Semi-floating drive axle transmission bending composite loading fatigue test tool and test scheme

A transmission bending composite loading fatigue test tool for a semi-floating drive axle comprises a horizontally-extending bottom table, two fixing seats used for supporting the drive axle and two portal frames are arranged in the middle of the upper end of the bottom table, vertically-downward actuators are arranged on cross beams of the portal frames, loading motors are installed on the left side and the right side of the bottom table respectively, and the loading motors are connected with the portal frames. The front side of the bottom table is provided with a driving motor, the left end and the right end of the semi-floating drive axle are respectively fixed on a fixed seat, each end is fixedly connected with a stress device, each stress device is connected with a loading motor through a coupler and is in a suspended state, and each portal frame cross beam is provided with an actuator which is connected with the stress device. The drive motor is connected with the input end of a differential mechanism o