Sauer-danfoss Inc.

Frank Ramm

Eckhard Skirde

Jeff Rea

Olaf Koltoff

The invention relates to a mobile machine having a traction drive and working hydraulics. The drive unit has a radial piston pump which is driven by a drive set and supplies working hydraulics. The radial piston pump is arranged on the axis of the output drive shaft of the drive set, between the drive set and a gearbox which is connected thereto via the output drive shaft. The drive set, the radial piston pump and the gearbox in this case form a compact drive unit.

Hydraulic output drive shaft generator

The invention relates to a hydraulic drive () having a main pump (), which can be adjusted in terms of delivery volume and delivery direction, and having a hydraulic motor (), which main pump () and hydraulic motor () are connected to one another in a closed circuit via pressure lines (A,B), and having a charge pump () for charging into the closed circuit and for supplying pressurized fluid to at least one controlling device (), wherein the charge pump () has a separate drive motor () whose power/rotational speed can be specified independently of the rotational speed of the drive () of the main pump (). In this way, the charge pump () can be of smaller dimensions than previously conventional, and the power balance of the hydraulic drive can be improved.

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Flintbek, Germany

Frank Ramm