TWM551658U - Heat dissipating fan structure with cylindrical fan blades - Google Patents

Description

Cooling fan structure of cylindrical fan blade

This creation is about the fan field, especially the cooling fan structure of a cylindrical fan blade.

Generally, the fan blades of the fan have a difference in speed caused by the airflow passing through the designed airflow angle so that the airflow flows on the lower surface of the airfoil due to the difference in surface distance length. Because the airflow on the upper wing surface is faster, the corresponding gas pressure is smaller, and the airflow velocity is slower on the lower wing surface, so the corresponding surrounding gas pressure is larger, and the pressure difference of different sizes makes the lower airfoil The pressure pushes the pressure on the upper airfoil and thus generates lift. The reaction force of the lift forms the airflow thrust, and the airflow turns through the airfoil to produce a work effect, thereby exhibiting fan characteristics.

However, the traditional dynamic and static leaf structure, or the single-moving blade with the rib structure outer frame, due to the interaction of the blade-wing structure, the noise and narrow-band noise on the noise are generally large. Furthermore, the conventional fan structure causes the airflow to flow out in a divergent manner due to the influence of the blade wing shape, so that the heat-dissipating element directly behind the fan in the system is insufficient in heat dissipation.

Therefore, how to solve the above problems and deficiencies, that is, the creators of the case and the relevant manufacturers engaged in this industry are eager to study the direction of improvement.

The purpose of the present invention is to provide a conductive portion capable of supplying power to a second stator group of each rotating cylinder provided on an outer surface of the rotating body when the rotating body of the cooling fan rotates to drive the rotating cylinder to self-rotate.

Another object of the present invention is to provide a plurality of cylindrical blades on the axial surface of the hub, which in addition to rotating with the hub, also self-rotating to make the air flow toward the radial direction of the hub Radiation flows.

Another object of the present invention is to provide a plurality of cylindrical fan blades on a radial surface of the hub, which in addition to rotating with the hub, also self-rotating to direct airflow toward the axial direction of the hub flow.

Another object of the present invention is to provide a cooling fan structure of a cylindrical fan blade. The airflow derived through the rotating cylinder does not undergo a conventional airfoil blade change interaction, and the noise level is relatively small under the same antiheating. .

Another object of the present invention is to provide a cooling fan structure of a cylindrical fan blade. The airflow derived through the rotating cylinder is convergent and wide-ranging, so that the heating element in the system can be directly guided by the airflow to the heat source or Directly bypass the heat source.

Another object of the present invention is to provide a cooling fan structure for a cylindrical fan blade, which applies the Magnus effect to a cooling fan to generate a corresponding airflow.

Another purpose of the present invention is to provide each rotating cylindrical system to rotate at different rotational speeds, thereby generating different magnitudes of thrust so that the directional thrust of the rotating cylinders is off-side, and then applied to the heat source not directly behind the cooling fan. Antipyretic.

Another purpose of the present invention is to provide that the radius of each of the rotating cylinders is different, and the thrust of different magnitudes is generated so that the directional thrust of the rotating cylinders is offset to one side, and the heat source is not directly behind the cooling fan. Antipyretic.

In order to achieve the above object, the present invention provides a cooling fan structure for a cylindrical fan blade, comprising: a rotating body including a first rotor group corresponding to a first stator group to drive the first rotor of the rotating body The group is rotated, the plurality of first conductive portions are disposed in the first rotor group, a second conductive portion is disposed in the first stator group, and correspondingly contacts the first conductive portion; the plurality of rotating cylinders are disposed in the first An outer surface of a rotor group rotates with the rotating body, and each of the rotating cylinders includes a second rotor group and a second stator group, the second rotor group corresponding to the second stator group to drive the The rotating cylinder rotates by itself, and the second stator set is electrically connected to the first conductive portions.

In one embodiment, the first rotor assembly includes a hub having an outer surface and a first inner space and a second inner space are disposed outside the first inner space, the first inner space is provided with a hub shaft connection The first hub and the first magnetic component are disposed on the inner side of the first housing portion, and the first inner conductive portion is disposed on the second inner space.

In an embodiment, an annular partition wall is disposed between the first inner space and the second inner space.

In one embodiment, the first conductive portions respectively include a first cantilever rod and a second cantilever rod. One end of the first cantilever rod is connected to the hub, and the other end is provided with a first support shaft, a first The roller is movably sleeved to the first support shaft; one end of the second cantilever bar is connected to the hub, and the other end is provided with a second support shaft, and a second roller is movably sleeved with the second support shaft and opposite to the first roller .

In one embodiment, the first cantilever bar and the second cantilever bar are respectively connected to a first guiding wire and a second guiding wire, and the first guiding wire and the second guiding wire extend through the hub To the outside of the hub.

In one embodiment, the first stator assembly includes a first base provided with a central shaft barrel, and the central shaft barrel is provided with at least one bearing for supporting the hub axle, and a first stator winding assembly An outer side of the center bobbin is disposed to correspond to the first magnetic element, and the second conductive portion is disposed on the first base and outside the stator winding set.

In one embodiment, the second conductive portion includes a first protruding ring body and a second protruding ring system disposed concentrically, and the first protruding ring body is connected to a positive electrode and a negative electrode of an external power source. one of them, The second protruding ring body is connected to the other one of the positive electrode and the negative electrode, wherein the second protruding ring body is located outside the first protruding ring body, and the first protruding ring body and the second protruding ring The bodies respectively have a fixed end connected to the base and a free end contacting the first conductive part.

In one embodiment, the outer surface of the hub has an axial surface and a radial surface on which the rotating cylinder is disposed.

In an embodiment, the rotating cylinders are arranged in a symmetrical or asymmetrical arrangement.

In one embodiment, the second rotor assembly includes a cylindrical body having a cylindrical content chamber at one end, the cylindrical content chamber is provided with a cylindrical shaft connecting the cylindrical body and accommodating a second shell portion and a second annular magnetic member. The second annular magnetic element is disposed on an inner side of the second shell portion.

In one embodiment, the second stator set includes a second base corresponding to a side of the second rotor set, and a central shaft barrel is disposed. The central shaft barrel is provided with at least one bearing for supporting the cylindrical shaft. The second stator winding set is sleeved on an outer side of the central barrel corresponding to the second annular magnetic element.

In one embodiment, the second base is opposite to one side of the second rotor set with a fixing portion connecting an outer surface of the first rotor group.

In an embodiment, an outer peripheral surface of the cylindrical body is provided with at least one ridge.

In one embodiment, the ribs are helical or wing-shaped or water-like or segmented radially distributed.

In one embodiment, the radius of the rotating cylinders is the same or different.

In one embodiment, the rotational speeds of the rotating cylinders are the same or different.

10‧‧‧ cooling fan

20‧‧‧ rotating body

21‧‧‧First rotor group

210‧‧·wheels

211‧‧‧ outer surface

2111‧‧‧Axial surface

2112‧‧‧ Radial surface

212‧‧‧First inner space

213‧‧‧Second inner space

214‧‧‧Wheel axle

216‧‧‧First magnetic component

215‧‧‧First stator winding set

2151‧‧‧矽Steel sheet group

2152‧‧‧Insulation frame set

2153‧‧‧ Winding group

2154‧‧‧First board

217‧‧‧ annular partition

218‧‧‧ first shell

22‧‧‧First stator set

221‧‧‧ First base

222‧‧‧ center shaft tube

223‧‧‧ bearing

24‧‧‧First Conductive Department

241a‧‧‧First cantilever

242a‧‧‧First support shaft

243a‧‧‧First wheel

244a‧‧‧First guide line

241b‧‧‧second cantilever

242b‧‧‧second support shaft

243b‧‧‧Second wheel

244b‧‧‧second guide line

25‧‧‧Second Conductive Department

251‧‧‧First protruding ring

2511‧‧‧Fixed end

2512‧‧‧Free end

252‧‧‧Second protruding ring

2521‧‧‧ fixed end

2522‧‧‧Free end

253‧‧‧positive lead

254‧‧‧Negative lead

30, 30a, 30b, 30c‧‧‧ rotating cylinder

31‧‧‧Second rotor set

311‧‧‧Cylinder body

3111, 3111a, 3111b, 3111c‧‧ ‧ ribs

312‧‧‧Cylinder room

313‧‧‧Cylindrical shaft

314‧‧‧ Second Shell

315‧‧‧Second magnetic component

32‧‧‧Second stator set

321‧‧‧Second base

322‧‧‧Center shaft tube

323‧‧‧ bearing

325‧‧‧Second stator winding set

3251‧‧‧矽Steel sheet group

3252‧‧‧Insulation frame set

3253‧‧‧ Winding group

3254‧‧‧Second circuit board

326‧‧‧ fixed department

3261‧‧‧ buckle

α, β, γ‧‧‧ angle

C21, c22, c23‧‧‧ axial line

C1, c2‧‧‧ center line

L11~L13, L21~L23‧‧‧ straight line distance

The following figures are intended to make the present invention easier to understand, and the drawings are described in detail herein and form part of the specific embodiments. Through the specific embodiments herein and with reference to the corresponding drawings, the specific embodiments of the present invention are explained in detail, and the function principle of the creation is explained.

1A is a schematic exploded perspective view of the creation; FIG. 1B is a perspective exploded view of another perspective of the creation; FIG. 1C is a schematic cross-sectional view of the creative combination; FIG. 2A is a perspective exploded view of the creation rotary cylinder; 2B is a schematic cross-sectional view of the created rotating cylinder; FIG. 3A is a schematic view of the creation of the creation; FIG. 3B is a schematic diagram of the self-rotation of the rotating cylinder; FIG. 4A is a perspective view of another embodiment of the creation Actuation diagram; Figure 4B is a schematic diagram of the front view of another implementation of the creation; Figures 5A and 5B are schematic diagrams of other alternative implementations of the creation; Figures 6A, 6B, and 6C are schematic diagrams of various implementations of the creation of the rotating cylinder; The figure is a schematic view showing the symmetric arrangement of the rotating cylinders on the axial surface of the hub; FIG. 7B is a schematic view showing the asymmetric arrangement of the rotating cylinders on the axial surface of the hub; FIG. 8A is a schematic view Creating a schematic diagram of the symmetrical arrangement of the rotating cylinders on the radial surface of the hub; FIG. 8B is an asymmetrical arrangement of the rotating cylinders on the radial surface of the hub FIG.

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.

FIG. 1A is a schematic exploded perspective view of the creation; FIG. 1B is a perspective exploded view of another perspective of the creation; FIG. 1C is a schematic cross-sectional view of the creative combination. As shown, a cooling fan 10 includes a rotating body 20 and a plurality of rotating cylinders 30.

The rotating body 20 includes a first rotor set 21 and a first stator set 22. The first rotor assembly 21 corresponds to the first stator assembly 22, wherein the first rotor assembly 21 includes a hub 210 having an outer surface 211 and a first inner space 212 and a second inner space 213. The outer surface 211 has an axial surface 2111 and a radial surface 2112 extending from the outer periphery of the axial surface 2111. The radial surface 2112 is perpendicular to the axial surface 2111. The axial surface 2111 is the hub 210. The top surface, the radial surface 2112 is the side of the hub 210.

The first inner space 212 and the second inner space 213 are arranged in a concentric circle, and the second inner space 213 is disposed outside the first inner space 212. An annular partition wall 217 is disposed between the first inner space 212 and the second inner space 213. The first inner space 212 is provided with a hub axle 214 connected to the hub 21 and houses a first shell portion 218 (such as an iron shell) and a first magnetic element 216 (such as a magnet). The first magnetic element 216 is ring-shaped. On the inner side of the first shell portion 218. The second inner space 213 is provided with a plurality of first conductive portions 24 to cooperate with the plurality of rotating cylinders 30.

The first stator assembly 22 includes a first base 221 and a central shaft barrel 222. The central shaft barrel 222 is provided with at least one bearing 223 for supporting the hub axle 214. The hub shaft 214 is inserted. The bearing 223 disposed in the center barrel 222 is then buckled by a clasp to position the first rotor set 21 on the first stator set 22. A first stator winding group 215 is sleeved on an outer side of the central shaft barrel 222 corresponding to the first inner space 212, and the first stator winding group 215 is energized and followed by the first The magnetic element 216 generates a magnetic induction effect, thereby driving the first rotor group 21 of the rotating body 20 to rotate. The first stator winding group 215 includes a stack of a steel sheet group 2151 and an insulating frame group 2152 which are respectively disposed on the steel sheet. The upper and lower winding groups 2153 of the chip group 2151 are wound around the insulating frame group 2152, and a first circuit board 2154 is disposed under the insulating frame group 2152 to electrically connect the winding wire group 2153. The first circuit board 2154 is connected. An external power source (not shown) is coupled to provide power to the first stator winding set 215. A second conductive portion 25 is disposed on the first base 221 and located outside the stator winding group 215 and axially or vertically correspondingly contacts the plurality of first inner spaces 213 of the first rotor group 21 Conductive portion 24. The first conductive portion 24 and the second conductive portion 25 are made of a conductive material such as metal. The hub 210 and the first base 221 are made of an insulating material such as plastic.

The first conductive portion 24 includes a first cantilever rod 241a and a second cantilever rod 241b. One end of the first cantilever rod 241a is connected to an inner side of the hub 210, and the other end is provided with a first support shaft 242a. The first roller 243a is movably sleeved to the first support shaft 242a; one end of the second cantilever rod 241b is connected to an inner side of the hub 210, and the other end is provided with a second support shaft 242b, and a second roller 243b is movably sleeved. The second support shaft 242b is opposite to the first roller 243a. The first cantilever rod 241a and the second cantilever rod 241b are respectively connected to a first guiding line 244a and a second guiding line 244b. Furthermore, the top portion 2111 of the hub 210 is provided with two through holes 21111 and 21112 extending through the hub 210. The first guiding wire 244a and the second guiding wire 244b extend through the through holes 21111 and 21112 to the outside of the hub 210. The rotating cylinder 30 is connected.

The second conductive portion 25 includes a first protruding ring body 251 and a second protruding ring body 252 arranged concentrically and connected to an external power source via a positive lead 253 and a negative lead 254 (not shown). The positive power supply and the negative power supply are not limited thereto, and vice versa. The second protruding ring body 252 is located outside the first protruding ring body 251, and the first protruding ring body 251 and the second protruding ring body 252 respectively have a fixed end 2511, 2521 connected to the first The base 221 and a free end 2512, 2522 protrude upward and respectively contact the first roller 243a and the second roller 243b of the first conductive portion 24.

In detail, when the hub 210 rotates, the first conductive portion 24 is rotated, and the first roller 243a and the second roller 243b may be at the free ends of the first protruding ring body 251 and the second protruding ring body 252. 2512, 2522 scrolling. The positive power source is transmitted to the first roller 243a through the first protruding ring body 251 and then transmitted to the rotating cylinder 30 via the first guiding wire 242a and the first cantilever beam 241a via the first guiding wire 244a. The negative power source is transmitted to the second roller 243b through the second protruding ring body 252 and then transmitted to the rotating cylinder 30 via the second guiding wire 242b and the second cantilever beam 241b via the second guiding wire 244b.

The rotating cylinders 30 are disposed on the outer surface 211 of the first rotor assembly 21. In the preferred embodiment, the rotating cylinders 30 are vertically disposed on the axial surface 2111 of the hub 210, a center of the rotating cylinder 30. Line c2 is parallel to a centerline c1 of the hub 210. The rotating cylinders 30 are rotated by the first rotor group 21 of the rotating body 20 around the center line c1 of the hub 210.

The second part of Fig. 2A is a three-dimensional exploded view of the creation of the rotating cylinder; the second drawing is a schematic sectional view of the creation of the rotating cylinder. As shown in Figures 2A and 2B, each of the rotating cylinders 30 includes a second rotor set 31 and a second stator set 32, the second rotor set 31 corresponding to the second stator set 32 to drive the rotating cylinders 30 themselves. Rotate.

The second rotor assembly 31 includes a cylindrical body 311 having a cylindrical content chamber 312 at one end, and a cylindrical shaft 313 is disposed in the cylindrical content chamber 312 to connect the cylindrical body 311 and accommodate a second shell portion 314 and a second portion. A magnetic element 315 is disposed on an inner side of the second casing 314. An outer peripheral surface of the cylindrical body 311 is provided with at least one rib 3111. In the present embodiment, the rib 3111 is spirally wound and spirally wound around the outer peripheral surface of the cylindrical body 3111.

The second stator assembly 32 includes a second base 321 protruding from a central shaft cylinder 322. The central shaft cylinder 322 is provided with at least one bearing 323 for supporting the cylindrical shaft 313. The cylindrical shaft 313 is inserted into the bearing 323 of the central shaft barrel 322 and then buckled by a buckle to set the second rotor group 31 on the second stator assembly 32. A second stator winding set 325 is sleeved on an outer side of the central shaft barrel 322 corresponding to the second magnetic element 315 of the cylindrical content chamber 312. When the second stator winding set 325 is energized, the second magnetic element is followed by 315 generates a magnetic induction effect, thereby driving the second rotor set 31 of the rotating cylinder 30 to rotate.

The second stator winding group 325 includes a stacked steel sheet group 3251 and an insulating frame group 3252 which are disposed on the upper and lower sides of the silicon steel sheet group 3251 and a winding group 3253 wound around the insulating frame group 3252 and a second. The circuit board 3254 is disposed to electrically connect the winding group 3253 below the insulating frame group 3252.

As shown in FIG. 1C, the first guiding wire 244a and the second guiding wire 244b are connected to the second circuit board 3254 of the second stator winding group 325 of the rotating cylinder 30, thereby further supplying the positive power source and The negative supply is conducted to the second circuit board 3254 to provide power to the second stator winding assembly 325.

Furthermore, as shown in FIG. 2A and FIG. 2B, the second base 321 is provided with a fixing portion 326 which is connected to a predetermined position of the axial surface 2111 of the hub 210 of the first rotor group 21, and the end of the fixing portion 326 has a The buckle 3261 snaps the hub 210. In some alternative implementations, the securing portion 326 can be secured to the hub 210 by riveting or adhesive or locking.

Referring to FIGS. 3A and 3B, when the hub 210 of the first rotor set 21 rotates, the rotating cylinders 30 are rotated about the center line c1 of the hub 210. And the second stator group 32 and the second rotor group 31 of each rotating cylinder 30 act to drive the cylindrical body 311 of the second rotor group 31 to rotate around the center line c2, so that one side of the rotating cylinder 30 has a lateral airflow. Flow to the rotating cylinder 30 (as shown in Figure 3B, flowing from the right side to the left side of the figure) to produce a Magnus type effect Should, that is, the sum of the speeds above A of the rotating cylinder 30 is the additive effect (the lateral velocity F1 and the tangential velocity F2 are in the same direction), the velocity becomes faster, and the pressure is smaller (according to Bernoulli's principle), The sum of the speeds of the lower B of the rotating cylinder 30 is the subtractive effect (the transverse speed F1 and the tangential speed F2 are opposite), the speed is slower, the pressure is larger (according to Bernoulli's principle); the last two pressure differences Pushing the pressure with a small pressure will produce a lateral thrust Y perpendicular to the cross flow direction. Under such action, the heat radiating fan 10 generates a centrifugal airflow, that is, the airflow radially flows toward the radial direction of the heat radiating fan 10.

As shown in the fourth embodiment of FIGS. 4A and 4B, in another alternative embodiment, the rotating cylinders 30 are radially disposed on the radial surface 2112 of the hub 210 of the rotating body 20. When the hub 210 of the rotating body 20 rotates and the rotating cylinder 30 rotates by itself, the sum of the speeds above the rotating cylinder 30 is the subtractive effect (the lateral speed F1 and the tangential speed F2 are opposite), and the speed is slower. Large (according to Bernoulli's principle), the sum of the speeds below the rotating cylinder 30 is the additive effect (the lateral velocity F1 and the tangential velocity F2 are in the same direction), the velocity becomes faster, and the pressure is smaller (according to Bernoulli) Bernoulli's principle; the last two pressure differences, the pressure to the small pressure to push forward, will produce a lateral thrust Y perpendicular to the cross-flow direction. The cooling fan 10 is caused to generate an axial airflow, that is, the airflow flows toward the axial direction of the cooling fan 10.

In an alternative implementation, the rotating cylinders 30 are rotated at the same rotational speed. In another alternative implementation, each of the rotating cylinders 30 is rotated at different rotational speeds to generate different magnitudes of thrust, and the rotational speed can be adjusted such that the combined thrust of the rotating cylinders 30 is off-side, and thus the heat source is not used in the cooling fan. 10 back to the heat.

5A and 5B, the radius of the rotating cylinders 30 in the previously described embodiment is the same size representation, but in some alternative implementations, the hub 210 of the rotating body 20 is disposed. The radius of each of the rotating cylinders 30 of the axial surface 211 (as in Figure 5A) or the radial surface 2112 (as in Figure 5B) is of a different size, for example three rotating cylinders 30a, 30b, 30c in the illustration, rotation The radius of the cylinder 30a is larger than the radius of the rotating cylinder 30b is larger than the radius of the rotating cylinder 30c, whereby the rotating cylinders 30a, 30b, 30c generate different output air volumes, thereby generating different magnitudes of thrust, and the output air volume can be adjusted. The size is such that the directional thrust of the rotating cylinders 30 is shifted to one side, and the heat source is not used for the heat dissipation immediately behind the heat radiating fan 10.

Continuing with reference to Figures 6A and 6B and 6C, the foregoing embodiment shows that the ribs 3111 of the outer peripheral surface of the cylindrical body 311 (as shown in the previous figures) are spiral, but in other alternative implementations, the protrusions The strips 3111a are wing-shaped (as in Figure 6A) or the ribs 3111b are waterwheel-like (as in Figure 6B) or the ribs 3111c are segmented and radially distributed (as in Figure 6C).

Referring to FIGS. 7A and 7B, the rotating cylinders 30a, 30b, and 30c vertically disposed on the axial surface 211 of the hub 210 are symmetrically arranged as shown in FIG. 7A. The symmetric arrangement is such that the linear distance between the two rotating cylinders 30a, 30b, 30c is equal. As shown in FIG. 7A, the linear distance L11 between the rotating cylinder 30a and the rotating cylinder 30c, the rotating cylinder 30b and The linear distance L12 between the rotating cylinders 30c and the linear distance L13 between the rotating cylinder 30a and the rotating cylinder 30b are equal to each other by the straight line distances L11 to L13.

In another implementation, the rotating cylinders 30a, 30b, 30c disposed vertically on the axial surface 211 of the hub 210 are arranged in an asymmetrical arrangement, as shown in Figure 7B. The asymmetric arrangement is such that the linear distances between the two rotating cylinders 30a, 30b, and 30c are not equal. As shown in FIG. 7B, the three straight line distances L21 to L23 are not equal.

Referring to FIGS. 8A and 8B, the rotating cylinders 30a, 30b, and 30c radially disposed on the radial surface 2112 of the hub 210 of the rotating body 20 are symmetrically arranged, as shown in FIG. 8A. Shown. The symmetric arrangement is such that the angles α, β, and γ of the two rotating cylinders 30a, 30b, and 30c are the same. And as shown in FIG. 8A, the axial lines c21, c22, c23 of the respective rotating cylinders 30a, 30b, 30c extend to the center line c1 of the hub 210, and the angle γ between the rotating cylinder 30a and the rotating cylinder 30b is defined. Between the axial lines c21, c22; the angle α between the rotating cylinder 30b and the rotating cylinder 30c is defined between the axial lines c22, c23; the angle β between the rotating cylinder 30c and the rotating cylinder 30a is defined Between the axial lines c21, c23.

In another implementation, the rotating cylinders 30a, 30b, 30c radially disposed on the radial surface 2112 of the hub 210 of the rotating body 20 are arranged in an asymmetrical arrangement, as shown in FIG. 8B. The asymmetric arrangement is such that the angles α, β, and γ of the two rotating cylinders 30a, 30b, and 30c are different. In summary, this creation has the following advantages;

1. The first conductive portion 24 and the second conductive portion 25 can supply power to the second stator group of each of the rotating cylinders 30 provided on the outer surface of the rotating body 20 when the rotating body 20 of the heat radiating fan 10 rotates. 32 to drive the rotating cylinder 30 to self-rotate, to avoid interference of the power supply line.

2. The rotating cylinders 30 are disposed on the axial surface 2111 of the hub 210 to generate a radial radial flow, and the radial side 2112 of the hub 210 provides axial flow.

3. The airflow exited via the rotating cylinder 30, because of the interaction of the conventional wing-shaped blade changes, the noise level is relatively small under the same anti-heating.

4. The airflow derived through the rotating cylinder 30 is more convergent and has a wider range. Therefore, the heating element in the system can be directly guided by the airflow to the heat source or directly circulate and take away the heat source.

The present invention has been described in detail above, but the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited. That is, all changes and modifications made in accordance with the scope of this creation application shall remain covered by the patents of this creation.

10‧‧‧ cooling fan

20‧‧‧ rotating body

21‧‧‧First rotor group

210‧‧·wheels

211‧‧‧ outer surface

2111‧‧‧Axial surface

2112‧‧‧ Radial surface

215‧‧‧First stator winding set

2151‧‧‧矽Steel sheet group

2152‧‧‧Insulation frame set

2153‧‧‧ Winding group

2154‧‧‧First board

22‧‧‧First stator set

221‧‧‧ First base

222‧‧‧ center shaft tube

223‧‧‧ bearing

25‧‧‧Second Conductive Department

251‧‧‧First protruding ring

2512‧‧‧Free end

252‧‧‧Second protruding ring

2522‧‧‧Free end

253‧‧‧positive lead

254‧‧‧Negative lead

30‧‧‧Rotating cylinder

Claims (16)

A cooling fan structure for a cylindrical fan blade, comprising: a rotating body, comprising: a first rotor group corresponding to a first stator group to drive the first rotor group of the rotating body to rotate, the plurality of first conductive portions being disposed at the first a second conductive portion disposed in the first stator group and correspondingly contacting the first conductive portions; and a plurality of rotating cylinders disposed on an outer surface of the first rotor group The rotating body rotates, and each of the rotating cylinders respectively includes a second rotor set and a second stator set, the second rotor set corresponding to the second stator set to drive the rotating cylinders to self-rotate, the second stator The group is electrically connected to the first conductive portion. The cooling fan structure of the cylindrical fan blade according to claim 1, wherein the first rotor group includes a hub having an outer surface and a first inner space and a second inner space are disposed outside the first inner space. The first inner space is provided with a hub axle connecting the hub and accommodating a first shell portion and a first magnetic component, the first magnetic component being disposed on an inner side of the first shell portion, the second inner space The first conductive portions are provided. The cooling fan structure of the cylindrical fan blade according to claim 2, wherein an annular partition wall is disposed between the first inner space and the second inner space. The cooling fan structure of the cylindrical fan blade according to claim 1, wherein the first conductive portions respectively comprise an opposite first cantilever rod and a second cantilever rod, and one end of the first cantilever rod is connected to the hub. The other end is provided with a first support shaft, a first roller is movably sleeved with the first support shaft; one end of the second cantilever rod is connected to the hub, and the other end is provided with a second support shaft and a second roller movable sleeve. The second support shaft is coupled to the first roller. The cooling fan structure of the cylindrical fan blade according to claim 4, wherein the first cantilever bar and the second cantilever bar are respectively connected to a first guiding line and a second guiding line, the first guiding line And the second guiding wire extends through the hub and extends to the outside of the hub. The cooling fan structure of the cylindrical fan blade according to claim 2, wherein the first stator assembly comprises a first base provided with a central shaft cylinder, and the central shaft cylinder is provided with at least one bearing for supporting the hub a shaft, a first stator winding group sleeved on an outer side of the central shaft barrel corresponding to the first magnetic element, the second conductive portion being disposed on the first base and outside the stator winding group . The cooling fan structure of the cylindrical fan blade according to claim 6, wherein the second conductive portion comprises a first protruding ring body and a second protruding ring system is arranged concentrically, and the first protruding portion The ring body is connected to one of a positive electrode and a negative electrode of an external power source, the second protruding ring body is connected to the other of the positive electrode and the negative electrode, wherein the second protruding ring body is located outside the first protruding ring body And the first protruding ring body and the second protruding ring body respectively have a fixed end connecting the first base and a free end contacting the first conductive part. The cooling fan structure of a cylindrical fan blade according to claim 2, wherein an outer surface of the hub has an axial surface and a radial surface, and the rotating cylinder is disposed on the axial surface or the radial surface. A cooling fan structure for a cylindrical fan blade according to claim 8, wherein the rotating cylinders are arranged symmetrically or asymmetrically. The cooling fan structure of the cylindrical fan blade according to claim 1, wherein the second rotor group comprises a cylindrical body having a cylindrical content chamber at one end, and the cylindrical content chamber is provided with a cylindrical shaft connecting the cylindrical body and accommodating a second shell portion and a second magnetic element disposed on an inner side of the second shell portion. The cooling fan structure of the cylindrical fan blade of claim 10, wherein the second stator assembly comprises a second base provided with a central shaft cylinder, wherein the central shaft cylinder is provided with at least one bearing for supporting the cylindrical shaft A rod, a second stator winding set is sleeved on an outer side of the central barrel to correspond to the second magnetic element. The cooling fan structure of a cylindrical fan blade according to claim 11, wherein the second base is provided with a fixing portion connecting an outer surface of the first rotor group. The heat dissipation fan structure of a cylindrical fan blade according to claim 10, wherein an outer peripheral surface of the cylindrical body is provided with at least one ridge. A cooling fan structure for a cylindrical fan blade according to claim 13, wherein the ribs comprise a spiral or a wing or a waterwheel or a segmented radial distribution. The cooling fan structure of the cylindrical fan blade according to claim 1, wherein the radius of the rotating cylinders is the same or different. The cooling fan structure of the cylindrical fan blade according to claim 1, wherein the rotational speeds of the rotating cylinders are the same or different.