Auxiliary tool for drilling center hole in crankshaft

• Main Authors: QU CHUANHU, QIU YANHUA, WANG JINFU, WANG JIBIN, ZHAO DEJUN
• Format: Patent
• Language: Chinese; English
• Published: 30.11.2021
• Subjects: BORING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; TRANSPORTING; TURNING

The utility model relates to an auxiliary tool for drilling a central hole in a crankshaft, which is characterized in that a hollow blind hole is processed in the center of the front end of a taper shank shaft, a step excircle is processed at the excircle shaft of the head, and a boss is arranged; a threaded hole for drilling is formed in the front end of the outer circular shaft of the head of the taper shank shaft, and the center drill and the taper shank shaft are fixed through a set screw. The rear bearing is axially positioned through the boss of the outer circular shaft and the boss of the end cover, and the end cover is connected with the bearing sleeve through a screw; the front bearing is positioned through a boss of the bearing sleeve and a check ring; the taper shank is inserted into the taper shank of the machine tool spindle box, and the machine tool tailstock spindle is in close fit with the taper shank. The center hole drilling device can quickly complete center hole drilling work in time, the