Modular Edge Brush Drive with Worm Gear for Reduced Debris Flinging
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Solution Overview
Problem
Existing edge cleaning brushes on floor cleaners often fail to effectively collect debris due to bristles flinging debris outside the cleaning path and are limited by their drive systems, restricting placement on the cleaner.
Innovation Solution
A modular surface cleaning apparatus with a gear train and worm drive system that reduces the rotational speed of edge cleaning brushes, allowing them to operate at slower speeds and maintain contact with the surface, coupled with a tensioner hub for downward force, ensuring efficient debris collection and flexible placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If edge cleaning brushes rotate at high speed, then cleaning coverage is improved, but debris is flung outside the cleaning path
Solution Approach 1:
The patent applies parameter changes by reducing the rotational speed of the edge cleaning brush from high speed to a slower, controlled speed. This speed reduction prevents debris from being flung outward while maintaining effective contact between the bristles and the floor surface, thereby eliminating the harmful effect without significantly compromising cleaning coverage.
Solution Approach 2:
The patent implements dynamics by making the edge cleaning brush speed variable rather than fixed at high rotation. The brush can operate at adjusted speeds to adapt to different cleaning conditions, allowing the system to optimize between coverage and debris control based on operational requirements.
2Device complexity
If a simple drive system is used, then device complexity is reduced, but placement flexibility is limited
Solution Approach 1:
The patent applies segmentation by dividing the drive system into separate, modular components including a gear train and a tensioning mechanism. This modular architecture allows the edge cleaning brush to be independently positioned and adjusted on the floor cleaner body, providing placement flexibility without requiring a completely complex integrated system.
Solution Approach 2:
The patent uses an intermediary tensioning mechanism that acts as a mediator between the drive system and the edge cleaning brush. This tensioning component allows for flexible positioning and secure attachment of the brush at various locations on the cleaner body, enabling adaptability while keeping the overall drive system architecture manageable.
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
The solution ensures that debris is effectively swept and collected by the edge cleaning brushes without being flung away, enhancing cleaning efficiency and flexibility in placement on the floor cleaner.
Implementation Method 1
The brush drive coupling includes a gear train operably coupleable with the brushroll and a gear casing housing the gear train
Implementation Method 2
A drive coupling between the attachment hub and the brushroll includes a worm operably coupled with brushroll for rotation therewith
Implementation Method 3
a belt coupled with the second gear to transmit the rotational force of the two-stage gear to a driven gear coupled with the attachment hub of the edge brush
Data Source
AI summary
A surface cleaning apparatus can include a housing adapted to move across a surface to be cleaned, an edge brush, and a brushroll driven by a brush motor. The edge brush is connectable with a drive coupling for rotating the edge brush, and is indirectly driven by the brush motor via the brushroll. In one aspect, the edge brush and drive coupling comprise a modular unit removably coupled to the housing. In another aspect, the drive coupling can include a worm and a belt.