Dynamic Damper Retaining Structure for Vibration Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Dynamic dampers in vehicles face safety concerns due to degradation or failure of rubber or elastic elements under higher input loads, leading to potential breakage and resonance-induced vibrations.

Innovation Solution

A dynamic damper apparatus comprising a cylindrical mass member with protrusions, a collar member with an annular ridge, and an elastic member, where the protrusions extend over the annular ridge, providing enhanced stability and preventing the mass member from breaking apart upon elastic failure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rubber or elastic elements are used in dynamic dampers, then damping functionality is achieved, but degradation or failure occurs under higher input loads

Engineering Contradiction:

Improvedamping functionalityVSAvoidresistance to degradation

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent designs the collar member with an annular ridge and protrusions that extend over the ridge's outer surface, creating a mechanical retention system before elastic failure occurs. This preliminary structural arrangement ensures that when the elastic member degrades or breaks, the mass member remains constrained by the protrusions overlapping the annular ridge, preventing catastrophic failure and maintaining damping functionality.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If elastic members are used to connect mass member and collar member, then dynamic damping is achieved, but breakage occurs under high loads

Engineering Contradiction:

Improvedynamic damping capabilityVSAvoidresistance to breakage

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The collar member acts as an intermediary between the mass member and the vehicle structure. The annular ridge with protrusions extending over its outer surface serves as a mechanical backup system that mediates the connection, ensuring that even when the elastic member fails, the mass member remains retained and the damping system continues to function.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If protrusions extend over the annular ridge, then structural integrity is maintained upon elastic failure, but device complexity increases

Engineering Contradiction:

Improvestructural integrityVSAvoidcollar member structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The collar member is segmented into distinct functional features: a body portion and an annular ridge with protrusions. This segmentation allows each feature to perform its specific function - the body provides structural support while the annular ridge with protrusions provides retention functionality, simplifying the overall design while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

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 effectively suppresses vibrations and prevents safety hazards by maintaining structural integrity even when the elastic member fails, ensuring continued damping functionality and safety.

Implementation Method 1

an elastic member disposed coaxially with the cylindrical mass member and disposed between the cylindrical mass member and the collar member

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

A dynamic damper can be used on an engine mount, a transmission mount, or a chassis, where vibrations may be generated

Methodology Applied

Scientific EffectDamping: Damping

Data Source

PatentUS10156278B2Dynamic damper apparatus with retaining structure

Publication Date: 2018.12.18 HONDA MOTOR CO LTD

AI summary

A dynamic damper for dampening vibrations of a vehicle includes a cylindrical mass member with circumferentially arranged protrusions, a coaxial collar member including an annular ridge on an outer surface having a larger diameter than a body of the collar member, and a coaxial elastic member disposed between the cylindrical mass member and the collar member. The protrusions of the mass member can extend over an outer surface of the annular ridge of the collar member.