| 摘要 |
Disclosed is an automatic transmission. According to an embodiment of the present invention, the automatic transmission comprises: an input shaft to which rotary power is inputted; a drum which outputs shifted rotary power; a first planetary gear set including a first rotary element selectively connected to a transmission housing, a second rotary element selectively connected to the input shaft and to the transmission housing, a third rotary element directly connected to the drum, and a fourth rotary element selectively connected to the input shaft; and a second planetary gear set including a fifth rotary element fixed to the transmission housing, a sixth rotary element selectively connected to the first rotary element, and a seventh rotary element directly connected to the input shaft. |
