| 摘要 |
PURPOSE:To make easier the manufacture of a bendable uniform-motion joint using balls or rollers by forming the inward and outward convexities of both inner and outer wheels joining through the balls, etc., into a linear shape in parallel with a rotary shaft. CONSTITUTION:Inward convexties 4 having two planes 3 in parallel with the rotary shaft of a shaft part 2 are provided at three positions at intervals of approx. 120 deg. to the cylindrical outer wheel 1, and also outward convexties 8 having two planes 7 in parallel with the rotary shaft of a shaft part 6 are likewise provided at three positions at intervals of 120 deg. to the inner wheel 5. These inner and outer wheels 5 and 1 are combined with each other, and balls 9 loosely fitted into each hole 14 of a holder 13 are interposed between the planes 7 and 3. The holder 13 has a large-diameter part 10 with a spherical face centered on the point P separated a fixed distance S from the center O and a small-diameter part connecting with the large-diameter part through a radially directed flat plate 12. The small-diameter part also has a spherical face centered on the point Q separated as much as a fixed distance S in the opposite direction. |
