| 摘要 |
Described is a pneumatic system for distributing seeds, which comprises a distribution and selection case (3) attached to a pneumatic turbine (1) by a hose (2), the turbine being actuated by the strength joint of a tractor, and including a main body (4) that receives a perforated distribution disc (5) and a selection plate (6), the body being closed by a lid (7). Said main body simultaneously comprises a gear (9) actuated by the transmission system of the machine and fixed to an axis (11) that rotates over bearings (12) coupled to a bearing housing (13). The housing comprises an elastic shaft (14) mounted thereonto for generating the traction of the distribution disc (5) that rotates over a plastic ring (15), the ring being attached by the lid (16); the housing also comprises a positioning and supporting element (17). Seeds are sucked by a suction action performed by the turbine (1) and subsequently led by the distribution disc (5) to an area where the suction action is interrupted; t hen an ejector spout (19) releases the seeds which are introduced into a descending duct (20) for placing them into an open soil furrow at a regular and accurate distance.
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