Flexible Guide for Straw Hood Blockage Reduction

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Solution Overview

Problem

Agricultural combines face challenges in smoothly transitioning between spreading and windrowing modes, leading to uneven feeding and potential blockages due to abrupt changes in crop material trajectory.

Innovation Solution

A re-positionable straw door with a flexible guide that deforms when switching between positions, creating a smooth trajectory path for crop residue and reducing the risk of rear hood blockages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a rigid straw door is used to switch between spreading and windrowing modes, then the device structure is simple, but the crop material trajectory changes abruptly causing uneven feeding and blockages

Engineering Contradiction:

Improvestraw door structureVSAvoidcrop material flow consistency

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies a flexible guide made of flexible material (such as flexible sheet material) that can deform and bend to create smooth transitions for crop material. The flexible guide is attached to the straw door and follows its movement between positions, maintaining continuous contact with the crop material flow to prevent abrupt trajectory changes and associated blockages.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent changes the physical state of the guide from rigid to flexible, allowing it to dynamically adjust its shape and orientation based on the straw door position. This parameter change enables the guide to maintain optimal alignment with the crop material flow path during mode transitions, ensuring consistent feeding to spreaders.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the straw door is re-positioned to direct crop material to different exits, then the adaptability between spreading and windrowing modes is improved, but the trajectory change causes feeding unevenness

Engineering Contradiction:

Improvemode switching capabilityVSAvoidcrop material distribution uniformity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The flexible guide acts as an intermediary element between the straw door and the crop material flow. It mediates the transition by gradually redirecting the crop material along a smooth curved path rather than an abrupt straight-line change, ensuring uniform distribution whether the door is in spreading position or windrowing position.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The flexible guide creates a curved trajectory path for the crop material during transitions. By replacing the abrupt angular change with a gradual curved transition, the guide ensures smooth flow of material to either the spreader exit or windrow exit, preventing feeding unevenness and maintaining distribution uniformity across different operating modes.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Device complexity

If a fixed guide is used for crop material flow, then the device structure is simple, but it cannot accommodate straw door re-positioning without causing blockages

Engineering Contradiction:

Improveguide structureVSAvoidcompatibility with straw door positions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The guide transitions from a fixed, static structure to a dynamic, movable structure that can adapt its position and shape. The flexible guide moves and deforms in coordination with the straw door re-positioning, maintaining optimal alignment with the crop material flow path in both spreading and windrowing modes, thereby preventing blockages while accommodating full range of motion.

Inventive Principle:

Principle #15Dynamics

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

The flexible guide ensures a consistent flow of crop material to spreaders, enhancing operational efficiency and reducing blockages, allowing seamless switching between spreading and windrowing modes without separate adjustments.

Implementation Method 1

a flexible guide associated with the straw door and having a shape that deforms when the straw door switches between positions

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS10188034B2Material guide for a straw hood of an agricultural vehicle

Publication Date: 2019.01.29 BLUE LEAF I P INC

AI summary

An agricultural vehicle includes a chassis; a crop processing mechanism carried by the chassis and configured to separate crop material and discharge crop residue therefrom; and a residue handling system that receives separated crop material and discharged crop residue from the crop processing mechanism. The residue handling system includes at least one spreader device defining a spreader exit; a windrow exit; a straw door selectively positionable between a first position and a second position, the straw door directed toward the spreader exit in the first position and directed toward the windrow exit in the second position; and a flexible guide associated with the straw door and having a shape that deforms when the straw door switches between the first position and the second position.