Toggle driving structure of punching machine

The toggle driving structure of the punching machine comprises a crankshaft connecting rod, a first swing arm and a second swing arm, the first swing arm and the second swing arm are arranged at the left end and the right end of the crankshaft connecting rod and are in driving connection with the crankshaft connecting rod through a connecting assembly, and the crankshaft connecting rod drives the first swing arm and the second swing arm to move up and down at the same time. The first swing arm and the second swing arm are fixedly connected with the sliding block through the first supporting rod and the second supporting rod respectively, the sliding block is arranged below the first swing arm and the second swing arm, and the first supporting rod and the second supporting rod are the same in structure and are of a rotatable structure. According to the toggle driving structure of the punching machine, the toggle type transmission mechanism is arranged, counter-acting force of punching is dispersed, direct stre