Patent ID: 7841250

Claim:
A drive device, comprising: a housing; a drive shaft supported in the housing and defining a shaft axis; first and second electric drives for rotating the drive shaft about the shaft axis and moving the drive shaft axially along the shaft axis, wherein the first and second electric drives are disposed in aligned relationship to the shaft axis and include each a stator fixed to the housing and a rotor constructed as hollow shaft and supported on the housing; a linear bearing device for supporting the rotor of one of the first and second electric drives in fixed rotative engagement to the drive shaft while allowing a movement of the rotor axially in relation to the drive shaft, a threaded spindle fixedly connected to the rotor of the other one of the first and second electric drives so that the rotor of the other one of the first and second electric drives is in fixed rotative and axially immovable engagement with the threaded spindle; and a threaded nut fixedly connected to the drive shaft so that the drive shaft is in fixed rotative and axially immovable engagement with the threaded nut, wherein the drive shaft has a recess to accommodate the threaded spindle, wherein the housing has an annular element which extends in an axial direction between the rotors of the first and second electric drives and supports the stators of the first and second electric drives.