SHANK FOR SUBSURFACE BROADCAST SOWING Russian patent published in 2008 - IPC A01C7/20 

FIELD: agricultural engineering.

SUBSTANCE: shank has broadcast disk, drive mechanism for moving said disk, knife, seed guide, and hollow tine. Broadcast disk is positioned under knife and fixed on lower end of vertical roll placed within hollow tine on slide bearings and has driven pulley at its upper end. Driven pulley is driven for movement by means of belt from drive pulley attached to roller. Roller has rim made from friction material and is adapted for coming into contact with side surface of supporting-driving wheel formed as disk. Disk is equipped with restricting ring and ground-engaging devices. Roll is freely positioned on pin whose lower end is fixed by means of pipe length having rectangular section on two parallel plated carriers. Hollow tine and tubular seed guide are placed within rear part between carriers so that their height may be adjusted. Front parts of carriers rest upon cylindrical casing. Roller is positioned within casing on ball bearings. Hub of supporting-driving disk is freely put on cantilevered end of roller, on key. Spiral spring is placed between hub flange and washer positioned on threaded end of roller.

EFFECT: improved uniformity in distribution of seeds over wide strip, simplified construction and enhanced reliability in operation of shank.

2 dwg