Spiral Brush Roller Structure for Stiff Lightweight Floor Cleaning
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Solution Overview
Problem
Existing brush rollers with spiral-shaped receiving shafts face challenges in achieving sufficient bending stiffness and form stability while maintaining a lightweight structure, due to the large forces acting on them, and existing solutions are complex and difficult to manage for laymen.
Innovation Solution
A brush roller design featuring a central self-supporting plastic hollow body with a spirally extending receiving shaft, where end pieces engage form-fittingly into the central segment and include shaft ends for bearings, and are elastically inserted via O-rings, with deflector elements and balancing weights for stable rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous brush roller with spiral-shaped receiving shaft is produced to achieve form stability and bending stiffness, then the structural strength is improved, but the manufacturing complexity and cost increase due to the large forces acting on it
Solution Approach 1:
The brush roller is divided into a central segment and two end pieces that can be produced separately and then assembled. The central segment with the spiral receiving shaft is manufactured as a molded plastic component, while the end pieces are produced as separate bearing carriers. This segmentation allows each part to be optimized for its specific function and assembled using simple form-fitting connections, reducing overall manufacturing complexity while maintaining structural integrity.
2Stability of the object's composition
If additional stabilizing components are added to the brush roller to improve form stability, then the structural rigidity is improved, but the device complexity increases
Solution Approach 1:
The bearing carriers are integrated directly into the end pieces of the brush roller, combining the support function with the structural elements. The form-fitting connections between the central segment and end pieces provide both mechanical attachment and structural stabilization, eliminating the need for separate stabilizing components. This merging approach maintains form stability while reducing device complexity.
3Reliability
If the brush roller is designed as a multi-part construction with spiral-shaped receiving shaft to improve brush strip guidance, then the brush strip retention is improved, but the ease of operation for brush strip exchange deteriorates
Solution Approach 1:
The brush roller is segmented into a central segment and removable end pieces. The end pieces can be easily detached from the central segment through the form-fitting connections, allowing users to remove and replace the brush strip without complex disassembly procedures. This segmentation maintains reliable brush strip retention during operation while enabling simple maintenance by laymen.
4Weight of moving object
If the central segment is made as a self-supporting hollow body of plastic to reduce weight, then the weight is reduced, but the bending stiffness may deteriorate
Solution Approach 1:
The brush roller combines plastic material for the central segment with metal or harder material end pieces that provide structural reinforcement. The plastic hollow body reduces weight while the integrated end pieces with bearing carriers provide the necessary bending stiffness and mechanical strength. This composite construction achieves both weight reduction and maintained structural integrity.
Data Source
AI summary
A rotating brush roller of a floor care device is a cylindrical rotational element including a hollow body as a central piece and end pieces to be supported via bearings in a brush housing of the floor care device. A spiral, outwardly open, receiving shaft or groove is provided in the outer circumferential surface of the hollow body for receiving and retaining therein a continuous spiral brush strip. The central piece is a self-supporting hollow body of plastic, into opposite ends of which the end pieces engage with a form-fitting connection. The receiving shaft for receiving the brush strip continues at least partially in the end pieces.