| 摘要 |
The invention relates to a double-row roller bearing (1) consisting substantially of an outer bearing ring (2) and an inner bearing ring (3) and of a number of rollers (6) arranged adjacently to one another in two rows (4, 5) between the bearing rings (2, 3), said rollers being retained at an even distance from one another in the circumferential direction by a bearing cage (7). The inside of the outer bearing ring (2) thereby forms an outer raceway (8) for the rollers (6), whilst the outside of the inner bearing ring (3) has two inner raceways (9, 10) between which a movable guide ring (11) is arranged on whose outer cylindrical surface (12) the bearing cage (7) rests and against the lateral surfaces (13, 14) of which one of the end faces (15, 16) of each of the rollers (6) rolls. According to the invention, the guide ring (11) arranged between the inner raceways (9, 10) of the inner bearing ring (3) is divided axially and consists of two part rings (17, 18) that are interconnected by a plurality of intermediate elements made of a shape-memory alloy in such a way that an approximately even axial prestressing can be generated on the rollers (6) of the roller bearing (1) with the guide ring (11) at any operating temperature by automatic alterations in length of the intermediate elements. |
