Novel shaft end locking structure

The invention provides a novel shaft end locking structure for engineering machinery planetary gearboxes, which comprises an output shaft, an output flange, a washer and a blocking nut.The arc-shaped groove of the thread portion at the shaft end of the output shaft and the periphery of the blocking nut are subject to riveting punch at the groove part and are matched with each other to be used, thereby ensuring the reliability of the shaft end locking structure.The washer and the blocking nut are screwed into the thread portion of the shaft end after the installation of the output flange and the output shaft by the engaged spline.After being tightened to a predetermined torque, the locking nut is subject to riveting punch at the groove part to enhance the anti-rotation effect.Meanwhile, the nut can not rotate around the axis of the output shaft, so that the retreat of the nut is avoided.The fastening and anti-rotation capability can be improved by regulating the valve of the torque of the blocking nut and the depth of the riveting punch.By adopting the above structure of the utility model, the operation program is simplified, the work strength is reduced and the assembly quality and efficiency is improved.