| 摘要 |
<p>PROBLEM TO BE SOLVED: To allow smooth movement of a ball part and to reduce backlash. SOLUTION: Freely rolling steel balls 14 are interposed between a ball holding part 12a of one joint member 12 and the ball part 13a of another joint member 13. The steel balls 14 are circumferentially arranged in two rows on both sides of an axially perpendicular center C of the ball part 13a, outer sides of each row are held by an outer race 15, and a spacer 16 is interposed between inner sides of each row.</p> |
