English 
The disc 2 is fixed on the driving shaft. The disc 3 is connected with the driven shaft by a flat key or spline, and can be moved axially on the shaft. The two discs can be pressed tightly by the spring 5. When working, Relying on the friction between the two discs to transmit torque and movement, lever 4 is used to control the coupling and disengagement of the clutch.
