CN218177513U - Heat radiation fan - Google Patents

Abstract

The application relates to a cooling fan, which comprises a fan frame, a stator and a fan wheel, wherein the fan frame comprises a base, the base is provided with a hollow shaft column, the stator comprises a damping inner cylinder and more than two silicon steel ring sheets, the damping inner cylinder is sleeved with the hollow shaft column, the silicon steel ring sheets are stacked and respectively sleeved with the damping inner cylinder, the inner edge of each silicon steel ring sheet is respectively clamped with the outer wall of the damping inner cylinder, the fan wheel comprises a hub and more than two fan blades radially extending from the hub, the hub is provided with a rotating shaft, and the fan wheel is pivoted in the hollow shaft column by the rotating shaft and covers the hub with the stator; therefore, the vibration generated by the fan wheel during rotation can be effectively absorbed through the damping inner cylinder of the stator, so that the noise generated by the vibration transmitted to the fan frame is avoided.

Description

Heat radiation fan

Technical Field

The present application relates to a fan, and more particularly, to a heat dissipation fan with vibration reduction.

Background

Electronic devices and electronic components (such as motherboard, integrated circuit, PCB, etc.) inside the device can generate heat energy and gradually increase temperature during operation, and when the heat dissipation efficiency is insufficient, the electronic components will be damaged or short-circuited, which affects the performance and lifetime of the electronic components during operation. Therefore, a heat dissipation fan is often disposed inside the electronic device and apparatus to efficiently dissipate heat.

A conventional heat dissipation fan generally includes a fan frame and a fan wheel rotatably disposed in the fan frame, so as to take away heat energy inside the electronic device and the apparatus through an air volume generated by the rotation of the fan wheel. However, when the fan wheel is in operation, due to the air resistance and the reaction force of the airflow, the parts assembled with each other will generate vibration due to the interaction of the mutual acting forces, and the vibration is easily transmitted to the casing of the electronic device and apparatus through the parts, thereby causing the parts to collide with each other and causing wear and noise.

In view of the above, the applicant has made an intensive study to solve the above problems in cooperation with the application of the theory aiming at the above deficiencies of the prior art, and the objective of the applicant is to improve the present invention.

SUMMERY OF THE UTILITY MODEL

The main objective of the present application is to enable the inner damping cylinder of the stator to effectively absorb the vibration generated by the fan wheel during rotation, so as to prevent the vibration from being transmitted to the fan frame to generate noise.

In order to achieve the above object, the present application provides a heat dissipation fan, including a fan frame, a stator and a fan wheel, the fan frame includes a base, the base is provided with a hollow shaft post, the stator includes a damping inner tube and two or more silicon steel ring pieces, the damping inner tube is sleeved with the hollow shaft post, the two or more silicon steel ring pieces are stacked, each silicon steel ring piece is sleeved with the damping inner tube, the inner edge of each silicon steel ring piece is clamped with the outer wall of the damping inner tube, the fan wheel includes a hub and two or more fan blades radially extending from the hub, the hub is provided with a rotating shaft, and the fan wheel is pivoted in the hollow shaft post by the rotating shaft and covers the hub with the stator.

In an embodiment of the present application, each silicon steel ring piece includes an inner ring and two or more bobbins, each bobbin extends outward from the inner ring, the bobbins of each silicon steel ring piece are stacked corresponding to each other, the outer wall of the damping inner cylinder is provided with an annular groove for the silicon steel ring pieces to be clamped, the damping inner cylinder is provided with two or more positioning protrusions in the annular groove, the inner edge of each inner ring is provided with two or more positioning notches, and each positioning protrusion is clamped in the corresponding positioning notch.

In one embodiment of the present application, each silicon steel ring plate includes an inner ring and two or more bobbins, each of the bobbins extends outward from the inner ring, and the bobbins of each of the silicon steel ring plates are stacked in correspondence with each other, the stator further includes an insulating support and two or more coils, each of the silicon steel ring plates is disposed in the insulating support, and each of the coils is wound around the insulating support and an outer side of each of the bobbins, respectively.

In an embodiment of the present application, a limit step is formed on an outer edge of the hollow shaft, and the damping inner cylinder is sleeved on the hollow shaft and abuts against the limit step.

In one embodiment of the present application, the fan frame further includes a frame body and two or more supports, each of the supports bridging between the base and the frame body.

In an embodiment of the present application, the shaft includes a hollow shaft, a fixing block protruding from an inner edge of the hollow shaft, a bearing tightly fitted in the hollow shaft and engaged with the fixing block, a rotating shaft rotatably pivoted to the bearing, a shaft seat disposed in the hub, an end of the rotating shaft embedded in the shaft seat, and a spring sleeved on the rotating shaft and elastically clamped between the shaft seat and the bearing.

The cooling fan can effectively absorb the vibration generated by the fan wheel during rotation through the arrangement of the damping inner cylinder, so that the vibration is prevented from being transmitted to the fan frame to generate noise, and the vibration can be further absorbed by matching more than two supports of the fan frame to reduce the noise.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and the following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

Fig. 1 is an exploded perspective view of a stator of the present application.

Fig. 2 is a perspective view of a stator according to the present application.

Fig. 3 is a sectional view of a stator of the present application.

Fig. 4 is a cross-sectional view of another perspective of the stator of the present application.

Fig. 5 is an exploded perspective view of the fan frame and the stator of the present application.

Fig. 6 is an exploded cross-sectional view of the fan frame and the stator of the present application.

Fig. 7 is an exploded perspective view of the present application.

Fig. 8 is a cross-sectional view of the present application.

Description of reference numerals:

10, a fan frame;

11, a base;

12, a frame body;

13, a bracket;

14, hollow shaft columns;

141, limit section difference;

142, an axle hole;

143, fixing blocks;

20, a stator;

21, damping inner cylinder;

211, an annular groove;

211A, positioning convex strips;

22, a silicon steel ring sheet;

221, an inner ring;

221A, a positioning notch;

222, a winding frame;

23, a coil;

24, an insulating bracket;

241, an upper part;

242 lower part;

30, a fan wheel;

31, a hub;

311, a shaft seat;

312, magnetic group;

32, a rotating shaft;

33, fan blades;

40, a bearing;

50, a spring.

Detailed Description

The following detailed description and technical contents of the present application will be described with reference to the drawings, which are provided for illustrative purposes only and are not intended to limit the present application.

The present application provides a heat dissipation fan, as shown in fig. 1 to 8, which mainly includes a fan frame 10, a stator 20 and a fan wheel 30.

The fan frame 10 includes a base 11, a frame 12, and two or more (including the number of) brackets 13, and each bracket 13 is bridged between the base 11 and the frame 12. Specifically, the frame 12 is a hollow rectangular body, and the base 11 is located inside the frame 12 and connected to the frame 12 through the brackets 13, but the present application is not limited thereto. Therefore, when the base 11 is vibrated, the vibration can be absorbed by the brackets 13, and the vibration is not directly transmitted to the frame 12 to generate noise or resonance. The base 11 is provided with a hollow shaft column 14 at the center thereof, and a stopper step 141 is formed on the outer periphery of the hollow shaft column 14.

The stator 20 mainly includes a damping inner cylinder 21 and at least two (including a number) silicon steel ring plates 22 stacked together. The inner damping cylinder 21 is sleeved on the hollow shaft post 14 and abuts against the limit step 141. The two or more silicon steel ring pieces 22 are stacked one on another, and each silicon steel ring piece 22 is sleeved on the inner damping cylinder 21. Specifically, the inner edge of each silicon steel ring 22 is clamped to the outer wall of the inner damping cylinder 21. In addition, an annular groove 211 is provided on the outer wall of the inner damping cylinder 21, and each silicon steel ring 22 is annularly clamped in the annular groove 211. Each silicon steel ring 22 includes an inner ring 221 and at least two (including a number) bobbins 222, each bobbin 222 extends radially outward from the periphery of the inner ring 221 in a cross shape, and the bobbins 222 of each silicon steel ring 22 are stacked in correspondence to each other without being staggered. The inner damping cylinder 21 has at least two (more than one) positioning protrusions 211A protruding from the annular groove 211, the inner edge of each inner ring 221 has at least two (more than one) positioning notches 221A, and each positioning protrusion 211A is engaged with each corresponding positioning notch 221A to fix each silicon steel ring 22 on the inner damping cylinder 21 without rotation. In the embodiment, the inner damping cylinder 21 is made of silicone, but the present application is not limited thereto, and for example, the inner damping cylinder 21 may be made of damping material such as rubber, plastic or sponge.

The impeller 30 includes a hub 31, a shaft 32, and two or more (including an integer) blades 33 radially extending from an outer periphery of the hub 31. The hub 31 is a generally cylindrical cover. A shaft seat 311 is disposed at the center of the hub 31, and one end of the rotating shaft 32 is embedded and fixed in the shaft seat 311. The rotating shaft 32 is pivoted in the hollow shaft post 14, and the hub 31 is covered on the periphery of the stator 20. Therefore, the vibration generated when the fan wheel 30 rotates can be absorbed and damped by the damping inner cylinder 21 outside the hollow shaft column 14, so as to greatly reduce the vibration transmitted to the base 11 by the hollow shaft column 14, and the remaining weak vibration transmitted to the base 11 can be absorbed and damped by the brackets 13 between the base 11 and the frame 12, thereby effectively eliminating the vibration and avoiding the resonance or noise caused by the vibration. In the present embodiment, the hub 31 and the blades 33 are integrally formed by plastic injection, but the present application is not limited thereto.

To explain further, the stator 20 further includes more than two (including the present number) coils 23 and an insulating support 24. The coils 23 are wound around the insulating holders 24 so as to be wound around the outside of the bobbins 222 of the silicon steel sheets 22. In the present embodiment, the number of the bobbins 222 is four, so that the number of the coils 23 is also four, but the present application is not limited thereto. The inner edge of the hub 31 is provided with a ring-shaped magnet assembly 312, so that the magnet assembly can be driven when the coil 23 is energized to generate a magnetic force, thereby rotating the impeller 30. The insulating support 24 is made of an insulating material such as plastic, but the present application is not limited thereto. The inner damping cylinder 21 and the silicon steel ring pieces 22 are disposed in the insulating support 24. Specifically, the insulating holder 24 includes an upper portion 241 and a lower portion 242, and the silicon steel ring pieces 22 are sandwiched between the upper portion 241 and the lower portion 242, and the upper portion 241 and the lower portion 242 are fixed by winding the coils 23. Therefore, each coil 23 is wound on the insulating support 24, so as to prevent each coil 23 from directly contacting each silicon steel ring plate 22 to affect the electromagnetic effect.

The heat dissipation fan of the present application further includes a bearing 40 and a spring 50. The bearing 40 is disposed in the hollow shaft column 14, and the rotating shaft 32 is rotatably disposed through the bearing 40. Specifically, the hollow shaft 14 has a shaft hole 142 passing through it, and the hollow shaft 14 has a fixing block 143 protruding from the inner edge of the shaft hole 142. The bearing 40 is tightly received in the shaft hole 142 and is clamped on the fixing block 143 to form a fixing without shaking, so that the rotating shaft 32 pivoted in the bearing 40 can ensure the stability of the fan wheel 30 during rotation without skewing. The spring 50 is disposed on the rotating shaft 32 and elastically clamped between the axle seat 311 and the bearing 40 to apply an elastic force to the axle seat 311 of the hub 31 in a direction away from the base 11. This prevents the fan wheel 30 from contacting the stator 20 and damaging the parts due to the reaction force of the airflow generated by the fan blades 33 when the fan wheel 30 is in operation.

In summary, the present application has industrial applicability, novelty and creativity, and completely accords with the patent application conditions, and the application is provided according to the patent law. The present application is capable of other embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the application, and it is intended that all such changes and modifications fall within the scope of the claims of the present application.

Claims (10)

1. A heat dissipating fan, comprising:

the fan frame comprises a base, wherein the base is provided with a hollow shaft column;

the stator comprises a damping inner cylinder and more than two silicon steel ring sheets, the damping inner cylinder is sleeved with the hollow shaft column, the more than two silicon steel ring sheets are arranged in a stacked mode, each silicon steel ring sheet is sleeved with the damping inner cylinder, and the inner edge of each silicon steel ring sheet is clamped with the outer wall of the damping inner cylinder; and

the fan wheel comprises a hub and more than two fan blades radially extending from the hub, the hub is provided with a rotating shaft, and the fan wheel is pivoted in the hollow shaft column through the rotating shaft and covers the stator with the hub.

2. The heat dissipating fan as claimed in claim 1, wherein each of the silicon steel ring segments comprises an inner ring and two or more bobbins, each of the bobbins extends outwardly from the inner ring, and the bobbins of each of the silicon steel ring segments are stacked in correspondence to each other.

3. The heat dissipating fan as claimed in claim 2, wherein the outer wall of the inner damping cylinder has an annular groove for engaging with the silicon steel ring, the inner damping cylinder has two or more positioning protrusions on the annular groove, the inner edge of each inner ring has two or more positioning notches, and each positioning protrusion engages with the corresponding positioning notch.

4. The heat dissipating fan as claimed in claim 2, wherein the stator further comprises an insulating frame, and each of the silicon steel ring sheets is disposed in the insulating frame.

5. The heat dissipating fan according to claim 4, wherein the stator further comprises more than two coils corresponding to each of the bobbins, each of the coils being wound around the insulating support and being wound around an outer side of the corresponding bobbin.

6. The heat dissipating fan as claimed in claim 1, wherein a limiting step is formed on an outer edge of the hollow shaft, and the inner damping cylinder is disposed around the hollow shaft and abuts against the limiting step.

7. The heat dissipating fan as claimed in claim 1, wherein the fan frame further comprises a frame body and two or more supports, each of the supports bridging between the base and the frame body.

8. The heat dissipating fan as claimed in claim 1, further comprising a bearing, wherein the hollow shaft has a shaft hole, a fixing block is protruded from an inner edge of the shaft hole, the bearing is tightly received in the shaft hole and engaged with the fixing block, and the rotating shaft is rotatably pivoted to the bearing.

9. The heat dissipating fan of claim 8, wherein the hub has a shaft seat therein, and one end of the shaft is embedded in the shaft seat.

10. The heat dissipating fan as claimed in claim 9, further comprising a spring, wherein the spring is disposed around the shaft and elastically clamped between the shaft seat and the bearing.

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