Tapered roller bearing with lubrication

摘要

A tapered roller bearing includes: an oil guide member (50) that opens and closes an annular opening between an outer peripheral surface of a large rib (12) of an inner ring (10) and an outer ring (20) and is mounted on the large rib; and a discharge port that discharges, along the outer peripheral surface of the large rib (12), lubricating oil and is formed through an inner peripheral portion of the oil guide member (56). The oil guide member (50) includes a closing portion (55) for closing the annular opening. When a fluid pressure of the lubricating oil which flows through pockets (43) of a cage (40) toward an inner peripheral surface (21) of the outer ring (20) is below a predetermined values, the closing portion (55) closes the annular opening and guides the lubricating oil toward the discharge port. When the fluid pressure exceeds the predetermined value, the closing portion (55) opens the annular opening.