Axial-flow fan blade and fan equipment

Abstract

The axial flow fan blade comprises a hub, the hub comprises a cover body and a shaft body, the cover body is provided with a groove with a notch facing the air outlet side, the shaft body penetrates through the cover body and comprises an inner shaft section located in the groove, a plurality of first reinforcing ribs are arranged on the peripheral side of the inner shaft section, and a plurality of second reinforcing ribs are arranged on the peripheral side of the inner shaft section. A plurality of second reinforcing ribs are arranged on the circumferential groove wall of the groove; the multiple first reinforcing ribs are connected with the multiple second reinforcing ribs respectively, the first reinforcing ribs and the second reinforcing ribs extend in the axial direction of the shaft body, and the second reinforcing ribs extend to a groove opening of the groove. The position, used for being assembled with the motor shaft, of the axial flow fan blade is high in structural strength and good in rigidity, the situation that the fan blade is prone to shaking and deforming in the rotating process is avoided, and then the problem that the fan blade is large in operation noise is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blades, in particular to an axial flow fan blade and a fan device. Background Art

[0002] The fan blades of an air conditioner's outdoor unit primarily generate airflow to cool and dissipate the high-temperature, high-pressure exhaust from the indoor unit. Therefore, the fan's performance directly impacts the overall user experience of the air conditioner. However, in related technologies, the location where the fan blades attach to the motor shaft suffers from low structural strength and rigidity. This makes the blades prone to shaking and deformation during rotation, resulting in loud operating noise. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes an axial flow fan blade, which has high structural strength and good rigidity at the position where it is assembled with the motor shaft, thereby avoiding the situation where the fan blade is easily shaken and deformed during rotation, and thus avoiding the problem of loud noise during operation of the fan blade.

[0005] The embodiment of the present invention further provides a fan device including the above-mentioned axial flow fan blade.

[0006] The axial flow fan blade of the embodiment of the utility model includes a hub, the hub includes a cover body and a shaft body, the cover body is provided with a groove with a notch facing the air outlet side, the shaft body passes through the cover body and includes an inner shaft segment located in the groove, the outer circumference of the inner shaft segment is provided with a plurality of first reinforcing ribs, and the circumferential groove wall of the groove is provided with a plurality of second reinforcing ribs;

[0007] The plurality of first reinforcing ribs are respectively connected to the plurality of second reinforcing ribs. The first reinforcing ribs and the second reinforcing ribs both extend along the axial direction of the shaft, and the second reinforcing ribs extend to the notch of the groove.

[0008] In some embodiments, a plurality of third reinforcing ribs are provided in the groove, each of the third reinforcing ribs is provided at the bottom of the groove and extends radially along the cover body, and the plurality of third reinforcing ribs are connected one-to-one between the plurality of first reinforcing ribs and the plurality of second reinforcing ribs.

[0009] In some embodiments, the cross-section of the inner shaft segment is a first polygon, the number of sides of the first polygon is the same as the number of the first reinforcement ribs, and the first reinforcement ribs are respectively extended along multiple edges of the inner shaft segment.

[0010] In some embodiments, the shaft body includes an outer shaft segment located outside the cover body, and a plurality of fourth reinforcing ribs are provided on the outer peripheral side of the outer shaft segment. The plurality of fourth reinforcing ribs are arranged at intervals along the outer peripheral segment and are all connected to the cover body.

[0011] In some embodiments, the cross-section of the outer shaft segment is a second polygon, the number of sides of the second polygon is the same as the number of the plurality of fourth reinforcing ribs, and the plurality of fourth reinforcing ribs are respectively extended and arranged along a plurality of edges of the outer shaft segment.

[0012] In some embodiments, the shaft body is provided with an inner hole for inserting the motor shaft, the diameter of the inner hole is D1, the diameter of the motor shaft is D2, the second polygon is a hexagon, and the side length of the hexagon is d;

[0013] 1.2≤D1 / D2≤1.4, and / or, 1.9≤d / D2≤2.1.

[0014] In some embodiments, the fourth reinforcing rib is a trapezoid, which includes an upper base and a lower base arranged relative to each other in the axial direction of the shaft body, the upper base is shorter than the lower base, the upper base is flush with the end of the outer shaft segment, and the lower base is connected to the cover body.

[0015] In some embodiments, the length dimension of the upper base is a, the length dimension of the lower base is b, and 1.8≤b / a≤2.2.

[0016] In some embodiments, the length dimension a is 3 mm to 5 mm.

[0017] In some embodiments, a transition connection portion is provided at the connection between the fourth reinforcing rib and the cover body, and the width of the transition connection portion is greater than the width of the fourth reinforcing rib.

[0018] In some embodiments, the shaft body is provided with an inner hole for inserting the motor shaft, and the inner hole is provided with a cut surface, and the cut surface is used to cooperate with the motor shaft to prevent rotation.

[0019] The fan device of the embodiment of the present invention includes the axial flow fan blades as described in any of the above embodiments.

[0020] Beneficial effects: The axial flow fan blades and fan equipment of the embodiments of the utility model have high structural strength and good rigidity at the position where the axial flow fan blades are assembled with the motor shaft, which avoids the situation where the fan blades are easily shaken and deformed during rotation, thereby avoiding the problem of loud noise during operation of the fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view schematic diagram of the overall structure of the axial flow fan blade of an embodiment of the present utility model.

[0022] Figure 2 It is a three-dimensional schematic diagram of the air outlet side of the axial flow fan blade according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 4 It is a three-dimensional schematic diagram of the air inlet side of the axial flow fan blade according to an embodiment of the present invention.

[0025] Figure 5 yes Figure 4 Schematic diagram of the layout of the middle and outer shaft sections and the fourth reinforcement rib.

[0026] Reference numerals:

[0027] 1-hub; 11-cover; 111-groove; 12-shaft; 121-inner shaft segment; 122-outer shaft segment; 123-inner hole; 124-section; 13-first reinforcing rib; 14-second reinforcing rib; 15-third reinforcing rib; 16-fourth reinforcing rib; 161-upper bottom; 162-lower bottom; 17-transition connection portion;

[0028] 2-Leafs. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figure 1 As shown, the axial flow fan blade of the embodiment of the present invention includes a hub 1 and a plurality of blades 2, wherein the blades 2 can be specifically provided with three. The three blades 2 can be integrally formed on the outer peripheral side of the hub 1 and arranged at equal intervals along the circumference of the hub 1.

[0031] The hub 1 includes a cover 11 and a shaft 12, wherein the cover 11 can be a cap-shaped structure. The cover 11 is provided with a groove 111 with a notch facing the air outlet side, for example, Figure 2 As shown, the groove 111 is the space inside the cover body 11. The air inlet side of the axial flow fan blade when in use can be the upper side of the cover body 11, and the air outlet side of the axial flow fan blade can be the lower side of the cover body 11. The upper side of the cover body 11 can be closed, and the lower side of the cover body 11 can be open, that is, the notch of the groove 111 in the cover body 11 can face downward.

[0032] The shaft body 12 passes through the cover body 11 and includes an inner shaft section 121 located in the groove 111 . A plurality of first reinforcing ribs 13 are provided on the outer circumference of the inner shaft section 121 , and a plurality of second reinforcing ribs 14 are provided on the circumferential groove wall of the groove 111 .

[0033] For example, the shaft body 12 can be a generally hollow cylindrical structure, and the shaft body 12 can be integrally formed with the wheel hub 1 by injection molding. The shaft body 12 generally extends in the up and down direction and can pass through the cover body 11. Figure 3 As shown, a portion of the shaft body 12 can be located within the aforementioned groove 111 and form an inner shaft segment 121. A plurality of first reinforcing ribs 13 can be integrally molded on the outer circumference of the inner shaft segment 121 through integral injection molding. The plurality of first reinforcing ribs 13 can be evenly spaced along the circumference of the inner shaft segment 121. A plurality of second reinforcing ribs 14 can also be integrally molded on the circumferential inner groove wall of the groove 111 through integral injection molding. The plurality of second reinforcing ribs 14 can be evenly spaced along the circumference of the groove 111.

[0034] The plurality of first reinforcing ribs 13 are respectively connected to the plurality of second reinforcing ribs 14 . Both the first reinforcing ribs 13 and the second reinforcing ribs 14 extend along the axial direction of the shaft body 12 , and the second reinforcing ribs 14 extend to the notch of the groove 111 .

[0035] For example, the first reinforcing rib 13 and the second reinforcing rib 14 can both be sheet-like structures and can extend along the radial direction of the cover body 11 and be directly connected. The axial direction of the shaft body 12 can be the up and down direction. The first reinforcing rib 13 and the second reinforcing rib 14 can both extend along the up and down direction, wherein the lower end of the second reinforcing rib 14 can extend to the edge of the notch of the groove 111, that is, the lower end of each second reinforcing rib 14 is roughly flush with the bottom edge of the cover body 11.

[0036] In the axial flow fan blade of the embodiment of the present invention, the setting of the first reinforcing rib 13 and the second reinforcing rib 14 can connect and fix the inner shaft section 121 and the cover body 11, thereby enhancing the structural strength of the shaft body 12 and improving the rigidity, avoiding the situation where the shaft body 12 of the axial flow fan blade is easily shaken and deformed during the rotation process, and thus improving the operation noise problem of the fan blade.

[0037] Secondly, the design of the second reinforcing rib 14 extending to the edge of the cover body 11 can make the second reinforcing rib 14 have a larger structural size, thereby fully enhancing the structural strength and further ensuring the limiting and restraining effect on the shaft body 12.

[0038] In some embodiments, a plurality of third reinforcing ribs 15 are provided in the groove 111, each third reinforcing rib 15 is provided at the bottom of the groove 111 and extends radially along the cover body 11, and the plurality of third reinforcing ribs 15 are connected one-to-one between the plurality of first reinforcing ribs 13 and the plurality of second reinforcing ribs 14.

[0039] For example, Figure 3As shown, a plurality of third reinforcing ribs 15 can be integrally molded on the bottom of the groove 111 through integral injection molding. These ribs 15 can be disposed on the outer circumference of the inner shaft segment 121 and arranged at equal intervals along the circumference of the inner shaft segment 121. Each third reinforcing rib 15 can extend radially along the housing 11. The inner end of each third reinforcing rib 15 can be connected to the corresponding first reinforcing rib 13, and the outer end of each third reinforcing rib 15 can be connected to the corresponding second reinforcing rib 14. This ensures a secure connection between the first and second reinforcing ribs 13, 14, and the support provided by the third reinforcing ribs 15 can also effectively limit the shaking and deformation of the shaft body 12.

[0040] In some embodiments, the cross section of the inner shaft segment 121 is a first polygon, the number of sides of the first polygon is the same as the number of the plurality of first reinforcing ribs 13 , and the plurality of first reinforcing ribs 13 are respectively extended and arranged along the plurality of edges of the inner shaft segment 121 .

[0041] For example, Figure 3 As shown, the cross section of the inner shaft segment 121 is a cross section perpendicular to the axial direction of the inner shaft segment 121. The first polygon can be a regular polygon, specifically a hexagon, an octagon, a decagon, etc. For example, the first polygon can be an octagon. At this time, eight first reinforcing ribs 13 can also be provided. The eight first reinforcing ribs 13 can all be provided at the eight edges of the inner shaft segment 121 and extended along the extension direction of the edges.

[0042] The ridges on the outer peripheral side of the inner shaft section 121 facilitate the lead-out arrangement of the first reinforcing rib 13, and are also beneficial for reducing the distance between the first reinforcing rib 13 and the corresponding second reinforcing rib 14, thereby further enhancing the overall structural strength formed by the first reinforcing rib 13 and the second reinforcing rib 14.

[0043] In some embodiments, the shaft body 12 includes an outer shaft section 122 located outside the cover body 11 , and a plurality of fourth reinforcing ribs 16 are provided on the outer periphery of the outer shaft section 122 . The plurality of fourth reinforcing ribs 16 are arranged at intervals along the outer periphery and are all connected to the cover body 11 .

[0044] For example, Figure 4 As shown, the shaft body 12 can pass through the cover body 11 in the up and down directions, the outer shaft section 122 is the part of the shaft body 12 located on the upper side of the cover body 11, and multiple fourth reinforcing ribs 16 can be molded on the outer peripheral side of the outer shaft section 122 by integral injection molding. Multiple fourth reinforcing ribs 16 can be arranged at equal intervals along the circumference of the outer shaft section 122, and the bottom side of each fourth reinforcing rib 16 is connected to the top surface of the cover body 11 facing the air inlet side.

[0045] Therefore, by setting the inner shaft segment 121 and the outer shaft segment 122, the overall length dimension of the assembly with the motor shaft can be increased, thereby improving the overall assembly accuracy. Secondly, the fourth reinforcing rib 16 can be set to enhance the structural strength and rigidity of the outer shaft segment 122, further avoiding the situation where the shaft body 12 is easily deformed and shaken.

[0046] In some embodiments, the cross section of the outer shaft segment 122 is a second polygon, the number of sides of the second polygon is the same as the number of the fourth reinforcing ribs 16 , and the fourth reinforcing ribs 16 are respectively extended along the edges of the outer shaft segment 122 .

[0047] For example, Figure 5 As shown, the cross section of the outer shaft segment 122 can be considered as a cross section perpendicular to the axial direction of the outer shaft segment 122. The second polygon can be a regular polygon, specifically a hexagon, a heptagon, an octagon, etc. For example, when the second polygon is a hexagon, six fourth reinforcing ribs 16 can be provided. The six fourth reinforcing ribs 16 can be provided at the six edges of the outer shaft segment 122 and extend along the extending direction of the edges.

[0048] In some embodiments, as Figure 5 As shown, an inner hole 123 for inserting the motor shaft is provided in the shaft body 12. The inner hole 123 can be generally a circular hole and passes through the shaft body 12 along the axial direction of the shaft body 12. The diameter of the inner hole 123 is D1, and the diameter of the motor shaft is D2 (not shown). The second polygon is a hexagon, and the side length of the hexagon is d.

[0049] The diameter D1 and the diameter D2 satisfy the following formula: 1.2≤D1 / D2≤1.4, that is, the ratio of D1 to D2 can be 1.2, 1.25, 1.3, 1.35, 1.4, etc.

[0050] The above-mentioned side length d and diameter D2 satisfy the following formula: 1.9≤d / D2≤2.1, that is, the ratio of d to D2 can be 1.9, 1.95, 2, 2.1, etc.

[0051] In some embodiments, as Figure 5 As shown, the fourth reinforcing rib 16 is a trapezoid, specifically a right-angled trapezoid, and the trapezoid includes an upper base 161 and a lower base 162 arranged relatively in the axial direction of the shaft body 12, the upper base 161 is shorter than the lower base 162, and the upper base 161 is flush with the end of the outer shaft segment 122, that is, the upper base 161 and the upper end surface of the outer shaft segment 122 are arranged coplanarly, and the lower base 162 is connected to the cover body 11.

[0052] Therefore, on the one hand, the structural strength of the support and limit of the outer shaft segment 122 can be fully guaranteed. On the other hand, the flush design of the upper base 161 and the end of the outer shaft segment 122 can make the ends of the upper base 161 and the outer shaft segment 122 fit and abut against the matching structure on the motor shaft at the same time, so that the assembly of the motor shaft and the shaft body 12 can have better flatness and coaxiality, ensuring the overall installation and matching accuracy, and further avoiding abnormal noise and vibration caused by matching problems during operation.

[0053] In some embodiments, as Figure 5 As shown, the length of the upper base 161 is a, the length of the lower base 162 is b, and 1.8≤b / a≤2.2. For example, the ratio of b to a can be 1.8, 1.9, 2.0, 2.1, 2.2, etc.

[0054] In some embodiments, the length dimension a is 3 mm to 5 mm. For example, the length dimension a can be 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc.

[0055] In some embodiments, a transition portion 17 is provided at the connection between the fourth reinforcing rib 16 and the cover body 11, and the width of the transition portion 17 is greater than the width of the fourth reinforcing rib 16. Figure 5 As shown, the transition connection portion 17 can be formed between the lower bottom 162 of the fourth reinforcement rib 16 and the upper end surface of the cover body 11 by integral injection molding. The transition connection portion 17 can be rectangular as a whole and laid flat on the upper end surface of the cover body 11. The overall outer peripheral contour of the transition connection portion 17 is larger than the outer peripheral contour of the lower bottom 162 of the fourth reinforcement rib 16, thereby fully ensuring the structural strength of the connection between the fourth reinforcement rib 16 and the cover body 11.

[0056] In some embodiments, as Figure 5 As shown, shaft body 12 includes an inner hole 123 for inserting the motor shaft. A cut surface 124 is provided within inner hole 123. Cut surface 124 is configured to engage with the motor shaft for rotation prevention. Specifically, the motor shaft may also include a planar feature that mates with cut surface 124. This ensures the precise fit between the motor shaft and the fan blades, preventing circumferential slippage of the motor shaft and limiting the amplitude of potential vibrations generated by the fan blades.

[0057] The following describes the fan equipment according to the embodiment of the present invention.

[0058] The fan device of the embodiment of the present invention includes an axial flow fan blade, which can be the axial flow fan blade described in any of the above embodiments. The fan device can be an air conditioner outdoor unit, or can also be a wind wheel device such as an industrial fan or an electric fan.

[0059] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. An axial flow fan blade, characterized in that: The wheel hub (1) comprises a cover (11) and a shaft (12); the cover (11) is provided with a groove (111) with a notch facing the air outlet side; the shaft (12) passes through the cover (11) and comprises an inner shaft section (121) located in the groove (111); a plurality of first reinforcing ribs (13) are provided on the outer circumference of the inner shaft section (121); and a plurality of second reinforcing ribs (14) are provided on the circumferential groove wall of the groove (111); The plurality of first reinforcing ribs (13) are respectively connected to the plurality of second reinforcing ribs (14); the first reinforcing ribs (13) and the second reinforcing ribs (14) both extend along the axial direction of the shaft body (12); and the second reinforcing ribs (14) extend to the notch of the groove (111).

2. The axial flow fan blade according to claim 1, characterized in that: A plurality of third reinforcing ribs (15) are provided in the groove (111), each of the third reinforcing ribs (15) is provided at the bottom of the groove (111) and extends along the radial direction of the cover body (11), and the plurality of third reinforcing ribs (15) are connected between the plurality of first reinforcing ribs (13) and the plurality of second reinforcing ribs (14) in a one-to-one correspondence.

3. The axial flow fan blade according to claim 1, characterized in that: The cross section of the inner shaft section (121) is a first polygon, the number of sides of the first polygon is the same as the number of the first reinforcement ribs (13), and the first reinforcement ribs (13) are respectively extended and arranged along the multiple edges of the inner shaft section (121).

4. The axial flow fan blade according to claim 1, characterized in that: The shaft body (12) includes an outer shaft section (122) located outside the cover body (11), and a plurality of fourth reinforcing ribs (16) are provided on the outer peripheral side of the outer shaft section (122). The plurality of fourth reinforcing ribs (16) are arranged at intervals along the outer shaft section and are all connected to the cover body (11).

5. The axial flow fan blade according to claim 4, characterized in that: The cross section of the outer shaft section (122) is a second polygon, the number of sides of the second polygon is the same as the number of the plurality of fourth reinforcing ribs (16), and the plurality of fourth reinforcing ribs (16) are respectively extended and arranged along the plurality of edges of the outer shaft section (122).

6. The axial flow fan blade according to claim 5, characterized in that: An inner hole (123) for inserting the motor shaft is provided in the shaft body (12), the inner hole (123) has a diameter of D1, the diameter of the motor shaft is D2, the second polygon is a hexagon, the side length of the hexagon is d, 1.2≤D1 / D2≤1.4, and / or, 1.9≤d / D2≤2.

1.

7. The axial flow fan blade according to claim 4, characterized in that: The fourth reinforcing rib (16) is trapezoidal, comprising an upper base (161) and a lower base (162) arranged relative to each other in the axial direction of the shaft body (12), the upper base (161) being shorter than the lower base (162), the upper base (161) being flush with the end of the outer shaft section (122), and the lower base (162) being connected to the cover body (11).

8. The axial flow fan blade according to claim 7, characterized in that: The length dimension of the upper base (161) is a, the length dimension of the lower base (162) is b, and 1.8≤b / a≤2.

2.

9. The axial flow fan blade according to claim 8, characterized in that: The length dimension a is 3 mm to 5 mm.

10. The axial flow fan blade according to claim 4, characterized in that: A transition connection portion (17) is provided at the connection between the fourth reinforcing rib (16) and the cover body (11), and the width of the transition connection portion (17) is greater than the width of the fourth reinforcing rib (16).

11. The axial flow fan blade according to claim 1, characterized in that: An inner hole (123) for inserting the motor shaft is provided in the shaft body (12), and a cut surface (124) is provided in the inner hole (123). The cut surface (124) is used for anti-rotation cooperation with the motor shaft.

12. A fan device, characterized in that: The invention comprises an axial flow fan blade as claimed in any one of claims 1 to 11.

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