Split Intermediate Sleeve Mount for Simpler Hydraulic Damping
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Solution Overview
Problem
Conventional liquid-filled tubular vibration damping devices require complex manufacturing processes and multiple parts to achieve effective vibration damping, including the need for diameter reduction of components and separate orifice members, which increases costs and assembly complexity.
Innovation Solution
A novel structure featuring a synthetic resin intermediate sleeve divided into two parts, eliminating the need for diameter reduction and separate orifice members, with a simplified outer tubular member design and integrated rubber components to form orifice passages, reducing the number of parts and manufacturing steps while maintaining effective vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional structure with separate orifice member and diameter reduction processes is used, then the liquid-tight sealing is achieved, but the number of manufacturing processes and parts increases
Solution Approach 1:
The patent merges the orifice member function into the outer tubular member by forming an orifice groove directly on its inner circumferential surface. The sealing rubber layer is integrated onto the outer tubular member rather than being a separate component. This consolidation eliminates the need for separate orifice members and diameter reduction processes while maintaining liquid-tight sealing through the integrated sealing rubber layer that contacts the intermediate sleeve.
Solution Approach 2:
The outer tubular member is designed to perform multiple functions: it provides structural support, forms the orifice passage through the groove, and integrates the sealing function through the sealing rubber layer. This multi-functional design replaces the conventional separate orifice member and sealing components, reducing part count while achieving the same sealing reliability.
2Reliability
If the intermediate sleeve and outer tubular member are reduced in diameter, then the close contact and liquid-tight sealing are achieved, but the number of manufacturing processes increases
Solution Approach 1:
The patent combines the sealing function with the outer tubular member by integrating the sealing rubber layer directly onto it. This eliminates the need for separate diameter reduction processes on both the intermediate sleeve and outer tubular member, as the sealing is achieved through the integrated rubber layer that can accommodate dimensional variations while maintaining liquid-tight contact.
3Strength
If the main rubber elastic body is pre-compressed in radial direction, then the tensile stress due to thermal contraction is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent integrates the sealing rubber layer with the outer tubular member, creating a unified structure that eliminates the need for separate pre-compression and diameter reduction processes. The integrated design allows the sealing function to be achieved through the rubber layer's inherent elasticity and contact pressure, reducing manufacturing complexity while maintaining stress resistance.
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
The solution simplifies the manufacturing process, reduces part count, and enhances durability by reducing tensile stress on the rubber components, while maintaining effective vibration damping performance through fluid flow action.
Implementation Method 1
utilizes the vibration damping action based on the flow action, etc. of a liquid sealed inside
Implementation Method 2
a main rubber elastic body connecting the inner axial member and the tubular part of the intermediate sleeve
Implementation Method 3
reduce or eliminate tensile stress due to thermal contraction after vulcanization molding of the main rubber elastic body
Data Source
AI summary
A liquid-filled tubular vibration damping device including: an inner axial member; an intermediate sleeve made of synthetic resin and formed by twin sleeve divisions and divided in a circumferential direction; a main rubber elastic body connecting the inner axial member and a tubular part of the intermediate sleeve; an outer tubular member receiving the tubular part inserted therein; twin liquid chambers formed in the main rubber elastic body and communicated by an orifice passage; an outer flange formed at a first end in an axial direction of the tubular part of the intermediate sleeve; an outer circumference rubber fixed to an outer circumferential surface of the tubular part to be press-fitted in the outer tubular member; and an orifice groove formed in the outer circumference rubber and covered by the outer tubular member so that the orifice passage is formed.