Abstract: A fan bearing retaining structure includes a base and a ring member. The base has a bearing cup projected from one side thereof, and the bearing cup internally defines an axial bore for receiving a bearing therein. The ring member is fitted around an outer side of the bearing cup and defines an opening, such that an inner side of the opening tightly contacts with the outer side of the bearing cup to apply a radially inward compression toward the axial bore. With these arrangements, a portion of the axial bore corresponding to the ring member fitted around the bearing cup has a reduced inner diameter to thereby effectively retain the bearing in the bearing cup, enabling a fan to be manufactured at reduced cost.

Abstract: A fan bearing retaining structure includes a fan base seat having a bearing cup having a bearing hole. An inner circumferential wall of the bearing hole is formed with at least one restriction section and at least one recessed section. At least one elastic member and at least one retainer member are respectively positioned at the restriction section and the recessed section. A bearing is positioned between the elastic member and the retainer member. The elastic member serves to provide elastic force to tightly attach the bearing to the retainer member. Under such circumstance, the bearing is prevented from rotating or sliding within the bearing hole so as to avoid wear or failure of the bearing. Accordingly, the rotor assembly can smoothly operate.

Abstract: A fan bearing retaining structure includes a base and a ring member. The base has a bearing cup projected from one side thereof, and the bearing cup internally defines an axial bore for receiving a bearing therein. The ring member is fitted around an outer side of the bearing cup and defines an opening, such that an inner side of the opening tightly contacts with the outer side of the bearing cup to apply a radially inward compression toward the axial bore. With these arrangements, a portion of the axial bore corresponding to the ring member fitted around the bearing cup has a reduced inner diameter to thereby effectively retain the bearing in the bearing cup, enabling a fan to be manufactured at reduced cost.