Vibration-Damping Device Nested Tube Pre-Compression
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Solution Overview
Problem
Conventional vibration-damping devices require multiple components and lack pre-compression in directions orthogonal to the axis, leading to increased complexity and reduced durability.
Innovation Solution
A vibration-damping device comprising outer and inner attachment members with an elastic body, where the outer attachment members are disposed on the outer side of the elastic body, and the inner attachment member is interposed between them, allowing for pre-compression in directions perpendicular to the axis, reducing the number of components needed and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two pieces of vibration-damping rubber are combined with flanges disposed adjacent to each other, then the vibration-damping device can be assembled between skeleton bracket and receiving bracket, but the number of components is increased
Solution Approach 1:
The patent merges two separate vibration-damping rubber pieces into a single integrated vibration-damping device. The outer tube accommodates an inner tube with integrated flanges, eliminating the need for separate combined pieces. This reduces the number of components while maintaining the sandwich-type assembly capability between brackets.
Solution Approach 2:
The patent employs a nested structure where the inner tube is accommodated within the outer tube. The inner tube has flanges that extend axially, and the rubber elastic body is integrated between the outer tube's inner circumferential surface and the inner tube's outer circumferential surface. This nested configuration allows the device to function as a unified component rather than requiring multiple separate pieces.
2Strength
If two pieces of vibration-damping rubber are combined with engine attach bracket sandwiched between flanges, then the rubber elastic bodies can be mounted in compressed state, but pre-compression cannot be applied in direction orthogonal to axial direction
Solution Approach 1:
The patent extends the pre-compression capability from only the axial direction to include the direction orthogonal to the axis. The inner tube's flanges are configured to enable pre-compression in the radial direction, while the axial compression is maintained through the nested tube structure. This multi-directional pre-compression capability enhances durability without requiring multiple separate pieces.
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 enables efficient assembly and mounting of the vibration-damping device with reduced component count and improved durability by applying pre-compression in orthogonal directions, preventing deformation and falling-off, while eliminating the need for dividing inner tubes.
Implementation Method 1
an elastic body positioned on an outer side of the inner attachment member and coupling the outer attachment members with the inner attachment member
Implementation Method 2
Such a vibration-damping device may be used to absorb and damp vibration generated by the vibration generators
Data Source
AI summary
Included are an outer attachment member 12, which is coupled to one of a vibration generator 16 and a vibration receiver, an inner attachment member 11, which is coupled to the other one of the vibration generator 16 and the vibration receiver, and an elastic body 13, which is positioned on the outer side of the inner attachment member 11 to couple the outer attachment member 12 and the inner attachment member 11. The outer attachment member 12 is disposed in at least one pair on the outer side of the elastic body 13, with the inner attachment member 11 being interposed between the at least one pair of outer attachment members 12. Each of the at least one pair of outer attachment members 12 includes an attachment surface 14, which is attached to the one of the vibration generator 16 and the vibration receiver.