Drive system for driving a chopper and feeder device of a harvesting machine

A drive system for driving a chopper and feeder device of a harvesting machine, comprising:

• a chopper and feeder device comprising a feeder device and a chopper device;
• a drive train for driving the feeder device and the chopper device, wherein the drive train is connected by a coupling device with a drive motor;
• a hydrostatic transmission for driving the feeder device, wherein the hydrostatic transmission comprises an electrically actuated variable displacement pump driven by the drive train and a hydraulic motor connected in a closed circuit to the pump, wherein the hydraulic motor is in a driving connection with the feeder device, and wherein a fast stop function is provided such that when a foreign object is detected, the chopper and feeder device is cut off;
• an electronic control system in communication with a foreign object detector;
• and
• a pressure protection device associated with the hydrostatic transmission,
• wherein for the fast stop function of the feeder device, the variable displacement pump is set to a displacement of zero by the electronic control system when a foreign object is detected by the foreign object detector, and the feeder device is braked by the pressure protection device of the closed circuit, and
• wherein for the fast stop function of the chopper device, when the variable displacement pump is set to a displacement of zero, the hydraulic motor is cut off by the electronic control system, the drive train is isolated from the drive motor by uncoupling the coupling device via the electronic control system, the variable displacement pump is set to the maximum displacement volume by the electronic control system, and the chopper device is braked by the pressure protection device of the closed circuit.