Slot wedge structure and electric machine

Abstract

The utility model provides a kind of slot wedge structure and motor, slot wedge structure includes: slot wedge body, slot wedge body is used to be inserted in the inner side of stator core tooth slot, slot is set on the slot wedge body for placing at least part stator winding Placement slot;Connecting component, connecting component is connected with slot wedge body, connecting component is set with the clamping portion for the power cord of stator winding connection and is clamped, clamping portion includes the clamping slot for clamping power cord, the side of slot wedge body close to connecting component is provided with the communication port respectively communicating placement slot and clamping slot, to be used for power cord to pass through, to solve the injection pressure of motor in prior art when injection is larger, easily leading to the problem of the fracture of winding.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a slot wedge structure and a motor. Background Technology

[0002] Plastic-encapsulated motors are characterized by their small size, light weight, low noise, and good insulation safety. By using an injection molding machine to spray and pressurize engineering plastic encapsulation material, the stator components, windings, and slot wedges are sealed and molded as a whole, achieving excellent insulation performance.

[0003] In existing manufacturing processes, the stator winding terminals are wound and connected to the power cord before the injection molding motor, and then this connection is inserted into the slot wedge cavity. However, due to the high injection pressure of the injection molding machine and the limited space in the slot wedge, the high pressure rapidly squeezes the molding compound, which impacts the winding terminals and the power cord. Furthermore, the thin wire diameter of the winding makes it prone to breakage, resulting in a high production scrap rate. At the same time, the power cord is easily displaced by the impact of the injection pressure, which in turn stretches the winding terminals, further increasing the risk of winding breakage. Utility Model Content

[0004] The main purpose of this utility model is to provide a slot wedge structure and a motor to solve the problem that the high injection pressure during injection molding of motors in the prior art can easily lead to winding breakage.

[0005] To achieve the above objectives, according to one aspect of the present invention, a slot wedge structure is provided, comprising: a slot wedge body for insertion into a toothed groove on the inner side of a stator core, the slot wedge body having a placement groove for placing at least a portion of a stator winding; a connecting member connected to the slot wedge body, the connecting member having a snap-fit ​​portion for snapping a power line connected to the stator winding, the snap-fit ​​portion including a snap-fit ​​groove for snapping the power line, and a connecting opening on the side of the slot wedge body near the connecting member for passing through the placement groove and the snap-fit ​​groove respectively.

[0006] Furthermore, at least one side of the groove wedge body is provided with a ventilation grille, which is connected to the placement groove.

[0007] Furthermore, ventilation grilles are provided on both sides of the wedge body in the width direction; and / or, the ventilation grilles include a plurality of ventilation holes spaced apart.

[0008] Furthermore, the placement slot also includes a first slot body and a second slot body connected in sequence, the second slot body being located on the side of the first slot body closer to the connecting component and communicating with the communication port; the width of the first slot body remains unchanged in at least part, and at least one of the width and height of the second slot body gradually increases in the direction away from the first slot body.

[0009] Furthermore, two guide portions are machined on opposite sides of the end of the groove wedge body furthest from the connecting component, and the distance between the two guide portions gradually increases in the direction closer to the connecting component.

[0010] Furthermore, the connecting component is an arc-shaped plate, which has a first inner wall surface for contacting the stator core, and the arc-shaped plate protrudes in a direction away from the stator core.

[0011] Furthermore, the snap-fit ​​part also includes two snap-fit ​​members, which are spaced apart and arranged opposite each other to form a snap-fit ​​groove. The snap-fit ​​groove includes a first snap-fit ​​groove and a snap-fit ​​opening that are connected to each other. The snap-fit ​​opening is located on the side of the first snap-fit ​​groove away from the connecting member for inserting the power cord.

[0012] Furthermore, there are multiple snap-fit ​​parts, which are spaced apart along the extension direction of the connecting component.

[0013] Furthermore, each snap-fit ​​component also includes: a snap-fit ​​plate body, which is disposed on the connecting component; a snap fastener, which is disposed on the side of the snap-fit ​​plate body away from the connecting component and connected to the snap-fit ​​plate body; a first snap-fit ​​groove is formed between the snap-fit ​​plates of the two snap-fit ​​components, and a snap-fit ​​opening is formed between the snap fasteners of the two snap-fit ​​components; the distance between the snap fasteners of the two snap-fit ​​components gradually increases along the direction away from the connecting component.

[0014] According to another aspect of the present invention, an electric motor is provided, having a stator, the stator including a stator core and a stator inner wall surface, the inner side of the stator core being provided with a plurality of slots spaced circumferentially along the stator inner wall surface, each slot being provided with a stator winding, the stator winding being connected to the outside via a power line; the stator also includes at least one slot wedge structure, the slot wedge structure being the aforementioned slot wedge structure, the slot wedge body of the slot wedge structure being inserted into a slot corresponding to the power line.

[0015] By applying the technical solution of this utility model, this application provides a communication port between the slot wedge body and the connecting component, allowing the power cord to be directly inserted from the placement slot into the slot of the snap-fit ​​part. This avoids the cumbersome steps of fixing the power cord to the outside of the stator core required in traditional assembly, thereby greatly improving the efficiency of motor assembly. The snap-fit ​​part design ensures that the power cord is stably and reliably fixed to the stator core during motor operation, reducing the possibility of the power cord loosening or falling off due to vibration or external factors, enhancing the overall performance and reliability of the motor. Furthermore, integrating the power cord snap-fit ​​into the slot wedge structure helps optimize the internal space layout of the motor, making the motor structure more compact and reducing the size and weight of the motor. This effectively solves the problem in the prior art where the high injection pressure during injection molding of the motor easily leads to winding breakage. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 A schematic diagram of an embodiment of the slot wedge structure according to the present invention is shown; Figure 2 The front view of the slot wedge structure is shown; Figure 3 A cross-sectional view of the slot wedge structure is shown; Figure 4 A schematic diagram of the slot wedge structure installed on the stator core is shown; Figure 5 It shows Figure 4 The enlarged view of point B shown; Figure 6 A cross-sectional view of the slot wedge structure mounted on the stator core is shown; Figure 7 It shows Figure 6 A magnified view of a portion at point A shown.

[0017] The above figures include the following reference numerals: 10. Slot wedge body; 110. Placement slot; 120. Connecting port; 111. First tank; 112. Second tank; 20. Connecting component; 210. Snap-fit ​​part; 211. Snap-fit ​​groove; 220. Arc-shaped plate; 230. First inner wall surface; 212. Snap-fit ​​component; 2121. First snap-fit ​​slot; 2122. Snap-fit ​​opening; 2123. Snap-fit ​​plate; 2124. Snap-fit ​​buckle; 100. Stator core; 200. Tooth slot; 300. Stator winding; 400. Power supply wire; 40. Ventilation grille; 50. Guide section; 500. Inner wall surface of stator; 410. Ventilation holes. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 7As shown, the slot wedge structure of this application includes: a slot wedge body 10, which is used to be inserted into the toothed groove 200 on the inner side of the stator core 100, and the slot wedge body 10 is provided with a placement groove 110 for placing at least a portion of the stator winding 300; a connecting member 20, which is connected to the slot wedge body 10, and the connecting member 20 is provided with a snap-fit ​​part 210 for snapping the power line 400 connected to the stator winding 300, the snap-fit ​​part 210 including a snap-fit ​​groove 211 for snapping the power line 400, and a connecting opening 120 on the side of the slot wedge body 10 near the connecting member 20 for respectively connecting the placement groove 110 and the snap-fit ​​groove 211, so as to allow the power line 400 to pass through.

[0020] In this way, by providing a communication port 120 between the slot wedge body 10 and the connecting component 20, the power cord 400 can be directly inserted from the placement slot 110 into the slot 211 of the snap-fit ​​part 210, avoiding the cumbersome steps of fixing the power cord to the outside of the stator core required in traditional assembly, thereby greatly improving the efficiency of motor assembly. The design of the snap-fit ​​part 210 can ensure that the power cord 400 is stably and reliably fixed to the stator core 100 during motor operation, reducing the possibility of the power cord loosening or falling off due to vibration or external factors, enhancing the overall performance and reliability of the motor. Furthermore, integrating the snap-fit ​​of the power cord 400 into the slot wedge structure helps to optimize the internal space layout of the motor, making the motor structure more compact, and helping to reduce the size and weight of the motor. This effectively solves the problem in the prior art where the injection pressure during injection molding is too high, which can easily lead to winding breakage.

[0021] like Figure 1 and Figure 3 As shown, at least one side of the groove wedge body 10 is provided with a ventilation grille 40, which is connected to the placement groove 110.

[0022] The ventilation grille 40 on the side of the slot wedge body 10 not only promotes air circulation within the tooth groove 200, but also acts as a buffer during the molding process of the motor, reducing the impact of the molding compound on the stator winding 300 joints and power lines 400, effectively preventing damage to the windings or power lines caused by high-pressure injection molding, and reducing the production scrap rate. Furthermore, the ventilation grille 40 is connected to the placement groove 110, which can optimize the molding compound filling process, ensure uniform distribution of the molding compound, and enhance the insulation performance of the motor, especially at the winding joints and power line connections, thereby improving the safety and reliability of motor operation.

[0023] Preferably, ventilation grilles 40 are provided on both sides of the groove wedge body 10 in the width direction; and / or, the ventilation grilles 40 include a plurality of ventilation holes 410 spaced apart.

[0024] Ventilation grilles 40 on both sides of the slot wedge body 10 enable bidirectional heat dissipation, enhancing the cooling effect. Compared to single-sided grilles, bidirectional ventilation grilles distribute cooling air more evenly, improving the overall heat dissipation efficiency of the stator winding 300 and helping to maintain the motor's operating temperature under high loads. Multiple spaced ventilation holes 410 optimize airflow paths, reduce airflow resistance, increase airflow volume and velocity, ensuring that cooling air effectively carries away heat as it passes through the stator winding 300. Furthermore, the spacing of the ventilation holes prevents impurities or foreign objects from clogging individual ventilation holes and affecting heat dissipation.

[0025] like Figure 3 As shown, the placement slot 110 also includes a first slot 111 and a second slot 112 connected in sequence. The second slot 112 is located on the side of the first slot 111 near the connecting member 20 and is connected to the communication port 120. The width of the first slot 111 remains unchanged in at least part, and at least one of the width and height of the second slot 112 gradually increases in the direction away from the first slot 111.

[0026] The combined design of the first slot 111 and the second slot 112 can better adapt to the shape and size of the stator winding 300, allowing the winding to be placed more tightly and stably within the slot wedge body 10, reducing vibration and noise during motor operation, while improving the electrical performance and mechanical strength of the winding. The varying width and height of the second slot 112 can guide cooling air to flow more effectively through the winding, increasing the heat dissipation area and efficiency. Especially in the area near the connecting component 20, due to the additional heat from the power line 400, this design can significantly enhance heat dissipation in this area, preventing localized overheating.

[0027] like Figure 1 As shown, two guide portions 50 are respectively processed on opposite sides of the end of the groove wedge body 10 away from the connecting member 20, and the distance between the two guide portions 50 gradually increases along the direction close to the connecting member 20.

[0028] The guide portion 50 can guide the slot wedge body 10 to be inserted more accurately into the tooth groove 200 of the stator core 100. Especially in the process of automated assembly, this guiding effect can significantly improve the assembly accuracy and efficiency, and reduce mechanical damage or electrical performance problems caused by improper assembly. As the distance between the guide portions 50 gradually increases along the insertion direction, the slot wedge body 10 will gradually "lock" in the correct position during the insertion of the tooth groove 200, preventing displacement in subsequent operations or motor operation, thereby enhancing the positioning stability and mechanical strength of the slot wedge structure.

[0029] Specifically, the connecting component 20 is an arc-shaped plate 220, which has a first inner wall surface 230 for contacting the stator core 100, and the arc-shaped plate 220 is convex in a direction away from the stator core 100.

[0030] The raised design of the arc-shaped plate 220 can better fit the curved shape of the stator core 100, increasing the contact area between the slot wedge structure and the stator core, thereby improving mechanical stability and reducing vibration and noise during motor operation. The first inner wall surface 230 of the arc-shaped plate 220 is in close contact with the stator core 100, which can improve the thermal contact performance between the stator core and the cooling medium, help accelerate the conduction and dissipation of heat, thereby improving the heat dissipation effect of the motor and extending the motor life.

[0031] like Figure 1 As shown, the snap-fit ​​part 210 also includes two snap-fit ​​members 212, which are spaced apart and arranged opposite to each other to form a snap-fit ​​groove 211. The snap-fit ​​groove 211 includes a first snap-fit ​​groove 2121 and a snap-fit ​​opening 2122 that are connected to each other. The snap-fit ​​opening 2122 is located on the side of the first snap-fit ​​groove 2121 away from the connecting member 20, for inserting the power cord 400.

[0032] The first slot 2121 formed by the two snap-fit ​​pieces 212 can more firmly hold the power cord 400, preventing the power cord from loosening or falling off due to vibration during motor operation, thereby improving the reliability of the motor. The design of the snap-fit ​​opening 2122 allows the power cord 400 to be snapped in from the side of the slot away from the connecting part 20, without having to be inserted from the side or bottom, simplifying the assembly process of the power cord and improving assembly efficiency.

[0033] The design of the two snap-fit ​​connectors 212 in this application allows the power cord 400 to be reasonably arranged within the snap-fit ​​portion 210, avoiding tangling or compression between the power cords, which helps to improve the insulation performance of the power cords and reduce electromagnetic interference.

[0034] Preferably, the number of snap-fit ​​parts 210 in this application can be multiple. Multiple snap-fit ​​parts 210 are spaced apart along the extension direction of the connecting component 20. Multiple snap-fit ​​parts 210 can be distributed and fixed along the length direction of the power line 400 to ensure the stability of the power line during motor operation, prevent vibration, displacement or damage of the power line due to poor local fixation, improve the safety and reliability of motor operation, and the spaced arrangement of multiple snap-fit ​​parts 210 can ensure that the electrical connection of the power line 400 is consistent throughout the entire winding length, reduce the fluctuation of electrical performance caused by poor contact or resistance changes, and improve the electrical performance stability of the motor.

[0035] like Figure 2As shown, each snap-fit ​​component 212 further includes: a snap-fit ​​plate 2123, which is disposed on the connecting component 20; and a snap fastener 2124, which is disposed on the side of the snap-fit ​​plate 2123 away from the connecting component 20 and connected to the snap-fit ​​plate 2123; a first snap groove 2121 is formed between the snap-fit ​​plates 2123 of the two snap-fit ​​components 212, and a snap-fit ​​opening 2122 is formed between the snap fasteners 2124 of the two snap-fit ​​components 212; the distance between the snap fasteners 2124 of the two snap-fit ​​components 212 gradually increases along the direction away from the connecting component 20.

[0036] The design of gradually increasing distance between the clips 2124 allows the snap-fit ​​part 212 to accommodate power cords 400 of different diameters, improving the flexibility of power cord fixing and ensuring that the power cord is securely snapped in, reducing vibration and displacement during operation. The snap-fit ​​plate 2123 provides a guide for the power cord 400, making the power cord easier to insert into the snap-fit ​​part 210, reducing the difficulty of operation and potential damage risk during assembly. The combined design of the snap-fit ​​plate 2123 and the clips 2124 in this application increases the mechanical strength of the snap-fit ​​part 210, which helps the power cord to be stable under mechanical stress and extends the service life of the snap-fit ​​part 210 and the power cord.

[0037] like Figures 4 to 6 As shown, the motor of this application has a stator, which includes a stator core 100 and a stator inner wall surface 500. The inner side of the stator core 100 is provided with a plurality of slots 200 spaced circumferentially along the stator inner wall surface 500. Each slot 200 is provided with a stator winding 300, and the stator winding 300 is connected to the outside through a power line 400. The stator also includes at least one slot wedge structure, which is the slot wedge structure described above. The slot wedge body 10 of the slot wedge structure is inserted into the slot 200 corresponding to the power line 400.

[0038] By setting a slot wedge body 10 in each slot 200, the stator winding 300 can be effectively fixed, ensuring that the winding will not be displaced or vibrate when the motor rotates at high speed, thus improving the stability and reliability of motor operation. The special design of the slot wedge structure provides a solution for fixing and arranging the power lines 400, ensuring that the power lines are connected in an orderly and stable manner inside the motor, reducing motor failures caused by problems such as power line displacement, poor contact, or breakage, and improving electrical performance.

[0039] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: The slot wedge structure of this application includes: a slot wedge body 10, which is inserted into a toothed groove 200 on the inner side of the stator core 100, and has a placement groove 110 for placing a stator winding 300; a connecting member 20, which is connected to the slot wedge body 10, and has a snap-fit ​​part 210 for snapping a power line 400 connected to the stator winding 300 on the stator core 100, the snap-fit ​​part 210 including a snap-fit ​​groove 211 for snapping the power line 400, and a connecting opening 120 on the side of the slot wedge body 10 near the connecting member 20 for passing through the power line 400.

[0040] As can be seen, by providing a communication port 120 between the slot wedge body 10 and the connecting component 20, the power cord 400 can be directly inserted from the placement slot 110 into the slot 211 of the snap-fit ​​part 210, avoiding the cumbersome steps of fixing the power cord to the outside of the stator core required in traditional assembly, thereby greatly improving the efficiency of motor assembly. The design of the snap-fit ​​part 210 ensures that the power cord 400 is stably and reliably fixed to the stator core 100 during motor operation, reducing the possibility of the power cord loosening or falling off due to vibration or external factors, enhancing the overall performance and reliability of the motor. Furthermore, integrating the snap-fit ​​of the power cord 400 into the slot wedge structure helps optimize the internal space layout of the motor, making the motor structure more compact and helping to reduce the size and weight of the motor. This effectively solves the problem in the prior art where the injection pressure during injection molding is too high, which can easily lead to winding breakage.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A slotted wedge structure, characterized in that, include: The slot wedge body (10) is used to be inserted into the toothed groove (200) on the inner side of the stator core (100). The slot wedge body (10) is provided with a placement groove (110) for placing at least part of the stator winding (300). A connecting component (20) is connected to the slot wedge body (10). The connecting component (20) is provided with a snap-fit ​​part (210) for snapping a power line (400) connected to the stator winding (300). The snap-fit ​​part (210) includes a snap-fit ​​groove (211) for snapping the power line (400). The slot wedge body (10) is provided with a connecting port (120) on the side near the connecting component (20) for connecting the placement slot (110) and the snap-fit ​​groove (211) respectively, so that the power line (400) can pass through.

2. The slotted wedge structure according to claim 1, characterized in that, At least one side of the groove wedge body (10) is provided with a ventilation grille (40), which is connected to the placement groove (110).

3. The slot wedge structure according to claim 2, characterized in that, The ventilation grilles (40) are provided on both sides of the wedge body (10) in the width direction; and / or, The ventilation grille (40) includes a plurality of ventilation holes (410) spaced apart.

4. The slotted wedge structure according to claim 1, characterized in that, The placement slot (110) further includes a first slot (111) and a second slot (112) connected in sequence. The second slot (112) is located on the side of the first slot (111) closer to the connecting member (20) and communicates with the communication port (120). The width of the first slot (111) remains unchanged in at least part, and at least one of the width and height of the second slot (112) gradually increases in a direction away from the first slot (111).

5. The slot wedge structure according to claim 1, characterized in that, Two guide portions (50) are respectively machined on opposite sides of the end of the groove wedge body (10) away from the connecting member (20), and the distance between the two guide portions (50) gradually increases in the direction close to the connecting member (20).

6. The slotted wedge structure according to claim 1, characterized in that, The connecting component (20) is an arc-shaped plate (220), and the arc-shaped plate (220) is provided with a first inner wall surface (230) for contacting the stator core (100). The arc-shaped plate (220) is convex in a direction away from the stator core (100).

7. The slot wedge structure according to claim 1, characterized in that, The snap-fit ​​portion (210) further includes: Two snap-fit ​​pieces (212) are spaced apart and arranged opposite each other to form the slot (211). The slot (211) includes a first slot (2121) and a snap-fit ​​opening (2122) that are connected to each other. The snap-fit ​​opening (2122) is located on the side of the first slot (2121) away from the connecting member (20) for the power cord (400) to be snapped into.

8. The slotted wedge structure according to claim 1, characterized in that, The number of the snap-fit ​​parts (210) is multiple, and the multiple snap-fit ​​parts (210) are spaced apart along the extension direction of the connecting member (20).

9. The slot wedge structure according to claim 7, characterized in that, Each of the aforementioned snap-fit ​​connectors (212) further includes: A snap-fit ​​plate (2123) is disposed on the connecting component (20); A snap fastener (2124) is disposed on the side of the snap-fit ​​plate (2123) away from the connecting member (20) and is connected to the snap-fit ​​plate (2123); The first slot (2121) is formed between the snap-fit ​​plates (2123) of the two snap-fit ​​members (212), and the snap-fit ​​opening (2122) is formed between the buckles (2124) of the two snap-fit ​​members (212). Along the direction away from the connecting member (20), the distance between the latches (2124) of the two snap fasteners (212) gradually increases.

10. An electric motor, characterized in that, The stator includes a stator core (100) and a stator inner wall (500). The inner side of the stator core (100) is provided with a plurality of slots (200) spaced circumferentially along the stator inner wall (500). Each slot (200) is provided with a stator winding (300), and the stator winding (300) is connected to the outside through a power line (400). The stator also includes at least one slot wedge structure, which is the slot wedge structure according to any one of claims 1 to 9. The slot wedge body (10) of the slot wedge structure is inserted into the slot (200) corresponding to the power line (400).

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