The claimed utility model relates to agricultural machinery, particularly to a disc implements intended for the surface treatment of soil. The technical result - reduction of energy consumption for tillage and improving the quality of three-row disk harrow.The technical result is achieved in that the three-row disc harrow, comprising a frame with crossbeams, by means of which individual struts in three rows arranged spherical discs, wherein the first row are installed on left- and pravooborachivayuschie disc working elements disposed relative to the longitudinal axis of the mirror, vrazval and third row discs concavity opposite the concavity of the discs of the second row, the nearest to the longitudinal axis of the wheels of the second and third rows of concavities directed towards this axis, according to Utility Model wheels in each row are set the working surface at an angle of attack to increase from the first to the third row, namely: α 1 <α 2 <α 3, the harrow comprises Attack angle adjustment drive device, with the possibility of increasing the smooth incremental angle of attack. In this step adjusting the angle of attack is equal to two degrees. Discs of the first row are installed working surface at an angle of attack α 1 = 10-12 ° to the direction of motion, the second row of wheels mounted working surface at an angle of attack α 2 14-16 ° to the direction of movement, the third row of wheels mounted working surface at an angle of attack α 3 16-18 ° to the direction of movement.The apparatus adjust the angle of attack of disks mounted on each row of disks, and comprises an adjusting bar, connected with the adjusting unit, and a scale mounted on the bracket frame harrow. The adjusting assembly comprises two rod multidirectional threaded sleeve connected with two threaded holes for the first and second rod, respectively, with the possibility of sliding to the clutch center or moving apart rods. 1 bp ZP 4 2 Fig.Заявляемая полезная модель относится к сельскохоз
