| 摘要 |
A "5x2" compound transmission (10) is disclosed. A main section (12) includes a mainshaft (16) and two countershafts (34;36). The mainshaft has a spool gear (24) rotatably mounted thereon and reverse and four forward gears (26,28,30,32) rotationally fixed thereto. A first clutch (54) splined on the first countershaft (34) couples one of two countershaft gears (42,44) rotatably engaged with a mainshaft gear to the first countershaft. A second clutch (56) splined on the second countershaft (36) couples one of two countershaft gears (48,50) rotatably engaged with the other mainshaft gears to the second countershaft. An auxiliary section (14) includes an output shaft (58) and third (68) and fourth (80) countershafts. The third and fourth countershafts are concentric with the first and second countershafts, respectively, and are rotatably driven by the spool gear. The third and fourth countershafts have gears (64,66,82,84) rotatably engaged with the fourth forward mainshaft gear and an output shaft splitter gear. A third clutch (78) splined on the output shaft couples either a rearwardmost mainshaft gear or the splitter gear to the output shaft. A fourth clutch (76) splined on the mainshaft couples the mainshaft to either the spool gear or the rearwardmost mainshaft gear. A 2x5 embodiment of the compound transmission is also disclosed. <IMAGE> |
