Balancing Machine Motor Mounting for Vibration Isolation

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Solution Overview

Problem

Existing balancing machines for motor vehicle wheels are affected by vibrations generated by the rotating belt and pulley eccentricity, which interfere with the measurement of imbalance forces, requiring costly signal filtering and complicating the measurement process.

Innovation Solution

A balancing machine design where the actuation motor is mounted on an extension of the supporting element connecting the rotating shaft to the measurement transducers, allowing the transducers to be coupled elastically along perpendicular planes, effectively isolating them from belt-induced vibrations and eccentricity forces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the motor is mounted laterally adjacent to the frame or on board the frame, then the motor can be positioned conveniently, but the vibration generated by the rotating belt or pulley eccentricity negatively affects the measurement of imbalance forces

Engineering Contradiction:

Improvemotor positioning convenienceVSAvoidvibration affecting measurement

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The motor is extracted from the frame structure and mounted on an independent extension of the supporting element. This separation removes the source of vibration (motor and belt drive) from the measurement system (frame with transducers), eliminating the harmful vibration effect while maintaining operational convenience.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

An extension of the supporting element serves as an intermediary structure between the rotating shaft and the frame. The motor is mounted on this extension, which acts as a mechanical isolator, preventing vibration transmission from the motor/belt system to the measurement transducers on the frame.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If signal filtering is applied to remove vibration effects, then measurement accuracy improves, but measurement time increases and costs increase

Engineering Contradiction:

Improveimbalance force measurement accuracyVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The design preemptively prevents vibration from reaching the measurement system through proper motor mounting on the supporting element extension. By eliminating the vibration source at its origin rather than filtering it later, the system achieves accurate measurements without requiring time-consuming signal filtering processes.

Inventive Principle:

Principle #9Preliminary anti-action

3Device complexity

If the transducers have measurement axes substantially parallel to each other, then the frame can be simplified in shape, but the complexity of construction increases and obtaining correlated signals becomes difficult

Engineering Contradiction:

Improveframe construction complexityVSAvoidsignal correlation difficulty

Core Design Contradiction:

Device complexityVSDifficulty of detecting and measuring

Solution Approach 1:

The transducers are arranged with measurement axes in perpendicular planes rather than parallel. This spatial reconfiguration in multiple dimensions allows each transducer to measure forces in orthogonal directions, simplifying the frame construction while enabling easy correlation of signals through vector composition to determine total imbalance force.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 enables accurate measurement of imbalance forces without interference from belt vibrations or pulley eccentricity, simplifies manufacturing, and reduces the need for costly filtering, resulting in a reliable and cost-effective balancing machine.

Implementation Method 1

force transducers adapted to measure the centrifugal force generated by the imbalances present on the rotating body

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

at least one first measurement transducer and one second measurement transducer being coupled elastically, along perpendicular planes, to an extension of said supporting element

Methodology Applied

Scientific EffectVibration isolation through elastic coupling: Elasticity

Data Source

PatentUS8347712B2Balancing machine for rotating bodies, particularly for motor vehicle wheels

Publication Date: 2013.01.08 BUZZI CARLO

AI summary

A balancing machine for rotating bodies, particularly for wheels of motor vehicles and the like, including a rotating shaft supported by a supporting element which is connected rigidly to the frame of the balancing machine, at least one first measurement transducer and one second measurement transducer being coupled elastically, along perpendicular planes, to an extension of the supporting element, an actuation motor being connected to the rotating shaft by means of a belt, the actuation motor being connected on an extension of the supporting element, and the extension connecting the rotating shaft to the measurement transducers.