Rotor, electric machine and transport vehicle

Abstract

The application relates to a rotor, a motor and a transport carrier. The rotor comprises a rotor core and a permanent magnet, the rotor core is provided with a shaft mounting hole in the axial direction, the rotor core is further provided with a wind guide groove, the wind guide groove is communicated with the shaft mounting hole and the outside, and the two ends of the wind guide groove respectively penetrate through the opposite ends of the rotor; the permanent magnet is connected to the rotor core. The rotor core of the rotor is provided with the penetrating wind guide groove, the wind guide groove effectively improves the convection heat exchange coefficient of the rotor, reduces the working temperature of the rotor, and thus reduces the risk of high-temperature demagnetization of the permanent magnet.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a rotor, a motor, and a transport vehicle. Background Technology

[0002] Ride comfort and handling stability are two core performance indicators in automotive chassis design, and their balance and optimization permeate every technical aspect of chassis development. From the dynamic response of the suspension system to the precise tuning of the stiffness and damping of elastic components, designers need to achieve synergistic improvement of both through multi-dimensional engineering innovation. To achieve precise control, electromagnetic active suspension is increasingly being adopted in high-performance vehicles.

[0003] Because electromagnetic active suspension operates under complex and harsh conditions, the active suspension motor operates for a long time, which leads to excessively high temperatures in the internal windings of the motor, and there is also a risk of localized demagnetization of the permanent magnets due to high temperatures. Utility Model Content

[0004] This application provides a rotor, an electric motor, and a transport vehicle, aimed at improving the heat dissipation problem of existing electric motors.

[0005] In a first aspect, this application provides a rotor. The rotor includes a rotor core and a permanent magnet. The rotor core has a shaft mounting hole along the axial direction and an air guide groove that connects the shaft mounting hole to the outside. The two ends of the air guide groove pass through opposite ends of the rotor. The permanent magnet is connected to the rotor core.

[0006] In some alternative examples, the rotor core includes multiple permanent magnet mounts arranged in an axial array around the rotor, commonly defining a shaft mounting hole, with adjacent permanent magnet mounts spaced apart to form air guide slots.

[0007] In some optional examples, the number of permanent magnets is set to multiple, and the multiple permanent magnets are arranged at intervals along the circumference of the rotor core outside the rotor core. The permanent magnets protrude relative to the outer peripheral wall of the rotor core. The permanent magnets have a first surface and a second surface facing away from each other. The first surface is a concave curved surface and the second surface is a convex curved surface. The first surface of each permanent magnet faces the second surface of the adjacent permanent magnet.

[0008] In some optional examples, the outer wall of the rotor core is provided with multiple mounting slots, which are arranged at intervals along the circumference of the rotor. Multiple permanent magnets are set one-to-one with the multiple mounting slots, and the permanent magnets are embedded in the corresponding mounting slots.

[0009] Secondly, this application also provides an electric motor, including a stator and the aforementioned rotor, wherein the rotor is rotatably disposed within the stator.

[0010] In some alternative examples, the stator includes a stator core having a rotor mounting hole in which the rotor is disposed; the stator core also has ventilation holes that penetrate the stator core to connect the rotor mounting hole to the outside.

[0011] In some optional examples, the stator core includes a body and multiple mounting teeth. The multiple mounting teeth are arranged around the inner peripheral wall of the body around the stator axis to jointly define the rotor mounting hole. Adjacent mounting teeth are spaced apart. Multiple sets of ventilation holes are provided, and the multiple sets of ventilation holes are arranged one-to-one with the multiple mounting teeth. Each set of ventilation holes passes through the body and the mounting teeth in sequence.

[0012] In some optional examples, the stator also includes a heat-conducting component connected to the mounting teeth and extending out of the body. The heat-conducting component includes two sets of heat-conducting elements, which are respectively disposed at both ends of the stator core. Each set of heat-conducting elements includes multiple heat-conducting elements, and the multiple heat-conducting elements in each set are disposed in correspondence with multiple mounting teeth. One end of the heat-conducting element is connected to the corresponding mounting tooth, and the other end extends out of the body.

[0013] In some alternative examples, the heat-conducting element includes a connector and an extension, the connector having a connection slot in which mounting teeth are embedded, and the extension being connected to the connector and extending radially along the stator.

[0014] Thirdly, this application also provides a transport vehicle, including a vehicle body and an electric suspension, the electric suspension being mounted on the vehicle body, the electric suspension including the suspension body and the aforementioned motor, the motor being mounted on the suspension body.

[0015] The rotor provided in this application has a through-hole air guide groove on its core. When the motor is in use, the air guide groove on the rotor core accelerates the convection between the rotor shaft mounting hole and the outside air, enhancing heat dissipation and acting as a pump. The air guide groove effectively improves the rotor's convective heat transfer coefficient, reduces the rotor's operating temperature, and thus reduces the risk of high-temperature demagnetization of the permanent magnet. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments 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 from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a transport vehicle provided in one embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the structure of an electric suspension provided in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the structure of a motor provided in one embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the rotor provided in one embodiment of this application.

[0021] Figure 5 yes Figure 4 The diagram shows a cross-sectional view of the rotor.

[0022] Figure 6 yes Figure 3 The diagram shows the structure of the stator of the motor.

[0023] Figure 7 yes Figure 3 The diagram shows the structure of the heat-conducting component of the stator.

[0024] Labeling Explanation: 100, Rotor; 10, Rotor Core; 12, Permanent Magnet Mounting Base; 121, Mounting Slot; 101, Shaft Mounting Hole; 103, Air Guide Slot; 30, Permanent Magnet; 32, First Surface; 34, Second Surface; 200, Motor; 20, Stator; 21, Stator Core; 211, Rotor Mounting Hole; 212, Body; 213, Ventilation Hole; 214, Mounting Gear; 23, Heat Conducting Component; 232, Heat Conducting Component; 2321, Connecting Part; 2322, Connecting Slot; 2323, Extension Part; 40, End Cap; 300, Electric Suspension; 301, Suspension Body; 400, Transport Vehicle; 401, Vehicle Body. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0026] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. For example, the term "comprising" used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem and basically achieve the technical effect within a certain margin of error.

[0027] Please also refer to Figure 1 and Figure 2 This application provides an electric suspension 300, which can be applied to a transport vehicle 400. The electric suspension 300 is installed on the vehicle body 401 of the transport vehicle 400 to actively apply force to counteract the vibration of the transport vehicle 400, dynamically maintain the stability of the transport vehicle 400, and improve the comfort of the transport vehicle 400.

[0028] This specification does not limit the specific type of the transport vehicle 400. For example, the transport vehicle 400 can be a vehicle, a high-speed train, an airplane, or other such vehicles. In this embodiment, the transport vehicle 400 is a vehicle. The transport vehicle 400 may include a vehicle body 401 and the aforementioned electric suspension 300, with the electric suspension 300 mounted on the vehicle body 401. The vehicle body 401 may include conventional components such as a vehicle body and wheels, and the electric suspension 300 may function as a shock absorber, located at each wheel suspension or integrated into the shock absorber strut assembly.

[0029] Please also refer to Figure 2 and Figure 3 The electric suspension 300 may include a suspension body 301 and a motor 200. The motor 200 is mounted on the suspension body 301 and serves as the main power source for the electric suspension 300. This specification does not limit the specific structure of the electric suspension 300. For example, the electric suspension 300 may also include actuators, an air spring system, a sensing system, a control system, etc. The electric suspension 300 converts rotational motion into linear motion through the combination of the motor 200 and a mechanical transmission device (such as a ball screw, rack and pinion, or rocker arm push rod), thereby achieving active control.

[0030] Please also refer to Figure 3 , Figure 4 and Figure 5 In this embodiment, the motor 200 may include a rotor 100 and a stator 20, wherein the rotor 100 is rotatably disposed within the stator 20. The rotor 100 may include a rotor core 10 and a permanent magnet 30. The rotor core 10 is provided with a shaft mounting hole 101 along the axial direction, and the rotor core 10 is also provided with an air guide groove 103, which connects the shaft mounting hole 101 and the outside. The two ends of the air guide groove 103 respectively penetrate through opposite ends of the rotor core 10. The permanent magnet 30 is connected to the rotor core 10.

[0031] In the rotor 100, a through-hole air guide groove 103 is formed on the rotor core 10. When the motor 200 is in use, the air guide groove 103 on the rotor core 10 accelerates the convection between the air inside the shaft mounting hole 101 of the rotor 100 and the outside air, enhancing heat dissipation and acting as a pump. The air guide groove 103 effectively improves the convective heat transfer coefficient of the rotor 100, reduces the operating temperature of the rotor 100 and the stator 20, thereby reducing the risk of high-temperature demagnetization of the permanent magnet 30.

[0032] The rotor core 10 may include multiple permanent magnet mounting seats 12, which are arranged in an axial array around the rotor 100 and collectively define a shaft mounting hole 101. Adjacent permanent magnet mounting seats 12 are spaced apart to form air guide slots 103. The rotor core 10 is divided into multiple permanent magnet mounting seats 12 by the air guide slots 103. Each air guide slot 103 connects the shaft mounting hole 101 between the multiple permanent magnet mounting seats 12 to the outside. When the motor 200 is operating, the air guide slots 103 between adjacent permanent magnet mounting seats 12 greatly accelerate the air convection and heat dissipation efficiency between the shaft mounting hole 101 and the outside.

[0033] In this embodiment, the air guide slot 103 extends along the axial direction of the rotor 100 and penetrates approximately radially through the shaft mounting hole 101. The shaft mounting hole 101 is a circular hole opened along the axial direction of the rotor 100. Due to the arrangement of the shaft mounting hole 101 and the air guide slot 103, the cross-section of the permanent magnet mounting base 12 (the cross-section along the direction perpendicular to the axial direction of the rotor 100) is approximately C-shaped. This specification does not limit the specific number of permanent magnet mounting bases 12. In some optional examples, the number of permanent magnet mounting bases 12 can be four, and the four permanent magnet mounting bases 12 are arranged in an array around the axial direction of the rotor 100. Correspondingly, the number of air guide slots 103 is also provided. The four air guide slots 103 are arranged approximately equidistantly along the circumference of the rotor 100 to improve the uniformity of convective heat dissipation of the motor 200.

[0034] This specification does not limit the specific material of the rotor core 10. The rotor core 10 can be made of a high-strength material with good thermal conductivity, such as silicon steel sheets, to improve the mechanical strength and heat dissipation performance of the rotor 100. In other embodiments, the rotor core 10 can also be made of amorphous alloys, ferrites, or other materials.

[0035] In some embodiments, the rotor 100 may further include an output shaft, which passes through a shaft mounting hole 101 for connecting the rotor 100 to an external drive device of the motor 200. One end of the output shaft extends out of the rotor core 10 and is connected to the external drive device, while the other end is fixedly connected to the inner wall of the rotor core 10 to transmit torque.

[0036] The permanent magnet 30 is fixedly connected to the permanent magnet mounting base 12. It is used to form a strong magnetic field with a fixed direction on the surface or inside the rotor core 10. This magnetic field interacts with the rotating magnetic field generated when the windings of the stator 20 are energized, generating electromagnetic torque and driving the rotor 100 to rotate. The permanent magnet 30 can be made of rare-earth permanent magnet materials, such as neodymium iron boron, which has high magnetic energy product and coercivity, and can provide a stable magnetic field, enhancing the output torque and efficiency of the motor 200.

[0037] In this embodiment, multiple permanent magnets 30 are arranged at intervals along the circumference of the rotor core 10 outside the rotor core 10, with each permanent magnet 30 protruding relative to the outer peripheral wall of the rotor core 10. When the rotor core 10 rotates, the multiple protruding permanent magnets 30 act as a blower, accelerating the flow of surrounding air, effectively increasing the convective heat transfer coefficient of the rotor 100 surface, and further improving the heat dissipation effect.

[0038] The permanent magnet 30 extends axially along the rotor 100. The permanent magnet 30 can be bent radially along the rotor 100, generally forming an arc-shaped plate to create a fan-like structure and further improve the airflow effect. In this embodiment, the permanent magnet 30 may have a first surface 32 and a second surface 34 facing away from each other. The first surface 32 is a concave curved surface, and the second surface 34 is a convex curved surface. The first surface 32 of each permanent magnet 30 faces the second surface 34 of the adjacent permanent magnet 30. The cross-section of the permanent magnet 30 is approximately curved and crescent-shaped. This design not only enhances the structural strength of the permanent magnet 30 but also helps to form a more effective airflow channel through the cooperation of the concave and convex curved surfaces when the rotor 100 rotates, further enhancing the airflow effect and improving the heat dissipation performance of the motor 200.

[0039] This specification does not limit the specific number of permanent magnets 30. Multiple permanent magnets 30 can be evenly distributed on multiple permanent magnet mounting bases 12. As an example, the number of permanent magnets 30 is set to eight, with two permanent magnets 30 each on four permanent magnet mounting bases 12. In some optional examples, the permanent magnets 30 are connected to the rotor core 10 by adhesive or mechanical fixing. For example, the permanent magnets 30 and the rotor core 10 can be fixed by structures such as clips or bolts to provide additional fixing force.

[0040] In this embodiment, the outer wall of the rotor core 10 may be provided with multiple mounting slots 121. These mounting slots 121 are arranged at intervals along the circumference of the rotor 100. Multiple permanent magnets 30 are correspondingly arranged in one of the mounting slots 121, and each permanent magnet 30 is embedded within its corresponding mounting slot 121. Each mounting slot 121 extends axially along the rotor core 10, is radially recessed along the rotor core 10, and has an opening facing outwards from the rotor core 10. The permanent magnets 30 are connected to the rotor core 10 through the mounting slots 121. The special curved structure of the permanent magnets 30 allows them to be more securely mounted on the rotor core 10, while also facilitating their installation and removal.

[0041] In this embodiment, to accommodate multiple permanent magnet mounting bases 12, the motor 200 may further include two end covers 40, which are spaced apart from each other. The multiple permanent magnet mounting bases 12 are fixedly connected between the two end covers 40, for example, by bolts. Each end cover 40 also has mounting holes for the output shaft to pass through.

[0042] Please also refer to Figure 3 , Figure 4 and Figure 6 In this embodiment, the stator 20 is sleeved around and rotatably connected to the rotor 100. The stator 20 may include a stator core 21, which may have a rotor mounting hole 211. The rotor 100 is disposed within the rotor mounting hole 211. The stator core 21 has a ventilation hole 213 that penetrates the stator core 21 to connect the rotor mounting hole 211 to the outside. The ventilation hole 213 connects the rotor mounting hole 211 to the outside, allowing external airflow to directly dissipate heat from the rotor core 10 and the permanent magnet 30 within the rotor mounting hole 211, thereby reducing the operating temperature of the rotor 100 and the stator 20 and minimizing the risk of high-temperature demagnetization of the permanent magnet 30.

[0043] The stator core 21 may include a body 212 and multiple mounting teeth 214. The mounting teeth 214 are arranged around the axial direction of the stator 20 on the inner peripheral wall of the body 212 to collectively define the rotor mounting hole 211. Adjacent mounting teeth 214 are spaced apart. Multiple sets of ventilation holes 213 are provided, and each set of ventilation holes 213 corresponds one-to-one with the multiple mounting teeth 214. Each set of ventilation holes 213 passes through the body 212 and the mounting teeth 214 in sequence. The multiple sets of ventilation holes 213 enable more external airflow to directly dissipate heat from the rotor core 10 and the permanent magnet 30, further improving the heat dissipation efficiency of the rotor 100 and the stator 20.

[0044] In this embodiment, the body 212 is generally cylindrical and has a through hole along its axial direction. Mounting teeth 214 are fixedly connected to the inner peripheral wall of the body 212; for example, the mounting teeth 214 can be integrally formed with the body 212. The mounting teeth 214 are generally rectangular plates and are fixed to the inner peripheral wall of the body 212 radially. The side of the mounting teeth 214 away from the body 212 points towards the axis of the body 212, and the sides of multiple mounting teeth 214 away from the body 212 collectively define the rotor mounting hole 211. In some embodiments, the side of the mounting teeth 214 away from the body 212 is provided as an arc surface, the centers of the arc surfaces of multiple mounting teeth 214 coincide and are located on the axis of the stator 20, and the arc surfaces of multiple mounting teeth 214 define the rotor mounting hole 211.

[0045] This specification does not limit the specific material of the stator core 21. The stator core 21 can be made of a high-strength material with good thermal conductivity, such as silicon steel sheets, to improve the mechanical strength and heat dissipation performance of the stator 20. Multiple sets of ventilation holes 213 are provided one-to-one with multiple mounting teeth 214, and each mounting tooth 214 has a set of ventilation holes 213. This specification does not limit the number of ventilation holes 213 included in each set of ventilation holes 213. As an example, each set of ventilation holes 213 includes three ventilation holes 213, which are arranged at intervals along the axial direction of the stator 20. Each ventilation hole 213 sequentially penetrates the body 212 and the mounting tooth 214 to communicate with the rotor mounting hole 211 inside the stator 20.

[0046] Please also refer to Figure 3 and Figure 6 In this embodiment, the stator 20 may further include stator windings. Mounting slots are formed between adjacent mounting teeth 214, and the stator windings are disposed within the mounting slots between the mounting teeth 214. To achieve rapid heat dissipation of the stator windings, the stator 20 may further include a heat-conducting component 23, which is connected to the mounting teeth 214 and extends outside the body 212. The heat-conducting component 23 is mounted on the mounting teeth 214 and is used to dissipate heat from the stator windings between the mounting teeth 214, transferring the heat from the stator windings to the outside of the stator 20 for convective heat exchange with the air, thereby improving the heat dissipation efficiency of the stator 20.

[0047] Please also refer to Figure 3 , Figure 6 and Figure 7 The heat-conducting component 23 may include two sets of heat-conducting elements 232, which are respectively disposed at both ends of the stator core 21. Each set of heat-conducting elements 232 includes multiple heat-conducting elements 232, and the multiple heat-conducting elements 232 in each set are arranged one-to-one with multiple mounting teeth 214. One end of the heat-conducting element 232 is connected to the corresponding mounting tooth 214, and the other end extends out of the body 212. The multiple heat-conducting elements 232 in each set are arranged one-to-one with multiple mounting teeth 214. Each opposite end of each mounting tooth 214 is connected to a heat-conducting element 232. Each heat-conducting element 232 directly conducts the heat on the corresponding mounting tooth 214 (the heat conducted from the stator winding to the mounting tooth 214) to the air, and performs convective heat exchange with the air.

[0048] This specification does not limit the specific material of the heat-conducting element 232. The heat-conducting element 232 can be made of materials with good thermal conductivity, such as copper, aluminum, or alloys, to improve heat dissipation efficiency. In this embodiment, the heat-conducting element 232 uses a thermally conductive copper sheet, which better utilizes the high thermal conductivity of copper to achieve rapid heat dissipation of the stator winding. The shape and size of the heat-conducting element 232 can be designed according to actual needs. For example, the heat-conducting element 232 can be columnar, sheet-like, or finned to increase the heat dissipation area and improve the heat dissipation effect.

[0049] In this embodiment, the heat-conducting element 232 may include a connecting portion 2321 and an extension portion 2323. The connecting portion 2321 has a connecting slot 2322, and the mounting teeth 214 are embedded in the connecting slot 2322. The extension portion 2323 is connected to the connecting portion 2321 and extends radially along the stator 20. The opposite ends of the mounting teeth 214 are respectively embedded in the corresponding connecting slots 2322 of the connecting portion 2321, which greatly increases the contact area between the heat-conducting element 232 and the mounting teeth 214, increases the heat conduction and heat dissipation area, and improves the heat dissipation efficiency. The connecting portion 2321 is connected to the mounting teeth 214, and the extension portion 2323 extends to the outside of the body 212 to exchange heat with the air via convection.

[0050] To further increase the heat dissipation area and improve the heat dissipation effect, the connecting part 2321 is generally U-shaped, and the extension part 2323 is rectangular. In other embodiments, the outer surface of the heat-conducting element 232 may be provided with heat dissipation fins or heat dissipation ribs to increase the heat dissipation area and improve the heat dissipation efficiency. The number and shape of the heat dissipation fins or heat dissipation ribs can be designed according to actual needs to achieve the best heat dissipation effect.

[0051] In the rotor 100 provided in this application, a through-hole air guide groove 103 is provided on the rotor core 10. When the motor 200 is in use, the air guide groove 103 on the rotor core 10 accelerates the convection of air between the rotor 100 shaft mounting hole 101 and the outside air, enhances heat dissipation, and acts as a pump. The air guide groove 103 effectively improves the convective heat transfer coefficient of the rotor 100, reduces the operating temperature of the rotor 100 and the stator 20, thereby reducing the risk of high-temperature demagnetization of the permanent magnet 30. The stator core 21 is provided with a ventilation hole 213, which penetrates the stator core 21 to connect the rotor mounting hole 211 and the outside, so that the external airflow can directly dissipate heat from the rotor core 10 and the permanent magnet 30 in the rotor mounting hole 211, reducing the operating temperature of the rotor 100 and the stator 20. The heat-conducting component 23 is mounted on the mounting teeth 214. It is used to dissipate heat from the stator windings between the mounting teeth 214, transfer the heat of the stator windings to the outside of the stator 20, and perform convective heat exchange with the air, thereby improving the heat dissipation efficiency of the stator 20.

[0052] In summary, the motor 200 provided in this application improves heat dissipation performance and reduces the risk of high-temperature demagnetization of the permanent magnet 30 by optimizing the structural design of the rotor 100 and stator 20, thereby improving the reliability and service life of the motor. Furthermore, the motor 200 provided in this application also has advantages such as simple structure, ease of manufacture and maintenance, and is suitable for various applications requiring efficient heat dissipation.

[0053] Terminology Explanation In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] 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.

[0055] In the description of this application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "inside", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application 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. Therefore, they should not be construed as limitations on this application.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A rotor characterized by, It includes a rotor core and a permanent magnet. The rotor core has a shaft mounting hole along the axial direction and an air guide groove. The air guide groove connects the shaft mounting hole to the outside. The two ends of the air guide groove pass through opposite ends of the rotor. The permanent magnet is connected to the rotor core.

2. The rotor of claim 1, wherein The rotor core includes multiple permanent magnet mounting seats, which are arranged in an axial array around the rotor and together define the shaft mounting hole. Adjacent permanent magnet mounting seats are spaced apart to form the air guide groove.

3. The rotor of claim 1, wherein The number of permanent magnets is set to multiple, and the multiple permanent magnets are arranged at intervals along the circumference of the rotor core outside the rotor core. The permanent magnets protrude relative to the outer peripheral wall of the rotor core. The permanent magnets have a first surface and a second surface facing away from each other. The first surface is a concave curved surface and the second surface is a convex curved surface. The first surface of each permanent magnet faces the second surface of the adjacent permanent magnet.

4. The rotor of claim 3, wherein The outer wall of the rotor core is provided with multiple mounting slots, which are arranged at intervals along the circumference of the rotor. Multiple permanent magnets are set one-to-one with the multiple mounting slots, and the permanent magnets are embedded in the corresponding mounting slots.

5. An electric machine characterized by include: stator; And a rotor as described in any one of claims 1 to 4, the rotor being rotatably disposed within the stator.

6. The electric machine of claim 5, wherein, The stator includes a stator core, the stator core having a rotor mounting hole, the rotor being disposed within the rotor mounting hole; the stator core having a ventilation hole, the ventilation hole penetrating the stator core to connect the rotor mounting hole to the outside.

7. The electric machine of claim 6, wherein, The stator core includes a body and multiple mounting teeth. The multiple mounting teeth are arranged around the inner peripheral wall of the body around the axial direction of the stator to jointly define the rotor mounting hole. Adjacent mounting teeth are spaced apart. Multiple sets of ventilation holes are provided, and the multiple sets of ventilation holes are arranged one-to-one with the multiple mounting teeth. Each set of ventilation holes passes through the body and the mounting teeth in sequence.

8. The electric machine of claim 7, wherein, The stator also includes a heat-conducting component, which includes two sets of heat-conducting elements. The two sets of heat-conducting elements are respectively disposed at both ends of the stator core. Each set of heat-conducting elements includes multiple heat-conducting elements. The multiple heat-conducting elements in each set are disposed in one-to-one correspondence with the multiple mounting teeth. One end of the heat-conducting element is connected to the corresponding mounting tooth, and the other end extends out of the body.

9. The electric machine of claim 8, wherein, The heat-conducting component includes a connecting portion and an extension portion. The connecting portion has a connecting slot, and the mounting teeth are embedded in the connecting slot. The extension portion is connected to the connecting portion and extends radially along the stator.

10. A transport vehicle, characterized in that include: Vehicle body; And an electric suspension, the electric suspension being mounted on the vehicle body, the electric suspension comprising a suspension body and a motor as described in any one of claims 5 to 9, the motor being mounted on the suspension body.

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