| 摘要 |
The object is to provide a speed-change apparatus for satisfactorily performing the automatic gear shifting of the conventional gear transmission by controlling two motors. The select mechanism in this apparatus comprises a select stepping-motor 2, a select shaft provided with a select gear meshing with a motor gear 3 for transferring the rotation, a select connecting-means for connecting the select shaft with the select-shift rod of the gear transmission, and a select sensor 6 for detecting an angle of rotation of the select shaft; and the shift mechanism comprises a shift motor 9, an intermediate shaft 12 fixedly having an actuator gear 11 meshing with a motor gear 10 for transferring the rotation, a long actuator gear 13 provided on the periphery of the intermediate shaft 12, a shift shaft provided with a male screw 15 on the periphery thereof, a cylindrical slider 17 provided on the inner periphery thereof with a female screw 16 meshing with the male screw 15 and provided on the outer periphery thereof with a shift gear 14 meshing with the long actuator gear 13, a shift connecting-means coupled with the slider 17 for connecting the slider 17 with the select-shift rod, and a stroke sensor 19 for detecting an amount of the axial movement of the slider 17 or the shift connecting-means. <IMAGE> |
