Cutter shaft and ice cream machine

According to the technical scheme, the cutter shaft comprises an inner shaft and a shaft sleeve, the inner shaft is made of metal materials, the shaft sleeve wraps the periphery of the inner shaft, the shaft sleeve and the inner shaft are integrally formed in an injection molding mode, and the periphery of the shaft sleeve is in a polygon prism shape and used for being installed with an alloy sleeve in a matched mode. The periphery of the inner shaft is coated with a layer of plastic shaft sleeve, and the inner shaft and the shaft sleeve are integrally formed, so that the structural strength of the cutter shaft can be kept, noise can be reduced when the cutter shaft and the alloy sleeve slide at a high speed after the cutter shaft and the alloy sleeve are matched, a lubricating structure can be simplified when the cutter shaft and the alloy sleeve are matched, and the stability of a product is ensured; and metal materials are partially replaced by plastic materials, so that the weight of the cutter shaft can