Patent ID: 6647892
Filing Date: 2003-11-18
Classification: E01B

Abstract:
A machine for treating a track extending in a longitudinal direction and comprised of two rails fastened to ties supported on ballast, comprisinga) a machine frame supported for mobility on the track by undercarriages; b) a working unit mounted on the machine frame; and c) a track lifting unit vertically adjustably mounted on the machine frame and comprising 1) a tool frame; 2) lifting drives connecting the tool frame for vertical adjustment to the machine frame; 3) flanged rollers for supporting the tool frame on each rail of the track, respectively; 4) two pairs of lifting rollers, mounted on the tool frame in the region of each rail, respectively, and spaced from one another in the longitudinal direction, each pair having a transverse adjustment drive for squeezing the two lifting rollers together transversely to the longitudinal direction, and 5) a respective vertical adjustment drive for independent vertical adjustment of each pair of lifting rollers with respect to the tool frame, wherein a spacing-apart motion of the two lifting rollers of each pair by the transverse adjustment drive is coupled to an automatic actuation of the associated vertical adjustment drive for lowering the pair of lifting rollers with respect to the tool frame.