| 摘要 |
A machine (1) consists of a machine frame (5), supported on on-track undercarriages, on which a sleeper crib excavator (11) is arranged. The latt er serves for removing ballast situated in a sleeper crib (2) of a track (3). T he sleeper crib excavator (11) is formed as an endless clearing chain (12) designed to be set in rotation by means of a drive. In order to lower a ballast take-up segment (15) located in the lowermost end region into the sleeper crib (2) situated between rails (16) of the track (3), the clearing chain (1 2) is mounted for vertical adjustment on the machine frame (5) and connected to a displacement drive.
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