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Universal joint, we have many kinds of common universal joint, whether it is hooker, ball cage, convex block or three pin type, can be simply divided into: constant speed universal joint and non-constant speed universal joint. Here, we will directly distinguish isokinetic and non-isokinetic properties of universal joints through simple analysis.

Among them, when the input and output of Hooke universal joint and the cross shaft are not coaxial, the angular velocity of input and output is not equal. As traditional mechanical, might not pay attention to, but for automobile transmission system, the non uniform impact of speed to affect comfortableness, of course, will affect other parts of life, of course, a lot of friends, colleagues have seen "WuDeRong" professor "universal joint and transmission shaft, detailed calculations prove that all kinds of universal joint in uniform and non uniform.