| 摘要 |
<p>A seeding machine has a common, bulk seed container that supplies a number of independent openers, each of which is provided with its own separate metering device. Each metering device is gravity-fed through a telescoping supply tube connected between the top of the metering device and the bottom of the seed container. Each metering device has a relative narrow metering wheel rotatable about a transverse horizontal axis that is provided with one or more rows of seed pockets on its outermost peripheral edge. As the wheel rotates upwardly through a pool of incoming seeds that have collected generally above the wheel in a seed chamber inside the metering device, the pockets become filled by gravity with seeds and then succesively discharged at the bottom of the downsweep side of the wheel. Spring-loaded retaining structure along the downsweep side of the wheel keeps the seeds within their respective pockets unitl the pockets reach the discharge outlet at the bottom of the meter, whereupon the seeds gravitate freely from the wheel in succession and are directed to the ground.</p> |
