| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize and reduce weight while securing durability. SOLUTION: A housing part 11a for constituting a constant velocity joint 10a is provided at the end part of a hub 29 constituting an inner ring equivalent member 31 together with an inner ring 30. The radius of curvature of cross-sectional form of outer engaging grooves 26a, 26a formed at the inner peripheral surface of the housing part 11a and that of inner engaging grooves 25a, 25a formed at the outer peripheral surface of an inner ring 22a provided in the housing part 11a are to be small at each center part and large at both side parts. The major axes of contact ellipses between both side parts and the rolling surfaces of balls 24, 24 are made small to prevent the contact ellipses from reaching chamfer. The imposition of edge load to the rolling surfaces is prevented, and the outer diameters of the respective balls 24, 24 are made small so as to miniaturize and reduce weight based on the decrease of pitch circle diameter. |
