A device is provided for monitoring the compaction of concrete introduced into a slipform of a slipform paver by means of at least one concrete compacting device that has an asynchronous motor for driving an unbalanced mass which generates vibrations. The monitoring device comprises an apparatus for monitoring the stator current of the asynchronous motor, the apparatus being configured such that a change in the compaction of the concrete is determined based on an analysis of the stator current. The apparatus for monitoring the stator current of the asynchronous motor is preferably configured such that the amplitude spectrum of the stator current is determined in order to analyse the stator current. It is advantageous that the compaction of the concrete is not monitored using sensors which are exposed to harsh ambient conditions during operation of the slipform paver.

The invention relates to a tamper device for a screed of a working machine, in particular a paver. The device comprises a rotatable driveable tamper shaft with an eccentric section, an 5 eccentric bushing mounted on the eccentric section, and a connecting rod rotatable mounted on the eccentric bushing for being driveable with stroke motions having a stroke, the stroke being adjustable by an rotational adjustment of a relative rotational positioning between the eccentric bushing and the eccentric section. The device further comprises an inner-toothed hollow 10 wheel gear train for providing the rotational adjustment. The gear train is connected to the tamper shaft, to the eccentric bushing, and to a drive force receiving element configured to be able to receive a drive force for driving the innertoothed hollow wheel gear train when the tamper shaft is rotating.

The disclosure relates to a screed arrangement for a road paver comprising a base screed, a first extending screed and a second extending screed, the first extending screed and the second extending screed being arranged in front of the base screed in a pulling direction of the screed arrangement and being movable transversely to the pulling direction relative to the base screed, wherein at least one of the two extending screeds comprises a material deflecting member configured to displace paving material transversely to a pulling direction of the screed arrangement when the extending screed is stationary relative to the base screed, wherein the first extending screed comprises the material deflecting member, wherein the second extending screed is positioned further away from the base screed in the pulling direction than the first extending screed.

Method for laying down a pavement consisting of paving material with a road paver screed in which a compaction unit pre-compacts the paving material at cyclical work cycles with a selectable stroke and at a selectable frequency while the pavement is laid down at a selectable paving speed and at least the stroke is automatically adjustable in response to paving parameters.

A paving machine is disclosed. The paving machine may have a screed assembly having a left screed section and a right screed section. The paving machine may also have a crown actuator configured to pivot the left and right screed sections about the centerline. The paving machine may have a crown profile sensor configured to detect the crown profile (DP), and a cross slope sensor configured to detect a cross slope (QNL*, QNR*) of the screed assembly. Further, the paving machine may have a controller configured to determine the crown profile (DP) and a cross slope (QNL*, QNR*) of the screed assembly. The controller may calculate a left cross slope (QNL) of the left screed section and a right cross slope (QNR) of the right screed section based on the determined crown profile (DP) and the determined cross slope (QNL*, QNR*), and display the crown profile on the display device.

A vibratory head for a concrete vibrator includes elongate structures suitable for use to consolidate uncured concrete in a horizontal or flat application.

A device for inserting dowel bars, the device having at least one floor plate, and the at least one floor plate defines a slot. One or more bar holders are provided, and the one or more bar holders are positioned above the slot defined within the at least one floor plate. The one or more bar holders are capable of holding a dowel bar, but the one or more bar holders are capable of allowing the dowel bar to move through the slot defined within the at least one floor plate when the dowel bar is pushed. The device has at least one fork movable longitudinally with respect to the at least one floor plate. Additionally, the device moves in a forward direction over a newly formed concrete slab, and the fork is capable of being lowered to push a dowel bar downward into the newly formed concrete slab.

The disclosure relates to a road finishing machine with a screed for producing a paving layer, wherein the screed includes at least one compacting unit for precompacting paving material supplied to the screed. The compacting unit includes at least one eccentric bushing mounted on an eccentric shaft supporting the same at a desired angle of rotation to thereby continuously variably set a desired tamper stroke of a tamper bar of the compacting unit. For rotating the eccentric bushing on the eccentric shaft, an adjusting mechanism mounted spaced apart from the eccentric shaft and at least partially rotatable along with a rotary motion of the eccentric shaft can be activated. Furthermore, the disclosure relates to a method for a continuously variable tamper stroke adjustment at a compacting unit of a road finishing machine.

The disclosure relates to a road finishing machine with a screed for producing a paving layer, wherein the screed includes at least one compacting unit for precompacting paving material supplied to the screed. The compacting unit includes at least one eccentric bushing mounted on an eccentric shaft supporting the same and rotatable to a desired angle of rotation to thereby continuously variably set a desired tamper stroke of a tamper bar of the compacting unit. For rotating the eccentric bushing, the compacting unit includes at least one adjusting mechanism, wherein the adjusting mechanism includes an adjusting drive mounted on the eccentric shaft and rotatable along with the eccentric shaft. The disclosure furthermore relates to a method for a continuously variable tamper stroke adjustment at a compacting unit of a road finishing machine.

A method for paving a road surface, wherein a paving data set is read into an on-board computer of a road construction machine. During a paving operation, working components of the road construction machine are controlled for paving the road surface on the, basis of the read-in paving data set. Before start of the paving operation, the paving data set is compared by a computing unit with a property profile of the road construction machine stored in a profile memory and, based on a result of the comparison, an assessment is made as to whether the road construction machine is suitable for paving the road surface.