ANINVESTIGATION ON THE REPLACEMENT OF SPHERICAL PAIR BY CROSS-HEAD PAIR IN SPATIAL MECHANISMS

The spatial RSSR crank rocker mechanism is widely used in industry, but, the manufac-turing, mounting and lubrication of S pair are more complicate than R or C pair. This paperdeals with the replacement of S pair by cress-head pair and investigates the equivalence of thetwo mechanisms with output angular displacement and oscillating angle ψ, as the object func-tion. The synthesis in terms of velocity ratio K and ψ and the influence of the cross-headstructure on the replacement have also been discussed.