Drive system for hydraulically driven working mechanisms of a working machine
AssigneeClaas Selbsfahrende Erntemaschinen GmbH
InventorsHeinrich Dueckinghaus, Heinrich Schneider, Dirk Schlichting
Life of this patent
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Abstract
A drive system for hydraulically driven working mechanisms of a working machine includes an axial piston pump, the pump capacity and flow direction of which is varied by changing the pivot angle of the axial piston pump. The drive system includes a hydraulic motor connected via a line to the axial piston pump and drivably connected to the working mechanisms, a control unit operated to set the pump capacity of the axial piston pump to zero and a control valve arrangement that is actuated by the control unit to actuate a limiting device such that the pivot angle of the axial piston pump can be mechanically set to zero degrees (0°).
Claims15
A drive system for hydraulically driven working mechanisms of a working machine, comprising:
- an axial piston pump having a pump capacity and flow direction that is varied by changing a pivot angle of the axial piston pump;
- a hydraulic motor connected via a line to the axial piston pump and drivably connected to the driven working mechanisms;
- a control unit that is operated to set the pump capacity of the axial piston pump to zero via actuation of a solenoid valve;
- and
- an actuator system that is actuated by the control unit to actuate a limiting device to enable mechanically setting the pivot angle of the axial piston pump to zero degrees) (0°).
A method for operating a drive system for hydraulically driven working mechanisms of a working machine, comprising axial piston pump having a pump capacity and flow direction which are varied by changing a pivot angle of the axial piston pump, a hydraulic motor connected via a line to the axial piston pump and drivably connected to the working mechanisms and a control unit operatable to set a pump capacity of the axial piston pump to zero, comprising steps of:
- detecting a presence of an operating state representative of a foreign body entering a working mechanism of the working machine or of a triggering of a reversing operation of a working mechanism;
- and
- actuating, by the control unit, an actuator system to control a limiting device to mechanically set a pivot angle of the axial piston pump, depending on the operating state that is detected.
Dependencies are inferred from the claim text.