Abstract: The paper introduces the working principle of the eight function test of the equal speed drive shaft, and improves the fixture for a certain internal spline equal speed drive shaft when doing the eight function test, such as easy damage to the outer circle of the mobile knuckle fork and poor clamping, focusing on the design principle, clamping specific, connecting flange, quick disassembly and other aspects of the design of the new fixture to better solve the problems that occur in the clamping of the internal spline equal speed drive shaft, and finally achieves the purpose to improve the testing accuracy and efficiency as well as to obtain higher economic benefits.

Key words: Internal spline; Eight function test; Fixture design; CVJ-side driveshaft

摘要： 论文介绍了等速传动轴八项功能测试的工作原理，针对某内花键等速传动轴在做八功 能检测时，移动节轴叉外圆容易损伤，装夹不良等问题，对夹具进行改进，重点从设计原理、 夹具体、连接法兰、快速拆卸等多个方面设计新的夹具，较好地解决内花键等速传动轴在装 夹时出现的问题，最终达到提高测试精度、效率以及获得更高的经济效益的目的。

关键词: 内花键；八功能测试；夹具设计；等速传动轴