Self-Orienting Scraper Head for Floor Drying Coverage
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Solution Overview
Problem
Floor washing-drying machines struggle to effectively scrub surfaces during straight-line travel and tight turns, particularly when reversing, often leaving wet areas untreated due to inadequate coverage by the scraping blades.
Innovation Solution
The machine incorporates a scraping device with an arc-shaped design and an idle connection mechanism, allowing the head with scraping blades to rotate and position itself optimally behind the brushes during turns and reverse movements, ensuring complete surface coverage without the need for oversized blades or powerful suction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the machine makes tight turns during forward movement, then the machine can navigate curved paths, but the scraping blades fail to cover the entire wetted surface leaving untreated areas
Solution Approach 1:
The head is made rotatable relative to the machine body through an idle connection, allowing it to dynamically adjust its orientation. During tight turns, the head rotates to maintain an optimal position behind the brushes, ensuring the scraping blades continuously cover the entire wetted surface regardless of the machine's turning radius.
2Reliability
If the blades are extended farther than the brush extension to cover more surface, then surface coverage improves, but the machine structure becomes cumbersome and cluttered
Solution Approach 1:
Instead of extending the blades statically beyond the brush diameter, the invention uses a rotatable head mechanism. The head rotates to position the scraping blades optimally behind the brushes during turns, achieving complete surface coverage with blades of normal length, thus avoiding structural clutter.
3Reliability
If arc-shaped blades extending over half the brush circumference are used, then surface coverage during turns improves, but powerful suction means are required increasing energy consumption
Solution Approach 1:
The rotatable head mechanism positions the scraping blades to follow the wetted surface dynamically during turns. This reduces the suction area required compared to static arc-shaped blades, thereby reducing the power needed for suction and lowering overall energy consumption while maintaining complete surface coverage.
4Reliability
If the scraping device is made to follow machine direction changes automatically, then all wetted surfaces are wiped without leaving portions, but the mechanism becomes more complex
Solution Approach 1:
The head is connected through an idle connection that allows it to self-orient behind the brushes during turns without requiring complex active control systems. The rotation is passive and automatic, driven by the machine's movement itself, achieving complete surface coverage with a simple and effective mechanism.
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
This solution enables the machine to wipe all treated surfaces without leaving wet areas, even during tight turns and reverse operations, without complicating the design or increasing energy consumption, ensuring efficient cleaning in various maneuvering conditions.
Implementation Method 1
The head is connected to the machine body in an idle manner, allowing for relative rotation between these two parts. The rotation is caused by the friction force acting on the scraping device during machine movement.
Data Source
Figure 1
Figure 2
Figure 2A
AI summary
A floor washing-drying machine including a scraping device that is capable of automatic orientation. The scraping device follows changes of direction of the machine by a simple and effective orienting mechanism so as to wipe all the surface washed by a washing mechanism, without leaving any wet portions on the surface. An idle mode mechanism is achieved by a bushing to which the scraping device is connected. The bushing is mounted in an idle and axially slidable mode on the brush rotation shaft.