HARROW DISK (VERSIONS)

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The structural invention relates to agriculture, mainly to boronam with rotating besprivodnymi working members, and can be used for presowing soil tillage for agricultural crops. Harrow disk version 1, has frame of cross bars, on which at equal distance from each other there are spherical working disks, forming on each bar row of disks, at that working disks of first and second rows are installed its concave surface in opposite sides and form first twin row of disks, and working disks subsequent adjacent paired rows are installed its concave surface in opposite sides relative to corresponding row of previous paired row of, at that rows of disks shifted in the cross direction relative to each other through value Δ, equal to the quotient from division of the distance (t) between working disks in one row on number of rows of (N), at that mutual lateral displacement of disks in adjacent rows depending on spatial orientation of these disks is in dependence of b < < and with, where a-value of transverse displacement discs with adjacent 3, concave surface of which are pointed to one side, ; and = (1 ÷ 1.05) δ; b-value of transverse displacement discs with adjacent 3, concave surface of which are directed outside of space between 3 ; with-value of transverse displacement working discs with adjacent 3, concave surface of which facing inside of space between 3, so, that disks 2-go , 3-go and 4-go row are displaced relative to disks 1-go row in transverse direction towards non-processed 1-m near of strip ground in sequence : 1-2-3-4. Harrow disk version 2 differs, that consists of 3-kh rows of working disks, relative transverse displacement of which in adjacent rows depending on spatial orientation of these disks is in dependence of b < < and with, disks 2-go and 3-go row are displaced relative to disks 1-go row in transverse direction towards non-processed 1-m near of strip ground in sequence : 1-2-3. Harrow disk version 3 differs, that mutual lateral displacement of disks in adjacent rows depending on spatial orientation of these disks is in dependence of b < < and with, where a = (1 ÷ 1.05) δ; at that disks rows are offset relative to disks 1-go row in transverse direction towards non-processed 1-m near of strip ground in sequence : 1-3-2-4. 3 n. u ., 2 3. u ., 13 ill.