Patent ID: 6945904

Claim:
A continuously variable transmission, comprising: an input shaft; an input disk and an output disk each having an inner surface and concentrically mounted on the input shaft so as to rotate relative to each other, the inner surfaces thereof being opposed to each other; a displacement shaft having a support shaft portion and a pivotal shaft portion, the support shaft portion and the pivotal shaft portion are eccentric with each other; a trunnion having a support hole for rotatably supporting the support shaft portion of the displacement shaft, and swinging about a pivot shaft disposed in a twisted position with respect to the input shaft; a first radial bearing rotatably supporting the support shaft portion of the displacement shaft within the support hole of the trunnion; a power roller having an insertion hole for receiving the pivot shaft portion of the displacement shaft, and disposed between the input disk and the output disk; a second radial bearing rotatably supporting the pivot shaft portion within the insertion hole of the power roller; and a thrust bearing including an outer ring disposed between the power roller and the trunnion, and rolling elements held between the outer ring and the power roller, and bearing a thrust load acting on the power roller, wherein a first bottom plate portion is provided at the support hole of the trunnion so as to close an opening of the support hole; wherein a second bottom plate portion is provided at the insertion hole of the power roller so as to close an opening of the insertion hole; wherein the displacement shaft and the outer ring are formed integrally with each other; and wherein the trunnion further has a pair of wall portions formed on an inner surface side thereof, the wall portions being extending substantially perpendicularly to the inner surface of the trunnion so as to form a pocket portion for receiving the power roller, and the wall portions are interconnected by an interconnecting member.