Mechanical hydraulic parallel transmission gearbox assembly for harvesting machinery

The utility model belongs to the technical field of agricultural machinery transmission. The mechanical hydraulic parallel transmission gearbox assembly is used for harvesting machinery. The transmission comprises an HST assembly, an input shaft, a first middle shaft, a second middle shaft and an output shaft. The input end of the HST assembly is in transmission connection with the input shaft; aninput gear is sleeved on the input shaft; the output end of the HST assembly is sleeved with a sun gear; an outer gear ring is arranged on the planet inner gear ring, the planet carrier is arranged on the first middle shaft in a sleeved mode, the first middle shaft is sleeved with a first-gear driving gear and a second-gear driving gear, the second middle shaft is sleeved with a first-gear drivengear and a second-gear driven gear, the second middle shaft is sleeved with an output driving gear, and the output shaft is fixedly sleeved with an output driven gear. According to the mechanical hydraulic parallel transmissi