Bearing preload measuring method and apparatus
US5877433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | May 27, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a duplex bearing 10 in which a preload is applied to balls 14a and 14b interposed between an outer race 11 and first and second inner races 12 and 13 by tightening a nut 16, a preload jig 19 fitted to the lower end of the second inner race 13 is turned by a motor 21 and applied with an axial load by a rod 31. The rod 31 has a load detector 31 at the middle. Position sensors 24 and 25, each of which is adapted to detect an amount of displacement in the direction of axis, are provided at the ends of the outer race 11 and the second inner race 13, respectively. A rotation detecting sensor 33 adapted to detect a rotational position is provided below the lower surface of the preload jig 9. Under the condition that the axial load is applied to the extent that measuring loads are FH and FL, the amounts of average displacement XAH and XAL of the outer race 11, and the amounts of average displacement XBH and XBL are detected, and the amounts of displacement .DELTA.XH and .DELTA.XL which are the differences between those amounts are calculated, so that the aimed rigidity KA is calculated by utilizing the amounts of displacement .DELTA.XH and .DELTA.XL thus calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.