Patent ID: 7980151

Claim:
A door drive for garage, garden, hall or factory doors, comprising a motor unit ( 2 ) which comprises a drive motor ( 3 ), a motor output shaft ( 4 ), a drive motor housing, an output transmission ( 8 ), which on the input end can be connected with the motor output shaft ( 4 ) and on the output end includes a transmission output shaft for driving a door shaft, a release clutch ( 20 ) for releasing the motor output shaft ( 4 ) with respect to the door moving element, and at least one damping element ( 30 ) for damping drive shocks, wherein the output transmission ( 8 ) includes a transmission housing ( 11 ) formed separate from the motor unit ( 2 ) and together with the release clutch ( 20 ) and the damping element ( 30 ) forms a separate, modular drive attachment, which is connected to the drive motor housing and the transmission housing, wherein the drive motor housing and the transmission housing are formed separate from each other, which receive function blocks of the motor unit ( 2 ) and drive attachment ( 7 ), wherein two separate gear stages are provided, one of which is integrated in the motor unit ( 2 ) and the other one integrated in the drive attachment ( 7 ), both gear stages ( 5 , 13 , 14 ) preferably being formed different from each other, and wherein the transmission housing ( 11 ) of the drive attachment ( 7 ) includes two shells ( 15 , 16 ) which can be placed on top of each other, one of which includes connecting means ( 9 ) for connecting the motor unit ( 2 ) and the other one includes connecting means ( 10 ) for supporting the driving force.