Patent ID: 6137477
Filing Date: 2000-10-24
Classification: G06F

Abstract:
An encoder wheel assembly comprising:a wheel holder having a through hole at one side;a roller pivoted to said wheel holder, said roller comprising a plurality of axially extended teeth spaced around an annular peripheral wall thereof on the inside;a locating frame fastened to said wheel holder on the outside, said locating frame having a through hole aligned with the through hole on said wheel holder, and an opening;an encoder wheel mounted in between said wheel holder and said locating frame, said encoder wheel comprising a wheel, and a shaft extended from the center of said wheel at one side and inserted through the through hole on said wheel holder and turned with said roller, said wheel comprising a wheel pin at the center of one side thereof inserted into the through hole on said locating frame, and a series of notches formed along the circumference thereof corresponding to the opening at said locating frame, said shaft having a plurality of axially extended teeth spaced around the periphery and meshed with the axially extended teeth of said roller; anda spring member mounted around said shaft and stopped between said wheel holder and said wheel to force said wheel toward said locating frame.