Cone plate type stepless speed changer

Abstract

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.

Description

technical field [0001] The invention relates to a transmission, in particular to a cone-disk type continuously variable transmission. Background technique [0002] Cone-disk continuously variable transmissions transmit power and movement by means of friction through flexible transmission components clamped between the cone discs, such as rubber belts, steel belts, chains, etc., and are widely used in vehicles, construction machinery and other power machinery . The pressure system and speed regulation system of the cone-disk continuously variable transmission are the key parts of the continuously variable transmission. The friction transmission between the cone disk and the flexible transmission assembly is realized through the pressure system, and the speed change function is realized through the speed regulation system. [0003] Since the advent of continuously variable transmissions, its technical development has always been aimed at the pursuit of transmission efficiency...

AI Technical Summary

Problems solved by technology

However, this continuously variable transmission also has defects and deficiencies. First, the speed regulating mechanism and the pressurizing mechanism are installed on the same movable cone, and the pressurizing part needs to meet the axial movement stroke of the movable cone speed regulation at the same time, resulting in the speed of the transmission. The axial size is large and the structure is not compact enough; second, the pressurization mechanism can only pressurize in one direction and cannot transmit torque in the opposite direction, so it can only be used in the case of one-way transmission of motion and torque

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