Hydraulic torque converter with large-torsion lockup clutch

The utility model provides a hydraulic torque converter with a large-torsion lockup clutch and aims to overcome the defects of a large-torsion-angle lockup clutch of an existing hydraulic torque converter. The hydraulic torque converter comprises a pump wheel assembly, a guide wheel assembly, a turbine assembly and a cover assembly. The hydraulic torque converter with the large-torsion lockup clutch is characterized in that a friction plate and a pressure plate are mounted on the upper surface of the pump wheel assembly. A spring frame is mounted on the side, back against the friction plate, of the pressure plate and comprises a riveting plane and annular channels containing multiple damper springs. The damper springs are spiral springs. The riveting plane is a circular ring made of metal. Lower convex arc plates, blades and upper convex arc plates are arranged on the outer circumference of the riveting plane alternately. The annular channels containing the multiple damper springs are formed among the lower convex arc plates, the blades and the upper convex arc plates.