Fan blade heat dissipation structure of external rotor motor

Abstract

The utility model discloses a fan blade heat dissipation structure of an external rotor motor. The fan blade heat dissipation structure comprises a rotor shell and a fan blade wheel, the rotor shell comprises a bottom wall and a side wall vertically extending from the edge of the bottom wall, and the bottom wall and the side wall jointly define a containing groove; a plurality of heat dissipation holes are formed in the bottom wall; the wind impeller is coaxially fixed to the side, away from the containing groove, of the rotor shell. According to the outer rotor motor fan blade heat dissipation structure provided by the utility model, the plurality of heat dissipation holes are formed in the bottom wall of the rotor shell, and the fan blade wheel is arranged on the outer side of the rotor shell, so that when the rotor shell rotates to drive the fan blade wheel to rotate, hot air in the accommodating groove is extracted through the heat dissipation holes; or external cold air is fed into the accommodating groove from the heat dissipation holes, so that the air convection rate in the accommodating groove is improved, the overall heat dissipation efficiency is improved, and the service life of the outer rotor motor is correspondingly prolonged.

Description

[Technical field]

[0001] The utility model relates to the technical field of external rotor motors, in particular to a fan blade heat dissipation structure of an external rotor motor. [Background technology]

[0002] The existing outer rotor brushless outer rotor motor operates by rotating the outer rotor casing. Since the outer rotor covers the inner stator and the outer rotor runs at high speed, the exhaust is not smooth, which makes the temperature of the outer rotor motor high during operation, especially the temperature of the inner stator is very high. Therefore, it is necessary to improve the heat dissipation efficiency of this type of brushless outer rotor motor.

[0003] In view of this, it is necessary to provide an outer rotor motor fan blade heat dissipation structure to overcome the above-mentioned defects. [Contents of the utility model]

[0004] The utility model aims to provide a heat dissipation structure of an outer rotor motor fan blade, aiming to improve the problem of high operating temperature of the outer rotor motor, improve the heat dissipation efficiency, and increase the service life of the outer rotor motor.

[0005] In order to achieve the above object, the utility model provides an outer rotor motor fan blade heat dissipation structure, comprising:

[0006] The rotor housing comprises a bottom wall and a side wall extending vertically from the edge of the bottom wall, wherein the bottom wall and the side wall are jointly arranged to form a receiving groove; the bottom wall is provided with a plurality of heat dissipation holes;

[0007] The wind impeller is coaxially fixed to a side of the rotor housing away from the receiving groove;

[0008] When the rotor housing rotates to drive the impeller to rotate, the impeller drives air from the outside to enter the receiving groove through the heat dissipation holes, or drives air from the receiving groove to the outside through the heat dissipation holes.

[0009] In a preferred embodiment, the wind impeller includes a fixing portion and a plurality of wind blades radially radiating from the fixing portion; the fixing portion is cylindrical and coaxially arranged on the bottom wall.

[0010] In a preferred embodiment, the plurality of fan blades are connected to the outer wall of the fixing portion at equal angles.

[0011] In a preferred embodiment, the wind impeller further includes a reinforcing rib ring; the reinforcing rib ring surrounds the fixing portion at intervals and connects the plurality of wind blades.

[0012] In a preferred embodiment, the heat dissipation holes are arranged in one-to-one correspondence with the fan blades.

[0013] In a preferred embodiment, the heat dissipation holes are circular holes, and the centers of all the heat dissipation holes are arranged to form a circle whose radius is greater than the radius of the reinforcing rib ring.

[0014] In a preferred embodiment, the cross-section of the fan blade along the axial direction is trapezoidal, and the thickness of the end away from the receiving groove is greater than the thickness of the end close to the receiving groove.

[0015] The outer rotor motor fan blade heat dissipation structure provided by the utility model has a plurality of heat dissipation holes on the bottom wall of the rotor shell and a fan wheel on the outer side of the rotor shell. When the rotor shell rotates to drive the fan wheel to rotate, the hot air in the receiving groove is extracted through the heat dissipation holes, or the external cold air is sent into the receiving groove from the heat dissipation holes, thereby improving the air convection rate in the receiving groove, thereby improving the overall heat dissipation efficiency and correspondingly improving the service life of the outer rotor motor.

Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A three-dimensional diagram of the heat dissipation structure of the fan blades of the outer rotor motor provided by the utility model;

[0018] Figure 2 for Figure 1 A side view of the heat dissipation structure of the fan blades of the outer rotor motor is shown.

[0019] Reference numeral 100 in the figure, heat dissipation structure of fan blades of an outer rotor motor;

[0020] 10. rotor housing; 11. bottom wall; 12. side wall; 13. heat dissipation hole;

[0021] 20. Coil stator;

[0022] 30. Impeller; 31. Fixed portion; 32. Fan blade; 33. Reinforcement ring. [Specific implementation method]

[0023] In order to make the purpose, technical solution and beneficial technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.

[0024] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0025] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0026] In an embodiment of the utility model, an outer rotor motor fan blade heat dissipation structure 100 is provided, which is used to dissipate heat and cool the outer rotor motor as a whole, improve the heat dissipation efficiency, and avoid excessive temperature.

[0027] like Figure 1 and Figure 2 As shown, the outer rotor motor fan blade heat dissipation structure 100 includes: a rotor housing 10 and a fan wheel 30 .

[0028] The rotor housing 10 is cylindrical, including a bottom wall 11 and a side wall 12 extending vertically from the edge of the bottom wall 11. The bottom wall 11 and the side wall 12 are together arranged to form a cylindrical receiving groove (not shown in the figure). The bottom wall 11 is provided with a plurality of heat dissipation holes 13, so that the receiving groove can be connected to the outside through the heat dissipation holes 13. The coil stator 20 of the outer rotor motor is accommodated in the receiving groove.

[0029] The impeller 30 includes a fixing portion 31 and a plurality of impellers 32 radially radiating from the fixing portion 31. In this embodiment, the plurality of impellers 32 are connected to the outer wall of the fixing portion 31 at equal angles.

[0030] Furthermore, the cross section of the fan blade 32 along the axial direction is trapezoidal, and the thickness of the end away from the receiving slot is greater than the thickness of the end close to the receiving slot, so as to facilitate better driving of air from the rear side to the front side of the fan wheel 30, or driving of air from the front side to the rear side. When the fan wheel 30 rotates, a unidirectional airflow is formed, thereby forming a pumping effect on the heat dissipation hole 13 arranged nearby, thereby driving air to flow through the heat dissipation hole 13 to improve the heat dissipation efficiency.

[0031] The heat dissipation holes 13 are arranged one by one with the fan blades 32. For example, if there are seven fan blades 32, the heat dissipation holes 13 can be arranged to be seven or more corresponding ones, so that each fan blade 32 can evenly drive the air flow in at least one heat dissipation hole 13 when rotating.

[0032] Furthermore, the fan wheel 30 further includes a reinforcing rib ring 33. The reinforcing rib ring 33 is annular, and its radius is greater than the radius of the fixing portion 31, so that the reinforcing rib ring 33 surrounds the fixing portion 31 at intervals and is coaxially arranged. The reinforcing rib ring 33 connects the plurality of fan blades 32, that is, the reinforcing rib ring 33 can be divided into multiple sections, each section connects adjacent fan blades 32, and the multiple sections are all on the same circle.

[0033] In this embodiment, the heat dissipation holes 13 are circular holes, and the centers of all the heat dissipation holes 13 are arranged to form a circle with a radius greater than the radius of the reinforcing rib ring 33, thereby preventing the reinforcing rib ring 33 from covering the space above the heat dissipation holes 13 when rotating, thereby affecting the exhaust and heat dissipation efficiency.

[0034] The outer rotor motor fan blade heat dissipation structure provided by the utility model has a plurality of heat dissipation holes 13 on the bottom wall 11 of the rotor housing 10 and a fan wheel 30 on the outer side of the rotor housing 10. When the rotor housing 10 rotates to drive the fan wheel 30 to rotate, the hot air in the receiving groove is extracted through the heat dissipation holes 13, or the external cold air is sent into the receiving groove from the heat dissipation holes 13, thereby improving the air convection rate in the receiving groove, thereby improving the overall heat dissipation efficiency, and correspondingly improving the service life of the outer rotor motor.

[0035] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. An outer rotor motor fan blade heat dissipation structure, characterized in that: include: Rotor housing; The rotor housing comprises a bottom wall and a side wall extending vertically from the edge of the bottom wall, wherein the bottom wall and the side wall are jointly arranged to form a receiving groove; the bottom wall is provided with a plurality of heat dissipation holes; Wind impeller; The impeller is coaxially fixed to a side of the rotor housing away from the receiving groove; When the rotor housing rotates to drive the impeller to rotate, the impeller drives air from the outside to enter the receiving groove through the heat dissipation holes, or drives air from the receiving groove to the outside through the heat dissipation holes.

2. The outer rotor motor fan blade heat dissipation structure according to claim 1, characterized in that: The wind impeller comprises a fixing portion and a plurality of wind blades radially radiating from the fixing portion; the fixing portion is cylindrical and coaxially arranged on the bottom wall.

3. The outer rotor motor fan blade heat dissipation structure according to claim 2, characterized in that: The plurality of fan blades are connected to the outer wall of the fixing portion at equal angles.

4. The outer rotor motor fan blade heat dissipation structure according to claim 3, characterized in that: The wind blade wheel also includes a reinforcing rib ring; the reinforcing rib ring surrounds the fixing portion at intervals and connects the multiple wind blades.

5. The outer rotor motor fan blade heat dissipation structure according to claim 1, characterized in that: The heat dissipation holes are arranged in one-to-one correspondence with the fan blades.

6. The outer rotor motor fan blade heat dissipation structure according to claim 4, characterized in that: The heat dissipation holes are circular holes, and the centers of all the heat dissipation holes are arranged to form a circle whose radius is greater than the radius of the reinforcing rib ring.

7. The outer rotor motor fan blade heat dissipation structure according to claim 1, characterized in that: The cross section of the fan blade along the axial direction is trapezoidal, and the thickness of the end away from the receiving groove is greater than the thickness of the end close to the receiving groove.

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