Machine for rehabilitating a ballast bed

A mobile machine for rehabilitating a ballast bed supporting a track comprising two rails fastened to ties, each rail having a field side and a gage side, which comprises

• (a) an elongated machine frame extending in a longitudinal direction and supported by spaced apart undercarriages on the track for mobility in an operating direction, and the following structures mounted on the machine frame between the undercarriages:
• (b) a vertically adjustable device for excavating ballast,
• (c) a ballast discharge device arranged rearwardly of the ballast excavating device in the operating direction, the ballast discharge device comprising
• (1) a conveyor band extending in the longitudinal direction and having a discharge end, the conveyor band being mounted on the machine frame for displacement in said direction relative to the machine frame during the ballast bed rehabilitating operation,
• (d) a track lifting device and a vertically adjustable ballast tamping head arranged rearwardly of the discharge end of the ballast discharge device, the track lifting device comprising
• (1) flanged rollers supporting the track lifting device on the track, and the ballast tamping head comprising
• (2) reciprocable tamping tools for tamping the discharged ballast,
• (e) a common carrier frame for the track lifting device and the ballast tamping head, and
• (f) a longitudinal displacement drive for displacing the common carrier frame in the longitudinal direction relative to the machine frame, the conveyor band of the ballast discharge device being coupled to the common carrier frame for common longitudinal displacement therewith.