Surface Cleaning Head Torque Balance for Floor Contact
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Solution Overview
Problem
Conventional surface cleaning apparatuses, such as vacuum cleaners, face challenges in maintaining the front end of the cleaning head in contact with the floor due to torque exerted by the weight distribution, which affects cleaning efficiency and user experience.
Innovation Solution
The apparatus features a pivotally mounted upper section that counteracts the upward torque by positioning the pivot mount forward of the rear wheels' axis, ensuring the dirty air inlet remains in contact with the floor and reducing user-handled weight, with a flexible hose and fork section for alignment and support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the upper section is positioned vertically above the cleaning head, then the cleaning head height is reduced for better access under furniture, but the front end of the cleaning head lifts off the floor reducing cleaning effectiveness
Solution Approach 1:
The patent positions the upper section laterally offset from the cleaning head rather than directly above it, creating a counterbalancing moment that offsets the upward torque on the front end. This lateral offset arrangement acts as a counterweight mechanism, distributing the weight moment to maintain the cleaning head's front end in contact with the floor while still achieving reduced height for furniture access.
Solution Approach 2:
Instead of positioning the upper section only in the vertical dimension above the cleaning head, the patent introduces a lateral offset in the horizontal dimension. This dimensional change creates a moment arm that generates a counterbalancing torque, solving the problem of front end lift-off while maintaining the height reduction benefit.
2Ease of operation
If weight is removed from the cleaning head by placing components on the upper section, then maneuverability is improved, but the front end stability deteriorates causing variable cleanability
Solution Approach 1:
The lateral offset positioning of the upper section creates a counterbalancing moment that stabilizes the front end of the cleaning head. This counterweight effect compensates for the weight removal from the cleaning head, maintaining front end stability and consistent cleanability while preserving improved maneuverability.
Solution Approach 2:
The patent pre-positions the upper section in a laterally offset location during design, creating a built-in counterbalancing moment that automatically compensates for weight distribution issues. This preliminary structural arrangement ensures stable operation without requiring active control or adjustment during use.
3Manufacturing precision
If the dirty air inlet is positioned at the correct height for optimal cleaning, then cleaning quality improves, but the cleaning head becomes heavier when components are mounted on the upper section
Solution Approach 1:
The patent extracts heavy components (motor, cyclone separator) from the cleaning head and mounts them on the upper section. This extraction reduces the cleaning head weight while the lateral offset positioning of the upper section maintains the inlet position precision needed for optimal cleaning performance.
Data Source
AI summary
An upright surface cleaning apparatus has a front end, a rear end and opposed lateral sides and a surface cleaning head having a dirt inlet and rear wheels. The rear wheels have an axis of rotation and a radius. The surface cleaning apparatus also includes an upper section and an upper section mount. The upper section mount movably mounts the upper section to the surface cleaning head at a position forward of the axis of rotation of the rear wheels. The surface cleaning head is movable between an floor cleaning position and a storage position. The surface cleaning apparatus includes an air flow path extending from the dirt inlet to a clean air outlet with a suction motor and a treatment member provided in the air flow path. The air flow path comprises a hose extending between the surface cleaning head and the upper section.