| 摘要 |
<p>PURPOSE:To maintain gear ratios of planetary gear devices in adequate ranges and set speed change ratios of speed change gear stages to values near a geometrical series by using two single pinion type planetary gear devices and a double pinion type planetary gear device and providing six coupling devices. CONSTITUTION:Two single pinion type planetary gears 16 and 18 and a double pinion type planetary gear device 20 are provided. A sun gear 16s and a ring gear 18r and a carrier 20c, a ring gear 16r and a sun gear 20s, and a carrier 18c and a ring gear 20r and an output gear 22 are integrally connected respectively. Clutch means K1-K3 and brake means B1-B3 are connected. Gear ratios r of the planetary gear devices are maintained in adequate ranges of about 0.2-0.6, speed change ratios of the first speed gear stage through the fourth speed change ratios of the first speed gear stage through the fourth speed gear stage can be set to values near a geometrical series, thus a transmission is kept relatively small-sized, and the excellent power performance is obtained.</p> |
