Motor rotors, motors, powertrains, 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 National Intellectual Property Administration 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 herein 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 improve 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, where 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] In the motor rotor according to the embodiment of this application, a stopper wall is installed on the mounting frame to resist the radial centrifugal motion of the magnetic steel. After the magnetic steel is mounted 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, thereby allowing the mounting frame to withstand relatively large stresses. This results in relatively high coupling reliability between the mounting frame and the magnetic steel, improving the problem of the magnetic steel flying out when the motor rotor rotates, and enabling the motor rotor to meet the requirements for high rotational speed operation.

[0009] In some embodiments, the mounting frame is provided with a plurality of mounting regions distributed radially, the magnetic steel is attached to the plurality of mounting regions, and a stopper wall is provided in at least one of the mounting regions.

[0010] By dividing the mounting frame into multiple mounting areas, the magnetic steel can be mounted in separate radial regions, which is advantageous in improving mounting reliability with the mounting frame and thereby improving the stress that the mounting frame can withstand against the magnetic steel. On the other hand, the radial centrifugal motion of the magnetic steel can be further resisted by the stopper wall, improving mounting reliability between the mounting frame and the magnetic steel, and thereby improving the stress that the mounting frame can withstand against the magnetic steel. When installed in this manner, the mounting frame has a relatively large stress tolerance 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 areas 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, allowing it to be mounted in divided regions, facilitating the mounting operation of the magnetic steel on the mounting frame, and providing relatively high mounting flexibility for the magnetic steel on the mounting frame. Furthermore, the partition member can divide the magnetic steel into multiple parts distributed sequentially along the radial direction, allowing each of these parts to form a spiral in cooperation with the stator, i.e., forming multiple small spirals and reducing spiral losses in the magnetic steel. In addition, the partition member can bring the stress of the mounting frame closer to the central axis, contributing to an improved ability of the mounting frame to withstand the magnetic steel.

[0013] In some embodiments, magnetic steel grooves are provided in multiple mounting areas adjacent to each other along the radial direction, stopper walls are provided in the magnetic steel grooves, a partition member is provided between two adjacent magnetic steel grooves, and the wall surface of the partition member toward the central axis of the mounting frame is the stopper wall of the magnetic steel groove on the radially inner side of the partition member.

[0014] By adopting the above technical proposal, at least a portion of the magnetic steel can be incorporated into the magnetic steel groove, and the partition member can further prevent the radial centrifugal motion of the magnetic steel, thereby firmly constraining the magnetic steel within the magnetic steel groove, which allows for secure mounting to the mounting frame and is advantageous for achieving high rotational speed effects of the motor rotor. Furthermore, the partition member can separate the magnetic steel, thereby dividing it into multiple parts distributed sequentially along the radial direction, which facilitates the installation of the magnetic steel and is advantageous for reducing vortex losses.

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

[0016] By adopting the above technical proposal, the mounting frame can resist the radial centrifugal motion of the magnetic steel through stopper walls distributed at intervals along multiple radial directions. This allows the mounting frame to distribute the force applied by the magnetic steel to the mounting frame during the rotation process along the radial directions. In other words, the force bearing points of the mounting frame are distributed along the radial directions and not concentrated at a single radial position. In this way, the stress at each radial position of the mounting frame can be reduced, thereby allowing the mounting frame to withstand relatively large stresses. Furthermore, the mounting reliability between the mounting frame and the magnetic steel is relatively high, meeting the requirements for high rotational speed operation of the motor rotor.

[0017] In some embodiments, a magnetic steel groove is provided in at least one mounting area, and a stopper wall is provided in the magnetic steel groove.

[0018] With this installation method, on the one hand, the mounting method for the magnetic steel mounting frame is sufficiently flexible and can be combined according to actual usage needs. On the other hand, at least a portion of the magnetic steel is mounted within the magnetic steel groove, and the magnetic steel can provide a circumferential restraining effect, which is advantageous in improving the mounting reliability between the magnetic steel and the mounting frame.

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

[0020] When installed in this manner, the surface area of ​​the magnetic steel wall facing the stopper wall in the radial direction can be as large as possible, meaning that the magnetic steel and the stopper wall have a relatively large facing area. In this way, during the rotation process of the motor rotor, the magnetic steel can completely adhere to and contact the stopper wall, which is advantageous in improving the stopper wall's resistance to the radial centrifugal motion of the magnetic steel, thereby improving the mounting reliability of the magnetic steel in the mounting frame, and is advantageous in meeting the requirements for high rotational speed operation of the motor rotor.

[0021] In some embodiments, magnetic steel grooves are provided in multiple mounting areas adjacent to each other along the radial direction, two adjacent magnetic steel grooves communicate along the radial direction, and a stopper wall is provided at the point where the two adjacent magnetic steel grooves communicate.

[0022] By adopting the above technical proposal, two adjacent magnetic steel grooves communicate radially, and a stopper wall is formed at the point of communication. With this installation, magnetic steel may also be installed at the radial communication point of two adjacent magnetic steel grooves, which is advantageous in improving the area occupied on one side of the mounting frame in the axial direction of the magnetic steel. In other words, a relatively large surface area of ​​the magnetic steel in the axial direction can be secured, reducing the waste of magnetic steel. Furthermore, it is advantageous for the magnetic steel to move the mounting frame with the action of the stator and rotate together, thereby improving the output efficiency of power output via the rotating shaft.

[0023] In some embodiments, a first boss is provided on the circumferential side wall of the communication point between 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 proposal, a first boss is provided on the circumferential side wall of the communication point between two adjacent magnetic steel grooves, and the mounting frame can resist the radial centrifugal motion of the magnetic steel by the stopper wall of the first boss. In this way, the magnetic steel groove can be formed on the mounting frame and the first boss can be formed at the same time, and thus the formation of the first boss and the stopper wall on it is sufficiently simple and easy to implement.

[0025] In some embodiments, the magnetic steel has a second boss which is integrally structured and fitted to 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 for 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 and extends beyond 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 be adapted to the stopper wall, facilitating improving the resistance ability of the magnetic steel on the stopper wall against 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 and extend beyond 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. Thus, it is advantageous for the second magnetic steel groove to be laid at the uppermost limit on the mounting frame, ensuring a relatively large area of the surface of the magnetic steel in the axial direction. 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 power output via 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, thus contributing to improving the resistance ability of the magnetic steel on the mounting frame against the centrifugal movement in the radial direction and contributing to improving the stability of the magnetic steel in the magnetic steel groove.

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

[0030] By adopting the above technical proposal, multiple positions in the radial direction of the mounting frame can all resist the radial centrifugal motion of the magnetic steel, which is advantageous for the stress distribution in the mounting frame. This contributes to improving the mounting frame's resistance to radial centrifugal motion of the magnetic steel, and thus helps the motor rotor meet the requirements for high rotational speed operation. Furthermore, in the radially outward direction, the axial size of the multiple magnetic steel grooves decreases sequentially. In this way, on the one hand, it is advantageous for the center of gravity of the magnetic steel to move toward the central axis of the mounting frame, which contributes to improving the overall structural stability of the motor rotor. On the other hand, in the radially outward direction, it contributes to increasing the axial size of the mounting frame, thus contributing to improving the stress that the radially outer portion of the mounting frame can withstand, and thus contributing to improving the mounting frame's resistance to radial centrifugal motion of the magnetic steel, thereby helping the motor rotor meet the requirements for high rotational speed operation.

[0031] In some embodiments, the radial distance of at least some of the stopper walls with respect to the central axis of the mounting frame is set to gradually increase in the axial direction.

[0032] By adopting the above technical proposal, it is advantageous to offset the center of the magnetic steel toward the central axis of the mounting frame, and accordingly, it is also advantageous to increase the axial size of the radially outer portion of the mounting frame, thereby improving the resistance of the mounting frame to the radial centrifugal motion of the magnetic steel. Furthermore, it facilitates the mounting operation of the magnetic steel on the mounting frame.

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

[0034] This installation method improves the relative axial stopper strength between the magnetic steel groove and the mounting frame, contributing to improved mounting reliability between the mounting frame and the magnetic steel, and further helping the motor rotor meet the requirements for high rotational speed operation.

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

[0036] This installation method improves the relative axial stopper strength between the magnetic steel groove and the mounting frame, contributing to improved mounting reliability between the mounting frame and the magnetic steel, and further helping the motor rotor meet the requirements for high rotational speed operation.

[0037] In some embodiments, the magnetic steel forms a second stepped structure that is integral and fitted to the stopper wall. Alternatively, the magnetic steel comprises a plurality of blocks, at least some of which are installed radially, and of the plurality of adjacent blocks radially, at least one side in the axial direction of the radially inner blocks extends beyond the radially outer blocks in the axial direction, forming a third stepped structure that conforms to the stopper wall.

[0038] By adopting the above technical proposal, the magnetic steel can be fitted to the stopper wall, and the resistance of the stopper wall to the magnetic steel against radial centrifugal motion can be easily improved, either by integrally installing the magnetic steel to form a second stepped structure, or by installing multiple blocks on the magnetic steel to form a third stepped structure due to the difference in size in the axial direction.

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

[0040] A mounting frame can be obtained by sequentially joining multiple frame bodies. This installation facilitates the formation of a first stepped structure on the mounting frame. Furthermore, the sequential joining of the multiple frame bodies facilitates the realization of the motor's oil passage processing process and allows for a relatively high degree of freedom in adding oil passages.

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

[0042] A mounting frame can be obtained by employing a first frame body that is annular and has multiple axial thicknesses, and by arranging the first frame bodies, whose thickness gradually increases, sequentially around the circumference along the radial direction. When installed in this manner, the molding operation of the mounting frame is sufficiently simple and easy to implement.

[0043] In some embodiments, at least a portion of the frame body is a second frame body, and the second frame body and the first frame body are installed sequentially along the axial direction to form a first stepped structure with the first frame body.

[0044] By employing a first frame body distributed sequentially along multiple radial directions, and a second frame body distributed along the axial direction in conjunction with the first frame body, the multiple frame bodies can be combined and arranged along the axial and radial directions, thereby forming a first stepped structure. This facilitates obtaining various different types of first stepped structures and offers relatively high flexibility.

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

[0046] A mounting frame can be obtained by employing multiple third frame bodies with at least some different inner diameters and arranging the third frame bodies sequentially along the axial direction. With this configuration, the molding operation of the mounting frame is sufficiently simple and easy to implement. Furthermore, by adjusting the position of multiple third frame bodies along the axial direction, different types of first stepped structures can be obtained, thus providing sufficient flexibility and versatility in the formation of the mounting frame.

[0047] In some embodiments, at least some of the frame bodies are fourth frame bodies, the fourth frame bodies including a receiving member and an annular member provided on the receiving member, the third frame bodies and the receiving member being distributed sequentially along the axial direction, and the annular member being provided circumferentially on the radially outer side of the plurality of third frame bodies.

[0048] By adopting the above technical proposal, multiple third frame bodies can achieve axial stoppers through the action of the receiving members and can also be constrained radially through the action of the annular members, thereby improving the overall stability of the mounting frame and contributing to improved mounting reliability of the mounting frame to the magnetic steel.

[0049] In some embodiments, the frame body is either a single-piece structure or a segmented connection structure.

[0050] By installing the frame body as a single integrated structure, the mounting frame can be constructed from multiple integrated frame bodies. By installing the frame body as a segmented connection structure, the frame body can be joined by multiple parts, and then multiple frame bodies can be joined to form a mounting frame. This is advantageous in improving the flexibility of the mounting frame's joints and facilitates the construction of various different types of first stepped structures.

[0051] In some embodiments, the mounting frame includes a fifth frame body distributed sequentially along a plurality of axial directions, the fifth frame body being provided with magnetic steel grooves, and the stopper walls of the magnetic steel grooves of at least some adjacent fifth frame bodies being offset radially.

[0052] By installing it in this way, a mounting frame that can distribute stress radially can be obtained by creating magnetic steel grooves in each fifth mounting frame and then joining multiple fifth mounting frames along the axial direction, which is quite convenient and easy to implement.

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

[0054] When installed in this manner, each magnetic steel groove may take on a shape such as a roughly fan-shaped or trapezoidal form when viewed from an axial perspective. This is advantageous for laying the magnetic steel grooves to the uppermost extent on the mounting frame and contributes to increasing the area occupied by the magnetic steel on one side of the mounting frame in the axial direction. In other words, a relatively large surface area of ​​the magnetic steel in the axial direction can be secured, which is advantageous for the magnetic steel to move the mounting frame and rotate together with it through the action of the stator, thereby improving the output efficiency of power output via the rotating shaft.

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

[0056] When installed in this manner, the flexible combination method of magnetic steel is sufficiently numerous and advantageous for fitting and installing the magnetic steel within multiple mounting areas of the mounting frame, thereby facilitating the stopper wall of the mounting frame to provide resistance to radial centrifugal motion relative to the mounting area.

[0057] In some embodiments, adjacent blocks along the radial direction are spaced apart or bonded together. And / or, adjacent blocks along the circumferential direction are spaced apart or bonded together.

[0058] By adopting the above technical proposal, magnetic field lines are less likely to pass through two adjacent blocks that are spaced apart or bonded together. Adjacent blocks along the radial direction can form a spiral on their own, and adjacent blocks along the circumferential direction can also form a spiral on their own. In other words, the spiral formed during motor operation can be reduced, contributing to a reduction in spiral losses.

[0059] In some embodiments, the magnetic steel is mounted on the axial surface of the mounting frame, and the mounting frame is provided with a stopper wall located radially outward of the magnetic steel.

[0060] By adopting the above technical proposal, a stopper wall is provided on the mounting frame, located radially outward from the magnetic steel. The stopper wall prevents the magnetic steel from moving inward along the radial direction, thereby resisting the radial centrifugal motion of the magnetic steel. As a result, the mounting frame can withstand relatively high stress levels for the magnetic steel, and the motor rotor can meet the demands of high rotational speed operation.

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

[0062] By adopting the above technical proposal, the mounting frame may be permeable or non-permeable. In other words, the material of the mounting frame can be selected relatively freely.

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

[0064] When installed in this manner, the stopper structure separates two adjacent magnetic steels, thus allowing the stopper structure to separate magnetic steels with different magnetic poles. This facilitates the magnetic steels to drive and rotate the entire motor rotor through the action of the stator, outputting power via the rotating shaft.

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

[0066] When installed in this manner, the relative position between the magnetic steel and the mounting frame is fixed. In this way, the stopper wall resists the radial centrifugal motion of the magnetic steel, and the fixed connection between the magnetic steel and the mounting frame allows the mounting frame to resist the radial centrifugal motion of the magnetic steel. This contributes to improving the mounting reliability between the mounting frame and the magnetic steel, and facilitates the realization of the effect of high rotational speeds.

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

[0068] By adopting the above technical proposal, the magnetic steel and the mounting frame can be fixed using at least one of the following methods: interference fit, injection molding, and adhesive fixing. In all cases, a relatively high level of mounting reliability can be achieved between the mounting frame and the magnetic steel.

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

[0070] The protective member is installed on the side of the mounting frame where the magnetic steel is exposed in the axial direction. By sealing the magnetic steel together with the mounting frame, the protective member can provide protection to the magnetic steel.

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

[0072] With this setup, torque output can be achieved by passing the main magnetic field, which is synchronized with the motor rotor, through the rotor. On the other hand, the magnetic permeability of the protective member shields the stator's harmonic magnetic field, reducing vortex losses. Furthermore, this reduces the vortex losses of the motor using this motor rotor, thereby increasing the motor's output efficiency.

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

[0074] When installed in this manner, the groove walls extending radially along the positioning groove toward the central axis of the mounting frame can resist the radial centrifugal motion of the magnetic steel. By improving the resistance of the magnetic steel of the motor rotor to radial centrifugal motion in this way, the structural stability and reliability of the motor rotor can be improved, which is advantageous for realizing the benefits of using the motor rotor at high rotational speeds.

[0075] In some embodiments, multiple mounting frames are installed and distributed sequentially along the axial direction, and protective members are provided between two adjacent mounting frames.

[0076] When installed in this manner, by placing a protective member between two adjacent mounting frames, one protective member can provide protection against the magnetic steel on both mounting frames. This reduces the amount of protective member needed, which is advantageous for achieving a miniaturized motor rotor design.

[0077] In some embodiments, multiple protective members are installed and distributed sequentially along the axial direction. Multiple mounting frames are installed between two adjacent protective members, distributed sequentially along the axial direction, and / or a single mounting frame is provided between two adjacent protective members, and the magnetic steel is exposed on both sides along the axial direction of the mounting frame.

[0078] When installed in this manner, the motor rotor can interact with the stators on opposite sides, making it easier for the two stators to drive and rotate one motor rotor, thereby improving 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 embodiments of this application, by employing the motor rotor according to each embodiment described above, allows the mounting frame to withstand relatively large stresses. Thus, the mounting frame and the magnetic steel have relatively high coupling reliability, meaning the motor rotor has relatively high structural reliability, and the problem of the magnetic steel flying out when the motor rotor rotates can be improved. Therefore, the motor can meet the requirements for high rotational speeds and has relatively high output efficiency.

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

[0082] The powertrain according to the embodiments of this application employs the motors according to each of the embodiments described above, thereby enabling the motors to meet the requirements for high rotational speed operation, providing relatively high output efficiency, and furthermore, relatively high power output efficiency of the powertrain.

[0083] According to a fourth aspect, embodiments of the present application further provide an electric device which includes a motor or powertrain.

[0084] The electric devices according to the embodiments of this application, by employing the motor or powertrain according to each of the embodiments described above, can output power with relatively high efficiency and better meet the demands of use.

[0085] The above description is merely an overview of the proposed technology of this application. In order to provide a clearer understanding of the technical means of this application, and to make the above and other objectives, features, and advantages of this application easier to understand, specific embodiments of this application will be described below. [Brief explanation of the drawing]

[0086] To more clearly illustrate the technical concepts in the embodiments of this application, the following briefly introduces the drawings that may be used in the embodiments or illustrative technical descriptions. It is obvious that the drawings in the following description are only a few embodiments of this application, and those skilled in the art can obtain other drawings based on these without expending any creative effort. [Figure 1] This is a schematic diagram of an electric device according to several embodiments of this application. [Figure 2] This is a schematic diagram of the structure of a motor according to several embodiments of this application. [Figure 3] This is a schematic diagram of the structure of a motor according to several embodiments of this application. [Figure 4] This is a schematic diagram of the structure of a motor according to several embodiments of this application. [Figure 5]This is a schematic diagram of the structure of a motor according to several embodiments of this application. [Figure 6] This is a schematic perspective view of a motor rotor according to several embodiments of this application. [Figure 7] Figure 6 is an exploded view of the motor rotor structure. [Figure 8] This is an exploded view of the structure of a motor rotor according to several embodiments of this application. [Figure 9] This is an exploded view of the structure of a motor rotor according to several embodiments of this application. [Figure 10] This is a schematic diagram of the structure of a motor rotor mounting frame according to several embodiments of this application. [Figure 11] This is a schematic diagram of the structure of a motor rotor mounting frame according to several embodiments of this application. [Figure 12] Figure 11 shows an enlarged view of point A. [Figure 13] This is a localized enlarged view of the motor rotor mounting frame according to some embodiments of this application. [Figure 14] This is a localized enlarged view of the motor rotor mounting frame according to some embodiments of this application. [Figure 15] This is a perspective view of the magnetic steel structure of a motor rotor according to several embodiments of this application. [Figure 16] This is a perspective view of the magnetic steel structure of a motor rotor according to several embodiments of this application. [Figure 17] This is a perspective view of the mounting frame for a motor rotor according to several embodiments of this application. [Figure 18] Figure 17 shows a cross-sectional view along BB. [Figure 19] This is a localized enlarged view of the motor rotor mounting frame according to some embodiments of this application. [Figure 20] This is a localized enlarged view of the motor rotor mounting frame according to some embodiments of this application. [Figure 21] This is a perspective view of the magnetic steel structure of a motor rotor according to several embodiments of this application. [Figure 22] This is a schematic diagram of the structure of the magnetic steel of a motor rotor according to some embodiments of this application. [Figure 23] This is a schematic diagram of the structure of the magnetic steel of a motor rotor according to some embodiments of this application. [Figure 24] This is a partially exploded view of a motor rotor according to several embodiments of this application. [Figure 25] Figure 24 shows a cross-sectional view of the motor rotor mounting frame after assembly. [Figure 26] This is a cross-sectional view of a motor rotor mounting frame according to several embodiments of this application. [Figure 27] This is a partially exploded view of a motor rotor according to several embodiments of this application. [Figure 28] Figure 27 shows a cross-sectional view of the motor rotor mounting frame after assembly. [Figure 29] This is an exploded view of a motor rotor mounting frame according to several embodiments of this application. [Figure 30] Figure 29 shows a cross-sectional view of the motor rotor mounting frame after assembly. [Figure 31] This is an exploded view of a motor rotor according to several embodiments of this application. [Figure 32] This is an exploded view of a motor rotor according to several embodiments of this application. [Modes for carrying out the invention]

[0087] The embodiments of this application are described in detail below, and the examples of such embodiments are shown in the drawings, where the same or similar reference numerals from beginning to end represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and for interpretation purposes only, and should not be understood as limitations thereto.

[0088] In the description of this application, it should be understood that the directions or positional relationships indicated by terms such as "length," "width," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are directions or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description in this application. They do not indicate or imply that the mentioned devices or elements have a specific direction or must be configured and operated in a specific direction, and therefore should not be understood as limitations on this application.

[0089] Furthermore, the terms "first" and "second" are merely for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features that are indicated. Thus, features limited by "first" and "second" may explicitly or implicitly include one or more such features.

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

[0091] In the description of this application, unless otherwise explicitly defined or limited, terms such as “attachment,” “connection,” “bonding,” and “fixing” should be understood in a broad sense. For example, a fixed connection may be a detachable connection or an integral connection, a mechanical connection may be an electrical connection, a direct connection may be an indirect connection through an intermediate medium, or an internal communication between two elements or an interaction relationship between two elements. A person skilled in the art will be able to understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0092] In the description of this application, the term "and / or" merely describes the relationship between related objects and indicates that three relationships may exist. For example, A and / or B may represent three cases: A, a combination of A and B, and B alone. In this application, the letter " / " generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0093] In the description of the embodiments of this application, unless otherwise explicitly defined or limited, the technical terms "proximity" and "adjacent" refer to being close in position. For example, if there are three members A1, A2 and B, and the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, meaning A2 is close to B, and B is close to A2, in other words, A2 and B are adjacent. Also, for example, if there are multiple C members, and these multiple C members are C1, C2...CN, and one of these C members, for example C2, is closer to B than the other C members, then B is close to C2, meaning C2 is close 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 to the magnetic steel. Specifically, when the motor rotor rotates, the magnetic steel generates a relatively large centrifugal force and also has a tendency toward relatively large radial centrifugal motion. Due to the relatively weak coupling ability between the magnetic steel and the mounting frame, the mounting frame has difficulty effectively resisting the radial centrifugal motion of the magnetic steel. In other words, the mounting frame has a relatively small stress tolerance to the magnetic steel, and there is a risk that the magnetic steel may break through the coupling relationship between the magnetic steel and the mounting frame and fly outwards, making it difficult to meet the high rotational speed requirements of the motor rotor.

[0096] In some cases, for surface-type motor rotors, magnetic steel is bonded to the surface of the mounting frame in the axial direction, specifically with liquid adhesive or solid adhesive. body Adhesion is achieved using adhesive. In adhesive methods, the degree of adhesion is inherently limited, and there is a risk that the magnetic steel may be ejected to the outside due to radial centrifugal motion when the motor rotor rotates at high speed.

[0097] Based on the above considerations, embodiments of this application provide a motor rotor, motor, powertrain and electric equipment, wherein the magnetic steel is mounted on the mounting frame, and 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, thereby allowing the mounting frame to withstand relatively large stresses, thereby providing relatively high coupling reliability between the mounting frame and the magnetic steel, improving the problem of the magnetic steel flying out when the motor rotor rotates, and allowing the motor rotor to meet the requirements for high rotational speed use.

[0098] The motors referred to in the embodiments of this application are also called electric motors, and a motor is generally composed of two parts: a motor rotor and a stator. A motor is a device that converts electrical energy into mechanical energy. Specifically, a motor uses energizing coils to generate a rotating magnetic field, which acts on the motor rotor to form magnetoelectric rotational torque. The fixed part of the motor is called the stator, and the rotating part of the motor is called the motor rotor.

[0099] Here, motors may be divided into radial motors and axial motors. A radial motor refers to a motor in which the stator and motor rotor are arranged radially. For example, the stator is located on the outer circumference of the motor rotor, i.e., the stator is fitted to the outer circumference of the motor rotor, or the motor rotor is located on the outer circumference of the stator, i.e., the motor rotor is fitted to the outer circumference of the stator. An axial motor refers to a motor in which the stator and motor rotor are arranged axially.

[0100] The motor rotor according to the embodiment of this application can be applied to motors. Specifically, the motor rotor can be used in axial motors, and of course, if the structure of the motor rotor matches the usage requirements of radial motors, it can also be applied to radial motors.

[0101] The motors referred to in the embodiments of this application can be used in powertrains as power sources, and can also be used in electric devices as power sources. The powertrains referred to in the embodiments of this application can also be used in electric devices as power sources.

[0102] Electric devices may include, but are not limited to, electric toys, power tools, electric bicycles, electric motorcycles, steamships, and aerospace vehicles. Electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric steamship toys, and electric airplane toys, and aerospace vehicles may include airplanes, rockets, space shuttles, and spacecraft.

[0103] The electric equipment may also be a vehicle or a vehicle chassis. The vehicle may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and 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 more of the devices such as a power supply, a controller, and a gearbox to form a powertrain.

[0104] To facilitate explanation, the embodiment of this application will be described using the example where the electric device is a vehicle.

[0105] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle according to some embodiments of the present application, the powertrain 1000 is installed inside the vehicle, and the powertrain 1000 may be installed at the bottom, front, or rear of the vehicle. The powertrain 1000 may be used to increase the power of the vehicle.

[0106] In some embodiments, the powertrain 1000 may include a motor 100, which powers the powertrain 1000. As can be understood, the powertrain 1000 is not limited to vehicle applications, but may also be applied to other electric devices that need to output power.

[0107] In some embodiments, the powertrain 1000 may further include a controller 400 and a battery 300, the controller 400 being used to control the operation of the powertrain 1000. For example, it controls the starting, shifting, and stopping of the powertrain 1000, specifically the starting, shifting, and stopping of the motor 100. The controller 400 may further be used to control the battery 300 to supply power to the powertrain 1000, specifically the battery 300 to supply power to the motor 100, for example, to meet the operating power consumption requirements during vehicle startup, navigation, and driving.

[0108] In some embodiments, the powertrain 1000 may further include a transmission 200, which is connected to an axial motor to change the torque of the axial motor. The transmission 200 (also called a gearbox) is a mechanism for changing the rotational speed and torque from the engine, and it can change the transmission ratio between the output shaft and the input shaft in a fixed or stepped manner.

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

[0110] To facilitate the explanation, the present invention will be described using the example where motor 100 is an axial motor.

[0111] Referring to Figures 2 to 5, Figures 2 to 5 show schematic diagrams of the structure of motors 100 according to multiple embodiments of this application. The motors 100 according to embodiments of this application include 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 of the motor rotor 10. Specifically, the stator 20 and the motor rotor 10 are installed sequentially along the axial direction Z.

[0112] The rotating shaft 30 refers to the axial structure in the motor 100 that outputs power. The rotating shaft 30 is fixedly connected to the motor rotor 10, and as the rotating shaft 30 is moved and rotated by the motor rotor 10, it can output power.

[0113] The stator 20 and the rotating shaft 30 can rotate relative to each other, and furthermore, 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, if the motor 100 includes a case, the stator 20 may be fixed to the case, with the case supporting the stator 20, and the motor rotor 10 and the rotating shaft 30 are rotatably mounted within the case, so that the stator 20 and the motor rotor 10 can rotate relative to each other, facilitating the stator 20 to drive and rotate the motor rotor 10.

[0114] The stator 20 is located on the side of the motor rotor 10, and is positioned on one side of the motor rotor 10 in the axial direction Z. As a result, the stator 20 drives the motor rotor 10 to rotate, and further moves the rotation shaft 30 to rotate.

[0115] Here, when the energizing coil in the stator 20 is energized, a magnetic field is generated, which acts on the motor rotor 10 to form a magnetoelectric power rotational torque, thereby causing the motor rotor 10 to rotate, and further moving the rotating shaft 30 to rotate together, and power is output via the rotating shaft 30.

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

[0117] In some embodiments, referring to Figure 3, the motor 100 includes two stators 20 and one motor rotor 10, where the two stators 20 are located on opposite sides of the motor rotor 10 in the axial direction Z. By driving and rotating the same motor rotor 10 with 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 Figure 4, the motor 100 includes two motor rotors 10 and one stator 20, the two motor rotors 10 being located on opposite sides of the stator 20 in the axial direction Z, and both motor rotors 10 being fixedly connected to a rotation shaft 30, so that one stator 20 can drive and rotate the same two motor rotors 10 and move and rotate the same rotation shaft 30 to increase output power, and the structure of such a motor 100 is more compact.

[0119] In some embodiments, referring to Figure 5, the motor 100 includes a plurality of motor rotors 10 and a plurality of stators 20, which 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, which in turn moves and rotates the rotation axis 30 to increase the output power.

[0120] As a supplementary explanation, the axial direction Z refers to the axial direction Z of the rotation axis 30, that is, the direction of the central axis of the rotation axis 30. The axial direction Z of the rotation axis 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] Radial direction Y refers to the radial direction Y of the rotation axis 30, that is, the radial direction of the rotation axis 30. The radial direction Y of the rotation axis 30 is also the radial direction Y of the stator 20 and the radial direction Y of the motor rotor 10. Therefore, 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 axis 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 motor rotor 10 in the preceding and succeeding paragraphs, the axial Z, circumferential X, and radial Y have the same meaning and will not be interpreted repeatedly.

[0124] Referring to both Figures 6 and 7, Figures 6 and 7 are perspective views of the motor rotor 10 of two embodiments of this application, respectively. The motor rotor 10 according to the embodiments of this application includes a mounting frame 11 and magnetic steel 12. 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 centrifugal motion 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, achieving a fixed connection effect between the motor rotor 10 and the rotating shaft 30. The mounting frame 11 has a central axis L that extends along the axial direction Z, and by rotating the mounting frame 11 around the central axis L, it can move and rotate the rotating shaft 30. Here, the mounting frame 11 is installed coaxially with the rotating shaft 30, and specifically, the central axis L of the mounting frame 11 is installed so as to coincide with the rotation axis of the rotating shaft 30.

[0127] In some possible designs, the mounting frame 11 may be mounted on a disc-shaped structure to facilitate stable rotation of the mounting frame 11. 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 that provides a magnetic field in the motor rotor 10. Here, the magnetic steel 12 generally refers to an aluminum-nickel-cobalt alloy, which is composed of several hard, strong metals. For example, the magnetic steel 12 may be composed of iron and aluminum, nickel, cobalt, etc. For example, the magnetic steel 12 may be composed of copper, niobium, tantalum, etc. When the motor 100 is operating, the stator 20 is energized to generate a magnetic field, which acts on the magnetic steel 12, causing the magnetic steel 12 to move and rotate the mounting frame 11, and further move and rotate the rotating shaft 30, thereby outputting power via the rotating shaft 30.

[0129] The stopper wall 101 refers to the wall surface of the mounting frame 11. The stopper wall 101 is positioned 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 motion 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 be aligned directly with 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 positioned 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] In the embodiment of this application, the motor rotor 10 is mounted on the mounting frame 11 by installing a stopper wall 101 on the mounting frame 11. After the magnetic steel 12 is mounted on the mounting frame 11, the mounting frame 11 can further resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by the stopper wall 101. That is, by mounting the magnetic steel 12 to the mounting frame 11, the mounting frame 11 can resist the centrifugal motion of the magnetic steel 12 in the radial direction Y through its coupling relationship with the magnetic steel 12. Furthermore, the mounting frame 11 can further resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by the stopper wall 101, thereby allowing the stopper wall 101 to share the stress on the mounting frame 11 caused by the centrifugal motion of the magnetic steel 12 in the radial direction Y, and the mounting frame 11 can withstand relatively large stresses. Thus, the mounting frame 11 and the magnetic steel 12 have relatively high coupling reliability, and the problem of the magnetic steel 12 flying out when the motor rotor 10 rotates can be improved, and therefore the motor rotor 10 can meet the requirements for high rotational speed use.

[0131] Here, the distribution pattern of the magnetic steel 12 may vary, and one or more magnetic steel 12 may be installed.

[0132] In some embodiments, multiple magnetic steels 12 may be distributed sequentially along the circumferential direction X on the mounting frame 11, specifically located at the outer circumference of the rotation axis 30. In some possible examples, one of the multiple magnetic steels 12 may correspond to one magnetic pole, such as the South Pole (S pole) or the North Pole. N It may also be the South Pole (S pole). The magnetic steels 12 with different magnetic poles are arranged offset along the circumferential direction X, that is, the distribution of the multiple 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. In some possible examples, each magnetic steel 12 has magnetic poles with opposite polarity, the South Pole (S pole) and the North Pole ( N It is the extreme.

[0133] In some embodiments, multiple magnetic steels 12 may be distributed sequentially along the radial direction Y on the mounting frame 11. In some possible examples, one magnetic steel 12 may correspond to one magnetic pole, such as the South Pole (S pole) or the North Pole. N The magnetic steels 12 may have opposite poles, and the magnetic steels 12 with different magnetic poles are offset along the radial direction Y. In some possible designs, each magnetic steel 12 has magnetic poles with opposite polarity.

[0134] In some embodiments, referring together to Figures 7 to 10, Figures 7 to 9 show exploded structural views of the motor rotor 10 according to three embodiments of this application, respectively, and Figure 10 is a schematic structural view of the mounting frame 11 of the motor rotor 10 according to some embodiments of this application. The mounting frame 11 is provided with a plurality of mounting areas 102, which are distributed sequentially along the radial direction Y. The magnetic steel 12 is attached to the plurality of mounting areas 102 which are distributed sequentially along the radial direction Y, and the stopper wall 101 is provided in at least one of the mounting areas 102.

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

[0136] A magnetic steel 12 at the same circumferential position X refers to a single magnetic steel 12. In this way, a single magnetic steel 12 may be simultaneously attached to multiple mounting regions 102 distributed sequentially along the radial direction Y. That is, the magnetic steel 12 may be attached to separate regions along the radial direction Y, thereby being mounted on the mounting frame 11.

[0137] The stopper wall 101 is installed in some of the mounting areas 102 of the multiple mounting areas 102, as shown in Figures 8 and 9. This portion of the mounting area 102 may be one mounting area 102 or multiple mounting areas 102, or the stopper area may be installed in all of the multiple mounting areas 102, as shown in Figures 7 and 10.

[0138] By dividing the mounting frame 11 into multiple mounting areas 102 and providing a stopper wall 101 in at least one of the mounting areas 102, the magnetic steel 12 can be mounted in separate areas in the radial direction Y, which is advantageous in improving the mounting reliability with the mounting frame 11, and thereby advantageous in 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 multiple mounting areas 102, the centrifugal motion of the magnetic steel 12 in the radial direction Y can be further resisted by the stopper wall 101, improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, and thereby improving the stress that the mounting frame 11 can withstand against the magnetic steel 12. When installed in this manner, the mounting frame 11 has a relatively large stress tolerance and can meet the high rotational speed requirements of the motor rotor 10.

[0139] In some embodiments, referring to both Figure 9 and Figure 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 multiple mounting areas 102 that are installed along the radial direction Y, and as shown in Figure 9, the number of mounting areas 102 in this part may be one or more. Alternatively, the stopper area may be installed in all of the multiple mounting areas 102, as shown in Figure 10.

[0141] The magnetic steel grooves 1021 are installed in some of the mounting areas 102, and there are multiple mounting areas 102 in this portion, i.e., there are multiple magnetic steel grooves 1021. The multiple magnetic steel grooves 1021 may be arranged continuously along the radial direction Y, and there may be mounting areas 102 in which no magnetic steel grooves 1021 are installed between two adjacent magnetic steel grooves 1021 along the radial direction Y.

[0142] As shown in Figure 9, as one example, the mounting frame 11 is divided into mounting regions 102 that are sequentially arranged along two radial directions Y. The inner mounting region 102 in the radial direction Y has magnetic steel grooves 1021, while the outer mounting region 102 in the radial direction Y does not have magnetic steel grooves 1021.

[0143] Here, the outer side in the radial direction Y refers to the side approaching the outer edge of the mounting frame 11 in the radial direction Y. For example, the mounting region 102 on the outer side in the radial direction Y refers to the mounting region 102 of the two mounting regions 102 that is relatively close to the outer edge of the mounting frame 11 in the radial direction Y. Accordingly, the inner side in the radial direction Y refers to the side approaching the central axis L of the mounting frame 11 in the radial direction Y. For example, the mounting region 102 on the inner side in the radial direction Y refers to the mounting region 102 of the two mounting regions 102 that is relatively far from the outer edge of the mounting frame 11 in the radial direction Y.

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

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

[0146] By adopting the above technical proposal, the magnetic steel 12 may be installed such that a portion of it in the radial direction Y is incorporated into the magnetic steel groove 1021 and another portion is placed on the surface of the mounting frame 11 corresponding to the mounting area 102, or it may be installed so that the entirety of it in the radial direction Y is incorporated into the magnetic steel groove 1021. With this installation, on the one hand, the mounting method of the magnetic steel 12 on the mounting frame 11 is sufficiently flexible and can be combined according to the actual usage requirements. On the other hand, at least a portion of the magnetic steel 12 is installed in the magnetic steel groove 1021, and the magnetic steel 12 can provide a restraining effect in the circumferential direction X, which is advantageous in improving the mounting reliability between the magnetic steel 12 and the mounting frame 11. Here, the axial direction Z of the portion of the magnetic steel 12 corresponding to the magnetic steel groove 1021 is partially or completely incorporated into the magnetic steel groove 1021.

[0147] A supplementary interpretation here is the case where the mounting frame 11 does not have a magnetic steel groove 1021, or where the mounting frame 11 has a magnetic steel groove 1021 and the magnetic steel groove 1021 is a concave groove. Based on this, both opposing sides of the mounting frame 11 in the axial direction Z can be divided into mounting regions 102 distributed sequentially along multiple radial directions Y. The case where the mounting frame 11 has a magnetic steel groove 1021 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 sequentially along multiple radial directions Y.

[0148] In some embodiments, referring to Figure 10, magnetic steel grooves 1021 are provided in multiple adjacent mounting areas 102 along the radial direction Y, and stopper walls 101 are provided in the magnetic steel grooves 1021.

[0149] To make it clear, magnetic steel grooves 1021 are provided in at least some of the multiple adjacent mounting areas 102 along the radial direction Y, and the number of at least some mounting areas 102 is multiple. That is, the multiple magnetic steel grooves 1021 are arranged continuously along the radial direction Y, and the mounting frame 11 has stopper walls 101 arranged at multiple intervals along the radial direction Y. Here, these at least some mounting areas 102 may be all of the multiple mounting areas 102 distributed sequentially along the radial direction Y, or they may be only some of them.

[0150] By adopting the above technical proposal, the mounting frame 11 can resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by stopper walls 101 distributed at intervals along multiple radial directions Y. As a result, the mounting frame 11 can distribute the force applied to the mounting frame 11 by the magnetic steel 12 during the rotation process along the radial direction Y. That is, the force bearing points of the mounting frame 11 are distributed along the radial direction Y and not concentrated at a single radial direction Y position. In this way, the stress at each radial direction Y position of the mounting frame 11 can be reduced, thereby allowing the mounting frame 11 to withstand relatively large stresses. Furthermore, the mounting reliability between the mounting frame 11 and the magnetic steel 12 is relatively high, and the requirement for high rotational speed operation of the motor rotor 10 can be met.

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

[0152] To make it easier to understand, in two adjacent mounting areas 102 along the radial direction Y, the wall surface of the mounting frame 11 of the partition member 111 toward the central axis L is the stopper wall 101 of the inner mounting area 102 in the radial direction Y.

[0153] By installing a partition member 111 between two adjacent mounting regions 102 in the radial direction Y, the partition member 111 resists the centrifugal motion of the magnetic steel 12 in the radial direction Y by the stopper wall 101, thereby improving the problem of the magnetic steel 12 flying out during the rotation process of the motor rotor 10. Furthermore, the partition member 111 can separate the magnetic steel 12, that is, the magnetic steel 12 can be divided into multiple parts distributed sequentially 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 mounted individually to the mounting region 102, while the magnetic steel 12 is mounted in divided regions, which is advantageous in improving the mounting reliability of the magnetic steel 12 on the mounting frame 11. On the other hand, it facilitates the mounting operation of the magnetic steel 12 on 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 of the mounting frame 11 in the axial direction Z. The partition member 111 can divide the magnetic steel 12 into multiple parts distributed sequentially along the radial direction Y, thereby allowing each of the multiple parts of the magnetic steel 12 to form a spiral in cooperation with the stator 20, that is, to form multiple small spirals, thereby reducing the spiral loss of the magnetic steel 12.

[0154] Furthermore, the partition member 111 is installed between two adjacent mounting areas 102, and by resisting the centrifugal motion of the magnetic steel 12 in the radial direction Y with the stopper wall 101, the stress on the mounting frame 11 due to the centrifugal motion of the magnetic steel 12 can be brought as close as possible to the central axis L of the mounting frame 11. In this way, it contributes to improving the stress that the mounting frame 11 can withstand on the magnetic steel 12, and further contributes to realizing the requirement for using the motor rotor 10 at high rotational speeds.

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

[0156] In some embodiments, referring to Figure 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 mounting frame 11 of the partition member 111 toward the central axis L is the stopper wall 101 of the inner magnetic steel groove 1021 in the radial direction Y of the partition member 111.

[0157] To make it easier to understand, 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 toward the central axis L of the mounting frame 11 is the groove wall of the magnetic steel groove 1021 toward the central axis L of the mounting frame 11, that is, the stopper wall 101 of the inner magnetic steel groove 1021 in the radial direction Y.

[0158] By adopting the above technical proposal, the partition member 111 separates two adjacent magnetic steel grooves 1021 along the radial direction Y. In this way, not only is it possible for at least a portion of the magnetic steel 12 to be incorporated into the magnetic steel grooves 1021, but the partition member 111 can also prevent the centrifugal motion of the magnetic steel 12 in the radial direction Y, thereby allowing the magnetic steel 12 to be sufficiently firmly confined within the magnetic steel grooves 1021, thereby enabling it to be firmly attached to the mounting frame 11, which is advantageous for realizing the high rotational speed effect of the motor rotor 10. Furthermore, the partition member 111 can separate the magnetic steel 12, thereby dividing the magnetic steel 12 into multiple parts distributed sequentially along the radial direction Y, which is advantageous for facilitating the installation of the magnetic steel 12 and reducing vortex losses.

[0159] In some embodiments, as shown in Figures 7 and 8, a partition member 111 may also be installed between two adjacent mounting areas 102 where no magnetic steel grooves 1021 are installed.

[0160] In some embodiments, as shown in Figure 9, a magnetic steel groove 1021 may not be installed in one of two adjacent mounting areas 102, while the other mounting area 102 has a magnetic steel groove 1021, and a partition member 111 may also be installed between these two mounting areas 102. The mounting area 102 having the magnetic steel groove 1021 may be located outside the radial direction Y of the mounting area 102 without the magnetic steel groove 1021, or inside the radial direction Y of the mounting area 102 without the magnetic steel groove 1021. Here, when the mounting area 102 having the magnetic steel groove 1021 is located inside the radial direction Y of the mounting area 102 without the magnetic steel groove 1021, the stopper wall 101 of the partition member 111 is the 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 Figures 6 and 7, the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z, and the mounting frame 11 is provided with a stopper wall 101 located on the radial side Y of the magnetic steel 12.

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

[0163] A fence member 115 may be installed on one surface of the mounting frame 11 along the axial direction Z, at a position approaching the outer edge of the mounting frame 11 along the radial direction Y, or on the outer edge of the mounting frame 11. The fence member 115 is located on the outside of the magnetic steel 12 in the radial direction Y, and the wall surface of the fence member 115 toward the central axis L of the mounting frame 11 along the radial direction Y is a stopper wall 101, which is used to resist the centrifugal motion of the magnetic steel 12 in the radial direction Y. Here, the fence member 115 may be a sleeve-shaped structure, and the sleeve-shaped structure is fitted around the outer circumference of a plurality of magnetic steels 12. Multiple fence members 115 may be installed, and the multiple fence members 115 are distributed sequentially along the circumferential direction X and are circumferentially provided around the outer circumference of the plurality of magnetic steels 12. Here, the fence member 115 and the other parts of the mounting frame 11 may be an integrally connected structure or a divided connected structure.

[0164] By adopting the above technical proposal, a stopper wall 101 is provided on the mounting frame 11, located on the outside of the magnetic steel 12 in the radial direction Y. The stopper wall 101 prevents the magnetic steel 12 from moving inward along the radial direction Y, thereby resisting the centrifugal motion of the magnetic steel 12 in the radial direction Y. As a result, the mounting frame 11 has the ability to withstand relatively high stress levels of the magnetic steel 12, and the motor rotor 10 can meet the demands of high rotational speed operation.

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

[0166] In this configuration, where the magnetic steel 12 is mounted on a surface of the mounting frame 11 along the axial direction Z, the mounting frame 11 may resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by a fence member 115, or by a partition member 111 between mounting regions 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 motion of the magnetic steel 12 in the radial direction Y by stopper walls 101 distributed at intervals along multiple radial directions Y, thereby distributing the force applied by the magnetic steel 12 to the mounting frame 11 along the radial direction Y, i.e., the force bearing positions of the mounting frame 11 are distributed along the radial direction Y and not concentrated at a single radial direction Y position. In this way, the stress at each radial Y position of the mounting frame 11 can be reduced, thereby allowing the mounting frame 11 to withstand relatively large stresses. Furthermore, the mounting reliability between the mounting frame 11 and the magnetic steel 12 is relatively high, and the requirement for high rotational speed operation of the motor rotor 10 can be met.

[0167] In some embodiments, referring to Figure 10, of the multiple mounting regions 102, the mounting region 102 that is 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 toward 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 Figure 7 and Figure 10, a stopper wall 101 is provided in each mounting area 102, and the stopper walls 101 of the multiple mounting areas 102 are distributed at intervals along the radial direction Y.

[0169] It should be explained that, in the case of the outermost mounting area 102 in the radial direction Y, when a magnetic steel groove 1021 is installed in this mounting area 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 area 102. If the magnetic steel groove 1021 is not installed in this mounting area 102, the 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 area 102.

[0170] Furthermore, for mounting areas 102 that are not the outermost in the radial direction Y, the wall surface of the mounting frame 11 of the partition member 111 facing the central axis L is the stopper wall 101 of the inner mounting area 102 in the radial direction Y. And, when the mounting area 102 has a magnetic steel groove 1021, the wall surface of the mounting frame 11 of the magnetic steel groove 1021 facing the central axis L is the stopper wall 101 of this mounting area 102, and is also the stopper wall 101 of the partition member 111 between this mounting area 102 and the outer mounting area 102 in the radial direction Y.

[0171] By adopting the above technical proposal, each of the multiple mounting regions 102 distributed sequentially along the radial direction Y has a stopper wall 101. In this way, the mounting frame 11 has multiple stopper walls 101 distributed sequentially along the radial direction Y, so that each of the multiple stopper walls 101 distributed sequentially along the radial direction Y can act as a stopper for the magnetic steel 12 and can resist the centrifugal motion of the magnetic steel 12 in the radial direction Y. That is, the mounting frame 11 can resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by the multiple stopper walls 101 distributed at intervals along the radial direction Y, and thereby the mounting frame 11 can distribute the force applied by the magnetic steel 12 to the mounting frame 11 during the rotation process along the radial direction Y, that is, the force-receiving positions of the mounting frame 11 are distributed along the radial direction Y and not concentrated at a single position in the radial direction Y. In this way, the stress at each radial Y position of the mounting frame 11 can be reduced, thereby allowing the mounting frame 11 to withstand relatively large stresses. Furthermore, the mounting reliability between the mounting frame 11 and the magnetic steel 12 is relatively high, and the requirement for high rotational speed operation of the motor rotor 10 can be met.

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

[0173] To make it clear, the wall surfaces of the magnetic steel 12 that face the stopper wall 101 are parallel to each other, so that the outer shape of the magnetic steel 12 conforms to the stopper wall 101.

[0174] When installed in this manner, the surface area of ​​the magnetic steel 12 facing the stopper wall 101 in the radial direction Y can be as large as possible, meaning that the magnetic steel 12 and the stopper wall 101 have a relatively large facing area. In this way, during the rotation process of the motor rotor 10, the magnetic steel 12 can completely adhere to and contact the stopper wall 101, which is advantageous in improving the stopper wall 101's resistance to the centrifugal motion of the magnetic steel 12 in the radial direction Y, thereby improving the mounting reliability of the magnetic steel 12 in the mounting frame 11, and is advantageous in meeting the requirements for high rotational speed operation of the motor rotor 10.

[0175] In some embodiments, referring together to Figures 11 to 17, Figures 11 to 14 and 17 show schematic diagrams of the structure of the mounting frame 11 of the motor rotor 10 according to multiple embodiments of this application, and Figures 15 and 16 show schematic diagrams of the magnetic steel 12 of the motor rotor 10 according to two embodiments of this application. Two adjacent magnetic steel grooves 1021 along the radial direction Y communicate along the radial direction Y, and a stopper wall 101 is provided at the point where the two adjacent magnetic steel grooves 1021 communicate along the radial direction Y.

[0176] To make it easier to understand, 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, with the second magnetic steel groove 1021b located on the radial side of the first magnetic steel groove 1021a. The radial side of the second magnetic steel groove 1021b communicates with the radial side of the first magnetic steel groove 1021a along the radial direction Y, thereby achieving a communication effect between the two adjacent magnetic steel grooves 1021 in the radial direction Y. 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 on the radial side Y.

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

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

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

[0180] A first boss 112 may be provided on the side wall in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, or on one side wall in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, as shown in Figure 14. Alternatively, a first boss 112 may be provided on both opposing side walls in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, as shown in Figures 11 to 13. This increases the contact area between the magnetic steel 12 and the stopper wall 101, which is advantageous in improving the stopper wall 101's resistance to the centrifugal motion 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] To make it easier to understand, magnetic steel grooves 1021 are made in three or more adjacent mounting regions 102 that are sequentially distributed along the radial direction Y. Two adjacent magnetic steel grooves 1021 communicate along the radial direction Y, and a first boss 112 is provided on one side wall in the circumferential direction X at the communication point. Based on this, the mounting frame 11 can form a plurality of first bosses 112 arranged sequentially along the radial direction Y on one side wall in the circumferential direction X.

[0182] Here, when a first boss 112 is provided on both opposing side walls in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, the stopper walls 101 of the first boss 112 on these opposing side walls may be located at the same position in the radial direction Y, or they may be distributed at intervals along the radial direction Y. In this way, the stress of the mounting frame 11 is better distributed along the radial direction Y, thereby improving the resistance of the magnetic steel 12 of the mounting frame 11 to centrifugal motion in the radial direction Y.

[0183] The first boss 112 refers to the portion that protrudes beyond the circumferential direction X at the point where two adjacent magnetic steel grooves 1021 communicate. The first boss 112 may be a stepped structure, specifically a rectangular step or a sawtooth step. The first boss 112 may also be an extended sheet-like, block-like, or other shaped structure. It should be explained that a step refers to a structure having two adjacent stepped surfaces, and one of the two stepped surfaces of the step is the stopper wall 101. For example, when the first boss 112 is a rectangular step, the two stepped surfaces are perpendicular to each other. For example, when the first boss 112 is a sawtooth step, the two stepped 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 inner magnetic steel groove 1021 in the radial direction Y.

[0185] By adopting the above technical proposal, a first boss 112 is provided on the side wall in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, and the mounting frame 11 can resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by the stopper wall 101 of the first boss 112. In this way, the formation of the magnetic steel grooves 1021 on the mounting frame 11 can be achieved at the same time as the formation of the first boss 112, and thus the formation of the first boss 112 and the stopper wall 101 on it is sufficiently simple and easy to implement.

[0186] Furthermore, the first boss 112 and the other parts of the mounting frame 11 may be connected as a single unit or as separate connections.

[0187] In some embodiments, referring to Figure 15 and in conjunction with other drawings, the magnetic steel 12 is a single-piece structure and has a second boss 1211 that is fitted into the stopper wall 101.

[0188] It should be explained that when a first boss 112 is installed on one side wall in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, a second boss 1211 is installed on one side wall in the circumferential direction X of the magnetic steel 12. The first boss 112 is installed on both opposing side walls in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, and the second boss 1211 is installed on both opposing side walls in the circumferential direction X of the magnetic steel 12.

[0189] The shape of the second boss 1211 conforms to the stopper wall 101 of the first boss 112. Specifically, the wall surface of the second boss 1211 that faces the stopper wall 101 of the first boss 112 is parallel to the stopper wall 101. That is, the wall surface of the second boss 1211 that faces 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 of the magnetic steel 12 that protrudes from one side or both opposing sides in the circumferential direction X is the second boss 1211.

[0191] When installed in this manner, the second boss 1211 is integrally mounted on the magnetic steel 12 to fit the stopper wall 101 of the first boss 112. During the rotation process of the motor rotor 10, the stopper wall 101 of the first boss 112 contacts the second boss 1211, thereby providing resistance to the centrifugal motion of the magnetic steel 12 in the radial direction Y. Thus, because the second boss 1211 has relatively high structural strength, the mounting frame 11 can relatively well resist the centrifugal motion of the magnetic steel 12 in the radial direction Y, provided that the stopper wall 101 contacts the second boss 1211 during the rotation process.

[0192] In some embodiments, referring to Figure 16 and in conjunction with other drawings, the magnetic steel 12 comprises a plurality of blocks 121, at least some of which are arranged sequentially along the radial direction Y. Of two adjacent blocks 121 in the radial direction Y, at least one side of the inner block 121 in the radial direction Y in the circumferential direction X extends beyond the outer block 121 in the radial direction Y along the circumferential direction X and is installed to fit into the stopper wall 101.

[0193] It should be explained that when a first boss 112 is installed on one side wall in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, one side of the inner block 121 in the radial direction Y extends beyond the outer block 121 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 to form a third boss 1212. The other side of the inner block 121 in the radial direction Y may extend beyond or be lower than the outer block 121 in the radial direction Y along the circumferential direction X, and consequently, the other side of the two adjacent blocks 121 in the circumferential direction X may be installed flush with the surface.

[0194] Furthermore, it should be explained that when the first boss 112 is installed on both opposing side walls in the circumferential direction X of the communication point of two adjacent magnetic steel grooves 1021, the opposing sides in the circumferential direction X of the inner block 121 in the radial direction Y, of the two adjacent blocks 121 in the radial direction Y, both extend beyond the outer edge of the outer block 121 in the radial direction Y along the circumferential direction X. That is, the two adjacent blocks 121 along the radial direction Y may be the first block 121a and the second block 121b, respectively, where the second block 121b is located outside the radial direction Y of the first block 121a, and the size of the circumferential direction X outside the radial direction Y of the first block 121a is larger than the size of the circumferential direction X inside the radial direction Y of the second block 121b. In this way, the 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 circumferential X dimension on the outer side of the radial Y direction of the first block 121a is size H10, and the circumferential X dimension on the inner side of the radial Y direction of the second block 121b is size H11.

[0196] Here, the portion of the inner block 121 in the radial direction Y that extends along the circumferential direction X beyond the outer block 121 in the radial direction Y may be a third boss 1212.

[0197] Here, the 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 that faces 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 that faces the stopper wall 101 of the first boss 112 is maximized, and furthermore, the area of ​​contact between the magnetic steel 12 and the stopper wall 101 of the first boss 112 is relatively large.

[0198] Two adjacent blocks 121 along the radial direction Y have a size difference in the circumferential direction X, forming a third boss 1212. During the rotation process of the motor rotor 10, the stopper wall 101 of the first boss 112 abuts against the third boss 1212, thereby providing resistance to the centrifugal motion of the magnetic steel 12 in the radial direction Y. This divides the magnetic steel 12 into multiple blocks 121, facilitating the flexible assembly of the magnetic steel 12 within the magnetic steel groove 1021, and achieving a matching effect between the third boss 1212 and the stopper wall 101 of the first boss 112.

[0199] By adopting the above technical proposal, the magnetic steel 12 can be fitted to the stopper wall 101, and the stopper wall 101 can be made to improve the resistance of the magnetic steel 12 to centrifugal motion in the radial direction Y of the magnetic steel 12, either by integrally installing the magnetic steel 12 to create a second boss 1211, or by installing multiple blocks 121 on the magnetic steel 12 to the size difference in the circumferential direction X.

[0200] In some embodiments, referring together to Figures 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, with the second magnetic steel groove 1021b located outside the radial direction Y of the first magnetic steel groove 1021a. The circumferential X size outside the radial direction Y of the second magnetic steel groove 1021b is larger than the circumferential X size inside the radial direction Y of the second magnetic steel groove 1021b, and both opposing sides in the circumferential X outside the radial direction Y of the first magnetic steel groove 1021a both extend beyond the inside and outside of the radial direction Y of the second magnetic steel groove 1021b along the circumferential X, forming the first boss 112.

[0201] To make it easier to understand, in the distribution direction of the second magnetic steel groove 1021b and the first magnetic steel groove 1021a, that is, in the inward direction of the radial direction Y, the circumferential X size of the second magnetic steel groove 1021b is set to be reduced. Specifically, the circumferential X size of the second magnetic steel groove 1021b on the outside of the radial direction Y is approximately H1, and the circumferential X size of the second magnetic steel groove 1021b on the inside of the radial direction Y is approximately H2, with size H1 being larger than size H2. Based on this, the groove formed by connecting and combining the first magnetic steel groove 1021a and the second magnetic steel groove 1021b exhibits a shape in which the middle part in the radial direction Y is designed to be constricted. That is, from the viewpoint in the axial direction Z, the second magnetic steel groove 1021b may exhibit a shape such as a trapezoid or a sector.

[0202] The circumferential size X on the outer radial Y of the first magnetic steel groove 1021a is larger than the circumferential size X on the inner radial Y of the second magnetic steel groove 1021b, and both opposing sides of the circumferential X on the outer radial Y of the first magnetic steel groove 1021a extend beyond the inner and outer radial Y of the second magnetic steel groove 1021b along the circumferential X, so that both opposing sides of the circumferential X at 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 size X on the outer radial 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 manner, on the one hand, the size of the second magnetic steel groove 1021b in the circumferential direction X is set to increase or decrease in the radial direction Y outward, which is advantageous for the second magnetic steel groove 1021b to be laid to the uppermost extent on the mounting frame 11, and contributes to increasing the area occupied by the magnetic steel 12 on one side of the mounting frame 11 in the axial direction Z. That is, a relatively large surface area of ​​the magnetic steel 12 in the axial direction Z can be secured, which is advantageous for the magnetic steel 12 to move the mounting frame 11 and rotate together with it due to the action of the stator 20, thereby improving the output efficiency of power output via the rotating shaft 30. On the other hand, stopper walls 101 are formed on both opposing 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 mounting frame 11's resistance to centrifugal motion of the magnetic steel 12 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, with reference to Figures 17 to 20 together and in conjunction with other drawings, Figures 17 to 20 show schematic diagrams of the mounting frame 11 of the motor rotor 10 according to four embodiments of this application. A first stepped 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 mounting frame 11 of the first stepped structure 1101 toward the central axis L is a stopper wall 101.

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

[0206] Of the first stepped structure 1101 formed in the axial direction Z, one stepped surface of one step faces the central axis L of the mounting frame 11 along the substantially radial direction Y, and this stepped surface is the stopper wall 101 of the inner magnetic steel groove 1021 in the radial direction Y, while the other stepped surface is installed facing substantially the axial direction Z.

[0207] The first stepped structure 1101 formed in the axial direction Z is arranged sequentially along the axial direction Z in the case of multiple steps, as shown in Figures 17 to 20. Based on this, the stopper walls 101 formed by the multiple steps are distributed sequentially 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 stepped structure 1101, a step is formed on the side wall in the axial direction Z of the communication position of two adjacent magnetic steel grooves 1021 along the radial direction Y, and the stopper wall 101 of this step is the stopper wall 101 of the inner magnetic steel groove 1021 in the radial direction Y.

[0209] By adopting the above technical proposal, a first stepped structure 1101 is formed in the axial direction Z of multiple magnetic steel grooves 1021 aligned along the radial direction Y, i.e., at least a part of the mounting frame 11 is the first stepped structure 1101, and the wall surface of the first stepped structure 1101 toward the central axis L of the mounting frame 11 is a stopper wall 101, thereby allowing the mounting frame 11 to resist the centrifugal motion of the magnetic steel 12 in the radial direction Y by the stopper wall 101 of the first stepped structure 1101. With the installation of the first stepped structure 1101, the first stepped structure 1101 has stopper walls 101 distributed sequentially along at least two radial directions Y. Thus, multiple positions in the radial direction Y of the mounting frame 11 can all resist the centrifugal motion of the magnetic steel 12 in the radial direction Y, which is advantageous for the stress distribution in the mounting frame 11. This contributes to improving the mounting frame 11's ability to resist the centrifugal motion of the magnetic steel 12 in the radial direction Y, and helps the motor rotor 10 meet the requirements for high rotational speed operation.

[0210] Furthermore, since the first stepped structure 1101 is formed in the axial direction Z by multiple magnetic steel grooves 1021 arranged along the radial direction Y, the axial Z size of the magnetic steel grooves 1021 located on the inside of the radial direction Y is larger than the axial Z size of the magnetic steel grooves 1021 located on the outside of the radial direction Y. That is, in the direction outward from the radial direction Y, the axial Z sizes of the multiple magnetic steel grooves 1021 decrease sequentially. In this way, on the one hand, the center of gravity of the magnetic steel 12 is advantageous in moving toward the central axis L of the mounting frame 11, and on the other hand, it contributes to improving the overall structural stability of the motor rotor 10. On the other hand, by contributing to increasing the axial size Z of the mounting frame 11 in the radial direction Y outward, thereby improving the stress-bearing capacity of the radially Y outer portion of the mounting frame 11, and by contributing to improving the resistance of the magnetic steel 12 of the entire mounting frame 11 to centrifugal motion in the radial direction Y, the requirement for high rotational speed use of the motor rotor 10 can be met.

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

[0212] To make it easier to understand, in the first stepped structure 1101 composed of multiple magnetic steel grooves 1021, the multiple stopper walls 101 are distributed sequentially along the axial direction Z. Thus, in a direction moving toward one side along the axial direction Z, the radial distance Y of at least some of the stopper walls 101 distributed sequentially along the axial direction Z with respect to the central axis L of the mounting frame 11 is set to increase gradually.

[0213] As shown in Figure 19, the radial distance Y of the mounting frame 11 of one of the stopper walls 101 with respect to the central axis L is size H4, and the radial distance Y of the mounting frame 11 of the other stopper walls 101 with respect to the central axis L is similar.

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

[0215] By adopting the above technical proposal, the radial Y distance of at least some of the stopper walls 101 with respect to the central axis L of the mounting frame 11 is set to gradually increase, and when the magnetic steel 12 fits into the magnetic steel groove 1021, the axial Z size of the magnetic steel 12 in the outward direction of radial Y can be reduced by a relatively large amount. In this way, it is advantageous for the center of the magnetic steel 12 to be offset toward the central axis L of the mounting frame 11, and accordingly it is also advantageous for increasing the axial Z size of the outer portion of the mounting frame 11 in the radial Y direction, thereby improving the resistance of the mounting frame 11 to the centrifugal motion of the magnetic steel 12 in the radial Y direction.

[0216] It should be explained that at least one side of the mounting frame 11 along the axial direction Z has an opening 103, which communicates with the magnetic steel groove 1021. When installed in this manner, the magnetic field lines from 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 Figures 17 and 18, the radial distance Y of all stopper walls 101 with respect to the central axis L of the mounting frame 11 is set to gradually increase in the direction toward one side along the axial direction Z. When installed in this manner, the opening 103 of the mounting frame 11 in the axial direction Z may be made to its maximum size, thus facilitating the mounting of the magnetic steel 12 in the magnetic steel groove 1021.

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

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

[0220] As shown in Figure 19, the 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 radial distance Y of the first stopper wall 101a with respect to the central axis L of the mounting frame 11 is size H4, the radial distance Y of the second stopper wall 101b with respect to the central axis L of the mounting frame 11 is size H5, and the radial distance Y of the third stopper wall 101c with respect to the central axis L of the mounting frame 11 is size H6. Size H5 is larger than sizes H4 and H6.

[0221] By adopting the above technical proposal, the first stepped structure 1101 has a fourth stopper wall 104 adjacent to the first stopper wall 101a, and a further 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 opposing 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 manner, at least a portion of the magnetic steel 12 can be stopped between these two spaced-apart fourth stopper walls 104 along the axial direction Z, that is, at least a portion of the magnetic steel 12 can be stopped within 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, contributing to improved mounting reliability between the mounting frame 11 and the magnetic steel 12, and further contributing to the motor rotor 10 meeting the requirements for high rotational speed operation.

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

[0223] It should be explained that, among the first stepped structure 1101 formed by multiple magnetic steel grooves 1021, the multiple stopper walls 101 in the first stepped structure 1101 are distributed sequentially along the axial direction Z, and the number of stopper walls 101 distributed sequentially along the axial direction Z is at least three.

[0224] As shown in Figure 20, the 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, and the radial distance Y of the fifth stopper wall 101d with respect to the central axis L of the mounting frame 11 is size H7, and the sixth stopperThe radial distance Y of the mounting frame 11 of the wall with respect to the central axis L is size H8, and the radial distance Y of the mounting frame 11 of the seventh stopper wall 101f with respect to the central axis L is size H9. Size H8 is smaller than sizes H7 and H9.

[0225] By adopting the above technical proposal, the first stepped structure 1101 has two eighth stopper walls 105 adjacent to the sixth stopper wall 101e, and the two eighth stopper walls 105 are each located on opposite sides along the axial direction Z of the sixth stopper wall 101e. When installed in this manner, a portion of the magnetic steel 12 may be located on the side of the first eighth stopper wall 105 away from the second eighth stopper wall 105 along the axial direction Z, and another portion of the magnetic steel 12 may be located on the side of the second eighth stopper wall 105 away from the first eighth stopper wall 105 along the axial direction Z. When installed in this manner, 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 requirements for high rotational speed operation.

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

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

[0228] As shown in Figure 20, the first stepped structure 1101 is provided on one side of the base body 113g in the axial direction Z. Alternatively, the first stepped structure 1101 is provided on both opposing sides of the base body 113g in the axial direction Z.

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

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

[0231] By adopting the above technical proposal, the first stepped structure 1101 has an eighth stopper wall 105 adjacent to the sixth stopper wall 101e, and the eighth stopper wall 105 is provided between the fifth stopper wall 101d and the sixth stopper wall 101e, and is distributed with a gap along the axial direction Z from the base body 113g. When installed in this manner, the wall surfaces of the eighth stopper wall 105 and the base body 113g facing the eighth stopper wall 105 along the axial direction Z may be the opposing 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 manner, at least a portion of the magnetic steel 12 can be stopped between the base body 113g and the eighth stopper wall 105 along the axial direction Z, that is, at least a portion 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 between the magnetic steel groove 1021 and the mounting frame 11 in the axial direction Z can be improved, contributing to improved mounting reliability between the mounting frame 11 and the magnetic steel 12, and further contributing to the motor rotor 10 meeting the requirements for high rotational speed operation. Furthermore, even with only two stopper walls 101 distributed sequentially along the radial direction Y installed on the mounting frame 11, the effect of distributing the stress on the mounting frame 11 along the radial direction Y can be achieved, and the stopper between the mounting frame 11 and the magnetic steel 12 in the axial direction Z can also be improved, thereby improving mounting reliability between the mounting frame 11 and the magnetic steel 12, and it can be applied to mounting frames 11 that are relatively thin and where it is difficult to install multiple stopper walls 101 in the axial direction Z.

[0232] In some embodiments, with reference to Figure 21 and in conjunction with other drawings, Figure 21 shows a schematic diagram of the structure of the magnetic steel 12 of the motor rotor 10 according to some embodiments of the present application. The magnetic steel 12 is a single-piece structure and forms a second stepped structure 1201, which is fitted into the stopper wall 101.

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

[0234] The magnetic steel 12 may have a second stepped structure 1201 formed on one side in the axial direction Z, or it may have a second stepped structure 1201 formed on both opposing sides in the axial direction Z. The second stepped structure 1201 formed by the magnetic steel 12 only needs to be able to fit into the stopper wall 101.

[0235] The external shape of the second stepped structure 1201 conforms to the stopper wall 101 of the first stepped structure 1101. Specifically, the second stepped structure 1201 has a wall surface that faces the stopper wall 101 of the first stepped structure 1101, and the wall surface of the second stepped structure 1201 that faces the stopper wall 101 of the first stepped structure 1101 is parallel to this corresponding stopper wall 101. That is, the wall surface of the second stepped structure 1201 that faces the stopper wall 101 in the first stepped structure 1101 has a relatively large area, or in other words, the magnetic steel 12 and the stopper wall 101 in the first stepped structure 1101 have a relatively large opposing area.

[0236] When installed in this manner, the second stepped structure 1201 is integrally installed on the magnetic steel 12 to fit the stopper wall 101 of the first stepped structure 1101. During the rotation process of the motor rotor 10, the stopper wall 101 of the first stepped structure 1101 comes into contact with the second stepped structure 1201, thereby providing resistance to the centrifugal motion of the magnetic steel 12 in the radial direction Y. Thus, because the second stepped structure 1201 has relatively high structural strength, the mounting frame 11 can relatively well resist the centrifugal motion of the magnetic steel 12 in the radial direction Y, provided that the stopper wall 101 comes into contact with the second stepped structure 1201 during the rotation process.

[0237] In some embodiments, the second stepped structure 1201 also has a wall surface that faces substantially along the axial direction Z. The wall surface of the second stepped structure 1201 that faces along the axial direction Z may conform to the stepped surface of the first stepped structure 1101 that is not the stopper wall 101. Specifically, the wall surface of the second stepped structure 1201 that faces along the axial direction Z may be parallel to the stepped surface of the first stepped structure 1101 that is not the stopper wall 101, thus facilitating adhesion between the two. This configuration contributes to the overall external shape of the magnetic steel 12 conforming to the internal shape of the magnetic steel 12, which is advantageous in improving the reliability of the magnetic steel 12 being incorporated into the magnetic steel groove 1021.

[0238] In some embodiments, with reference to Figure 22 and in conjunction with other drawings, Figure 22 shows a schematic diagram of the structure of the magnetic steel 12 of the motor rotor 10 according to some embodiments of the present application. The magnetic steel 12 comprises a plurality of blocks 121, at least some of which are arranged sequentially along the radial direction Y. Of the plurality of adjacent blocks 121 in the radial direction Y, at least one side of the inner block 121 in the radial direction Y in the axial direction Z extends beyond the outer block 121 in the radial direction Y along the axial direction Z, forming a third stepped structure 1202. Here, the third stepped structure 1202 is installed in accordance with a stopper wall 101.

[0239] It should be explained that two adjacent blocks 121 in the radial direction Y may be installed as follows: One side of the inner block 121 in the radial direction Y in the axial direction Z extends beyond the outer side of the outer block 121 in the radial direction Y along the axial direction Z, so that the two adjacent blocks 121 have a size difference in the axial direction Z. Based on this, the other side of the inner block 121 in the radial direction Y in the axial direction Z may extend beyond or be lower than the outer block 121 in the radial direction Y along the axial direction Z, and consequently, the other side of the two adjacent blocks 121 in the axial direction Z may be installed flush.

[0240] Furthermore, it should be explained that two adjacent blocks 121 in the radial direction Y may be arranged as follows: The opposing sides of the inner block 121 in the radial direction Y in the axial direction Z both extend beyond the outer side of the outer block 121 in the radial direction Y along the axial direction Z. That is, the two adjacent blocks 121 in the radial direction Y may be a first block 121a and a second block 121b, respectively, where the second block 121b is located outside the radial direction Y of the first block 121a, and the size of the axial direction Z outside the radial direction Y of the first block 121a is larger than the size of the axial direction Z 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] Furthermore, it should be explained that among the multiple adjacent blocks 121 along the radial direction Y, two adjacent blocks 121 may have a difference in height, and in this way, the multiple blocks 121 form the third stepped structure 1202.

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

[0243] By having multiple adjacent blocks 121 along the radial direction Y have a size difference in the axial direction Z, a third stepped structure 1202 is formed, and during the rotation process of the motor rotor 10, the stopper wall 101 of the first stepped structure 1101 abuts against the third stepped structure 1202, thereby providing resistance to the centrifugal motion of the magnetic steel 12 in the radial direction Y. Furthermore, dividing the magnetic steel 12 into multiple blocks 121 facilitates the flexible assembly of the magnetic steel 12 within the magnetic steel groove 1021, and achieves the effect of matching the third stepped structure 1202 with the stopper wall 101 of the first stepped structure 1101.

[0244] As an example, to accommodate the first stepped structure 1101 shown in Figures 17 and 18, the radial Y distance of all stopper walls 101 with respect to the central axis L of the mounting frame 11 is set to gradually increase in the direction toward one side along the axial Z. Correspondingly, the axial Z size of the magnetic steel 12 is set to decrease in the direction toward the outside of the radial Y.

[0245] In some embodiments, the third stepped structure 1202 also has a wall surface that faces substantially along the axial direction Z. The wall surface of the third stepped structure 1202 that faces along the axial direction Z may conform to the stepped surface of the first stepped structure 1101 that is not the stopper wall 101. Specifically, the wall surface of the third stepped structure 1202 that faces along the axial direction Z may be parallel to the stepped surface of the first stepped structure 1101 that is not the stopper wall 101, thus facilitating adhesion between the two. This configuration contributes to the overall external shape of the magnetic steel 12 conforming to the internal shape of the magnetic steel 12, which is advantageous in improving the reliability of the magnetic steel 12 being incorporated into the magnetic steel groove 1021.

[0246] By adopting the above technical proposal, the magnetic steel 12 can be fitted to the stopper wall 101, and the stopper wall 101 can be made to improve the resistance of the magnetic steel 12 to centrifugal motion in the radial direction Y of the magnetic steel 12 by installing the magnetic steel 12 as a whole to form a second stepped structure 1201, or by installing multiple blocks 121 on the magnetic steel 12 to the size difference in the axial direction Z.

[0247] In some embodiments, with reference to Figure 23 and in conjunction with other drawings, Figure 23 shows a schematic diagram of the structure of magnetic steel 12 according to some embodiments of the present application. The magnetic steel 12 may include a plurality of blocks 121, of which at least some of the blocks 121 are arranged sequentially along the axial direction Z.

[0248] It should be explained that the multiple stopper walls 101 in the first stepped structure 1101 are distributed sequentially along the axial direction Z. When at least some of the multiple blocks 121 are arranged sequentially 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 motion in the radial direction Y of at least one block 121 distributed sequentially along the axial direction Z. It should be further explained that, among the multiple stopper walls 101 distributed sequentially along the axial direction Z, one stopper wall 101 generally corresponds to one magnetic steel groove 1021. When installed in this manner, at least one block 121 may be installed in one magnetic steel groove 1021, making it easier for the magnetic steel 12 to be flexibly installed in the magnetic steel groove 1021.

[0249] In some embodiments, the mounting frame 11 is a one-piece molded structure.

[0250] In some embodiments, referring together to Figures 24 to 28, Figures 24 and 27 show partially exploded views of the motor rotor 10 according to two embodiments of the present application, Figure 25 shows a cross-sectional view of the mounting frame 11 of Figure 24, Figure 28 shows a cross-sectional view of the mounting frame 11 of Figure 27, and Figure 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, which are connected in sequence to form a first stepped structure 1101.

[0251] The mounting frame 11 can be obtained by sequentially joining multiple frame bodies 113. This installation facilitates the formation of the first stepped structure 1101 on the mounting frame 11. Furthermore, the sequential joining of the multiple frame bodies 113 facilitates the realization of the oil passage processing process for the motor 100 and provides a relatively high degree of freedom in adding oil passages.

[0252] It should be further explained that, among the multiple frame bodies 113, one of the frame bodies 113 contains the above-mentioned substrate 113g. Alternatively, multiple frame bodies 113 constitute the above-mentioned substrate 113g.

[0253] In some embodiments, referring to both Figures 24 and 25, at least some of the frame bodies 113 are first frame bodies 113a, and there are multiple first frame bodies 113a. The multiple first frame bodies 113a are arranged circumferentially from the inside out along the radial direction Y, and the thickness in the axial direction Z gradually increases to form a first stepped structure 1101.

[0254] It should be explained that the first frame body 113a has an annular structure. Furthermore, the inner circumference of each first frame body 113a has the stopper wall 101.

[0255] As shown in Figures 24 and 25, the multiple first frame bodies 113a are arranged sequentially along the radial direction Y. Specifically, the multiple first frame bodies 113a are arranged sequentially around the radial direction Y, and the axial thickness Z of the multiple first frame bodies 113a is set to gradually increase in the direction outward from the radial direction Y. To make it clear, of the multiple first frame bodies 113a arranged sequentially along the radial direction Y, the first frame bodies 113a on the outside of the radial direction Y are arranged around the outer circumference of the first frame bodies 113a on the inside of the radial direction Y, and are installed coaxially with the multiple first frame bodies 113a, that is, the central axis L of the multiple first frame bodies 113a is the central axis L of the mounting frame 11. Furthermore, the axial thickness Z of the first frame bodies 113a on the outside of the radial direction Y is greater than the axial thickness Z of the first frame bodies 113a on the inside of the radial direction Y. When installed in this manner, at least a portion of the inner circumference of each first frame body 113a may be used to resist the centrifugal motion of the magnetic steel 12 in the radial direction Y.

[0256] Furthermore, the multiple first frame bodies 113a have a difference in thickness in the axial direction Z, thereby forming a first stepped structure 1101. Specifically, at least a portion of the inner side of the multiple first frame bodies 113a in the radial direction Y can be formed by combining the above-mentioned first stepped structure 1101.

[0257] Furthermore, in the outward direction of radial Y, the axial thickness Z of the first frame body 113a on the radial Y side is greater than the axial thickness Z of the first frame body 113a on the radial Y side. Correspondingly, in the direction toward one side in the axial Z, the radial Y distance of the stopper wall 101 with respect to the central axis L of the mounting frame 11 is set to gradually increase. Thus, the multiple first frame bodies 113a of this embodiment can form the mounting frame 11 shown in Figures 17 and 18.

[0258] A mounting frame 11 can be obtained by employing a first frame body 113a with multiple annular shapes and varying thicknesses in the axial direction Z, and by arranging these first frame bodies 113a, whose thickness gradually increases, sequentially along the radial direction Y. When installed in this manner, the molding operation of the mounting frame 11 is sufficiently simple and easy to implement.

[0259] In some embodiments, referring to Figure 26 and in conjunction with other drawings, at least a portion of the frame body 113 is a second frame body 113b, and the second frame body 113b and the first frame body 113a are installed sequentially along the axial direction Z to form the first frame body 113a and the first stepped structure 1101.

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

[0261] In several possible designs, as shown in Figure 26, the second frame body 113b may be installed on one side of any one of the first frame bodies 113a in the axial direction Z, or the second frame body 113b may be installed on both opposing sides of any one of the first frame bodies 113a in the axial direction Z. Here, the inner diameter of the second frame body 113b may be larger than the inner diameter of each first frame body 113a, smaller than the inner diameter of each first frame body 113a, and 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, if the inner diameter of the second frame body 113b is larger than the inner diameter of the first frame body 113a, then the radial distance Y with respect to the central axis L on the inner circumference side of the second frame body 113b is also larger than the radial distance Y with respect to the central axis L on the inner circumference side of the first frame body 113a. Other sizes can be interpreted in a relatively similar manner, and no further explanation is provided here.

[0263] As an example, as shown in Figure 26, the second frame body 113b is installed on one side in the axial direction Z of the first frame body 113a, which has the maximum 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, thereby the first frame body 113a and the second frame body 113b can constitute the mounting frame 11 shown in Figures 17 and 8. In one embodiment, the mounting frame 11 shown in Figure 19 can be constructed when the inner diameter of the second frame body 113b is smaller than the inner diameter of at least one first frame body 113a.

[0264] By employing a first frame body 113a distributed sequentially along multiple radial directions Y, and a second frame body 113b distributed along the axial direction Z with the first frame body 113a, the multiple frame bodies 113 can be combined and arranged along the axial direction Z and radial direction Y, thereby forming a first stepped structure 1101. This facilitates obtaining various different types of first stepped structures 1101 and offers relatively high flexibility.

[0265] In some embodiments, referring together to Figures 27 and 28, and in conjunction with other drawings, Figure 27 shows an exploded view of the mounting frame 11 of the motor rotor 10 according to some embodiments of the present application, and Figure 28 shows an assembled cross-sectional view of the mounting frame 11 shown in Figure 27. At least some of the frame bodies 113 are third frame bodies 113c, the third frame bodies 113c are annular, and there are multiple third frame bodies 113c. The multiple third frame bodies 113c are arranged sequentially along the axial direction Z, and the inner diameters of at least two adjacent third frame bodies 113c are different to form a first stepped structure 1101.

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

[0267] Furthermore, it should be explained that the inner diameters of at least two adjacent third frame bodies 113c are different, and a first stepped structure 1101 can be formed. Specifically, at least a portion of the inner side of a plurality of third frame bodies 113c in the radial direction Y can be formed by combining the first stepped 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 towards one side in the axial direction Z, the inner diameters of the plurality of third frame bodies 113c gradually increase, and correspondingly, the radial distance Y of the mounting frame 11 of the plurality of stoppers 101 from 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 also 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, 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 realize. And by adjusting the positions of the plurality of third frame bodies 113c along the axial direction Z, different types of first step structures 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 conjunction 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 radial direction Y of the plurality of third frame bodies 113c.

[0272] As can be understood, the receiving member 1131d is installed on one side of the overall axial direction Z formed by the 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 113 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 restricted 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] As a supplementary explanation, 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 Figures 27 and 28, and in conjunction with other drawings, the fourth frame body 113d may further include the first intermediate member 1133d, and a plurality of third frame bodies 113c are arranged around the outer circumference of the first intermediate member 1133d and are installed coaxially with the first intermediate member 1133d. When installed in this manner, the radial Y position between the third frame body 113c and the first intermediate member 1133d can also form a magnetic steel groove 1021.

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

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

[0278] In some embodiments, the frame body 113 is either a single-piece structure or a segmented connection structure.

[0279] To make it clear, the first frame body 113a, the second frame body 113b, the third frame body 113c, the fourth frame body 113d, and the sixth frame body 113f may all be a single, integrated structure or a divided, connected structure.

[0280] For example, when the fourth frame body 113d is 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 is a segmented connection structure, at least two of the annular member 1132d, the receiving member 1131d, and the first intermediate member 1133d are segmented and connected.

[0281] By installing the frame body 113 in an integrated structure, the mounting frame 11 can be constructed from multiple integrally installed frame bodies 113. By installing the frame body 113 in a segmented connection structure, the frame body 113 can be joined by multiple parts, and then multiple frame bodies 113 can be joined to form the mounting frame 11, which is advantageous in improving the joining flexibility of the mounting frame 11 and facilitates the construction of various different types of first stepped structures 1101. Here, when the frame body 113 is a segmented connection structure, the frame body 113 can be formed by joining multiple parts of the frame body 113 along at least one of the directions such as the radial direction Y, the axial direction Z, and the circumferential direction X.

[0282] In some embodiments, multiple frame bodies 113 can be joined along at least one of the following directions: axial Z, radial Y, circumferential X, etc., thereby allowing for free and flexible joining to form the mounting frame 11. Furthermore, this facilitates the realization of the oil passage processing process for the motor 100 and provides a relatively high degree of freedom in adding oil passages.

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

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

[0285] To make it clear, the groove wall of the mounting frame 11 of the magnetic steel groove 1021 facing the central axis L is the stopper wall 101. The stopper walls 101 of the magnetic steel grooves 1021 of two adjacent fifth frame bodies 113e are offset along the radial direction Y, so that the stopper walls 101 of the magnetic steel grooves 1021 of two adjacent fifth frame bodies 113e are spaced apart along the radial direction Y.

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

[0287] When installed in this manner, the mounting frame 11 can distribute stress along the radial direction Y by forming multiple stopper walls 101 distributed at intervals along the radial direction Y, and further improves the mounting frame 11's ability to withstand the centrifugal motion of the magnetic steel 12 in the radial direction Y. Then, by creating magnetic steel grooves 1021 on each fifth mounting frame 11 and subsequently joining multiple fifth mounting frames 11 along the axial direction Z, a mounting frame 11 that can distribute stress along the radial direction Y can be obtained, which is sufficiently convenient and easy to implement.

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

[0289] To make it clear, the outer circumferential X size of each magnetic steel groove 1021 in the radial Y direction is larger than the inner circumferential X size of the same magnetic steel groove 1021 in the radial Y direction.

[0290] When installed in this manner, each magnetic steel groove 1021 may take on a shape such as a roughly fan-shaped or trapezoidal shape from the viewpoint in the axial direction Z. This is advantageous for laying the magnetic steel grooves 1021 to the uppermost extent on the mounting frame 11 and contributes to increasing the area occupied by the magnetic steel 12 on one side of the mounting frame 11 in the axial direction Z. In other words, a relatively large surface area of ​​the magnetic steel 12 in the axial direction Z can be secured, which is advantageous for the magnetic steel 12 to move and rotate together with the mounting frame 11 due to the action of the stator 20, thereby improving the output efficiency of power output via the rotating shaft 30.

[0291] In some embodiments, the magnetic steel 12 is a segmented connection structure. Referring together to Figures 6 to 9, Figure 16, Figures 22 and 23, and in conjunction with other drawings, the magnetic steel 12 may be divided into multiple parts, as can be understood by including multiple blocks 121.

[0292] In some embodiments, as shown in FIGS. 6 to 9, FIGS. 16 and 22, and in combination 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. Furthermore, they may be joined in combination along at least two of the axial direction Z, circumferential direction X, and radial direction Y. Thus, 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 in a fitting manner 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.

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

[0299] It should be explained that the magnetic steel 12 may be bonded by methods such as adhesive fixing, attaching with adhesive tape, applying adhesive, or covering with a film. Here, the adhesive used in the adhesive application may be a solid adhesive, a liquid adhesive, or the like.

[0300] By adopting the above technical proposal, magnetic field lines are less likely to pass through two adjacent blocks 121 that are spaced apart or bonded together. Adjacent blocks 121 along the radial direction Y can form a spiral on their own, and adjacent blocks 121 along the circumferential direction X can also form a spiral on their own. That is, the spiral formed during the operation of the motor 100 can be reduced, contributing to a reduction in spiral losses.

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

[0302] To make it easier to understand, the mounting frame 11 has a magnetic permeability function.

[0303] Specifically, the mounting frame 11 is manufactured from a permeable material. The permeable material may include silicon steel sheets, manganese zinc ferrite, nickel zinc ferrite, iron-cobalt alloys, soft ferrite, amorphous soft magnetic alloys, and ultracrystalline soft magnetic alloys. The mounting frame 11 may further be manufactured from a soft magnetic material, for example, by a winding core or powder metallurgy. For example, a winding core may be formed by winding a silicon steel sheet, which is easier to manufacture by an additive formula and can better reduce vortex losses. Soft magnetic materials refer to materials that are easily magnetized and easily demagnetized. For example, soft magnetic materials may include pure iron, low carbon steel, iron-silicon alloys, iron-aluminum alloys, iron-silicon-aluminum alloys, nickel-iron alloys, iron-cobalt alloys, soft ferrite, amorphous soft magnetic alloys, and ultracrystalline soft magnetic alloys.

[0304] By adopting the above technical proposal, the mounting frame 11 can form a permeable plate. When installed in this manner, magnetic field lines can penetrate the entire structure formed by the magnetic steel 12 and the mounting frame 11 along the axial direction Z, thereby expanding the range of magnetic field lines, contributing to improved structural stability of the motor rotor 10, and meeting the requirements for high rotational speed operation.

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

[0306] When installed in this manner, the mounting frame 11 is not permeable to magnetism, meaning it functions as a retaining frame.

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

[0308] To make it easier to understand, each stopper structure 114 and each magnetic steel 12 are distributed alternately along the circumferential direction X. That is, the distribution direction of multiple stopper structures 114 and multiple magnetic steels 12 is stopper structure 114, magnetic steel 12, stopper structure 114, magnetic steel 12... and we can infer this from there.

[0309] What needs to be explained here is that the multiple stopper structures 114 adjacent to each other along the circumferential direction X divide the mounting frame 11 into multiple regions distributed sequentially along the circumferential direction X, and multiple mounting regions 102 distributed sequentially along the radial direction Y are installed in each region.

[0310] When a magnetic steel groove 1021 is provided in the mounting area 102, the opposing sides of two adjacent stopper structures 114 along the circumferential direction X are the opposing side walls of the corresponding magnetic steel groove 1021 in the circumferential direction X. Based on this, when a first boss 112 is installed on the side wall in the circumferential direction X of the communication point between two adjacent magnetic steel grooves 1021, this first boss 112 is installed on the stopper structure 114.

[0311] It should be further explained that, as shown in Figures 17, 24, 31, and 32, and connecting with other drawings, when multiple magnetic steel grooves 1021 aligned in the radial direction Y form a first stepped structure 1101 in the axial direction Z, and when the steps of each step in the first stepped structure 1101 are annular, the stopper structure 114 requires the installation of a corresponding stepped structure, thereby allowing the stopper structure 114 to conform to the stepped structure and facilitating its installation on the first stepped structure 1101.

[0312] Here, in the stepped structure formed by the stopper structure 114, the wall surface of the first stepped structure 1101 that faces the stopper wall 101 may be parallel to the stopper wall 101, and the wall surface of the first stepped structure 1101 that faces a stepped surface other than the stopper wall 101 along the axial direction Z may be installed parallel to the corresponding stepped surface other than the stopper wall 101 of the first stepped structure 1101. In this way, the stopper structure 114 is compatible with the first stepped structure 1101 and facilitates the stable assembly of the stopper structure 114.

[0313] When installed in this manner, the stopper structure 114 separates two adjacent magnetic steels 12, thus allowing the stopper structure 114 to separate magnetic steels 12 with different magnetic poles, facilitating the magnetic steels 12 to drive and rotate the entire motor rotor 10 through 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 mounting frame 11.

[0315] When installed in this manner, 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 motion of the magnetic steel 12 in the radial direction Y, and the fixed connection between the magnetic steel 12 and the mounting frame 11 allows the mounting frame 11 to resist the centrifugal motion of the magnetic steel 12 in the radial direction Y. This contributes to improving the mounting reliability between the mounting frame 11 and the magnetic steel 12, and facilitates the realization of the effect of high rotational speed.

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

[0317] To make it easier to understand, when a magnetic steel groove 1021 is provided in the mounting area 102, at least a portion of the magnetic steel 12 is interlocked with the magnetic steel groove 1021.

[0318] In some embodiments, the magnetic steel 12 may be injection-connected to 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 is bonded to the mounting frame 11, and bonding may be achieved by methods such as attaching it with adhesive tape, applying adhesive, and covering it with a film. Here, the adhesive used in the adhesive application may be a solid adhesive, a liquid adhesive, or the like.

[0321] By adopting the above technical proposal, the magnetic steel 12 and the mounting frame 11 can be fixed together using at least one of the following methods: interference fit, injection molding, and adhesive fixing. In all cases, a relatively high level of mounting reliability can be achieved between the mounting frame 11 and the magnetic steel 12.

[0322] As a supplementary point to explain, when at least a portion of the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z, the magnetic steel 12 and the mounting frame 11 can be fixed by at least one of injection molding and adhesive fixing. When at least a portion of the magnetic steel 12 is installed in the magnetic steel groove 1021, the portion incorporated into the magnetic steel groove 1021 and the magnetic steel groove 1021 can be fixed by at least one of interference fit, injection molding and adhesive fixing.

[0323] As further explanation, when at least a portion of the magnetic steel 12 is installed on the surface of the mounting frame 11 in the axial direction Z, and another portion is installed in the magnetic steel groove 1021, the portion of the magnetic steel 12 can be fixed to the surface of the mounting frame 11 by at least one of injection jointing and adhesive fixing, and the portion of the magnetic steel 12 to be installed in the magnetic steel groove 1021 can be fixed by at least one of interference fit, injection jointing and adhesive fixing.

[0324] In some embodiments, referring together to Figures 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 or both opposing sides along the axial Z of the mounting frame 11, and the protective member 13 is provided on the side of the mounting frame 11 where the magnetic steel 12 is exposed.

[0325] In several possible designs, one side surface of the mounting frame 11 in the axial Z direction is used to install the magnetic steel 12, or the mounting frame 11 has a magnetic steel groove 1021, which is located on one side of the mounting frame 11 in the axial Z direction and is a recessed groove. Based on this, the magnetic steel 12 is exposed on one side of the mounting frame 11 along the axial Z direction, and the protective member 13 covers the magnetic steel 12 which is located on one side of the mounting frame 11 along the axial Z direction and is exposed along the axial Z direction.

[0326] In several possible designs, the opposing surfaces mounted in the axial direction Z are both used to install the magnetic steel 12, or the magnetic steel groove 1021 is installed as a through groove that penetrates the mounting frame 11 along the axial direction Z, or the magnetic steel groove 1021 is a recessed groove and both opposing 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 opposing sides of the mounting frame 11 in the axial direction Z, and protective members 13 are installed on both opposing sides of the mounting frame 11 in the axial direction Z.

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

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

[0329] To make it easier to understand, the protective member 13 has a magnetic permeability function.

[0330] Specifically, the protective member 13 is manufactured from a permeable material. The permeable material may include silicon steel sheets, manganese zinc ferrite, nickel zinc ferrite, iron cobalt alloys, soft ferrite, amorphous soft magnetic alloys, and ultracrystalline soft magnetic alloys. The protective member 13 may further be manufactured from a soft magnetic material, for example, by a winding core or powder metallurgy. For example, a winding core may be formed by winding a silicon steel sheet, which is easier to manufacture by an additive formula and can better reduce vortex losses. Soft magnetic materials refer to materials that are easily magnetized and easily demagnetized. For example, soft magnetic materials may include pure iron, low carbon steel, iron silicon alloys, iron aluminum alloys, iron silicon aluminum alloys, nickel iron alloys, iron cobalt alloys, soft ferrite, amorphous soft magnetic alloys, and ultracrystalline soft magnetic alloys.

[0331] By adopting the above technical proposal, the protective member 13 can form a permeable plate. When installed in this manner, on the one hand, torque output can be achieved by passing the main magnetic field synchronized with the motor rotor 10 through it. On the other hand, the permeability of the protective member 13 shields the harmonic magnetic field of the stator 20, reducing vortex losses, and further reducing the vortex losses of the motor 100 using this motor rotor 10, thereby increasing 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 portion of the magnetic steel 12 is provided within the positioning groove.

[0333] To make it clear, the magnetic steel 12 is mounted on the surface of the mounting frame 11 in the axial direction Z, and at least a portion of the magnetic steel 12 in the axial direction Z is incorporated into the positioning groove of the protective member 13. Alternatively, a portion of the magnetic steel 12 in the axial direction Z is incorporated into the magnetic steel groove 1021, and another portion is incorporated into the positioning groove.

[0334] When installed in this manner, the groove walls of the mounting frame 11, which are aligned with the radial Y direction of the positioning groove and toward the central axis L, can resist the centrifugal motion of the magnetic steel 12 in the radial Y direction. By improving the motor rotor 10's ability to resist the centrifugal motion of the magnetic steel 12 in the radial Y direction, the structural stability and reliability of the motor rotor 10 can be improved, which is advantageous for realizing the benefits of using the motor rotor 10 at high rotational speeds.

[0335] In some embodiments, referring to Figure 31 and in conjunction with other drawings, there are multiple mounting frames 11, and the multiple mounting frames 11 are distributed sequentially along the axial direction Z, and the protective member 13 is provided between two adjacent mounting frames 11.

[0336] To make it easier to understand, in two adjacent mounting frames 11 along the axial direction Z, the magnetic steel 12 in at least one of the mounting frames 11 is exposed on the side facing the other mounting frame 11, that is, the magnetic steel 12 of the two mounting frames 11 is exposed on at least the opposing sides of the mounting frames 11.

[0337] When installed in this manner, by placing the protective member 13 between two adjacent mounting frames 11, one protective member 13 can provide a protective effect against the magnetic steel 12 on both mounting frames 11. This reduces the number of protective members 13 used, which is advantageous for achieving a miniaturized design of the motor rotor 10.

[0338] In some embodiments, referring to Figure 32 and in conjunction with other drawings, multiple protective members 13 are installed, and the multiple protective members 13 are distributed sequentially along the axial direction Z.

[0339] In some embodiments, referring to Figure 32 and linking to other drawings, a plurality of mounting frames 11 are installed between two adjacent protective members 13, and the plurality of mounting frames 11 located between the two protective members 13 are distributed sequentially along the axial direction Z.

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

[0341] In some embodiments, a 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.

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

[0343] In some embodiments, when multiple protective plates and mounting frames 11 are installed, the two above-mentioned solutions may be installed simultaneously, that is, some protective plates and mounting frames 11 satisfy the configuration shown in Figure 32, while other protective plates and mounting frames 11 satisfy a configuration in which 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, and with reference to Figures 2 to 5, and in conjunction with other drawings, the embodiment of this application further provides a motor 100, the motor 100 including a motor rotor 10. Here, the motor rotor 10 in this embodiment is the same as the motor rotor 10 in the previous embodiment, and specifically, refer to the relevant description of the motor rotor 10 in the previous embodiment, and will not be described in detail here. Here, the descriptions of other components of the motor 100, such as the stator 20 and the rotating shaft 30, may refer to the relevant parts above, and will not be described in detail here again.

[0345] Here, the motor 100 may be an axial motor. If the motor rotor 10 mentioned in each of the above embodiments can be applied to a radial motor, then the motor 100 may be a radial motor. For example, if each mounting area 102 of the mounting frame 11 has a magnetic steel groove 1021, then 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, thereby allowing the motor rotor 10 to be applied to a radial motor, i.e., the motor 100 may be a radial motor.

[0346] The motor 100 according to the embodiments of this application employs the motor rotor 10 according to each embodiment described above, thereby enabling the mounting frame 11 to withstand relatively large stresses. Thus, the mounting frame 11 and the magnetic steel 12 have relatively high coupling reliability, meaning the motor rotor 10 has relatively high structural reliability, and the problem of the magnetic steel 12 flying out when the motor rotor 10 rotates can be improved. Therefore, the motor 100 can meet the requirements for high rotational speeds and has relatively high output efficiency.

[0347] Based on the above concept, refer to Figure 1 and link to other drawings. Embodiments of this application further provide a powertrain 1000, which includes a motor 100. The motor 100 in this embodiment is the same as the motor 100 in the previous embodiment, and specifically refer to the relevant description of the motor 100 in the previous embodiment, which will not be described in detail here. There may be other components in the powertrain 1000, such as a transmission, a controller 400, a battery 300, etc., and refer to the description of the relevant parts above, which will not be described in detail here again.

[0348] The powertrain 1000 according to the embodiment of this application employs the motor 100 according to each of the above embodiments, thereby enabling the motor 100 to meet the requirement for high rotational speed operation, having relatively high output efficiency, and furthermore, having relatively high power output efficiency of the powertrain 1000.

[0349] Based on the above concept, refer to Figure 1 and link to other drawings. Embodiments of this application further provide electric equipment, which includes a motor 100 or a powertrain 1000. Here, the motor 100 and powertrain 1000 in these embodiments are the same as the motor 100 and powertrain 1000 in previous embodiments, and specifically refer to the relevant descriptions of the motor 100 and powertrain 1000 in previous embodiments, which are not described in detail here. Here, specific schemes for power equipment may refer to the relevant parts above, which are not described in detail here again.

[0350] The electric equipment according to the embodiments of this application, by employing the motor 100 or powertrain 1000 according to each of the embodiments described above, can output power with relatively high efficiency and better meet the demands of use.

[0351] As one embodiment of this application, as shown in Figures 6 and 7, the motor rotor 10 includes a mounting frame 11 and magnetic steel 12, and one or both opposing surfaces of the mounting frame 11 in the axial direction Z are used to mount the magnetic steel 12. On one surface of the mounting frame 11 in the axial direction Z, the mounting frame 11 has a plurality of mounting regions 102 distributed sequentially along the radial direction Y, with a partition member 111 provided between two adjacent mounting regions 102, and the outermost mounting region 102 in the radial direction Y has a fence member 115. The magnetic steel 12 includes a plurality of blocks 121 distributed sequentially along the radial direction Y, each of which is provided on a mounting region 102 distributed sequentially along the radial direction Y, and each of the blocks 121 is installed on the surface of the mounting frame 11 in the axial direction Z. The partition member 111 is used to resist the centrifugal motion of the block 121 in the radial direction Y within its inner mounting area 102, and the fence member 115 is used to resist the block 121 in the outermost mounting area 102 in the radial direction Y. Here, the wall surface of the partition member 111 that faces the central axis L of the mounting frame 11 along the radial direction Y, and the wall surface of the fence member 115 that faces the central axis L of the mounting frame 11 along the radial direction Y, are both stopper walls 101.

[0352] As one embodiment of this application, as shown in Figure 10, the motor rotor 10 includes a mounting frame 11 and magnetic steel 12, and the mounting frame 11 is provided with a plurality of mounting regions 102 distributed sequentially along the radial direction Y. Each mounting region 102 has a magnetic steel groove 1021, and the groove wall of each magnetic steel groove 1021 toward the central axis L of the mounting frame 11 along the radial direction Y is a stopper wall 101. Two adjacent magnetic steel grooves 1021 are separated by a partition member 111 and distributed at intervals. The wall surface of the partition member 111 toward the central axis L of the mounting frame 11 along the radial direction Y is the stopper wall 101 of the magnetic steel groove 1021 on its inner side in the radial direction Y.

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

[0354] As one embodiment of this application, as shown in Figures 17 and 18, the motor rotor 10 includes a mounting frame 11 and magnetic steel 12, and the mounting frame 11 is provided with a plurality of mounting regions 102 distributed sequentially along the radial direction Y. Each mounting region 102 has a magnetic steel groove 1021, and the groove walls of each magnetic steel groove 1021 toward the central axis L of the mounting frame 11 along the radial direction Y are all stopper walls 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 surfaces of the first stepped structure 1101 toward the central axis L of the mounting frame 11 along the radial direction Y are stopper walls 101, and the plurality of stopper walls 101 in the first stepped structure 1101 are distributed sequentially along the axial direction Z. In the direction toward one side in the axial direction Z, the distance in the radial direction Y of the plurality of stopper walls 101 toward 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 are merely relatively preferred embodiments of this application and are not intended to limit it. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should all be included within the scope of protection of this application. [Explanation of symbols]

[0356] 1000-Powertrain, 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 stepped 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, 11 31d-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-base body, 114-stopper structure, 115-fence member, 12-magnetic steel, 1201-second stepped structure, 1202-third stepped structure, 121-block, 121a-first block, 121b-second block, 1 211 - Second boss, 1212 - Third boss, 13 - Protective member, L - Central axis, Z - Axial direction, Y - Radial direction, X - Circumferential direction, H1 - Radial outer circumferential size of the second magnetic steel groove, H2 - Radial inner circumferential size of the second magnetic steel groove, H3 - Radial outer circumferential size of the first magnetic steel groove, H4 - Radial distance of the first stopper wall relative to the central axis, H5 - Radial distance of the second stopper wall relative to the central axis, H6 - H7 - Radial distance of the third stopper wall with respect to its central axis; H8 - Radial distance of the fifth stopper wall with respect to its central axis; H9 - Radial distance of the seventh stopper wall with respect to its central axis; H10 - Radial outer circumferential size of the first block; H11 - Radial inner circumferential size of the second block.

Claims

1. Motor rotor (10), Mounting frame (11) and The mounting frame (11) includes a magnetic steel (12) which is attached to the mounting frame (11), Here, a stopper wall (101) is provided on the mounting frame (11), and the stopper wall (101) is used to resist the radial centrifugal motion of the magnetic steel (12). 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), A magnetic steel groove (1021) is provided in at least one of the mounting regions (102), and the stopper wall (101) is provided in the magnetic steel groove (1021), Multiple adjacent mounting regions (102) along the radial direction are provided with magnetic steel grooves (1021), two adjacent magnetic steel grooves (1021) communicate along the radial direction, and the stopper wall (101) is provided at the point where the two adjacent magnetic steel grooves (1021) communicate. The multiple magnetic steel grooves (1021) arranged radially form a first stepped structure (1101) in the axial direction, and the wall surface of the first stepped structure (1101) toward the central axis of the mounting frame (11) is the stopper wall (101). The mounting frame (11) includes a plurality of frame bodies (113), and the plurality of frame bodies (113) are connected in order to form the first stepped structure (1101). A motor rotor (10) wherein at least a portion of the frame body (113) is a first frame body (113a), and there are multiple first frame bodies (113a), and the multiple first frame bodies (113a) are arranged circumferentially from the inside to the outside along the radial direction, and the axial thickness gradually increases to form the first stepped structure (1101).

2. A motor rotor (10) according to claim 1, wherein a partition member (111) is provided between two adjacent mounting regions (102) along the radial direction, and the wall surface of the partition member (111) toward the central axis of the mounting frame (11) is the stopper wall (101).

3. A motor rotor (10) according to claim 2, wherein magnetic steel grooves (1021) are provided in a plurality of adjacent mounting regions (102) along the radial direction, a stopper wall (101) is provided in the magnetic steel groove (1021), a partition member (111) is provided between two adjacent magnetic steel grooves (1021), and the wall surface of the partition member (111) toward the central axis of the mounting frame (11) is the stopper wall (101) of the magnetic steel groove (1021) radially inward of the partition member (111).

4. The motor rotor (10) according to claim 1, wherein each of the mounting regions (102) is provided with the stopper wall (101), and the stopper walls (101) of the multiple mounting regions (101) are distributed at intervals along the radial direction.

5. The motor rotor (10) according to claim 1, wherein the outer shape of the magnetic steel (12) is fitted to the stopper wall (101) of the magnetic steel groove (1021) and installed accordingly.

6. A first boss (112) is provided on the circumferential side wall of the communication point between two adjacent magnetic steel grooves (1021), and the wall surface of the first boss (112) toward the central axis of the mounting frame (11) is the stopper wall (101), as described in claim 1.

7. The magnetic steel (12) has a single-piece structure and a second boss (1211) that is fitted to the stopper wall (101). Alternatively, the motor rotor (10) according to claim 6, wherein the magnetic steel (12) comprises a plurality of blocks (121), at least some of the blocks (121) are arranged radially, and of two radially adjacent blocks (121), at least one side in the circumferential direction of the radially inner block (121) forms a third boss (1212) that is fitted to a stopper wall (101) beyond the radially outer block (121) along the circumferential direction.

8. The motor rotor (10) according to claim 6, wherein the two adjacent magnetic steel grooves (1021) are a first magnetic steel groove (1021a) and a second magnetic steel groove (1021b) located radially outside the first magnetic steel groove (1021a), the circumferential size of the radially outside the second magnetic steel groove (1021b) is larger than the circumferential size of the radially inside the second magnetic steel groove (1021b), and the opposing sides of the radially outside the first magnetic steel groove (1021a) in the circumferential direction extend beyond the radially inside and outside of the second magnetic steel groove (1021b) to form the first boss (112).

9. The motor rotor (10) according to claim 1, wherein the radial distance of at least a portion of the stopper wall (101) with respect to the central axis of the mounting frame (11) is set to gradually increase in the axial direction.

10. The motor rotor (10) according to claim 1, wherein the radial distance of at least one stopper wall (101) with respect to the central axis of the mounting frame (11) is greater than or less than the radial distance of two adjacent stopper walls (101) with respect to the central axis of the mounting frame (11) along the axial direction.

11. The motor rotor (10) according to claim 1, wherein the mounting frame (11) further includes a base (113g), the first stepped structure (1101) is provided on the base (113g), and the radial distance of at least one stopper wall (101) with respect to the central axis of the mounting frame (11) is greater than the radial distance of the stopper wall (101) away from the base (113g) along the axial direction with respect to the central axis of the mounting frame (11).

12. The magnetic steel (12) has an integral structure and forms a second stepped structure (1201) that is installed to fit the stopper wall (101). Alternatively, the motor rotor (10) according to claim 1, wherein the magnetic steel (12) comprises a plurality of blocks (121), at least some of the blocks (121) are arranged radially, and at least one side in the axial direction of the radially inner blocks (121) of the radially adjacent plurality of blocks (121) forms a third stepped structure (1202) that is installed in conformity with the stopper wall (101) beyond the radially outer blocks (121) in the axial direction.

13. The motor rotor (10) according to claim 1, wherein at least a portion of the frame body (113) is a second frame body (113b), and the second frame body (113b) and the first frame body (113a) are installed sequentially along the axial direction to form the first stepped structure (1101) with the first frame body (113a).

14. The motor rotor (10) according to claim 1, wherein at least some of the frame bodies (113) are annular third frame bodies (113c), the number of third frame bodies (113c) is plurality, the plurality of third frame bodies (113c) are arranged sequentially along the axial direction, and the inner diameters of at least two adjacent third frame bodies (113c) are different to form the first stepped structure (1101).

15. The motor rotor (10) according to claim 14, wherein at least a portion of the frame body (113) is a fourth frame body (113d), 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 sequentially along the axial direction, and the annular member (1132d) is circumferentially provided on the radially outer side of the plurality of third frame bodies (113c).

16. The motor rotor (10) according to claim 1, wherein the frame body (113) has an integrated structure or a divided connection structure.

17. The motor rotor (10) according to claim 5, wherein the mounting frame (11) includes a fifth frame body (113e) distributed sequentially along a plurality of axial directions, the fifth frame body (113e) is provided with the magnetic steel groove (1021), and the stopper walls (101) of the magnetic steel groove (1021) of at least some adjacent fifth frame body (113e) are installed offset along the radial direction.

18. The motor rotor (10) according to claim 1, wherein the circumferential size of each magnetic steel groove (1021) is set to gradually increase along the radial direction and outward.

19. The motor rotor (10) according to claim 1, wherein the magnetic steel (12) comprises a plurality of blocks (121), the plurality of blocks (121) being distributed sequentially along the radial direction and / or the plurality of blocks (121) being distributed sequentially along the axial direction and / or the plurality of blocks (121) being distributed sequentially along the circumferential direction.

20. The blocks (121) adjacent to each other along the radial direction are arranged or bonded at intervals, The motor rotor (10) according to claim 19, wherein adjacent blocks (121) along the circumferential direction are spaced apart or bonded together.

21. The motor rotor (10) according to claim 1, wherein the magnetic steel (12) is installed on the axial surface of the mounting frame (11), and the mounting frame (11) is provided with the stopper wall (101) located radially outside the magnetic steel (12).

22. The motor rotor (10) according to claim 1, wherein the mounting frame (11) is made of a magnetic permeable material, or the mounting frame (11) is made of a non-magnetic permeable material.

23. The motor rotor (10) according to claim 1, wherein a plurality of magnetic steels (12) are installed, the plurality of magnetic steels (12) are distributed sequentially along the circumferential direction on the mounting frame (11), the mounting frame (11) further includes a plurality of stopper structures (114) distributed sequentially along the circumferential direction, and each magnetic steel (12) is stopped between two adjacent stopper structures (114) along the circumferential direction.

24. The motor rotor (10) according to claim 1, wherein the magnetic steel (12) is fixedly connected to the mounting frame (11).

25. The motor rotor (10) according to claim 24, wherein the magnetic steel (12) is interlocked 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).

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

27. The motor rotor (10) according to claim 26, wherein the protective member (13) is a magnetic permeable material member.

28. The motor rotor (10) according to claim 26, wherein a positioning groove is provided in the protective member (13), and at least a portion of the magnetic steel (12) is provided within the positioning groove.

29. The motor rotor (10) according to claim 26, wherein a plurality of mounting frames (11) are installed and distributed sequentially along the axial direction, and the protective member (13) is provided between two adjacent mounting frames (11).

30. Multiple protective members (13) are installed and distributed sequentially along the axial direction. The motor rotor (10) according to claim 26, wherein a plurality of mounting frames (11) are installed between two adjacent protective members (13) and / or a single mounting frame (11) is provided between two adjacent protective members (13), and the magnetic steel (12) is exposed on both sides of the mounting frame (11) along the axial direction.

31. A motor (100), comprising a motor rotor (10) as described in claim 1.

32. A powertrain (1000) comprising a motor (100) according to claim 31.

33. An electric device comprising a motor (100) according to claim 31 or a powertrain (1000) according to claim 32.

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