Multi-stage automatic transmission with three planetary gearwheel assemblies

A multi-stage automatic transmission comprising:

• a drive input shaft (AN) and an output drive (AB);
• first, second and third planetary gearwheel assemblies (RS1, RS2, RS3), and first, second, third, fourth and fifth shift control elements (A to E);
• the first, the second and the third planetary gearwheel assemblies (RS1, RS2, RS3) are arranged coaxially in series adjacent one another, and the second planetary gearwheel assembly (RS2) is arranged spatially between the first and the third planetary gearwheel assemblies (RS1, RS3);
• a sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) is securable to a transmission housing (GG) of the multi-stage automatic transmission by the first shift control element (A);
• the drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2);
• the drive input shaft (AN) is connectable to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) by the second shift control element (B) and to a web (ST1) of the first planetary gearwheel assembly (RS1) by the fifth shift control element (E);
• the sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) is fixable to the transmission housing (GG) by the third shift control element © and the web (ST1) of the first planetary gearwheel assembly (RS1) is fixable to the transmission housing (GG) by the fourth shift control element (D);
• the output drive (AB), an annular gearwheel (HO1) of the first planetary gearwheel assembly (RS1) and a web (ST3) of the third planetary gearwheel assembly (RS3) are connected with one another, a web (ST2) of the second planetary gearwheel assembly (RS2) is connected to an annular gearwheel (HO3) of the third planetary gearwheel assembly (RS3), and the web (ST1) of the first planetary gearwheel assembly (RS1) is connected with an annular gearwheel (HO2) of the second planetary gearwheel assembly (RS2);
• wherein the second and the fifth shift control elements (B, E) are combined as a single structural group, the second shift control element (B) has one or more disks (200) actuated by a second actuating device (210), the fifth shift control element (E) has one or more disks (500) actuated by a fifth actuating device (510), a common disk support (ZYLBE) carries the respective one or more disks (200, 500) of the second and the fifth shift control elements (B, E), and the one or more disks (200) of the second shift control element (B) are larger than the one or more disks (500) of the fifth shift control element (E);
• and
• a spur gearing stage (STST) is provided as a final drive output, and a first spur gearwheel (STR1) of the spur gearing stage (STST) is located between and adjacent to both the third planetary gear assembly and an outer wall of the transmission housing (GG) or a housing cover fixed thereto.

A multi-stage automatic transmission comprising:

• a drive input shaft (AN) and an output drive (AB);
• first, second and third planetary gearwheel assemblies (RS1, RS2, RS3), and first, second, third, fourth and fifth shift control elements (A to E);
• the first, the second and the third planetary gearwheel assemblies (RS1, RS2, RS3) are arranged coaxially in series adjacent one another, and the second planetary gearwheel assembly (RS2) is arranged spatially between the first and the third planetary gearwheel assemblies (RS1, RS3);
• a sun gearwheel (SO3) of the third planetary gearwheel assembly (RS3) is securable to a transmission housing (GG) of the multi-stage automatic transmission by the first shift control element (A);
• the drive input shaft (AN) is connected to a sun gearwheel (SO2) of the second planetary gearwheel assembly (RS2);
• the drive input shaft (AN) is connectable to a sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) by the second shift control element (B) and to a web (ST1) of the first planetary gearwheel assembly (RS1) by the fifth shift control element (E);
• the sun gearwheel (SO1) of the first planetary gearwheel assembly (RS1) is fixable to the transmission housing (GG) by the third shift control element © and the web (ST1) of the first planetary gearwheel assembly (RS1) is fixable to the transmission housing (GG) by the fourth shift control element (D);
• the output drive (AB), an annular gearwheel (HO1) of the first planetary gearwheel assembly (RS1) and a web (ST3) of the third planetary gearwheel assembly (RS3) are connected with one another, a web (ST2) of the second planetary gearwheel assembly (RS2) is connected to an annular gearwheel (HO3) of the third planetary gearwheel assembly (RS3), and the web (ST1) of the first planetary gearwheel assembly (RS1) is connected with an annular gearwheel (HO2) of the second planetary gearwheel assembly (RS2);
• wherein the second and the fifth shift control elements (B, E) are combined as a single structural group, the second shift control element (B) has one or more disks (200) actuated by a second actuating device (210), the fifth shift control element (E) has one or more disks (500) actuated by a fifth actuating device (510), a common disk support (ZYLBE) carries the respective one or more disks (200, 500) of the second and the fifth shift control elements (B, E), and the one or more disks (200) of the second shift control element (B) are larger than the one or more disks (500) of the fifth shift control element (E);
• and
• a final drive output is located between and adjacent to both the third planetary gear assembly and an outer wall of the transmission housing (GG) or a housing cover fixed thereto;
• the structural group comprising the second and the fifth shift control elements (B, E) is immediately adjacent to an outer wall of the transmission housing (GG) or a housing cover attached to the transmission housing (GG) and rotationally fixed relative thereto;
• and
• the drive input (AN) and the drive output (AB) shafts are one of on parallel axes and at an angle to one another.