A system and a method for controlling tire air pressure of a compactor having a plurality of tires. A weight distribution of the compactor is determined according to a per-tire basis. Target air pressures for each of the tires are determined in order to achieve a consistent compaction surface contact pressure across all of the tires or a set of the tires. Air pressure of the tires is controlled to achieve the target air pressures to make the compaction surface contact pressure consistent across all of the tires or the set of the tires.

The invention relates to an earth working machine (10), in particular a road milling machine, a stabilizer, or the like, having a milling drum (30) that is mounted rotatably on a machine frame (11) and is populated or populatable on its outer circumference with working tools (31); the working tools (31) being provided so as to come into contact, during working operation, with the ground that is to be worked in order to remove it; a drive unit (20) being provided which drives the milling drum (30) by means of a drive motor (21); an input drive shaft (33) that is couplable to the drive motor (21) being attached to the milling drum (30); and a ballast element, constituting a kinetic mass (57), being provided in order to increase the kinetic energy of the milling drum (30). In order to allow an earth working machine of this kind to be adapted in simple fashion to different milling applications, provision is made according to the present invention that the kinetic mass (57) is couplable to or decouplable from the rotatable milling drum (30), or a rotational member indirectly or directly coupled to the milling drum (30), via a shiftable coupling (55).

A ground compaction roller, in particular a tandem roller or a single-drum roller, having a machine frame, a drive unit, at least one roller drum mounted on the machine frame for rotation about a rotation axis, an exciter device arranged at least partially in the roller drum, and a sensor device for measuring the compaction of a ground achieved by a passage of the ground compaction roller, said sensor device being arranged on the roller drum in the region of the rotation axis and rotating together with the roller drum during operation of the ground compaction roller. The invention also relates to a method for ascertaining the ground stiffness during ground compaction with a ground compaction roller, in particular a tandem roller or a single-drum roller, comprising the steps of: measuring the acceleration directly at a roller drum which rotates during operation, ascertaining the ground stiffness from the measured values, wirelessly transmitting the measured values and/or the ground stiffness values to a receiving device.

An earth working roller for use in an earth working machine includes a roller drum, which extends in a direction along a roller axis of rotation, surrounds a roller interior, and has a circular outer circumferential contour, wherein a substrate breaking configuration is provided on the outer circumferential surface of the roller drum. The substrate breaking configuration includes a plurality of impact bars along the roller drum in the direction of the roller drum axis of rotation, as well as a plurality of breaker bars along the roller drum in a circumferential direction.

A ground compaction roller, in particular a tandem roller or a single-drum roller, having a machine frame, a drive unit, at least one roller drum mounted on the machine frame for rotation about a rotation axis, an exciter device arranged at least partially in the roller drum, and a sensor device for measuring the compaction of a ground achieved by a passage of the ground compaction roller, said sensor device being arranged on the roller drum in the region of the rotation axis and rotating together with the roller drum during operation of the ground compaction roller. The invention also relates to a method for ascertaining the ground stiffness during ground compaction with a ground compaction roller, in particular a tandem roller or a single-drum roller, comprising the steps of: measuring the acceleration directly at a roller drum which rotates during operation, ascertaining the ground stiffness from the measured values, wirelessly transmitting the measured values and/or the ground stiffness values to a receiving device.

A drum for a roller compactor has an outer shell providing an exterior peripheral compacting surface and an interior for housing an excitation system used to vibrate the drum. The outer shell includes a non-elastic polymer with embedded reinforcing fibers.

A construction machine includes a system area rotatable about an axis of rotation with respect to a machine frame. On the rotatable system area is at least one sensor, a data transmission unit with at least one transmission antenna, and a first data transmission arrangement for transmitting data from the at least one sensor to the data transmission unit. On the machine frame is a data receiving unit with at least one receiving antenna, a data evaluation system, and a second data transmission arrangement for transmitting data from the data receiving unit to the data evaluation system. The data transmission unit has at least two transmission antennas and/or the data receiving unit has at least two receiving antennas.

A compactor roller includes a roller jacket, at least one roller disk connected to the roller jacket, and a reinforcing arrangement with a reinforcing ring connected to the roller jacket and a reinforcing structural group connected to the roller disk and the reinforcing ring, the reinforcing structural group including: (i) at least one first reinforcing plate arranged eccentrically and connected to the roller disk and to the reinforcing ring, and a second reinforcing plate connected to the roller disk and arranged substantially parallel to the at least one first reinforcing plate, the second reinforcing plate intersecting a rotary roller axis, or (ii) reinforcing struts connected to the roller disk and to the reinforcing ring and arranged around the rotary roller axis, at least one of the reinforcing struts arranged with a longitudinal strut axis which is not parallel to the rotary roller axis.

A roller tool for a ground processing roller of a ground processing machine includes a tool carrier to be fixed on an outer circumferential side of a carrier cladding of a ground processing roller, a quick-change tool holder to be detachably fixed on the tool carrier, and an exchangeable tool to be detachably fixed on the quick-change tool holder.

The invention relates to an impact compactor which includes a first part on which at least one non-round compactor drum is rotatably mounted; and a second part which is connected to, and movable relative to, the first part. The impact compactor also includes a damping arrangement which is connected between the first and second parts and which is configured to provide a damping function for the relative movement between the first and second parts. The damping arrangement includes an outer tubular member which defines a non-circular inner channel/passage; a non-circular inner shaft member which defines a first axis of rotation and which is positioned, at least partially, in the channel/passage defined by the outer tubular member; and at least one wedge formation which is wedged between the shaft member and the tubular member. The wedge formation is at least partially resiliently deformable and is configured to resist/oppose relative rotation between the shaft member and the tubular member about the first axis of rotation. One of the members is connected to the first part, while the other member is connected to the second part.