SEEDING UNIT Russian patent published in 1999 - IPC

FIELD: agricultural engineering. SUBSTANCE: seeding unit has hopper, branch pipe attached to hopper and provided with first seeding window, and shield secured above seeding window. Seeding disk is positioned under seeding window. Branch pipe is surrounded with belt having second seeding window. Radial spoke is disposed above front end of belt window in horizontal slot of branch pipe. Shield has curved slot and branch pipe has vertical slot disposed above rear end of seeding window to make continuation of curved slot in shield. Scraper formed as flexible plate is inserted into these slots and windows. Vertical protrusion on front end of scraper is supported with its rear edge by spoke. Rear end of scraper is connected by extension spring to belt bracket. Upon rotation of belt in direction opposed to that of disk, scraper is retracted along curved slot into branch pipe to increase seed dispensing dose; upon reversal, seed dispensing dose is reduced. As a result, sizes of scraper and windows working parts are increased or reduced, respectively. Such construction provides constant position of working curved slot making working part of scraper. EFFECT: increased efficiency, simplified construction and uniform feeding of seeds combined with wider range of seeding norms. 2 cl, 6 dwg