Multi-Speed Edge Cleaning Brush to Prevent Debris Scattering
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Solution Overview
Problem
Conventional edge cleaning brushes on autonomous floor cleaners often fling debris outside the cleaning path due to high tip velocity, and struggle to effectively clean hard-to-reach areas like edges and corners.
Innovation Solution
The edge cleaning brush design incorporates multiple cleaning implements with a planetary gear system, allowing different rotational velocities and configurations, such as concentric or offset axes, to optimize debris collection and prevent scattering, using blades or bristles that can sweep and dust effectively without flinging debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single high-speed rotational brush is used for edge cleaning, then the brush can rotate quickly to cover area, but large debris is flung outside the cleaning path
Solution Approach 1:
The edge cleaning brush is divided into multiple independent cleaning elements (first cleaning element, second cleaning element, third cleaning element) that can rotate at different speeds. This segmentation allows each element to handle different debris sizes appropriately, preventing large debris from being flung outward while maintaining high-speed rotation for fine dust collection.
Solution Approach 2:
Different cleaning elements are assigned different rotational speeds based on their specific function. The first cleaning element rotates at a higher speed for fine dust, while the second and third elements rotate at lower speeds to sweep large debris inward without flinging it. This local quality differentiation resolves the contradiction between speed and debris scattering.
2Productivity
If multiple cleaning elements rotate at different speeds, then sweeping performance improves, but device complexity increases
Solution Approach 1:
Multiple cleaning elements are integrated into a single edge cleaning brush assembly that shares common structural components such as the rotational mechanism, housing, and mounting structure. This merging approach allows different cleaning elements to rotate at different speeds while avoiding the complexity of completely separate brush assemblies.
Solution Approach 2:
The edge cleaning brush is designed as a multi-functional unit where a single assembly performs both high-speed fine dust collection and low-speed large debris sweeping through its multiple cleaning elements. This universality improves productivity without requiring separate dedicated brushes for each function, thereby limiting the increase in device complexity.
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
This design enhances sweeping performance by collecting large debris without scattering, while maintaining effective fine dust collection, improving the overall cleaning efficiency and coverage of hard-to-reach areas.
Implementation Method 1
The edge cleaning brush design incorporates multiple cleaning implements with a planetary gear system, allowing different rotational velocities and configurations
Implementation Method 2
using blades or bristles that can sweep and dust effectively without flinging debris
Data Source
AI summary
A floor cleaner can include a housing adapted for movement over a surface to be cleaned and at least one edge cleaning brush provided on the housing. The edge cleaning brush includes multiple cleaning implements which rotate on different axes. A gear system, such as a planetary gear system, can drive one cleaning implement at a lower speed than another cleaning implement.