Stator structure and brushless motor

Abstract

The utility model relates to the technical field of motors, and discloses a stator structure and a brushless motor, and the stator structure comprises a stator core, an insulation assembly and a winding. The insulating component is sleeved on the stator core and is attached to the end surface of the stator core; the winding comprises a wire passing part and a coil part wound on the insulating component; wherein the end face, close to the stator iron core, of the insulating assembly extends to form a convex part, and the wire passing part is distributed along the convex part and connected with an external circuit board, so that the winding is insulated from the stator iron core. According to the stator structure, the problems of electric leakage and poor voltage resistance caused by contact between the wire passing part and the peripheral wall of the stator core when the wire passing part is deformed and loosened are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator structure and a brushless motor. Background Art

[0002] A brushless motor is a brushless permanent magnet DC motor that achieves motor commutation through electronic control without the need for mechanical brushes and commutators. Compared with brushed motors, brushless motors have higher efficiency, longer life, lower noise and higher operating speed. The working principle of a brushless DC motor is based on the principles of electromagnetic induction and Lorentz force. When current passes through the stator coil, a rotating magnetic field is generated. The permanent magnet in the rotor is subjected to the Lorentz force in this rotating magnetic field, causing the rotor to rotate following the stator magnetic field. The controller achieves motor commutation by controlling the current and magnetic field. Brushless motors have advantages in many applications, such as high efficiency, low noise, high speed and high torque. They are widely used in electric vehicles, home appliances, industrial equipment, aerospace and other fields.

[0003] Existing brushless motors require enameled wire to be wound one-to-one around multiple winding bobbins inside the stator core to form multiple coils. When the coils are energized, the stator generates a rotating magnetic field, which in turn drives the rotor. In existing technology, insulation requirements are typically met by installing an insulating assembly between the stator core and the coils. After the enameled wire has been wound around the insulating assembly for one coil, it is then wound along the outer periphery of the insulating assembly to a lead portion, which is then connected to an external circuit board. However, since the enameled wire is soft, it can easily deform and loosen, causing contact with the outer periphery of the stator core, leading to leakage and poor voltage resistance. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the present invention provides a stator structure to prevent the wire-passing portion from contacting the outer peripheral wall of the stator core when it is deformed and loose, thereby preventing leakage and poor voltage resistance.

[0005] The technical effects to be achieved by the present invention are achieved through the following aspects:

[0006] In a first aspect, the present invention provides a stator structure, comprising:

[0007] stator core;

[0008] an insulating assembly, sleeved on the stator core and fitted with an end surface of the stator core; and

[0009] The winding comprises a wire-passing portion and a coil portion wound on the insulating assembly, wherein the wire-passing portion is conductively connected to the coil portion;

[0010] The insulating component has a convex portion extending from the end surface of the stator core, and the wire-passing portion is distributed along the convex portion and connected to an external circuit board to insulate the winding from the stator core.

[0011] In some implementations, the protrusion is disposed along a circumference of the insulating assembly;

[0012] Alternatively, the protrusion is arranged along the circumference of the end surface of the stator core.

[0013] In this implementation, the wire passing portion is distributed as a whole on the convex portion when it is wound around the outer peripheral wall of the insulating assembly, avoiding contact between the wire passing portion and the outer peripheral wall of the stator core when part of the wire passing portion is deformed, thereby enhancing the insulation effect.

[0014] In some implementations, an outer peripheral wall of the protrusion is coaxial with an outer peripheral wall of the stator core.

[0015] In some implementations, the inner wall of the stator core is provided with tooth slots, and the tooth slots are connected to both end surfaces of the stator core;

[0016] The insulating assembly includes an annular insulating portion and a slot-shaped insulating portion. The slot-shaped insulating portion is inserted into the tooth slot from one side end surface of the stator core, and the outer wall of the slot-shaped insulating portion is in contact with the inner wall of the tooth slot. The annular insulating portion is connected to the slot-shaped insulating portion and is in contact with the end surface of the stator core. The coil portion is wound on the slot-shaped insulating portion.

[0017] In this implementation, the slot-shaped insulating portion is correspondingly inserted into the tooth slots of the stator core, and the annular insulating portion is attached to the end surface of the stator core to ensure insulation reliability.

[0018] In some implementations, a limiting member is provided at one end of the slot-shaped insulating portion facing away from the annular insulating portion, and the limiting member is staggered with respect to the tooth slot.

[0019] In some implementations, a first guide groove is provided at a connection between the protrusion and the insulating assembly.

[0020] In this implementation, it is convenient to wind the wire passing part, and at the same time it plays a limiting role on the wire passing part, preventing the wire passing part from falling from the protrusion and contacting the outer peripheral wall of the stator core, thereby avoiding leakage and poor voltage resistance.

[0021] In some implementations, the depth of the first guide groove is equal to the diameter of the wire-passing portion.

[0022] In some implementations, the insulation assembly includes a first insulation member and a second insulation member, and the first insulation member and the second insulation member are respectively inserted into the stator core from both side end surfaces of the stator core.

[0023] In some implementations, a snap-fit ​​position is provided at the connection between the first insulating member and the second insulating member, and a snap-fit ​​portion extends from the second insulating member for snapping into the snap-fit ​​position.

[0024] In this implementation, the connection between the first insulating member and the second insulating member is made more stable, thereby achieving a stronger insulation effect.

[0025] In the second aspect, the utility model provides a brushless motor, including a rotor assembly, a housing assembly and a stator structure, wherein the stator core is sleeved on the rotor assembly, and a receiving space for installing the stator core is formed inside the housing assembly; a second guide groove is provided on the outer peripheral wall of the stator core, and a positioning member is provided on the inner peripheral wall of the housing assembly corresponding to the second guide groove.

[0026] In summary, the present invention has at least the following advantages:

[0027] The stator structure provided by the utility model provides a convex portion at the end face of the insulating component close to the stator core, so that the wire passing portion is distributed on the convex portion when it is wound along the outer peripheral wall of the insulating component. The convex portion supports the wire passing portion to prevent the wire passing portion from loosening and falling off; and the spacing distance between the wire passing portion and the stator core is increased to prevent the wire passing portion from contacting the outer peripheral wall of the stator core when it is deformed and loose, thereby preventing the problem of leakage and poor voltage resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the stator structure of Example 1;

[0029] Figure 2 for Figure 1 A schematic structural diagram of the convex portion and the line-crossing portion shown;

[0030] Figure 3 Schematic diagram of the stator structure of Example 2;

[0031] Figure 4 for Figure 3 A schematic cross-sectional view of the insulation assembly shown;

[0032] Figure 5 for Figure 4 A partial enlarged view of the insulating component at point A is shown;

[0033] Figure 6 for Figure 3 A schematic structural diagram of the first insulating member and the second insulating member shown;

[0034] Figure 7 for Figure 6A schematic cross-sectional view of the first insulating member and the second insulating member shown;

[0035] Figure 8 This is a schematic structural diagram of the brushless motor of Example 3.

[0036] Markings in the figure:

[0037] 1. Stator structure;

[0038] 10. stator core; 11. tooth slot; 12. second guide slot;

[0039] 20. Insulating assembly; 21. Protrusion; 211. First guide groove; 22. Ring-shaped insulating portion; 23. Grooved insulating portion; 231. Positioning member; 24. First insulating member; 241. Clamping position; 25. Second insulating member; 251. Clamping portion;

[0040] 30. Winding; 31. Wire passing portion; 32. Coil portion;

[0041] 2. Brushless motor;

[0042] 40. Rotor assembly;

[0043] 50. Housing assembly; 51. Accommodation space; 52. Positioning member;

[0044] 60. Lead part. DETAILED DESCRIPTION

[0045] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1:

[0048] Please see the attached Figure 1 ~Attached Figure 2 The stator structure 1 of the present invention includes a stator core 10 , an insulation assembly 20 and a winding 30 .

[0049] Please combine Figure 1 and Figure 2 , Figure 1The diagram shows the structural relationship between the stator core 10, the insulation assembly 20 and the winding 30 in the embodiment of the present invention. Figure 2 The diagram illustrates the structural relationship between the protrusion 21 and the wire-passing portion 31 in an embodiment of the present invention. Specifically, the insulation assembly 20 is sleeved onto the stator core 10 and abuts against the end face of the stator core 10 to achieve insulation. The winding 30 includes a wire-passing portion 31 and a coil portion 32 wound around the insulation assembly 20, with the wire-passing portion 31 and the coil portion 32 being electrically connected. A protrusion 21 extends from the insulation assembly 20 near the end face of the stator core 10. The wire-passing portions 31 are distributed along the protrusion 21 and connected to an external circuit board, insulating the winding 30 from the stator core 10.

[0050] In this embodiment, the insulation assembly 20 is assembled into the interior of the stator core 10, and the end face of the insulation assembly 20 is attached to the end face of the stator core 10. The wire is wound one by one on the insulation assembly 20 by a winding machine to form a coil portion 32. After the wire is wound to form a coil portion 32, the wire is led out from the interior of the stator core 10 to form a wire pass portion 31. The wire pass portion 31 needs to be wound around the outer peripheral wall of the insulation assembly 20 until the position of the lead portion 60 is located. Then, the lead portion 60 is connected to an external circuit board to energize the coil portion 32, thereby causing the stator structure 1 to generate a magnetic field, further driving the rotor to rotate, and achieving the normal operation of the brushless motor 2. By providing a protrusion 21 at the end face of the insulation assembly 20 near the stator core 10, the wire pass portion 31 is distributed on the protrusion 21 when it is wound along the outer peripheral wall of the insulation assembly 20, thereby increasing the distance between the wire pass portion 31 and the stator core 10, thereby achieving an insulation effect.

[0051] It can be understood that the method of insulating the wire passing portion 31 and the stator core 10 is not limited to providing a protrusion 21 at the end face of the insulating component 20 close to the stator core 10. In some other embodiments, a groove is provided on the peripheral wall of the insulating component 20 on the side opposite to the end face of the stator core 10, and the wire passing portion 31 is wound in the groove to avoid the problem that the wire passing portion 31 is easily deformed and loosened when wound on the outer peripheral wall of the insulating component 20 due to the fact that the wire is a soft wire, resulting in contact with the stator core 10, thereby further avoiding the problem of leakage.

[0052] The above-mentioned stator structure 1 is provided with a protrusion 21 at the end surface of the insulating component 20 close to the stator core 10, so that the wire passing portion 31 is distributed on the protrusion 21 when it is wound along the outer peripheral wall of the insulating component 20. The protrusion 21 supports the wire passing portion 31 to prevent the wire passing portion 31 from loosening and falling off; and increases the spacing distance between the wire passing portion 31 and the stator core 10 to prevent the wire passing portion 31 from contacting the outer peripheral wall of the stator core 10 when it is deformed and loose, thereby causing leakage and poor voltage resistance.

[0053] In some preferred embodiments, the protrusions 21 are arranged along the circumference of the insulation assembly 20; or, the protrusions 21 are arranged along the circumference of the end surface of the stator core 10. This allows the wire feeder 31 to be entirely distributed on the protrusions 21 when it is wound around the outer circumferential wall of the insulation assembly 20, thereby preventing part of the wire feeder 31 from contacting the outer circumferential wall of the stator core 10 when deformed, thereby enhancing the insulation effect.

[0054] Furthermore, the contact surface between the protrusion 21 and the wire-passing portion 31 is smooth and parallel to the end face of the stator core 10. Of course, the contact surface between the protrusion 21 and the wire-passing portion 31 can also be tilted downward toward the insulation assembly 20, forming an angle with the outer wall of the insulation assembly 20, with the wire-passing portion 31 positioned within the angle for better securing. Preferably, the angle can be any value between 30° and 80°.

[0055] Furthermore, the protrusions 21 are arranged in a stepped manner on the circumference of the insulating assembly 20 to provide multiple anti-falling functions for the wire-passing portion 31 , thereby enhancing the insulating effect.

[0056] In some more preferred embodiments, the outer peripheral wall of the protrusion 21 is coaxial with the outer peripheral wall of the stator core 10. This avoids the problem that the protrusion 21 protrudes from the outer peripheral wall of the stator core 10, making it inconvenient to assemble the stator core 10 into the motor housing. It can be understood that the diameter of the wire-passing portion 31 is less than or equal to the contact surface width between the protrusion 21 and the wire-passing portion 31, thereby avoiding the problem that the wire-passing portion 31 protrudes from the protrusion 21, causing it to fall off and / or affecting the assembly of the stator core 10 into the motor housing, further ensuring the reliability of the overall structure and making the overall structure more compact. Of course, it is not limited to the outer peripheral wall of the protrusion 21 being coaxial with the outer peripheral wall of the stator core 10, and the distance from the periphery of the protrusion 21 to the axis center can also be less than the distance from the periphery of the stator core 10 to the axis center. It is only necessary to ensure that the protrusion 21 does not protrude from the outer peripheral wall of the stator core 10.

[0057] Example 2:

[0058] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the stator structure 1 of the utility model. Figure 3 ~Attached Figure 7 .

[0059] Among them, see Figure 3 , Figure 3The diagram illustrates the structural relationship between the stator core 10, the annular insulating portion 22, and the slot-shaped insulating portion 23 in an embodiment of the present invention. Specifically, the inner wall of the stator core 10 is provided with slots 11, which connect the two end surfaces of the stator core 10. The insulating assembly 20 includes an annular insulating portion 22 and a slot-shaped insulating portion 23. The slot-shaped insulating portion 23 is inserted into the slots 11 from one end surface of the stator core 10, with the outer wall of the slot-shaped insulating portion 23 abutting the inner wall of the slot 11. The annular insulating portion 22 is connected to the slot-shaped insulating portion 23 and abuts the end surface of the stator core 10. The coil portion 32 is wound around the slot-shaped insulating portion 23.

[0060] In this embodiment, the slot-shaped insulating portion 23 is inserted into the corresponding slots 11 of the stator core 10, and the annular insulating portion 22 is attached to the end surface of the stator core 10. The insulating assembly 20 covers the stator core 10, preventing the stator core 10 from contacting the coil portion 32 and the wire-passing portion 31, which could lead to leakage. It also enhances the connection stability between the insulating assembly 20 and the stator core 10, thereby improving the reliability of the overall structure. Preferably, the slot-shaped insulating portion 23 is integrally formed with the annular insulating portion 22 to make the overall structure of the insulating assembly 20 more compact and thus enhance the insulation effect.

[0061] In some preferred embodiments, a stopper 231 is provided at the end of the slot-shaped insulating portion 23 facing away from the annular insulating portion 22. The stopper 231 is offset from the tooth slot 11. This prevents the coil portion 32 from falling off the slot-shaped insulating portion 23 and affecting the normal operation of the motor. Specifically, the slot-shaped insulating portion 23 and the tooth slot 11 are each provided with a plurality of stoppers, and the ends of two adjacent insulating portions facing away from the annular insulating portion 22 jointly form a stopper 231.

[0062] In some preferred embodiments, please combine Figure 4 and Figure 5 , Figure 4 and Figure 5 The diagram illustrates the structural relationship between the first guide groove 211 and the protrusion 21 in an embodiment of the present invention. Specifically, the first guide groove 211 is defined at the junction of the protrusion 21 and the insulation assembly 20. This facilitates the winding of the wire guide 31 and also serves as a position limiter for the wire guide 31, preventing it from falling off the protrusion 21 and contacting the outer wall of the stator core 10, thereby preventing leakage and poor withstand voltage.

[0063] In some preferred embodiments, the depth of the first guide groove 211 is equal to the diameter of the wire-passing portion 31. This allows the wire-passing portion 31 to be completely accommodated within the first guide groove 211, improving the overall structural compactness. It also protects the wire-passing portion 31, preventing it from protruding from the first guide groove 211 and rubbing against other components, thereby preventing wear on the wire-passing portion 31.

[0064] In some preferred embodiments, see Figure 6 , Figure 6 The diagram illustrates the structural relationship between the first insulating member 24 and the second insulating member 25 in an embodiment of the present invention. Specifically, the insulating assembly 20 includes the first insulating member 24 and the second insulating member 25, which are respectively inserted into the stator core 10 from the end faces of the stator core 10. This facilitates assembly of the insulating assembly 20 into the stator core 10 and improves assembly efficiency. The first insulating member 24 and the second insulating member 25 are respectively attached to the end faces and inner wall of the stator core 10 to isolate the coil portion 32 from the stator core 10, thereby achieving a good insulation effect.

[0065] In some more preferred embodiments, see Figure 7 , Figure 7 The diagram illustrates the structural relationship between the snap-fit ​​portion 251 and the snap-fit ​​position 241 in an embodiment of the present invention. Specifically, a snap-fit ​​position 241 is provided at the connection between the first insulating member 24 and the second insulating member 25, and the second insulating member 25 extends a snap-fit ​​portion 251 for snapping into the snap-fit ​​position 241. This makes the connection between the first insulating member 24 and the second insulating member 25 more stable, thereby achieving a stronger insulation effect; at the same time, it facilitates the alignment installation between the first insulating component 20 and the second insulating component 20, thereby improving installation efficiency. Moreover, when the first insulating member 24 or the second insulating member 25 is damaged, only one of the insulating members needs to be replaced, thereby reducing production costs. It can be understood that the second insulating member 25 is not limited to being snap-fitted to the first insulating member 24, and can also be connected together by bonding or embedding.

[0066] Example 3:

[0067] This embodiment provides a brushless motor 2 based on the above embodiment. Figure 8 .

[0068] A brushless motor 2 includes a rotor assembly 40 , a housing assembly 50 , and a stator structure 1 .

[0069] Among them, the stator core 10 is sleeved on the rotor assembly 40, and a accommodating space 51 for installing the stator core 10 is formed inside the housing assembly 50; the outer peripheral wall of the stator core 10 is provided with a second guide groove 12, and a positioning member 52 is provided at the inner peripheral wall of the housing assembly 50 corresponding to the second guide groove 12.

[0070] In this embodiment, the stator core 10 is sleeved on the rotor assembly 40, and the winding 30 is energized to generate a rotating magnetic field, which in turn drives the rotor assembly 40 to rotate, thereby realizing the rotation of the brushless motor 2. The housing assembly 50 protects the stator core 10, preventing the stator core 10 from being scratched by external components, which may cause malfunctions, and at the same time makes the overall structure more compact. When assembling the brushless motor 2, the second guide groove 12 of the stator core 10 is aligned with the positioning piece 52 on the inner wall of the housing assembly 50 and assembled into it. In this way, the accuracy of the lead-out position of the brushless motor 2 can be guaranteed, thereby improving the performance stability of the brushless motor 2. It also makes the connection between the stator core 10 and the housing assembly 50 more stable, preventing the stator core 10 from rotating in the housing assembly 50, thereby affecting the normal operation of the brushless motor 2.

[0071] The stator structure 1 of the present invention provides a protrusion 21 at the end surface of the insulating component 20 close to the stator core 10, so that the wire passing portion 31 is distributed on the protrusion 21 when it is wound along the outer peripheral wall of the insulating component 20. The protrusion 21 supports the wire passing portion 31 to prevent the wire passing portion 31 from loosening and falling off; and the spacing between the wire passing portion 31 and the stator core 10 is increased to prevent the wire passing portion 31 from contacting the outer peripheral wall of the stator core 10 when it is deformed and loose, thereby preventing leakage and poor voltage resistance.

[0072] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0073] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0074] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0075] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0076] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A stator structure (1), characterized in that: include: stator core (10); an insulating assembly (20) sleeved on the stator core (10) and fitted with an end face of the stator core (10); and The winding (30) comprises a wire-passing portion (31) and a coil portion (32) wound on the insulating assembly (20), wherein the wire-passing portion (31) is conductively connected to the coil portion (32); The insulating component (20) has a convex portion (21) extending from an end surface close to the stator core (10), and the wire-passing portion (31) is distributed along the convex portion (21) and connected to an external circuit board, so as to insulate the winding (30) from the stator core (10).

2. The stator structure (1) according to claim 1, characterized in that The convex portion (21) is arranged along the circumference of the insulating component (20); Alternatively, the protrusion (21) is arranged along the circumference of the end surface of the stator core (10).

3. The stator structure (1) according to claim 2, characterized in that The outer peripheral wall of the protrusion (21) is coaxial with the outer peripheral wall of the stator core (10).

4. The stator structure (1) according to claim 1, characterized in that The inner wall of the stator core (10) is provided with tooth slots (11), and the tooth slots (11) are connected to both end surfaces of the stator core (10); The insulating assembly (20) includes an annular insulating portion (22) and a slot-shaped insulating portion (23), wherein the slot-shaped insulating portion (23) is correspondingly inserted into the tooth slot (11) from one end face of the stator core (10), and the outer side wall of the slot-shaped insulating portion (23) is in contact with the inner side wall of the tooth slot (11); the annular insulating portion (22) is connected to the slot-shaped insulating portion (23) and is in contact with the end face of the stator core (10); and the coil portion (32) is wound on the slot-shaped insulating portion (23).

5. The stator structure (1) according to claim 4, characterized in that A limiting member (231) is provided at one end of the slot-shaped insulating portion (23) facing away from the annular insulating portion (22), and the limiting member (231) is staggered with the tooth groove (11).

6. The stator structure (1) according to claim 1, characterized in that A first guide groove (211) is provided at the connection between the protrusion (21) and the insulating assembly (20).

7. The stator structure (1) according to claim 6, characterized in that The depth of the first guide groove (211) is equal to the diameter of the wire-passing portion (31).

8. The stator structure (1) according to claim 1, characterized in that The insulating assembly (20) comprises a first insulating member (24) and a second insulating member (25), wherein the first insulating member (24) and the second insulating member (25) are respectively sleeved into the stator core (10) from both side end surfaces of the stator core (10).

9. The stator structure (1) according to claim 8, characterized in that A snap-fit ​​position (241) is provided at the connection between the first insulating member (24) and the second insulating member (25), and the second insulating member (25) is extended with a snap-fit ​​portion (251) for snapping into the snap-fit ​​position (241).

10. A brushless motor (2), characterized in that: The invention comprises a rotor assembly (40), a housing assembly (50) and a stator structure (1) according to any one of claims 1 to 9, wherein the stator core (10) is sleeved on the rotor assembly (40), and an accommodating space (51) for installing the stator core (10) is formed inside the housing assembly (50); a second guide groove (12) is provided on the outer peripheral wall of the stator core (10), and a positioning member (52) is provided at a position corresponding to the second guide groove (12) on the inner peripheral wall of the housing assembly (50).

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