Fan blade and fan assembly

Abstract

The utility model provides a fan blade and a fan assembly. The fan blade comprises a hub, the hub is provided with a first end and a second end which are opposite in the axial direction, an end plate used for installing a motor rotor is arranged at the first end, a first wall and a peripheral part are arranged around the end plate, and the first wall is connected between the end plate and the peripheral part in a manner of forming an angle with the axial direction; and a plurality of blades extending outward in a radial direction from the outer peripheral portion; a first preset angle is formed between the first wall and the axial direction, and the first preset angle is set to range from 5 degrees to 45 degrees; a guide rib is arranged on the side, facing the second end, of the hub face in a protruding mode, and the guide rib is at least partially curved. The fan blade and the fan assembly have the advantages of being simple, reliable, easy to implement, convenient to use and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ventilation equipment structures. More specifically, the present application relates to a fan blade intended to better expel foreign matter. The present application also relates to a fan assembly comprising the aforementioned fan blade. BACKGROUND

[0002] Vehicles generally comprise one or more ventilation equipment, such as a fan. The fan generally comprises a fan blade and an electric motor, and the fan blade is driven by the electric motor. In some operating conditions, foreign matter, such as sand or water, can enter the gap between the fan blade and the electric motor, and can accumulate at the hub of the fan blade. Such unwanted accumulation of foreign matter can lead to a non-uniform mass distribution, or cause the mass of the fan blade to increase, thereby causing abnormal situations such as chattering, wear or difficulty in starting. When the fan is in operation, the foreign matter can be located between the hub of the fan blade and the rotor of the electric motor, and tends to accumulate at the radially outer part of the hub under the effect of centrifugal force. SUMMARY

[0003] It is an object of an aspect of the present application to provide a fan blade that can effectively expel foreign matter, such as sand or water. It is an object of another aspect of the present application to provide a fan assembly comprising the aforementioned fan blade.

[0004] The object of the present application is achieved by the technical solutions presented below.

[0005] A fan blade comprising:

[0006] a hub having a first end and a second end opposite in an axial direction, an end plate provided at the first end for mounting a rotor of an electric motor, a first wall and an outer periphery provided around the end plate, the first wall being connected between the end plate and the outer periphery at an angle to the axial direction, and a plurality of blades extending outwardly in a radial direction from the outer periphery; and

[0007] wherein the first wall forms a first predetermined angle with the axial direction, the first predetermined angle being set to be between 5 degrees and 45 degrees; and

[0008] wherein a guide rib is provided protruding at a side of the hub facing the second end, the guide rib being at least partially configured to be curved.

[0009] In the aforementioned fan blade, optionally, each guide rib comprises a first section and a second section, the first section extending along the radial direction, and the second section extending along an arc deviating from the radial direction, the first section and the second section being configured to be continuous.

[0010] In the aforementioned fan blade, optionally, the first section extends from the end plate toward the first wall, and the second section is arranged on the end plate.

[0011] In the above-mentioned fan blade, optionally, the guide ribs are arranged adjacent to each other, and a gap is formed between adjacent guide ribs, and the through hole on the motor rotor is oriented to at least partially face the gap so that the foreign matter passes through the through hole into the gap, and then moves along the gap towards the first wall, and is discharged along the first wall.

[0012] In the above-mentioned fan blade, optionally, the gap is sized to gradually increase from the end plate towards the first wall, and forms a horn shape opening towards the first wall.

[0013] In the above-mentioned fan blade, optionally, a second wall is included, the second wall is disposed between the end plate and the first wall, and extends radially outwardly at an angle to the axial direction towards the second end;

[0014] wherein a second predetermined angle is formed between the second wall and the axial direction.

[0015] In the above-mentioned fan blade, optionally, the second predetermined angle is set to be between 5 degrees and 70 degrees.

[0016] In the above-mentioned fan blade, optionally, a transition surface is included, the transition surface is disposed between the first wall and the second wall at the end plate;

[0017] wherein the guide ribs extend from the end plate, through the second wall, and reach the edge of the transition surface; and

[0018] wherein in the axial direction, the top of the guide ribs is configured to be flush with the transition surface.

[0019] In the above-mentioned fan blade, optionally, the transition surface, the first wall and / or the second wall are respectively composed of a plurality of planes or curved surfaces;

[0020] wherein the plurality of planes or curved surfaces that compose the first wall and / or the second wall have different slopes or angles; and

[0021] wherein the transition surface is disposed parallel to the end plate, or a third predetermined angle is formed between the transition surface and the end plate.

[0022] In the above-mentioned fan blade, optionally, the fan blade is integrally molded, and is manufactured by an injection molding process.

[0023] A fan assembly, comprising:

[0024] the above-mentioned fan blade;

[0025] a motor including a rotor and a stator, wherein the end plate of the fan blade is attached to the rotor; and

[0026] a frame, the stator of the motor is attached to the frame, and the frame is arranged around the distal end of the blade.

[0027] In the above fan assembly, optionally, the rotor includes one or more through-holes, and an opening of the through-hole is positioned adjacent to the guide rib.

[0028] wherein the through-hole includes an upstream side and a downstream side, the upstream side is located upstream of the downstream side in a rotation direction of the motor in the circumferential direction, and the guide rib is positioned close to the upstream side. BRIEF DESCRIPTION OF DRAWINGS

[0029] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that these drawings are for illustrative purposes only and are not a limitation on the scope of the present application. In addition, unless specifically stated otherwise, the drawings are conceptual in nature and are intended to be approximately representative of the objects described. The drawings are also not necessarily drawn to scale.

[0030] Figure 1 is a perspective view of one embodiment of a fan blade of the present application.

[0031] Figure 2 is a perspective view of Figure 1 another embodiment of the embodiment shown.

[0032] Figure 3 is a perspective view of Figure 2 a partial enlarged front view of the hub portion.

[0033] Figure 4 is a cross-sectional view of the hub of the embodiment shown. Figure 1

[0034] Figure 5 is an exploded view of one embodiment of a fan assembly of the present application.

[0035] Figure 6 is a perspective view of Figure 5 the motor in the embodiment shown. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative, exemplary, and should not be construed as limiting the scope of protection of the present application.

[0037] First, it should be noted that the orientation terms such as top, bottom, upward, downward, etc. mentioned herein are defined with respect to the direction in each drawing. These orientations are relative concepts and thus will vary depending on the position and state in which they are placed. Therefore, these or other orientation terms should not be construed as limiting.

[0038] ​It should also be noted that any individual technical feature described or implied in the embodiments herein or shown or implied in the drawings can continue to be combined with any other individual technical feature described or implied in the embodiments herein or shown or implied in the drawings, to obtain further embodiments not directly mentioned herein.

[0039] It should be noted that like reference numerals refer to like or similar parts throughout the several views of the drawings.

[0040] Figures 1 to 4 Various aspects of one embodiment of a fan blade 10 of the present application are shown. In one embodiment, the fan blade 10 can include a hub 100, a blade 200, a ring 300, etc. The hub 100 can be configured to rotate about an axial direction A-A, the blade 200 can be configured to extend in a radial direction R-R, and the ring 300 can be configured to extend along a circumferential direction C-C.

[0041] As used herein, the axial direction A-A refers to the direction in which the rotational axis of the fan blade of the fan assembly lies. The radial direction R-R refers to the direction in which the radius of the circular profile of the fan blade 10 points, or in other words, the direction in which a ray in a plane perpendicular to the axial direction A-A and emanating from a point in the axial direction A-A points. The circumferential direction C-C refers to the direction in which the circumference of the circular profile of the fan blade 10 lies. Furthermore, as used herein, radially outward or radially inward refers to the direction generally along the radial direction R-R away from or towards the rotational axis of the fan blade 10. Furthermore, as used herein, the fan blade 10 can have a rotational direction, e.g. clockwise or counter-clockwise. With reference to Figure 3 As shown, the fan blade 10 can rotate in a counter-clockwise direction in the perspective of the figure, and the direction of rotation can indicate an upstream side and a downstream side. For example, when the fan blade 10 rotates counter-clockwise, portions of the fan blade 10 can first pass the upstream side and then the downstream side. Figure 3

[0042] ​The hub 100 can include a first end 101 and a second end 102, and can be rotatable about an axis of rotation in an axial direction A-A. In one embodiment, the hub 100 can include at least an end plate 110, a first wall 121, and a plurality of guide ribs 140. In one embodiment, the hub 100 can include the end plate 110, the first wall 121, a second wall 122, a transition face 139, and the plurality of guide ribs 140. The end plate 110 can be positioned at the first end 101, the first wall 121 can extend radially outward from an entire periphery of the end plate 110, and the first wall 121 can extend at an angle to the axial direction A-A toward the second end 102. In one embodiment, the second wall 122 can be positioned between the first wall 121 and the end plate 110. In one embodiment, the transition face 130 can be positioned between the first wall 121 and the second wall 122. The second wall 122 can extend radially outward at an angle to the axial direction A-A toward the second end 102.

[0043] The end plate 110 can have a generally planar plate profile, and can have a side facing the first end 101 and another side facing the second end 102. In one embodiment, the end plate 110 can have a generally circular outer profile. The end plate 110 can be generally perpendicular to the axial direction A-A.

[0044] The first wall 121 and / or the second wall 122 can be annular bevels. A first predetermined angle Al can be formed between the first wall 121 and the axial direction A-A, and the first predetermined angle Al can be set to be between 5 degrees and 45 degrees. For example, the first predetermined angle Al can be 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, or 45 degrees. A second predetermined angle A2 can be formed between the second wall 122 and the axial direction A-A. The second predetermined angle A2 can be set to be less than, greater than, or equal to the first predetermined angle Al, and can be between 5 degrees and 70 degrees. For example, the second predetermined angle A2 can be 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, or 70 degrees.

[0045] Further, an outer circumferential surface of the first wall 121 can further extend along the axial direction A-A toward the first end 101 to form an outer ring portion 123. It will be readily understood that the outer ring portion 123 is an optional structure, and in some embodiments, the outer ring portion 123 can be absent. A plurality of first reinforcing ribs 124 can be arranged on a side of the first wall 121 facing the second end 102, and the plurality of first reinforcing ribs 124 can be generally uniformly arranged in a circumferential direction C-C. In one embodiment, a plurality of second reinforcing ribs 125 can also be arranged between the outer ring portion 123 and the first wall 121, and the plurality of second reinforcing ribs 125 can be generally uniformly arranged in the circumferential direction C-C.

[0046] The transition surface 130 can be located between the first wall 121 and the second wall 122, and can be substantially parallel to the end plate 110. In other words, the transition surface 130 can be substantially perpendicular to the axial direction A-A. In one embodiment, the transition surface 130 can form a third predetermined angle with the end plate 110.

[0047] In one embodiment, the transition surface 130, the first wall 121 and / or the second wall 122 are respectively composed of a plurality of planes or curved surfaces. For example, the first wall 121 and / or the second wall 122 can be composed of a plurality of planes or curved surfaces with different slopes or angles. In other words, the transition surface 130, the first wall 121 and / or the second wall 122 can be formed by a series of smaller planes or curved surfaces. Such a configuration facilitates the manufacturing and forming process of the transition surface 130, the first wall 121 and / or the second wall 122. A plurality of guide ribs 140 can be provided at a side of the end plate 110 facing the second end 102. In one embodiment, the guide ribs 140 can at least partially be located on the end plate 110 and protrude in the axial direction A-A with respect to the surface of the end plate 110. In one embodiment, the portion of the guide ribs 140 located on the end plate 110 is at least partially configured to be curved.

[0048] The guide ribs 140 can respectively comprise at least a first section 141 and a second section 142. The first section 141 can be located radially outward of the second section 142, for example, the first section 141 can extend from near the first wall 121 towards the end plate 110, for example, starting from the interface between the transition surface 130 and the second wall 122. The first section 141 can be configured to be substantially linear, for example, extending along the radial direction R-R. The second section 142 can be provided on the end plate 110, for example, can extend along an arc, and the arc can be deviated from the radial direction R-R. In one embodiment, the first section 141 and the second section 142 can be configured to be continuous.

[0049] A gap 143 can be formed between adjacent guide ribs 140. In one embodiment, the adjacent guide ribs 140 are completely spaced apart from each other. The gap 143 can gradually increase from the end plate 110 towards the first wall 121, and can form a horn shape opening towards the first wall 121. For example, the gap 143 can have an opening at the end plate 110, an opening towards the first wall 121. The opening of the gap 143 towards the first wall 121 can be greater than the opening of the gap 143 at the end plate 110.

[0050] As shown in FIG. 1, the guide ribs 140 can have a top portion 144 in the axial direction A-A, and the top portion 144 can be configured to be in the same plane as the transition surface 130, such that the top portion 144 and the transition surface 130 are configured to be substantially flush. Figure 4 As shown in FIG. 1, the guide ribs 140 can have a top portion 144 in the axial direction A-A, and the top portion 144 can be configured to be in the same plane as the transition surface 130, such that the top portion 144 and the transition surface 130 are configured to be substantially flush.

[0051] The vane 200 can include a proximal end 201 and a distal end 202. In the illustrated embodiment, the proximal end 201 of the vane 200 extends from the perimeter of the hub 100, for example, from the second wall 122 in the radial direction R-R. In one embodiment, the proximal end 201 of the vane 200 can extend from the first wall 121 in the radial direction R-R. The distal end 202 of the vane 200 is connected to the ring 300.

[0052] The ring 300 can have a generally circular profile and can be attached to the distal end 202 of each vane 200. It is noted that the ring 300 is not required, but is optional. For example, the fan can include only the hub 100 and the vanes 200.

[0053] In one embodiment, each portion of the hub 100 can be integrally formed. In one embodiment, each portion of the fan 10 can be integrally formed. In one embodiment, the fan 10 can be integrally formed by an injection molding process.

[0054] Figures 5 to 6 An embodiment of the fan assembly 1 of the present application is shown. As shown, the fan 10, the motor 20, and the frame 30 are assembled together. The motor 20 can include a rotor 500 and a stator 600. The rotor 500 can include a plurality of through holes 510 and a plurality of first mounting holes 520 and can be mounted to the end plate 110 by first fasteners 700. The first fasteners 700 can be mounted within the first mounting holes 520. As shown, the rotor 500 can have a generally cylindrical shape. The rotor 500 can be attached to the hub 100 and there can be a gap between the outer peripheral side surface and the front surface of the rotor 500 and the hub 100. This gap is arranged for the need of installation and heat dissipation, and foreign substances can enter the space between the rotor 500 and the hub 100 through this gap. Similarly, the stator 600 can also include a plurality of second mounting holes 620 and can be mounted to the frame 30 by second fasteners 800. Thus, after being mounted in place, the rotor 500 and the fan 10 can pivot, for example, rotate about the axial direction A-A, with respect to the frame 30.

[0055] Further, the through holes 510 of the rotor 500 can be arranged adjacent to the guide ribs 140. The rotor 500 can be attached to the hub 100 by the first mounting holes 520 and thus define the location of the through holes 510. The through holes 510 can include an upstream side and a downstream side. In one embodiment, the upstream side can be the inner side surface of the curved rib or the guide rib. In one embodiment, the downstream side can be the outer side surface of the curved rib or the guide rib. Figure 3 In the illustrated perspective view, the fan 10 will rotate in the counterclockwise direction and thus, in the illustrated embodiment, the rotor 500 will rotate in the clockwise direction. Figure 3The right side of the through hole 510 as seen from the perspective of the view can be referred to as an upstream side, and the left side of the through hole 510 can be referred to as a downstream side. The guide ribs 140 can be positioned proximate to the upstream side. In other words, in the circumferential direction C-C, the upstream side is located upstream of the rotation direction of the motor relative to the downstream side. In one embodiment, the through hole 510 can be oriented to at least partially face the gap 143 between the guide ribs 140.

[0056] In this way, foreign matter can enter the space between the rotor 500 and the hub 100 through the through hole 510, for example, into the gap 143 between adjacent guide ribs 140. When the fan blade 10 is rotating, under the action of centrifugal force, air flow will flow radially outward from the direction close to the center of rotation along the gap 143, for example, along the gap 143. Such air flow will push the foreign matter along the gap 143 towards the first wall 121, eventually reaching the first wall 121, and further move along the first wall 121 towards the second end 102 of the hub 100 under the action of centrifugal force and air flow, and exit the fan blade 10 or be discharged at the second end 102. Therefore, foreign matter can be effectively discharged to the outside of the fan blade 10, and accumulation of foreign matter near the fan blade and the motor is avoided.

[0057] Therefore, after assembly is completed, the fan blade 10 is pivotally attached to the frame 30, and the frame 30 encircles the distal end 202 of the vane 200. In the illustrated embodiment, the frame 30 encircles the ring 300 of the fan blade 10.

[0058] The fan blade 10 and the fan assembly 1 of the present application can be used in a vehicle, for example, as an air intake fan or an exhaust fan. In one embodiment, the fan blade 10 and the fan assembly 1 of the present application can be used in a vehicle operating in a desert region or a humid region.

[0059] The fan blade and the fan assembly of the present application have the advantages of being simple and reliable, easy to implement, convenient to use, etc., and can provide improved foreign matter discharge capability. By employing the fan blade and the fan assembly of the present application, the service life of the fan assembly is prolonged, and the reliability is improved.

[0060] The present application is disclosed by this specification and also enables a person skilled in the art to carry out the present application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the technical solutions claimed, and includes other examples thought of by a person skilled in the art. As long as such other examples include structural elements not different from the literal language of the technical solutions claimed, or such other examples include equivalent structural elements not substantially different from the literal language of the technical solutions claimed, such other examples should be considered to be within the protection scope determined by the technical solutions claimed by the present application.

Claims

1. A fan blade, characterized in that, Comprising: a hub (100) having a first end (101) and a second end (102) opposite in an axial direction (A-A), an end plate (110) provided at the first end (101) for mounting a motor rotor (500), a first wall (121) and an outer periphery (123) provided around the end plate (110), the first wall (121) being connected between the end plate (110) and the outer periphery (123) at an angle to the axial direction (A-A); and a plurality of vanes (200) extending radially (R-R) outwardly from the outer periphery (123); wherein the first wall (121) forms a first predetermined angle (A1) with the axial direction (A-A), the first predetermined angle (A1) being arranged to be between 5 degrees and 45 degrees; and wherein a guide rib (140) is provided protruding at a side of the hub (100) facing the second end (102), the guide rib (140) being at least partially configured to be curved.

2. The leaf according to claim 1, characterized in that Each guide rib (140) comprises a first section (141) extending along a radial direction (R-R) and a second section (142) extending along an arc deviating from the radial direction (R-R), the first section (141) and the second section (142) being configured to be continuous.

3. The leaf according to claim 2, wherein The first section (141) extends from the end plate (110) towards the first wall (121), and the second section (142) is arranged on the end plate (110).

4. The leaf according to claim 2, wherein The guide ribs (140) are arranged adjacent to each other, and a gap (143) is formed between adjacent guide ribs (140), and a through hole (510) on the motor rotor (500) is oriented to at least partially face the gap (143) so that a foreign object enters the gap (143) through the through hole (510) and then moves along the gap (143) towards the first wall (121) and is discharged along the first wall (121).

5. The leaf according to claim 4, wherein The gap (143) is configured to gradually increase in size from the end plate (110) towards the first wall (121) and form a horn shape opening towards the first wall (121).

6. The leaf according to claim 1, wherein a second wall (122) provided between the end plate (110) and the first wall (121) and extending radially outwardly at an angle to the axial direction (A-A) towards the second end (102); wherein the second wall (122) forms a second predetermined angle (A2) with the axial direction (A-A).

7. The leaf according to claim 6, wherein The second predetermined angle (A2) is arranged to be between 5 degrees and 70 degrees.

8. The leaf according to claim 6, wherein a transition face (130) provided between the first wall (121) and the second wall (122) at the end plate; wherein the guide rib (140) extends from the end plate (110), through the second wall (122), and to an edge of the transition face (130); and wherein a top (144) of the guide rib (140) is configured to be flush with the transition face (130) in the axial direction (A-A).

9. The leaf according to claim 8, characterized in that The transition face (130), the first wall (121), and / or the second wall (122) are each composed of a plurality of planes or curved surfaces; wherein the plurality of planes or curved surfaces that compose the first wall (121) and / or the second wall (122) have different slopes or angles; and wherein the transition face (130) is configured to be parallel to the end plate (110), or a third predetermined angle is formed between the transition face (130) and the end plate (110).

10. The leaf according to any one of claims 1-9, characterized in that, The fan blade (10) is integrally molded and manufactured by an injection molding process.

11. A fan assembly characterized by, comprising: the fan blade (10) according to any one of claims 1-10; a motor (20) comprising a rotor (500) and a stator (600), wherein the end plate (110) of the fan blade (10) is attached to the rotor (500); and a frame (30) to which the stator (600) of the motor (20) is attached, and around which the distal end (202) of the blade (200) is arranged.

12. The fan assembly of claim 11, wherein, The rotor (500) comprises one or more through holes (510), and an opening of the through hole (510) is positioned adjacent to the guide rib (140); wherein the through hole (510) comprises an upstream side and a downstream side, the upstream side is located upstream of a rotation direction of the motor (20) relative to the downstream side in a circumferential direction (C-C), and the guide rib (140) is positioned close to the upstream side.

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