| 摘要 |
PROBLEM TO BE SOLVED: To provide a tapered roller baring in which increase in friction caused by shortage of a lubrication oil upon starting rotation can be prevented, and an amount of supply of the lubrication oil from a small diameter side to a large diameter side excluding a rib portion can be adjusted.SOLUTION: A tapered roller bearing 10 is provided which is composed of an outer ring 11 in which an outer ring-side raceway surface inclined to an axis is formed on its inner periphery, an inner ring 20 in which an inner ring-side raceway surface inclined to the axis is formed on its outer periphery, and a plurality of tapered rollers 40 rolling on the outer ring-side raceway surface and the inner ring-side raceway surface. In the tapered roller bearing 10, at least one of the outer ring-side raceway surface and the inner ring-side raceway surface is provided with an array of a plurality of oil reservoirs at intervals in the circumferential direction, the array of oil reservoirs is composed of the plurality of oil reservoirs arranged in the axial direction, and each of the oil reservoirs is composed of sharply-increased parts 14, 23 of which groove depths are sharply increased toward one side in the axial direction, and gradually-increased parts 13, 23 of which groove depths are gradually decreased from the deep parts of the sharply-increased parts 14, 24 toward one side in the axial direction. |
