Straw Chopper for a Combine Harvester
AssigneeAGCO do Brasil Soluções Agrícolas Ltda.
InventorMarcelo Carpenedo
Life of this patent
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Abstract
A straw chopper for a combine harvester has blades extending outwardly from a central hub which rotates about a rotation axis. A feeding channel is formed along the full length of the chopper with an inlet and an outlet angularly offset around the rotation axis by less than 180 degrees. Inwardly facing guide vanes are provided on an outer drum around the blades and the guide vanes are angled so that they are non-perpendicular to the length direction. The vanes thus induce a small lateral movement of the straw so that cuts can be provided at multiple straw positions.
Claims16
A straw chopper for a combine harvester, comprising:
- an outer drum portion;
- a central hub within the outer drum portion, the central hub having a length, and a rotation axis along the length direction;
- and
- a set of blades extending outwardly from the central hub, wherein a feeding channel is defined between the outermost ends of the blades and the outer drum portion, wherein the feeding channel comprises an inlet along substantially the full length of an inlet end of the outer drum portion and an outlet along the substantially the full length of an outlet end of the outer drum portion, the inlet and outlet being angularly offset around the rotation axis by less than 180 degrees,
- wherein the outer drum portion comprises inwardly facing guide vanes, wherein the guide vanes comprise a first set to one lateral side of the outer drum portion and a second set to the other lateral side of the outer drum portion, each of the first set of vanes having a single common first non-perpendicular angle to the length direction and each of the second set of vanes having a second single common non-perpendicular angle to the length direction.
A straw chopper for a combine harvester, comprising:
- an outer drum portion;
- a central hub within the outer drum portion, the central hub having a length, and a rotation axis along the length direction;
- and
- a set of blades extending outwardly from the central hub,
- wherein the outer drum portion comprises inwardly facing guide vanes for guiding the flow of straw through the straw chopper, wherein the guide vanes are removable or retractable or adjustable so that the straw chopper has at least two different operating modes with different straw chopping characteristics.
Dependencies are inferred from the claim text.