Fan bearing anti-slip fixing structure with bushing

A fan bearing anti-slip fixing structure with a bushing, comprising:

• a fan frame having a base with a bearing tube disposed on the base;
• a shaft having a connecting end connected to a fan impeller and a free end extending into the bearing tube;
• a first bearing and a second bearing located in the bearing tube and disposed on the shaft, each of the first bearing and the second bearing including an inner ring and an outer ring and a plurality of rolling members disposed between the inner ring and the outer ring, the outer ring fitted to the bearing tube, and the inner ring fitted to the shaft;
• a first bushing and a second bushing respectively sleeved on the shaft and located between the inner rings of the first bearing and the second bearing, the first bushing abutting against the inner ring of the first bearing from below, and the second bushing abutting against the inner ring of the second bearing from above;
• a first spring sleeved on the shaft and located between the first bushing and the second bushing, two ends of the first spring respectively abutting against the first bushing and the second bushing to generate an axial elastic supporting force between the inner rings of the first bearing and the second bearing through the first bushing and the second bushing, thereby the inner rings firmly fixed at a predetermined position through the first bushing and the second bushing to restrict radial relative sliding between the inner rings and the shaft during high-speed operation of the fan.