Elastomer-Spring Mounting Assembly for Vehicle NVH Isolation
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Solution Overview
Problem
Existing vehicle systems experience noise and vibration issues during operation, leading to rapid component degradation and negative consumer perception, despite existing dampening technologies.
Innovation Solution
A vibration isolating damper system comprising an elastomeric primary isolator with a tubular body, shoulder, rigid tube, and coil spring, designed to secure a first structure to a second structure, limiting vibration transmission while using a PVC-coated coil spring for specific damping characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional dampening components and techniques are used, then noise and vibration are mitigated to some extent, but component degradation occurs more rapidly and vehicle quality perception remains negative
Solution Approach 1:
The invention uses a composite structure combining elastomeric material (primary isolator) with metal components (coil spring, rigid tube, fastener). The elastomeric material provides vibration isolation while the metal components provide structural support and damping, creating a synergistic effect that reduces noise and vibration without compromising component reliability
Solution Approach 2:
The design nests multiple components within each other: the coil spring is disposed about the rigid tube, the primary isolator surrounds the fastener rod portion, and the inner tubular portion is nested within the tubular body. This nested arrangement maximizes space utilization and allows each component to perform its damping function independently while working together as a unified system
2Object-affected harmful factors
If multiple dampening components are combined, then vibration isolation effectiveness is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple dampening functions into a single integrated assembly. The primary isolator, coil spring, rigid tube, and fastener are combined into one unit that provides both isolation and damping functions, reducing the need for separate components while maintaining effectiveness
Solution Approach 2:
The fastener serves multiple functions: it secures the first structure to the second structure, provides a mounting point for the coil spring, and acts as a central axis for the entire assembly. The rigid tube both supports the coil spring and provides structural rigidity, eliminating the need for separate support and structural elements
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 system effectively reduces noise, vibration, and harshness (NVH) by limiting vibration transmission between the components, enhancing the effectiveness of the solution by using PVC-coated coil springs to improve damping characteristics, thereby reducing the noise and vibration issues in vehicles.
Implementation Method 1
a primary isolator of elastomeric material configured to engage the first structure for securement thereto
Implementation Method 2
limiting transmission of vibration therebetween
Implementation Method 3
a coil spring disposed about the rigid tube and engaging the shoulder of the primary isolator within the tubular body
Implementation Method 4
The primary isolator, the shoulder and the tubular body, together, define a pocket for receiving an upper end of the coil spring to locate the coil spring coaxial with and spaced apart from the rigid tube
Implementation Method 5
using a PVC-coated coil spring for specific damping characteristics
Data Source
Figure 1A
Figure 1B~1C
Figure 2~3
AI summary
A vibration isolating damper for securing a first structure to a second structure includes a primary isolator of elastomeric material configured to engage the first structure for securement thereto and including a tubular body and a shoulder adjacent to an axial end of the tubular body, the shoulder extending radially inwardly to partially close the axial end of the tubular body. The vibration isolating damper also includes a fastener having a rod portion extending through the tubular body of the primary isolator and configured for securement to the second structure; a rigid tube disposed about the rod portion of the fastener and extending through the tubular body of the primary isolator; and a coil spring disposed about the rigid tube and engaging the shoulder of the primary isolator within the tubular body.