Cleaning pad for cleaning robot
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Solution Overview
Problem
Existing cleaning pads for autonomous robots often suffer from debris hot spots, uneven wetting, and excessive adhesion to the floor, which can lead to inefficient debris collection and increased resistance during cleaning operations.
Innovation Solution
A cleaning pad with a forward portion thinner than the aft portion, featuring a core of absorbent layers and a fibrous wrap layer, along with moisture-resistant material and transition regions, which allows for even debris distribution and reduced adhesion by promoting air passage beneath the pad, thus preventing debris accumulation on the floor and minimizing the need for abrasive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cleaning pad has constant thickness, then it is simple to manufacture, but debris accumulates excessively in certain areas creating hot spots
Solution Approach 1:
The pad employs varying thickness across its structure, with the aft portion being thicker than the forward portion. This local variation in geometry ensures that debris is distributed more evenly across the pad surface during cleaning operations, preventing the formation of debris hot spots while maintaining manufacturing feasibility through standard molding techniques.
2Quantity of substance
If the pad is thicker overall, then more debris can be collected, but the robot requires more torque to move the pad across the floor
Solution Approach 1:
The pad features a non-uniform thickness distribution where the aft portion is thicker to maximize debris collection capacity, while the forward portion is thinner to reduce the overall contact area and adhesion forces. This localized thickness variation allows the pad to collect more debris without proportionally increasing the torque required for movement.
Solution Approach 2:
The pad is effectively segmented into forward and aft portions with different thickness characteristics. This segmentation allows each region to serve its specific function: the forward thin portion reduces resistance and adhesion, while the aft thick portion maximizes debris holding capacity.
3Stability of the object's composition
If the pad has uniform thickness, then it maintains consistent contact with the floor, but it pushes fluid and debris in front of the pad creating piles
Solution Approach 1:
The pad employs a thickness gradient where the forward portion is thinner and the aft portion is thicker. This local variation allows the forward edge to glide smoothly over the floor surface without pushing debris and fluid ahead, while the aft portion maintains sufficient contact pressure for effective cleaning.
4Device complexity
If the pad has constant thickness, then it is structurally simple, but adhesion to the floor increases resistance to movement
Solution Approach 1:
The pad features varying thickness across its structure, with thinner forward portions and thicker aft portions. This local structural variation reduces the overall adhesion area and strength, thereby decreasing the resistance to movement without significantly complicating the manufacturing process.
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
The pad effectively collects debris evenly, prevents debris hot spots, reduces adhesion to the floor, and decreases the torque required for movement, enhancing cleaning efficiency and reducing the risk of scratching or scuffing.
Implementation Method 1
A forward portion of the pad is thinner than an aft portion of the pad. Varying thickness across a width of the pad provides several advantages.
Implementation Method 2
the wrap layer comprising a fibrous layer that is flexible and absorbent, the fibrous layer configured to absorb liquid through capillary action and transfer the liquid to the core
Data Source
AI summary
A cleaning pad for an autonomous cleaning robot evenly wets and collects debris for cleaning operations. The pad includes a core of absorbent layers for absorbing liquid through capillary action and for distributing the liquid within the cleaning pad. The pad includes a wrap layer around the core, the wrap layer comprising a fibrous layer that is flexible and absorbent, the fibrous layer configured to absorb liquid through capillary action and transfer the liquid to the core. The pad includes one or more transition regions spanning a cleaning width of the cleaning pad, the one or more transition regions dividing the cleaning pad into at least two segments. The forward positioned segment of the pad, of the at least two segments of the pad, has a lesser thickness compared to a thickness of an aft positioned segment of the at least two segments.