CN1766346A - Cooling fan impeller - Google Patents

Abstract

A heat dissipation fan impeller. In order to provide a heat dissipation device component that can amplify the airflow, improve assembly accuracy, and increase design margin, the present invention is proposed, which comprises an upper hub unit, at least one middle hub unit, a lower hub unit, and a coupling member; the outer circumferences of the upper hub unit, the middle hub unit, and the lower hub unit are independently extended with a plurality of extended blades; the upper hub unit, the middle hub unit, and the lower hub unit are sequentially axially stacked and combined with a coupling member, and the plurality of extended blades on the upper, middle, and lower hub units are staggered to form a total number of blades, and at least two extended blades are overlapped on any axis.

Description

Cooling fan impeller

technical field

The invention belongs to heat dissipation device components, in particular to a heat dissipation fan impeller.

Background technique

As shown in FIG. 1 and FIG. 2 , the impeller 1 of the axial flow heat dissipation fan is provided with a hub 11 , several fan blades 12 and a shaft 13 for coupling with the heat dissipation fan motor.

The fan blade 12 is provided with an inclined ring on the outer peripheral surface of the hub 11 so as to drive the airflow to flow axially.

Usually, the impeller 1 is formed by covering the shaft rod 13 of metal material with plastic material. However, due to the limitation of demoulding of the impeller 1 after molding, the first ends 121 and the first ends 121 of each two adjacent fan blades 12 The second ends 122 must not form an overlap on the axes of either demolding direction, respectively. Furthermore, mechanically, the total wind displacement of the impeller 1 is directly proportional to the total number of fan blades 12 or the total wind displacement area. In other words, the above-mentioned demoulding limitation of the molding must be overcome before the total number of fan blades 12 or the total wind-dispelling area can be relatively increased, thereby increasing the total air-dispelling capacity of the impeller 1 .

As shown in Figure 3 and Figure 4, another announcement number is 'No. 413273', the name is 'composite cooling fan', the announcement number is 'No. 553324', the name is 'fan wheel structure' and the announcement number is New patents such as 'No. 570493', titled 'Combined Fan Blades for Radiating Fans', the impeller 1' includes a combined hub 11' and several combined fan blades 12'.

Combined hub 11' is made up of upper hub 11a and lower hub 11b. The fan blade 12 is composed of an upper fan blade 12a arranged on the upper hub 11a and a lower fan blade 12b arranged on the lower hub 11b which are aligned and connected.

By means of the combination described above, the two ends 121 ′, 122 ′ of two adjacent combined fan blades 12 ′ can overlap on the axis X of any demoulding direction, which is beneficial to increase the total wind driving area and Total drive volume.

However, the two-layer combination of the upper hub 11a and the lower hub 11b can only form a limited number of combined fan blades 12', and the combined fan blades 12' will be caused by frequent gaps between the upper and lower layers of upper fan blades 12a and lower fan blades 12b. There are bonding defects such as bonding gaps, inaccurate bonding, or misalignment, which affect the quality of the assembly and the yield of the finished product. Based on the above factors, there is indeed still a need to further improve the existing impellers.

Contents of the invention

The purpose of the present invention is to provide a heat dissipation fan impeller with amplified dispelling air volume, improved assembly precision and increased design margin.

The present invention comprises an upper hub unit, at least one middle hub unit, a lower hub unit and a combination piece; the outer peripheral surfaces of the upper hub unit, the middle hub unit and the lower hub unit are independently extended with several extended fan blades; the upper hub unit, the middle hub unit and The lower hub units are stacked axially in sequence and combined with a connecting piece. The number of extended blades on the upper, middle and lower hub units are arranged in a staggered manner to form a total number of blades, and at least two extended blades are overlapped on any axis.

in:

The extended blade of the upper hub unit has a first end substantially flush with the top edge of the upper hub unit and a second end substantially flush with the bottom edge of the lower hub unit.

The extended fan blade of the middle hub unit has a first end substantially flush with the top edge of the upper hub unit and a second end substantially flush with the bottom edge of the lower hub unit.

The extended blade of the lower hub unit has a first end substantially flush with the top edge of the upper hub unit and a second end substantially flush with the bottom edge of the lower hub unit.

The extended blade of the upper hub unit has a first end substantially flush with the top edge of the upper hub unit and a second end substantially flush with the bottom edge of the middle hub unit.

The extended fan blade of the middle hub unit has a first end substantially flush with the top edge of the middle hub unit and a second end substantially flush with the bottom edge of the lower hub unit.

The extended blade of the lower hub unit has a first end substantially flush with the top edge of the middle hub unit and a second end substantially flush with the bottom edge of the lower hub unit.

The upper hub unit, the middle hub unit and the lower hub unit are respectively provided with a plurality of positioning pieces for precise alignment and combination.

The locating parts on the upper hub unit, the middle hub unit and the lower hub unit are recesses and protrusions that are fitted correspondingly to each other.

The joint is an iron shell.

The combination piece is provided separately for axially stacking the upper, middle and lower hub units.

The coupling part is pre-selected to be combined with one of the upper hub unit, the middle hub unit or the lower hub unit for axially stacking the upper, middle and lower hub units.

The inner center of the upper hub unit is provided with a shaft for combining with the radiator fan motor.

Since the present invention includes an upper hub unit, at least one middle hub unit, a lower hub unit and a combination; the outer peripheral surfaces of the upper hub unit, the middle hub unit and the lower hub unit are independently extended with several extended fan blades; the upper hub unit, the middle hub unit The hub unit and the lower hub unit are sequentially stacked axially and combined with a connecting piece. Several extended fan blades on the upper, middle and lower hub units are arranged in a staggered manner to form a total number of fan blades, and at least two extended fan blades are overlapped on any axis. When assembling, the upper hub unit, the middle hub unit and the lower hub unit can be axially stacked by means of a joint to form the cooling fan impeller of the present invention, and several extended fan blades of the upper hub unit, the middle hub unit and the lower hub unit can be The equidistant staggered arrangement is properly maintained, and at least two extended fan blades can be overlapped on the axis of any demoulding direction, so the total number and total wind-dispelling area of the present invention can be greatly increased. Furthermore, the several extended blades on the upper hub unit, the middle hub unit and the lower hub unit are all independently extended from the upper hub unit, the middle hub unit and the lower hub unit, therefore, there is no misalignment of the extended blades assembly defects. Thereby, not only can the relative expansion of the wind displacement and output wind pressure of the present invention be ensured, but also the assembly quality and precision of the present invention can be further increased. It not only enlarges the wind displacement, but also improves assembly precision and design margin, so as to achieve the purpose of the present invention.

Description of drawings

Fig. 1 is a schematic perspective view of an existing impeller structure.

Fig. 2 is a schematic side view of an existing impeller structure.

Fig. 3 is a schematic perspective view of the disassembled structure of the existing combined impeller.

Fig. 4 is a schematic side view of an existing combined impeller structure.

Fig. 5 is a schematic perspective view of an exploded structure of Embodiment 1 of the present invention.

Fig. 6 is a schematic sectional view of an exploded partial structure of Embodiment 1 of the present invention.

Fig. 7 is a schematic bottom view of the first embodiment of the present invention.

Fig. 8 is a schematic sectional view of a partial structure of an embodiment of the present invention.

Fig. 9 is a schematic sectional view of a partial structure of Embodiment 2 of the present invention.

Fig. 10 is a schematic sectional view of a disassembled partial structure of Embodiment 2 of the present invention.

Fig. 11 is a schematic sectional view of the partial structure of Embodiment 3 of the present invention.

Detailed ways

Embodiment one

As shown in FIG. 5 and FIG. 6 , the heat dissipation fan impeller 2 of the present invention is applied to an axial flow heat dissipation fan, which includes an upper hub unit 21 , at least one middle hub unit 22 , a lower hub unit 23 and a coupling member 24 .

The upper hub unit 21 , the middle hub unit 22 and the lower hub unit 23 can be respectively molded with plastic materials in advance, and then axially stacked with the connecting piece 24 to form the cooling fan impeller 2 of the present invention.

As shown in FIGS. 5 and 6 , the upper hub unit 21 is independently extended with several first extended blades 211 and at least one positioning member 212 .

The first extended blades 211 are in the shape of a single piece, which is fixed on the outer peripheral surface of the upper hub unit 21 , and each two adjacent first extended blades 21 do not overlap on the axis Y of any demoulding direction. Furthermore, the first end a1 of the first extended blade 211 is substantially flush with the top edge of the upper hub unit 21; the second end a2 of the first extended blade 211 extends downwards and protrudes from the bottom of the upper hub unit 21 edge outside. The positioning part 24 is formed on the bottom edge of the upper hub unit 21, and it is preferably a convex part or a concave part.

As shown in FIGS. 5 and 6 , the middle hub unit 22 is independently extended with several second extended blades 221 and at least two positioning members 222 , 223 .

The second extended blades 221 are in the shape of a single piece, which is fixed on the outer peripheral surface of the middle hub unit 22 , and each two adjacent second extended blades 221 do not overlap on the axis Y of any demoulding direction. Moreover, the first end b1 and the second end b2 of the second extended blade 221 extend upwards and downwards respectively, and protrude from the top edge and the bottom edge of the middle hub unit 22 . The two positioning parts 222 and 223 are respectively formed on the top edge and the bottom edge of the middle hub unit 22 , which are preferably concave or convex.

As shown in FIG. 5 and FIG. 6 , the lower hub unit 23 is independently extended with several third extended fan blades 231 and at least one positioning member 232 .

The third extended blades 231 are in the shape of a single piece, which is fixed on the outer peripheral surface of the lower hub unit 23 , and each two adjacent third extended blades 231 do not overlap on the axis Y of any demoulding direction. Furthermore, the first end c1 of the third extended blade 231 extends upwards and protrudes beyond the top edge of the lower hub unit 23; the second end b2 of the third extended blade 231 is substantially aligned with the lower hub unit 23 bottom edge. The positioning member 232 is formed on the top edge of the lower hub unit 23 , and is preferably a convex portion or a concave portion.

The coupling part 24 is preferably an iron shell, which can be set separately, or pre-selected to be combined with one of the upper hub unit 21 , the middle hub unit 22 or the lower hub unit 23 . Furthermore, the center of the upper hub unit 21 is preset with a shaft 25 for coupling with the radiator fan motor.

As shown in Fig. 7 and Fig. 8, during assembly, the upper hub unit 21, the middle hub unit 22 and the lower hub unit 23 can be axially superimposed using the joint 24, and can be fixed by appropriate high-frequency welding or adhesives. Composition of the cooling fan impeller 2 of the present invention. At the same time, through the precise axial alignment of the positioning members 212, 222, 223, and 232, the first extended blade 211, the second extended blade 221, and the third extended blade 231 can properly maintain a staggered relationship with equal intervals. . After assembly, the first ends a1, b1, and c1 of the first, second, and third extension blades 211, 221, and 231 are substantially aligned with the top edge of the upper hub unit 21; the first, second, and third extension blades The second ends a2 , b2 , c2 of the leaves 211 , 221 , 231 are substantially aligned with the bottom edge of the lower hub unit 23 at the lowermost end. At least two of the first, second, and third extended fan blades 211, 221, and 231 can be overlapped on the axis Y of any demoulding direction, so the total number of cooling fan impellers 2 and the total wind displacement of the present invention can be greatly increased. area. Furthermore, as far as the single extension blade among the first, second, and third extension blades 211, 221, 231 is concerned, since the first, second, and third extension blades 211, 221, 231 are all independently formed by the upper hub unit 21, The middle hub unit 22 and the lower hub unit 23 are formed by extension. Therefore, the extension blades of the first, second, and third extension blades 211 , 221 , 231 do not have assembly defects of misalignment. Thereby, not only can the relative expansion of the wind displacement and output wind pressure of the present invention be ensured, but also the assembly quality and precision of the present invention can be further increased.

Embodiment two

As shown in FIG. 9 , the cooling fan impeller 2 a of the present invention includes an upper hub unit 21 a , at least one middle hub unit 22 a , a lower hub unit 23 a and a combination.

The upper, middle, and lower hub units 21a, 22a, and 23a are separately extended with a plurality of first, second, and third extended fan blades 211a, 221a, 231a and positioning members 212a, 222a, 223a, 232a.

The relative extended positions of the first, second, and third extended fan blades 211a, 221a, and 231a are appropriately changed according to usage requirements. For example, the first end a1 of the first extended blade 211a of the upper hub unit 21a is substantially flush with the top edge of the upper hub unit 21a, and the second end a2 only extends downward to the bottom edge of the middle hub unit 22a. The first end b1 of the second extended blade 221a of the middle hub unit 22a is substantially flush with the top edge of the middle hub unit 22a, and the second end b2 extends downward to the bottom edge of the lower hub unit 23a. The first end c1 of the third extended blade 231a of the lower hub unit 23a is substantially flush with the top edge of the middle hub unit 22a, and the second end c2 extends downward to the bottom edge of the lower hub unit 23a. In this way, the present invention not only ensures the relative expansion of the air displacement and assembly quality, but also further increases the design margin.

Embodiment Three

As shown in FIG. 10 and FIG. 11 , the cooling fan impeller 3 of the present invention is applied to an axial-flow cooling fan, which includes an upper hub unit 31 , at least two middle hub units 32 , 33 , a lower hub unit 34 and a connecting piece 35 .

The upper hub unit 31 , the middle hub units 32 , 33 and the lower hub unit 34 can be respectively molded with plastic materials in advance, and then axially laminated with the joint member 35 to form the cooling fan impeller 3 of the present invention.

A plurality of first extended fan blades 311 and at least one positioning member 312 are separately extended from the outer peripheral surface of the upper hub unit 31 . The first extended blade 311 has a first end d1 and a second end d2. The first extended blades 311 are in the shape of a single piece, and each two adjacent first extended blades 311 do not overlap on the axis Z of any demoulding direction. Moreover, the first end d1 of the first extended blade 311 is substantially flush with the top edge of the upper hub unit 31; the second end d2 of the first extended blade 311 extends downwards and protrudes from the bottom of the upper hub unit 31 edge. The positioning part 312 is formed on the bottom edge of the upper hub unit 31 , which is preferably a convex portion or a concave portion.

A plurality of second extended fan blades 321 and at least two positioning members 322 and 323 are separately extended from the outer peripheral surface of the middle hub unit 32 . The second extended blade 321 has a first end e1 and a second end e2. The second extended blades 321 are in a single piece shape, and each two adjacent second extended blades 321 do not overlap on the axis Z of any demoulding direction. Furthermore, the first end e1 and the second end e2 of the second extended blade 321 extend upwards and downwards respectively, and protrude from the top edge and the bottom edge of the middle hub unit 32 . The two positioning parts 322 and 323 are respectively formed on the top edge and the bottom edge of the middle hub unit 32 , which are preferably concave or convex.

A plurality of third extending blades 331 and at least two positioning members 332 and 333 are separately extended from the outer peripheral surface of the middle hub unit 33 . The third extended blade 33 has a first end f1 and a second end f2. The third extended blades 33 are in a single piece shape, and each two adjacent third extended blades 33 do not overlap on the axis Z of any demoulding direction. Moreover, the first end f1 and the second end f2 of the third extended blade 33 extend upwards and downwards respectively, and protrude from the top edge and the bottom edge of the middle hub unit 33 . Two positioning parts 332 and 333 are respectively formed on the top edge and the bottom edge of the middle hub unit 33 , which are preferably concave or convex.

A plurality of fourth extended blades and at least one positioning member 342 are separately extended from the outer peripheral surface of the lower hub unit 34 . The fourth extended blade 341 has a first end g1 and a second end g2. The fourth extended blades 341 are in the form of a single piece, and each two adjacent fourth extended blades 341 do not overlap on the axis Y of any demoulding direction. Moreover, the first end g1 of the fourth extended blade 341 extends upwards and protrudes beyond the top edge of the lower hub unit 34; the second end g2 of the fourth extended blade 341 is substantially aligned with the lower hub unit 34. bottom edge. The positioning part 35 is formed on the top edge of the lower hub unit 34, and it is preferably a convex part or a concave part.

The coupling part 35 is preferably an iron shell, which can be set separately, or pre-selected to be coupled to one of the upper hub unit 31 , at least two middle hub units 32 , 33 or the lower hub unit 34 . Furthermore, the center of the upper hub unit 31 is preset with a shaft 36 for coupling with the radiator fan motor.

As shown in Figure 11, during assembly, the upper hub unit 31, at least two middle hub units 32, 33, and the lower hub unit 34 can be axially stacked using a joint 35, and can be welded by appropriate high-frequency welding or adhesives, etc. Way to form the cooling fan impeller 3 of the present invention. At the same time, through the precise axial alignment of the positioning members 312, 322, 323, 332, 333, 342, the first extended blade 311, the second extended blade 321, the third extended blade 331 and the fourth extended blade 341 will properly maintain the staggered relationship of equal spacing. After assembly, the first ends d1, e1, f1, g1 of the first, second, third, and fourth extended fan blades 311, 321, 331, 341 are all substantially aligned with the top edge of the upper hub unit 31; The second ends d2 , e2 , f2 , g2 of the third and fourth extended blades 311 , 321 , 331 , 341 are substantially aligned with the bottom edge of the lower hub unit 34 . By arranging the upper hub unit 31 , at least two middle hub units 32 , 33 and the lower hub unit 34 , the present invention can increase the design margin.

As mentioned above, there is often a joint gap with the existing cooling fan impeller 1 which only has two layers of hubs 11a, 11b and has a relatively low design margin and the combined fan blade 12' consisting of the upper fan blade 12a and the lower fan blade 12b. Compared with the shortcomings such as inaccurate bonding or assembly deviation, the present invention sets at least three layers of hub units 21, 22, 23, and utilizes the extended fan blades 211, 221, 231 formed by extending each hub unit 21, 22, 23 independently, And all the extended blades 211, 221, 231 are staggered to form a total number of extended blades, which can indeed relatively increase the driving air volume and output wind pressure of the present invention, increase the assembly quality and precision, and further increase the design margin.

Claims (13)

1, a kind of impeller of heat radiating fan, it comprises hub and lower hub unit; Be provided with hub at least one that combines with last hub and lower hub unit by conjunction between the last hub of stating that it is characterized in that and the lower hub unit; Last hub, middle hub and lower hub unit outer circumferential face extension separately are provided with several extension flabellums; Last hub, middle hub and lower hub unit by using conjunction carry out axially superimposed, and several extension flabellums are staggered to total flabellum quantity on the hub of upper, middle and lower, and flabellum is extended at least two of overlapping settings on arbitrary axis.

2, impeller of heat radiating fan according to claim 1 is characterized in that the described extension flabellum of going up hub has to trim in first end of the apical margin of last hub in fact and trim in fact in second end of the root edge of lower hub unit.

3, impeller of heat radiating fan according to claim 1, it is characterized in that described in the extension flabellum of hub have and trim in first end of the apical margin of last hub in fact and trim in fact in second end of the root edge of lower hub unit.

4, impeller of heat radiating fan according to claim 1, the extension flabellum that it is characterized in that described lower hub unit have and trim in first end of the apical margin of last hub in fact and trim in fact in second end of the root edge of lower hub unit.

5, impeller of heat radiating fan according to claim 1 is characterized in that the described extension flabellum of going up hub has to trim in first end of the apical margin of last hub in fact and trim in fact in second end of the root edge of middle hub.

6, impeller of heat radiating fan according to claim 1, it is characterized in that described in the extension flabellum of hub have and trim in first end of the apical margin of middle hub in fact and trim in fact in second end of the root edge of lower hub unit.

7, impeller of heat radiating fan according to claim 1, the extension flabellum that it is characterized in that described lower hub unit have and trim in first end of the apical margin of middle hub in fact and trim in fact in second end of the root edge of lower hub unit.

8, impeller of heat radiating fan according to claim 1 is characterized in that described corresponding respectively several locating pieces that are provided with so as to accurate contraposition combination in hub, middle hub and lower hub unit of going up.

9, impeller of heat radiating fan according to claim 8 is characterized in that the described locating piece of going up on hub, middle hub and the lower hub unit is corresponding chimeric mutually recess, protuberance.

10, impeller of heat radiating fan according to claim 1 is characterized in that described conjunction is an iron-clad.

11, impeller of heat radiating fan according to claim 10 is characterized in that described conjunction is for being provided with separately, for axial superimposed upper, middle and lower hub.

12, impeller of heat radiating fan according to claim 10, it is characterized in that described conjunction one of is selected to be incorporated in hub, middle hub or the lower hub unit in advance on, for axial superimposed upper, middle and lower hub.

13, impeller of heat radiating fan according to claim 1 is characterized in that the described hub central interior that goes up is provided with so as to the axostylus axostyle in conjunction with the heat-dissipating fan motor.

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