Agricultural Stalk Roll with Overlapping Auger Flights
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Solution Overview
Problem
Current agricultural row unit designs with shallow auger spiral flights and significant gaps between them fail to securely capture stalks, leading to misalignment and improper processing during crop harvesting.
Innovation Solution
The row unit features a pair of counter-rotating stalk rolls with tapered annular bases and overlapping auger flights that extend radially, ensuring a positive and secure transfer of stalks by maintaining a consistent outer diameter and minimizing the gap between the auger flights and the annular base, guiding the stalks towards the blades for efficient processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If shallow auger spiral flights with significant gaps are used, then the device complexity is reduced, but the reliability of stalk capture deteriorates
Solution Approach 1:
The patent changes the geometric parameters of the auger flights by increasing the outer diameter and modifying the spiral configuration. This creates overlapping flights that eliminate gaps, directly improving stalk capture reliability without adding complex mechanical components
Solution Approach 2:
The patent transitions from a two-dimensional spiral pattern to a three-dimensional overlapping configuration where flights extend beyond a single rotational plane. This dimensional change allows the flights to interlock and capture stalks more effectively while maintaining structural simplicity
2Manufacturing precision
If shallow auger spiral flights are used, then the manufacturing precision requirements are reduced, but the alignment accuracy of stalks deteriorates
Solution Approach 1:
By increasing the outer diameter of the auger flights and adjusting the spiral geometry, the patent creates a configuration where the overlapping flights naturally guide and align stalks. This parameter change improves alignment accuracy while maintaining feasible manufacturing tolerances
Solution Approach 2:
The overlapping auger flights perform preliminary alignment of stalks before they reach the cutting blades. This preliminary action ensures proper stalk positioning and alignment, reducing the need for high-precision manufacturing of individual flight components
3Ease of manufacture
If significant gaps between auger flights are maintained, then the ease of manufacture is improved, but the productivity of stalk processing deteriorates
Solution Approach 1:
The patent modifies the outer diameter and spiral geometry parameters to create overlapping flights that eliminate gaps. This ensures continuous stalk engagement and prevents misalignment, thereby improving processing productivity while maintaining manufacturability through standardized dimensional changes
4Adaptability or versatility
If the outer diameter of auger flights varies, then the adaptability to different stalk sizes is improved, but the consistency of stalk feed deteriorates
Solution Approach 1:
The patent maintains a constant outer diameter for the auger flights while adjusting the spiral geometry and overlap configuration. This consistent diameter ensures uniform stalk engagement and feed consistency, while the overlapping structure provides adaptability to different stalk sizes through increased contact area
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
This design ensures a consistent and secure capture of stalks, preventing damage and ensuring proper alignment for effective processing, enhancing the efficiency of the crop harvesting process.
Implementation Method 1
The at least one auger flight has a leading edge at its forward end, which extends generally perpendicularly relative to the rotational axis of said stalk roll to the outer diameter of the at least one auger flight
Data Source
Figure 1
AI summary
An agricultural harvester row unit has side-by-side stalk rolls oriented to receive crop stalks. Each of the stalk rolls have a forward section with an annular base tapered towards the forward end and spiral auger flights that overlap one another and cooperate with adjacent bases to positively move crop stalks in an aft direction.