| 摘要 |
A friction roller type reduction gear is provided with: a sun roller disposed coaxially with an input shaft; a ring roller having a stationary ring roller element and a movable ring roller element; a plurality of intermediate rollers in rolling contact with the outer peripheral surface of the sun roller and with the inner peripheral surface of the ring roller; a connection section for connecting the ring roller and an output shaft; and a loading cam mechanism having a cam ring and changing the contact surface pressure of each rolling contact surface. The outer peripheral surface of the sun roller is a concave surface, and the shape of the outer edge of the outer peripheral surface in an axial cross-section is a single circular arc-shaped concave curve. The outer peripheral surface of each of the intermediate rollers is a convex surface, and the shape of the outer edge of the outer peripheral surface in an axial cross-section is a single circular arc-shaped convex curve. |
