Combine harvester

Combine harvester comprising:

• a cleaning system comprising:
• a first cleaner assembly comprising at least one reciprocatable cleaner device, and
• a second cleaner assembly comprising at least one reciprocatable cleaner device and
• a cleaning system drive assembly comprising a rotatable drive shaft and an eccentric device that comprises a circular element that is connected at a shaft connection point to the rotatable drive shaft to rotate with the rotatable drive shaft, wherein the shaft connection point is located at a distance from the center of the circular element,
• a transmission comprising
• an annular member extending around the circular element and that is pivotable around said circular element, a second arm having a first end and a second end, the first end is fixedly connected to the annular member, and the second end is in connection with the reciprocatable cleaner device of the second cleaner assembly, a first arm which has a first end and a second end, the first end is fixedly connected to the annular member,
• a first cleaner drive linkage having a first end and a second end, which first end of the first cleaner drive linkage is pivotably connected to the second end of the first arm and the second end of the first cleaner drive linkage is connected to the reciprocatable cleaner device of the first cleaner assembly,
• wherein the reciprocatable cleaner device of the second cleaner assembly and the reciprocatable cleaner device of the first cleaner assembly are reciprocatingly drivable by the cleaning system drive assembly in generally opposite directions.