Inverted hook texture structure and process of motor stator

Abstract

The invention relates to the technical field of motor stators, in particular to a motor stator barb texture structure and process, which comprises a stator core, a rubber coating support, a coil winding and wiring PINs, the stator core is annularly and uniformly provided with a plurality of coil winding arms, the rubber coating support is coated outside the stator core, and the wiring PINs are coated outside the coil winding arms. A coil winding arm is arranged on the inner diameter of the stator iron core, an insulation winding arm is wrapped on the corresponding coil winding arm, the coil winding is wound on the insulation winding arm, the rubber coating support is provided with a mounting table at the inner diameter of the stator iron core, the plurality of wiring PINs are annularly arranged on the mounting table, the wiring PINs are provided with wire hanging grooves, and the wiring PINs are arranged in the wire hanging grooves. The device is used for winding and fixing wire ends of coil windings. In the press-fitting process, even if the wire end is impacted by a certain external force, the groove can prevent the wire end from sliding at will, and firm connection between the wire end and the wiring PIN needle is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor stator, in particular to a motor stator inverted hook and bite structure and process. BACKGROUND

[0002] Motors have been widely used in many fields such as industrial production, transportation, smart home, etc. The motor stator, as an important part of the motor, its performance directly affects the overall operation effect of the motor. In the existing motor stator technology, the connection problem of the wire head of the winding and the PIN needle has always been a difficult problem plaguing the industry. The traditional connection method usually uses simple winding or welding method, but these methods have obvious shortcomings. During the operation of the motor, the motor itself will vibrate and be affected by the external environment, and the connection between the wire head of the winding and the PIN needle is prone to looseness.

[0003] In the production process of the motor stator, the pressing step is a key step. However, in the pressing process, the unstable connection problem of the wire head of the winding and the PIN needle is particularly prominent. The existing connection structure often cannot withstand the large pressure generated during pressing, resulting in the wire head falling off the PIN needle. Once the wire falls off, it needs to be connected again, which not only increases the time cost and labor cost of production, but also affects the production efficiency and quality stability of the product. Therefore, developing a motor stator structure and connection technology that can effectively solve the unstable connection of the winding wire head and the PIN needle and prevent the wire from falling off during the pressing process has become an important problem to be solved in the current motor industry. SUMMARY

[0004] To solve the above problems, the motor stator inverted hook and bite structure and process of the present application can prevent the wire head from sliding randomly and ensure the firm connection between the wire head and the wiring PIN needle during the pressing process, even if subjected to a certain external impact.

[0005] The technical solution adopted by the present application is: a motor stator inverted hook and bite structure, comprising a stator core, a rubber-coated support, a coil winding and a wiring PIN needle, the stator core is provided with a plurality of coil winding arms uniformly distributed in a ring shape, the rubber-coated support is wrapped outside the stator core and corresponds to the coil winding arm to wrap an insulating winding arm, the coil winding is wound on the insulating winding arm, the rubber-coated support is provided with a mounting table at the inner diameter of the stator core, a plurality of wiring PIN needles are provided, the plurality of wiring PIN needles are arranged in a ring shape on the mounting table, the wiring PIN needle is provided with a wire hanging groove for winding and fixing the wire head of the coil winding.

[0006] Further improvement of the above-mentioned scheme is that the end of the coil winding arm is provided with a magnetic yoke part, the insulating winding arm is provided with an expansion part, and the expansion part wraps the magnetic yoke part.

[0007] Further improvement of the above scheme is that the mounting table is filled with the inner diameter of the stator core, and the mounting table is provided with a connecting part connected with the insulation winding arm.

[0008] Further improvement of the above scheme is that the mounting table is filled with the inner diameter of the stator core, and the mounting table is provided with a connecting part connected with the insulation winding arm.

[0009] Further improvement of the above scheme is that the mounting table is filled with the inner diameter of the stator core, and the mounting table is provided with a connecting part connected with the insulation winding arm.

[0010] Further improvement of the above scheme is that the mounting table is filled with the inner diameter of the stator core, and the mounting table is provided with a connecting part connected with the insulation winding arm.

[0011] Further improvement of the above scheme is that the mounting table is filled with the inner diameter of the stator core, and the mounting table is provided with a connecting part connected with the insulation winding arm.

[0012] Further improvement of the above scheme is that the mounting table is filled with the inner diameter of the stator core, and the mounting table is provided with a connecting part connected with the insulation winding arm.

[0013] A hook bite process for preparing the hook bite structure of the motor stator, comprising the following steps: Step S1, preparing the stator core: a plurality of stator iron sheets are laminated to form a stator core; Step S2, stator encapsulation: the stator core is placed in an encapsulation mold for injection molding, and an encapsulation support is formed on the outside of the stator core; Step S3, assembling the wiring PIN needle: the mounting table is simultaneously formed during the injection molding process, and the wiring PIN needle is pre-inserted on the mounting table; Step S4, winding preparation: winding is performed on the insulation winding arm, and after the winding is completed, the wire head of the coil winding is arranged on the wire hanging groove of the wiring PIN needle; Step S5, wiring PIN needle press fitting: the wiring PIN needle is pressed into the mounting table, and the wire head of the coil winding is arranged towards the surface of the mounting table; Step S6, fixation welding: the wire head of the coil winding and the wiring PIN needle are welded to fixedly connect the wire head of the coil winding and the wiring PIN needle.

[0014] Further improvement of the above scheme is that in step S3, before the pins are pre-assembled to the rubber-coated core, the device is used to realize pin feeding, extrusion, insertion and cutting, wherein the extrusion is realized by a cylinder connected with a cam mechanism and a pressing groove die, the pressing groove depth can be controlled at 0.08-0.15mm, the groove width is increased from 0.8mm to 0.9mm, and the pressing groove die is provided with edges to realize clear groove marks The present application has the following advantages: Compared with the existing motor stator, the rubber-coated support of the present application is wrapped outside the stator core, and the corresponding coil winding arm is wrapped with an insulating winding arm, which provides a good insulating environment for the coil winding, avoids the short circuit problem between the winding and the core, and also enhances the stability of the entire structure. In the process of pressing the wiring PIN pin, the rubber-coated support can provide stable support for the stator core and the coil winding, reducing the structural deformation caused by external pressure, thereby reducing the risk of wire head falling out. The wire hanging groove provided on the wiring PIN pin is an important design to prevent the wire head from falling out. When the wire head of the coil winding is wound in the wire hanging groove, the groove can limit the wire head to a certain extent. During the pressing process, even if it is subjected to a certain external impact, the groove can prevent the wire head from sliding randomly, ensuring the firm connection between the wire head and the wiring PIN pin. A plurality of wiring PIN pins are arranged in a ring shape on the mounting table, and the ring-shaped distribution makes the entire wiring structure more reasonable. It can evenly distribute the tension of the coil winding, avoiding the wire head from falling out of the wiring PIN pin due to excessive local tension. At the same time, the ring-shaped arrangement also facilitates the connection and wiring of the coil winding, improving the production efficiency. The stator core is arranged in a ring shape with a plurality of coil winding arms, which cooperates with the insulating winding arm of the rubber-coated support and the ring-shaped wiring PIN pin to form a whole stable structure. During the pressing of the wiring PIN pin, the components cooperate with each other and work together, further enhancing the reliability of the entire structure, effectively preventing the wire head of the coil winding from falling out of the wiring PIN pin, and ensuring the normal operation and performance stability of the motor stator.

[0015] The present application discloses a process for manufacturing the motor stator undercut structure. In step S1, a plurality of stator iron sheets are stacked to form a stator core, ensuring the stability and integrity of the stator core structure. The stable stator core provides a solid foundation for subsequent processes such as encapsulation and winding, reducing the possibility of wire head disconnection due to core deformation and other issues. In step S2, the stator is encapsulated, and an encapsulation support is formed on the outside of the stator core, corresponding to the coil winding arm. The encapsulation support not only provides insulation protection but also enhances the strength and stability of the overall structure. During the PIN needle pressing process, it can buffer the influence of external force on the stator core and coil winding, reducing the risk of wire head disconnection due to external force. In step S3, the mounting table is formed and the PIN needle is pre-inserted during the injection molding process, ensuring the accuracy of the PIN needle position. This allows the subsequent winding and pressing processes to proceed smoothly, avoiding unstable wire winding and disconnection due to PIN needle position deviation. In step S4, the coil winding is wound on the insulation winding arm, and the wire head is wound on the wire hanging groove of the PIN needle. The wire hanging groove plays a role in preliminary fixing the wire head. The wire head is effectively constrained before pressing, preventing it from moving randomly. In step S5, the PIN needle is pressed into the mounting table, and the wire head is close to the surface of the mounting table, further stabilizing the connection between the wire head and the PIN needle. Through pressing, the friction and bonding force between the two are enhanced, reducing the probability of wire head disconnection. Finally, in step S6, the wire head of the coil winding and the PIN needle are firmly connected together through fixation and welding. The connection point formed by welding has high strength and stability, fundamentally eliminating the problem of wire head disconnection during PIN needle pressing, ensuring the reliability and stability of the motor stator undercut structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a perspective view of the motor stator undercut structure of the present application; Figure 2 FIG. 2 is another perspective view of the motor stator undercut structure of the present application; Figure 1 FIG. 3 is a front view of the motor stator undercut structure of the present application; Figure 3 Figure 1 FIG. 4 is a flowchart of the undercut process of the present application. Figure 4 FIG. 5 is a schematic diagram of the undercut process of the present application.

[0017] FIG. 6 is a schematic diagram of the undercut process of the present application. DETAILED DESCRIPTION ​

[0018] For the purposes of the present application, a more complete understanding can be obtained by reference to the following description taken in connection with the accompanying drawings. The drawings are intended to illustrate preferred embodiments of the present application and are not intended to limit the scope of the application. Rather, the drawings are intended to illustrate the disclosure of the present application.

[0019] It is noted that as used herein, the terms "over," "under," "between," and "on" are intended to encompass both the direct and indirect spatial relationships. For the purposes of the present application, the terms "connected" and "coupled" are used broadly and encompass both direct and indirect connections and couplings.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety. Figures 1-4As shown, in one embodiment of the present application, a motor stator hook bite structure is disclosed, comprising a stator core 1, a rubber-coated support 2, a coil winding 3 and a wiring PIN 4, the stator core 1 is provided with a plurality of coil winding arms 11 in a ring distribution, the rubber-coated support 2 is coated on the outside of the stator core 1, and the coil winding arm 11 is coated with an insulating winding arm 21, the coil winding 3 is wound on the insulating winding arm 21, the rubber-coated support 2 is provided with a mounting table 22 on the inner diameter of the stator core 1, the wiring PIN 4 is provided with a plurality of wiring PINs 4, the wiring PIN 4 is provided with a hanging groove 41 on the wiring PIN 4, and the wire head of the coil winding 3 is wound and fixed. The rubber-coated support 2 of the present embodiment is coated on the outside of the stator core 1, and the coil winding arm 11 is coated with an insulating winding arm 21, which provides a good insulating environment for the coil winding 3, avoids the short circuit problem between the winding and the core, and enhances the stability of the whole structure. In the process of pressing the wiring PIN 4, the rubber-coated support 2 can stably support the stator core 1 and the coil winding 3, reduce the structural deformation caused by external pressure, and reduce the risk of wire head falling out. The hanging groove 41 provided on the wiring PIN 4 is an important design to prevent the wire head from falling out. When the wire head of the coil winding 3 is wound in the hanging groove 41, the groove can limit the wire head to a certain extent. In the process of pressing, even if it is subjected to a certain external impact, the groove can prevent the wire head from sliding randomly, and ensure the firm connection between the wire head and the wiring PIN 4. A plurality of wiring PINs 4 are arranged in a ring on the mounting table 22, and the ring distribution makes the whole wiring structure more reasonable. It can evenly disperse the tension of the coil winding 3, avoid the wire head from falling out of the wiring PIN 4 due to excessive local tension. At the same time, the ring arrangement also facilitates the connection and wiring of the coil winding 3, and improves the production efficiency. The stator core 1 is provided with a plurality of coil winding arms 11 in a ring distribution, which cooperates with the insulating winding arm 21 of the rubber-coated support 2 and the ring arrangement of the wiring PIN 4 to form a whole stable structure. When the wiring PIN 4 is pressed, the components cooperate with each other and work together, further enhancing the reliability of the whole structure, effectively preventing the wire head of the coil winding 3 from falling out of the wiring PIN 4, and ensuring the normal operation and performance stability of the motor stator.

[0021] The end of the coil winding arm 11 is provided with a magnetic yoke part 12, and the insulating winding arm 21 is provided with an expansion part 211 that covers the magnetic yoke part 12. In this embodiment, from the perspective of the magnetic circuit, the presence of the magnetic yoke part 12 can optimize the magnetic circuit distribution of the motor. The magnetic yoke can guide and constrain the magnetic force lines, so that the magnetic force lines pass through the magnetic yoke part 12 more concentratedly, reducing the leakage magnetic phenomenon. It helps to improve the magnetic permeability and electromagnetic conversion efficiency of the motor, and thus improves the overall performance of the motor, so that it can more efficiently convert electrical energy into mechanical energy. In terms of insulation, the expansion part 211 of the insulating winding arm 21 covers the magnetic yoke part 12, providing reliable insulation protection for the magnetic yoke part 12. It can prevent electrical short circuit between the coil winding 3 and the magnetic yoke part 12, and avoid motor failure and safety hazards caused by short circuit. Moreover, the design of the expansion part 211 increases the insulation area, further enhances the insulation effect, and ensures the stable operation of the motor under different working conditions.

[0022] The mounting table 22 fills the inner diameter of the stator core 1, and the mounting table 22 is provided with a connecting part 221 connected with the insulating winding arm 21. In this embodiment, from the aspect of structural stability, the mounting table 22 fills the inner diameter of the stator core 1, which can effectively enhance the structural strength of the whole stator. Like a supporting framework, it makes the stator core 1 not easy to deform or displace when it bears various forces during the operation of the motor, ensuring the stable operation of the motor. At the same time, the connecting part 221 is connected with the insulating winding arm 21, further reinforcing the whole structure. It makes the components form an organic whole, reduces the vibration and noise caused by loose components, and prolongs the service life of the motor. In terms of electrical performance, the mounting table 22 optimizes the wiring and electrical connection inside the motor. The mounting table 22 provides a stable mounting position for the wiring PIN 4, making the wiring more regular and orderly, reducing the possibility of mutual interference between lines. Moreover, since the mounting table 22 is closely connected with the insulating winding arm 21, it can better ensure the insulation performance of the coil winding 3, prevent electrical faults such as electric leakage, and improve the safety and reliability of the motor operation.

[0023] The encapsulation support 2 is provided with a fixing table 23 on the side away from the mounting table 22, and the fixing table 23 is used for fixed installation of the encapsulation support 2. The shaft cavity 231 is provided at the shaft center of the fixing table 23, and one end of the shaft cavity 231 penetrates the mounting table 22. In this embodiment, from the perspective of structural stability, the fixing table 23 provides an additional fixed support point for the encapsulation support 2. This enables the encapsulation support 2 to be more stably installed in the corresponding position during motor operation, reducing displacement or loosening caused by vibration or external force impact. This helps to maintain the stability of the overall structure of the motor, ensures the relative position accuracy between the components of the motor, and thus improves the operation reliability and service life of the motor. The shaft cavity 231 at the shaft center of the fixing table 23 plays a key role. The shaft cavity 231 penetrates the mounting table 22 at one end, providing a precise channel for the installation and operation of the motor shaft. It can ensure that the shaft rotates accurately inside the motor, reducing friction and collision between the shaft and other components, reducing energy loss, and improving the efficiency of the motor. At the same time, it is beneficial to lubricate and maintain the shaft, further extending the service life of the shaft.

[0024] The mounting table 22 is provided with a jack 222, and the wiring PIN needle 4 is used to press the wire head of the coil winding 3 towards the jack 222 and fixed by welding. Specifically, the mounting table 22 is provided with a plurality of lightening grooves 223, and a sun muscle strip 224 is arranged between adjacent two lightening grooves 223, and the jack 222 is arranged at the end of the sun muscle strip 224 and close to the stator core 1. In this embodiment, the jack 222 on the mounting table 22 provides precise positioning for the wiring PIN needle 4. The wiring PIN needle 4 presses the wire head of the coil winding 3 towards the jack 222 and is fixed by welding, which can ensure the stability and reliability of the connection. It can reduce the contact resistance and reduce the loss of electrical energy during transmission, and improve the efficiency of the motor. Moreover, the design of the position of the jack 222 close to the stator core 1 is beneficial to shorten the path of the coil winding 3, further reduce the resistance, and enhance the electrical performance of the motor. The plurality of lightening grooves 223 arranged on the mounting table 22 play a role in reducing weight. Without affecting the overall strength of the mounting table 22, the lightening grooves 223 reduce the use of materials and reduce the overall weight of the motor, which is of great significance to some application scenarios with strict requirements on weight, such as aerospace, electric vehicles, etc. At the same time, the sun muscle strip 224 between adjacent two lightening grooves 223 not only ensures the structural strength of the mounting table 22, but also provides stable support for the jack 222. The existence of the sun muscle strip 224 enables the mounting table 22 to withstand greater external force and vibration, ensuring the stable operation of the motor under complex working conditions.

[0025] The wire hanging groove 41 of the wiring PIN 4 is oriented towards the axis of the stator core 1. In this embodiment, the design of the wire hanging groove 41 oriented towards the axis of the stator core 1 allows the wire ends of the coil winding 3 to be combined more tightly and regularly after being hung in the groove, in line with the electromagnetic force distribution law inside the motor, reducing the phenomenon of wire end loosening caused by external vibration or electromagnetic interference. When the motor is running, stable electrical connection can ensure the continuity and stability of current transmission, reduce the contact resistance, thereby reducing the heat and energy loss caused by excessive resistance, improving the efficiency and reliability of the motor. The wire hanging groove 41 oriented towards the axis helps to optimize the magnetic field distribution inside the motor. The magnetic field generated by the coil winding 3 can pass through the stator core 1 more concentratedly and orderly, reducing the magnetic leakage phenomenon. The magnetic flux of the motor is enhanced, the output torque and power of the motor are improved, and the electromagnetic noise and vibration are reduced, improving the running stability and quietness of the motor.

[0026] Referring to Figures 1-4 As shown in the figure, a reverse hooking process is used to prepare the reverse hooking structure of the motor stator, including the following steps: Step S1, preparing the stator core 1: stacking a plurality of stator iron sheets to form the stator core 1; Step S2, stator gluing: placing the stator core 1 into the gluing mold for injection molding to form the gluing support 2 on the outside of the stator core 1; Step S3, wiring PIN 4 assembly: simultaneously forming the mounting table 22 during injection molding, and pre-inserting the wiring PIN 4 on the mounting table 22; Step S4, winding preparation: winding on the insulating winding arm 21, and winding the wire ends of the coil winding 3 on the wire hanging groove 41 of the wiring PIN 4 after completing the winding; Step S5, wiring PIN 4 press-fitting: pressing the wiring PIN 4 into the mounting table 22, and making the wire ends of the coil winding 3 close to the surface of the mounting table 22; Step S6, fixed welding: welding the wire ends of the coil winding 3 and the wiring PIN 4 to make the wire ends of the coil winding 3 and the wiring PIN 4 fixedly connected.

[0027] In this embodiment, in step S1, a plurality of stator core laminations are formed into a stator core 1, ensuring the stability and integrity of the structure of the stator core 1. The stable stator core 1 provides a solid foundation for subsequent processes such as encapsulation and winding, reducing the possibility of wire disconnection caused by core deformation and other problems. Step S2 encapsulates the stator, forms an encapsulation support 2 outside the stator core 1, and covers the insulation winding arm 21 corresponding to the coil winding arm 11. The encapsulation support 2 not only provides insulation protection, but also enhances the strength and stability of the overall structure. During the pressing process of the connection PIN needle 4, it can buffer the influence of external force on the stator core 1 and the coil winding 3, reducing the risk of wire disconnection caused by external force. Step S3 simultaneously forms a mounting table 22 and pre-installs a connection PIN needle 4 during injection molding. Accurate mounting table 22 forming and pre-installing ensure the accuracy of the position of the connection PIN needle 4. This allows subsequent winding and pressing processes to proceed smoothly, avoiding unstable wire winding and disconnection caused by PIN needle position deviation. Step S4 winds the coil winding 3 on the insulation winding arm 21 and winds the wire around the wire hanging groove 41 of the connection PIN needle 4. The wire hanging groove 41 plays a role in preliminary fixing the wire. The wire is effectively constrained before pressing, preventing it from moving randomly. Step S5 presses the connection PIN needle 4 into the mounting table 22 and makes the wire close to the surface of the mounting table 22, further stabilizing the connection between the wire and the connection PIN needle 4. Through pressing, the friction and bonding force between the two are enhanced, reducing the probability of wire disconnection. Finally, step S6 fixes and welds the wire of the coil winding 3 and the connection PIN needle 4 together. The connection point formed by welding has high strength and stability, fundamentally eliminating the problem of wire disconnection during connection PIN needle 4 pressing, ensuring the reliability and stability of the motor stator inverted hook undercut structure.

[0028] In step S3, before the pin is pre-installed to the encapsulated core, the device realizes needle feeding → extrusion → insertion → cutting. The extrusion is realized by a cylinder connected to a cam mechanism and a pressure groove die. The pressure groove depth can be controlled at 0.08-0.15mm, and the groove width increases from 0.8mm to 0.9mm. The pressure groove die has sharp corners to achieve clear groove marks and achieve the best effect of hanging the wound coil.

[0029] In another embodiment, the connecting pin 4 needs to be pretreated before being pre-installed in step S3, the pretreatment includes electrolytic polishing, micro-arc oxidation and chamfering of the wire hanging groove 41 in sequence, wherein the electrolytic polishing adopts a current density of 8 A / dm2 and a time of 90 s, so that the surface roughness Ra of the connecting pin 4 is less than or equal to 0.2 μm; the micro-arc oxidation is realized by a voltage of 350 V and a film thickness of 10-15 μm, so that the insulation resistance is greater than 100 MΩ; and the chamfering of the wire hanging groove 41 forms an R0.1 mm arc to prevent scratching the enameled wire. In this embodiment, the electrolytic polishing adopts a current density of 8 A / dm2 and a time of 90 s, so that the surface roughness Ra of the connecting pin 4 is less than or equal to 0.2 μm. The surface quality of the connecting pin 4 is greatly improved. The smooth surface reduces the frictional resistance between the connecting pin 4 and the wire head of the coil winding 3, so that the wire head is more smooth during winding and can be more closely attached to the connecting pin 4. At the same time, the smooth surface also reduces the risk of scratching or wearing the wire head due to uneven surface during subsequent press fitting, thereby improving the stability and reliability of the connection between the wire head and the connecting pin 4. The micro-arc oxidation is realized by a voltage of 350 V and a film thickness of 10-15 μm, so that the insulation resistance is greater than 100 MΩ. The connecting pin 4 has good insulation performance. During the operation of the motor, current leakage can be effectively prevented, and the safety hazard and performance degradation problem caused by the current leakage can be avoided. At the same time, the protective film formed by the micro-arc oxidation also has a certain hardness and wear resistance, which can enhance the corrosion resistance of the connecting pin 4 and prolong the service life thereof. The chamfering of the wire hanging groove 41 forms an R0.1 mm arc, which can effectively prevent scratching the enameled wire. During the winding process, the enameled wire is very fragile, and once it is scratched, the insulation performance will be damaged, thereby affecting the normal operation of the motor. The chamfered wire hanging groove 41 provides a smooth winding path for the enameled wire, protects the integrity of the enameled wire, and ensures the electrical performance of the coil winding 3.

[0030] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the patent of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A motor stator undercut texture structure, characterized by: It includes a stator core, a rubber-coated bracket, a coil winding and a wiring PIN needle. The stator core is evenly distributed with multiple coil winding arms in a circumferential direction. The rubber-coated bracket is covered on the outside of the stator core, and the corresponding coil winding arms are covered with insulating winding arms. The coil winding is wound on the insulating winding arms. The rubber-coated bracket is located on the inner diameter of the stator core and is provided with a mounting platform. There are multiple wiring PIN needles, and the multiple wiring PIN needles are arranged in a circumferential direction on the mounting platform. The wiring PIN needles are provided with wire hanging grooves for winding and fixing the wire ends of the coil winding.

2. The motor stator undercut texture structure according to claim 1, characterized in that: A yoke portion is provided at the end of the coil winding arm, and an expansion portion is provided on the insulating winding arm. The expansion portion is covered on the yoke portion.

3. The motor stator undercut texture structure according to claim 1, characterized in that: The mounting platform is filled with the inner diameter of the stator core, and the mounting platform is provided with a connection portion connected to the insulating winding arm.

4. The motor stator undercut texture structure according to claim 1, characterized in that: The rubber-coated bracket is provided with a fixing platform on a side opposite to the mounting platform, and the fixing platform is used for fixing and installing the rubber-coated bracket.

5. The motor stator undercut texture structure according to claim 4, characterized in that: A rotating shaft cavity is provided at the axis center of the fixing platform, and one end of the rotating shaft cavity passes through the mounting platform.

6. The motor stator undercut texture structure according to claim 1, characterized in that: The mounting platform is provided with a socket, and the connection PIN needle is used to press the wire end of the coil winding toward the socket and fix it by welding.

7. The motor stator undercut texture structure according to claim 6, characterized in that: The mounting platform is provided with a plurality of weight-reducing grooves, a solar rib is provided between two adjacent weight-reducing grooves, and the insertion hole is provided at the end of the solar rib and close to the stator core.

8. The motor stator undercut texture structure according to claim 1, characterized in that: The wire hanging groove of the connection PIN needle faces the axis of the stator core.

9. A process for producing an undercut textured pattern for a motor stator according to any one of claims 1 to 8, characterized in that: The steps include: Step S1, preparing a stator core: laminating a plurality of stator iron sheets to form a stator core; Step S2, stator rubber coating: placing the stator core into a rubber coating mold for injection molding, and forming a rubber coating bracket on the outside of the stator core; Step S3, assembling the wiring PIN pins: forming the mounting platform simultaneously during the injection molding process, and pre-inserting the wiring PIN pins on the mounting platform; Step S4, winding preparation: winding is performed on the insulating winding arm, and after the winding is completed, the coil winding wire end is wound on the wire hanging groove of the connection PIN pin; Step S5, press-fitting the connection PIN pins: press-fitting the connection PIN pins into the mounting table, and making the ends of the coil windings face toward the surface of the mounting table; Step S6, fixed welding: welding the wire ends of the coil windings and the connection PIN needles so that the wire ends of the coil windings and the connection PIN needles are fixedly connected.

10. The undercut texturing process according to claim 9, characterized in that: In step S3, before the pin is pre-installed into the stator core, the equipment is used to realize the needle feeding → extrusion → insertion → cutting, wherein the extrusion is realized by a cylinder connecting the cam mechanism and the groove pressing mold. The groove pressing depth can be controlled at 0.08-0.15mm, and the groove width is increased from 0.8mm to 0.9mm. The groove pressing mold has its own edges and corners to achieve clear groove marks.

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