CVT transmission

The utility model provides a CVT (continuously variable transmission). The CVT comprises a primary assembly, a secondary assembly and a belt for connecting the primary assembly and the secondary assembly, the primary assembly comprises a driving fixed shaft, and a slope plate, a driving movable disc, a driving spring mounting seat, a belt bearing and a driving fixed disc which are sequentially arranged on the driving fixed shaft in a sleeving manner in the axial direction; the device further comprises a pulley ball arranged between the slope plate and the active moving disc. The driving spring is supported between the driving spring mounting seat and the driving moving disc; wherein the driving movable disc can slide relative to the driving fixed disc; the secondary assembly comprises a driven fixed shaft as well as a driven fixed disc, a driven movable disc and a driven spring mounting seat which are sequentially arranged on the driven fixed shaft in a sleeving manner in the axial direction; the driven sprin