Cutter Bar Height Adjustment System for Agricultural Implements

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Solution Overview

Problem

Agricultural harvesting equipment faces challenges in maintaining a consistent cutting height over varying terrain, leading to inconsistent cutting and potential damage from terrain contact, which affects crop yield and equipment longevity.

Innovation Solution

A height adjustment system using terrain contact elements and actuators to adjust the position of the cutter bar relative to the terrain surface, allowing for synchronized movement with the cutter bar and maintaining a consistent separation distance across the cutter bar's width.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the cutter bar is rigidly mounted to the header frame, then structural simplicity is maintained, but the cutter bar cannot adapt to terrain variations causing inconsistent cutting height and potential damage

Engineering Contradiction:

Improvecutter bar adaptability to terrainVSAvoidcutter bar mounting structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cutter bar is mounted on a rigid header frame but equipped with movable cutting blades that can independently adjust their vertical position through hydraulic actuators. This dynamic mounting allows the cutter bar to maintain structural simplicity while adapting to terrain variations through active control of blade position, resolving the contradiction between rigidity and adaptability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The cutting blades are designed to automatically follow terrain contours through hydraulic actuators that respond to terrain contact feedback. The system uses the terrain itself as a reference, allowing the cutter bar to self-adjust to maintaining consistent cutting height without external intervention, thus achieving adaptability without proportionally increasing system complexity.

Inventive Principle:

Principle #25Self-service

2Reliability

If the cutter bar is raised off the terrain surface, then protection from terrain impacts is achieved, but cutting height consistency is lost due to header wheel variations

Engineering Contradiction:

Improvecutter bar protection from damageVSAvoidcutting height consistency

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

Terrain contact elements are positioned to contact the terrain surface and provide feedback signals to the height control system. This feedback mechanism allows the system to detect terrain variations and automatically adjust the cutter bar height through hydraulic actuators, maintaining consistent cutting height while keeping the cutter bar protected from direct terrain impacts.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Terrain contact elements act as intermediaries between the terrain surface and the height control system. These elements contact the terrain to sense its profile but are mechanically separated from the cutter bar through the control system, allowing indirect communication of terrain information without direct transmission of impact forces to the cutter bar.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Duration of action of stationary object

If the cutter bar floats over the terrain, then protection from wear is achieved, but accurate height control becomes difficult

Engineering Contradiction:

Improvecutter bar service lifeVSAvoidcutter bar height control

Core Design Contradiction:

Duration of action of stationary objectVSMeasurement precision

Solution Approach 1:

The system uses terrain contact elements that provide continuous feedback about terrain profile to the height control system. This feedback enables precise measurement and control of cutter bar height relative to the terrain, allowing the cutter bar to float at a consistent offset distance while maintaining accurate height control through active adjustment.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system replaces direct mechanical contact between the cutter bar and terrain with a hydraulic control system. Instead of relying on mechanical floating mechanisms, the cutter bar height is controlled through hydraulic actuators responsive to terrain feedback, achieving both protection from wear and precise height control through a non-mechanical control approach.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20240334867A1Height positioning and adjustment system for an agricultural implement

Publication Date: 2024.10.10 HONEY BEE MANUFACTURING LTD

AI summary

An agricultural implement comprises: a main frame, an operational unit interconnected to the main frame, and a height adjustment apparatus interconnected to the main frame and the operational unit. The height adjustment apparatus comprises a terrain contact element that can be positioned to contact a terrain surface such that the contact element supports the operational unit at a vertical separation distance of the operational unit above the terrain surface. The height adjustment apparatus can adjust the vertical separation distance of the operational unit above the terrain surface. A shock absorbing assembly is operationally positioned between the main frame and the terrain contact element and provides for resilient deformation in response to forces transmitted during operation to the terrain contact element, from contact with the terrain surface. The shock absorbing assembly may absorb and/or cushion forces imparted to a component of the height adjustment apparatus.