| 摘要 |
PROBLEM TO BE SOLVED: To secure the durability of each disk 16 and each power roller by the structure in which recessed grooves 19, 19 for increasing a coefficient of traction are formed in both the peripheral surface of each power roller and the axial one side surface 17 of each disk 16. SOLUTION: Each power roller side recessed groove and each of respective disk side recessed grooves 19, 19 are opposed to each other at an angle at the rolling contact part between the peripheral surface of each power roller and the axial one side surface 17 of each disk 16 irrespective of the reduction ratio of this toroidal continuously variable transmission. The respective disk side grooves 19, 19 are so formed as to have an angle in the circumferential direction of the disk 16 when viewed from the direction normal to the axial one side surface 17. Each power roller side recessed groove is formed coaxially (or spirally) about the center axis of the power roller. Consequently, the contact area of the rolling contact part is prevented from being reduced irrespective of the reduction ratio. COPYRIGHT: (C)2009,JPO&INPIT
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