Motor rotor structure and forming method thereof

Abstract

The application discloses a motor rotor structure and a forming processing method thereof, and belongs to the field of rotor processing and forming. The motor rotor structure comprises a rotor shaft, a rotor core and a magnetic tile which are coaxially distributed and are mounted on the outer periphery of the rotor shaft; a positioning portion is formed on the end face of one end of the rotor shaft, the length extension direction center line of the positioning portion extends along the radial direction of the rotor shaft; a group of mounting holes are arranged on the end face of the end portion of the rotor core, the center line of the group of mounting holes extends along the radial direction of the rotor core; a plurality of pairs of magnetic tiles are arranged around the outer periphery of the rotor core, and the center line between each pair of magnetic tiles extends along the radial direction of the rotor core; the length extension direction center line of the positioning portion, the center line of the group of mounting holes and the center line of a certain pair of magnetic tiles are in the same straight line direction. The application is helpful to guarantee the magnetization performance of the rotor and the consistency of magnetization.

Description

Technical Field

[0001] This invention relates to the field of rotor processing and forming technology, and more specifically, to a motor rotor structure and its forming and processing method. Background Technology

[0002] In pump design and manufacturing, the magnetic properties of the rotor assembly are one of the core factors determining the overall efficiency and long-term operational stability. Existing rotor assembly manufacturing processes typically follow a "press-fitting first, then magnetizing" process, which involves first mechanically pressing and fixing the motor shaft, rotor core, and multiple magnets to form a complete rotor structure, and then placing the entire assembly in a magnetizing device for excitation treatment.

[0003] However, this process faces significant quality control challenges in actual implementation. Since the magnets are enclosed in their corresponding slots within the rotor core after press-fitting, their positions are difficult to adjust or verify effectively in subsequent processes. During magnetization, even a slight deviation in the spatial orientation of the applied magnetic field relative to the magnet will directly cause the orientation of the magnetic domains within the magnet to fail to meet design expectations, thereby weakening magnetization saturation and affecting the uniformity of the magnetic field distribution. More importantly, due to limitations in press-fitting precision and assembly errors, the actual positions of the magnets among rotors in mass production are dispersed. This makes it difficult to maintain consistent magnetization effects across different rotors under the same magnetization parameters, ultimately causing fluctuations in the magnetic properties of the product and reducing the overall consistency of the batch of rotors.

[0004] The uncertainty of magnetization effect during rotor machining not only restricts the performance of individual pumps, but also hinders the quality stability control of large-scale production. Therefore, how to ensure the reliability and repeatability of magnetization effect has always been an important research direction in the industry. Summary of the Invention

[0005] 1. The technical problem that the invention aims to solve In view of the poor stability of magnetization effect during the processing of motor rotors in the prior art, the present invention aims to provide a motor rotor structure and its forming and processing method, which helps to ensure the magnetic performance of the rotor and ensure the consistency of the magnetization effect.

[0006] 2. Technical Solution To achieve the above objectives, the technical solution provided by this invention is as follows: The present invention discloses a motor rotor structure, comprising a rotor shaft, a rotor core coaxially distributed around the outer periphery of the rotor shaft, and magnetic tiles uniformly arranged around the outer periphery of the rotor core; a positioning part is provided on one end face of the rotor shaft, the center line of the length extension direction of the positioning part extends radially along the rotor shaft; a set of mounting holes is provided on the end face of the rotor core, the center line of the set of mounting holes extends radially along the rotor core; multiple pairs of magnetic tiles are arranged around the outer periphery of the rotor core, the center line between each pair of magnetic tiles extends radially along the rotor core; the projections of the center line of the extension direction of the positioning part, the center line of the set of mounting holes, and the center line of a pair of magnetic tiles lie on the same straight line under the same projection direction.

[0007] This invention provides a positioning part on the rotor shaft and mounting holes on the rotor core. During the press-fitting process of the motor rotor, the positioning part positions the rotor shaft, and the mounting holes position the rotor core, thereby ensuring the precise matching of the rotor core and the rotor shaft. This ensures the accuracy of the relative position between the magnet and the positioning part on the rotor shaft during subsequent magnet installation. Then, during the magnetization process, the same positioning method of the positioning part can be used to further ensure the accuracy of the position between the magnetizing head and the magnet, thereby ensuring magnetization performance and maintaining magnetization consistency and stability.

[0008] Furthermore, multiple magnetic tile mounting areas are evenly distributed circumferentially around the outer periphery of the rotor core, with adjacent magnetic tile mounting areas separated by partition ribs. Along the radial direction of the rotor core, the projection of the center line connecting a pair of magnetic tile mounting areas and the center line extending from the positioning part, in the same projection direction, lies on the same straight line. In practice, the magnetic tiles can be glued to the magnetic tile mounting areas. By controlling the accuracy of the position of the center line connecting the magnetic tile mounting areas and the positioning part, the installation position of the magnetic tiles can be accurately defined, further achieving precise control over the position of the magnetic tiles.

[0009] Furthermore, the rotor core is equipped with multiple fixing pins, with both ends of each pin extending out from the end face of the rotor core. In practice, the rotor core is constructed by stacking multiple core pieces sequentially on the fixing pins, using the fixing pins to centrally fix the multiple core pieces.

[0010] Furthermore, end caps are provided at both axial ends of the rotor core. The inner surface of the end cap facing the rotor core has a recessed inner annular groove, into which the end of the fixing pin extends. The inner annular groove effectively avoids the fixing pin.

[0011] Furthermore, the mounting hole is a through hole penetrating the axial thickness of the rotor core. Even further, the rotor core is also provided with multiple sets of weight-reducing holes. In practice, weight-reducing holes are commonly used to effectively reduce weight in the rotor core. This invention can utilize these pre-existing weight-reducing holes as mounting holes and control their positional distribution, thus achieving both effective weight reduction and precise positioning.

[0012] This invention also provides a method for forming and processing the above-mentioned motor rotor structure, the process of which is as follows: S1. Assembly process: The rotor shaft is positioned using the positioning part, the rotor core is assembled onto the rotor shaft, and multiple pairs of magnetic tiles are installed on the outer periphery of the rotor core. The projection of the center line of the extension direction of the positioning part on the rotor shaft, the center line of a set of mounting holes on the rotor core, and the center line of a pair of magnetic tiles are all located on the same straight line under the same projection direction. S2. Magnetization process: The assembled motor rotor structure is placed in the magnetization assembly, and the rotor shaft is positioned and magnetized using the positioning part.

[0013] Furthermore, in the S1 assembly process, a press-fitting assembly is used for press-fitting. The press-fitting assembly is equipped with a mating part that matches the positioning part and a set of positioning pins that match the mounting hole. The mating part is used to position the rotor shaft, and the positioning pins are used to position the rotor core. The rotor core and the rotor shaft are then press-fitted together. The center line of the extension direction of the mating part and the center line of the set of positioning pins are projected onto the same straight line in the same projection direction.

[0014] By coordinating the positioning part and the mounting hole, the assembly position between the rotor core and the rotor shaft is ensured. Then, the magnetic tiles are pasted on the rotor core to achieve consistency between the position of the magnetic tiles and the position of the positioning part on the rotor shaft. During the magnetization stage, the same positioning method is used to ensure that the distribution of multiple magnetic poles in the magnetization head corresponds to the distribution position of each magnetic tile, thereby ensuring the magnetization effect. Moreover, for mass production, it can effectively ensure the consistency and stability of magnetization.

[0015] Furthermore, the press-fit assembly includes an upper press-fit component and a lower press-fit component. The upper press-fit component has an upper cavity that accommodates one end of the rotor shaft, and a mating part is provided in the upper cavity. The lower press-fit component has a lower cavity that accommodates the other end of the rotor shaft, and a set of positioning pins are provided on the support platform at the top of the lower cavity.

[0016] Furthermore, the positioning part at the end of the rotor shaft is an inwardly recessed positioning groove, and the mating part on the upper press-fit component is a positioning rib protruding upward within the upper cavity, which fits and embeds into the positioning groove. In practice, positioning ribs can also be provided at the end of the rotor shaft, and positioning grooves can also be provided within the upper cavity to achieve embedded positioning.

[0017] Furthermore, the support platform of the pressing component is also provided with a downwardly recessed clearance position, into which the protruding fixing pins on the rotor core can extend. The clearance position can adopt a clearance hole structure corresponding to each fixing pin, or an annular groove structure adapted to the distribution path of multiple fixing pins, etc., which can effectively avoid clearance and ensure that the rotor core can be effectively pressed during pressing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the motor rotor structure in this invention; Figure 2 for Figure 1 Another perspective structural diagram; Figure 3 This is a cross-sectional view of the motor rotor in this invention. Figure 4 This is a schematic diagram of the end cap structure in this invention; Figure 5 This is a schematic diagram of the end cap structure from another perspective in this invention; Figure 6 This is a schematic diagram of the rotor core structure in this invention; Figure 7 This is a schematic diagram showing the distribution of the magnetic tiles in this invention; Figure 8 This is a schematic diagram of the lower pressing component in this invention; Figure 9 This is a schematic diagram of the upper press-fit component in this invention.

[0019] Explanation of the labels in the diagram: 100. Rotor shaft; 101. Positioning part; 102. Thrust bearing; 110. End cover; 111. Inner annular groove; 112. Outer annular groove; 200. Magnet tile assembly; 210. Rotor core; 211. Mounting hole; 212. Fixing pin; 213. Magnet tile mounting area; 214. Separating rib; 215. Through hole; 220. Magnet tile; 300. Lower pressing component; 301. Support platform; 302. Lower cavity; 303. Positioning post; 304. Clearance position; 310. Upper pressing component; 311. Upper cavity; 312. Mating part. Detailed Implementation

[0020] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] The present invention will be further described below with reference to embodiments.

[0023] Example Combination Figures 1 to 9 As shown, a motor rotor structure of this embodiment includes a rotor shaft 100, and a magnetic tile assembly 200 is provided on the outer periphery of the rotor shaft 100. The magnetic tile assembly 200 specifically includes a rotor core 210 and magnetic tiles 220. The rotor core 210 is coaxially distributed on the outer periphery of the rotor shaft 100, and the magnetic tiles 220 are uniformly arranged around the outer side of the rotor core 210. A positioning part 101 is provided on one end face of the rotor shaft 100, and the center line of the length extension direction of the positioning part 101 extends radially along the rotor shaft 100. A set of mounting holes 211 is provided on the end face of the rotor core 210. The center line of the set of mounting holes 211 extends radially along the rotor core 210. Multiple pairs of magnetic tiles 220 are arranged around the outer periphery of the rotor core 210. The center line between each pair of magnetic tiles 220 extends radially along the rotor core 210. The projection of the center line of the extending direction of the positioning part 101, the center line of the set of mounting holes 211, and the center line of a certain pair of magnetic tiles 220, in the same projection direction, are all on the same straight line; that is, as shown in the figure. Figure 7 As shown, the projections of the three lines lie on the same line P.

[0024] Specific combination Figure 7 As shown, from a top view along the axial direction of the rotor shaft 100, the positioning part 101 extends radially along the end face of the rotor shaft 100, and the center line of the positioning part 101 extends along the straight line P. Similarly, a set of mounting holes 211 specifically includes two mounting holes 211 extending radially along the rotor core 210. The two mounting holes 211 are located outside the ends of the positioning part 101, and the center line connecting the two mounting holes 211 is collinear with the straight line P. Similarly, multiple pairs of magnetic tiles 220 are evenly distributed on the outer periphery of the rotor core 210. In this embodiment, a pair of magnetic tiles 220 refers to two magnetic tiles 220 distributed radially at both ends of the rotor core 210, not two adjacent magnetic tiles 220. The center line connecting the pair of magnetic tiles 220 is also collinear with the straight line P. This embodiment, through such a design, can achieve precise positioning in the pressing process and the magnetization process, ensuring the quality of molding and magnetization.

[0025] Furthermore, multiple magnetic tile mounting areas 213 are evenly distributed circumferentially around the outer periphery of the rotor core 210, and adjacent magnetic tile mounting areas 213 are separated by partition ribs 214. Along the radial direction of the rotor core 210, the center line connecting a pair of magnetic tile mounting areas 213 and the center line extending from the positioning part 101, when projected in the same direction, have their projections on the same straight line. In practice, after multiple cores are stacked to form the integral rotor core 210 structure, the partition ribs 214 define multiple pairs of magnetic tile mounting areas 213. During installation, the mounting holes 211 and the positioning part 101 ensure that the center line connecting a pair of magnetic tile mounting areas 213 is also collinear with the straight line P, thus ensuring that the center line connecting the magnetic tiles 220 is also collinear with the straight line P after installation.

[0026] In practice, the rotor core 210 is provided with multiple fixing pins 212. Both ends of the fixing pins 212 extend and protrude from the end faces of the rotor core 210. Specifically, the rotor core 210 has an axially penetrating through-hole 215, in which the fixing pins 212 are disposed. Multiple cores are effectively fixed and form an integral rotor core 210 structure during stacking using the fixing pins 212. End caps 110 are also provided at both axial ends of the rotor core 210. The inner surface of the end cap 110 facing the rotor core 210 has a recessed inner annular groove 111. The ends of the fixing pins 212 extend into the inner annular groove 111 to achieve clearance during installation.

[0027] Furthermore, in practice, it is preferable to have multiple sets of weight-reduction holes on the rotor core 210, that is, weight-reduction holes can be made on each core to reduce the weight of the core. In this embodiment, the weight-reduction holes already provided can be used as mounting holes 211. In practice, it is preferable that the mounting holes 211 can penetrate the axial thickness of the rotor core 210, and the distribution position of a pair of weight-reduction holes can be controlled to satisfy the aforementioned collinearity with the center line P of the positioning part 101. At this time, there is no need to add other complex positioning structures; precise control of the position of a pair of weight-reduction holes is sufficient.

[0028] This embodiment also provides a forming and processing method for the above-mentioned motor rotor structure, the process of which is as follows: S1. Assembly process: The rotor shaft 100 is positioned using the positioning part 101, the rotor core 210 is assembled onto the rotor shaft 100, and multiple pairs of magnetic tiles 220 are installed on the outer periphery of the rotor core 210. The projection of the center line of the extension direction of the positioning part 101 on the rotor shaft 100, the center line of a set of mounting holes 211 on the rotor core 210, and the center line of a pair of magnetic tiles 220 are all located on the same straight line under the same projection direction. S2. Magnetizing Process: The assembled motor rotor structure is placed in the magnetizing assembly. The rotor shaft 100 is positioned using the positioning part 101 and magnetized. More precisely, the same positioning method is used in the magnetizing assembly. The magnetizing assembly includes a magnetizing head, which has multiple magnetic poles that correspond one-to-one with multiple circumferential magnetic tiles 220. The multiple magnetic poles are distributed in a ring. It is necessary to effectively align the center position of each magnetic pole with the center position of each magnetic tile 220 to improve the magnetizing performance. Adopting the design concept of this embodiment, a matching positioning part adapted to the positioning part 101 is also set at the center of the magnetizing assembly. The center line of the matching positioning part is collinear with the center line of the positioning part 101, and the center line of the matching positioning part is collinear with the center line connecting a pair of magnetic poles in the radial direction. In this way, when the rotor shaft 100 is accurately positioned in the magnetizing assembly using the positioning part 101, it can be ensured that the multiple pairs of magnetic tiles 220 and the multiple pairs of magnetic poles are centered, achieving precise positioning and more stable magnetizing performance. In this embodiment, collinearity refers to the projection of straight lines onto the same straight line under the same projection direction.

[0029] Specifically, in combination Figures 8 to 9 As shown, in this embodiment, the assembly process utilizes a press-fit assembly. The press-fit assembly has a mating part 312 adapted to the positioning part 101 and a set of positioning posts 303 adapted to the mounting hole 211. The mating part 312 positions the rotor shaft 100, and the positioning posts 303 position the rotor core 210, pressing the rotor core 210 onto the rotor shaft 100. The center line extending from the mating part 312 and the center line connecting the positioning posts 303 are projected onto the same straight line in the same projection direction. By utilizing the coordinated positioning of the positioning posts 303 and the mating part 312, the rotor core 210 can be precisely positioned and assembled onto the rotor shaft 100, thereby accurately positioning the position of the magnetic tile mounting area 213 on the outer side of the rotor core 210, ensuring the certainty of the mounting position of the magnetic tile 220 and the position of the positioning part 101 on the rotor shaft 100.

[0030] Furthermore, combining Figure 8 and Figure 9As shown, the press-fit assembly includes an upper press-fit component 310 and a lower press-fit component 300. The upper press-fit component 310 has an upper cavity 311 for accommodating one end of the rotor shaft 100, and a mating part 312 is provided within the upper cavity 311. The lower press-fit component 300 has a lower cavity 302 for accommodating the other end of the rotor shaft 100, and a set of positioning posts 303 are provided on the support platform 301 at the top of the lower cavity 302. More preferably, the positioning part 101 at the end of the rotor shaft 100 is an inwardly recessed positioning groove, and the mating part 312 on the upper press-fit component 310 is a positioning rib protruding upward within the upper cavity 311, which is adapted to fit into the positioning groove. In practice, the positioning part 101 can also be set as a positioning rib, and the mating part 312 can be set as a positioning groove, so that the rotor shaft 100 can be effectively positioned when one end of the rotor shaft 100 is placed into the upper cavity 311. In practice, elastic clamping members are also provided on both sides of the inner wall of the upper cavity 311 to fix the rotor shaft 100 in the upper pressing component 310. A pair of positioning posts 303 are also provided around the outer periphery of the lower cavity 302 on the lower pressing component 300. The pair of positioning posts 303 are embedded in the mounting holes 211 of the rotor core 210, and the direction of the center line connecting the center of the pair of positioning posts 303 is collinear with the direction of the center line of the mating part 312. This ensures that when the rotor shaft 100 is positioned in the upper cavity 311 and the rotor shaft 100 is pressed into the central inner cavity of the rotor core 210 from top to bottom, the assembly direction of the rotor core 210 and the rotor shaft 100 is determined. This ensures that the direction of the center line connecting a pair of magnetic tile mounting areas 213 is collinear with the center line of the positioning part 101. When the magnetic tiles 220 are subsequently pasted, the direction of the center line connecting a pair of magnetic tiles 220 is ensured to be collinear with the center line of the positioning part 101.

[0031] Furthermore, the support platform 301 of the pressing component 300 is also provided with a downwardly recessed clearance position 304, into which the protruding fixing pin 212 on the rotor core 210 extends, achieving both spatial clearance and auxiliary positioning using the fixing pin 212. More precisely, the support platform 301 on the pressing component 300 is used to support the end face of the rotor core 210; a downwardly recessed lower cavity 302 is provided at the center of the support platform 301.

[0032] The forming process of the motor rotor structure is further explained in detail below.

[0033] First, the rotor shaft 100 is placed on the upper pressing component 310, with the positioning part 101 and the mating part 312 engaging for positioning. The rotor core 210 is then placed on the lower pressing component 300, with the positioning pin 303 passing through the mounting hole 211 of the rotor core 210. The fixing pin 212 on the rotor core 210 is also correspondingly embedded in the clearance position 304 to avoid interference. The support platform 301 ensures that the rotor core 210 is pressed to the designed dimensions. The upper pressing component 310 is driven downwards, thereby causing the rotor shaft 100 to move downwards and engage with the rotor core 210 for pressing. After pressing, end caps 110 are installed at both ends of the rotor core 210, and the outer sides of the end caps 110 are welded to the rotor shaft 100. An outer ring groove 112 is provided on the outer surface of the end caps 110 facing away from the rotor core 210 as a weld groove. Then, the magnetic tiles 220 are sequentially pasted onto the magnetic tile mounting area 213 of the rotor core 210, with the length of the magnetic tiles 220 slightly lower than the height of the rotor core 210. Magnetization is performed after all components are installed.

[0034] The molding method of this embodiment can utilize the same positioning method. In the stage of pressing the rotor core 210, the accuracy between the installation direction of the magnet tile 220 and the extension direction of the positioning part 101 on the rotor shaft 100 is first ensured, laying the foundation for subsequent magnetization. Then, the same positioning approach is adopted in the magnetization stage, which can effectively prevent misalignment of the magnetization direction, improve the consistency of the magnetization effect, avoid the weakening or unevenness of the magnetic field caused by magnetization deviation, significantly improve the magnetic properties of the rotor, enhance the stability of product quality, and is suitable for the consistency requirements in mass production.

[0035] The present invention and its embodiments have been described above illustratively. This description is not restrictive and is merely one embodiment of the present invention, and is not actually limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A motor rotor structure, comprising a rotor shaft (100), a rotor core (210) coaxially distributed around the outer periphery of the rotor shaft (100), and magnetic tiles (220) uniformly arranged around the outer side of the rotor core (210), characterized in that: A positioning part (101) is provided on one end face of the rotor shaft (100), and the center line of the length extension direction of the positioning part (101) extends radially along the rotor shaft (100); A set of mounting holes (211) is provided on the end face of the rotor core (210), and the center line of the set of mounting holes (211) extends radially along the rotor core (210); The rotor core (210) is surrounded by multiple pairs of magnetic tiles (220), and the center line between each pair of magnetic tiles (220) extends radially along the rotor core (210); The projections of the center line of the extending direction of the positioning part (101), the center line of a set of mounting holes (211), and the center line of a pair of magnetic tiles (220) are all on the same straight line in the same projection direction.

2. The motor rotor structure according to claim 1, characterized in that: The outer periphery of the rotor core (210) is evenly distributed with multiple magnetic tile mounting areas (213) along the circumferential direction, and adjacent magnetic tile mounting areas (213) are separated by partition ribs (214); along the radial direction of the rotor core (210), the center line connecting a pair of magnetic tile mounting areas (213) and the center line of the extension direction of the positioning part (101) are projected onto the same straight line in the same projection direction.

3. The motor rotor structure according to claim 1, characterized in that: The rotor core (210) is provided with multiple fixing pins (212), and the two ends of the fixing pins (212) extend out of the end face of the rotor core (210).

4. The motor rotor structure according to claim 3, characterized in that: The rotor core (210) has end caps (110) at both axial ends. The inner side of the end cap (110) facing the rotor core (210) has a recessed inner ring groove (111), and the end of the fixing pin (212) extends into the inner ring groove (111).

5. A motor rotor structure according to any one of claims 1-4, characterized in that: The mounting hole (211) is a through hole that penetrates the axial thickness of the rotor core (210); or / and, the rotor core (210) is also provided with multiple sets of weight-removing holes.

6. A method for forming and processing a motor rotor structure as described in any one of claims 1-5, characterized in that, The process is as follows: S1. Assembly process: The rotor shaft (100) is positioned using the positioning part (101), the rotor core (210) is assembled onto the rotor shaft (100), and multiple pairs of magnetic tiles (220) are installed on the outer periphery of the rotor core (210). The center line of the extension direction of the positioning part (101) on the rotor shaft (100), the center line of a set of mounting holes (211) on the rotor core (210), and the center line of a pair of magnetic tiles (220) are all projected onto the same straight line in the same projection direction. S2, Magnetization process: The assembled motor rotor structure is placed in the magnetization assembly, and the rotor shaft (100) is positioned by the positioning part (101) and magnetized.

7. The forming and processing method for a motor rotor structure according to claim 6, characterized in that: In the S1 assembly process, a press-fitting assembly is used for press-fitting. The press-fitting assembly is provided with a mating part (312) that is adapted to the positioning part (101) and a set of positioning pins (303) that are adapted to the mounting hole (211). The mating part (312) is used to position the rotor shaft (100), and the positioning pins (303) are used to position the rotor core (210). The rotor core (210) and the rotor shaft (100) are press-fitted. The center line of the extension direction of the mating part (312) and the center line of the set of positioning pins (303) are located on the same straight line under the same projection direction.

8. The forming and processing method for a motor rotor structure according to claim 7, characterized in that: The press assembly includes an upper press assembly (310) and a lower press assembly (300). The upper press assembly (310) has an upper cavity (311) for accommodating one end of the rotor shaft (100), and a mating part (312) is provided in the upper cavity (311). The lower pressing component (300) is provided with a lower cavity (302) for accommodating the other end of the rotor shaft (100), and a set of positioning pins (303) are provided on the support platform (301) at the top of the lower cavity (302).

9. The forming and processing method for a motor rotor structure according to claim 8, characterized in that: The positioning part (101) at the end of the rotor shaft (100) is an inwardly recessed positioning groove, and the mating part (312) on the upper press-fit part (310) is a positioning rib protruding upward inside the upper cavity (311), which is adapted to be embedded in the positioning groove.

10. A method for forming and processing a motor rotor structure according to claim 8, characterized in that: The support platform (301) of the pressing component (300) is also provided with a downwardly recessed clearance position (304), into which the protruding fixing pin (212) on the rotor core (210) extends.

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