Two-Part Fastening Arrangement for Easier Panel Preassembly
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Solution Overview
Problem
The conventional fastening arrangements with a single-piece elastomer profile part for connecting bolt-on parts to vehicle panels are complex and cumbersome, particularly in preassembly processes, and often require multiple elements.
Innovation Solution
A two-component fastening element with an elastomer profile part comprising a disk element and a fastening element, where the disk element is axially movable, allowing for easier preassembly and adaptable to different panel thicknesses, and a retaining device for secure attachment during final assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-piece elastomer profile part is used, then the structure is simple, but the preassembly process becomes complex and cumbersome
Solution Approach 1:
The elastomer profile part is divided into two separate components: an elastomer body and a disk element. The disk element can be preassembled onto the retaining foot independently, and then the elastomer body is mounted onto the disk element. This segmentation simplifies the preassembly process by allowing each component to be prepared separately before final assembly.
2Ease of manufacture
If the groove width is fixed in a single-piece elastomer profile part, then manufacturing is simpler, but adaptability to different panel thicknesses is reduced
Solution Approach 1:
The disk element is designed to be axially movable relative to the elastomer body through an axial guide with axial motion clearance. This dynamic configuration allows the groove width to be adjusted by moving the disk element axially, enabling adaptation to different panel thicknesses while maintaining a relatively simple manufacturing process for each individual component.
3Adaptability or versatility
If multiple elements are used for fastening, then adaptability is improved, but device complexity increases
Solution Approach 1:
The elastomer body and disk element are combined into a integrated elastomer profile part where the disk element is mounted on the elastomer body. This merging provides the adaptability of multiple components while maintaining a unified structure that functions as a single fastening unit, reducing the overall number of separate elements needed.
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
Simplifies the preassembly process, enhances assembly robustness, and ensures reliable attachment with adjustable clamping force, facilitating easier handling and transportation of modular units.
Implementation Method 1
the head section presses the elastomer profile part against the panel, creating an elastic preloading
Implementation Method 2
the disk element is supported on the element shank by means of an axial guide so as to be movable through an axial motion clearance
Data Source
AI summary
A fastening arrangement having a fastening element for elastically connecting a bolt-on part to a support part. The fastening element has a head section (7) that transitions into an element shank. An elastomer profile part with a retaining groove which is open radially to the outside, into which a retaining foot of the bolt-on part can engage, is arranged on the underside of the head section. The retaining groove is designed with a groove wall on the head side and a groove wall on the shank side. The elastomer profile part is constructed in at least two parts from an elastomer body arranged on the head section of the fastening element and from a disk element that has at least the shank-side groove wall of the retaining groove. The disk element is also composed of two components, namely the elastomer profile part and the hard component.