Patent ID: 8057173
Filing Date: 2011-11-15
Classification: F04D

Abstract:
1. A single-bearing fan structure, comprising: a fan frame including a bearing cup with a bearing received therein, the bearing cup having a first end and a second end, the first end of the bearing cup being provided with a lip portion radially protruded toward a centerline of the bearing cup to bear against the bearing, and the bearing cup being provided on an inner side at a position adjacent to the second end with a groove; a blade hub including a rotary shaft having a proximal end fixedly connected to the blade hub and a distal end inserted into the bearing; a retainer being mounted to the second end of the bearing cup and provided with at least one retaining portion for engaging with the groove; a first elastic element being put around the rotary shaft and located between the blade hub and the bearing, the first elastic element having a first end portion pressed against the blade hub and a second end portion pressed against the bearing; and a second elastic element being received in the bearing cup and located between the bearing and the retainer, and the second elastic element having a third end portion pressed against the bearing and a fourth end portion pressed against the retainer.