Hydraulic drive arrangement to drive a reciprocating cutter bar

A drive arrangement for the reciprocating drive of a cutter bar, comprising:

• a hydraulic gear motor with a housing and two gearwheels located in the housing, in which the gearwheels intermesh and are set into rotation in opposite directions by a hydraulic medium running along outsides of the gearwheels from an inlet to an outlet of the housing, while only a limited or no amount of the hydraulic medium flows through an area where the gearwheels intermesh, such that one of the gearwheels is set in motion around a first axis by the hydraulic medium, and
• an eccentric drive connected to the gear motor to be driven thereby, the eccentric drive comprising an eccentric element that is rotatably driven by one of the gearwheels around a second axis parallel to the first axis and a drive element connected to the eccentric element, which is, or can be, drivingly connected to the cutter bar;
• wherein one of the gearwheels is a first gearwheel, the eccentric drive is a first eccentric drive, the eccentric element is a first eccentric element, and the cutter bar is a first cutter bar, the gear motor further comprises a second gearwheel, which is the other one of the gearwheels, located within the housing, the second gearwheel is set in motion around a third axis by the hydraulic medium, further comprising a second eccentric drive connected to the gear motor to be driven thereby, wherein the second eccentric drive comprises a second eccentric element rotatably driven by the second gearwheel around a fourth axis parallel to the third axis and comprising a second drive element connected to the second eccentric element, which is, or can be, drivingly connected to a second cutter bar.