Compound wheel assembling apparatus

A compound wheel assembling apparatus, comprising a tensioning and fixing component and a locating ring, wherein

• the tensioning and fixing component is arranged to extend into a center hole of a hub to tension and fix the hub;
• the tensioning and fixing component comprises a base plate, a flange plate, springs, expanding petals and an expanding core;
• the flange plate is used for placing the hub and is fixed on the base plate;
• through holes are formed in a middle of the flange plate and in a middle of the base plate;
• side walls, facing a center axis of the hub, of the expanding petals are sloped;
• the springs are arranged between the expanding petals and the flange plate;
• when the expanding petals move to an inner side wall of the center hole of the hub, the springs are compressed by the expanding petals;
• the expanding core has slopes on side surfaces of the expanding core, and the slopes of the expanding core are matched with the side walls of the expanding petals;
• the expanding core is configured to move up and down;
• the movement of the expanding core pushes the expanding petals to move toward the inner side wall of the center hole of the hub, and the expanding petals compress the springs and press the inner side wall of the center hole of the hub to fix a position of the hub;
• and
• the locating ring is arranged around the base plate, and has a center axis overlapping a center axis of the base plate;
• the locating ring has a circle of circular-ring-shaped protrusions on an outer side of the locating ring;
• and the circular-ring-shaped protrusions are used for mounting a wheel rim of a wheel or a connection piece of the wheel rim of the wheel.