Common screw shear, including the base, on the base of fixed knife, turn the set on the fixed knife and to match the fixed knife knife, hinged on the base of the tube and fixed on the base of the tube, the tube set on waist type hole, connection plate is moving blade on one side of the connection, setting of connection plate has a guide pin, guide pin, the waist shape hole on the tube, there hold the screw of the fixed knife set on shear, set up to accommodate the screw and the moving knife to match the constant shear mouth of dynamic shear. Cut the screw in the actual use of time, because the screw is in constant shear and dynamic shear mouth mouth, at the time of shear, screw torque by the shear, for shear and dynamic shear head in order to adapt to a variety of specifications of the screw, usually larger than the screw diameter, screw under the effect of shear torsion is easy to turn, so that after cutting, screw fracture will tilt and uneven, such influence is beautiful and the use of the screw.

The technical problem to be solved by the utility model is to provide a screw shears with smooth and smooth fracture after shearing.

In order to solve the technical problems, the utility model adopts the technical scheme for: a kind of screw cutting, including the base, on the base of fixed knife, turn the set on the fixed knife and to match the fixed knife knife, hinged on the base of the tube and fixed on the base of the tube, the tube set on waist type hole, connection plate is moving blade on one side of the connection, setting of connection plate has a guide pin, guide pin, the waist shape hole on the tube, there hold the screw of the fixed knife set on shear, set up to accommodate the screw and the moving knife to match the constant shear mouth of dynamic shear, described the base through the torsional spring hinge with hook, fixed knife between the moving blade and hook, The upper pipe is provided with a push block that can push the supporting hook to rotate and can rotate the bending part of the supporting hook to a straight line with the fixed and dynamic shear ports.