COMBINED TILLAGE MACHINE (PLUS SCREW ROLLER HARROW)

FIELD: machine building.SUBSTANCE: invention relates to agricultural machine building. Proposed unit comprises frame with towing device. At bottom of frame by means of movable arms are mounted transport wheels. Levers of transport wheels are connected to each other. Left and right bars are installed on frame with working wheels. Bars are additionally connected with frame via suspensions and lifting levers, which by means of hydraulic cylinders are connected with levers of transport wheels. Frame lifting relative to transport wheels is limited in transport position by limiting stands with pins-retainers. Harrow sections with lifting mechanisms are located in front of left and right bars and central part of frame are made as frames, on which are movably installed axis with paired spring teeth. Horizontally arranged brackets of harrow sections are fixed directly on left and right bars and on central part of frame. Screw rollers are arranged behind left and right bars. On bars rollers are fixed on lower ends of leashes, which in bearing assemblies are mounted shafts of screw rollers. On shafts rollers are fixed by means of spokes helical strips. Lifting mechanism of harrow sections, mounted on central part of frame, is made in form of a beam at ends of which are mounted spacer rollers. Beam is mounted above front cross bar frame in end and paired guide posts with lifting limiters and thrusts ends on lifting rollers. Axes of rollers are secured on left and right propulsor bars with an offset from axis of rotation up to outer ends. On beam by means of controlled anchor chains suspended harrow sections. Horizontally arranged brackets of harrow sections are arranged at front transverse bar frame to turn upward. Bracket downward turning is limited by stops. Extreme ends of screw rollers installed on left and right bars are maximally close to extreme ends of said bars. Internal ends of rollers extend beyond transport wheels and partially overlap them. Operating wheels on left and right bars are arranged between them and their screw rollers, which are movable, are maximally close to extreme ends of bars. On central part of frame is mounted by means of longitudinal bars fixed on frame via parallelogram mechanisms and turn-screw unit rollers. Two rollers of unit are parallel to each other and are parallel to screw roller mounted on far right bar. Third screw wheel of unit is located parallel to screw roller left timber unit.EFFECT: such design will allow improve tillag