Crop Conveyance Spinner for Rotary Header

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Solution Overview

Problem

Wide cut rotary harvesters face challenges in smoothly conveying outboard severed crop materials to the center, resulting in non-uniform crop flow into conditioner rolls, leading to issues like slugs, over-conditioning, and inferior quality hay.

Innovation Solution

The implementation of a harvesting header with a set of outboard rotary cutters equipped with an outer impeller and crop conveying spinners, which use paddles attached to a rotating disc to convey cut crop materials laterally inwardly toward the center opening, ensuring uniform crop flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple spinning cylindrical cages are used to throw crop towards the center, then crop conveyance is achieved, but the windrow becomes thick on the edges and thin in the center

Engineering Contradiction:

Improvecrop conveyanceVSAvoidwindrow uniformity

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The conveyance system is segmented into multiple functional zones: outboard cutters with impellers for initial lateral conveyance, and inboard cutters with oppositely rotating pairs for controlled feeding into conditioner rolls. This segmentation allows different regions to perform specialized functions, achieving uniform windrow distribution.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using spinning cages that throw crop outward and rely on gravity to return it to the center, the invention uses impellers and oppositely rotating cutter pairs that actively convey and control crop flow inward and through the conditioner rolls, reversing the conventional approach to achieve uniform distribution.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If augers are used to convey crop towards the center of header, then crop flow is improved, but the device requires many bearings and service points that increase maintenance requirements

Engineering Contradiction:

Improvecrop flowVSAvoidmaintenance requirements

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The invention extracts and eliminates the complex auger mechanism with its numerous bearings and service points, replacing it with a simpler system of impellers and oppositely rotating cutter pairs that convey crop without requiring multiple maintenance-prone components.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention uses simpler, more durable impeller and cutter designs that reduce the number of critical service points, making the system more reliable and easier to maintain compared to auger-based systems with many vulnerable bearings and alignment points.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Productivity

If rotary harvesters travel at increased speeds, then productivity is improved, but cutoff, feeding, and control problems are exacerbated

Engineering Contradiction:

Improvetravel speedVSAvoidcutoff and feeding control

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The invention employs dynamically rotating impellers and oppositely rotating cutter pairs that actively adapt to the high-speed flow of crop material, creating controlled lateral and rearward motion paths that maintain reliable cutoff and feeding control even at increased travel speeds.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The oppositely rotating cutter pairs and impellers create continuous, controlled crop flow through the conditioner rolls without interruption or hesitation, ensuring uniform feeding even at high speeds by maintaining constant engagement and controlled movement throughout the cutting and conditioning process.

Inventive Principle:

Principle #20Continuity of useful action

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 solution effectively addresses the non-uniform crop flow issue by ensuring that cut crop materials are conveyed smoothly and uniformly to the conditioner rolls, resulting in improved quality of the windrow and reduced drying issues.

Implementation Method 1

An outer impeller is fixed to the outboard rotary cutter for rotation therewith to convey cut crop material laterally inwardly toward the center opening of the header

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

Each crop conveyance spinner has an upright disc having a plurality of paddles attached to a front face of the disc, where the disc is mounted for rotation on a shaft

Methodology Applied

Scientific EffectRotational motion:

Data Source

PatentUS20250133992A1Wide Cut Rotary Header Having Crop Conveyance Spinner

Publication Date: 2025.05.01 AGCO CORP

AI summary

A harvesting header has a set of centrally disposed conditioner rolls disposed in a center opening of the header configured to condition crop as the header moves across a field in a direction of travel. The harvesting header includes a cutter bed including a plurality of rotary cutters extending across the path of travel of the header, each rotary cutter being rotatable about an upright axis. At least one crop conveying spinner is mounted outboard the center opening on either side of the center opening. Each crop conveyance spinner has an upright disc having a plurality of paddles attached to a front face of the disc. The disc is mounted for rotation on a shaft, the shaft forming a spinner axis, wherein the spinner axis is perpendicular with the impeller axis.