A power transmitting gear device (100) is provided with an internally toothed gear (42), a carrier (2), an externally toothed gear (12), and torque pins (22).
The externally toothed gear (12) is supported by the carrier (2) so as to be rotatable eccentrically and rotates eccentrically while meshing with the internally toothed gear (42).
Through-holes (24) are formed in the externally toothed gear (12).
The carrier (2) is supported so as to be coaxial with the internally toothed gear (42).
At least two pins are embodied on the lock which is mounted in such a way that said pins are disposed in the slots of the worm and the gear wheel.
Each of the screwdrivers are separately drivable by a common motor (1) via a driving wheel transmission comprising a primary driving wheel (5) for each screwdriver.