Device and method for taking out broken bolt

• Main Authors: ZHANG YANGJIE, LIU CHANG, XU QINGQUAN, LIU FEIXIANG, QIAO CHUANG, TAN CI'AN, ZHANG JING
• Format: Patent
• Language: Chinese; English
• Published: 04.02.2020
• Subjects: HAND TOOLS; MANIPULATORS; PERFORMING OPERATIONS; PORTABLE POWER-DRIVEN TOOLS; TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING; TRANSPORTING

The invention discloses a device for taking out a broken bolt. The device for taking out the broken bolt comprises a taking-out shaft for being inserted into a pre-drilled bottom hole in the broken bolt and being in interference fit with the bottom hole, an extension rod for being connected to the taking-out shaft, being inserted into a threaded hole where the broken bolt is located and enabling the taking-out shaft to be driven into the bottom hole under the action of an external force, and a rotating arm which is arranged at the end, away from the taking-out shaft, of the extension rod and used for facilitating the application of a rotating torque to the extension rod, wherein the extension rod has a preset length. According to the device for taking out the broken bolt, after the taking-out shaft and the broken bolt are completely fixed, the unscrewing torque is applied to the broken bolt, the fixing state of the taking-out shaft and the broken bolt is easy to determine (it is indicated that the taking-out