Curved Guide Plate with Dovetail Rear Edge for Crop Distribution
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Solution Overview
Problem
Existing guide plates in straw choppers fail to distribute heavier crop residues, such as lost grains, evenly across the field, leading to undesired strip-shaped seed emergence due to their design, which results in inadequate lateral deflection of these particles.
Innovation Solution
A curved baffle plate with a V- or dovetail-shaped rear end, where the upper portion extends downward and forward, and the lower edge extends further rearward, allowing for increased lateral deflection of lighter residues and enhanced outward deflection of heavier particles, ensuring a uniform distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the guide plate rear ends are beveled relative to the vertical, then lighter crop residues are deflected by a larger angle and distributed more widely, but heavier grains and chaff fractions flow along the lower portions with insufficient deflection, resulting in accumulation and strip-shaped seed emergence
Solution Approach 1:
The guide plate is designed with different geometries for different vertical zones: the upper portion has a beveled rear end that slopes forward and downward to deflect lighter crop residues at larger angles, while the lower portion extends further rearward to provide sufficient deflection for heavier grains and chaff. This local differentiation ensures each zone optimally handles the particle types it encounters.
Solution Approach 2:
The invention extends the guide plate design into the longitudinal dimension by making the lower edge extend further rearward than the upper portion. This creates a three-dimensional configuration where the guide plate has both lateral curvature and longitudinal variation, allowing different deflection characteristics at different vertical positions along the plate.
2Quantity of substance
If the guide plate is curved to deflect lighter residues laterally, then wide scattering is achieved for light particles, but heavier particles require longer plate sections for adequate deflection, which increases device complexity
Solution Approach 1:
The invention combines multiple functions into a single integrated guide plate structure. The curved upper portion and the extended lower portion work together as one continuous component, simultaneously achieving wide lateral scattering for light particles and adequate deflection for heavy particles, rather than requiring separate components for different particle types.
Solution Approach 2:
The guide plate features a curved upper portion that provides gradual lateral deflection for lighter crop residues. This curvature, combined with the extended lower section, creates a smooth, continuous surface that guides particles of different weights and trajectories along optimized paths without sharp edges or discontinuities.
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 wide, uniform lateral scattering of crop residues, preventing streaks and achieving a more homogeneous distribution of heavier crop residues across the field.
Implementation Method 1
a curved guide plate with a V- or dovetail-shaped rear end, wherein an upper portion of the rear rim extends downwardly and forwardly from the rear end of the upper rim, and the lower edge extends further rearward
Data Source
Figure 1
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AI summary
The plate has a rear edge (102) with an upper area (108) extending downward and forward from a rear end of an upper edge (96), and a lower edge (100) extending backwards beyond a lower end (110) of the upper area of the rear edge. Rear end of the lower edge is connected with the lower end of the upper area of the rear wall by a lower area (112) of the rear edge for forming a V or dovetail shaped rear edge, where the plate is limited by the upper edge, a front edge (98), the lower edge and the rear edge, and is curved.