| 摘要 |
PURPOSE:To remove a fixed torque characteristic being a weak point in a stepless speed change gear and obtain a fixed output characteristic, by supporting reaction force, acting on a rotary shaft around an axis, by a prime mover. CONSTITUTION:A planet gear 3, 3, being engaged with an input shaft gear 2 while an output shaft inscribing gear 4 integrally formed with an output shaft 5, is supported by a rotary shaft 6 around an axis. The rotary shaft 6, providing bevel gears 19, 19 to be engaged with bevel gears 20 provided in the output shaft 5, is connected with a circumscribing gear 11 through a hollow gear 8 and a hollow shaft 9 by engaging the hollow gear 8 provided in an input shaft 1 with a speed change servomotor gear 7. And the circumscribing gear 11, engaging with an inscribed gear 12 provided in the output shaft 5, is integrally provided with a circumscribed gear 14 through an Oldham's coupling 13, and the circumscribed gear 14 is engaged with an inscribing gear 15. While a bevel gear 17, being provided in the inscribing gear 15, is engaged with the bevel gear 19 provided in the rotary shaft 6.
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