Vacuum Filter Locking Structure Without Elastic Interference Fit
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Solution Overview
Problem
Existing dust collector filtering devices face issues with structural aging and elasticity failure, leading to potential detachment during use, especially when the elastic end cap and support post interfere with each other, making them inconvenient to mount and dismantle.
Innovation Solution
A filtering device for dust collectors featuring a filter with a sealing member, a rack, an end cap with a penetrating end hole, and a locking mechanism comprising claw or buckle portions that secure the center post, eliminating the need for elastic interference fits and ensuring reliable fixation through injection molding parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an elastic end cap with an end hole is used to mount the filtering device on the rack, then the filtering device can be easily mounted and dismantled, but the elastic structure will generate problems of structure aging, elasticity failure after repeated use, leading to potential detachment
Solution Approach 1:
The patent replaces the reusable elastic end cap with a disposable plastic end cap that is integrally molded with the filtering device. The end cap includes a mounting portion with a mounting hole that receives the support post, and a sealing portion with a sealing member. This disposable design eliminates the problems of elastic fatigue and aging while maintaining ease of installation and removal.
Solution Approach 2:
The patent uses a composite structure combining plastic material for the end cap body with a separate sealing member (rubber or silicone ring) that is embedded in the sealing portion. This combination provides both the structural integrity needed for reliable mounting and the sealing function to prevent dust leakage, while avoiding the use of elastic materials for the mounting mechanism itself.
2Reliability
If the elastic end cap and support post use an interference fit for mounting, then the filtering device is securely fixed, but the interference fit makes mounting and dismantling inconvenient and difficult
Solution Approach 1:
The patent employs a disposable plastic end cap with a mounting hole rather than an interference fit mechanism. The mounting hole allows the support post to pass through easily for installation, and the disposable nature of the component means it can be removed and replaced without concern for wear or damage from repeated assembly cycles.
Solution Approach 2:
The patent extracts the sealing function from the mounting function by separating them into distinct components: the mounting portion with mounting hole handles fixation, while the sealing portion with embedded sealing member handles dust prevention. This separation allows easy mounting through the hole while maintaining secure fixation and sealing performance.
3Reliability
If the filter paper is replaced after accumulating dust, then normal operation is ensured, but the filter paper and filtering device must be replaced together if they cannot be easily dismantled, increasing maintenance complexity
Solution Approach 1:
The patent segments the filtering device into separable components: the filter paper is distinct from the end cap and sealing member. The end cap is integrally molded with the mounting portion and sealing portion, allowing the filter paper to be independently replaced. This segmentation enables maintenance of only the filter paper without replacing the entire filtering device structure.
Solution Approach 2:
The patent makes the end cap a disposable component that is integrally molded with the sealing member, while the filter paper remains a separate replaceable element. This allows users to replace only the consumable filter paper periodically, while the durable end cap structure can be reused or replaced as a complete unit, reducing overall maintenance complexity and cost.
Data Source
AI summary
A filtering device of a dust collector (i.e, vacuum cleaner) comprises a filter, a rack, an end cap, and a fixed portion. The filter has filter paper, a sealing member, and the end cap, the filter paper being disposed between the end cap and the sealing member. An end hole penetrating the end cap is provided on the end cap, and the filter is mounted on the rack. A center post is provided on the rack, and the center post runs through the end hole. A locking portion is disposed between the end cap and the fixed portion, and the locking portion firmly locks the center post when the fixed portion is fastened to the end cap. The filtering device of a dust collector does not have an elastic interference fit during implementation, and is more reliably secured; and therefore, it does not accidentally fall off during use.