Multi-gear powershift transmission

A multi-gear powershift transmission for a working machine with three forward gears and three reverse gears, the powershift transmission comprising:

• a torque converter (1),
• a driveshaft (2),
• a drive output shaft (17);
• first, second, third and fourth countershafts (7, 12, 22, 24);
• first, second, third, fourth and fifth loose wheels (5, 10, 15, 20, 27);
• first, second, third, fourth, fifth, sixth and seventh fixed wheels (3, 8, 13, 18, 23, 25, 29);
• and
• reverse, forward, first, second and third clutches (4, 9, 14, 19, 26);
• wherein the first fixed wheel (3) is fixedly connected to the driveshaft (2) and the first fixed wheel (3) meshes with the second fixed wheel (8) of a forward-gear unit (6) which comprises the second fixed wheel (8), the forward clutch (9) and the second loose wheel (10),
• the first fixed wheel (3), the reverse clutch (4) and the first loose wheel (5) are arranged coaxially with the driveshaft (2) and together form a reverse-gear unit (11),
• the third fixed wheel (13) is fixedly connected to the second countershaft (12) and the third fixed wheel (13) meshes with the first loose wheel (5) arranged coaxially with the first fixed wheel (3) of the driveshaft (2) and with the second loose wheel (10) of the forward-gear unit (6),
• the third fixed wheel (13), the first clutch (14) and the third loose wheel (15) are arranged coaxially with the third fixed wheel (13) and together form a first gear-unit (16),
• the fourth fixed wheel (18) is fixedly connected to the third countershaft (22) and the fourth fixed wheel (18) meshes with the third loose wheel (15) of the first gear-unit (16), and the fourth fixed wheel (18) together with the fifth fixed wheel (23), the second clutch (19) and the fourth loose wheel (20) are all arranged coaxially with the third countershaft (22) and form a second gear-unit (21),
• the fourth loose wheel (20) of the second gear-unit (21) meshes with the third fixed wheel (13) of the first gear-unit (16), and the fifth fixed wheel (23) of the second gear-unit (21) meshes with the fifth loose wheel (27) of a third gear-unit (28), and the fourth loose wheel (20) of the second gear-unit (21) meshes with the sixth fixed wheel (25) of the third gear-unit (28), and the fifth loose wheel (27), the third clutch (26), the sixth fixed wheel (25) and the fourth countershaft (24) together form a third gear-unit (28), and
• the seventh fixed wheel (29) is fixedly connected to the drive output shaft (17), and the seventh fixed wheel (29) meshes with the fourth fixed wheel (18) of the second gear-unit (21).

A multi-gear powershift transmission for a working machine having three forward and three reverse drive gears and comprises a torque converter (1), a driveshaft (2), a drive output shaft (17) and a plurality of countershafts (7, 12, 22, 24), with loose wheels (5, 10, 15, 20, 27), fixed wheels (3, 8, 13, 18, 23, 25, 29) and shift clutches (4, 9, 14, 19, 26) distributed on the driveshaft (2), the drive output shaft (17) and the plurality of countershafts (7, 12, 22, 24),

• wherein the driveshaft (2) is connected in a rotationally fixed manner to a fixed wheel (3) which meshes with a fixed wheel (8) of a forward-gear unit (6) consisting of the fixed wheel (8), a clutch (9) and a loose wheel (10), the fixed wheel (3) of the driveshaft (2), with a clutch (4) and a loose wheel (5) arranged coaxially with the fixed wheel (3) of the driveshaft (2), together form a reverse-gear unit (11), a first further countershaft (12) is connected in a rotationally fixed manner to a fixed wheel (13) which meshes on the one hand with the loose wheel (5) arranged coaxially with the fixed wheel (3) of the driveshaft (2) and on the other hand with the loose wheel (10) of the forward-gear unit (6), the fixed wheel (13) of the first further countershaft (12), with a clutch (14) and a loose wheel (15) arranged coaxially with the fixed wheel (13), together form a first gear-unit (16), and a second further countershaft (22) is connected in a rotationally fixed manner to a first fixed wheel (18) which meshes with the loose wheel (15) of the first gear-unit (16), and the fixed wheel (18) of the second further countershaft (22), with a second fixed wheel (23), a clutch (19) and a loose wheel (20) arranged coaxially with the fixed wheel (18) and the second fixed wheel (23), together form a second gear-unit (21), such that the loose wheel of the second gear-unit (21) meshes with the fixed wheel (13) of the first gear-unit (16), and the second fixed wheel (23) of the second gear-unit (21) meshes with a loose wheel (27) of a third gear-unit (28), and the loose wheel (20) of the second gear-unit (21) meshes with a fixed wheel (25) of the third gear-unit (28), and the loose wheel (27), a clutch (26), the fixed wheel (25) and a third further countershaft (24) together form a third gear-unit (28), and a drive output shaft (17) is connected in a rotationally fixed manner to a fixed wheel (29), this fixed wheel (29) meshing with the fixed wheel (18) of the second gear-unit (21).