| 摘要 |
<p>A multiple speed ratio power transmission mechanism for an automotive vehicle adapted to be mounted in a transverse position with respect to the fore-and-aft centerline of the vehicle includes a torque input shaft having input gearing fixed thereto. A first countershaft has gearing journalled thereon meshing with the torque input gearing, and synchronizer clutches adapted to be moved selectively to produce a driving connection between the input shaft and the countershaft. A second countershaft has a fifth forward speed gear in meshing engagement with a gear on the input shaft and a synchronizer clutch that can be moved to produce a driving connection between the input shaft and the second countershaft. A differential gear establishes a driving connection between both countershafts and each of two drive wheel axle shafts. First and second shift fork rails are adapted for axial and rotary movement to produce engagement and release of the synchronizer clutches. A shift selector controls the shift shaft and has a relay lever for transferring the motion of the selector shaft directly to the first shift rail, indirectly to the second shift rail through a first bellcrank, and indirectly to a reverse idler through a second bellcrank. An interlock sleeve is mounted on the first shift rail and provides a selector pin for selective engagement directly and indirectly with each of the three shifting forks. A blocking sleeve surrounds the interlock sleeves and prevents engagement of the first shift rail with the unselected shift forks.</p> |
