| 摘要 |
PURPOSE:To obtain a seal of lubricating oil with less time aging, by juxtaposing a circular separator plate in the side of a wave generator coaxially with a cam plate so as to be prevented from rotating with an external gear and fixing an O-ring to the periphery of the separator plate. CONSTITUTION:A wave generator 4 comprises an oval shaped cam plate 6 connecting a driving shaft 5 to the center and a ball bearing 7 rotating this cam plate 6 relating to an external gear 3, and the bearing 7 comprises an inner ring 8 secured to the peripheral surface of the cam plate 6, outer ring 9 fitted to an internal surface of the gear 3 and many balls 10. The wave generator 4 arranges a separator plate 22 coaxially with the cam plate 6, and the separator plate provides in its center a hole 23 through which the driving shaft 5 is extended. Then an oil seal 24 is provided between the separator plate 22 and the shaft 5, and a clearance between the separator plate 22 and the external gear 3 is tightly sealed by fitting an O-ring 26 to a recessed groove 25 on the peripheral surface of the separator plate 22. |
