Siemens Aktiengesellschaft

Werner Eberlein

Klaus Recker

The invention relates to a drive device () comprising a housing (), a drive shaft () which is mounted in the housing () and which comprises a shaft axis () and a first and a second electric drive (). The drive shaft () can be rotated about the shaft axis () by means of a drive () and can be displaced in an axial manner along the shaft axis (). The drives () are aligned on the shaft axis () and comprise, respectively, a stator () and a rotor (). The stators () are secured to the housing (). The rotors () are embodied as hollow shafts and are mounted on the housing (). The rotor () of the second drive () is rotationally secured to the drive shaft () by means of a linear bearing device (), and in a manner which enables it to be axially displaced. The rotor () of the first drive () is rotationally secured to a threaded spindle () and is connected in such a manner that it cannot be axially displaced. Said drive shaft () is rotationally connected to a threaded nut () which co-operates with the threaded spindle () and in such a manner that it cannot be axially displaced. The drive shaft () comprises a recess () which is used to receive the threaded spindle ().

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Erlangen, Germany

Werner Eberlein