| 摘要 |
PROBLEM TO BE SOLVED: To improve shift operability by shortening a push-through stroke of synchronizer rings.SOLUTION: A tip of a chamfer 45 of a synchronizer ring 40 includes a surface 43 which is retreated from an edge 26 of a chamfer 25 of a sleeve 21 and forms a trapezoidal shape in a plan view that is orthogonal to a vertical plane passing through a rotation axis line. Furthermore, the tip of the chamfer 45 of the synchronizer ring 40 includes a first chamfer 45a formed on an outer peripheral side of a boundary ridge line 44, which is positioned at a predetermined height from the bottom of a spline of the synchronizer ring 40, and a second chamfer 45b formed on an inner peripheral side of the boundary ridge line 44 and having a ridge line angle smaller than that of the first chamfer 45a and forms a trapezoidal shape in a side view with respect to the vertical plane passing through the rotation axis line. |
