Patent ID: 7117985
Filing Date: 2006-10-10
Classification: F16D

Abstract:
1. An one-way rotation control mechanism used in a wheel of a golf cart for controlling rotation of said wheel on a wheel axle in one direction, the one-way rotation control mechanism comprising: a bushing mounted on said wheel axle inside said wheel, said bushing comprising a rear big diameter portion, a front small diameter portion, an axial hole axially extended through said rear big diameter portion and said front small diameter portion for the passing of said wheel axle, a collar extended around the periphery thereof between said rear big diameter portion and said front small diameter portion, a locating hole radially extended through said rear big diameter portion across the axial hole of said bushing, and a locating groove extended around the periphery of said front small diameter portion; a pin inserted through the locating hole of said bushing and a radially extended locating hole of said wheel axle to affix said bushing to said wheel axle; an outer cap mounted in one side of said wheel, said outer cap comprising a first circular chamber, a second circular chamber axially connected to said first circular chamber for accommodating a collar of a second bushing, an annular step provided on the inside between said first circular chamber and said second circular chamber and stopped against an outer side of said collar, and a plurality of through holes axially extended through front and rear sides thereof and spaced around said first circular chamber and said second circular chamber; a clutch coupled between said bushing and said wheel, said clutch comprising a flat circular body inserted into said first circular chamber of said outer cap and stopped at an inner side of said collar of said bushing, a plurality of mounting through holes axially extended through said flat circular body and respectively aimed at the through holes of said outer cap, a center opening cut through a center part of said flat circular body for the passing of the front small diameter portion of said bushing, a plurality of protruding portions and recessed portions respectively formed in said flat circular body and alternatively spaced around said center opening, a plurality of springs respectively mounted in said recessed portions, and a plurality of needle rollers respectively mounted in said recessed portions and respectively supported on said springs, said protruding portions each having a smoothly inwardly curved bearing surface kept in contact with the front small diameter portion of said bushing, said recessed portion defining a spring chamber, which receives one said spring, and a needle roller chamber, which receives one said needle roller, said spring chamber having one lateral side terminating in a vertical wall and opposite lateral side disposed in communication with said needle roller chamber, said needle roller chamber having two vertical sidewalls and an inner wall connected between the two vertical sidewalls, said springs each having a first end stopped at the vertical wall of the respective spring chamber and a second end stopped at the periphery of one said needle roller, the distance between the front small diameter portion of said bushing and one end of said inner wall of the needle roller chamber of each said recessed portion of said clutch being greater than the diameter of said needle rollers, the distance between the front small diameter portion of said bushing and an opposite end of said inner wall of the needle roller chamber of each said recessed portion of said clutch being smaller than the diameter of said needle rollers, an inner cap mounted in one side of said wheel opposite to said outer cap; and fastening means mounted in the through holes of said outer cap and the mounting through holes of said clutch to affix said clutch to said inner cap and said outer cap.