Built-in backlash-free gear angle adjusting device of inclined roller straightening machine

The utility model provides a built-in backlash-free gear angle adjusting device of an inclined roller straightening machine. The built-in backlash-free gear angle adjusting device of the inclined roller straightening machine comprises a straightening roller, a roller base, a machine frame, an eccentric shaft, a transition gear, a speed reducing motor, a semi-gear ring, a box body, a driving gear, a spring, an adjusting bolt, a positioning bearing and a bearing base. The straightening roller is fixed on the roller base through the bearing base and a plurality of groups of bolts, the roller base is positioned on the inner side of the machine frame though the positioning bearing, the outer side of the machine frame is connected with the box body, the driving gear is sleeved on a shaft of the speed reducing motor, the spring and the adjusting bolt are arranged on one side of the shaft of the speed reducing motor, and the driving gear can rotate in a meshing mode through the transition gear, the eccentric shaft an