| 摘要 |
A ballast cleaning machine comprises a machine frame comprising two frame parts, one of the ends of one machine frame part adjoining one of the ends of the other machine frame part while the machine frame part ends opposite to the one ends are remote from each other, and the adjoining machine frame part ends being pivotally linked to each other for pivoting about a vertical axis. Respective undercarriages support the machine frame on the track, two of the undercarriages being arranged at the remote machine part ends and a third one of the undercarriages being arranged on one of the machine frame parts in the range of the vertical pivoting axis. An endless ballast excavating chain is arranged on a first machine frame part, the chain including a transverse section extending for operation under the track, a ballast screening arrangement is arranged to receive excavated ballast from the chain, and a track lifting device is arranged on the first machine frame part adjacent the transverse ballast excavating chain section. A drive connects the third undercarriage to the one machine frame part whereon it is arranged for longitudinally displacing the third undercarriage whereby the spacing between the third undercarriage and the track lifting device may be varied. |
