Linearly Displaceable Flex Arms for Harvester Cutterbar Ground Contouring

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Solution Overview

Problem

Existing agricultural harvesters face issues with the flex cutterbar not conforming to the ground surface effectively, leading to suboptimal crop harvesting due to inadequate flexure mechanisms.

Innovation Solution

A flex arm drive assembly is introduced to selectively and linearly displace flex arms in a vertical direction, allowing for precise adjustment of the cutterbar's angle and ground clearance, eliminating the need for arced pivoting and maintaining the angle of cutterbar shoes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional pivoting flex arms are used to flex the cutterbar, then the cutterbar can adapt to ground surface variations, but the angle of cutterbar shoes changes and the mechanism becomes complex

Engineering Contradiction:

Improvecutterbar flexure capabilityVSAvoidflex arm mechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent replaces the traditional pivoting mechanical system with a linear displacement system. Instead of using pivot joints and arced motion, the flex arms are coupled to drive assemblies that move them linearly in the vertical direction. This substitution simplifies the mechanism by eliminating complex pivot connections while maintaining the cutterbar's ability to flex and adapt to ground contours

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the motion parameter of the flex arms from rotational (pivoting) to translational (linear displacement). By controlling the vertical position of the flex arms through linear movement rather than rotation, the system maintains cutterbar flexure capability while preserving the angle of cutterbar shoes and reducing mechanical complexity

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If pivoting flex arms are used, then the cutterbar can flex to follow ground contours, but the cutterbar shoes lose their optimal angle

Engineering Contradiction:

Improveground contour following abilityVSAvoidcutterbar shoe angle precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent replaces the pivoting mechanism with a linear displacement system that moves flex arms vertically without rotation. This substitution ensures that the cutterbar shoes maintain their fixed optimal angle while the flex arms' vertical positioning enables the cutterbar to follow ground contours, thus preserving both adaptability and manufacturing precision

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent segments the motion function by separating the vertical positioning of flex arms from the angular orientation of cutterbar shoes. The drive assemblies independently control the vertical position of each flex arm while the cutterbar shoes maintain their fixed optimal angle, achieving ground contour following without compromising shoe angle precision

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11375664B2Agricultural header with linearly displaceable flex arms

Publication Date: 2022.07.05 BLUE LEAF I P INC

AI summary

A header for an agricultural harvester includes: a header frame; a flexible cutterbar carried by the header frame; a plurality of flex arms coupled to the cutterbar; and a flex arm drive assembly coupled to at least one of the flex arms and configured to selectively, linearly displace the at least one coupled flex arm in a vertical direction relative to the header frame.