COMBINED DRILL Russian patent published in 2015 - IPC A01C7/06 A01B49/06 

FIELD: agriculture.

SUBSTANCE: drill comprises a hitch tongue 1, a position adjustment mechanism 2 of the longitudinal frame 3 with a hydraulic cylinder 4, an adjusting screw 5, a lever 6, a rod 7, and transport wheels 8. The drill has also a tillage annular harrow 9, a fertiliser hopper 12 with fertiliser tubes 13, a hopper 14 for seeds with seed tubes 15, a drive wheel 17 of sowing and fertiliser 18 units, sowing sections 19. Each of the sowing sections comprises a fertiliser opener 21 with the fertiliser distributor 22, a compacting roller 23 with the seed distributor 24, a coverer 25 and a levelling roller 26, attached to the frame through the parallelogram mechanism 20. On the outer diameter of the compacting roller 23 in the middle an annular thickening is made, which cross section in a plane passing through the generator of the outer diameter and the axis of the compacting roller, is made in the form of an isosceles trapezium. The surface of the projecting part of the annular thickening is made wavy in the form of convex arcs equal in length, intersecting each other. The distance from the surface of the projecting part of the annular thickening to the outer diameter of the compacting roller 23 is equal to the depth of seed embedding into the soil.

EFFECT: invention enables to distribute evenly the seeds on the bottom of the furrow, to provide seed embedding in planting for the same depth, to reduce the flow of water on the bottom of the furrow.

6 cl, 7 dwg