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  The short stress cardan shaft bracket is aimed at the problems of the non rotating support cage used in the production process of line bar, such as the unbalanced gravity of the left and right pull rods, the difficulty of alignment between the connecting shaft and the roll center line, etc. according to the characteristics of the disc spring, such as large rigidity and strong damping and vibration absorption capacity, combined with the principle of lever balance, the disc spring flexible structure is introduced to realize the self balance adjustment of the connecting shaft, so as to solve the problems The above problems have been solved.