Auger Overload Control via Electronic Clutch

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Solution Overview

Problem

Lawn care vehicles face challenges in efficiently managing yard waste collection and conveying, particularly in preventing waste from escaping and ensuring easy operation and maintenance, with existing systems lacking effective overload protection and automated dumping mechanisms.

Innovation Solution

The integration of a telescopic seal for the conveyor to prevent waste escape, an automated dump assembly for easy yard waste disposal, and an electronic clutch system to manage auger load and prevent damage, along with a detachable conveyor joint for easy maintenance and operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a conveyor system is used to convey yard waste, then productivity is improved, but waste may escape from the conveyor causing harmful factors

Engineering Contradiction:
Improveyard waste conveyance efficiencyVSAvoidwaste escape
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

A flexible telescopic seal is positioned at the discharge end of the conveyor to prevent waste escape. The seal flexes and extends to maintain contact with the conveyor surface, creating an effective barrier that contains yard waste within the collector while allowing the conveyor to operate efficiently.

Inventive Principle:
Principle #30Flexible shells and thin films

2Ease of operation

If manual dumping of yard waste is required, then device complexity is reduced, but ease of operation deteriorates

Engineering Contradiction:
Improveyard waste disposal convenienceVSAvoidautomated dump assembly complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The automated dump assembly enables the yard waste collector to empty itself without manual intervention. When activated, the assembly automatically opens the discharge end and uses the conveyor mechanism to expel accumulated waste, significantly improving operational convenience despite adding some system complexity.

Inventive Principle:
Principle #25Self-service

3Productivity

If the conveyor operates continuously without engagement/disengagement, then productivity is improved, but ease of repair deteriorates

Engineering Contradiction:
Improvecontinuous conveyance efficiencyVSAvoidconveyor maintenance accessibility
Core Design Contradiction:
ProductivityVSEase of repair

Solution Approach 1:

The conveyor system is designed with detachable sections and modular components that can be easily separated from the main collector assembly. This segmentation allows individual components to be accessed, removed, and serviced independently while maintaining continuous operational capability of the overall system.

Inventive Principle:
Principle #1Segmentation

4Reliability

If no overload protection is provided for the auger, then device complexity is reduced, but reliability deteriorates

Engineering Contradiction:
Improveauger overload protectionVSAvoidelectronic clutch control complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The electronic clutch control system incorporates sensors and control circuitry that continuously monitor auger operating conditions. When overload conditions are detected, the system automatically adjusts clutch engagement to protect the auger, creating a feedback loop that enhances reliability without requiring complex mechanical protection mechanisms.

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP3435753B1Lawn care vehicle having an auger overload and control system
Publication Date: 2022.02.23 HUSQVARNA AB
  • EP3435753B1 patent drawingFigure 1
  • EP3435753B1 patent drawingFigure 2
  • EP3435753B1 patent drawingFigure 3

AI summary

An auger control system including an auger (100) configured to convey material from a receiving end of the auger to a discharge end of the auger, a motor (11) configured to produce a rotational force, and an electronic clutch (70) disposed between the auger (100) and the motor (11). The electronic clutch (70) is configured to be selectively engaged to provide the rotational force from the motor (11) to the auger (100). The auger control system may also include a clutch control circuit including processing circuitry (50) configured to engage and disengage the electronic clutch (70).