Patent ID: 7381144
Filing Date: 2008-06-03
Classification: F16H

Abstract:
1. A gearbox assembly, in particular for a wheel drive of a vehicle with a hydrostatic gearbox having at least one downstream planetary stage, wherein coupling the planetary stage to the hydrostatic gearbox is via intermediate gearbox means for speed overlap within the planetary stage, by having, according to a first driving mode, a sun gear of the planetary stage in effective interaction with a ring gear of the planetary stage via a first coupling, so that an output speed of the planetary stage is a linear function of an output speed of the hydrostatic gearbox and that, according to a second driving mode, the ring gear is in effective interaction with the hydrostatic gearbox, wherein, at the same time, the sun gear is in effective interaction with a gearbox input shaft via a second coupling so that as a consequence of power distribution, speeds of the ring gear and the sun gear overlap and in that the first coupling is in effective interaction with the ring gear of the planetary stage via a first gearbox stage, and in that the ring gear is in effective interaction with the hydrostatic gearbox via a second gearbox stage, wherein at least one of the first and second gearbox stages stage has a spur gear fixedly mounted on a shaft and the shaft is driven by the hydrostatic gearbox to connect the ring gear and the sun gear of the planetary stage with each other in the first driving mode, wherein the gearbox assembly outputs power via planetary pinion of the planetary stage, said planetary pinion meshing with the sun gear and the ring gear of the planetary stage.