Torsion Bar Mounting Structure for Vehicle Accessory Vibration Isolation

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Solution Overview

Problem

Existing vibration isolation systems for vehicle-mounted accessories are prone to wear, require frequent maintenance, and are ineffective in harsh environments, as they are not robust enough to withstand temperature fluctuations and environmental hazards while providing adequate vibration filtering.

Innovation Solution

A torsion bar mounting device with first and second elongated bar structures connected by a common hub, configured to reduce vibration transmission between a vehicle and an accessory, featuring a compact design that resists fatigue and environmental damage, and is tuned to specific vibrational frequencies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a robust connection is used to withstand environmental hazards, then reliability is improved, but vibration transmission increases

Engineering Contradiction:

Improvewithstand environmental hazardsVSAvoidvibration transmission

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces a vibration isolator as an intermediary component between the accessory and vehicle mounting surfaces. This isolator absorbs and dampens vibration energy while maintaining a robust mechanical connection that can withstand environmental hazards such as temperature fluctuations and exposure to weather.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The vibration isolator employs composite material structures combining rigid elements for structural integrity with damping materials for vibration absorption. This composite approach allows the connection to be simultaneously robust against environmental hazards and effective at filtering vibrations.

Inventive Principle:

Principle #40Composite materials

2Object-generated harmful factors

If an effective vibration isolator is used to decrease vibration transmission, then vibration filtering is improved, but susceptibility to wear and damage increases

Engineering Contradiction:

Improvevibration transmissionVSAvoidsusceptibility to wear and damage

Core Design Contradiction:

Object-generated harmful factorsVSReliability

Solution Approach 1:

The vibration isolator's physical parameters such as stiffness, damping coefficient, and geometry are specifically tuned to match the vibrational characteristics of the accessory and vehicle. This optimization allows the isolator to be effective at anticipated vibration amplitudes and frequencies while maintaining durability against wear and environmental damage.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The isolator is designed with pre-configured damping capabilities that cushion the accessory against vibration-induced stresses before damage can occur. This beforehand protection reduces the cumulative wear on the isolator and connected components, extending operational life.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Device complexity

If a passive isolator is used to simplify the system, then device complexity is reduced, but effectiveness is limited to specific frequencies

Engineering Contradiction:

Improveisolator structureVSAvoidfrequency range effectiveness

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The passive isolator incorporates dynamic characteristics through its material properties and structural design, allowing it to effectively dampen a broader range of vibration frequencies. The isolator's inherent damping and stiffness properties create a frequency-dependent response that provides effective isolation across the anticipated vibration spectrum without requiring active control systems.

Inventive Principle:

Principle #15Dynamics

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 torsion bar mounting device effectively reduces vibration transmission, enhances the operational lifetime of accessories by acting as a low-pass filter, and maintains structural integrity in adverse conditions, providing significant vibration isolation and durability.

Implementation Method 1

The first and second torsion bar structures may be configured to decrease transmission of vibration frequencies between the vehicle and the accessory

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

Passive isolators include materials and mechanical systems that absorb and damp the vibration

Methodology Applied

Scientific EffectDamping: Damping

Implementation Method 3

The middle portions of the bar structures may be configured to decrease transmission of vibration between the vehicle and the accessory

Methodology Applied

Scientific EffectLow-pass filtering: Filter (physical)

Data Source

PatentUS10907697B2Torsion bar mounting device

Publication Date: 2021.02.02 THE BOEING CO

AI summary

A mounting device is disclosed, including a first torsion bar structure having an elongated axis and opposing end portions connected by a middle portion. The mounting device further includes a second torsion bar structure having an elongated axis and opposing end portions connected by a middle portion. The middle portions of the first and second torsion bar structures are connected. The end portions of the first torsion bar structure are configured for attachment to a vehicle, and the end portions of the second torsion bar structure are configured for attachment to an accessory. The first and second torsion bar structures are configured to decrease transmission of vibration frequencies between the vehicle and the accessory.