Offset Cleaning Unit for Wall-Edge Access and Narrow Spaces
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Solution Overview
Problem
Existing floor cleaning machines struggle to effectively clean areas close to walls and navigate through narrow spaces due to limitations in offset capabilities and mechanical complexity, leading to reliability and maintenance issues.
Innovation Solution
A floor cleaning apparatus with a cleaning unit that can operate in both offset and non-offset modes, featuring a swing mechanism linked to the steering mechanism for synchronized reorientation and a lifting device with an offset mechanism for adjustable cleaning reach, allowing for a fixed working width and obstacle response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a variable working width cleaning unit is provided to enable edge area cleaning, then the cleaning reach is improved, but the device complexity increases and reliability decreases
Solution Approach 1:
The cleaning unit is segmented into a fixed-width cleaning assembly and an extendable offset mechanism. The offset mechanism can be deployed to extend the cleaning reach when needed, and retracted when not needed, avoiding the complexity of a continuously variable width system while maintaining the ability to clean edge areas.
Solution Approach 2:
The cleaning unit employs a dynamic offset mechanism that can be extended or retracted based on operational requirements. This allows the system to transition between different cleaning reach states without requiring complex variable width mechanisms, thereby improving reliability while maintaining versatility.
2Speed
If the cleaning unit is directly attached to the steering axle for synchronized turning, then the steering response is improved, but the transition ratio control capability is lost
Solution Approach 1:
An intermediary linkage mechanism is introduced between the steering axle and the cleaning unit. This intermediary system transmits the steering motion while allowing for a transition ratio, enabling both synchronized steering response and controlled angular relationship adjustment between the cleaning unit and the apparatus body.
3Length of moving object
If the cleaning unit is offset to clean edge areas, then the cleaning capability near walls is improved, but the ability to pass through narrow spaces is reduced
Solution Approach 1:
The offset mechanism is designed to be dynamically extendable and retractable. When cleaning edge areas, the offset mechanism extends to provide the necessary cleaning reach. When navigating narrow spaces, the offset mechanism retracts, reducing the overall width of the apparatus and improving navigability through tight areas.
Data Source
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AI summary
An apparatus for cleaning a floor includes a housing, wheels by which the apparatus is adapted to move; a motive device for moving the apparatus, a steering mechanism, and a cleaning assembly including a cleaning unit and an offset mechanism adapted to move the cleaning unit to or from an offset position projecting beyond one lateral side of the apparatus. In another embodiment, an apparatus for cleaning a floor includes a housing, wheels by which the apparatus is adapted to move, a motive device for moving the apparatus, a steering mechanism, and a cleaning assembly including a cleaning unit and a swing mechanism indirectly linking the cleaning unit to the steering mechanism such that when the apparatus is in an operative mode, the cleaning unit reorients its position in synchronization with the path of travel of the apparatus. Optionally, a lifting device may raise and lower the cleaning assembly.