Hydraulic Mount Fluid-Track Structure for Multi-Directional Damping

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current damping mounts for vehicles, which consist of elastomeric and hydraulic components, face challenges in effectively restricting movement and damping vibrations across various load directions, leading to potential damage from uncontrolled movement.

Innovation Solution

A hydraulic mount design incorporating an inner tubular assembly, first and second elastomeric bodies, and a fluid-track with a central and peripheral portion, where the peripheral portion extends radially and includes gaps to restrict movement, and a flexible catch for secure attachment, facilitating fluid communication between chambers to manage vibrations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional elastomeric and hydraulic mount assembly is used, then vibrations can be dampened between components, but the mount fails to effectively restrict movement in various load directions, leading to uncontrolled movement and potential damage

Engineering Contradiction:

Improvemovement restriction capabilityVSAvoiduncontrolled movement and vibration damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The fluid track is segmented into a central portion and a peripheral portion, with the peripheral portion extending radially outward to contact elastomeric bodies in multiple directions. This segmentation allows the mount to restrict movement independently in radial and axial directions, addressing the inadequate movement restriction of conventional mounts.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The fluid track is positioned within the fluid chamber and nested between the elastomeric bodies and the inner tubular assembly. The peripheral portion of the fluid track is surrounded by and contacts the elastomeric bodies, creating a nested structure that enables multi-directional movement restriction while maintaining vibration damping functionality.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If the peripheral portion of the fluid-track contacts the elastomeric body wall during loading, then movement of the inner tubular assembly is restricted, but the structure becomes more complex

Engineering Contradiction:

Improvemovement restriction capabilityVSAvoidfluid-track structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fluid track serves multiple functions: it provides fluid communication between chambers through its passage, restricts radial movement through its peripheral portion contacting elastomeric bodies, and restricts axial movement through its central portion. This multi-functionality reduces the need for separate components, thereby limiting structural complexity while improving reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The fluid track combines the fluid passage function with the movement restriction function in a single integrated component. The peripheral portion that restricts radial movement and the central portion that restricts axial movement are merged into one structure, simplifying the overall design compared to using separate restriction mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

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 design effectively restricts movement in both radial and axial directions, preventing damage by managing vibrations through fluid transfer between chambers, thereby enhancing the damping efficiency across different load conditions.

Implementation Method 1

The passage provides fluid communication between the first and second fluid chambers

Methodology Applied

Scientific EffectFluid communication:

Implementation Method 2

The peripheral portion being configured to contact the wall during loading of the inner tubular assembly to restrict movement of the inner tubular assembly and the fluid-track

Methodology Applied

Scientific EffectMechanical contact and constraint: Mechanical Force

Implementation Method 3

The elastomeric mount member absorbs vibrations between the first component and the second component

Methodology Applied

Scientific EffectElastic vibration absorption: Elasticity

Implementation Method 4

the elastomeric mount member may exert a load onto the hydraulic mount member which transfers fluid between two chambers to dampen vibrations of the components

Methodology Applied

Scientific EffectHydraulic fluid transfer: Hydraulic Press

Data Source

PatentUS11009097B2Hydraulic mount having fluid-track

Publication Date: 2021.05.18 THE PULLMAN CO LLC

AI summary

A hydraulic mount includes an inner tubular assembly, first and second elastomeric bodies and a fluid-track. The first and second elastomeric bodies are attached to the inner tubular assembly and cooperate to define a first fluid chamber. The second elastomeric body also defines a second fluid chamber that is in fluid communication with the first fluid chamber via the fluid-track. The fluid-track is attached to the inner tubular assembly partially disposed in the first fluid chamber. The fluid-track includes a central portion, a peripheral portion and a passage. The peripheral portion extends radially outwardly from a periphery of the central portion. The passage provides fluid communication between the first and second fluid chambers. Gaps are positioned between the peripheral portion and a wall of one of the first and second elastomeric bodies. The peripheral portion being configured to contact the wall during loading of the inner tubular assembly to restrict movement of the inner tubular assembly and the fluid-track.