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AssigneeFranz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H.
InventorsJosef Theurer, Karl Folser
Estimating the term…
A self-propelled track working machine comprises a frame, track working equipment carried by the frame and subjecting the frame to a load and an undercarriage arrangement with two main undercarriages supporting the frame for mobility on the track and an auxiliary undercarriage associated with each main undercarriage and arranged adjacent thereto. The main undercarriages include driven axles to propel the machine and each auxiliary undercarriage includes a dead axle with two wheels arranged to engage the track rails and an adjustment drive for moving the auxiliary undercarriage for selective engagement of the wheels of the dead axle with the track rails whereby diminishing or increasing portions of the load are transmitted to the track by the dead axles and wheels of the auxiliary undercarriages in dependence of the movement of the auxiliary undercarriages into the selected engagement and the load transmitted by the associated main undercarriages is correspondingly increased or diminished by operation of a control for the adjustment drives.
A heavy self-propelled track working machine comprising a frame, track working equipment carried by the frame and subjecting the frame to a load, and an undercarriage arrangement which comprises a plurality of main undercarriages supporting the frame for mobility on the track, each main undercarriage being constituted by a swivel truck having two driven axles each having two wheels engaging the track rails to propel the machine, the load being transmitted from the frame to the track by the axles and wheels of the main undercarriages, an auxiliary undercarriage associated with each main undercarriage and arranged adjacent thereto, each auxiliary undercarriage including a dead axle with two wheels arranged to engage the track rails under a selected pressure, an adjustment drive connected to each auxiliary undercarriage for moving the auxiliary undercarriage for engagement of the wheels of the dead axle with the track rails under the selected pressure whereby diminishing and increasing variations of the load are transmitted to the track by the dead axles and wheels of the auxiliary undercarriages in dependence of the movement of the auxiliary undercarriages into the selected engagement and the load transmitted by the associated main undercarriages is correspondingly increased and diminished, and a control for each adjustment drive for selective actuation thereof to effectuate the engagement of the wheels under the selected pressure.
A method of operating a heavy self-propelled track working machine comprising a frame, track working equipment carried by the frame and subjecting the frame to a load, and an undercarriage arrangement which comprises a plurality of main carriages supporting the frame for mobility on the track, each main undercarriage being constituted by a swivel truck having two driven axles each having two wheels engaging the track rails to propel the machine, the load being transmitted from the frame to the track by the axles and wheels of the main undercarriages, and an auxiliary undercarriage associated with each main carriage and arranged adjacent thereto, each auxiliary undercarriage including a dead axle with two wheels arranged to engage the track rails under a selected pressure, which method comprises the steps of propelling the machine selectively in high-speed drive and in low-speed drive, adjusting each auxiliary undercarriage for moving the auxiliary undercarriage for engagement of the wheels of the dead axle with the track rails under the selected pressure in dependence on the drive, and controlling the adjustment movement so as to effectuate the engagement in high-speed drive to transmit portions of the load to the track by the dead axles and correspondingly to decrease the load transmitted to the track by the main undercarriages while effectuating disengagement in low-speed drive and correspondingly to transmit the entire load to the track by the main undercarriages whereby traction is increased.
Dependencies are inferred from the claim text.