Piston type double-station punching machine with crank-link structure

The utility model discloses a piston type double-station punching machine with a crank-link structure. The piston type double-station punching machine comprises a machine body and two punching stations. The piston type double-station punching machine is characterized in that two piston drive mechanisms are linearly arranged on the machine body, pistons of the piston drive mechanisms are connected through a connecting rod, two racks are arranged on the connecting rod in its lengthwise direction, two gears meshing the racks are also disposed on the machine body, each punching station is provided with a slide groove, a punch slider is movably disposed in each slide groove, each punch slider is connected to the eccentric part of the corresponding gear through a hinge rod, and the hinge rods are hinged to both the gears and the punch sliders. The piston type double-station punching machine has the advantages such that the machine is high in actuating speed and low in cost; clean compressed air is used as an operating medium, and no environmental pollution is caused.