Analysis of the structure and principle of a continuously variable transmission based on planetary friction

　　The planetary friction type continuously variable transmission is mainly composed of an electric motor, a friction transmission mechanism, a pressure device and a pointer speed control mechanism.The working process of the friction transmission mechanism is that the input shaft drives the sun gear and the pressure plate. The planetary gear is mainly composed of a constant wheel and a pressure ring, which compresses the disc spring to generate friction.

　　The pressure device is mainly composed of a disc spring, which exerts axial force on the pressure plate and the sun gear.The working process of the speed control mechanism is mainly driven by the hand wheel to drive the adjustment screw to allow the end cam to rotate relatively, adjust the position between the constant wheel and the pressure ring, and the working radius between the friction of the pressure ring, which can realize stepless speed change. The speed value is reflected on the indicator.