Motor Rotor, Motor, Power Train, and Electric Equipment

Abstract

This application can be applied to the technical field of motors (100), and provides a motor rotor (10), a motor (100), a power train (1000), and an electric device. The electric device includes the power train (1000), the power train (1000) includes the motor (100), and the motor (100) includes a motor rotor (10), a stator (20), and a rotating shaft (30). The motor rotor (10) includes a mounting frame (11) and magnetic steel (12), and the magnetic steel (12) is mounted on the mounting frame (11). A stopper wall (101) is provided on the mounting frame (11), and the stopper wall (101) is used to resist the radial centrifugal movement of the magnetic steel (12). By installing the stopper wall (101) on the mounting frame (11), the stopper wall (101) can share the stress caused by the radial centrifugal movement of the magnetic steel (12) of the mounting frame (11), so that the mounting frame (11) can withstand relatively large stress, and the problem that the magnetic steel (12) pops out externally when the motor rotor (10) rotates can be improved, and the motor rotor (10) can meet the high rotational speed requirement.

Description

Technical Field

[0001] [Cross - reference to Related Applications] This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on April 17, 2023, with the application number 202310410773.6 and the application title "Motor Rotor, Motor, Power Train and Electric Equipment", and all of its content is incorporated into this application by reference.

[0002] This application relates to the field of motor technology, specifically to motor rotors, motors, power trains and electric equipment.

Background Art

[0003] In related technologies, a motor rotor includes a mounting frame and magnetic steel installed on the mounting frame.

[0004] In some cases, the mounting frame has relatively low stress resistance to the magnetic steel, making it difficult to meet the high - rotation - speed requirements of the motor rotor.

Summary of the Invention

[0005] In view of the above problems, the purpose of the embodiments of this application is to provide a motor rotor, a motor, a power train and an electric equipment that can solve the technical problem of the low stress resistance of the mounting frame.

[0006] The technical solutions adopted by the embodiments of this application are as follows.

[0007] According to a first aspect, the embodiments of this application provide a motor rotor, which includes a mounting frame and magnetic steel attached to the mounting frame, wherein a stopper wall is provided on the mounting frame, and the stopper wall is used to resist the radial centrifugal movement of the magnetic steel.

[0008] According to an embodiment of the present application, for the motor rotor, by installing a stopper wall on the mounting frame to resist the radial centrifugal movement of the magnetic steel, after the magnetic steel is mounted on the mounting frame, the mounting frame can further resist the radial centrifugal movement of the magnetic steel by the stopper wall. That is, the stopper wall can share the stress caused by the radial centrifugal movement of the magnetic steel on the mounting frame, whereby the mounting frame can withstand relatively large stress, and thereby the mounting frame and the magnetic steel have relatively high bonding reliability, and the problem that the magnetic steel pops out externally when the motor rotor rotates can be improved, and the motor rotor can meet the use requirements of high rotational speed.

[0009] In some embodiments, a plurality of mounting regions distributed along the radial direction are provided on the mounting frame, the magnetic steel is mounted on the plurality of mounting regions, and a stopper wall is provided on at least one mounting region.

[0010] By dividing the mounting frame into a plurality of mounting regions, the magnetic steel can be mounted separately by dividing regions in the radial direction, which is advantageous for improving the mounting reliability with the mounting frame, and thereby advantageous for improving the stress that the mounting frame can withstand against the magnetic steel. On the other hand, the radial centrifugal movement of the magnetic steel can be further resisted by the stopper wall, and by improving the mounting reliability between the mounting frame and the magnetic steel, the stress that the mounting frame can withstand against the magnetic steel can be improved. Installed in this way, the mounting frame has relatively large stress that can be withstood and can meet the high rotational speed requirements of the motor rotor.

[0011] In some embodiments, a partition member is provided between two adjacent mounting regions along the radial direction, and the wall surface of the partition member facing the central axis of the mounting frame is a stopper wall.

[0012] By installing a partition member between two adjacent mounting regions in the radial direction, the partition member can separate the magnetic steel. On the one hand, the magnetic steel is installed separately in regions. On the other hand, it facilitates the mounting operation in the mounting frame of the magnetic steel. On the other hand, it makes the mounting flexibility in the mounting frame of the magnetic steel relatively high. Note that the partition member can divide the magnetic steel into a plurality of parts distributed in sequence along the radial direction, so that the plurality of parts of the magnetic steel can form vortices in cooperation with the stator respectively, that is, form a plurality of small vortices, and the vortex loss of the magnetic steel can be reduced. Note that the partition member can approach the central axis with the stress of the mounting frame at the upper limit, which contributes to improving the ability of the mounting frame to withstand the magnetic steel.

[0013] In some embodiments, magnetic steel grooves are provided in a plurality of adjacent mounting regions along the radial direction. A stopper wall is provided in the magnetic steel groove. A partition member is provided between two adjacent magnetic steel grooves. The wall surface of the partition member facing the central axis of the mounting frame is the stopper wall of the magnetic steel groove on the inner side in the radial direction of the partition member.

[0014] By adopting the above technical solution, at least a part of the magnetic steel can be incorporated into the magnetic steel groove, and the partition member can further prevent the centrifugal movement of the magnetic steel in the radial direction. Thereby, the magnetic steel can be firmly constrained in the magnetic steel groove, and thus firmly attached to the mounting frame, which is advantageous for realizing the high rotation speed effect of the motor rotor. And the partition member can further separate the magnetic steel, so that the magnetic steel is divided into a plurality of parts distributed in sequence along the radial direction, which is advantageous for facilitating the mounting of the magnetic steel and reducing the vortex loss.

[0015] In some embodiments, a stopper wall is provided in each mounting region, and the stopper walls of the plurality of mounting regions are distributed at intervals along the radial direction.

[0016] By adopting the above technical solution, the mounting frame can resist the radial centrifugal movement of the magnetic steel by means of stopper walls distributed at intervals along a plurality of radial directions. Thereby, the mounting frame can disperse the acting force applied to the mounting frame by the magnetic steel in the rotation process along the radial direction, that is, the force receiving positions of the mounting frame are dispersed along the radial direction and do not concentrate on one radial position. In this way, the stress at each radial position of the mounting frame can be reduced, whereby the mounting frame can withstand relatively large stress. Furthermore, the mounting reliability between the mounting frame and the magnetic steel is relatively high, and the high rotation speed usage requirements of the motor rotor can be satisfied.

[0017] In some embodiments, magnetic steel grooves are provided in at least one mounting region, and stopper walls are provided in the magnetic steel grooves.

[0018] Installed in this way, on the one hand, the mounting method of the magnetic steel in the mounting frame is sufficiently flexible and can be combined according to actual usage requirements. On the other hand, at least a part of the magnetic steel is installed in the magnetic steel groove, and the circumferential restraint action can be realized by the magnetic steel, which is advantageous for improving the mounting reliability between the magnetic steel and the mounting frame.

[0019] In some embodiments, the outer shape of the magnetic steel is installed to conform to the stopper wall of the magnetic steel groove.

[0020] Installed in this way, in the radial direction, the area of the wall surface for facing the stopper wall of the magnetic steel may be maximally large, that is, the magnetic steel and the stopper wall have a relatively large facing area. In this way, in the rotation process of the motor rotor, the magnetic steel can be completely attached to and in contact with the stopper wall, which is advantageous for improving the resistance ability of the stopper wall to the radial centrifugal movement of the magnetic steel, thereby improving the mounting reliability of the magnetic steel in the mounting frame and being advantageous for realizing the high rotation speed usage requirements of the motor rotor.

[0021] In some embodiments, magnetic steel grooves are provided in a plurality of adjacent mounting regions along the radial direction, two adjacent magnetic steel grooves communicate along the radial direction, and a stopper wall is provided at the communication location of two adjacent magnetic steel grooves.

[0022] By adopting the above technical solution, two adjacent magnetic steel grooves communicate along the radial direction and form a stopper wall at the communication location. When installed in this way, magnetic steel may also be installed at the communication position in the radial direction of two adjacent magnetic steel grooves. This is advantageous for improving the occupied area on one side in the axial direction of the mounting frame of the magnetic steel, that is, a relatively large area of the surface of the magnetic steel in the axial direction can be ensured, the waste of the magnetic steel can be reduced, and it is advantageous for the magnetic steel to drive the mounting frame to rotate together under the action of the stator, thereby improving the output efficiency of power output through the rotating shaft.

[0023] In some embodiments, a first boss is provided on the side wall in the circumferential direction at the communication location of two adjacent magnetic steel grooves, and the wall surface of the first boss facing the central axis of the mounting frame is a stopper wall.

[0024] By adopting the above technical solution, a first boss is provided on the side wall in the circumferential direction at the communication location of two adjacent magnetic steel grooves, and the mounting frame can resist the radial centrifugal movement of the magnetic steel by the stopper wall on the first boss. In this way, while forming the magnetic steel groove on the mounting frame, the formation of the first boss can be realized. Thus, the formation of the first boss and the stopper wall thereon is very simple and easy to achieve.

[0025] In some embodiments, the magnetic steel has an integral structure and has a second boss that is installed to fit the stopper wall. Alternatively, the magnetic steel includes a plurality of blocks, and at least some of the blocks are installed along the radial direction. Among two adjacent blocks in the radial direction, at least one side in the circumferential direction of the inner block in the radial direction forms a third boss that is installed to fit the stopper wall, exceeding the outer block in the radial direction along the circumferential direction.

[0026] By adopting the above technical solution, by integrally installing the magnetic steel to install the second boss, or by installing a plurality of blocks on the magnetic steel to form the third boss due to the size difference in the circumferential direction, the magnetic steel can fit the stopper wall and easily improve the resistance ability of the magnetic steel on the stopper wall to the centrifugal movement in the radial direction.

[0027] In some embodiments, two adjacent magnetic steel grooves are respectively a first magnetic steel groove and a second magnetic steel groove located outside the first magnetic steel groove in the radial direction. The circumferential size outside the second magnetic steel groove in the radial direction is larger than the circumferential size inside the second magnetic steel groove in the radial direction. Opposite sides in the circumferential direction outside the first magnetic steel groove in the radial direction form a first boss, exceeding the inside of the second magnetic steel groove in the radial direction along the circumferential direction.

[0028] Installed in this way, on the one hand, the circumferential size of the second magnetic steel groove is set to increase and decrease in the direction outward in the radial direction. In this way, it is advantageous for the second magnetic steel groove to be laid at the uppermost limit on the mounting frame, and a relatively large area of the surface in the axial direction of the magnetic steel can be ensured. It is advantageous for the magnetic steel to move the mounting frame under the action of the stator and rotate together, thereby improving the output efficiency of outputting power through the rotating shaft. On the other hand, stopper walls can be formed on both opposite sides in the circumferential direction at the communication position between the first magnetic steel groove and the second magnetic steel groove, which contributes to improving the resistance ability of the magnetic steel on the mounting frame to the centrifugal movement in the radial direction and also contributes to improving the stability of the magnetic steel in the magnetic steel groove.

[0029] In some embodiments, a plurality of magnetic steel grooves arranged radially form a first stepped structure axially, and the wall surface facing the central axis of the mounting frame of the first stepped structure is a stopper wall.

[0030] By adopting the above technical solution, multiple positions in the radial direction of the mounting frame can all resist the radial centrifugal movement of the magnetic steel, which is beneficial to the stress distribution in the mounting frame, thereby contributing to improving the resistance ability of the magnetic steel in the mounting frame to the radial centrifugal movement and contributing to the motor rotor meeting the use requirements of high rotational speed. And in the radially outward direction, the axial sizes of the plurality of magnetic steel grooves gradually decrease. In this way, on the one hand, it is beneficial for the center of gravity of the magnetic steel to approach the central axis of the mounting frame, contributing to improving the structural stability of the entire motor rotor. On the other hand, in the radially outward direction, it contributes to increasing the axial size of the mounting frame, thereby contributing to improving the stress that the outer portion of the mounting frame can withstand and contributing to improving the resistance ability of the magnetic steel in the entire mounting frame to the radial centrifugal movement, so that the use requirements of the high rotational speed of the motor rotor can be met.

[0031] In some embodiments, axially, the radial distance of at least a part of the stopper wall from the central axis of the mounting frame is set to gradually increase.

[0032] By adopting the above technical solution, it is beneficial for the center of the magnetic steel to offset towards the central axis of the mounting frame. Accordingly, it is also beneficial to increase the axial size of the outer portion in the radial direction of the mounting frame, thereby being beneficial to improving the resistance of the magnetic steel in the mounting frame to the radial centrifugal movement. In addition, it further facilitates the realization of the mounting operation of the magnetic steel in the mounting frame.

[0033] In some embodiments, the radial distance of at least one stopper wall from the central axis of the mounting frame is greater than or less than the radial distance of the mounting frames of two adjacent stopper walls along the axial direction from the central axis.

[0034] Installing in this way can improve the relative stopper strength in the axial direction between the magnetic steel groove and the mounting frame, contribute to improving the mounting reliability between the mounting frame and the magnetic steel, and further contribute to the motor rotor meeting the usage requirements of high rotational speeds.

[0035] In some embodiments, the mounting frame further includes a base body, the first stepped structure is provided on the base body, and the radial distance of at least one stopper wall from the central axis of the mounting frame is greater than the radial distance of the mounting frame of the stopper wall away from the base body along the axial direction from the central axis.

[0036] Installing in this way can improve the relative stopper strength in the axial direction between the magnetic steel groove and the mounting frame, contribute to improving the mounting reliability between the mounting frame and the magnetic steel, and further contribute to the motor rotor meeting the usage requirements of high rotational speeds.

[0037] In some embodiments, the magnetic steel has an integral structure and forms a second stepped structure adapted to be installed on the stopper wall. Alternatively, the magnetic steel includes a plurality of blocks, at least some of the blocks are installed along the radial direction, and among the plurality of adjacent blocks in the radial direction, at least one side of the inner block in the axial direction extends beyond the outer block in the radial direction along the axial direction to form a third stepped structure adapted to be installed on the stopper wall.

[0038] By adopting the above technical solution, by integrally installing the magnetic steel to form a second stepped structure, or by installing a plurality of blocks on the magnetic steel to form a third stepped structure due to the size difference in the axial direction, the magnetic steel can be adapted to the stopper wall, facilitating the improvement of the resistance ability of the magnetic steel on the stopper wall against the radial centrifugal motion.

[0039] In some embodiments, the mounting frame includes a plurality of frame bodies, and the plurality of frame bodies are connected in sequence to form a first stepped structure.

[0040] By joining the plurality of frame bodies in sequence, the mounting frame can be obtained. Installing in this way facilitates the formation of the first stepped structure on the mounting frame. And the plurality of frame bodies are joined in sequence, facilitating the realization of the oil passage processing process of the motor and having a relatively high degree of freedom in adding oil passages.

[0041] In some embodiments, at least a part of the frame bodies are first frame bodies, the number of the first frame bodies is plural, and the plurality of first frame bodies are peripherally arranged in sequence from the inside to the outside along the radial direction and the axial thickness gradually increases to form a first stepped structure.

[0042] By adopting a plurality of first frame bodies that are annular with different axial thicknesses and arranging the first frame bodies with gradually increasing thicknesses peripherally in sequence along the radial direction, the mounting frame can be obtained. Installing in this way makes the forming operation of the mounting frame sufficiently simple and easy to realize.

[0043] In some embodiments, at least a part of the frame bodies are second frame bodies, and the second frame bodies and the first frame bodies are installed in sequence along the axial direction to form a first stepped structure with the first frame bodies.

[0044] By adopting a first frame body that is sequentially distributed along a plurality of radial directions and a second frame body that is distributed along the axial direction with the first frame body, the plurality of frame bodies are combined and arranged along the axial and radial directions, thereby forming a first step structure, which facilitates obtaining various different types of first step structures and has relatively high flexibility.

[0045] In some embodiments, at least some of the frame bodies are annular third frame bodies, the number of the third frame bodies is plural, the plurality of third frame bodies are sequentially installed along the axial direction, and the inner diameters of at least two adjacent third frame bodies are different, forming a first step structure.

[0046] By adopting a plurality of third frame bodies with at least some different inner diameters and arranging the third frame bodies in sequence along the axial direction, a mounting frame can be obtained. Installed in this way, the forming operation of the mounting frame is very simple and easy to realize. And the positions of the plurality of third frame bodies can be adjusted along the axial direction to obtain different types of first step structures, so that the formation of the mounting frame is very flexible and diverse.

[0047] In some embodiments, at least some of the frame bodies are fourth frame bodies, the fourth frame body includes a receiving member and an annular member provided on the receiving member, the third frame body and the receiving member are sequentially distributed along the axial direction, and the annular member is peripherally provided on the outer side in the radial direction of the plurality of third frame bodies.

[0048] By adopting the above technical solution, the plurality of third frame bodies can realize an axial stopper under the action of the receiving member and can also be constrained along the radial direction under the action of the annular member, thereby improving the overall stability of the mounting frame and contributing to improving the mounting reliability of the mounting frame to the magnetic steel.

[0049] In some embodiments, the frame body is of an integral structure or a split connection structure.

[0050] By installing the frame body in an integral structure, an attachment frame can be constituted by a plurality of integrally installed frame bodies. By installing the frame body in a split connection structure, the frame body can be joined by a plurality of parts, and then a plurality of frame bodies are joined to form an attachment frame. This is advantageous for improving the joining flexibility of the attachment frame and facilitates the constitution of various different types of first step structures.

[0051] In some embodiments, the attachment frame includes fifth frame bodies that are sequentially distributed along a plurality of axial directions. Magnetic steel grooves are provided in the fifth frame bodies, and the stopper walls of the magnetic steel grooves of at least some adjacent fifth frame bodies are installed offset along the radial direction.

[0052] When installed in this way, by opening magnetic steel grooves on each fifth attachment frame and then joining a plurality of fifth attachment frames along the axial direction, an attachment frame capable of dispersing stress along the radial direction can be obtained, which is very convenient and easy to implement.

[0053] In some embodiments, along the radial direction and outward, the circumferential size of each magnetic steel groove is set to gradually increase.

[0054] When installed in this way, from the perspective of the axial direction, each magnetic steel groove may exhibit a shape such as a substantially fan shape or a trapezoid. This is advantageous for laying the magnetic steel grooves on the attachment frame to the maximum limit and contributes to increasing the occupied area on one side in the axial direction of the attachment frame of the magnetic steel. That is, a relatively large area of the surface of the magnetic steel in the axial direction can be ensured, which is advantageous for the magnetic steel to move the attachment frame under the action of the stator and rotate together, thereby improving the output efficiency of outputting power through the rotating shaft.

[0055] In some embodiments, the magnetic steel includes a plurality of blocks, the plurality of blocks are sequentially distributed along the radial direction, and / or the plurality of blocks are sequentially distributed along the axial direction, and / or the plurality of blocks are sequentially distributed along the circumferential direction.

[0056] Installed in this way, the free combination method of the magnetic steel is sufficiently numerous and flexible, which is advantageous for the magnetic steel to be installed in a plurality of mounting areas of the mounting frame, thereby facilitating the mounting frame's stopper wall to realize the resistance effect against the radial centrifugal movement with respect to the mounting area.

[0057] In some embodiments, the blocks adjacent along the radial direction are arranged or adhered with a gap. And / or the blocks adjacent along the circumferential direction are arranged or adhered with a gap.

[0058] By adopting the above technical solution, the magnetic lines of force are difficult to pass through two adjacent blocks arranged or adhered with a gap, the blocks adjacent along the radial direction can form a vortex independently, and the blocks adjacent along the circumferential direction can also form a vortex independently. That is, the vortex formed during the operation of the motor can be reduced, contributing to reducing the vortex loss.

[0059] In some embodiments, the magnetic steel is installed on the surface of the mounting frame in the axial direction, and a stopper wall located outside the magnetic steel in the radial direction is provided on the mounting frame.

[0060] By adopting the above technical solution, a stopper wall located outside the magnetic steel in the radial direction is provided on the mounting frame, and the stopper wall can resist the radial centrifugal movement of the magnetic steel by blocking the magnetic steel inward along the radial direction, whereby the mounting frame has a stress that can withstand a relatively high magnetic steel, and further the motor rotor can meet the usage requirements of a high rotational speed.

[0061] In some embodiments, the mounting frame is a permeable material member, or the mounting frame is a non-permeable material member.

[0062] By adopting the above technical solution, the mounting frame may be a permeable structure or a non-permeable structure. That is, the material of the mounting frame can be selected relatively freely.

[0063] In some embodiments, a plurality of magnetic steels are provided, and the plurality of magnetic steels are sequentially distributed along the circumferential direction on the mounting frame. The mounting frame further includes a plurality of stopper structures sequentially distributed along the circumferential direction, and each magnetic steel is stoppered between two adjacent stopper structures along the circumferential direction.

[0064] Installed in this way, the stopper structure separates two adjacent magnetic steels. In this way, the stopper structure can separate magnetic steels of different magnetic poles, facilitating the magnetic steel to drive the entire motor rotor to rotate under the action of the stator and output power through the rotating shaft.

[0065] In some embodiments, the magnetic steel is fixedly connected to the mounting frame.

[0066] Installed in this way, the relative position between the magnetic steel and the mounting frame is fixed. In this way, the stopper wall resists the radial centrifugal movement of the magnetic steel, and the fixed connection relationship between the magnetic steel and the mounting frame can resist the radial centrifugal movement of the magnetic steel on the mounting frame, contributing to improving the mounting reliability between the mounting frame and the magnetic steel and facilitating the realization of the high rotation speed effect.

[0067] In some embodiments, the magnetic steel is press-fitted with the mounting frame, and / or the magnetic steel is injection-connected with the mounting frame, and / or the magnetic steel is adhesively fixed to the mounting frame.

[0068] By adopting the above technical solution, the magnetic steel and the mounting frame can be fixed by adopting at least one of the methods of interference fit, injection connection, and adhesive fixation, and all of them can have relatively high mounting reliability between the mounting frame and the magnetic steel.

[0069] In some embodiments, the motor rotor further includes a protective member, the magnetic steel is exposed on one or both sides along the axial direction of the mounting frame, and the protective member is provided on the side where the magnetic steel of the mounting frame is exposed.

[0070] When the protective member is installed on the side where the magnetic steel is exposed in the axial direction of the mounting frame, the protective member can realize the protection of the magnetic steel by sealing the magnetic steel together with the mounting frame.

[0071] In some embodiments, the protective member is a magnetic permeable material member.

[0072] Installed in this way, on the one hand, the torque output can be realized by passing the main magnetic field synchronized with the motor rotor. On the other hand, the harmonic magnetic field of the stator is shielded by the magnetic permeability of the protective member to reduce the eddy current loss, and further reduce the eddy current loss of the motor using this motor rotor, and improve the output efficiency of the motor.

[0073] In some embodiments, a positioning groove is provided in the protective member, and at least a part of the magnetic steel is provided in the positioning groove.

[0074] Installed in this way, the groove wall facing the central axis of the mounting frame along the radial direction of the positioning groove can also resist the radial centrifugal movement of the magnetic steel, and thus improve the resistance ability of the magnetic steel of the motor rotor to the radial centrifugal movement, so as to improve the structural stability and reliability of the motor rotor, which is advantageous for realizing the effect of using the motor rotor at a high rotational speed.

[0075] In some embodiments, a plurality of mounting frames are provided and are distributed in sequence along the axial direction, and the protection member is provided between two adjacent mounting frames.

[0076] Installed in this way, by installing the protection member between two adjacent mounting frames, one protection member can achieve the protection effect on the magnetic steel in the two mounting frames, and thus the use of the protection member can be reduced, which is beneficial for realizing the miniaturized design of the motor rotor.

[0077] In some embodiments, a plurality of protection members are provided and are distributed in sequence along the axial direction. A plurality of mounting frames distributed in sequence along the axial direction are installed between two adjacent protection members, and / or one mounting frame is provided between two adjacent protection members, and the magnetic steel is exposed on both sides along the axial direction of the mounting frame.

[0078] Installed in this way, the motor rotor can act on the stators on both opposite sides respectively, facilitating the two stators to drive one motor rotor to rotate and improving the output efficiency.

[0079] According to a second aspect, an embodiment of the present application further provides a motor, which includes a motor rotor.

[0080] The motor according to the embodiment of the present application adopts the motor rotor according to each of the above embodiments, so that the mounting frame can withstand relatively large stress. In this way, the mounting frame and the magnetic steel have relatively high bonding reliability, that is, the motor rotor has relatively high structural reliability, and the problem that the magnetic steel pops out externally when the motor rotor rotates can be improved. Therefore, the motor can meet the use requirements of high rotational speed and has relatively high output efficiency.

[0081] According to a third aspect, an embodiment of the present application further provides a power train, which includes a motor.

[0082] According to the embodiment of the present application, the power train adopts the motor according to each of the above embodiments, so that the motor can meet the use requirement of high rotational speed, has a relatively high output efficiency, and further has a relatively high power output efficiency of the power train.

[0083] According to a fourth aspect, the embodiment of the present application further provides an electric device, which includes a motor or a power train.

[0084] The electric device according to the embodiment of the present application adopts the motor or the power train according to each of the above embodiments, so that the electric device can output power with relatively high efficiency and better meet the use requirements.

[0085] The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification, and in order to make the above and other objects, features and advantages of the present application more clearly understood and easier to understand, hereinafter, specific embodiments of the present application will be specifically described.

Brief Description of the Drawings

[0086] In order to more clearly illustrate the technical solution in the embodiment of the present application, hereinafter, the drawings necessary for use in the embodiment or exemplary technical description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, based on these drawings, other drawings can be obtained without creative efforts.

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Embodiments for Carrying Out the Invention

[0087] Hereinafter, embodiments of the present application will be described in detail. Examples of the above embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Hereinafter, the embodiments described with reference to the drawings are exemplary and for interpreting the present application and should not be construed as a limitation to the present application.

[0088] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship shown based on the drawings, and is only for the convenience of description and simplification of the description of this application, and does not indicate or imply that the mentioned device or element must have a specific orientation and be configured and operated in a specific orientation, so it should not be understood as a limitation to this application.

[0089] It should be noted that the terms "first" and "second" are only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Accordingly, the features limited by "first" and "second" can explicitly or implicitly include one or more of these features.

[0090] In the description of this application, the meaning of "a plurality" is two or more, and unless clearly and specifically limited, "two or more" includes two. Accordingly, the meaning of "a plurality of sets" is two or more sets, including two sets.

[0091] In the description of this application, unless specifically defined and limited, terms such as "attachment", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral one, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a communication inside two elements or an interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to specific situations.

[0092] In the description of this application, the term "and / or" is merely used to describe the relevant relationship of the relevant object, indicating that three relationships can exist. For example, A and / or B may represent three cases: A, the combination of A and B, and B. Also, in this application, the character " / " generally represents that the relevant objects before and after are in an "or" relationship.

[0093] In the description of the embodiments of this application, unless otherwise clearly defined and limited, the technical terms "proximity" and "adjacency" refer to approaching in terms of position. For example, for three members A1, A2, and B, if the distance between A1 and B is greater than the distance between A2 and B, then compared with A1, A2 is closer to B, that is, A2 is in proximity to B, which means B is in proximity to A2. In other words, A2 and B are adjacent. Also, for example, when there are multiple C members, and the multiple C members are C1, C2... CN respectively, if one of the C members, for example C2, is closer to the B member than other C members, then B is in proximity to C2, that is, C2 is in proximity to B. In other words, C2 and B are adjacent.

[0094] In related technologies, a motor rotor generally includes a mounting frame and magnetic steel provided on the mounting frame.

[0095] In some cases, the mounting frame has a relatively small stress tolerance for the magnetic steel. Specifically, when the motor rotor rotates, the magnetic steel generates a relatively large centrifugal force and has a tendency of relatively large radial centrifugal motion. Due to the relatively weak coupling ability between the magnetic steel and the mounting frame, it is difficult for the mounting frame to effectively resist the radial centrifugal motion of the magnetic steel. That is, the mounting frame has a relatively small stress tolerance for the magnetic steel, and furthermore, there is a risk that the magnetic steel will break through the coupling relationship with the mounting frame and fly out externally, making it difficult to meet the high rotational speed requirements of the motor rotor.

[0096] In some examples, for the surface-type motor rotor, the magnetic steel is adhered to the surface in the axial direction of the mounting frame, specifically by using a liquid adhesive or a fixed adhesive to achieve adhesion. In terms of the adhesion method, since the adhesion strength is inherently limited, when the motor rotor rotates at a high speed, there is a risk that the magnetic steel will fly outwards due to the radial centrifugal motion.

[0097] Based on the above considerations, the embodiments of the present application provide a motor rotor, a motor, a power train, and an electric device. By installing a stopper wall on the mounting frame to resist the radial centrifugal motion of the magnetic steel, after the magnetic steel is attached to the mounting frame, the mounting frame can further resist the radial centrifugal motion of the magnetic steel by the stopper wall. That is, the stopper wall can share the stress caused by the radial centrifugal motion of the magnetic steel on the mounting frame, whereby the mounting frame can withstand relatively large stress, and thereby the mounting frame and the magnetic steel have relatively high bonding reliability, and the problem that the magnetic steel flies outwards when the motor rotor rotates can be improved, and the motor rotor can meet the use requirements of high rotational speed.

[0098] The motor mentioned in the embodiments of the present application is also referred to as an electric motor. Generally, the motor is composed of two parts: a motor rotor and a stator. The motor is a device that converts electrical energy into mechanical energy. Specifically, the motor uses an energized coil to generate a rotating magnetic field that acts on the motor rotor to form a magneto-electro-dynamic rotational torque. The fixed part in the motor is called the stator, and the rotating part in the motor is called the motor rotor.

[0099] Here, the motor may be divided into a radial motor and an axial motor. The radial motor refers to a motor in which the stator and the motor rotor are arranged along the radial direction. For example, the stator is located on the outer periphery of the motor rotor, that is, the stator is fitted on the outer periphery of the motor rotor, or the motor rotor is located in the motor on the outer periphery of the stator, that is, the motor rotor is fitted on the outer periphery of the stator. The axial motor refers to a motor in which the stator and the motor rotor are arranged along the axial direction.

[0100] The motor rotor according to the embodiment of the present application can be applied to a motor. Specifically, the motor rotor can be used for an axial motor. Of course, if the structure of the motor rotor meets the usage requirements of a radial motor, it can also be applied to a radial motor.

[0101] The motor mentioned in the embodiment of the present application can be applied to a power train as a power source, and can also be applied to an electric device as a power source. The power train mentioned in the embodiment of the present application can also be applied to an electric device as a power source.

[0102] The electric device may be, but is not limited to, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, a steamship, an aircraft, etc. The electric toy may include a stationary or mobile electric toy. For example, it may be a game console, an electric vehicle toy, an electric steamship toy, and an electric airplane toy, etc. The aircraft may include an airplane, a rocket, a space shuttle, and a spaceship, etc.

[0103] The electric device may further be a vehicle or a vehicle chassis. The vehicle may be a fuel oil vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. Here, the motor may be integrated with one or several of devices such as a power source, a controller, and a gearbox to form a power train.

[0104] For the sake of easy explanation, the case where the electric device is a vehicle in the embodiment of the present application will be taken as an example for explanation.

[0105] Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application. The power train 1000 is installed inside the vehicle, and the power train 1000 may be installed at the bottom, head or tail of the vehicle. The power train 1000 may be used to enhance the power of the vehicle.

[0106] In some embodiments, the power train 1000 may include a motor 100, and the motor 100 serves as the power source of the power train 1000. As can be understood, the power train 1000 is not limited to the application in vehicles, and may further be applied to electric devices that need to output other powers.

[0107] In some embodiments, the power train 1000 may further include a controller 400 and a battery 300. The controller 400 is used to control the operation of the power train 1000. For example, it controls the start, shift and stop of the power train 1000, specifically, controls the start, shift and stop of the motor 100. The controller 400 may further be used to control the battery 300 to supply power to the power train 1000. Specifically, it controls the battery 300 to supply power to the motor 100, and is used, for example, for the operating power consumption requirements during the start, navigation and driving of the vehicle.

[0108] In some embodiments, the power train 1000 may further include a transmission 200. The transmission 200 is connected to the axial motor to realize the torque change of the axial motor. The transmission 200 (Transmission) is also referred to as a gearbox, and is a mechanism for changing the rotational speed and torque from the engine. It can fix or stepwise change the transmission ratio between the output shaft and the input shaft.

[0109] In some embodiments, the controller 400 can be integrated with the motor 100 to form the power train 1000. The battery 300 can also be integrated with the motor 100 to form the power train 1000. Further, the transmission 200 and the controller 400 can be integrated with the motor 100 to form the power train 1000. Further, the transmission 200, the controller 400, and the battery 300 can be integrated with the axial motor to form the power train 1000. Of course, in some embodiments, the power train 1000 may further integrate other structures, such as a cooling oil circuit and the like.

[0110] For ease of explanation, in the embodiments of the present application, an example will be given where the motor 100 is an axial motor.

[0111] Referring to FIGS. 2 to 5 together, FIGS. 2 to 5 respectively show schematic structural diagrams of the motor 100 according to multiple embodiments of the present application. The motor 100 according to the embodiments of the present application includes a rotating shaft 30, a stator 20, and a motor rotor 10. The motor rotor 10 is fixedly mounted on the rotating shaft 30, and the stator 20 is located on the side surface of the motor rotor 10. Specifically, the stator 20 and the motor rotor 10 are sequentially arranged along the axial direction Z.

[0112] The rotating shaft 30 refers to an axial structure for outputting power in the motor 100. The rotating shaft 30 is fixedly connected to the motor rotor 10, so that the rotating shaft 30 can be driven by the motor rotor 10 to rotate and output power.

[0113] The stator 20 and the rotating shaft 30 can rotate relative to each other, and further, the stator 20 and the motor rotor 10 can rotate relative to each other. For example, in some embodiments, the stator 20 may be supported on the rotating shaft 30 by bearings. Also, for example, in some embodiments, when the motor 100 includes a case, the stator 20 may be fixed on the case, the case supports the stator 20, and the motor rotor 10 and the rotating shaft 30 are rotatably mounted in the case, so that the stator 20 and the motor rotor 10 can rotate relative to each other, facilitating the stator 20 to drive the motor rotor 10 to rotate.

[0114] The stator 20 is located on the side surface of the motor rotor 10 and is located on one side in the axial direction Z of the motor rotor 10 of the stator 20. Thereby, the stator 20 drives the motor rotor 10 to rotate and further moves the rotating shaft 30 to rotate.

[0115] Here, when the energized coil in the stator 20 is energized, a magnetic field can be generated and acts on the motor rotor 10 to form a magneto-electro-dynamic rotational torque, thereby realizing the rotation of the motor rotor 10, further moving the rotating shaft 30 to rotate together, and outputting power through the rotating shaft 30.

[0116] In some embodiments, referring to FIG. 2, the motor rotor 10 may be one, and the stator 20 may be one. The stator 20 is located on one side in the axial direction Z of the motor rotor 10. This motor 100 has a simple structure and a small volume.

[0117] In some embodiments, referring to FIG. 3, the motor 100 includes two stators 20 and one motor rotor 10. The two stators 20 are located on opposite sides in the axial direction Z of the motor rotor 10. By driving the same motor rotor 10 to rotate by the two stators 20 in this way, the output power can be increased, and the structure of such a motor 100 is more compact.

[0118] In some embodiments, referring to FIG. 4, the motor 100 includes two motor rotors 10 and one stator 20. The two motor rotors 10 are located on opposite sides in the axial direction Z of the stator 20, and both of the two motor rotors 10 are fixedly connected to the rotation shaft 30. In this way, the same two motor rotors 10 can be driven to rotate by one stator 20, and the same rotation shaft 30 can be moved to rotate, so as to increase the output power, and the structure of such a motor 100 is more compact.

[0119] In some embodiments, referring to FIG. 5, the motor 100 includes a plurality of motor rotors 10 and a plurality of stators 20. The plurality of motor rotors 10 and the plurality of stators 20 are arranged along the axial direction Z. A stator 20 is provided between two adjacent motor rotors 10 along the axial direction Z, and a motor rotor 10 is provided between two adjacent stators 20 along the axial direction Z. The plurality of stators 20 drive the plurality of motor rotors 10 to rotate, and further move the rotation shaft 30 to rotate, so as to increase the output power.

[0120] Supplementary to be explained, the axial direction Z refers to the axial direction Z of the rotation shaft 30, that is, the direction of the central axis of the rotation shaft 30. The axial direction Z of the rotation shaft 30 is also the axial direction Z of the stator 20 and the axial direction Z of the motor rotor 10. Therefore, the axial direction Z also refers to the axial direction Z of the motor rotor 10.

[0121] The radial direction Y refers to the radial direction Y of the rotation shaft 30, that is, the radial direction of the rotation shaft 30. The radial direction Y of the rotation shaft 30 is also the radial direction Y of the stator 20 and the radial direction Y of the motor rotor 10. Therefore, the radial direction Y also refers to the radial direction Y of the motor rotor 10. Here, the radial direction Y of the motor rotor 10 is perpendicular to the axial direction Z of the motor rotor 10.

[0122] The circumferential direction X refers to the circumferential direction around the axial direction Z of the rotation shaft 30, and is also the direction around the axial direction Z of the motor rotor 10. Here, the circumferential direction X of the motor rotor 10 is perpendicular to the axial direction Z of the motor rotor 10.

[0123] Here, in the descriptions of the motor 100 and the motor rotor 10 in the foregoing and subsequent texts, the related axial direction Z, circumferential direction X, and radial direction Y also have the same meanings, and will not be repeatedly interpreted.

[0124] Referring to both FIG. 6 and FIG. 7, FIG. 6 and FIG. 7 are perspective structural diagrams of the motor rotor 10 of two embodiments of the present application, respectively. The motor rotor 10 according to the embodiment of the present application includes a mounting frame 11 and a magnetic steel 12. The magnetic steel 12 is attached to the mounting frame 11. A stopper wall 101 is provided on the mounting frame 11, and the stopper wall 101 is used to resist the centrifugal movement of the magnetic steel 12 in the radial direction Y.

[0125] The mounting frame 11 refers to a rack structure for fixing and supporting the magnetic steel 12 in the motor rotor 10.

[0126] The mounting frame 11 is fixedly connected to the rotating shaft 30 of the motor 100 to realize the fixed connection effect between the motor rotor 10 and the rotating shaft 30. The mounting frame 11 has a central axis L extending along the axial direction Z, and the mounting frame 11 can move and rotate the rotating shaft 30 by rotating about the central axis L. Here, the mounting frame 11 is installed coaxially with the rotating shaft 30. Specifically, the central axis L of the mounting frame 11 is installed overlapping the rotation axis line of the rotating shaft 30.

[0127] In some possible designs, in order to easily realize the stable rotation of the mounting frame 11, the mounting frame 11 may be installed in a disk-shaped structure. Based on this, the mounting frame 11 also has a circumferential direction X, an axial direction Z, and a radial direction Y corresponding to the motor rotor 10. Here, the axial direction Z of the mounting frame 11 is parallel to the thickness direction of the mounting frame 11.

[0128] The magnetic steel 12 refers to a magnetic material for providing a magnetic field in the motor rotor 10. Here, the magnetic steel 12 generally refers to an aluminum nickel cobalt alloy and is synthesized from a plurality of hard and strong metals. As an example, the magnetic steel 12 may be synthesized from iron and aluminum, nickel, cobalt, etc. As an example, the magnetic steel 12 may be synthesized from copper, niobium, tantalum, etc. When the motor 100 operates, the stator 20 is energized to generate a magnetic field and acts on the magnetic steel 12, so that the magnetic steel 12 moves and rotates the mounting frame 11, and further moves and rotates the rotating shaft 30, thereby outputting power through the rotating shaft 30.

[0129] The stopper wall 101 refers to the wall surface in the mounting frame 11. The stopper wall 101 is installed toward the central axis L of the mounting frame 11, that is, the stopper wall 101 is not parallel to the radial direction Y. In this way, the stopper wall 101 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by preventing the magnetic steel 12 from moving toward the central axis L of the mounting frame 11. Here, in some possible designs, the stopper wall 101 can face the central axis L of the mounting frame 11 along the radial direction Y, that is, the stopper wall 101 is perpendicular to the radial direction Y. In some possible designs, the stopper wall 101 can also be directed toward the central axis L of the mounting frame 11 along a direction intersecting the radial direction Y, that is, the stopper wall 101 intersects the radial direction Y.

[0130] According to an embodiment of the present application, for the motor rotor 10, by installing the stopper wall 101 on the mounting frame 11, after the magnetic steel 12 is attached to the mounting frame 11, the mounting frame 11 can further resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the stopper wall 101. That is, when the magnetic steel 12 is attached to the mounting frame 11, the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y due to the coupling relationship with the magnetic steel 12. And the mounting frame 11 can further resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the stopper wall 101, whereby the stopper wall 101 can share the stress caused by the centrifugal movement of the magnetic steel 12 in the radial direction Y of the mounting frame 11, and further the mounting frame 11 can withstand a relatively large stress. In this way, the mounting frame 11 and the magnetic steel 12 have relatively high coupling reliability, and the problem that the magnetic steel 12 pops out externally when the motor rotor 10 rotates can be improved. Therefore, the motor rotor 10 can meet the use requirements of high rotational speed.

[0131] Here, the distribution form of the magnetic steel 12 may be various, and one or more magnetic steels 12 may be installed.

[0132] In some embodiments, the plurality of magnetic steels 12 may be sequentially distributed on the mounting frame 11 along the circumferential direction X, specifically located at the outer peripheral position of the rotating shaft 30. In some possible examples, among the plurality of magnetic steels 12, one magnetic steel 12 may correspond to one magnetic pole, and may be a south pole (S pole) or a north pole (N pole). And the magnetic steels 12 of different magnetic poles are arranged offset along the circumferential direction X, that is, the distribution situation of the plurality of magnetic steels 12 in the circumferential direction X is: south pole magnetic steel 12, north pole magnetic steel 12, south pole magnetic steel 12, north pole magnetic steel 12... and so on by analogy. In some possible examples, each magnetic steel 12 has magnetic poles with opposite polarities, namely a south pole (S pole) and a north pole (N pole) respectively.

[0133] In some embodiments, the plurality of magnetic steels 12 may be sequentially distributed along the radial direction Y on the mounting frame 11. In some possible examples, one magnetic steel 12 may correspond to one magnetic pole, and may be a south pole (S pole) or a north pole (N pole), and the magnetic steels 12 of different magnetic poles are arranged offset along the radial direction Y. In some possible designs, each magnetic steel 12 has magnetic poles with opposite polarities.

[0134] In some embodiments, referring to FIGS. 7 to 10 together, FIGS. 7 to 9 respectively show exploded views of the structure of the motor rotor 10 according to three embodiments of the present application, and FIG. 10 is a schematic structural view of the mounting frame 11 of the motor rotor 10 according to some embodiments of the present application. A plurality of mounting regions 102 are provided on the mounting frame 11, and the plurality of mounting regions 102 are sequentially distributed along the radial direction Y. The magnetic steels 12 are mounted on the plurality of mounting regions 102 sequentially distributed along the radial direction Y, and at least one of the mounting regions 102 is provided with the stopper wall 101.

[0135] The mounting region 102 refers to the position defined on the mounting frame 11 for mounting the magnetic steel 12. In some examples, as shown in FIGS. 7 to 9, the mounting region 102 may be the surface on the mounting frame 11 for mounting the magnetic steel 12. In some examples, as shown in FIGS. 9 and 10, the mounting region 102 may further be a magnetic steel groove 1021 on the mounting frame 11 for mounting the magnetic steel 12.

[0136] The magnetic steel 12 at the same circumferential direction X position refers to one magnetic steel 12. In this way, one magnetic steel 12 may be simultaneously mounted on a plurality of mounting regions 102 sequentially distributed along the radial direction Y. That is, the magnetic steel 12 may be mounted by dividing regions along the radial direction Y, and thus is mounted on the mounting frame 11.

[0137] The stopper wall 101 is installed in some of the plurality of mounting areas 102. As shown in FIGS. 8 and 9, this part of the mounting area 102 may be one mounting area 102 or a plurality of mounting areas 102, or, among the plurality of mounting areas 102, the stopper areas are installed in all of the mounting areas 102, as shown in FIGS. 7 and 10.

[0138] By dividing the mounting frame 11 into a plurality of mounting areas 102 and providing the stopper wall 101 in at least one mounting area 102, on the one hand, the magnetic steel 12 can be mounted by dividing regions in the radial direction Y, which is advantageous for improving the mounting reliability with the mounting frame 11, and thereby is advantageous for improving the stress that the mounting frame 11 can withstand against the magnetic steel 12. On the other hand, after the magnetic steel 12 is mounted in the plurality of mounting areas 102, the centrifugal movement of the magnetic steel 12 in the radial direction Y can be further resisted by the stopper wall 101, and by improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, the stress that the mounting frame 11 can withstand against the magnetic steel 12 can be improved. When installed in this way, the mounting frame 11 has a relatively large withstandable stress and can meet the high rotational speed requirements of the motor rotor 10.

[0139] In some embodiments, referring to both FIGS. 9 and 10, a magnetic steel groove 1021 is provided in at least one mounting area 102, and the stopper wall 101 is provided in the magnetic steel groove 1021.

[0140] The magnetic steel groove 1021 may be installed in some of the plurality of mounting areas 102 installed along the radial direction Y. As shown in FIG. 9, the number of this part of the mounting area 102 may be one or more. Or, among the plurality of mounting areas 102, the stopper areas are installed in all of the mounting areas 102, as shown in FIG. 10.

[0141] When the magnetic steel groove 1021 is installed in some of the mounting areas 102 and the number of the mounting areas 102 in this part is plural, that is, the number of the magnetic steel grooves 1021 is plural. The plurality of magnetic steel grooves 1021 may be continuously arranged along the radial direction Y, or there may be a mounting area 102 where no magnetic steel groove 1021 is installed between two adjacent magnetic steel grooves 1021 along the radial direction Y.

[0142] As shown in FIG. 9, as an example, the mounting frame 11 is divided into two mounting areas 102 arranged in sequence along the radial direction Y. The mounting area 102 inside the radial direction Y has a magnetic steel groove 1021, and no magnetic steel groove 1021 is installed in the mounting area 102 outside the radial direction Y.

[0143] Here, the outside of the radial direction Y refers to the side close to the outer edge of the mounting frame 11 in the radial direction Y. For example, the mounting area 102 outside the radial direction Y refers to the mounting area 102 that is relatively close to the outer edge of the mounting frame 11 in the radial direction Y among the two mounting areas 102. Correspondingly, the inside of the radial direction Y refers to the side close to the central axis L of the mounting frame 11 in the radial direction Y. For example, the mounting area 102 inside the radial direction Y refers to the mounting area 102 that is relatively far from the outer edge of the mounting frame 11 in the radial direction Y among the two mounting areas 102.

[0144] Here, the magnetic steel groove 1021 may be installed on one side in the axial direction Z of the mounting frame 11 and is a concave groove, that is, one side along the axial direction Z of the mounting frame 11 has an opening 103 communicating with the magnetic steel groove 1021. Or, the magnetic steel groove 1021 may be installed as a through groove penetrating the mounting frame 11 along the axial direction Z, that is, both opposite sides along the axial direction Z of the mounting frame 11 have openings 103 communicating with the magnetic steel groove 1021. Or, the magnetic steel groove 1021 is a concave groove, and both opposite sides in the axial direction Z of the mounting frame 11 have the magnetic steel groove 1021, that is, both opposite sides along the axial direction Z of the mounting frame 11 have openings 103 communicating with the magnetic steel groove 1021.

[0145] The magnetic steel groove 1021 has a groove wall, and the wall surface facing the central axis L of the mounting frame 11 along the radial direction Y of the magnetic steel groove 1021 is the stopper wall 101 of the magnetic steel groove 1021, that is, the stopper wall 101 of the corresponding mounting region 102.

[0146] By adopting the above technical solution, a part of the magnetic steel 12 in its radial direction Y can be incorporated into the magnetic steel groove 1021, and another part can be installed on the surface corresponding to the mounting region 102 of the mounting frame 11, or all of it in its radial direction Y can be installed to be incorporated into the magnetic steel groove 1021. When installed in this way, on the one hand, the mounting method of the magnetic steel 12 on the mounting frame 11 is quite flexible and can be combined according to actual usage requirements. On the other hand, at least a part of the magnetic steel 12 is installed in the magnetic steel groove 1021, and the restraint effect in the circumferential direction X can be realized by the magnetic steel 12, which is advantageous for improving the mounting reliability between the magnetic steel 12 and the mounting frame 11. Here, the axial direction Z of the part of the magnetic steel 12 corresponding to the magnetic steel groove 1021 is partially or entirely incorporated into the magnetic steel groove 1021.

[0147] Here, as a supplementary explanation, it is the case where the magnetic steel groove 1021 is not installed on the mounting frame 11, or the magnetic steel groove 1021 is installed on the mounting frame 11 and the magnetic steel groove 1021 is a concave groove. Based on this, both opposite sides of the mounting frame 11 in the axial direction Z can be divided into mounting regions 102 distributed in sequence along a plurality of radial directions Y. It is the case where the magnetic steel groove 1021 is installed on the mounting frame 11 and the magnetic steel groove 1021 is a through groove. Based on this, one side of the mounting frame 11 in the axial direction Z can be divided into mounting regions 102 distributed in sequence along a plurality of radial directions Y.

[0148] In some embodiments, referring to FIG. 10, magnetic steel grooves 1021 are provided in a plurality of adjacent mounting regions 102 along the radial direction Y, and a stopper wall 101 is provided in the magnetic steel grooves 1021.

[0149] As can be understood, among the plurality of adjacent mounting regions 102 along the radial direction Y, magnetic steel grooves 1021 are provided in at least some of the mounting regions 102, and the number of at least some of the mounting regions 102 is plural. That is, the plurality of magnetic steel grooves 1021 are arranged continuously along the radial direction Y, whereby the mounting frame 11 has stopper walls 101 arranged at plural intervals in the radial direction Y. Here, at least some of these mounting regions 102 may be all of the plurality of mounting regions 102 distributed in order along the radial direction Y, or may be a part thereof.

[0150] By adopting the above technical solution, the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the plurality of stopper walls 101 distributed at intervals along the radial direction Y, whereby the mounting frame 11 can disperse the acting force applied to the mounting frame 11 by the magnetic steel 12 along the radial direction Y during the rotation process, that is, the force-receiving positions of the mounting frame 11 are dispersed along the radial direction Y and do not concentrate at one position in the radial direction Y. In this way, the stress at each position in the radial direction Y of the mounting frame 11 can be reduced, whereby the mounting frame 11 can withstand a relatively large stress, and furthermore, the mounting reliability between the mounting frame 11 and the magnetic steel 12 is relatively high, and the high rotation speed usage requirements of the motor rotor 10 can be satisfied.

[0151] In some embodiments, referring to FIGS. 8 to 10 together, a partition member 111 is provided between two adjacent mounting regions 102 along the radial direction Y, and the wall surface of the partition member 111 facing the central axis L of the mounting frame 11 is the stopper wall 101.

[0152] As can be understood, in two adjacent mounting regions 102 along the radial direction Y, the wall surface facing the central axis L of the mounting frame 11 of the partition member 111 is the stopper wall 101 of the inner mounting region 102 in the radial direction Y.

[0153] By installing the partition member 111 between two adjacent mounting regions 102 in the radial direction Y, the partition member 111 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the stopper wall 101, thereby improving the problem that the magnetic steel 12 pops out externally during the rotation process of the motor rotor 10. And the partition member 111 can further separate the magnetic steel 12, that is, the magnetic steel 12 can be divided into a plurality of parts distributed in sequence along the radial direction Y by the partitioning action of the partition member 111. In this way, each part of the magnetic steel 12 may be individually mounted in the mounting region 102. On the one hand, the magnetic steel 12 is mounted by dividing regions, which is advantageous for improving the mounting reliability of the magnetic steel 12 in the mounting frame 11. On the other hand, it facilitates the mounting operation of the magnetic steel 12 in the mounting frame 11. On the other hand, the mounting flexibility of the magnetic steel 12 in the mounting frame 11 is relatively high. For example, a part of the magnetic steel 12 may be mounted in the magnetic steel groove 1021, and another part may be mounted on the surface in the axial direction Z of the mounting frame 11. In addition, the partition member 111 can divide the magnetic steel 12 into a plurality of parts distributed in sequence along the radial direction Y, whereby the plurality of parts of the magnetic steel 12 can form a spiral with the cooperation of the stator 20 respectively, that is, form a plurality of small spirals, and the spiral loss of the magnetic steel 12 can be reduced.

[0154] Note that the partition member 111 is installed between two adjacent attachment regions 102, and by resisting the centrifugal movement of the magnetic steel 12 in the radial direction Y by the stopper wall 101, the stress on the attachment frame 11 caused by the centrifugal movement of the magnetic steel 12 can be minimized and brought closer to the central axis L of the attachment frame 11. In this way, the partition member 111 contributes to improving the stress that the attachment frame 11 can withstand against the magnetic steel 12, and further contributes to realizing the use requirement of the high rotational speed of the motor rotor 10.

[0155] Here, each part of the magnetic steel 12 may include at least one block 121 mentioned below.

[0156] In some embodiments, referring to FIG. 10, the partition member 111 is provided between two adjacent magnetic steel grooves 1021 along the radial direction Y, and the wall surface of the partition member 111 facing the central axis L of the attachment frame 11 is the stopper wall 101 of the magnetic steel groove 1021 inside the partition member 111 in the radial direction Y.

[0157] As can be understood, the partition member 111 separates two adjacent magnetic steel grooves 1021 in the radial direction Y, and the wall surface of the partition member 111 facing the central axis L of the attachment frame 11 is the groove wall of the magnetic steel groove 1021 facing the central axis L of the attachment frame 11, that is, the stopper wall 101 of the magnetic steel groove 1021 inside the radial direction Y.

[0158] By adopting the above technical solution, the partition member 111 separates two adjacent magnetic steel grooves 1021 along the radial direction Y. In this way, not only can at least a part of the magnetic steel 12 be incorporated into the magnetic steel groove 1021, but the partition member 111 can further prevent the centrifugal movement of the magnetic steel 12 in the radial direction Y. Thereby, the magnetic steel 12 can be firmly constrained within the magnetic steel groove 1021, and thus firmly attached to the mounting frame 11, which is advantageous for realizing the high rotational speed effect of the motor rotor 10. And the partition member 111 can further separate the magnetic steel 12, whereby the magnetic steel 12 is divided into a plurality of parts distributed in sequence along the radial direction Y, which is advantageous for facilitating the attachment of the magnetic steel 12 and reducing the eddy current loss.

[0159] In some embodiments, as shown in FIGS. 7 and 8, a partition member 111 may also be installed between the mounting regions 102 where two adjacent magnetic steel grooves 1021 are not installed.

[0160] In some embodiments, as shown in FIG. 9, among two adjacent mounting regions 102, a magnetic steel groove 1021 is not installed in one of the mounting regions 102, and the other mounting region 102 has a magnetic steel groove 1021. A partition member 111 may also be installed between these two mounting regions 102. The mounting region 102 having the magnetic steel groove 1021 may be located outside the mounting region 102 without the magnetic steel groove 1021 in the radial direction Y, or may be located inside the mounting region 102 without the magnetic steel groove 1021 in the radial direction Y. Here, when the mounting region 102 having the magnetic steel groove 1021 is located inside the mounting region 102 without the magnetic steel groove 1021 in the radial direction Y, the stopper wall 101 of the partition member 111 is a groove wall facing the central axis L of the mounting frame 11 of the magnetic steel groove 1021.

[0161] In some embodiments, referring to both FIGS. 6 and 7, the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z, and a stopper wall 101 located outside the magnetic steel 12 in the radial direction Y is provided on the mounting frame 11.

[0162] The magnetic steel 12 is provided on one surface of the mounting frame 11 in the axial direction Z, or the magnetic steel 12 is provided on both opposite surfaces of the mounting frame 11 in the axial direction Z.

[0163] On one surface of the mounting frame 11 along the axial direction Z, a fence member 115 may be installed at a position approaching the outer edge of the mounting frame 11 along the radial direction Y or at the outer edge of the mounting frame 11. The fence member 115 is located outside the magnetic steel 12 in the radial direction Y, and the wall surface of the fence member 115 facing the central axis L of the mounting frame 11 along the radial direction Y is a stopper wall 101. The stopper wall 101 in this fence member 115 is used to resist the centrifugal movement of the magnetic steel 12 in the radial direction Y. Here, the fence member 115 may have a sleeve-like structure. The sleeve-like structure is fitted on the outer periphery of a plurality of magnetic steels 12. A plurality of fence members 115 may be installed. The plurality of fence members 115 are sequentially distributed along the circumferential direction X and are provided around the outer periphery of the plurality of magnetic steels 12. Here, the fence member 115 and other parts of the mounting frame 11 may have an integral connection structure or a split connection structure.

[0164] By adopting the above technical solution, a stopper wall 101 located outside the magnetic steel 12 in the radial direction Y is provided on the mounting frame 11. The stopper wall 101 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by blocking the magnetic steel 12 inward along the radial direction Y. Thereby, the mounting frame 11 has a stress that can withstand a relatively high magnetic steel 12, and further, the motor rotor 10 can meet the usage requirement of a high rotation speed.

[0165] In some embodiments, referring to both FIGS. 6 and 7, among the plurality of mounting regions 102, a magnetic steel groove 1021 is not provided in the outermost mounting region 102 in the radial direction Y. That is, in this mounting region 102, the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z. By installing the fence member 115 at a position close to the outer edge of the mounting frame 11 in the radial direction Y or on the outer edge of the mounting frame 11, the stopper wall 101 of the fence member 115 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y in the outermost mounting region 102 in the radial direction Y. Here, the outermost mounting region 102 in the radial direction Y refers to the mounting region 102 closest to the outer edge of the mounting frame 11 in the radial direction Y.

[0166] Here, in the solution where the magnetic steel 12 is installed on the surface along the axial direction Z of the mounting frame 11, the mounting frame 11 may resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the fence member 115, or may resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the partition member 111 between the mounting region 102 and the mounting region 102. That is, a stopper wall 101 may be installed in each mounting region 102, so that the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the plurality of stopper walls 101 distributed at intervals along the radial direction Y. Thereby, the mounting frame 11 can disperse the acting force applied by the magnetic steel 12 to the mounting frame 11 in the radial direction Y during the rotation process along the radial direction Y. That is, the force-receiving position of the mounting frame 11 is dispersed along the radial direction Y and does not concentrate at one position in the radial direction Y. In this way, the stress at each position in the radial direction Y of the mounting frame 11 can be reduced, so that the mounting frame 11 can withstand a relatively large stress. Furthermore, the mounting reliability between the mounting frame 11 and the magnetic steel 12 is relatively high, and the high rotation speed use requirements of the motor rotor 10 can be satisfied.

[0167] In some embodiments, referring to FIG. 10, among the plurality of mounting regions 102, the mounting region 102 closest to the outer edge of the mounting frame 11 along the radial direction Y has a magnetic steel groove 1021, and the groove wall of the magnetic steel groove 1021 facing the central axis L of the mounting frame 11 is the stopper wall 101 of this corresponding mounting region 102.

[0168] In some embodiments, referring to both FIG. 7 and FIG. 10, a stopper wall 101 is provided in each mounting region 102, and the stopper walls 101 of the plurality of mounting regions 102 are distributed at intervals along the radial direction Y.

[0169] It should be noted that for the outermost mounting region 102 in the radial direction Y, when a magnetic steel groove 1021 is installed in this mounting region 102, the groove wall of the magnetic steel groove 1021 facing the central axis L of the mounting frame 11 is the stopper wall 101 of this mounting region 102. When a magnetic steel groove 1021 is not installed in this mounting region 102, the above-mentioned fence member 115 may be installed, and the wall surface of the fence member 115 facing the central axis L of the mounting frame 11 is the stopper wall 101 of this mounting region 102.

[0170] Furthermore, it should be noted that for the mounting region 102 that is not the outermost in the radial direction Y, the wall surface of the partition member 111 facing the central axis L of the mounting frame 11 is the stopper wall 101 of the mounting region 102 inside in the radial direction Y. And when the mounting region 102 has a magnetic steel groove 1021, the groove wall of the magnetic steel groove 1021 facing the central axis L of the mounting frame 11 is the stopper wall 101 of this mounting region 102, and it is also the stopper wall 101 in the partition member 111 between this mounting region 102 and the mounting region 102 outside in the radial direction Y.

[0171] By adopting the above technical solution, among the plurality of mounting regions 102 sequentially distributed along the radial direction Y, each mounting region 102 has a stopper wall 101. In this way, the mounting frame 11 has a plurality of stopper walls 101 sequentially distributed along the radial direction Y, so that the plurality of stopper walls 101 sequentially distributed along the radial direction Y can all act as stoppers for the magnetic steel 12 and can all resist the centrifugal movement of the magnetic steel 12 in the radial direction Y. That is, the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the plurality of stopper walls 101 distributed at intervals along the radial direction Y, whereby the mounting frame 11 can disperse the acting force applied to the mounting frame 11 by the magnetic steel 12 along the radial direction Y during the rotation process, that is, the force receiving positions of the mounting frame 11 are dispersed along the radial direction Y and do not concentrate at one position in the radial direction Y. In this way, the stress at each position in the radial direction Y of the mounting frame 11 can be reduced, whereby the mounting frame 11 can withstand relatively large stresses, and furthermore, the mounting reliability between the mounting frame 11 and the magnetic steel 12 is relatively high, and the high rotation speed usage requirements of the motor rotor 10 can be satisfied.

[0172] In some embodiments, the outer shape of the magnetic steel 12 is installed to fit the stopper wall 101 of the magnetic steel groove 1021.

[0173] As can be understood, the wall surface for facing the stopper wall 101 of the magnetic steel 12 is parallel to the stopper wall 101, so that the outer shape of the magnetic steel 12 fits the stopper wall 101.

[0174] When installed in this way, in the radial direction Y, the area of the wall surface facing the stopper wall 101 of the magnetic steel 12 may be as large as the upper limit, that is, the magnetic steel 12 and the stopper wall 101 have a relatively large facing area. In this way, in the rotation process of the motor rotor 10, the magnetic steel 12 can be completely attached to and abutted against the stopper wall 101, which is advantageous for improving the resistance ability of the stopper wall 101 to the centrifugal movement of the magnetic steel 12 in the radial direction Y. Thereby, the mounting reliability of the magnetic steel 12 in the mounting frame 11 can be improved, which is advantageous for realizing the use requirement of the high rotation speed of the motor rotor 10.

[0175] In some embodiments, referring to FIGS. 11 to 17 together, FIGS. 11 to 14 and 17 respectively show schematic structural views of the mounting frame 11 of the motor rotor 10 according to multiple embodiments of the present application, and FIGS. 15 and 16 show schematic views of the magnetic steel 12 of the motor rotor 10 according to two embodiments of the present application. Two adjacent magnetic steel grooves 1021 along the radial direction Y communicate with each other along the radial direction Y, and a stopper wall 101 is provided at the communication location of the two adjacent magnetic steel grooves 1021 along the radial direction Y.

[0176] As can be understood, the two adjacent magnetic steel grooves 1021 along the radial direction Y may be the first magnetic steel groove 1021a and the second magnetic steel groove 1021b respectively, and the second magnetic steel groove 1021b is located outside the first magnetic steel groove 1021a in the radial direction Y. And the inside of the second magnetic steel groove 1021b in the radial direction Y communicates with the outside of the first magnetic steel groove 1021a in the radial direction Y along the radial direction Y to realize the communication effect of the two adjacent magnetic steel grooves 1021 in the radial direction Y. And a stopper wall 101 is formed at the communication position of the two adjacent magnetic steel grooves 1021, and this stopper wall 101 is the stopper wall 101 of the magnetic steel groove 1021 inside the radial direction Y.

[0177] By adopting the above technical solution, two adjacent magnetic steel grooves 1021 communicate with each other along the radial direction Y, and a stopper wall 101 is formed at the communication position. When installed in this way, magnetic steel 12 may also be installed at the communication position of two adjacent magnetic steel grooves 1021 in the radial direction Y. This is advantageous for improving the occupied area on one side of the mounting frame 11 of the magnetic steel 12 in the axial direction Z, that is, a relatively large area of the surface of the magnetic steel 12 in the axial direction Z can be ensured, the waste of the magnetic steel 12 can be reduced, and it is advantageous for the magnetic steel 12 to move the mounting frame 11 under the action of the stator 20 and rotate together, thereby improving the output efficiency of power output through the rotating shaft 30.

[0178] In some embodiments, referring to FIGS. 11 to 14 together, a first boss 112 is provided on the side wall in the circumferential direction X at the communication position of two adjacent magnetic steel grooves 1021, and the wall surface of the first boss 112 facing the central axis L of the mounting frame 11 is the stopper wall 101.

[0179] It should be noted that since the magnetic steel groove 1021 is installed on the side part of the mounting frame 11 in the axial direction Z, both the one side and the opposite two sides in the circumferential direction X of the magnetic steel groove 1021 have side walls. In this way, both the one side or the opposite two sides in the circumferential direction X at the communication position of two adjacent magnetic steel grooves 1021 also have side walls.

[0180] A first boss 112 is provided on the side wall in the circumferential direction X at the communication position of two adjacent magnetic steel grooves 1021. A first boss 112 may also be provided on one side wall in the circumferential direction X at the communication position of two adjacent magnetic steel grooves 1021, as shown in FIG. 14. First bosses 112 may be provided on both opposite side walls in the circumferential direction X at the communication position of two adjacent magnetic steel grooves 1021. As shown in FIGS. 11 to 13, in this way, the facing area between the magnetic steel 12 and the stopper wall 101 can be increased, which is advantageous for improving the resistance ability of the stopper wall 101 to the centrifugal movement of the magnetic steel 12 in the radial direction Y, thereby improving the mounting reliability between the magnetic steel 12 and the mounting frame 11.

[0181] For better understanding, among a plurality of mounting regions 102 sequentially distributed along the radial direction Y, magnetic steel grooves 1021 are formed in three or more adjacent mounting regions 102. Two adjacent magnetic steel grooves 1021 communicate with each other along the radial direction Y, and a first boss 112 is provided on one side wall in the circumferential direction X of the communication position. Based on this, on one side wall in the circumferential direction X, the mounting frame 11 can form a plurality of first bosses 112 sequentially arranged along the radial direction Y.

[0182] Here, when first bosses 112 are provided on both opposite side walls in the circumferential direction X at the communication location of two adjacent magnetic steel grooves 1021, the stopper walls 101 on the first bosses 112 of these two opposite side walls may be located at the same position in the radial direction Y. Of course, they may also be distributed at intervals along the radial direction Y. This contributes to better dispersing the stress of the mounting frame 11 along the radial direction Y, and improves the resistance of the magnetic steel 12 in the mounting frame 11 to centrifugal movement in the radial direction Y.

[0183] The first boss 112 refers to a portion protruding from the circumferential direction X of the communication location of two adjacent magnetic steel grooves 1021. The first boss 112 may have a stepped structure, specifically, it may be a square step or a serrated step. The first boss 112 may also be a sheet-like, block-like or other shaped structure that extends out. It should be noted that a step refers to a structure having two adjacent step surfaces. Among the two step surfaces of the step, one of the step surfaces is the stopper wall 101. As an example, when the first boss 112 is a square step, the two step surfaces are perpendicular to each other. As an example, when the first boss 112 is a serrated step, the two step surfaces are not perpendicular.

[0184] The first boss 112 has a wall surface facing the central axis L of the mounting frame 11, and the wall surface of the first boss 112 facing the central axis L of the mounting frame 11 is the stopper wall 101 of the magnetic steel groove 1021 inside the radial direction Y.

[0185] By adopting the above technical solution, a first boss 112 is provided on the side wall in the circumferential direction X of the communication part of two adjacent magnetic steel grooves 1021, and the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the stopper wall 101 on the first boss 112. In this way, while forming the magnetic steel groove 1021 on the mounting frame 11, the formation of the first boss 112 can be realized. Thus, the formation of the first boss 112 and the stopper wall 101 thereon is quite simple and easy to achieve.

[0186] In addition, the first boss 112 and other parts of the mounting frame 11 may be integrally connected or separately connected.

[0187] In some embodiments, referring to FIG. 15 and combining with other drawings, the magnetic steel 12 has an integral structure, and the magnetic steel 12 has a second boss 1211 installed to fit the stopper wall 101.

[0188] It should be noted that when the first boss 112 is installed on one side wall in the circumferential direction X of the communication part of two adjacent magnetic steel grooves 1021, the second boss 1211 is installed on one side wall of the magnetic steel 12 in the circumferential direction X. When the first bosses 112 are installed on both opposite side walls in the circumferential direction X of the communication part of two adjacent magnetic steel grooves 1021, the second bosses 1211 are installed on both opposite side walls of the magnetic steel 12 in the circumferential direction X.

[0189] The outer shape of the second boss 1211 fits the stopper wall 101 of the first boss 112. Specifically, the wall surface of the second boss 1211 for facing the stopper wall 101 of the first boss 112 is parallel to this stopper wall 101. That is, the wall surface of the second boss 1211 for facing the stopper wall 101 of the first boss 112 has a relatively large area. In other words, the magnetic steel 12 and the stopper wall 101 of the first boss 112 have a relatively large facing area.

[0190] Here, the portion that protrudes and is installed on one side or both opposite sides in the circumferential direction X of the magnetic steel 12 is the second boss 1211.

[0191] When installed in this way, a second boss 1211 for fitting to the stopper wall 101 of the first boss 112 is integrally installed on the magnetic steel 12. In the rotation process of the motor rotor 10, the stopper wall 101 on the first boss 112 can realize the resistance to the centrifugal movement in the radial direction Y of the magnetic steel 12 by abutting against the second boss 1211. In this way, since the second boss 1211 has relatively high structural strength, the mounting frame 11 can relatively well resist the centrifugal movement in the radial direction Y of the magnetic steel 12 under the condition that the stopper wall 101 abuts against the second boss 1211 in the rotation process.

[0192] In some embodiments, referring to FIG. 16 and in conjunction with other drawings, the magnetic steel 12 includes a plurality of blocks 121, and at least some of the blocks 121 are sequentially installed along the radial direction Y. Among two adjacent blocks 121 in the radial direction Y, at least one side in the circumferential direction X of the block 121 inside in the radial direction Y forms a third boss 1212 that fits to the stopper wall 101 and extends beyond the block 121 outside in the radial direction Y along the circumferential direction X.

[0193] It should be noted that when the first boss 112 is installed on one side wall in the circumferential direction X at the communication location of two adjacent magnetic steel grooves 1021, among two adjacent blocks 121 in the radial direction Y, one side in the circumferential direction X of the block 121 inside in the radial direction Y forms a third boss 1212 that extends beyond the block 121 outside in the radial direction Y along the circumferential direction X, and the two adjacent blocks 121 have a size difference in the circumferential direction X. The other side in the circumferential direction X of the block 121 inside in the radial direction Y may extend beyond or be lower than the block 121 outside in the radial direction Y along the circumferential direction X. Consequently, the other sides in the circumferential direction X of the two adjacent blocks 121 may be installed flush.

[0194] Furthermore, it should be further explained that when the first bosses 112 are installed on both opposite side walls in the circumferential direction X at the communication portion of two adjacent magnetic steel grooves 1021, among two adjacent blocks 121 in the radial direction Y, both opposite sides in the circumferential direction X of the block 121 on the inner side in the radial direction Y exceed the outside of the block 121 on the outer side in the radial direction Y along the circumferential direction X. That is, two adjacent blocks 121 along the radial direction Y may be the first block 121a and the second block 121b respectively. The second block 121b is located outside the first block 121a in the radial direction Y, and the size of the circumferential direction X outside the first block 121a in the radial direction Y is larger than the size of the circumferential direction X inside the second block 121b in the radial direction Y. In this way, two adjacent blocks 121 along the radial direction Y can form the third boss 1212 due to the size difference in the circumferential direction X.

[0195] Here, the size of the circumferential direction X outside the first block 121a in the radial direction Y is size H10, and the size of the circumferential direction X inside the second block 121b in the radial direction Y is size H11.

[0196] Here, the portion where the block 121 on the inner side in the radial direction Y exceeds the block 121 on the outer side in the radial direction Y along the circumferential direction X may be the third boss 1212.

[0197] Here, the outer shape of the third boss 1212 conforms to the stopper wall 101 of the first boss 112. Specifically, the wall surface of the third boss 1212 for facing the stopper wall 101 of the first boss 112 is parallel to this stopper wall 101, so that the area of the wall surface of the third boss 1212 for facing the stopper wall 101 of the first boss 112 becomes the largest at the upper limit, and furthermore, the facing area between the magnetic steel 12 and the stopper wall 101 of the first boss 112 is relatively large.

[0198] By having two adjacent blocks 121 along the radial direction Y have a size difference in the circumferential direction X, a third boss 1212 is formed. In the rotation process of the motor rotor 10, the stopper wall 101 of the first boss 112 can abut against the third boss 1212 to realize resistance to the centrifugal movement of the magnetic steel 12 in the radial direction Y. Then, the magnetic steel 12 is divided into a plurality of blocks 121, which facilitates the flexible assembly of the magnetic steel 12 in the magnetic steel groove 1021 and realizes the matching effect between the third boss 1212 and the stopper wall 101 of the first boss 112.

[0199] By adopting the above technical solution, by installing the magnetic steel 12 integrally to install the second boss 1211, or by installing a plurality of blocks 121 on the magnetic steel 12 to form a third boss 1212 due to the size difference in the circumferential direction X, the magnetic steel 12 can be adapted to the stopper wall 101 and it is easy to improve the resistance ability of the stopper wall 101 to the centrifugal movement of the magnetic steel 12 in the radial direction Y.

[0200] In some embodiments, referring to both FIGS. 11 to 13, two adjacent magnetic steel grooves 1021 along the radial direction Y are the first magnetic steel groove 1021a and the second magnetic steel groove 1021b respectively, and the second magnetic steel groove 1021b is located outside the first magnetic steel groove 1021a in the radial direction Y. The circumferential X size outside the second magnetic steel groove 1021b in the radial direction Y is larger than the circumferential X size inside the second magnetic steel groove 1021b in the radial direction Y, and both opposite sides in the circumferential X outside the first magnetic steel groove 1021a in the radial direction Y exceed the inside and outside of the second magnetic steel groove 1021b in the radial direction Y along the circumferential direction X to form the first boss 112.

[0201] As can be understood, in the distribution direction of the second magnetic steel groove 1021b and the first magnetic steel groove 1021a, that is, in the direction inward of the radial direction Y, the circumferential direction X size of the second magnetic steel groove 1021b is set to be reduced. Specifically, the circumferential direction X size outside the radial direction Y of the second magnetic steel groove 1021b is approximately size H1, and the circumferential direction X size inside the radial direction Y of the second magnetic steel groove 1021b is approximately H2, and size H1 is larger than size H2. Based on this, the groove formed by combining and communicating the first magnetic steel groove 1021a and the second magnetic steel groove 1021b presents a shape designed with a constriction in the middle in the radial direction Y. That is, from the perspective in the axial direction Z, the second magnetic steel groove 1021b may present a shape such as a trapezoid or a sector.

[0202] The circumferential direction X size outside the radial direction Y of the first magnetic steel groove 1021a is larger than the circumferential direction X size inside the radial direction Y of the second magnetic steel groove 1021b, and both opposite sides in the circumferential direction X outside the radial direction Y of the first magnetic steel groove 1021a exceed the inside of the radial direction Y of the second magnetic steel groove 1021b along the circumferential direction X, so that both opposite sides in the circumferential direction X of the communication position between the first magnetic steel groove 1021a and the second magnetic steel groove 1021b form the first boss 112. Here, the circumferential direction X size outside the radial direction Y of the first magnetic steel groove 1021a is approximately size H3, and size H3 is larger than size H2.

[0203] When installed in this way, on the one hand, the size of the second magnetic steel groove 1021b in the circumferential direction X is set to increase and decrease in the direction outward in the radial direction Y. In this way, it is advantageous for the second magnetic steel groove 1021b to be laid on the attachment frame 11 at the uppermost limit, and it contributes to increasing the occupied area on one side in the axial direction Z of the attachment frame 11 of the magnetic steel 12. That is, a relatively large area of the surface of the magnetic steel 12 in the axial direction Z can be ensured, which is advantageous for the magnetic steel 12 to move the attachment frame 11 under the action of the stator 20 and rotate together, thereby improving the output efficiency of outputting power through the rotating shaft 30. On the other hand, stopper walls 101 are formed on both opposite sides in the circumferential direction X of the communication position between the first magnetic steel groove 1021a and the second magnetic steel groove 1021b, which contributes to improving the resistance ability of the magnetic steel 12 on the attachment frame 11 against the centrifugal movement in the radial direction Y, and also contributes to improving the stability of the magnetic steel 12 in the magnetic steel groove 1021.

[0204] In some embodiments, referring to FIGS. 17 to 20 together and in conjunction with other drawings, FIGS. 17 to 20 show schematic views of the attachment frame 11 of the motor rotor 10 according to four embodiments of the present application. A first step structure 1101 is formed in the axial direction Z of a plurality of magnetic steel grooves 1021 arranged in the radial direction Y, and the wall surface of the first step structure 1101 facing the central axis L of the attachment frame 11 is the stopper wall 101.

[0205] The first step structure 1101 refers to a structure similar to a stepped shape. The first step structure 1101 may include at least one step, and the step refers to a structure having step surfaces that form an angle greater than 0° with each other between two adjacent ones. Here, the step may be a rectangular step, a serrated step, or even a step of other shapes. For a rectangular step, two adjacent step surfaces may be perpendicular to each other. For a serrated step, two adjacent step surfaces may not be perpendicular.

[0206] Among the first step structures 1101 formed in the axial direction Z, one step surface of a single step faces the central axis L of the mounting frame 11 along the substantially radial direction Y. This step surface is the stopper wall 101 of the magnetic steel groove 1021 inside the radial direction Y, and the other step surface is installed substantially along the axial direction Z.

[0207] When the first step structure 1101 formed in the axial direction Z includes multiple steps, as shown in FIGS. 17 to 20, they are arranged in sequence along the axial direction Z in the multiple steps. Based on this, the stopper walls 101 formed by the multiple steps are distributed in sequence along the axial direction Z, and at least some of the stopper walls 101 formed by the multiple steps are distributed at intervals along the radial direction Y.

[0208] In the first step structure 1101, a single step is formed on the side wall in the axial direction Z at the communication position of two adjacent magnetic steel grooves 1021 along the radial direction Y. The stopper wall 101 of this step is the stopper wall 101 of the magnetic steel groove 1021 inside the radial direction Y.

[0209] By adopting the above technical solution, at least a part of the plurality of magnetic steel grooves 1021 arranged side by side along the radial direction Y and formed in the axial direction Z of the first step structure 1101, that is, the mounting frame 11, is the first step structure 1101, and the wall surface facing the central axis L of the mounting frame 11 of the first step structure 1101 is the stopper wall 101. Thereby, the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y by the stopper wall 101 in the first step structure 1101. By installing the first step structure 1101, the first step structure 1101 has at least two stopper walls 101 distributed in sequence along the radial direction Y. In this way, multiple positions in the radial direction Y of the mounting frame 11 can all resist the centrifugal movement of the magnetic steel 12 in the radial direction Y, which is beneficial to the stress distribution in the mounting frame 11, thereby contributing to improving the resistance ability of the mounting frame 11 to the centrifugal movement of the magnetic steel 12 in the radial direction Y and contributing to the motor rotor 10 meeting the use requirements of high rotational speed.

[0210] And, since the first stepped structure 1101 is formed in the axial direction Z by the magnetic steel grooves 1021 arranged along a plurality of radial directions Y, among the plurality of magnetic steel grooves 1021 distributed in order along the radial direction Y, the size of the magnetic steel groove 1021 on the inner side of the radial direction Y in the axial direction Z is larger than the size of the magnetic steel groove 1021 on the outer side of the radial direction Y in the axial direction Z. That is, in the direction outward in the radial direction Y, the size of the plurality of magnetic steel grooves 1021 in the axial direction Z gradually decreases. In this way, on the one hand, it is advantageous for the center of gravity of the magnetic steel 12 to approach the central axis L of the mounting frame 11, contributing to improving the structural stability of the entire motor rotor 10. On the other hand, in the direction outward in the radial direction Y, it contributes to increasing the size of the mounting frame 11 in the axial direction Z, thus contributing to improving the stress that the portion outside the radial direction Y of the mounting frame 11 can withstand, and contributing to improving the resistance ability of the entire mounting frame 11 to the centrifugal movement of the magnetic steel 12 in the radial direction Y, so that the use requirement of the high rotational speed of the motor rotor 10 can be satisfied.

[0211] In some embodiments, referring to both FIGS. 17 to 19 and in conjunction with other drawings, in the axial direction Z, the distance in the radial direction Y of at least a part of the stopper wall 101 from the central axis L of the mounting frame 11 is set to gradually increase.

[0212] As can be understood, in the first stepped structure 1101 composed of a plurality of magnetic steel grooves 1021, the plurality of stopper walls 101 are distributed in order along the axial direction Z. In this way, in the direction along the axial direction Z toward one side, the distance in the radial direction Y of at least a part of the stopper walls 101 distributed in order along the axial direction Z from the central axis L of the mounting frame 11 is set to gradually increase.

[0213] As shown in FIG. 19, the distance in the radial direction Y of one of the stopper walls 101 from the central axis L of the mounting frame 11 is size H4, and the same is true for the distance in the radial direction Y of the other stopper walls 101 from the central axis L of the mounting frame 11.

[0214] In some possible designs, as shown in FIGS. 17 and 18, in the direction along the axial direction Z towards one side, the radial distance in the Y direction of all the stopper walls 101 from the central axis L of the mounting frame 11 is set to increase gradually. In some possible designs, as shown in FIG. 19, in the direction along the axial direction Z towards one side, the radial distance in the Y direction of some of the stopper walls 101 from the central axis L of the mounting frame 11 is set to increase gradually.

[0215]

[0214] By adopting the above technical solution, the radial distance in the Y direction of at least a part of the mounting frame 11 of the stopper wall 101 is set to increase gradually. When the magnetic steel 12 fits into the magnetic steel groove 1021, in the direction outward in the Y direction, the axial size in the Z direction of the magnetic steel 12 can be made smaller with a relatively large width. In this way, it is advantageous for the center of the magnetic steel 12 to offset towards the central axis L of the mounting frame 11, and accordingly, it is also advantageous to increase the axial size in the Z direction of the outer part of the mounting frame 11 in the Y direction, thereby improving the resistance of the mounting frame 11 to the centrifugal movement of the magnetic steel 12 in the Y direction.

[0216] It should be noted that at least one side of the mounting frame 11 along the axial direction Z has an opening 103, and this opening 103 communicates with the magnetic steel groove 1021. When installed in this way, the magnetic field lines generated by the motor rotor 10 can pass through the magnetic steel 12 in the magnetic steel groove 1021 along the axial direction Z.

[0217] As shown in FIGS. 17 and 18, in the direction along the axial direction Z towards one side, the radial distance in the Y direction of all the stopper walls 101 from the central axis L of the mounting frame 11 is set to increase gradually. When installed in this way, the opening 103 in the axial direction Z of the mounting frame 11 may be enlarged to the uppermost limit, thus facilitating the installation of the magnetic steel 12 in the magnetic steel groove 1021.

[0218] In some embodiments, referring to FIG. 19 and in conjunction with other drawings, the distance in the radial direction Y from the central axis L of the mounting frame 11 of at least one stopper wall 101 is greater than the distance in the radial direction Y from the central axis L of the mounting frames 11 of two adjacent stopper walls 101 along the axial direction Z.

[0219] It should be noted that among the first step structures 1101 formed by the multiple magnetic steel grooves 1021, the plurality of stopper walls 101 in the first step structure 1101 are distributed in order along the axial direction Z, and the number of stopper walls 101 distributed in order along the axial direction Z is at least three.

[0220] As shown in FIG. 19, three adjacent stopper walls 101 along the axial direction Z may be defined as the first stopper wall 101a, the second stopper wall 101b, and the third stopper wall 101c, respectively. The distance in the radial direction Y from the central axis L of the mounting frame 11 of the first stopper wall 101a is size H4, the distance in the radial direction Y from the central axis L of the mounting frame 11 of the second stopper wall 101b is size H5, and the distance in the radial direction Y from the central axis L of the mounting frame 11 of the third stopper wall 101c is size H6. Size H5 is greater than size H4 and size H6.

[0221] By adopting the above technical solution, the first step structure 1101 has a fourth stopper wall 104 adjacent to the first stopper wall 101a, and further has a fourth stopper wall 104 adjacent to the third stopper wall 101c. These two fourth stopper walls 104 are distributed at intervals along the axial direction Z, and are respectively the opposite side walls in the axial direction Z of the magnetic steel groove 1021 where the second stopper wall 101b is located. When installed in this way, at least a part of the magnetic steel 12 can be stopped between these two fourth stopper walls 104 distributed at intervals along the axial direction Z, that is, at least a part of the magnetic steel 12 can be stopped in at least one magnetic steel groove 1021 along the axial direction Z. In this way, the relative stopper strength in the axial direction Z between the magnetic steel groove 1021 and the mounting frame 11 can be improved, which contributes to improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, and further contributes to the motor rotor 10 meeting the use requirements of high rotational speed.

[0222] In some embodiments, referring to FIG. 20 and in conjunction with other drawings, the distance in the radial direction Y of at least one stopper wall 101 from the central axis L of the mounting frame 11 is smaller than the distance in the radial direction Y of two adjacent stopper walls 101 along the axial direction Z from the central axis L of the mounting frame 11.

[0223] It should be noted that among the first step structures 1101 formed by a plurality of magnetic steel grooves 1021, the plurality of stopper walls 101 in the first step structure 1101 are distributed in sequence along the axial direction Z, and the number of stopper walls 101 distributed in sequence along the axial direction Z is at least three.

[0224] As shown in FIG. 20, three adjacent stopper walls 101 along the axial direction Z may be defined as the fifth stopper wall 101d, the sixth stopper wall 101e, and the seventh stopper wall 101f, respectively. The distance in the radial direction Y of the fifth stopper wall 101d from the central axis L of the mounting frame 11 is size H7, the distance in the radial direction Y of the mounting frame 11 of the sixth wall from the central axis L is size H8, and the distance in the radial direction Y of the mounting frame 11 of the seventh stopper wall 101f from the central axis L is size H9. Size H8 is smaller than size H7 and size H9.

[0225] By adopting the above technical solution, the first step structure 1101 has two eighth stopper walls 105 adjacent to the sixth stopper wall 101e, and the two eighth stopper walls 105 are respectively located on opposite sides along the axial direction Z of the sixth stopper wall 101e. When installed in this way, a part of the magnetic steel 12 may be located on the side away from the second eighth stopper wall 105 along the axial direction Z of the first eighth stopper wall 105, and another part of the magnetic steel 12 may be located on the side away from the first eighth stopper wall 105 along the axial direction Z of the second eighth stopper wall 105. When installed in this way, a relative stopper in the axial direction Z between the magnetic steel groove 1021 and the mounting frame 11 can be realized, which contributes to improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, and further contributes to the motor rotor 10 meeting the use requirements of high rotational speed.

[0226] In some embodiments, referring to FIG. 20 and in conjunction with other drawings, the mounting frame 11 further includes a base body 113g, and the first step structure 1101 is provided on the base body 113g. The distance in the radial direction Y of at least one stopper wall 101 from the central axis L of the mounting frame 11 is greater than the distance in the radial direction Y of the mounting frame 11 of the stopper wall 101 away from the base body 113g along the axial direction Z.

[0227] It should be noted that among the first stepped structure 1101 formed by a plurality of magnetic steel grooves 1021, a plurality of stopper walls 101 in the first stepped structure 1101 are distributed in order along the axial direction Z, and the number of stopper walls 101 distributed in order along the axial direction Z is at least two.

[0228] As shown in FIG. 20, the first stepped structure 1101 is provided on one side of the substrate 113g in the axial direction Z. Alternatively, the first stepped structure 1101 is installed on both opposite sides of the substrate 113g in the axial direction Z.

[0229] Here, the substrate 113g and the first stepped structure 1101 may be integrally connected or separately connected. If the mounting frame 11 further has other parts, the substrate 113g, the first stepped structure 1101 and the other parts of the mounting frame 11 may be integrally connected or separately connected.

[0230] As shown in FIG. 20, two adjacent stopper walls 101 along the axial direction Z are respectively defined as the fifth stopper wall 101d and the sixth stopper wall 101e. In the axial direction Z, the fifth stopper wall 101d is located between the sixth stopper wall 101e and the substrate 113g. That is, with respect to the fifth stopper wall 101d, the stopper wall 101 that is away from the substrate 113g along the axial direction Z is the sixth stopper wall 101e. Here, the distance in the radial direction Y of the fifth stopper wall 101d with respect to the central axis L of the mounting frame 11 is size H7, and the distance in the radial direction Y of the sixth wall with respect to the central axis L of the mounting frame 11 is size H8. Size H8 is smaller than size H7.

[0231] By adopting the above technical solution, the first step structure 1101 has an eighth stopper wall 105 adjacent to the sixth stopper wall 101e. The eighth stopper wall 105 is provided between the fifth stopper wall 101d and the sixth stopper wall 101e and is distributed at intervals along the axial direction Z with the base 113g. When installed in this way, the wall surfaces along the axial direction Z of the eighth stopper wall 105 and the base 113g facing the eighth stopper wall 105 may be the opposite both side walls in the axial direction Z of the magnetic steel groove 1021 where the fifth stopper wall 101d is located. When installed in this way, at least a part of the magnetic steel 12 can be stoppered between the base 113g and the eighth stopper wall 105 along the axial direction Z, that is, at least a part of the magnetic steel 12 can be stoppered in at least one magnetic steel groove 1021 along the axial direction Z. In this way, the relative stopper strength in the axial direction Z between the magnetic steel groove 1021 and the mounting frame 11 can be improved, which contributes to improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, and further contributes to the motor rotor 10 meeting the use requirements of high rotational speed. And after only two stopper walls 101 distributed in sequence along the radial direction Y are installed on the mounting frame 11, it can also achieve the effect of dispersing the stress of the mounting frame 11 along the radial direction Y, and further improve the stopper in the axial direction Z between the mounting frame 11 and the magnetic steel 12, thereby improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, and it can be applied to the mounting frame 11 with a relatively small thickness and where it is difficult to install a plurality of stopper walls 101 in the axial direction Z.

[0232] In some embodiments, referring to FIG. 21 and in conjunction with other drawings, FIG. 21 shows a schematic structural view of the magnetic steel 12 of the motor rotor 10 according to some embodiments of the present application. The magnetic steel 12 has an integral structure, and the magnetic steel 12 forms a second step structure 1201, and the second step structure 1201 is installed to fit the stopper wall 101.

[0233] The second step structure 1201 refers to a structure similar to a stepped shape. The second step structure 1201 may include at least one step, and the step is a structure having two step surfaces that form an included angle greater than 0° with each other adjacently. Here, the step may be a rectangular step, a serrated step, or even a step of other shapes. For a rectangular step, two adjacent step surfaces may be perpendicular to each other. For a serrated step, two adjacent step surfaces may not be perpendicular.

[0234] The magnetic steel 12 may form the second step structure 1201 on one side in the axial direction Z, or may form the second step structure 1201 on both opposite sides in the axial direction Z. The second step structure 1201 formed by the magnetic steel 12 only needs to be able to fit the stopper wall 101.

[0235] The outer shape of the second step structure 1201 fits the stopper wall 101 of the first step structure 1101. Specifically, the second step structure 1201 has a wall surface for facing the stopper wall 101 of the first step structure 1101, and the wall surface of the second step structure 1201 for facing the stopper wall 101 of the first step structure 1101 is parallel to this corresponding stopper wall 101. That is, the wall surface of the second step structure 1201 for facing the stopper wall 101 in the first step structure 1101 has a relatively large area. In other words, the magnetic steel 12 and the stopper wall 101 in the first step structure 1101 have a relatively large facing area.

[0236] When installed in this way, a second stepped structure 1201 for fitting to the stopper wall 101 of the first stepped structure 1101 is integrally installed on the magnetic steel 12. In the rotation process of the motor rotor 10, the stopper wall 101 in the first stepped structure 1101 can realize the resistance to the centrifugal movement of the magnetic steel 12 in the radial direction Y by abutting against the second stepped structure 1201. In this way, since the second stepped structure 1201 has relatively high structural strength, the mounting frame 11 can relatively well resist the centrifugal movement of the magnetic steel 12 in the radial direction Y under the condition that the stopper wall 101 abuts against the second stepped structure 1201 in the rotation process.

[0237] In some embodiments, the second stepped structure 1201 also has a wall surface facing substantially along the axial direction Z. The wall surface facing along the axial direction Z of the second stepped structure 1201 may fit to the stepped surface that is not the stopper wall 101 in the first stepped structure 1101. Specifically, the wall surface facing along the axial direction Z of the second stepped structure 1201 may be parallel to the stepped surface that is not the stopper wall 101 in the first stepped structure 1101, thus facilitating both attachments. When installed in this way, it contributes to the outer shape of the entire magnetic steel 12 fitting to the internal shape of the magnetic steel 12, which is advantageous for improving the reliability of the magnetic steel 12 being incorporated into the magnetic steel groove 1021.

[0238] In some embodiments, referring to FIG. 22 and in conjunction with other drawings, FIG. 22 shows a schematic structural view of the magnetic steel 12 of the motor rotor 10 according to some embodiments of the present application. The magnetic steel 12 includes a plurality of blocks 121, and at least some of the blocks 121 are sequentially installed along the radial direction Y. Among the plurality of adjacent blocks 121 in the radial direction Y, at least one side in the axial direction Z of the block 121 inside in the radial direction Y forms a third stepped structure 1202 that extends beyond the block 121 outside in the radial direction Y along the axial direction Z. Here, the third stepped structure 1202 is installed to fit the stopper wall 101.

[0239] It should be noted that two adjacent blocks 121 in the radial direction Y may be installed as follows. One side of the block 121 inside the radial direction Y in the axial direction Z extends beyond the outside of the block 121 outside the radial direction Y along the axial direction Z, and the two adjacent blocks 121 have a size difference in the axial direction Z. Based on this, the other side of the block 121 inside the radial direction Y in the axial direction Z may extend beyond or be lower than the block 121 outside the radial direction Y along the axial direction Z. As a result, the other sides of the two adjacent blocks 121 in the axial direction Z may be installed flush.

[0240] It should be further noted that two adjacent blocks 121 in the radial direction Y may be installed as follows. Both opposite sides of the block 121 inside the radial direction Y in the axial direction Z extend beyond the outside of the block 121 outside the radial direction Y along the axial direction Z. That is, the two adjacent blocks 121 along the radial direction Y may be the first block 121a and the second block 121b respectively. The second block 121b is located outside the radial direction Y of the first block 121a, and the axial size outside the radial direction Y of the first block 121a is larger than the axial size inside the radial direction Y of the second block 121b. The two adjacent blocks 121 have a size difference in the axial direction Z.

[0241] It should be further noted that among a plurality of adjacent blocks 121 along the radial direction Y, every two adjacent blocks 121 may have a height difference, and in this way, the plurality of blocks 121 form the above-mentioned third step structure 1202.

[0242] The outer shape of the third step structure 1202 conforms to the stopper wall 101 of the first step structure 1101. Specifically, the third step structure 1202 has a wall surface for facing the stopper wall 101 of the first step structure 1101, and the wall surface of the third step structure 1202 for facing the stopper wall 101 of the first step structure 1101 is parallel to this corresponding stopper wall 101. That is, the wall surface of the third step structure 1202 for facing the stopper wall 101 in the first step structure 1101 has a relatively large area. In other words, the magnetic steel 12 and the stopper wall 101 in the first step structure 1101 have a relatively large facing area.

[0243] A plurality of adjacent blocks 121 along the radial direction Y have size differences in the axial direction Z, thereby forming the third step structure 1202. In the rotation process of the motor rotor 10, the stopper wall 101 of the first step structure 1101 can realize the resistance to the centrifugal movement of the magnetic steel 12 in the radial direction Y by abutting against the third step structure 1202. And the magnetic steel 12 is divided into a plurality of blocks 121, which facilitates the flexible assembly of the magnetic steel 12 in the magnetic steel groove 1021 and realizes the matching effect between the third step structure 1202 and the stopper wall 101 in the first step structure 1101.

[0244] As an example, in order to conform to the first step structure 1101 shown in FIGS. 17 and 18, in the direction along the axial direction Z towards one side, the distance in the radial direction Y of all the stopper walls 101 from the central axis L of the mounting frame 11 is set to gradually increase. Correspondingly, in the direction outward in the radial direction Y, the size of the magnetic steel 12 in the axial direction Z is set to decrease.

[0245] In some embodiments, the third stepped structure 1202 also has a wall surface facing along the substantially axial direction Z. The wall surface facing along the axial direction Z of the third stepped structure 1202 may conform to the stepped surface that is not the stopper wall 101 in the first stepped structure 1101. Specifically, the wall surface facing along the axial direction Z of the third stepped structure 1202 may be parallel to the stepped surface that is not the stopper wall 101 in the first stepped structure 1101, thus facilitating both attachments. Installing in this way contributes to the outer shape of the entire magnetic steel 12 conforming to the internal shape of the magnetic steel 12 and is advantageous for improving the reliability of the magnetic steel 12 being incorporated into the magnetic steel groove 1021.

[0246] By adopting the above technical solution, by integrally installing the magnetic steel 12 to form the second stepped structure 1201, or installing a plurality of blocks 121 on the magnetic steel 12 to form the third stepped structure 1202 due to the size difference in the axial direction Z, the magnetic steel 12 can conform to the stopper wall 101 and easily improve the resistance ability of the magnetic steel 12 against the centrifugal motion in the radial direction Y of the stopper wall 101.

[0247] In some embodiments, referring to FIG. 23 and in conjunction with other drawings, FIG. 23 shows a schematic structural view of the magnetic steel 12 according to some embodiments of the present application. The magnetic steel 12 may include a plurality of blocks 121, and among the plurality of blocks 121, at least some of the blocks 121 are arranged in sequence along the axial direction Z.

[0248] It should be noted that the plurality of stopper walls 101 in the first step structure 1101 are distributed in sequence along the axial direction Z. When at least some of the plurality of blocks 121 are arranged in sequence along the axial direction Z, at least one block 121 distributed along the axial direction Z may correspond to one stopper wall 101, that is, one stopper wall 101 can resist the centrifugal movement in the radial direction Y of at least one block 121 distributed in sequence along the axial direction Z. Further, it should be noted that among the plurality of stopper walls 101 distributed in sequence along the axial direction Z, generally one stopper wall 101 corresponds to one magnetic steel groove 1021. Installed in this way, at least one block 121 may be installed in one magnetic steel groove 1021, facilitating the flexible installation of the magnetic steel 12 in the magnetic steel groove 1021.

[0249] In some embodiments, the mounting frame 11 is an integrally formed structure.

[0250] In some embodiments, referring to FIGS. 24 to 28 together, FIGS. 24 and 27 respectively show partial exploded views of the motor rotor 10 according to two embodiments of the present application, FIG. 25 shows a cross-sectional view of the mounting frame 11 in FIG. 24, FIG. 28 shows a cross-sectional view of the mounting frame 11 in FIG. 27, and FIG. 26 shows a cross-sectional view of the mounting frame 11 of the motor rotor 10 according to some embodiments of the present application. The mounting frame 11 is a split joint structure. Specifically, the mounting frame 11 includes a plurality of frame bodies 113, and the plurality of frame bodies 113 are connected in sequence to form a first step structure 1101.

[0251] By joining the plurality of frame bodies 113 in sequence, the mounting frame 11 can be obtained. Installed in this way, it is easy to form the first step structure 1101 on the mounting frame 11. And the plurality of frame bodies 113 are joined in sequence, facilitating the realization of the oil passage processing process of the motor 100 and having a relatively high degree of freedom in adding oil passages.

[0252] Supplementary description here is that among the plurality of frame bodies 113, one of the frame bodies 113 includes the above-mentioned base body 113g. Or, the plurality of frame bodies 113 constitute the above-mentioned base body 113g.

[0253] In some embodiments, referring to both FIGS. 24 and 25, at least a part of the frame body 113 is the first frame body 113a, and the number of the first frame bodies 113a is plural. The plurality of first frame bodies 113a are peripherally arranged in order from the inside to the outside along the radial direction Y and the thickness in the axial direction Z gradually increases to form the first step structure 1101.

[0254] It should be noted that the first frame body 113a has an annular structure. And the inner peripheral side of each first frame body 113a has the above-mentioned stopper wall 101.

[0255] As shown in FIGS. 24 and 25, the plurality of first frame bodies 113a are arranged in order along the radial direction Y. Specifically, the plurality of first frame bodies 113a are peripherally arranged in order along the radial direction Y, and in the direction outward in the radial direction Y, the thickness of the plurality of first frame bodies 113a in the axial direction Z is set to gradually increase. As can be understood, among the plurality of first frame bodies 113a arranged in order along the radial direction Y, the first frame body 113a on the outer side in the radial direction Y is peripherally arranged on the outer periphery of the first frame body 113a on the inner side in the radial direction Y and is installed coaxially with the plurality of first frame bodies 113a, that is, the central axis L of the plurality of first frame bodies 113a is the central axis L of the mounting frame 11. And the thickness of the first frame body 113a on the outer side in the radial direction Y in the axial direction Z is larger than the thickness of the first frame body 113a on the inner side in the radial direction Y in the axial direction Z. Installed in this way, at least a part of the inner peripheral side of each first frame body 113a may all be used to resist the centrifugal movement of the magnetic steel 12 in the radial direction Y.

[0256] Furthermore, it should be further explained that the plurality of first frame bodies 113a form a first step structure 1101 by having a thickness difference in the axial direction Z. Specifically, at least a part of the inner side of the plurality of first frame bodies 113a in the radial direction Y can be combined to form the first step structure 1101.

[0257] Furthermore, it should be further explained that in the direction outward in the radial direction Y, the thickness of the first frame body 113a on the outer side of the radial direction Y in the axial direction Z is larger than the thickness of the first frame body 113a on the inner side of the radial direction Y in the axial direction Z. Correspondingly, in the direction toward one side in the axial direction Z, the distance in the radial direction Y from the central axis L of the mounting frame 11 of the stopper wall 101 is set to gradually increase. Therefore, the plurality of first frame bodies 113a of the present embodiment can form the mounting frame 11 shown in FIGS. 17 and 18.

[0258] By adopting the plurality of first frame bodies 113a that are different in thickness in the axial direction Z and are annular, and arranging the first frame bodies 113a with gradually increasing thickness in order along the radial direction Y, the mounting frame 11 can be obtained. When installed in this way, the forming operation of the mounting frame 11 is sufficiently simple and easy to realize.

[0259] In some embodiments, referring to FIG. 26 and combining with other drawings, at least a part of the frame body 113 is the second frame body 113b, and the second frame body 113b and the first frame body 113a are installed in order along the axial direction Z to form the first frame body 113a and the first step structure 1101.

[0260] It should be explained that the second frame body 113b has an annular structure, and the inner peripheral side of the second frame body 113b has the stopper wall 101.

[0261] In some possible designs, as shown in FIG. 26, the second frame body 113b may be installed on one side in the axial direction Z of any one of the first frame bodies 113a, or the second frame bodies 113b may be installed on both opposite sides in the axial direction Z of any one of the first frame bodies 113a. Here, the inner diameter of the second frame body 113b may be larger than the inner diameter of each first frame body 113a, may be smaller than the inner diameter of each first frame body 113a, or may be larger than the inner diameter of some of the first frame bodies 113a and smaller than the inner diameter of other parts of the first frame bodies 113a.

[0262] Here, when the inner diameter of the second frame body 113b is larger than the inner diameter of the first frame body 113a, the distance in the radial direction Y with respect to the central axis L on the inner peripheral side of the second frame body 113b is also larger than the distance in the radial direction Y with respect to the central axis L on the inner peripheral side of the first frame body 113a, and other sizes can be interpreted similarly and will not be further described here.

[0263] As an example, as shown in FIG. 26, the second frame body 113b is installed on one side in the axial direction Z of the first frame body 113a with the largest thickness in the axial direction Z, and the inner diameter of the second frame body 113b is larger than the inner diameter of each first frame body 113a, whereby the first frame body 113a and the second frame body 113b can also constitute the mounting frame 11 shown in FIGS. 17 and 8. As an example, when the inner diameter of the second frame body 113b is smaller than the inner diameter of at least one of the first frame bodies 113a, the mounting frame 11 shown in FIG. 19 can be constituted.

[0264] By adopting a first frame body 113a distributed in sequence along a plurality of radial directions Y and a second frame body 113b distributed along the axial direction Z with the first frame body 113a, the plurality of frame bodies 113 are arranged in combination along the axial direction Z and the radial direction Y, thereby forming a first step structure 1101, which facilitates obtaining various different types of first step structures 1101 and has relatively high flexibility.

[0265] In some embodiments, referring to both FIGS. 27 and 28 and in conjunction with other drawings, FIG. 27 shows an exploded view of a mounting frame 11 of a motor rotor 10 according to some embodiments of the present application, and FIG. 28 shows a cross-sectional view after the mounting frame 11 shown in FIG. 27 is assembled. At least a part of the frame body 113 is a third frame body 113c, the third frame body 113c is annular, and the number of the third frame bodies 113c is plural. The plurality of third frame bodies 113c are installed in sequence along the axial direction Z, and the inner diameters of at least two adjacent third frame bodies 113c are different to form a first step structure 1101.

[0266] It should be noted that a stopper wall 101 may be installed on the inner peripheral side of each third frame body 113c.

[0267] Furthermore, it should be noted that the inner diameters of at least two adjacent third frame bodies 113c are different and can form a first step structure 1101. Specifically, at least a part of the inner side in the radial direction Y of the plurality of third frame bodies 113c can be combined to form the above-mentioned first step structure 1101.

[0268] Among the plurality of third frame bodies 113c, the inner diameters of at least some of the third frame bodies 113c are different, and the inner diameters of all the third frame bodies 113c may all be different. The inner diameters of some of the third frame bodies 113c may be different, that is, there may be at least two third frame bodies 113c with the same inner diameter. When a plurality of third frame bodies 113c with the same inner diameter are not installed adjacent to each other, the plurality of third frame bodies 113c with the same inner diameter can still participate in the formation of the first step structure 1101.

[0269] In some possible designs, as shown in FIGS. 27 and 28, in the direction toward one side in the axial direction Z, the inner diameters of the plurality of third frame bodies 113c gradually increase, and accordingly, the radial distance in the Y direction of the mounting frame 11 of the plurality of stoppers 101 with respect to the central axis L also increases gradually. In some possible designs, among three adjacent third frame bodies 113c, the inner diameter of the third frame body 113c is smaller than that of one of the adjacent third frame bodies 113c in the axial direction Z and smaller than that of another adjacent third frame body 113c in the axial direction Z, and thus the mounting frame 11 shown in FIG. 20 can be configured.

[0270] By adopting the above technical solution, at least some of the plurality of frame bodies 113 can be arranged in sequence along the axial direction Z to form the first step structure 1101. That is, by adopting a plurality of third frame bodies 113c with different inner diameters of at least some of them and arranging the third frame bodies 113c in sequence along the axial direction Z, the mounting frame 11 can be obtained. Installed in this way, the forming operation of the mounting frame 11 is very simple and easy to achieve. And by adjusting the positions of the plurality of third frame bodies 113c along the axial direction Z, different types of the first step structure 1101 can be obtained, and thus the formation of the mounting frame 11 is very flexible and diverse.

[0271] In some embodiments, referring to both FIGS. 27 and 28 and in combination with other drawings, at least a part of the frame body 113 is the fourth frame body 113d, and the fourth frame body 113d includes a receiving member 1131d and an annular member 1132d provided on the receiving member 1131d. The third frame body 113c and the receiving member 1131d are sequentially distributed along the axial direction Z, and the annular member 1132d is peripherally provided outside the third frame bodies 113c in the radial direction Y.

[0272] As can be understood, the receiving member 1131d is installed on one side of the entire axial direction Z formed by a plurality of third frame bodies 113c, so that the receiving member 1131d and the plurality of third frame bodies 113c are sequentially arranged along the axial direction Z. And the annular member 1132d is installed on the side of the receiving member 1131d having the third frame body 113c, and the annular member 1132d is peripherally provided on the outer periphery of the plurality of third frame bodies 113c, and each third frame body 113c and the annular member 1132d are sequentially arranged along the radial direction Y.

[0273] By adopting the above technical solution, the third frame body 113c is installed on one side along the axial direction Z of the receiving member 1131d, and the annular member 1132d is peripherally provided on the outer periphery of the plurality of third frame bodies 113c. In this way, the plurality of third frame bodies 113c can realize the stopper in the axial direction Z under the action of the receiving member 1131d, and can also be constrained along the radial direction Y under the action of the annular member 1132d, thereby improving the overall stability of the mounting frame 11 and contributing to improving the mounting reliability of the mounting frame 11 to the magnetic steel 12.

[0274] Supplementary to be explained, when the axial dimension Z of the annular member 1132d is larger than the sum of the axial dimensions Z of the plurality of third frame bodies 113c, the annular member 1132d can also participate in the formation of the first step structure 1101. As shown in FIGS. 27 and 28, specifically, the mounting frame 11 shown in FIGS. 17 and 18 can be obtained.

[0275] In some embodiments, as shown in FIGS. 27 and 28 and in connection with other drawings, the fourth frame body 113d may further include a first intermediate member 1133d, and a plurality of third frame bodies 113c are peripherally provided on the outer periphery of the first intermediate member 1133d and installed coaxially with the first intermediate member 1133d. When installed in this way, the position in the radial direction Y between the third frame body 113c and the first intermediate member 1133d can also form the magnetic steel groove 1021.

[0276] In some embodiments, as shown in FIGS. 24 and 25, at least a part of the frame body 113 may be a sixth frame body 113f. The sixth frame body 113f may include a bottom plate 1131f and a second intermediate member 1132f provided on the bottom plate 1131f. A plurality of first frame bodies 113a are peripherally provided on the outer periphery of the second intermediate member 1132f and installed coaxially with the second intermediate member 1132f. And a plurality of first frame bodies 113a are all installed on the bottom plate 1131f. In this way, the first frame body 113a and the second intermediate member 1132f form the magnetic steel groove 1021.

[0277] Here, the receiving member 1131d may be the above-mentioned base body 113g, and the bottom plate 1131f may also be the above-mentioned base body 113g.

[0278] In some embodiments, the frame body 113 is of an integral structure or a split connection structure.

[0279] As can be understood, the above-mentioned first frame body 113a, second frame body 113b, third frame body 113c, fourth frame body 113d and sixth frame body 113f may all be of a single integral structure or a split connection structure.

[0280] As an example, when the fourth frame body 113d has an integral structure, the annular member 1132d and the receiving member 1131d of the fourth frame body 113d form an integral connection structure with the first intermediate member 1133d. When the fourth frame body 113d has a split connection structure, at least two of the annular member 1132d, the receiving member 1131d, and the first intermediate member 1133d are split-connected.

[0281] By installing the frame body 113 in an integral structure, the mounting frame 11 can be constituted by a plurality of integrally installed frame bodies 113. By installing the frame body 113 in a split connection structure, the frame body 113 can be joined by a plurality of parts, and then a plurality of frame bodies 113 are joined to form the mounting frame 11. Thus, it is advantageous for improving the joining flexibility of the mounting frame 11 and facilitating the constitution of various different types of first step structures 1101. Here, when the frame body 113 has a split connection structure, the plurality of parts of the frame body 113 can be joined along at least one direction among directions such as the radial direction Y, the axial direction Z, and the circumferential direction X to form the frame body 113.

[0282] In some embodiments, the plurality of frame bodies 113 can be joined along at least one direction among directions such as the axial direction Z, the radial direction Y, and the circumferential direction X, thereby freely and flexibly joining to form the mounting frame 11. And it further facilitates the realization of the oil passage processing process of the motor 100, and the degree of freedom in adding the oil passage is relatively high.

[0283] In some embodiments, referring to both FIGS. 29 and 30 and in combination with other drawings, FIG. 29 shows an exploded view of the mounting frame 11 of the motor rotor 10 according to some embodiments of the present application, and FIG. 30 is a cross-sectional view after the mounting frame 11 shown in FIG. 29 is assembled. The mounting frame 11 includes a plurality of fifth frame bodies 113e, and the plurality of fifth frame bodies 113e are sequentially distributed along the axial direction Z. The magnetic steel grooves 1021 are provided in the fifth frame body 113e, and the stopper walls 101 of the magnetic steel grooves 1021 of at least some adjacent fifth frame bodies 113e are arranged offset along the radial direction Y.

[0284] In some possible designs, among the plurality of fifth frame bodies 113e, the stopper walls 101 of the magnetic steel grooves 1021 of some adjacent two fifth frame bodies 113e are arranged offset along the radial direction Y, and the stopper walls 101 of the magnetic steel grooves 1021 of another part of adjacent fifth frame bodies 113e are located at the same position in the radial direction Y. In some possible designs, among the plurality of fifth frame bodies 113e, the stopper walls 101 of the magnetic steel grooves 1021 of any two adjacent fifth frame bodies 113e are arranged offset along the radial direction Y.

[0285] As can be understood, the groove wall of the magnetic steel groove 1021 facing the central axis L of the mounting frame 11 is the stopper wall 101. The stopper walls 101 of the magnetic steel grooves 1021 of two adjacent fifth frame bodies 113e are arranged offset along the radial direction Y, whereby the stopper walls 101 of the magnetic steel grooves 1021 of two adjacent fifth frame bodies 113e are arranged at intervals along the radial direction Y.

[0286] In some possible designs, the magnetic steel grooves 1021 of two adjacent fifth frame bodies 113e may communicate axially opposite along the axial direction Z or may not communicate along the axial direction Z.

[0287] When installed in this way, the mounting frame 11 can disperse the stress of the mounting frame 11 along the radial direction Y by forming a plurality of stopper walls 101 distributed at intervals along the radial direction Y, and further improve the ability of the mounting frame 11 to withstand the centrifugal movement of the magnetic steel 12 in the radial direction Y. Then, by opening a magnetic steel groove 1021 on each fifth mounting frame 11 and subsequently joining a plurality of fifth mounting frames 11 along the axial direction Z, a mounting frame 11 capable of dispersing stress along the radial direction Y can be obtained, which is very convenient and easy to implement.

[0288] In some embodiments, referring to both FIGS. 10 to 13 and combining with other drawings, in the direction outward in the radial direction Y, the circumferential X size of each magnetic steel groove 1021 is set to gradually increase.

[0289] As can be understood, the circumferential X size outside the magnetic steel groove 1021 in the radial direction Y is larger than the circumferential X size inside the magnetic steel groove 1021 in the radial direction Y.

[0290] When installed in this way, from the perspective in the axial direction Z, each magnetic steel groove 1021 may exhibit a shape such as a substantially fan shape or a trapezoid. In this way, it is advantageous for the magnetic steel groove 1021 to be laid on the mounting frame 11 to the maximum limit, and it contributes to increasing the occupied area on one side of the mounting frame 11 of the magnetic steel 12 in the axial direction Z. That is, a relatively large area of the surface of the magnetic steel 12 in the axial direction Z can be ensured, which is advantageous for the magnetic steel 12 to move the mounting frame 11 under the action of the stator 20 and rotate together, thereby improving the output efficiency of outputting power through the rotating shaft 30.

[0291] In some embodiments, the magnetic steel 12 has a split connection structure. Referring to FIGS. 6 to 9, FIGS. 16, FIGS. 22 and FIGS. 23 together and combining with other drawings, the magnetic steel 12 includes a plurality of blocks 121. As can be understood, the magnetic steel 12 may be divided into a plurality of parts.

[0292] In some embodiments, as shown in FIGS. 6 to 9, FIGS. 16 and 22, and in conjunction with other drawings, a plurality of blocks 121 are sequentially distributed along the radial direction Y.

[0293] In some embodiments, as shown in FIG. 23, a plurality of blocks 121 are sequentially distributed along the axial direction Z.

[0294] In some embodiments, a plurality of blocks 121 are sequentially distributed along the circumferential direction X.

[0295] When installed in this way, the plurality of blocks 121 of the magnetic steel 12 may be sequentially distributed along the axial direction Z, may be sequentially distributed along the circumferential direction X, and may further be sequentially distributed along the radial direction Y. Thus, they may be joined in combination along at least two of the axial direction Z, circumferential direction X, and radial direction Y. In this way, the free combination method of the magnetic steel 12 is sufficiently numerous and flexible, which is advantageous for the magnetic steel 12 to be installed conformably within the plurality of mounting regions 102 of the mounting frame 11, thereby facilitating the realization of the resistance effect of the stopper wall 101 of the mounting frame 11 against the centrifugal movement in the radial direction Y with respect to the mounting region 102.

[0296] Here, in one mounting region 102, there may be one block 121, or there may be a plurality of blocks 121. The plurality of blocks 121 may be joined along at least one of the circumferential direction X, axial direction Z, and radial direction Y. Of course, one block 121 may be installed in a plurality of mounting regions 102 simultaneously, and specifically, it may be installed according to the actual usage situation.

[0297] In some embodiments, among the plurality of blocks 121, the blocks 121 adjacent along the radial direction Y are arranged or adhered with a gap therebetween.

[0298] In some embodiments, the blocks 121 adjacent along the circumferential direction X are arranged or adhered with a gap therebetween.

[0299] It should be noted that the magnetic steel 12 may include realizing adhesion by adopting methods such as being adhesively fixed, pasted with an adhesive tape, applying an adhesive, and covering with a film. Here, the adhesive in adhesive application may be a solid adhesive, a liquid adhesive, or the like.

[0300] By adopting the above technical solution, magnetic flux lines are difficult to pass through the blocks 121 arranged or adhered with a certain interval between two adjacent ones. The blocks 121 adjacent along the radial direction Y can form a vortex alone, and the blocks 121 adjacent along the circumferential direction X can also form a vortex alone. That is, the vortex formed during the operation of the motor 100 can be reduced, which contributes to reducing the vortex loss.

[0301] In some embodiments, the mounting frame 11 is a permeable material member.

[0302] As can be understood, the mounting frame 11 has a permeable function.

[0303] Specifically, the mounting frame 11 is made of a permeable material. The permeable material may include silicon steel sheets, manganese zinc ferrites, nickel zinc ferrites, iron cobalt-based alloys, soft ferrites, amorphous soft magnetic alloys, ultrafine crystal soft magnetic alloys, etc. The mounting frame 11 may also be made of a soft magnetic material, for example, it may be made by winding iron cores or powder metallurgy, etc. For example, a silicon steel sheet may be adopted for winding to form a winding iron core, which is easy to manufacture by an additional method and can also better reduce the vortex loss. The soft magnetic material refers to a material that is easy to magnetize and demagnetize. For example, the soft magnetic material may use pure iron, low-carbon steel, iron silicon-based alloys, iron aluminum-based alloys, iron silicon aluminum-based alloys, nickel iron-based alloys, iron cobalt-based alloys, soft ferrites, amorphous soft magnetic alloys, ultrafine crystal soft magnetic alloys, etc.

[0304] By adopting the above technical solution, the mounting frame 11 can form a permeable magnetic plate. When installed in this way, the magnetic flux lines can penetrate through the whole formed by the magnetic steel 12 and the mounting frame 11 along the axial direction Z, and by expanding the range of the magnetic flux lines, it contributes to improving the structural stability of the motor rotor 10 and can meet the use requirements of high rotation speed.

[0305] In some embodiments, the mounting frame 11 is a non-magnetic permeable material member.

[0306] When installed in this way, the mounting frame 11 cannot be magnetically permeable, that is, it is a holding frame.

[0307] In some embodiments, referring to FIGS. 10, 11, 24, 31 and 32 together and in conjunction with other drawings, FIGS. 31 and 32 respectively show exploded views of the motor rotor 10 according to two embodiments of the present application. A plurality of magnetic steels 12 are installed, and the plurality of magnetic steels 12 are sequentially distributed on the mounting frame 11 along the circumferential direction X. The mounting frame 11 further includes a plurality of stopper structures 114, and the plurality of stopper structures 114 are sequentially distributed along the circumferential direction X, and each magnetic steel 12 is stoppered between two adjacent stopper structures 114 along the circumferential direction X.

[0308] As can be understood, each stopper structure 114 and each magnetic steel 12 are alternately distributed along the circumferential direction X. That is, the distribution directions of the plurality of stopper structures 114 and the plurality of magnetic steels 12 are stopper structure 114, magnetic steel 12, stopper structure 114, magnetic steel 12... and so on by analogy.

[0309] Here, it should be explained that a plurality of adjacent stopper structures 114 along the circumferential direction X divide the mounting frame 11 into a plurality of regions sequentially distributed along the circumferential direction X, and a plurality of mounting regions 102 sequentially distributed along the radial direction Y are installed in each region.

[0310] When a magnetic steel groove 1021 is provided in the attachment region 102, the opposite sides of two adjacent stopper structures 114 along the circumferential direction X are respectively the opposite both side walls of the corresponding magnetic steel groove 1021 in the circumferential direction X. Based on this, when the first boss 112 is installed on the side wall in the circumferential direction X of the communication location of two adjacent magnetic steel grooves 1021, this first boss 112 is installed on the stopper structure 114.

[0311] Here, it should be further explained that, as shown in FIGS. 17, 24, 31 and 32, and in conjunction with other drawings, a plurality of magnetic steel grooves 1021 arranged in the radial direction Y form a first step structure 1101 in the axial direction Z, and when the step of each step of the first step structure 1101 is annular, by requiring the installation of a corresponding step structure for the stopper structure 114, the stopper structure 114 conforms to the step structure and facilitates the attachment of the stopper structure 114 in the first step structure 1101.

[0312] Here, in the step structure constituted by the stopper structure 114, the wall surface for facing the stopper wall 101 of the first step structure 1101 of the step structure may be parallel to the stopper wall 101, and the wall surface for facing along the axial direction Z to the step surface that is not the stopper wall 101 of the first step structure 1101 of the step structure may be installed to be parallel to the corresponding step surface that is not the stopper wall 101 of the first step structure 1101. In this way, the stopper structure 114 conforms to the first step structure 1101 and facilitates the stable assembly of the stopper structure 114.

[0313] Installed in this way, the stopper structure 114 separates two adjacent magnetic steels 12, and thus, the stopper structure 114 can separate magnetic steels 12 of different magnetic poles, facilitating the magnetic steel 12 to drive the entire motor rotor 10 to rotate under the action of the stator 20, and outputting power via the rotating shaft 30.

[0314] In some embodiments, the magnetic steel 12 is fixedly connected to the attachment frame 11.

[0315] When installed in this way, the relative position between the magnetic steel 12 and the mounting frame 11 is fixed. In this way, the stopper wall 101 resists the centrifugal movement of the magnetic steel 12 in the radial direction Y, and the fixed connection relationship between the magnetic steel 12 and the mounting frame 11 can resist the centrifugal movement of the magnetic steel 12 in the radial direction Y on the mounting frame 11, contributing to improving the mounting reliability between the mounting frame 11 and the magnetic steel 12 and facilitating the realization of the effect of high rotational speed.

[0316] In some embodiments, the magnetic steel 12 may be press-fitted with the mounting frame 11.

[0317] As can be understood, when the magnetic steel groove 1021 is provided in the mounting region 102, at least a part of the magnetic steel 12 is press-fitted with the magnetic steel groove 1021.

[0318] In some embodiments, the magnetic steel 12 may be injection-connected with the mounting frame 11.

[0319] In some embodiments, the magnetic steel 12 may be adhesively fixed to the mounting frame 11.

[0320] Here, the magnetic steel 12 being adhesively fixed to the mounting frame 11 may include adopting methods such as pasting with an adhesive tape, applying an adhesive, and covering with a film to achieve adhesion. Here, the adhesive in the adhesive application may be a solid adhesive, a liquid adhesive, or the like.

[0321] By adopting the above technical solutions, the magnetic steel 12 and the mounting frame 11 can achieve fixation by adopting at least one of the methods of press-fitting, injection connection, and adhesive fixation, and all can have relatively high mounting reliability between the mounting frame 11 and the magnetic steel 12.

[0322] As a supplementary explanation, when at least a part of the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z, the fixation between the magnetic steel 12 and the mounting frame 11 can be realized by at least one of injection connection and adhesive fixation. When at least a part of the magnetic steel 12 is installed in the magnetic steel groove 1021, the part incorporated in the magnetic steel groove 1021 and the magnetic steel groove 1021 can adopt at least one of interference fit, injection connection, and adhesive fixation to realize the fixation.

[0323] Furthermore, as a supplementary explanation, when at least a part of the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z and another part is installed in the magnetic steel groove 1021, a part of the magnetic steel 12 can be fixed to the surface of the mounting frame 11 by at least one of injection connection and adhesive fixation, and the part provided in the magnetic steel groove 1021 of the magnetic steel 12 can realize the fixation by at least one of interference fit, injection connection, and adhesive fixation.

[0324] In some embodiments, referring to both FIGS. 31 and 32 and in conjunction with other drawings, the motor rotor 10 further includes a protective member 13, the magnetic steel 12 is exposed on one side or both opposite sides along the axial direction Z of the mounting frame 11, and the protective member 13 is provided on the side where the magnetic steel 12 of the mounting frame 11 is exposed.

[0325] In some possible designs, one surface of the mounting frame 11 in the axial direction Z is used for installing the magnetic steel 12, or the mounting frame 11 has a magnetic steel groove 1021, and the magnetic steel groove 1021 is installed on one side of the mounting frame 11 in the axial direction Z and is a concave groove. Based on this, the magnetic steel 12 is exposed on one side along the axial direction Z of the mounting frame 11, and the protective member 13 is installed on one side along the axial direction Z of the mounting frame 11 and covers the magnetic steel 12 exposed along the axial direction Z.

[0326] In some possible designs, the surfaces on both opposite sides that are axially attached in the Z direction are both used for installing the magnetic steel 12, or the magnetic steel groove 1021 is installed as a through groove penetrating the mounting frame 11 along the axial direction Z, or the magnetic steel groove 1021 is a concave groove, and both opposite sides of the mounting frame 11 in the axial direction Z have the magnetic steel groove 1021. Based on this, the magnetic steel 12 is exposed on both opposite sides of the mounting frame 11 in the axial direction Z, and the protective members 13 are installed on both opposite sides of the mounting frame 11 in the axial direction Z.

[0327] The protective member 13 is installed on the side where the magnetic steel 12 is exposed in the axial direction Z of the mounting frame 11. Thus, the protective member 13 can realize the protection of the magnetic steel 12 by sealing the magnetic steel 12 together with the mounting frame 11.

[0328] In some embodiments, the protective member 13 is a magnetic permeable material member.

[0329] As can be understood, the protective member 13 has a magnetic permeable function.

[0330] Specifically, the protective member 13 is made of a magnetic permeable material. The magnetic permeable material may include silicon steel sheets, manganese zinc ferrites, nickel zinc ferrites, iron cobalt-based alloys, soft ferrites, amorphous soft magnetic alloys, ultra-fine crystalline soft magnetic alloys, etc. The protective member 13 may also be made of a soft magnetic material, for example, it may be made by winding iron cores or powder metallurgy. For example, a silicon steel sheet may be adopted and wound to form a winding iron core, which is easy to manufacture by an additional method and can better reduce eddy current losses. The soft magnetic material refers to a material that is easy to magnetize and demagnetize. For example, the soft magnetic material may use pure iron, low-carbon steel, iron silicon-based alloys, iron aluminum-based alloys, iron silicon aluminum-based alloys, nickel iron-based alloys, iron cobalt-based alloys, soft ferrites, amorphous soft magnetic alloys, ultra-fine crystalline soft magnetic alloys, etc.

[0331] By adopting the above technical solution, the protective member 13 can form a magnetic permeable plate. When installed in this way, on the one hand, by passing the main magnetic field synchronized with the motor rotor 10, torque output can be realized. On the other hand, the harmonic magnetic field of the stator 20 is shielded by the magnetic permeability of the protective member 13 to reduce eddy current loss, and further reduce the eddy current loss of the motor 100 using this motor rotor 10, and improve the output efficiency of the motor 100.

[0332] In some embodiments, a positioning groove is provided in the protective member 13 (not shown), and at least a part of the magnetic steel 12 is provided in the positioning groove.

[0333] As can be understood, the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z, and at least a part of the magnetic steel 12 in the axial direction Z is incorporated into the positioning groove of the protective member 13. Or, a part of the magnetic steel 12 in the axial direction Z is incorporated into the magnetic steel groove 1021, and another part is incorporated into the positioning groove.

[0334] When installed in this way, the groove wall along the radial direction Y of the positioning groove towards the central axis L of the mounting frame 11 can also resist the centrifugal movement of the magnetic steel 12 in the radial direction Y. By improving the resistance ability of the magnetic steel 12 of the motor rotor 10 against the centrifugal movement in the radial direction Y in this way, the structural stability and reliability of the motor rotor 10 can be improved, which is advantageous for realizing the effect of using the motor rotor 10 at a high rotational speed.

[0335] In some embodiments, referring to FIG. 31 and combining with other drawings, a plurality of mounting frames 11 are installed, and the plurality of mounting frames 11 are sequentially distributed along the axial direction Z, and the protective member 13 is provided between two adjacent mounting frames 11.

[0336] As can be understood, among two adjacent mounting frames 11 along the axial direction Z, the magnetic steel 12 in any one of the mounting frames 11 is exposed at least on the side facing the other mounting frame 11, that is, the magnetic steel 12 of the two mounting frames 11 is exposed at least on the opposite sides of the mounting frame 11.

[0337] When installed in this way, by installing the protection member 13 between two adjacent mounting frames 11, one protection member 13 can achieve the protection effect on the magnetic steel 12 in the two mounting frames 11, and in this way, the use of the protection member 13 can be reduced, which is advantageous for realizing the miniaturized design of the motor rotor 10.

[0338] In some embodiments, referring to FIG. 32 and in conjunction with other drawings, a plurality of protection members 13 are installed, and the plurality of protection members 13 are distributed in sequence along the axial direction Z.

[0339] In some embodiments, referring to FIG. 32 and in conjunction with other drawings, a plurality of mounting frames 11 are installed between two adjacent protection members 13, and the plurality of mounting frames 11 located between the two protection members 13 are distributed in sequence along the axial direction Z.

[0340] When installed in this way, the magnetic steel 12 in the two mounting frames 11 can respectively act with the stators 20 on both opposite sides, facilitating the two stators 20 to drive a motor rotor 10 to rotate and improving the output efficiency.

[0341] In some embodiments, one mounting frame 11 is provided between two adjacent protection members 13, and the magnetic steel 12 is exposed on both sides along the axial direction Z of the mounting frame 11.

[0342] When installed in this way, the magnetic steel 12 in the mounting frame 11 can act on the stators 20 on both opposite sides respectively, facilitating the two stators 20 to drive and rotate a single motor rotor 10, and improving the output efficiency.

[0343] In some embodiments, when a plurality of protective plates and mounting frames 11 are installed, the above two schemes may be installed simultaneously. That is, some of the protective plates and the mounting frame 11 meet the form shown in FIG. 32, and for another part of the protective plates and the mounting frame 11, one mounting frame 11 is provided between two adjacent protective members 13, and the magnetic steel 12 is exposed on both sides along the axial direction Z of the mounting frame 11.

[0344] Based on the above concept, referring to both FIGS. 2 to 5 and combining with other drawings, the embodiment of the present application further provides a motor 100, and the motor 100 includes a motor rotor 10. Here, the motor rotor 10 in this embodiment is the same as the motor rotor 10 in the previous embodiment. Specifically, refer to the related description of the motor rotor 10 in the previous embodiment, and it will not be described in detail here. Here, for other components of the motor 100, such as the stator 20 and the rotating shaft 30, reference may be made to the above related parts, and it will not be repeatedly described in detail here.

[0345] Here, the motor 100 may be an axial motor. When the motor rotor 10 mentioned in each of the above embodiments can be applied to a radial motor, this motor 100 may also be a radial motor. For example, when each mounting area 102 of the mounting frame 11 has a magnetic steel groove 1021, the outermost magnetic steel groove 1021 along the radial direction Y can penetrate the outer edge of the mounting frame 11 along the radial direction Y, whereby the motor rotor 10 can be applied to a radial motor, that is, this motor 100 may also be a radial motor.

[0346] According to the embodiment of the present application, the motor 100 adopts the motor rotor 10 according to each of the above embodiments, so that the mounting frame 11 can withstand relatively large stress. In this way, the mounting frame 11 and the magnetic steel 12 have relatively high bonding reliability, that is, the motor rotor 10 has relatively high structural reliability, and the problem that the magnetic steel 12 pops out externally when the motor rotor 10 rotates can be improved. Therefore, the motor 100 can meet the use requirements of high rotational speed and has a relatively high output efficiency.

[0347] Based on the above concept, referring to FIG. 1 and combining with other drawings. The embodiment of the present application further provides a power train 1000, and the power train 1000 includes a motor 100. The motor 100 in this embodiment is the same as the motor 100 in the previous embodiment. Specifically, refer to the related description of the motor 100 in the previous embodiment and will not be described in detail here. Here, there may be other components for the power train 1000, such as a transmission, a controller 400, a battery 300, etc. Refer to the description of the related parts above and will not be repeated and described in detail here.

[0348] According to the embodiment of the present application, the power train 1000 adopts the motor 100 according to each of the above embodiments, so that the motor 100 can meet the use requirements of high rotational speed, has a relatively high output efficiency, and further the power output efficiency of the power train 1000 is relatively high.

[0349] Based on the above concept, referring to FIG. 1 and combining with other drawings. The embodiment of the present application further provides an electric device, and the electric device includes a motor 100 or a power train 1000. Here, the motor 100 and the power train 1000 in this embodiment are the same as the motor 100 and the power train 1000 in the previous embodiment. Specifically, refer to the related description of the motor 100 and the power train 1000 in the previous embodiment and will not be described in detail here. Here, the specific solution of the power device may also refer to the above related parts and will not be repeated and described in detail here.

[0350] According to the embodiments of the present application, the electric equipment adopts the motor 100 or the power train 1000 according to the above embodiments, so that the electric equipment can output power with relatively high efficiency and better meet the usage requirements.

[0351] As one embodiment of the present application, as shown in FIGS. 6 and 7, the motor rotor 10 includes a mounting frame 11 and a magnetic steel 12. The surfaces on one side or both opposite sides of the mounting frame 11 in the axial direction Z are used for installing the magnetic steel 12. On the surface of one side of the mounting frame 11 in the axial direction Z, the mounting frame 11 has a plurality of mounting regions 102 distributed in sequence along the radial direction Y. A partition member 111 is provided between two adjacent mounting regions 102. The outermost mounting region 102 along the radial direction Y has a fence member 115. The magnetic steel 12 includes a plurality of blocks 121 distributed in sequence along the radial direction Y. The plurality of blocks 121 are respectively provided on the mounting regions 102 distributed in sequence along the radial direction Y, and all the plurality of blocks 121 are installed on the surface of the mounting frame 11 in the axial direction Z. And the partition member 111 is used to resist the centrifugal movement of the block 121 in the mounting region 102 inside the radial direction Y of it, and the fence member 115 is used to resist the block 121 in the outermost mounting region 102 in the radial direction Y. Here, the wall surface of the partition member 111 facing the central axis L of the mounting frame 11 along the radial direction Y and the wall surface of the fence member 115 facing the central axis L of the mounting frame 11 along the radial direction Y are both stopper walls 101.

[0352] As one example in the present application, as shown in FIG. 10, the motor rotor 10 includes a mounting frame 11 and a magnetic steel 12, and the mounting frame 11 is provided with mounting regions 102 that are sequentially distributed along a plurality of radial directions Y. Each mounting region 102 has a magnetic steel groove 1021, and the groove wall of each magnetic steel groove 1021 along the radial direction Y toward the central axis L of the mounting frame 11 is a stopper wall 101. Two adjacent magnetic steel grooves 1021 are partitioned by a partitioning member 111 and are distributed at intervals. The wall surface of the partitioning member 111 along the radial direction Y toward the central axis L of the mounting frame 11 is the stopper wall 101 of the magnetic steel groove 1021 inside it in the radial direction Y.

[0353] As one example in the present application, as shown in FIGS. 11 to 14, the motor rotor 10 includes a mounting frame 11 and a magnetic steel 12, and the mounting frame 11 is provided with mounting regions 102 that are sequentially distributed along a plurality of radial directions Y. Each mounting region 102 has a magnetic steel groove 1021, and the groove wall of each magnetic steel groove 1021 along the axial direction Z toward the central axis L of the mounting frame 11 is a stopper wall 101. Two adjacent magnetic steel grooves 1021 communicate with each other along the radial direction Y, and first bosses 112 are provided on both opposite side walls in the circumferential direction X at the communication position. The wall surface of the first boss 112 along the radial direction Y toward the central axis L of the mounting frame 11 is the stopper wall 101 of the magnetic steel groove 1021 inside it in the radial direction Y.

[0354] As one example in this application, as shown in FIGS. 17 and 18, the motor rotor 10 includes a mounting frame 11 and magnetic steel 12, and the mounting frame 11 is provided with mounting regions 102 that are sequentially distributed along a plurality of radial directions Y. Each mounting region 102 has a magnetic steel groove 1021, and the groove wall of each magnetic steel groove 1021 facing the central axis L of the mounting frame 11 along the radial direction Y is a stopper wall 101. The plurality of magnetic steel grooves 1021 arranged along the radial direction Y form a first stepped structure 1101 in the axial direction Z, and the wall surface of the first stepped structure 1101 facing the central axis L of the mounting frame 11 along the radial direction Y is a stopper wall 101, and the plurality of stopper walls 101 in the first stepped structure 1101 are sequentially distributed along the axial direction Z. In the direction towards one side in the axial direction Z, the distance in the radial direction Y of the plurality of stopper walls 101 from the central axis L of the mounting frame 11 is set to gradually increase. Here, the first stepped structure 1101 is an annular step.

[0355] The above is only a relatively preferred embodiment of this application, and is not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application should all be included within the protection scope of this application.

Description of Reference Numerals

[0356] 1000 - Power train, 100 - Motor, 200 - Transmission, 300 - Battery, 400 - Controller, 10 - Motor rotor, 20 - Stator, 30 - Rotating shaft, 101 - Stopper wall, 101a - First stopper wall, 101b - Second stopper wall, 101c - Third stopper wall, 101d - Fifth stopper wall, 101e - Sixth stopper wall, 101f - Seventh stopper wall, 102 - Mounting area, 1021 - Magnetic steel groove, 1021a - First magnetic steel groove, 1021b - Second magnetic steel groove, 103 - Opening, 104 - Fourth stopper wall, 105 - Eighth stopper wall, 11 - Mounting frame, 1101 - First step structure, 111 - Partition member, 112 - First boss, 113 - Frame body, 113a - First frame body, 113b - Second frame body, 113c - Third frame body, 113d - Fourth frame body, 1131d - Receiving member, 1132d - Annular member, 1133d - First intermediate member, 113e - Fifth frame body, 113f - Sixth frame body, 1131f - Bottom plate, 1132f - Second intermediate member, 113g - Substrate, 114 - Stopper structure, 115 - Fence member, 12 - Magnetic steel, 1201 - Second step structure, 1202 - Third step structure, 121 - Block, 121a - First block, 121b - Second block, 1211 - Second boss, 1212 - Third boss, 13 - Protective member, L - Central axis, Z - Axis direction, Y - Radial direction, X - Circumferential direction, H1 - Circumferential size outside the radial direction of the second magnetic steel groove, H2 - Circumferential size inside the radial direction of the second magnetic steel groove, H3 - Circumferential size outside the radial direction of the first magnetic steel groove, H4 - Radial distance of the first stopper wall from the central axis, H5 - Radial distance of the second stopper wall from the central axis, H6 - Radial distance of the third stopper wall from the central axis, H7 - Radial distance of the fifth stopper wall from the central axis, H8 - Radial distance of the sixth stopper wall from the central axis, H9 - Radial distance of the seventh stopper wall from the central axis, H10 - Circumferential size outside the radial direction of the first block, H11 - Circumferential size inside the radial direction of the second block.

Claims

1. A motor rotor (10), comprising: a mounting frame (11); and a magnetic steel (12) attached to the mounting frame (11), wherein a stopper wall (101) is provided on the mounting frame (11), and the stopper wall (101) is used to resist the radial centrifugal movement of the magnetic steel (12). The motor rotor (10).

2. The mounting frame (11) is provided with a plurality of mounting regions (102) distributed along the radial direction. The magnetic steel (12) is attached to the plurality of mounting regions (102), and the stopper wall (101) is provided in at least one of the mounting regions (102). The motor rotor (10) according to claim 1.

3. A partition member (111) is provided between two adjacent mounting regions (102) along the radial direction. The wall surface of the partition member (111) facing the central axis of the mounting frame (11) is the stopper wall (101). The motor rotor (10) according to claim 2.

4. Magnetic steel grooves (1021) are provided in a plurality of adjacent mounting regions (102) along the radial direction. The stopper wall (101) is provided in the magnetic steel grooves (1021). A partition member (111) is provided between two adjacent magnetic steel grooves (1021). The wall surface of the partition member (111) facing the central axis of the mounting frame (11) is the stopper wall (101) of the magnetic steel groove (1021) inside the partition member (111) in the radial direction. The motor rotor (10) according to claim 3.

5. The stopper wall (101) is provided in each of the mounting regions (102), and the stopper walls (101) of the plurality of mounting regions (101) are distributed at intervals along the radial direction. The motor rotor (10) according to any one of claims 2 to 4.

6. Magnetic steel grooves (1021) are provided in at least one of the mounting regions (102), and the stopper wall (101) is provided in the magnetic steel grooves (1021). The motor rotor (10) according to any one of claims 2 to 5.

7. The outer shape of the magnetic steel (12) is installed to conform to the stopper wall (101) of the magnetic steel groove (1021). The motor rotor (10) according to claim 6.

8. The magnetic steel grooves (1021) are provided in all of the plurality of the mounting regions (102) adjacent along the radial direction, two adjacent magnetic steel grooves (1021) communicate with each other along the radial direction, and the stopper wall (101) is provided at a communicating portion of two adjacent magnetic steel grooves (1021). The motor rotor (10) according to claim 6 or 7.

9. A first boss (112) is provided on a side wall in the circumferential direction at a communicating portion of two adjacent magnetic steel grooves (1021), and a wall surface of the first boss (112) facing the central axis of the mounting frame (11) is the stopper wall (101). The motor rotor (10) according to claim 8.

10. The magnetic steel (12) has an integral structure and has a second boss (1211) installed to fit the stopper wall (101). Or, the magnetic steel (12) includes a plurality of blocks (121), at least some of the blocks (121) are installed along the radial direction, and of two adjacent blocks (121) in the radial direction, at least one side in the circumferential direction of the inner block (121) in the radial direction forms a third boss (1212) installed to fit the stopper wall (101) beyond the outer block (121) in the circumferential direction. The motor rotor (10) according to claim 9.

11. Two adjacent magnetic steel grooves (1021) are a first magnetic steel groove (1021a) and a second magnetic steel groove (1021b) located outside the first magnetic steel groove (1021a) in the radial direction, and a circumferential size outside the second magnetic steel groove (1021b) in the radial direction is larger than a circumferential size inside the second magnetic steel groove (1021b) in the radial direction, and both opposite sides in the circumferential direction outside the first magnetic steel groove (1021a) in the radial direction form the first boss (112) beyond the inside in the radial direction of the second magnetic steel groove (1021b) along the circumferential direction. The motor rotor (10) according to claim 9 or 10.

12. The plurality of magnetic steel grooves (1021) arranged in the radial direction form a first stepped structure (1101) in the axial direction, and a wall surface of the first stepped structure (1101) facing the central axis of the mounting frame (11) is the stopper wall (101). The motor rotor (10) according to any one of claims 8 to 11.

13. The motor rotor (10) according to claim 12, wherein in the axial direction, the radial distance of at least a part of the stopper wall (101) from the central axis of the mounting frame (11) is set to gradually increase.

14. The motor rotor (10) according to claim 12 or 13, wherein the radial distance of at least one of the stopper walls (101) from the central axis of the mounting frame (11) is greater than or smaller than the radial distances of two adjacent stopper walls (101) from the central axis of the mounting frame (11) along the axial direction.

15. The mounting frame (11) further includes a base body (113g), the first step structure (1101) is provided on the base body (113g), and the radial distance of at least one of the stopper walls (101) from the central axis of the mounting frame (11) is greater than the radial distance of the stopper wall (101) from the central axis of the mounting frame (11) that is away from the base body (113g) along the axial direction. The motor rotor (10) according to any one of claims 12 to 14.

16. The magnetic steel (12) has an integral structure and forms a second step structure (1201) that is installed to fit the stopper wall (101). Or, the magnetic steel (12) includes a plurality of blocks (121), at least some of the blocks (121) are installed along the radial direction, and among the plurality of adjacent blocks (121) in the radial direction, at least one side of the inner block (121) in the axial direction extends beyond the outer block (121) in the radial direction along the axial direction to form a third step structure (1202) that is installed to fit the stopper wall (101). The motor rotor (10) according to any one of claims 12 to 15.

17. The mounting frame (11) includes a plurality of frame bodies (113), and the plurality of frame bodies (113) are sequentially connected to form the first step structure (1101). The motor rotor (10) according to any one of claims 12 to 16.

18. At least a part of the frame body (113) is a first frame body (113a), and the number of the first frame bodies (113a) is plural. The plurality of first frame bodies (113a) are peripherally arranged in order from the inside to the outside along the radial direction and the thickness in the axial direction gradually increases to form the first step structure (1101). The motor rotor (10) according to claim 17.

19. At least a part of the frame body (113) is a second frame body (113b), and the second frame body (113b) and the first frame body (113a) are arranged in order along the axial direction to form the first step structure (1101) with the first frame body (113a). The motor rotor (10) according to claim 18.

20. At least a part of the frame body (113) is an annular third frame body (113c), and the number of the third frame bodies (113c) is plural. The plurality of third frame bodies (113c) are arranged in order along the axial direction, and the inner diameters of at least two adjacent third frame bodies (113c) are different to form the first step structure (1101). The motor rotor (10) according to claim 17.

21. At least a part of the frame body (113) is a fourth frame body (113d), and the fourth frame body (113d) includes a receiving member (1131d) and an annular member (1132d) provided on the receiving member (1131d). The third frame body (113c) and the receiving member (1131d) are distributed in order along the axial direction, and the annular member (1132d) is peripherally provided outside the plurality of third frame bodies (113c) in the radial direction. The motor rotor (10) according to claim 20.

22. The frame body (113) is of an integral structure or a split connection structure. The motor rotor (10) according to any one of claims 17 to 21.

23. The mounting frame (11) includes fifth frame bodies (113e) sequentially distributed along a plurality of axial directions. The magnetic steel groove (1021) is provided in the fifth frame body (113e), and the stopper walls (101) of the magnetic steel grooves (1021) of at least some adjacent fifth frame bodies (113e) are installed offset along the radial direction. The motor rotor (10) according to any one of claims 7 to 16.

24. Outward along the radial direction, the circumferential size of each of the magnetic steel grooves (1021) is set to increase gradually. The motor rotor (10) according to any one of claims 6 to 23.

25. The magnetic steel (12) includes a plurality of blocks (121). The plurality of blocks (121) are sequentially distributed along the radial direction, and / or the plurality of blocks (121) are sequentially distributed along the axial direction, and / or the plurality of blocks (121) are sequentially distributed along the circumferential direction. The motor rotor (10) according to any one of claims 1 to 24.

26. The blocks (121) adjacent along the radial direction are arranged or adhered with a gap. and / or the blocks (121) adjacent along the circumferential direction are arranged or adhered with a gap. The motor rotor (10) according to claim 25.

27. The magnetic steel (12) is installed on the surface of the mounting frame (11) in the axial direction, and the mounting frame (11) is provided with the stopper wall (101) located on the outer side in the radial direction of the magnetic steel (12). The motor rotor (10) according to any one of claims 1 to 3.

28. The mounting frame (11) is a permeable material member, or the mounting frame (11) is a non-permeable material member. The motor rotor (10) according to any one of claims 1 to 27.

29. A plurality of the magnetic steels (12) are installed. The plurality of magnetic steels (12) are sequentially distributed on the mounting frame (11) along the circumferential direction. The mounting frame (11) further includes a plurality of stopper structures (114) sequentially distributed along the circumferential direction. Each magnetic steel (12) is stoppered between two adjacent stopper structures (114) along the circumferential direction. The motor rotor (10) according to any one of claims 1 to 28.

30. The motor rotor (10) according to any one of claims 1 to 29, wherein the magnetic steel (12) is fixedly connected to the mounting frame (11).

31. The motor rotor (10) according to claim 30, wherein the magnetic steel (12) is press-fitted with the mounting frame (11), and / or the magnetic steel (12) is injection-connected to the mounting frame (11), and / or the magnetic steel (12) is adhesively fixed to the mounting frame (11).

32. The motor rotor (10) according to any one of claims 1 to 31, wherein the motor rotor (10) further includes a protection member (13), the magnetic steel (12) is exposed on one side or both sides along the axial direction of the mounting frame (11), and the protection member (13) is provided on the side where the magnetic steel (12) of the mounting frame (11) is exposed.

33. The motor rotor (10) according to claim 32, wherein the protection member (13) is a permeable material member.

34. The motor rotor (10) according to claim 32 or 33, wherein a positioning groove is provided in the protection member (13), and at least a part of the magnetic steel (12) is provided in the positioning groove.

35. The motor rotor (10) according to any one of claims 32 to 34, wherein a plurality of the mounting frames (11) are provided and are distributed in order along the axial direction, and the protection member (13) is provided between two adjacent mounting frames (11).

36. A plurality of the protection members (13) are provided and are distributed in order along the axial direction. The motor rotor (10) according to any one of claims 32 to 35, wherein a plurality of the mounting frames (11) distributed in order along the axial direction are provided between two adjacent protection members (13), and / or one of the mounting frames (11) is provided between two adjacent protection members (13), and the magnetic steel (12) is exposed on both sides along the axial direction of the mounting frame (11).

37. A motor (100) including the motor rotor (10) according to any one of claims 1 to 36.

38. A power train (1000) including the motor (100) according to claim 37.

39. An electric device, comprising the motor (100) according to claim 37 or the power train (1000) according to claim 38.

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