Abstract: A tamping machine for compacting the ballast bed of a track comprises at least two tamping units for each side of the tamping machine, which units can be displaced transversely relative to the longitudinal direction of the tamping machine by means of a transversal displacement device. At least two guides, in particular motion bars or sliding tubes are associated with both tamping units of each side of the tamping machine, said guides being offset in relation to one another with respect to their height and in the longitudinal direction of the tamping machine. Each outer tamping unit and its associated guides can be displaced transversely to the longitudinal direction of the tamping machine using an adjusting drive and the inner tamping unit can be displaced on the same guides, independently of the outer tamping unit, transversely to the longitudinal direction of the tamping machine using an adjusting drive.

Abstract: A tamping assembly for a track tamping machine has a pair of tamping tools arranged on a carrier (2) so it is vertically adjustable in a tamping assembly frame and is designed as a rocker arm, the lower tamping pick ends (5) of which, which plunge into a ballast bed (4), are drivable in opposite directions using an oscillation drive (6) and can be fed hydraulically toward one another. To increase the stability of the tamping assembly, a hydraulic cylinder (11) and a distance sensor (12) for determining the hydraulic cylinder position are associated with each of the tamping tools (3) of a tamping tool pair, wherein the hydraulic cylinders (11) form the feed drive and also the oscillation drive (6) of the tamping tools (3) and the hydraulic cylinders (11) are activated in dependence on the distance sensor signal.

Abstract: A device is proposed for measuring tracks, in particular for track laying machines, having two outer, one front and one rear, track-traveling measurement carriages (15, 21) and a middle track-traveling measurement carriage (22) arranged in between. To enable advantageous measurements, it is proposed that at least one position encoder (14, 20) pointing toward the middle measurement carriage (22) is associated with each of the outer measurement carriages (15,21), and at least two optical sensors (16, 17), in particular cameras, are arranged on the middle measurement carriage (22) on an optical axis (34) such that at least one optical sensor is oriented toward the rear measurement carriage (15) and at least one other optical sensor is oriented toward the front measurement carriage (21).

Abstract: A tamping assembly for a track tamping machine has a pair of tamping tools arranged on a carrier (2) so it is vertically adjustable in a tamping assembly frame and is designed as a rocker arm, the lower tamping pick ends (5) of which, which plunge into a ballast bed (4), are drivable in opposite directions using an oscillation drive (6) and can be fed hydraulically toward one another. To increase the stability of the tamping assembly, a hydraulic cylinder (11) and a distance sensor (12) for determining the hydraulic cylinder position are associated with each of the tamping tools (3) of a tamping tool pair, wherein the hydraulic cylinders (11) form the feed drive and also the oscillation drive (6) of the tamping tools (3) and the hydraulic cylinders (11) are activated in dependence on the distance sensor signal.