Two-way Tapered Roller Bearings

The invention provides a bidirectional conical roller bearing, which comprises retainers, an inner ring, a conical rolling body, an outer ring, an outer ring retaining ring and an inner ring retaining ring. The outer ring comprises an outer ring roller path, the inner ring comprises an inner ring roller path, the retainers are arranged at two ends of each of the outer ring roller path and the inner ring roller path, the outer ring roller path, the inner ring roller path and the retainers form a space containing the conical rolling body, the outer ring retaining ring is mounted on the outer ring and faces a large end face of the conical rolling body, and the inner ring retaining ring is mounted on the inner ring and faces a small end face of the conical rolling body. By the aid of the outer ring retaining ring and the inner ring retaining ring, the conical roller bearing has bidirectional axial force, the same effect can be achieved without two conical roller bearings when the bidirectional axial force is generated, and the bidirectional conical roller bearing can generate less heat when running at a high speed by means of reasonable material arrangement, and can work for a long time under the condition with lean oil or without oil.