Wirtgen Gmbh

Tobias Stinner

Christian Berning

Cyrus Barimani

Hardy Wilhelmi

Günter Hähn

Andreas Salz

Andreas Vogt

Axel Mahlberg

Burkhard Frank

Sebastian Bötzius

Sebastian Drumm

Philipp Prassel

Viktor Stremel

Rolf David Pancho Yanza

An earth working machine (), encompassing a drive motor () and a working apparatus () drivable by the drive motor () so as to move rotationally, the drive motor () being connected to the working apparatus (), for transfer of a torque, with interposition of a shiftable transmission () comprising at least two gearing stages having different torque transfer ratios,

Earth working machine having a shiftable transmission between a drive motor and a rotatable working apparatus

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

An earth working machine (), encompassing a drive motor () and a working apparatus () drivable by the drive motor () so as to move rotationally, the drive motor () being connected to the working apparatus (), for transfer of a torque, with interposition of a shiftable transmission () comprising at least two gearing stages having different torque transfer ratios, is characterized in that by means of a first gearing stage of the shiftable transmission (), an input shaft (), coupled on the input side to the drive motor (), of the shiftable transmission () is connectable in torque-transferring fashion directly to an output shaft (), coupled on the output side to the working apparatus (), of the shiftable transmission () so as to rotate together at the same rotation speed; and by means of a second gearing stage of the shiftable transmission (), the input shaft () is connectable in torque-transferring fashion, with interposition of a transmission assemblage (), to the output shaft () so as to rotate together at different rotation speeds.

In a self-propelled construction machine (), in particular road milling machine, stabilizer, recycler or surface miner, comprising a machine frame (), and at least one working device (), in particular milling drum, which is arranged in a housing () open towards the bottom that is at least partially closed on at least one side by at least one edge protector () height-adjustable relative to the machine frame (), wherein, for the purpose of height adjustment, at least one first lifting device () is provided, the first end () of which is connected to the machine frame (), and the second end () of which is connected to the height-adjustable edge protector (), it is provided for the following features to be achieved: a second lifting device () is provided, the first end () of which is connected to the machine frame (), and the second end () of which is connected to a first end () of a transmission device (), which is in turn connected, with a second end (), to the height-adjustable edge protector ().

Construction machines

A milling unit for an earth working machine including a milling drum and a milling drum housing; the milling unit comprising a closed operating-medium circuit that includes an operating-medium pump that is embodied to drive the operating medium to circulate in the operating-medium circuit; the operating-medium circuit including a heat exchanger through which operating medium flows during circulating flow of the operating medium; the heat exchanger being arranged on the milling drum housing. Provision is made that the heat exchanger is configured for flow impingement by a cooling gas separate from the operating medium; and that a cooling fan, which is embodied to drive the cooling gas for flow impingement onto the heat exchanger, is arranged on the milling drum housing.

Intentionally replaceable earth working machine milling unit having a cooling fan for cooling a closed operating-medium circuit

The present invention relates to a self-propelled earth working machine () comprising

Earth working machine having a climbing device that is variable in length and has a plurality of different climb-ready operating positions

In a self-propelled construction machine (), in particular road milling machine, comprising a machine frame (), at least three travelling devices (), wherein at least one of the three travelling devices () is realized as a pivotable travelling device () so that said travelling device () is pivotable about at least one vertical pivoting axis in relation to the machine frame () between a first pivoted-in and at least one second pivoted-out position, at least one working device (), in particular a milling drum, for working the ground pavement (), at least one hydraulic drive system () for driving at least two travelling devices (), wherein at least one of the at least two driven travelling devices is the pivotable travelling device (), wherein the hydraulic drive system () comprises at least one hydraulic pump (), it is provided for the following features to be achieved: the hydraulic drive system () comprises one each hydraulic variable displacement motor () for driving the driven travelling devices () with the exception of the at least one pivotable travelling device (), wherein the hydraulic drive system () comprises a hydraulic fixed displacement motor () for driving the at least one pivotable travelling device ().

Self-propelled construction machine

An earth working machine (), for example a road milling machine (), recycler, stabilizer, or surface miner, having a propelling unit () and a machine frame () carried by the propelling unit (), comprises a working apparatus () for earth working. Provision is made that the earth working machine () comprises, on an underside () of the machine frame () facing toward the supporting substrate of the machine (), a maintenance door () that is movable between a raised operational readiness position and a lowered maintenance position and that comprises, on its inner side () that faces away from the supporting substrate (U) in the operational readiness position, at least one functional configuration () that assists a maintenance operation.

Earth working machine having a maintenance door offering storage space

A road milling machine includes a rear wheel or track mounted on a pivot arm such that the wheel or track is movable between a first outer end position projecting laterally relative to the machine frame, and a second inner end position which permits milling close to an edge. A travel drive of the rear wheel or track provides a driving force to move the wheel or track between the end positions.

Growing community of inventors

Weyerbusch, Germany

Tobias Stinner