TAMPING MACHINE FOR RAILWAY BALLASTS, RAILWAY CAR AND USE OF TAMPING MACHINE FOR MAKING AND REGENERATING RAILWAY BALLASTS

摘要

A tamping machine, particularly for regenerating railway ballasts, includes: a supporting frame, a vibrating tamping hammer pivoted to the frame, and a hydraulic actuator engaged with a thrusting portion of the tamping hammer. The actuator includes first and second axially aligned sections engaged with each other, one of which is engaged with the thrusting portion of the tamping hammer and the other section is engaged with an abutment portion. The first section is extendable while the second section is supplied by distributing means having an alternate cyclical operation for enabling the tamping hammer to vibrate. The second section is a jacket extending between a first and second longitudinal ends, and a piston slidingly movable inside the jacket. The jacket is closed at the first and second longitudinal ends; the piston exhibits an overall axial size defined by respective thrusting opposite faces of the piston itself, which is entirely contained inside the jacket.