The structure of the retaining ring includes a flat retaining ring, an inclined retaining ring and a middle retaining ring. It mainly plays the role of axial fixation, in which the conical surface and the retaining ring are fixed with a high degree of centering. The retaining ring of the rolling bearing is equivalent to a movable retaining edge, which is convenient for installation. The retaining ring is divided into the retaining ring for the hole and the retaining ring for the shaft. The limiting function can prevent the axial movement of other parts. The forming process mostly adopts plate punching, the functional section is tapered, and most of them are 'linear contact' after assembly. Some large-sized models are made by wire winding and punching of excess material. get in touch with'. The fixing of parts on the shaft is divided into axial fixing and circumferential fixing. Axial fixation methods include: shoulder or collar fixation, shaft end retaining ring or conical surface fixation, shaft sleeve fixation, round nut fixation, and elastic retaining ring fixation.