Patent ID: 6960151

Claim:
A toroidal continuously variable transmission comprising: a drive shaft which is rotationally driven by a driving source; an input shaft which is disposed adjacent to and coaxially with said drive shaft; an input disk which rotates integrally with said input shaft; an output disk which is disposed coaxially with said input disk so as to be capable of rotating relatively to and so as to face the input disk; a trunnion assembly which is clamped between said input disk and said output disk so that this trunnion assembly is free to swing; a pushing mechanism which pushes said input disk and said output disk in the respective directions that cause these disks to clamp said trunnion assembly; and a rotary connecting mechanism which connects said drive shaft and said input shaft by means of an Oldham coupling; wherein said input disk has a half-doughnut-shaped input-side inside surface with a semicircular cross section, and wherein said output disk has a half-doughnut-shaped output-side inside surface that faces said input-side inside surface in the axial direction, and that has a semicircular cross section, said trunnion assembly is disposed inside a cavity surrounded by said input-side inside surface and said output-side inside surface, and is clamped in a state in which said trunnion assembly contacts said input-side and output-side inside surfaces, and said input disk and said output disk are disposed on said input shaft so that said disks face each other in positions that are coaxial with said input shaft; further comprising a bearing that supports said drive shaft on the housing rotatably; wherein an inner circumferential side recessed part is formed in the central portion of said drive shaft so that this recessed part opens on the side of said input shaft, the tip end portion of said input shaft on the said of said drive shaft is formed so that this tip end portion is inserted into said inner circumferential side recessed part, and a supporting member is provided which is disposed between said tip end portion and said inner circumferential side recessed part and which supports said tip end portion of said input shaft on said drive shaft; and wherein said bearing and said supporting member are disposed in substantially the same position in the axial direction so that these parts overlap in the diametrical direction.