Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2001-11-14
2004-03-02
Le, Dang (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06700R
Reexamination Certificate
active
06700257
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a bearing fixed ASSEMBLY in a direct current fan, and particularly to an improvement of bearing fixed device in a direct current fan, which provides a closed type oil chamber to enhance the function the bearing in the fan.
2. Description of Related Art
Presently, it is known that the computer is one of required equipment for a personal individual or a company and the user much emphasizes whether the executing speed of the central processing unit is fast or not. However, an extremely high speed during executing the central processing unit may result in an excess high temperature to damage the central processing unit or chips in the computer. In order to reduce the temperature of the central processing unit effectively, a radiator and a fan are carried with the central processing unit.
A conventional fan, as shown in
FIG. 1
, comprises a fan blade unit
10
′, a motor unit
20
′, and a fan base
30
′. The motor unit
20
′ is mounted on the fan base
30
′ and the fan blade unit
10
′ is axially mounted in a spindle seat
31
′ of the fan base
30
′ by way of a spindle
12
′. An oil seal ring
38
a
′, a washer
37
a
′, an oily bearing
34
′, a washer
37
b
′, an oil seal ring
38
b
′, and a retaining ring
32
′ are sequentially mounted around the spindle
12
. The oil seal rings
38
a
′,
38
b
′ and the washers
37
a
′,
37
b
′ constitute sealings for the oiled bearing
34
′, but the structure of the conventional fan is involved in many drawbacks, which are summarized in the following:
1. A lot of components have to be used and it leads to a high material cost with a tedious assembling job so that it results in a high expenditure of labor and working hour.
2. It is unable for the lubrication oil to be stored sufficiently.
3. The lubrication oil is volatilized easily.
4. It is not possible for the bearing to be lubricated sufficiently and it is easy that the bearing becomes out of order with a shortened life span after a period of running.
5. The lubrication oil leaks out and contaminates the fan easily so that it not only makes the label adhered to the fan come off the fan but also causes other component parts being out of order.
SUMMARY OF THE INVENTION
A bearing fixed assembly in a direct current fan according to the present invention comprises a spindle, an oiled bearing, a washer, a retaining ring, and an inner ring to form a closed type oil chamber.
Accordingly, a primary object of the present invention is to provide a bearing fixed assembly in a direct current fan, which has a simple structure with less component parts to save the production and the material costs, and to save labor hours.
Another object of the present invention is to provide a bearing fixed assembly in a direct current fan, with which the lubrication oil may not volatilize easily and can be kept in a state of full amount for the bearing so as to lubricate the component parts thereof sufficiently and to offer the component parts an extended life span.
A further object of the present invention provides a bearing fixed assembly in a direct current fan, which has a closed type oil chamber with a design of leakage proof, so that no component part thereof is contaminated and a label on the fan is unable to come off the fan too.
REFERENCES:
patent: 5610462 (1997-03-01), Takahashi
patent: 6084328 (2000-07-01), Yamashita et al.
patent: 6183221 (2001-02-01), Hsieh
patent: 6356408 (2002-03-01), Nii et al.
patent: 6376946 (2002-04-01), Lee
Asia Vital Components Co. Ltd.
Le Dang
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