Patent ID: 6848530
Filing Date: 2005-02-01
Classification: B60K,B60Y,F16H

Abstract:
1. A hydro-mechanical transmission apparatus, comprising: an input shaft, an output shaft, a mechanical transmission device having a casing and a differential gear mechanism which is interposed between said input shaft and said output shaft, and a hydro-static transmission device having a casing, a hydraulic pump which is connected to said input shaft, and a hydraulic motor which is connected to said hydraulic pump by a closed circuit as well as to said output shaft through said differential gear mechanism, wherein at least one of said pump and said motor is variable in displacement, wherein: said input shaft and said output shaft are laid out in parallel with each other, said hydraulic pump is connected to one side end in axial direction of said input shaft whereas the other side end of said input shaft is connected to a shaft of a drive source and an input gear of said mechanical transmission device is mounted on between said both ends of said input shaft so as to rotate integrally therewith, said differential gear mechanism is connected to the one side end in axial direction of said output shaft and said hydraulic motor is connected to said one side of said differential gear mechanism, and said casing of said hydro-static transmission device and said casing of said mechanical transmission device are of separate structures, such that said hydro-static transmission device, said mechanical transmission device, said casing of said hydro-static transmission device, and said casing of said mechanical transmission device can be separated from each other.