A novel flat wire and stator assembly, and manufacturing method

Abstract

This invention relates to the field of stator technology and discloses a novel flat wire, stator assembly, and manufacturing method, including a stator core and a stator winding. The stator core comprises multiple iron chips, with multiple mounting holes on the inner wall of each chip and multiple arc-shaped dovetail grooves on the outer wall. Insulating sleeves are inserted into the mounting holes, and the stator winding is inserted into the multiple insulating sleeves. Limiting units are installed between the multiple arc-shaped dovetail grooves. Each limiting unit includes multiple first limiting structures, each including a threaded sleeve rod. Limiting sleeves are slidably connected to the outer walls of both ends of the threaded sleeve rod. The stator core of this invention is composed of multiple iron chips, and the multiple iron chips are locked together by the first limiting structures, thereby allowing the thickness of the stator core to be adjusted according to requirements. The stator core is divided into multiple iron chips, and if one of the iron chips is damaged during production and use, it can be replaced, reducing the manufacturing cost of damage and improving practicality.

Description

Technical Field

[0001] This invention relates to the field of stator technology, specifically to a novel flat wire and stator assembly, and a manufacturing method thereof. Background Technology

[0002] With the rapid development of new energy vehicle technology, the performance requirements for automotive motors are becoming increasingly stringent. While continuously pursuing high slot fill factor, high power density, and high torque density, round wire motors have struggled to overcome the bottlenecks imposed by current performance demands on drive motors. The emergence of flat wire motors has achieved performance requirements that round wire motors cannot meet. They offer high slot fill factor, high power density, and excellent heat dissipation and NVH performance. Furthermore, they can significantly reduce the height of the motor winding ends, decrease copper usage, and reduce winding copper losses, thereby improving the efficiency of automotive drive motors.

[0003] The stator assembly of current flat wire motors mainly consists of a stator core and stator windings, with the stator windings inserted into the stator core. Compared to the windings in round wire motors, which are mounted on the core by winding, the stator assembly in flat wire motors has a simpler structure, higher efficiency, and better precision. Existing flat wire motor stator cores are generally made from a single metal part through cutting, resulting in a fixed structure. However, if this integrated stator core is damaged during production or operation, the entire core needs to be scrapped and remanufactured after modifying the mold, resulting in significant material and labor losses. Furthermore, it cannot adapt to the needs of different thicknesses, lacking versatility. Therefore, a new type of flat wire and stator assembly, as well as a manufacturing method, are proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a novel flat wire and stator assembly, as well as a manufacturing method, which adapts to the application requirements of different thicknesses and reduces manufacturing costs due to damage.

[0005] First aspect: To achieve the above objectives, the present invention provides the following technical solution: A novel stator assembly, comprising a stator core and a stator winding, wherein the stator core comprises multiple iron chips, the inner wall of which is provided with multiple mounting holes, and the outer wall of which is provided with multiple arc-shaped dovetail grooves, wherein an insulating sleeve is inserted into the mounting holes, and the stator winding is inserted into the multiple insulating sleeves, wherein a limiting unit is installed between the multiple arc-shaped dovetail grooves, the limiting unit comprising multiple first limiting structures, the first limiting structure comprising a threaded sleeve rod, wherein both ends of the threaded sleeve rod are slidably connected to limiting sleeves, wherein the end of the limiting sleeve rod away from the threaded sleeve rod is rotatably connected to a first bolt, one end of the first bolt being threadedly connected to the threaded sleeve rod, wherein both ends of the limiting sleeve rod away from the threaded sleeve rod are fixedly connected to a first limiting baffle, wherein the shape and outer wall dimensions of the limiting sleeve are the same as the shape and inner wall dimensions of the arc-shaped dovetail groove, and the outer wall dimension of the threaded sleeve rod is smaller than the inner wall dimension of the arc-shaped dovetail groove, wherein the limiting sleeve and the threaded sleeve rod are movably inserted into the arc-shaped dovetail groove;

[0006] The limiting unit also includes multiple second limiting structures. The second limiting structure includes a limiting threaded sleeve. Both ends of the limiting threaded sleeve are provided with sliding grooves. Locking rods are slidably connected in the sliding grooves. The ends of the two locking rods away from the limiting threaded sleeves are rotatably connected with second bolts. One end of the second bolt passes through the sliding groove and is threadedly connected to the limiting threaded sleeve. The locking rods and the limiting threaded sleeve are movably inserted into the arc-shaped dovetail groove.

[0007] There are four arc-shaped dovetail grooves, and two first limiting structures and two second limiting structures. The two first limiting structures and the two second limiting structures are respectively movably connected to the four arc-shaped dovetail grooves.

[0008] Preferably, a second limiting baffle is fixedly connected to the end of each of the two locking rods away from the limiting threaded sleeve. The outer wall dimension of the second limiting baffle is larger than the inner wall dimension of the arc-shaped dovetail groove. The outer shape and outer wall dimension of the limiting threaded sleeve are the same as the outer shape and inner wall dimension of the arc-shaped dovetail groove. The outer wall dimension of the locking rod is smaller than the inner wall dimension of the arc-shaped dovetail groove.

[0009] Preferably, the outer wall dimension of the first limiting baffle is larger than the inner wall dimension of the arc-shaped dovetail groove.

[0010] Preferably, there are four arc-shaped dovetail grooves, and two first limiting structures and two second limiting structures. The two first limiting structures and the two second limiting structures are respectively movably connected to the four arc-shaped dovetail grooves.

[0011] Preferably, multiple arc-shaped dovetail grooves are evenly formed on the outer wall of the iron chip, and two first limiting structures and two second limiting structures are staggered and inserted into the four arc-shaped dovetail grooves.

[0012] Preferably, the end faces of the limiting sleeve and the locking rod are both provided with countersunk holes, and the screw heads of the first bolt and the second bolt are respectively located in the countersunk holes on the end faces of the limiting sleeve and the locking rod.

[0013] Preferably, the inner wall of the arc-shaped dovetail groove is provided with a clearance groove, and the first limiting baffle and the second limiting baffle are respectively located in a plurality of clearance grooves. The depth and size of the clearance groove are equal to the thickness and size of the first limiting baffle and the second limiting baffle.

[0014] Preferably, the outer wall of the insulating sleeve is provided with multiple separation grooves, and the thickness of the separation grooves is less than the thickness of the insulating sleeve.

[0015] Preferably, the distance between the midpoints of two adjacent separation grooves is equal to the thickness of the iron chip.

[0016] Second aspect: A flat wire, comprising the flat wire and the novel stator assembly described in any one of the first aspects, wherein the stator winding is composed of the flat wire arranged in a certain pattern.

[0017] Third aspect: A method for manufacturing a stator assembly, using the novel stator assembly described in any one of the first aspects, specifically including the following steps:

[0018] S1: According to the required thickness of the stator core, stack and align a sufficient number of iron chips, use the first and second limiting structures in conjunction with the arc-shaped dovetail grooves on the iron chips to lock and fix the stacked iron chips, and insert the insulating sleeve into the mounting holes on the iron chips.

[0019] As a further improvement to the above technical solution:

[0020] S2: The stator winding is installed inside the insulating sleeve using automated equipment and then twisted and welded.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The stator core in this invention is composed of multiple iron chips, and the multiple iron chips are locked together by a first limiting structure, so that the thickness of the stator core can be adjusted according to the requirements. The stator core is divided into multiple iron chips. If one of the iron chips is damaged during production and use, it can be replaced, reducing the manufacturing cost of damage and improving practicality.

[0023] 2. The present invention locks multiple iron chips by means of a first limiting structure and a second limiting structure. The first limiting structure can restrict the multiple iron chips at both ends of the stator core, and the second limiting structure can restrict the multiple iron chips in the middle of the stator core, thereby improving the strength and stability of the combined multiple iron chips and improving practicality.

[0024] 3. The present invention provides a separation groove on the outer wall of the insulating sleeve, which allows the length of the insulating sleeve to be cut according to the thickness of the multiple stacked iron cores, thereby adapting it to the thickness of the stator core.

[0025] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the mounting structure of the flat wire and the iron chip of the present invention;

[0028] Figure 3 This is a schematic diagram of the stacked structure of multiple iron chips of the present invention;

[0029] Figure 4 This is a schematic diagram of the iron chip structure of the present invention;

[0030] Figure 5 This is a detailed structural diagram of the first limiting structure of the present invention;

[0031] Figure 6 This is a cross-sectional view of the first limiting structure of the present invention;

[0032] Figure 7 This is a detailed structural diagram of the second limiting structure of the present invention;

[0033] Figure 8 This is a cross-sectional schematic diagram of the second limiting structure of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the outer wall of the insulating sleeve of the present invention.

[0035] In the diagram: 1. Stator core; 11. Iron core; 12. Mounting hole; 13. Arc-shaped dovetail groove; 2. Stator winding; 21. Flat wire; 3. Limiting unit; 31. First limiting structure; 311. Threaded sleeve; 312. Limiting sleeve; 313. First bolt; 314. First limiting baffle; 32. Second limiting structure; 321. Limiting threaded sleeve; 322. Slide groove; 323. Locking rod; 324. Second bolt; 325. Second limiting baffle; 4. Relief groove; 5. Separation groove; 6. Countersunk hole; 7. Insulating sleeve. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1:

[0038] Please see Figure 1-9This embodiment of a novel stator assembly includes a stator core 1 and a stator winding 2. The stator core 1 includes multiple iron chips 11. Multiple mounting holes 12 are formed on the inner wall of each iron chip 11, and multiple arc-shaped dovetail grooves 13 are formed on the outer wall of each iron chip 11. Insulating sleeves 7 pass through the mounting holes 12. The stator winding 2 passes through the multiple insulating sleeves 7. Limiting units 3 are installed between the multiple arc-shaped dovetail grooves 13. The limiting units 3 include multiple first limiting structures 31. Each first limiting structure 31 includes a threaded sleeve 311. Limiting sleeves 312 are slidably connected to the outer walls of both ends of the threaded sleeve 311. A first bolt 313 is rotatably connected to one end of the threaded sleeve 311. One end of the first bolt 313 is threadedly connected to the threaded sleeve 311. A first limiting baffle 314 is fixedly connected to the ends of the two limiting sleeves 312 away from the threaded sleeve 311. The shape and outer wall size of the limiting sleeve 312 are the same as the shape and inner wall size of the arc-shaped dovetail groove 13. The outer wall size of the threaded sleeve 311 is smaller than the inner wall size of the arc-shaped dovetail groove 13. The limiting sleeves 312 and the threaded sleeve 311 are movably inserted into the arc-shaped dovetail groove 13. The outer wall size of the first limiting baffle 314 is larger than the inner wall size of the arc-shaped dovetail groove 13.

[0039] Specifically, the flat wire stator assembly structure in this invention is similar to that of existing flat wire stator assemblies. The main improvement of this invention lies in adapting to the usage requirements of different thicknesses and reducing manufacturing costs. When assembling the stator core 1, this invention selects a sufficient number of iron chips 11 according to the required thickness of the stator core 1, stacks multiple iron chips 11, and aligns the arc-shaped dovetail grooves 13 on the multiple iron chips 11. At this time, the threaded sleeve 311 is inserted into the arc-shaped dovetail grooves 13 on the multiple iron chips 11, and then two limiting sleeves 312 are inserted from the arc-shaped dovetail grooves 13 on the iron chips 11 located at both ends, so that the limiting sleeves 312 are fitted onto the threaded sleeve. Outside the rod 311, rotate the first bolt 313 to make the first bolt 313 threadedly connected to the threaded sleeve rod 311 until the first limiting baffles 314 at the ends of the two limiting abutments 312 abut against the outer walls of the iron chips 11 at both ends, thus assembling the stator core 1. At this time, the insulating sleeve 7 can be inserted into the mounting holes 12 on the multiple iron chips 11, and then the stator winding 2 can be installed in the mounting holes 12. This allows the thickness of the stator core 1 to be adjusted according to requirements. The stator core 1 can be disassembled into multiple iron chips 11. If one of the iron chips 11 is damaged during production and use, it can be replaced, reducing the manufacturing cost of damage and improving practicality.

[0040] Specifically, the limiting unit 3 also includes multiple second limiting structures 32. Each second limiting structure 32 includes a limiting threaded sleeve 321. Both ends of the limiting threaded sleeve 321 have grooves 322. Locking rods 323 are slidably connected within the grooves 322. A second bolt 324 is rotatably connected to the end of each locking rod 323 away from the limiting threaded sleeve 321. One end of the second bolt 324 passes through the groove 322 and is threadedly connected to the limiting threaded sleeve 321. The two locking rods 323 are located away from the limiting threaded sleeve 321. Each end is fixedly connected to a second limiting baffle 325. The outer wall dimension of the second limiting baffle 325 is larger than the inner wall dimension of the arc-shaped dovetail groove 13. The outer shape and outer wall dimension of the limiting threaded sleeve 321 are the same as the outer shape and inner wall dimension of the arc-shaped dovetail groove 13. The outer wall dimension of the locking rod 323 is smaller than the inner wall dimension of the arc-shaped dovetail groove 13. The locking rod 323 and the limiting threaded sleeve 321 are movably inserted into the arc-shaped dovetail groove 13. When fixing multiple iron chip pieces 11, multiple first limiting structures 31 and multiple... A second limiting structure 32 fixes multiple iron chip pieces 11. During installation, the limiting threaded sleeve 321 is first inserted into the arc-shaped dovetail groove 13 on the multiple iron chip pieces 11. Then, two locking rods 323 are inserted into the arc-shaped dovetail grooves 13 on the iron chip pieces 11 at both ends, so that the locking rods 323 are inserted into the sliding grooves 322 on the limiting threaded sleeve 321. Finally, the second bolt 324 is rotated to thread the second bolt 324 onto the limiting threaded sleeve 321, thereby driving the locking rods 323. The rod slides within the groove 322 until the second limiting baffle 325 at the end of the locking rod 323 abuts against the outer wall of the iron chip 11 located at both ends. By using the limiting threaded sleeve 321 and the limiting abutment sleeve 312 to restrict the arc-shaped dovetail groove 13, the first limiting structure 31 can restrict the multiple iron chips 11 at both ends of the stator core 1, and the second limiting structure 32 can restrict the multiple iron chips 11 in the middle of the stator core 1, thereby improving the strength and stability of the combined multiple iron chips 11 and improving practicality.

[0041] Specifically, there are four arc-shaped dovetail grooves 13, and two first limiting structures 31 and two second limiting structures 32. The two first limiting structures 31 and the two second limiting structures 32 are respectively movably inserted into the four arc-shaped dovetail grooves 13. The multiple first limiting structures 31 and the multiple second limiting structures 32 respectively block and restrict multiple points of the multiple iron chip 11, improve stability, and ensure the strength of the stator core 1 assembly.

[0042] Specifically, multiple arc-shaped dovetail grooves 13 are evenly formed on the outer wall of the iron chip 11, and two first limiting structures 31 and two second limiting structures 32 are interleaved in the four arc-shaped dovetail grooves 13; the two first limiting structures 31 and the two second limiting structures 32, which are symmetrically distributed, mutually restrain each other, so that the symmetrical parts of the iron chip 11 are restricted, ensuring stability and strength.

[0043] Specifically, countersunk holes 6 are provided on the end faces of the limiting sleeve 312 and the locking rod 323, and the screw heads of the first bolt 313 and the second bolt 324 are located in the countersunk holes 6 on the end faces of the limiting sleeve 312 and the locking rod 323, respectively; the first bolt 313 and the second bolt 324 are distributed without protruding from the limiting sleeve 312 and the locking rod 323, reducing the space occupied during installation.

[0044] Specifically, the inner wall of the arc-shaped dovetail groove 13 is provided with a clearance groove 4. The first limiting baffle 314 and the second limiting baffle 325 are respectively located in multiple clearance grooves 4. The depth and size of the clearance groove 4 are equal to the thickness and size of the first limiting baffle 314 and the second limiting baffle 325. The first limiting baffle 314 and the second limiting baffle 325 are both installed in the first limiting baffle 314, without protruding the iron chip 11, so that the stator iron core 1 can be installed in a cylindrical shape, avoiding wear and damage, while reducing the space occupied during installation, and allowing the stator iron core 1 to be tightly fitted with the electronic housing, ensuring the stability of the installation.

[0045] Specifically, the outer wall of the insulating sleeve 7 is provided with multiple separation grooves 5, the thickness of the separation grooves 5 is less than the thickness of the insulating sleeve 7; according to the number of stator cores 1 formed by the combination of iron chips 11, the insulating sleeve 7 is cut into corresponding sizes through the separation grooves 5, so that the size of the insulating sleeve 7 can be adjusted to fit the size of the stator core 1.

[0046] Specifically, the midpoint distance between two adjacent separation grooves 5 is equal to the thickness of the iron chip 11; based on the number of separation grooves 5 and the number of iron chips 11, the cutting position of the insulating sleeve 7 can be determined, making it convenient to determine the size.

[0047] The implementation steps in this embodiment are as follows: When it is necessary to assemble the stator core 1, select a sufficient number of iron chips 11 according to the required thickness of the stator core 1, stack multiple iron chips 11, and align the arc-shaped dovetail grooves 13 on the multiple iron chips 11. At this time, insert the threaded sleeve 311 and the limiting threaded sleeve 321 alternately into the arc-shaped dovetail grooves 13 on the multiple iron chips 11. Then, insert multiple limiting sleeves 312 and multiple locking rods 323 from the arc-shaped dovetail grooves 13 on the iron chips 11 located at both ends, so that the limiting sleeves 312 are sleeved on the threaded sleeves 311, and the locking rods are engaged. Insert 323 into the groove 322 on the limiting threaded sleeve 321, then rotate the first bolt 313 and the second bolt 324 so that one end of the first bolt 313 is threadedly connected to the threaded sleeve rod 311, and the second bolt 324 is threadedly connected to the limiting threaded sleeve 321, until the first limiting baffle 314 at the end of the limiting abutment 312 and the second limiting baffle 325 at the end of the locking rod 323 are inserted into the relief groove 4 and pressed together, thus realizing the assembly of the stator core 1. At this time, the insulating sleeve 7 can be inserted into the mounting hole 12 on the multiple iron chip 11, and then the stator winding 2 can be installed in the mounting hole 12.

[0048] Example 2:

[0049] As a further improvement to the above technical solution: a flat wire 21, including the flat wire 21 and the novel stator assembly described in any one of Embodiment 1, wherein the stator winding 2 is composed of the flat wire 21 arranged in a certain pattern.

[0050] Example 3:

[0051] As a further improvement to the above technical solution: a method for manufacturing a stator assembly, using the novel stator assembly described in any one of Embodiments 1, specifically includes the following steps:

[0052] S1: According to the required thickness of the stator core 1, stack and align a sufficient number of iron chips 11, use the first limiting structure 31 and the second limiting structure 32 in conjunction with the arc-shaped dovetail groove 13 on the iron chips 11 to lock and fix the stacked iron chips 11, and insert the insulating sleeve 7 into the mounting hole 12 on the iron chips 11.

[0053] S2: The stator winding 2 is installed in the insulating sleeve 7 by automated equipment and then twisted and welded.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A novel stator assembly, comprising a stator core (1) and a stator winding (2), characterized in that, The stator core (1) includes multiple iron chips (11). Multiple mounting holes (12) are provided on the inner wall of each iron chip (11), and multiple arc-shaped dovetail grooves (13) are provided on the outer wall of each iron chip (11). Insulating sleeves (7) are inserted into the mounting holes (12). The stator winding (2) is inserted into the multiple insulating sleeves (7). Limiting units (3) are installed between the multiple arc-shaped dovetail grooves (13). Each limiting unit (3) includes multiple first limiting structures (31). Each first limiting structure (31) includes a threaded sleeve (311). Limiting sleeves (312) are slidably connected to the outer walls of both ends of the threaded sleeve (311). 312) The end away from the threaded sleeve (311) is rotatably connected to the first bolt (313). One end of the first bolt (313) is threadedly connected to the threaded sleeve (311). The ends of the two limiting sleeves (312) away from the threaded sleeve (311) are fixedly connected to the first limiting baffle (314). The shape and outer wall size of the limiting sleeve (312) are the same as the shape and inner wall size of the arc-shaped dovetail groove (13). The outer wall size of the threaded sleeve (311) is smaller than the inner wall size of the arc-shaped dovetail groove (13). The limiting sleeve (312) and the threaded sleeve (311) are movably inserted into the arc-shaped dovetail groove (13). The limiting unit (3) also includes multiple second limiting structures (32). The second limiting structure (32) includes a limiting threaded sleeve (321). Both ends of the limiting threaded sleeve (321) are provided with a sliding groove (322). A locking rod (323) is slidably connected in the sliding groove (322). The ends of the two locking rods (323) away from the limiting threaded sleeve (321) are rotatably connected with a second bolt (324). One end of the second bolt (324) passes through the sliding groove (322) and is threadedly connected to the limiting threaded sleeve (321). The locking rod (323) and the limiting threaded sleeve (321) are movably inserted into the arc-shaped dovetail groove (13). There are four arc-shaped dovetail grooves (13), and two first limiting structures (31) and two second limiting structures (32). The two first limiting structures (31) and the two second limiting structures (32) are respectively connected to the four arc-shaped dovetail grooves (13).

2. The novel stator assembly according to claim 1, characterized in that, The ends of the two locking rods (323) away from the limiting threaded sleeve (321) are fixedly connected to the second limiting baffle (325). The outer wall dimension of the second limiting baffle (325) is larger than the inner wall dimension of the arc-shaped dovetail groove (13). The outer shape and outer wall dimension of the limiting threaded sleeve (321) are the same as the inner shape and inner wall dimension of the arc-shaped dovetail groove (13). The outer wall dimension of the locking rod (323) is smaller than the inner wall dimension of the arc-shaped dovetail groove (13).

3. A novel stator assembly according to claim 1, characterized in that, The outer wall dimension of the first limiting baffle (314) is larger than the inner wall dimension of the arc-shaped dovetail groove (13).

4. A novel stator assembly according to claim 1, characterized in that, Multiple arc-shaped dovetail grooves (13) are evenly opened on the outer wall of the iron chip (11), and two first limiting structures (31) and two second limiting structures (32) are interleaved in the four arc-shaped dovetail grooves (13).

5. A novel stator assembly according to claim 2, characterized in that, The end faces of the limiting sleeve (312) and the locking rod (323) are both provided with countersunk holes (6), and the screw heads of the first bolt (313) and the second bolt (324) are located in the countersunk holes (6) on the end faces of the limiting sleeve (312) and the locking rod (323), respectively.

6. A novel stator assembly according to claim 2, characterized in that, The inner wall of the arc-shaped dovetail groove (13) is provided with a clearance groove (4). The first limiting baffle (314) and the second limiting baffle (325) are respectively located in multiple clearance grooves (4). The depth and size of the clearance groove (4) are equal to the thickness and size of the first limiting baffle (314) and the second limiting baffle (325).

7. A novel stator assembly according to claim 1, characterized in that, The outer wall of the insulating sleeve (7) is provided with multiple separation grooves (5), and the thickness of the separation grooves (5) is less than the thickness of the insulating sleeve (7).

8. A novel stator assembly according to claim 7, characterized in that, The midpoint distance between two adjacent separation grooves (5) is equal to the thickness of the iron chip (11).

9. A flat wire, characterized in that, The stator assembly includes flat wires (21) and any one of claims 1-8, wherein the stator winding (2) is composed of flat wires (21) arranged in a certain pattern.

10. A method for manufacturing a stator assembly, characterized in that, The novel stator assembly according to any one of claims 1-8 specifically includes the following steps: S1: According to the required thickness of the stator core (1), stack and align a sufficient number of iron chips (11), use the first limiting structure (31) and the second limiting structure (32) in conjunction with the arc-shaped dovetail groove (13) on the iron chips (11) to lock and fix the stacked iron chips (11), and insert the insulating sleeve (7) into the mounting hole (12) on the iron chips (11); S2: The stator winding (2) is installed in the insulating sleeve (7) by automated equipment and twisted and welded.

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