Twisted Side Draper Belt for Crop Harvester Headers
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Solution Overview
Problem
Existing crop harvesting headers face challenges in accommodating ground contour changes, leading to inefficiencies in crop transfer and potential interference between components due to rigid cutter bar arrangements, which restrict flexibility and accurate crop handling.
Innovation Solution
A crop harvesting header design featuring a draper belt system with a discharge end roller and an outer end roller, where the rear end of the discharge end roller is movable in an upward and downward direction relative to the outer end roller, allowing the draper belt to maintain a common plane and adjust its angle to reduce crop discharge height and accommodate flexing of the cutter bar, ensuring smooth crop transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rigid cutter bar arrangement is used, then accurate control of crop transfer is improved, but flexibility to follow ground contours deteriorates
Solution Approach 1:
The cutter bar is made dynamically adjustable through a height control system that allows the rear end of the cutter bar to be raised or lowered relative to the front end. This enables the cutter bar to adapt to ground contours while maintaining operational precision through controlled positioning.
Solution Approach 2:
The height and angle parameters of the cutter bar are made variable through the height control system. By changing these parameters in response to ground conditions, the system maintains both accuracy in crop transfer and adaptability to varying terrain.
2Adaptability or versatility
If the cutter bar is made flexible to follow ground contours, then adaptability to terrain is improved, but relative movement between cutter bar and draper causes crop transfer inefficiency
Solution Approach 1:
The side draper serves as an intermediary element between the flexible cutter bar and the feed draper. It accommodates the relative movement and position changes of the cutter bar while maintaining continuous, efficient crop transfer to the feed draper without interruption or inefficiency.
Solution Approach 2:
The draper system is segmented into side drapers and a feed draper, each handling specific portions of the crop transfer path. This segmentation allows independent adjustment and optimization of each segment to handle the flexible cutter bar movement while maintaining overall transfer efficiency.
3Stability of the object's composition
If a rigid header structure is used, then structural stability is improved, but component interference occurs due to inability to accommodate cutter bar movement
Solution Approach 1:
The header structure incorporates dynamic elements including the height control system for the cutter bar and the movable discharge end roller. These dynamic components allow the rigid header structure to adapt to ground contours and accommodate cutter bar movement without causing component interference.
Solution Approach 2:
The position parameters of key components (cutter bar height, discharge end roller position) are made variable within the rigid header structure. This allows the structure to maintain overall stability while locally adjusting parameters to prevent component interference during operation.
Data Source
AI summary
A header for a crop harvester includes side drapers having a front edge adjacent the cutter bar and carrying crop to a discharge end roller at a center feed draper. A support arrangement carries the rear end of the discharge end roller to define an operating position in which an axis of the discharge end roller is at an angle to an axis of the outer end roller of the side draper with the rear end of the discharge end roller at a height below a height of the rear end of the outer end roller. This provides a main portion of the belt that lies in a common plane defined by an intermediate guide member and the outer end roller and a smaller portion of the draper belt between the guide member and the rear end of the discharge end roller which is twisted downwardly from the common plane.