Synthesis of Structural Schemes of Balance Mechanisms for of a Portal Crane Jib System

Structural schemes for plain linkage balance mechanisms appropriate for application in a portal crane have been synthesized. The synthesis includes the following limitations: saving the configuration of the crane's mechanism used in practice; the pairs must be only of the rotating type; the mechanisms must be second class; the links must be no more than eight; the jib of the crane must make pair with the frame and must be first (guiding) for the balancing mechanism