Height adjusting and damping device for a rotary swather

The device (2) has at least two rotary devices (6,7) with rake prongs driven about vertical axes in a controlled manner that are supported on the ground when in the working position by sensing and supporting wheels and joined to a bearer structure by cantilevers. The running gear (8) is supported relative to the frame construction (15) by at least two variable length pneumatic springs (14) subjected to variable pressure.