COMBINED DISC-HOE OPENER Russian patent published in 2011 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: invention may be used in sowing machines to sow crops. An opener comprises a body 1 with a unit 2 of its fixation to a lead, a flat disc 3, an anchor scraper bar with an outer 5 and inner 6 sides, a seed and fertiliser guide 7, a distributor 8, guide elements, a reflecting canopy 10 and a closer. The distributor 8 is made as a socket with smooth widening along width and narrowing along height, with formation of a sowing slot 9 near the base. The seed and fertiliser guide 7 with the distributor 8 are fixed to the body 1 at the distance of at least 30 mm from the rear edge of the disc 3. The outer side 5, which touches the surface of the disc 3 with its front edge at the level close to its vertical axis, is installed at the angle of not more than 25 degrees to the longitudinal vertical plane. The inner side 6, arranged between the outer side 5, a seed and fertiliser guide 7 and a disc 3, is fixed to the body 1 at the angle, which is less than the angle of the disc 3 inclination to the direction of motion with a flat front part. The middle part of the inner side 6 is made with a smooth transition to a concave-convex surface to envelop the seed and fertiliser guide 7 with the distributor 8 at the front wall and at the side, and in the rear part - with exit to the trace of the disc 3 or to the side from it up to 40 mm, to the level of the rear edge of the outer side 5. At the same time the lower edge of the inner side 6 is equipped with a detachable single-sided flat cutting razor. The closer is made as a multilink made of a spring-loaded yoke 12 fixed hingedly to the rear part of the opener. Two plates 13 installed vertically are hingedly fixed to the ends of the yoke 12 at the angle to direction of motion that is not more than the angle of soil friction against the working surface with a gap between their ends close to the distance between rear edges of the outer 5 and inner 6 sides.

EFFECT: invention makes it possible to provide for widening of seeds sowing strip, to increase quality of sowing at normal and high moisture of soil and even closing of seeds with soil.

2 cl, 2 dwg