Crankshaft oil hole drilling attachment

The utility model relates to an oil hole clamp of a drill crank shaft, which comprises a clamp body, a clamping mechanism, a connecting rod positioning mechanism and a drill frame mechanism, wherein a drill bearing seat, a pressure plate and a changeable cushion block are arranged on the clamping mechanism, the drill bearing seat can be movably mounted on the clamp body, and the pressure plate is mounted on a pressure plate strut on the drill bearing seat through a hinge pin; a hold-down bolt is arranged below the pressure plate, is screwed and penetrates through the pressure plate to abut on the drill bearing seat, and the hold-down bolt is screwed to compact or loose a main journal through the leverage of the pressure plate and the hinge pin on the pressure plate strut; the connecting rod positioning mechanism comprises a positioning column and a backing plate, the positioning column is mounted in a positioning hole of the changeable backing plate, the top of the positioning column bears a connecting rod journal, and the drill frame mechanism comprises a drill bearing seat, a drill plate and a drill sleeve. The utility model has reasonable structure, convenient assembly, low manufacture cost, strong universality and high efficiency of the oil drilling holes, greatly shortens the manufacture period, and is suitable for clamping straight oil holes of various crank shaft drills.