Abstract: The invention relates to a method for determining an actual position of rails of a track by means of an optical sensor device, positioned on a rail vehicle, for recording the position of the track and adjacent installations. In this, it is provided that, by means of the sensor device, a course of the track and a course of the adjacent installations, in particular a catenary installation, are recorded for a track section as preliminary actual data, and that the preliminary actual data are transformed into corrected actual data in an evaluation device in that a recorded course of at least one adjacent installation is transformed into a course with a specified geometric shape. In addition, the invention relates to a system for implementing the method.

Abstract: The invention relates to a measuring device (13) for recording a track geometry of a track (5) immediately after a treatment of the track (5) by means of track maintenance machine (1), wherein the measuring device comprises wheel axles (16) for travelling on the track (5), connecting elements (15) for mounting to the track maintenance machine (1) and a data interface (41) for exchanging data with the track maintenance machine (1). Further, the measuring device (13) comprises an assembly frame (22) on which an inertial measuring unit (14) is arranged, wherein a front wheel axle (16) and a rear wheel axle (16) are mounted on the assembly frame (22) for rotation relative to one another about an axis of rotation (21) extending orthogonally to the wheel axles (16). Thus, an efficient check measurement of the lateral, longitudinal and vertical position of the track (5) is possible.

Abstract: The invention relates to a machine for stabilizing a track, including a machine frame supported on on-track undercarriages and a vertically adjustable stabilizing unit designed to roll on rails of the track by means of unit rollers, the stabilizing unit comprising a vibration exciter with rotating imbalance masses for generating an impact force (FS) acting dynamically in a track plane perpendicularly to a track longitudinal direction and a vertical drive for generating a vertical load acting on the track. In this, it is provided that the vibration exciter comprises at least two imbalance masses which are driven applying a variably adjustable phase shift (??1, ??2). The invention further relates to a method for operating such a machine.

Abstract: The invention relates to a method for load monitoring of a tamping unit of a track maintenance machine, wherein at least one sensor is arranged for recording a load on the tamping unit. In this, measuring data recorded by means of the sensor are stored over a time period (T) in an evaluation device, wherein at least one load-time progression for cyclical penetration operations of the tamping unit into a ballast bed is derived from the stored measuring data. With this, conclusions can be drawn as to the load stress situation of the tamping unit and the condition of the ballast bed.

Abstract: A rail-guided permanent way machine is operated by means of a control device in such a way that at least one state variable (Z) of the permanent way machine is determined in dependence on an operating state, and the at least one state variable is compared to at least one pre-defined limit value (GW, GS) for monitoring a derailment safety of the permanent way machine. Thus, the derailment safety of the permanent way machine is determined in accordance with the current operating state and monitored. As a result, the permanent way machine has an expanded operating range and increased performance and thus increased efficiency.

Abstract: The invention relates to a mobile device for correction of a vertical position of a pre-measured track, in particular for a track maintenance machine, including a measuring system which comprises a moving chord as reference base, and including a lifting device for lifting the track to a target level prescribed at a work location by means of the moving chord. In this, the moving chord is defined at two reference locations as to its position relative to a non-corrected area of the track, wherein the work location is arranged behind the reference locations in a working direction. In this manner, the position of the moving chord is defined unambiguously and precisely at all times.

Abstract: A device for welding a rail joint of a track, comprising two rail clamping devices spaced from one another in a rail longitudinal direction which are connected to one another via push rods to press rail ends apart prior to welding. In this, it is provided that at least one rail clamping device is coupled to a transverse displacement device for flush-aligning the rail ends after being pressed apart.

Abstract: The invention relates to a tamping assembly for tamping sleepers of a track, comprising a tamping unit having oppositely positioned tamping tools which are mounted on a lowerable tool carrier and connected in each case to a squeezing drive for generating a squeezing motion, wherein an eccentric drive having an eccentric shaft is provided for generating a vibratory motion. In this, it is provided that each squeezing drive is supported on a console having a ring-shaped housing section which is mounted on an eccentric section, associated with the squeezing drive, of the eccentric shaft.

Abstract: The invention relates to a method for contactless recording of a track geometry of a track by means of a rail vehicle which is moved along the track on on-track undercarriages (4), wherein profile data of the track extending in transverse direction are compiled by means of a laser scanner. In this, it is provided that, by means of an evaluation device, profile data are evaluated relative to a reference base pre-defined on the rail vehicle in order to derive from this the course of a track central axis and/or a rail. The invention additionally relates to a rail vehicle which comprise an evaluation device configured for carrying out the method. Thus, no further measuring system is required to determine a track position.

Abstract: The invention relates to a method of controlling a track maintenance machine, particularly a switch tamping- or universal tamping machine, which moves along a track and has working units, particularly a tamping unit and a lifting unit, which are adjustable relative to a machine frame, wherein position data of track objects, particularly sleepers, rails and optionally obstacles, are recorded by means of a sensor device in front of the working units in a working direction, and wherein operating positions of the working units are determined for a working operation at a track location. In this, prior to actuation of the working units, the determined operating positions of the working units are displayed by means of a display device, wherein, prior to carrying out the working operation, the operating positions of the working units can be changed by means of control elements.

Abstract: The invention relates to a machine for profiling and distributing ballast of a track, having a frame supported on on-track undercarriages and lateral ballast pick-up devices which are adjustably fastened to the frame, wherein each ballast pick-up device is actuated by a conveyor drive. In this, the machine is designed in such a way that, in an inoperative position, the upper contours of the machine are arranged below a delimiting plane which slopes downward in the working direction and extends through a field of vision of a driver's cabin of a rail vehicle to be coupled to the machine at the rear end thereof. Thus, the machine can be employed as a leading wagon of the rail vehicle, wherein sufficient visibility from the driver's cabin to the track is ensured.

Abstract: The invention relates to a measuring device (13) for recording a track geometry of a track (5) immediately after a treatment of the track (5) by means of track maintenance machine (1), wherein the measuring device comprises wheel axles (16) for travelling on the track (5), connecting elements (15) for mounting to the track maintenance machine (1) and a data interface (41) for exchanging data with the track maintenance machine (1). Further, the measuring device (13) comprises an assembly frame (22) on which an inertial measuring unit (14) is arranged, wherein a front wheel axle (16) and a rear wheel axle (16) are mounted on the assembly frame (22) for rotation relative to one another about an axis of rotation (21) extending orthogonally to the wheel axles (16). Thus, an efficient check measurement of the lateral, longitudinal and vertical position of the track (5) is possible.