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

FIELD: agricultural engineering, in particular, single seed seeding equipment.

SUBSTANCE: seeding unit has housing with seed chamber and vacuum chamber, and seeding disk disposed therebetween. Seeding disk has circumferential suction apertures provided in its end surface, and plated baffle for removal of excessive seeds. Apexes of saw-shaped protrusions of baffle shank are arranged along arc of a circle having radius smaller than radius of circle along which suction apertures are provided in seeding disk. Baffle has guider equipped with through longitudinal rectangular slot extending along axis of symmetry, and pin joined at right angle to end surface of guider, said axis of symmetry extending through center of seeding disk. Mechanism for adjusting position of shank protrusions relative to suction apertures is provided with cylindrical washer equipped at its end surface with groove made in the form of Archimedes' spiral. Groove is engaged with guider pin. Fastening pin is passed via through opening provided centrally of cylindrical washer. One end of fastening pin is rigidly connected to housing of seeding unit, and other end is connected through threaded connection with pressure handle for retaining of baffle relative to housing of seeding unit. Fastening pin is passing via through longitudinal slot. Guider is disposed in recess formed in seeding unit housing, said recess extending radially of seeding disk center.

EFFECT: improved quality of single-seed sowing owing to effective removal of excessive seeds.

4 dwg