Crane and crab travel gear - has drive acting centrally on wheels and situated between them

摘要

The crane and crane crab travel gear has wheels overhung on an axle. The wheels are individually driven or in pairs on the module system, the drive always acting centrally on the wheel and being situated between the wheel pairs. Where the drive is taken by a gear ring or via a built-on gearbox, the second wheel is driven by a shaft from the first one, so as to run in synchronism with it. With a gear box drive, the gearbox can be supported by a torque reaction arm, and driven by a flange-mounted or separate motor.