Motor rotor and assembling tool therefor, and motor

Abstract

Provided is a motor rotor. A rotor body (1) of the motor rotor is provided with a plurality of recesses (1h), and a first recess part (1h1) and a second recess part (1h2) of each recess (1h) are communicated by means of a communicating part (1h3). A first magnet (2) is mounted in each first recess part (1h1), and one end wall of the first magnet (2) abuts against the rotor body (1). A second magnet (3) is mounted in each second recess part (1h2), and one end wall of the second magnet (3) abuts against the rotor body (1). An elastic support (4) is mounted in each communication part (1h3) and applies an elastic force to the first magnet (2) and the second magnet (3), so that the first magnet (2) and the second magnet (3) are fixed relative to the rotor body (1). In this way, the magnets are fixed relative to the rotor body by using a relatively simple structure, thereby simplifying the production and assembling processes of the motor rotor and reducing the corresponding costs. Also provided are a motor comprising the motor rotor and an assembling tool for the motor rotor. The assembling tool improves the production efficiency and is beneficial to large-scale industrial production.

Description

Motor rotor, assembly tool thereof, and motor Technical Field

[0001] The present application relates to the field of motors, and in particular to a motor rotor and an assembly tool thereof, as well as a motor comprising the motor rotor. Background Art

[0002] In the electric drive system of existing vehicles, a motor (such as a permanent magnet synchronous motor) is usually used to drive the vehicle, which requires the motor to have a high speed so that the vehicle has better performance. However, as the speed of the motor increases, the motor rotor will be subjected to a very large centrifugal force, so it is necessary to ensure that the magnets (such as magnetic steel) in the motor rotor and the rotor body (such as the rotor core) are well fixed. Usually, in the prior art, the slots of the rotor body are filled with adhesive to fix the magnets, or part of the structure of the rotor body is deformed to squeeze and fix the magnets. However, these methods require complex processes and equipment, making the production and assembly process of the motor rotor complicated and costly.

[0003] Summary of the Invention

[0004] This application is made in light of the state of the prior art described above. One object of this application is to provide a motor rotor that can secure the magnets relative to the rotor body with a relatively simple structure, thereby simplifying the production and assembly process of the motor rotor and reducing the corresponding costs. Another object of this application is to provide an assembly tool for the motor rotor of this application, which can simplify the assembly process of the motor rotor and facilitate large-scale industrial production. Yet another object of this application is to provide a motor including the above-mentioned motor rotor.

[0005] In order to achieve the above objectives, the present application may adopt the following technical solutions.

[0006] The present application provides a motor rotor as follows, comprising:

[0007] a rotor body formed in an annular shape as a whole, the rotor body being formed with a plurality of slots spaced apart in a circumferential direction thereof, each of the slots including a first slot portion, a second slot portion, and a communication portion, the first slot portion and the second slot portion being communicated with each other through the communication portion;

[0008] a first magnet installed in the first groove, wherein one end wall of the first magnet abuts against the rotor body;

[0009] a second magnet installed in the second groove portion, with one end wall of the second magnet abutting against the rotor body; and

[0010] An elastic support member is installed in the connecting portion, and the elastic support member simultaneously abuts against the other end wall of the first magnet and the other end wall of the second magnet, so that the elastic support member applies an elastic force to the first magnet and the second magnet, thereby fixing the first magnet and the second magnet relative to the rotor body.

[0011] In an optional solution, the elastic support member includes a first elastic support portion, a second elastic support portion and a connecting portion connected to each other, the first elastic support portion and the second elastic support portion are connected to the connecting portion,

[0012] The first elastic support portion abuts against the other end wall of the first magnet to be in an elastically deformed state, the second elastic support portion abuts against the other end wall of the second magnet to be in an elastically deformed state, and the connecting portion abuts against the rotor body.

[0013] In another optional solution, the first elastic supporting portion, the second elastic supporting portion and the connecting portion are formed by the same sheet material.

[0014] The connecting portion is formed to match the shape of the supporting wall of the communicating portion, and the first elastic supporting portion and the second elastic supporting portion are bent or curved relative to the connecting portion.

[0015] In another optional solution, the first elastic support portion and the second elastic support portion are both formed into a spiral structure; or

[0016] The first elastic support portion includes a first elastic arm that abuts against the first magnet and a first support arm connected to the connecting portion, and the first elastic arm and the first support arm form a U-shaped structure, and the second elastic support portion includes a second elastic arm that abuts against the second magnet and a second support arm connected to the connecting portion, and the second elastic arm and the second support arm form a U-shaped structure.

[0017] In another optional solution, the first elastic support portion further includes a first limiting arm, the first limiting arm extending from the first elastic arm and extending into between a side wall of the first magnet and the rotor body, and the other side wall of the first magnet abuts against the rotor body; and

[0018] The second elastic support portion further includes a second limiting arm, which extends from the second elastic arm and extends between a side wall of the second magnet and the rotor body, and the other side wall of the second magnet abuts against the rotor body.

[0019] In another optional solution, the cross-sections of the elastic support member perpendicular to the axial direction taken at different positions on the axial direction of the rotor body are the same, thereby the elastic support member defines a channel penetrating along the axial direction for the cooling fluid to flow through.

[0020] In another optional solution, a plurality of first magnets are stacked and arranged along the axial direction in each first slot, and / or

[0021] A plurality of the second magnets are stacked and arranged in each of the second groove portions along the axial direction.

[0022] In another optional solution, each of the slots further includes a first magnetic isolation slot portion and a second magnetic isolation slot portion.

[0023] The first magnetic isolation groove is connected to the first groove, the rotor body is formed with a first limiting protrusion protruding into the first magnetic isolation groove, one end wall of the first magnet abuts against the first limiting protrusion, and

[0024] The second magnetic isolation groove is communicated with the second groove. The rotor body is formed with a second limiting protrusion protruding into the second magnetic isolation groove. One end wall of the second magnet abuts against the second limiting protrusion.

[0025] The present application also provides a motor as follows, which includes the motor rotor described in any one of the above technical solutions.

[0026] The present application also provides one or more motor rotor assembly tools, which include:

[0027] an annular body extending along the circumferential direction; and

[0028] A plurality of inserting parts are arranged at intervals along the circumference, each of the inserting parts includes a first columnar clamp and a second columnar clamp extending toward one side of the axial direction, the first columnar clamp can be inserted into the spiral structure formed by the first elastic support part and the second columnar clamp can be inserted into the spiral structure formed by the second elastic support part, so that the elastic support member is retained by the corresponding inserting part.

[0029] By adopting the above technical solution, the present application provides a motor rotor and a motor including the same. In the motor rotor of the present application, the rotor body is formed as a whole into an annular shape and is formed with a plurality of slots spaced apart in the circumferential direction of the rotor body. Each slot includes a first slot portion, a second slot portion, and a connecting portion, with the first and second slot portions connected by the connecting portion. A first magnet is mounted in the first slot portion, with one end wall of the first magnet abutting the rotor body, and a second magnet is mounted in the second slot portion, with one end wall of the second magnet abutting the rotor body. Furthermore, an elastic support member is mounted in the connecting portion, which abuts the other end wall of the first magnet and the other end wall of the second magnet simultaneously, so that the elastic support member applies an elastic force to the first and second magnets. In this way, the elastic support member cooperates with the rotor body to effectively secure the first and second magnets in the slots. This allows the magnets to be fixed relative to the rotor body with a relatively simple structure, thereby simplifying the production and assembly process of the motor rotor and reducing the corresponding costs. Furthermore, a motor including the above motor rotor achieves the same effect.

[0030] The present application also provides a motor rotor assembly tool that utilizes multiple insertion portions to simultaneously hold multiple elastic support members, thereby enabling the assembly of multiple elastic support members in place at once. This simplifies the motor rotor assembly process, improves production efficiency, and facilitates large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1A is a perspective schematic diagram showing a motor rotor according to a first embodiment of the present application.

[0032] FIG. 1B is a schematic front view showing the motor rotor in FIG. 1A .

[0033] FIG. 1C is an enlarged schematic diagram showing a partial structure of the motor rotor in FIG. 1A .

[0034] FIG. 2A is a schematic front view showing a rotor body of the motor rotor in FIG. 1A .

[0035] FIG. 2B is an enlarged schematic diagram showing a partial structure of the rotor body in FIG. 2A .

[0036] FIG. 3 is a perspective view showing a magnet installed in one slot of the motor rotor in FIG. 1A .

[0037] FIG. 4A is a perspective schematic diagram showing an elastic support member of the motor rotor in FIG. 1A .

[0038] FIG. 4B is a front schematic view showing the elastic supporting member in FIG. 4A .

[0039] FIG. 5A is a perspective view showing an assembly tool for assembling the elastic support member of the motor rotor in FIG. 1A .

[0040] FIG. 5B is a schematic diagram for explaining a process of assembling the elastic supporting member using the assembly tool in FIG. 5A .

[0041] FIG6A is a perspective schematic diagram showing a motor rotor according to a second embodiment of the present application.

[0042] FIG. 6B is a schematic front view showing the motor rotor in FIG. 6A .

[0043] FIG. 6C is an enlarged schematic diagram showing a partial structure of the motor rotor in FIG. 6A .

[0044] FIG. 7A is a perspective schematic diagram showing an elastic support member of the motor rotor in FIG. 6A .

[0045] FIG. 7B is a front schematic view showing the elastic supporting member in FIG. 7A .

[0046] Explanation of Reference Numerals 1 rotor body; 1h slot; 1h1 first slot portion; 1h2 second slot portion; 1h3 connecting portion; 1h4 first magnetic isolation slot portion; 1h5 second magnetic isolation slot portion; 11 first limiting protrusion; 12 second limiting protrusion; 1w supporting wall; 1w1 side wall of the first slot portion; 1w2 side wall of the second slot portion; 2 first magnet; 3 second magnet; 4 elastic supporting member; 41 first elastic supporting portion; 4h1 first insertion hole; 411 first elastic arm; 412 first supporting arm; 413 first limiting arm; 42 second elastic supporting portion; 4h2 second insertion hole; 421 second elastic arm; 422 second supporting arm; 423 second limiting arm; 43 connecting portion; 5 assembly tool; 51 annular body; 52 inserting portion; 521 first columnar clamp; 522 second columnar clamp; S is the symmetry line; A is the axial direction; R is the radial direction; C is the circumferential direction; L1 is the length direction of the first groove portion; W1 is the width direction of the first groove portion; L2 is the length direction of the second groove portion; W2 is the width direction of the second groove portion. DETAILED DESCRIPTION

[0047] The specific embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0048] In this application, unless otherwise specified, "axial," "radial," and "circumferential" refer to the axial, radial, and circumferential directions of the motor rotor (rotor body), respectively. "Radially outer" refers to the side radially away from the central axis of the motor rotor, and "radially inner" refers to the side radially closer to the central axis of the motor rotor.

[0049] In this application, unless otherwise specified, the terms "length," "width," and "depth" refer to the length, width, and depth of the slot portion of the rotor body for mounting magnets, with the depth direction aligning with the axial direction of the rotor body. Furthermore, the "sidewalls" of the slot portion refer to the sidewalls on both sides in the width direction.

[0050] The following describes a motor rotor according to a first embodiment of the present application in conjunction with the accompanying drawings.

[0051] (Motor rotor according to the first embodiment of the present application)

[0052] As shown in Figures 1A to 1C, the motor rotor according to the first embodiment of the present application includes an assembled rotor body 1, a plurality of first magnets 2, a plurality of second magnets 3, and a plurality of elastic support members 4. The first magnets 2 and the second magnets 3 are respectively received and installed in the first groove portion 1h1 and the second groove portion 1h2 of the groove 1h of the rotor body 1. The elastic support members 4 are received and installed in the connecting portion 1h3 of the groove 1h of the rotor body 1, and are used to support and cooperate with the rotor body 1 to fix the first magnets 2 and the second magnets 3.

[0053] In this embodiment, as shown in Figures 1A to 1C and Figures 2A and 2B, the rotor body 1 is formed as a whole in an annular shape. The rotor body 1 can be formed by stacking a plurality of sheet-like laminates having the same structure in the axial direction A. The sheet-like laminates can be sheets formed by the same stamping process. A typical example of such sheets is silicon steel sheets, but sheets made of other conductive materials can also be used.

[0054] To accommodate and mount the first and second magnets 2 and 3, the rotor body 1 is formed with a plurality of slots 1h extending through the rotor body 1 along the axial direction A. Specifically, as shown in Figures 1A, 1B, and 2A, the slots 1h are evenly spaced and arranged in the circumferential direction C. Furthermore, as shown in Figures 1C and 2B, each slot 1h comprises a first slot portion 1h1, a second slot portion 1h2, and a connecting portion 1h3. The first slot portion 1h1 accommodates and mounts one or more first magnets 2. The first slot portion 1h1 is configured to have a rectangular parallelepiped shape, with a length direction L1 and a width direction W1 tilted relative to the radial direction R. The second slot portion 1h2 accommodates and mounts one or more second magnets 3. The second slot portion 1h2 is configured to have a rectangular parallelepiped shape, with a length direction L2 and a width direction W2 tilted relative to the radial direction R. The depth directions of both the first and second slot portions 1h1 and 1h2 coincide with the axial direction A. Furthermore, the first and second slot portions 1h1 and 1h2 are connected by a connecting portion 1h3. Thus, each slot 1h forms a V-shaped structure, and the angle formed by the extension direction (lengthwise L1) of the first slot portion 1h1 and the extension direction (lengthwise L2) of the second slot portion 1h2 can be acute, right, or obtuse. The opening of the V-shaped structure can face radially outward of the rotor body 1, while the base (or tip) of the V-shaped structure can face radially inward or toward the center of the rotor body 1. That is, for each slot 1h, the first and second slot portions 1h1, 1h2 extend radially inward while approaching each other, and a common connecting portion 1h3 is located radially inward of the first and second slot portions 1h1, 1h2. Furthermore, each slot 1h also includes a first magnetic isolation slot portion 1h4 and a second magnetic isolation slot portion 1h5. The first magnetic isolation slot portion 1h4 is located radially outward of and connected to the first slot portion 1h1, and the second magnetic isolation slot portion 1h5 is located radially outward of and connected to the second slot portion 1h2. The first and second magnetic isolation slots 1h4 and 1h5 are sealed on the outer circumference of the rotor body 1, forming magnetic isolation bridges that reduce magnetic flux leakage, thereby improving the power density of the motor incorporating this motor rotor. As shown in Figures 1C and 2B, when viewed along the axial direction A, each slot 1h has a symmetry line S extending along a radial direction R of the rotor body 1, resulting in each slot 1h being symmetrical with respect to this symmetry line S. In practice, the first and second magnets 2 and 3 are also symmetrically arranged with respect to this symmetry line S, and the elastic support member 4 is also symmetrically arranged with respect to this symmetry line S.

[0055] Furthermore, to cooperate with the elastic support member 4 to secure the first magnet 2 and the second magnet 3, as shown in Figures 1C and 2B, the rotor body 1 is formed with a first limiting protrusion 11 that protrudes into the first magnetic isolation groove 1h4. The first limiting protrusion 11 abuts against a radially outer end wall of the first magnet 2. Furthermore, the rotor body 1 is formed with a second limiting protrusion 12 that protrudes into the second magnetic isolation groove 1h5. The second limiting protrusion 12 abuts against a radially outer end wall of the second magnet 3.

[0056] In this embodiment, the first magnet 2 and the second magnet 3 can both be made of magnetic steel. As shown in Figures 1A to 1C and Figure 3, one or more first magnets 2 are housed and installed in the first slot portion 1h1 of each slot 1h of the rotor body 1, and the multiple first magnets 2 in each first slot portion 1h1 are stacked along the axial direction A. When observed along the axial direction A, each first magnet 2 has an outer shape that matches the contour shape of the first slot portion 1h1, that is, the length direction and width direction of the first magnet 2 are respectively consistent with the length direction L1 and width direction W1 of the first slot portion 1h1. One end wall of each first magnet 2 located on the radial outside abuts the first limiting protrusion 11, and the other end wall of each first magnet 2 located on the radial inside abuts the elastic support member 4. Each first magnet 2 can be made to abut against the side walls 1w1 of the first slot portion 1h1 on both sides of the width direction W1 by means of interference fit. Similarly, one or more second magnets 3 are housed and mounted in the second slot portion 1h2 of each slot 1h of the rotor body 1. The multiple second magnets 3 in each second slot portion 1h2 are stacked along the axial direction A. When viewed along the axial direction A, each second magnet 3 has a shape that matches the contour of the second slot portion 1h2. That is, the length and width of the second magnet 3 coincide with the length L2 and width W2 of the second slot portion 1h2, respectively. The radially outer end wall of each second magnet 3 abuts the second retaining protrusion 12, while the radially inner end wall of each second magnet 3 abuts the elastic support member 4. An interference fit allows each second magnet 3 to abut against the sidewalls 1w2 of the second slot portion 1h2 on either side in the width direction W1. To prevent interference and other phenomena, the axial end faces of all first magnets 2 housed and mounted in the first slot portion 1h1 and all second magnets 3 housed and mounted in the second slot portion 1h2 are flush with the axial end face of the rotor body 1 in which they are mounted. By forming the slots 1 h arranged as above and installing the corresponding first magnets 2 and second magnets 3 , not only the NVH performance of the motor rotor can be improved, but also the magnetic flux from the motor rotor to the motor stator can be increased.

[0057] In this embodiment, as shown in Figures 1A to 1C and Figures 4A and 4B, the elastic support member 4 is received and mounted in the connecting portion 1h3 of the slot 1h of the rotor body 1. The elastic support member 4 includes a first elastic support portion 41, a second elastic support portion 42, and a connecting portion 43, which are connected to each other. The first elastic support portion 41 and the second elastic support portion 42 are connected by the connecting portion 43. The first elastic support portion 41 abuts against the other end wall of the first magnet 2 to be in an elastically deformed state, the second elastic support portion 42 abuts against the other end wall of the second magnet 3 to be in an elastically deformed state, and the connecting portion 43 abuts against the rotor body 1. As a result, the elastic support member 4 simultaneously abuts against the other end wall of the first magnet 2 and the other end wall of the second magnet 3, and the elastic support member 4 simultaneously applies elastic force to the first magnet 2 and the second magnet 3, causing the first magnet 2 to press against the first limiting protrusion 11 and the second magnet 3 to press against the second limiting protrusion 12. In this way, the first magnet 2 can be fixed relative to the rotor body 1 by using the elastic support member 4 and the first limiting protrusion 11 of the rotor body 1, and the second magnet 3 can be fixed relative to the rotor body 1 by using the elastic support member 4 and the second limiting protrusion 12 of the rotor body 1.

[0058] Furthermore, as shown in Figures 4A and 4B, the first elastic support portion 41, the second elastic support portion 42, and the connecting portion 43 can be formed from the same sheet of material, thereby enabling the connecting portion 43 to be formed to match the shape of the support wall (the wall located radially inward, see Figure 2B) 1w of the connecting portion 1h3, and allowing the first elastic support portion 41 and the second elastic support portion 42 to bend or bend relative to the connecting portion 43. Specifically, in this embodiment, the first elastic support portion 41 is formed into a spiral structure, which not only allows the first elastic support portion 41 to have the ability to elastically deform, but also allows the first elastic support portion 41 to surround and form a first insertion hole 4h1 for cooperation with the assembly tool 5. The second elastic support portion 42 is also formed into a spiral structure, which not only allows the second elastic support portion 42 to have the ability to elastically deform, but also allows the second elastic support portion 42 to surround and form a second insertion hole 4h2 for cooperation with the assembly tool 5.

[0059] 4A and 4B , in at least one example, the cross-sections of the elastic support member 4 perpendicular to the axial direction A taken at different positions along the axial direction A (see FIG. 4 ) can all be identical. Thus, the elastic support member 4 defines a channel extending along the axial direction A, thereby not affecting the circulation of the cooling fluid. In one example, the elastic support member 4 can be formed by bending or curving a metal sheet.

[0060] By adopting this solution, the elastic support member 4 cooperates with the rotor body 1 to effectively secure the first magnet 2 and the second magnet 3 within the slot 1h. This allows the magnets 2 and 3 to be secured relative to the rotor body 1 using a relatively simple structure, thereby simplifying the production and assembly of the motor rotor and reducing the corresponding costs. Furthermore, the connecting portion 1h3 and the magnetic isolation slots 1h4 and 1h5 can be used as a flow path for the cooling fluid, thereby simplifying the structure of the motor rotor's cooling flow path.

[0061] The following describes an assembly tool 5 for the motor rotor.

[0062] In this embodiment, as shown in Figures 5A and 5B, the assembly tool 5 includes an annular body 51 and an inserting portion 52 fixed to each other. The annular body 51 can extend continuously along the entire circumference C. A plurality of inserting portions 52 are evenly arranged at intervals along the circumferential direction C, and each inserting portion 52 extends from the annular body 51 toward one axial side and includes a pair of first columnar clamps 521 and second columnar clamps 522 extending toward one axial side, and each pair of first columnar clamps 521 and second columnar clamps 522 can hold an elastic support member 4. Furthermore, the number of the plurality of inserting portions 52 can be 1 times, 1 / 2 times, 1 / 3 times, etc., the number of the elastic support members 4 of the motor rotor, so that all the elastic support members 4 can be assembled in place at one time, or in two or three times.

[0063] When assembly is required, as shown in FIG5B , the first cylindrical clamp 521 is inserted into the first insertion hole 4h1 formed by the spiral structure of the first elastic support portion 41, and the second cylindrical clamp 522 is inserted into the second insertion hole 4h2 formed by the spiral structure of the second elastic support portion 42, so that the elastic support member 4 is held by the corresponding insertion portion 52 in a state of elastic deformation (the first elastic support portion 41 and the second elastic support portion 42 are close to each other). While holding the elastic support member 4, the assembly tool 5 can be moved to a position where the elastic support member 4 is installed in the connecting portion 1h3 of the groove 1h. Then, by pulling out the first cylindrical clamp 521 and the second cylindrical clamp 522 (at this time, a tool or tooling can be used to prevent axial movement of the elastic support member 4), the elastic support member 4 is installed in place and applies an elastic force to the first magnet 2 and the second magnet 3. In this way, the assembly process of the motor rotor can be simplified, which is conducive to improving assembly efficiency and achieving large-scale industrial production.

[0064] A motor rotor according to a second embodiment of the present application will be described below.

[0065] (Motor rotor according to the second embodiment of the present application)

[0066] The structure of the motor rotor according to the second embodiment of the present application is substantially the same as that of the motor rotor according to the first embodiment of the present application, and the differences between the two are mainly described below.

[0067] In this embodiment, as shown in Figures 6A to 6C, the elastic support member 4 includes a first elastic support portion 41, a second elastic support portion 42, and a connecting portion 43 fixed to each other. The first elastic support portion 41 includes a first elastic arm 411, a first support arm 412, and a first limiting arm 413. The first elastic arm 411 is integrally abutted against the radially inner end wall of the first magnet 2 in a surface-contact manner. One end of the first support arm 412 is connected to the first elastic arm 411 and the other end is connected to the connecting portion 43. As a result, the first elastic arm 411 and the first support arm 412 form a U-shaped structure, which enables the first elastic support portion 41 to be elastically deformable. Furthermore, the first limiting arm 413 extends from the first elastic arm 411 and extends between a side wall of the first magnet 2 and the rotor body 1, so that the first magnet 2 and the rotor body 1 sandwich the first limiting arm 413. In other words, the first limiting arm 413 effectively compensates for the gap between the side wall of the first magnet 2 and the side wall 1w1 of the first groove portion 1h1. Furthermore, the other side wall of the first magnet 2 abuts against the other side wall 1w1 of the first groove portion 1h1. As a result, the first magnet 2 can be more effectively limited in the width direction W1 of the first groove portion 1h1. The second elastic arm 421 abuts against the radially inner end wall of the second magnet 3 in a surface-contact manner. One end of the second support arm 422 is connected to the second elastic arm 421 and the other end is connected to the connecting portion 43, thereby forming a U-shaped structure with the second elastic arm 421 and the second support arm 422, so that the second elastic support portion 42 has the ability to elastically deform. Furthermore, the second limiting arm 423 extends from the second elastic arm 421 and extends between a side wall of the second magnet 3 and the rotor body 1, so that the second magnet 3 and the rotor body 1 clamp the second limiting arm 423. In other words, the second limiting arm 423 actually compensates for the gap between the side wall of the second magnet 3 and the side wall 1w2 of the second groove portion 1h2. Furthermore, the other side wall of the second magnet 3 abuts against the other side wall 1w2 of the second groove 1h2. This effectively limits the second magnet 3 in the width direction W1 of the second groove 1h2. While the structure of the elastic support member 4 is different compared to the first embodiment, the same or even better limiting effect is achieved.

[0068] It can be understood that in a variation of this embodiment, the elastic support member 4 may not have the first limiting arm 413 and the second limiting arm 423 .

[0069] It should be understood that the above embodiments are merely illustrative and are not intended to limit the present application. Those skilled in the art may, based on the teachings of this application, make various modifications and alterations to the above embodiments without departing from the scope of this application. Further, the following supplementary explanations are provided.

[0070] i. This application also provides a motor comprising the motor rotor and the motor stator according to this application. The motor stator may be located radially outward from the motor rotor and separated from the motor rotor by a predetermined gap. In an optional solution, the motor may further include a rotor support or a rotor hub. The motor rotor may be fixed to the rotor support or the rotor hub from the radial outward, and the rotor support may be mounted to the rotor shaft from the radial outward.

[0071] ii. It is understood that the motor rotor according to the present application may include only one rotor body 1 or may include multiple rotor bodies 1 stacked in the axial direction A. The multiple rotor bodies 1 may have the same configuration and be coaxially arranged, thereby forming a straight slot motor rotor or a skew slot motor rotor.

[0072] iii. It will be appreciated that, for each slot 1h, the angle formed by the extension direction (length direction L1) of the first slot portion 1h1 and the extension direction (length direction L2) of the second slot portion 1h2 can be set as needed. Furthermore, in the motor rotor of the present application, the number of slots 1h can be adjusted as needed.

Claims

1. A motor rotor, comprising: A rotor body (1) formed in an annular shape as a whole, the rotor body (1) being formed with a plurality of grooves (1h) arranged at intervals in a circumferential direction (C) thereof, each of the grooves (1h) comprising a first groove portion (1h1), a second groove portion (1h2) and a communication portion (1h3), the first groove portion (1h1) and the second groove portion (1h2) being communicated with each other through the communication portion (1h3); A first magnet (2) installed in the first groove (1h1), one end wall of the first magnet (2) abutting against the rotor body (1); a second magnet (3) installed in the second groove portion (1h2), one end wall of the second magnet (3) abutting against the rotor body (1); and An elastic support member (4) is installed in the connecting portion (1h3), and the elastic support member (4) is simultaneously pressed against the other end wall of the first magnet (2) and the other end wall of the second magnet (3), so that the elastic support member (4) applies an elastic force to the first magnet (2) and the second magnet (3), thereby fixing the first magnet (2) and the second magnet (3) relative to the rotor body (1).

2. The motor rotor according to claim 1, characterized in that: The elastic support member (4) comprises a first elastic support portion (41), a second elastic support portion (42) and a connecting portion (43) which are connected to each other, wherein the first elastic support portion (41) and the second elastic support portion (42) are connected to the connecting portion (43). The first elastic support portion (41) abuts against the other end wall of the first magnet (2) to be in an elastically deformed state, the second elastic support portion (42) abuts against the other end wall of the second magnet (3) to be in an elastically deformed state, and the connecting portion (43) abuts against the rotor body (1).

3. The motor rotor according to claim 2, characterized in that: The first elastic supporting portion (41), the second elastic supporting portion (42) and the connecting portion (43) are formed by the same sheet material. The connecting portion (43) is formed to match the shape of the supporting wall (1w) of the connecting portion (1h3). The first elastic support portion (41) and the second elastic support portion (42) are bent or curved relative to the connecting portion (43).

4. The motor rotor according to claim 3, characterized in that: The first elastic support portion (41) and the second elastic support portion (42) are both formed into a spiral structure; or The first elastic support portion (41) includes a first elastic arm (411) abutting against the first magnet (2) and a first support arm (412) connected to the connecting portion (43), and the first elastic arm (411) and the first support arm (412) form a U-shaped structure, and the second elastic support portion (42) includes a second elastic arm (421) abutting against the second magnet (3) and a second support arm (422) connected to the connecting portion (43), and the second elastic arm (421) and the second support arm (422) form a U-shaped structure.

5. The motor rotor according to claim 4, characterized in that: The first elastic support portion (41) further comprises a first limiting arm (413), the first limiting arm (413) extending from the first elastic arm (411) and extending into between a side wall of the first magnet (2) and the rotor body (1), and the other side wall of the first magnet (2) abuts against the rotor body (1); and The second elastic support portion (42) further comprises a second limiting arm (423), the second limiting arm (423) extending from the second elastic arm (421) and extending into between one side wall of the second magnet (3) and the rotor body (1), and the other side wall of the second magnet (3) abuts against the rotor body (1).

6. The motor rotor according to any one of claims 1 to 5, characterized in that: The cross sections of the elastic support member (4) perpendicular to the axial direction (A) taken at different positions on the axial direction (A) of the rotor body are all the same, so that the elastic support member (4) defines a channel that passes through along the axial direction (A) for the cooling fluid to flow through.

7. The motor rotor according to claim 6, characterized in that: A plurality of the first magnets (2) are stacked and arranged along the axial direction (A) in each of the first grooves (1h1), and / or A plurality of second magnets (3) are stacked and arranged in each of the second groove portions (1h2) along the axial direction (A).

8. The motor rotor according to any one of claims 1 to 5, characterized in that: Each of the grooves (1h) further comprises a first magnetic isolation groove portion (1h4) and a second magnetic isolation groove portion (1h5), The first magnetic isolation groove (1h4) is connected to the first groove (1h1), the rotor body (1) is formed with a first limiting protrusion (11) protruding into the first magnetic isolation groove (1h4), one end wall of the first magnet (2) abuts against the first limiting protrusion (11), and The second magnetic isolation groove (1h5) is connected to the second groove (1h2), and the rotor body (1) is formed with a second limiting protrusion (12) protruding into the second magnetic isolation groove (1h5), and one end wall of the second magnet (3) abuts against the second limiting protrusion (12).

9. An electric motor, comprising the electric motor rotor according to any one of claims 1 to 8.

10. An assembly tool for the motor rotor according to claim 4, comprising: an annular body (51) extending along the circumferential direction (C); as well as A plurality of inserting portions (52) are arranged at intervals along the circumferential direction (C), each of the inserting portions (52) comprising a first columnar clamp (521) and a second columnar clamp (522) extending toward one axial side, the first columnar clamp (521) being insertable into a spiral structure formed by the first elastic support portion (41) and the second columnar clamp (522) being insertable into a spiral structure formed by the second elastic support portion (42), so that the elastic support member (4) is held by the corresponding inserting portion (52).

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