| 摘要 |
PURPOSE:To aim at enhancing the transmission of torque by providing eccentric cylindrical rollers making internally contact with inner pin holes in an external gear, at the outer periphery of inner pins planted on the output rotary shaft side, and by providing an induction member making internally or externally contact with the external contact section of the inner pin. CONSTITUTION:In an epicyclic reduction gear, an input rotary shaft is provided thereto with eccentric members 31, 32 through the intermediary of an eccentric shaft 2, and external gears 51, 52 fitted on the eccentric members are internally meshed with an internal gear 8. Either of inner pins 11 planted on the internal gear 8 or the flange 12 of an output shaft 13 is secured so that decreased or increased rotation is taken out from the other. In this arrangement, eccentric cylindrical rollers 18 makes internally contact with inner pin holes 10 formed in the external gears 51, 52, and teeth on the outer periphery of the externally contact section of the eccentric are meshed with teeth on the outer periphery of the induction member 20 so that all inner pins 11 contribute to the transmission of torque. Thus, it is possible to enhance the transmission of torque, and further it is possible to prevent the inner pins from eccentrically wearing and to enhance the durability and reliability of the epicyclic reduction gear. |
