Linde Aktiengesellschaft

Linde Hydraulics Gmbh & Co. Kg

Ulrich Schwarz

Bernward Welschof

A hydromechanical transmission has a hydraulic pump-driven hydraulic motor of a hydrostatic continuously variable transmission and a mechanical multi-step variable speed transmission connected to a drive shaft of the hydraulic motor, which can be shifted into operation by a gear shifting device. In order to adapt the hydromechanical transmission with as compact as possible a design to diverse installation cases with little effort, the gear shifting device is arranged directly adjacent to the hydraulic motor and is consolidated with the latter into a preassembled constructional unit.

Hydromechanical transmission with a hydraulic motor and a mechanical multi-step variable speed transmission

A drive wheel system for industrial trucks can be rotated around a vertical axis and has a hub carrier, a hub that is mounted on it and carries a driven wheel, an electric travel motor and preferably a downstream travel gearbox. The invention teaches that the travel motor is realized in the form of a disc armature motor. The travel motor, the hub with the wheel and the travel gearbox, if present&mdash;viewed in section along the axis of rotation of the wheel&mdash;are located inside an envelope circle, the diameter of which approximately equals the outside diameter of the wheel. A drive shaft of the travel motor is non-rotationally connected with a sun wheel of a first stage of the travel gearbox realized in the form of a planetary gear train. A web of a second stage of the travel gearbox is non-rotationally connected with the hub carrier and a ring gear of the second stage of the travel gearbox is connected with the hub. The wheel is located axially between the travel motor and the travel gearbox. The hub is mounted by means of at least two tapered roller bearings that are oriented at least approximately symmetrically to the vertical axis. A braking device is located radially inside the mounting of the hub and axially between the travel motor and the travel gearbox.

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Aschaffenburg, Germany

Ulrich Schwarz