Pneumatic single grain seed drill - has separate feed device and eccentrically pivoting suction hole device and distributor wheel with scoops

摘要

The separate feed-device consists of a pivot-mounted disc (1) with a concentric distributor-wheel (3). The disc has several large holes (5) for the seeds to pass through from the bottom (6) of a hopper (7). A number of suction-holes (8) are arranged around the circumference of the disc (1) which has, radially to the suction-holes a ring of pins (9). The distributor wheel (3) has a ring of scoops (10) forming distributor-compartments (11) between them, around its circumference. The disc (1) is driven by a cogged wheel (13) by its chaft (12) pivot-mounted in ball-bearings (14). The distributor-wheel is pivot-mounted in a ball-bearing (15). A suction-pipe (17) connects a duct (16) to a vacuum. The duct (16) is positioned below the ring of suction-holes and covered by a housing (18) in which is a suction-pipe.