TWI496994B - Rotor shaft and cooling fan using same - Google Patents

Description

Axial structure and its cooling fan

The utility model relates to an axial center structure and a heat dissipating fan thereof, in particular to a shaft core structure in which a radial cross section of an axial center is non-circular, thereby increasing the pressure of lubricating grease support and a heat dissipating fan thereof.

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 heat dissipating fan has a base and a rotor set, the base has a shaft cylinder, and at least one bearing is disposed inside the shaft cylinder, the outer sleeve of the shaft cylinder is sleeved with a certain subset, the bearing has a shaft hole, and the rotor has a shaft hole The set has a hub and an axial center, the outer edge of the hub extends a plurality of blade bodies, one end of the shaft is inserted on one side of the hub, the other end is pivotally connected in the shaft hole, and the shaft and the bearing are The shaft hole is filled with lubricating grease. When the cooling fan is operated, the axis of the rotor group rotates relative to the bearing. When the shaft rotates, the supporting pressure of the lubricating grease is uneven, causing the shaft to collide. The inner wall surface of the shaft hole of the bearing generates noise and vibration, which makes the rotor group not operate smoothly, thereby reducing the life of the heat dissipation fan.

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

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

In order to achieve the above object, the present invention provides an axial structure comprising: an axial body; the axial body has an axial portion and an extension, the extension having a plurality of extensions, the extensions being connected to each other And extending radially from the core portion to form an outer edge portion, the lengths of the extending portions are not equidistant from each other.

In order to achieve the above object, the present invention provides a heat dissipating fan, comprising: a base, a certain subgroup, a bearing, and a rotor set; the base has a shaft cylinder, the shaft cylinder has an accommodation space, and the housing space The stator assembly is sleeved on the outside of the shaft cylinder; the bearing has a shaft hole, and the bearing is disposed in the accommodating space of the shaft cylinder; the rotor group has a hub and an axial structure The hub has a plurality of blades, the shaft structure is inserted on one side of the hub, the shaft center structure has an axial body, the shaft body has an axial portion and an extension, the extension has a plurality of extensions a segment, the extension segments are connected to each other, and radially extending from the axial center portion to form an outer edge portion, the extension portions are not equidistant from each other, and the outer edge portion is opposite to the axial hole of the bearing Correspondingly, the outer edge portion and the shaft hole have a lubricating grease.

Through the axial structure of the present invention and the cooling fan thereof, when the cooling fan is in operation, the cross-section of the axial structure is non-circular, so that the axial center of the axial structure and the axial hole of the bearing can be raised. The supporting force of the lubricating grease avoids the occurrence of friction loss and noise and vibration, which in turn increases the life of the axial structure 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 is a perspective view of a first embodiment of the axial structure of the present invention. As shown, the axial structure 1 includes: an axial body 11; the axial body 11 has a The axial portion 111 and an extending portion 112 have a plurality of extending portions 1121. The extending portions 1121 are connected to each other and radially extend from the axial portion 111 to form an outer edge portion 113. The extending portions 1121 The radially extending lengths are not equidistant from each other, and the radial core cross-section of the axial body 11 is non-circular.

Please refer to FIG. 2, which is a perspective view of a second embodiment of the axial structure of the present invention. As shown in the figure, the partial structure of the present invention is the same as that of the foregoing first embodiment, and therefore will not be described herein again. However, the difference between the present embodiment and the first embodiment is that the extension portion 112 has a first extension. 1122 and a second extension 1123 and a third extension 1124 and a fourth extension 1125. The first and second extensions 1122 and 1123 correspond to each other, and the third and fourth extensions 1124 and 1125 correspond to each other. The two ends of the first extension 1122 are respectively connected to the third and fourth extensions 1124 and 1125. The two ends of the second extension 1123 are respectively connected to the third and fourth extensions 1124 and 1125. The axial body 11 is radial. The cross section is elliptical.

Referring to FIG. 3, it is a perspective view of a third embodiment of the axial 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, and therefore will not be described herein again, but the embodiment is omitted. The difference from the foregoing first embodiment is that the extending portion 112 has a first extending portion 1122 and a second extending portion 1123 and a third extending portion 1124. The two ends of the first extending portion 1122 and the second portion respectively The three extension sections 1123 and 1124 are connected, and the radial core cross section 11 has a circular wedge shape.

Referring to FIG. 4, it is a perspective view of a fourth embodiment of the axial 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, and therefore will not be described herein again, but the embodiment is omitted. The difference from the first embodiment is that the shaft body 11 further has a first extending end 12, which is configured by extending from one end of the shaft body 11. The first extending end 12 has a circular cross section. .

Referring to FIG. 5, it is a perspective view of a fifth embodiment of the axial 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, and therefore will not be described herein again, but the embodiment is omitted. Different from the foregoing first embodiment is the axial body The first extending end 12 and the second extending end 13 are respectively configured by extending from opposite ends of the axial body 11. The first and second extending ends 12 and 13 have a circular cross section.

Please refer to FIG. 6 , which is a perspective view of a sixth embodiment of the axial 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, and therefore will not be described herein again, but the embodiment is omitted. The difference from the first embodiment is that the shaft body 11 further has a first extending end 12 and a second extending end 13 , and the first extending end 12 is configured by extending from one end of the axial body 11 . The first extending end 12 has a circular cross section, and the second extending end 13 is configured by the first extending end 12 extending opposite to the other end of the axial body 11 , and the second extending end 13 The cross section is the same as the cross-sectional shape of the hub body 11.

FIG. 7 is a perspective view of a first embodiment of the heat dissipation fan of the present invention. The heat dissipation fan 2 includes a base 21, a certain subset 22, and a first embodiment. The shank 21 has a housing 211. The shank 211 has an accommodating space 212. The accommodating space 212 extends axially through the shaft 211.

The stator set 22 is disposed outside the shaft barrel 211.

The bearing 24 has a shaft hole 241 , and the bearing 24 is disposed in the accommodating space 212 of the shaft barrel 211 .

The rotor assembly 23 has a hub 231 and a shaft structure 1 . The hub 231 has a plurality of blades 232 . One end of the shaft structure 1 is inserted into one side of the hub 231 , and the other end is pivotally connected to the shaft hole 241 . The structure of the axial structure 1 can be applied to the first to The axial structure 1 of the fifth embodiment is not described here. The outer edge portion 113 corresponds to the shaft hole 241 of the bearing 24, and the outer edge portion 113 and the shaft hole 241 have lubricating grease 3 therebetween. .

FIG. 10 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 foregoing first embodiment, and therefore will not be described herein again, but the embodiment and the first embodiment are omitted. 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. 11 is a perspective exploded view of a 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. 12 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, 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 circuit board 224, and the coils 221 are wound around the circuit board 224.

FIG. 13 is a cross-sectional view of the BB of the first embodiment of the present invention. As shown, the shaft body 11 is disposed in the shaft hole 241 of the bearing 24, and the shaft body 11 is The outer edge portion 113 corresponds to the inner wall surface of the shaft hole 241 of the bearing 24, and the radial cross section of the shaft core body 11 is a non-circular structure. Therefore, the supporting pressure of the lubricating grease 3 filled between the axial body 11 and the shaft hole 241 can be increased. When the cooling fan 2 is operated, the axial body 11 is suspended in the shaft hole 241 of the bearing 24. The state of the shaft body 11 does not collide with the shaft hole 241, thereby reducing noise, vibration and friction, and greatly increasing the service life of the heat dissipation fan 2.

1‧‧‧Axis structure

11‧‧‧Axis ontology

111‧‧‧Axis

112‧‧‧Extension

1121‧‧‧Extension

1122‧‧‧First extension

1123‧‧‧Second extension

1124‧‧‧ third extension

1125‧‧‧4th extension

113‧‧‧The outer edge

12‧‧‧First extension

13‧‧‧Second extension

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

24‧‧‧ bearing

241‧‧‧Axis hole

3‧‧‧Lubricating grease

1 is a perspective view of a first embodiment of the axial structure of the present invention; FIG. 2 is a perspective view of a second embodiment of the axial structure of the present invention; and FIG. 3 is a third embodiment of the axial structure of the present invention. 3 is a perspective view of a fourth embodiment of the axial structure of the present invention; FIG. 5 is a perspective view of a fifth embodiment of the axial structure of the present invention; and FIG. 6 is an axial structure of the present invention. FIG. 7 is a perspective exploded view of a first embodiment of the heat dissipation fan of the present invention; FIG. 8 is a perspective assembled view of the first embodiment of the heat dissipation fan of the present invention; 1 is a cross-sectional view of a first embodiment of a cooling fan of the present invention; FIG. 10 is a perspective exploded view of a second embodiment of the cooling fan of the present invention; and FIG. 11 is a perspective exploded view of a third embodiment of the cooling fan of the present invention. Figure 12 is a perspective exploded view of a fourth embodiment of the cooling fan of the present invention; and Figure 13 is a cross-sectional view of the first embodiment of the cooling fan of the present invention.

1‧‧‧Axis structure

11‧‧‧Axis ontology

111‧‧‧Axis

112‧‧‧Extension

1121‧‧‧Extension

113‧‧‧The outer edge

Claims (13)

An axial structure is applied to a heat dissipating fan, the two ends of which are respectively combined with a hub and a bearing, wherein the axial structure comprises: an axial center body having an axial center portion and an extension portion, The extension has a plurality of extensions extending radially from the axial portion and interconnected to form an outer edge portion, wherein the extensions are not equidistant from each other in a radial extent, and the axis is The radial cross section of the body is non-circular, and one end of the axial structure is connected to the hub, and the other end is pivotally connected to one of the shaft holes of the bearing. The axial structure of claim 1, wherein the extension has a first extension and a second extension, and a third extension and a fourth extension, the first and second extensions The third and fourth extensions are respectively connected to each other, and the two ends of the first extension are respectively connected to the third and fourth extensions, and the two ends of the second extension are respectively connected to the third and fourth extensions. The body has a radial cross section that is elliptical. The axial structure of claim 1, wherein the extending portion has a first extending portion and a second extending portion and a third extending portion, and the two ends of the first extending portion and the second portion respectively The three extension segments are connected, and the radial cross section of the body is a circular wedge shape. The axial structure of claim 1, wherein the body further has a first extending end configured by extending from one end of the body, the first extending end having a circular cross section. The axial structure as described in claim 1, wherein the body has a body A first extending end and a second extending end are respectively configured by extending from opposite ends of the axial body, and the first and second extending ends are circular in cross section. The axial structure of claim 1, wherein the axial body further has a first extending end and a second extending end, the first extending end being configured by extending from one end of the axial body The first extended end has a circular cross section, and the second extended end is configured by the first extended end extending opposite to the other end of the axial body, and the cross section of the second extended end is The axial body has the same cross-sectional shape. A cooling 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 disposed outside the shaft barrel; and a bearing having a shaft hole, the bearing is disposed in the accommodating space of the shaft cylinder; a rotor group has a hub and a shaft center structure, the hub has a plurality of blades, and one end of the shaft core structure is inserted on one side of the hub, The other end is pivotally connected to the shaft hole, the axial center structure has an axial center body having an axial center portion and an extending portion, the extending portion has a plurality of extending portions, and the extending portions are radially extended from the axial center portion and mutually The connecting portion forms an outer edge portion, the extending portions are not equidistant from each other, and the outer edge portion corresponds to the shaft hole of the bearing, and the outer edge portion and the shaft hole have a lubricating grease. The heat dissipation fan of claim 7, wherein the extension portion has a first extension portion and a second extension portion, and a third extension portion and a fourth extension The first and second extensions correspond to each other, and the third and fourth extensions correspond to each other, and the two ends of the first extension are respectively connected to the third and fourth extensions, and the two ends of the second extension respectively The third and fourth extension sections are connected, and the radial center cross section of the shaft body is elliptical. The heat dissipation fan of claim 7, wherein the extension portion has a first extension portion and a second extension portion and a third extension portion, and the two ends of the first extension portion are respectively associated with the second The three extension segments are connected, and the radial body cross section of the axial body is a circular wedge shape. The heat dissipation fan of claim 7, wherein the axial body has a non-circular radial cross section. The heat dissipation fan of claim 7, wherein the stator assembly further has a plurality of coils and at least one silicon steel sheet, and the coils are disposed outside the silicon steel sheet. The heat dissipation fan of claim 7, wherein the stator assembly further has a plurality of coils and a magnetic conductive metal, and the coils are disposed outside the magnetic conductive metal. The heat dissipation fan of claim 7, wherein the stator assembly is a plurality of coils and a circuit board, and the coils are wound around the circuit board.