| 摘要 |
PROBLEM TO BE SOLVED: To prevent shortening of a service life of an oscillation gear by preventing increase of a surface pressure of a tooth surface of the oscillation gear.SOLUTION: An eccentric oscillation type gear device 1 includes an eccentric portion 10a, an oscillation gear 14 having an insertion hole to which the eccentric portion 10a is inserted, and having an external tooth 14a, an outer cylinder 2, and a carrier 4. The outer cylinder 2 is composed of a material having a linear expansion coefficient larger than a material of the oscillation gear 14. The carrier 4 is disposed radially inside of the outer cylinder 2 in a state of holding the oscillation gear 14. The outer cylinder 2 and the carrier 4 are concentrically relatively rotatable by oscillation of the oscillation gear 14 in accompany with rotation of the eccentric portion 10a.SELECTED DRAWING: Figure 1 |
