| 摘要 |
1. Seed drill (10), particularly a single-granule seed drill with, located in a casing (50), a discharge device (24) to which is connected a discharge tube (26), having an upper end (156) and a lower end (158) and an inner surface connecting these two ends (156, 158) and forming a frontal wall (164), said inner surface, at least in its lower region facing the earth relative to the direction of travel of the seed drill, extending in a rearward curved manner, in such a way that its curvature increases progressively in the direction of the soil, characterised in that the curvature in a first portion (160) connecting with the upper end (156) follows a logarithmic curve, and in a second portion (162), which connects with the first portion (160) and leads to the lower end (158), follows an exponential curve. |
