| 摘要 |
PROBLEM TO BE SOLVED: To provide a hollow type speed reducing unit in which a wiring can be arranged to pass through this unit, its members can be made simple, and their assembly work becomes easy.SOLUTION: This invention has a structure comprising: a hollow type wave generation unit with its one end being a wave generating unit and having an elliptical storing space; an annular flexible bearing having a rear surface and an outer surface and stored in an elliptical storing space of the hollow type wave generation unit, the outer surface being abutted against the elliptical storing space, and the annular flexible bearing being driven by the elliptical storing space; a flexible wheel having a structure having a flexibility and an annular structure, one end being a rear teeth stage, the rear teeth stage having a rear edge surface and an outer edge surface, a plurality of rear teeth being arranged at the rear edge surface, the outer edge surface being fitted to the rear surface of the annular flexible bearing, and the flexible wheel being driven by the annular flexible bearing; and a rigid wheel having an annular structure, a plurality of outer teeth being arranged at its outer circumferential surface, the number of teeth of the outer teeth and the number of teeth of the rear teeth showing a difference in number, the rigid wheel being fitted to the flexible wheel, and partial outer teeth being engaged with the rear teeth. |
