Integrated Rubber Mass Mount for Dynamic Spring Constant Control
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Solution Overview
Problem
Conventional anti-vibration devices face increased dynamic spring constants due to surging of the body rubber, leading to complex configurations and higher manufacturing costs.
Innovation Solution
An anti-vibration device with a body rubber having a rubber body portion and a rubber mass portion integrally formed from the same rubber, where the rubber mass portion protrudes from the rubber body portion without contacting the attachment members, effectively suppressing the increase in dynamic spring constant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring member or separate mass member is added to suppress surging, then the dynamic spring constant increase is reduced, but the device configuration becomes complicated and manufacturing cost increases
Solution Approach 1:
The patent merges the mass function into the body rubber itself by creating a rubber mass portion that is integrally formed with the rubber body portion from the same rubber material. This eliminates the need for separate ring members or mass members, thereby suppressing surging while maintaining a simple configuration and reducing manufacturing complexity
Solution Approach 2:
The body rubber is designed to serve multiple functions: it provides vibration isolation through its elastic properties and simultaneously acts as a mass element through the rubber mass portion. This multi-functionality allows the body rubber to suppress surging without requiring additional dedicated mass components
2Reliability
If a ring member or separate mass member is added to suppress surging, then the dynamic spring constant increase is reduced, but manufacturing cost increases
Solution Approach 1:
The patent combines the mass function with the body rubber by forming the rubber mass portion integrally from the same rubber material. This eliminates the need for separate components and their associated assembly processes, thereby reducing manufacturing cost while maintaining effective surging suppression
Solution Approach 2:
The rubber mass portion and rubber body portion are both made from the same rubber material, ensuring homogeneous material properties throughout. This simplifies manufacturing by eliminating the need for different materials and their respective joining processes, thereby reducing manufacturing cost
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 provides a simple configuration that efficiently suppresses dynamic spring constant surging while reducing manufacturing complexity and costs.
Implementation Method 1
a rubber mass portion that is not in contact with either the outer attachment member or the inner attachment member and protrudes from the rubber body portion
Implementation Method 2
suppress the increase in the dynamic spring constant due to surging of the body rubber
Data Source
AI summary
An anti-vibration device of the present disclosure is an anti-vibration device including a cylindrical outer attachment member, an inner attachment member disposed closer to one side of the outer attachment member in an axial direction, and a body rubber connecting the outer attachment member and the inner attachment member, the body rubber having an outer surface formed in a shape of a truncated cone convex toward the inner attachment member. The body rubber includes a rubber body portion and a rubber mass portion. The rubber body portion is in contact with the outer attachment member and the inner attachment member, the rubber mass portion is not in contact with either the outer attachment member or the inner attachment member and protrudes from the rubber body portion, and the rubber body portion and the rubber mass portion are integrally formed from the same rubber.