Cleaning Roller Flap Structure for Pet Hair Anti-Spooling
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Solution Overview
Problem
Existing cleaning robots and vacuum cleaners face difficulties in removing tightly wrapped filaments such as pet hair from their rollers, which leads to decreased cleaning performance and potential jamming.
Innovation Solution
The implementation of a cleaning robot with a flapper brush and sweeper brush design featuring an elongated core with radially extending bristles and compliant flaps, along with axial end guards to prevent filaments from spooling tightly around the core, and a roller cleaning tool with protrusions and a guide ring to remove accumulated debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If brush or beater rollers are used to agitate or sweep debris, then cleaning performance is improved, but filaments become tightly wrapped around the roller making removal difficult
Solution Approach 1:
The roller is segmented into multiple functional zones: a spooling section with compliant flaps that wrap filaments loosely, and a cleaning section with bristles that agitate debris. This segmentation allows filaments to be captured in a controlled manner rather than tightly wrapped, enabling easy removal while maintaining cleaning effectiveness.
Solution Approach 2:
Compliant flaps act as an intermediary between the roller core and filaments. These flaps provide a yielding surface that allows filaments to wrap loosely during operation, then easily detach during cleaning. The flaps mediate the interaction between the rotating roller and filaments, preventing tight entanglement while still capturing debris.
2Productivity
If pet hair accumulates rapidly on the roller, then cleaning effectiveness increases initially, but the roller jams and performance decreases
Solution Approach 1:
The roller design enables self-cleaning through its spooling mechanism. As the roller rotates, compliant flaps continuously wrap and then release filaments, creating a self-regulating system that prevents excessive accumulation. The natural spooling and unspooling action during rotation provides ongoing maintenance without external intervention, ensuring continuous operation.
3Strength
If the roller core is rigid to maintain structural integrity, then durability is improved, but filaments spool tightly and are difficult to remove
Solution Approach 1:
The roller exhibits local quality variation: the core maintains rigid structural integrity while compliant flaps attached to the core provide flexibility at the filament interface. This local differentiation allows the rigid core to provide strength while the flexible flaps enable easy filament removal, resolving the contradiction between structural integrity and removal ease.
4Ease of operation
If axial end guards are added to prevent filaments from traversing axially, then filament control is improved, but device complexity increases
Solution Approach 1:
The axial end guards are simple, inexpensive components that can be easily manufactured and replaced if needed. Their low cost and simple geometry make them worthwhile additions despite increasing component count, as they provide essential filament containment with minimal 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
The solution effectively prevents filaments from wrapping around the roller, facilitates easy removal of accumulated debris, and maintains cleaning efficiency by ensuring continuous operation without jamming.
Implementation Method 1
The flapper brush includes a compliant flap extending radially outward from the core to sweep a floor surface as the roller is driven to rotate. The flap is configured to prevent errant filaments from spooling tightly about the core
Implementation Method 2
The flapper brush includes axial end guards mounted on the core adjacent the ends of the outer core surface and configured to prevent spooled filaments from traversing axially from the outer core surface onto the mounting features
Implementation Method 3
The sensor system includes an emitter disposed near a first end of the cleaning roller and a detector disposed near an opposite, second end of the cleaning roller and aligned with the emitter. The detector configured to receive a signal emitted by the emitter to detect spooled material accumulated by the cleaning roller
Data Source
AI summary
A coverage robot includes a chassis, a drive system, and a cleaning assembly. The cleaning assembly includes a housing and at least one driven cleaning roller including an elongated core with end mounting features defining a central longitudinal axis of rotation, multiple floor cleaning bristles extending radially outward from the core, and at least one compliant flap extending radially outward from the core to sweep a floor surface. The flap is configured to prevent errant filaments from spooling tightly about the core to aid subsequent removal of the filaments. In another aspect, a coverage robot includes a chassis, a drive system, a controller, and a cleaning assembly. The cleaning assembly includes a housing and at least one driven cleaning roller. The coverage robot includes a roller cleaning tool carried by the chassis and configured to longitudinally traverse the roller to remove accumulated debris from the cleaning roller.