Air Filter Element Retaining Lug for Accurate Cover Alignment
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Solution Overview
Problem
Existing air filter systems for motor vehicles face challenges in aligning and securing the cover with the filter element due to undefined installation positions and the need for precise alignment of locking elements, which can lead to space inefficiency and improper operation without the filter element.
Innovation Solution
A filter element design featuring a frame with a front wall and a retaining tab that engages with a retaining recess on the housing, ensuring correct alignment and secure fastening of the cover, while preventing accidental movement and allowing only proper operation when the filter element is installed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If locking elements are used to secure the cover to the filter element, then the cover can be firmly attached, but precise alignment is required which complicates the installation process
Solution Approach 1:
The filter element is pre-positioned in the housing before the cover is attached, establishing a defined installation position that automatically aligns the fastening elements. This preliminary positioning action eliminates the need for precise alignment during cover attachment, simplifying the installation process while maintaining secure fastening.
Solution Approach 2:
A retaining tab on the filter element acts as an intermediary component that engages with a retaining recess in the housing. This intermediary structure provides a mechanical reference point that guides and aligns the filter element and cover, facilitating easy assembly without requiring precise alignment of multiple locking elements.
2Adaptability or versatility
If the filter element has no defined installation position, then flexibility in assembly is maintained, but the cover cannot be properly aligned with locking elements
Solution Approach 1:
The filter element incorporates a retaining tab that engages with a retaining recess in the housing during assembly. This preliminary engagement action establishes a unique, defined installation position for the filter element, ensuring that subsequent components like the cover can be properly aligned with locking elements without compromising assembly flexibility.
3Ease of operation
If the cover can be attached without the filter element in place, then assembly is simplified, but improper operation and damage risk increase
Solution Approach 1:
The design requires the filter element to be positioned in the housing with its retaining tab engaged in the retaining recess before the cover can be attached. This preliminary requirement ensures the filter element is in place, preventing improper operation and damage risk while maintaining assembly simplicity through the guided alignment process.
Solution Approach 2:
The retaining tab and recess structure creates a mechanical constraint that prevents the cover from being attached unless the filter element is properly positioned. This preliminary anti-action against improper assembly sequences ensures operational reliability by making correct assembly the only viable path.
Data Source
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AI summary
The invention relates to a filter element (10) for an air-filter device of a motor vehicle, having a frame which surrounds a filter material (18) of the filter element (10) at least in some regions. The frame comprises a front wall (20), which extends perpendicularly in relation to a direction of insertion (22), in which the filter element (10) can be inserted into an accommodating space (14) of a housing (12) of the air-filter device. A front side (24) of the front wall (20) has arranged on it at least one fastening element (26), on which a cover of the air-filter device can be secured, the cover being designed to close the accommodating space (14). A panel-form main body of the front wall (20) has a narrow side, beyond which a retaining lug (76) of the filter element (10) projects, the retaining lug being formed separately from the at least one fastening element (26). Insertion of the retaining lug (76) into a retaining hollow (80), which is provided in the housing (12) of the air-filter device, allows the filter element (10) to be secured against movement in and/or counter to the direction of insertion (22). The invention also relates to an air-filter device having such a filter element (10).