Floor Brush Eccentric Drive Mechanism to Reduce Roller Entanglement
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Solution Overview
Problem
Vacuum cleaners face issues with roller brush entanglement with hair and threads due to high assembly precision requirements and potential misalignment caused by belt jerking, leading to manual cleaning needs and reduced performance.
Innovation Solution
A floor brush assembly with an eccentric driving mechanism using a transmission shaft and linkage structure, allowing the roller brush body and sleeve to rotate independently, reducing assembly precision needs and preventing misalignment, while enabling bristle extension and retraction to avoid entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gear transmission structure is used for the drive mechanism and sleeve, then power transmission is achieved, but assembly precision requirements become high and misalignment occurs
Solution Approach 1:
The patent replaces the traditional gear transmission structure with a belt transmission system. The belt connects the driving wheel to the roller brush body and sleeve, eliminating the need for precise gear meshing and reducing assembly precision requirements while maintaining reliable power transmission.
Solution Approach 2:
The patent introduces a belt as an intermediary element between the driving wheel and the driven components (roller brush body and sleeve). This belt acts as a flexible mediator that transmits power while accommodating misalignment and reducing the need for precise assembly between components.
2Manufacturing precision
If the roller brush body is driven by belt transmission, then assembly precision requirements are lowered, but the roller brush becomes tangled with hair and threads
Solution Approach 1:
The patent makes the bristles dynamic by allowing them to rotate independently within the roller brush body. The roller brush body can rotate in the same direction as the bristles to pick up debris, then rotates in the opposite direction to甩 off hair and threads, preventing entanglement while maintaining effective cleaning.
Solution Approach 2:
The patent implements periodic bidirectional rotation of the roller brush body. The roller brush alternates between rotating in the forward direction (to collect debris with bristles) and backward direction (to甩 off tangled hair and threads), creating a periodic cleaning action that prevents entanglement buildup.
3Reliability
If the roller brush body and sleeve are driven independently, then misalignment is prevented, but the structure becomes more complex
Solution Approach 1:
The patent combines the driving functions for the roller brush body and sleeve into a single integrated belt transmission system. One belt connects the driving wheel to both components, allowing independent rotation while sharing a common drive source, thus reducing overall mechanism complexity while maintaining alignment stability.
Data Source
AI summary
Provided are a floor brush assembly for a vacuum cleaner and the vacuum cleaner. The floor brush assembly includes a roller brush component and a driving mechanism. The roller brush component includes a sleeve and a roller brush body rotatably mounted in the sleeve. The roller brush body is provided with bristles. The driving mechanism includes a power source and a transmission component. The transmission component includes a first driving member, a second driving member, and a driving wheel connected to the power source. The driving wheel is connected to the first driving member through a transmission shaft to drive the roller brush body to rotate. The driving wheel is connected to the second driving member through a linkage structure to drive the sleeve to rotate. The first driving member and the second driving member are eccentrically arranged to allow the bristles to be selectively extended out of or retracted into the sleeve.