초록 ▼

A combine harvester, having threshing and separating means for threshing and separating crop material and a cleaning apparatus disposed to receive threshed and separated grain from said treshing and separating means and being operable to clean unwanted residue from the threshed and separated grain i

A combine harvester, having threshing and separating means for threshing and separating crop material and a cleaning apparatus disposed to receive threshed and separated grain from said treshing and separating means and being operable to clean unwanted residue from the threshed and separated grain is disclosed wherein the cleaning apparatus, including at least a pair of cleaning sieves arranged to be oscillated generally back-and-forth for moving threshed and separated grain therealong while permitting the passage of cleaned grain therethrough, and further including a cleaning fan operable to direct a cleaning air blast to the cleaning sieves for urging unwanted residue to the threshed and separated grain into an airborne state for discharge from the combine harvester, is provided with an agitator positioned between the cleaning sieves. During operation, the cleaning sieves are moved relative to the agitator for removing straw particles that otherwise might tend to stick to one or both sieves in a generally upright orientation.

대표청구항 ▼

In a combine harvester having a frame; threshing and: separating means supported on said frame for threshing and separating crop material; and a cleaning apparatus supported from said frame proximate to said threshing and separating means and disposed to receive threshed and separated grain from the

In a combine harvester having a frame; threshing and: separating means supported on said frame for threshing and separating crop material; and a cleaning apparatus supported from said frame proximate to said threshing and separating means and disposed to receive threshed and separated grain from the threshing and separating means and being operable to clean unwanted residue from the threshed and separated grain, said cleaning apparatus including at least a pair of generally vertically spaced cleaning sieves arranged to be oscillated generally in a fore-and-aft direction for moving threshed and separated grain therealong while permitting the passage of cleaned grain and nonairborne residue therethrough, said cleaning apparatus further including a cleaning fan operable to direct a cleaning air blast to the cleaning sieves for urging at least a portion of unwanted residue in the threshed and separated grain into an airborne state for subsequent discharge from the combine harvester, the improvement comprising: an agitator means positioned between said pair of cleaning sieves so that said cleaning sieves are movable during operation thereof relative to said agitator means for removing nonairborne residue that otherwise might tend to stick to one or both of said cleaning sieves in a generally upright orientation.