| 摘要 |
A mobile ballast cleaning machine comprises a machine frame, undercarriages supporting the machine frame for mobility on the track, an excavating chain mounted an the machine frame and arranged to excavate the ballast to expose the subgrade, a ballast screening installation arranged to receive the excavated ballast from the excavating chain and to clean the received ballast, a ballast conveyor unit extending in the longitudinal direction and having an input end receiving the cleaned ballast from the ballast screening installation and a discharge end, a chute arranged at the excavating chain for receiving the cleaned ballast from the discharge end of the ballast conveyor unit, the chute having at least one outlet opening, a conveyor band associated with each outlet opening for receiving the cleaned ballast from the outlet opening and having a discharge end for discharging the cleaned ballast on the exposed subgrade, a variable speed drive for operating each conveyor band to impart thereto a desired conveying speed, and a power-actuated, vertically and transversely adjustable track lifting device mounted on the machine frame.
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