| 摘要 |
An input disk (19) of a toroidal continuously variable transmission (19) is connected to a rotation shaft (3) via a ball spline structure. Plural power rollers gripped between the input disk (19) and an output disk (20) are disposed at a predetermined angular interval around the rotation shaft (3). A group or groups of spline units (21) forming the ball spline structure respectively comprise pairs of spline grooves (21A) and balls (21B) held inside these grooves. The input disk (19) exerts a thrust load on the power rollers (30) and their reaction force causes the input disk (19) to deform. By forming the ball spline structure from a group or groups of the spline units (21) in which the spline units (21) are disposed at the same angular interval as the power rollers (30),this deformation is prevented from causing the rotation shaft to suffer rotational vibration.
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