Multi-segmented Deck Plate Auto Adjustment for Harvester Row Units
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Solution Overview
Problem
Conventional corn header assemblies face challenges with grain loss and inefficiency due to imprecise deck plate adjustments, which result in missed harvests and debris accumulation, especially when dealing with varying row spacings and stalk diameters.
Innovation Solution
A multi-segmented deck plate auto adjustment mechanism with spring-loaded segments that adjust to individual stalk diameters, allowing for zero clearance when no stalk is present and ensuring the deck plates remain closed, reducing grain loss and enabling harvesting across different row spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional rocker shaft control systems are used to control deck plate separation, then the deck plates can be adjusted, but the adjustment is difficult, jerky and imprecise due to mechanical tolerances and backlash
Solution Approach 1:
The deck plate is divided into multiple segments that can independently adjust to accommodate stalks of varying diameters. Each segment can move separately to maintain precise contact with the stalk while the overall deck plate structure remains stable, eliminating the backlash and imprecision issues of conventional rocker shaft systems.
Solution Approach 2:
The deck plate segments are designed to automatically adjust to the diameter of passing stalks without requiring manual intervention or complex control mechanisms. The segments self-regulate their position based on the stalk diameter, providing precise adjustment that adapts to each individual stalk while maintaining ease of operation.
2Productivity
If a fixed gap spacing between deck plates is used, then the structure is simple, but smaller ears of corn are pulled completely through the fixed gap and go unharvested
Solution Approach 1:
The deck plate is segmented into multiple independent sections that can adjust their position relative to each other. This allows the gap spacing to dynamically adapt to different stalk and ear sizes, ensuring that smaller ears are not lost through excessive gap spacing while maintaining structural simplicity through modular design.
Solution Approach 2:
The deck plate structure transitions from a fixed, static configuration to a dynamic system where segments can move independently. This dynamic adjustment capability allows the deck plate to optimize its gap spacing for each passing stalk, improving harvesting efficiency without requiring a completely complex structure.
3Adaptability or versatility
If deck plates remain open when no stalk is present, then the deck plates can accommodate varying row spacings, but grain falls out of deck plates not actively engaged with a row causing significant grain loss
Solution Approach 1:
The deck plate is divided into segments that can independently close when no stalk is present. Each segment can detect the absence of a stalk and close individually, preventing grain loss while still allowing the overall deck plate structure to accommodate varying row spacings through the coordinated movement of multiple segments.
Solution Approach 2:
Different portions of the deck plate can have different states - segments actively engaged with stalks remain open while segments not engaged with stalks close to prevent grain loss. This local differentiation allows the system to maintain adaptability to varying row spacings while minimizing grain loss in areas where it is not needed.
4Ease of manufacture
If conventional deck plate designs are used, then the structure is straightforward, but debris accumulates within the deck plates and interstitial spaces leading to trash accumulation in the corn header assembly
Solution Approach 1:
The segmented deck plate design creates smaller individual segments with reduced interstitial spaces compared to conventional full-length deck plates. This segmentation limits the areas where debris can accumulate, while the modular nature of the segments maintains manufacturing simplicity through standardized, repeatable components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces grain loss and allows for efficient harvesting in any direction by ensuring the deck plates remain closed except when a stalk is present, accommodating varying row spacings and stalk diameters, thereby enhancing operational flexibility and reducing debris accumulation.
Implementation Method 1
a plurality of biasing members for biasing each respective deck plate segment
Data Source
AI summary
A row unit for a header of an agricultural harvester. The row unit includes a frame, a first deck plate assembly mounted to the frame, and a second deck plate assembly mounted to the frame. The first and second deck plate assemblies each include a deck plate, a plurality of deck plate segments extending from the deck plate and moveable between a first position and a second position relative to the deck plate, and a plurality of biasing members for biasing each respective deck plate segment. The row unit includes both operator controlled macro adjustment and automatic micro adjustment of a gap between the first deck plate assembly and the second deck plate assembly. The micro adjustment is achieved through biasing members biasing each respective deck plate segment.