Double-row tapered roller bearing for automobile main reducer

The utility model relates to a biserial tapered roller bearing for an automobile main reducer, which belongs to the technical field of rolling bearings, and mainly solves the problems of long distance between two sets of the prior uniline tapered roller bearings and large installation space of a driving bevel gear part. The biserial tapered roller bearing is mainly characterized by the inclusion of a shared outer ring, two paralleled inner rings, and a roller and a holding rack between the outer ring and the inner rings, wherein the width ratio of the outer ring and the inner rings is 0.5:0.8; an oiling groove matched with an automobile axle housing is formed on the outer ring; and oil holes are uniformly formed in the oiling groove. The utility model has the characteristics of reducing the space of the automobile driving bevel gear part, lightening the weight of the axle housing, facilitating the installation and debugging of the bearing and prolonging the service life of the bearing, and is mainly applied t