| 摘要 |
Provided is a power roller unit (22a) the components of which are easily manufactured and managed, and which is easy to assemble, and with which the operation of a half-toroidal continuously variable transmission is stabilized. A trunion (7b) is equipped with inclined rotation shafts (8a, 8b) and a support beam (9b) the insides surface of which is a cylindrical convex surface (23). An outer ring (16b), which forms a thrust rolling bearing (13a) that rotatably supports a power roller (6a) in the support beam (9b), is equipped with a concave part (24) that meshes with the cylindrical convex surface (23), and is equipped with an outer ring raceway (17) and a support shaft (12a). Displacement of the support beam (9b) in the axial direction is restricted by the engagement of a tapered protrusion (30) provided on the inside surface of the support beam (9b) and a tapered concave groove (29) provided in the concave part (24) of the outer ring (16b). In addition, a stepped part (33), which serves as a reference surface when a finishing process is performed on the outer circumferential surfaces of the concave part (24), the concave groove (29), the outer ring raceway (17), and the support shaft (12a), is provided on a portion of the outer circumferential edge on the outside surface of the outer ring (16b). |
