| Final drive assembly in the automobile drive axle is a key part of the automobile drivetrain. Its main function is to increase the input torque and decrease the speed of rotation, and change the transfer direction of the input driving force. Therefore the quality of final drive assembly influences directly the quality of the whole automobile. The automobile test and test equipment is the important method to ensure auto capability, improve auto quality and enhance the competition capacity of market. The paper will research and analyze the integrated of automobile final drive assembly tester.Firstly, the paper introduces the significance and classifying of auto test, and expatiates the indispensability of the equipment for auto test. Then the paper concludes and analyzes the overseas and domestic development state of final drive assembly tester. The following of the paper researches the importance and position of final drive assembly in the automobile drivetrain, then analyze the capability and structure of the final drive assembly and the principle and structure of the differential. Then the paper establishes the test criterion of the final drive assembly to test, according to studying the common test criterion of the final drive and the capability and structure and the working condition of the final drive assembly to test.According to comparing the two final drive assembly test projects of open pattern and electricity-closed pattern, the paper decides finally to use the alternating current frequency conversion closed loading project in the final drive assembly tester. Then the paper introduces the overall arrangement and the framework principle of the final drive assembly tester, and analyzes the working principle and the design method of the driving system and the turning fixture system and the loading system. Then the paper introduces the control software of the tester briefly, analyzes the experimental data and compares with the test criterion.
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