Orifice-Forming Member Weight Reduction via Segmented Liquid Storage
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Solution Overview
Problem
Existing liquid-sealed vibration damping devices face challenges in reducing weight without compromising resonance properties, as changes to the orifice channel length or material can significantly impact resonance.
Innovation Solution
The design incorporates an inner cylinder, an intermediate sleeve elastically coupled by a main rubber elastic body, and an outer cylinder with a pair of fluid chambers and an orifice-forming member that includes a liquid storage section deeper than the orifice channel, allowing for reduced material usage and weight without affecting resonance, and features a recessed liquid storage section to improve moldability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the device is reduced in weight excessively, then weight is reduced, but resonance property is affected
Solution Approach 1:
The orifice-forming member is segmented into two distinct functional zones: an orifice channel with controlled depth for resonance function, and a liquid storage section with greater depth for weight reduction. This segmentation allows each zone to optimize its specific purpose without compromising the other.
Solution Approach 2:
Different depths are applied locally to different sections of the orifice-forming member. The orifice channel maintains a specific depth to preserve resonance properties, while the liquid storage section has increased depth to reduce overall material usage and weight, creating local quality variations that satisfy conflicting requirements.
2Weight of moving object
If the orifice channel length is changed to reduce weight, then weight is reduced, but resonance property is significantly impacted
Solution Approach 1:
The structure is divided into an orifice channel portion and a liquid storage section. By segmenting the fluid passage into these two zones, the design allows the orifice channel to maintain its precise dimensions for resonance while the liquid storage section provides additional volume for weight reduction without affecting resonance characteristics.
Solution Approach 2:
Instead of reducing weight by thinning the orifice channel in the horizontal dimension (which would affect resonance), the design extends vertically into the liquid storage section with greater depth. This dimensional transition allows weight reduction through increased vertical volume without compromising the horizontal dimensions critical for resonance.
3Weight of moving object
If the thickness of the orifice-forming member is reduced to reduce weight, then weight is reduced, but moldability deteriorates due to void formation
Solution Approach 1:
The design transitions from thinning walls horizontally to increasing depth vertically. By forming the liquid storage section with greater vertical depth rather than reducing horizontal thickness, the structure avoids the void formation issues associated with thin-walled resin molding while achieving weight reduction through optimized material distribution in the vertical dimension.
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 enables a significant reduction in the weight of the orifice-forming member while maintaining resonance properties, enhancing moldability and layout flexibility, and preventing erroneous assembly through symmetrical orifice-forming members.
Implementation Method 1
a main rubber elastic body that is interposed between the inner cylinder and the intermediate sleeve to elastically couple the inner cylinder with the intermediate sleeve
Implementation Method 2
an orifice-forming member that allows one fluid chamber to communicate with the other fluid chamber... the liquid storage section is formed deeper than the orifice channel
Data Source
AI summary
A pair of fluid chambers in which incompressible fluid is sealed and a pair of orifice-forming members that allows one fluid chamber to communicate with the other fluid chamber are arranged between an inner cylinder and an outer cylinder. The orifice-forming member has a longitudinal groove that communicates with respective fluid chambers, an orifice channel, and a liquid storage section that allows the longitudinal groove to communicate with the orifice channel. The liquid storage section is formed wider and deeper than the orifice channel.