Oil-lubricated bearing device and vacuum pump

An oil-lubricated bearing device comprising:

• a rolling bearing
• including an inner ring, an outer ring, rolling bodies, a holder configured to maintain a gap between adjacent ones of the rolling bodies and a lubricant storage disposed on a side provided with a tapered member with respect to the inner ring, and
• configured to support a rotor shaft;
• the tapered member provided at the rotor shaft to which the inner ring is fixed and formed with a first inclined surface rising with a slope toward the inner ring;
• and
• a contact portion configured to contact the first inclined surface to supply lubricant of the lubricant storage to the first inclined surface,
• wherein the holder includes
• pockets each penetrating from an inner peripheral holder surface to an outer peripheral holder surface and configured to hold a corresponding one of the rolling bodies,
• a second inclined surface formed by the outer peripheral holder surface and rising with a slope such that a distance from a center axis increases toward the lubricant storage,
• a third inclined surface formed by the inner peripheral holder surface and falling with a slope such that a distance from the center axis increases with distance from the lubricant storage, and
• a connection surface formed at a holder end portion opposite to the lubricant storage and connecting between the second and third inclined surfaces.