| 摘要 |
The present invention relates to a dynamic damper equipped with a planetary gear device and a damper spring, and the purpose is to enable expansion of the gear ratio setting range for performing anticipated variation control and to make limitation of size in the radial direction possible. Multiple provided planetary gears (34) have a stepped shape (Ravigneau planetary gear device) and each is obtained from a small diameter pinion (42) and a large diameter pinion (44), which are placed side by side in the axial direction so as to rotate as a unit and which have different numbers of teeth. A large diameter ring gear, a small diameter ring gear, a small diameter sun gear and a large diameter sun gear are able to mesh with the small diameter pinion (42) and the large diameter pinion (44). From the five rotating elements of the large diameter ring gear, the small diameter ring gear, the small diameter sun gear, the large diameter sun gear and a carrier (36) that connects the multiple stepped planetary gears (34), two rotating elements, for example, the large diameter sun gear (38) and the carrier (36), are selected to be the input element and the output element, respectively, and the remaining small diameter sun gear (40) is used as a mass element. |
