| 摘要 |
PURPOSE:To promptly perform speed change operation, in a speed changer provided with plural sets of gear trains with a different speed change shift, by constituting the speed changer in such a manner that when power is transmitted by an optional set of gear trains, the other two sets of gear trains are previously interposed between input and output shafts. CONSTITUTION:A speed changer of one reverse shift and four forward shifts comprises gear trains 6-R, 6-1-6-4 with a different speed change shift, interposed respectively through clutches 7-1-7-3, between an input shaft 2 and output shaft 3. The gear trains 6-R and 6-3 and 6-1 and 6-4 are connected in common respectively to the clutches 7-1, 7-2 on the input shaft 2. In this case, the first and second selective mechanisms 8-1, 8-2 are interposed between each of these two sets of gear trains 6-R, 6-3:6-1, 6-4 and the output shaft 3. Then the selective mechanism 8-1 is constituted by providing a shift gear 13, selectively connecting driven gears 11, 12 to the output shaft 3, while the selective mechanism 8-2 is constituted by providing a one-way clutch 19 and shift gear 20. |
