Broom Head With Stiffness Gradient For Particle Separation
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Solution Overview
Problem
Existing push brooms are inefficient in sweeping a range of particle sizes and surfaces due to the lack of a configuration that effectively combines bristles of varying stiffness for optimal particle removal.
Innovation Solution
A push broom head with tufts of bristles of decreasing stiffness arranged in rows from the leading edge to the trailing edge, where the leading rows are very stiff for heavy particles and the trailing rows are more bendable for finer particles, ensuring efficient sweeping and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single uniform bristle configuration is used, then the broom head structure is simple, but it cannot efficiently remove particles of different sizes and types
Solution Approach 1:
The broom head base is divided into multiple zones (front, middle, rear sections) with each zone having distinct bristle characteristics. The front section has shorter, stiffer bristles for heavy particles, while the rear section has longer, more flexible bristles for fine particles. This segmentation allows the broom to handle different particle types efficiently without requiring a completely different broom design for each particle size.
Solution Approach 2:
Different regions of the broom head base are assigned different bristle properties tailored to local requirements. The front area uses bristles optimized for heavy debris removal, while the rear area uses bristles optimized for fine dust and debris. This local differentiation of bristle characteristics enables the single broom head to perform multiple sweeping functions simultaneously.
2Adaptability or versatility
If coarse bristles are used at the front for heavy particles, then heavy particle removal is improved, but fine particles are not effectively collected
Solution Approach 1:
The bristle array is segmented into functional zones: a front zone with coarse, stiff bristles for heavy particles, and a rear zone with fine, flexible bristles for light particles. This spatial segmentation ensures that both particle types are effectively removed in a single sweeping motion, doubling the productivity benefit.
Solution Approach 2:
The front portion of the base has locally optimized coarse bristles for heavy debris, while the rear portion has locally optimized fine bristles for dust and fine particles. This local quality differentiation ensures that each zone performs its specific function optimally without compromising the other.
3Adaptability or versatility
If varying bristle stiffness is implemented, then particle removal effectiveness is improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into distinct stages: creating the base with defined zones, attaching bristles to specific zones with different properties, and finishing the product. This segmentation of the manufacturing process makes it more manageable and scalable, reducing the overall complexity despite the varied bristle requirements.
Solution Approach 2:
The base is designed with clearly defined zones that specify different bristle requirements. This local quality specification guides the manufacturing process, allowing standardized bristle production that is then selectively attached to different zones. This approach simplifies manufacturing compared to custom-making each bristle variation.
4Reliability
If bristles of the same length are used, then the broom head structure is uniform and simple, but wear is not evenly distributed
Solution Approach 1:
The bristle array is segmented by length and stiffness characteristics, with shorter, stiffer bristles in the front zone and longer, more flexible bristles in the rear zone. This segmentation distributes wear more evenly across the bristle array, as each zone's bristles are optimized for the specific wear patterns they experience during sweeping operations.
Solution Approach 2:
Different zones of the base have locally optimized bristle lengths and stiffnesses. The front zone uses shorter, stiffer bristles that resist wear from heavy particle impact, while the rear zone uses longer, more flexible bristles that wear more uniformly. This local quality differentiation improves overall reliability by preventing premature failure of any single zone.
Data Source
AI summary
A push broom head comprising a base with a leading edge and a trailing edge separated by a width of the base; and tufts of bristles extending from a surface of the base; the tufts of bristles being arranged in rows of bristles of decreasing stiffness from the leading edge to the trailing edge of the base, with a leading row of very stiff bristles and a trailing row of bendable bristles, thereby combining increased ease of handling by a user for an efficient sweeping action, the leading rows loosening and moving heavier particles and the trailing rows loosening and moving finer particles not acted upon by the stiff leading rows.