Joseph M. Biggerstaff,Alan R. Bergkamp,Bernard D. Regier
申请号：
US13688920
公开号：
US20130137492A1
申请日:
2012.11.29
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A threshing mechanism for a combine harvester has a cylindrical rotor for moving crop materials and a plurality of separator tines secured thereon for threshing crop material. A rotor chamber has a top casing forming an upper portion defining a volume of space between the rotor and the top casing. A plurality of crop transport vanes extend away from an inward surface of the top casing to direct the crop material generally helically along the chamber. The vanes have a rotor-facing edge at an outer end away from the inward surface of the top casing. The vanes are positionable between a base position and at least one extended position with respect to the rotor, wherein in the base position, the rotor-facing edge is positioned a greater distance from the rotor than when in the at least one extended position.
