MAGNETIC TRANSMISSION

The invention discloses a magnetic transmission which includes an inner magnetic ring, an outer magnetic ring, a magnetism adjusting unit, a first driving module, a second driving module and a shifting unit. The inner magnetic ring is fixed and set axially with the magnetism adjusting unit and the outer magnetic ring from inside to outside. The first driving module and the second driving module are to driving the outer magnetic ring and the magnetism adjusting unit. The outer magnetic ring includes a plurality of outer magnet couples and the magnetism adjusting unit includes a plurality of magnetic blocks which are different with the outer magnet couples in amount. The shifting unit controls two driving modules to drive the outer magnetic ring or the magnetism adjusting unit, thereby changing the revolution of the magnetic transmission frictionlessly with the difference of the amount between the outer magnet couples and the permeability blocks.