Abstract: A road finisher including an undercarriage, a chassis, a hopper, a paving screed, and a lifting device for lifting the chassis relative to the undercarriage at least in a rear region of the road finisher. The lifting device comprises a rocker mounted rotatably around an undercarriage rotational axis at an undercarriage-side bearing surface and rotatably around a chassis rotational axis at a chassis-side bearing surface. The lifting device further comprises a length-variable adjustment member connecting a chassis-side link point to a rocker-side link point and configured to change a distance between the chassis-side link point and the rocker-side link point by changing its length to selectively lift or lower the chassis relative to the undercarriage. A distance between the chassis rotation axis and the undercarriage rotation axis is greater than a distance between the chassis rotation axis and the chassis-side bearing surface.

Abstract: A road finisher includes an undercarriage, a chassis which is adjustable in height relative to the undercarriage, an electronic control system, and a paving screed which is attached to tie bars, the tie bars each being hinged to the chassis at a pull point and the pull points each being adjustable relative to the chassis by means of a leveling cylinder. The control system comprises a receiving unit configured to detect an actual pull point height, an evaluation unit configured to calculate a deviation of the actual pull point height from a target pull point height caused by a height adjustment of the chassis relative to the undercarriage, and a command unit, which is configured to automatically at least partially correct the deviation by a correction signal sent from the command unit causing a hydraulic controller to adjust at least one of the leveling cylinders.

Abstract: A road finisher includes an undercarriage, a chassis, a hopper, a paving screed, and a lifting device for lifting the chassis relative to the undercarriage at least in a rear region of the road finisher. A locking element can be moved by a locking element actuator between a locked state, in which the locking element mechanically locks the chassis at a predefined transport height relative to the undercarriage, and a release state, in which the mechanical locking of the chassis is released at the transport height.

Abstract: A road-making machine is provided in the form of a road-finishing machine for producing a paving layer from a laying material or a charger vehicle for supplying the road-finishing machine with a laying material. The road-making machine comprises a material bunker, and a pushing means fixed forward of the material bunker at a chassis, such that pushing rollers of the pushing means may dock to rear tires of a truck. The pushing rollers comprise a pair of first pushing rollers mountable in a first position in a seat of a traverse of the pushing means. Either the pushing means is expandable by at least one changeable attachment to which the first pushing rollers may be mounted in a second position further forward with respect to the first position, or the pushing means comprises a pair of second pushing rollers which may be selectively positioned forward of the first pushing rollers.

Abstract: A construction machine is provided that has an operating platform, an access for entering the operating platform, a roof and an access control. The roof is disposed on a height-adjustable rack structure that can be actuated manually or by means of a drive in order to set the roof from an upper operating position to a lower transport position and vice versa. In this process, the access protection is moved from a storage position to a functional position in which the access to the operating platform is blocked by the access control.

Abstract: A method for operating a road paver comprises paving a road surface with the road paver along a road bed, wherein a paving screed of the road paver is drawn over the road bed along a paving direction of travel. The following steps are performed using a curve correction unit: determining a value defining a steering angle of the road paver; calculating based on the determined value an expected offset of the paving screed, which results from a yawing movement of the road paver during steering with the steering angle defined by the determined value; and automatically correcting a lateral extension position of at least one lateral extension part of the paving screed based on the expected offset, so that the offset is compensated. The disclosure also refers to a road paver comprising a corresponding curve correction unit.

Abstract: A road paver comprises a generator, a control device and a screed, the screed comprising a basic screed and being suited to be modified, by selectively attaching or detaching broadening parts, from a first to at least a second, different screed configuration. The basic screed and the broadening parts each comprise one compacting unit and one electric heating element to be supplied with power from the generator for heating the compacting unit to prevent the laying material from adhering to the compacting unit and to finish a high-quality road pavement. The control device is configured to individually switch on or off each one of the two resistance wire windings of the heating element of the basic screed depending on the screed configuration determined by the control device to distribute electrical power generated by the generator to the individual resistance wire windings.

Abstract: A road finishing machine includes a chassis, a material bunker for receiving paving material located at the front in the paving direction of the road finishing machine, and a screed for compacting paving material located at the rear in the paving direction of the road finishing machine. On a driver stand of the road finishing machine, a main control platform with primary operational controls is provided for controlling working components of the road finishing machine. The primary operational controls may be actuated by an operator located on the road finishing machine. An operation unit with a plurality of secondary operational controls is provided laterally at the chassis or the material bunker.

Abstract: The disclosure relates to a conveyor device that comprises a conveyor belt with a conveying strand for conveying bulk material and a return strand. The conveying strand has a conveying surface on which a material flow is running whose feed rate is given by the product of a linear velocity of the conveying strand and a conveying cross-section of the material flow. The disclosure is characterized by a variable flow limiting device that is movable between a first position and a second position. The conveying cross-section downstream of the flow limiting device is smaller in the second position than in the first position.

Abstract: 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.

Abstract: The disclosure relates to a road finishing machine having a chassis, a material bunker for receiving paving material located at the front in the paving direction of the road finishing machine, and a screed for compacting paving material located at the rear in the paving direction of the road finishing machine. On a driver stand of the road finishing machine, a main control platform with primary operational controls is provided for controlling working components of the road finishing machine. The primary operational controls may be actuated by an operator located on the road finishing machine. An operation unit with a plurality of secondary operational controls is provided laterally at the chassis or the material bunker.

Abstract: A method for determining a configuration of a paving screed out of several possible configurations, whereby the paving screed is fastened on a machine frame of a tractor of a road paver. The method includes detecting a mass of the paving screed by a weighing system and determining the configuration of the paving screed on the basis of the detected mass of the paving screed. A road paver includes a tractor with a material hopper and a machine frame, wherein a paving screed is fastened on the machine frame. The road paver includes a weighing system that is configured to detect a mass of the paving screed.

Abstract: The invention relates to a construction machine such as a road paver with an electric generator. The construction machine comprises a hydraulic oil system for hydraulic functions that also cools the generator.

Abstract: The disclosure relates to a conveyor device that comprises a conveyor belt with a conveying strand for conveying bulk material and a return strand. The conveying strand has a conveying surface on which a material flow is running whose feed rate is given by the product of a linear velocity of the conveying strand and a conveying cross-section of the material flow. The disclosure is characterized by a variable flow limiting device that is movable between a first position and a second position. The conveying cross-section downstream of the flow limiting device is smaller in the second position than in the first position.

Abstract: A track-supporting roller assembly, according to the disclosure, for supporting a crawler track of a crawler chassis includes a bearing unit and a track-supporting roller rotatably coupled to the bearing unit. The track-supporting roller includes at least one supporting body made of plastic. The supporting body serves as a damper and prevents a metal-on-metal contact between track chain links of the crawler track and the track-supporting roller. The track-supporting roller assembly according to the disclosure ensures a reduced noise development in the crawler chassis. At the same time, it is possible to also reduce the wear of the track-supporting rollers to a considerable extent.

Abstract: A paving screed to be employed on a road finisher comprises a base screed, the operating width of which may be modified by protractable extending units and/or separate removable bolt-on extensions. The paving screed also includes a plurality of side plates, each being mountable on an outer end of the base screed or an extending unit or a bolt-on extension and which delimit the operating width. At least one reference element for determining the operating width is provided on one of the side plates, and that the at least one reference element is detectable by one or more sensor units when the side plates are each mounted on the outer ends of the base screed, an extending unit or a bolt-on extension.

Abstract: A construction machine according to the disclosure comprises a primary drive configured to generate waste heat and one or a plurality of machine components, the machine components being arranged in the area of the primary drive of the construction machine. At least one of the machine components is arranged in a housing including at least one flow passage through which ambient air is sucked using underpressure or which can have ambient air supplied thereto using overpressure so that an air current is created.

Abstract: A construction machine includes a sensor unit having a measurement range. The sensor unit is variable in its orientation relative to the construction machine, whereby position or orientation of the measurement range relative to the construction machine is also variable. The sensor unit is configured for detecting position of an external reference. The construction machine further includes a setup assistance system including a display configured to indicate to an operator while the sensor unit is oriented relative to the reference in which direction the sensor unit has to be moved in order for the reference to be located in the measurement range. The sensor unit is configured to detect a position of the reference relative to the sensor unit in at least two dimensions, and the display is configured to display the position of the reference relative to the measurement range for the at least two detected dimensions simultaneously.

Abstract: A road paver according to the disclosure comprises a material hopper for receiving paving material and a screed for compacting paving material that is supported with towing arms on a chassis of the road paver. In addition, a radar sensor unit is provided that is configured to measure the distances between the radar sensor unit and at least two ground positions. A control unit of the road paver is configured to adjust a position of the screed relative to the chassis based on the distances measured. In addition, a corresponding method for controlling a road paver is specified.

Abstract: A method is provided for determining a configuration of a paving screed out of several possible configurations, whereby the paving screed is fastened on a machine frame of a tractor of a road paver. The method according to the disclosure is characterized by detecting a mass of the paving screed by a weighing system and determining the configuration of the paving screed on the basis of the detected mass of the paving screed. A road paver is also provided, and the road paver comprises a tractor with a material hopper and a machine frame, wherein a paving screed is fastened on the machine frame. The road paver according to the disclosure is characterized by a weighing system that is configured to detect a mass of the paving screed.