Transmission device with secondarily coupled power split

A transmission device (2) with secondarily coupled power splitting, the transmission device (2) comprising:

• a hydrostatic branch (4) and a mechanical branch (5) which are summed by a summing gear system (7) provided in an area of a central transmission shaft (6), and
• at least two transmission ratio ranges in forward and in reverse driving directions such that, within the two transmission ratio ranges, the transmission ratio, in each case, being continuously variable by a hydrostatic variator (3) in an area of the hydrostatic branch (4),
• the central transmission shaft (6), on a transmission input side, being directly coupled to a drive engine (58) and functionally connected both to an auxiliary drive output shaft (45), in a form of a countershaft, and to a hydrostatic shaft (23) of the variator (3), in a form of another countershaft, and also to hydraulic pumps (53 to 55) in an area of the transmission input, and
• the central transmission shaft (6) being coupled to a further hydrostatic shaft (22), in the area of the transmission output (40), in a form of a further countershaft.

A transmission device (2) with secondarily coupled power splitting, the transmission device comprising:

• a hydrostatic branch (4) and a mechanical branch (5) which can be summed together by a summing gear system (7) provided in an area of a central transmission shaft (6),
• at least two forward drive transmission ratio ranges for driving in a forward direction and at least two reverse drive transmission ratio ranges for driving in a reverse direction so that, within each of the at least two forward drive transmission ratio ranges and the at least two reverse drive transmission ratio ranges, a transmission ratio being continuously variable by a hydrostatic variator (3) of the hydrostatic branch (4),
• the central transmission shaft (6) having a transmission input side that is directly connectable to a drive engine (58), and the central transmission shaft (6) being functionally connected to an auxiliary drive output shaft (45), which is a first countershaft, and to one hydrostatic shaft (23) of the variator (3), which is a second countershaft, and also to a plurality of hydraulic pumps (53 to 55) in an area of a transmission input, and
• the central transmission shaft (6) being coupled, in the area of the transmission output (40), to another hydrostatic shaft (22) which is a third countershaft.