Decoupling Fastener Assembly for Tool-Free Vehicle Mounting
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Solution Overview
Problem
Conventional decoupling elements for add-on parts in motor vehicles require additional manufacturing time and tools for assembly, and they often necessitate the use of multiple components like spacers, washers, and nuts, which complicates the assembly process and increases noise emission during engine operation.
Innovation Solution
A fastening structure comprising thermoplastic components with cylinder wall segments and spring elements that can be easily assembled by plugging onto a threaded bolt without the need for screwing, using a decoupling element made of elastomer to provide vibration decoupling and noise damping, thereby reducing the complexity and time required for assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional decoupling elements are assembled using multiple components (spacers, washers, nuts), then the fastening function is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent combines multiple separate components (spacer, washer, nut) into a single integrated fastening element. The fastening element includes an integrally formed spacer portion and fastening portion, eliminating the need for separate assembly steps and reducing overall complexity while maintaining the decoupling and fastening functions.
Solution Approach 2:
The fastening element serves multiple functions simultaneously: it provides vibration decoupling through the elastomeric spacer portion, structural support through the rigid fastening portion, and thread engagement through the integrated nut. This multi-functionality replaces several specialized components with one universal element.
2Reliability
If conventional decoupling elements are assembled with multiple components, then the fastening function is achieved, but additional tools and manufacturing time are required
Solution Approach 1:
By merging the spacer, washer, and nut into a single fastening element, the patent eliminates the need for multiple assembly operations and tools. The integrated design allows for single-step installation, directly improving assembly speed and productivity.
Solution Approach 2:
The fastening element is pre-assembled as a complete unit during manufacturing, with all components permanently integrated. This preliminary action transfers the assembly complexity from the production line to the manufacturing stage, enabling rapid installation without requiring additional tools or steps during vehicle assembly.
3Reliability
If conventional decoupling elements use multiple separate components, then the decoupling function is achieved, but noise emission during operation increases
Solution Approach 1:
The integration of the elastomeric spacer portion directly connected to the rigid fastening portion creates a continuous vibration-damping path. This merged structure reduces gaps and connection points where vibrations could amplify, thereby reducing noise emission while maintaining effective vibration decoupling.
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 solution simplifies the assembly process by eliminating the need for additional components like spacers and washers, reduces manufacturing time, and effectively decouples vibrations and noise, while ensuring secure attachment to the vehicle body structure.
Implementation Method 1
The spring elements are configured to engage in thread flanks of the threaded bolt when a threaded bolt is introduced into the opening
Implementation Method 2
a decoupling element made of elastomer to provide vibration decoupling and noise damping
Implementation Method 3
a decoupling element made of elastomer
Data Source
AI summary
A fastening element and a decoupling assembly, the fastening element for add-on parts connected to a body structure of a motor vehicle, a method for producing the de-coupling assembly and assembling it.