Multi-Section Harvesting Header With Independent Drives for Turn Clogging
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Solution Overview
Problem
Existing harvesting headers experience localized blocking and clogging due to varying crop input rates across the header width, especially during turns, which prior art systems fail to address efficiently.
Innovation Solution
The header is designed with independently operable sub-assemblies, each with its own drive mechanism, allowing for variable speed control based on the radius of the curved path traveled by the harvesting machine, using mechanical or electrical drive systems and sensors for precise speed adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single centralized drive mechanism is used for the entire header, then the device complexity is reduced, but the productivity decreases due to localized blocking and clogging during turns
Solution Approach 1:
The header is divided into multiple independently driven sub-assemblies (e.g., left wing section, center platform section, right wing section), each with its own drive mechanism. This segmentation allows each section to operate at different speeds during turns, preventing crop blocking and maintaining harvesting productivity across the entire header width.
2Device complexity
If all sub-assemblies operate at the same speed, then the device complexity is reduced, but the reliability decreases due to crop blocking during curved path travel
Solution Approach 1:
The drive mechanisms are made dynamically adjustable, allowing each sub-assembly to operate at different speeds based on the harvesting machine's turning radius. During straight travel, all sections operate at the same speed; during turns, the outer sections increase speed while inner sections decrease speed, preventing crop blocking and maintaining reliable operation.
3Productivity
If independent drive mechanisms are used for each sub-assembly, then the productivity is improved by preventing clogging, but the device complexity increases
Solution Approach 1:
The system changes the operational parameters (speed) of each sub-assembly's drive mechanism based on the harvesting machine's turning radius. A control unit receives input about the turning radius and adjusts the rotational speed of each drive mechanism accordingly, allowing productivity maintenance through parameter adjustment rather than complex mechanical structures.
4Measurement precision
If complex sensor arrangements are used to determine crop distribution, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
Instead of using complex sensor arrangements to directly measure crop distribution, the system uses the turning radius of the harvesting machine as an intermediary parameter. The control unit calculates the effective forward speed variation across the header width based on the turning radius, which indirectly provides the information needed to adjust each sub-assembly's speed appropriately.
Data Source
Figure 1
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Figure 3~4
AI summary
A harvesting header (12) for attachment to a harvesting machine. The header (12) comprises two or more sub-assemblies (12A, 12B) each of which includes a respective crop gathering mechanism (30, 42) and a respective drive mechanism (46, 48, 50) coupled to operate the crop gathering mechanism. The drive mechanisms for the respective sub-assemblies (12A, 12B) are operable independently of one another to enable them to run at different speeds when the harvesting machine is performing a turn manoeuvre.