| 摘要 |
PURPOSE:To permit fine control for speed change ratio corresponding to input and obtain a compact servomechanism by braking or driving the first or the second screw of a driving element through a harmonic drive mechanism. CONSTITUTION:The second screw 601 which forms a ball screw 60 in correspondence with with the first screw 237 of a movable flange 23B is formed on the inner periphery 611 on the sleeve 61 of the servomechanism 6 of an input pulley 23. Said servomechanism 6 is constituted of a sleeve 61 harmonic reduction gear 62 arranged on the outer periphery of the sleeve 61, wet-type multi- plate electromagnetic down-shift brake 63 arranged between the harmonic reduction gear 62 and a case 10, wet-type multi-plate electromagnetic up-shift brake 64 arranged on one side of the down-shift brake 63, and a planetary gear set 65 arranged between the up-shift brake 64 and the harmonic reduction gear 62. |
