Fan blade assembly and fan

Abstract

The utility model discloses a fan blade assembly and a fan. The fan blade assembly comprises a hub, the hub comprises a plurality of first mounting parts arranged on the outer wall of the hub at intervals in the circumferential direction, strip-shaped holes are formed in the hub on the edges of the first mounting parts, and a plurality of mounting tables corresponding to the strip-shaped holes are arranged in an inner cavity of the hub; the fan blade comprises a fan blade main body and a second mounting part arranged at one end of the fan blade main body, the second mounting part comprises a first bent surface and a second bent surface which are connected with each other, the second bent surface penetrates through the strip-shaped hole and is mounted on the mounting table, and the first bent surface is attached to the first mounting part, so that the mounting position of the fan blade is conveniently determined, the operation is simple, and the mounting efficiency is improved. The connection stability of the fan blades and the hub is ensured, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and in particular to a fan blade assembly and a fan. Background Art

[0002] Some existing fan impellers are usually composed of a hub and blades. Screws or bolts are generally used to lock the blades on the hub. However, the hub has a certain inclination angle for the socket to adapt to the curved shape of the blades, and the corresponding mounting seat inside the hub also forms an inclined surface. When installing the blades, positioning is required to ensure alignment with the connecting holes of the hub and then tighten the mounting screws, which is cumbersome. In addition, since the blades are directly inserted into the holes of the hub when installing, the blades are prone to shaking, and the screws need to be tightened while the blade installation position is fixed. Not only is the installation operation inconvenient, time-consuming and labor-intensive, but it also affects the stability of the connecting parts, resulting in loose blade connections, and problems such as vibration or noise when the fan is running. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a fan blade assembly and a fan, which are convenient for determining the installation position of the fan blade, simple to operate, ensure the stability of the connection between the fan blade and the hub, and improve the installation efficiency.

[0004] The fan blade assembly according to the first embodiment of the utility model includes:

[0005] The wheel hub comprises a plurality of first mounting portions arranged at intervals in the circumferential direction on the outer wall of the wheel hub, a strip-shaped hole is opened on the wheel hub at the edge of the first mounting portion, and a plurality of mounting platforms corresponding to each of the strip-shaped holes are arranged in the inner cavity of the wheel hub;

[0006] The fan blade includes a fan blade body and a second mounting portion arranged at one end of the fan blade body, the second mounting portion includes a first bending surface and a second bending surface connected to each other, the second bending surface passes through the strip hole and is mounted on the mounting platform, so that the first bending surface and the first mounting portion are in contact with each other.

[0007] A fan blade assembly provided according to the first aspect of the utility model has at least the following beneficial effects: a plurality of first mounting portions are arranged at intervals in the circumferential direction of the outer wall of the hub, and a strip hole is opened on the hub at the edge of the first mounting portion, so that the fan blade can be connected to the first mounting portion of the hub through the second mounting portion. During installation, the fan blade can be installed on a mounting table arranged in the inner cavity of the hub after passing through the strip hole via the second bent surface, so that the first bent surface and the first mounting portion fit each other, thereby facilitating the determination of the installation position of the fan blade, simplifying the operation, ensuring the stability of the connection between the fan blade and the hub, and improving the installation efficiency.

[0008] According to some embodiments of the present invention, the first mounting portion is embedded relative to the outer peripheral surface of the hub to form a clamping edge abutting against the edge of the first bending surface, and the first bending surface is clamped in a recessed position enclosed by each of the clamping edges.

[0009] According to some embodiments of the present invention, the first bending surface and the recessed position are in a triangular shape, and the first bending surface is an arc surface, and the bending edge between the fan blade body and the first bending surface is an arc edge.

[0010] According to some embodiments of the present invention, the hub is integrally injection molded, and the fan blades are integrally injection molded.

[0011] According to some embodiments of the present invention, the mounting platform includes a plurality of connecting columns arranged circumferentially along the center of the hub and a protrusion disposed on the connecting columns, wherein the protrusion is used to limit the installation position of the second bending surface.

[0012] According to some embodiments of the present invention, the second bending surface is a plane perpendicular to the axial direction of the hub, and the heights of the connecting columns are the same.

[0013] According to some embodiments of the utility model, a plurality of positioning holes are provided on the second bending surface, the radius of the positioning holes is larger than the radius of the protrusion, and the protrusion passes through the positioning holes to position the fan blade and connect it to the hub.

[0014] According to some embodiments of the utility model, the connecting column is provided with a mounting hole passing through the raised portion, and the fan blade assembly also includes a fastener and a gasket. The fastener passes through the gasket and the positioning hole and is installed on the mounting hole to fix the position between the fan blade and the hub.

[0015] According to some embodiments of the present invention, the strip-shaped holes are arranged at intervals along the circumferential direction of the outer wall of the hub, and the strip-shaped holes and the mounting platform are in the same plane.

[0016] The fan according to the second embodiment of the utility model comprises a fan blade assembly and a motor according to the first embodiment, wherein the output shaft of the motor is connected to the hub, and the motor is used to drive the fan blade assembly to rotate.

[0017] A fan provided according to the second aspect of the utility model has at least the following beneficial effects: by arranging a fan blade assembly, a plurality of first mounting portions are arranged at intervals in the circumferential direction of the outer wall of the hub, and a strip hole is opened on the hub at the edge of the first mounting portion, so that the fan blade can be connected with the first mounting portion of the hub through the second mounting portion. During installation, the fan blade can be installed on a mounting table arranged in the inner cavity of the hub after passing through the strip hole via the second bent surface, so that the first bent surface and the first mounting portion fit each other, thereby facilitating the determination of the installation position of the fan blade, simplifying the operation, ensuring the stability of the connection between the fan blade and the hub, and improving the installation efficiency.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 A fan exploded schematic diagram provided for an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of a fan blade assembly provided in one embodiment of the utility model;

[0023] Figure 3 This is an exploded schematic diagram of a fan blade assembly provided in another embodiment of the utility model;

[0024] Figure 4 for Figure 3 A top view of the hub structure in FIG.

[0025] Figure 5 for Figure 3 A schematic structural diagram of the first mounting portion;

[0026] Figure 6 for Figure 3 Schematic diagram of the fan blade structure.

[0027] Figure markings: front mesh cover 10, fan blade assembly 20, motor 30, rear mesh cover 40, main housing 50, hub 100, first mounting portion 110, strip hole 120, mounting platform 130, clamping edge 111, recessed position 112, connecting column 131, protrusion 132, mounting hole 1311, fan blade 200, fan blade body 210, second mounting portion 220, first bending surface 221, second bending surface 222, positioning hole 2221, fastener 300, gasket 400. DETAILED DESCRIPTION

[0028] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0033] Reference Figure 2 and Figure 3 As shown, Figure 2 is a schematic diagram of the structure of a fan blade assembly 20 provided in one embodiment of the utility model. Figure 3In the exploded schematic diagram of the fan blade assembly 20, the fan blade assembly 20 includes: a hub 100, including a plurality of first mounting portions 110 circumferentially spaced on the outer wall of the hub 100, a strip hole 120 is opened on the hub 100 at the edge of the first mounting portion 110, and a plurality of mounting platforms 130 corresponding to each strip hole 120 are arranged in the inner cavity of the hub 100; a fan blade 200, including a fan blade body 210 and a second mounting portion 220 arranged at one end of the fan blade body 210, the second mounting portion 220 includes a first bending surface 221 and a second bending surface 222 connected to each other, the second bending surface 222 passes through the strip hole 120 and is installed on the mounting platform 130, so that the first bending surface 221 and the first mounting portion 110 are in contact with each other.

[0034] A plurality of first mounting portions 110 are arranged at intervals in the circumferential direction of the outer wall of the hub 100, and a strip hole 120 is opened on the hub 100 at the edge of the first mounting portion 110, so that the fan blade 200 can be connected with the first mounting portion 110 of the hub 100 through the second mounting portion 220. During installation, the fan blade 200 can be installed on the mounting platform 130 arranged in the inner cavity of the hub 100 after passing through the strip hole 120 via the second bending surface 222, so that the first bending surface 221 and the first mounting portion 110 fit each other, thereby facilitating the determination of the installation position of the fan blade 200, simplifying the operation, ensuring the stability of the connection between the fan blade 200 and the hub 100, and improving the installation efficiency.

[0035] It should be noted that by providing the mutually fitting first mounting portion 110 and the first bending surface 221, the installation between the fan blade 200 and the hub 100 is made more convenient and accurate. During the installation process, the workload of adjusting and calibrating the installation position between the second bending surface 222 and the mounting platform 130 can be reduced, simplifying the installation process and improving the installation efficiency.

[0036] Reference Figure 3 and Figure 5 As shown, according to some embodiments of the present invention, the first mounting portion 110 is embedded relative to the outer peripheral surface of the wheel hub 100 to form a clamping edge 111 abutting against the edge of the first bending surface 221 , and the first bending surface 221 is clamped in the recessed position 112 enclosed by each clamping edge 111 .

[0037] It should be noted that after the fan blade 200 is installed on the wheel hub 100, the clamping edge 111 formed by the first mounting portion 110 embedded relative to the outer peripheral surface of the wheel hub 100 abuts against or overlaps with the edge of the first bending surface 221, wherein each clamping edge 111 encloses a recessed position 112 on the first mounting portion 110, so that the first bending surface 221 will fit on the first mounting portion 110 and be clamped in the recessed position 112, thereby avoiding deformation of the wheel hub 100 due to temperature changes and ensuring a stable connection with the fan blade 200.

[0038] Reference Figure 3 , 5 As shown in FIG. 6 , according to some embodiments of the present invention, the first bending surface 221 and the recessed position 112 are in the shape of a triangle, and the first bending surface 221 is an arc surface, and the bending edge between the fan blade body 210 and the first bending surface 221 is an arc edge.

[0039] It should be noted that, by setting the first bending surface 221 and the recessed position 112 in a triangular shape, when the first bending surface 221 and the recessed position 112 are subjected to pressure and tension, the triangle can maintain the stability of the connection between the first bending surface 221 and the recessed position 112 and is not easily deformed. Further, the first bending surface 221 is set as an arc surface, and the bending edge between the fan blade body 210 and the first bending surface 221 is set as an arc edge to adapt to the overall shape of the hub 100, so that the blade and the hub 100 fit more closely, which can not only reduce airflow resistance and turbulence to optimize the aerodynamic performance of the fan blade assembly 20, but also help reduce the gap and looseness between the blade and the hub 100, thereby improving the stability of the fan blade assembly 20.

[0040] In some embodiments of the utility model, the wheel hub 100 is an integral injection molding structure, and the fan blade 200 is also an integral injection molding structure, which has deformation restoration performance and high structural stability. Moreover, when the wheel hub 100 is manufactured using the integral injection molding process, it is convenient to thermoplastically form the first mounting portion 110 of different shapes on the wheel hub 100, such as a triangle, rectangle or other suitable shape, and it is possible to thermoplastically form a first bending surface 221 and a second bending surface 222 of different bending angles on the fan blade 200, wherein the shape of the first bending surface 221 matches the shape of the first mounting portion 110, thereby optimizing aerodynamic performance and improving installation efficiency. Further, referring to Figures 2 to 4 As shown, in order to make the assembly structure of the wheel hub 100 more stable and firm, a plurality of reinforcing ribs (not marked in the figure) are arranged around the inner cavity of the wheel hub 100 , which can greatly enhance the structural strength and stability of the wheel hub 100 .

[0041] Reference Figure 3 and Figure 4 As shown, according to some embodiments of the present invention, the mounting platform 130 includes a plurality of connecting columns 131 arranged circumferentially along the center of the hub 100 and a protrusion 132 disposed on the connecting columns 131 , and the protrusion 132 is used to limit the installation position of the second bending surface 222 .

[0042] It should be noted that by arranging the connecting column 131 along the circumference of the center of the hub 100, the protrusion 132 is arranged on the connecting column 131. When the second bending surface 222 of the fan blade 200 passes through the strip hole 120, the connecting column 131 of the mounting platform 130 can be quickly positioned. At the same time, under the limiting effect of the protrusion 132, the installation position of the second bending surface 222 of the fan blade 200 can be better fixed, the operation is convenient and quick, and the installation efficiency of the fan blade 200 is improved.

[0043] Reference Figure 3 As shown, according to some embodiments of the present invention, the second bending surface 222 is a plane perpendicular to the axial direction of the hub 100 , and the heights of the connecting columns 131 are the same.

[0044] It should be noted that by setting the second bending surface 222 to be a plane perpendicular to the axial direction of the hub 100, and setting the heights of each connecting column 131 to be the same, it is ensured that the blade is inserted into the hub 100 for installation at a level, which facilitates the use of fasteners 300 such as screws or bolts for connection, further improving the structural strength and facilitating disassembly and assembly.

[0045] Reference Figure 3 As shown, according to some embodiments of the present invention, a plurality of positioning holes 2221 are provided on the second bending surface 222 , the radius of the positioning hole 2221 is larger than the radius of the protrusion 132 , and the protrusion 132 passes through the positioning hole 2221 to position and connect the fan blade 200 to the hub 100 .

[0046] It should be noted that, by opening a plurality of positioning holes 2221 on the second bending surface 222, the radius of the positioning hole 2221 is greater than the radius of the protrusion 132. Therefore, the connecting column 131 on the hub 100 can be quickly positioned so that it corresponds to the positioning hole 2221 on the second bending surface 222 of the fan blade 200, so that the fan blade 200 can be easily inserted into the connecting column 131 of the hub 100. The structure is simple and practical, the positioning is accurate, the operation is convenient and quick, and the installation efficiency of the fan blade 200 is improved.

[0047] Reference Figure 3 As shown, according to some embodiments of the present invention, the connecting column 131 is provided with a mounting hole 1311 that passes through the raised portion 132, and the fan blade assembly 20 also includes a fastener 300 and a gasket 400. The fastener 300 passes through the gasket 400 and the positioning hole 2221 and is installed on the mounting hole 1311 to fix the position between the fan blade 200 and the hub 100.

[0048] It should be noted that, by opening a mounting hole 1311 on the connecting column 131 that passes through the raised portion 132, the fan blade 200 is installed on the connecting column 131 by aligning the positioning holes 2221 of the second bending surface 222 with the raised portions 132 on the connecting column 131, and then the fan blade 200 is locked on the mounting platform 130 after the fastener 300 passes through the gasket 400 and the positioning hole 2221. By installing the gasket 400 under the fastener 300, the friction between the fastener 300 and the second bending surface 222 can be increased, thereby effectively preventing the fastener 300 from loosening, reducing vibration and noise. At the same time, the limiting effect of the raised portion 132 is used to fix the fan blade 200, thereby ensuring the connection strength between the fan blade 200 and the hub 100, and improving the safety performance of the fan blade assembly 20 during operation.

[0049] In some embodiments of the present invention, the fan blade 200 and the hub 100 can be connected by screws, bolts or other suitable fasteners 300, and the fasteners 300 and the gaskets 400 are arranged one by one. Figure 2 and Figure 3 As shown, each wind blade 200 and the hub 100 can be connected using three fasteners 300, which is firmly connected and easy to produce and assemble.

[0050] Reference Figure 3 and Figure 5 As shown, according to some embodiments of the present invention, the strip-shaped holes 120 are arranged at intervals along the circumferential direction of the outer wall of the hub 100 , and the strip-shaped holes 120 and the mounting platform 130 are in the same plane.

[0051] It should be noted that the strip holes 120 arranged at intervals along the circumferential direction of the outer wall of the hub 100 help balance the force distribution on the hub 100, reduce stress concentration, and thus improve the stability of the fan blade assembly 20, which can effectively prevent the fan blade 200 installed on the hub 100 from being deformed or damaged due to uneven force, thereby extending the service life of the fan blade assembly 20. In addition, the strip holes 120 and the mounting platform 130 are in the same plane, and the installation of the fan blade 200 can be more conveniently aligned with the strip holes 120 and fixed on the mounting platform 130, which reduces the adjustment time and complexity during the installation process and helps to improve the installation efficiency.

[0052] In some embodiments of the present invention, the number of the fan blades 200 matches the number of the first mounting parts 110, and the number of the fan blades 200 and the first mounting parts 110 can be multiple. For example, the number of the fan blades 200 can be three or more. Specifically, installing three fan blades 200 on the hub 100 can provide better balance, reduce vibration and noise, and help reduce additional friction and wear between the blades and the hub 100 caused by imbalance, thereby extending the service life of the fan blade assembly 20.

[0053] Reference Figure 1 As shown, the second aspect of the utility model provides a fan, comprising a blade assembly 20 and a motor 30 as described in the first aspect above, wherein the output shaft of the motor 30 is connected to the hub 100, and the motor 30 is used to drive the blade assembly 20 to rotate. Specifically, by arranging the blade assembly 20 on the fan, a plurality of first mounting portions 110 are arranged at intervals in the circumferential direction of the outer wall of the hub 100, and a strip hole 120 is opened on the hub 100 at the edge of the first mounting portion 110, so that the blade 200 can be matched and connected with the first mounting portion 110 of the hub 100 through the second mounting portion 220. During installation, the blade 200 can be installed on the mounting platform 130 arranged in the inner cavity of the hub 100 after the second bending surface 222 passes through the strip hole 120, so that the first bending surface 221 and the first mounting portion 110 fit each other, thereby facilitating the determination of the installation position of the blade 200, and the operation is simple, ensuring the stability of the connection between the blade 200 and the hub 100, and improving the installation efficiency.

[0054] It should be noted that the fan in the embodiment of the utility model further includes a front mesh cover 10, a rear mesh cover 40 and a main housing 50. During assembly, the motor 30 is installed in the main housing 50, the output shaft of the motor 30 passes through the rear mesh cover 40 and is connected to the fan blade assembly 20, the fan blade assembly 20 is installed on the base of the rear mesh cover 40, and the front mesh cover 10 can be connected and fixed to the rear mesh cover 40 by buckles, screws or other suitable methods. Further, the fan of this embodiment can be a wall fan, a floor fan, an exhaust fan, etc.

[0055] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A fan blade assembly, characterized in that: include: The wheel hub comprises a plurality of first mounting portions arranged at intervals in the circumferential direction on the outer wall of the wheel hub, a strip-shaped hole is opened on the wheel hub at the edge of the first mounting portion, and a plurality of mounting platforms corresponding to each of the strip-shaped holes are arranged in the inner cavity of the wheel hub; The fan blade includes a fan blade body and a second mounting portion arranged at one end of the fan blade body, the second mounting portion includes a first bending surface and a second bending surface connected to each other, the second bending surface passes through the strip hole and is mounted on the mounting platform, so that the first bending surface and the first mounting portion are in contact with each other.

2. The fan blade assembly according to claim 1, characterized in that: The first mounting portion is embedded relative to the outer peripheral surface of the hub to form a clamping edge abutting against the edge of the first bending surface, and the first bending surface is clamped in a recessed position surrounded by each of the clamping edges.

3. The fan blade assembly according to claim 2, characterized in that: The first bending surface and the recessed position are in a triangular shape, the first bending surface is an arc surface, and the bending edge between the fan blade body and the first bending surface is an arc edge.

4. The fan blade assembly according to claim 1, characterized in that: The wheel hub is integrally injection-molded, and the fan blades are integrally injection-molded.

5. The fan blade assembly according to claim 1, characterized in that: The mounting platform includes a plurality of connecting columns arranged circumferentially along the center of the hub and a protruding portion disposed on the connecting columns, wherein the protruding portion is used to limit the mounting position of the second bending surface.

6. The fan blade assembly according to claim 5, characterized in that: The second bending surface is a plane perpendicular to the axial direction of the hub, and the heights of the connecting columns are the same.

7. The fan blade assembly according to claim 5, characterized in that: The second bending surface is provided with a plurality of positioning holes, the radius of the positioning holes is greater than the radius of the protruding portion, and the protruding portion passes through the positioning holes, so that the fan blade is positioned and connected to the hub.

8. The fan blade assembly according to claim 7, characterized in that: The connecting column is provided with a mounting hole penetrating through the raised portion, and the fan blade assembly further comprises a fastener and a gasket. The fastener passes through the gasket and the positioning hole and is installed on the mounting hole to fix the position between the fan blade and the hub.

9. The fan blade assembly according to claim 1, characterized in that: The strip-shaped holes are arranged at intervals along the circumferential direction of the outer wall of the hub, and the strip-shaped holes and the mounting platform are in the same plane.

10. A fan, characterized in that: It comprises a fan blade assembly and a motor as described in any one of claims 1 to 9, wherein the output shaft of the motor is connected to the hub, and the motor is used to drive the fan blade assembly to rotate.

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