Power transmission system for a passenger conveyor

A power transmission system in a platform drive mechanism of a passenger conveyor which includes a conveyor frame and a plurality of laterally extending passenger platforms movably supported for driven movement about an endless path on the frame and engaged with circuitous drive chains on opposite sides of the conveyor frame, the power transmission system comprising:

• a pair of motors mounted at opposite sides of the conveyor frame;
• a sprocket assembly operatively associated with the drive chains and including a laterally extending drive shaft, the drive shaft mounting a pair of axially spaced sprockets which are engaged one with each of the drive chains;
• a first transmission disposed outboard one side of the passenger platforms and having an output shaft engaged with the drive shaft and journaled on the conveyor frame, the first transmission including a gear reduction drive coupled directly between one of the pair of motors and the output shaft;
• and
• a second transmission disposed outboard another side of the passenger platforms and having an output shaft engaged with the drive shaft and journaled on the conveyor frame, the second transmission including a gear reduction drive coupled directly between the other of the pair of motors and the output shaft.

In a platform drive mechanism for a passenger conveyor which includes a conveyor frame and a plurality of laterally extending passenger platforms movably supported for driven movement about an endless path on the frame and engaged with circuitous drive chains on opposite sides of the conveyor frame, a power transmission system comprising:

• motor means mounted on the conveyor frame for driving the passenger platforms;
• a sprocket assembly operatively associated with the drive chains and including a laterally extending drive shaft, the drive shaft mounting a pair of axially spaced sprockets which are engaged respectively with the drive chains;
• transmission means drivingly connecting the motor means and the sprocket assembly and disposed outboard of the passenger platforms, the transmission means including a plurality of intermeshed gears, one of the gears defining an input stage coupled with the motor means and another of the gears defining an output stage coupled with the drive shaft;
• and
• a torque reaction arm interconnected between the transmission means and the conveyor frame for opposing a rotational tendency of the transmission when power is transferred to the sprocket assembly.