Self-propelled machine for stabilizing, by hammering and compacting, tracks laid on ballast

摘要

The machine is constituted by a self-propelled truck which comprises a first hammering unit and a second compacting unit. The first unit comprises mutually opposite sets of inclined vibrating hydraulic tools which can be arranged so as to straddle each tie and are adapted to limit the migration of crushed rock from the tamping regions of the ballast, which lie below each tie, to the intermediate ballast regions which lie between two consecutive ties. The second unit is constituted by vibrating plates, which are also actuated hydraulically and are adapted to compact the crushed rock located in the layer above the laying plane of the ties in the intermediate ballast regions and on the heads of the ties. The first and second units are supported by a portal-shaped chassis of the car , are mutually spaced by an extent which is a multiple of the various spacing pitches of the ties of the track, and are arranged so that during working travel of the car the first unit precedes the second unit.