Fan blade

Abstract

The utility model discloses a fan blade which is characterized in that the fan blade comprises a fan blade body and a motor connector, the motor connector is connected and fixed to the middle of the fan blade body and comprises a metal core part and a plastic base wrapped outside the metal core part, and the metal core part is provided with a shaft hole allowing a motor rotating shaft to be inserted therein. The rotating shaft of the motor is inserted into the shaft hole of the metal core piece and can drive the whole plastic base to rotate through the motor after being fixed, and therefore the purpose of driving the fan blade body to rotate is achieved. The utility model has good stability, is convenient to produce and process, and can reduce wind noise and electromagnetic noise.

Description

Technical Field

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

[0002] Electric fan is also called fan or fan. It is a household appliance that uses an electric motor to drive the blades to rotate to accelerate the circulation of air. It is mainly used for cooling and circulating air. It is widely used in homes, offices, shops, hospitals, hotels and other places. Floor fans are mainly composed of fan heads, blades, mesh covers, poles, bases and control devices. The poles are fixed on the base, the blades are installed on the fan head, and the mesh covers are set outside the blades. The fan head generally includes a motor, a motor cover, blades, a wind net and a shaking air supply mechanism. The motor drives the blades to operate. Common blades are mainly plastic blades and metal blades. Generally, plastic blades are more commonly used in low-power electric fans, while electric fans with metal blades generally have larger power. For example, the Chinese patent authorization announcement number is CN217233832U, which discloses a flexible and adjustable industrial floor fan, characterized in that it includes: a base, a support rod is fixedly provided on the upper end of the base, a sleeve ring is movably connected to the outside of the support rod, an adjustment mechanism is fixedly provided on the outside of the sleeve ring, a motor box is fixedly provided on the upper end of the support rod, a fixed frame is fixedly installed on the right side of the motor box, a fan blade is movably installed on the right side of the motor box, and a rotating shaft is fixedly provided inside the motor box. The fan blade part of this patent structure is mainly formed by stamping metal plates. In order to save materials, it is made relatively thin. In order to improve the stability of the fan blades, it is often used to stamp out reinforcing ribs on the fan blades; but the fan blades of this structure have a certain wind resistance during high-speed rotation, so the wind noise is relatively large; in addition, the fan blade part is integrally installed on the rotating shaft of the motor, so after the motor reaches a certain speed, resonance may occur between the fan blade and the motor, emitting harsh electromagnetic noise, which brings trouble to the user. For this reason, it is necessary to further improve the existing technology. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the prior art and to provide a fan blade which is stable and reliable and can reduce wind noise and electromagnetic noise.

[0004] The utility model adopts the following technical solutions to achieve the above-mentioned purpose: a fan blade, characterized in that it includes a blade body and a motor connector, the motor connector is connected and fixed to the middle part of the blade body, the motor connector includes a metal core and a plastic base coated on the outside of the metal core, the metal core is provided with an axial hole for accommodating the insertion of the motor shaft, the motor shaft is inserted into the axial hole of the metal core, and after being fixed, the plastic base can be driven to rotate as a whole by the motor, thereby achieving the purpose of driving the blade body to rotate.

[0005] As a further illustration of the above solution, the fan blade body includes a fan blade mounting plate and a plurality of fan blades. The plurality of fan blades are respectively mounted on the fan blade mounting plate with the fan blade mounting plate as the center.

[0006] Furthermore, the fan blade mounting plate includes a circular plate portion located in the center and a plurality of bent connecting plates arranged along the edge of the circular plate portion, and the fan blades are fixed to the bent connecting plates by fasteners.

[0007] Furthermore, the bent connecting plate bends and extends inwards to form a Z-shaped structure with the circular plate portion.

[0008] Furthermore, a cut surface is provided on the side of the metal core, and the plastic base is connected to the metal core as a whole through injection molding.

[0009] Furthermore, the motor connector is T-shaped as a whole, one end of which is connected to the fan blade body, and the other end is sleeved on the motor shaft.

[0010] Furthermore, the fan blade is a blade with a certain curvature, so that the overall bending strength of the fan blade is enhanced, and there is no need to punch additional reinforcing ribs.

[0011] The beneficial effects that can be achieved by the utility model using the above technical solution are:

[0012] 1. The utility model adopts a fan blade structure which is mainly composed of a blade body and a motor connector, wherein the motor connector includes a metal core and a plastic base coated on the outside of the metal core, the metal core is provided with an axial hole for accommodating the insertion of the motor shaft, the motor shaft is inserted into the axial hole of the metal core, and after being fixed, the plastic base can be driven to rotate as a whole by the motor, thereby achieving the purpose of driving the blade body to rotate. Due to the setting of the metal core, the overall mechanical strength of the plastic base is higher and the service life is long; moreover, the contact between the plastic base and the blade body is soft contact, which can greatly reduce the probability of resonance between the blade and the motor and reduce electromagnetic noise.

[0013] 2. The utility model designs the fan blade to have a certain curvature, so that the overall bending strength of the fan blade is enhanced, and there is no need to punch reinforcement ribs separately. The structure is simpler, the wind resistance is smaller, and the wind noise is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the utility model;

[0016] Figure 3 This is a schematic diagram of the motor connector installation structure;

[0017] Figure 4 This is a schematic diagram of the motor connector structure.

[0018] Explanation of the accompanying drawings: 1. Fan blade body 1-1, fan blade mounting plate 1-2, fan blade 1-3, bent connecting plate 2, motor connecting head 2-1, metal core 2-11, shaft hole 2-2, plastic base. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the utility model, unless otherwise specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "below" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the height of the second feature. A first feature being "above", "below" and "below" a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the second feature.

[0023] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.

[0024] like Figure 1-Figure 4 As shown, the utility model is a fan blade, including a blade body 1 and a motor connector 2, wherein the blade body 1 is of metal structure and has high strength. The motor connector 2 is connected and fixed to the middle of the blade body 1. In this embodiment, the motor connector 2 includes a metal core 2-1 and a plastic base 2-2 coated on the outside of the metal core. The metal core 2-1 is provided with an axial hole 2-11 for inserting the motor shaft. After the motor shaft is inserted into the axial hole 2-11 of the metal core, the motor shaft and the motor connector are fixed by fasteners; finally, the plastic base can be driven to rotate as a whole by the motor, thereby achieving the purpose of driving the blade body to rotate. In order to make the metal core more integrated with the plastic base, a cut surface is provided on the side of the metal core, and the plastic base is connected to the metal core as a whole by injection molding.

[0025] The fan blade body 1 includes a fan blade mounting plate 1-1 and a plurality of fan blades 1-2. The plurality of fan blades are respectively mounted on the fan blade mounting plate with the fan blade mounting plate as the center. The fan blade mounting plate includes a circular plate portion located in the center and a plurality of bent connecting plates 1-3 arranged along the edge of the circular plate portion. The bent connecting plates are bent and extended inward to form a Z-shaped structure with the circular plate portion. The fan blades are fixed to the bent connecting plates by fasteners. In this embodiment, there are six bent connecting plates, and accordingly, there are also six fan blades.

[0026] The fan blade 1-2 is a blade with a certain curvature, so that the overall bending strength of the fan blade is enhanced, and there is no need to punch additional reinforcing ribs.

[0027] Compared with the prior art, the utility model divides the fan blade into two parts: the blade body and the motor connector. The motor connector includes a metal core and a plastic base coated on the outside of the metal core. The motor shaft is inserted into the shaft hole of the metal core. Due to the setting of the metal core, the overall mechanical strength of the plastic base is higher and the service life is long; moreover, the connection between the plastic base and the blade body is a soft contact, which can greatly reduce the probability of resonance between the blade and the motor and reduce electromagnetic noise; on the other hand, the blade of the blade body is also specially designed, and it is bent into an arched blade with a certain curvature, so that the overall bending strength of the fan blade is enhanced, and no additional punching reinforcement ribs are required, which can not only improve production efficiency, but also reduce wind noise.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A fan blade, characterized in that: It includes a fan blade body and a motor connector. The motor connector is connected and fixed to the middle part of the fan blade body. The motor connector includes a metal core and a plastic base covering the metal core. The metal core is provided with an axial hole for inserting a motor shaft. The motor shaft is inserted into the axial hole of the metal core.

2. A fan blade according to claim 1, characterized in that: The fan blade body comprises a fan blade mounting plate and a plurality of fan blades. The plurality of fan blades are respectively mounted on the fan blade mounting plate with the fan blade mounting plate as the center.

3. A fan blade according to claim 2, characterized in that: The fan blade mounting plate comprises a circular plate portion located in the center and a plurality of bent connecting plates arranged along the edge of the circular plate portion, and the fan blades are fixed on the bent connecting plates by fasteners.

4. A fan blade according to claim 3, characterized in that: The bent connecting plate bends and extends inwardly to form a Z-shaped structure with the circular plate portion.

5. A fan blade according to claim 1, characterized in that: The side of the metal core is provided with a cut surface, and the plastic base is connected with the metal core as a whole through injection molding.

6. A fan blade according to claim 1, characterized in that: The motor connector is T-shaped as a whole, with one end connected to the fan blade body and the other end sleeved on the motor shaft.

7. A fan blade according to claim 2, characterized in that: The fan blade is a blade with a curved curvature.

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