ARRANGEMENT OF A SEED METERING DEVICE ON AN AGRICULTURAL MACHINE

摘要

Agricultural machine embracing at least one drilling unit (2) in turn comprising a support device (21) as well as a seed metering device (8) to distribute seeds to a drill furrow (9a) in the ground (9) across which the agricultural machine (1) moves, the drilling unit (2) being movably connected with a structural member (3) embraced by the agricultural machine and the seed metering device (8) being fixedly connected with the support device (21) of the drilling unit (2), the seed metering device (8) embracing a seed metering element (803) that, by means of a driving device, is arranged to transport seeds to a seed metering line (812), where the seed metering device (8) comprises a chamber (882) for seeds (92), which chamber (882) is arranged to be supplied with a positive pressure from a pressure-creating member (880) embraced by the agricultural machine, where the seed metering element (803) constitutes a wall limiting the chamber (882) and in which holes (804) or recesses are arranged, which holes/recesses (804) connect the chamber (882) with the surroundings, with the purpose of, by the pressure difference developed hereby, attaching and transporting seeds at said holes/recesses (804) of the seed metering element (803), wherein the seed metering line (812) has an inlet (814) in the chamber (882), with the purpose of, by said positive pressure in the chamber (882), creating an air flow for the transportation of the seeds from the chamber (882) through the seed metering line (812) to the drill furrow (9a).