Abstract: A rail treatment machine, mobile on a track, for removing irregularities on a rail head surface of at least one rail of a laid track, includes a machine frame supported on a front on-track undercarriage and a rear on-track undercarriage, as seen in a working direction. A tool frame accommodates at least one tool carrier. A rear end of the tool frame is articulated on the rear on-track undercarriage in an articulation point on a vertical axis of rotation. A front end of the tool frame is supported on a separate on-track undercarriage situated between the front on-track undercarriage and the rear on-track undercarriage.

Abstract: For tamping a track, tamping tines are squeezed towards one another in pairs by a squeezing cylinder. A vibration is superimposed on a linear lift motion of a squeezing piston movable in the squeezing cylinder. The vibration is generated by a vibration piston which is arranged in the squeezing cylinder and which is movable independently of the squeezing piston.

Abstract: A method for the correction of vertical position error of a track by a track tamping machine and a dynamic track stabilizer. Starting from a registered actual position, an over-lift value is prescribed for a treated track location with which the track is lifted into a preliminary over-lift track position and tamped. The track is subsequently lowered by dynamic stabilization into a resulting final track position. In this, a smoothed actual position course is formed from a course of the actual track position, wherein an over-lift value is prescribed for the treated track location in dependence of the course of the actual track position with regard to the smoothed actual position course. In this way, only short-wave track faults are treated with an over-lift value.

Abstract: The invention relates to a measuring arrangement for monitoring a railway track having rails fastened to sleepers, wherein a fibre optic cable is connected to a measuring device in order to detect a strain acting on a rail. In this, the fibre optic cable is clamped in a detachable manner into at least one rail fastening. In this way, a strain transmitted from the rail via the rail fastening to the sleeper acts directly on the fibre optic cable.

Abstract: The invention relates to a tamping unit (1) for tamping sleepers (2) of a track (3), having a tool carrier (6) mounted on an assembly frame (12) for vertical adjustment by means of a drive (10), having pairs of two oppositely positioned tamping tools (5) which are squeezable towards one another about a respective pivot axis (4) as well as designed to be set in vibrations by a vibration drive (8). In this, it is provided that a vibration drive (11) is associated with the drive (10), the vibration drive setting the tamping tools in a vibration which is effective vertically.

Abstract: A longitudinal beam of a track maintenance vehicle is connected at a beam exterior side—facing away from the opposite longitudinal beam—to a rail transport device provided for receiving rails. The rail transport device is displaceable by means of a displacement drive in the transverse direction of the machine relative to a machine frame within a displacement path s delimited by a transport—and a loading position.

Abstract: A longitudinal beam of a track maintenance vehicle is connected at a beam exterior side—facing away from the opposite longitudinal beam—to a rail transport device provided for receiving rails. The rail transport device is displaceable by means of a displacement drive in the transverse direction of the machine relative to a machine frame within a displacement path s delimited by a transport—and a loading position.

Abstract: 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 (sr) of the track grid (5). In this manner, the amplitude (ar) of the sleeper deflection can be recorded, which is a measure of the actually effective vibration for stabilizing the track.

Abstract: Ballast (3) located underneath of sleepers of a track is compacted by immersion and squeezing of compacting tools (7) set in vibrations. The vibrations introduced into the ballast (3) during the compacting process are registered as a measure of the ballast compaction. Thus, it is possible to obtain a homogenously compacted track even in the event of different ballast characteristics.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a rail vehicle (1) having a machine frame (2) supported on on-track undercarriages (4), on both sides of which are arranged—in the longitudinal direction (3) of the rail vehicle—crane rails (8) for a mobile gantry crane (11). In this, for lifting or lowering of the gantry crane (11), a crane rail section (12) of the respective crane rail (8) is arranged to be vertically adjustable by a drive (18). In this manner, contrary to the prior art, a higher gantry crane (11) can be used without violating a given clearance profile during transfer travel.

Abstract: A tamping unit for tamping a track has tamping tines which are designed for immersion into a ballast bed and which can be set in vibrations by a vibration drive. The vibration drive includes a housing in which a shaft including an eccentric is arranged for rotation about a shaft axis. A transmission element for transmitting a vibratory motion is mounted on the eccentric. The eccentric is connected to the shaft in a rotation-locked and radially displaceable manner, wherein the position of the eccentric relative to the shaft is adjustable in radial direction by an adjustment device. Thus, while retaining the advantages of an eccentric drive, it is possible to adjust vibration parameters during operation.

Abstract: A track maintenance machine includes a machine frame being movable on a track, a plurality of working units, and a combustion engine to be connected by a clutch to a transfer case. Hydraulic pumps for supplying a plurality of hydraulic drives of a hydraulic system are connected to the transfer case. An electric motor is provided as an alternative drive of the transfer case for permanent energy supply of the working units and drives. The electric motor is coupled to an intermediate circuit to be supplied with electric energy by a vertically adjustable pantograph to be applied to a catenary of the track. A generator or an electric energy storage device is provided for alternative energy supply of the intermediate circuit. A method for operation of an energy supply system is also provided.

Abstract: A machine having a ballast take-up device for taking up ballast located underneath a track. The take up device has an endless clearing chain guided in a chain channel. In a connecting joint from a transverse channel to a transport channel. There is also a ballast deflector blade pivotable about a pivot axis. Arranged on the ballast deflector blade is a ballast conveyor, designed for ballast transport in the direction towards a pivot axis by means of a conveyor drive. With this, it is possible to expand the operating range of the ballast take-up device, as needed.

Abstract: Provided in a tamping unit for tamping a track are squeezing drives (14) for a squeezing motion of tamping tines. In a hydraulic cylinder (19)—having a squeezing piston (17) with a piston rod (18)—of the squeezing drive (14), a first pressure chamber (20) for producing the squeezing motion (8) is provided. Additionally arranged is a second pressure chamber (21) for producing an opening motion directed opposite to the squeezing motion, and a third pressure chamber (22) provided for producing vibrations.

Abstract: A method for determining vertical and lateral position faults of a track employs a track position measuring system having a common reference base formed of a single measuring chord disposed centrally between the rails and extending in the longitudinal direction of the machine. Two sensors are disposed on a central track position measuring unit for determining a longitudinal height and for determining a versine. The sensors each contact the measuring chord. Each track position measuring unit has two laser scanners, which are associated with respective rails, for scanning in a y-axis extending normal to a longitudinal direction of the rails and in a z-axis extending in a vertical direction. A track maintenance machine for carrying out track position corrections is also provided. Thus, a simplification of the track position measuring system with increased accuracy can be achieved.

Abstract: During the tamping of a switch, a switch section delimited by two adjacent sleepers is photographed in a front machine section for producing a reference photo, and the photo is stored. The stored reference photo is automatically made available on a monitor, positioned in a work cabin, for observation by an operator as soon as the tamping tools are situated above the section of the switch shown by the reference photo.

Abstract: A transport vehicle includes a container for receiving bulk material which is disposed on a vehicle frame and is pivoted, together with a bottom conveyor belt and a third conveyor belt, relative to the vehicle frame about a pivot axis extending in a longitudinal direction of the vehicle in order to maintain a horizontal conveying plane, relative to a transverse direction of the vehicle, for the bottom conveyor belt and the third conveyor belt, independently of a transverse inclination of the track. Thus, a problem-free bulk material transport is possible even in the event of a transverse inclination of the track. A method of loading and unloading a transport vehicle which is mobile on a track is also provided.