Brush roller bar for a cleaning device
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Solution Overview
Problem
Existing brush roller bars in cleaning devices, such as vacuum cleaners, generate vibrations and noise during operation due to the rotation and interaction with surfaces, which affects cleaning efficiency and user experience.
Innovation Solution
A brush roller bar with a variable geometry body and flexible dust pickup elements, where the radius and height of the outer surface change along the longitudinal axis to maintain constant forces on the ends, reducing dynamic excitation and noise. The design includes truncated cones and brush strips arranged helically or as a continuous curve to ensure efficient dust pickup and balanced operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the brush roller bar rotates during cleaning to brush off debris and dust from the surface, then cleaning efficiency is improved, but vibrations and noise are generated
Solution Approach 1:
The brush roller bar incorporates elements with varying heights along its length, creating local variations in the brushing action. This non-uniform configuration distributes the contact forces more evenly across the support structure, reducing vibrations and noise while maintaining effective cleaning across different surface areas.
Solution Approach 2:
The invention changes the geometric parameters of the brush roller bar by varying the height of elements along its length. This parameter variation optimizes the distribution of contact forces during rotation, reducing dynamic excitations and the resulting vibrations and noise, while preserving cleaning effectiveness.
2Object-generated harmful factors
If the radius and height of the outer surface change along the longitudinal axis, then constant forces on the brush ends are maintained reducing dynamic excitation, but the structure becomes more complex
Solution Approach 1:
The brush roller bar is divided into multiple elements or segments along its length, each with specific height variations. This segmentation allows the complex variable geometry to be constructed from simpler repeating units, making manufacturing more feasible while achieving the force distribution benefits.
Solution Approach 2:
The invention employs curved or conical surfaces for the elements, transitioning from straight cylindrical forms. This curvature allows for smoother variation in radius and height along the longitudinal axis, reducing abrupt changes in geometry and simplifying the manufacturing process while maintaining the force-balancing effect.
Data Source
Figure 1~2
AI summary
A roller bar (1) for a suction nozzle, that rotates about a longitudinal axis (A), comprises a body (3) having an outer lateral surface (2) which is with a distance from the axis (A) by a radius (R) of a length (L), and at least one element (4) of a height (H) for dust pickup that extends substantially radially outwardly from the body (3) and the length (L) of the radius (R) and the height (H) of the element (4) for dust pickup change along the longitudinal axis (A) with respect to at least a portion of the body (3), and the sum of the length (L) of the radius (R) and the height (H) of the element (4) along the longitudinal axis (A) of the body (3) adopts a fixed value.