Tapered Cleaning Roller Structure for Hair Pickup and Airflow Control
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Solution Overview
Problem
Existing cleaning rollers for autonomous cleaning robots face challenges in efficiently picking up debris, particularly hair and filaments, which can wrap around the rollers and impede their functionality, and in maintaining effective airflow for debris ingestion.
Innovation Solution
A cleaning roller design featuring a tapered core and sheath with collection wells, improved torque transfer through a specific shaft and support structure configuration, and a unique vane arrangement that guides debris towards the center for efficient pickup and airflow concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional cylindrical cleaning roller is used, then the structure is simple, but filament debris wraps around the roller and impedes functionality
Solution Approach 1:
The roller is segmented into a core structure and an outer shell with collection wells, allowing the roller to be divided into functional zones that prevent filament entanglement while maintaining cleaning effectiveness
Solution Approach 2:
Collection wells are extracted from the roller surface to create dedicated areas for capturing and containing filament debris, removing the harmful effect of entanglement from the main cleaning surface
2Productivity
If the roller length is increased to improve debris pickup coverage, then the pickup efficiency improves, but the torque required to rotate the roller increases
Solution Approach 1:
The roller is divided into multiple independent cleaning zones along its length, each capable of being driven by the vacuum airflow, reducing the torque burden on the drive motor while maintaining overall pickup efficiency
Solution Approach 2:
Vacuum airflow is used to drive the roller rotation and move debris, reducing the mechanical torque requirement while improving debris pickup efficiency through aerodynamic forces
3Productivity
If the roller engages more filament debris, then the cleaning effectiveness improves, but the filament entanglement increases and impedes operation
Solution Approach 1:
Collection wells that initially seem to be just structural features are converted into beneficial debris traps that capture and contain filament debris, transforming the harmful entanglement effect into a useful collection mechanism
Solution Approach 2:
Filament debris is collected and contained in accessible wells, allowing for easy removal and disposal, separating the cleaning function from the debris handling function
4Productivity
If the vacuum airflow is increased to improve debris ingestion, then the pickup efficiency improves, but the airflow required increases energy consumption
Solution Approach 1:
The vacuum airflow is divided into multiple zones that work cooperatively with segmented roller sections, improving pickup efficiency through distributed airflow management while reducing the total energy required compared to a single high-power airflow source
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A cleaning roller mountable to a cleaning robot includes an elongate shaft extending from a first end portion to a second end portion along an axis of rotation. The first and second end portions are mountable to the cleaning robot for rotating about the axis of rotation. The cleaning roller further includes a core affixed around the shaft and having outer end portions positioned along the elongate shaft and proximate the first and second end portions. The core tapers from proximate the first end portion of the shaft toward a center of the shaft. The cleaning roller further includes a sheath affixed to the core and extending beyond the outer end portions of the core. The sheath includes a first half and a second half each tapering toward the center of the shaft.