MODULAR-DESIGN GEARBOX AND GEAR IMPLEMENTATION METHOD

The present invention relates to a modular design gearbox and a gear implementation method. The gearbox includes a body, a drive shaft, four intermediate shafts, and an output shaft. The gearbox is of a six-shaft layout. The drive shaft S1, the intermediate shaft S4 and the intermediate shaft S5 are each provided with two clutch packs, and the intermediate shaft S2 is provided with one clutch pack. According to such a structure, a transmission path is short, and stability is better. By means of six shafts and seven clutches, the gearbox achieves a mode of up to eight forward gears and four backward gears, a speed ratio range is wide, and the gearbox can be adjusted flexibly, a less-gear mode can be achieved by reducing some of components, modularization is achieved, universality is improved, and the production cost and use cost of the gearbox are reduced. Moreover, each forward gear is achieved by coupling two clutches and conducting gear engagement four times, each backward gear is achieved by coupling two clutches and conducting gear engagement three times, the transmission path is short, and the reliability is high.