A tamping machine for tamping a track has a lifting-lining unit, connected to lifting and lining drives, for shifting the track into a target position. A vibration generator, which can be set to vibrate, is disposed on the lifting-lining unit. It is thereby possible to tamp a track section in a first working pass and to lower it in a controlled way in an immediately following second working pass with constant impact of vertical load and vibration. Thereafter, the track can be traveled upon with normal speed entirely unhindered.

A machine (1) for stabilization of a track (2) has a machine frame (5), mobile on the track by means of on-track undercarriages, on which a stabilizing unit (4) is arranged which has vertical adjustment drives (6) as well as a vibration exciter (7). The stabilizing unit is designed to be displaceable relative to the machine frame (5) in a longitudinal direction (23) of the machine by means of a longitudinal displacement drive (24).

A machine (1) for stabilization of a track (2) has a machine frame (5), mobile on the track by means of on-track undercarriages, on which a stabilizing unit (4) is arranged which has vertical adjustment drives (6) as well as a vibration exciter (7). The stabilizing unit is designed to be displaceable relative to the machine frame (5) in a longitudinal direction (23) of the machine by means of a longitudinal displacement drive (24).

The invention relates to a machine for compacting a ballast bed of a track with a machine frame supported on rail-based running gears and a height-adjustable stabilising unit connected thereto, comprising a vibration drive and an axle with wheel flange rollers movable on rails of the track, whose distance to each other extending perpendicularly to the longitudinal direction of the machine can be varied by means of a spreading drive, as well as a roller clamp that can be pressed against the rails by means of clamping drives. The spreading drive and/or the clamping drives are set up to apply a predefined variable horizontal load force to the rails, whereby a measuring device is arranged to detect a rail head deflection and/or track gauge change caused by the variable load force. In this way, it can be determined by means of the stabilising unit whether the track panel is intrinsically stable.

The invention relates to a machine for compacting a ballast bed of a track with a machine frame supported on rail-based running gears and a height-adjustable stabilising unit connected thereto, comprising a vibration drive and an axle with wheel flange rollers movable on rails of the track, whose distance to each other extending perpendicularly to the longitudinal direction of the machine can be varied by means of a spreading drive, as well as a roller clamp that can be pressed against the rails by means of clamping drives. The spreading drive and/or the clamping drives are set up to apply a predefined variable horizontal load force to the rails, whereby a measuring device is arranged to detect a rail head deflection and/or track gauge change caused by the variable load force. In this way, it can be determined by means of the stabilising unit whether the track panel is intrinsically stable.

A track maintenance machine, constructed to be mobile on a track, for consolidation of a ballast bed underneath a track, includes a machine frame supported on an undercarriage and a consolidating device, connected to the machine frame, which includes at least one consolidating element constructed to be lowered. The consolidating element is constructed as a consolidating plate which, in a working position, is larger in a longitudinal direction of the track than a distance between two sleepers of the track, and the consolidating plate is disposed to be rotatable in order to turn the consolidating plate into a passing position for lowering or raising between two sleepers. A method for consolidation of the ballast bed underneath a track by using a track maintenance machine is also provided.

A track maintenance machine, constructed to be mobile on a track, for consolidation of a ballast bed underneath a track, includes a machine frame supported on an undercarriage and a consolidating device, connected to the machine frame, which includes at least one consolidating element constructed to be lowered. The consolidating element is constructed as a consolidating plate which, in a working position, is larger in a longitudinal direction of the track than a distance between two sleepers of the track, and the consolidating plate is disposed to be rotatable in order to turn the consolidating plate into a passing position for lowering or raising between two sleepers. A method for consolidation of the ballast bed underneath a track by using a track maintenance machine is also provided.

A tamping machine includes at least one first tamping unit with first tamping tools and a first hydraulic motor provided with a first drive shaft driving the first tamping tools so as to generate tamping movements, and a second tamping unit adjacent the first tamping unit with second tamping tools and a second hydraulic motor provided with a second drive shaft driving the second tamping tools so as to generate tamping movements. The first hydraulic motor and the second hydraulic motor are supplied with power by a common synchronized hydraulic power supply system.

A tamping machine includes at least one first tamping unit with first tamping tools and a first hydraulic motor provided with a first drive shaft driving the first tamping tools so as to generate tamping movements, and a second tamping unit adjacent the first tamping unit with second tamping tools and a second hydraulic motor provided with a second drive shaft driving the second tamping tools so as to generate tamping movements. The first hydraulic motor and the second hydraulic motor are supplied with power by a common synchronized hydraulic power supply system.

The invention relates to a machine (1) having a machine frame (2), mobile by means of on-track undercarriages (3) on rails (4) of a track grid (5), and a stabilizing unit (8) which comprises a vibration exciter (15) for generating horizontal vibrations extending transversely to the longitudinal direction of the machine and flanged rollers (10) designed to roll on the rails (4). In this, a camera (11) is mounted on the machine frame (2) for recording a section of the track grid (5) set in vibrations, wherein the camera (11) is connected to an evaluation device (16) in order to derive from the recorded image data a resulting deflection (s.sub.r) of the track grid (5). In this manner, the amplitude (a.sub.r) of the sleeper deflection can be recorded, which is a measure of the actually effective vibration for stabilizing the track.