Abstract: A rotor for an electric machine is formed of a rotor shaft and a rotor body which is non-rotatably mounted on the rotor shaft. At least sections of the rotor shaft are configured as a hollow shaft. A delivery screw is non-rotatably mounted in the hollow shaft for conveying a cooling fluid in a first direction through the hollow shaft. In order to provide an improved cooling of the rotor, the rotor body is formed with at least one cooling channel which extends in the axial direction. The cooling channel has an end-face inlet opening and an end-face outlet opening positioned on the opposite side for the cooling fluid. The cooling fluid conveyed in the first direction through the hollow shaft can be at least partially directed through the inlet opening into the cooling channel and conveyed in a second direction, which is counter to the first direction, to the outlet opening.

Abstract: A rotor for an electric machine is formed of a rotor shaft and a rotor body which is non-rotatably mounted on the rotor shaft. At least sections of the rotor shaft are configured as a hollow shaft. A delivery screw is non-rotatably mounted in the hollow shaft for conveying a cooling fluid in a first direction through the hollow shaft. In order to provide an improved cooling of the rotor, the rotor body is formed with at least one cooling channel which extends in the axial direction. The cooling channel has an end-face inlet opening and an end-face outlet opening positioned on the opposite side for the cooling fluid. The cooling fluid conveyed in the first direction through the hollow shaft can be at least partially directed through the inlet opening into the cooling channel and conveyed in a second direction, which is counter to the first direction, to the outlet opening.