Stator assembly and motor having the same

Abstract

The application discloses a kind of stator assembly and motor with it, stator assembly includes: multiple stator cores, multiple stator cores are arranged along the circumferential direction of stator assembly interval;Cover plate, cover plate is located in the side of multiple stator cores along the axial direction of stator assembly, the side of cover plate towards stator core has fixed slot;Tooth shoe, at least part of tooth shoe is inserted in fixed slot, along the circumferential direction of stator assembly, between any adjacent two stator cores there is at least part of tooth shoe.According to the stator assembly of the application, by setting fixed slot on the side of cover plate towards stator core, and making at least part of tooth shoe inserted in fixed slot, the positioning and fixation of tooth shoe are facilitated, so that the assembly of tooth shoe is more convenient, in addition, the fixed structure matched with tooth shoe on stator core can be avoided, the influence on stator core is reduced, and the performance of motor is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a stator assembly and a motor having the same. Background Technology

[0002] Among related technologies, axial motors have gained increasing attention due to their advantages such as compact structure, high efficiency, and high power density. An axial motor consists of a stator and a rotor arranged along the axial direction. The stator includes a stator core and coils wound on the stator core. Permanent magnets are often used in the rotor. The magnetic flux of the stator is usually generated by current, which is conducted through the coils. Pole shoes are used to influence the direction of the magnetic field.

[0003] In related technologies, pole shoes are mounted on the stator, typically using adhesives. These adhesive connections must be designed to withstand the thermal and mechanical loads that occur during motor operation. The pole shoes themselves may also be damaged. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a stator assembly that facilitates the positioning and fixing of the gear shoe, making the assembly of the gear shoe more convenient.

[0005] The present invention also proposes an electric motor, the electric motor comprising the stator assembly described above.

[0006] A stator assembly according to an embodiment of the present invention includes: a plurality of stator cores, the plurality of stator cores being arranged at intervals along the circumferential direction of the stator assembly; a cover plate disposed on one side of the plurality of stator cores along the axial direction of the stator assembly, the cover plate having a fixing groove on the side of the cover plate facing the stator cores; and a toothed shoe, at least a portion of the toothed shoe being inserted into the fixing groove, and at least a portion of the toothed shoe being located between any two adjacent stator cores along the circumferential direction of the stator assembly.

[0007] According to the stator assembly of the present invention, by providing a fixing groove on the side of the cover plate facing the stator core, and allowing at least a portion of the toothed shoe to be inserted into the fixing groove, the positioning and fixing of the toothed shoe is facilitated, making the assembly of the toothed shoe more convenient. In addition, it can avoid setting a fixing structure that cooperates with the toothed shoe on the stator core, reducing the impact on the stator core and ensuring the performance of the motor.

[0008] In some embodiments of the present invention, along the circumferential direction of the stator assembly, the area on the cover plate located between any two adjacent stator cores is a fixed area, and the fixing groove is provided in the fixed area.

[0009] In some embodiments of the present invention, each of the fixed regions is provided with two fixed grooves, which are respectively located at both ends of the fixed region along the circumferential direction of the stator assembly.

[0010] According to some embodiments of the present invention, the cover plate includes: a plate body located on one side of the plurality of stator cores along the axial direction of the stator assembly; and a rib disposed on the side of the plate body facing the stator core and defining the fixing groove together with the plate body.

[0011] In some embodiments of the present invention, the rib includes: a first rib, one end of which is connected to the plate body and the other end of which extends toward the stator core; a second rib, one end of which is connected to the other end of the first rib, the second rib being at an angle to the first rib and spaced apart from the plate body, and at least a portion of the toothed shoe being inserted between the plate body and the second rib.

[0012] In some embodiments of the present invention, when the rib is disposed opposite to the stator core along the axial direction of the stator assembly, the stator core has a relief groove to avoid the rib.

[0013] In some embodiments of the present invention, the plate body and the rib are separate components, and the plate body and the rib are bonded together.

[0014] According to some embodiments of the present invention, the cover plate is a single piece.

[0015] According to some embodiments of the present invention, an adhesive element is provided between the toothed shoe and the inner wall of the fixing groove.

[0016] According to some embodiments of the present invention, the cover plate is provided with a plurality of mounting holes, which are arranged at intervals along the circumferential direction of the stator assembly and correspond one-to-one with a plurality of stator cores, and a portion of the stator core extends into the mounting holes.

[0017] In some embodiments of the present invention, along the axial direction of the stator assembly, the end face of the cover plate opposite to the stator core is flush with the end face of the stator core located in the mounting hole.

[0018] In some embodiments of the present invention, the stator core includes: a core body located on one side of the cover plate along the axial direction of the stator assembly and abutting against the cover plate; and a protrusion located at one end of the core body along the axial direction of the stator assembly and within the mounting hole.

[0019] According to some embodiments of the present invention, a toothed shoe is provided between any two adjacent stator cores along the circumferential direction of the stator assembly. The toothed shoe includes a first tooth, a second tooth, and a first connecting portion. Along the circumferential direction of the stator assembly, the first tooth and the second tooth are spaced apart and form a slot between them. The first connecting portion is located between the first tooth and the second tooth and its two ends are respectively connected to the radially outer ends of the first tooth and the second tooth along the radial direction of the stator assembly.

[0020] In some embodiments of the present invention, the width of the slot remains constant along the length of the slot; and / or, the slot extends along the length direction of the toothed shoe or forms an acute angle with the length direction of the toothed shoe; and / or, in the direction from one end of the first tooth to the other end of the first connecting portion, the width of the first tooth in the circumferential direction of the stator assembly remains constant, gradually decreases, or gradually increases; and / or, in the direction from one end of the second tooth to the other end of the first connecting portion, the width of the second tooth in the circumferential direction of the stator assembly remains constant, gradually decreases, or gradually increases; and / or, the first tooth and the second tooth are symmetrically or asymmetrically arranged; and / or, along the radial direction of the stator assembly, the width of the toothed shoe in the circumferential direction of the stator assembly remains constant.

[0021] According to some embodiments of the present invention, there are multiple toothed shoes, each corresponding to one of the multiple stator cores. Each toothed shoe includes a third tooth, a fourth tooth, and a second connecting portion. Along the circumferential direction of the stator assembly, the third tooth and the fourth tooth are respectively located on both sides of one of the stator cores. The second connecting portion is located on the radially outer side of the stator core along the radial direction of the stator assembly, and its two ends are respectively connected to the radially outer ends of the third tooth and the fourth tooth along the radial direction of the stator assembly.

[0022] In some embodiments of the present invention, the third and fourth teeth between two adjacent stator cores are spaced apart or spliced ​​together along the circumferential direction of the stator assembly.

[0023] According to some embodiments of the present invention, the toothed shoe includes a plurality of teeth, and one of the teeth is provided between any two adjacent stator cores along the circumferential direction of the stator assembly, and the teeth have no groove structure.

[0024] In some embodiments of the present invention, the toothed shoe further includes a third connecting portion, wherein any two adjacent teeth are connected at their radially outer ends along the radial direction of the stator assembly along the circumferential direction of the stator assembly through the third connecting portion, and the third connecting portion is located on the outer side of the corresponding stator core along the radial direction of the stator assembly.

[0025] According to some embodiments of the present invention, there are two cover plates, which are respectively disposed on both sides of the plurality of stator cores along the axial direction of the stator assembly.

[0026] The motor according to an embodiment of the present invention includes the stator assembly described above.

[0027] According to the present invention, the motor is equipped with the above-mentioned stator assembly. A fixing groove is provided on the side of the cover plate facing the stator core, and at least part of the tooth shoe is inserted into the fixing groove, which facilitates the positioning and fixing of the tooth shoe and makes the assembly of the tooth shoe more convenient. In addition, it can avoid setting a fixing structure that cooperates with the tooth shoe on the stator core, reduce the impact on the stator core, and ensure the performance of the motor.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 This is a perspective view of a stator assembly according to an embodiment of the present invention;

[0031] Figure 2 This is a perspective view of the stator core and cover plate of the stator assembly according to an embodiment of the present invention;

[0032] Figure 3 This is a perspective view of the stator core of the stator assembly according to an embodiment of the present invention;

[0033] Figure 4 This is a top view of the stator core of the stator assembly according to an embodiment of the present invention;

[0034] Figure 5 This is a bottom view of the stator core of the stator assembly according to an embodiment of the present invention;

[0035] Figure 6 This is a perspective view of the stator core of the stator assembly according to an embodiment of the present invention;

[0036] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0037] Figure 8 This is a cross-sectional view of the stator core and cover plate of the stator assembly according to an embodiment of the present invention;

[0038] Figure 9 yes Figure 8 Enlarged view of point B in the middle;

[0039] Figure 10 A perspective view of a plurality of toothed shoes of a stator assembly according to Embodiment 1 of the present invention;

[0040] Figure 11 A perspective view of a toothed shoe of a stator assembly according to Embodiment 1 of the present invention;

[0041] Figure 12 This is an assembly diagram of the cover plate and toothed shoe of the stator assembly according to Embodiment 1 of the present invention;

[0042] Figure 13 yes Figure 12 Enlarged view of point C in the middle;

[0043] Figure 14 A perspective view of the cover plate, stator core, and gear shoe of the stator assembly according to Embodiment 1 of the present invention;

[0044] Figure 15 A perspective view of multiple toothed shoes of a stator assembly according to Embodiment 2 of the present invention;

[0045] Figure 16 A perspective view of a toothed shoe of a stator assembly according to Embodiment 2 of the present invention;

[0046] Figure 17 A perspective view of the cover plate, stator core, and gear shoe of the stator assembly according to Embodiment 2 of the present invention;

[0047] Figure 18 A perspective view of a plurality of toothed shoes of a stator assembly according to Embodiment 3 of the present invention;

[0048] Figure 19 A perspective view of a toothed shoe of a stator assembly according to Embodiment 4 of the present invention;

[0049] Figure 20 A perspective view of a toothed shoe of a stator assembly according to Embodiment 5 of the present invention.

[0050] Figure label:

[0051] 100. Stator assembly;

[0052] 1. Stator core; 11. Core body; 111. Clearance groove; 12. Protrusion;

[0053] 2. Cover plate; 21. Fixing area; 22. Fixing groove; 23. Plate body; 24. Rib; 241. First rib; 242. Second rib; 25. Mounting hole;

[0054] 3. Toothed shoe; 31. First tooth; 32. Second tooth; 33. First connecting part; 34. Groove; 35. Third tooth; 36. Fourth tooth; 37. Second connecting part; 38. Tooth; 39. Third connecting part;

[0055] 4. Coil. Detailed Implementation

[0056] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0057] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] The following is for reference. Figures 1-20 A stator assembly 100 according to an embodiment of the present invention is described.

[0060] like Figure 1 and Figure 2 As shown, for reference Figure 14 and Figure 17 According to an embodiment of the present invention, the stator assembly 100 includes a plurality of stator cores 1, a cover plate 2, and a toothed shoe 3.

[0061] Specifically, multiple stator cores 1 are arranged at intervals along the circumferential direction of the stator assembly 100. The stator assembly 100 also includes multiple coils 4, each corresponding to one of the stator cores 1, with each coil 4 sleeved on its corresponding stator core 1. A cover plate 2 is located on one side of the multiple stator cores 1 along the axial direction of the stator assembly 100, and the cover plate 2 can be used to fix the multiple stator cores 1. Additionally, as... Figures 5-7 As shown, the cover plate 2 has a fixing groove 22 on the side facing the stator core 1, and at least a portion of the toothed shoe 3 is inserted into the fixing groove 22. Along the circumferential direction of the stator assembly 100, at least a portion of the toothed shoe 3 is between any two adjacent stator cores 1.

[0062] In this application, the toothed shoe 3 is fixed to the cover plate 2, which avoids the need for a structure on the stator core 1 that mates with the toothed shoe 3, reducing the impact on the stator core 1 and ensuring the performance of the motor. The cover plate 2 is provided with a fixing groove 22, and the toothed shoe 3 and the cover plate 2 mate through the fixing groove 22, making the toothed shoe 3 easier to position and fix, and making assembly more convenient. In addition, the presence of the toothed shoe 3 can block the open slot between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100, which can make the open slot between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100 a semi-open slot or a closed slot. The change of magnetic flux at the slot opening can be adjusted by adjusting the structure of the toothed shoe 3, thereby optimizing pulsation and NVH (Noise, Vibration, Harshness) performance.

[0063] According to the stator assembly 100 of the present invention, by providing a fixing groove 22 on the side of the cover plate 2 facing the stator core 1, and by inserting at least a portion of the toothed shoe 3 into the fixing groove 22, the positioning and fixing of the toothed shoe 3 is facilitated, making the assembly of the toothed shoe 3 more convenient. In addition, it can avoid setting a fixing structure that cooperates with the toothed shoe 3 on the stator core 1, reducing the impact on the stator core 1 and ensuring the performance of the motor.

[0064] In some embodiments of the present invention, such as Figures 5-7 As shown, along the circumferential direction of the stator assembly 100, the area on the cover plate 2 located between any two adjacent stator cores 1 is the fixed area 21, and the fixed groove 22 is provided in the fixed area 21. This facilitates the fixing of the toothed shoe 3 between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100, ensuring the reliability of the toothed shoe 3 fixing.

[0065] Furthermore, such as Figures 5-7As shown, each fixed area 21 is provided with two fixing grooves 22. Along the circumferential direction of the stator assembly 100, the two fixing grooves 22 are respectively located at both ends of the fixed area 21. Each fixing groove 22 extends from the outer end of the cover plate 2 along the radial direction of the stator assembly 100 to the inner end. The openings of the two fixing grooves 22 in the same fixed area 21 face each other, and the toothed shoe 3 can be fixed between the inner walls of the two fixing grooves 22 facing each other. This simplifies the structure of the cover plate 2 and improves the reliability of fixing the toothed shoe 3.

[0066] In addition, such as Figure 6 and Figure 7 As shown, the two ends of the fixing groove 22 are open in the length direction. When the toothed shoe 3 is assembled, the toothed shoe 3 can be inserted from the end of the cover plate 2 away from the center of the cover plate 2.

[0067] In some embodiments of the present invention, such as Figures 7-9 As shown, the cover plate 2 includes a plate body 23 and a rib 24. The plate body 23 is located on one side of the plurality of stator cores 1 along the axial direction of the stator assembly 100. The plate body 23 can be a circular plate structure. The rib 24 is located on the side of the plate body 23 facing the stator core 1 and together with the plate body 23 defines a fixing groove 22. It can be understood that the fixing groove 22 is defined by the surface of the plate body 23 facing the stator core 1 along the axial direction of the stator assembly 100 and the rib 24. This avoids the need to dig a groove in the plate body 23, facilitates the processing of the plate body 23, ensures the structural strength of the plate body 23, and facilitates the assembly of the toothed shoe 3.

[0068] Of course, the present invention is not limited to this, and the fixing groove 22 can also be formed by cutting a groove on the plate body 23.

[0069] Furthermore, such as Figures 7-9 As shown, the rib 24 includes a first rib 241 and a second rib 242. One end of the first rib 241 is connected to the plate body 23, and the other end extends toward the stator core 1. One end of the second rib 242 is connected to the other end of the first rib 241. The second rib 242 and the first rib 241 are at an angle to each other and spaced apart from the plate body 23. At least a portion of the toothed shoe 3 is inserted between the plate body 23 and the second rib 242. Figure 9 In the example shown, the first rib 241 is perpendicular to the plate body 23, and the second rib 242 is perpendicular to the first rib 241 and parallel to the plate body 23. A fixing groove 22 is formed between the second rib 242 and the plate body 23. The first rib 241 can position and fix the gear shoe 3 in the circumferential direction of the stator assembly 100, and the second rib 242 and the plate body 23 can position and fix the gear shoe 3 in the axial direction of the stator assembly 100, thereby improving the reliability of fixing the gear shoe 3.

[0070] In some embodiments of the present invention, such as Figure 8 and Figure 9 As shown, along the axial direction of the stator assembly 100, when the rib 24 is arranged opposite to the stator core 1, the stator core 1 has a clearance groove 111 to avoid the rib 24. This can prevent the stator core 1 from being further away from the rotor due to the arrangement of the rib 24, thereby avoiding an increase in the air gap and ensuring the performance of the motor.

[0071] Optionally, the plate body 23 and the rib 24 are separate components, and are bonded together. The plate body 23 can be injection molded, and the rib 24 can be injection molded separately. The rib 24 and the plate body 23 can be fixed with epoxy resin, simplifying the process.

[0072] Of course, the present invention is not limited to this. The cover plate 2 is an integral part, for example, it can be an integral injection molded part, that is, the plate body 23 and the rib 24 are integrally injection molded, thereby the fixing groove 22 can be made into the required shape, and the process is simple.

[0073] Optionally, the stator core 1 and the toothed shoe 3 are molded from soft magnetic composite material. The toothed shoe 3 can be made into various shapes to match the toothed shoe groove, and the process is simple.

[0074] In some embodiments of the present invention, an adhesive is provided between the toothed shoe 3 and the inner wall of the fixing groove 22. This allows the toothed shoe 3 to be completely fixed within the fixing groove 22, preventing it from shaking or coming off. The adhesive can be epoxy resin. After the toothed shoe 3 is assembled into the fixing groove 22, epoxy resin can be added to completely fix the toothed shoe 3 within the fixing groove 22. The toothed shoe 3 is fixed in the fixing groove 22 by the fit between the toothed shoe 3 and the epoxy resin, making the operation simple and secure.

[0075] In some embodiments of the present invention, such as Figures 2-4 As shown, the cover plate 2 has multiple mounting holes 25, which are spaced apart along the circumferential direction of the stator assembly 100 and correspond one-to-one with multiple stator cores 1. Parts of the stator core 1 extend into the corresponding mounting hole 25. The multiple mounting holes 25 can position the multiple stator cores 1.

[0076] exist Figure 5 In the example shown, the ribs 24 are provided on both sides of the mounting hole 25 along the circumferential direction of the stator assembly 100. The surface of the ribs 24 facing the mounting hole 25 is flush with the inner wall of the mounting hole 25. Specifically, the wall surface of the first rib 241 facing the mounting hole 25 is flush with the inner wall of the mounting hole 25, and the opening of the fixing groove 22 is set away from the mounting hole 25.

[0077] Furthermore, along the axial direction of the stator assembly 100, the end face of the cover plate 2 facing away from the stator core 1 is flush with the end face of the stator core 1 located within the mounting hole 25. This ensures that the cover plate 2 does not occupy the air gap space, preventing the air gap from increasing and guaranteeing the performance of the motor.

[0078] In some embodiments of the present invention, such as Figure 3 and Figure 9 As shown, the stator core 1 includes a core body 11 and a protrusion 12. The core body 11 is located on one side of the cover plate 2 along the axial direction of the stator assembly 100 and abuts against the cover plate 2. The protrusion 12 is located at one end of the core body 11 along the axial direction of the stator assembly 100 and is located within the mounting hole 25. The shape of the protrusion 12 can be the same as the shape of the mounting hole 25, and the size of the protrusion 12 can be the same as the size of the mounting hole 25. Along the circumferential direction of the protrusion 12, at least a portion of the core body 11 protrudes outward from the protrusion 12, so that the end face of the core body 11 along the axial direction of the stator assembly 100 abuts against the end face of the cover plate 2 facing the core body 11, which facilitates the positioning of the stator core 1.

[0079] exist Figure 3 and Figure 9 In the example shown, both ends of the protrusion 12 along the circumferential direction of the stator assembly 100 are recessed into the end face of the corresponding iron core body 11. The protrusion 12 extends into the mounting hole 25. Further, the iron core body 11 has relief grooves 111 on the surface of both ends of the stator assembly 100 facing the cover plate 2 along the axial direction. The walls of the two relief grooves 111 close to each other are flush with the two walls of the protrusion 12. The mounting hole 25 has ribs 24 on both sides along the circumferential direction of the stator assembly 100. The ribs 24 protrude towards the iron core body 11 and fit and abut against the wall of the relief groove 111 opposite to the cover plate 2.

[0080] It is understandable that when the rib 24 and the core body 11 are offset in the axial direction of the stator assembly 100, there is no need to provide a relief groove 111 on the core body 11, and the end face of the core body 11 facing the cover plate 2 directly abuts against the plate body 23 of the cover plate 2.

[0081] Optionally, in the direction of radial inward movement of the cover plate 2 along the stator assembly 100, the width of the mounting hole 25 gradually decreases along the circumferential direction of the stator assembly 100, and the mounting hole 25 is formed as a wedge-shaped hole.

[0082] In some embodiments of the present invention, such as Figure 1 , Figure 2 and Figure 9As shown, there are two cover plates 2, which are respectively disposed on both sides of multiple stator cores 1 along the axial direction of the stator assembly 100. The two cover plates 2 can have identical structures and be symmetrically arranged. Each cover plate 2 has a fixing groove 22 on the side facing the stator core 1, and a toothed shoe 3 is fixed in each fixing groove 22. Both ends of the stator core 1 along the axial direction of the stator assembly 100 have protrusions 12, which extend into the corresponding mounting holes 25 of the two cover plates 2. This allows for better fixation of the stator core 1.

[0083] The following description is for reference. Figures 1-9 The assembly process of the stator assembly 100 according to an embodiment of the present invention is described.

[0084] One of the cover plates 2 is placed at the bottom. The protrusions 12 at one axial end of multiple stator cores 1 are respectively inserted into multiple mounting holes 25 of the lower cover plate 2, and the multiple stator cores 1 are positioned and pre-installed on the lower cover plate 2. After multiple coils 4 are wound and formed, they are respectively fitted into multiple nail cores for easy operation. Then, the multiple mounting holes 25 of the other cover plate 2 are aligned with the protrusions 12 at the upper end of multiple stator cores 1 for installation. The protrusions 12 at the upper end of multiple stator cores 1 are respectively inserted into the multiple mounting holes 25 of the upper cover plate 2. Finally, the toothed shoes 3 are inserted one by one into the fixing grooves 22. Epoxy resin can be added to completely fix the toothed shoes 3 in the fixing grooves 22.

[0085] In some embodiments of the present invention, such as Figures 10-13 , Figure 19 and Figure 20 As shown, along the circumferential direction of the stator assembly 100, a toothed shoe 3 is provided between any two adjacent stator cores 1. The toothed shoe 3 includes a first tooth 31, a second tooth 32, and a first connecting portion 33. Along the circumferential direction of the stator assembly 100, the first tooth 31 and the second tooth 32 are spaced apart and form a slot 34 between them. The first connecting portion 33 is located between the first tooth 31 and the second tooth 32, and its two ends are respectively connected to the radially outer ends of the first tooth 31 and the second tooth 32 along the radial direction of the stator assembly 100. It can be understood that the toothed shoe 3 can be formed as a U-shape with its opening facing the center of the stator assembly 100, and a toothed shoe 3 is provided between any two adjacent stator cores 1 along the circumferential direction of the stator assembly 100.

[0086] In this application, the aforementioned toothed shoe 3 can make the open slot between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100 become a semi-open slot. The change of slot magnetic flux can be adjusted by adjusting the shape of the first tooth 31 and the second tooth 32, as well as adjusting the shape and extension direction of the slot 34.

[0087] For example, in Figure 12 and Figure 13In the example shown, the cover plate 2 fixing area 21 is provided with fixing grooves 22 at both ends along the circumferential direction of the stator assembly 100. The openings of the two fixing grooves 22 face each other, and the ends of the first tooth 31 and the second tooth 32 that are opposite to each other are respectively inserted into the two fixing grooves 22.

[0088] Optionally, such as Figure 11 , Figure 19 and Figure 20 As shown, the width of the slot 34 remains unchanged along the length of the slot 34, which simplifies the machining process of the toothed shoe 3 and improves production efficiency.

[0089] Optionally, such as Figure 11 As shown, the slot 34 extends along the length of the toothed shoe 3. Figure 19 and Figure 20 As shown, an acute angle is formed between the slot 34 and the length direction of the toothed shoe 3.

[0090] Optionally, in the direction from one end of the first tooth 31 to the other end of the first connecting portion 33, the width of the first tooth 31 in the circumferential direction of the stator assembly 100 remains constant, gradually decreases, or gradually increases. For example, in Figure 11 and Figure 19 In the example shown, the width of the first tooth 31 remains constant in the circumferential direction of the stator assembly 100, from one end to the other in the direction between the first tooth 31 and the first connecting portion 33; Figure 20 In the example shown, the width of the first tooth 31 gradually increases along the circumferential direction of the stator assembly 100 in the direction from one end to the other of the first tooth 31 and the first connecting portion 33.

[0091] Optionally, in the direction from one end of the second tooth 32 to the other end of the first connecting portion 33, the width of the second tooth 32 along the circumferential direction of the stator assembly 100 remains constant, gradually decreases, or gradually increases. For example, in Figure 11 and Figure 19 In the example shown, the width of the second tooth 32 remains constant in the circumferential direction of the stator assembly 100, from one end of the second tooth 32 to the other end of the first connecting portion 33; Figure 20 In the example shown, the width of the second tooth 32 gradually decreases along the circumferential direction of the stator assembly 100 in the direction from one end to the other of the first connecting portion 33.

[0092] Optionally, the first tooth 31 and the second tooth 32 are arranged symmetrically or asymmetrically, for example, in Figure 11 In the example shown, the first tooth 31 and the second tooth 32 are symmetrically arranged; in Figure 19 and Figure 20 In the example shown, the first tooth 31 and the second tooth 32 are arranged asymmetrically.

[0093] Optionally, the width of the toothed shoe 3 in the circumferential direction of the stator assembly 100 remains unchanged along the radial direction of the stator assembly 100.

[0094] It is understood that in this application, the shape and extension direction of the slot 34, as well as the shape of the first tooth 31 and the second tooth 32, can be adjusted according to the magnetic flux.

[0095] The toothed boot 3 structure according to three embodiments of the present invention is described in detail below.

[0096] exist Figure 11 In the example shown, the toothed shoe 3 is located between two adjacent stator cores 1 and includes a first tooth 31, a second tooth 32 and a first connecting portion 33. Along the circumferential direction of the stator assembly 100, the first tooth 31 and the second tooth 32 are spaced apart and form a slot 34 between them. The first connecting portion 33 is located between the first tooth 31 and the second tooth 32 and its two ends are respectively connected to the radial outer ends of the first tooth 31 and the second tooth 32 along the radial direction of the stator assembly 100.

[0097] The first tooth 31 and the second tooth 32 are symmetrically arranged. In the direction from one end of the first tooth 31 to the other end of the first connecting portion 33, the width of the first tooth 31 in the circumferential direction of the stator assembly 100 remains constant. Similarly, in the direction from one end of the second tooth 32 to the other end of the first connecting portion 33, the width of the second tooth 32 in the circumferential direction of the stator assembly 100 remains constant. Furthermore, the widths of the first tooth 31 and the second tooth 32 located at the same radial position in the stator assembly 100 are the same. The slot 34 extends along the length of the toothed shoe 3, and its width remains constant along its length.

[0098] exist Figure 19 In the example shown, the toothed shoe 3 is located between two adjacent stator cores 1 and includes a first tooth 31, a second tooth 32 and a first connecting portion 33. Along the circumferential direction of the stator assembly 100, the first tooth 31 and the second tooth 32 are spaced apart and form a slot 34 between them. The first connecting portion 33 is located between the first tooth 31 and the second tooth 32 and its two ends are respectively connected to the radial outer ends of the first tooth 31 and the second tooth 32 along the radial direction of the stator assembly 100.

[0099] The first tooth 31 and the second tooth 32 are asymmetrically arranged. In the direction from one end of the first tooth 31 to the other end of the first connecting portion 33, the width of the first tooth 31 along the circumferential direction of the stator assembly 100 remains constant. Similarly, in the direction from one end of the second tooth 32 to the other end of the first connecting portion 33, the width of the second tooth 32 along the circumferential direction of the stator assembly 100 remains constant. Furthermore, the widths of the first tooth 31 and the second tooth 32 located at the same radial position on the stator assembly 100 are different. The slot 34 extends along the length of the toothed shoe 3, and its width remains constant along its length.

[0100] exist Figure 20 In the example shown, the toothed shoe 3 is located between two adjacent stator cores 1 and includes a first tooth 31, a second tooth 32 and a first connecting portion 33. Along the circumferential direction of the stator assembly 100, the first tooth 31 and the second tooth 32 are spaced apart and form a slot 34 between them. The first connecting portion 33 is located between the first tooth 31 and the second tooth 32 and its two ends are respectively connected to the radial outer ends of the first tooth 31 and the second tooth 32 along the radial direction of the stator assembly 100.

[0101] The first tooth 31 and the second tooth 32 are asymmetrically arranged. In the direction from one end of the first tooth 31 to the other end of the first connecting portion 33, the width of the first tooth 31 gradually increases along the circumferential direction of the stator assembly 100. Similarly, in the direction from one end of the second tooth 32 to the other end of the first connecting portion 33, the width of the second tooth 32 gradually decreases along the circumferential direction of the stator assembly 100. An acute angle is formed between the slot 34 and the length direction of the toothed shoe 3. The width of the slot 34 remains constant along its length.

[0102] In other embodiments of the invention, such as Figures 15-17 As shown, there are multiple toothed shoes 3, each corresponding one-to-one with a stator core 1. Each toothed shoe 3 includes a third tooth 35, a fourth tooth 36, and a second connecting portion 37. Along the circumferential direction of the stator assembly 100, the third tooth 35 and the fourth tooth 36 are located on opposite sides of one stator core 1. The second connecting portion 37 is located radially outward of the stator core 1 along the radial direction of the stator assembly 100, and its two ends are respectively connected to the radially outward ends of the third tooth 35 and the fourth tooth 36 along the radial direction of the stator assembly 100. It can be understood that the toothed shoes 3 can be formed in a U-shape with the opening facing the center of the stator assembly 100. Along the circumferential direction of the stator assembly 100, two portions of the toothed shoes 3 are provided between any two adjacent stator cores 1, namely, the third tooth 35 of one toothed shoe 3 and the fourth tooth 36 of the other toothed shoe 3. In this application, the second connecting portion 37 bypasses the outer edge of the stator core 1, which can reduce magnetic leakage.

[0103] For example, in Figure 17 In the example shown, the cover plate 2 fixing area 21 is provided with fixing grooves 22 at both ends along the circumferential direction of the stator assembly 100. The openings of the two fixing grooves 22 face each other. The third tooth 35 of one of the two toothed shoes 3 and the fourth tooth 36 of the other are arranged in the fixing area 21 along the circumferential direction of the stator assembly 100. The ends of the third tooth 35 and the fourth tooth 36 that are opposite to each other in the same fixing area 21 are respectively inserted into the two fixing grooves 22.

[0104] Furthermore, along the circumferential direction of the stator assembly 100, the third tooth 35 and the fourth tooth 36 between two adjacent stator cores 1 are spaced apart or spliced ​​together. When the third tooth 35 and the fourth tooth 36 between two adjacent stator cores 1 are spaced apart, the open slot between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100 can be made into a semi-open slot; when the third tooth 35 and the fourth tooth 36 between two adjacent stator cores 1 are spliced ​​together, the open slot between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100 can be made into a closed slot.

[0105] It is understood that in this application, the open slot can be adjusted to a semi-open slot or a closed slot according to the magnetic flux.

[0106] In some embodiments of the present invention, such as Figure 18 As shown, the toothed shoe 3 includes multiple teeth 38. Along the circumferential direction of the stator assembly 100, a tooth 38 is provided between any two adjacent stator cores 1. The tooth 38 is a single integral structure. The tooth 38 can make the open slot between two adjacent stator cores 1 along the circumferential direction of the stator assembly 100 become a closed slot.

[0107] Furthermore, such as Figure 18 As shown, the toothed shoe 3 also includes a third connecting part 39. Along the circumferential direction of the stator assembly 100, any two adjacent teeth 38 are connected at their radially outer ends along the radial direction of the stator assembly 100 via the third connecting part 39. The third connecting part 39 is located on the radially outer side of the corresponding stator core 1 along the radial direction of the stator assembly 100. This allows multiple teeth 38 to be connected as a whole. In this case, when assembling the teeth 38 and the cover plate 2, the teeth 38 and the cover plate 2 can be integrally injection molded.

[0108] In this application, the cover plate 2 and the toothed shoe 3 are fitted together. The thickness of the cover plate 2 does not affect the air gap of the motor. The components are easy to install and are conducive to fixing and sealing.

[0109] The following describes a motor according to an embodiment of the present invention.

[0110] The motor according to an embodiment of the present invention includes the stator assembly 100 and the rotor described above, wherein the rotor and the stator assembly 100 are arranged along the axial direction of the stator assembly 100.

[0111] According to the embodiment of the present invention, the motor is provided with the stator assembly 100 described above, and a fixing groove 22 is provided on the side of the cover plate 2 facing the stator core 1, so that at least part of the tooth shoe 3 is inserted into the fixing groove 22, which facilitates the positioning and fixing of the tooth shoe 3, makes the assembly of the tooth shoe 3 more convenient, and avoids the need to provide a fixing structure that cooperates with the tooth shoe 3 on the stator core 1, reducing the impact on the stator core 1 and ensuring the performance of the motor.

[0112] Other configurations and operations of the motor according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0114] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that, include: Multiple stator cores (1) are arranged at intervals along the circumferential direction of the stator assembly (100); Cover plate (2), the cover plate (2) is disposed on one side of the plurality of stator cores (1) along the axial direction of the stator assembly (100), and the side of the cover plate (2) facing the stator core (1) has a fixing groove (22); Toothed shoe (3), at least a portion of which is inserted into the fixing groove (22) along the circumferential direction of the stator assembly (100), at least a portion of which is between any two adjacent stator cores (1).

2. The stator assembly according to claim 1, characterized in that, Along the circumferential direction of the stator assembly (100), the area on the cover plate (2) between any two adjacent stator cores (1) is a fixed area (21), and the fixed groove (22) is provided in the fixed area (21).

3. The stator assembly according to claim 2, characterized in that, Each of the fixed regions (21) is provided with two fixed slots (22), which are respectively located at both ends of the fixed region (21) along the circumferential direction of the stator assembly (100).

4. The stator assembly according to claim 1, characterized in that, The cover plate (2) includes: Plate body (23), the plate body (23) is located on one side of the plurality of stator cores (1) along the axial direction of the stator assembly (100); The rib (24) is provided on the side of the plate body (23) facing the stator core (1) and together with the plate body (23) defines the fixing groove (22).

5. The stator assembly according to claim 4, characterized in that, The rib (24) includes: The first protruding rib (241) has one end connected to the plate body (23) and the other end extending toward the stator core (1); The second rib (242) has one end connected to the other end of the first rib (241), the second rib (242) and the first rib (241) are at an angle to each other and spaced apart from the plate body (23), and at least part of the toothed shoe (3) is inserted between the plate body (23) and the second rib (242).

6. The stator assembly according to claim 4, characterized in that, Along the axial direction of the stator assembly (100), when the rib (24) is disposed opposite to the stator core (1), the stator core (1) has a relief groove (111) that avoids the rib (24).

7. The stator assembly according to claim 4, characterized in that, The plate body (23) and the rib (24) are separate parts, and the plate body (23) and the rib (24) are bonded together.

8. The stator assembly according to claim 1, characterized in that, The cover plate (2) is a single piece.

9. The stator assembly according to claim 1, characterized in that, An adhesive piece is provided between the toothed shoe (3) and the inner wall of the fixing groove (22).

10. The stator assembly according to claim 1, characterized in that, The cover plate (2) is provided with a plurality of mounting holes (25). The plurality of mounting holes (25) are arranged at intervals along the circumferential direction of the stator assembly (100) and correspond one-to-one with the plurality of stator cores (1). A portion of the stator core (1) extends into the mounting hole (25).

11. The stator assembly according to claim 10, characterized in that, Along the axial direction of the stator assembly (100), the end face of the cover plate (2) facing away from the stator core (1) is flush with the end face of the stator core (1) located in the mounting hole (25).

12. The stator assembly according to claim 10, characterized in that, The stator core (1) includes: The core body (11) is located on one side of the cover plate (2) along the axial direction of the stator assembly (100) and abuts against the cover plate (2); A protrusion (12) is provided at one end of the core body (11) along the axial direction of the stator assembly (100) and located in the mounting hole (25).

13. The stator assembly according to claim 1, characterized in that, Along the circumferential direction of the stator assembly (100), a toothed shoe (3) is provided between any two adjacent stator cores (1), the toothed shoe (3) comprising: The first tooth (31), the second tooth (32), and the first connecting portion (33) are arranged along the circumferential direction of the stator assembly (100). The first tooth (31) and the second tooth (32) are spaced apart and form a slot (34) between them. The first connecting portion (33) is located between the first tooth (31) and the second tooth (32) and its two ends are respectively connected to the radial outer ends of the first tooth (31) and the second tooth (32) along the radial direction of the stator assembly (100).

14. The stator assembly according to claim 13, characterized in that, The width of the slot (34) remains unchanged along the length of the slot (34); And / or, the slot (34) extends along the length direction of the toothed shoe (3) or forms an acute angle with the length direction of the toothed shoe (3); And / or, in the direction from one end of the first tooth (31) to the other end of the first connecting portion (33), the width of the first tooth (31) along the circumferential direction of the stator assembly (100) remains constant, gradually decreases, or gradually increases; And / or, in the direction from one end of the second tooth (32) to the other end of the first connecting portion (33), the width of the second tooth (32) along the circumferential direction of the stator assembly (100) remains constant, gradually decreases, or gradually increases; And / or, the first tooth (31) and the second tooth (32) are arranged symmetrically or asymmetrically; And / or, along the radial direction of the stator assembly (100), the width of the toothed shoe (3) along the circumferential direction of the stator assembly (100) remains unchanged.

15. The stator assembly according to claim 1, characterized in that, The toothed shoe (3) is multiple and corresponds one-to-one with the multiple stator cores (1). The toothed shoe (3) includes: The third tooth (35), the fourth tooth (36), and the second connecting part (37) are located along the circumferential direction of the stator assembly (100). The third tooth (35) and the fourth tooth (36) are located on both sides of a stator core (1). The second connecting part (37) is located on the radial outer side of the stator core (1) along the radial direction of the stator assembly (100) and its two ends are respectively connected to the radial outer ends of the third tooth (35) and the fourth tooth (36) along the radial direction of the stator assembly (100).

16. The stator assembly according to claim 15, characterized in that, Along the circumferential direction of the stator assembly (100), the third tooth (35) and the fourth tooth (36) between two adjacent stator cores (1) are spaced apart or spliced ​​together.

17. The stator assembly according to claim 1, characterized in that, The toothed shoe (3) includes a plurality of teeth (38). Along the circumferential direction of the stator assembly (100), a tooth (38) is provided between any two adjacent stator cores (1). The tooth (38) has no groove structure.

18. The stator assembly according to claim 17, characterized in that, The toothed shoe (3) further includes a third connecting part (39). Along the circumferential direction of the stator assembly (100), any two adjacent teeth (38) are connected at their radial outer ends along the radial direction of the stator assembly (100) through the third connecting part (39). The third connecting part (39) is located on the outer side of the corresponding stator core (1) along the radial direction of the stator assembly (100).

19. The stator assembly according to any one of claims 1-18, characterized in that, There are two cover plates (2), and the two cover plates (2) are respectively disposed on both sides of the multiple stator cores (1) along the axial direction of the stator assembly (100).

20. An electric motor, characterized in that, include: Stator assembly (100) according to any one of claims 1-19; The rotor and the stator assembly (100) are arranged along the axial direction of the stator assembly (100).

Images