Motor through a belt so that the eccentric shaft rotates, the vertical rod that is moving up and down , when the vertical rod upward , driven by two brackets gradually stretched flat , elbows forcing the movable Jaw Crusher  plate to the fixed jaw plate forward, crushing chamber ( ie, by the amount of the fixed jaw plate and moving space consisting ) of ore being squeezed , splitting , folding flexor action and broken . vertical rod downward movement , toggle plate and movable jaw plate by springs and levers of power to the back in this case the port of discharge increases, thereby discharging the crushed ore . visible jaw crusher is divided into periods of crushing ore . eccentric shaft has a turn each half cycle used for crushing , followed by a half cycle for Pai mine . confirmed by practice , this method is suitable for coarse crushing broken , lower cost .