| 摘要 |
The invented assembly (1) for tamping sleepers (2) of a track (3) comprises tamping tools (6) that are moved in pairs through the mediation of a feed drives (5) towards each other and that are mounted in swingable manner about a feed axis (11) on a tool carrier (12) being adjustable for height. The assembly includes at least one tamping pick (8) arranged at the lower end of the tamping tool (6) and intended for immersion in the ballast upon vertical adjustment of the tamping tool carrier (12), the tamping pick (8) being mounted on the tamping tool (6) for pivoting about a pivot axis (11) extending perpendicularly to the swivel axis (10). A pivot drive (16) designed as a hydraulic cylinder is connected to the tamping pick (8) for pivoting the same in the direction of elongation of the sleepers, and an auxiliary drive (21) is connected to the pivot drive (16). The pivot drive (16) and the auxiliary drive (21) each being linked to a respective one of two hinging points (27) associated with the tamping tool (6) and the tamping pick (8), respectively. A squeezing drive is provided for reciprocating the tamping tools in the longitudinal direction.
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