Fan structure

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a fan structure which comprises a base. The top of the base is connected with a fixed surface; a plurality of fan blades are evenly arranged on the outer wall of the fan cover in the circumferential direction, the fan cover partially sleeves the bottom of the base, a mounting cavity is formed between the fan cover and the bottom of the base, a direct current motor and a PCB are arranged in the mounting cavity, and the direct current motor is electrically connected with the PCB; one end of the direct-current motor is connected with the base, and the other end of the direct-current motor is connected with the fan cover. The direct-current motor is arranged to replace an alternating-current motor used on a traditional fan, the size and the weight are reduced, the requirements of current users for conciseness and light weight are better met, meanwhile, the internal structure is simple, and assembling is easy and convenient.

Description

Technical Field

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

[0002] Fans are very common in people's lives and are used a lot in summer. The fan blades are driven by a motor to make the air flow quickly, achieving the effect of blowing, thereby playing a role in cooling. Fans can be installed in many places, with a large blowing range and obvious cooling effect.

[0003] Most existing fan motors use AC motors, such as the fan with application number CN216342948U. AC motors are relatively large. Current fans are required to be small and not too bulky. At the same time, existing fan structures are relatively complex and inconvenient to produce and assemble. We urgently need to find a fan structure that is small in size and easy to assemble. Utility Model Content

[0004] The purpose of the present invention is to provide a fan structure, aiming to solve the technical problems in the prior art that the fan structure is large in size and difficult to assemble.

[0005] To achieve the above-mentioned objectives, an embodiment of the present invention provides a fan structure, including a base; the top of the base is used to connect to a fixed surface; a fan cover, a plurality of fan blades are evenly arranged on the outer wall of the fan cover in a circumferential direction, the fan cover is partially sleeved on the bottom of the base, and an installation cavity is formed between the fan cover and the bottom of the base, a DC motor and a PCB circuit board are provided inside the installation cavity, and the DC motor is electrically connected to the PCB circuit board; one end of the DC motor is connected to the base, and the other end is connected to the fan cover, and the DC motor drives the fan cover to rotate, thereby driving the fan blades to rotate and blow air.

[0006] Optionally, the base includes a connecting shaft; the connecting shaft extends downward to the mounting cavity and is connected to the mounting cavity, and the DC motor includes a rotor, a stator and a rotating shaft; the rotor is arranged inside the connecting shaft, the rotating shaft passes through the rotor, the stator is arranged on the outer wall of the connecting shaft, the stator is electrically connected to the PCB circuit board, and one end of the rotating shaft is connected to the fan cover.

[0007] Optionally, a connecting portion is provided at the bottom of the rotating shaft, a connecting cavity is provided at the bottom of the fan cover, and the connecting portion is provided in the connecting cavity.

[0008] Optionally, the connecting shaft is located at the center of the base, and a positioning protrusion is provided on the outer wall of the connecting shaft.

[0009] Optionally, each of the fan blades is arranged to be tilted downward, and each of the fan blades is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are distributed on the front and back sides of the fan blade.

[0010] Optionally, a plurality of fixing parts are provided on the top of the base, and each of the fixing parts is provided with a screw hole.

[0011] Optionally, a hook is provided on one of the fixing parts.

[0012] Optionally, a plurality of first ribs are provided at the connection between the connecting shaft and the base, and one end of each first rib is connected to the connecting shaft, and the other end is connected to the base.

[0013] Optionally, a plurality of second ribs are provided in the fan cover, and one end of each second rib is connected to the inner bottom surface of the fan cover, and the other end is connected to the inner side surface of the fan cover.

[0014] Optionally, a clamping groove is provided at one end of the rotating shaft, and a clamping piece is provided in the connecting shaft, and the clamping piece cooperates with the clamping groove to limit the rotating shaft.

[0015] Compared with the prior art, the above one or more technical solutions in the fan structure provided by the embodiment of the present invention have at least one of the following technical effects:

[0016] By installing a DC motor instead of the AC motor used in traditional fans, the volume and weight are reduced, which is more in line with the simplicity and lightweight needs of current users. At the same time, the internal structure is relatively simple and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of the present utility model.

[0019] Figure 2 This is a structural schematic diagram of the utility model from another angle.

[0020] Figure 3 It is a cross-sectional schematic diagram of the present invention.

[0021] Figure 4 It is a schematic diagram of the explosion structure of the utility model.

[0022] Among them, the reference numerals in the figures are:

[0023] 100, base; 110, connecting shaft; 111, positioning protrusion; 120, fixing portion; 121, screw hole; 130, hook; 140, first rib;

[0024] 200, fan cover; 210, fan blade; 211, reinforcing rib; 220, connecting cavity; 230, second rib;

[0025] 300, mounting cavity;

[0026] 410, rotor; 420, stator; 430, rotating shaft; 431, connecting portion; 432, snap-fit groove; 440, bearing;

[0027] 500. PCB circuit board. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0032] In one embodiment of the present invention, according to Figure 1-4 As shown, a fan structure includes a base 100; the top of the base 100 is used to connect to a fixed surface; a fan cover 200, and a plurality of fan blades 210 are evenly arranged on the outer wall of the fan cover 200 in a circumferential direction. The fan cover 200 is partially sleeved on the bottom of the base 100, and an installation cavity 300 is formed between the fan cover 200 and the bottom of the base 100. A DC motor and a PCB circuit board 500 are provided inside the installation cavity 300, and the DC motor is electrically connected to the PCB circuit board 500; one end of the DC motor is connected to the base 100, and the other end is connected to the fan cover 200. The DC motor drives the fan cover 200 to rotate, thereby driving the fan blades 210 to rotate and blow air.

[0033] Specifically, the DC motor is connected to the fan cover 200 and can drive it to rotate. The fan cover 200 is provided with fan blades 210, which can drive the fan blades 210 to rotate and blow air.

[0034] Furthermore, by providing a DC motor instead of the AC motor used in the traditional fan, the volume and weight are reduced, which is more in line with the simplicity and lightweight requirements of current users. At the same time, the internal structure is relatively simple and the assembly is easy.

[0035] In another embodiment of the present invention, according to Figure 3 As shown, the base 100 includes a connecting shaft 110; the connecting shaft 110 extends downward to the installation cavity 300 and is connected to the installation cavity 300, and the DC motor includes a rotor 410, a stator 420 and a rotating shaft 430; the rotor 410 is arranged inside the connecting shaft 110, the rotating shaft 430 is passed through the rotor 410, the stator 420 is arranged on the outer wall of the connecting shaft 110, the stator 420 is electrically connected to the PCB circuit board 500, and one end of the rotating shaft 430 is connected to the fan cover 200.

[0036] Specifically, through electromagnetic induction, when power is supplied to the external stator 420, it drives the internal rotor 410 to rotate, thereby driving the rotation shaft 430 to rotate. The rotation shaft 430 is connected to the center of the fan cover 200, driving the fan cover 200 to rotate, and further driving the fan blades 210 to rotate and blow air. Compared to the traditional structure where the base 100 and the motor are connected only by a connector, the structure of the present utility model is more stable and firm.

[0037] Furthermore, a bearing 440 is further provided in the connecting shaft 110, and the rotating shaft 430 passes through the bearing 440. The bearing 440 can play a role of supporting and reducing friction.

[0038] In another embodiment of the present invention, according to Figure 3 As shown, a connecting portion 431 is provided at the bottom of the rotating shaft 430, and a connecting cavity 220 is provided at the bottom of the fan cover 200, and the connecting portion 431 is provided in the connecting cavity 220. Specifically, a limiting member can be provided at the upper portion of the connecting cavity 220, which passes through the rotating shaft 430 and covers the opening of the connecting cavity 220, thereby limiting the connecting portion 431 in the connecting cavity 220. At the same time, the connecting portion 431 and the connecting cavity 220 can be connected by interference fit, or can be engaged by a rotating member, so that the fan cover 200 and the connecting portion 431 rotate together.

[0039] Furthermore, the connecting portion 431 and the connecting cavity 220 may be injection molded twice and rotated together.

[0040] In another embodiment of the present invention, according to Figure 3 and 4 As shown, the connection shaft 110 is located at the center of the base 100, and a positioning protrusion 111 is provided on the outer wall of the connection shaft 110. Specifically, the positioning protrusion 111 can facilitate positioning during assembly and perform rapid installation.

[0041] In another embodiment of the present invention, according to Figure 1-4 As shown, each fan blade 210 is tilted downward and is equipped with multiple reinforcing ribs 211, distributed on both the front and back surfaces of the fan blade 210. Specifically, the downward tilt of the fan blade 210 can better guide air flow and increase air intake. It also reduces noise and improves overall stability. Furthermore, the presence of reinforcing ribs 211 on both the front and back surfaces of the fan blade 210 increases its strength.

[0042] In another embodiment of the present invention, according to Figure 1As shown, the top of the base 100 is provided with a plurality of fixing parts 120, each of which is provided with a screw hole 121. A hook 130 is provided on one of the fixing parts 120. Specifically, the fixing part 120 is used to be mounted on a fixed surface. The hook 130 can be used for hanging and placing.

[0043] In another embodiment of the present invention, according to Figure 3 and 4 As shown, the connection between the connecting shaft 110 and the base 100 is provided with a plurality of first ribs 140. Each first rib 140 is connected to the connecting shaft 110 at one end and to the base 100 at the other end. A plurality of second ribs 230 are provided within the fan cover 200. Each second rib 230 is connected to the inner bottom surface of the fan cover 200 at one end and to the inner side surface of the fan cover 200 at the other end. Specifically, the primary function of the first ribs 140 and the second ribs 230 is to increase strength. Because fans are often made of plastic to reduce weight, which can be insufficient in strength during use, ribs or reinforcing ribs 211 are required to provide additional strength.

[0044] In another embodiment of the present invention, according to Figure 3 As shown, a clamping groove 432 is provided at one end of the rotating shaft 430, and a clamping member (not shown) is provided in the connecting shaft 110. The clamping member cooperates with the clamping groove 432 to limit the rotating shaft 430. Specifically, the clamping member is provided in the connecting shaft 110, mainly to limit the rotating shaft 430 and prevent the rotating shaft 430 from shifting.

[0045] The above description further details the present invention in conjunction with specific preferred embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. A person skilled in the art of the present invention will appreciate that its architecture is flexible and adaptable, allowing for the development of a series of products without departing from the present invention's concept. Simple deductions or substitutions should be considered within the scope of patent protection for the present invention as defined by the submitted claims.

Claims

1. A fan structure, characterized in that: It includes a base; the top of the base is used to connect to the fixing surface; A fan cover, wherein a plurality of fan blades are evenly arranged on the outer wall of the fan cover in the circumferential direction, the fan cover is partially sleeved on the bottom of the base, and an installation cavity is formed between the fan cover and the bottom of the base. A DC motor and a PCB circuit board are arranged inside the installation cavity, and the DC motor is electrically connected to the PCB circuit board; one end of the DC motor is connected to the base, and the other end is connected to the fan cover, and the DC motor drives the fan cover to rotate, thereby driving the fan blades to rotate and blow air.

2. The fan structure according to claim 1, characterized in that: The base includes a connecting shaft; the connecting shaft extends downward to the installation cavity and is connected to the installation cavity; the DC motor includes a rotor, a stator and a rotating shaft; the rotor is arranged inside the connecting shaft, the rotating shaft passes through the rotor, the stator is arranged on the outer wall of the connecting shaft, the stator is electrically connected to the PCB circuit board, and one end of the rotating shaft is connected to the fan cover.

3. The fan structure according to claim 2, characterized in that: A connecting portion is provided at the bottom of the rotating shaft, a connecting cavity is provided at the bottom of the fan cover, and the connecting portion is provided in the connecting cavity.

4. The fan structure according to claim 2, characterized in that: The connecting shaft is located at the center of the base, and a positioning protrusion is provided on the outer wall of the connecting shaft.

5. The fan structure according to claim 1, characterized in that: Each of the fan blades is arranged to be tilted downward, and each of the fan blades is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are distributed on the front and back sides of the fan blade.

6. The fan structure according to claim 1, characterized in that: A plurality of fixing parts are provided on the top of the base, and each fixing part is provided with a screw hole.

7. The fan structure according to claim 6, characterized in that: One of the fixing parts is provided with a hook.

8. The fan structure according to claim 2, characterized in that: A plurality of first ribs are provided at the connection between the connecting shaft and the base, and one end of each first rib is connected to the connecting shaft, and the other end is connected to the base.

9. The fan structure according to claim 1, characterized in that: A plurality of second ribs are provided in the fan cover, and one end of each second rib is connected to the inner bottom surface of the fan cover, and the other end is connected to the inner side surface of the fan cover.

10. The fan structure according to claim 2, characterized in that: A clamping groove is provided at one end of the rotating shaft, and a clamping piece is provided in the connecting shaft. The clamping piece cooperates with the clamping groove to limit the rotating shaft.

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