Coil Spring Damper Ribs for Accurate Positioning
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Solution Overview
Problem
Existing vibration insulation dampers for coil springs face challenges in accurate positioning, assembly, and anti-vibration characteristics due to large contact areas and potential for kinking or twisting, leading to noise issues, especially when the rubber member hardens over time.
Innovation Solution
A vibration insulation damper with a conical or pyramid outer surface and ribs that protrude outward to reduce contact area and facilitate accurate positioning within the coil spring, featuring a split body design for easier assembly and stable pressing force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a rubber member with large contact area is used to fit into the coil spring, then the pressing force to the coil spring is sufficient, but the rubber member is difficult to assemble accurately and may cause kinking or twisting motion
Solution Approach 1:
The rubber member is divided into multiple segments along its axial direction, with each segment having a rib structure. This segmentation reduces the contact area between the rubber member and coil spring, preventing kinking and twisting motion during assembly while maintaining sufficient pressing force through the rib structures.
Solution Approach 2:
The rubber member features ribs protruding from its outer circumferential surface at specific locations. These ribs create localized contact points with the coil spring rather than continuous contact, concentrating the pressing force at key positions while reducing overall contact area to prevent deformation during assembly.
2Reliability
If a cylindrical elastic member is fitted onto the external circumferential portion of the coil spring, then the elastic body prevents dropping off, but it is difficult to assemble with swiftness and accuracy
Solution Approach 1:
The rubber member is segmented into multiple sections along the axial direction, each with protruding ribs. This segmentation creates a structure that can be more easily inserted into the coil spring while the ribs engage with the spring wires to prevent dropping off, thus improving both assembly efficiency and retention.
Solution Approach 2:
The rubber member has a substantially cylindrical shape with curved outer circumferential surface that matches the curvature of the coil spring. This curved geometry facilitates smooth insertion and assembly while the rib structures provide mechanical interlocking to prevent dropping off.
3Object-affected harmful factors
If the rubber member is press fitted into the coil spring, then the rubber member provides vibration insulation, but it hardens due to temporal change and becomes fixed in shape causing sliding noises
Solution Approach 1:
The rubber member is divided into multiple segments with ribs, creating gaps between the rubber and coil spring. This segmentation prevents the rubber from becoming completely fixed in shape even after hardening, allowing minimal movement to accommodate temporal changes and prevent sliding noises while maintaining vibration insulation through the rib structures.
Solution Approach 2:
The rib structures on the rubber member create variable contact parameters with the coil spring. The ribs provide localized pressure points that maintain vibration insulation effectiveness while the segmented structure allows the rubber to accommodate dimensional changes over time without becoming completely rigid, thus preventing noise generation.
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 accurate positioning and assembly without kinking or twisting, reduces sliding noise, and maintains effective anti-vibration characteristics even when the elastic body hardens, improving assembly efficiency and noise suppression.
Implementation Method 1
an elastic body having a conical or pyramid outer circumferential surface
Implementation Method 2
a rib protruding outward from the outer circumferential surface of the elastic body to be brought into pressured contact with the internal circumferential portion of the coil spring
Data Source
AI summary
A vibration insulation damper (10, 50, 60) insertable into an internal circumferential portion of a coil spring (20) and extending in an axial direction thereof, the vibration insulation damper is provided with an elastic body (14a, 14b, 64a, 64b) having a conical or pyramid outer circumferential surface formed so as to be shortened in distance with respect to the axial direction toward an end portion thereof in the axial direction, and a rib (16a, 16b, 16c, 16d, 16e, 16f, 56a, 56b, 56c, 56d, 56e, 56f) protruding outward from the outer circumferential surface of the elastic body to be brought into pressured contact with the internal circumferential portion of the coil spring when the elastic body is inserted into the internal circumferential portion of the coil spring.