Large and small hole simultaneous tensioning and positioning device for engine connecting rod production

The utility model belongs to the field of connecting rod processing technology application equipment, and particularly relates to a large and small hole simultaneous tensioning and positioning device for engine connecting rod production, which comprises a carrying table, pneumatic clamping jaws for tensioning and positioning a connecting rod are arranged on the carrying table, and the two pneumatic clamping jaws are arranged in parallel into a group and respectively correspond to a large hole and a small hole of the connecting rod. A moving assembly convenient for driving the pneumatic clamping jaw to freely move and adjust is further arranged on the carrying table, the moving assembly comprises a lead screw assembly and a moving carrying plate connected with the lower end of the pneumatic clamping jaw, the lead screw assembly comprises a forward and reverse bidirectional lead screw, and a lead screw nut is arranged on the periphery of the forward and reverse bidirectional lead screw and connected with the mo