| 摘要 |
PURPOSE: To quickly select between forward gear and reverse gear by combining a reverse gear countershaft gear with a countershaft through a synchronous change-speed clutch, and directly combining a main shaft gear with a drive clutch so as to also mesh with a first gear countershaft gear. CONSTITUTION: An intermediate gear 17 and a first gear countershaft gear 11 mesh with the same mainshaft gear 10, and the countershaft gear 11 is arranged adjacent to a reverse gear countershaft gear 12. As a result, one change- speed clutch 15 can be used for the countershaft gears 11, 12. Further the intermediate gear 17 can be simply fitted to one casing wall. The inner shift condition of a transmission for locking out can be simply made by operating the one change-speed clutch 15 on the reverse gear position and operating a different change-speed clutch 16 on a multi-stage position by which a related gear stage transmits drive torque to an output shaft 21 in both conditions of the reverse gear and a second gear. |
