Spline joint coupling structure

The invention relates to a spline joint coupling structure, and relates to the technical field of rotating machinery. According to the spline joint coupling structure, the spline joint coupling structure is designed, a driving shaft and a connected shaft are enabled to be connected through an elastic film coupling and a torque transmitting spline joint, and high-speed torque transmission of the driving shaft and the connected shaft is achieved; the spline joint connected with the elastic film coupling adopts an involute tooth profile, and an inner spline joint and an outer spline joint are easy to assemble through the reasonable design of the intertooth space, so that the spline joints are uniform in stress, stable in transmission and small in vibration through high gear precision and installation precision requirements; and through meshing connection of the inner spline joint and the outer spline joint, the re-instalation during the motor test is facilitated. According to the spline joint coupling structure,