Motor Vehicle Door Securing Grommet for Bowden Cable Sealing
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Solution Overview
Problem
Existing securing arrangements on motor vehicle doors fail to adequately seal mechanical transmission elements, such as Bowden cables, against water, dust, and contaminants, leading to potential failure and malfunction.
Innovation Solution
A grommet with a sealing element, either as a sealing cap or O-ring, is integrated over or within the mechanical transmission element to prevent ingress of water, dust, and contaminants, ensuring proper sealing and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cable pull (Bowden cable) is used as the mechanical transmission element, then flexibility and ease of installation are improved, but sealing against water and contaminants becomes difficult to achieve
Solution Approach 1:
A flexible membrane seal (Feinmembrandichtung) is introduced to seal the cable pull penetration through the door panel. This thin film barrier effectively prevents water and contaminants from entering the cable pull while maintaining the flexibility needed for installation and operation.
Solution Approach 2:
A sealing element (Dichtungselement) is introduced as an intermediary component between the cable pull and the door panel interior. This mediator component specifically addresses the sealing problem at the penetration point without affecting the cable pull's flexibility or installation ease.
2Reliability
If the sealing element is integrated into the door opening assembly, then sealing effectiveness is improved, but assembly complexity increases
Solution Approach 1:
The sealing element is combined with the grommet (Gummibuffer) that already serves as a mechanical guide and protective element for the actuating element. By merging the sealing function with the existing structural component, the number of separate parts is reduced while achieving effective sealing.
Solution Approach 2:
The grommet is designed to serve multiple functions: mechanical guidance of the actuating element, protection against damage, and sealing against water and contaminants. This multi-functionality reduces assembly complexity by eliminating the need for separate sealing components.
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
The sealing solution effectively prevents the entry of water, dust, and contaminants into the transmission element, maintaining its functionality over time and simplifying assembly.
Implementation Method 1
an additional sealing element (8, 9) is provided in the region of the door opening (2)... the sealing element (8, 9) is provided on and/or in a grommet (10) engaging over the mechanical transmission element (5, 6)... effectively prevents the entry of water, dust, and contaminants into the transmission element
Data Source
AI summary
A securing arrangement on a motor vehicle door, which is equipped with an actuating element, in particular a securing button, and with a mechanical transmission element for acting upon, for example, a motor vehicle latch. The actuating element penetrates a door opening and is coupled to the transmission element. In addition, an additional sealing element is provided in the region of the door opening. According to the invention, the sealing element is provided on/or in a grommet engaging over the mechanical transmission element.