Engine-Driven DC Supply Mount Layout for Vibration Isolation
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Solution Overview
Problem
Existing engine-driven-DC-supply units face challenges in reducing vibration transfer while maintaining the posture stability, as reducing support rigidity to minimize vibration transfer can lead to posture changes.
Innovation Solution
The engine-driven-DC-supply unit is configured with a base member and four elastic bodies supporting the engine and electric generator at specific points, where the distance between points along the crankshaft axis is greater than in the orthogonal direction, surrounding the barycenter, to enhance vibration reduction while preventing posture changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If support rigidity is reduced to minimize vibration transfer, then vibration transfer is reduced, but posture stability deteriorates
Solution Approach 1:
The patent applies local quality by configuring elastic bodies at specific locations around the barycenter with different orientations. Each elastic body is positioned and oriented to provide targeted vibration isolation in specific directions while maintaining overall posture stability through the collective arrangement that surrounds the barycenter.
Solution Approach 2:
The patent employs asymmetry in the configuration of elastic bodies, where the distance between points in the first direction (crankshaft axis direction) is greater than in the second direction. This asymmetric arrangement allows differential vibration isolation characteristics in different directions, optimizing both vibration reduction and posture stability.
2Object-generated harmful factors
If support rigidity is reduced to minimize vibration transfer, then vibration transfer is reduced, but structural support capability deteriorates
Solution Approach 1:
The patent changes the parameters of the support system by using elastic bodies with specific mechanical properties that provide different stiffness characteristics in different directions. The elastic bodies are configured to have lower stiffness in vibration-prone directions while maintaining sufficient stiffness for structural support, achieving a balance between vibration isolation and structural capability.
3Object-generated harmful factors
If elastic bodies are arranged with greater distance in crankshaft axis direction, then vibration reduction is enhanced, but device complexity increases
Solution Approach 1:
The patent segments the support function into multiple discrete elastic bodies positioned at specific points around the barycenter. This segmentation allows each elastic body to independently handle vibration isolation in its specific location and orientation, achieving comprehensive vibration reduction while maintaining a manageable structural configuration.
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 effectively reduces vibration transfer to the outside while maintaining the stability of the engine-driven-DC-supply unit's posture, achieving a balance between vibration reduction and structural support.
Implementation Method 1
a mount member and four elastic bodies, the mount member being connected to the base member and supporting the engine body and the electric generator through the four elastic bodies
Data Source
AI summary
An engine-driven-DC-supply unit, including: a main component supported by a base member; and a mount member connected to the base member and supporting an engine body and an electric generator of the main component through four elastic bodies. The engine-driven-DC-supply unit is configured to convert electric power generated by the electric generator driven by the engine body to DC power, and to supply the converted DC power to an external load device. The four elastic bodies are located at four points. A distance between any two of the four points located in a first direction, which is along an axis of a crankshaft of the engine body, is larger than a distance between any two of the four points located in a second direction that is orthogonal to the first direction. The four points surround a barycenter of the main component in a plan view.