Vehicle Cladding Mounting Arrangement with Segmented Ribs
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Solution Overview
Problem
Existing attachment structures for vehicle cladding can cause sink marks on the exterior surface, which are unsightly, and existing solutions either increase manufacturing costs or compromise the smoothness and paintability of the surface.
Innovation Solution
A cladding mounting arrangement featuring a retaining portion with a plurality of spaced apart ribs connecting it to the cladding body, allowing secure attachment without sink marks, maintaining a smooth and paintable exterior surface while avoiding high manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a molded-in or integral clip or attachment structure is incorporated into the cladding for securing to the vehicle body, then the attachment strength is improved, but sink marks appear on the exterior surface of the cladding
Solution Approach 1:
The attachment structure is segmented into multiple ribs instead of a single integral clip. These ribs are spaced apart and extend through the cladding to engage with the vehicle body, distributing the attachment function across multiple discrete elements. This segmentation prevents the formation of sink marks while maintaining attachment strength.
Solution Approach 2:
The exterior surface of the cladding is designed with different local qualities: the areas where ribs engage with the vehicle body have through-holes for attachment, while the remaining exterior surface maintains a smooth, continuous appearance suitable for painting. This local differentiation allows the attachment function to be performed without compromising the overall surface quality.
2Reliability
If a separate clip is used with a doghouse structure for attaching the cladding to the vehicle body, then the attachment reliability is improved, but manufacturing costs increase
Solution Approach 1:
The attachment structure is merged with the cladding body by forming ribs that extend directly from the cladding panels. This integration eliminates the need for separate clips and doghouse structures, reducing the number of parts and assembly steps while maintaining reliable attachment through the rib-vehicle body engagement.
Solution Approach 2:
The ribs serve multiple functions: they provide structural support for the cladding, create engagement points with the vehicle body, and define the attachment geometry without requiring additional components. This multi-functionality reduces manufacturing complexity and cost while ensuring reliable attachment.
3Manufacturing precision
If the cladding is provided with a textured exterior surface to disguise sink marks, then the appearance quality is improved, but the surface is no longer suitable for painting applications
Solution Approach 1:
Instead of modifying the surface texture to hide defects, the invention inverts the approach by designing the attachment structure to prevent defect formation in the first place. The smooth exterior surface is maintained as the primary design, and the attachment function is achieved through the rib structure that engages with the vehicle body through apertures, eliminating sink marks without requiring surface texturing.
Data Source
AI summary
A mounting arrangement for securing a cladding to a vehicle body includes a vehicle body defining at least one aperture and a cladding having a body portion and at least one integral attachment structure extending from the body portion. The attachment structure includes a retaining portion received through the at least one aperture for securing the body portion to the vehicle body and a plurality of spaced apart ribs connecting the retaining portion to the body portion.