Motor stator barbed knitting structure

Abstract

This utility model relates to the field of motor stator technology, specifically a stator stator barbed wire structure, including a stator core, a rubber-coated bracket, coil windings, and connection pins. The stator core has multiple coil arms evenly distributed in a circumferential direction. The rubber-coated bracket covers the outside of the stator core and has insulating arms corresponding to the coil arms. The coil windings are wound on the insulating arms. A mounting platform is provided on the rubber-coated bracket within the inner diameter of the stator core. Multiple connection pins are provided, arranged circumferentially on the mounting platform. Each connection pin has a wire-holding groove for securing the coil winding ends. During the press-fit process, even under certain external impact, the grooves prevent the wire ends from sliding freely, ensuring a secure connection between the wire ends and the connection pins.

Description

Technical Field

[0001] This utility model relates to the field of motor stator technology, and in particular to a motor stator barbed knitting structure. Background Technology

[0002] Electric motors are widely used in numerous fields such as industrial production, transportation, and smart homes. As a crucial component of the motor, the performance of the motor stator directly affects the overall operating efficiency. In existing motor stator technology, the connection between the winding ends and the pins has always been a challenging problem in the industry. Traditional connection methods typically involve simple winding or soldering; however, these methods have significant shortcomings. During motor operation, the motor itself vibrates, and external environmental factors further contribute to the ease with which the connection between the winding ends and the pins can loosen.

[0003] In the production of motor stators, the press-fitting process is a crucial step. However, the unstable connection between the winding wire ends and the pins is a particularly prominent issue during press-fitting. Existing connection structures often cannot withstand the significant pressure generated during press-fitting, causing the wire ends to detach from the pins. Once this happens, reconnection is necessary, which not only increases production time and labor costs but also affects product production efficiency and quality stability. Therefore, developing a motor stator structure and connection technology that can effectively solve the problem of unstable connection between the winding wire ends and the pins and prevent detachment during press-fitting has become a critical issue that urgently needs to be addressed in the motor industry. Utility Model Content

[0004] To solve the above problems, this utility model has a motor stator barbed knitting structure that prevents the wire end from sliding freely even when subjected to a certain external impact during the pressing process, ensuring a firm connection between the wire end and the wiring pin.

[0005] The technical solution adopted by this utility model is: a stator barbed knitting structure for a motor, including a stator core, a rubber-coated bracket, coil windings, and wiring pins. The stator core has multiple coil winding arms evenly distributed in a circumferential direction. The rubber-coated bracket covers the outside of the stator core and covers the coil winding arms with insulating winding arms. The coil windings are wound on the insulating winding arms. The rubber-coated bracket is provided with a mounting platform located on the inner diameter of the stator core. Multiple wiring pins are provided and are arranged in a circumferential direction on the mounting platform. The wiring pins are provided with wire hanging grooves for winding and fixing the wire ends of the coil windings.

[0006] A further improvement to the above scheme is that a magnetic yoke is provided at the end of the coil arm, and an expansion portion is provided on the insulating arm, with the expansion portion covering the magnetic yoke.

[0007] A further improvement to the above scheme is that the mounting platform fills the inner diameter of the stator core, and the mounting platform is provided with a connecting part to connect with the insulating winding arm.

[0008] A further improvement to the above solution is that a fixing platform is provided on the side of the rubber-coated bracket opposite to the mounting platform, and the fixing platform is used for fixing and installing the rubber-coated bracket.

[0009] A further improvement to the above scheme is that a rotating shaft cavity is provided at the center of the fixed platform, and one end of the rotating shaft cavity passes through the mounting platform.

[0010] A further improvement to the above solution is that the mounting platform is provided with a socket, and the wiring pin is used to press the wire end of the coil winding toward the socket and fix it by welding.

[0011] A further improvement to the above scheme is that the mounting platform is provided with multiple weight reduction grooves, and a sun rib is provided between two adjacent weight reduction grooves. The insertion hole is located at the end of the sun rib and close to the stator core.

[0012] A further improvement to the above scheme is that the hanging groove of the wiring PIN is oriented towards the axis of the stator core.

[0013] A barbed knitting process for preparing the aforementioned barbed knitting structure of the motor stator includes the following steps:

[0014] Step S1, preparing the stator core: stacking multiple stator iron sheets to form a stator core;

[0015] Step S2, stator coating: The stator core is placed into the coating mold for injection molding, and a coating bracket is formed on the outside of the stator core;

[0016] Step S3, PIN assembly: During the injection molding process, the mounting platform is formed simultaneously, and the PIN is pre-inserted onto the mounting platform.

[0017] Step S4, winding preparation: Winding is performed on the insulated winding arm. After the winding is completed, the wire ends of the coil winding are wound on the hanging groove of the terminal pin.

[0018] Step S5, Pin Pressing: Press the pin into the mounting platform, so that the wire end of the coil winding is close to the surface of the mounting platform;

[0019] Step S6, Fixed Soldering: Solder the wire ends of the coil winding to the terminal pins to fix the wire ends of the coil winding to the terminal pins.

[0020] A further improvement to the above scheme is that, in step S3, the wiring pins need to be pre-treated before pre-insertion. The pre-treatment includes electrolytic polishing, micro-arc oxidation, and chamfering of the hanging groove in sequence. Electrolytic polishing uses a current density of 8A / dm² and a time of 90s to make the surface roughness Ra≤0.2μm; micro-arc oxidation uses a voltage of 350V and a film thickness of 10-15μm to achieve an insulation resistance >100MΩ; and the hanging groove chamfering forms an arc of R0.1mm to prevent scratching the enameled wire.

[0021] The beneficial effects of this utility model are:

[0022] Compared to existing motor stators, the rubber-coated bracket of this invention covers the outside of the stator core, and the corresponding coil winding arm is covered with an insulating arm, providing a good insulation environment for the coil winding, avoiding short circuits between the winding and the core, and enhancing the stability of the entire structure. During the pressing process of the wiring pins, the rubber-coated bracket provides stable support for the stator core and coil winding, reducing structural deformation caused by external pressure, thereby lowering the risk of wire detachment. The wire-holding groove on the wiring pin is an important design feature to prevent wire detachment. When the coil winding wire end is wound in the groove, the groove provides a certain degree of restraint. During the pressing process, even under certain external impact, the groove prevents the wire end from sliding freely, ensuring a firm connection between the wire end and the wiring pin. Multiple wiring pins are arranged in a ring on the mounting platform, and this ring distribution makes the entire wiring structure more rational. It can evenly distribute the tension of the coil winding, preventing the wire end from detaching from the wiring pin due to excessive local tension. Meanwhile, the circumferential arrangement facilitates the connection and wiring of the coil windings, improving production efficiency. Multiple coil arms are evenly distributed in a circumferential pattern on the stator core, working in conjunction with the insulated arms of the rubber-coated bracket and the circumferentially arranged wiring pins to form a stable overall structure. During the pressing of the wiring pins, the various components cooperate and work together, further enhancing the reliability of the entire structure and effectively preventing the coil winding ends from coming off the wiring pins, ensuring the normal operation and stable performance of the motor stator. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the barbed knitting structure of the motor stator of this utility model;

[0024] Figure 2 for Figure 1 A three-dimensional schematic diagram of the stator barbed knit structure of Zhongdian Motor from another perspective;

[0025] Figure 3 for Figure 1 A front view schematic diagram of the stator's inverted hook and knit structure.

[0026] Explanation of reference numerals in the attached drawings: Stator core 1, Coil arm 11, Magnetic yoke 12, Rubber-coated bracket 2, Insulating arm 21, Expansion part 211, Mounting platform 22, Connecting part 221, Insertion hole 222, Weight reduction groove 223, Sun rib 224, Fixing platform 23, Rotating shaft cavity 231, Coil winding 3, Wiring pin 4, Hanging groove 41. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0029] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-3As shown, in one embodiment of this utility model, a stator barbed knitting structure for a motor is disclosed, comprising a stator core 1, a rubber-coated bracket 2, a coil winding 3, and wiring pins 4. The stator core 1 has multiple coil arms 11 evenly distributed in a circumferential direction. The rubber-coated bracket 2 covers the outside of the stator core 1 and has insulating arms 21 corresponding to the coil arms 11. The coil winding 3 is wound on the insulating arms 21. A mounting platform 22 is provided on the inner diameter of the rubber-coated bracket 2 within the stator core 1. Multiple wiring pins 4 are provided, arranged circumferentially on the mounting platform 22. Each wiring pin 4 has a wire-hanging groove 41 for securing the wire ends of the coil winding 3. In this embodiment, the rubber-coated bracket 2 covers the outside of the stator core 1, and the insulating arms 21 corresponding to the coil arms 11 provide a good insulation environment for the coil winding 3, avoiding short circuits between the winding and the core, and enhancing the stability of the entire structure. During the pressing process of the wiring PIN 4, the rubber-coated bracket 2 provides stable support for the stator core 1 and the coil winding 3, reducing structural deformation caused by external pressure and thus lowering the risk of wire detachment. The wire-holding groove 41 on the wiring PIN 4 is an important design feature to prevent wire detachment. When the wire end of the coil winding 3 is wound in the wire-holding groove 41, the groove can limit the wire end. During the pressing process, even if subjected to a certain external impact, the groove can prevent the wire end from sliding freely, ensuring a firm connection between the wire end and the wiring PIN 4. Multiple wiring PINs 4 are arranged in a ring on the mounting platform 22, and the ring distribution makes the entire wiring structure more reasonable. It can evenly distribute the tension of the coil winding 3, preventing the wire end from detaching from 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, improving production efficiency. The stator core 1 has multiple coil arms 11 evenly distributed in a circumferential pattern. These, along with the insulated coil arms 21 of the rubber-coated bracket 2 and the circumferentially arranged wiring pins 4, form a stable overall structure. During the pressing of the wiring pins 4, the various components cooperate and work together, further enhancing the reliability of the entire structure. This effectively prevents the wire ends of the coil windings 3 from coming off the wiring pins 4, ensuring the normal operation and stable performance of the motor stator.

[0030] A magnetic yoke 12 is provided at the end of the coil winding arm 11, and an expansion portion 211 is provided on the insulating winding arm 21, which covers the magnetic yoke 12. In this embodiment, from the perspective of the magnetic circuit, the presence of the magnetic yoke 12 can optimize the magnetic circuit distribution of the motor. The magnetic yoke can guide and constrain the magnetic lines of force, making the magnetic lines of force pass through the magnetic yoke 12 more concentratedly, reducing magnetic leakage. This helps to improve the permeability and electromagnetic conversion efficiency of the motor, thereby improving the overall performance of the motor and enabling it to convert electrical energy into mechanical energy more efficiently. In terms of insulation, the expansion portion 211 of the insulating winding arm 21 covers the magnetic yoke 12, providing reliable insulation protection for the magnetic yoke 12. This can prevent electrical short circuits between the coil winding 3 and the magnetic yoke 12, avoiding motor failures and safety hazards caused by short circuits. Moreover, the design of the expansion portion 211 increases the insulation area, further enhancing the insulation effect and ensuring the stable operation of the motor under different operating conditions.

[0031] The mounting platform 22 fills the inner diameter of the stator core 1, and is provided with a connecting part 221 that connects to the insulating winding arm 21. In this embodiment, from the perspective of structural stability, the mounting platform 22 filling the inner diameter of the stator core 1 effectively enhances the overall structural strength of the stator. Like a supporting skeleton, it prevents the stator core 1 from deforming or displacing when subjected to various forces during motor operation, ensuring stable motor operation. At the same time, the connection part 221 and the insulating winding arm 21 further reinforce the entire structure. This forms an organic whole between components, reducing vibration and noise caused by loose components and extending the service life of the motor. In terms of electrical performance, the mounting platform 22 optimizes the internal wiring and electrical connections of the motor. The mounting platform 22 provides a stable mounting position for the wiring PIN 4, making the wiring more neat and orderly, and reducing the possibility of mutual interference between lines. Moreover, because the mounting platform 22 is tightly connected to the insulating winding arm 21, it can better ensure the insulation performance of the coil winding 3, prevent electrical faults such as leakage, and improve the safety and reliability of motor operation.

[0032] A fixed platform 23 is provided on the side opposite to the mounting platform 22 of the rubber-coated bracket 2. The fixed platform 23 is used for the fixed installation of the rubber-coated bracket 2. A shaft cavity 231 is provided at the center of the fixed platform 23, and one end of the shaft cavity 231 passes through the mounting platform 22. In this embodiment, from the perspective of structural stability, the fixed platform 23 provides an additional fixed support point for the rubber-coated bracket 2. This allows the rubber-coated bracket 2 to be installed more stably in the corresponding position during motor operation, reducing displacement or loosening caused by vibration or external impact. This helps maintain the stability of the overall motor structure, ensures the relative positional accuracy between the various components of the motor, and thus improves the operational reliability and service life of the motor. The shaft cavity 231 at the center of the fixed platform 23 plays a key role. One end of the shaft cavity 231 passes through the mounting platform 22, providing a precise channel for the installation and operation of the motor shaft. It ensures that the shaft rotates accurately inside the motor, reduces friction and collision between the shaft and other components, reduces energy loss, and improves the efficiency of the motor. At the same time, it is beneficial for lubricating and maintaining the shaft, further extending the service life of the shaft.

[0033] The mounting platform 22 is provided with a socket 222. The wiring PIN 4 is used to press the end of the coil winding 3 toward the socket 222 and fix it by welding. Specifically, the mounting platform 22 is provided with multiple weight-reducing slots 223, and a sun rib 224 is provided between two adjacent weight-reducing slots 223. The socket 222 is located at the end of the sun rib 224 and close to the stator core 1. In this embodiment, the socket 222 on the mounting platform 22 provides precise positioning for the wiring PIN 4. The wiring PIN 4 presses the end of the coil winding 3 toward the socket 222 and fixes it by welding, which can ensure the stability and reliability of the connection. It can reduce contact resistance, reduce power loss during transmission, and improve the efficiency of the motor. Moreover, the design of the socket 222 position close to the stator core 1 helps to shorten the path of the coil winding 3, further reduce resistance, and enhance the electrical performance of the motor. The multiple weight-reducing slots 223 provided on the mounting platform 22 play a role in reducing weight. Without compromising the overall strength of the mounting platform 22, the weight-reducing groove 223 reduces material usage and lowers the overall weight of the motor, which is significant for applications with strict weight requirements, such as aerospace and electric vehicles. Meanwhile, the sun ribs 224 between adjacent weight-reducing grooves 223 not only ensure the structural strength of the mounting platform 22 but also provide stable support for the insertion hole 222. The presence of the sun ribs 224 allows the mounting platform 22 to withstand greater external forces and vibrations, ensuring stable motor operation under complex conditions.

[0034] The groove 41 of the connecting pin 4 faces the axis of the stator core 1. In this embodiment, the design of the groove 41 facing the axis of the stator core 1 allows the coil winding 3 wire end to engage more tightly and neatly with the connecting pin 4 after being hooked into the groove. This conforms to the electromagnetic force distribution law inside the motor and reduces wire loosening caused by external vibration or electromagnetic interference. When the motor is running, a stable electrical connection ensures the continuity and stability of current transmission, reduces contact resistance, thereby reducing heat generation and energy loss caused by excessive resistance, and improving the efficiency and reliability of the motor. The groove 41 facing the axis helps optimize the magnetic field distribution inside the motor. This allows the magnetic field generated by the coil winding 3 to pass through the stator core 1 more concentratedly and orderly, reducing magnetic leakage. This enhances the magnetic flux of the motor, increases the output torque and power of the motor, and also reduces electromagnetic noise and vibration, improving the smoothness and quietness of motor operation.

[0035] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A stator barbed knitting structure for an electric motor, characterized in that: The device includes a stator core, a rubber-coated bracket, coil windings, and connection pins. The stator core has multiple coil winding arms evenly distributed in a circumferential direction. The rubber-coated bracket covers the outside of the stator core and has insulating winding arms covering the corresponding coil winding arms. The coil windings are wound on the insulating winding arms. The rubber-coated bracket has a mounting platform located on the inner diameter of the stator core. Multiple connection pins are provided and arranged in a circumferential direction on the mounting platform. The connection pins have wire hanging grooves for winding and fixing the wire ends of the coil windings.

2. The stator barbed knitting structure of the motor according to claim 1, characterized in that: The end of the coil arm is provided with a magnetic yoke, and the insulating arm is provided with an expansion portion, which covers the magnetic yoke.

3. The stator barbed knitting structure of the motor 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 connecting part to connect with the insulating winding arm.

4. The stator barbed knitting structure of the motor according to claim 1, characterized in that: The rubber-coated bracket is provided with a fixing platform on the side opposite to the mounting platform, and the fixing platform is used to fix the rubber-coated bracket in place.

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

6. The stator barbed knitting structure of the motor according to claim 1, characterized in that: The mounting platform is provided with a socket, and the wiring pin is used to press the end of the coil winding toward the socket and fix it by welding.

7. The stator barbed knitting structure of the motor according to claim 6, characterized in that: The mounting platform is provided with multiple weight reduction slots, and a sun rib is provided between two adjacent weight reduction slots. The insertion hole is located at the end of the sun rib and close to the stator core.

8. The stator barbed knitting structure of the motor according to claim 1, characterized in that: The wire-hanging groove of the wiring PIN is oriented towards the axis of the stator core.

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