Patent ID: 7429230

Claim:
A multi-stage automatic transmission having a front-mounted gearset (VS) as an overdrive planet gearset, a main gearset designed as a multi-member planetary gear and first, second, third, fourth, fifth and sixth shifting elements (A, B, C, D, E, F) which, by selective engagement thereof, a transmission input rotational speed of an input shaft (AN) of the multi-stage automatic transmission can be transmitted to an output shaft (AB) of the multi-stage automatic transmission whereby when changing from one gear to a next following higher or a next following lower gear, of actuated shifting elements, only one additional shifting element is engaged and one of the engaged shifting elements is disengaged; a sun gear (SO_VS) of the front-mounted gearset (VS) is fixed to a transmission housing (GE) of the multi-stage automatic transmission; a web (ST_VS) of the front-mounted gearset (VS) is connected with the input shaft (AN) of the multi-stage automatic transmission; the main gearset has a first, a second and a third rear-mounted gearset (NS 1 , NS 2 , NS 3 ); a sun gear (SO_NS 1 ) of the first rear-mounted gearset (NS 1 ) and a sun gear (SO_NS 2 ) of the second rear-mounted gearset (NS 2 ) are interconnected and can be connected, via a second shifting element (B), with an internal gear (HO_VS) of the front-mounted gearset (VS) and, via a third shifting element (C), with the input shaft (AN); a web (ST_NS 1 ) of the first rear-mounted gearset (NS 1 ) can be fixed, via a fourth shifting element (D), to the transmission housing (GE) and, via a fifth shifting element (E), can be connected with the input shaft (AN); an internal gear (HO_NS 1 ) of the first front-mounted gearset (NS 1 ) and a web (ST_NS 2 ) of the second rear-mounted gearset (NS 2 ) are interconnected and connected with the output shaft (AB); an internal gear (HO_NS 2 ) of the second rear-mounted gearset (NS 2 ) can be fixed, via a sixth shifting element (F), to the transmission housing (GE); a sun gear (SO_NS 3 ) of the third rear-mounted gearset (NS 3 ) is coupled with the sun gear (SO_NS 2 ) of the second rear-mounted gearset (NS 2 ); a web (ST_NS 3 ) of the third rear-mounted gearset (NS 3 ) is coupled with the web (ST_NS 2 ) of the second rear-mounted gearset (NS 2 ); an internal gear (HO_NS 3 ) of the third rear-mounted gearset (NS 3 ) can be connected, via a first shifting element (A), with the internal gear (HO_VS) of the front-mounted gearset (VS); a connecting shifting element (VE) is provided, for connecting the output shaft (AB) and the coupled webs (ST_NS 2 , ST_NS 3 ) of the second and third rear-mounted gearsets (NS 2 , NS 3 ), which, when spatially viewed, penetrates axially between the internal gears (HO_NS 2 , HO_NS 3 ) of the second and third rear-mounted gearsets (NS 2 , NS 3 ) and, when viewed in an axial direction, entirely overlaps radially the internal gear (HO_NS 3 ) of the third rear-mounted gearset (NS 3 ); and the input shaft (AN) and the output shaft (AB) are disposed coaxially with respect to one another.