| 摘要 |
PROBLEM TO BE SOLVED: To provide an eccentric oscillation type gear device which reduces a material cost, maintains the coaxial accuracy of a pair of attachment holes for allowing the crank shafts to be attached thereto and can suppress the deterioration of lives of tools.SOLUTION: In an eccentric oscillation type gear device 1, a portion of one edge part side of a crank shaft 3 is attached to a first attachment hole 5b via a first crank bearing part 63 and a portion of the other edge part side of the crank shaft part 3 is attached to a second attachment hole 5d via a second crank bearing part 64. A first edge plate part 51 includes a bearing support part 51b which constitutes at least a part of the first attachment hole 5b and allows a first crank bearing part 63 to be attached thereto and an edge plate part body 51a as portion other than the bearing support part 51b. The bearing support part 51b is formed with the same material as a second edge plate part 52, and the edge plate part body 51a is formed with a different kind material from the second edge plate part 52. |
