Analysis of working principle

The working principle of hydraulic spanner can be analyzed from his main body. We can divide the hydraulic wrench into three parts. 

It is composed of three parts. The main parts are the frame and the cylinder and the transmission parts.

 For cylinder it's main function is the function of the output force, when the oil cylinder piston rod up and transmission parts in motion pair, 

the oil cylinder center, however, from it to the distance to the center of the driving part is mainly to enlarge hydraulic wrench lever effect, 

and then we put the oil cylinder output multiplied by the arm, the result is that the theory of hydraulic wrench of the output data, 

But because of the existence of friction resistance, the output result of the actual hydraulic spanner is less than the theoretical output torque.