Rotor shaft and electrical machine

Abstract

A rotor shaft for a rotor of an electric machine may include a hollow shaft, an extension element, a first bearing device, and a second bearing device. The hollow shaft may extend along an axial direction from a first axial end section to a second axial end section. The extension element may be adapted separately from the hollow shaft and may be connected to the first end section of the hollow shaft via a first bearing device such that the extension element is rotatable in relation to the hollow shaft. The extension element may extend beyond the first end section as an axial extension of the hollow shaft. The second bearing device may be arranged on an outside of the second end section of the hollow shaft and may be connected to the hollow shaft to form at least one of a rotatable connection and a rotationally fixed connection.

Dependencies are inferred from the claim text.