Bearing-free variable pitch propeller

The bearingless variable-pitch propeller comprises a right side variable-pitch propeller part, a left side variable-pitch propeller part and a propeller hub, the right side variable-pitch propeller part comprises a right side propeller blade and a tension beam, a propeller handle and a variable-pitch sleeve of the right side propeller blade are fixed to the left end of the tension beam, and the variable-pitch sleeve is installed on an overhanging sleeve of the propeller hub in a clearance fit mode; the tension beam leftwards penetrates into an inner cavity of the propeller hub and is in sliding connection with the propeller hub, the left end of the tension beam and the right end of the tension beam of the left variable-pitch propeller part are hinged to the left end and the right end of a pull rod respectively, the middle of the pull rod is installed on a positioning pin, and the positioning pin is fixed to the middle of the propeller hub in the left-right direction. The right end of the guide plate is connec