Stretchable Wheel-Rim Sound Absorbing Assembly Under Centrifugal Load
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Solution Overview
Problem
The existing sound absorbing tool with a stainless steel backplane is prone to breaking due to high rigidity and centrifugal forces during vehicle operation, leading to durability issues.
Innovation Solution
A sound absorbing tool featuring an endless, stretchable housing body with different stretchability in various directions, housing a shapeless sound absorbing material that deforms to absorb load and maintain stability on a wheel rim, enhancing durability and sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a stainless steel backplane is used to provide structural support, then the structural strength is improved, but the durability deteriorates due to high rigidity causing locking portions to break under centrifugal force
Solution Approach 1:
The patent replaces the rigid stainless steel backplane with a flexible fabric backplane that can elastically deform under centrifugal force during vehicle operation. This flexible backplane maintains the structural support function while accommodating the dynamic loads without breaking, thereby resolving the contradiction between strength and durability. The fabric construction allows the locking portions to flex rather than fracture under stress.
Solution Approach 2:
The patent changes the physical parameters of the backplane material from rigid metal to flexible fabric, fundamentally altering the mechanical properties. This parameter change enables the backplane to transition from a brittle failure mode (breaking under centrifugal force) to a ductile response (elastic deformation), thus improving durability while maintaining sufficient structural strength for sound absorption support.
2Stability of the object's composition
If a rigid backplane is used to maintain shape, then the structural stability is improved, but the durability worsens due to increased load on locking portions during vehicle running
Solution Approach 1:
The patent transitions from a static, rigid backplane structure to a dynamic, flexible fabric structure that can adapt its shape and tension in response to centrifugal forces during vehicle operation. The fabric backplane dynamically adjusts its configuration under load, distributing stresses more evenly and preventing concentration at the locking portions, thereby maintaining structural stability while improving durability.
3Reliability
If the backplane is made stretchable to absorb centrifugal force, then the durability is improved, but the structural rigidity deteriorates
Solution Approach 1:
The fabric backplane provides controlled flexibility that allows stretchability to absorb centrifugal force while maintaining sufficient structural rigidity through the tensioning of the fabric weave and the overall geometric configuration. The fabric structure achieves an optimal balance between flexibility for durability and rigidity for structural support.
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 tool increases durability and sound absorption performance by elongating and deforming to absorb centrifugal forces, maintaining stability and reducing resonance noise during vehicle operation.
Implementation Method 1
an endless housing body (10) that internally defines a housing space (10a) and is stretchable in a circumferential direction (B)
Data Source
AI summary
A sound absorbing tool according to this disclosure includes: an endless housing body that internally defines a housing space and is stretchable in a circumferential direction; and a shapeless sound absorbing material that is housed in the housing space of the housing body.