rotor core by three screws fastened into the threaded bores of the three spokes at a first end of the laminated rotor core and the second shaft journal bearing surface is attached to the laminated rotor core by three screws fastened into the threaded bores of the three spokes at a second end of the laminated rotor core.