Decoupling Device Tabs for Shielding Part Fastening

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Solution Overview

Problem

Existing fastening devices for decoupling devices require excessive installation work and material folds near the hole rim of shielding parts, leading to potential corrosion and inefficiencies.

Innovation Solution

A fastening device with radially protruding tabs on a bridge element that connects the decoupling device to the shielding part, utilizing a force fit between tabs to immobilize the bridge element, reducing the number of components and installation steps, and allowing for a simpler, more efficient attachment process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a separate fastener is used to connect the bridge element to the shielding part, then the fastening connection is secure, but the installation work increases and the device complexity increases

Engineering Contradiction:

Improvefastening connection strengthVSAvoidnumber of components

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The fastening function is merged with the bridge element by integrating tabs directly into the bridge element structure. The tabs are formed as an integral part of the bridge element from the same sheet metal, eliminating the need for separate fasteners while maintaining secure fastening connection through the force fit mechanism between tabs and hole rim

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bridge element is designed to serve multiple functions: it provides vibration decoupling between the bushing and shielding part, and simultaneously serves as the fastening device through its integrated tabs. This multi-functionality reduces the total number of components needed in the assembly

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Strength

If a separate fastener is used to connect the bridge element to the shielding part, then the fastening connection is secure, but the installation steps increase

Engineering Contradiction:

Improvefastening connection strengthVSAvoidinstallation time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The tabs are pre-formed as integral parts of the bridge element during manufacturing, positioned and shaped in advance to engage with the hole rim. This preliminary preparation eliminates the need for separate fastener attachment steps during installation, reducing installation time while maintaining secure connection

Inventive Principle:

Principle #10Preliminary action

3Strength

If a traditional fastener with folded collar is used, then the fastening connection is achieved, but material folds occur that promote corrosion

Engineering Contradiction:

Improvefastening connection strengthVSAvoidcorrosion susceptibility

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The folded collar structure that creates material folds and corrosion risk is extracted and replaced with a tab-based force fit mechanism. The tabs engage with the hole rim through elastic deformation and friction without requiring material folding, thereby eliminating the corrosion-promoting folds while maintaining fastening strength

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The tabs are designed as simple, inexpensive sheet metal elements that achieve fastening through elastic deformation rather than permanent material folding. This approach creates a corrosion-resistant connection that is easier to manufacture and install

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 reduces installation complexity, minimizes material usage, and prevents corrosion by using a force fit between tabs, ensuring secure and efficient vibration-decoupling and fastening functions while reducing material folds and installation steps.

Implementation Method 1

a remainder of at least two tabs is provided to rest against an opposite second outside of the shielding part and the hole rim can be immobilized with a force fit between the tabs of the first subset and the tabs of the remainder

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

the hole rim can be immobilized with a force fit between the tabs of the first subset and the tabs of the remainder

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 3

in order to achieve the vibration-decoupling connection of a bushing to the shielding part, the decoupling device has at least one bridge element

Methodology Applied

Scientific EffectVibration damping: Damping

Data Source

PatentUS10974665B2Securing device for a decoupling device on a shielding part, decoupling device having the securing device, and shielding part having the decoupling device

Publication Date: 2021.04.13 ELRINGKLINGER AG

AI summary

A fastening device for fastening a decoupling device relative to a hole rim of a hole opening of a shielding part; to achieve the vibration-decoupling connection of a bushing to the shielding part, the decoupling device has at least one bridge element, which, at its radially outer edge, has fasteners for producing a fastening connection of the bridge element to the hole rim of the shielding part, wherein the fasteners comprise at least four tabs which, starting from the bridge element, protrude radially outward and a subset of at least two tabs of the bridge element is provided to rest against a first outside of the shielding part and a remainder of at least two tabs is provided to rest against an opposite second outside of the shielding part and the hole rim can be immobilized with a force fit relative to the decoupling device by means of the tabs of the subset and the tabs of the remainder.