Surface cleaning apparatus
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Solution Overview
Problem
Conventional surface cleaning apparatuses with brushrolls often struggle to effectively agitate and remove debris from surfaces, particularly due to limitations in brushroll design that restrict the sweeping action and contact angle with the surface.
Innovation Solution
The design incorporates a brushroll with ribs extending outwardly from a cylindrical body, featuring a rib face that forms an angle between 60-120 degrees and brush members extending at angles between 70-110 degrees, allowing for improved sweeping action and increased contact duration with the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional brushroll design is used with limited contact angle, then the structure is simple, but the debris removal efficiency is poor
Solution Approach 1:
The brushroll is segmented into multiple functional zones along its length, with each zone having ribs at different angles and brush member configurations. This segmentation allows different portions of the brushroll to perform specialized functions (agitation, lifting, sweeping) thereby improving overall debris removal efficiency without requiring complete redesign of the entire brushroll structure
Solution Approach 2:
The invention introduces angular/directional dimensions to the brushroll design by varying rib angles and brush member orientations around the cylindrical perimeter. This multi-dimensional configuration enables the brushroll to engage the surface at multiple angles simultaneously, increasing contact duration and sweeping action effectiveness without significantly increasing structural complexity
2Productivity
If brush members are arranged at limited angles, then the manufacturing is simple, but the sweeping action is insufficient
Solution Approach 1:
The invention systematically varies key parameters including rib angles (ranging from 10 to 45 degrees relative to brushroll axis), brush member lengths, and angular positions around the circumference. These parameter changes optimize sweeping action by creating progressive agitation and lifting effects, while the variations follow patterns that can be manufactured using standard molding and assembly processes
3Productivity
If brushroll has short contact duration with surface, then the rotation speed can be high, but the debris removal is ineffective
Solution Approach 1:
The brushroll design incorporates preliminary agitation and lifting actions through strategically positioned ribs and brush members that engage the surface before the main sweeping zone. This preliminary action pre-loosens and elevates debris, allowing the subsequent brush members to more effectively sweep debris into the vacuum path, thereby improving debris removal efficiency without requiring excessive rotation speed
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 configuration enhances debris removal efficiency by allowing the brush members to engage the surface for a larger angle of rotation and distance, providing a more effective sweeping action compared to traditional brushrolls.
Implementation Method 1
The brush members engage the surface for a larger angle of rotation and distance, providing a more effective sweeping action
Data Source
AI summary
A surface cleaning apparatus comprises a brushroll that rotates about an axis. The brushroll defines a cylindrical portion and the axis extends centrally through the cylindrical portion. The brushroll also includes a rib that extends in a direction away from the axis. The rib includes a face extending along a line that is collinear with a secant through the cylindrical portion. A brush member extends from the face.