motor stator

Abstract

The application relates to the motor technical field, and particularly discloses a motor stator, which comprises a stator core; the stator core comprises a core yoke part and a plurality of core tooth parts; wherein the core yoke part comprises a plurality of spliced core parts connected together, each spliced core part is provided with a first groove on an inner wall surface facing the inside of the stator core; each core tooth part is provided with a first protrusion; the first protrusion is clamped in the first groove, so that the core tooth part is connected to the inner wall surface of the spliced core part. The motor stator of the application can improve or prevent dislocation between the core yoke part and the core tooth part through the matching structure of the first groove and the first protrusion, thereby improving the stability and reliability of the structure and the efficiency of the motor. Moreover, the spliced structure composed of the plurality of spliced core parts and the plurality of core tooth parts allows the motor stator to independently complete winding on a single spliced structure, the reserved size required by traditional integrated winding can be eliminated, thereby improving the slot fill rate and enhancing the power density of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a motor stator. Background Technology

[0002] As vehicles become more widespread, people have increasingly higher demands for the power, economy, and driving comfort of the entire vehicle. As the core component of electric vehicles and the power source of the entire vehicle, the drive motor is facing increasingly stringent requirements from OEMs regarding its efficiency and power density.

[0003] However, most of the motors currently used in vehicles suffer from problems such as low efficiency and low power density. Utility Model Content

[0004] This application provides an electric motor stator, an electric motor, and a vehicle. The electric motor stator can improve the stability and reliability of the structure, thereby increasing the efficiency and power density of the electric motor.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a motor stator, the motor stator including a stator core; the stator core including a core yoke and a plurality of core teeth; wherein, the core yoke is formed by connecting a plurality of spliced ​​cores, each spliced ​​core having a first groove on its inner wall facing the interior of the stator core; each core tooth having a first protrusion; the first protrusion being secured to the first groove, so that the core tooth is connected to the inner wall of the spliced ​​core.

[0006] The inner wall of each spliced ​​iron core is arc-shaped, and the arc-shaped surfaces are connected to form the annular inner wall of the iron core yoke; the iron core teeth are evenly arranged along the annular inner wall of the iron core yoke; the end of each iron core tooth opposite to the first protrusion includes an arc-shaped inner end face; the inner end face of the iron core tooth is concentrically arranged around the circle it is in with the annular inner wall.

[0007] Each spliced ​​iron core has an inner wall surface that is arc-shaped; each spliced ​​iron core also includes an outer wall surface that is opposite to the inner wall surface, and the outer wall surface is also arc-shaped; each spliced ​​iron core also includes a first end face and a second end face that are connected to the inner wall surface and the outer wall surface respectively and are opposite to each other; the inner wall surface, the first end face, the second end face and the outer wall surface of each spliced ​​iron core form a fan ring; the first end face and the second end face of each two adjacent spliced ​​iron cores abut against each other and form an interference fit connection.

[0008] Each spliced ​​iron core also includes a first end face and a second end face that are respectively connected to the inner wall and are opposite to each other. The first end face is provided with a second groove, and the second end face is provided with a second protrusion. The second protrusion of each two adjacent spliced ​​iron cores is fixed in the second groove.

[0009] Each spliced ​​iron core also includes an outer wall surface opposite to the inner wall surface, and each outer wall surface is provided with a protrusion, with a connecting channel formed between two adjacent protrusions.

[0010] In this configuration, the distance between each protrusion and the corresponding first end face and the corresponding second end face is equal.

[0011] Each spliced ​​iron core includes multiple yoke laminations, which are stacked along the axial direction of the iron core yoke to form the spliced ​​iron core, and each lamination is a non-oriented silicon steel sheet; the iron core tooth section includes multiple tooth laminations, which are stacked along the axial direction of the iron core yoke to form the iron core tooth section, and each tooth lamination is any one of oriented silicon steel sheet, amorphous alloy sheet, or soft magnetic sheet.

[0012] Each yoke lamination includes a fan-shaped annular plate, the inner wall of which is provided with a connecting groove. Multiple connecting grooves are aligned along the axial direction of the iron core yoke to form a first groove. Each tooth lamination is provided with a corresponding connecting protrusion. Multiple connecting protrusions are aligned along the axial direction of the iron core yoke to form a first protrusion.

[0013] The yoke punch has a snap-fit ​​groove and a snap-fit ​​protrusion that matches the snap-fit ​​groove at its two opposite ends. After the multiple snap-fit ​​grooves and multiple snap-fit ​​protrusions are aligned, they form a second groove and a second protrusion, respectively.

[0014] The first groove has at least one guide groove on its inner wall and the first protrusion has a guide protrusion on its side wall corresponding to the guide groove.

[0015] The beneficial effects of this application are as follows: Unlike existing technologies, the motor stator provided in this application includes a stator core; the stator core includes a core yoke and multiple core teeth; wherein the core yoke is formed by connecting multiple spliced ​​cores, and each spliced ​​core has a first groove on its inner wall facing the stator core; each core tooth has a first protrusion; the first protrusion is secured to the first groove, so that the core tooth connects to the inner wall of the spliced ​​core. The motor stator of this application, through the cooperation structure of the first groove and the first protrusion, can improve or prevent misalignment between the core yoke and the core teeth under motor vibration and impact, thereby improving the stability and reliability of the structure and increasing the efficiency of the motor. Furthermore, the spliced ​​structure composed of multiple spliced ​​cores and multiple core teeth allows the motor stator to complete winding independently on a single spliced ​​structure, eliminating the reserved dimensions required for traditional integrated winding, thereby increasing slot fill factor and enhancing the power density of the motor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the motor stator of this application. The motor stator includes a stator core, and the stator core includes a core yoke and a core tooth. The core yoke is formed by connecting multiple spliced ​​cores.

[0018] Figure 2 yes Figure 1 A schematic diagram of a cross-section of the stator of a medium-sized motor.

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the spliced ​​iron core;

[0020] Figure 4 yes Figure 1 Schematic diagram of the structure of the toothed part of the iron core;

[0021] Figure 5 yes Figure 1 A schematic diagram of the structure connecting the spliced ​​iron core and the iron core teeth;

[0022] Figure 6 This is a schematic diagram of another embodiment of the motor stator of this application;

[0023] Figure 7 yes Figure 6 Schematic diagram of the structure of the toothed part of the iron core;

[0024] Figure 8 This is a schematic diagram of another embodiment of the motor stator of this application;

[0025] Figure 9 This is a schematic diagram of another embodiment of the motor stator of this application;

[0026] Figure 10 This is a schematic diagram of another embodiment of the motor stator of this application.

[0027] Reference numerals in the attached figures: 1. Stator core; 11. Core yoke; 12. Core teeth; 111. Spliced ​​core; 1111. Inner wall surface; 1112. Outer wall surface; 1113. First end face; 1114. Second end face; 1115. Yoke lamination; 1116. Connecting groove; 1117. Snap-fit ​​groove; 1118. Snap-fit ​​protrusion; 112. First groove; 1121. Guide groove; 121. First protrusion; 1211. Guide protrusion; 113. Second groove; 114. Second protrusion; 115. Protrusion; 116. Connecting channel; 122. Tooth lamination; 1221. Connecting protrusion. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] Please refer to the reference. Figure 1 , Figure 1This is a schematic diagram of a motor stator embodiment provided in this application. This application provides a motor stator including a stator core; the stator core includes a core yoke and multiple core teeth; wherein the core yoke is formed by connecting multiple spliced ​​cores, each spliced ​​core having a first groove on its inner wall facing the stator core; each core tooth has a first protrusion; the first protrusion is secured to the first groove, connecting the core tooth to the inner wall of the spliced ​​core. The motor stator of this embodiment, through the cooperation structure of the first groove and the first protrusion, can improve or prevent misalignment between the core yoke and the core teeth under motor vibration and impact, thereby improving the stability and reliability of the structure and increasing the efficiency of the motor. Furthermore, the spliced ​​structure composed of multiple spliced ​​cores and multiple core teeth allows the motor stator to independently complete winding on a single spliced ​​structure, eliminating the reserved dimensions required for traditional integrated winding, thereby increasing slot fill factor and enhancing the power density of the motor.

[0033] Specifically, the stator core includes a core yoke and multiple core teeth connected to the core yoke. The core yoke is located on the outer ring side, and the core teeth are located on the inner ring side. The two are connected by a first groove and a first protrusion engaging. Figure 5 As shown, Figure 5 yes Figure 1 The schematic diagram shows the structure of the spliced ​​iron core and the iron core tooth assembly. The iron core yoke can be formed by connecting multiple spliced ​​iron cores. That is, each spliced ​​iron core can be individually connected with one or more iron core teeth to form a spliced ​​structure, and then multiple spliced ​​structures can be connected to form a complete stator iron core. In a specific embodiment, as shown... Figure 2 As shown, Figure 2 yes Figure 1 A schematic diagram of a cross-section of the motor stator shows that the number of spliced ​​iron cores can be the same as the number of iron core teeth. That is, each spliced ​​iron core has a first groove on its inner ring, corresponding to a first protrusion on each iron core tooth, thereby increasing the number of spliced ​​structures. Since each spliced ​​structure can complete independent winding, eliminating the reserved size required for traditional integrated winding, increasing the number of spliced ​​structures can further improve the slot fill factor of the motor stator, thus enhancing the power density of the motor. In another specific embodiment, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of another embodiment of the motor stator of this application. Each spliced ​​iron core can be connected to two or even three iron core teeth. By reducing the number of spliced ​​iron cores, the errors and tolerances generated when connecting multiple spliced ​​iron cores can be reduced, thereby improving the stability and reliability of the iron core yoke.

[0034] Furthermore, the design of the stator core, which is composed of multiple parts connected to form a whole, can reduce machining waste, improve material utilization, and reduce production costs by optimizing the material layout. It also facilitates later maintenance and replacement.

[0035] like Figure 3 and Figure 4 As shown, Figure 3 yes Figure 1 A schematic diagram of the structure of the spliced ​​iron core. Figure 4 yes Figure 1 A schematic diagram of the structure of the toothed part of the iron core. In one embodiment of this application, at least one guide groove is provided on the opposite inner wall of the first groove, and a guide protrusion corresponding to the guide groove is provided on the opposite side wall of the first protrusion.

[0036] Specifically, the two opposing inner walls of the first groove can each be provided with a guide groove with a circular cross-section, and the opposing side walls of the first protrusion can be provided with circular guide protrusions. The mating of the guide grooves and guide protrusions serves to guide and improve or prevent the core teeth from detaching from the core yoke, allowing the core teeth to be installed by inserting the first protrusion into the first groove along the axial direction of the core yoke, further enhancing the stability of the connection. In another specific embodiment, a guide groove can also be provided on one of the inner walls of the first groove to reduce material structure and lower costs. Of course, as... Figure 6 and Figure 7 As shown, Figure 6 This is a schematic diagram of another embodiment of the motor stator of this application. Figure 7 yes Figure 6 The schematic diagram of the toothed part of the iron core shows that, in order to improve the stability of the connection, the number of the first protrusion can be more than one, such as two or more.

[0037] It should be noted that the axial limiting of the motor stator in this embodiment can be performed on the production line, so there is no need to set an additional axial limiting structure on the stator core.

[0038] In one embodiment of this application, the inner wall surface of each spliced ​​iron core is an arc-shaped surface, and the arc-shaped surfaces are connected to form the annular inner wall of the iron core yoke; the iron core teeth are evenly arranged along the annular inner wall of the iron core yoke; the end of each iron core tooth opposite to the first protrusion includes an arc-shaped inner end face; the inner end face of the iron core tooth is concentrically arranged around the circle it is in with the annular inner wall.

[0039] Specifically, the concentric arrangement of the annular inner wall of the iron core yoke and the circle surrounding the inner end face of the iron core teeth means that the central axis of the circle surrounding the iron core yoke and multiple iron core teeth coincides, thus achieving geometric symmetry in the motor stator structure. The uniform arrangement of the iron core teeth along the annular inner wall means that the iron core teeth are arranged at equal intervals along the circumference of the iron core yoke. This uniform circumferential arrangement of the iron core teeth makes the air gap magnetic field distribution of the motor more uniform, reducing cogging torque and back EMF waveform distortion, thereby improving motor efficiency and power density. The concentric arrangement allows for precise alignment of the iron core yoke and the iron core teeth, improving or avoiding vibration and misalignment problems caused by structural eccentricity, enhancing the stability of the motor stator operation, maintaining low noise and high precision during high-speed operation, and providing a reliable foundation for subsequent winding and welding processes, further improving slot fill factor and overall performance.

[0040] In one embodiment of this application, combined with Figure 3 As shown, each spliced ​​iron core also includes a first end face and a second end face that are respectively connected to the inner wall surface and are opposite to each other. The first end face is provided with a second groove, and the second end face is provided with a second protrusion. The second protrusion of each two adjacent spliced ​​iron cores is fixed in the second groove.

[0041] Specifically, the first end face of the spliced ​​iron core is provided with a second groove, and the second end face is provided with a second protrusion that matches the second groove. This structural design allows multiple spliced ​​iron cores to be joined end-to-end in a circumferential splicing. In one specific embodiment, the second groove and the second protrusion can be designed in an arc shape to achieve a tight fit during interference fit, while also serving as a guide and preventing detachment. This ensures that the installation direction of the spliced ​​iron core is along the axial direction of the iron core yoke, with the second protrusion embedded in the second groove. In another specific embodiment, the second groove and the second protrusion can also be set in a trapezoidal or other shaped cross section to improve the stability and reliability of the connection. The matching design of the second groove and the second protrusion provides precise positioning guidance during the circumferential splicing process, improving or preventing splicing misalignment caused by vibration or mechanical impact during motor operation, thereby improving the overall structural stability of the stator iron core. This structure not only reduces the reliance on additional welding or riveting, but also ensures that the spliced ​​stator iron core has good dimensional and positional tolerances such as roundness and cylindricity, improving or avoiding the impact of welding slag or assembly errors on motor performance. Ultimately, by enhancing the reliability of the stator core, iron losses and noise during motor operation were reduced, slot fill factor and power density were increased, and motor efficiency was comprehensively optimized.

[0042] Furthermore, the dimensions of the second groove and the second protrusion can be adjusted according to the thickness and material properties of the spliced ​​core to adapt to the splicing requirements of different motor slot numbers, while maintaining compatibility with existing stator yoke core components and stator tooth core components.

[0043] In one embodiment of this application, combined with Figure 2 and Figure 3 As shown, each spliced ​​iron core also includes an outer wall surface opposite to the inner wall surface, and each outer wall surface is provided with a protrusion, with a connecting channel formed between two adjacent protrusions.

[0044] Specifically, the protrusions are located on the outer wall of the spliced ​​iron core, and there is a height difference between them and the two ends of the spliced ​​iron core. Therefore, when two adjacent spliced ​​iron cores are connected, there is a gap between the two protrusions, and the height difference allows these two protrusions to form a connection channel together with the ends of the spliced ​​iron core. This connection channel can be used for welding, that is, the two protrusions are welded together through the connection channel, further improving the stability and reliability of the connection between multiple spliced ​​iron cores. The depth and width of the connection channel can be adjusted according to the number of spliced ​​iron cores and the welding process to improve the stability of the welding.

[0045] Because the connection channel is formed by the recess between two protrusions, the welding slag produced during the welding process will not overflow, thus improving or avoiding the interference of welding slag on the installation of the motor and the housing. At the same time, it improves or avoids the influence on the form and position tolerances such as the roundness and cylindricity of the stator core, thereby improving the assembly accuracy and operational stability of the motor and enhancing the overall reliability and efficiency of the motor.

[0046] In one embodiment of this application, the distance between each protrusion and the corresponding first end face and the corresponding second end face is equal.

[0047] Specifically, the protrusion is located in the middle of the outer wall surface, which makes the width of the connecting channel formed on both sides equal, thereby unifying the size of the connecting channel, improving or avoiding uneven force on the outer ring of the iron core yoke, and improving the stability and reliability of the overall structure.

[0048] Please continue to combine Figure 9 , Figure 9 This is a schematic diagram of another embodiment of the motor stator of this application. In another embodiment of this application, unlike the above embodiment, the inner wall surface, first end face, second end face and outer wall surface of each spliced ​​iron core form a fan ring; the first end face and second end face of each two adjacent spliced ​​iron cores abut against each other and form an interference fit connection.

[0049] Specifically, the outer ring of the spliced ​​iron core can also be without a protrusion. In other words, two adjacent spliced ​​iron cores are tightly connected only through an interference fit between a second protrusion and a second groove. This method simplifies the manufacturing process of the motor stator and reduces production costs.

[0050] In one embodiment of this application, combined with Figure 5 and Figure 7As shown, each spliced ​​iron core includes multiple yoke laminations, which are stacked along the axial direction of the iron core yoke to form the spliced ​​iron core, and each lamination is a non-oriented silicon steel sheet; the iron core tooth section includes multiple tooth laminations, which are stacked along the axial direction of the iron core yoke to form the iron core tooth section, and each tooth lamination is any one of oriented silicon steel sheet, amorphous alloy sheet, or soft magnetic sheet.

[0051] Specifically, the spliced ​​core is formed by stacking multiple stamped laminations, each made of non-oriented silicon steel sheet. The core teeth are formed by stacking multiple stamped tooth laminations, each made of oriented silicon steel sheet, amorphous alloy sheet, or soft magnetic sheet. Non-oriented silicon steel sheets have the characteristic of balanced magnetic properties, making them suitable for the low magnetic density environment of the core yoke; while oriented silicon steel sheets have high permeability and low iron loss characteristics, making them suitable for the high magnetic density environment of the core teeth; amorphous alloy sheets and soft magnetic sheets also have low iron loss characteristics, which can reduce iron loss. This material differentiation design allows the core yoke to use non-oriented silicon steel sheets under low magnetic density conditions, improving or avoiding the unnecessary application of high iron loss materials in the yoke, while the core teeth use oriented silicon steel sheets, amorphous alloy sheets, or soft magnetic sheets under high magnetic density conditions, reducing iron loss. The reduction of iron losses directly improves the efficiency and power density of the motor, while also enhancing the stability and reliability of the stator structure. This optimizes the overall performance of the motor and solves the problem of high iron losses and low efficiency caused by material mismatch. Furthermore, the unique splicing design of the iron core yoke and iron core teeth for different materials significantly increases material utilization, saving on stator core material costs.

[0052] In one embodiment of this application, as Figure 3 As shown, each yoke lamination includes a fan-shaped annular plate, the inner wall of which is provided with a connecting groove. Multiple connecting grooves are aligned along the axial direction of the iron core yoke to form a first groove. Each tooth lamination is provided with a corresponding connecting protrusion. Multiple connecting protrusions are aligned along the axial direction of the iron core yoke to form a first protrusion.

[0053] Specifically, the yoke laminations are provided with connecting grooves. When multiple yoke laminations are stacked axially, the corresponding connecting grooves align along a straight line, thereby forming a first groove extending axially. Similarly, a first protrusion is formed. This method improves the continuity and flatness of the inner wall of the first groove and its matching with the first protrusion, thereby enhancing the stability and reliability of the connection.

[0054] Furthermore, the outer ring of the yoke lamination can also be provided with a protrusion. When multiple yoke laminations are stacked to form a spliced ​​iron core, the protrusions of each yoke lamination are located on the same straight line to achieve precise positioning during the stacking process, thereby forming continuous and neat protrusions and improving or avoiding misalignment of the protrusions.

[0055] Furthermore, since the connecting channel is formed by two adjacent protrusions and corresponding recessed ends, the continuous and neat protrusions can also improve the continuity and reliability of the connecting channel.

[0056] In one embodiment of this application, the opposite ends of the yoke punch are respectively provided with a snap-fit ​​groove and a snap-fit ​​protrusion that matches the snap-fit ​​groove. After the multiple snap-fit ​​grooves and multiple snap-fit ​​protrusions are aligned, they respectively form a second groove and a second protrusion.

[0057] Specifically, multiple snap-fit ​​grooves are aligned along the same straight line to form a second groove, which can improve the continuity and integrity of the second groove. Similarly, the snap-fit ​​protrusions can improve the matching between the two, thereby improving the stability and reliability of the connection.

[0058] Please continue to combine Figure 10 , Figure 10 This is a schematic diagram of another embodiment of the motor stator of this application. In another embodiment of this application, multiple spliced ​​iron cores can also be integrally formed.

[0059] Specifically, multiple spliced ​​iron cores can be molded as a single piece, thus directly forming the entire iron core yoke. This simplifies the manufacturing process, reduces production costs, improves or avoids misalignment between the iron core teeth and the iron core yoke, and the seamless design avoids welding slag affecting precision, enabling the motor to maintain high efficiency and durability under high load operation.

[0060] In another aspect, this application also provides an electric motor that includes the aforementioned motor stator. Specifically, since this motor includes the motor stator described in the above embodiments, it also possesses the beneficial effects of the aforementioned motor stator, which will not be elaborated further here.

[0061] In another aspect, this application also provides a vehicle that includes the aforementioned motor. Specifically, since the vehicle includes the motor described in the above embodiments, it also possesses the beneficial effects of the aforementioned motor, which will not be elaborated further here.

[0062] It should be noted that the terms "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. Similarly, the terms "parallel" and "perpendicular" do not imply that the components are absolutely parallel or perpendicular, but rather that they can have a certain angular deviation. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted. In addition, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships that are commonly used when the product of this application is in use. They are only for the purpose of describing the embodiments of this application and 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 this application.

[0063] It is understood that the term "multiple" in this document means at least two, such as two, three, etc., unless otherwise specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0064] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A motor stator, characterized in that, include: Stator core (1), the stator core (1) includes a core yoke (11) and a plurality of core teeth (12); wherein, The iron core yoke (11) is formed by connecting multiple spliced ​​iron cores (111), and each spliced ​​iron core (111) has a first groove (112) on the inner wall surface (1111) facing the inside of the stator iron core (1); Each of the iron core teeth (12) is provided with a first protrusion (121); The first protrusion (121) is secured to the first groove (112), so that the iron core teeth (12) are connected to the inner wall of the spliced ​​iron core (111).

2. The motor stator according to claim 1, characterized in that, Each of the spliced ​​iron cores (111) has an arc-shaped inner wall surface (1111), and the arc-shaped surfaces are connected to form the annular inner wall of the iron core yoke (11); The iron core teeth (12) are evenly arranged along the annular inner wall of the iron core yoke (11); Each of the iron core teeth (12) has an arc-shaped inner end face at the end opposite to the first protrusion (121); The inner end face of the iron core tooth (12) is arranged concentrically with the inner wall of the annular ring.

3. The motor stator according to claim 1, characterized in that, The inner wall surface (1111) of each of the spliced ​​iron cores (111) is an arc-shaped surface; Each of the spliced ​​iron cores (111) also includes an outer wall surface (1112) opposite to the inner wall surface (1111), and the outer wall surface (1112) is also an arc surface; Each of the spliced ​​iron cores (111) further includes a first end face (1113) and a second end face (1114) that are respectively connected to the inner wall surface (1111) and the outer wall surface (1112) and are opposite to each other; The inner wall surface (1111), the first end face (1113), the second end face (1114), and the outer wall surface (1112) of each of the spliced ​​iron cores (111) form a fan ring; The first end face (1113) and the second end face (1114) of each two adjacent spliced ​​iron cores (111) abut against each other and form an interference fit connection.

4. The motor stator according to claim 2, characterized in that, Each of the spliced ​​iron cores (111) further includes a first end face (1113) and a second end face (1114) that are respectively connected to the inner wall surface (1111) and opposite to each other, wherein the first end face (1113) is provided with a second groove (113) and the second end face (1114) is provided with a second protrusion (114). The second protrusion (114) of each two adjacent spliced ​​iron cores (111) is secured to the second groove (113).

5. The motor stator according to claim 4, characterized in that, Each of the spliced ​​iron cores (111) also includes an outer wall surface (1112) opposite to the inner wall surface (1111), and each of the outer wall surfaces (1112) is provided with a protrusion (115), and a connecting channel (116) is formed between two adjacent protrusions (115).

6. The motor stator according to claim 5, characterized in that, The distance between each of the protrusions (115) and the corresponding first end face (1113) and the corresponding second end face (1114) is equal.

7. The motor stator according to claim 1, characterized in that, Each of the spliced ​​iron cores (111) includes a plurality of yoke laminations (1115), the plurality of yoke laminations (1115) are stacked along the axial direction of the iron core yoke (11) to form the spliced ​​iron core (111), and each of the yoke laminations (1115) is a non-oriented silicon steel sheet. The iron core tooth (12) includes a plurality of toothed laminations (122), which are stacked along the axial direction of the iron core yoke (11) to form the iron core tooth (12), and each toothed lamination (122) is any one of oriented silicon steel sheet, amorphous alloy sheet, or soft magnetic sheet.

8. The motor stator according to claim 7, characterized in that, Each of the yoke laminations (1115) includes a fan-shaped annular plate, and the inner wall surface (1111) of the fan-shaped annular plate is provided with a connecting groove (1116). After the multiple connecting grooves (1116) are aligned along the axial direction of the iron core yoke (11), the first groove (112) is formed. Each of the toothed laminations (122) is provided with a connecting protrusion (1221), and the first protrusion (121) is formed by aligning the plurality of connecting protrusions (1221) along the axial direction of the iron core yoke (11).

9. The motor stator according to claim 8, characterized in that, The opposite ends of the yoke punch (1115) are respectively provided with a snap-fit ​​groove (1117) and a snap-fit ​​protrusion (1118) that matches the snap-fit ​​groove (1117). After the multiple snap-fit ​​grooves (1117) and multiple snap-fit ​​protrusions (1118) are aligned, they respectively form a second groove (113) and a second protrusion (114).

10. The motor stator according to claim 1, characterized in that, At least one guide groove (1121) is provided on the opposite inner wall of the first groove (112), and a guide protrusion (1211) corresponding to the guide groove is provided on the opposite side wall of the first protrusion (121).

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