Patent ID: 6497621
Filing Date: 2002-12-24
Classification: F16D,Y10S

Abstract:
A constant velocity universal joint having a cylindrical outer member which is connected to a first transmission shaft and which is provided, on its inner wall surface, with a plurality of guide tracks separated from each other by predetermined spacing distances and extending along an axial direction, and an inner member which is connected to a second transmission shaft and which is inserted into an open inner space of said outer member, said constant velocity universal joint comprising:trunnions each of which expands toward said guide track and each of which includes a first curved surface and a second curved surface which are opposed to one another, as well as a spherical surface which surrounds said first curved surface and said second curved surface; first annular members each of which is externally fitted to said trunnion and each of which has a recess having a spherical surface formed on an inner circumferential surface to make surface-to-surface contact corresponding to said spherical surface; second annular members each of which is externally fitted to said first annular member via a bearing member and each of which is provided relatively displaceably with respect to said first annular member along an axial direction of said trunnion; and an attitude-holding mechanism for maintaining an attitude of said second annular member so that said second annular member is substantially parallel to an axial direction of said outer member.