Internal and external spline endurance test device and test method

The invention discloses an internal and external spline endurance test device and a test method, and relates to the technical field of automobile performance detection, the internal and external spline endurance test device comprises a support frame, a controller, a driving member, a torque angle sensor, an output shaft assembly and an input shaft assembly, the output end of the driving part is coaxially and rigidly connected with the torque angle sensor, one end of the output shaft assembly is coaxially and rigidly connected with the torque angle sensor, the other end of the output shaft assembly is provided with an internal spline, the input shaft assembly is provided with an external spline matched with the internal spline, and the driving part and the input shaft assembly are both installed on the supporting frame. And carrying out an endurance test, measuring a gap between the external spline and the internal spline after the test, and observing whether the gap is within a qualified range. The actual wor