Floating Vacuum Nozzle Linkage for Reduced Dense-Carpet Push Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vacuum cleaners face challenges when cleaning super soft carpets due to densely-packed fibers and impermeable carpet backing, which impede airflow and increase push force, causing the suction nozzle to become 'locked' and requiring higher effort to move the vacuum cleaner.
Innovation Solution
A vacuum cleaner design featuring a mechanical linkage that allows the suction nozzle to move independently with horizontal and vertical degrees of freedom, automatically adjusting its position relative to the chassis to reduce resistance and push force by lifting the nozzle when encountering high resistance, such as on super soft carpets or obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the suction nozzle is fixed to the chassis, then the structure is simple and stable, but the push force increases significantly on super soft carpets due to nozzle lock down
Solution Approach 1:
The suction nozzle is transformed from a fixed component to a dynamic one through the mechanical linkage system. The linkage allows the nozzle to move vertically and horizontally relative to the chassis, enabling automatic adjustment of the nozzle's contact with the carpet surface. This dynamic capability reduces push force by preventing nozzle lock-down on dense carpets while maintaining structural feasibility through a relatively simple four-bar linkage mechanism.
2Ease of operation
If the suction nozzle maintains constant contact with the surface, then cleaning effectiveness is maximized, but mobility decreases on challenging surfaces due to increased resistance
Solution Approach 1:
The mechanical linkage creates a dynamic contact system where the suction nozzle automatically adjusts its position based on surface conditions. On challenging surfaces like super soft carpets, the nozzle can lift slightly to reduce contact resistance and improve mobility. On flat surfaces, the nozzle maintains optimal contact for effective cleaning. This dynamic adaptation resolves the contradiction between mobility and cleaning effectiveness.
Solution Approach 2:
The mechanical linkage system enables the suction nozzle to self-adjust its position automatically in response to surface conditions without user intervention. When encountering high resistance surfaces, the linkage naturally allows the nozzle to lift; when on favorable surfaces, it maintains contact. This self-service capability ensures both mobility and cleaning effectiveness are optimized based on real-time conditions.
3Force
If the suction nozzle is allowed to move independently, then push force is reduced on dense carpets, but the structural complexity and potential instability increase
Solution Approach 1:
The mechanical linkage provides controlled independence to the suction nozzle, allowing it to move vertically and horizontally within defined parameters. The four-bar linkage mechanism ensures that the nozzle can adjust its position to reduce push force on dense carpets while maintaining a stable relationship with the chassis through the constrained degrees of freedom provided by the linkage geometry.
Data Source
AI summary
A vacuum cleaner is provided with a chassis and a suction nozzle coupled with the chassis for both vertical and horizontal movement relative to the chassis. The nozzle can be configured to automatically move vertically upon encountering a predetermined amount of resistance to forward or rearward movement of nozzle over a surface to be cleaned.