Expansion type fixing key for stator of outer rotor traction machine

The invention relates to an expansion type fixing key of non-gear permanent magnet synchronous outer rotor traction machines for elevators, in particular to an expansion type fixing key for a stator of an outer rotor traction machine. Specifically, traditional design of a rectangular key slot is changed, a stator iron core and a machine base of the traction machine are fixed through the expansion type fixing key, and the expansion type fixing key is composed of an expansion body and a taper shaft. The expansion type fixing key is characterized in that four through grooves are formed in the circumferential direction of the expansion body, and the taper shaft is installed on the expansion body. According to the scheme adopted in order to solve the technical problems, the fixing key is designed to be in an inner cone expansion type and can expand in the outer diameter direction under the action of the taper shaft. In order to solve the problems, the expansion type fixing key is of the brand new design, and the f