The invention provides a cone plate type stepless speed changer. A driving cone plate and a driven cone plate respectively consist of a pair of movable cone plates and pressurizing cone plates, a pressurizing mechanism consists of an end surface
cam pressurizing mechanism arranged at the back side of at least one pressurizing cone plate in a driving shaft pressurizing cone plate and a driven shaft pressurizing cone plate, a speed regulating mechanism consists of a speed reducing shaft, a hollow screw rod and a screw nut, the hollow screw rod and the screw nut are respectively arranged at the back side of a driving shaft movable cone plate and a driven shaft movable cone plate, the hollow screw rod and the screw nut are of
ball screw structures or sliding spiral structures, through a speed regulating shaft and a constant ratio transmission mechanism, the conversion relationship of the rotation of the speed regulating shaft to the axial movement of the driving shaft movable cone plate and the driven shaft movable cone plate meets a formula that i1=i2, and the driving shaft movable cone plate and the driven shaft movable cone plate are enabled to do synchronous identical-speed and identical-direction movement. The end surface
cam pressurizing mechanism and the speed regulating mechanism of the speed changer are separated in space, the axial dimension of the pressurizing mechanism can be reduced, the positive and reverse two-way pressurization can be realized through the end surface
cam pressurizing mechanism, the pressurizing pressure can be regulated in real time along with the transmission torque, the transmission efficiency is high, the service life of a
system is long, and the reliability is high.