Cooling fan
AssigneeHon Hai Precision Industry Co., Ltd.
InventorCHING-HUNG CHU
Life of this patent
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Abstract
A cooling fan for cooling a heat source includes a frame (10), a stator (20) mounted in the frame, a rotor (30) rotatably attached in the frame, a cover (40) fixed on the frame, and a pair of bearings (50, 60) received in the cover and the frame respectively. The rotor includes an impeller and a shaft (36) inserted through the impeller, wherein the shaft has an upper portion being received in one of the pair of bearings in the cover, and a lower portion being received in another one of the pair of bearing in the frame; thus, a vibration of the shaft can be prevented by supports of the pair of bearings, and the rotor is able to maintain a stable rotation, as the cooling fan is in a high speed operation.
Claims16
A cooling fan adapted for cooling a heat source, comprising:
- a frame;
- a lower bearing received in the frame;
- a stator attached in the frame and surrounding the lower bearing;
- a rotor installed in the frame, the rotor comprising:
- a hub enclosing the stator;
- a plurality of blades extending outwardly and radially from the hub;
- and
- a shaft extending through the hub with a lower portion of the shaft being inserted into the lower bearing;
- a cover fixed on the frame to cover the rotor;
- and
- an upper bearing received in the cover to accommodate an upper portion of the shaft therein, wherein when the cooling fan is in operation, supports respectively provided by the lower bearing to the lower portion of the shaft, and the upper portion to the upper portion of the shaft cooperatively prevent the shaft from vibration.
A cooling fan adapted for dissipating heat from a heat source, comprising:
- a frame;
- a stator mounted in the frame, the stator having a plurality of coils for performing a magnet field when given an alternating current;
- an impeller disposed in the frame, the impeller having a magnetic sleeve for being repulsed or attracted by the magnet field to rotate;
- a cover secured on the frame to sandwich the stator and the impeller between the cover and the frame;
- a first bearing being received in the cover;
- a second bearing being received in the frame;
- and
- a shaft extending through the impeller, the shaft having an upper portion being inserted into the first bearing, and a lower portion being inserted into the second bearing, thus the shaft can be supported at two ends thereof by the first bearing and the second bearing respectively.
Dependencies are inferred from the claim text.