| 摘要 |
Drive device for a door or such like fastening device with a motor drive, the motor shaft of which is coupled to an actuating shaft causing the movement of the door leaf, and with a hand-operated replacement drive, the output side of which can be connected to the motor shaft via a coupling device. This drive device is designed, with a view to a reliable operating mode and simple production and handling, in such a way that the coupling device is formed by at least three gearwheels, at least one of which is rotatably mounted as an intermediate gear in the manner of a planet wheel on a carrier pivotable freely about the axis of a gearwheel designed as a driving member and engages with transmission on the driving gearwheel in each pivoting position of the carrier, the intermediate gearwheel being provided with a rotation prevention and engaging on a gearwheel forming the output member of the coupling device when the carrier has run through an initial angle of rotation larger than 90@ between the position of rest and the coupling position. |
