| 摘要 |
The present invention relates to a device for extracting a bolt, which is capable of loosening and unthreading a bolt from a counterbore at the same time, and an electric drill including the same. The device for extracting a bolt comprises: a wrench; a fixed ring formed along a circumference of the wrench; a movable ring inserted to the wrench to be able to slide while being spaced from the fixed ring; an elastic member fitted to the wrench and positioned between the fixed ring and the movable ring to provide restoring force for making the movable ring far from the fixed ring in a lengthwise direction of the wrench; and at least two tong units combined to the circumference of the movable ring at the same intervals and elastically coupled to each other to provide restoring force in a direction opposite to a direction in which the tong units are spaced apart from each other, wherein the tong units include: a catching portion located below the bottom end of the wrench and bent inwards to be caught at the bottom end of bolt head; and an inserting portion extending from the catching unit and bent outwards so as to guide the bolt head to be inserted between the tong units. The device for extracting a bolt includes tong units that loosen the bolt and unthread the bolt from a counterbore at the same time, thereby removing inconvenience requiring separate two works of loosening and unthreading the bolt. |
