Harvester Header Paddle Unit for Center Zone Crop Conveyance
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Solution Overview
Problem
In agricultural harvesters, crop material can stagnate in a center zone due to supporting structures, hindering its movement into the feeder housing, leading to inefficient conveyance and processing.
Innovation Solution
An infeed assembly with a rotatable cylinder and paddle unit, featuring paddles with slidable wings, is introduced to direct cut crop material into the feeder housing, minimizing stagnant zones and enhancing conveyance efficiency by rotating paddles and wings in a varying overlapping relationship.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support structures are installed for the conveying augers, then the augers are properly supported and positioned, but the support structures create a center zone without positive crop material conveyance, causing crop material to stagnate
Solution Approach 1:
The invention uses a rotatable cylinder with paddles that can rotate to different positions, transforming the static support structure into a dynamic conveying mechanism. The paddles extend from the cylinder and can be positioned to actively push crop material through the center zone, eliminating stagnation while maintaining structural support.
Solution Approach 2:
The conveying function is segmented from the support structure. Instead of relying on a single static support, the invention divides the conveying action into multiple paddle elements distributed around the rotating cylinder, with each paddle contributing to pushing material through the center zone.
2Productivity
If opposed feed augers are used to convey crop material laterally inward, then the outer portions of the header are effectively utilized, but the center zone becomes a stagnant area where crop material re-circulates without positive conveyance
Solution Approach 1:
The rotatable cylinder with paddles acts as an intermediary mechanism between the opposed feed augers and the feeder housing. The paddles receive material from the augers and actively push it through the center zone, mediating the flow and eliminating the stagnant area that exists when augers alone are used.
Solution Approach 2:
The rotating cylinder provides periodic action through its rotation, with paddles sequentially engaging and pushing material through the center zone. This periodic pushing action ensures continuous positive conveyance through the previously stagnant area.
Data Source
AI summary
An agricultural harvester includes a header with an infeed assembly including a driving element configured to rotate; a cylinder rotationally coupled to the driving element and having a plurality of openings formed therein; and a paddle assembly eccentrically positioned and rotationally held within the cylinder. Each paddle assembly includes a plurality of paddles variably positioned through the openings in the cylinder. Each paddle includes a laterally slidable wing that withdraws into the cylinder when the paddle retracts into the cylinder, and slides outwardly as the paddle extends form the cylinder.