| 摘要 |
PROBLEM TO BE SOLVED: To assure a desired distribution of lubricant oil even if a washer restricting an axial movement of an eccentric bearing is arranged.SOLUTION: An eccentric oscillation type gear device of this invention comprises a crank shaft 20 having eccentric segments 20a; an oscillation gear into which the eccentric segments 20a are inserted and cooperated with the eccentric segments 20a through rotation of the crank shaft 20; eccentric segment bearings 28 allowing a relative rotation between the oscillation gear and the eccentric segments 20a to be attained; and washers 30 for restricting an axial movement of the eccentric segment bearings 28. The eccentric segment bearings 28 include a plurality of rollers 42 and a cage 44 for holding the rollers 42. The washers 30 include a narrow width segment 30b with its outer end being positioned at a more inner side in a radial direction than the inner end of the cage 44, and a wide width segment 30c with its outer end being positioned at a more outside in a radial direction than the inner end of the cage 44 and its shape is formed in elliptical shape. |
