A stator assembly

Abstract

The utility model discloses a stator assembly, which belongs to the technical field of motors, and solves the problem that the stator core needs to be installed with a retainer before winding. The technical solution to this problem mainly includes a stator core, a coil winding, an insulating frame and a wire hook frame, wherein the coil winding is wound on the stator core, the stator core is assembled in the insulating frame, the stator core is provided with a core through hole, the wire hook frame is arranged on the axial end side of the stator core through the insulating frame and is used to hook the coil winding, the stator assembly also includes a retainer that can be arranged in the core through hole and used to support the stator core, and the wire hook frame is arranged at intervals from the retainer. The utility model is mainly used to enable the stator core to be wound without installing a retainer.

Description

Technical Field

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

[0002] In the prior art, in mini saws, palm shears and other models that require a relatively compact structure of the whole machine and the motor, the motor usually adopts an outer rotor stator assembly. For example, utility model patent CN219779884U discloses an outer rotor motor assembly, including: a support base; a stator assembly, fixedly mounted on the support base, the stator assembly includes a winding frame and a stator wire wound on the winding frame; a rotor assembly, rotatably mounted on the support base, the rotor assembly can rotate relative to the stator assembly and the support base; a wire hook frame assembly, fixedly mounted on the support base, for hooking the stator wire. However, the stator assembly needs to be installed on the support base before winding, which is inconvenient. Utility Model Content

[0003] The utility model aims to provide a stator assembly, which solves the problem that the stator core needs to be installed with a retainer before winding, so that the stator core can be wound without installing a retainer.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a stator assembly, including a stator core, a coil winding, an insulating frame and a wire hook frame, the coil winding is wound on the stator core, the stator core is assembled in the insulating frame, the stator core is provided with a core through hole, the wire hook frame is arranged on the axial end side of the stator core through the insulating frame and is used to hook the coil winding, the stator assembly also includes a retaining frame that can be arranged in the core through hole and is used to support the stator core, and the wire hook frame is arranged at a distance from the retaining frame.

[0005] After adopting the above technical scheme, the utility model has the following advantages: first, the stator core is assembled in the insulating frame, so that the stator core can be formed, and the wire hook frame is arranged on the axial end side of the stator core through the insulating frame, and winding can be carried out without pressing the retaining frame, and the spacing between the wire hook frame and the retaining frame can also reduce the vibration effect on the stator core caused by the mechanical impact of the retaining frame on the wire hook frame, and is also conducive to the flow of air or coolant inside the stator assembly, thereby enhancing the heat exchange efficiency and effectively controlling the temperature rise of the stator assembly.

[0006] Furthermore, the wire hook frame includes an avoidance through hole, and the retaining frame passes through the avoidance through hole to extend into the iron core through hole, and there is a gap between the inner wall of the avoidance through hole and the retaining frame.

[0007] By adopting the above-mentioned technical solution, the gap design between the avoidance through hole and the retaining frame ensures that there is no direct contact between the two components, so that the retaining frame and the wire hook frame become relatively independent parts. Secondly, through the avoidance through hole design on the wire hook frame, the retaining frame can directly pass through the avoidance through hole and extend into the iron core through hole. This design simplifies the assembly steps.

[0008] Furthermore, the wire hooking frame and the insulating frame are integrally injection molded; or, the wire hooking frame and the insulating frame are fixedly connected.

[0009] By adopting the aforementioned technical solution, integrated molding allows the wire hook frame and the insulating frame to form a seamless overall structure with no joint gaps, which significantly enhances the connection strength between components, reduces the risk of vibration and displacement during long-term use, improves the overall stability and durability of the stator assembly, and simplifies the production process; alternatively, the fixed connection between the wire hook frame and the insulating frame allows the two to be designed and produced separately, providing designers with greater freedom to choose the most suitable materials and structures according to different motor specifications and performance requirements. If a part is damaged or needs to be replaced, the component can be directly replaced without replacing the entire assembly, reducing maintenance costs and complexity.

[0010] Furthermore, the wire hook frame includes an insulating body and a wiring terminal, and the wiring terminal and the insulating body are integrally injection molded.

[0011] By adopting the above-mentioned technical solution, through the one-piece molding technology, there is no gap or joint between the terminal and the insulating body, which greatly reduces the electrical leakage path, improves the insulation performance and electrical safety of the stator assembly, and can also improve the structural strength of the wire hook frame, effectively avoid loosening of the terminal, and effectively reduce the loosening of the coil winding, which is beneficial to ensure the safety of the stator assembly.

[0012] Furthermore, the insulating body is provided with a first positioning portion for positioning the wiring terminal and a second positioning portion for positioning the insulating frame, and the insulating frame is provided with a positioning fitting adapted to the second positioning portion.

[0013] By adopting the above-mentioned technical solution, the wiring terminal can be quickly and intuitively placed on the insulating body through a preset positioning structure, so that the position of the wiring terminal and the insulating body after integral injection molding is more accurate, and the position of the insulating body and the insulating frame after integral injection molding is also more accurate.

[0014] Furthermore, the insulating frame is integrally injection-molded with the stator core; or, the insulating frame includes a first insulating portion and a second insulating portion, a through slot is provided on the stator core, and the first insulating portion and the second insulating portion are respectively inserted at two ends of the slot.

[0015] By adopting the above technical solution, the insulating skeleton and the stator core are formed into a whole through one-piece molding without any joints, which greatly enhances the structural strength and vibration resistance, so that winding can be completed without pressing the retaining frame; alternatively, the first insulating part and the second insulating part can be replaced independently. If one part is damaged, there is no need to replace the entire assembly. The split structure allows the heat dissipation channel to be considered during the design. Through the gap or special design of the first and second insulating parts, the air circulation inside the stator assembly can be improved, thereby improving the heat dissipation efficiency.

[0016] Furthermore, the wire hook frame includes an insulating body and N connecting terminals wound around the insulating body, the stator core is provided with 4N winding teeth for winding the coil winding, the N connecting terminals are arranged between the 4N winding teeth at equal intervals, and the coil winding includes N turns of clockwise coils hung on the connecting terminals and wound around the insulating body in a clockwise direction and then wound around two adjacent connecting terminals, N turns of counterclockwise coils hung on the connecting terminals and wound around the insulating body in a counterclockwise direction and then wound around two adjacent connecting terminals, and 1 turn of fixed rings wound counterclockwise on the insulating body and hung on the connecting terminals.

[0017] By adopting the above technical solution, N terminals are arranged at equal intervals between 4N winding teeth, making full use of the space of the stator core. The regular arrangement and fixed terminals simplify the winding process. The coil windings wound clockwise and counterclockwise are distributed alternately, and the design of the fixed ring allows the coil windings to be arranged tightly and orderly, facilitating automated production and reducing the error rate of manual operation.

[0018] Furthermore, the two adjacent connecting terminals in the clockwise winding coil and the two adjacent connecting terminals in the counterclockwise winding coil are symmetrical along the axis of the stator core.

[0019] By adopting the above technical solution, the axially symmetrical coil winding layout can ensure the symmetry of the magnetic field distribution inside the stator assembly to the greatest extent, thereby improving the stability of the stator assembly.

[0020] Furthermore, the inlet end of the coil winding is located at the clockwise winding coil, and the outlet end of the coil winding is located at the fixed circle.

[0021] By adopting the above technical solution, the outlet end of the coil winding is located in the fixed ring, which can better fix and support the coil winding, reduce the wear or breakage of the wire caused by vibration, and thus increase the stability and service life of the stator assembly.

[0022] Furthermore, the incoming wire end and the outgoing wire end of the coil winding are both hung on the same wiring terminal.

[0023] By adopting the above technical solution, the shared wiring terminals reduce the number of wiring terminals, making the overall design of the stator assembly more compact. The unified wiring terminals can also reduce line confusion and facilitate installation and subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of a stator assembly of the utility model;

[0026] Figure 2 A cross-sectional view of a stator assembly mounting retainer of the utility model;

[0027] Figure 3 It is an exploded view of the stator assembly of the utility model;

[0028] Figure 4 It is an exploded view of the wire hook rack of the utility model;

[0029] Figure 5 A bottom view of the stator assembly of the utility model;

[0030] Figure 6 It is a side view of the stator assembly of the utility model;

[0031] Figure 7 A top view of the stator assembly of the utility model;

[0032] Figure 8 It is a circuit diagram of the stator assembly of the utility model;

[0033] Fig. 9 It is a winding schematic diagram of the stator assembly of the utility model;

[0034] In the figure, 10, stator core; 11, core through hole; 101, first winding tooth; 102, second winding tooth; 103, third winding tooth; 104, fourth winding tooth; 105, fifth winding tooth; 106, sixth winding tooth; 107, seventh winding tooth; 108, eighth winding tooth; 109, ninth winding tooth; 110, tenth winding tooth; 111, eleventh winding tooth; 112, twelfth winding tooth; 113, middle slot; 20, coil winding; 30, insulating skeleton; 31, positioning fitting; 40, wire hook frame; 41, avoidance through hole; 42, gap; 43, insulating body; 44, first terminal; 45, second terminal; 46, third terminal; 47, second positioning part; 48, first positioning part; 50, retaining frame. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0036] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0037] It should be understood that in various embodiments of the present invention, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0038] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0039] It should be understood that in the present utility model, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0040] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0041] like Figures 1 to 9As shown, the utility model provides a stator assembly, which is suitable for a brushless motor, especially the brushless motor is mainly used for garden tools such as electric drills, mini saws, and palm shears. The stator assembly includes a stator core 10, a coil winding 20, an insulating frame 30 and a wire hook frame 40. The coil winding 20 is wound on the stator core 10, and the stator core 10 is assembled in the insulating frame 30. The stator core 10 is provided with a core through hole 11. The wire hook frame 40 is arranged on the axial end side of the stator core 10 through the insulating frame 30 and is used to hook the coil winding 20. The stator assembly also includes a retaining frame 50 that can be arranged in the core through hole 11 and is used to support the stator core 10, and the wire hook frame 40 is arranged at a distance from the retaining frame 50.

[0042] First, the stator core 10 is assembled in the insulating frame 30, so that the stator core 10 can be formed. The wire hook frame 40 is arranged on the axial end side of the stator core 10 through the insulating frame 30, and winding can be carried out without pressing the retaining frame 50. That is, the insulating frame 30, the stator core 10 and the wire hook frame 40 can be wound after being assembled. In addition, the spacing between the wire hook frame 40 and the retaining frame 50 can also reduce the vibration effect on the stator core 10 caused by the mechanical impact of the retaining frame 50 on the wire hook frame 40, and is also beneficial to the flow of air or coolant inside the stator assembly, thereby enhancing the heat exchange efficiency and effectively controlling the temperature rise of the stator assembly.

[0043] Specifically, the wire hook frame 40 includes an avoidance through hole 41. When the wire hook frame 40 is installed on the insulating frame 30, the axis of the core through hole 11 coincides with the axis of the avoidance through hole 41. The retaining frame 50 passes through the avoidance through hole 41 to extend into the core through hole 11. There is a gap 42 between the inner wall of the avoidance through hole 41 and the retaining frame 50, ensuring that there is no direct contact between the two components, so that the retaining frame 50 and the wire hook frame 40 become relatively independent parts, so that the retaining frame 50 can directly pass through the avoidance through hole 41 and extend into the core through hole 11. Such a design simplifies the assembly steps.

[0044] In order to improve the structural strength of the wire hook frame 40, the wire hook frame 40 includes an insulating body 43 and a terminal block. The terminal block and the insulating body 43 are integrally injection molded. Through the integral molding technology, there is no gap or joint between the terminal block and the insulating body 43, which greatly reduces the electrical leakage path, improves the insulation performance and electrical safety of the stator assembly, and can also improve the structural strength of the wire hook frame 40, effectively prevent the terminal block from loosening, and effectively reduce the loosening of the coil winding 20, which is beneficial to ensure the safety of the stator assembly.

[0045] Furthermore, the insulating frame 30 and the stator core 10 are integrally injection molded, and the insulating frame 30 and the stator core 10 form a whole without joints, which greatly enhances the structural firmness and vibration resistance, so that the winding can be completed without the need to press the retaining frame 50. Finally, the wire hook frame 40 and the insulating frame 30 are integrally injection molded, and the integrated molding allows the wire hook frame 40 and the insulating frame 30 to form a seamless integral structure without a joint gap, which significantly enhances the connection strength between the components, reduces vibration and the risk of displacement during long-term use, improves the overall stability and durability of the stator assembly, and simplifies the production process.

[0046] To facilitate production, the insulating body 43 is provided with a first positioning portion 48 for positioning the wiring terminal and a second positioning portion 47 for positioning the insulating frame 30. The insulating frame 30 is provided with a positioning fitting 31 adapted to the second positioning portion 47. Through the preset positioning structure, the wiring terminal can be quickly and intuitively placed on the insulating body 43, so that the position of the wiring terminal and the insulating body 43 after integral injection molding is more accurate, and the position of the insulating body 43 and the insulating frame 30 after integral injection molding is also more accurate.

[0047] The first positioning member 48 is a first positioning groove, and the second positioning member 47 is a second positioning groove. The first positioning groove is a shape that matches the wiring terminal, so that the wiring terminal can be directly assembled on the insulating body 43. The positioning fitting 31 is a positioning rib that extends downward and matches the second positioning groove. Three positioning ribs can be provided along the circumferential direction of the insulating frame 30. Accordingly, the insulating body 43 can be provided with three positioning ribs, so that the wire hooking frame 40 can be more reliably assembled on the insulating frame 30.

[0048] The manufacturing principle of the stator assembly is that, first, the connection terminal is placed in the insulating body 43 by injection molding to form a wire hook frame 40, and the insulating body 43 can be phenolic resin. Then, the wire hook frame 40, the insulating frame 30 and the stator core 10 are integrally injection molded.

[0049] In order to improve the rationality of the routing of the coil winding 20, in this embodiment, the wire hook frame 40 includes N terminals wound around the circumference of the insulating body 43, and the stator core 10 is provided with 4N winding teeth for winding the coil winding 20. The N terminals are arranged at equal intervals between the 4N winding teeth. The coil winding 20 includes N turns of clockwise coils hung on the terminals and wound around the insulating body 43 clockwise and then wound around two adjacent terminals, N turns of counterclockwise coils hung on the terminals and wound around the insulating body 43 counterclockwise and then wound around two adjacent terminals, and 1 turn of fixed coils wound counterclockwise on the insulating body 43 and hung on the terminals. The clockwise coils, counterclockwise coils and fixed coils are wound in sequence.

[0050] By arranging N terminals at equal intervals between 4N winding teeth, the space of the stator core 10 is fully utilized. The regular arrangement and fixed terminals simplify the winding process. The coil windings 20 wound clockwise and counterclockwise are alternately distributed, and the design of the fixed ring allows the coil windings 20 to be arranged tightly and orderly, which facilitates automated production and reduces the error rate of manual operation.

[0051] In order to improve the stability of the stator assembly, two adjacent terminals in the clockwise winding coil and two adjacent terminals in the counterclockwise winding coil are symmetrical along the axis of the stator core 10. The axially symmetrical layout of the coil winding 20 can ensure the symmetry of the magnetic field distribution inside the stator assembly to the greatest extent. In addition, the inlet end of the coil winding is located at the clockwise winding coil, and the outlet end of the coil winding is located at the fixed ring, which can better fix and support the coil winding, reduce the wear or breakage of the wire caused by vibration, and thus increase the stability and service life of the stator assembly.

[0052] Furthermore, in order to further meet the requirements of compactness of garden tools such as electric drills, mini saws, and palm shears, the incoming and outgoing wires of the coil winding 20 are hung on the same terminal. The shared terminal reduces the number of terminals, making the overall design of the stator assembly more compact. The unified terminal can also reduce line confusion and facilitate installation and later maintenance.

[0053] Specifically, the terminal is located below the winding teeth in the axial direction of the stator core 10. The stator core 10 is provided with 12 winding teeth, 3 terminal blocks and 1 insulating body 43. The 12 winding teeth and the 3 terminal blocks are respectively arranged along the circumferential direction of the stator core 10. The 12 winding teeth include a first winding tooth 101, a second winding tooth 102, a third winding tooth 103, a fourth winding tooth 104, a fifth winding tooth 105, a sixth winding tooth 106, a seventh winding tooth 107, an eighth winding tooth 108, a ninth winding tooth 109, a tenth winding tooth 110, an eleventh winding tooth 111 and a twelfth winding tooth 112 arranged in the clockwise direction of the stator core 10. The 3 terminal blocks include a first terminal block 44, a second terminal block 45 and a third terminal block 46. An intermediate slot 113 is provided between two winding teeth. The first connecting terminal 44 is located below the tenth winding tooth 110 , the second connecting terminal 45 is located below the second winding tooth 102 , and the third connecting terminal 46 is located below the sixth winding tooth 106 .

[0054] Winding sequence, S1: the coil winding 20 is hung on the first terminal 44, and is wound around the insulating body 43 clockwise, and the wire is fed along the middle slot 113 between the first winding tooth 101 and the twelfth winding tooth 112, and is wound around the first winding tooth 101 and the second winding tooth 102;

[0055] S2: The coil winding 20 is wound around the insulating body 43 clockwise, hung with the third terminal 46, and wound around the insulating body 43 clockwise, fed along the middle slot 113 between the eighth winding tooth 108 and the ninth winding tooth 109, and wound around the ninth winding tooth 109 and the tenth winding tooth 110;

[0056] S3: The coil winding 20 is wound around the insulating body 43 clockwise, hung with the second terminal 45, wound around the insulating body 43 clockwise, fed along the middle slot 113 between the fourth winding tooth 104 and the fifth winding tooth 105, and wound around the fifth winding tooth 105 and the sixth winding tooth 106;

[0057] S4: The coil winding 20 is counterclockwise wound around the insulating body 43, hung with the second terminal 45, and then counterclockwise wound around the insulating body 43, and the wire is fed along the middle slot 113 between the eleventh winding tooth 111 and the twelfth winding tooth 112, and then wound around the eleventh winding tooth 111 and the twelfth winding tooth 112;

[0058] S5: The coil winding 20 is counterclockwise wound around the insulating body 43, hung with the first terminal 44, and then counterclockwise wound around the insulating body 43, fed along the middle slot 113 between the seventh winding tooth 107 and the eighth winding tooth 108, and wound around the seventh winding tooth 107 and the eighth winding tooth 108;

[0059] S6: The coil winding 20 is counterclockwise wound around the insulating body 43, hung with the third terminal 46, and then counterclockwise wound around the insulating body 43, fed along the middle slot 113 between the third winding tooth 103 and the fourth winding tooth 104, and wound around the third winding tooth 103 and the fourth winding tooth 104;

[0060] S7: The coil winding 20 is wound counterclockwise around the insulating body 43, and the first terminal 44 is hung, and the wire cutting is completed. This makes it possible to eliminate the risk of burning the coil winding 20 due to high temperature when the first terminal 44, the second terminal 45, and the third terminal 46 are pinched and welded.

[0061] It should be noted that the coil winding 20 may be an enameled wire.

[0062] It can be understood that in other embodiments, the insulating skeleton includes a first insulating part and a second insulating part, and a through slot is provided on the stator core. The first insulating part and the second insulating part are respectively inserted at both ends of the slot. The first insulating part and the second insulating part can be replaced independently. If one part of them is damaged, there is no need to replace the entire assembly. The split structure allows the heat dissipation channel to be considered during the design. Through the gap or special design of the first insulating part and the second insulating part, the air circulation inside the stator assembly can be improved, thereby improving the heat dissipation efficiency.

[0063] It is understandable that in other embodiments, the hooking frame is fixedly connected to the insulating frame. The hooking frame and the insulating frame are fixedly connected in a manner that allows the two to be designed and produced separately, providing designers with greater freedom to select the most suitable material and structure according to different motor specifications and performance requirements. If a part is damaged or needs to be replaced, the part can be directly replaced without replacing the entire assembly, reducing maintenance costs and complexity. Among them, the hooking frame can be fixedly connected to the insulating frame by a buckle.

[0064] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A stator assembly, comprising a stator core (10), a coil winding (20), an insulating frame (30) and a wire hook frame (40), wherein the coil winding (20) is wound on the stator core (10), the stator core (10) is assembled in the insulating frame (30), and the stator core (10) is provided with a core through hole (11), characterized in that: The wire hook frame (40) is arranged on the axial end side of the stator core (10) through an insulating frame (30) and is used to hook the coil winding (20). The stator assembly also includes a retaining frame (50) that can be arranged in the core through hole (11) and is used to support the stator core (10). The wire hook frame (40) and the retaining frame (50) are arranged at a distance.

2. The stator assembly according to claim 1, characterized in that: The wire hook frame (40) comprises an avoidance through hole (41), the retaining frame (50) passes through the avoidance through hole (41) to extend into the iron core through hole (11), and a gap (42) is provided between the inner wall of the avoidance through hole (41) and the retaining frame (50).

3. The stator assembly according to claim 1, characterized in that: The wire hooking frame (40) and the insulating frame (30) are integrally injection molded; or, the wire hooking frame (40) and the insulating frame (30) are fixedly connected.

4. The stator assembly according to claim 1, characterized in that: The wire hook frame (40) comprises an insulating body (43) and a connecting terminal, and the connecting terminal and the insulating body (43) are integrally injection-molded.

5. The stator assembly according to claim 4, characterized in that: The insulating body (43) is provided with a first positioning portion (48) for positioning the connection terminal and a second positioning portion (47) for positioning the insulating frame (30), and the insulating frame (30) is provided with a positioning fitting (31) adapted to the second positioning portion (47).

6. The stator assembly according to claim 1, characterized in that: The insulating frame (30) and the stator core (10) are integrally injection molded; or, the insulating frame (30) comprises a first insulating portion and a second insulating portion, the stator core (10) is provided with a through slot, and the first insulating portion and the second insulating portion are respectively inserted at two ends of the slot.

7. The stator assembly according to claim 1, characterized in that: The wire hook frame (40) comprises an insulating body (43) and N connecting terminals wound around the insulating body (43); the stator core (10) is provided with 4N winding teeth for winding the coil winding (20); the N connecting terminals are arranged between the 4N winding teeth at equal intervals; the coil winding (20) comprises N turns of a clockwise coil hung on the connecting terminal and wound around the insulating body (43) in a clockwise direction and then wound around two adjacent connecting terminals; N turns of a counterclockwise coil hung on the connecting terminal and wound around the insulating body (43) in a counterclockwise direction and then wound around two adjacent connecting terminals; and one turn of a fixing coil wound around the insulating body (43) in a counterclockwise direction and hung on the connecting terminal.

8. The stator assembly according to claim 7, characterized in that: The two adjacent connection terminals in the clockwise winding coil and the two adjacent connection terminals in the counterclockwise winding coil are symmetrical along the axis of the stator core (10).

9. The stator assembly according to claim 7, characterized in that: The inlet end of the coil winding (20) is located in the clockwise winding coil, and the outlet end of the coil winding (20) is located in the fixed circle.

10. The stator assembly according to claim 9, characterized in that: The inlet and outlet ends of the coil winding (20) are both hung on the same wiring terminal.

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