| 摘要 |
A device comprising two pivoting tamping tools of lever form (9) which are mounted in opposition on a vertically movable housing (1). Each tool (9) has a bearing (15) force-fitting on an eccentric surface of a rotary shaft (17) on which a regulating flywheel (19) having a peripheral toothing is fixed within the housing (1). The two flywheels (19) engage with each other via their toothing and one of them also meshes with a pinion (22) which is driven by a motor (21). The pivoting of the two tools (9) is controlled, in phase opposition, by two cylinder-piston units (12). A lubricating circuit, driven as a result of the stirring of a bath of oil by the flywheels (19) and of centrifuging by an imbalance weight, is established through the bearings of the rotary shaft (17).
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