Motor Vehicle Lighting Fan Mount With 3-Axis Vibration Damping
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Solution Overview
Problem
Existing fans for motor vehicle lighting devices transmit vibrations from the frame to the housing, leading to undesirable noise generation, particularly in electric vehicles with minimal engine noise.
Innovation Solution
The frame is form-lockingly fastened to the housing using compliance elements that provide elastic flexibility along three spatial axes, absorbing vibrational excitations and damping noise without rigid screw joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid screw joints are used to attach the frame to the housing, then the attachment is robust and stable, but vibrations are transmitted from the frame to the housing, causing undesirable noise
Solution Approach 1:
The patent introduces compliance elements as intermediary components between the frame and housing. These elements act as mediators that decouple the rigid connection, allowing the frame to be securely attached while preventing vibration transmission. The compliance elements absorb mechanical vibrations through their elastic properties, thus eliminating the noise problem while maintaining attachment stability.
Solution Approach 2:
The patent changes the mechanical parameters of the connection by transitioning from rigid screw joints to elastic compliance elements. This parameter change allows the connection to maintain stability through elastic deformation while simultaneously reducing vibration transmission. The compliance elements have specific elastic moduli and geometric parameters designed to optimize both attachment strength and vibration damping.
2Object-generated harmful factors
If compliance elements are used to damp vibrations, then noise is reduced, but the attachment robustness may be compromised
Solution Approach 1:
The compliance elements are designed as composite structures combining materials with different mechanical properties. This allows the elements to provide both elastic compliance for vibration damping and sufficient strength for robust attachment. The composite design enables the connection to exhibit both softness for vibration absorption and hardness for structural integrity.
3Object-generated harmful factors
If multiple compliance elements are used to damp vibrations along three spatial axes, then vibration damping is improved, but device complexity increases
Solution Approach 1:
The compliance elements are designed to perform multiple functions simultaneously: they provide attachment, damp vibrations in multiple directions, and maintain positional stability. Each compliance element is a multi-functional component that replaces several separate components, thereby reducing overall device complexity while achieving comprehensive vibration damping along three spatial axes.
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
Significantly suppresses noise generation by dissipating vibrations as mechanical work for elastic deformation of compliance elements, ensuring robust fixation and quiet operation.
Implementation Method 1
compliance elements, which are in pre-loaded contact with the frame, and which are designed for damping of vibrations of the frame along three spatial axes... dissipating vibrations as mechanical work for elastic deformation of compliance elements
Implementation Method 2
designed for damping of vibrations of the frame... dissipating vibrations as mechanical work for elastic deformation of compliance elements
Data Source
Figure 1a~1b
Figure 1c
Figure 2a~2b
AI summary
The invention relates to a fan (100) for a lighting device of a motor vehicle, at least comprising an impeller (1), a frame (2), and a housing (3), wherein the impeller (1) is rotatably mounted on the frame (2), and wherein the housing is mountable on the lighting device. According to the invention the frame (2) is form-lockingly fastened to the housing (3), wherein the housing (3) features compliance elements (31, 32, 33), which are in preloaded contact with the frame (2), and which are designed for robust fixing of the fan and damping of vibrations of the frame (2) along three spatial axes (X, Y, Z).