| 摘要 |
<p>PROBLEM TO BE SOLVED: To compactly arrange a multistage transmission of forward 11-speed or forward 12-speed having an excellent gear change property which can set a gear range around 15 by a simple structure.SOLUTION: An output constitution element which can obtain six gear changes or seven gear changes of input shaft rotation by controlling third, fourth and fifth planetary gear rows 30, 40 and 50 of a front-end transmission by first and second clutches C1 and C2 and first, second and fourth brakes B, B2 and B4, and a first constitution element of first and second planetary gear rows 10, 20 having the first, second, third and fourth constitution elements constituting a main gear change mechanism are connected to each other by a connecting shaft 7, the second constitution element can be connected to an input shaft by the third clutch C3, the fourth constitution element can be braked by the third brake B3, and the third constitution element is outputted.</p> |
