SEED DRILL Russian patent published in 2012 - IPC A01C7/08 A01C7/20 

FIELD: agriculture.

SUBSTANCE: seed drill has a box for seeds mounted on the bearing frame, a coulter beam with multiple seeding openers, which number corresponds to the amount of sown furrows. Each opener is connected to the coulter beam through the four-link hinge. The base of four-link hinge is attached to the coulter beam and has the hinges at its ends for rods passing counter-movement of the drill. The latter are through the hinge connected to the leash, closing the four-link hinge and directing the openers. The four-link hinge is under the springy influence, causing pressure of the opener on the soil. Each hinge has a bearing housing, which cross section is different from the round. The housing contains at least two symmetrically placed pockets to accommodate axis-parallel elastic elements, and the profiled insert placed it in. The insert is made with the possibility of interaction with its outer surfaces with a corresponding elastic element.

EFFECT: use of the invention will improve the lateral stability of the openers and reduce their incision into the soil before the crackdown on the rocks or clods of soil.

24 cl, 21 dwg