Six-speed automatic gearbox

A multi-speed gearbox, with a drive input shaft (3) connected to a reduction planetary gear set (10), with a drive output shaft (4) connected to a main planetary gear set (30), with first, second, third, fourth and fifth shifting elements (A to E) by the selective engagement of which six forward speeds can be engaged and a gearbox input speed (n_input) of the drive input shaft (3) can be transmitted to drive output shaft (4) in such a manner that of the shifting elements which are actuated for any speed, in order to shift from one speed to a next higher or a next-lower speed, only one shifting element is disengaged and a different shifting element is engaged, such that the main planetary gear set (30) has three uncoupled input elements, an output element of the reduction planetary gear set (10) can be connected, via a first shifting element (A), to a first input element of the main planetary gear set (30) and, via a second shifting element (B), to a second input element of the main planetary gear set (30), the drive input shaft (3) can be connected via, a fifth shifting element (E), to a third input element of the main planetary gear set (30) and an element of the reduction planetary gear set (10) is fixed, the reduction planetary gear set (10) is a plus transmission with inner and outer planetary gear wheels (12, 15) whose webs (14, 17) are coupled to one another;

• wherein an input element of at least one of the first shifting element (A) and the second shifting element (B) is mounted on one of a projection (43) of a gearbox housing wall (41) or on a hub (44) fixed on the gearbox housing wall (41), and
• at least one pressure medium channel for the supply of pressure medium to a servomechanism (51) of the first shifting element (A) is formed in one or more of the projection (43) of the gearbox housing wall (41) and the hub (44) attached to the gearbox housing wall (41).

A multi-speed gearbox, with a drive input shaft (3) connected to a reduction planetary gear set (10), with a drive output shaft (4) connected to a main planetary gear set (30), with first, second, third, fourth and fifth shifting elements (A to E) by the selective engagement of which six forward speeds can be engaged and a gearbox input speed (n_input) of the drive input shaft (3) can be transmitted to drive output shaft (4) in such a manner that of the shifting elements which are actuated for any speed, in order to shift from one speed to a next higher or a next-lower speed, only one shifting element is disengaged and a different shifting element is engaged, such that the main planetary gear set (30) has three uncoupled input elements, an output element of the reduction planetary gear set (10) can be connected, via a first shifting element (A), to a first input element of the main planetary gear set (30) and, via a second shifting element (B), to a second input element of the main planetary gear set (30), the drive input shaft (3) can be connected via, a fifth shifting element (E), to a third input element of the main planetary gear set (30) and an element of the reduction planetary gear set (10) is fixed, the reduction planetary gear set (10) is a plus transmission with inner end outer planetary gear wheels (12, 15) whose webs (14, 17) are coupled to one another;

• wherein the third input element of the main planetary gear set (30) is connected via a web shaft (5) with an output element of the fifth shifting element (E), the first input element of the main planetary gear set (30) is connected via a first sun shaft (6) with an output element of the first shifting element (A), and the second input element of the main planetary gear set (30) is connected via a second sun shaft (7) with an output element of the second shifting element (B), such that the web shaft (5) passes centrally through the main planetary gear set (30), and such that the first sun shaft (6) at least one of runs between the reduction and main planetary gear sets (10, 30) radially above the web shaft (5) and is mounted thereon, and the second sun shaft (7) at least one of runs between the reduction and main planetary gear sets (10, 30) radially above the first sun shaft (6) and is mounted thereon, and
• the second sun shaft (7) is mounted by a mounting plate (45) which is in fixed connection with the gearbox housing (40) or is made as part of the latter.