Planetary gear train of automatic transmission for vehicle

A planetary gear train of an automatic transmission for a vehicle, the planetary gear train including:

• a first planetary gear set including three rotation elements having first, second, and third rotation elements, wherein one rotation element of the three rotation elements of the first planetary gear set is connected to an input shaft;
• a second planetary gear set including three rotation elements having first, second, and third rotation elements wherein one rotation element among the three rotation elements of the second planetary gear set is continuously connected to another rotation element of the three rotation elements of the first planetary gear set, and another rotation element among the three rotation elements of the second planetary gear set is selectively connectable to two rotation elements among the three rotation elements of the first planetary gear set;
• a third planetary gear set including three rotation elements having first, second, and third rotation elements wherein one rotation element of the three rotation elements of the third planetary gear set is continuously connected to the another rotation element among the three rotation elements of the second planetary gear set and is selectively connectable to the two rotation elements of the first planetary gear set, and another rotation element among the three rotation elements of the third planetary gear set is continuously connected to a remaining rotation element among the three rotation elements of the second planetary gear set;
• a fourth planetary gear set including three rotation elements having first, second, and third rotation elements wherein one rotation element of the three rotation elements of the first fourth planetary gear set is continuously connected to a remaining rotation element among the three rotation elements of the third planetary gear set;
• a fifth planetary gear set including three rotation elements having first, second, and third rotation elements wherein one rotation element of the three rotation elements of the fifth planetary gear set is continuously connected to another rotation element among the three rotation elements of the fourth planetary gear set, another rotation element among the three rotation elements of the fifth planetary gear set is continuously connected to an output shaft, and one remaining rotation element among the three rotation elements of the fifth planetary gear set is continuously connected to a remaining rotation element of the first planetary gear set;
• a first brake provided to selectively constrain rotation of the another rotation element of the third planetary gear set continuously connected to the remaining rotation element of the second planetary gear set, by connecting the another rotation element of the third planetary gear set continuously connected to the remaining rotation element of the second planetary gear set, to the transmission housing;
• a second brake provided to selectively constrain rotation of one rotation element of the fourth planetary gear set continuously connected to the remaining rotation element of the third planetary gear set, by connecting the one rotation element of the fourth planetary gear set continuously connected to the remaining rotation element of the third planetary gear set to the transmission housing;
• a third brake provided to selectively constrain rotation of one remaining rotation element of the fourth planetary gear set, by connecting the one remaining rotation element of the fourth planetary gear set to the transmission housing;
• a first clutch provided to selectively connect two rotation elements among the three rotation elements of the fifth planetary gear set;
• and
• a second clutch and a third clutch provided to selectively connect the another rotation element among the three rotation elements of the second planetary gear set and two rotation elements among the three rotation elements of the first planetary gear set, respectively.

A planetary gear train of an automatic transmission for a vehicle, the planetary gear train including:

• a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, and a fifth planetary gear set respectively provided with three rotation elements having first, second, and third rotation elements;
• six coupling elements configured to variably provide the first to fifth planetary gear sets with a frictional force;
• and
• first to ninth shafts connected to the three rotation elements of the first to fifth planetary gear sets,
• wherein the first shaft is fixedly connected to the second rotation element of the first planetary gear set and an input shaft;
• wherein the second shaft is fixedly connected to the second rotation element of the fifth planetary gear set and an output shaft;
• wherein the third shaft is fixedly connected to the first rotation element of the first planetary gear set and the first rotation element of the fifth planetary gear set;
• wherein the fourth shaft is fixedly connected to the third rotation element of the first planetary gear set and the second rotation element of the second planetary gear set;
• wherein the fifth shaft is fixedly connected to the third rotation element of the second planetary gear set and the first rotation element of the third planetary gear set;
• wherein the sixth shaft is fixedly connected to the second rotation element of the fourth planetary gear set and the third rotation element of the fifth planetary gear set;
• and
• wherein remaining three shafts among the first to ninth shafts are selectively connectable to a transmission housing.