Patent ID: 7723885

Claim:
A hybrid drive unit for installation between an internal combustion engine and a transmission of a motor vehicle the hybrid drive unit comprising: an electric machine operable as a motor or a generator and having at least a rotor, a stator and permanent magnets, wherein the electric machine is configured to form a non-rotary connection between the rotor and a crankshaft of the internal combustion engine in a connected state, the rotor having a bearing on a transmission side and being supported on an internal combustion engine side using at least one crankshaft bearing of the internal combustion engine; and a radial safety mechanism configured to prevent contact between metal and/or magnetic components of the rotor and the stator in a disconnected state in which the rotor and the crankshaft are not connected to each other, wherein the rotor is freely rotatable in the connected state, and wherein the rotor and stator are separated from each other by a radial distance and wherein the radial safety mechanism defines an air gap between the safety mechanism and a component disposed radially adjacent to the safety mechanism, the air gap being narrower than the radial distance.