| 摘要 |
PURPOSE: To reduce periodic axial direction force of a constant-velocity joint. CONSTITUTION: A constant-velocity joint has an hollow outer parts 1, an inner parts 2 which exists in the outer parts, three tracks 10 which are distributed around and which are formed in an axial direction, three pins 21 faced outward in a radial direction, and a roll 3 which is rotatably supported around a longitudinal direction axis to each pin and which is pivotally guided from the track of the outer parts 1. The roll 3 is designed integratedly, and is engaged with the track 10 with line contact. A recessed part 31 of the roll 3 is formed in the range of its top part plane surface 9, and a straight or projection chamfer part is also formed. A cutout part is individually arranged thereon in the range of a low part of the track 10.
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