Machine for treating a track

摘要

A track working machine includes a track-bound machine frame and a working unit mounted on the machine frame. A track lifting unit is vertically adjustably mounted on the machine frame and includes a tool frame, lifting drives connecting the tool frame for vertical adjustment to the machine frame, and flanged rollers for supporting the tool frame on each rail of the track. Two pairs of lifting rollers are mounted on the tool frame in the region of each rail, and spaced apart in longitudinal direction. Each pair has a transverse adjustment drive for squeezing the lifting rollers together transversely to the longitudinal direction, and a vertical adjustment drive for independent vertical adjustment of the lifting rollers relative to the tool frame. Distancing of the lifting rollers of each pair is coupled to automatic actuation of the associated adjustment drive for lowering the lifting rollers relative to the tool frame.