| 摘要 |
A transmission system including first and second rotatable shafts, and means for transferring drive from one of the shafts to the other shaft including first and second gear wheels each rotatably mounted on the first shaft, and a selector assembly for selectively transmitting torque between the first shaft and the first gear wheel and between the first shaft and the second gear wheel, wherein the selector assembly includes an actuator assembly and first and second sets of engagement members that are arranged to selectively lock the first and second gear wheels for rotation with the first shaft independently of each other, said selector assembly being arranged such that when a driving force is transmitted, one of the first and second sets of engagement members transmits torque between the engaged gear wheel and the first shaft, and the other set of engagement members is then in an unloaded condition, wherein the actuator assembly is arranged to use the unloaded set of engagement members to lock the unengaged gear wheel for rotation with the first shaft to effect a gear change, wherein the selector assembly is arranged such that when the first and second sets of engagement members engage one of the first and second gear wheels the backlash when moving between acceleration and deceleration is less than or equal to four degrees. |
