Patent attributes
A fixed constant velocity universal joint is made compact, has little decrease in load capacity even at an operating angle, and can improve high angle strength and durability through lessening instances in which a ball runs over a track at a high angle. A cage includes four pockets, a pair of long pockets of which a circumferential direction spacing is wide and a pair of short pockets of which the circumferential direction spacing is narrow. The long pockets are shifted by 180 degrees along a circumferential direction and the short pockets are shifted by 180 degrees along the circumferential direction. The long pockets and the short pockets are alternately disposed along the circumferential direction. A long pocket houses two balls. A short pocket houses one ball. An offset amount in the cage is made large to be almost the same as an offset amount of track grooves. Track grooves on a joint inner side are deepened and cage thickness on an opening side is increased.
