| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a thrust conical roller bearing to be remarkably low in friction torque. SOLUTION: The raceway surface 4 of one annular bearing ring 2, positioned facing the other annular bearing ring 3, and the raceway surface 5 of the other annular bearing ring 3 are inclined in a taper-form manner to the respective sides opposite to each other. An intersection C1 between the extension line of inclination of one raceway surface 3 and the extension line of inclination of the other raceway surface 5 and a conical cone vertex C2 to form the peripheral surface of a conical roller 6 coincide with each other on the central axis S of a bearing 1 and with a point A in a position separated away from an orthogonal plane to the axial direction of a bearing passing through the center 0 of the spherical part 8 of the conical roller 6. Further, the curvature radius R1 of the spherical part 8 of the conical roller 6 is decreased to a value lower than the maximum radius R2 extending along the peripheral direction of the raceway surface 11 of a floating bearing ring 10 and the curvature radius R3 in a concave shape extending along the axial direction.</p> |
