| 摘要 |
<p>The object is to provide a speed-change apparatus wherein the automatic speed change of the conventional gear transmission can be satisfactorily performed by controlling a single motor (9) and a single electromagnetic clutch (21). This apparatus includes a motor (9), an actuator gear (15), a select shaft having a select gear (17) engaging with said actuator gear, a clutch (21), and a sleeve (7) for moving in the axial direction; a shift gear (24) engaging with said actuator gear (15), and a slider connected with said shift gear (24) and connected with said sleeve through a slider bearing and further having a female screw (23A) engaging with a male screw (22) on said select shaft. When said clutch is connected and said select shaft rotates, said slider rotates without the axial movement; and at the shift operation, when said clutch is cut, said female screw may travel forward and reversely against said male screw, and said slider moves in the axial direction.</p> |
