DISK HARROW Russian patent published in 2004 - IPC

FIELD: agricultural engineering.

SUBSTANCE: disk harrow has frame with longitudinal bars, immovable load-bearing beams and drop beams fixed on longitudinal bars so that setting angle of said beams may be adjusted in horizontal plane. Drop beams carry batteries of spherical smooth and slotted disks. Longitudinal bars are made from doubled pipes of square section, inner cavity of pipes being filled with ballast through closable middle and end charging hatches. Angle of attack of disks is regulated by means of helical tie-rods positioned on oppositely arranged beams. Disks are fixed in predetermined position by means of short helical tie-rods. End of immovable beam is provided with aperture, whose side walls and strip embrace end of drop beam from three sides thereof. Drop beam is furnished with brackets spaced from one another by distance equal to stroke of stem of hydraulic cylinder adapted for lifting and lowering of beam, said beam being fixed in brackets in operating and transport positions by means of bars. Working depth restrictor is made in the form of screw with platform pivotally secured on pin. Draft tongue is provided with pivotal link arranged between plates for rotating thereof relative to finger only in up and down directions. Draft tongue is made in the form of U-shaped transverse bushing and vertical plate, which are connected with one another by plank. Tines are made in the form of welded construction of box section. One of tines is mounted on beam by means of yokes for moving of tine along beam. Gussets for strengthening of tine platform are oriented toward convex surface of disk.

EFFECT: increased efficiency in stabilizing of soil surface tillage process owing to increased specific loading of working tools, continuous alteration of their angle of attack and tillage depth.