Threshing and separating device and combine harvester with threshing and separating device

Abstract

The invention relates to a threshing and separating device which is provided with a first threshing and separating mechanism, a second threshing and separating mechanism and a middle feeding mechanism located between the first threshing and separating mechanism and the second threshing and separating mechanism. The first threshing and separating is provided with a toothed bar type first roller and a grid type first concave plate, and the face, facing the first roller, of the first concave plate is not provided with any part protruding into the addendum circles of threshing teeth of the first roller. The second threshing and separating mechanism is provided with two abreast toothed bar type second rollers and corresponding grid type second concave plates, and the face, facing the corresponding second roller, of each second concave plate is not provided with any part protruding into the addendum circles of threshing teeth of the corresponding second roller. Each second roller comprises a force leading-in part located at the front end and a roller bar tooth part located behind the force leading-in part, wherein the force leading-in part is provided with a truncated cone and spiral blades located on the truncated cone, the roller bar tooth part is provided with a plurality of parallel second rods which are evenly distributed along the circumference, and each second rod is provided with a plurality of threshing teeth. The invention further relates to a combine harvester with the threshing and separating mechanisms.

Description

technical field [0001] The invention relates to a threshing and separating device and a combine harvester provided with the threshing and separating device. Background technique [0002] A combine harvests crops by means of a harvesting device, and separates crop kernels from the cut crop by a threshing and separating device. Chinese patent ZL00137715.9 discloses a combined threshing and separation device of cutting flow and longitudinal axial flow. At present, this type of threshing and separation device has become the standard structure of large harvesters with a feed rate greater than 7Kg / s. However, for crops with great difficulty in grain separation and good crop stem toughness, such as rice, damage to the grain and being blocked are problems that this threshing separation device and the combine harvester with the threshing separation device often encounter, and thus must be Resulting in increased power consumption of the combine harvester. The above-mentioned proble...

AI Technical Summary

Problems solved by technology

However, for crops with high grain separation difficulty and good crop stem toughness, such as rice, damage to the grain and being blocked are problems that this threshing separation device and the combine harvester with the threshing separation device often encounter, and thus must be Resulting in increased power consumption of the combine harvester

The above problems become especially pronounced for combines with larger feed volumes

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