One-way oil-way driven expansion and retraction movement tool

An expansion and retraction movement tool comprising:

• a hydraulic driving structure having a cylinder barrel and a plunger and a shaft rod, the cylinder barrel having an elongated columnar shape with a first end and a second end, the first end and the second end being opposite to each other, the cylinder barrel having an oil chamber therein, the oil chamber housing a working fluid, the plunger being movable within the cylinder barrel and positioned between the oil chamber and the first end, the plunger being adjacent the oil chamber, the plunger being tightly fitted within the oil chamber such that the plunger is movable toward or away from the first end in order change a volume of the oil chamber so as to squeeze or absorb the working fluid, the shaft rod having one end extending into the cylinder barrel so as to form a bearing part, another end of the shaft rod extending through the second end of the cylinder barrel and outwardly of the cylinder barrel, the another end of the shaft rod having a connecting part, the bearing part being opposite the plunger such that the shaft rod is axially movable back-and-forth under a force of the working fluid;
• a pair of elongated arm rods laterally opposite to each other, said pair of elongated arm rods being respectively on opposite sides of the shaft rod, one end of each of said pair of elongated arm rods being respectively pivotable on the cylinder barrel, an opposite end of each of said pair of elongated arm rods being adapted to respectively configure working pieces such that the working pieces can move toward or away from each other;
• a pair of connecting rods respectively pivotable on said pair of elongated arm rods, each of said pair of connecting rods being respectively pivotable with the connecting part, wherein a one-way movement of the shaft rod actuates said pair of elongated aria rods to move back-and-forth by way of said pair of connecting rods;
• and
• an actuating component movable on the cylinder barrel, said actuating component having one end connected to the plunger such that said actuating component causes the plunger to move toward or away from the first end of the cylinder barrel, wherein said actuating component has a flange positioned inside the cylinder barrel, said actuating component being screwed into a center of the plunger such that said actuating component is rotatable so as to cause the plunger to move linearly back-and-forth.