Draper Belt System With Offset Rollers Reducing Crop Loss
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Solution Overview
Problem
Harvesters experience significant crop loss due to the large gaps between rollers of the same diameter in traditional draper belt systems, which are used to transfer crops from lateral wings to a central processing area, as these gaps allow crops to fall through during harvesting.
Innovation Solution
A draper belt system with first and second draper belt assemblies, where the second assembly features a roller with a smaller diameter than the first, and the central longitudinal axes of these rollers are offset, minimizing the gap between the assemblies and reducing crop loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If rollers of the same diameter are used in traditional draper belt systems, then the structure is simple and easy to manufacture, but large gaps form between rollers causing significant crop loss
Solution Approach 1:
The patent applies asymmetry by using rollers of different diameters in the draper belt system. Specifically, the first roller has a different diameter than the second roller, creating an asymmetric configuration that eliminates the gap problem while maintaining structural simplicity. This asymmetric design allows the rollers to be positioned closer together, minimizing crop loss through the gap.
2Ease of operation
If rollers are spaced apart to provide clearance for pivoting and cleats, then the header can pivot and transfer crop effectively, but large gaps allow crop to fall through during harvesting
Solution Approach 1:
The patent applies local quality by positioning the smaller second roller at a specific location between the first roller and the central section. This local placement allows the roller to provide necessary clearance for pivoting and crop transfer while minimizing the overall gap. The asymmetric sizing creates a localized adjustment that maintains operational capability while reducing crop loss.
3Ease of manufacture
If adjacently positioned split belts are used to break down overall belt distance, then longer belts become manageable and replaceable, but same-diameter rollers create gaps causing crop loss
Solution Approach 1:
The patent resolves this contradiction by applying asymmetry to the roller diameters in the split belt configuration. The first and second rollers have different diameters, which allows the split belt assembly to maintain manageable length for replacement while eliminating the gaps that cause crop loss. This asymmetric design enables closer roller positioning without compromising belt replaceability.
Data Source
AI summary
A draper belt system is provided that includes first and second draper belt assemblies. The first draper belt assembly includes first and second rollers, and a draper belt looped around the first and second rollers. The first roller defines a first roller diameter, a first central longitudinal axis, and a first plane extending through the first central longitudinal axis. The second draper belt assembly includes third and fourth rollers, and a draper belt looped around the third and fourth rollers. The third roller defines a third roller diameter dimensioned smaller than the first roller diameter, a second central longitudinal axis, and a second plane extending through the second central longitudinal axis. The third roller of the second draper belt assembly is disposed adjacent to the first roller with the first central longitudinal axis extending parallel to the second central longitudinal axis, and the second plane offset from the first plane.