Vehicle Mounting Assembly with Automatic Decoupling Tensioning Element
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Solution Overview
Problem
Screwed components in vehicles can cause unwanted blocking and high load peaks during accidents, potentially damaging safety-critical components and posing risks to occupants.
Innovation Solution
A fastening arrangement featuring a clamping element with tensioning elements, such as wedges, that automatically loosen the fastening in the event of an external force, reducing the rigidity of the component attachment and minimizing load peaks by decoupling the component from the vehicle body during accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screwed fastening means is used to attach component to vehicle body, then fastening strength and rigidity are improved, but load peaks and damage risk to safety-critical components increase during accidents
Solution Approach 1:
The fastening system transitions from a static rigid connection to a dynamic system that adapts its rigidity based on external forces. The tensioning element (spring or damper) allows the fastening strength to vary automatically - maintaining strong attachment during normal operation but automatically reducing clamping force when accident loads are detected, thereby reducing load peaks on safety-critical components
Solution Approach 2:
The invention changes the physical state and mechanical properties of the fastening system by introducing elastic or damping characteristics through the tensioning element. This transforms the fastening means from a purely rigid mechanical connection to a system with energy-absorbing properties, enabling automatic parameter adjustment (clamping force) in response to external acceleration forces during accidents
2Stability of the object's composition
If rigid screwed connection is used, then structural stability is improved, but unwanted blocking occurs during accidents
Solution Approach 1:
The fastening system incorporates dynamic elements (springs or dampers) that enable automatic adaptation between stable rigid connection during normal use and controlled decoupling during accidents. The tensioning element's elastic or damping properties allow the system to maintain structural stability when needed while preventing blocking by automatically reducing clamping force when external forces indicate an accident scenario
3Reliability
If tensioning element with play is used to allow decoupling, then accident safety is improved, but fastening precision and reliability may be reduced
Solution Approach 1:
The invention introduces controlled parameter variations through the tensioning element's play or clearance. This deliberate design feature allows the fastening system to transition between two distinct states: a precise rigid connection during normal operation and a controlled decoupled state during accidents. The play in the tensioning element enables automatic state transition based on external forces while maintaining manufacturing precision through defined geometric clearances
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 effectively reduces the occurrence of load peaks and damage to vehicle components by allowing the component to decouple from the body during accidents, while maintaining sufficient rigidity for normal vehicle operation, enabling lighter and less rigid body parts.
Implementation Method 1
the tensioning element automatically changes into an accident state when an external force is applied, in which the tensioning element loosens the fastening of the component
Implementation Method 2
the clamping element fastening the component in a normal state reinforced via the fastening means
Data Source
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AI summary
A fastening arrangement of a component (1) in a vehicle, comprising the component (1), a load-bearing component (2) of the vehicle and at least one fastening means (3), wherein the component (1) is fastened to the load-bearing component (2) of the vehicle by means of the at least one fastening means (3), wherein the fastening means (3) has a tensioning element (4.1, 4.2), wherein the tensioning element (4.1, 4.2) in a normal state reinforces the fastening of the component (1) via the fastening means (3), wherein the tensioning element (4.1, 4.2) automatically transitions into an accident state when an external force (F) is applied, in which the tensioning element (4.1, 4.2) loosens the fastening of the component (1) via the fastening means (3).