COIL SEEDING APPARATUS FOR SOWING SMALL-SEEDED CROPS Russian patent published in 2012 - IPC A01C7/12 

FIELD: agriculture.

SUBSTANCE: seeding apparatus comprises a body, a coupling installed on a driving shaft, a channelled coil and an orifice of fine-tooth profile, installed between the channelled coil and the coupling. The orifice profile is formed by cells, every of which has a front flat face inclined at the angle to the plane of the subsequent rear face and a rear face arranged in the form of a groove with a spherical surface in the form of a ball with a radius equal to Ѕ of the seed diameter. Teeth of the orifice with fine-tooth profile are installed into a splint of a rectangular cross section formed by two sides and a base. The splint covers by its base and sides the orifice teeth along its circumference by the angle of 180° relative to its centre. At the same time the start of the splint is arranged above the horizontal axis of the orifice and is deviated from its vertical axis by the angle of 45° along with its rotation. At the same time the end of the splint is arranged below the horizontal axis of the orifice and is deviated from its vertical axis by the angle of 45° along with its rotation. The start and the end of the splint match with the plane stretching via the horizontal axis of the orifice. At the end of the splint, along its base edge, a shield is fixed. At the same time the shield is directed downwards from the splint base along the plane stretching via the horizontal axis of the orifice and matching with the start and end of the splint. At the start of the splint, along its base edge, a brush is installed. Free ends of the brush bristles are directed towards the orifice centre and lie in the plane stretching via the horizontal axis of the orifice and matching with the start and the end of the splint. The size of brush bristles equals 1/3 of tooth height. The splint is installed fixedly relative to the orifice and is rigidly fixed to the body of the seeding apparatus with the help of screws.

EFFECT: invention makes it possible to increase evenness of distribution of small-seeded crop seeds along a seeding area, to reduce damage to seeds, to strictly comply with the set norm of seeding, to reduce consumption of seeds and wear of orifice teeth.

3 cl, 5 dwg