Motor heat dissipation structure and drone

Abstract

The present invention discloses a motor heat dissipation structure and an unmanned aerial vehicle (UAV). The motor heat dissipation structure includes a front cover, which is mounted on the motor's rotating shaft and can rotate with the rotating shaft; and a channel between the stator and rotor within the motor housing. The front cover includes an inner mounting seat, an outer ring, and a plurality of guide ribs, which are distributed between the inner mounting seat and the outer ring in a high-low pattern. The outer ring is provided with a plurality of side air outlets. The heat dissipation structure, which is composed of the channel between the stator and rotor within the motor housing and the special guide ribs, can quickly remove heat from the motor body to the air, thereby reducing the temperature of the motor body. At the same time, the guide ribs on the front cover are lightweight, which increases the payload of the UAV.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation structures, and in particular to a motor heat dissipation structure and an unmanned aerial vehicle (UAV). Background Art

[0002] Existing motors face many heat dissipation problems. Either the heat dissipation efficiency is low and cannot support the continuous operation of high-density power motors; or the heat dissipation efficiency is high but the structure is complex, resulting in a large mass and a reduction in the effective load of the drone, etc. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide a motor heat dissipation structure and a drone. The heat dissipation structure is composed of a channel between the stator and the rotor in the motor housing and special guide ribs, which can quickly carry away the heat of the motor body with the air, thereby reducing the temperature of the motor body; at the same time, the guide rib structure on the front cover is lightweight, which increases the effective load capacity of the drone.

[0004] The present invention provides a technical solution to solve the above-mentioned problem: a motor heat dissipation structure, including a front cover, which is mounted on the rotating shaft of the motor and can rotate with the rotating shaft; and also includes a channel between the stator and the rotor in the motor housing, the front cover including an inner mounting seat, an outer ring and a plurality of guide ribs, the plurality of guide ribs are distributed between the inner mounting seat and the outer ring in a high and low pattern, and the outer ring is provided with a plurality of side air outlets.

[0005] Preferably, the guide ribs are radially distributed around the outer circumferential surface of the inner mounting seat.

[0006] Preferably, the plurality of side air outlets are evenly spaced and distributed on the outer ring.

[0007] Preferably, the positions of the side air outlets correspond one-to-one to the positions of the lower guide ribs.

[0008] Preferably, an air flow channel is formed between the higher guide rib and the coil of the motor.

[0009] Preferably, the channel includes a gap between the iron core and the magnet and a gap between the coils.

[0010] Preferably, the inner mounting seat is circular.

[0011] Preferably, the upper end surface of the inner mounting seat is provided with a plurality of anti-slip protrusions.

[0012] The present invention also discloses an unmanned aerial vehicle (UAV), comprising a motor heat dissipation structure as described in any one of the above.

[0013] Compared with the existing technology, the advantages of the present invention are: the heat dissipation structure composed of the channel between the stator and the rotor in the motor housing and the special guide ribs can quickly carry away the heat of the motor body with the air, thereby reducing the temperature of the motor body; at the same time, the guide rib structure on the front cover is lightweight, which increases the effective load capacity of the drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 is a top view of the present invention;

[0017] Figure 3 yes Figure 2 AA section view in;

[0018] Figure 4 1. It is a schematic diagram of the three-dimensional structure of the front cover;

[0019] Figure 5 It is a schematic diagram of gas flow;

[0020] Figure 6 It is a schematic diagram of gas flow;

[0021] Figure 7 is the motor air velocity vector diagram;

[0022] Figure 8 is the motor air velocity vector diagram;

[0023] Figure 9 This is the temperature distribution cloud diagram of the motor after adopting the heat dissipation structure;

[0024] Figure 10 This is the temperature distribution cloud diagram of the coil after adopting the heat dissipation structure;

[0025] Figure 11 It is the temperature distribution cloud diagram of the existing motor;

[0026] Figure 12 It is the temperature distribution cloud diagram of the existing coil.

[0027] The attached figure is marked with: 1. rotating shaft, 2. anti-slip protrusion, 3. inner mounting seat, 4. side air outlet, 5. guide rib, 6. outer ring, 7. coil, 8. air flow channel, 9. motor housing. DETAILED DESCRIPTION

[0028] The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 scope of protection of the present invention.

[0030] 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. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. Throughout the description of the present invention, "several" means two or more, unless otherwise specifically defined.

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

[0032] Example 1

[0033] A motor heat dissipation structure includes a front cover, which is mounted on the motor's rotating shaft 1 and can rotate with the rotating shaft 1; it also includes a channel between the stator and the rotor provided in the motor housing 9, the front cover includes an inner mounting seat 3, an outer ring 6 and a plurality of guide ribs 5, the plurality of guide ribs 5 are distributed between the inner mounting seat 3 and the outer ring 6 in a high-low arrangement (one is higher and the other is lower between two adjacent guide ribs, that is, the lower part of the lower guide rib is lower than the lower part of the higher guide rib), and the outer ring 6 is provided with a plurality of side air outlets 4.

[0034] In the above scheme, the heat dissipation structure composed of the channel between the stator and the rotor in the motor housing and the special guide ribs can quickly carry away the heat of the motor body with the air, thereby reducing the temperature of the motor body; at the same time, the guide rib structure on the front cover is lightweight, which increases the effective load capacity of the drone.

[0035] Among them, such as Figure 3 and Figure 4 As shown, the guide ribs 5 are radially distributed around the outer circumference of the inner mounting seat 3 .

[0036] In this embodiment, the plurality of side air outlets 4 are evenly spaced and distributed on the outer ring 6 .

[0037] Furthermore, the positions of the side air outlets 4 correspond one-to-one to the positions of the lower guide ribs 5 , and an air flow channel 8 is formed between the higher guide ribs 5 and the coils 7 of the motor.

[0038] In the above scheme, the airflow will flow from the lower part of the higher guide rib into the opening area on the other side due to the obstruction of the coil. This part of the airflow will exchange heat with the upper part of the coil. Under the action of the lower guide rib, the heat will be discharged from the side air outlet of the outer ring. Specifically, the channel includes the gap between the iron core and the magnet and the gap between the coils 7 and 7. It should be noted that the above channel is a channel provided by the motor itself and does not require additional design and processing.

[0039] In this embodiment, the inner mounting seat 3 is circular. Furthermore, a plurality of anti-slip protrusions 2 are provided on the upper end surface of the inner mounting seat 3. The specific shape of the inner mounting seat can be modified as needed. By providing a plurality of anti-slip protrusions 2 on the upper end surface of the inner mounting seat 3, the inner mounting seat can be used as a propeller seat, facilitating the installation of propeller blades.

[0040] Specifically, the motor of this embodiment is composed of an outer rotor and an inner stator of the motor. The rotor includes a steel ring, a magnet, a front cover and screws; the stator includes a motor shaft, a base, an iron core, a coil, a bearing, etc.; the gap between the stator and the rotor and the air vents on the top and sides of the front cover form an air circulation channel. After the motor rotor rotates at high speed, the air with a lower temperature outside the motor can spirally flow from bottom to top in the motor housing under the action of the guide ribs of the front cover, absorb heat from the stator, and the air with increased temperature is discharged from the side air outlet of the outer ring. The front cover is provided with guide ribs, which are distributed in high and low patterns. When the motor rotates at high speed, the air enters the channel from the top of the higher guide rib and reaches the bottom of the lower guide rib. After the air exchanges heat with the stator coil, the air with increased temperature is discharged through the side air outlet of the outer ring, thereby achieving the effect of reducing the temperature of the motor.

[0041] The specific airflow in this implementation is as follows:

[0042] The motor shaft rotates at high speed, and the airflow is guided by the higher guide ribs on the front cover. A part of the airflow goes down through the gap between the coils, and the heat there is discharged from the bottom of the motor (such as Figure 5 As shown); part of the airflow will flow from the lower part of the higher guide rib into the opening area on the other side due to the obstruction of the coil. This part of the airflow will exchange heat with the upper part of the coil. Under the action of the lower guide rib, the heat will be discharged from the side air outlet of the outer ring; another part of the airflow will be discharged directly from the side air outlet of the outer ring. The speed of this part of the airflow is relatively large, thus forming an air pressure difference between the upper and lower parts of the motor, causing the airflow in the gap between the iron core and the magnet to spiral upward from bottom to top (as shown Figure 6 As shown), the heat between the core and the magnet is carried to the side air outlet of the outer ring for discharge. This flow field channel makes full use of the gaps between the various parts of the motor, allowing the air and the coil to exchange heat efficiently and quickly discharge the heat from the motor. Without increasing the weight of the motor, it significantly improves the heat dissipation capacity of the motor (as shown). Figure 9 and Figure 10 As shown), it ensures the normal and stable operation of the motor.

[0043] It should be noted that the temperature distribution cloud diagram of the existing motor is as follows: Figure 11 and Figure 12 As shown, by comparing the temperature distribution cloud diagram after adopting the heat dissipation structure in this embodiment, it can be found that the temperature of the motor after adopting the heat dissipation structure in this embodiment is greatly reduced.

[0044] Example 2

[0045] This embodiment discloses a drone, including a motor heat dissipation structure as described in Example 1.

[0046] It should be noted that the remaining structural components of the drone in this embodiment belong to the existing technology, and those skilled in the art can design them as needed, so they will not be described in detail in this embodiment.

[0047] The above description is merely a description of the preferred embodiment of the present invention and is not to be construed as limiting the scope of the claims. The present invention is not limited to the above embodiment, and variations in the specific structure are permitted. Any variations within the scope of the independent claims of the present invention are also within the scope of protection of the present invention.

Claims

1. A motor heat dissipation structure, comprising a front cover, wherein the front cover is mounted on a rotating shaft (1) of the motor and can rotate along with the rotating shaft (1); characterized in that: The motor further comprises a passage between the stator and the rotor in the motor housing (9), the front cover comprising an inner mounting seat (3), an outer ring (6) and a plurality of flow guide ribs (5), the front cover being an integral structure, the plurality of flow guide ribs (5) being connected between the inner mounting seat (3) and the outer ring (6) in a high-low alternating manner, and the outer ring (6) being provided with a plurality of side air outlets (4).

2. The motor heat dissipation structure according to claim 1, characterized in that: The guide ribs (5) are radially distributed around the outer circumferential surface of the inner mounting seat (3).

3. The motor heat dissipation structure according to claim 1, characterized in that: The plurality of side air outlets (4) are evenly spaced and distributed on the outer ring (6).

4. The motor heat dissipation structure according to claim 3, characterized in that: The positions of the side air outlets (4) correspond one to one with the positions of the lower guide ribs (5).

5. The motor heat dissipation structure according to claim 1, characterized in that: An air flow channel (8) is formed between the higher guide rib (5) and the coil (7) of the motor.

6. The motor heat dissipation structure according to claim 1, characterized in that: The channel includes a gap between the iron core and the magnet and a gap between the coils (7) and the coils (7).

7. The motor heat dissipation structure according to claim 1, characterized in that: The inner mounting seat (3) is circular.

8. The motor heat dissipation structure according to claim 1, characterized in that: The upper end surface of the inner mounting seat (3) is provided with a plurality of anti-slip protrusions (2).

9. A drone, characterized by: It comprises a motor heat dissipation structure as described in any one of claims 1-8.

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