Rolling bearing device and oil supply unit
US10240636B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2018 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Mar 22, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C19/163
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rolling bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls, and a cage that holds the plurality of balls; and an oil supply unit provided adjacent to the bearing portion in the axial direction and configured to supply lubricating oil to the bearing portion. The oil supply unit has: a pump that suctions lubricating oil into an oil chamber and discharges the lubricating oil by varying a capacity of the oil chamber by periodically driving a piezo element; and a control portion that causes the pump to operate by varying a rising time of a voltage applied to the piezo element in accordance with whether a drive period of the piezo element is long or short.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.