First Harmonic Runout Simulation Hub for Tester Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor vehicle hub runout testers face challenges in accurately verifying and maintaining the accuracy of first harmonic runout values due to wear and confusion with ordinary hubs, leading to potential introduction of defective products.
Innovation Solution
A first harmonic runout simulation hub with a measuring disc and clamping portion, featuring a cylindrical hole and measuring cylindrical surface with preset axial length and radial distance, simulates unqualified hubs to accurately verify runout testers while having a simple structure and long service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard hub made from an ordinary hub is used for verification, then the verification can be performed with existing hub resources, but the first harmonic runout value changes due to wear after multiple tests
Solution Approach 1:
The simulation hub is divided into two detachable parts: a clamping portion (simulating the hub body) and a measuring disc (simulating the bead seat). This segmentation allows the measuring disc to be replaced independently when worn, while retaining the clamping portion, thus solving the wear problem without discarding the entire verification device.
Solution Approach 2:
Instead of using a real hub as the standard, the patent creates a simulation hub that copies only the essential features needed for verification (clamping interface and measuring surface). This copying approach eliminates unnecessary complexity and wear-prone components while maintaining verification functionality.
2Ease of manufacture
If a standard hub made from an ordinary hub is used for verification, then the verification process can proceed with available resources, but the standard hub is easily confused with ordinary hubs and may flow into the next procedure
Solution Approach 1:
The simulation hub employs asymmetric design features: the clamping portion has a specific cylindrical hole configuration that differs from ordinary hubs, and the measuring disc has a unique surface geometry. These asymmetric features make the simulation hub visually and structurally distinguishable from ordinary hubs, preventing accidental misuse.
Solution Approach 2:
The simulation hub concentrates its special features in localized areas: the clamping portion has precisely positioned positioning holes with specific tolerances, and the measuring disc has a uniquely shaped measuring surface. These localized quality differences ensure easy identification while maintaining ease of manufacture through focused precision rather than overall complexity.
3Device complexity
If ordinary hubs are used as standard hubs, then no additional components need to be manufactured, but it is difficult to find hubs with determined first harmonic runout values that are relatively large
Solution Approach 1:
The simulation hub allows precise control of the first harmonic runout value by adjusting the relative position between the clamping portion and measuring disc. The runout value is determined by the radial distance between the axis of the measuring cylindrical surface and the axis of the first positioning hole, which can be precisely set during manufacturing to achieve desired verification levels.
Solution Approach 2:
The patent extracts only the essential measuring function from the complex hub structure. By separating the measuring disc from the clamping portion and using simplified geometric features (cylindrical holes, cylindrical surfaces), the design achieves precise runout control without the complexity of manufacturing entire hubs with controlled defects.
Data Source
AI summary
A first harmonic runout simulation hub includes a measuring disc and a clamping portion detachably fixed together, in which the clamping portion is fixed in the middle of the measuring disc; 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 a measuring cylindrical surface having a preset axial length and a bus parallel to an axis of the first positioning hole, the radial distance between the axis of the measuring cylindrical surface and the axis of the first positioning hole is greater than a preset value, and circular runout test values on the measuring cylindrical surface are preset first harmonic runout values.