Inner rotor shaft assembly of vacuum pump

The invention belongs to the technical field of vacuum pumps, and particularly relates to a vacuum pump inner rotor shaft assembly. Comprising a driving shaft, multiple stages of driving rotors, a driven shaft and multiple stages of driven rotors, the driving shaft is provided with the multiple stages of driving rotors, and all stages of driving rotors except one stage of driving rotor in the multiple stages of driving rotors are connected with the driving shaft through keys I; the driven shaft is provided with multiple stages of driven rotors, and all stages of driven rotors except one stage of driven rotor in the multiple stages of driven rotors are connected with the driven shaft through keys II. The rotor of each stage is positioned by the key, the other end of the key is mounted on the driving shaft or the driven shaft, and the rotor and the shaft sleeve are split, so that the processing is simple and the replacement is convenient. 本发明属于真空泵技术领域，特别涉及一种真空泵内转子轴组件。包括主动轴、多级主动转子、从动轴及多级从动转子，其中主动轴上设有多级主动转子，多级主动转