Floating Suction Nozzle Linkage for Soft 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 cleaner.
Innovation Solution
A vacuum cleaner design featuring a mechanical linkage that allows the suction nozzle to move horizontally and vertically independently of the chassis, automatically adjusting its position based on resistance to reduce push force and prevent nozzle lock-down, and an optional suction relief valve to adjust suction force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the suction nozzle is fixed rigidly to the chassis, then structural stability is improved, but push force increases due to nozzle lock-down on super soft carpets
Solution Approach 1:
The suction nozzle is made dynamically adjustable through a mechanical linkage system that allows it to move vertically and horizontally relative to the chassis. This enables the nozzle to adapt its position based on surface conditions, preventing lock-down on soft carpets while maintaining stability on harder surfaces through active control rather than rigid fixation.
Solution Approach 2:
The connection between the suction nozzle and chassis is segmented into multiple independent degrees of freedom using a mechanical linkage system. This segmentation allows the nozzle to move independently in vertical and horizontal directions, decoupling the stability of the chassis from the position of the nozzle, thereby reducing push force while maintaining overall structural integrity.
2Ease of operation
If the suction nozzle is made movable to reduce push force, then ease of operation is improved, but device complexity increases due to mechanical linkage
Solution Approach 1:
The mechanical linkage system is designed to be self-actuating, using the natural interaction between the suction nozzle and the cleaning surface to drive the movement. When the nozzle encounters resistance or lock-down, the mechanism automatically adjusts its position without requiring external sensors, motors, or control systems, thereby reducing operational complexity while maintaining ease of movement.
Solution Approach 2:
A mechanical linkage acts as an intermediary between the fixed chassis and the movable suction nozzle. This intermediary component translates the forces and movements between the two, providing the necessary degrees of freedom while maintaining a simple, passive mechanical connection that does not add significant complexity to the overall device.
3Force
If mechanical linkage is added to allow nozzle movement, then push force is reduced, but manufacturing complexity increases
Solution Approach 1:
The mechanical linkage incorporates flexible components such as bellows or expandable joints that allow for vertical and horizontal movement of the suction nozzle. These flexible elements can be manufactured using standard forming processes and provide the necessary degrees of freedom without requiring complex assembly or precision machining, thereby reducing manufacturing complexity while achieving the force reduction goal.
4Productivity
If the suction nozzle is allowed to float independently, then cleaning efficiency on super soft carpets is improved, but structural stability deteriorates
Solution Approach 1:
The mechanical linkage system provides multi-functionality by simultaneously enabling nozzle movement for improved cleaning efficiency on soft surfaces while maintaining structural stability through its connection to the chassis. The same linkage structure that allows floating movement also provides the necessary support and stability when the nozzle is in contact with harder surfaces, making the system universally effective across different carpet types.
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.