| 摘要 |
POWER TRANSMISSION A countershaft transmission has an input shaft and a coaxial output shaft which are disposed in parallel with a pair of countershafts. The countershafts position and support a floating bearing support which is positioned to support ends of the input and output shafts. The countershafts each have a selectively engageable clutch disposed thereon which selectively control the establishment of drive ratios between the input shaft and the respective countershafts. A plurality of forward and reverse ratios are selectively established, between the input and output shafts through the countershafts, by selectively engaging a plurality of synchronizers. The synchronizers cooperate with a plurality of ratio gears on the countershafts and output shaft to establish the ratios. The ratio gears that establish the lowest forward ratios are fully disengageable from their respective countershafts. |
