Patent ID: 6164159
Filing Date: 2000-12-26
Classification: F16C,Y10T

Abstract:
A motorcycle flywheel assembly, comprising:two weighted flywheels in spaced apart relation, each of the flywheels having a first face, a second face, a concentrically positioned shaft receiving opening and an eccentrically positioned crank pin receiving opening extending therethrough;a forked rod and a blade rod positioned on a common crank pin, the crank pin having threaded nut bearing end portions, non-tapered cylindrical portions adjacent the nut bearing end portion, and a central bearing surface portion, shoulders are defined where the cylindrical portions step down from the central bearing surface portion;the cylindrical portions of the crank pin are positioned in the crank pin receiving openings of the flywheels in interference fit relation with the shoulders defined where the cylindrical portions step down from the central bearing surface portion engaging the first face of each flywheel, thereby precluding flexing movement of the crank pin;nuts secured to each of the threaded nut bearing end portions of the crank pin thereby securing the crank pin to each of the flywheels;several roller bearing assemblies positioned on the central bearing surface portion of the crank pin;the forked rod engaging at least two of the several roller bearing assemblies; andthe blade rod engaging at least one of the several roller bearing assemblies; a rectangular recess frames the shaft receiving opening in the first face of at least one of the flywheels; a shaft is provided that has a square flywheel engaging end, a non-tapered cylindrical portion and a shoulder defined where the square flywheel engaging end and the cylindrical portion meet, the cylindrical portion of the shaft being positioned in the shaft receiving opening of one of the flywheels in interference fit relation, the square flywheel engaging end of the shaft being positioned in interference fit relation within the rectangular recess with the shoulder resting against the first face of the flywheel, thereby precluding flexing movement of the shaft.