Compliant Deck Overlapping Plates Dynamic Gap Adjustment
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Solution Overview
Problem
The existing corn head row units in combine harvesters face issues with kernel loss due to gaps being either too wide or too narrow, leading to either small ears falling through or butt shelling, and excessive debris accumulation, which affects corn yield and harvesting efficiency.
Innovation Solution
A corn head row unit with a compliant deck assembly featuring overlapping plates coupled to drive belts or chain links, allowing the gap to adjust dynamically based on stalk contact, ensuring optimal separation and collection of corn ears by rotating the decks in opposite directions to maintain a consistent gap width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gap of the deck plate is adjusted to be wide, then small ears of corn can pass through, but kernel loss increases and yield decreases
Solution Approach 1:
The patent applies the dynamics principle by making the deck plates movable rather than fixed. The intermediate portion of the deck plates is configured to move responsively to contact with stalks, allowing the gap to dynamically adjust between wide and narrow positions based on real-time conditions, thereby preventing both kernel loss and small ear passage issues
2Loss of substance
If the gap of the deck plate is adjusted to be narrow, then kernel loss is reduced, but excessive material and debris are collected and wrap on the auger
Solution Approach 1:
The movable intermediate portion allows the deck plates to dynamically widen the gap when debris accumulation is detected, preventing material from wrapping on the auger while maintaining narrow gap positioning during normal operation to prevent kernel loss
3Productivity
If the gap is fixed at an optimal setting, then separation efficiency is maximized, but adaptability to varying ear sizes and stalk conditions is reduced
Solution Approach 1:
The patent implements dynamics by enabling the intermediate portion of the deck plates to move responsively to contact with stalks of varying sizes and conditions, allowing the system to automatically adapt the gap width to match different crop conditions while maintaining optimal separation efficiency
Solution Approach 2:
The deck plates utilize the force from stalk contact itself to automatically adjust the gap width, with the intermediate portion moving in response to stalk contact without requiring external control systems, making the system self-regulating and adaptive
Data Source
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AI summary
A row crop header for an agricultural machine harvesting a crop having stalks, such as corn. The row crop header includes a frame, a first crop row divider mounted to the frame, and a second crop row divider mounted to the frame and spaced from the first crop row divider to define a space therebetween. A row unit is disposed at the space, wherein the row unit includes a deck assembly defining a gap, the deck assembly including a compliant deck configured to adjust the gap based on contact with the stalks of the crop. The compliant deck includes a plurality of overlapping plates having edges defining the gap where the edges are configured to move responsively to varying diameters of stalks. Crops are separated from the stalks upon contact with the overlapping plates. A gathering chain moves the separated crops toward a collector.