DRILLING MECHANISM Russian patent published in 1997 - IPC

FIELD: agricultural engineering; drills. SUBSTANCE: drilling mechanism has hopper 2 secured on frame 1 with drilling device 4 connected to lower portion of hopper. Central part of bottom of drilling device is made in form of cone and peripheral part is provided with holes. Device has seed distributor placed above bottom under which seed tubes 21 are installed. Housing of drilling device 4 of cylindrical shape is connected to hopper 2 by means of flexible ties 3. Several elongated holes are made above peripheral part of bottom and in ring. Ring is pressed to peripheral part of bottom by means of spring-loaded screw connections placed in some longitudinal holes, while actuating member of adjuster are placed in other longitudinal holes. Seed drilling holes are also made elongated. Device for turning the ring is mounted under bottom. EFFECT: enhanced reliability of operation. 2 cl, 5 dwg