Axial flux motor heat dissipation structure and axial flux motor

Abstract

The utility model relates to a heat dissipation structure of an axial magnetic flux motor and the axial magnetic flux motor. The heat dissipation structure of the axial magnetic flux motor comprises a shell, a rotor and two stators, the shell is in a barrel shape, and the rotor and the two stators are arranged in the shell; the two stators are fixedly arranged at the two ends of the machine shell respectively. The two stators are respectively provided with two rotary connecting pieces, and the two ends of the rotor are respectively and rotatably arranged between the two stators through the two rotary connecting pieces; a plurality of heat dissipation holes are evenly formed in the machine shell in the circumferential direction of the machine shell, and the positions of the heat dissipation holes in the machine shell correspond to the position of the rotor in the machine shell. According to the motor, the heat dissipation holes are formed in the shell and correspond to the rotor in position, heat is directly and rapidly transmitted to the outside through the heat dissipation holes from a heating part, the heat dissipation holes are evenly distributed in the circumferential direction and form a uniform airflow path along with rotation of the rotor, the heat dissipation efficiency is improved, meanwhile, an auxiliary heat dissipation mode does not need to be added, and the heat dissipation efficiency is improved. The axial magnetic flux motor has a miniaturized structure, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an axial flux motor heat dissipation structure and an axial flux motor. BACKGROUND

[0002] The axial flux motor, especially the PCB (Printed Circuit Board) based axial flux motor, is a compact and efficient motor, which combines the flat structure of the axial flux motor and the PCB technology, so that it performs superior in power density, heat dissipation and manufacturing cost, and is suitable for applications with small size but large output torque, such as flexible hand motors in the robot industry, joint motors, unmanned aerial vehicle drive motors in the small unmanned aerial vehicle industry, and miniature motor applications in the high-end medical industry.

[0003] In the prior art, the PCB axial flux motor usually needs to be provided with an auxiliary cooling system such as a cooling fan to dissipate heat, but the additional auxiliary cooling system increases the product cost of the axial flux motor, and the overall structure of the product is more complex, which is not conducive to the miniaturization design of the PCB axial flux motor. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the present application provides an axial flux motor heat dissipation structure and an axial flux motor.

[0005] In a first aspect, the embodiments of the present application disclose an axial flux motor heat dissipation structure, comprising a shell, a rotor and two stators;

[0006] The shell is in the shape of a barrel, and the rotor and the two stators are arranged in the shell; the two stators are fixedly arranged at two ends of the shell; two rotating connecting pieces are arranged on the two stators respectively, and the two ends of the rotor are rotatably arranged between the two stators through the two rotating connecting pieces respectively;

[0007] A plurality of heat dissipation holes are uniformly arranged on the shell along the circumference of the shell, and the positions of the plurality of heat dissipation holes on the shell correspond to the positions of the rotor inside the shell.

[0008] In some possible embodiments, a plurality of heat dissipation holes are arranged on the shell;

[0009] The density of the heat dissipation holes close to the rotor is greater than the density of the heat dissipation holes far from the rotor.

[0010] In some possible embodiments, the diameter of the heat dissipation holes close to the rotor is greater than the diameter of the heat dissipation holes far from the rotor.

[0011] In some possible embodiments, the heat dissipation holes are spirally arranged along the circumference of the shell; the hole wall of the heat dissipation hole is arranged in an inclined manner, and the inclination angle is consistent with the spiral angle of the heat dissipation hole.

[0012] In some possible embodiments, the heat dissipation holes are in an oval or honeycomb shape.

[0013] In some possible embodiments, a dustproof screen is arranged on the heat dissipation holes, and the dustproof screen is detachably connected with the heat dissipation holes.

[0014] In some possible embodiments, a plurality of rows of heat dissipation holes are arranged on the casing; two adjacent rows of heat dissipation holes include first heat dissipation holes and second heat dissipation holes.

[0015] The edge of the first heat dissipation hole protrudes outward of the casing, and the diameter gradually decreases from the position close to the axis of the casing to the position away from the axis of the casing; the edge of the second heat dissipation hole protrudes inward of the casing, and the diameter gradually decreases from the position away from the axis of the casing to the position close to the axis of the casing.

[0016] In some possible embodiments, a mounting platform is arranged on the casing, the mounting platform is located at a middle position in the axis direction of the casing, and threaded connection holes are arranged on both sides of the mounting platform in the axis direction of the casing.

[0017] In some possible embodiments, lead-out grooves are further arranged on both sides of the mounting platform in the axis direction of the casing, and the lead-out grooves are located between the threaded connection holes and the mounting platform.

[0018] In a second aspect, the embodiments of the present application disclose an axial flux motor, comprising the axial flux motor heat dissipation structure according to any one of the preceding embodiments.

[0019] The technical scheme provided by the embodiments of the present application has the following technical effects:

[0020] The axial flux motor heat dissipation structure provided by the embodiments of the present application comprises a casing, a rotor and two stators; the casing is in a barrel shape, and the rotor and the two stators are arranged in the casing; the two stators are fixedly arranged at two ends of the casing; two rotating connecting members are arranged on the two stators respectively, and the two ends of the rotor are rotatably arranged between the two stators through the two rotating connecting members; a plurality of heat dissipation holes are uniformly arranged on the casing in the circumferential direction of the casing, and the positions of the plurality of heat dissipation holes in the casing correspond to the positions of the rotor inside the casing. In the embodiments of the present application, the heat dissipation holes are arranged on the casing for heat dissipation, the positions of the heat dissipation holes correspond to the positions of the rotor, heat is directly transferred from the heated rotor to the outside of the casing through the heat dissipation holes, heat accumulation is reduced, the uniformly distributed heat dissipation holes can form a uniform airflow path along with the rotation of the rotor, local overheating is avoided, the uniformity and efficiency of heat dissipation are improved, and at the same time, no additional heat dissipation mode is needed, so that the axial flux motor has a miniaturized structure and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions and advantages 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.

[0022] Figure 1 This is a schematic diagram of a heat dissipation structure for an axial flux motor provided in an embodiment of this application. Figure One ;

[0023] Figure 2 This is a schematic diagram of a heat dissipation structure for an axial flux motor provided in an embodiment of this application. Figure Two .

[0024] Figure label:

[0025] 1. Housing; 11. Heat dissipation holes; 12. Mounting platform; 13. Threaded connection holes; 14. Lead-out slot;

[0026] 2. Rotor; 3. Stator. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that the term "an embodiment" or "embodiment" in the specification of the embodiments of this application refers to a specific feature, structure, or characteristic that can be included in at least one implementation of this application. It should be understood that in the specification, claims, and accompanying drawings of the embodiments of this application, the terms "upper," "lower," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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 on this application. 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 indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, in the description of this embodiment, unless otherwise stated, "a plurality of" means two or more. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, or product that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0029] It should be understood that when a device or component is referred to as being "on," "adjacent to," or "connected to" other devices or components, it may be directly on, adjacent to, or connected to other devices or components, or there may be intervening devices or components. Conversely, when a device or component is referred to as being "directly on," "directly adjacent to," or "directly connected to" other devices or components, there are no intervening devices or components. It should be understood that although the terms first, second, third, etc., may be used to describe various components, areas, layers, and / or parts, these components, areas, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one component, area, layer, or part from another component, area, layer, or part. Therefore, without departing from the teachings of this application, the first component, area, layer, or part discussed below may be referred to as the second component, area, layer, or part. And the discussion of the second component, area, layer, or part does not imply that the first component, area, layer, or part necessarily exists in this application.

[0030] To make the objectives, technical solutions, and advantages disclosed in the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this application and are not intended to limit the embodiments of this application.

[0031] This application provides a heat dissipation structure for an axial flux motor. Figure 1 This is a schematic diagram of a heat dissipation structure for an axial flux motor provided in an embodiment of this application. Figure One , Figure 1 A cross-sectional view of the heat dissipation structure of an axial flux motor, as shown below. Figure 1 As shown, the heat dissipation structure of the axial flux motor includes a housing 1, a rotor 2 (not shown in the figure), and two stators 3 (not shown in the figure).

[0032] In the embodiments of this application, such as Figure 1 As shown, the housing 1 is cylindrical, and the rotor 2 and two stators 3 are disposed in the housing 1. The two stators 3 are fixedly disposed at both ends of the housing 1. Two rotating connecting parts, namely bearings, are disposed on the two stators 3 respectively. The two ends of the rotor 2 are rotatably disposed between the two stators 3 through the two rotating connecting parts.

[0033] In one possible embodiment, a plurality of heat dissipation holes 11 are uniformly provided on the housing 1 along the circumference of the housing 1, and the positions of the plurality of heat dissipation holes 11 on the housing 1 correspond to the positions of the rotor 2 inside the housing 1.

[0034] With the above configuration, heat dissipation holes 11 are opened on the housing 1 for heat dissipation. The position of the heat dissipation holes 11 corresponds to the position of the rotor 2, so that heat can be directly transferred from the heat-generating part to the outside through the heat dissipation holes 11 quickly, reducing heat accumulation. The heat dissipation holes 11, which are evenly distributed in the circumference, can form a uniform airflow path as the rotor 2 rotates, avoiding overheating in local areas and improving the uniformity and efficiency of heat dissipation. At the same time, there is no need to add auxiliary heat dissipation methods, which enables the axial flux motor to have a miniaturized structure and reduce costs.

[0035] In some possible embodiments, the housing 1 may be provided with multiple rings of heat dissipation holes 11. The design of multiple rings of heat dissipation holes 11 significantly increases the heat dissipation area of ​​the housing 1, which helps to transfer heat from the inside of the motor to the outside more quickly.

[0036] In this embodiment, the density of the heat dissipation holes 11 near the rotor 2 is greater than the density of the heat dissipation holes 11 away from the rotor 2. As the main heat source, the increased density of the heat dissipation holes 11 near the rotor 2 enables heat to be conducted from the heat-generating parts to the outside of the housing 1 more quickly and efficiently. For the parts away from the rotor 2, the lower density of the heat dissipation holes 11 can enhance the structural strength of the housing 1.

[0037] In some possible embodiments, the diameter of the heat dissipation holes 11 closer to the rotor 2 is larger than the diameter of the heat dissipation holes 11 farther from the rotor 2. Larger diameter heat dissipation holes 11 provide a larger air passage, enhancing air convection near the heat source and accelerating cooling. The area farther from the rotor 2 uses a smaller aperture design, satisfying heat dissipation requirements while retaining more material to enhance the strength of the housing 1.

[0038] Therefore, in this embodiment, the rotor 2 is positioned at the middle of the housing 1 along the axial direction. The heat dissipation holes 11 in the middle of the housing 1 have a high density and a large diameter, while the heat dissipation holes 11 at both ends of the housing 1 have a low density and a small diameter. The gradually distributed heat dissipation holes 11 also enhance the aesthetics of the housing 1.

[0039] In other possible embodiments, the heat dissipation holes 11 can also be arranged spirally along the circumference of the housing 1. This spiral arrangement of the heat dissipation holes 11 generates an air vortex along the axial direction of the housing 1 when the rotor 2 rotates, guiding external cool air into the interior while simultaneously expelling hot air, forming efficient convection and ensuring sufficient contact between the cool air and the rotating rotor 2. Furthermore, the spiral arrangement of the heat dissipation holes 11 ensures that air flows along a specific path during entry and exit, reducing noise caused by airflow turbulence, lowering pressure fluctuations in the airflow inside the housing 1, reducing vibration, and helping to maintain the smooth operation of the motor.

[0040] Meanwhile, the walls of the heat dissipation holes 11 are inclined, and the inclination angle is consistent with the spiral angle of the heat dissipation holes 11. The inclination of the hole walls and the consistency of the spiral angle allow the air entering the heat dissipation holes 11 to be naturally guided and flow smoothly along the spiral path. Moreover, the inclination of the hole walls changes the force direction at the edge of the heat dissipation holes 11. When the rotor 2 rotates, the cold air enters the interior of the housing 1 through the inclination of the heat dissipation holes 11, reducing the impact of airflow on the edge of the heat dissipation holes 11. This avoids local fatigue damage to the housing 1 caused by airflow impact or mechanical vibration, enhances the structural strength of the housing 1, and also reduces the noise caused by the vibration of the housing 1 caused by airflow impact.

[0041] In some possible embodiments, the heat dissipation hole 11 is elliptical or honeycomb shaped.

[0042] When the heat dissipation hole 11 is elliptical, the edges of the elliptical hole are smoother, reducing air resistance and effectively guiding airflow, thus improving airflow efficiency and heat dissipation. The shape of the elliptical hole avoids sharp corners, reducing the risk of stress concentration, and the material around the heat dissipation hole 11 is less prone to cracking or deformation. The airflow generates fewer eddies and turbulence when passing through the elliptical hole, also reducing airflow noise, making it particularly suitable for scenarios with high noise requirements.

[0043] Specifically, a honeycomb-shaped hole is a large hole composed of multiple adjacent hexagonal small holes. When the heat dissipation hole 11 is honeycomb-shaped, the honeycomb structure has a high space utilization rate, and the total area of ​​the heat dissipation holes 11 within the same area is large, enabling rapid heat exchange. Moreover, the polygonal structure of the honeycomb hole provides high strength support, and the casing 1 can maintain structural stability even under high temperature and vibration environments. The dense arrangement of the honeycomb holes and the tight connection between the small holes further enhance the overall rigidity of the casing 1, and to a certain extent compensate for the impact of the openings on the strength of the casing 1.

[0044] In this application, the housing 1 serves to protect the internal structure and prevent debris from entering the rotor 2. Therefore, in some possible embodiments, a dustproof mesh is provided on the heat dissipation holes 11. The dustproof mesh is used to improve the heat dissipation efficiency of the motor while preventing dust and other debris from entering the housing 1. The dustproof mesh can be made of metal materials such as stainless steel or aluminum alloy. Metal mesh provides strong protection and is suitable for high-temperature and high-load motor environments. Alternatively, it can be made of plastic materials such as nylon or polycarbonate. Plastic mesh is lightweight and wear-resistant, suitable for low-temperature and low-load applications, and both have good corrosion resistance and strength.

[0045] The aperture of the dust filter needs to be optimized according to the heat dissipation requirements of the axial flux motor. The aperture of the dust filter needs to facilitate airflow, but also needs to be small enough to prevent external debris such as dust, dirt, and droplets from entering the housing 1. The shape of the dust filter aperture can also be set as a honeycomb shape, providing better ventilation while ensuring structural strength.

[0046] In this embodiment, the dustproof mesh is detachably connected to the heat dissipation hole 11. The dustproof mesh can be connected to the heat dissipation hole 11 by bolts, or it can be directly snapped onto the wall of the heat dissipation hole 11. By making the dustproof mesh and the heat dissipation hole 11 detachably connected, it is convenient to clean and maintain the mesh in daily life, so as to ensure good ventilation.

[0047] In some possible embodiments, the housing 1 may be provided with multiple rings of heat dissipation holes 11. Two adjacent rings of heat dissipation holes 11 include a first heat dissipation hole 11 and a second heat dissipation hole 11. For the purposes of this application, the left heat dissipation hole 11 is the first heat dissipation hole 11, and the right heat dissipation hole 11 is the second heat dissipation hole 11.

[0048] The edge of the first heat dissipation hole 11 protrudes outward from the housing 1, and its diameter gradually decreases from near the axis of the housing 1 to away from the axis of the housing 1; while the edge of the second heat dissipation hole 11 protrudes inward from the housing 1, and its diameter gradually decreases from away from the axis of the housing 1 to near the axis of the housing 1.

[0049] When air enters the housing 1 through the second heat dissipation hole 11 on the right side, the diameter of the hole, which is larger at the beginning and smaller at the end, acts as a guide, effectively guiding the cold air into the housing 1. When air exits the housing 1 through the first heat dissipation hole 11 on the left side, the diameter of the hole, which is larger at the beginning and smaller at the end, also acts as a guide, effectively guiding the hot air out of the housing 1.

[0050] Figure 2 This is a schematic diagram of a heat dissipation structure for an axial flux motor provided in an embodiment of this application. Figure Two ,like Figure 2 As shown, in some possible embodiments, the housing 1 is provided with an installation platform 12, which is used to install conductive posts. The installation platform 12 is located at the middle position in the axial direction of the housing 1. Threaded connection holes 13 are provided on both sides of the installation platform 12 along the axial direction of the housing 1. The motor as a whole is connected to the client through the two threaded connection holes 13.

[0051] In some possible embodiments, the mounting platform 12 is further provided with lead-out slots 14 on both sides along the axial direction of the housing 1, and the lead-out slots 14 are located between the threaded connection hole 13 and the mounting platform 12. The lead-out slots 14 are the outlets for the three-phase leads of the motor, and the two lead-out slots 14 are respectively located on both sides of the mounting platform 12.

[0052] This application embodiment also provides an axial flux motor, which includes the above-described axial flux motor heat dissipation structure.

[0053] By incorporating a heat dissipation structure within the axial flux motor and creating heat dissipation holes on the housing, the heat dissipation holes are positioned corresponding to the rotor position. This allows heat to be quickly transferred directly from the heat-generating parts to the outside, reducing heat accumulation. The heat dissipation holes, evenly distributed circumferentially, create a uniform airflow path as the rotor rotates, preventing overheating in localized areas and improving the uniformity and efficiency of heat dissipation. Furthermore, no additional auxiliary heat dissipation methods are required, enabling the axial flux motor to achieve a miniaturized structure and reduced costs.

[0054] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0055] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0056] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0057] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat dissipation structure for an axial flux motor, characterized in that, It includes a housing (1), a rotor (2), and two stators (3); The housing (1) is cylindrical, and the rotor (2) and the two stators (3) are disposed in the housing (1); the two stators (3) are fixedly disposed at both ends of the housing (1); two rotating connecting parts are respectively disposed on the two stators (3), and the two ends of the rotor (2) are rotatably disposed between the two stators (3) through the two rotating connecting parts; The housing (1) is provided with a plurality of heat dissipation holes (11) evenly distributed along the circumference of the housing (1). The positions of the plurality of heat dissipation holes (11) on the housing (1) correspond to the positions of the rotor (2) inside the housing (1). The housing (1) is provided with multiple rings of heat dissipation holes (11). The density of the heat dissipation holes (11) near the rotor (2) is greater than the density of the heat dissipation holes (11) away from the rotor (2). The diameter of the heat dissipation holes (11) near the rotor (2) is greater than the diameter of the heat dissipation holes (11) away from the rotor (2). The heat dissipation hole (11) is spirally arranged along the circumference of the housing (1); the hole wall of the heat dissipation hole (11) is inclined, and the inclination angle is consistent with the spiral angle of the heat dissipation hole (11) to guide the air to flow along the spiral path.

2. The heat dissipation structure for the axial flux motor according to claim 1, characterized in that, The heat dissipation holes (11) are elliptical or honeycomb-shaped.

3. The heat dissipation structure for the axial flux motor according to claim 1, characterized in that, A dustproof mesh is provided on the heat dissipation hole (11), and the dustproof mesh is detachably connected to the heat dissipation hole (11).

4. The heat dissipation structure for an axial flux motor according to claim 1, characterized in that, The housing (1) is provided with multiple rings of heat dissipation holes (11); two adjacent rings of heat dissipation holes (11) include a first heat dissipation hole (11) and a second heat dissipation hole (11); The edge of the first heat dissipation hole (11) protrudes outward from the housing (1), and its diameter gradually decreases from near the axis of the housing (1) to away from the axis of the housing (1); the edge of the second heat dissipation hole (11) protrudes inward from the housing (1), and its diameter gradually decreases from away from the axis of the housing (1) to near the axis of the housing (1).

5. The heat dissipation structure for an axial flux motor according to claim 1, characterized in that, The housing (1) is provided with an installation platform (12), which is located at the middle position in the axial direction of the housing (1). The installation platform (12) is provided with threaded connection holes (13) on both sides along the axial direction of the housing (1).

6. The heat dissipation structure for an axial flux motor according to claim 5, characterized in that, The mounting platform (12) is also provided with lead-out grooves (14) on both sides along the axis of the housing (1), and the lead-out grooves (14) are located between the threaded connection hole (13) and the mounting platform (12).

7. An axial flux motor, characterized in that, It includes the heat dissipation structure for an axial flux motor as described in any one of claims 1-6.

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