Apparatus and method for inspecting a ball bearing
US5889218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Nov 17, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In the ball bearing inspection apparatus and method, the butting portion 7c of a skew drive shaft 7 rotatable coaxially with a spindle rotary shaft 1 is butted against steel balls 3 which are respectively held between the respective grooves of the inner ring 4b and outer ring 4a of a ball bearing 4 to be inspected, the spindle rotary shaft 1 is rotated while applying a pre-load to the outer ring 4a by a pre-load ring 5, and the skew drive shaft 7 is rotated while controlling the rotation speed of the skew drive shaft 7 in such a manner that the respective steel balls 3, which are being rotated on their own axes and around the spindle rotary shaft 1 due to the rotation of the spindle rotary shaft 1, is caused to make a skew movement due to the butting portion 7c. Therefore, physical quantities such as vibrations, sound pressures and the like generated from the ball bearing 4 to be inspected are measured in a condition that the respective balls 3 are making their respective skew movements in addition to their rotational movements on their own axes and around the spindle rotary shaft 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.