Hydro-mechanical hybrid transmission device and control method thereof

A hydro-mechanical hybrid transmission device, comprising an input shaft, a split mechanism, a hydraulic transmission assembly, a mechanical transmission assembly, a convergence mechanism, and an output shaft, wherein

• the input shaft is connected, through the split mechanism, to the hydraulic transmission assembly and the mechanical transmission assembly wherein the hydraulic transmission assembly and the mechanical transmission assembly are connected in parallel, and the hydraulic transmission assembly and the mechanical transmission assembly are each connected to the output shaft through the convergence mechanism;
• the split mechanism comprises a clutch C3, a split mechanism sun gear, a split mechanism planet carrier, a split mechanism ring gear, and a brake B1, wherein
• the clutch C3 is connected to the split mechanism sun gear and the split mechanism planet carrier,
• the brake B1 is connected to the split mechanism ring gear,
• the input shaft is connected to the split mechanism sun gear,
• the split mechanism is connected to the hydraulic transmission assembly through the split mechanism ring gear, and
• the split mechanism is connected to the mechanical transmission assembly through the split mechanism sun gear and the split mechanism planet carrier;
• the convergence mechanism comprises a brake B6, a convergence mechanism ring gear, a convergence mechanism planet carrier, a convergence mechanism sun gear, and a clutch C7, wherein
• the brake B6 is connected to the convergence mechanism ring gear,
• the clutch C7 is connected to the convergence mechanism planet carrier and the convergence mechanism sun gear,
• the convergence mechanism is connected to the hydraulic transmission assembly through the convergence mechanism ring gear,
• the convergence mechanism is connected to the mechanical transmission assembly through the convergence mechanism sun gear, and
• the convergence mechanism is connected to the output shaft through the convergence mechanism planet carrier and the convergence mechanism sun gear;
• the hydraulic transmission assembly comprises a hydraulic transmission input clutch C1, a hydraulic transmission input gear pair, a unidirectional variable pump, a hydraulic pipe, a unidirectional quantitative motor, a reverse gear pair, a hydraulic transmission output gear pair, and a hydraulic transmission output clutch C2, wherein
• the unidirectional variable pump is connected to the split mechanism through the hydraulic transmission input gear pair,
• the hydraulic transmission input clutch C1 is arranged between the hydraulic transmission input gear pair and the unidirectional variable pump,
• the unidirectional variable pump is connected to the unidirectional quantitative motor through the hydraulic pipe,
• the unidirectional quantitative motor is connected to the convergence mechanism sequentially through the hydraulic transmission output gear pair and the reverse gear pair, and
• the hydraulic transmission output clutch C2 is arranged between the unidirectional quantitative motor and the hydraulic transmission output gear pair.