WORKING ELEMENT OF TOOL FOR SUBSURFACE TILLAGE Russian patent published in 2013 - IPC A01B35/18 A01B49/02 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agricultural machinery industry, in particular, to working elements of tools for subsurface tillage. The working element comprises a rack and a flat hoe mounted on it. The working surface of the hoe is made up with double convex upwards of curvature: negative - in the undercut part and positive - in loosening part. The working surface in the area of the middle of the hoe wings is provided radially with toothed flat discs. The discs are mounted parallel to the longitudinal axis with the ability to vary the height of his position. The hoe cutting edge has a contour in the form of a parabola. The vertex of the parabola faces the hoe tip, and the branches - to the ends of the hoe wings. The cutting edge of each hoe wing on the contour is made toothed. The front edge of each tooth has the shape of half a parabola. A branch of the parabola faces the end of the hoe wing, and the vertex - to the hoe tip, and its bulge in the direction of movement and is arranged to overlap in the transverse direction of the front edge of the tooth located in front. The rear edge of each tooth is made rectilinear and is located perpendicular to the tangent corresponding to the point of the contour. The corner angle of each hoe wing from the tip to the point of intersection of straight lines, one of which is the tangent to the contour and the other passes through the starting point of next tooth perpendicular to the tangent, is formed increasing in shape of half a parabola which convexity faces the longitudinal axis of the hoe, the vertex - its tip, and the branch - the end of the hoe wing.

EFFECT: improved design.

5 dwg