Crop Distribution Hood Guide Rails for Precise Width Control
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Solution Overview
Problem
Existing crop distribution devices for combine harvesters either compromise on large lateral distribution at the expense of central distribution or lack precise control over the discharge direction across the working width.
Innovation Solution
A crop distribution device with inner crop guide elements divided into right and left groups, each coupled to different guide rails, allowing for sensitive control of the crop stream distribution across the working width, and featuring adjustable guide rails connected via slotted guides to minimize deformation and optimize distribution paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all material guide elements are connected to a single guide rail with concentric curvature, then the structure is simplified, but the discharge direction cannot be precisely adjusted across the working width
Solution Approach 1:
The group of material guide elements is divided into multiple subgroups, each connected to a different guide rail. This segmentation allows independent control of each guide rail, enabling precise adjustment of discharge directions for different sections of the working width while maintaining structural simplicity within each subgroup.
2Productivity
If guide rails cause large deflection for outer material guide elements to achieve wide distribution, then lateral distribution is improved, but excessive stress is applied to the guide elements
Solution Approach 1:
Different guide rails are designed with different deflection characteristics tailored to their specific positions and functions. Inner guide rails have smaller deflections suitable for central area distribution, while outer guide rails have larger deflections optimized for lateral distribution. This local optimization ensures adequate distribution width without subjecting any guide elements to excessive stress.
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a crop distribution device (29) for combine harvesters (2) with at least one discharge hood (34) equipped on the inside with crop guide elements (35, 36), wherein the crop distribution device (29) is supplied in its rear region with a crop flow (28) which is optionally or simultaneously discharged from a straw chopper (22) or a cleaning device (17), wherein the crop guide elements (35, 36) are divided into a right-side and a left-side group (37, 38) and each group (37, 38) of crop guide elements (35, 36) is coupled to at least a first and a further guide rail (41, 42), wherein each of the guide rails (41, 42) causes a deflection (43) of the crop guide element (35a..f, 36a..f) coupled to the respective guide rail (41, 42) and the at least two Guide rails (41, 42) of a group of guide elements (35a..f, 36a..f) cause a different deflection (43) of the respective guide element (35, 36).