DRILL Russian patent published in 1999 - IPC

FIELD: agriculture, in particular, cereal and leguminous crop drilling equipment. SUBSTANCE: drill has seeding device, shanks and rollers, frame formed as closed pentahedron with one acute angle, two right angles and two obtuse angles. Rectangular base of pentahedron is provided with protrusions. Tie-rod tine is mounted on protrusions and may be moved by carrier levers for two-coordinate positioning. Levers are movable in axial plane and in angular paths in third coordinate due to flexure and force occurring in the process of kinematic cooperation between frame, tie-rod tine and shaft of rotary wheel unit with odd set of wheels providing overlapping of track of rotary driven wheel. Rollers are interconnected on shaft by rectilinear or curvilinear key. Shank blade is mounted on tine stop projection for coordination in axial and tangential directions and fixed relative to depression in tine end by washer. Main rear angle "α" varies from 28 to 0 deg in radial part, in part adjacent to apex "β" of shank blade and further reduces to 0 on main cutting edges. Roller surfaces are provided with Z-shaped rounded projections. Z-shaped projection pitch on rollers is coordinated with that between axes of radial channels for discrete delivery of seeds, dry and liquid fertilizers. Seed dispenser is mounted on shank by means of threaded member mounted in opening joined with tangential-axial openings for feeding lubricant to threaded connection prior to mounting shank blade. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 6 dwg