Package bearing with lubrication ports

Abstract

A multi-row rolling element bearing assembly is provided for use in applications, such as differentials. The rolling element bearing assembly includes an inner race defining at least two inner raceways, an outer race defining at least two outer raceways, and a plurality of rolling elements positioned between the inner and outer raceways formed in at least two rows. The bearing assembly includes a novel lubrication system which reduces the maximum temperature attained by the bearing during operation of the bearing and the time spent at that maximum temperature. The lubrication system includes a forced lubrication port connectable to a forced lubrication system, a secondary lubrication port extending from one of said outer surfaces to said radial inner surface, and a tertiary lubrication port. The forced lubrication system delivers lubricant to the bearing through the forced lubrication port. The bearing is partially submerged in lubricant when installed in an application. The secondary lubrication ports are positioned on the bearing to be submerged in the lubricant, and lubricant flows through the secondary lubrication ports into the bearing to maintain a substantially constant level of lubricant in the bearing during operation of the bearing. The tertiary lubrication port is positioned to be above the level of the lubricant so as not to be submerged. Lubricant which is flung from nearby parts of the machine in which the bearing is mounted can enter the bearing through the tertiary ports. Lastly, the outer race is formed as a one-piece, unitary element and includes an integral flange to mount the bearing in the application as well as the outer races which are formed on the inner surface of the outer race.