| 摘要 |
PURPOSE:To relax quick deceleration of Geneva gear by using a system in which the transmission shaft of a drive pin to drive the Geneva gear is connected through Oldham's coupler to a drive source, and in the low-speed rotation region of said transmission shaft, said drive pin is coupled with said Geneva gear. CONSTITUTION:When a startup shaft 2 is steadily turned, or continuously turned with equal speed, an eccentric pin 27 is continuously turned with equal speed on the same circumference. On the contrary, a transmission shaft 3 to be turned by the coupling of the eccentric in 27 with a coupling groove 28 is deviated from the startup shaft 2, so that the shaft 3 is turned unsteadily, or turned with unequal speeds. And, the slow angular velocity range of the transmission shaft 3 is matched with the region of transmission work of the Geneva gear 19. Thus, since the coupling range of the drive pin with the Geneva groove is with low- angular velocity in the Geneva gear mechanism, quick acceleration and deceleration become smaller and therefore, the acceleration and deceleration of intermittent turning generated in the output shaft 7 are reduced. |
