TORQUE GENERATING DEVICE FOR TOP DRIVE

摘要

A variable torque generating device for a top drive is disclosed. A variable torque generating device according to an embodiment of the present invention comprises a rack having a hollow hole which a drill pipe inserted is formed and binding grooves which are spaced apart from each other at regular intervals along the circumference, and paddles wherein a binding unit corresponding to the binding groove is formed on one side and which are detachably installed on the rack.