Window Channel Sealing Profile With Expansion Fastening Accuracy
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Solution Overview
Problem
Sealing profiles for motor vehicles lack positional accuracy during fastening due to tolerances in through holes, leading to an insecure and imprecise attachment.
Innovation Solution
The fastening portion features two projecting fastening members with a receptacle for an expansion element, allowing the members to deform and securely brace against a through hole, ensuring a play-free and positionally accurate fixation, both transversely and longitudinally, with optional positive-locking features for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through holes are used for fastening the sealing profile, then the fastening process is simple, but the positional accuracy deteriorates due to tolerance accumulation
Solution Approach 1:
The invention changes the parameter of the fastening system from rigid through-holes to flexible expansion elements that can adapt their shape and size. The expansion element transforms from a compact state during insertion to an expanded state during fastening, allowing it to compensate for dimensional tolerances in the through-holes and achieve precise positioning while maintaining simple fastening process
Solution Approach 2:
The invention introduces dynamic characteristics to the fastening system by using expansion elements that can change their physical state. The fastening members transition from a compressed state during insertion to an expanded state during fastening, enabling the system to adapt to tolerance variations and achieve both simple installation and high positional accuracy
2Ease of operation
If larger through holes are designed to accommodate tolerance variations, then ease of assembly is improved, but positional accuracy deteriorates
Solution Approach 1:
The expansion element changes its dimensional parameters from a compact insertion size to an expanded fastening size. This parameter transformation allows the through-holes to be designed with larger dimensions for easy assembly, while the expansion element compensates for the resulting gaps to achieve precise positional accuracy during fastening
3Manufacturing precision
If expansion elements are used to compensate for tolerance variations, then positional accuracy is improved, but device complexity increases
Solution Approach 1:
The invention divides the fastening system into separate functional components: the fastening members embedded in the sealing profile and the expansion elements inserted into the through-holes. This segmentation allows each component to be optimized independently while working together to achieve positional accuracy without significantly increasing overall system complexity
Solution Approach 2:
The expansion element acts as an intermediary between the fastening members and the through-holes. It mediates the tolerance variations by expanding to fill the gap, thereby achieving positional accuracy while keeping the fastening structure relatively simple through a single intermediate component
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables simple, accurate, and secure fastening of the sealing profile, providing improved sealing properties and theft protection while maintaining a visually appealing and concealed expansion element.
Implementation Method 1
the fastening members are deformed outward and can be braced, for example, with respect to a through hole in a motor vehicle
Data Source
AI summary
A sealing profile for a motor vehicle, in particular for a window channel of a motor vehicle, including a sealing portion and a fastening portion, a sealing arrangement having such a sealing profile, and a fastening method. The fastening portion has at least two protruding fastening members, between which a receiving portion for an expansion element is arranged.