Rolling bearing device

Abstract

The objective of this invention is to provide a rolling bearing device that can efficiently spray lubricating oil from a lubricating oil supply device attached to the rolling bearing with a simple structure, achieving miniaturization and simplification of the oil supply mechanism, and efficiently and stably spraying lubricating oil corresponding to the rotational speed of the rolling bearing. The lubricating oil supply device B of the rolling bearing device of this invention includes: a tank 5 that holds lubricating oil O; and a pump or similar ejector 6, which includes an ejection mechanism for spraying lubricating oil supplied from the tank 5 into the bearing space between the inner ring 1 and the outer ring 2; and by opening a vent 10 in the wall of the tank 5 that communicates with the aforementioned bearing space, the pressure of the airflow generated and swirling from the bearing space, induced to flow into the tank 5 through the vent 10, supplies lubricating oil O from the oil supply passage 9 to the ejector 6.

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