Instrument Panel Mounting Structure Using Air Duct Vibration Damping
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Solution Overview
Problem
Existing vehicle communication devices mounted on instrument panels experience significant vibration-induced loads due to vehicle travel, which can damage the panel and the device.
Innovation Solution
The vehicle communication device is mounted inside the instrument panel and connected to an air conditioning duct, with the duct acting as a dynamic damper to absorb vibrations, and an elastically deformable member is interposed to enhance vibration absorption, aligning resonance frequencies and adjusting for temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vehicle communication device is directly mounted on the instrument panel, then the mounting structure is simple, but vibration-induced loads damage the panel and device
Solution Approach 1:
The air conditioning duct serves as an intermediary component between the instrument panel and the vehicle communication device. The duct absorbs vibrations through its elastic deformation, preventing direct transmission of vibration-induced loads to the device and panel, thus resolving the contradiction between simple mounting structure and vibration resistance
Solution Approach 2:
The patent utilizes the elastic properties of the air conditioning duct material, allowing it to deform under vibration and return to its original shape. This parameter change (elastic deformation) enables the duct to absorb vibration energy, protecting the mounted device while maintaining a relatively simple mounting structure
2Reliability
If an elastic member is added between the device and duct, then vibration absorption is enhanced, but the mounting structure becomes more complex
Solution Approach 1:
The elastic member is integrated into the existing air conditioning duct structure, merging the vibration absorption function with the already-present duct component. This combination approach enhances vibration absorption capabilities while minimizing the increase in overall structural complexity, as the elastic member becomes part of the existing system rather than a separate additive component
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
This configuration reduces vibration-induced loads on the instrument panel and communication device, maintaining the duct's damping function across temperature variations.
Implementation Method 1
the air conditioning duct functions as a dynamic damper. It is therefore possible to reduce vibration that occurs in an up-down direction in the vehicle communication device and the portion of the instrument panel on which the vehicle communication device is mounted
Implementation Method 2
an elastically deformable elastic member may be interposed between the vehicle communication device and the connection portion... the elastic member can absorb vibration that occurs in the up-down direction
Implementation Method 3
a spring constant of the elastic member may be set in such a manner that a resonance frequency of the instrument panel and the vehicle communication device in response to a road surface input to a vehicle coincides with a resonance frequency of the air conditioning duct
Data Source
AI summary
A mounting structure for a vehicle communication device includes an instrument panel, a vehicle communication device, and an air conditioning duct. The vehicle communication device is disposed inside the instrument panel and mounted on the instrument panel. The air conditioning duct is part of a vehicle air conditioner and includes a connection portion connected to the vehicle communication device. A portion of the air conditioning duct different from the connection portion is fixed to, and supported by, the instrument panel.