| 摘要 |
A mobile track tamping machine comprises a machine frame, undercarriages mounting the machine frame on a track, and a plurality of independently transversely and vertically adjustable tamping tool units aligned transversely to the track, each tamping tool unit comprising a pair of reciprocable vibratory tamping tools including tamping picks immersible in the ballast, drives for reciprocating the tamping tools in a direction extending substantially perpendicularly to the ties and for vibrating the tamping tools, and a drive for vertically adjusting the tamping tool unit. Respective transversely pivotal carrier frames for two of these tamping tool units are mounted on the machine frame, each carrier frame being pivotal about a vertical axis in a plane extending substantially parallel to the track, and an independent drive is connected to each carrier frame for pivoting the carrier frame.
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