Adjustable Gathering Chain Assembly for Lodged Crop Harvesting
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Solution Overview
Problem
Conventional agricultural harvester headers face challenges in effectively harvesting both down/lodged and standing crops due to the fixed position of the driven sprockets, which either knock off dry stalks or pick up debris, and no single configuration is suitable for all crop conditions.
Innovation Solution
An adjustable gathering chain assembly that allows the driven sprocket to be moved between different positions relative to the drive sprocket using an adjustment unit, with optional sensor feedback for automatic adjustment, enabling the header to adapt to varying crop conditions by changing the distance between the sprockets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driven sprockets are situated in a prominently forward position relative to the deck plates, then the header is better suited to gathering and lifting stalks of down or lodged crop, but dry stalks tend to be knocked off by the gathering chain paddles before being engaged by the stalk rolls and row units tend to pick up rocks and other debris which can cause clogging or damage
Solution Approach 1:
The patent makes the driven sprocket position adjustable rather than fixed, allowing the operator to dynamically change the position between forward (for lodged crop) and rearward (for standing crop) configurations, thereby adapting to different harvesting conditions without the harmful effects of each extreme position
Solution Approach 2:
The patent changes the positional parameter of the driven sprocket relative to the deck plates, enabling the system to optimize performance for different crop conditions by adjusting this key geometric parameter
2Productivity
If the driven sprockets are disposed in a relatively forwardly projecting position, then the header is better suited to gathering and lifting stalks of down or lodged crop, but no single location has been shown to be effective in harvesting under all crop conditions
Solution Approach 1:
The patent enables a single header to perform multiple functions by allowing the driven sprocket position to be adjusted, making it effective for both lodged crop (forward position) and standing crop (rearward position), thereby achieving universality across different harvesting scenarios
3Object-affected harmful factors
If the driven sprockets are more rearwardly disposed relative to the deck plates, then the row units are better suited to gathering crop that is more upright or standing because they knock off fewer standing stalks, but they are less effective for down or lodged crop
Solution Approach 1:
The patent transforms the static driven sprocket position into a dynamic, adjustable configuration, allowing the operator to switch between rearward positioning (for standing crop with minimal knocking) and forward positioning (for lodged crop), thereby resolving the trade-off between these two opposing requirements
Data Source
AI summary
An adjustable gathering chain assembly for a header of an agricultural harvester includes a drive unit, a driven unit spaced from and movable with respect to the drive unit and an endless gathering chain extending between the drive unit and the driven unit. An adjustment unit including an idler member in engagement with the gathering chain is operable to move the idler member with respect to the drive unit in order to move the driven unit between first and second positions relative to the drive unit whereby the header may effectively harvest both standing crop and downed or lodged crop depending on harvesting conditions.