COMBINED UNIT Russian patent published in 1997 - IPC

FIELD: agricultural engineering, in particular, combined soil tillage, onion seeding and herbicide application equipment. SUBSTANCE: unit has frame, rotary drum with protective housing, seeding and fertilizer spreading apparatuses and group of covering shares. Seeding apparatus has endless transportation chain with grips. Side of chain adjacent to onion seed hopper is inclined at an angle of 30 deg in the direction of advancement of combined unit and opposite side is directed downward to soil surface. Seeding apparatus is rigidly mounted on frame and its lower seeding part is positioned below housing of rotary drum and provided with two disks having ground-engaging members arranged along perimeter of disks. Chain drive sprocket is mounted between disks on common shaft for transportation of seeding material from hopper to soil surface. Shield-soil baffle is fixed to front side of lower seeding part along its width. Pipeline with herbicide dispenser is mounted on shield-soil baffle. Herbicide dispenser is made in the form of pipe fixed above shield base and provided with openings. Shield protects working members of seeding apparatus and openings of herbicide dispenser from plugging with soil. Fan with airduct is positioned in front of seeding apparatus arranged above rotary drum housing. Air flow is passed in direction opposite to chain advancement direction. Lower cutting of shield is positioned at the level of seeding apparatus grips, when grips are in vertical position relative to soil surface, and disks of chain drive are aligned with cutter axis in its working position. EFFECT: increased efficiency and enhanced reliability in operation. 2 cl, 1 dwg