Gear case transmission accuracy measuring device based on dual servo motor

The utility model relates to a gear case transmission accuracy measuring device based on a dual servo motor. An existing device is low in accuracy, complicated in operation and not comprehensive in measurement. The gear case transmission accuracy measuring device comprises an input/output portion and a measured data acquiring and processing portion. The input/output portion comprises an active servo motor and a load servo motor. An output shaft of the driving servo motor is connected with an input shaft of a gear case through a first precise coupling. An output shaft of the load servo motor is connected with an output shaft of the gear case through a second precise coupling. The measured data acquiring and processing portion comprises an active servoamplifier, a load servoamplifier, a data acquisition card, and a computer. The active servoamplifier and the load servoamplifier are connected with the data acquisition card through communication cables by signals. The data acquisition card and the computer are connected through signals. The servo motor of the device is integrated with an encoder, coaxiality error is low, belt wheel transmission power is not needed so belt wheel transmission error is not brought in, and measurement accuracy is improved.