Active Dynamic Vibration Absorber Yoke Assembly
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Solution Overview
Problem
Existing active dynamic vibration absorber systems for vehicles are inefficient in attenuating vibrations due to the dispersal of inertial force across multiple leaf springs, which complicates the structure and increases manufacturing costs.
Innovation Solution
A simplified structure featuring a yoke assembly with upper and lower protrusions fastened to the center of springs, allowing efficient up/down vibration, increased weight for enhanced excitation force, and integration of springs to reduce parts and manufacturing costs, with a coil unit and magnetic substance to generate controlled vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple leaf springs are attached to the edges of the yoke assembly, then the vibration attenuation capability is improved, but the inertial force disperses and the structure becomes more complex
Solution Approach 1:
The patent merges multiple separate leaf spring attachments into a single integrated spring assembly that connects to the yoke assembly at one location. This consolidation maintains the vibration attenuation function while eliminating the structural complexity and inertial force dispersion caused by multiple separate attachments at the edges.
2Reliability
If multiple leaf springs are attached to the yoke assembly, then vibration support is improved, but the number of parts increases and manufacturing cost increases
Solution Approach 1:
The patent combines multiple leaf springs into a single integrated spring assembly that provides equivalent or superior vibration support. This merging reduces the total number of parts, simplifies assembly procedures, and lowers manufacturing costs while maintaining the necessary vibration support functionality.
3Force
If the yoke assembly is made heavier to increase excitation force, then vibration generation capability is improved, but the overall system weight increases
Solution Approach 1:
The patent employs composite material construction for the yoke assembly, combining materials with high density and high strength-to-weight ratio. This allows the assembly to generate sufficient excitation force through controlled vibration while minimizing the overall weight increase, as the composite structure provides both the necessary mass concentration and structural integrity.
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 enhances vibration attenuation efficiency, increases excitation force, simplifies assembly, and reduces manufacturing costs by focusing the inertial force and integrating spring components.
Implementation Method 1
a coil unit and magnetic substance to generate controlled vibrations
Implementation Method 2
an upper spring and a lower spring... which may be plates arranged in parallel, and selectively vibrates up/down
Data Source
AI summary
An active dynamic vibration absorber apparatus for a vehicle that may be mounted to a frame of the vehicle and vibrates when power may be supplied to attenuate vibration of the vehicle, may include a housing, an upper spring and a lower spring, and a yoke assembly disposed between the upper spring and the lower spring which may be plates arranged in parallel, and selectively vibrates up/down in the housing, wherein the yoke assembly has an upper protrusion and a lower protrusion that protrude from the top and the bottom thereof, respectively, the upper protrusion being fastened to the center of the upper spring through the housing, and the lower protrusion being fastened to the center of the lower spring in the housing.