| 摘要 |
An externally toothed gear of a dual-type wave gear device is provided with first and second external teeth (7, 8) having different teeth numbers. The first and second external teeth (7, 8) are bent by a wave generator by the same bending amount, into an elliptical shape. The tooth depth (h1) of tooth profiles (70) of the first external teeth (7) having a low teeth number is smaller than the tooth depth (h2) of tooth profiles (80) of the second external teeth (8) having a high teeth number. Accordingly, a dual-type wave gear device can be achieved with which the first and second external teeth having different teeth numbers can be suitably bent to form excellent mating states with respective internally toothed gears. |
