TW201432155A - Impeller - Google Patents

Abstract

An impeller is made of metal may be applied to micro-cooling fan, and it can solve problem of strength and noise. The impeller comprises a wheel and a plurality of metal vanes. Each vane has a vane body and two connecting slices, one end of the vane body combined with the wheel, and the two connecting slices formed on another end of the vane body and set on the opposite side of the vane body, respectively. Each connecting slice has a first connected portion and a matching second connected portion. In which, the first connected portion of each metal vane engaged with the second connected portion of adjacent metal vane, all of the connecting slices of the metal vanes can connected and surround to form a connected ring.

Description

Fan wheel

The present invention relates to a fan wheel; in particular, a fan wheel which can be applied to a micro cooling fan and whose blade is made of metal.

Generally, the fan wheel system includes a hub and a plurality of blades disposed around the hub, and the plurality of blades are mostly formed by a conventional plastic injection or metal stamping; however, the plastic flow during the injection of the conventional plastic and the plastic itself are The thermal deformation characteristics do have some difficulties in the fabrication of miniaturized blades. Even after the forming of the fan wheel, the structural strength between the blades and the hub is still of concern to the industry, so that the fan wheel of the plastic injection molding is limited. It is not available for all types of fans. Therefore, the fan wheel of the micro cooling fan still has a large selection of metal stamping.

The Republic of China Publication No. I292014 discloses an ultra-thin fan 9 comprising a base 91, a fan wheel 92, an assembly member 93, a piece of magnet 94 and a shaft 95. The fan wheel 92 is integrally stamped from a metal plate. The fan wheel 92 defines a shaft hole 921, a ring plate 922, a plurality of intermediate holes 923, and a plurality of blades 924. The shaft hole 921 is formed on the ring plate. The central position of the 922 can be combined with the assembly member 93; the intermediate hole 923 is located at the outer periphery of the ring plate 922 and is located between the adjacent blades 924, and the blade 924 is bent adjacent to the side of the hole 923. Folding an airfoil.

The manner of directly forming the plurality of blades 924 through the sheet metal sheet is limited by the number of the blades 924 that can be formed, so that the fan wheel 92 is suitable for the conventional ultra-thin fan 9 because of the number of fans. The number of the blades 924 is limited, so that the ultra-thin fan 9 cannot achieve a better driving airflow effect, and the output air volume and wind pressure are not satisfactory.

For example, the Republic of China Publication No. M376655 discloses another combined fan wheel structure 8, which includes a hub 81 and at least one blade 82. Wherein, the hub 81 has a top portion 811 extending from a side portion 812, the side portion 812 being free from one end of the top portion 811 as a free end 813; the at least one blade 82 is made of metal stamping, the at least one blade The 82 series has at least a pair of joints 821 that are coupled to the free end 813 of the hub 81 by any means such as fitting, snapping, engaging, splicing, and plugging.

However, the manner in which the blade 82 is formed by metal stamping and the at least one blade 82 is coupled to the hub 81 is often susceptible to poor bonding strength between the blades 82 and the hub 81, and the number of blades 82 is less than each other. The supportable member structure, so that the conventional combined fan wheel structure 8 is used in a general heat dissipation fan, the rotation of the noise will be caused due to insufficient structural strength, and the normal operation of the heat dissipation fan is affected.

In view of the above factors, the present invention provides a fan wheel that is different from the conventional ones, and is particularly applicable to a micro cooling fan to solve various problems as described above.

SUMMARY OF THE INVENTION The main object of the present invention is to improve the above problems to provide a fan wheel having a better structural strength and which can be applied to a micro cooling fan while avoiding the generation of rotational noise.

The second object of the present invention is to provide a fan wheel having a large number of metal blades, and can be applied to a micro cooling fan to improve the driving performance.

For the purpose of the present invention, the fan wheel of the present invention comprises: a hub; and a plurality of metal blades each having a blade body and two connecting pieces, one end of the blade body being coupled to the outer circumference of the hub, the two The connecting piece is disposed at the other end of the blade body and respectively located at opposite side edges of the blade body, and the two connecting pieces each have a first joint portion and a second joint portion that are matched with each other; The first joint of the leaf is combined with the second joint of the adjacent metal blade, and each of the connecting pieces of the plurality of metal blades meets and surrounds a connecting ring.

Wherein the two connecting pieces of the plurality of metal blades are on the same side of the blade body Extending and facing in the axial direction of the hub.

Each of the two connecting pieces of the plurality of metal blades extends toward the opposite side of the blade body and is phase-displaced in the direction in which the plurality of metal blades are arranged.

Each of the blade bodies of the plurality of metal blades further forms an auxiliary air guiding portion, and the auxiliary air guiding portion is located at an end of the blade body not contacting the outer periphery of the hub, and protrudes from the two connecting pieces. Outside.

The auxiliary air guiding portion has a flow guiding end formed by cutting a corner of the auxiliary air guiding portion.

The two connecting pieces of the metal blade extend toward the same side of the blade body, and in the axial direction of the hub, the connecting piece located on the lower side of the blade body is connected to the auxiliary guiding portion. The end edge of the flow guiding end is provided.

Wherein, the hub is integrally coated with one end of each of the blade bodies of the plurality of metal blades by plastic injection.

Wherein, each of the blade bodies of the plurality of metal blades is provided with a through hole at one end of the outer periphery of the hub, and a peripheral portion of the hub is embedded in the through hole.

Wherein, the first joint portion forms a hook portion, and the second joint portion forms a slot.

Wherein, the hub has a top portion and a ring wall portion, the ring wall portion is disposed on a periphery of the top side, and the top portion is provided with a rotating shaft.

The hub has a top portion and a ring wall portion. The ring wall portion is disposed on a periphery of the top side, and a permanent magnet is disposed on an inner wall of the ring wall portion.

The wheel hub has a top portion and a ring wall portion. The ring wall portion is disposed on a periphery of the top side. The top portion is provided with a rotating shaft. The inner wall of the ring wall portion is provided with a permanent magnet.

Wherein, the hub has a top portion and a ring wall portion, and the ring wall portion is disposed on the outer periphery of the top side, and the inner wall of the ring wall portion is provided with a permanent magnet and a magnetic ring, and the magnetic sealing ring is covered by the magnetic ring The permanent magnet is peripherally located between the ring wall portion and the permanent magnet.

The wheel hub has a top portion and a ring wall portion. The ring wall portion is disposed on a periphery of the top side. The top portion is provided with a rotating shaft. The inner wall of the ring wall portion is provided with a permanent magnet and a magnetic ring. The magnetic ring is wrapped around the outer circumference of the permanent magnet and between the ring wall portion and the permanent magnet.

〔this invention〕

1‧‧·wheels

11‧‧‧ top

12‧‧‧ Ring Wall

13‧‧‧Rotary axis

14‧‧‧ permanent magnet

2‧‧‧metal fan blades

21‧‧‧ blade body

211‧‧‧Perforation

22, 22’‧‧‧ Connections

221‧‧‧ first joint

222‧‧‧Second junction

23‧‧‧Assisted drafting department

24‧‧ ‧ diversion

S, S’‧‧‧ connecting ring

[study]

9‧‧‧Slim fan

91‧‧‧Base

92‧‧‧fan wheel

921‧‧‧Axis hole

922‧‧‧ Ring plate

923‧‧ ‧ holes

924‧‧‧ fan leaves

93‧‧‧Assembly components

94‧‧‧Slice magnet

95‧‧‧ shaft

8‧‧‧Combined fan wheel structure

81‧‧·wheels

811‧‧‧ top

812‧‧‧ side

813‧‧‧Free end

82‧‧‧ leaves

821‧‧‧Docking Department

Figure 1 is a perspective exploded view of a conventional ultra-thin fan.

Figure 2 is a perspective exploded view of a conventional combined fan wheel structure.

Figure 3 is a perspective exploded view of the fan wheel of the present invention.

Figure 4 is a schematic cross-sectional view of the fan wheel of the present invention.

Fig. 5 is a schematic view showing the combined structure of the fan wheel of the present invention.

Figure 6 is a schematic view showing the structure of another type of fan blade of the fan wheel of the present invention.

Figure 7 is a perspective exploded view showing another aspect of the fan wheel of the present invention.

Figure 8 is a schematic cross-sectional view showing another aspect of the fan wheel of the present invention.

Figure 9 is a perspective exploded view showing another aspect of the fan wheel of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt; It is a preferred embodiment of the present invention. The fan wheel includes a hub 1 and a plurality of metal blades 2, and the plurality of metal blades 2 are disposed on the outer circumference of the hub 1.

The hub 1 has a top portion 11 and a ring wall portion 12. The ring wall portion 12 is disposed on the outer periphery of the top portion 11 and the top portion 11 is provided with a rotating shaft 13. The inner wall of the ring wall portion 12 is provided with a ring. Permanent magnet 14. Wherein, the hub 1 can be plastic injection molding, or The outer circumference of the permanent magnet 14 may be covered with a magnetic ring (not shown) so that the magnetic ring is interposed between the ring Between the portion and the permanent magnet, the permanent magnet 14 is prevented from being magnetically leaked.

Please refer to FIGS. 3 and 4 , the metal blade 2 is disposed on the outer circumference of the hub 1 , and the metal blade 2 is preferably formed by stamping. The metal blade 2 includes a blade body 21 and two connections. Sheet 22. One end of the blade body 21 is coupled to the outer periphery of the hub 1. The combination of the embodiment of the present invention may be such that the hub 1 is integrally coated with one end of the blade body 21 by plastic injection, and the blade body 21 may further be provided with a through hole 211. When the hub 1 is formed by plastic injection, the plastic can be poured into the through hole 211, so that the outer peripheral portion of the hub 1 is embedded in the through hole 211, so that the combination of the blade body 21 and the hub 1 is stronger and tighter to enhance The structural strength of the metal blade 2 combined with the hub 1 is structural strength.

The two connecting pieces 22 are preferably located at the other end of the blade body 21, and the two connecting pieces 22 can be fixed to the blade body 21 by various combinations such as welding, riveting, bonding, etc., in this embodiment, the two connections The sheet 22 is directly bent and formed by the blade body 21.

Each of the two connecting pieces 22 of the plurality of metal blades 2 may be located at opposite side edges of one end of the blade body 21, and the two connecting pieces 22 may face the same side of the blade body 21 (ie, as shown in FIG. 3 The right side or the left side extends to be opposite to the axial direction of the hub 1; or, as shown in FIG. 6, each of the two connecting pieces 22 of the plurality of metal blades 2 can be integrally formed The upper and lower side edges of the blade body 21, and the two connecting pieces 22 extend toward the opposite sides of the blade body 21 (ie, the left and right sides of the drawing), and are arranged in the direction of the arrangement of the plurality of metal blades 2 Phase error.

As shown in FIG. 3 and FIG. 4 , the two connecting pieces 22 each have a first joint portion 221 and a second joint portion 222 that are matched with each other. The first joint portion 221 and the second joint portion 222 can be In combination, the combination may be a matching configuration of various assembly methods such as fastening, attaching, fitting, and the like, but the configuration is not limited; for example, as shown, the first joint portion 221 is shown. A hook portion is formed, and the second joint portion 222 is formed into a slot. Thereby, each of the metal blades 2 provided on the outer circumference of the hub 1 can be combined with the second joint portion 222 of the other adjacent metal blade 2 with the first joint portion 221 to make the metal Each of the connecting pieces 22 of the blade 2 is in contact with each other and is surrounded by a connecting ring S; that is, as shown in FIG. 5, the adjacent metal blades 2 are combined by two connecting pieces 22 to form upper and lower sides. a connecting ring S, so that the number of blade bodies 21 can be firmly coupled to each other, and the fan wheel of the invention is formed together with the hub 1 to further apply to the micro cooling fan, thereby improving the structural strength of the fan wheel and reducing Noise and other effects when the fan wheel rotates.

In summary, the main technical feature of the fan wheel of the present invention is that the plurality of metal blades 2 are formed with the blade body 21 and the two connecting pieces 22, so that the first connecting portions can be matched by the two connecting pieces 22. 221 and the second joint portion 222, so that the plurality of metal blades 2 provided on the outer circumference of the hub 1 can be combined with the second joint portion 222 of the adjacent metal blade 2 by the first joint portion 221 thereof and formed around One connection ring S is connected to the upper and lower sides. In this way, the fan wheel system of the present invention can have better structural strength and is suitable for a micro cooling fan to prevent the generation of rotational noise caused by the rotating vibration of the metal blade 2; even, the fan wheel of the present invention is also visible. The number of metal blades is selected to suit the micro-cooling fan, and the effect of improving the driving performance is further improved.

Please refer to FIGS. 7 and 8 , which are the second preferred embodiment of the present invention. The present embodiment is composed of a hub 1 and a plurality of metal blades 2 , which are the same as the first embodiment. One end is coupled to the outer circumference of the hub 1 , and the plurality of metal blades 2 are also formed with the blade body 21 and the two connecting pieces 22 , and the two connecting pieces 22 can extend toward the same side of the blade body 21 to be in a relative position. Or extending toward the opposite side of the blade body 21 to be phase-displaced. The difference between this embodiment is that each of the blade bodies 21 of the plurality of metal blades 2 further forms an auxiliary air guiding portion 23, and the auxiliary air guiding portion 23 is located at an end of the blade body 21 not contacting the outer periphery of the hub 1. And the auxiliary air guiding portion 23 is formed to protrude from the outer side of the two connecting pieces 22, and the auxiliary air guiding portion 23 can further increase the overall driving efficiency of the plurality of metal blades 2; and the auxiliary guiding The wind portion 23 can also have a flow guiding end 24 which is formed by one corner of the auxiliary air guiding portion 23 Cut to increase airflow guidance.

In this way, when the fan wheel of the present invention is applied to the micro cooling fan, the air volume is increased by the auxiliary air guiding portion 23, and a flow guiding space is formed between the air guiding end 24 and the air inlet of the fan. Show), so that the outside airflow is easy to circulate in the fan.

Moreover, please refer to FIG. 9 again. Based on the foregoing second embodiment, the difference in this embodiment is that the two connecting pieces 22, 22' provided by the metal blade 2 can face the blade. The same side of the body 21 extends and is offset from each other in the axial direction of the hub 1; as shown in the figure, the connecting piece 22' located on the lower side of the blade body 21 is preferably connected to the auxiliary air guiding portion 23. The end edge of the flow guiding end 24 is not provided, and the connecting piece 22 located on the upper side of the blade body 21 is misaligned. Thus, when the connecting pieces 22, 22' are connected to the upper and lower connecting rings S, S', the fan wheel of the present invention can be applied to the micro cooling fan due to the phase misalignment of the connecting rings S, S'. , can improve the stability of the rotation of the fan wheel.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧·wheels

11‧‧‧ top

12‧‧‧ Ring Wall

13‧‧‧Rotary axis

14‧‧‧ permanent magnet

2‧‧‧metal fan blades

21‧‧‧ blade body

211‧‧‧Perforation

22‧‧‧Connecting piece

221‧‧‧ first joint

222‧‧‧Second junction

S‧‧‧ connecting ring

Claims (16)

A fan wheel includes: a hub; and a plurality of metal blades each having a blade body and two connecting pieces, one end of the blade body being coupled to the outer circumference of the hub, the two connecting pieces being located at the other end of the blade body and respectively located at the The opposite side edges of the blade body, and the two connecting pieces each have a first joint portion and a second joint portion that are matched with each other; the plurality of metal blades each have a first joint portion and an adjacent metal blade The second joints are combined, and each of the connecting pieces of the plurality of metal blades are joined and surround each other to form a connecting ring. The fan wheel according to the first aspect of the invention, wherein each of the blade bodies of the plurality of metal blades further forms an auxiliary air guiding portion, the auxiliary air guiding portion being located at an end of the blade body not contacting the outer periphery of the hub And protrudes from the outer side of the two connecting pieces. The fan wheel of claim 2, wherein the auxiliary air guiding portion has a flow guiding end formed by cutting a corner of the auxiliary air guiding portion. A fan wheel according to the first, second or third aspect of the invention, wherein the two connecting pieces of the plurality of metal blades extend toward the same side of the blade body and are in opposite positions in the axial direction of the hub. The fan wheel of claim 1, wherein the two connecting pieces of the plurality of metal blades extend toward opposite sides of the blade body and are in the direction of arrangement of the plurality of metal blades. dislocation. A fan wheel according to claim 1 or 2, wherein the two connecting pieces provided by the metal blade extend toward the same side of the blade body and are mutually displaced in the axial direction of the hub. The fan wheel of claim 3, wherein the two connecting pieces of the metal blade extend toward the same side of the blade body and are in the axial direction of the hub Mutual misplacement. The fan wheel according to the seventh aspect of the invention, wherein the connecting piece on the lower side of the blade body is connected to an end edge of the auxiliary air guiding portion where the flow guiding end is not provided. A fan wheel according to the first, second or third aspect of the invention, wherein the hub is integrally coated with one end of each of the blade bodies of the plurality of metal blades by plastic injection. The fan wheel of claim 9, wherein each of the blade bodies of the plurality of metal blades is provided with a perforation at one end of the outer periphery of the hub, and the outer peripheral portion of the hub is embedded in the perforation. A fan wheel according to the first, second or third aspect of the invention, wherein the first joint portion forms a hook portion, and the second joint portion forms a slot. A fan wheel according to the first, second or third aspect of the invention, wherein the hub has a top portion and a ring wall portion, the ring wall portion is disposed on a periphery of the top side, and the top portion is provided with a rotating shaft. A fan wheel according to the first, second or third aspect of the patent application, wherein the hub has a top portion and a ring wall portion, the ring wall portion is disposed on a periphery of the top side, and the inner wall of the ring wall portion is provided with a permanent magnet. A fan wheel according to claim 12, wherein a permanent magnet is disposed on an inner wall of the ring wall. A fan wheel according to the first, second or third aspect of the patent application, wherein the hub has a top portion and a ring wall portion, the ring wall portion is disposed on a periphery of the top side, and the inner wall of the ring wall portion is provided with a permanent The magnet and a magnetic ring are wrapped around the outer circumference of the permanent magnet and between the ring wall portion and the permanent magnet. According to the fan wheel of claim 12, the inner wall of the ring wall portion is provided with a permanent magnet and a magnetic ring, and the magnetic sealing ring is wrapped around the outer circumference of the permanent magnet and interposed between the ring wall portion and the permanent magnet. between.