Vacuum cleaner with angled wheels
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Solution Overview
Problem
Hair and foreign substances often get caught in the wheels of vacuum cleaners, inhibiting the movement and rotation of the suction nozzle and reducing cleaning efficiency.
Innovation Solution
A vacuum cleaner with a wheel assembly that includes a rotatable wheel with an inclined rotating shaft, minimizing contact area with the floor surface to prevent hair and foreign substances from being caught, and featuring a coupling member to securely support the rotating shaft at an acute angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wheel is mounted on the suction nozzle to enable movement, then the mobility of the vacuum cleaner is improved, but hair and foreign substances get caught in the wheel, inhibiting its rotation and reducing cleaning efficiency
Solution Approach 1:
The rotating shaft is designed to be inclined at an acute angle (not perpendicular) to the bottom surface of the suction nozzle. This asymmetric configuration causes the wheel to make point contact or minimal line contact with the floor surface rather than face contact, significantly reducing the area where hair and foreign substances can accumulate and inhibit rotation.
2Stability of the object's composition
If the wheel contacts the floor surface for stable movement, then the stability of movement is improved, but the contact area increases, allowing hair and foreign substances to be caught in the wheel
Solution Approach 1:
The inclined rotating shaft creates an asymmetric contact geometry where the wheel touches the floor at a point or minimal line rather than across its entire width. This reduces the contact area from a large rectangular region to a minimal point, preventing hair accumulation while maintaining stable movement through proper structural support.
3Productivity
If a drum brush is mounted in the suction nozzle to improve cleaning efficiency, then the cleaning performance is improved, but the complexity of the suction nozzle structure increases
Solution Approach 1:
The drum brush and wheel assembly are integrated into a single unified structure where the drum brush is mounted within the same housing that contains the inclined rotating shaft and wheel. This merging of functions reduces the number of separate components and simplifies the overall structure while maintaining both cleaning efficiency and improved wheel performance.
Data Source
AI summary
Disclosed is a vacuum cleaner having an improved structure for preventing hair or foreign substances from being caught in a wheel. The vacuum cleaner includes a suction nozzle having a suction passage for cleaning a surface to be cleaned by a suction force and a wheel assembly accommodated in the suction nozzle and configured to be rotatable. The wheel assembly includes a wheel and a rotating shaft to rotatably support the wheel. The rotating shaft is inclined relative to a bottom surface of the suction nozzle.