High-efficiency heat dissipation motor structure and unmanned aerial vehicle

Abstract

The utility model belongs to the unmanned aerial vehicle power motor structure technical field, specifically discloses a kind of motor structure and unmanned aerial vehicle of high efficiency heat dissipation, motor structure includes rotor assembly and stator assembly, rear cover is located in non-drive end and shell fixed, the middle section of stator base is set in rotating shaft, inside formation axial main air duct, lower outside formation air inlet slope, air inlet slope is towards drive end, and in axial direction it is located in main air duct, the upside of centrifugal fan forms top plate, downside forms fairing, fairing covers air gap in axial direction. Motor structure's stator base air inlet circumference is processed into air inlet slope, guide rear cover's air intake into main air duct, cooperate with the fairing of centrifugal fan setting in the top of motor outer rotating support, guide the flow of airflow, reduce the airflow of air gap and main air duct mutual interference, reduce the turbulence in motor, further improve motor air output, realize motor from air intake to air outlet integrated air duct high efficiency heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) power motor structure technology, specifically relating to a high-efficiency heat dissipation motor structure and an UAV. Background Technology

[0002] As the core of the drone's power system, the reliability, lifespan, efficiency, and weight of the motor are closely related to the overall performance of the drone.

[0003] The operating temperature of a motor has a significant impact on its performance. If the motor casing temperature is too high, accidental contact with the motor casing during aircraft landing can cause burns. Furthermore, high casing temperatures reduce the magnetic properties of the rotor magnets, affecting motor performance. Current technology typically uses motor fans for cooling; however, conventional motor structures are designed based on power performance, and the airflow created by the fan within the motor structure is often insufficient for efficient heat dissipation. Adding excessive cooling components to control motor temperature increases weight and cost, while also reducing power density. Prolonged operation at high temperatures also negatively impacts the overall lifespan and noise levels of the drone. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of insufficient heat dissipation performance of drone motors in the prior art, which leads to a decrease in power performance and lifespan, thereby providing a motor structure and drone with high-efficiency heat dissipation.

[0005] A high-efficiency heat dissipation motor structure includes a rotor assembly and a stator assembly, wherein the rotor assembly surrounds the stator assembly, and the stator assembly and the rotor assembly are connected by bearings.

[0006] The rotor assembly includes a centrifugal fan, a housing, and a rear cover; the centrifugal fan is located at the drive end and fixed to the shaft; the housing is fixed to the centrifugal fan, with a permanent magnet fixed inside, and surrounds the stator assembly; the rear cover is fixed to the housing.

[0007] The stator assembly includes a stator base, the middle section of which is sleeved on the rotating shaft, the stator core is fixed on the outer side, and the main air duct is formed on the inner side; an air intake ramp is formed on the lower outer side of the stator base, the air intake ramp faces the drive end and is located in the main air duct in the axial direction; stator windings are wound on the stator core.

[0008] An air gap is formed between the outer side of the middle section of the stator base and the inner side of the centrifugal fan;

[0009] The centrifugal fan has a rotating shaft mounting part in the middle, a top plate on the upper side, and a guide plate on the lower side. Multiple spokes extend axially from the outer side of the rotating shaft mounting part to the edge of the top plate. The spokes connect and fix the top plate and the guide plate. The guide plate has a ring structure, with its outer side flush with the outer side of the top plate, and covers the air gap axially.

[0010] Furthermore, the centrifugal fan's shaft mounting portion extends towards the non-drive end, with its outer side inclined to form an air outlet slope, which faces the non-drive end.

[0011] Furthermore, an inclined surface is formed on the upper outer side of the stator base, with the inclined surface facing the drive end.

[0012] Furthermore, the upper inner side of the middle section of the stator base is connected to the rotating shaft via a first bearing; the lower inner side of the middle section of the stator base is connected to the rotating shaft via a second bearing; and the lower outer side of the stator base is connected to the rear cover via a third bearing.

[0013] Furthermore, the centrifugal fan has twelve spokes, and the top plate, the spokes, and the guide plate work together to form twelve air outlets around the centrifugal fan.

[0014] Furthermore, the inner side of the stator base protrudes inward to form multiple parallel heat dissipation ribs, which are arranged axially.

[0015] A drone includes the aforementioned high-efficiency heat dissipation motor structure, which provides flight power for the drone.

[0016] Beneficial Effects: This utility model discloses a high-efficiency heat dissipation motor structure and a drone. The motor structure includes a rotor assembly and a stator assembly. The rear cover is located at the non-drive end and fixed to the outer shell. The middle section of the stator base is sleeved on the rotating shaft, forming an axial main air duct on the inner side and an air intake ramp on the lower outer side, facing the drive end and located axially within the main air duct. A top plate is formed on the upper side of the centrifugal fan, and a guide plate is formed on the lower side, covering the air gap axially. In this utility model, the stator base air inlet of the motor structure is circumferentially machined into an air intake ramp to guide the air intake of the rear cover into the main air duct. At the same time, the guide plate set on the centrifugal fan at the top of the motor's outer rotating bracket guides the airflow, reduces the mutual interference between the air coming out of the air gap and the airflow in the main air duct, reduces turbulence inside the motor, further increases the motor's air output, and achieves efficient heat dissipation of the motor from air intake to air exhaust through an integrated air duct. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the motor of this utility model;

[0019] Figure 2 This is a schematic diagram of the centrifugal fan structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the stator base structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the rear cover structure of this utility model;

[0022] Figure 5 This is a cross-sectional structural diagram of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Centrifugal fan; 11. Top plate; 12. Shaft mounting part; 13. Guide plate; 14. Spoke; 15. Air outlet slope; 16. Air outlet; 2. Outer shell; 3. Stator base; 31. Air inlet slope; 32. Main air duct; 4. Rear cover. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Reference Figures 1-5 As shown, this embodiment provides a motor structure with high-efficiency heat dissipation, including a rotor assembly and a stator assembly. The rotor assembly surrounds the stator assembly, and the stator assembly and the rotor assembly are connected by bearings.

[0029] The rotor assembly includes a centrifugal fan 1, a housing 2, and a rear cover 4; the centrifugal fan 1 is located at the drive end and is fixed to the shaft; the housing 2 is fixed to the centrifugal fan 1, with a permanent magnet fixed inside, and surrounds the stator assembly; the rear cover 4 is fixed to the housing 2 at the end of the motor away from the centrifugal fan.

[0030] The stator assembly includes a stator base 3, the middle section of which is sleeved on the rotating shaft, the stator core is fixed on the outer side, and the main air duct 32 is formed on the inner side; an air intake ramp 31 is formed on the lower outer side of the stator base 3, the air intake ramp 31 faces the drive end and is located in the main air duct 32 in the axial direction; stator windings are wound on the stator core.

[0031] An air gap is formed between the outer side of the middle section of the stator base 3 and the inner side of the centrifugal fan 1;

[0032] The centrifugal fan 1 has a rotating shaft mounting part 12 in the middle, a top plate 11 on the upper side, and a guide plate 13 on the lower side. Multiple spokes 14 extend axially from the outer side of the rotating shaft mounting part 12 to the edge of the top plate 11. The spokes 14 connect and fix the top plate 11 and the guide plate 13. The guide plate 13 has an annular structure, with its outer side flush with the outer side of the top plate 11, and covers the air gap axially.

[0033] In this embodiment, the shaft mounting portion 12 of the centrifugal fan 1 extends toward the non-driving end, and an air outlet slope 15 is formed on the outer side, with the air outlet slope 15 facing toward the non-driving end.

[0034] This embodiment optimizes the airflow design of the motor structure through the rear cover 4, the inlet ramp 31, the main air duct 32, the outlet ramp 15, and the guide plate 13, effectively improving heat dissipation capacity. Air enters through the rear cover 4 at the bottom, guided by the inlet ramp 31 formed on the outer side of the lower part of the stator base 3, and enters the main air duct 32 inside the stator base 3. Then, guided by the outlet ramp 15 formed by the shaft mounting part 12 of the centrifugal fan 1, it exits the motor structure through the centrifugal fan 1. Part of the intake air passes through the air gap and is guided by the guide plate 13 formed by the centrifugal fan 1, exiting the motor structure through the centrifugal fan 1. The guide plate 13 prevents the airflow from the main air duct 32 inside the stator base 3 from interfering with the airflow from the air gap, thus improving heat dissipation efficiency. Simultaneously, the outlet ramp 15 further optimizes the airflow duct, making the airflow from the centrifugal fan 1 smoother.

[0035] As a further improvement to this embodiment, an inclined surface is formed on the upper outer side of the stator base 3, with the inclined surface facing the drive end. The inclined surface formed on the upper outer side of the stator base 3 further optimizes the air outlet duct structure and improves heat dissipation performance.

[0036] Specifically, the upper inner side of the middle section of the stator base 3 is connected to the rotating shaft via a first bearing; the lower inner side of the middle section of the stator base 3 is connected to the rotating shaft via a second bearing; and the lower outer side of the stator base 3 is connected to the rear cover 4 via a third bearing.

[0037] In a preferred embodiment, the centrifugal fan 1 has twelve spokes 14, and the top plate 11, the spokes 14, and the guide plate 13 cooperate to form twelve air outlets 16 around the centrifugal fan 1.

[0038] In this embodiment, the inner side of the stator base 3 protrudes inward to form multiple parallel heat dissipation ribs. The heat dissipation ribs are arranged axially. The heat dissipation ribs formed in the main air duct 32 are conducive to carrying away the heat generated by the motor operation, and further optimize the heat dissipation performance.

[0039] This embodiment also provides a drone, including the aforementioned high-efficiency heat dissipation motor structure, which provides flight power for the drone.

[0040] This embodiment provides a high-efficiency heat dissipation motor structure and a drone. The motor structure includes a rotor assembly and a stator assembly. The rear cover 4 is located at the non-drive end and fixed to the outer shell 2. The middle section of the stator base 3 is sleeved on the shaft, forming an axial main air duct 32 on the inner side and an air intake ramp 31 on the lower outer side. The air intake ramp 31 faces the drive end and is located axially within the main air duct 32. A top plate 11 is formed on the upper side of the centrifugal fan 1, and a guide plate 13 is formed on the lower side, covering the air gap axially. In this invention, the stator base 3 of the motor structure has an air intake ramp 31 circumferentially machined to guide the air intake of the rear cover 4 into the main air duct 32. At the same time, the guide plate 13 set on the centrifugal fan 1 at the top of the motor's outer rotating bracket guides the airflow, reduces the mutual interference between the air coming out of the air gap and the airflow in the main air duct 32, reduces turbulence inside the motor, further increases the motor's air output, and achieves efficient heat dissipation of the motor from air intake to air exhaust through an integrated air duct.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-efficiency heat dissipation motor structure, comprising a rotor assembly and a stator assembly, wherein the rotor assembly surrounds the stator assembly, and the stator assembly and the rotor assembly are connected by bearings, characterized in that: The rotor assembly includes a centrifugal fan (1), a housing (2), and a rear cover (4); the centrifugal fan (1) is located at the drive end and is fixed to the rotating shaft; the housing (2) is fixed to the centrifugal fan (1), a permanent magnet is fixed inside, and the stator assembly is surrounded; the rear cover (4) is fixed to the housing (2); The stator assembly includes a stator base (3), the middle section of which is sleeved on the rotating shaft, the stator core is fixed on the outside, and the main air duct (32) is formed on the inside; an air intake ramp (31) is formed on the lower outer side of the stator base (3), the air intake ramp (31) faces the drive end and is located in the main air duct (32) in the axial direction; stator windings are wound on the stator core; An air gap is formed between the outer side of the middle section of the stator base (3) and the inner side of the centrifugal fan (1); The centrifugal fan (1) has a rotating shaft mounting part (12) in the middle, a top plate (11) on the upper side, and a guide plate (13) on the lower side. Multiple spokes (14) extend axially from the outer side of the rotating shaft mounting part (12) to the edge of the top plate (11). The spokes (14) connect and fix the top plate (11) and the guide plate (13). The guide plate (13) has an annular structure, with its outer side flush with the outer side of the top plate (11), and covers the air gap axially.

2. The high-efficiency heat dissipation motor structure according to claim 1, characterized in that, The shaft mounting portion (12) of the centrifugal fan (1) extends toward the non-drive end, and the outer side is inclined to form an air outlet slope (15), which faces the non-drive end.

3. The high-efficiency heat dissipation motor structure according to claim 1, characterized in that, The upper outer side of the stator base (3) forms an inclined surface, which faces the drive end.

4. The high-efficiency heat dissipation motor structure according to claim 1, characterized in that, The upper inner side of the middle section of the stator seat (3) is connected to the rotating shaft through a first bearing; the lower inner side of the middle section of the stator seat (3) is connected to the rotating shaft through a second bearing; the lower outer side of the stator seat (3) is connected to the rear cover (4) through a third bearing.

5. The high-efficiency heat dissipation motor structure according to claim 1, characterized in that, The centrifugal fan (1) has twelve spokes (14) formed on it, and the top plate (11), the spokes (14) and the guide plate (13) cooperate to form twelve air outlets (16) around the centrifugal fan (1).

6. The high-efficiency heat dissipation motor structure according to claim 1, characterized in that, The inner side of the stator base (3) protrudes inward to form multiple parallel heat dissipation ribs, which are arranged along the axial direction.

7. A drone, characterized in that, The invention includes a high-efficiency heat dissipation motor structure as described in any one of claims 1 to 6, wherein the motor structure provides flight power for the UAV.

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