| 摘要 |
A tapered roller bearing has inner and outer races and tapered rollers organized in at least two rows, with the rollers of the one row being generally aligned with the rollers in the other row. The large ends of the rollers are presented toward each other so that the forces which urge the rollers of either row up their tapered raceways are resisted by the rollers of the other row. The end faces of the aligned rollers in the two rows contact each other or else contact rollers of an intervening row. The geometry of the rollers and the raceways along which they roll are such that, when one race rotates relative to the other race, pure rolling contact exists between the side faces of the rollers and the raceways and pure rolling contact also exists at the end faces of the rollers. Moreover, the lines of contact for the aligned rollers of any set are synchronized and the rollers are stable. The rollers of one of the rows are relieved, and this, depending on the configuration of the relieved roller, promotes stability, enables the rollers to transfer radial loads, or renders the bearing highly compact, and it also facilitates the circulation of a lubricant in the bearing |
