Multi-Roller Support Assembly for Vacuum Cleaner Maneuverability
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Solution Overview
Problem
Existing surface treating appliances, such as vacuum cleaners, face challenges in providing a secure and efficient connection between components housed within a rotatable roller and those on the main body, requiring ducts and special bearings to maintain fluid flow and sealing, which complicates maneuverability and component mounting.
Innovation Solution
A support assembly comprising a central roller and a pair of outer rollers with spaced rotational axes, providing a continuous rolling support surface and allowing for component mounting, enhances stability and maneuverability while simplifying connections and seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single barrel-shaped roller is used to house components, then space is saved and components are integrated, but sealing connections and bearings become complex to accommodate rigid ducts
Solution Approach 1:
The single roller is divided into multiple rollers (central roller and outer rollers) with different functions. The central roller provides structural support and houses components, while outer rollers provide rolling support. This segmentation eliminates the need for complex seals and bearings by distributing functions across multiple simpler components.
Solution Approach 2:
The sealing and bearing functions are extracted from the roller structure itself. Instead of requiring the roller to provide both structural support and sealing/bearing capabilities (which creates complexity), the invention separates these functions, allowing the rollers to focus on support while simplifying the overall connection system.
2Device complexity
If a single roller supports the appliance, then structure is simplified, but maneuverability and stability are limited
Solution Approach 1:
The support function is segmented into multiple rollers arranged in a specific configuration. The central roller and outer rollers work together to provide both structural simplicity and enhanced maneuverability, allowing the appliance to be pushed, pulled, and steered more easily while maintaining a relatively simple overall structure.
Solution Approach 2:
The support system transitions from a single-point support to a distributed multi-point support system. By arranging rollers at different positions and orientations, the invention adds spatial dimensions to the support structure, improving stability and maneuverability without significantly increasing structural complexity.
3Adaptability or versatility
If rollers are spaced apart to define a mounting region, then component integration is improved, but the rolling support surface continuity is reduced
Solution Approach 1:
The rolling support surface is segmented into multiple contact points through the central and outer rollers. This segmentation creates a stable polygonal support base that provides both component mounting capability and continuous support, as the distributed rollers maintain contact with the floor throughout motion.
Solution Approach 2:
The invention merges the support function and component mounting function into a single integrated roller arrangement. The spaced rollers simultaneously provide a stable rolling support surface and define a mounting region, combining two functions that might otherwise require separate structures.
Data Source
AI summary
A support assembly for a surface treating appliance includes a central roller arranged to engage a surface and outer rollers at either end of the central roller. The rollers together define a rolling support surface, and the outer rollers rotate about an axis spaced from the rotational axis of the central roller. This arrangement of rollers provides a rolling support surface over a wide range of motions, and spacing the rotational axes of the rollers permits the rollers to be arranged relative to one another to define a region into which components of the appliance are mountable.