PNEUMATIC SEEDING UNIT Russian patent published in 2006 - IPC A01C7/04 

FIELD: agricultural engineering, in particular, single-seed sowing equipment.

SUBSTANCE: seeding unit has casing and seeding unit mounted within casing on horizontal shaft and equipped with suction openings. Low pressure chamber, excessive seed throwing device, and seed chamber adjoin seeding disk. Seed chamber is fixed to casing by means of pivot hinge. Chamber walls adjoin disk end for defining double-faced angle, with rib of said angle intersecting disk end at an acute angle relative thereto. Angle of inclination of surfaces defining seed chamber walls to vertical line in plane extending in parallel with end surface of seeding disk is equal to angle of inclination to vertical of line disposed at site of intersection of these surfaces in plane extending perpendicular to end surface of seeding disk. Intersection line of surfaces defining seed chamber, on end surface of seeding disk at side of seed chamber, crosses circle along which centers of suction openings are arranged. Cam bushing is mounted on horizontal shaft of seeding unit for cooperation with supporting roller which is fixed by means of bracket to seed chamber wall. Seed chamber is spring-loaded relative to casing of seeding unit.

EFFECT: improved quality of single seed sowing and provision for complete sowing of seeds from seed chamber.

3 dwg