TWI509160B - Bearing structure and cooling fan using same - Google Patents

Description

Bearing structure and cooling fan

A bearing structure and a heat dissipating fan thereof, especially a bearing structure in which a shaft hole of a bearing is designed in a non-circular shape to enhance the pressure support of the lubricating grease, thereby reducing the friction between the shaft center and the shaft hole and reducing noise and vibration, and heat dissipation thereof fan.

According to the fact, the use of electronic information products (such as computers) is becoming more and more popular and widely used. As demand drives the rapid development of electronic information industry technology, the development of electronic information is increasing toward the speed of execution and the increase in access capacity. The components in the aforementioned electronic information products often have high temperatures accompanying high-speed operation.

Taking a computer mainframe as an example, the internal central processing unit (CPU) generates a large amount of heat. In addition, when the central processing unit gradually increases in heat, the performance is reduced, and when the heat accumulation is higher than its allowable limit, Will force the computer to crash, in severe cases is more likely to cause damage; and, in order to solve the problem of electromagnetic radiation, usually the chassis is used to close the computer, so that the central processing unit and other heating components (or The rapid export of the thermal energy of the component has become an important issue.

Generally, the central processing unit is configured to solve the heat dissipation method by disposing a heat sink and a heat dissipation fan thereon, and one side of the heat sink is configured with a plurality of fins on the other side of the heat sink (there is no fin) The surface of the sheet directly contacts the central processing unit to conduct thermal energy to the fin end, and the heat is quickly dissipated by radiating heat and cooperating with the fan to force the air flow.

The cooling fan has a base and a rotor set, the base has an axis a cylinder, and at least one bearing is disposed inside the shaft cylinder, and a lubricating grease is filled between the shaft cylinder and the bearing, the bearing has a shaft hole, the outer sleeve of the shaft cylinder is sleeved with a certain subgroup, and the rotor group has a hub The hub has a plurality of blade bodies and a shaft, the shaft is inserted into the shaft hole of the bearing, and when the cooling fan is running, the shaft of the rotor group rotates relative to the bearing, and the shaft rotates When the supporting pressure of the lubricating oil is uneven and insufficient, the shaft impacts the inner wall surface of the shaft hole of the bearing to generate noise and vibration, which causes the rotor group to operate unsmoothly, and the life of the cooling fan is reduced or severely damaged.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a bearing structure in which a bearing shaft hole is designed in a non-circular shape to reduce noise and wear and vibration during use.

A secondary object of the present invention is to provide a cooling fan in which the shaft hole of the bearing is designed to be non-circular, thereby reducing noise, wear and vibration during use.

In order to achieve the above object, the present invention provides a bearing structure, comprising: a body; the body has a shaft hole, the shaft hole is configured by an axial extension of the body, and the shaft hole has at least one extension portion in the radial direction, and the shaft hole The extension is also configured to extend axially toward the body and is coupled to the shaft bore.

In order to achieve the above object, the present invention provides a heat dissipating fan, comprising: a base, a certain subgroup, a bearing structure, and a rotor set; the base has a shaft cylinder, the shaft cylinder has an accommodation space, and the housing a space axially extending through the shaft barrel; the stator assembly is sleeved on the outside of the shaft cylinder; the bearing structure is disposed in the accommodating space of the shaft cylinder, and the bearing structure has a body having an axis a hole, the shaft hole is configured by an axial extension of the body, and the shaft hole has at least one extending portion in a radial direction, the shaft hole is in a non-circular shape, and the extension portion is also in the axial direction of the body An extended configuration is coupled to the shaft bore; the rotor assembly has a hub having a plurality of blades and at least one shaft centered through the shaft bore.

Through the bearing structure of the present invention and the heat dissipating fan, when the cooling fan is running, the shaft hole of the bearing structure is non-circular, so that the supporting force of the lubricating oil between the shaft center and the bearing can be improved to avoid friction loss. And the occurrence of noise and vibration, which in turn increases the life of the bearing and the shaft and the cooling fan.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

1 and 2 are a perspective view and a plan view of a first embodiment of the bearing structure of the present invention. As shown, the bearing structure 1 includes a body 11; the body 11 has a shaft hole 111. The shaft hole 111 is configured to extend axially from the body 11 , and the shaft hole 111 has at least one extending portion 112 in the radial direction, and the extending portion 112 is also configured to extend in the axial direction of the body 11 , and Connected to the shaft hole 111.

The extending portion 112 further has a first groove portion 1121 and a second groove portion 1122. The first and second groove portions 1121 and 1122 extend from the radial direction of the shaft hole 111 to the opposite direction of the shaft hole 111. The first and second groove portions 1121, 1122 are connected to the shaft hole 111 such that the shaft hole 111 has a non-circular cross section, and the non-circular shape may be an ellipse and an egg shape and a lime ( In the form of a lemon, the present embodiment is illustrated by an ellipse, but is not limited thereto.

Please refer to Figures 3 and 4, which are the three-dimensional embodiment of the bearing structure of the present invention. And the top view, as shown in the figure, the partial structure of the present invention is the same as that of the first embodiment described above, and therefore will not be described again here. However, the difference between the present embodiment and the first embodiment is that the extension portion 112 has a more a first groove portion 1121 and a second groove portion 1122. The first and second groove portions 1121 and 1122 are configured by extending the radial direction of the shaft hole 111 in a direction opposite to the shaft hole 111. The first and second portions are configured. The slot portions 1121, 1122 are connected to the shaft hole 111. The shaft hole 111 has a non-circular cross section, and the first and second groove portions 1121 and 1122 are two semicircular circles which are different from each other by about 180 degrees and are eccentric. Settings.

Please refer to FIGS. 5 and 6 for a perspective view and a plan view of a third embodiment of the bearing structure of the present invention. As shown in the figure, the partial structure of the present invention is the same as that of the first embodiment described above, and therefore will not be further described herein. The difference between the embodiment and the first embodiment is that the extending portion 112 extends axially toward the body 11 and extends through the body 11. The first slot portion 1121 and the second slot portion 1122 and a third portion are further provided. The groove portion 1123, the first, second, and third groove regions 1121, 1122, and 1123 are configured by extending the radial direction of the shaft hole 111 in a direction opposite to the shaft hole 111. The first, second, and third groove regions 1121 The axis holes 111 are connected to the shaft hole 111. The shaft holes 111 are non-circular in cross section, and the first, second and third groove portions 1121, 1122, and 1123 are three circular wedges which are different from each other by about 120 degrees.

FIG. 7 is a cross-sectional view showing a fourth embodiment of the bearing structure of the present invention. As shown in the figure, the partial structure of the present invention is the same as that of the first embodiment described above, and thus will not be described herein again, but the present embodiment and the present embodiment The difference between the foregoing first embodiment is that the body 11 further has a first extending end 12, the first extending end 12 is configured by extending from one end of the body 11, and the first extending end 12 has a first pass. The hole 121 communicates with the shaft hole 111, and the first through hole 121 is circular or non-circular, and the embodiment is circular. As an illustration, it is not limited.

FIG. 8 is a cross-sectional view showing a fifth embodiment of the bearing structure of the present invention. As shown in the figure, the partial structure of the present invention is the same as that of the first embodiment described above, and thus will not be described herein again, but the present embodiment and the present embodiment The difference between the foregoing first embodiment is that the body 11 further has a first extending end 12 and a second extending end 13. The first and second extending ends 12 and 13 are respectively configured by extending from opposite ends of the body 11. The first extending end 12 has a first through hole 121, and the second extending end 13 has a second through hole 131. The first and second through holes 121 and 131 communicate with the shaft hole 111. The two through holes 121 and 131 are circular or non-circular, and the embodiment is illustrated by a circle, but is not limited thereto.

FIG. 9 is a perspective view of a first embodiment of the present invention. The heat dissipation fan 2 includes a base 21, a certain subset 22, and a first embodiment. The bearing structure 1 and a rotor assembly 23; the base 21 has a shaft cylinder 211. The shaft cylinder 211 has an accommodating space 212. The accommodating space 212 extends axially through the shaft barrel 211.

The stator assembly 22 is sleeved outside the shaft barrel 211.

The bearing structure 1 can be applied to the bearing structure 1 embodiment disclosed in the first to fifth embodiments, and the bearing structure 1 disclosed in the foregoing embodiments is omitted, and details are not described herein again.

The rotor group 23 has a hub 231 having a plurality of blades 232 and at least one axis 233. The shaft 233 is disposed through the shaft hole 111 and has lubricating grease 3 therebetween.

FIG. 12 is a perspective exploded view of the second embodiment of the heat dissipation fan of the present invention. This embodiment has the same structure as that of the first embodiment, and therefore will not be described herein again. However, the present embodiment and the first embodiment The difference between the embodiments is that the stator set 22 has a plurality of coils 221 and at least one silicon steel sheet 222, and the coils 221 are disposed outside the silicon steel sheet 222.

FIG. 13 is a perspective exploded view of the third embodiment of the heat dissipation fan of the present invention. This embodiment has the same structure as that of the foregoing first embodiment, and therefore will not be described herein again, but the embodiment and the first embodiment. The difference between the embodiments is that the stator set 22 has a plurality of coils 221 and a magnetic conductive metal 223, and the coils 221 are disposed outside the magnetic conductive metal 223.

FIG. 14 is a perspective exploded view of the fourth embodiment of the heat dissipation fan of the present invention. This embodiment has the same structure as that of the foregoing first embodiment, and therefore will not be described herein again. However, the present embodiment and the first embodiment The difference between the embodiments is that the stator set 22 has a plurality of coils 221 and a circuit board 224, and the coils 221 are wound around the circuit board 224.

FIG. 15 is a cross-sectional view of the first embodiment of the heat dissipation fan of the present invention. As shown, the shaft 233 is inserted into the shaft hole 111 of the body 11, and the shaft 233 and the shaft 233 are The shaft hole 111 corresponds to the extending portion 112. Since the shaft hole 111 has a non-circular design, the lubricating oil 3 filled between the shaft hole 111 of the body 11 and the extending portion 112 and the shaft center 233 can be added. The supporting pressure, when the cooling fan 2 is in operation, causes the shaft center 233 to be suspended in the shaft hole 111, so that the shaft center 233 does not collide with the shaft hole 111, thereby reducing noise, friction and vibration. ,Big The width of the cooling fan 2 is increased.

1‧‧‧ bearing structure

11‧‧‧Ontology

111‧‧‧Axis hole

112‧‧‧Extension

1121‧‧‧First trough area

1122‧‧‧Second trough area

1123‧‧‧3rd trough area

12‧‧‧First extension

121‧‧‧First through hole

13‧‧‧Second extension

131‧‧‧Second through hole

2‧‧‧ cooling fan

21‧‧‧Base

211‧‧‧ shaft tube

212‧‧‧ accommodating space

22‧‧‧stator group

221‧‧‧ coil

222‧‧‧矽Steel sheet

223‧‧‧Magnetic metal

224‧‧‧ boards

23‧‧‧Rotor group

231‧‧·wheels

232‧‧‧ fan leaves

233‧‧‧Axis

3‧‧‧Lubricating grease

1 is a perspective view of a first embodiment of a bearing structure of the present invention; FIG. 2 is a plan view of a first embodiment of the bearing structure of the present invention; and FIG. 3 is a perspective view of a second embodiment of the bearing structure of the present invention; Figure 4 is a plan view showing a second embodiment of the bearing structure of the present invention; Figure 5 is a perspective view showing a third embodiment of the bearing structure of the present invention; and Figure 6 is a third embodiment of the bearing structure of the present invention. Figure 7 is a cross-sectional view showing a fourth embodiment of the bearing structure of the present invention; Figure 8 is a cross-sectional view showing a fifth embodiment of the bearing structure of the present invention; and Figure 9 is a first embodiment of the cooling fan of the present invention. FIG. 10 is a perspective view of a first embodiment of the heat dissipation fan of the present invention; FIG. 11 is a cross-sectional view of the first embodiment of the heat dissipation fan of the present invention; FIG. FIG. 13 is a perspective exploded view of a third embodiment of the heat dissipation fan of the present invention; FIG. 14 is an exploded perspective view of a fourth embodiment of the heat dissipation fan of the present invention; Figure 15 is the invention Example B-B of a first embodiment of a cross-sectional view of a hot air fan.

1‧‧‧ bearing structure

11‧‧‧Ontology

111‧‧‧Axis hole

112‧‧‧Extension

1121‧‧‧First trough area

1122‧‧‧Second trough area

Claims (5)

A bearing structure includes: a body having a shaft hole, the shaft hole being configured by axial extension of the body, and the shaft hole has at least one extension portion in the radial direction, and the extension portion is also the same axial direction of the body Extending the configuration and connecting with the shaft hole, the extending portion further has at least one first groove region and at least one second groove region, wherein the first and second groove regions are radially opposite to the axial hole The axial hole extends in a shape, the first and second groove regions are connected to the shaft hole, the shaft hole cross section is non-circular, and the first and second groove regions are two semicircles which are different from each other. 180 degrees and eccentric settings. A heat dissipating fan includes: a base having a shaft barrel, the shaft barrel having an accommodating space, the accommodating space axially penetrating the shaft barrel; a certain sub-group, sleeved outside the shaft barrel; a bearing structure The bearing structure has a body having a shaft hole, the shaft hole is axially extended, and the shaft hole has at least one extending portion in the radial direction, and the extending portion is also The same shape is coupled to the axial extension of the body, and is coupled to the shaft hole, the extension portion further has at least a first groove region and at least a second groove region, wherein the first and second groove regions are The radial direction of the hole extends toward the opposite direction of the shaft hole, and the first and second groove portions are connected to the shaft hole, and the shaft hole cross section is non-circular, and the first and second groove regions are The two semicircles are 180 degrees out of phase with each other and are eccentrically disposed; a rotor group having a hub having a plurality of blades and at least one axis, The shaft center is bored in the shaft hole. The heat dissipation fan of claim 2, wherein the stator assembly has a plurality of coils and at least one silicon steel sheet, and the coils are wound around the outer portion of the silicon steel sheet. The heat dissipation fan of claim 2, wherein the stator assembly has a plurality of coils and a magnetically permeable metal, and the coils are disposed outside the magnetic conductive metal. The heat dissipation fan of claim 2, wherein the stator set is a plurality of coils and a circuit board, and the coils are wound around the circuit board.