Wirtgen Gmbh

Axel Mahlberg

Günter Hähn

Cyrus Barimani

Christoph Menzenbach

Lothar Schwalbach

Herbert Lange

Stefan Wagner

Bernd Holl

Kay Heemann

Sebastian Bötzius

Markus Bach

Christian Berning

Martin Lenz

Guenter Haehn

Tobias Stinner

Holger Thieme

Raymond Smolders

Klaus Vollmann

Markus Schäfer

Mahmoud Deeb

Sebastian Boetzius

Rolf David Pancho Yanza

Viktor Stremel

Eduard Fitz

Björn Buchholz

Stefan Scheer

Markus SCHÄFER

Christioph Menzenbach

A self-propelled earth working machine includes a traveling gear, a machine frame supported by the traveling gear, a power source accommodated on the machine frame for providing power for a travel operation and/or for an earth working operation, a working apparatus accommodated on the machine frame for earth working, and a cooling device for cooling a functional device of the earth working machine. The cooling device includes at least one heat exchanger system for transferring heat from a cooling medium to air, and a ventilator system, which is on the one hand designed and situated to produce a cooling air flow passing the heat exchanger system and which is on the other hand designed and situated to produce in the area of the power source a ventilation air flow flowing away from the power source. The heat exchanger system and a ventilation volume, in which the ventilation air flow flows away from the power source, are situated on the suction side of the ventilator system, the ventilation volume being situated downstream of the heat exchanger system relative to the cooling air flow, so that the ventilation air flow generated by the ventilator system meets the cooling air flow downstream of the heat exchanger system and upstream of the ventilator system.

Self-propelled earth working machine including combined heat exchanger cooling and engine compartment ventilation

A self-propelled construction machine comprises a machine frame, at least three travelling devices, at least one hydraulic drive system for driving at least two travelling devices, wherein the hydraulic drive system comprises at least one controllable hydraulic motor with variable displacement volume and at least one hydraulic pump, at least one working device (e.g. a milling drum), for working the ground pavement. A detection device detects fluctuations in the longitudinal speed of the construction machine during movement thereof, wherein a control unit alters the displacement volume of the at least one controllable hydraulic motor as a function of the detected fluctuations so that the natural frequency of the hydraulic drive system is altered, wherein the control unit adjusts the discharge volume of the pump as a function of the amount of adjustment of the displacement volume in such a fashion that the specified drive speed remains constant.

Self-propelled construction machine and method for working ground pavements

An earth working machine (), in particular a road milling machine, a stabilizer, or the like, having a milling drum () that is mounted rotatably on a machine frame () and is populated or populatable on its outer circumference with working tools (); the working tools () to come into contact, during working operation, with the ground that is to be worked to remove it; a drive unit () drives the milling drum () by means of a drive motor (); an input drive shaft () couplable to the drive motor () is attached to the milling drum (); and a ballast element, constituting a kinetic mass (), increases the kinetic energy of the milling drum (). The kinetic mass () is couplable to or decouplable from the rotatable milling drum (), or a rotational member indirectly or directly coupled to the milling drum (), via a shiftable coupling ().

Earth working machine

In a self-propelled construction machine (), in particular road milling machine, recycler, stabilizer or surface miner, comprising a machine frame (), at least two travelling devices (), at least one hydraulic drive system () for driving at least two travelling devices (), at least one working device, in particular a milling drum (), for working the ground pavement (), it is provided for the following features to be achieved: a detection device () is provided which detects fluctuations in the longitudinal speed (v) of the construction machine () during movement of the construction machine (), wherein a control unit () controls the hydraulic drive system () as a function of the detected fluctuations in such a fashion that the drive speed (v) for driving the travelling devices () specified by means of the hydraulic drive system () is continuously adjusted so that the detected fluctuations are reduced or compensated for.

The invention relates to a working device for a ground-processing device having a milling drum with a milling drum tube on whose surface working tools are mounted in a projecting manner and are intended to come into contact with the material to be milled during the milling process, wherein the working device has a powertrain for driving the milling drum. In order to improve the running smoothness of a ground-processing machine, provision is made according to the invention for at least one load weight to be arranged, preferably interchangeably, on the powertrain and/or on the milling drum to increase the kinetic energy.

Working device

In a self-propelled road milling machine for working road surfaces, comprising a machine frame, comprising a milling drum mounted to rotate and extending in axial direction transverse to the direction of travel, and a milling drum housing enclosing the milling drum, where the milling drum comprises multiple tools circumferentially preferably arranged in the shape of a helix, where the tools, except for the axial peripheral area, feature a specified mutual line spacing, it is provided for the following features to be achieved: an oscillation drive exercises an oscillation stroke on the axis of the milling drum moving to and fro in axial direction relative to the machine frame, where the rotating movement of the tools is superimposable with an axial movement parallel to the axis of the milling drum, the stroke of which is adjustable to the line spacing between two axially neighboring tools.

Self-propelled road milling machine for working road surfaces, as well as method for working road surfaces with a road milling machine

A control system for a construction machine senses the reaction forces applied by the ground surface to a milling drum, and in response to the sensed changes in those reaction forces controls the rate of feeding the milling drum into the ground surface.

Adaptive advance drive control for milling machine

In an automotive road construction machine (), with a working drum () for working a ground surface or traffic surface () mounted at a machine frame (), a combustion engine () for driving the working drum (), and a drive train () between the combustion engine () and the working drum (), it is provided that at least one vibration damper () and/or vibration absorber is arranged at the working drum () or in the drive train () downstream of the combustion engine (), with the said vibration damper () and/or vibration absorber eliminating or reducing rotary vibrations generated by the combustion engine ().

Self-propelled road construction machine

An adaptive advance control system for a construction machine senses the reaction forces applied by the ground surface to a milling drum, and in response to the sensed changes in those reaction forces controls the rate of lowering the milling drum into the ground surface. Early and rapid detection of such changes in reaction forces allow the control system to aid in preventing lurch forward events of the construction machine.

Construction machine, with working drum mounted at a machine frame, combustion engine for driving the working drum, drive train between the combustion engine and the working drum, and clutch in the drive train, where the clutch is arranged between a drive shaft and output shaft of the drive train, clutch elements on drive side capable of being engaged with clutch elements on output side, where clutch elements on the drive side or on output side are provided with several clutch part elements that are permanently engaged with one another via at least one mechanical coupling, it is provided that a braking device acting between the drive shaft and the output shaft is arranged at the clutch, said braking device being additionally engaged during engagement of the clutch in order to eliminate or reduce any rotary vibrations caused by play of mechanical coupling between clutch part elements.

Construction machine, as well as clutch for switching the power flow

An adaptive advance control system for a construction machine senses the reaction forces applied by the ground surface to a milling drum, and in response to the sensed changes in those reaction forces controls the motive power applied to an advance drive of the machine. Early and rapid detection of such changes in reaction forces allow the control system to aid in preventing lurch forward events of the construction machine.

A road milling machine having a milling roller with a plurality of chisels. A signal receiving unit is assigned to a machine component which is directly or indirectly involved in the milling process or to another machine component. The signal receiving unit detects an operating condition of the machine component and is connected to a signal emitting unit. An optical detecting device may be assigned to the road milling machine, whereby operations are made easier and the milling pattern is optimized.

Road milling machine with optimized operation

In a device for inserting dowels ( ) in the vicinity of transverse expansion joints of freshly laid concrete road surfaces ( ), comprising a machine frame ( ) supported by traveling mechanisms ( ), at least one storage container ( ) for the dowels ( ), a smoothing board ( ) resting on the road surface ( ) and including slits ( ) running in a direction of travel and provided for accommodating the dowels ( ), a retaining device ( ) for the dowels on the slots ( ), and a dowel placing device ( ), it is provided that a line conveyor device ( ) accepts separated dowels ( ) in a section ( ) of a bottom or lateral area ( ) of the storage container ( ) and delivers the dowels ( ) to the slots in the smoothing board ( ).

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Hennef, Germany

Axel Mahlberg