| 摘要 |
PURPOSE:To prevent the production of cracks with a simple construction by providing a convex groove on the whole circumference of the fan base of a cooling fan. CONSTITUTION:A fan base 2 is provided with a convex groove 5, which is concentric with the revolving center, around the whole circumference. This increases rigidity of the fan base 2, eliminates the deformation in circular direction, strengthens assembly of a cooling fan, shift the resonance point of a cooling fan which is influenced by external vibration, and can prevent the production of cracks in a blade mounting part. |
