Multi-mode hydro-mechanical hybrid transmission device

A multi-mode hydro-mechanical hybrid transmission device, comprising an input member, a hydraulic transmission mechanism, a mechanical transmission mechanism, a convergence mechanism, an output member, a clutch assembly, and a brake assembly,

• wherein the clutch assembly connects an output end of the input member to an input end of the hydraulic transmission mechanism, the mechanical transmission mechanism, and the convergence mechanism, the clutch assembly connects an output end of the hydraulic transmission mechanism to the convergence mechanism, and the clutch assembly connects the mechanical transmission mechanism to the convergence mechanism;
• the convergence mechanism is connected to the output member;
• continuously changing transmission ratios are provided between the input member and the output member by adjusting a displacement ratio of the hydraulic transmission mechanism and selectively controlling an engagement of the clutch assembly and the brake assembly;
• the mechanical transmission mechanism comprises a mechanical transmission output shaft, a left planetary gear train, and a right planetary gear train;
• the left planetary gear train comprises a left sun gear, a left planet carrier, and a left ring gear;
• the right planetary gear train comprises a right planet carrier, a right sun gear, and a right ring gear, wherein the left sun gear is connected to the right sun gear and the right ring gear is connected to the left planet carrier;
• the clutch assembly comprises a fifth clutch and a sixth clutch, wherein the fifth clutch is configured for connecting the right ring gear to the mechanical transmission output shaft and the sixth clutch is configured for connecting the right sun gear to the mechanical transmission output shaft;
• the brake assembly comprises a second brake and a third brake, wherein the second brake is configured for connecting the left ring gear to a fixed member and the third brake is configured for connecting the right ring gear to a fixed member;
• the convergence mechanism comprises a convergence mechanism left planetary gear train and a convergence mechanism right gear train, wherein the convergence mechanism left planetary gear train comprises a convergence mechanism left planet carrier, and a convergence mechanism left sun gear, and a convergence mechanism left ring gear;
• the convergence mechanism right gear train comprises a convergence mechanism right sun gear, a convergence mechanism right planet carrier, and a convergence mechanism right ring gear;
• the convergence mechanism left sun gear is connected to the convergence mechanism right sun gear, and the convergence mechanism left sun gear is connected to the output end of the hydraulic transmission mechanism;
• the convergence mechanism left ring gear is connected to the convergence mechanism right planet carrier;
• the input member is connected to the convergence mechanism left planet carrier through a left gear pair and a right gear pair;
• the convergence mechanism right ring gear is connected to the mechanical transmission output shaft through a mechanical transmission output gear pair, and the convergence mechanism right planet carrier is connected to the output member;
• the clutch assembly further comprises a third clutch, a fourth clutch, and a seventh clutch, wherein the third clutch is configured for connecting the input member to an input end of the convergence mechanism through the left gear pair, the fourth clutch is configured for connecting the input member to the input end of the convergence mechanism through the right gear pair, and the seventh clutch is configured for connecting the convergence mechanism right sun gear to the convergence mechanism right planet carrier;
• the brake assembly further comprises a first brake and a fourth brake, wherein the first brake is configured for connecting the convergence mechanism left sun gear to a fixed member and the fourth brake is configured for connecting the convergence mechanism right ring gear to a fixed member.