Simulation Hub for Runout Tester Verification

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Solution Overview

Problem

Existing motor vehicle hub runout testers face challenges in maintaining accuracy due to wear, difficulty in finding hubs with precise first harmonic runout values, and confusion between standard and ordinary hubs, leading to inaccurate verification and potential introduction of defective products.

Innovation Solution

A simulation hub with a detachable design, including an end plate, clamping portion, and measuring disc, where the clamping portion and measuring disc are fixed to the end plate with preset positioning holes and surfaces, allowing for precise runout testing and verification of the runout tester, and featuring preset first or second harmonic runout values to simulate defective hubs, ensuring accurate verification without confusion with ordinary hubs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a standard hub made from an ordinary hub is used for verification, then the runout tester can be verified, but the first harmonic runout value changes due to wear after multiple tests

Engineering Contradiction:

Improveverification accuracyVSAvoidservice life of standard hub

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The simulation hub is divided into three detachable components: end plate, clamping portion, and measuring disc. This segmentation allows the measuring disc to be replaced when worn, extending the service life of the standard hub while maintaining verification accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The simulation hub uses preset first or second harmonic runout values that are deliberately larger than ordinary hubs. This parameter change ensures the hub can be easily identified and provides sufficient signal for accurate tester verification while allowing replacement before wear affects accuracy.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If ordinary hubs are used as standard hubs, then verification can be performed, but it is difficult to find hubs with determined first harmonic runout values

Engineering Contradiction:

Improveavailability of standard hubVSAvoiddifficulty in producing standard hub

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

Instead of using ordinary hubs with natural runout values, the patent creates a simulation hub that copies and exaggerates the runout characteristics. The measuring disc is specifically designed with preset harmonic runout values, making it easy to produce and identify while serving the same verification purpose.

Inventive Principle:

Principle #26Copying

3Reliability

If a standard hub is used for verification, then tester accuracy can be checked, but the standard hub is easily confused with ordinary hubs and may flow into next procedure

Engineering Contradiction:

Improveverification capabilityVSAvoididentification of standard hub

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The simulation hub uses asymmetric design elements including preset harmonic runout values that differ from ordinary hubs, and a three-component detachable structure. These asymmetric features make the standard hub easily identifiable and distinguishable from ordinary hubs in the production flow.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent suggests using different colors or markings on the simulation hub components to visually distinguish them from ordinary hubs. This ensures that standard hubs cannot be accidentally confused with defective products ready for next procedure.

Inventive Principle:

Principle #32Color changes

4Measurement precision

If contact test method is used, then runout can be measured, but the measuring component and displacement sensor wear down

Engineering Contradiction:

Improverunout measurement accuracyVSAvoidservice life of testing equipment

Core Design Contradiction:

Measurement precisionVSDuration of action of stationary object

Solution Approach 1:

The simulation hub is designed with a measuring disc that has preset runout values, allowing the testing equipment to be verified without actually measuring the hub during production. This preliminary verification action prevents wear on both the hub and testing equipment while maintaining measurement precision.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11215452B2Simulation hub and verification method

Publication Date: 2022.01.04 CITIC DICASTAL CO LTD

AI summary

A simulation hub includes an end plate, a clamping portion and a measuring disc, in which the clamping portion and the measuring disc are both detachably fixed to the end plate; the clamping portion includes a first positioning hole for positioning and clamping, the first positioning hole is a cylindrical hole, and the cylindricity of the first positioning hole is smaller than a preset value; the outer circumference of the measuring disc includes at least a measuring cylindrical surface having a preset axial length and a bus parallel to an axis of the first positioning hole, and circular runout test values of the measuring cylindrical surface are preset first or second harmonic runout values; and the outer diameter of the measuring cylindrical surface is adapted to the inner diameter of the first positioning hole.