Coaxial speed changer

Abstract

The invention discloses a coaxial speed changer, relates to a speed changer with coaxial input shaft and output shaft, and aims to provide a coaxial speed changer with the advantages of simple structure, small volume, low cost and low possibility of damage. The coaxial speed changer comprises an inner shaft, a central ring, an outer ring and a transmission member, wherein the inner shaft, the central ring and the outer ring are arranged in turn from the interior to the exterior and are coaxial; an outer edge of the inner shaft and an inner edge of the outer ring are curves which are uniformly provided with a plurality of waves; and the transmission member is arranged in a radial groove on the outer ring and can be contacted with the outer edge of the inner shaft and the inner edge of the outer ring. When the inner shaft rotates, the waves on the outer edge of the inner shaft can push the transmission member to slide outwards along the radial direction, and the transmission member slides outwards and can push the waves on the inner edge of the outer ring so as to drive the outer ring to rotate relative to the central ring, and the transmission ratio of the inner shaft to the outer ring relative to the central ring is determined by the wave number of the outer edge of the inner shaft and the inner edge of the outer ring.

Description

technical field [0001] The invention relates to a transmission device, in particular to a coaxial transmission with an input shaft and an output shaft coaxial. Background technique [0002] The transmission is widely used in machine tools, vehicles and other machines that need to change speed. Its main purpose is to change the transmission ratio between the output end and the input end according to the needs of different situations. At present, the traditional transmission is mainly composed of gears with different diameters. These gears are installed on the driving shaft and the driven shaft, and the meshing transmission between these gears with different diameters is used to change the speed of the driven shaft, thereby realizing the transmission ratio. change. Yet this traditional speed changer must have two parallel axles at least, and when needing larger transmission ratio, just needs to have the gear with larger diameter in the speed changer, so the space that this ki...

AI Technical Summary

Problems solved by technology

Yet this traditional speed changer must have two parallel shafts at least, and when needing larger gear ratio, just needs to have the gear with bigger diameter in the speed changer, so the space that this speed changer takes is bigger, and gear is long-term Under the condition of force, it is easy to cause wear and tear of the teeth, and frequent maintenance or replacement of gears is required. Many factors cause this traditional transmission to have disadvantages such as high cost and short life.

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