Fan blade installation structure of outer rotor direct current brushless motor

Abstract

The utility model discloses a fan blade installation structure of an external rotor direct current brushless motor, which comprises a rotor shell and fan blades, each fan blade comprises a body and a blade, the blade is arranged on the body, the body is provided with a through hole, the rotor shell is positioned in the through hole, and the body is fixedly covered on the rotor shell. By directly covering and fixing the fan blades on the rotor shell, the situation that the fan blades are fixed on the rotating shaft in the prior art is replaced, and the rotating shaft in the motor does not need to extend out to be matched with the fan blades, so that the length of the whole motor is correspondingly reduced, the size of the whole motor is reduced, the requirement on the mounting space of the motor is reduced, and the motor is convenient to mount; and through the arrangement of the through holes, the matching of the fan blades and the rotor shell is facilitated.

Description

Technical Field

[0001] The utility model belongs to an important component of a motor, in particular to a fan blade installation structure of an outer rotor DC brushless motor. Background Art

[0002] When installing an existing brushless DC motor, the fan blades are usually installed on the rotating shaft. The two ends of the rotating shaft extend through the two ends of the housing, one end is used as the power output, and the other end is used to install the fan blades. For example, Application No. 201920658403.3 discloses a brushless DC motor with fan blades installed at the top of the rotating shaft, and Application No. 201720703296.2 discloses a brushless DC motor with fan blades installed at the end of the rotor shaft. In order to have enough installation positions for the fan blades and ensure the normal rotation of the fan blades, this type of motor needs to extend the rotating shaft at one end for installing the fan blades longer, thereby increasing the size of the entire motor. A larger installation position needs to be reserved on the home appliance to install the entire motor, which is inconvenient for installation of smaller home appliances. Utility Model Content

[0003] The utility model aims to provide a fan blade mounting structure of an outer rotor DC brushless motor capable of solving at least one of the above problems.

[0004] According to one aspect of the utility model, a fan blade mounting structure of an outer rotor DC brushless motor is provided, including a rotor housing and a fan blade, the fan blade including a body and blades, the blades are arranged on the body, the body is provided with a through hole, the rotor housing is located in the through hole, and the body cover is fixed to the rotor housing.

[0005] The beneficial effects of the utility model are as follows: by directly fixing the fan blade cover on the rotor housing, the fan blade is fixed on the rotating shaft instead of the prior art, and there is no need to extend the rotating shaft in the motor to cooperate with the fan blade, so that the length of the entire motor is correspondingly reduced, and the volume of the entire motor is reduced, thereby reducing the installation space requirement for the motor and facilitating installation; by providing a through hole, the cooperation between the fan blade and the rotor housing is facilitated.

[0006] In some embodiments, the body includes a vertical portion and a horizontal portion, the horizontal portion is provided at one end of the vertical portion, the through hole is located on the vertical portion, a limiting hole is provided on the horizontal portion, the aperture of the limiting hole is smaller than the outer diameter of the rotor housing, and the horizontal portion abuts against the end surface of the rotor housing. Thus, by providing the horizontal portion and the limiting hole, the installation position of the fan blade on the rotor housing can be limited.

[0007] In some embodiments, the blades are located at the outer periphery of the other end of the vertical portion, the blades are multiple, and the outer edge of the horizontal portion is flush with the outer edge of the vertical portion, thereby meeting different installation and use requirements.

[0008] In some embodiments, a connecting portion is provided on the periphery of the vertical portion, and the blade is connected to the vertical portion through the connecting portion, and the connecting portion is arranged horizontally, so that the blade is conveniently connected to the vertical portion through the connecting portion.

[0009] In some embodiments, the blades are arranged perpendicular to the connecting portion, so that when the blades rotate with the rotor housing, airflow is generated, air flow is accelerated, and heat dissipation is achieved.

[0010] In some embodiments, the outer edge of the horizontal portion is flush with the outer edge of the vertical portion, and the blades are arranged on the outer periphery of the vertical portion and below the vertical portion, thereby meeting different requirements of the fan blades.

[0011] In some embodiments, the blades are multiple, each blade is arc-shaped or vertically arranged, and the upper end surface of the blade is connected to the horizontal portion. Thus, the arc-shaped arrangement of the blades facilitates the formation of airflow when the blades rotate to achieve the heat dissipation function.

[0012] In some embodiments, the fan blade is an integrally formed structure, thereby facilitating the forming and processing of the fan blade.

[0013] In some embodiments, the connecting portion is provided with reinforcing ribs, and the fan blade is an integrally formed structure, thereby increasing the overall strength through the reinforcing ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic structural diagram of the fan blade installation structure of the outer rotor DC brushless motor.

[0015] Figure 2 The utility model is a schematic diagram of the structure of a fan blade in an embodiment of the fan blade installation structure of the outer rotor DC brushless motor.

[0016] Figure 3 It is a structural schematic diagram from another perspective of a fan blade in one embodiment of the fan blade installation structure of the outer rotor DC brushless motor of the utility model.

[0017] Figure 4 It is a schematic structural diagram of another embodiment of the fan blade installation structure of the outer rotor DC brushless motor of the utility model, in which the fan blade is reversed from the bottom.

[0018] Figure 5 The utility model is a schematic diagram of a structure in which the blades of the fan blade installation structure of the outer rotor DC brushless motor are upward. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Reference Figure 1 to Figure 4The fan blade installation structure of the outer rotor DC brushless motor includes a rotor housing 1 and a fan blade 2. The fan blade 2 includes a body 21 and blades 22. The blades 22 are arranged on the body 21. The body 21 is provided with a through hole 211. The rotor housing 1 is located in the through hole 211. The body 21 is covered and fixed on the rotor housing 1. The aperture of the through hole 211 is consistent with the outer diameter of the rotor housing 1. When the fan blade 2 is installed, the fan blade 2 is sleeved on the outer side of the rotor housing 1. In order to improve the tightness of the fan blade 2 on the rotor housing 1, the inner wall of the through hole 211 is fixed to the rotor housing 1 by gluing.

[0021] The body 21 includes a vertical portion 212 and a horizontal portion 213. The horizontal portion 213 is arranged at one end of the vertical portion 212. The through hole 211 is located on the vertical portion 212. A limiting hole 214 is arranged on the horizontal portion 213. The aperture of the limiting hole 214 is smaller than the outer diameter of the rotor housing 1. The horizontal portion 213 abuts against the end face of the rotor housing 1. Therefore, when the fan blade 2 is assembled on the rotor housing 1, the horizontal portion 213 is pressed against the corresponding end face of the rotor housing 1. Through the horizontal portion 213 and the limiting hole 214, the fan blade 2 can be prevented from being further inserted downward into the rotor housing 1, thereby limiting the installation position of the fan blade 2 on the rotor housing 1.

[0022] like Figure 2 and Figure 3 As shown, in one embodiment, the blade 22 is located at the outer periphery of the other end of the vertical portion 212 , the blade 22 is multiple, and the outer edge of the horizontal portion 213 is flush with the outer edge of the vertical portion 212 .

[0023] A connecting portion 23 is provided on the periphery of the vertical portion 212, and the blade 22 is connected to the vertical portion 212 via the connecting portion 23, and the connecting portion 23 is arranged horizontally. By providing the connecting portion 23, the processing of the blade 22 can be facilitated.

[0024] In actual use, the blade 22 and the connecting portion 23 are arranged vertically upward or vertically downward ( Figure 1 and Figure 5 The upward or downward direction of the blade 22 can be adjusted according to the actual position of the external ventilation hole.

[0025] In this embodiment, the fan blade 2 may be a metal sheet obtained by stamping; the connection portion 23 can facilitate stamping of each blade 22 .

[0026] In order to improve the strength of the fan blade 2, a reinforcing rib 231 is formed on the connecting portion 23, and the fan blade 2 is an integrally formed structure. Among them, the reinforcing rib 231 is formed by stamping the connecting portion 23 toward one side of the blade 22, which is beneficial to improving the strength of the fan blade.

[0027] like Figure 4As shown, in another embodiment, the outer edge of the horizontal portion 213 is flush with the outer edge of the vertical portion 212 , and the blades 22 are disposed on the outer periphery of the vertical portion 212 and are located below the vertical portion 212 .

[0028] There are multiple blades 22 , each blade 22 is arranged in an arc shape, and the upper end surface of the blade 22 is connected to the horizontal portion 213 .

[0029] The fan blade 2 is an integral injection-molded structure, that is, in this embodiment, the fan blade 2 is an injection-molded part, which facilitates the molding of the arc-shaped blade 22 .

[0030] In this embodiment, the lower end surface of the blade 22 is flush with the lower end surface of the vertical portion 212. Through the arc-shaped setting of the blade 22, when the fan blade 2 rotates with the rotor housing 1, the fan blade 2 rotates to form a vortex, accelerate the air flow, and achieve heat dissipation.

[0031] In the above embodiments, the fan blades 2 are directly fixed to the rotor housing 1, and the fan blades 2 are driven to rotate together by the rotor housing 1, thereby realizing the heat dissipation function. The fan blade mounting structure of the outer rotor DC brushless motor does not need to mount the fan blades 2 on the rotating shaft, which greatly shortens the length of the rotating shaft, helps to reduce the volume of the entire motor, thereby reducing the requirements for the motor installation space, and is easy to install.

[0032] The above are only preferred implementations of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. The fan blade mounting structure of the outer rotor DC brushless motor is characterized in that: The invention comprises a rotor housing (1) and a fan blade (2), wherein the fan blade (2) comprises a body (21) and a blade (22), wherein the blade (22) is arranged on the body (21), wherein the body (21) is provided with a through hole (211), wherein the rotor housing (1) is located in the through hole (211), and wherein the body (21) is covered and fixed on the rotor housing (1).

2. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 1, characterized in that: The body (21) comprises a vertical portion (212) and a horizontal portion (213); the horizontal portion (213) is arranged at one end of the vertical portion (212); the through hole (211) is located on the vertical portion (212); a limiting hole (214) is arranged on the horizontal portion (213); the aperture of the limiting hole (214) is smaller than the outer diameter of the rotor housing (1); and the horizontal portion (213) abuts against an end surface of the rotor housing (1).

3. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 2, characterized in that: The blades (22) are located at the outer periphery of the other end of the vertical portion (212), the blades (22) are multiple, and the outer edge of the horizontal portion (213) is flush with the outer edge of the vertical portion (212).

4. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 3, characterized in that: A connecting portion (23) is provided on the outer periphery of the vertical portion (212), and the blade (22) is connected to the vertical portion (212) via the connecting portion (23), and the connecting portion (23) is arranged horizontally.

5. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 4, characterized in that: The blades (22) and the connecting portion (23) are arranged perpendicularly.

6. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 2, characterized in that: The outer edge of the horizontal portion (213) is flush with the outer edge of the vertical portion (212), and the blades (22) are arranged on the outer periphery of the vertical portion (212) and are located below the vertical portion (212).

7. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 6, characterized in that: The blades (22) are multiple, each of the blades (22) is arc-shaped or vertically arranged, and the upper end surface of the blade (22) is connected to the horizontal part (213).

8. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 7, characterized in that: The fan blade (2) is an integrally formed structure.

9. The fan blade mounting structure of the outer rotor DC brushless motor according to claim 5, characterized in that: The connecting portion (23) is provided with a reinforcing rib (231), and the fan blade (2) is an integrally formed structure.

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