Patent ID: 7258616
Filing Date: 2007-08-21
Classification: F16D,Y10S

Abstract:
1. A fixed type constant velocity universal joint comprising: an outer joint member having eight arcuate guide grooves extending in the axial direction in an inner spherical surface thereof, an inner joint member having eight arcuate guide grooves extending in the axial direction in an outer spherical surface thereof, eight balls disposed between the guide grooves of the outer joint member and guide grooves of the inner joint member, and a cage interposed between the outer joint member and inner joint member for retaining the balls, wherein the center of the guide grooves of the outer joint member is offset from the center of the inner spherical surface thereof, and the center of the guide grooves of the inner joint member is offset from the center of the outer spherical surface thereof by an equal distance (F) in opposite axial directions, and wherein the relationship of 0.45≦B/A≦0.65 is established, where A represents the wall thickness of the cage, and B represents the difference in radial displacement of balls at a maximum joint angle in the pocket of the cage.