Fan blade and fan

Abstract

The invention discloses a fan blade and a fan, and relates to the technical field of electric appliances. The hub comprises a hub body and a connecting piece integrally formed with the hub body, the connecting piece is located at the center of the hub body, a first assembly hole is formed in the center of the connecting piece, and the connecting piece and the first assembly hole are both of a D-shaped structure. And the outer side of the connecting piece is provided with a stepped shape-following groove which is arranged around the connecting piece. Therefore, the D-shaped first assembly hole is directly formed in the fan blade through one-time injection molding, and on the basis that the assembly tolerance requirement is met, the production process is simplified, and the production cost is reduced. Moreover, the geometric structure of the connecting piece can be optimized by introducing the stepped shape follow-up groove in the outer side of the connecting piece, so that the cooling shrinkage caused by the structural thickness difference of the connecting piece is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrical appliances, and in particular to a fan blade and a fan. Background Art

[0002] The mating holes of the fan blades of the AC fan are usually designed to be D-shaped, so that they can be assembled with the D-axis of the AC motor that drives the fan to rotate, and play a role in stopping rotation and precise positioning. The current fan blades are usually made of polypropylene material or a mixture of polypropylene and glass fiber material by injection molding. However, due to the anisotropic shrinkage effect of semi-crystalline materials (the phenomenon that the shrinkage properties of the material are different in different directions), the roundness of the fan blade shaft hole meets the tolerance requirements for assembly with the D-axis of the AC motor.

[0003] In order to meet the tolerance requirements, a sleeve with a D-shaped hole structure is usually added to the shaft hole of the fan blade and fixed to the fan blade through secondary injection molding. Although this solution meets the assembly tolerance requirements, it also increases the production cost and process complexity of the fan blade. Summary of the invention

[0004] In order to solve the problem of high production cost and high process complexity due to the need for secondary injection molding to fix the fan blade shaft hole and bearing to meet the assembly tolerance requirements, the present invention is proposed to provide a fan blade and a fan that overcome the above problems or at least partially solve the above problems.

[0005] Based on the first aspect of the present invention, a wind blade is provided, which includes a hub body and a connecting piece integrally formed with the hub body, the connecting piece is located at the center of the hub body, and a first assembly hole is opened at the center of the connecting piece, wherein the connecting piece and the first assembly hole are both D-shaped structures, and a stepped conformal groove arranged around the connecting piece is opened on the outer side of the connecting piece.

[0006] In an optional embodiment of the invention, the stepped conformal groove comprises:

[0007] A first conformal groove, wherein the first conformal groove is located on a plane side of a side end surface of the connecting member;

[0008] A second conformal groove is located on the arc surface side of the side end surface of the connecting member and is connected to two ends of the first conformal groove respectively, wherein the groove depth of the second conformal groove is less than the groove depth of the first conformal groove.

[0009] In an optional embodiment of the invention, the ratio between the bottom wall thickness of the first conformal groove and the wall thickness of the hub body is set within 0.9-1.

[0010] In an optional embodiment of the invention, the ratio between the groove depth of the first conformal groove and the wall thickness of the hub body is set within 0.7-2.

[0011] In an optional embodiment of the invention, the ratio between the groove bottom wall thickness of the second conformal groove and the wall thickness of the hub body is set within 0.4-0.5.

[0012] In an optional embodiment of the invention, the ratio of the outer diameter of the second conformal groove to the outer diameter of the arc surface side of the side end surface of the connecting member is set to 1.15-1.6 times.

[0013] An optional embodiment of the invention, the wind blade also includes a plurality of first reinforcing ribs, the plurality of first reinforcing ribs are located in the step conformal groove and are distributed at equal angles about the central axis of the hub body, wherein one end of the first reinforcing rib is connected to the hub body, and the other end is connected to the connecting piece.

[0014] In an optional embodiment of the invention, the fan blade further comprises an extension portion coaxially fixed to the connecting member, wherein the extension portion extends to an end surface of the hub body away from the connecting member and is provided with a second assembly hole for assembly with the motor shaft.

[0015] In an optional embodiment of the invention, the wind blade further includes a plurality of second reinforcing ribs, wherein the plurality of second reinforcing ribs are located on the hub body and are distributed at equal angles with respect to a central axis of the extension portion.

[0016] An optional embodiment of the invention, the wind blade also includes a surrounding edge, which is arranged on the end surface of the hub body away from the connecting member and surrounds the extension portion, wherein one end of the second reinforcing rib is connected to the surrounding edge, and the other end is connected to the outer side surface of the connecting member.

[0017] In an optional embodiment of the invention, the hub body, the extension portion, the second reinforcing ribs and the surrounding edge are an integrated structure.

[0018] Based on the second aspect of the present invention, a fan is further provided, the fan comprising a fan blade as described in any one of the above invention contents.

[0019] Compared with the prior art, the present invention includes a hub body and a connector integrally formed with the hub body, wherein the connector is located at the center of the hub body, and a first assembly hole is provided at the center of the connector, wherein both the connector and the first assembly hole are D-shaped structures. A stepped conformal groove arranged around the connector is provided on the outer side of the connector. Thus, a D-shaped first assembly hole is directly formed on the wind blade by one-time injection molding, which not only meets the assembly tolerance requirements, but also simplifies the production process and reduces the production cost. In addition, by introducing a stepped conformal groove on the outer side of the connector, the geometric structure of the connector can be optimized, thereby reducing the amount of cooling shrinkage caused by the difference in the structural thickness of the connector.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0022] In the attached picture:

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the first part of a fan blade provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a first three-dimensional structure of a fan blade provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the front view structure of a fan blade provided by an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0027] Figure 5 yes Figure 4 A schematic diagram of the structure enlarged at C in the middle;

[0028] Figure 6 yes Figure 3 Schematic diagram of the cross-sectional structure at BB in the middle;

[0029] Figure 7 is a second three-dimensional structural schematic diagram of a fan blade provided by an embodiment of the present invention;

[0030] Figure 8 is a schematic diagram of the second part of the three-dimensional structure of a fan blade provided by an embodiment of the present invention;

[0031] Figure numerals: 1. hub body; 2. connecting part; 201. first assembly hole; 202. plane side; 203. arc side; 3. stepped conformal groove; 31. first conformal groove; 32. second conformal groove; 4. first reinforcing rib; 5. extension part; 501. second assembly hole; 6. second reinforcing rib; 7. surrounding edge; 8. blade. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0033] The mating holes of the fan blades of the AC fan are usually designed to be D-shaped, so that they can be assembled with the D-axis of the AC motor that drives the fan to rotate, and play a role in stopping rotation and precise positioning. The current fan blades are usually made of polypropylene material or a mixture of polypropylene and glass fiber material by injection molding. However, due to the anisotropic shrinkage effect of semi-crystalline materials (the phenomenon that the shrinkage properties of the material are different in different directions), the roundness of the fan blade shaft hole meets the tolerance requirements for assembly with the D-axis of the AC motor.

[0034] In order to meet the tolerance requirements, a sleeve with a D-shaped hole structure is usually added to the shaft hole of the fan blade and fixed to the fan blade through secondary injection molding. Although this solution meets the assembly tolerance requirements, it also increases the production cost and process complexity of the fan blade.

[0035] Based on the above technical problems, an embodiment of the present invention is proposed. The embodiment of the present invention may include a hub body 1 and a connector 2 integrally formed with the hub body 1, wherein the connector 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connector 2, wherein both the connector 2 and the first assembly hole 201 are D-shaped structures. A stepped conformal groove 3 arranged around the connector 2 is provided on the outer side of the connector 2. Thus, the D-shaped first assembly hole 201 is directly formed on the wind blade by one-time injection molding, which not only meets the assembly tolerance requirements, but also simplifies the production process and reduces the production cost. In addition, by introducing a stepped conformal groove 3 on the outer side of the connector 2, the geometric structure of the connector 2 can be optimized, thereby reducing the cooling shrinkage deformation of the connector 2 caused by the difference in material thickness.

[0036] Reference Figure 1-8 The embodiment of the present invention provides a fan blade, the fan blade comprises a hub body 1 and a connecting member 2 integrally formed with the hub body 1, the connecting member 2 is located at the center of the hub body 1, and a first assembly hole 201 is opened at the center of the connecting member 2, wherein the connecting member 2 and the first assembly hole 201 are both D-shaped structures. A stepped conformal groove 3 arranged around the connecting member 2 is opened on the outer side of the connecting member 2.

[0037] In the embodiment of the present invention, the wind blade may include a hub body 1 and a connecting member 2, wherein the hub body 1 and the connecting member 2 are an integrated structure, for example, the hub body 1 and the connecting member 2 may be obtained by one-time injection molding. The radial cross-sectional shape of the hub body 1 may be circular, the connecting member 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connecting member 2 along the axial direction of the hub body 1 and passes through the connecting member 2.

[0038] The connector 2 and the first assembly hole 201 are both D-shaped structures. In other words, the radial cross-sectional shape of the connector 2 along the hub body 1 can be a D-shaped annular structure, and the radial cross-sectional shape of the first assembly hole 201 along the hub body 1 is D-shaped. Among them, the connector 2 and the first assembly hole 201 are both D-shaped structures, and the plane side 202 of the side end face of the connector 2 is arranged parallel to the plane side 202 end of the first assembly hole 201, so that the consistency of the hole wall thickness of the first assembly hole 201 (also referred to as the wall thickness of the connector 2) can be improved. In this way, the elliptical deformation problem caused by the anisotropic shrinkage of the material caused by the difference in the hole wall thickness of the first assembly hole 201 can be reduced, and the assembly roundness or assembly accuracy of the connector 2 and the motor shaft can be improved.

[0039] The outer side of the connector 2 is provided with a stepped conformal groove 3 arranged around the connector 2. Since the connector 2 and the hub body 1 are an integrated structure, a stepped conformal groove 3 can be arranged at the connection between the connector 2 and the hub body 1, wherein the stepped conformal groove 3 is arranged around the outer end surface of the connector 2. For example, the radial cross-sectional shape of the stepped conformal groove 3 along the hub body 1 is an annular structure wrapping the connector 2. For example, the outer edge of the radial cross-sectional shape of the stepped conformal groove 3 along the hub body 1 is circular. Therefore, the wall thickness uniformity of the connection between the connector 2 and the hub body 1 can be improved by setting the stepped conformal groove 3, so that the elliptical deformation problem caused by the anisotropic shrinkage of the material due to the difference in wall thickness at the connection between the connector 2 and the hub body 1 can be further reduced, thereby improving the assembly accuracy of the connector 2 and the motor shaft.

[0040] An optional embodiment of the invention, referring to Figure 1 , Figure 4 , Figure 5 as well as Figure 6 As shown, the stepped conformal groove 3 may include a first conformal groove 31 and a second conformal groove 32, wherein the first conformal groove 31 is located on the plane side 202 of the side end surface of the connecting member 2, and the second conformal groove 32 is located on the arc surface side 203 of the side end surface of the connecting member 2, and is respectively connected to both ends of the first conformal groove 31, wherein the groove depth of the second conformal groove 32 is less than the groove depth of the first conformal groove 31.

[0041] In the embodiment of the present invention, the step conformal groove 3 refers to at least two conformal grooves, and the depths of the conformal grooves are different, so that the junction of the two conformal grooves is a step structure. For example, the step conformal groove 3 may include a first conformal groove 31 and a second conformal groove 32. The first conformal groove 31 is located on the plane side 202 of the side end surface of the connector 2, and the second conformal groove 32 is located on the arc side 203 of the side end surface of the connector 2. The two ends of the first conformal groove 31 and the two ends of the second conformal groove 32 are respectively connected, so that the connector 2 can be completely wrapped by the cooperation of the first conformal groove 31 and the second conformal groove 32.

[0042] Considering that the geometric stability of the plane side 202 of the side end face of the connecting member 2 is worse than the geometric stability of the arc side 203 of the side end face of the connecting member 2, it is easy to cause material deformation, resulting in deformation of the first assembly hole 201, thereby affecting the assembly accuracy of the connecting member 2 and the motor shaft. Therefore, the groove depth of the second conformal groove 32 is less than the groove depth of the first conformal groove 31, so that the connecting member 2 is connected to the hub body 1 at the plane side 202 through the groove bottom of the first conformal groove 31, and the connecting member 2 is connected to the hub body 1 at the arc side 203 through the groove bottom of the second conformal groove 32. Therefore, the connecting member 2 can be structurally supported at different positions along the axial direction of the hub body 1 through the groove bottom of the first conformal groove 31 and the groove bottom of the second conformal groove 32, thereby improving the force uniformity of the connecting member 2 and reducing the cooling shrinkage deformation of the connecting member 2 caused by the difference in material thickness.

[0043] An optional embodiment of the invention, referring to Figure 5 As shown, the ratio between the bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is set within 0.9-1.

[0044] In the embodiment of the present invention, the groove bottom wall thickness of the first conformal groove 31 can be understood as the wall thickness H1 of the connection between the hub body 1 and the plane side 202 of the side end surface of the connecting member 2, the wall thickness of the hub body 1 can be understood as the wall thickness H2 of the hub body 1 in the radial direction, and the ratio between the groove bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is set within 0.9-1, which can be understood as the ratio between the groove bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is greater than or equal to 0.9, and the ratio between the groove bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is less than or equal to 1 at the same time. Within this ratio limit range, the connection strength between the connecting member 2 and the hub body 1 on the plane side 202 and the uniformity of the wall thickness can be guaranteed. If the ratio of the bottom wall thickness of the first conformal groove 31 to the wall thickness of the hub body 1 is less than 0.9, the wall thickness of the connection between the connecting member 2 and the hub body 1 on the plane side 202 is relatively small, which can easily lead to obvious anisotropic shrinkage effect of the material due to the excessive thin injection molding thickness at the connection between the connecting member 2 and the hub body 1 on the plane side 202, increase the cooling shrinkage rate of the connecting member 2, and reduce the assembly accuracy of the connecting member 2 and the motor shaft.

[0045] If the ratio of the bottom wall thickness of the first conformal groove 31 to the wall thickness of the hub body 1 is greater than 1, the wall thickness of the connection between the connecting member 2 and the hub body 1 on the plane side 202 is thicker, which can easily lead to aggravated unevenness in the wall thickness between the connection and the connecting member 2 due to the excessive injection molding thickness at the connection between the connecting member 2 and the hub body 1 on the plane side 202, resulting in obvious anisotropic shrinkage effect of the material of the connecting member 2, and increasing the cooling shrinkage rate of the connecting member 2, thereby reducing the assembly accuracy of the connecting member 2 and the motor shaft.

[0046] For example, the bottom wall thickness H1 of the first conformal groove 31 may be 2 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2.2 mm. The ratio between the bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 0.91. For another example, the bottom wall thickness H1 of the first conformal groove 31 may be 1.8 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2 mm. The ratio between the bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 0.9. For another example, the bottom wall thickness H1 of the first conformal groove 31 may be 2 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2 mm. The ratio between the bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 1. Those skilled in the art can select the bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 according to actual processing requirements and the limited range of the ratio between the bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 as described above, without making too many restrictions here.

[0047] An optional embodiment of the invention, referring to Figure 5 As shown, the ratio between the groove depth of the first conformal groove 31 and the wall thickness of the hub body 1 is set within 0.7-2.

[0048] In the embodiment of the present invention, the groove depth of the first conformal groove 31 refers to the opening depth S1 of the first conformal groove 31 along the axial direction of the hub body 1. The ratio between the groove depth S1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is set within 0.7-2, which can be understood as the ratio between the groove depth S1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is greater than or equal to 0.7, and the ratio between the groove depth S1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is less than or equal to 2. Within this ratio limit, it can be ensured that the groove bottom of the first conformal groove 31 is lower than the groove bottom of the second conformal groove 32 by a certain distance along the axial direction of the hub body 1, thereby reducing the shrinkage rate of the connector 2 at the plane side 202 due to the anisotropic shrinkage effect of the material.

[0049] If the ratio of the groove depth of the first conformal groove 31 to the wall thickness H2 of the hub body 1 is less than 0.7, the thickness of the groove bottom of the first conformal groove 31 is too large. If the ratio of the groove depth of the first conformal groove 31 to the wall thickness H2 of the hub body 1 is greater than 2, the thickness of the groove bottom of the first conformal groove 31 is too thin. In the case of excessive thickness or too thin thickness, the wall thickness of the connection between the connecting member 2 and the hub body 1 on the plane side 202 and the uneven distribution of the wall thickness of the connecting member 2 will be greatly increased, resulting in a significant anisotropic shrinkage effect of the material of the connecting member 2, and increasing the cooling shrinkage rate of the connecting member 2, thereby reducing the assembly accuracy of the connecting member 2 and the motor shaft.

[0050] For example, the groove depth S1 of the first conformal groove 31 may be 4 mm, and the wall thickness H2 of the hub body 1 may be 2.2 mm. The ratio of the groove depth S1 of the first conformal groove 31 to the wall thickness H2 of the hub body 1 is 1.82. For another example, the groove depth S1 of the first conformal groove 31 may be 1.5 mm, and the wall thickness H2 of the hub body 1 may be 2.2 mm. The ratio of the groove depth S1 of the first conformal groove 31 to the wall thickness H2 of the hub body 1 is 0.68. For another example, the groove depth S1 of the first conformal groove 31 may be 4.4 mm, and the wall thickness H2 of the hub body 1 may be 2.2 mm. The ratio of the groove depth S1 of the first conformal groove 31 to the wall thickness H2 of the hub body 1 is 2. Those skilled in the art can select the bottom wall thickness of the second conformal groove 32 and the wall thickness of the hub body 1 according to actual processing requirements and the limited range of the ratio between the bottom wall thickness of the second conformal groove 32 and the wall thickness of the hub body 1 as described above, without making too many restrictions here.

[0051] An optional embodiment of the invention, referring to Figure 5 As shown, the ratio between the bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is set within 0.9-1. The ratio between the bottom wall thickness of the second conformal groove 32 and the wall thickness of the hub body 1 is set within 0.4-0.5.

[0052] In the embodiment of the present invention, the groove bottom wall thickness of the first conformal groove 31 can be understood as the wall thickness H1 of the connection between the hub body 1 and the plane side 202 of the side end surface of the connecting member 2, the wall thickness of the hub body 1 can be understood as the wall thickness H2 of the hub body 1 in the radial direction, and the ratio between the groove bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is set within 0.9-1, which can be understood as the ratio between the groove bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is greater than or equal to 0.9, and the ratio between the groove bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 is less than or equal to 1 at the same time. Within this ratio limit range, the connection strength between the connecting member 2 and the hub body 1 on the plane side 202 and the uniformity of the wall thickness can be guaranteed. If the ratio of the bottom wall thickness of the first conformal groove 31 to the wall thickness of the hub body 1 is less than 0.9, the wall thickness of the connection between the connector 2 and the hub body 1 on the plane side 202 is relatively small. Since the injection molding thickness is too thin at the connection between the connector 2 and the hub body 1 on the plane side 202, the anisotropic shrinkage effect of the material is obvious, and the cooling shrinkage rate of the connector 2 is increased, thereby reducing the assembly accuracy of the connector 2 and the motor shaft.

[0053] If the ratio of the bottom wall thickness of the first conformal groove 31 to the wall thickness of the hub body 1 is greater than 1, the wall thickness of the connection between the connecting member 2 and the hub body 1 on the plane side 202 is thicker, which can easily lead to aggravated unevenness in the wall thickness between the connection and the connecting member 2 due to the excessive injection molding thickness at the connection between the connecting member 2 and the hub body 1 on the plane side 202, resulting in obvious anisotropic shrinkage effect of the material of the connecting member 2, and increasing the cooling shrinkage rate of the connecting member 2, thereby reducing the assembly accuracy of the connecting member 2 and the motor shaft.

[0054] For example, the bottom wall thickness H1 of the first conformal groove 31 may be 2 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2.2 mm. The ratio between the bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 0.91. For another example, the bottom wall thickness H1 of the first conformal groove 31 may be 1.8 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2 mm. The ratio between the bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 0.9. For another example, the bottom wall thickness H1 of the first conformal groove 31 may be 2 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2 mm. The ratio between the bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 1. Those skilled in the art can select the bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 according to actual processing requirements and the limited range of the ratio between the bottom wall thickness of the first conformal groove 31 and the wall thickness of the hub body 1 as described above, without making too many restrictions here.

[0055] The bottom wall thickness of the second conformal groove 32 can be understood as the wall thickness H3 at the connection between the hub body 1 and the arc side 203 of the connecting member 2. The ratio of the bottom wall thickness H3 of the second conformal groove 32 to the wall thickness H2 of the hub body 1 is set within 0.4-0.5, which can be understood as the ratio of the bottom wall thickness of the second conformal groove 32 to the wall thickness of the hub body 1 is greater than or equal to 0.4, and the ratio of the bottom wall thickness of the second conformal groove 32 to the wall thickness of the hub body 1 is less than or equal to 0.5 at the same time. Within the limited range of this ratio, the connection strength between the connecting member 2 and the hub body 1 at the arc surface side 203 can be ensured, and the geometric structure distribution at the plane side 202 of the connecting member 2 can be adjusted by thinning the bottom thickness of the second conformal groove 32 so that the bottom thickness of the first conformal groove 31 is greater than the bottom thickness of the second conformal groove 32, thereby reducing the elliptical deformation or warping deformation of the connecting member 2 caused by anisotropic shrinkage of the material.

[0056] If the ratio of the bottom wall thickness of the second conformal groove 32 to the wall thickness of the hub body 1 is less than 0.4, it is determined that the bottom wall thickness of the second conformal groove 32 is too thin. If the ratio of the bottom wall thickness of the second conformal groove 32 to the wall thickness of the hub body 1 is greater than 0.5, it is determined that the bottom wall thickness of the second conformal groove 32 is too thick. In the case of too thick or too thin thickness, the wall thickness at the connection between the connector 2 and the hub body 1 on the arc side 203 and the uneven distribution of the wall thickness of the connector 2 will be greatly increased. In the case where the local shrinkage inconsistency of the D-type connector 2 cannot be compensated by a reasonable wall thickness range, the material anisotropic shrinkage effect of the connector 2 will be obvious, which reduces the assembly accuracy of the connector 2 and the motor shaft.

[0057] For example, the groove bottom wall thickness H3 of the second conformal groove 32 may be 1 mm, and the wall thickness H2 of the hub body 1 may be 2 mm. The ratio between the groove bottom wall thickness H3 of the second conformal groove 32 and the wall thickness H2 of the hub body 1 is 0.5. For another example, the groove bottom wall thickness H3 of the second conformal groove 32 may be 0.8 mm, and the wall thickness H2 of the hub body 1 may be 2 mm. The ratio between the groove bottom wall thickness H3 of the second conformal groove 32 and the wall thickness H2 of the hub body 1 is 0.4. For another example, the groove bottom wall thickness H1 of the first conformal groove 31 may be 1 mm (millimeter), and the wall thickness H2 of the hub body 1 may be 2.2 mm. The ratio between the groove bottom wall thickness H1 of the first conformal groove 31 and the wall thickness H2 of the hub body 1 is 0.45. Those skilled in the art can select the bottom wall thickness of the second conformal groove 32 and the wall thickness of the hub body 1 according to actual processing requirements and the limited range of the ratio between the bottom wall thickness of the second conformal groove 32 and the wall thickness of the hub body 1 as described above, without making too many restrictions here.

[0058] An optional embodiment of the invention, referring to Figure 1 As shown, the ratio between the outer diameter of the second conformal groove 32 and the outer diameter of the arc surface side 203 of the side end surface of the connecting member 2 is set to 1.15-1.6 times.

[0059] In the embodiment of the present invention, the outer edge of the second conformal groove 32 and the outer edge of the first conformal groove 31 are circular along the radial cross-section of the hub body 1. That is, the outer edge of the second conformal groove 32 and the outer edge of the first conformal groove 31 are cocircular and connected to each other. The arc side 203 of the connector 2 is more than half a circle along the radial cross-section of the hub body 1. The ratio between the outer diameter R1 of the second conformal groove 32 and the outer diameter R2 of the arc side 203 of the side end face of the connector 2 is set at 1.15-1.6 times, which can be understood as the ratio between the outer diameter of the second conformal groove 32 and the outer diameter of the arc side 203 of the side end face of the connector 2 is greater than or equal to 1.15, and the ratio between the outer diameter of the second conformal groove 32 and the outer diameter of the arc side 203 of the side end face of the connector 2 is less than or equal to 1.6. Within the limited range of this ratio, it can be ensured that the bottom of the first conformal groove 31 and the bottom of the second conformal groove 32 extend along the radial direction of the hub body 1 to a certain length, so that the difference in the bottom thickness of the first conformal groove 31 and the bottom thickness of the second conformal groove 32 can be used to reduce the material anisotropic shrinkage effect on the geometric structure of the connecting member 2. Thus, the elliptical deformation or warping deformation of the connecting member 2 caused by the anisotropic shrinkage of the material can be reduced.

[0060] If the ratio of the outer diameter R1 of the second conformal groove 32 to the outer diameter R2 of the arc surface side 203 of the side end face of the connector 2 is less than 1.15, it is determined that the opening width of the second conformal groove 32 is too narrow. If the ratio of the outer diameter R1 of the second conformal groove 32 to the outer diameter R2 of the arc surface side 203 of the side end face of the connector 2 is greater than 1.6, it is determined that the opening width of the second conformal groove 32 is too wide. In the case where the groove width is too wide or too narrow, the local shrinkage inconsistency of the D-type connector 2 cannot be compensated by the stepped conformal groove 3, which will cause the material anisotropic shrinkage effect of the connector 2 to be obvious, reducing the assembly accuracy of the connector 2 and the motor shaft.

[0061] For example, the outer diameter R1 of the second conformal groove 32 may be 15.13 mm, and the outer diameter R2 of the arc surface side 203 of the side end surface of the connecting member 2 may be 13.13 mm. The ratio between the outer diameter R1 of the second conformal groove 32 and the outer diameter R2 of the arc surface side 203 of the side end surface of the connecting member 2 is 1.15. For another example, the outer diameter R1 of the second conformal groove 32 may be 21 mm, and the outer diameter R2 of the arc surface side 203 of the side end surface of the connecting member 2 may be 13.13 mm. The ratio between the outer diameter R1 of the second conformal groove 32 and the outer diameter R2 of the arc surface side 203 of the side end surface of the connecting member 2 is 1.6. For another example, the outer diameter R1 of the second conformal groove 32 may be 18.75 mm, and the outer diameter R2 of the arc surface side 203 of the side end surface of the connecting member 2 may be 15 mm. The ratio of the outer diameter R1 of the second conformal groove 32 to the outer diameter R2 of the arc surface side 203 of the side end surface of the connecting member 2 is 1.25. Those skilled in the art can select the outer diameter of the second conformal groove 32 and the outer diameter of the arc surface side 203 of the side end surface of the connecting member 2 according to actual processing requirements and the limited range of the ratio of the outer diameter of the second conformal groove 32 and the outer diameter of the arc surface side 203 of the side end surface of the connecting member 2 described above, and no excessive restrictions are made here.

[0062] An optional embodiment of the invention, referring to Figure 1 , Figure 4 as well as Figure 6 As shown, the wind blade includes a hub body 1, a connecting member 2 integrally formed with the hub body 1, and a plurality of first reinforcing ribs 4, wherein the connecting member 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connecting member 2, wherein both the connecting member 2 and the first assembly hole 201 are D-shaped structures. A stepped conformal groove 3 arranged around the connecting member 2 is provided on the outer side of the connecting member 2, so as to support the assembly roundness of the connecting member 2 and the motor shaft through the stepped conformal groove 3. A plurality of the first reinforcing ribs 4 are located in the stepped conformal groove 3, and are distributed at equal angles with respect to the central axis of the hub body 1, wherein one end of the first reinforcing rib 4 is connected to the hub body 1, and the other end is connected to the connecting member 2.

[0063] In the embodiment of the present invention, the wind blade may include a hub body 1 and a connecting member 2, wherein the hub body 1 and the connecting member 2 are an integrated structure, for example, the hub body 1 and the connecting member 2 may be obtained by one-time injection molding. The radial cross-sectional shape of the hub body 1 may be circular, the connecting member 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connecting member 2 along the axial direction of the hub body 1 and passes through the connecting member 2.

[0064] The connector 2 and the first assembly hole 201 are both D-shaped structures. In other words, the radial cross-sectional shape of the connector 2 along the hub body 1 can be a D-shaped annular structure, and the radial cross-sectional shape of the first assembly hole 201 along the hub body 1 is D-shaped. Among them, the connector 2 and the first assembly hole 201 are both D-shaped structures, and the plane side 202 of the side end face of the connector 2 is arranged parallel to the plane side 202 end of the first assembly hole 201, so that the consistency of the hole wall thickness of the first assembly hole 201 (also referred to as the wall thickness of the connector 2) can be improved. In this way, the elliptical deformation problem caused by the anisotropic shrinkage of the material caused by the difference in the hole wall thickness of the first assembly hole 201 can be reduced, and the assembly roundness or assembly accuracy of the connector 2 and the motor shaft can be improved.

[0065] The outer side of the connector 2 is provided with a stepped conformal groove 3 arranged around the connector 2. Since the connector 2 and the hub body 1 are an integrated structure, a stepped conformal groove 3 can be arranged at the connection between the connector 2 and the hub body 1, wherein the stepped conformal groove 3 is arranged around the outer end surface of the connector 2. For example, the radial cross-sectional shape of the stepped conformal groove 3 along the hub body 1 is an annular structure wrapping the connector 2. For example, the outer edge of the radial cross-sectional shape of the stepped conformal groove 3 along the hub body 1 is circular. Therefore, the wall thickness uniformity of the connection between the connector 2 and the hub body 1 can be improved by setting the stepped conformal groove 3, so that the elliptical deformation problem caused by the anisotropic shrinkage of the material due to the difference in wall thickness at the connection between the connector 2 and the hub body 1 can be further reduced, thereby improving the assembly accuracy of the connector 2 and the motor shaft.

[0066] A plurality of the first reinforcing ribs 4 are arranged in the stepped conformal groove 3 and are distributed at equal angles with respect to the central axis of the hub body 1. For example, a portion of the first reinforcing ribs 4 is located in the first conformal groove 31 and connected to the bottom of the first conformal groove 31, and another portion of the first reinforcing ribs 4 is located in the second conformal groove 32 and connected to the bottom of the second conformal groove 32. Those skilled in the art can determine the number of the first reinforcing ribs 4 according to actual test results. For example, the number of the first reinforcing ribs 4 can be 3, 4, 5, and 6, etc., which are not limited here. One end of the first reinforcing rib 4 is connected to the hub body 1, and the other end is connected to the connector 2, so that the hub body 1 and the connector 2 can be connected for a second time through the first reinforcing rib 4, which can improve the structural strength of the connection between the connector 2 and the hub body 1, thereby reducing the wall thickness difference at the connection between the connector 2 and the hub body 1, and the amount of elliptical deformation caused by the anisotropic shrinkage of the material. The first reinforcing rib 4, the hub body 1 and the connecting piece 2 are an integrated structure.

[0067] An optional embodiment of the invention, referring to Figure 4 , Figure 6 , Figure 7 as well as Figure 8 As shown, the fan blade also includes an extension portion 5 coaxially fixed to the connecting member 2, wherein the extension portion 5 extends to the end surface of the hub body 1 away from the connecting member 2 and is provided with a second assembly hole 501 assembled with the motor shaft.

[0068] In the embodiment of the present invention, the fan blade may further include an extension portion 5 coaxially fixed with the connector 2, wherein the coaxial fixation may be understood as the connector 2 being fixed with the extension portion 5, and the central axis of the connector 2 coincides with the central axis of the extension portion 5. The extension portion 5 extends to the end surface of the hub body 1 away from the connector 2, wherein the extension portion 5 is connected to the connector 2 along the axial direction of the hub body 1, and a second assembly hole 501 for assembly with the motor shaft is provided on the extension portion 5. The second assembly hole 501 is connected with the first assembly hole 201, and the radial cross section along the hub body 1 is circular. Therefore, when assembling the fan blade with the hub body 1, the motor shaft may be inserted into the extension portion 5, and the D-axis region of the motor shaft may be inserted into the connector 2, thereby forming an assembly of the connector 2 with the motor shaft. The provision of the extension portion 5 can extend the axial limiting length of the fan blade on the motor shaft, thereby improving the assembly roundness of the connecting member 2 and the motor shaft.

[0069] An optional embodiment of the invention, referring to Figure 7 and Figure 8 As shown, the wind blade includes a hub body 1, a connecting member 2 integrally formed with the hub body 1, an extension portion 5 coaxially fixed with the connecting member 2, and a plurality of second reinforcing ribs 6, wherein the connecting member 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connecting member 2, wherein both the connecting member 2 and the first assembly hole 201 are D-shaped structures. A stepped conformal groove 3 arranged around the connecting member 2 is provided on the outer side of the connecting member 2 to support the assembly roundness of the connecting member 2 and the motor shaft through the stepped conformal groove 3. The extension portion 5 extends to the end face of the hub body 1 away from the connecting member 2, and a second assembly hole 501 assembled with the motor shaft is provided. A plurality of the second reinforcing ribs 6 are located on the hub body 1, and are distributed at equal angles with respect to the central axis of the extension portion 5.

[0070] In the embodiment of the present invention, the wind blade may include a hub body 1 and a connecting member 2, wherein the hub body 1 and the connecting member 2 are an integrated structure, for example, the hub body 1 and the connecting member 2 may be obtained by one-time injection molding. The radial cross-sectional shape of the hub body 1 may be circular, the connecting member 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connecting member 2 along the axial direction of the hub body 1 and passes through the connecting member 2.

[0071] The connector 2 and the first assembly hole 201 are both D-shaped structures. In other words, the radial cross-sectional shape of the connector 2 along the hub body 1 can be a D-shaped annular structure, and the radial cross-sectional shape of the first assembly hole 201 along the hub body 1 is D-shaped. Among them, the connector 2 and the first assembly hole 201 are both D-shaped structures, and the plane side 202 of the side end face of the connector 2 is arranged parallel to the plane side 202 end of the first assembly hole 201, so that the consistency of the hole wall thickness of the first assembly hole 201 (also referred to as the wall thickness of the connector 2) can be improved. In this way, the elliptical deformation problem caused by the anisotropic shrinkage of the material caused by the difference in the hole wall thickness of the first assembly hole 201 can be reduced, and the assembly roundness or assembly accuracy of the connector 2 and the motor shaft can be improved.

[0072] The outer side of the connector 2 is provided with a stepped conformal groove 3 arranged around the connector 2. Since the connector 2 and the hub body 1 are an integrated structure, a stepped conformal groove 3 can be arranged at the connection between the connector 2 and the hub body 1, wherein the stepped conformal groove 3 is arranged around the outer end surface of the connector 2. For example, the radial cross-sectional shape of the stepped conformal groove 3 along the hub body 1 is an annular structure wrapping the connector 2. For example, the outer edge of the radial cross-sectional shape of the stepped conformal groove 3 along the hub body 1 is circular. Therefore, the wall thickness uniformity of the connection between the connector 2 and the hub body 1 can be improved by setting the stepped conformal groove 3, so that the elliptical deformation problem caused by the anisotropic shrinkage of the material due to the difference in wall thickness at the connection between the connector 2 and the hub body 1 can be further reduced, thereby improving the assembly accuracy of the connector 2 and the motor shaft.

[0073] Coaxial fixation can be understood as the connection member 2 being fixed to the extension portion 5, and the central axis of the connection member 2 coincides with the central axis of the extension portion 5. The extension portion 5 extends to the end surface of the hub body 1 away from the connection member 2, wherein the extension portion 5 is connected to the connection member 2 along the axial direction of the hub body 1, and a second assembly hole 501 for assembly with the motor shaft is provided on the extension portion 5. The second assembly hole 501 is connected to the first assembly hole 201, and the radial cross section along the hub body 1 is circular. Therefore, when assembling the fan blade with the hub body 1, the motor shaft can be inserted into the extension portion 5, and the D-axis region of the motor shaft can be inserted into the connection member 2, thereby forming the assembly of the connection member 2 with the motor shaft. The provision of the extension portion 5 can extend the axial limiting length of the fan blade on the motor shaft, thereby improving the assembly roundness of the connection member 2 with the motor shaft.

[0074] A plurality of second reinforcing ribs 6 are located on the hub body 1 and are distributed at equal angles with respect to the central axis of the extension portion 5. For example, a plurality of second reinforcing ribs 6 are located on the end face of the hub body 1 away from the connector 2. Those skilled in the art can determine the number of the second reinforcing ribs 6 according to actual design requirements. For example, the number of the second reinforcing ribs 6 can be 3, 4, 5, 6, and 7, etc., which are not limited here. The second reinforcing rib 6 can be connected to the hub body 1, and is extended radially along the hub body 1. One end of the second reinforcing rib 6 is connected to the outer end face of the extension portion 5, so that it can be supported by the structure of the second reinforcing rib 6. The structural strength of the extension portion 5 is improved, and thereby the structural stability of the connector 2 is further improved.

[0075] In other embodiments, when a mixed material of polypropylene and glass fiber is used for integral injection molding, the glass fiber will be arranged or oriented in a certain direction during the injection molding process. By adding the stepped conformal groove 3, the distribution direction of the glass fiber in the connector 2 can be changed during the injection molding process, reducing the shrinkage and deformation of the parts due to the uneven distribution direction, and reducing the risk of the connector 2 shrinking inwards when cooling. Thereby, the dimensional accuracy and structural stability of the connector 2 can be improved. Moreover, the risk of the connector 2 shrinking inwards when cooling is further reduced by the directional arrangement support of the second reinforcing ribs 6. Thereby, the processing accuracy of the integrally molded connector 2 can be improved, so that it can meet the tolerance requirements for assembly with the motor shaft, and the assembly roundness of the connector 2 and the motor shaft can be improved.

[0076] An optional embodiment of the invention, referring to Figure 4 , Figure 6 , Figure 7 as well as Figure 8 As shown, the wind blade also includes a peripheral edge 7, which is arranged on the end surface of the hub body 1 away from the connecting member 2 and surrounds the extension portion 5, wherein one end of the second reinforcing rib 6 is connected to the peripheral edge 7, and the other end is connected to the outer side surface of the connecting member 2.

[0077] In the embodiment of the present invention, the wind blade may further include a rim 7, which is disposed on the end surface of the hub body 1 away from the connecting member 2 and surrounds the extension portion 5. That is, the rim 7 has a circular ring shape along the radial cross section on the hub body 1. On the one hand, the rim 7 may form a structural support for one end of the second reinforcing rib 6 to increase the support strength of the second reinforcing rib 6 for the extension portion 5. On the other hand, the rim 7 may be connected to the edge of the hub body 1 and may be cocircularly arranged with the edge of the hub body 1, so that the side area of ​​the hub body 1 may be expanded by the rim 7 to provide a sufficient assembly area for connecting the blades 8 of the wind blade to the hub body 1.

[0078] In other embodiments, multiple blades 8 can be distributed at equal angles around the center of the hub body 1. Those skilled in the art can determine the number of blades 8 based on actual design requirements. For example, the number of blades 8 can be 3, 4, 5, 6, 7, etc., and no further restrictions are made here.

[0079] In some embodiments, the wind blade may further include a flange, which is located on the end surface of the hub body 1 close to the connecting member 2, and the flange may be arranged cocircularly with the edge of the hub body 1. In other words, the flange may be used to further increase the side area of ​​the hub body 1 to facilitate the assembly of the blade 8.

[0080] In an optional embodiment of the invention, the hub body 1, the extension portion 5, the second reinforcing rib 6 and the surrounding edge 7 are an integrated structure.

[0081] In the embodiment of the present invention, the hub body 1, the connecting part 2, the extension part 5, the first reinforcing rib 4, the second reinforcing rib 6 and the surrounding edge 7 and other structures can all be an integrated structure, that is, the fan blade can be obtained by one-time injection molding, which simplifies the production process of the fan blade and reduces the production cost of the fan blade.

[0082] In summary, an embodiment of the present invention discloses a fan blade, which may include a hub body 1 and a connector 2 integrally formed with the hub body 1, wherein the connector 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connector 2, wherein both the connector 2 and the first assembly hole 201 are D-shaped structures. A stepped conformal groove 3 arranged around the connector 2 is provided on the outer side of the connector 2 to support the assembly roundness of the connector 2 and the motor shaft through the stepped conformal groove 3. Thus, the D-shaped first assembly hole 201 is directly formed on the fan blade by one-time injection molding, which not only meets the assembly tolerance requirements, but also simplifies the production process and reduces the production cost. In addition, by introducing the stepped conformal groove 3 on the outer side of the connector 2, the geometric structure of the connector 2 can be optimized, thereby reducing the cooling shrinkage deformation of the connector 2 caused by the difference in material thickness.

[0083] An embodiment of the present invention discloses a fan, which may include the fan blades described in any one of the above-mentioned embodiments of the invention.

[0084] In an embodiment of the present invention, the fan may include but is not limited to a floor fan, a wall-mounted fan, a desktop fan, etc. The fan may include a hub body 1 and a connector 2 integrally formed with the hub body 1, the connector 2 being located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connector 2, wherein both the connector 2 and the first assembly hole 201 are D-shaped structures. A stepped conformal groove 3 arranged around the connector 2 is provided on the outer side of the connector 2 to support the assembly roundness of the connector 2 and the motor shaft through the stepped conformal groove 3. Thus, the D-shaped first assembly hole 201 is directly formed on the fan blade by one-time injection molding, which not only meets the assembly tolerance requirements, but also simplifies the production process and reduces the production cost. In addition, by introducing a stepped conformal groove 3 on the outer side of the connector 2, the geometric structure of the connector 2 can be optimized, thereby reducing the cooling shrinkage deformation of the connector 2 caused by the difference in material thickness.

[0085] In summary, an embodiment of the present invention discloses a fan blade and a fan. The embodiment of the present invention may include a hub body 1 and a connector 2 integrally formed with the hub body 1, wherein the connector 2 is located at the center of the hub body 1, and a first assembly hole 201 is provided at the center of the connector 2, wherein both the connector 2 and the first assembly hole 201 are D-shaped structures. A stepped conformal groove 3 arranged around the connector 2 is provided on the outer side of the connector 2 to support the assembly roundness of the connector 2 and the motor shaft through the stepped conformal groove 3. Thus, the D-shaped first assembly hole 201 is directly formed on the fan blade by one-time injection molding, which not only meets the assembly tolerance requirements, but also simplifies the production process and reduces the production cost. In addition, by introducing a stepped conformal groove 3 on the outer side of the connector 2, the geometric structure of the connector 2 can be optimized, thereby reducing the cooling shrinkage deformation of the connector 2 caused by the difference in material thickness.

[0086] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0087] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0088] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0089] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof.

[0090] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

Claims

1. A fan blade, characterized in that: The wind blade comprises a hub body (1) and a connecting piece (2) integrally formed with the hub body (1), the connecting piece (2) being located at the center of the hub body (1), and a first assembly hole (201) being provided at the center of the connecting piece (2), wherein the connecting piece (2) and the first assembly hole (201) are both D-shaped structures, and a stepped conformal groove (3) arranged around the connecting piece (2) is provided on the outer side of the connecting piece (2).

2. The fan blade according to claim 1, characterized in that: The stepped conformal groove (3) comprises: A first conformal groove (31), the first conformal groove (31) being located on a plane side (202) of a side end surface of the connecting member (2); A second conformal groove (32), the second conformal groove (32) is located on the arc surface side (203) of the side end surface of the connecting member (2), and is respectively connected to two ends of the first conformal groove (31), wherein the groove depth of the second conformal groove (32) is less than the groove depth of the first conformal groove (31).

3. The fan blade according to claim 2, characterized in that: The ratio between the bottom wall thickness of the first conformal groove (31) and the wall thickness of the hub body (1) is set within a range of 0.9-1.

4. The fan blade according to claim 2, characterized in that: The ratio between the groove depth of the first conformal groove (31) and the wall thickness of the hub body (1) is set within a range of 0.7-2.

5. The fan blade according to claim 2, characterized in that: The ratio between the groove bottom wall thickness of the second conformal groove (32) and the wall thickness of the hub body (1) is set within 0.4-0.

5.

6. The fan blade according to claim 2, characterized in that: The ratio between the outer diameter of the second conformal groove (32) and the outer diameter of the arc surface side (203) of the side end surface of the connecting member (2) is set at 1.15-1.6 times.

7. The fan blade according to claim 1, characterized in that: The wind blade further comprises a plurality of first reinforcing ribs (4), wherein the plurality of first reinforcing ribs (4) are located in the stepped conformal groove (3) and are distributed at equal angles with respect to the central axis of the hub body (1), wherein one end of the first reinforcing rib (4) is connected to the hub body (1), and the other end is connected to the connecting member (2).

8. The fan blade according to claim 1, characterized in that: The fan blade also includes an extension portion (5) coaxially fixed to the connecting member (2), wherein the extension portion (5) extends to the outside of the end surface of the hub body (1) away from the connecting member (2) and is provided with a second assembly hole (501) for assembly with a motor shaft.

9. The fan blade according to claim 8, characterized in that: The wind blade further comprises a plurality of second reinforcing ribs (6), wherein the plurality of second reinforcing ribs (6) are located on the hub body (1) and are distributed at equal angles with respect to the central axis of the extension portion (5).

10. The fan blade according to claim 9, characterized in that: The wind blade further comprises a peripheral edge (7), wherein the peripheral edge (7) is arranged on the end surface of the hub body (1) away from the connecting member (2) and surrounds the extension portion (5), wherein one end of the second reinforcing rib (6) is connected to the peripheral edge (7) and the other end is connected to the outer side surface of the connecting member (2).

11. The fan blade according to claim 10, characterized in that: The hub body, the extension portion (5), the second reinforcing rib (6) and the surrounding edge (7) are an integrated structure.

12. A fan, characterized in that: The fan comprises a fan blade as described in any one of claims 1-11.

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