Zf Friedrichshafen Ag

Benedikt Reick

Raphael Himmelsbach

Philipp Rechenbach

Stefan Beck

Johannes Kaltenbach

Michael Wechs

Jens Moraw

Gerhard Niederbrucker

Viktor Warth

Marton Kurucz

The present disclosure relates to a powertrain for a work machine, such as an agricultural work machine. The powertrain includes a first electric motor with a first drive shaft that can be driven by the first electric motor, and a second electric motor with a second drive shaft that can be driven by the second electric motor. The powertrain has a first coupling gearwheel arranged on the first drive shaft and a second coupling gearwheel arranged on the second drive shaft, where the first coupling gearwheel engages with the second coupling gearwheel. Also disclosed is a corresponding work machine incorporating the powertrain.

Powertrain for a work machine, and work machine

A continuously variable power-split transmission with at least four driving ranges, within which the gear ratio of the power-split transmission can be continuously varied by a variator. A first planetary gearset with a plurality of shafts can be connected via shifting elements with another planetary gearset that also has a plurality of shafts and can be connected with a transmission output shaft. The first planetary gearset comprises four shafts and can be connected, via a first shaft, with a transmission input shaft and a first shaft of the variator. Furthermore, the first planetary gearset is connected, via a second shaft, to a second shaft of the variator, and the first planetary gearset is coupled, via a third shaft, to halves of two shifting elements and, via a fourth shaft, the first planetary gearset is coupled to a shifting element half of a further shifting element.

Power split continuously variable transmission with at least four travel ranges

A continuously variable power-split transmission having a planetary gear mechanism arrangement. The planetary gear mechanism arrangement has three planetary gear sets, an input shaft and three output shafts. Furthermore, the transmission has a change-speed gearbox connected to the output shafts, a reverse gear mechanism and a variator. Each of the three planetary gear sets is assigned a respective output shaft. The input shaft is operatively connected in each of the three planetary gear sets via a respective gearwheel pairing to a respective output shaft. The transmission can be shifted by the change-speed gearbox and the reverse gear mechanism into at least eight driving ranges. The variator varies a transmission ratio of the transmission within the driving ranges in a continuously variable manner. The variator is continuously operatively connected to a single one of the three planetary gear sets.

Continuously variable power-split transmission

A power-split transmission comprises an electric variator () and an electric variator () which can be connected, by way of a clutch (), for forward driving, and a clutch (), for reverse driving, to the drive output shaft () in such manner that the drive output shaft () can be purely electrically driven even when the input shaft () is static.

Power-split transmission

A power-split drive train having a main drive, three output shafts (Ab, Ab, Ab) and a continuously variable powersplit transmission with three additional drive units. The transmission enables rotational speed variability at the shafts (Ab, Ab, Ab). Furthermore, each drive unit () has a respective energy converter () which are all electrically connected. Drive unit () has planetary gearset () that is connected, via a first shaft (W), to the main drive. Shaft (Ab) is connected, via a second shaft (W), to gearset () and energy converter () is connected, via a third shaft (W), to gearset (). The drive unit () is at least indirectly connected to drive unit () which is connected by a fifth shaft (W) to shaft (Ab). Drive unit () is at least indirectly connected to drive unit () which is connected by a seventh shaft (W) to shaft (Ab).

Power-split driveline for a work machine

A power-split drive train for a working machine having a main drive element, drive output shafts (Ab, Ab, Ab), and a continuous power-split transmission with three drive units (). The transmission enables all three output shafts to be operated at the same time with rotational speed variability. A first drive unit () has two energy converters while second and third drive units () each comprise one energy converter. All four energy converters are functionally connected to an electric line. The first unit () is connected, via a first shaft, to the main drive element and, via a second shaft, to output shaft (Ab). The first unit () is connected to drive unit () which is connected, via a third shaft, to output shaft (Ab). The first drive unit () is connected to drive unit () which is connected, via a fourth shaft, to output shaft (Ab).

Growing community of inventors

Friedrichshafen, Germany

Benedikt Reick