Hydraulic Anti-Vibration Mount Sealing Without Internal Interference

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Solution Overview

Problem

In conventional anti-vibration devices, the sealing material protrudes radially inward and can abut against internal members, causing potential interference and functionality issues.

Innovation Solution

The anti-vibration device design includes an injection hole in the outer cylinder that opens toward at least one of the first connecting aperture or the second connecting aperture, allowing the sealing material to enter these apertures without abutting against internal members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the injection hole is sealed with a sealing material, then the liquid chamber is sealed, but the sealing material protrudes radially inward and may abut against internal members

Engineering Contradiction:

Improvesealing reliabilityVSAvoidinterference with internal members

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The sealing material is nested within the injection hole, with its outer diameter designed to be smaller than the inner diameter of the injection hole. This allows the sealing material to be contained within the hole rather than protruding outward, eliminating interference with internal members while maintaining sealing functionality.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The injection hole acts as an intermediary structure that accommodates the sealing material. By designing the injection hole with sufficient radial clearance, it mediates between the sealing requirement and the space constraint, allowing the sealing material to function without contacting internal members.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the sealing material is fitted into the injection hole, then the liquid is sealed in the liquid chamber, but the aperture circumferential edge of the injection hole may be plastically deformed radially inward

Engineering Contradiction:

Improvesealing reliabilityVSAvoidinjection hole shape stability

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The injection hole is designed with预先 radial clearance (the space between the sealing material outer diameter and the injection hole inner diameter) to cushion against plastic deformation. This pre-designed gap absorbs the deformation stress that occurs when the sealing material is fitted, preventing the aperture circumferential edge from being plastically deformed radially inward.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If the sealing material protrudes radially inward, then the injection hole is sealed, but it may abut against the covering member or other internal members

Engineering Contradiction:

Improvesealing reliabilityVSAvoidinternal member operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The sealing material is nested within the injection hole with its outer diameter smaller than the hole's inner diameter. This nesting arrangement ensures the sealing material remains contained and cannot protrude to interfere with the covering member or other internal members, maintaining both sealing reliability and operational ease.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 design effectively prevents the sealing material from contacting internal members, ensuring proper operation and reducing the risk of interference or damage.

Implementation Method 1

an elastic body elastically connecting the inner attachment member and the outer cylinder

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a liquid that is sealed in the liquid chamber

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Data Source

PatentUS12287020B2Anti-vibration device

Publication Date: 2025.04.29 PROSPIRA CORP

AI summary

An anti-vibration device (1) includes a covering member (17), arranged between an inner attachment member (11) and an outer cylinder (12), that covers, from outside in the radial direction, the area between a pair of middle elastic bodies (32) adjacent to each other in the circumferential direction, and defines a pair of liquid chambers (14a, 14b) between the inner attachment member and the covering member. An orifice passage (19) connecting each liquid chamber is formed between the covering member and the outer cylinder. A first connecting aperture (18) and a second connecting aperture (20) that separately connect each liquid chamber and the orifice passage are formed in the covering member. An injection hole (12a) formed in the outer cylinder and sealed by a sealing material (16) opens toward at least one of the first connecting aperture and the second connecting aperture.