Rubber-Mount Stopper Structure for Precise Vibration Damping
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Solution Overview
Problem
Existing vibration-damping devices face challenges in reducing the allowable displacement of the rubber elastic body while maintaining desired vibration damping characteristics, as it increases manufacturing costs and complexity to adjust the small gap between the stopper and receiving part using traditional molding methods.
Innovation Solution
The vibration-damping device design includes a housing with a cylindrical mounting hole and a vibration-damping member featuring an outer cylinder, inner cylinder, and a rubber elastic body with axially penetrating bores and radially-inner wall stoppers, where only the stopper and receiving part are formed in the rubber elastic body, allowing for precise adjustment of vibration-damping characteristics without mold size restrictions, thus reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gap between the stopper and receiving part is reduced to adjust vibration damping characteristics, then the vibration damping characteristics are improved, but the manufacturing cost increases due to additional processing steps
Solution Approach 1:
The invention divides the stopper and receiving part into separate components: the stopper is formed in the rubber elastic body while the receiving part is formed in the housing. This segmentation allows each component to be manufactured independently using standard molding processes, eliminating the need for complex mold design and additional processing steps while achieving the desired small gap for vibration damping control
Solution Approach 2:
The stopper acts as an intermediary element between the rubber elastic body and the receiving part. By positioning the stopper within the bore of the rubber elastic body and allowing it to engage with the receiving part in the housing, the system achieves precise control over the gap distance without requiring the entire assembly to be molded as a single complex unit, thus reducing manufacturing costs
2Length of moving object
If the diameter of the outer cylinder is reduced to decrease the gap between stopper and receiving part, then the allowable displacement is reduced, but the device complexity increases due to multiple manufacturing processes
Solution Approach 1:
The invention segments the vibration-damping device into distinct functional components: the outer cylinder, inner cylinder, rubber elastic body with stopper, and housing with receiving part. This segmentation allows each component to be manufactured using standard processes and then assembled, avoiding the need for complex multi-step manufacturing while achieving precise control over the gap and allowable displacement
Solution Approach 2:
Instead of controlling the gap by adjusting the diameter of the outer cylinder in one dimension, the invention moves the control mechanism to another dimension by positioning the stopper within the bore of the rubber elastic body and allowing engagement with the receiving part in the housing. This dimensional shift enables independent control of the gap without affecting the overall device structure or requiring complex manufacturing processes
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 precise adjustment of vibration-damping characteristics while preventing increased manufacturing costs, allowing for a small gap between the stopper and receiving part, facilitating efficient vibration absorption and reducing processing complexity.
Implementation Method 1
a rubber elastic body inserted between the outer cylinder and the inner cylinder to elastically join the outer cylinder with the inner cylinder
Implementation Method 2
the stopper comes in contact with the receiving part to regulate the displacement of the rubber elastic body
Data Source
AI summary
A vibration-damping device includes a housing having a cylindrical mounting hole therein and a vibration-damping member provided in the mounting hole. The vibration-damping member includes an outer cylinder fitted into the mounting hole, an inner cylinder provided in the outer cylinder, and a rubber elastic body inserted between the outer cylinder and the inner cylinder. The rubber elastic body is formed with a bore penetrating in an axial direction thereof and a stopper protruding from a radially-inner wall surface thereof for the bore. The housing is formed with a receiving part which faces the stopper, in a radial direction of the mounting hole, across a gap.