| 摘要 |
A trunnion (3) of a toroidal continuously variable transmission comprises a pulley (38) having a pulley groove (30) and a notch (37) crossing the pulley groove (38). The trunnion (3) rotates in synchronism with another trunnion by looping an endless wire around the pulley groove of each trunnion (3) and by engaging a large diameter part of the endless wire with the notch (37). After the trunnion (3) is formed by die forging, a rotary tool (90) is first aligned with a boundary interface (31'A, 31'B) between the pulley groove (30) and notch (37). The tool (90) is then rotated while it is moved forward in the axial direction of the tool (90), and the boundary interface (31'A, 31'B) is cut to a predetermined position. <IMAGE> |
