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The phenomenon of " a huge return for a very small investment " exists everywhere in daily life.Hydraulic jack is a model of " a huge return for a very small investment".
The jack is mainly composed of handle, base, piston rod , cylinder and other parts. Every part plays an important role in the operation of the whole jack, and the operator only needs to output a small force to lift several tons of heavy objects.
The reason why this effect can be achieved is mainly because of two principles.One point is the principle of leverage. By pressing the handle of the jack, our hand-held part is the power arm, and the prying part is the resistance arm. The greater the ratio of the power arm to the resistance arm, the less effort we have to operate.
The second point is the transmission of gears. The large gear is driven by the pinion and then transmitted to the screw to increase the torque and achieve the effect of saving labor. Strictly speaking, the transmission of gears is a deformation of the principle of leverage.
It is precisely under the double labor-saving effect of lever principle and gear transmission that the screw jack brings the "four or two strokes" to the fullest, and solves most of the problems we encounter in our daily life and major projects.
Post time: Jun-10-2022