Patent ID: 6692365
Filing Date: 2004-02-17
Classification: F16C,F16D,Y10T

Abstract:
A propeller shaft comprising a tubular shaft main body made of FRP and a metallic yoke having an inserting portion which has serrations having axially extending teeth formed on an outer circumferential surface thereof and mounted on at least one end portion of said shaft main body with said inserting portion being slide fitted into an inner circumferential surface of said one end portion of said shaft main body, whereinsaid shaft main body comprises serration fit-in grooves formed on the inner circumferential surface thereof and having serration fit-in portions into which the teeth of said serrations are allowed to fit and extending portions formed continuously with said serration fit-in portions so as to extend more inwardly from axially central side ends of the teeth of said serrations toward an axial center of said shaft main body, wherein the metallic yoke is capable of entering further into the shaft main body when an axial compression load is applied to the metallic yoke while engaging the serration fit-in grooves of the extending portions; and the metallic yoke insertion portion has an outer diameter that is greater than the inner diameter of the tubular shaft main body prior to insertion, wherein said extending portions of said serration fit-in grooves are formed deeper than said serration fit-in portions.