CRANKSHAFT ASSEMBLY WITH POLYGON CRANK PIN

摘要

A crankshaft assembly for a motorcycle includes a first flywheel half with a polygonal-shaped aperture therein and a second flywheel half with a polygonal-shaped aperture therein. The first and second flywheel halves are interconnected by press-fitting opposing first and second polygonal shaped end portions of a crank pin into respective polygonal-shaped apertures of the first and second flywheel half. A bearing is positioned at least partially on a surface of a cylindrical central portion of the crank pin and a connecting rod has an aperture at least partially receiving the bearing.

主权项

1. A motorcycle comprising:
a frame; an engine coupled to the frame; and a polygon crankshaft assembly coupled to the engine comprising:
a first polygon flywheel half with a polygonal-shaped aperture therein;a second polygon flywheel half with a polygonal shaped aperture thereina crank pin including a polygonal-shaped first end portion, a polygonal-shaped second end portion opposite the polygonal-shaped first end portion, and a cylindrical central portion between the first and second polygonal-shaped end portions, wherein the first end portion is press-fit into the polygonal-shaped aperture of the first flywheel half and the second end portion is press-fit into the polygonal-shaped aperture of the second flywheel half;a bearing positioned at least partially on a surface of the cylindrical central portion; anda connecting rod having an aperture at least partially receiving the bearing.