Fan wheel and cooling fan with same

Abstract

A fan wheel is used for solving the problem that an existing fan wheel is prone to shaking when rotating. Comprising a hub, the hub is provided with a ring wall, the ring wall is provided with an axial end face, the ring wall extends outwards in the radial direction to form an extending part, the ring wall is combined with a connecting part, the connecting part is provided with an axial bottom face, the axial bottom face is directly connected with the extending part, and the axial bottom face and the axial end face of the ring wall are not connected and have a segment difference; and the fan blades are connected with the connecting part so as to surround the hub. The utility model further relates to a cooling fan with the fan wheel. Therefore, the stable rotation effect of the fan wheel can be achieved.

Description

Technical Field

[0001] The utility model relates to a wind driving device, in particular to a fan wheel. Background Art

[0002] Please refer to Figure 1 , Figure 2 A hub 9 of an existing impeller has a top 91 and a ring wall 92, and a plurality of blades 93 are connected to the ring wall 92. The plurality of blades 93 are usually coated on the ring wall 92 by injection molding. In other words, the hub 9 is placed in an injection space 95 in a mold 94 having an upper and lower molds that can be opened and closed. After the injection space 95 is injected, the hub 9 and the plurality of blades 93 can be integrally formed.

[0003] However, when the plurality of blades 93 are formed, the plurality of blades 93 need to be flush with the lower edge of the annular wall portion 92 of the hub 9. Therefore, when the hub 9 is placed in the injection space 95, the lower edge of the annular wall portion 92 must abut against the mold 94, so that the plurality of blades 93 after injection molding can be flush with the lower edge of the annular wall portion 92 without forming burrs. In this way, when the upper and lower molds of the mold 94 are closed, when the force of the lower mold of the mold 94 against the end edge of the annular wall portion 92 is too large, the annular wall portion 92 will be impacted and damaged or warped, causing the impeller to be unable to rotate smoothly in the fan device and to shake.

[0004] In view of this, the structure of the existing impeller still needs to be improved. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide a fan wheel and a heat dissipation fan having the fan wheel, wherein the fan wheel is not prone to shaking when rotating.

[0006] The directions or their approximate terms described throughout the present invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inside", "outside", "side", etc., mainly refer to the directions of the attached drawings, and each direction or its approximate terms are only used to assist in the explanation and understanding of the various embodiments of the present invention, and are not used to limit the present invention.

[0007] The quantifiers “a” or “an” used in the elements and components described throughout the present invention are only for convenience of use and to provide a general meaning of the scope of the present invention; in the present invention, they should be interpreted as including one or at least one, and a single concept also includes multiple situations, unless it is obvious that it means otherwise.

[0008] The similar terms such as "combination", "assembly" or "assembly" mentioned throughout the present invention mainly include the connection that can be separated without damaging the components, or the connection that makes the components inseparable. Those skilled in the art can choose according to the materials of the components to be connected or the assembly requirements.

[0009] The fan wheel of the utility model comprises: a hub having an annular wall, the annular wall having an axial end face, the annular wall extending radially outward to form an extension portion, the annular wall being combined with a connecting portion, the connecting portion having an axial bottom surface, the axial bottom surface being directly connected to the extension portion, so that the axial bottom surface and the axial end face of the annular wall are not connected but have a step difference; and a plurality of fan blades connected to the connecting portion to be arranged around the hub.

[0010] Therefore, the impeller of the utility model is not connected to the axial end surface of the ring wall through the axial bottom surface of the connecting portion. Therefore, when the connecting portion is injection molded, the mold does not need to abut against the axial end surface of the ring wall, which can reduce the risk of the mold axially impacting the axial end surface of the ring wall, avoid damage to the impeller and affect the rotation stability of the impeller, and achieve the effect of stable rotation of the impeller.

[0011] The hub has a plate body, one end of the ring wall is connected to the periphery of the plate body, the geometric center of the plate body has a rotating shaft, and the rotating shaft and the plate body are laser welded together, so that the hub and the rotating shaft are firmly combined.

[0012] The axial height of the annular wall is less than or equal to 10 mm, which is beneficial to the thinning of the hub.

[0013] The extension portion has an upper end edge and a lower end edge, a radial end surface is formed between the upper end edge and the lower end edge, and the axial bottom surface of the connecting portion is connected to the radial end surface. In this way, the axial bottom surface of the connecting portion and the axial end surface of the ring wall can form a step difference.

[0014] The axial bottom surface of the connecting portion is connected to the upper end edge, so that the axial bottom surface of the connecting portion and the axial end surface of the ring wall can form a step difference.

[0015] The axial distance from the axial bottom surface of the connecting portion to the lower edge of the extending portion is less than or equal to the axial distance from the upper edge of the extending portion to the lower edge of the extending portion. In this way, the axial bottom surface of the connecting portion can be disconnected from the axial end surface of the annular wall.

[0016] The axial distance from the axial bottom surface of the connecting portion to the lower edge of the extending portion is greater than or equal to half of the axial distance from the upper edge to the lower edge of the extending portion. In this way, the connecting portion and the extending portion can have a larger bonding area.

[0017] The axial bottom surface of the connecting portion has a notch, and the notch surrounds and is adjacent to the extending portion, so that the axial bottom surface of the connecting portion is not connected to the axial end surface of the annular wall.

[0018] The heat dissipation fan of the utility model comprises: a fan frame having a shaft tube; a stator located at the outer periphery of the shaft tube; and the fan wheel, which is rotatably arranged on the shaft tube. Thus, the heat dissipation fan having the fan wheel can operate normally through the stable rotation of the fan wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Schematic diagram of an existing wheel hub located in a mold;

[0020] Figure 2 : Schematic diagram of the existing wheel hub against the mold;

[0021] Figure 3 : An exploded perspective view of the first embodiment of the heat dissipation fan of the utility model;

[0022] Figure 4 : A partial three-dimensional diagram of the fan wheel of the utility model;

[0023] Figure 5 :like Figure 4 The partial cross-sectional view shown;

[0024] Figure 6 : The hub of the fan wheel of the utility model abuts against the schematic diagram of the mold;

[0025] Figure 7 : A partial three-dimensional view of the fan wheel of the second embodiment of the utility model;

[0026] Figure 8 :like Figure 7 The partial cross-sectional view shown.

[0027] Description of Reference Numerals

[0028] ﹝This utility model﹞

[0029] 1: Wheel Hub

[0030] 11: Plate body

[0031] 12: Ring Wall

[0032] 121: Axial end face

[0033] 13: Permanent magnet

[0034] 14: Extension

[0035] 14a: Radial end face

[0036] 141: Upper edge

[0037] 142: Lower edge

[0038] 15: Connection

[0039] 151: Axial bottom surface

[0040] 152: Missing slot

[0041] 2: Fan Blades

[0042] 3: Cooling fan

[0043] 31: Fan frame

[0044] 31a: Base

[0045] 31b: Upper cover

[0046] 32: Axle tube

[0047] 33: Stator

[0048] H: Through hole

[0049] P: Fan wheel

[0050] K: Rotating shaft

[0051] S: Storage space

[0052] T1, T2: axial distance

[0053] ﹝existing﹞

[0054] 9: Wheel Hub

[0055] 91: Top

[0056] 92: Ring Wall

[0057] 93: Fan Blade

[0058] 94: Mould

[0059] 95: Filling space. DETAILED DESCRIPTION

[0060] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are specifically cited below and described in detail with reference to the accompanying drawings; in addition, those marked with the same symbols in different drawings are regarded as the same and their descriptions are omitted.

[0061] Please refer to Figure 3 As shown, it is the first embodiment of the fan wheel P of the utility model, including a hub 1 and a plurality of fan blades 2, and the plurality of fan blades 2 surround the hub 1.

[0062] The hub 1 has a rotation axis K at its geometric center. The present invention does not limit the material of the hub 1 and the structure and method of connecting the hub 1 to the rotation axis K. For example, the hub 1 can be coupled to the rotation axis K by injection coating, or by tight fitting or laser welding.

[0063] Please refer to Figure 4 , Figure 5 As shown, the hub 1 has a plate body 11 and a ring wall 12. The rotating shaft K is connected to the plate body 11. In this embodiment, the plate body 11 can be made of metal. The plate body 11 and the rotating shaft K are combined by laser welding, so that the plate body 11 and the rotating shaft K have better combination stability. One end of the ring wall 12 is connected to the periphery of the plate body 11, and the other end of the ring wall 12 extending axially is a free end that is not connected to the plate body 11, so that the ring wall 12 has an axial end surface 121 at the free end. In this way, the plate body 11 and the ring wall 12 can jointly form an accommodating space S. In addition, the hub 1 can have a plurality of through holes H, and the plurality of through holes H can be located in the plate body 11 or the ring wall 12. In this embodiment, the plurality of through holes H are located at the connection between the plate body 11 and the ring wall 12. The plurality of through holes H can be used for the injection molding injection material to penetrate, so that the injection material can form a tight combination with the wheel hub 1 after solidification (detailed description later). In addition, the axial height of the ring wall 12 is preferably less than or equal to 10 mm, so as to facilitate the thinning of the wheel hub 1. The wheel hub 1 has a permanent magnet 13, which is located in the accommodating space S. The permanent magnet 13 can be combined with the inner wall of the ring wall 12. In addition, the material of the ring wall 12 can be magnetic stainless steel, so that the wheel hub 1 can rotate as a rotor.

[0064] The annular wall 12 may have an extension portion 14, which is formed by the annular wall 12 extending radially outward. Specifically, the extension portion 14 may be adjacent to the axial end surface 121 of the annular wall 12, and the extension portion 14 has a radial end surface 14a. The extension portion 14 has an upper end edge 141 and a lower end edge 142, and the radial end surface 14a is located between the upper end edge 141 and the lower end edge 142. In this embodiment, the lower end edge 142 may be connected to the axial end surface 121 of the annular wall 12.

[0065] The hub 1 also has a connecting portion 15, which can be combined with the ring wall 12 by injection molding. For example, the connecting portion 15 can be combined with the multiple through holes H after injection molding. The connecting portion 15 is used for connecting the multiple blades 2. It is worth noting that the connecting portion 15 has an axial bottom surface 151, which can be connected to the ring wall 12, and the axial bottom surface 151 is not connected to the axial end surface 121 of the ring wall 12, so that the axial bottom surface 151 of the connecting portion 15 and the axial end surface 121 of the ring wall 12 form a step difference. In this embodiment, the axial bottom surface 151 is directly connected to the extension portion 14 of the ring wall 12, and the axial bottom surface 151 can be connected to the radial end surface 14a of the extension portion 14, or the axial bottom surface 151 can be connected to the upper end edge 141 of the extension portion 14. Preferably, an axial distance T1 from the axial bottom surface 151 to the lower edge 142 is less than or equal to an axial distance T2 from the upper edge 141 to the lower edge 142 of the extension portion 14, and the axial distance T1 is greater than or equal to half of the axial distance T2. In this way, the extension portion 14 can provide a larger bonding area between the connecting portion 15 and the annular wall 12, so that the connecting portion 15 has better bonding stability when it is ejected to cover the annular wall 12.

[0066] Please refer to Figure 3 As shown, the plurality of blades 2 are arranged around the hub 1, and the overall height of the plurality of blades 2 preferably does not exceed the top surface of the hub 1, so as to reduce the overall axial height of the impeller P, so as to facilitate the thinning of the impeller P. One end of each blade 2 can be connected to the connecting portion 15. For example, the plurality of blades 2 can be integrally formed with the connecting portion 15, or the plurality of blades 2 can be made of metal, and the connecting portion 15 can cover one end of each blade 2 during injection molding. In this way, the impeller P can be arranged in a fan frame 31 of a cooling fan 3, and the fan frame 31 can have a base 31a and an upper cover 31b. The base 31a has a shaft tube 32. The fan frame 31 also has a stator 33 arranged on the outer periphery of the shaft tube 32. The impeller P can be rotatably arranged on the shaft tube 32 so that the stator 33 is located in the accommodating space S, thereby driving the impeller P to rotate through the stator 33.

[0067] Please refer to Figure 6 As shown, during the manufacturing process of the impeller P, when the connecting portion 15 is combined with the annular wall 12 of the hub 1 by injection molding, the axial bottom surface 151 of the connecting portion 15 is not directly connected to the axial end surface 121 of the annular wall 12, that is, the axial bottom surface 151 is connected to the extension portion 14 of the annular wall 12. Therefore, after the hub 1 is placed in the mold, the mold is radially pressed against the radial end surface 14a of the extension portion 14 to allow injection molding of the connecting portion 15, which can reduce the risk of the mold axially impacting the axial end surface 121 of the annular wall 12.

[0068] Please refer to Figure 7 , Figure 8 As shown, it is the second embodiment of the impeller P of the utility model. This embodiment is substantially the same as the first embodiment described above. In this embodiment, the axial bottom surface 151 of the connecting portion 15 has a notch 152, and the notch 152 can surround the extension portion 14. The notch 152 is adjacent to the extension portion 14, so that there is a gap between the radial end surface 14a of the extension portion 14 and the connecting portion 15. In this way, when the hub 1 is placed in a mold, the mold is radially against the radial end surface 14a, so that the notch 152 can be formed after the connecting portion 15 is injection molded, thereby reducing the risk of the mold axially impacting the axial end surface 121 of the ring wall 12.

[0069] In summary, the impeller of the utility model is connected to the axial end face of the ring wall through the axial bottom face of the connecting portion. Therefore, when the connecting portion is injection molded, the mold does not need to abut against the axial end face of the ring wall, which can reduce the risk of the mold axially impacting the axial end face of the ring wall, avoid damage to the impeller and affect the rotation stability of the impeller, and achieve the effect of stable rotation of the impeller.

[0070] Although the present invention has been disclosed using the above preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art can make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and the technical scope protected by the present invention is still within the scope of the present invention. Therefore, the protection scope of the present invention should include all changes within the meaning and equivalent scope of the claims attached above. In addition, when the above multiple embodiments can be combined, the present invention includes any combination of implementations.

Claims

1. A fan wheel, characterized in that: include: A hub, having an annular wall, the annular wall having an axial end surface, the annular wall extending radially outward to form an extension portion, the annular wall being combined with a connecting portion, the connecting portion having an axial bottom surface, the axial bottom surface being directly connected to the extension portion, so that the axial bottom surface and the axial end surface of the annular wall are not connected but have a step difference; and A plurality of fan blades are connected to the connection portion so as to be arranged around the hub.

2. The impeller according to claim 1, characterized in that: The wheel hub has a plate body, one end of the ring wall is connected to the periphery of the plate body, the geometric center of the plate body has a rotating shaft, and the rotating shaft and the plate body are laser welded together.

3. The impeller according to claim 1, characterized in that: The axial height of the annular wall is less than or equal to 10 mm.

4. The impeller according to claim 1, characterized in that: The extension portion has an upper end edge and a lower end edge, a radial end surface is formed between the upper end edge and the lower end edge, and the axial bottom surface of the connecting portion is connected to the radial end surface.

5. The impeller according to claim 4, characterized in that: The axial bottom surface of the connecting portion is connected to the upper end edge.

6. The impeller according to claim 4, characterized in that: An axial distance from the axial bottom surface of the connecting portion to the lower end edge of the extending portion is less than or equal to an axial distance from the upper end edge to the lower end edge of the extending portion.

7. The impeller according to claim 6, characterized in that: An axial distance from the axial bottom surface of the connecting portion to the lower end edge of the extending portion is greater than or equal to half of an axial distance from the upper end edge to the lower end edge of the extending portion.

8. The impeller according to claim 1, characterized in that: The axial bottom surface of the connecting portion has a notch, and the notch surrounds and is adjacent to the extending portion.

9. A cooling fan, characterized in that: include: a fan frame having an axle tube; a stator located at the outer periphery of the shaft tube; And the impeller as described in any one of claims 1 to 8, the impeller is rotatably mounted on the shaft tube.

Images