Motor Vehicle Door Trim Strip Assembly With Integrated Retention Connection
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Solution Overview
Problem
Existing trim strip arrangements for motor vehicle doors require additional components and complex shaping, leading to increased assembly complexity, component count, and risk of gaps, as well as potential corrosion issues.
Innovation Solution
A frameless trim strip arrangement with a retention device featuring a connection component formed integrally on the retention device, eliminating the need for a separate stamped sheet metal component, allowing preassembly of the first trim strip and adjustable alignment with a second trim strip that extends over the window shaft, using a two-component element with a hard resin plastic and soft rubber components for secure and gap-free attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate stamped sheet metal component is used as a connection device, then a positive-locking connection between trim strips is achieved, but the number of components increases and assembly complexity increases
Solution Approach 1:
The connection device is integrated into the retention device by forming it as an integral extension of the hard component. This merging eliminates the separate stamped sheet metal component while maintaining the positive-locking connection function between the first and second trim strips through the connection component's engagement features
Solution Approach 2:
The retention device is designed to perform multiple functions: it retains the first trim strip to the door, provides a connection component for attaching the second trim strip, and ensures proper alignment. This multi-functionality eliminates the need for separate connection devices while maintaining reliable attachment
2Reliability
If a stamped sheet metal component is used for connection, then trim strips are secured, but corrosion problems occur
Solution Approach 1:
The retention device uses a two-component structure with a hard component (resin plastics material) and a soft component (rubber). This composite material approach provides secure attachment through the hard component's structural integrity and the soft component's flexibility, while avoiding the corrosion issues associated with stamped sheet metal
Solution Approach 2:
The material composition is changed from metal (prone to corrosion) to polymer-based materials (corrosion-resistant). The hard resin plastic provides structural strength while the rubber soft component provides flexibility and sealing, achieving secure attachment without corrosion
3Ease of manufacture
If additional milling operations and complex shaping cuts are performed, then trim strips are integrated into the door, but production time and costs increase
Solution Approach 1:
The first trim strip is pre-assembled with the retention device before mounting to the door. This preliminary assembly allows the connection component to be positioned and prepared in advance, simplifying the final installation and reducing on-site assembly time and complexity
4Ease of operation
If a separate connection device is used, then trim strips are aligned, but the risk of gap formation increases
Solution Approach 1:
The connection component is formed as an integral part of the retention device, creating a unified structure that eliminates gaps between separate components. This integration ensures continuous coverage and proper alignment of the trim strips without the gap risks associated with multiple separate parts
Data Source
AI summary
A trim strip arrangement for a motor vehicle door includes a first trim strip disposable below a mirror triangle of the motor vehicle door, a second trim strip which adjoins the first trim strip in a flush manner, a retention device, where an assembly of the first trim strip and the second trim strip is mountable on the motor vehicle door by the retention device, and a connection device which orientates the first trim strip and the second trim strip relative to each other. The connection device is in a form of a connection component which is formed integrally on the retention device.