Torque converter with cover-lock-up clutch

The invention discloses a hydraulic torque converter with a cover-lock-up clutch, a cover-lock-up clutch sub-assembly comprises a cover sub-assembly, a lock-up clutch sub-assembly and a return sub-assembly, one end of a return reed of the return sub-assembly is riveted with a self-punching rivet of the cover sub-assembly, the other end of the return reed is riveted with a piston self-punching rivet, and the cover sub-assembly is connected with the lock-up clutch sub-assembly. The lock-up clutch sub-assembly comprises two friction plates and a driving disc, and the two friction plates are pasted to the two sides of the driving disc respectively. When the lock-up clutch is locked, the double friction plates are attached to the cover sub-assembly. The return sub-assembly enables the lock-up clutch to be in the starting working condition, and the two friction plates are rapidly separated from the piston. The invention has the advantages that: the cover and the piston are provided with the self-punching rivets, an