Plan analysis for the swinging cylinder in the hydraulic wrench;

For the swinging cylinder type of hyd raulic wrench,through the analysi s and calculation for the locating parameters of its executive mechanism,formul a and design precondition of the lo-cating parameters are presented,wi th whic h the minimum of pushing force of the oil cylinder can be achieved under definit e swinging angle and given loosening &tighteni ng torque for the fasteners.