Stand-On Floor Cleaner Layout for Compact Indoor Maneuverability
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Solution Overview
Problem
Existing floor cleaning machines, whether 'walk-behind' or 'ride-on', face limitations such as reduced cleaning speed, limited operator visibility, difficulty in steering and edge cleaning, and inefficiencies in indoor use due to size and control complexities.
Innovation Solution
A floor cleaning machine design with an operator standing on a platform between two independently driven rear wheels, utilizing electric mono wheel drive for enhanced mobility and visibility, allowing continuous directional changes without pre-selection, and maintaining a platform height of 200 mm for balance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator sits on a ride-on machine, then the operator has comfort and stability, but the machine size increases and mobility decreases
Solution Approach 1:
The operator platform is segmented from the main machine body, positioned between the rear wheels rather than integrated into a large chassis. This allows the operator to have a stable platform while the overall machine remains compact for indoor use.
Solution Approach 2:
The operator position is moved from a seated position on a large machine to a standing position on a compact platform between the wheels. This dimensional change in operator positioning allows compact machine design while maintaining operator stability.
2Volume of moving object
If the operator stands on a platform between rear wheels, then the machine size is reduced and visibility is improved, but operator stability may be compromised
Solution Approach 1:
The platform is positioned at a height that provides a stable center of gravity for the operator, neither too high to cause instability nor too low to restrict visibility. This creates an optimal equilibrium point for operator stability and visibility.
Solution Approach 2:
The operator's weight on the platform between the wheels serves as a stabilizing force, with the operator's position naturally centered between the driven wheels providing inherent stability during operation.
3Adaptability or versatility
If hydrostatic motors are used for wheel drive, then continuous directional changes are possible, but rumbling occurs during direction changes
Solution Approach 1:
The hydrostatic motor system is replaced with an electric motor system that drives the wheels through a differential mechanism. This substitution eliminates the rumbling noise associated with hydrostatic direction changes while maintaining the capability for continuous directional control.
Solution Approach 2:
A differential mechanism is introduced as an intermediary between the electric motors and the wheels, allowing smooth directional changes without the direct fluid pressure changes that cause rumbling in hydrostatic systems.
4Volume of moving object
If the operator walks behind the machine, then the machine can be compact, but cleaning speed is limited and operator visibility is poor
Solution Approach 1:
The machine is designed to perform both forward and backward movement effectively, allowing the operator to work from either direction. This multi-directional capability enables the operator to approach walls and edges from the front, improving both visibility and cleaning speed while maintaining compact dimensions.
Solution Approach 2:
The machine transitions from a static walk-behind configuration to a dynamic ride-on configuration where the operator can move with the machine. This dynamic positioning improves both visibility and cleaning speed while the compact platform maintains small overall dimensions.
Data Source
AI summary
Floor cleaning machine 1, comprising a cleaning system 2, 3, 4, at least one front wheel 5; 5′; 5a, 5b as well as two rear wheels 6a, 6b, 6a′, 6b′ and a drive mechanism 7; 7a, 7b, wherein the drive mechanism is an electric mono wheel drive and wherein the operator 8 is placed on the machine, characterized in that the operator is standing on a platform 9 which is located above the geometrical axis Z between the two rear wheels, wherein the maximum vertical distance between the platform and the floor is 200 mm. The front wheel can be a castor wheel 5 and the rear wheels 6a, 6b can be independently driven by drive motors 7a, 7b—instead of one castor wheel, two independent castor wheels 5a, 5b can be provided. The front wheel can also be a steered wheel 5′ which is powered by a drive 7 and the rear wheels 6a′, 6b′ can be independently suspended and not driven.