COMBINED SOD DRILL Russian patent published in 2004 - IPC

FIELD: agricultural production, in particular, drills and combined sod drill units. SUBSTANCE: combined sod drill has frame with carrier-drive wheel, rotavating section closed with housing and equipped with tillage knives, sod tillage depth regulating mechanism, fertilizer and seed boxes with seeding units and drive thereof, fertilizer and seed guides, and covering rollers. Drive has multiple-speed friction regulator, which is composed of conical driving friction drum and at least two driven friction rollers mounted for axial displacement on driven shafts, whose pins are arranged in parallel with cone generatrix. Driving drum is kinematically connected with carrier-drive wheel and each driven shaft is connected with one type of seeding units. Reliable contact between driving drum and rollers is provided by mounting of driving conical friction drum on drive shaft for axial displacement thereon and owing to use of flexible member. Seeding rate of material (seed and fertilizer) is regulated by difference of diameters of driven friction rollers and displacement thereof over driven shafts with respect to base of driving conical friction drum. EFFECT: reduced metal usage, simplified construction and independent adjustment of seeding rate. 3 cl, 2 dwg