| 摘要 |
A machine (1) for treating a track (3) comprises a machine frame (5), supported on on-track undercarriages (4), which includes a track lifting uni t (12). The latter is equipped with a tool frame (13), vertically adjustably connected to the machine frame (5) by means of lifting drives (27), on which are arranged, per rail (16) of the track (3), two pairs (23), spaced from on e another in the longitudinal direction of the rails, of lifting rollers (24) squeezable towards one another in the transverse direction of the track by means of a transverse adjustment drive (25), as well as a flanged roller (14 ) provided for rolling on a running surface (15) of the rail (16). Each pair (23) of lifting rollers (24) is designed for independent vertical adjustment with respect to the tool frame (13) by means of a vertical adjustment drive (26). A spacing-apart motion of the two lifting rollers (24), positioned adjacent on e another in the transverse direction of the track, is coupled to an automatic actuation of the vertical adjustment drive (26) for lowering both lifting rollers (24) wi th respect to the tool frame (13).
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