| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an automatic transmission capable of improving control stability of a hydraulic servo, by effectively restraining influence of centrifugal hydraulic pressure acting on the hydraulic servo. <P>SOLUTION: This automatic transmission has an always speed reduction planetary gear 21 outputting rotation of an input shaft 17 by always reducing a speed, a succeeding planetary gear of using its output rotation as input, multiple disc clutches 82 and 83 arranged between an output part 21c of the always speed reduction planetary gear 21 and an input part of the succeeding planetary gear, a clutch piston 61 pressing its clutches, and the hydraulic servo 60 controlling its piston, and is provided by connecting a hub part 80 arranged on the inner peripheral side of the multiple disc clutch 82 to the output part 21c of an always speed reduction planetary gear set 21, and connecting a drum 89 arranged on the outer peripheral side of the multiple disc clutch 83 to the input part of the succeeding planetary gear, and is constituted so that the clutch piston 61 and the hydraulic servo 60 are arranged in a member connected to the hub part 80. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
