Reverse machine (open pit)
A reverse machine or a track pusher is a device for moving track sections or conveyor belts in open-cast mining .
On the one hand, there are rail-bound rear-end machines that move sideways the tracks on which they are traveling. On the other hand, there are tracked vehicles that move the rails with a device on the side. For this purpose, tanks were partly converted (e.g. T-55T ).
Diesel reverse machine
A diesel engine generates electricity for the traction motors and ancillary units by means of a generator . The special thing about this type of rail vehicle is the roller chair attached to the center of the vehicle. A so-called lifting column, which moves another column upwards in a spiral like a spindle, enables the entire roller chair to be moved up or down.
For the swiveling of the roller chair, another spindle is attached to the lifting column, which spirally pulls the lifting column either towards itself or away through a gear. The actual roller chair has lifting and pressure rollers. There are 16 pressure rollers on each roller chair to guide the rail. A total of eight lifting rollers are installed for the actual lifting and swiveling of the tracks. These have a bandage at the bottom, in which the rail runs and is pressed against the bandage by the pressure rollers.
Another special feature of the rear machines are the crawler tracks at the ends of the rear machine. As with the roller chair, the crawler tracks can be raised or lowered using a lifting column. This means that rear-end machines can travel at any time on so-called drop-out points between the tracks or, in order to let the bridge structure pass, even on drop-out mats.
Back of the track (approx. 1930-1940)
Heavy Soviet chain tractor DET-250 as a rear machine of a conveyor system
Detailed view of the sander of an identical machine in Ferropolis
Diesel reverse machine
Diesel reversing machine: caterpillar track for moving the machine to another track
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