| 摘要 |
PURPOSE:To transmit swinging rotation at an optional speed ratio in an optional direction, by providing gears on an outer hollow shaft and an inner shaft which constitute a concentric double shaft and by engaging the gears with racks coupled to a piston. CONSTITUTION:A center shaft 1B is inserted in a hollow shaft 1A concentrically thereto so that a rotary double shaft 1 is constructed. The rotary shaft 1 is protruded. A first gear 5A is removably mounted on the end 1A' of the hollow shaft 1A. A second gear 5B is removably mounted on the end 1B' of the center shaft 1B of the rotary shaft 1. A first and a second racks 6A, 6B are provided on the first and the second gears 5A, 5B and coupled to a piston rod 8A through a connecting plate 7. |
