Patent ID: 7077023

Claim:
A toroidal continuously variable transmission comprising: input and output disks coaxially arranged and opposing each other; a power roller interposed between the input and output disks under axial preload, the power roller comprising a power-roller inner ring kept in contact with the input and output disks, a power-roller outer ring receiving a contact pressure transferred from the input and output disks to the power-roller inner ring under the axial preload, and a power-roller bearing interleaved between the power-roller inner and outer rings; a power-roller support comprising a trunnion having a power-roller accommodating portion that supports the power roller to permit a tilting motion of the power roller about a trunnion axis perpendicular to a rotation axis of the power roller; a roller-and-cage bearing assembly interleaved between the power-roller outer ring and the power-roller accommodating portion to permit a parallel translation of the power roller in an axial direction of the input and output disks, the roller-and-cage bearing assembly comprising: (a) a cage formed with a plurality of roller holes, and (b) a plurality of rollers respectively mounted in the plurality of roller holes, the cage having a portion defining a slotted hole; and a protruded portion attached to the power-roller accommodating portion so that the protruded portion extends from the power-roller accommodating portion toward the cage in a direction of the rotation axis of the power roller; wherein the slotted hole and the protruded portion are loosely fitted to each other to define a predetermined clearance between the slotted hole and the protruded portion, the predetermined clearance being determined to permit a set displacement of the roller-and-cage bearing assembly relative to the trunnion in a direction perpendicular to both the rotation axis of the power roller and the trunnion axis.