Motor Vehicle Trunk Lid Flap Fastening Integration
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Solution Overview
Problem
Existing motor vehicle trunk lids have a high number of parts and weight, leading to complex assembly and increased weight, which complicates the movement of associated components like parcel shelves.
Innovation Solution
A flap design with a one-piece fastening element that protrudes through a receiving opening in the shell component, allowing the paneling part to be fixed securely via a form-fitting and force-fitting connection, reducing the number of parts and weight while enabling efficient force transfer during movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate parts (shell component, lining part, expanding nut, screw, fastening element) are used to attach the lining part to the shell component and secure the coupling element, then the attachment is secure and reliable, but the number of parts increases and weight increases and assembly becomes complex
Solution Approach 1:
The patent combines the fastening element and receiving element into a single integrated component. The receiving element is formed as one piece with the fastening element, eliminating the need for separate expanding nuts and screws. This merging reduces the number of parts while maintaining the secure attachment function through the integrated design that provides both the fastening mechanism and the receiving structure for the coupling element
Solution Approach 2:
The integrated fastening/receiving element serves multiple functions simultaneously: it attaches the lining part to the shell component, secures the coupling element, and provides structural support. This multi-functional design eliminates the need for separate dedicated components for each function, reducing overall part count while maintaining reliability
2Strength
If multiple separate parts (expanding nut, screw, fastening element) are used to secure the coupling element to the shell component, then the attachment can absorb high forces, but the weight of the assembly increases
Solution Approach 1:
The patent merges the fastening element and receiving element into a single integrated component, eliminating redundant material from separate parts like expanding nuts and screws. This integration maintains force absorption capability through the unified structural design while reducing the total weight of the assembly by removing unnecessary material and connection points
3Reliability
If multiple separate parts (screw, expanding nut, fastening element) are used to attach the lining part to the shell component, then the attachment is secure, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The integrated fastening/receiving element can be attached as a single component, eliminating the need for multi-step assembly processes involving separate screws, expanding nuts, and fastening elements. This reduces assembly complexity and time while maintaining secure attachment through the integrated design that provides all necessary fastening and receiving functions in one piece
Solution Approach 2:
The receiving element is pre-formed with the appropriate geometry to receive and secure the coupling element, eliminating the need for separate fastening operations. The integrated design allows the component to be prepared in advance with built-in securing features, simplifying the overall assembly process while ensuring reliable attachment
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a lid (10) for a motor vehicle, having at least one body shell part (12), having at least one trim part (14, 28) which is held on the body shell part (12) and by means of which the body shell part (12) is covered at least in regions, and having at least one fastening element (20, 32) which is arranged on the trim part (14, 28) and to which a coupling element can be fastened, via which a covering element of the motor vehicle can be moved together with the lid (10) during a movement of the latter, wherein the trim part (28) comprises at least one receiving element (38) which penetrates a corresponding receiving opening (40) of the body shell part (12) and in which the integral fastening element (32) which penetrates the receiving opening (40) is received at least partially with fixing of the trim part (28) on the body shell part (12) via the receiving element (38).