Safe torsion resistant connecting device of transmission testing bench

The utility model relates to a safe torsion resistant connecting device of a transmission testing bench. The safe torsion resistant device comprises two connecting shafts, a protection cover, a switching section and torsion resistant bolts, wherein one end of each of the two connecting shaft is respectively connected with the transmission and the testing bench; the other ends of the two connecting shafts are in transitional fit connection with the switching section through the torsion resistant bolts; torsion resistant sections of which the diameters are smaller than the diameters of the torsion resistant bolts are arranged at the middles of the torsion resistant bolts; the protection cover is mounted outside the switching section; the quantities of two groups of torsion resistant bolts are same; and the torsion resistant bolts are uniformly and circumferentially mounted and are identical in weight, radial mounting position and screwing torque. According to the safe torsion resistant connecting device disclos