Wind driven generator automatically changeable in vane angle

A wind driven generator automatically changeable in vane angle comprises mandrel flanges, torsion springs, bevel mandrels, vanes, vane rib plates, assembly holes, torsion spring fixed end holes, torsion spring moving end screw holes, bearing lock caps and lock cap dowels. The vanes are connected to a main mandrel of the wind driven generator through the mandrel flanges, the torsion springs are arranged at the ends, close to the mandrel flanges, of the bevel mandrels, the front ends of the torsion springs are provided with vane base conical roller bearings, the front ends of the bevel mandrels are provided with the torsion spring fixed end holes close to the rears of the vane base conical roller bearings, the bevel mandrels at the rear ends of the torsion springs are provided with the torsion spring moving end screw holes, and the vane rib plates are connected to the outer ends of the bevel mandrels and provided with the assembly holes. Vane tail-end conical roller bearings are arranged at positions, close to