Rough turn special fixture of drum hole

The utility model discloses a rough turn special fixture of drum hole, which belongs to the technical field of clamping tools. Its technical essential includes the base, wherein the base middle part is equipped with first counter bore, is equipped with the slip voussoir in first counter bore, be equipped with a plurality of recesses at slip voussoir lateral wall along circumference, the interior bottom surface that is close to slip voussoir axis in the recess is the inclined plane, follows the push rod that radially is equipped with with the recess one -to -one on the base of slip voussoir side, each push rod one end is located corresponding recess, and the other end of each push rod all is connected with the arm lock unit, and the clamp part cooperation of each double wall unit clips the outer wall of treating rough turn brake drum, it treats the support structure of rough turn brake drum to be equipped with the supporting on push rod outlying base, be equipped with the slider cover in slip voussoir periphery, be equipped with the through -hole that suits with each push rod on slider cover lateral wall, the utility model aims at providing a convenient to use, respond well rough turn special fixture of drum hole, be used for cliping the brake drum.