Multi-Stage Crop Roller Vibration Reduction

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Solution Overview

Problem

Existing methods for terminating cover crops, such as herbicide application, result in excessive vibrations for operators of rolling and crimping devices, which can lead to health issues, and larger vibration-mitigating roller systems are not compatible with smaller farming operations due to power constraints.

Innovation Solution

A multi-stage roller assembly with a smooth first roller and a crimping second roller, connected via a pivot joint and compression frame, which applies a downward force and includes adjustable spring mechanisms to reduce vibrations and maintain contact with uneven terrain, designed for use with smaller tractors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rolling and crimping devices are used to destroy cover crops, then crop termination effectiveness is improved, but excessive vibrations are transmitted to the operator causing health issues

Engineering Contradiction:

Improvecrop termination effectivenessVSAvoidoperator vibrations

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The roller is divided into multiple independently mounted sections along its length, each capable of vertical movement relative to the frame. This segmentation isolates vibration sources and prevents transmission to the operator while maintaining crop destruction effectiveness

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The roller incorporates elastomeric or rubberized materials in the crimping elements and mounting systems. These composite materials absorb vibrations mechanically while maintaining the structural integrity needed for effective crop termination

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If vibration-mitigating roller systems are designed for large-scale operations, then operator comfort is improved, but compatibility with smaller farming operations is lost due to power constraints

Engineering Contradiction:

Improveoperator vibrationsVSAvoidtractor compatibility

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The roller features dynamically adjustable parameters including variable rotational speed control and adjustable crimping element pressure. These dynamic capabilities allow the same roller to be effectively operated by tractors of varying power levels, from small vegetable farm equipment to large-scale agricultural machinery

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system allows modification of operational parameters such as forward speed, roller rotation rate, and crimping force to match the power output of different tractor sizes. This parameter adaptability enables small-farm tractors to operate the roller effectively without requiring the high power of large-scale equipment

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If operating speed is reduced to minimize vibrations, then operator health is improved, but productivity decreases

Engineering Contradiction:

Improveoperator vibrationsVSAvoidoperating speed

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The roller is designed to operate at higher speeds by incorporating vibration-absorbing elements that allow rapid rotation without transmitting harmful frequencies to the operator. The segmented, elastomeric construction dampens vibrations even at high operational speeds, maintaining both productivity and operator health

Inventive Principle:

Principle #18Mechanical vibration

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

Effectively destroys and mulches cover crops while significantly reducing operator vibrations, making it suitable for smaller-scale farming operations without the need for excessive speed reduction.

Implementation Method 1

A pivot joint between the first roller frame and the second roller frame suppresses the transmission of vibrations from the second roller frame

Methodology Applied

Scientific EffectVibration suppression: Damping

Implementation Method 2

A compression frame extends between the main frame and the second roller frame so that a downwardly compression force is applied to the second roller

Methodology Applied

Scientific EffectCompression force: Compression

Data Source

PatentUS7987917B1Multistage crop roller

Publication Date: 2011.08.02 THE GOVERNMENT OF THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY DEPARTMENT OF HEALTH & HUMAN SERVICES

AI summary

The multi-stage crop termination system includes a main frame assembly connected to first and second roller frames. A first roller is installed in the first roller frame and a second roller is installed in the second roller frame. A compression frame extends between the main frame and the second roller frame so that a downwardly compression force is applied to the second roller. In the preferred embodiment, the first roller is a smooth drum and the second roller is a central cylindrical drum with a plurality of crimping bars extending outwardly from the drum. In operation, crops are flattened by the first roller and then crimped by the second roller. A pivot joint between the first roller frame and the second roller frame ensures that the second roller is able to maintain contact with the ground as the system traverses uneven terrain.