Liquid-Sealed Vibration Damping Device With Variable Rigidity Connector
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Solution Overview
Problem
Existing liquid-sealed vibration damping devices face challenges in achieving a uniform interference margin in the circumferential direction due to variations in rigidity, particularly when the outer cylindrical member has a quadrangular shape, affecting assembly and sealing properties.
Innovation Solution
The design incorporates a cylindrical second mounting member with a connector featuring engaging parts and elastic hook parts of varying rigidity, where the elastic hook parts on the main frame have higher rigidity and those on the corners have lower rigidity, allowing for uniform rigidity in the circumferential direction, facilitating assembly and improving sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the outer cylindrical member is formed to have a substantially quadrangular shape in a plan view to save space, then space efficiency is improved, but the rigidity becomes non-uniform in the circumferential direction causing difficulty in making an uniform interference margin
Solution Approach 1:
The elastic hook parts are designed with different rigidity characteristics at different locations: those on main frame parts have higher rigidity while those on corner parts have lower rigidity. This local differentiation compensates for the non-uniform rigidity of the quadrangular outer cylindrical member, enabling uniform interference margin throughout the circumferential direction.
2Strength
If the outer cylindrical member has corners with high rigidity and linear sections with lower rigidity, then structural strength is improved, but the interference margin cannot be made uniform in the circumferential direction
Solution Approach 1:
The connector is designed with elastic hook parts that have location-dependent rigidity: higher rigidity on main frame parts and lower rigidity on corner parts. This local quality differentiation allows the connector to compensate for the inherent rigidity non-uniformity of the quadrangular outer cylindrical member, achieving uniform interference margin while preserving the structural strength benefits of the corner design.
3Strength
If engaging parts with rigid connections are used to assemble the first and second frames, then connection strength is improved, but the assembling property deteriorates due to difficulty in achieving uniform interference margin
Solution Approach 1:
The connector uses elastic hook parts with varying rigidity parameters at different locations rather than a uniform rigid connection. This parameter change allows the connection to accommodate the non-uniform rigidity of the quadrangular outer cylindrical member, achieving both adequate connection strength and improved assembling property through uniform interference margin.
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 ensures a substantially uniform interference margin in the circumferential direction, enhancing the assembling and sealing properties of the liquid-sealed vibration damping device.
Implementation Method 1
elastic hook parts that are arranged on the other one of the first and second frames to engage with the engaging parts
Data Source
AI summary
A liquid-sealed vibration damping device is provided that allows an outer cylindrical member to have a substantially uniform interference margin in the circumferential direction, while improving an assembling property. A second mounting member mounted on a non-vibration source includes: a first frame in a cylindrical shape that is connected to a lower portion of an insulator; a second frame in a cylindrical shape that holds a partition member arranged below the insulator; and a connector that connects the first frame with the second frame. The connector includes: engaging parts that are arranged on the first frame; and elastic hook parts that are arranged on the second frame. The elastic hook parts are arranged at intervals on each of main frame parts in the circumferential direction thereof, and the elastic hook parts arranged on corners have lower rigidity than those arranged on the main frame parts.