Stator welding spot protection structure and motor thereof

Abstract

The utility model discloses a stator welding spot protection structure and a motor thereof, the stator welding spot protection structure comprises a stator iron core, an insulation frame, a PCB, a protection cover and a stator winding wound on the insulation frame, a plurality of pin columns with jacks are arranged in the insulation frame at intervals, pins are correspondingly inserted in the jacks, the PCB is lapped on the upper surfaces of the pin columns, and the protection cover is arranged on the insulation frame. The stator winding is provided with a contact pin and is provided with a through hole through which the contact pin passes, the stator winding, the contact pin and the PCB are welded to form a conduction welding point, the protection cover covers the PCB, the protection cover is provided with an accommodating cavity with a bottom opening, and the accommodating cavity is filled with sealing insulation glue capable of covering the conduction welding point. A plurality of glue injection notches communicated with the containing cavity are distributed in the side face of the insulating frame at intervals. Most of the welding spot protection structures designed by the utility model are manufactured by automatic equipment, so that the labor intensity of workers and the requirements on working skills are greatly reduced, and the purposes of low cost, high production efficiency and stable quality can be achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of motors for household appliances such as electric fans, range hoods, air purifiers, and bathroom heaters, specifically a stator weld point protection structure and its motor. Background Technology

[0002] With the significant rise in copper prices, the cost pressure on the motor industry is increasing. To meet the industry's demands for energy-saving and emission-reducing motor development, motor manufacturers have had to consider the issue from the perspective of motor materials. Since the iron core has a significant impact on performance and is therefore disregarded, the only option, while minimizing impact on motor performance and reducing costs, is to replace the motor windings with copper enameled wire or aluminum enameled wire or copper-clad aluminum enameled wire. Because of the chemical and physical properties of aluminum in aluminum enameled wire or copper-clad aluminum enameled wire, the welding process is crucial; poor welding directly affects the quality of the motor.

[0003] Existing household appliances such as electric fans, range hoods, air purifiers, and bathroom heaters typically use aluminum or copper-clad aluminum wire motors with conventional iron-shell structures and distributed windings. The stator connection involves winding enameled round wire onto pins, then connecting them using tinning (soldering). The solder joints are then individually sealed with heat-shrink tubing. This entire production process is cumbersome, inefficient, and entirely manual, requiring high levels of skill and labor intensity from workers. Furthermore, the high scrap rate during manual operation leads to high production costs. It is also difficult to guarantee the quality of the solder joints at the connection points between the aluminum enameled wire and the copper-clad aluminum wire, resulting in issues such as oxidation and wire breakage, leading to problems like lack of power and short lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide a stator weld point protection structure and its motor in order to solve the problems mentioned above.

[0005] The technical solution adopted in this utility model is as follows:

[0006] In a first aspect, a stator solder joint protection structure is provided, comprising a stator core, an insulating frame, a PCB board, a cover, and a stator winding wound around the insulating frame. The insulating frame contains a plurality of pin posts with insertion holes spaced apart, each insertion hole corresponding to a pin. The PCB board overlaps the upper surface of the pin posts and has through holes for the pins to pass through. The stator winding, pins, and PCB board are welded together to form conductive solder joints. The cover covers the PCB board and has a receiving cavity with a bottom opening, filled with a sealing insulating adhesive capable of covering the conductive solder joints.

[0007] In a preferred embodiment, the insulating frame has a plurality of injection notches spaced apart on its side and communicating with the receiving cavity, the injection notches being located below the cover.

[0008] In a preferred embodiment, the sidewall of the cover protrudes inward to form a plurality of limiting bosses, and the PCB board has a notch that can be engaged with the limiting bosses.

[0009] In a preferred embodiment, the inner walls on both sides of the cover are provided with a plurality of buckles that snap onto the back of the PCB board, and the back of the cover protrudes downward to form a support post that abuts against the front of the PCB board.

[0010] In a preferred embodiment, the insulating frame is nested on the stator core, and the insulating frame is made of a material with insulating, pressure-resistant and heat-resistant properties.

[0011] In a preferred embodiment, the cover is made of a material that is transparent, insulating, pressure-resistant, and heat-resistant.

[0012] In a preferred embodiment, the PCB board has a plurality of positioning holes along its length, and the pin post is integrally provided with a positioning post that can pass through the positioning holes.

[0013] A second aspect of this utility model is an electric motor, including a stator solder joint protection structure as described above.

[0014] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are as follows: the stator weld point protection structure is mostly manufactured by automated equipment, which greatly reduces the labor intensity and skill requirements of workers, achieving low cost, high production efficiency, and stable quality. Furthermore, the stator weld point is completely wrapped inside the cover with sealing insulating glue, which not only completely isolates the weld point from the external air and prevents oxidation, but also enhances the connection reliability of the weld point, improves the risk of wire breakage and loosening at the connection, and ensures product quality. Attached Figure Description

[0015] Figure 1 This is an exploded three-dimensional structural diagram of the entire utility model;

[0016] Figure 2 This is a simplified three-dimensional structural diagram of the present invention.

[0017] Figure 3 This is a simplified schematic diagram of the exploded three-dimensional structure of the present invention viewed from another angle;

[0018] Figure 4 This is a simplified three-dimensional structural diagram of the protective cover in this utility model.

[0019] The markings in the diagram are: 1-Stator core, 2-Insulating frame, 21-Pin post, 211-Positioning post, 22-Glue injection notch, 3-Pin, 4-Stator winding, 5-PCB board, 51-Notch, 6-Cover, 61-Limiting boss, 62-Support post, 63-Inverted, 7-Sealing insulation glue, 8-Conductive solder joint. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0021] Reference Figure 1-4 A stator solder joint protection structure includes a stator core 1, an insulating frame 2, a PCB board 5, a cover 6, and a stator winding 4 wound on the insulating frame 2. The insulating frame 2 has multiple pin posts 21 with insertion holes spaced apart, and pins 3 are inserted into the corresponding holes. The PCB board 5 overlaps the upper surface of the pin posts 21 and has through holes for the pins 3 to pass through. The stator winding 4, the pins 3, and the PCB board 5 are welded to form conductive solder joints 8. The cover 6 covers the PCB board 5 and has a receiving cavity with a bottom opening, filled with sealing insulating glue 7 to cover the conductive solder joints 8. The stator winding 4 is wound on the insulating frame 2 with the pins 3 inserted, and its head is fixedly wrapped around the pins 3. The surface of the stator winding 4 wrapped around the pins 3 is then removed using equipment. The PCB board 5 with the power cord leads soldered on is placed on the pin post 21 and soldered together using a soldering machine to achieve electrical connection between the stator winding 4 and external components. A cover 6 is installed on the soldered PCB board 5, the stator is flipped over using a flipping machine, and a sealing insulating glue 7 is injected into the receiving cavity using a glue injection machine. The sealing insulating glue 7 completely covers the conductive solder joint 8 and solidifies completely inside the cover 6. This not only completely isolates the connection point from the external air, but also enhances the connection reliability, improves the risk of wire breakage and loosening at the connection point, and ensures product quality. Secondly, most of the production is completed by automated equipment, which greatly reduces the labor intensity and skill requirements of the workers, and can achieve low cost, high production efficiency, and stable quality.

[0022] Among them, stator winding 4 is formed by winding aluminum enameled wire or copper-clad aluminum enameled wire.

[0023] It should be mentioned that the welding equipment, glue injection equipment, and flipping equipment mentioned above are all existing and well-known technologies, and will not be specifically described here.

[0024] In one embodiment, the insulating frame 2 has a plurality of injection notches 22 that are connected to the receiving cavity distributed at intervals on its side. The injection notches 22 are located below the cover 6. The injection machine can inject sealing insulating glue 7 into the receiving cavity from the plurality of injection notches 22 on the insulating frame 2. Since there is a certain distance between the injection notches 22, the uniformity of filling the sealing insulating glue 7 can be guaranteed.

[0025] Reference Figure 4 As shown, the side wall of the cover 6 protrudes inward to form several limiting bosses 61. The PCB board 5 has a notch 51 that can be engaged with the limiting bosses 61. During assembly, the limiting bosses 61 of the cover 6 are engaged with the notch 51 of the PCB board 5, which can prevent the cover 6 from rotating circumferentially and play an auxiliary positioning role for the cover 6. There is at least one limiting boss 61, and the specific number is not limited here.

[0026] In one embodiment, the inner walls on both sides of the cover 6 are provided with a plurality of buckles 63 that snap onto the back of the PCB board 5. The back of the cover 6 protrudes downward to form a support post 62 that abuts against the front of the PCB board 5. The support post 62 supports the front of the PCB board 5, and the buckles 63 snap onto the back of the PCB board 5 to ensure that the cover 6 can be stably fixed on the PCB board 5. Preferably, there are 4 buckles 63 and 2 support posts 62, but neither is limited.

[0027] In one embodiment, the insulating frame 2 is nested on the stator core 1. The insulating frame 2 is made of a material with insulating, pressure-resistant and heat-resistant properties, and can provide insulation for the stator winding 4 wound on the insulating frame 2. The insulating frame 2 is preferably made of nylon material, but can also be made of other materials with insulating, pressure-resistant and heat-resistant properties.

[0028] In one embodiment, the cover 6 is made of a material with transparent, insulating, pressure-resistant and heat-resistant properties. The cover 6 is preferably made of transparent nylon material, which facilitates monitoring the filling and solidification of the sealing insulating adhesive 7 inside the cover 6, and ensures that the connection point is completely isolated from the outside air.

[0029] In one embodiment, the PCB board 5 has a plurality of positioning holes along its length direction, and the pin post 21 is integrally provided with a positioning post 211 that can pass through the positioning holes. Through the cooperation of the positioning holes and the positioning post 211, the PCB board 5 can be stably fixed on the pin post 21.

[0030] This utility model embodiment also provides an electric motor, including a rotor (not shown in the figure) and a stator weld point protection structure as described above.

[0031] In summary, most of the stator weld point protection structures described above are manufactured by automated equipment, which greatly reduces the labor intensity and skill requirements of workers. This results in low cost, high production efficiency, and stable quality. Furthermore, the stator weld point is completely covered inside the cover 6 by the sealing insulating adhesive 7, which not only completely isolates the weld point from the external air and prevents oxidation, but also enhances the connection reliability of the weld point and ensures product quality.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stator weld point protection structure, characterized in that, The device includes a stator core, an insulating frame, a PCB board, a cover, and a stator winding wound around the insulating frame. The insulating frame has multiple pin posts with insertion holes spaced apart, and pins are inserted into the insertion holes. The PCB board overlaps the upper surface of the pin posts and has through holes for the pins to pass through. The stator winding, pins, and PCB board are welded to form conductive solder joints. The cover is placed over the PCB board and has a receiving cavity with a bottom opening, which is filled with sealing insulating glue that covers the conductive solder joints.

2. The stator weld point protection structure as described in claim 1, characterized in that: The insulating frame has multiple injection notches spaced apart on its side, which are connected to the receiving cavity. The injection notches are located below the cover.

3. The stator weld point protection structure as described in claim 1, characterized in that: The protective cover has several limiting bosses protruding inward on its sidewall, and the PCB board has notches that can be engaged with the limiting bosses.

4. The stator weld joint protection structure as described in claim 1, characterized in that: The inner walls on both sides of the cover are provided with several buckles that snap onto the back of the PCB board, and the back of the cover protrudes downward to form a support post that abuts against the front of the PCB board.

5. The stator weld point protection structure as described in claim 1, characterized in that: The insulating frame is nested on the stator core, and the insulating frame is made of a material with insulating, pressure-resistant and heat-resistant properties.

6. The stator weld point protection structure as described in claim 1, characterized in that: The cover is made of a material that is transparent, insulating, pressure-resistant, and heat-resistant.

7. The stator weld point protection structure as described in claim 1, characterized in that: The PCB board has a plurality of positioning holes along its length, and the pin post is integrally provided with a positioning post that can pass through the positioning holes.

8. An electric motor, characterized in that, Includes a stator solder joint protection structure as described in any one of claims 1 to 7.

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