Floor Vacuum Nozzle Pivot Joint for Flat Floor Contact
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Solution Overview
Problem
Existing floor nozzles for vacuum cleaners face challenges in maintaining contact with the floor surface during both forward and backward movements, leading to inefficient dust collection and uneven force distribution, which affects the pushing force and dust pick-up.
Innovation Solution
A nozzle design featuring a pivotable suction pipe connection piece with a vertically movable joint axis and a flexible air guidance line, where the force application point changes position relative to the roller axis during movement, generating varying torques to optimize contact force and dust collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the suction pipe connection piece is arranged with a low articulation point, then the suction head is relieved of vertical forces during forward movement, but the chassis is lifted off the floor surface during backward movement
Solution Approach 1:
The joint axis of the suction pipe connection piece is made vertically movable through a guide recess instead of being fixed, allowing the connection point to dynamically adjust its position. During forward movement, the joint axis moves to a lower position to reduce pushing force, while during backward movement, it moves to a higher position to prevent chassis lift-off and maintain reliable floor contact.
2Force
If the joint axis is fixed at a low position, then the pushing force is reduced, but the force distribution becomes unfavorable during backward movement
Solution Approach 1:
The connection point for force transmission is made dynamic through the guide recess mechanism. During forward movement, the joint axis positions itself low to minimize the lever arm and reduce pushing force. During backward movement, the joint axis positions itself high to optimize the lever arm for favorable force distribution, ensuring effective dust pick-up without compromising forward movement efficiency.
Data Source
Figure 1
Figure 2
AI summary
The nozzle has a chassis (1) with a rear chassis section (2) and a castor (3). A front section is provided in a suction direction (5) for connecting a vacuum generator (6). The vacuum generator is mounted around a horizontal axis (7) at the front section of the chassis. A joint axis (9) transfers sliding forces between a suction tube connecting piece (8) and the chassis by a connection (10).