Vibration Damping Device Heat Insulating Member

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Solution Overview

Problem

Vibration damping devices used in high-temperature environments, such as near an automobile engine, face issues with heat transmission to the attachment member, leading to potential cavitation and deterioration of the attachment portion between the second attachment member and the elastic body.

Innovation Solution

A vibration damping device design featuring a tubular metal bracket with a second attachment member inserted into it, an elastic body connecting the attachment members, a partition member dividing the liquid chamber into main and auxiliary chambers, and a diaphragm forming part of the partition wall, with one end closed by the elastic body and the other by a diaphragm, and a gap between the outer and inner surfaces of the attachment member and bracket, along with a heat insulating member to prevent heat transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the second attachment member is directly connected to the metal bracket, then the structural strength and rigidity are improved, but heat is transmitted to the attachment member causing cavitation and deterioration

Engineering Contradiction:

Improvestructural strengthVSAvoidheat transmission

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

A heat insulating member is introduced as an intermediary component between the metal bracket and the second attachment member. This heat insulating member has high thermal resistance to block heat transmission from the bracket to the attachment member, while maintaining the structural connection. The heat insulating member is inserted into the liquid chamber and abuts against the second attachment member, creating a thermal barrier that prevents heat-induced cavitation and deterioration.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If the second attachment member is inserted into the metal bracket, then the assembly is simplified, but heat from the bracket deteriorates the attachment portion between the second attachment member and the elastic body

Engineering Contradiction:

Improveassembly simplicityVSAvoidattachment portion reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The heat insulating member serves as a protective intermediary that is inserted into the liquid chamber and abuts against the second attachment member. This intermediary component blocks heat transmission from the metal bracket to the attachment portion, preventing deterioration of the bond between the second attachment member and the elastic body, thereby maintaining reliability while preserving the simple inserted assembly structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the gap between the second attachment member and metal bracket is sealed, then liquid leakage is prevented, but heat transmission to the attachment member increases

Engineering Contradiction:

Improveliquid sealingVSAvoidheat transmission

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The heat insulating member is positioned within the liquid chamber and abuts against the second attachment member, creating a thermal barrier that blocks heat transmission from the metal bracket. This heat insulating intermediary is integrated into the sealing structure, allowing the gap to be sealed against liquid leakage while the heat insulating member prevents heat from reaching the attachment member, thus resolving both sealing and heat transmission requirements.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Effectively prevents heat from being transmitted to the attachment member, reducing the risk of cavitation and deterioration, while maintaining effective vibration damping capabilities.

Implementation Method 1

a heat insulating member (22) made of a material having a higher thermal resistance than that of the metal bracket 20

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

both attachment members are displaced relative to each other while elastically deforming the elastic body

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 3

a liquid pressure of the main liquid chamber is changed such that a liquid flows through the restriction passage, and thus, the vibrations are absorbed and dampened

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Data Source

PatentUS10851866B2Vibration damping device

Publication Date: 2020.12.01 PROSPIRA CORP

AI summary

A vibration damping device (1, 10, 100) includes a tubular metal bracket (20, 120), a first attachment member (12, 112), a second attachment member (11, 23, 111), an elastic body (13, 113), a partition member (17, 117), and a diaphragm (19, 119). A fixed portion (11g, 23c, 111c) fixed to a fixing portion (20b, 120b) of the metal bracket is formed in the second attachment member. A gap (S2, S21) is provided between a portion of an outer circumferential surface of the second attachment member except for the fixed portion, and a portion of an inner circumferential surface of the metal bracket except for the fixing portion, and a second seal portion (22, 123) is provided between the fixed portion and the fixing portion.