Patent ID: 8029372
Filing Date: 2011-10-04
Classification: F16D,Y10S

Abstract:
1. A constant velocity universal joint, comprising: a hollow outer joint member in which plural guide grooves extending in an axial direction of the outer joint member are formed in an inner peripheral surface, and which is connected to a first shaft; an inner joint member which is connected to a second shaft, and which is housed in the outer joint member; plural leg shafts which is provided in the inner joint member, and each of which protrudes in a radial direction of the second shaft, and in each of which a convex sphere is formed in a tip portion; an inner roller in which a concave sphere that is engaged with the convex sphere of each of the leg shafts is formed in an inner peripheral surface; an outer roller which is housed in each of the guide grooves of the outer joint member so as to be slidable; a rolling body which is provided between the inner roller and the outer roller so that the inner roller and the outer roller are movable with respect to each other in an axial direction of the inner roller and the outer roller, wherein each of the leg shafts and the inner roller can be oscillated with respect to each other; a cylindrical surface is formed in a radially outer surface of the outer roller; a flat engagement surface which is engaged with the cylindrical surface of the outer roller is formed in a lateral surface of each of the guide grooves of the outer joint member; and the cylindrical surface of the outer roller satisfies following two equations,