Assembled rotor hollow shaft with Kühlmediumverteilelement

The present invention relates to an assembled rotor hollow shaft for itself rotating about a longitudinal axis of the rotor of an electrical machine, comprising a cylindrical jacket, which surrounds a shaft cavity, and arranged on both sides of the cylinder jacket face flanges, with a respective shaft journal located at the end flanges, and wherein in a end flanges, in particular in the shaft journal, an inlet is provided through which a cooling medium into the shaft cavity, and to an inner surface of the cylinder jacket can be conducted, wherein a perpendicular to the longitudinal axis symmetrically formed and connected to the rotor Kuhlmediumverteilelement is disposed within the shaft cavity, which comprises about the inlet cooling medium entering via a receiving portion receives, via a discharge area in the direction of the inner surface of the cylinder jacket and outputs to the inner surface via a delivery area. Furthermore, the invention relates to a rotor comprising a rotor fitted with laminated cores hollow shaft according to the type mentioned above as well as an electric machine with a rotor of the above type.