| 摘要 |
A ballast tamping machine comprising a machine frame movable along, and extending in the direction of, the track and having guides extending transversely to the machine frame and track, and a tamping tool unit comprising a frame associated with one of the rails and mounted for transverse displacement on the guides, the frame having two pairs of vertical guide columns, a power drive for transversely displacing the frame on the guides, a respective tamping tool carrier mounted on each pair of vertical guide columns for vertical adjustment with respect to the frame, a respective drive for vertically adjusting each one of the tamping tool carriers independently on the pair of vertical guide columns whereon the respective tamping tool carrier is mounted, a respective pair of tamping tools mounted on each one of the tamping tool carriers for immersion at the field side and the gage side, respectively, of the associated rail at a respective point of intersection between the rail and a track tie, a hydraulic drive for independently reciprocating each one of the tamping tools of each one of the pairs of tamping tools, and a respective drive for vibrating the tamping tools of each pair of tamping tools.
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