Load shift transmission with stepless hydrostatic gearing

A load shift transmission with stepless hydrostatic gearing comprising:

• a five-shaft planetary gear transmission of which a first shaft (1) forms the input shaft, a second shaft (B) transmits rotary power and is operatively connected to the input shaft and through a first hydrostatic displacement machine, which along with a second displacement machine form a steplessly adjustable hydrostatic transmission, a third shaft (E) of the five-shaft planetary gear transmission functions as a slow-running coupling shaft, a fourth shaft (A) functions as a fast-running coupling shaft, and a fifth shaft (C) functions as a startup coupling shaft;
• a stepped planetary gear arrangement mounted on a planet gear carrier and including a first planet gear section which meshes with a first sun gear and with a ring gear, a second planet gear stepped section which meshes with a second sun gear, and a third planet gear stepped section which meshes with a third sun gear, wherein the planet gear carrier is connected to the input shaft, wherein an extension of the first planet gear section forms the second shaft, wherein an extension of the second planet gear section forms the startup coupling shaft, wherein an extension of the ring gear forms the fast-running coupling shaft, and wherein an extension of the third planet gear section forms the slow-running coupling shaft;
• and
• a first plurality of drive gears mounted on the fast running coupling shaft, a second plurality of drive gears operatively connectable to the slow running coupling shaft, and a third plurality of drive gears operatively connectable to the startup coupling shaft, the first, second and third plurality of drive gears being operatively connectable to an output shaft for alternately transferring the rotary power through gear shifting means for connecting a respective one of the plurality of drive gears to the output shaft of the load shift transmission, whereby at a predetermined position of the hydrostatic machine the changing of individual gear shifting means occurs without interruption of tractive power and at synchronous revolution velocities.