Patent ID: 8123475
Filing Date: 2012-02-28
Classification: F04D

Abstract:
1. A heat dissipation fan comprising: a fan frame comprising a base and a central tube extending upwardly from the base, the central tube defining a central hole therein and comprising an open top end and an open bottom end, the base defining a receiving concave at a bottom surface thereof, the receiving concave being coaxial with the central hole of central tube and communicated with the central hole, a top wall being formed on the base at a top side of the concave, a sidewall being formed between the top wall and the bottom surface of the base and surrounding the concave, a plurality of first locking units extending downwardly from the top wall of the central tube into the receiving concave; a bearing assembly comprising a bearing received in the central hole of the central tube and an oil sealing cover for sealing the open bottom end of the central tube, the bearing defining a bearing hole therein, the oil sealing cover comprising a plurality of second locking units, the second locking units being detachably interlocked with the first locking units to mount the oil sealing cover to the receiving concave of the base; a stator mounted around the central tube; and a rotor comprising a shaft extending through the open top end of the central tube to be received in the bearing hole of the bearing; wherein the oil sealing cover comprises an oil lid, the oil lid comprising a bottom wall pressingly fitted in the receiving concave and an annular wall extending upwardly from the bottom wall into the central hole of the central tube; and wherein each of the first locking units comprises a pole extending downwardly from an inner periphery of the top wall and a hook formed at a bottom end of the pole, each of the second locking units comprising a through hole defined in the bottom wall for a corresponding pole extending therethrough and a fastening strip located out of the through hole for clasping a corresponding hook.