Drive for sheet-fed rotary printing presses with at least two tandem-mounted printing units

Claim 1

Drive for sheet-fed rotary printing machines with at least two tandem-mounted printing units driven by a closed gear train and including a drive motor comprising a drive train driven by the motor and extending parallel to the closed gear train, the closed gear train having at least two force input locations at which the closed gear train is connected to said drive train, said drive train comprising a first displaceably mounted transmission unit connected to the closed gear train at one of said force input locations, a second transmission unit corresponding to said first unit connected to the closed gear train at the other of said force input locations, and transmission means connecting said first transmission unit to said second transmission unit, said drive train being constructed as a bipartite main drive shaft, both parts of said main drive shaft being coupled to one another so as to be displaceable relative to one another in axial direction, said transmission units including a worm respectively secured to each part of said main drive shaft and a worm gear respectively meshing with each of said worms at a respective force input location, each of said main drive shaft parts being mounted in respective bearings so as to be axially displaceable.