Patent ID: 6805059
Filing Date: 2004-10-19
Classification: E01B

Abstract:
A tamping machine for tamping ballast underneath ties of a track, comprising:a) a machine frame extending in a longitudinal direction and supported on the track by two undercarriages for mobility in an operating direction; b) a sub-frame arranged between the said undercarriages and supported for mobility on the track by a further undercarriage comprising a unit motive drive, the sub-frame being connected to the machine frame by means of a frame support for displacement relative thereto in the longitudinal direction; c) a vertically adjustable tamping unit and track lifting unit arranged on the sub-frame between the further undercarriage and the frame support; and d) an acceleration drive provided for assisting the unit motive drive in displacing the sub-frame in the longitudinal direction, the acceleration drive being rigidly connected to the machine frame by means of a drive fastening and comprising a piston end including a bracing plunger provided for temporary application to the sub-frame, wherein a maximum stroke m of the acceleration drive is shorter than a maximum displacement path a of the sub-frame relative to the machine frame.