Rotor, electric machine and drive system

Abstract

The utility model discloses a rotor, motor and driving system relates to motor technical field, and the rotor includes annular main body and a plurality of permanent magnet, wherein, annular main body is provided with at least one hollow area, and the hollow area is provided with mesh structure, and the mesh structure includes a plurality of polygonal mesh that sets up in array and the triangular support structure that is located in polygonal mesh, and three angles of triangular support structure are fixed on the inner wall of polygonal mesh respectively, a plurality of permanent magnets set up in the inside of annular main body. The utility model provides technical scheme to construct the composite mesh structure of polygonal mesh and triangular support structure combination in the hollow area of annular main body, realize the lightweight of rotor at the same time, give consideration to high -efficient heat dissipation and excellent mechanical bearing performance, effectively solved the problem such as inertia redundancy, heat dissipation efficiency is limited and mechanical property is insufficient in traditional outer rotor motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a rotor, motor and drive system. Background Technology

[0002] Permanent magnet brushless motors are a type of motor that relies on permanent magnets to generate an excitation magnetic field and achieves commutation without mechanical brushes through electronic commutation. They have advantages such as high power density, high operating efficiency, and compact structure, and have gradually become one of the core power components in high-end equipment fields such as drones, robots, new energy vehicles, and aerospace.

[0003] Currently, the rotors of external rotor permanent magnet brushless motors typically employ a homogeneous solid structure. During operation, the heat generated by the permanent magnets on the rotor is transferred to the outer surface for dissipation. However, due to the dense distribution of the rotor material, the heat conduction path from the interior to the exterior is long and the thermal resistance is high, limiting heat dissipation efficiency and easily leading to areas of excessively high temperature on the back of the permanent magnets. When the temperature at this location exceeds the operating temperature range that the permanent magnet material can withstand, there is a risk of irreversible demagnetization, which adversely affects the motor's power density and long-term operational stability. Utility Model Content

[0004] The main purpose of this invention is to propose a rotor, motor and drive system that aims to solve the technical problems of rotor lightweighting, efficient heat dissipation and synergistic optimization of mechanical performance from a structural perspective.

[0005] To achieve the above objectives, this utility model proposes a rotor comprising: A ring-shaped body, wherein the ring-shaped body is provided with at least one hollow area, the hollow area is provided with a mesh structure, the mesh structure includes a plurality of polygonal meshes arranged in an array, and a triangular support structure provided within the polygonal meshes, wherein the three corners of the triangular support structure are respectively fixed to the inner wall of the polygonal meshes; Multiple permanent magnets are disposed on the inner side of the annular body.

[0006] In one embodiment, one corner of the triangular support structure is oriented toward the circumferential direction of the annular main body.

[0007] In one embodiment, the triangular support structure includes three support beams connected end to end in sequence, one of which is arranged along the axial direction of the annular main body, and the other two support beams extend along the circumferential direction of the annular main body and are arranged at an angle to the circumferential direction of the annular main body.

[0008] In one embodiment, the polygonal mesh is arranged in multiple rows, with adjacent rows of polygonal mesh staggered along the axial direction of the annular body, and each of the support beams arranged along the axial direction of the annular body in each row of polygonal mesh is collinear in that direction.

[0009] In one embodiment, the two supporting beams extending along the circumferential direction of the annular body are of equal length; and / or, All three support beams are of equal length.

[0010] In one embodiment, the polygonal mesh is a hexagonal mesh, and the three corners of the triangular support structure are respectively connected to the three corners of the hexagonal mesh that are spaced apart, so as to divide the hexagonal mesh into multiple triangular meshes.

[0011] In one embodiment, multiple hollow areas are provided, and the multiple hollow areas are distributed along the circumferential direction of the annular body. There is a gap between adjacent hollow areas to form a solid area on the annular body.

[0012] In one embodiment, the permanent magnet is positioned corresponding to the hollowed-out area.

[0013] This utility model also proposes an electric motor, including the aforementioned rotor.

[0014] This utility model also proposes a drive system, including the aforementioned motor.

[0015] The technical solution provided by this utility model involves setting at least one hollow area on the annular body, and within the hollow area, setting a composite mesh structure composed of multiple polygonal mesh holes arranged in an array and triangular support structures embedded in the polygonal mesh holes. On the one hand, the setting of the hollow area on the annular body forms a mesh structure, which effectively reduces the amount of material used in the rotor, significantly reduces the rotor mass and moment of inertia, thereby improving the dynamic response performance of the motor, such as acceleration and deceleration. On the other hand, the mesh structure can form a heat dissipation channel when the rotor rotates, promoting heat exchange of the cooling medium on the back of the permanent magnet, achieving efficient heat dissipation of the back area of ​​the permanent magnet, improving the passive heat dissipation mechanism of the solid rotor that relies on a single heat conduction path, and effectively ensuring the thermal stability of the permanent magnet. Furthermore, the three corners of the triangular support structure are respectively fixed to the inner wall of the polygonal mesh holes, forming internal support and reinforcement for the polygonal mesh holes, making the stress transmission path more uniform and clear, effectively suppressing the stress concentration phenomenon in the through-hole area, maintaining excellent structural stiffness and strength while maintaining a high hollow ratio, and achieving synergistic optimization of lightweight, efficient heat dissipation and mechanical performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the rotor provided by this utility model; Figure 2 for Figure 1 A partial structural diagram of the flattened rotor is provided. Figure 3 for Figure 1 A schematic diagram of the polygonal mesh structure in the provided rotor; Figure 4 A schematic diagram of the structure of an embodiment of the motor provided by this utility model; Figure 5 for Figure 4 The provided diagram shows the exploded structure of the motor.

[0018] Explanation of icon numbers: 100. Rotor; 1. Annular body; 11. Hollowed-out area; 12. Solid area; 2. Permanent magnet; 31. Polygonal mesh; 32. Triangular support structure; 321. First support beam; 322. Second support beam; 323. Third support beam; 33. Triangular mesh; 200. Motor; 4. Stator; 5. Support shaft; 6. Bearing; 7. Base; 8. Top cover.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] Permanent magnet brushless motors, with their significant advantages such as high power density, high operating efficiency, and compact structure, have become core power components in cutting-edge fields such as drones, robots, new energy vehicles, and aerospace. However, as the demands for comprehensive motor performance continue to rise in application scenarios, traditional motor rotor design faces a fundamental technical contradiction between the need for lightweighting and the bottleneck of thermal management capabilities. On the one hand, the concentrated mass distribution and high moment of inertia of traditional solid rotors limit the dynamic response performance of the motor; on the other hand, the heat dissipation path of traditional solid rotors is singular and has high thermal resistance, which easily leads to the formation of local high-temperature areas on the back of the permanent magnet, causing irreversible demagnetization of the permanent magnet.

[0024] To address the aforementioned technical problems, this utility model provides a rotor that achieves synergistic optimization of lightweighting, efficient heat dissipation, and mechanical performance from a structural design perspective by setting a composite mesh structure combining polygonal mesh holes and triangular support structures on the rotor's annular body.

[0025] It should be noted that, Figure 2 The dashed line represents the outer contour of a single polygonal mesh 31, and the dashed line schematically illustrates the spatial relationship between multiple polygonal meshes 31 that are connected to each other.

[0026] Please see Figures 1 to 3 The rotor 100 includes an annular body 1 and a plurality of permanent magnets 2. The annular body 1 is provided with at least one hollow area 11. The hollow area 11 is provided with a mesh structure. The mesh structure includes a plurality of polygonal meshes 31 arranged in an array and a triangular support structure 32 disposed within the polygonal meshes 31. The three corners of the triangular support structure 32 are respectively fixed to the inner wall of the polygonal meshes 31. The plurality of permanent magnets 2 are disposed on the inner side of the annular body 1.

[0027] By setting at least one hollow area 11 on the annular body 1, and setting a mesh structure within the hollow area 11 consisting of multiple polygonal mesh holes 31 arranged in an array and triangular support structures 32 embedded in the polygonal mesh holes 31, on the one hand, the hollow area 11 forms a mesh structure on the annular body 1, which effectively reduces the material usage of the rotor 100, significantly reduces the mass and moment of inertia of the rotor 100, thereby improving the dynamic response performance of the motor in acceleration, deceleration, and reversal; on the other hand, the mesh structure can form a heat dissipation channel when the rotor 100 rotates, promoting the flow of cooling medium on the back of the permanent magnet 2, and realizing the cooling of the permanent magnet 2. The efficient heat dissipation in the back area improves the passive heat dissipation mechanism of the solid rotor, which relies on only a single heat conduction path. This effectively reduces the operating temperature of the permanent magnet 2, ensures the thermal stability of the permanent magnet 2, and avoids irreversible demagnetization. Furthermore, the three corners of the triangular support structure 32 are fixed to the inner wall of the polygonal mesh 31, providing internal support and reinforcement to the polygonal mesh 31. This makes the stress transmission path more uniform and clear, allowing the mesh structure to maintain excellent structural rigidity and strength while achieving a high perforation rate for lightweighting and efficient heat dissipation. This achieves synergistic optimization of lightweighting, efficient heat dissipation, and mechanical performance.

[0028] Among them, the annular body 1 is the main structural component of the rotor 100. It is arranged in an annular shape and is used to rotate around its axis when the motor is working.

[0029] A hollow area 11 is provided on the annular body 1, which is a through-hole area formed on the annular body 1. The hollow area 11 removes material from the annular body 1 in this area, forming a porous network structure, thereby effectively reducing the overall mass of the rotor 100, reducing the moment of inertia, and improving the dynamic response performance of the motor. At the same time, the hollow area 11 can form a heat dissipation channel when the rotor 100 rotates, promoting the flow of cooling medium (such as air) inside the porous network, and achieving efficient heat dissipation from the back area of ​​the permanent magnet 2.

[0030] The mesh structure is located within the open area 11 and consists of multiple polygonal mesh openings 31 arranged in an array, along with triangular support structures 32 embedded within the polygonal mesh openings 31. The polygonal mesh openings 31 serve as the basic skeletal units of the mesh structure. Multiple polygonal mesh openings 31 are arranged in a periodic array, and adjacent polygonal mesh openings 31 are topologically connected through shared walls, forming a spatially continuous and mechanically coordinated overall porous network. The polygonal mesh openings 31, as the main load-bearing skeleton of the structure, provide the primary stiffness and strength support.

[0031] A triangular support structure 32 is disposed within the polygonal mesh 31, with its three corners fixed to the inner wall of the polygonal mesh 31, thereby providing internal support and reinforcement for the polygonal mesh 31. The arrangement of the triangular support structure 32 makes the stress transmission path inside the polygonal mesh 31 more uniform and clear, effectively suppressing the local stress concentration phenomenon caused by the openings. This allows the mesh structure to maintain excellent structural rigidity and strength while achieving lightweight and efficient heat dissipation through a high perforation ratio.

[0032] Multiple permanent magnets 2 are disposed on the inner side of the annular body 1 to provide a constant magnetic field, which interacts with the rotating magnetic field generated by the stator of the motor to drive the rotor 100 to rotate and output torque. Exemplarily, the permanent magnets 2 can be neodymium iron boron permanent magnets. Exemplarily, the permanent magnets 2 can also be ferrite permanent magnets. Exemplarily, the permanent magnets 2 can also be samarium cobalt permanent magnets. The permanent magnets 2 can be fixed to the inner surface of the annular body 1 by means of bonding, embedding, or snap-fitting.

[0033] Furthermore, in one embodiment of this utility model, one corner of the triangular support structure 32 is oriented towards the circumferential direction of the annular body 1. That is, the triangular support structure 32 is arranged within the polygonal mesh 31 with one apex pointing towards the circumferential direction of the annular body 1 (i.e., along the circumference of the annular body 1), while the side opposite to the apex extends approximately along the axial direction of the annular body 1. This arrangement allows the triangular support structure 32 to better adapt to the direction of the centrifugal load experienced by the rotor 100 during rotation. The apex of the triangular support structure 32 facing the circumferential direction forms a mechanical transmission node along the circumferential direction, while the side opposite to the apex extending along the axial direction provides span support for the polygonal mesh 31 along the axial direction. This facilitates the effective distribution and transmission of centrifugal force in the radial and circumferential directions, resulting in a more uniform overall stress distribution and further enhancing the mechanical load-bearing capacity of the mesh structure under high-speed rotation conditions.

[0034] Furthermore, in one embodiment of this utility model, the triangular support structure 32 includes three support beams connected end to end in sequence. One support beam is arranged along the axial direction of the annular body 1, and the other two support beams extend along the circumferential direction of the annular body 1, forming an angle with the circumferential direction of the annular body 1. Specifically, the support beam arranged along the axial direction of the annular body 1 is designated as the first support beam 321, and the two support beams extending along the circumferential direction of the annular body 1 are designated as the second support beam 322 and the third support beam 323, respectively. The first support beam 321, the second support beam 322, and the third support beam 323 are connected end to end in sequence to form a triangular configuration.

[0035] The first support beam 321 is arranged along the axial direction of the annular body 1, providing effective support span for the polygonal mesh 31 in this direction and enhancing the bending and compressive strength of the mesh structure in the axial direction. The second support beam 322 and the third support beam 323 extend along the circumferential direction of the annular body 1. They extend from both ends of the first support beam 321 in the circumferential direction and converge at a point to form a apex angle facing the circumferential direction, thereby forming an effective mechanical transmission path in the circumferential direction. This allows the centrifugal force generated when the rotor 100 rotates to be efficiently transmitted and dispersed along the second support beam 322 and the third support beam 323.

[0036] By using the above-mentioned arrangement of three support beams, the triangular support structure 32 forms a mechanical support system that takes into account both the axial and circumferential directions within the polygonal mesh 31. This makes the force transmission path clear and the stress distribution uniform, effectively avoiding stress concentration in local areas of the polygonal mesh 31. Thus, while maintaining a high perforation rate to achieve lightweighting, it ensures the mechanical reliability of the mesh structure under complex working conditions such as high-speed rotational centrifugal force, multi-axis vibration, and impact loads.

[0037] Furthermore, in one embodiment of this utility model, the polygonal mesh 31 is arranged in multiple rows, and the polygonal mesh 31 in adjacent rows are staggered along the axial direction of the annular body 1. The support beams arranged along the axial direction of the annular body 1 in each row of polygonal mesh 31 are collinear in this direction.

[0038] By setting the polygonal mesh 31 to multiple rows and arranging them along the surface of the annular body 1, a larger porous network can be formed in the hollow area 11, further increasing the hollowing rate to achieve greater weight reduction and more efficient heat dissipation performance.

[0039] The polygonal mesh 31 in adjacent rows are staggered along the axial direction of the annular main body 1, meaning that the polygonal mesh 31 in adjacent rows intersect each other in the axial direction, thus forming an interlocking topological connection between the polygonal mesh 31 in adjacent rows. This arrangement allows forces to be transmitted crosswise between the polygonal mesh 31 in adjacent rows under load, avoiding the problem of localized weakness caused by concentrated force transmission along a single path, and significantly improving the overall mechanical properties and fatigue resistance of the mesh structure.

[0040] In each row of polygonal mesh 31, the supporting beams (i.e., the first supporting beams 321) arranged along the axis of the annular main body 1 are collinear in this direction. That is, in the same row, the first supporting beams 321 in each polygonal mesh 31 are arranged on the same straight line along the axial direction. This arrangement ensures that the first supporting beams 321 form a continuous alignment relationship in the axial direction, which is beneficial for the relay transmission of forces in the axial direction through each first supporting beam 321, forming an efficient mechanical transmission chain, and further improving the stiffness and load-bearing capacity of the mesh structure along the axial direction.

[0041] Furthermore, in one embodiment of this utility model, the two support beams extending along the circumferential direction of the annular main body 1 are of equal length, that is, the second support beam 322 and the third support beam 323 are of equal length. This arrangement ensures that the triangular support structure 32 is symmetrically distributed about the perpendicular bisector of the first support beam 321, guaranteeing the consistency of the mechanical properties of the triangular support structure 32 in the circumferential direction, avoiding asymmetrical stress distribution caused by the different lengths of the two support beams, and further improving the mechanical uniformity and dynamic balance accuracy of the overall structure.

[0042] In other embodiments, the three support beams are all of equal length, that is, the first support beam 321, the second support beam 322, and the third support beam 323 are all of equal length. In this case, the triangular support structure 32 forms an equilateral triangle configuration. The equilateral triangle support structure has the best isotropic mechanical properties, the most uniform load-bearing capacity in any direction, and can better cope with multiaxial load conditions. At the same time, the equilateral triangle also exhibits the best structural stability, providing the most stable internal support for the polygonal mesh 31.

[0043] In one embodiment of this utility model, the polygonal mesh 31 is a hexagonal mesh, and the three corners of the triangular support structure 32 are respectively connected to the three corners of the hexagonal mesh distributed at intervals, so as to divide the hexagonal mesh into multiple triangular meshes 33.

[0044] The polygonal mesh 31 is set as a hexagonal mesh. The close arrangement of the hexagonal mesh can form a high-density porous network, which maintains the continuity and integrity of the structure while achieving a high permeability.

[0045] The three corners of the triangular support structure 32 are respectively connected to the three corners of the hexagonal mesh, which are spaced apart. That is, the hexagonal mesh has six corners, and the three corners of the triangular support structure 32 are respectively connected to three alternate corners. Specifically, the six corners of the hexagonal mesh can be numbered sequentially from corner one to corner six. The three corners of the triangular support structure 32 can then be connected to corner one, corner three, and corner five, or to corner two, corner four, and corner six, respectively. This arrangement maximizes the spacing between the three corners of the triangular support structure 32 on the inner wall of the hexagonal mesh, thus providing the most uniform and efficient internal support for the hexagonal mesh.

[0046] Through the aforementioned arrangement of the triangular support structure 32, the hexagonal mesh is divided into multiple triangular meshes 33. This arrangement subdivides the originally large-area hexagonal mesh into multiple smaller-area triangular meshes 33. While maintaining a relatively constant overall permeability, the span of each individual mesh is significantly reduced, effectively lowering the stress level at the edges of each mesh and resulting in a more uniform stress distribution across the overall structure.

[0047] The composite configuration of hexagonal mesh and triangular support structure 32 combines the high specific stiffness advantage of hexagonal honeycomb structure with the high stability advantage of triangular support structure, forming a composite structure of "honeycomb skeleton + triangular reinforcement". This composite structure makes the mechanical properties of the mesh structure more uniform in all directions, and can better adapt to multi-directional centrifugal loads during high-speed rotation.

[0048] In one embodiment of the present invention, a plurality of hollow areas 11 are provided, and the plurality of hollow areas 11 are distributed along the circumferential direction of the annular body 1. There is a gap between adjacent hollow areas 11 to form a solid area 12 on the annular body 1.

[0049] Multiple hollow areas 11 are distributed along the circumferential direction of the annular body 1, so that the annular body 1 forms a structural layout in which hollow areas 11 and solid areas 12 are arranged alternately in the circumferential direction. The solid areas 12 are areas with high material density distribution, that is, the solid parts that are not hollowed out between adjacent hollow areas 11.

[0050] The solid region 12 is connected to the adjacent hollow region 11 in the circumferential direction, providing structural continuity and overall rigidity in the circumferential direction for the annular body 1, and ensuring the structural integrity of the rotor 100 under high-speed rotation conditions.

[0051] For example, multiple hollow areas 11 can be distributed at equal intervals along the circumferential direction of the annular body 1, so that the mass of the annular body 1 is evenly distributed along the circumferential direction, ensuring the dynamic balance accuracy of the rotor 100 and avoiding vibration and noise problems caused by uneven mass distribution.

[0052] Furthermore, in one embodiment of this utility model, the permanent magnet 2 and the hollow area 11 are positioned correspondingly, that is, the installation position of the permanent magnet 2 on the inner side of the annular body 1 and the setting position of the hollow area 11 on the annular body 1 correspond in the circumferential direction.

[0053] In terms of heat dissipation performance, the heat generated by eddy current losses during the operation of the permanent magnet 2 can be efficiently dissipated directly through the porous network in the corresponding hollow area 11. Since the hollow area 11 is located on the back of the permanent magnet 2 (i.e., radially outward), the heat conduction path is the shortest and the thermal resistance is the lowest, resulting in the highest heat dissipation efficiency. When the rotor 100 rotates, the porous network in the hollow area 11 acts as a built-in centrifugal impeller, actively driving the cooling medium to flow in a forced manner within the porous network, achieving direct convective cooling of the back area of ​​the permanent magnet 2. This fundamentally changes the passive heat dissipation mechanism of traditional solid rotors that relies on heat conduction, effectively ensuring the thermal stability of the permanent magnet 2 and preventing irreversible demagnetization.

[0054] Please see Figure 4 and Figure 5 This utility model also provides a motor 200, which includes the rotor 100 of the above embodiments. The motor 200 also includes a stator 4, a support shaft 5, a bearing 6, a base 7, and a top cover 8.

[0055] The stator 4 is located inside the rotor 100, and there is an air gap between the stator 4 and the rotor 100. The rotating magnetic field generated by the stator 4 interacts with the excitation magnetic field provided by the permanent magnet 2 on the rotor 100, driving the rotor 100 to rotate and output torque.

[0056] The support shaft 5 is fixed on the base 7 and is used to install the stator 4 and serve as the inner ring support of the bearing 6, ensuring the coaxiality and air gap uniformity between the stator 4 and the rotor 100.

[0057] The bearing 6 is used to support the rotor 100 and the permanent magnet 2 set on the rotor 100, ensuring that it rotates smoothly around the support shaft 5, while reducing friction loss and bearing radial and axial loads.

[0058] The base 7 is the fixed base of the motor 200, used to install the motor 200 on external equipment, and at the same time supports the shaft 5 and the stator 4 to ensure structural stability.

[0059] The top cover 8 is located on the top of the motor 200, which closes the top of the motor 200, protects the internal components from external contamination, and together with the base 7 supports the bearing 6 to ensure the axial positioning of the rotor 100.

[0060] Motor 200 is an external rotor permanent magnet brushless motor. Rotor 100 is located outside stator 4 and rotates around support shaft 5 in the form of an external rotor. Rotor 100 adopts the aforementioned composite mesh structure design. During rotation, the porous network formed by the mesh structure in the hollow area 11 acts similarly to a built-in centrifugal fan. The centrifugal force generated by rotation drives the surrounding cooling medium (such as air) into the porous network and forces it to flow along the heat dissipation channels formed by the porous network. This achieves direct convection cooling of the rotor 100 interior, especially the back area of ​​permanent magnet 2, effectively reducing the operating temperature of permanent magnet 2 and ensuring the thermal stability of permanent magnet 2 and the long-term operational reliability of motor 200.

[0061] Meanwhile, since the annular body 1 of the rotor 100 is alternately distributed with hollow areas 11 and solid areas 12, the solid areas 12 ensure the magnetic circuit integrity and overall structural rigidity of the rotor 100. The mesh structure in the hollow areas 11, which is composed of polygonal mesh 31 and triangular support structure 32, enables the rotor 100 to achieve efficient force transmission and uniform distribution when subjected to high-speed rotational centrifugal force, multi-axis vibration and impact load through the synergistic effect of the skeleton support of polygonal mesh 31 and the internal reinforcement of triangular support structure 32. Thus, it has excellent structural rigidity, strength and impact toughness.

[0062] For example, the motor 200 can be applied to a drone propulsion system, or to an articulated robot drive system. For example, the motor 200 can also be applied to a new energy vehicle drive system or an electric aircraft propulsion system.

[0063] This utility model also provides a drive system, which includes the motor 200 described above. The specific structure of the motor 200 is as described in the above embodiments. Since this drive system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0064] The drive system can be a drone propulsion system, a robot joint drive system, a new energy vehicle power drive system, or an electric aircraft propulsion system, etc. By using a motor 200 containing the aforementioned rotor 100 as the power output element, the drive system can fully utilize the combined advantages of the rotor 100's lightweight, efficient heat dissipation, and excellent mechanical properties to improve the overall performance of the drive system.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rotor, characterized in that, include: A ring-shaped body, wherein the ring-shaped body is provided with at least one hollow area, the hollow area is provided with a mesh structure, the mesh structure includes a plurality of polygonal meshes arranged in an array, and a triangular support structure provided within the polygonal meshes, wherein the three corners of the triangular support structure are respectively fixed to the inner wall of the polygonal meshes; Multiple permanent magnets are disposed on the inner side of the annular body.

2. The rotor as claimed in claim 1, characterized in that, One corner of the triangular support structure is oriented towards the circumferential direction of the annular main body.

3. The rotor as described in claim 2, characterized in that, The triangular support structure includes three support beams connected end to end in sequence. One of the support beams is arranged along the axis of the annular main body, and the other two support beams extend along the circumferential direction of the annular main body and are arranged at an angle to the circumferential direction of the annular main body.

4. The rotor as described in claim 3, characterized in that, The polygonal mesh is arranged in multiple rows, with adjacent rows of polygonal mesh staggered along the axial direction of the annular body. Each support beam in each row of polygonal mesh is collinear along the axial direction of the annular body.

5. The rotor as described in claim 3, characterized in that, The two support beams extending along the circumferential direction of the annular body are of equal length; and / or, All three support beams are of equal length.

6. The rotor as claimed in claim 1, characterized in that, The polygonal mesh is a hexagonal mesh, and the three corners of the triangular support structure are respectively connected to the three corners of the hexagonal mesh, which are spaced apart, so as to divide the hexagonal mesh into multiple triangular meshes.

7. The rotor as claimed in any one of claims 1 to 6, characterized in that, The hollowed-out areas are provided in multiple ways, and the multiple hollowed-out areas are distributed along the circumferential direction of the annular body. There are gaps between adjacent hollowed-out areas to form solid areas on the annular body.

8. The rotor as claimed in claim 7, characterized in that, The permanent magnet is positioned corresponding to the hollowed-out area.

9. An electric motor, characterized in that, Includes a rotor as described in any one of claims 1 to 8.

10. A drive system, characterized in that: Includes the motor as described in claim 9.

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