Plug-in type insulating framework for motor stator core

Abstract

The utility model discloses a plug-in type insulating framework for a motor stator core, which comprises two insulating frameworks with the same specification, and the two insulating frameworks are plugged in each other to form an I-shaped clamping groove with a hollow groove bottom. According to the plug-in type insulation framework for the motor stator core, a part of material contacted with the groove bottom of the stator core is removed from the insulation framework, and thinner insulation paper is used for replacing the insulation framework, so that the material is saved, the stator winding groove fullness rate is improved, the heat dissipation capability of a motor is improved, the temperature rise performance of the motor is better, and the service life of the motor is prolonged. End plate grooves formed in the end plate supporting plates can enable winding wires to be arranged in order, winding columns are arranged on the upper edge plates of the end plates so that the winding starting point can be fixed, pin holes are formed in the winding columns, pins can be inserted into the pin holes, the pins can be welded to a circuit board, and therefore wiring is convenient, motor assembly is simplified, and the motor efficiency is improved. And the lengths of the skeleton upper edge plate and the skeleton lower edge plate are less than half of the length of the stator core, so that the skeleton material can be reduced, and the heat dissipation can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a plug-in type insulating skeleton for a motor stator core. Background Art

[0002] Motor slot fill factor is a key performance metric in motor design and manufacturing. It reflects the ratio of the area occupied by the motor windings to the total area within the slots. A higher slot fill factor has a significant positive impact on motor performance. Under specific design conditions, when the motor's slot fill factor reaches its maximum winding capacity, the motor's physical length can be effectively shortened, thereby minimizing its size. Improving the motor's slot fill factor not only promotes motor miniaturization but also reduces material usage, thereby lowering production costs. This is a direct and effective optimization approach.

[0003] In existing motor technology, the slot fill rate of winding is restricted by the thickness of the insulation frame. With the increasing demand for motor miniaturization, the power density of motors continues to improve, which requires the motor slot fill rate to be increased accordingly. A common method is to increase the space in the slot by reducing the thickness of the insulation frame, thereby improving the slot fill rate. However, for the traditional front and rear plug-in stator core insulation frame, due to the limitations of materials and injection molding process, its thickness is close to the manufacturability limit. Further reducing the thickness not only makes molding difficult, but the thickening of the insulation frame will also reduce the heat dissipation efficiency of the motor, which in turn has an adverse effect on the temperature rise performance of the motor.

[0004] Although advanced processing technology can achieve thinning of the one-piece injection-molded skeleton, this method has some significant challenges. First, the production cost is relatively high. Second, the complexity of the manufacturing process increases the difficulty of production, which in turn affects the production efficiency of the motor. In addition, the instability of product quality also leads to high scrap costs. On the other hand, the motor winding slot fill rate is also limited by the shape of the stator core. To improve production efficiency, motor manufacturers usually use a block-type T-shaped punched stator core to manufacture prototypes, but this method will further reduce the slot fill rate of the motor, thereby affecting the overall performance and efficiency of the motor. Utility Model Content

[0005] The purpose of the present utility model is to provide a plug-in insulating frame for a motor stator core, so as to solve the problem proposed in the above background technology that when processing a traditional insulating frame to adapt to the full slot rate of the stator winding, it is impossible to improve the production efficiency and the yield rate is low.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a plug-in insulating frame for a motor stator core, comprising two insulating frames of the same specifications, the two insulating frames being plugged into each other to form a hollow I-shaped clamp slot at the bottom of the slot, a fixed stator core being provided at the upper ends of the two insulating frames, and two sheets of positioning insulating paper being bonded between the fixed stator core and the two insulating frames.

[0007] Preferably, the insulating frame includes a frame upper edge plate and a frame lower edge plate, and a frame end plate is provided on one side of the frame upper edge plate and the frame lower edge plate.

[0008] By adopting the above technical solution, the upper edge plate of the insulating frame is attached to the upper edge surface of the insulating paper to position and fix it, and the upper edge plate of the insulating frame has an adaptability.

[0009] Preferably, the length of the upper edge plate and the lower edge plate of the skeleton is less than half the length of the fixed stator core.

[0010] With the above technical solution, since the length of the upper and lower plates of the skeleton is less than half the length of the fixed stator core, the upper, curved and lower surfaces of the insulating paper are not completely covered by the insulating skeleton.

[0011] Preferably, the skeleton end plate includes an end plate support plate, and the upper and lower ends of the end plate support plate are respectively connected to the end plate upper edge plate and the end plate lower edge plate.

[0012] By adopting the above technical solution, the upper and lower ends of the end plate support plate are respectively connected with the end plate upper plate and the end plate lower plate, which facilitates supporting connection through the end plate support plate.

[0013] Preferably, one end of the upper edge plate of the skeleton is connected to the upper edge plate of the end plate, and one end of the lower edge plate of the skeleton is connected to the lower edge plate of the end plate.

[0014] By adopting the above technical solution, the upper edge plate of the end plate is fixed by the upper edge plate of the frame, while the lower edge plate of the end plate is fixed by the lower edge plate of the frame.

[0015] Preferably, the bottom surface of the upper plate of the skeleton and the bottom surface of the upper plate of the end plate are located in the same horizontal plane, the top surface of the upper plate of the end plate is higher than the top surface of the upper plate of the skeleton, the top surface of the lower plate of the skeleton and the top surface of the lower plate of the end plate are located in the same horizontal plane, and the bottom surface of the lower plate of the end plate is higher than the bottom surface of the lower plate of the skeleton.

[0016] By adopting the above technical solution, the lower edge plate of the insulating frame is attached to the lower edge surface of the insulating paper to position and fix it.

[0017] Preferably, the end plate support plate is provided with a plurality of chamfered grooves parallel to each other, and adjacent chamfered grooves form end plate grooves, the cross-section of the chamfered groove is an isosceles triangle, and the bottom of the chamfered groove is a rounded design.

[0018] By adopting the above technical solution, the end plate groove can provide a positioning function for the stator winding, making it convenient for the stator winding to be wound around the insulating frame in an orderly manner, and the rounded corner treatment is beneficial to protecting the winding.

[0019] Preferably, a winding post is fixedly connected to the surface of the upper edge plate of the end plate, and the winding post is perpendicular to the end plate support plate.

[0020] By adopting the above technical solution, the pin hole provided in the winding column can be used for inserting the pin.

[0021] Preferably, the positioning insulating paper includes an insulating paper upper surface, an insulating paper radian surface, an insulating paper bottom surface and an insulating paper lower surface, and two symmetrical insulating paper sealing surfaces are provided on both sides of the insulating paper bottom surface. The fixed stator core includes a stator core upper surface, a stator core radian surface, a stator core bottom surface, a stator core lower surface and a stator core side surface, and a stator winding is provided below the fixed stator core.

[0022] By adopting the above technical solution, the insulating paper upper edge surface, the insulating paper radian surface, the insulating paper bottom surface and the insulating paper lower edge surface on the surface are set by positioning the insulating paper.

[0023] Preferably, the upper edge surface of the insulating paper is attached to the upper edge surface of the stator core, the curved surface of the insulating paper is attached to the curved surface of the stator core, the bottom surface of the insulating paper is attached to the bottom surface of the stator core, the lower edge surface of the insulating paper, and the two insulating paper sealing surfaces are respectively attached to the surfaces of the side surfaces of the stator core on both sides of the fixed stator core, and the surface of the winding column is provided with a pin hole.

[0024] By adopting the above technical solution, the insulating frame is positioned and fixed by attaching the frame end plates of the insulating frame to the sealing surface of the insulating paper.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the plug-in insulating skeleton for the motor stator core:

[0026] 1. The insulation skeleton removes the part of the material that contacts the bottom of the stator core slot and replaces it with thinner insulation paper. This saves material while increasing the stator winding slot fill rate, and is beneficial to improving the heat dissipation capacity of the motor, making the motor's temperature rise performance better;

[0027] 2. The end plate grooves set on the end plate support plate can arrange the winding neatly. The winding posts set on the end plate can not only fix the winding starting point, but also make the stator winding more compact, further improving the slot fill rate;

[0028] 3. The length of the upper and lower plates of the skeleton is less than half the length of the stator core, which can reduce the skeleton material and enhance heat dissipation. The bottom surface of the stator core is only covered with insulating paper, not with skeleton, thereby increasing the space in the slot and improving the slot fill rate.

[0029] 4. The pin holes in the winding column can be used for pin insertion, and the pins can be welded to the circuit board, which makes it easier for personnel to carry out wiring, simplifies the assembly of the motor, and is conducive to improving the overall efficiency of motor processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the insulation frame and insulation paper connected in the utility model.

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the connection between the lower edge plate of the skeleton and the hollow I-shaped clamp groove at the bottom of the groove of the utility model.

[0032] Figure 3 It is a schematic diagram of the three-dimensional structure of the connection between the lower edge plate of the end plate and the end plate support plate of the utility model.

[0033] Figure 4 It is a schematic diagram of the three-dimensional structure of the connection between the insulating paper sealing surface and the upper edge surface of the stator core of the utility model.

[0034] Figure 5 This is a schematic diagram of the three-dimensional structure of the connection between the positioning insulating paper and the insulating frame of the utility model.

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the connection between the positioning insulating paper and the fixed stator core of the utility model.

[0036] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection between the fixed stator core and the stator winding of the utility model.

[0037] Figure 8 This is a front view schematic diagram of the insulating skeleton of the present invention.

[0038] In the figure: 1. Insulation frame; 2. Positioning insulation paper; 3. Upper edge plate of frame; 4. Lower edge plate of frame; 5. End plate of frame; 6. Hollow I-shaped clamp groove at the bottom of the slot; 7. Upper edge plate of end plate; 8. Lower edge plate of end plate; 9. Support plate of end plate; 10. Upper edge surface of insulation paper; 11. Curved surface of insulation paper; 12. Bottom surface of insulation paper; 13. Lower edge surface of insulation paper; 14. Pin hole; 15. Sealing surface of insulation paper; 16. Upper edge surface of stator core; 17. Curved surface of stator core; 18. Bottom surface of stator core; 19. Lower edge surface of stator core; 20. Side surface of stator core; 21. Fixed stator core; 22. Stator winding; 23. Chamfered groove; 24. End plate groove; 25. Winding column. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] See also Figure 1-8 The utility model provides a technical solution: a plug-in insulating frame for a motor stator core, comprising two insulating frames 1 of the same specifications, the two insulating frames 1 being plugged into each other to form a hollow I-shaped clamp slot 6 at the bottom of the slot, a fixed stator core 21 being provided at the upper ends of the two insulating frames 1, and two positioning insulating papers 2 being attached between the fixed stator core 21 and the two insulating frames 1;

[0041] The insulating frame 1 includes a frame upper edge plate 3 and a frame lower edge plate 4. A frame end plate 5 is provided on one side of the frame upper edge plate 3 and the frame lower edge plate 4.

[0042] The length of the upper edge plate 3 and the lower edge plate 4 of the skeleton is less than half the length of the fixed stator core 21;

[0043] The skeleton end plate 5 includes an end plate support plate 9, and the upper and lower ends of the end plate support plate 9 are respectively connected to the end plate upper plate 7 and the end plate lower plate 8;

[0044] One end of the upper edge plate 3 of the skeleton is connected to the upper edge plate 7 of the end plate;

[0045] One end of the frame bottom plate 4 is connected to the end plate bottom plate 8 .

[0046] The end plate support plate 9 is provided with a plurality of chamfered grooves 23 parallel to each other, and end plate grooves 24 are formed between adjacent chamfered grooves 23 .

[0047] The cross section of the chamfered groove 23 is an isosceles triangle, and the bottom of the chamfered groove 23 is rounded.

[0048] The bottom surface of the upper edge plate 3 of the frame and the bottom surface of the upper edge plate 7 of the end plate are located at the same horizontal plane;

[0049] The top surface of the upper edge plate 7 of the end plate is higher than the top surface of the upper edge plate 3 of the frame;

[0050] The top surface of the frame lower edge plate 4 and the top surface of the end plate lower edge plate 8 are located at the same horizontal plane;

[0051] The bottom surface of the end plate lower edge plate 8 is higher than the bottom surface of the frame lower edge plate 4 .

[0052] A winding post 25 is fixedly connected to the surface of the upper plate 7 of the end plate, and the winding post 25 is perpendicular to the end plate support plate 9.

[0053] The positioning insulating paper 2 includes an insulating paper upper edge surface 10 , an insulating paper radian surface 11 , an insulating paper bottom surface 12 , and an insulating paper lower edge surface 13 . Two symmetrical insulating paper sealing surfaces 15 are provided on both sides of the insulating paper bottom surface 12 .

[0054] The fixed stator core 21 includes a stator core upper surface 16, a stator core camber surface 17, a stator core bottom surface 18, a stator core lower surface 19, and a stator core side surface 20;

[0055] The upper edge surface 10 of the insulating paper is attached to the upper edge surface 16 of the stator core, the curved surface 11 of the insulating paper is attached to the curved surface 17 of the stator core, the bottom surface 12 of the insulating paper is attached to the bottom surface 18 of the stator core, and the lower edge surface 13 of the insulating paper is attached to the lower edge surface 19 of the stator core. The two insulating paper sealing surfaces 15 are respectively attached to the side surfaces 20 of the stator core on both sides of the fixed stator core 21. A stator winding 22 is arranged below the fixed stator core 21.

[0056] The upper edge plate 3 of the insulating frame 1 is attached to the upper edge surface 10 of the insulating paper to position and fix it. The upper edge plate 3 of the insulating frame 1 has a curvature that matches the curvature surface 17 of the stator core and the curvature surface 11 of the insulating paper, and can position and fix the curvature surface 11 of the insulating paper. The lower edge plate 4 of the insulating frame 1 is attached to the lower edge surface 13 of the insulating paper to position and fix it. The end plate 5 of the insulating frame 1 is attached to the sealing surface 15 of the insulating paper to position and fix it.

[0057] The bottom surface 12 of the insulating paper is not fixed with a skeleton material to increase the winding space and improve the slot fill rate. The bottom surface 12 of the insulating paper and the insulating paper sealing surface 15 can ensure that there is no gap between the bottom surface 18 of the stator core and the side surface 20 of the stator core, thereby preventing the fixed stator core 21 from being punctured due to the gap between the bottom surface 12 of the insulating paper and the end plate support plate 9.

[0058] In addition, since the length of the upper edge plate 3 and the lower edge plate 4 of the skeleton is less than half the length of the fixed stator core 21, the upper edge surface 10 of the insulating paper, the curved surface 11 of the insulating paper and the lower edge surface 13 of the insulating paper are not completely covered by the insulating skeleton 1, which is beneficial to increasing the space in the slot, improving the slot fill rate, and also beneficial to heat dissipation.

[0059] The specific implementation methods are as follows:

[0060] Two pieces of positioning insulating paper 2 are respectively adhered to the fixed stator core 21, wherein the upper edge surface 10 of the insulating paper is adhered to the upper edge surface 16 of the stator core, the curved surface 11 of the insulating paper is adhered to the curved surface 17 of the stator core, the bottom surface 12 of the insulating paper is adhered to the bottom surface 18 of the stator core, and the lower edge surface 13 of the insulating paper is adhered to the lower edge surface 19 of the stator core. A pair of insulating paper sealing surfaces 15 are respectively adhered to the side surfaces 20 of the stator core on both sides of the fixed stator core 21.

[0061] Then, hold the positioning insulating paper 2 and the fixed stator core 21 with one hand, and take out the insulating frame 1 with the other hand and insert it into the fixed stator core 21 protected by the positioning insulating paper 2, wherein the upper edge plate 3 of the insulating frame 1 is attached to the upper edge surface 10 of the insulating paper to position and fix it, and the upper edge plate 3 of the insulating frame 1 has a curvature that matches the curvature surface 17 of the stator core and the curvature surface 11 of the insulating paper, and can position and fix the curvature surface 11 of the insulating paper, the lower edge plate 4 of the insulating frame 1 is attached to the lower edge surface 13 of the insulating paper to position and fix it, and the frame end plate 5 of the insulating frame 1 is attached to the sealing surface 15 of the insulating paper to position and fix it.

[0062] It should be noted that in the above positioning and fixing process, the bottom surface 18 of the stator core is only covered by the positioning insulating paper 2, and is not covered by the insulating frame 1. This is beneficial to increase the winding space and improve the slot fill rate, and is also beneficial to heat dissipation. The insulating paper bottom surface 12 and the insulating paper sealing surface 15 can ensure that there is no gap between the bottom surface 18 of the stator core and the side surface 20 of the stator core, avoiding the fixed stator core 21 being punctured due to the gap between the bottom surface 12 of the insulating paper and the end plate support plate 9.

[0063] In addition, since the length of the upper edge plate 3 and the lower edge plate 4 of the skeleton is less than half the length of the fixed stator core 21, the upper edge surface 10 of the insulating paper, the curved surface 11 of the insulating paper and the lower edge surface 13 of the insulating paper are not completely covered by the insulating skeleton 1, which is beneficial to increasing the space in the slot, improving the slot fill rate, and also beneficial to heat dissipation.

[0064] Then take out the second insulating frame 1 and insert it from the other end of the fixed stator core 21 protected by the positioning insulating paper 2, wherein the skeleton upper edge plate 3 of the insulating frame 1 is attached to the upper edge surface 10 of the insulating paper to position and fix it, and the skeleton upper edge plate 3 of the insulating frame 1 has a curvature that adapts to the curvature surface 17 of the stator core and the curvature surface 11 of the insulating paper, and can position and fix the curvature surface 11 of the insulating paper, the skeleton lower edge plate 4 of the insulating frame 1 is attached to the lower edge surface 13 of the insulating paper to position and fix it, and the skeleton end plate 5 of the insulating frame 1 is attached to the sealing surface 15 of the insulating paper to position and fix it.

[0065] Furthermore, when winding, a few turns are first wound around the winding post 25, which can not only fix the winding starting point, but also make the stator winding 22 tighter, further improving the slot fill rate.

[0066] Furthermore, during winding, the end plate groove 24 can provide positioning for the stator winding 22, so that the stator winding 22 can be wound around the device in an orderly manner, and the rounded corners are beneficial to protecting the winding.

[0067] Furthermore, the pin holes 14 provided in the winding post 25 can be used for inserting pins, and the pins can be welded to the circuit board, thereby facilitating wiring and simplifying motor assembly.

[0068] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plug-in insulating frame for a motor stator core, comprising two insulating frames (1) of the same specification, characterized in that: The two insulating frames (1) are inserted into each other to form a hollow I-shaped clamp slot (6) at the bottom of the slot; a fixed stator core (21) is provided at the upper ends of the two insulating frames (1); and two positioning insulating papers (2) are attached between the fixed stator core (21) and the two insulating frames (1).

2. The plug-in insulating frame for a motor stator core according to claim 1, characterized in that: The insulating frame (1) comprises a frame upper edge plate (3) and a frame lower edge plate (4), and a frame end plate (5) is provided on one side of the frame upper edge plate (3) and the frame lower edge plate (4).

3. The plug-in insulating frame for a motor stator core according to claim 2, characterized in that: The lengths of the upper edge plate (3) and the lower edge plate (4) of the skeleton are less than half the length of the fixed stator core (21).

4. The plug-in insulating frame for a motor stator core according to claim 2, characterized in that: The skeleton end plate (5) comprises an end plate support plate (9), and the upper and lower ends of the end plate support plate (9) are respectively connected to the end plate upper edge plate (7) and the end plate lower edge plate (8).

5. The plug-in insulating frame for a motor stator core according to claim 4, characterized in that: One end of the upper edge plate (3) of the skeleton is connected to the upper edge plate (7) of the end plate, and one end of the lower edge plate (4) of the skeleton is connected to the lower edge plate (8) of the end plate.

6. The plug-in insulating frame for a motor stator core according to claim 4, characterized in that: The bottom surface of the upper edge plate (3) of the frame and the bottom surface of the upper edge plate (7) of the end plate are located in the same horizontal plane, the top surface of the upper edge plate (7) of the end plate is higher than the top surface of the upper edge plate (3) of the frame, the top surface of the lower edge plate (4) of the frame and the top surface of the lower edge plate (8) of the end plate are located in the same horizontal plane, and the bottom surface of the lower edge plate (8) of the end plate is higher than the bottom surface of the lower edge plate (4) of the frame.

7. The plug-in insulating frame for a motor stator core according to claim 4, characterized in that: The end plate support plate (9) is provided with a plurality of mutually parallel chamfered grooves (23), and an end plate groove (24) is formed between adjacent chamfered grooves (23). The cross section of the chamfered groove (23) is an isosceles triangle, and the bottom of the chamfered groove (23) is a rounded design.

8. The plug-in insulating frame for a motor stator core according to claim 4, characterized in that: A winding post (25) is fixedly connected to the surface of the upper plate (7) of the end plate. The winding post (25) is perpendicular to the end plate support plate (9). A pin hole (14) is provided on the surface of the winding post (25).

9. The plug-in insulating frame for a motor stator core according to claim 1, characterized in that: The positioning insulating paper (2) comprises an insulating paper upper edge surface (10), an insulating paper radian surface (11), an insulating paper bottom surface (12) and an insulating paper lower edge surface (13); two symmetrical insulating paper sealing surfaces (15) are provided on both sides of the insulating paper bottom surface (12); the fixed stator core (21) comprises a stator core upper edge surface (16), a stator core radian surface (17), a stator core bottom surface (18), a stator core lower edge surface (19) and a stator core side surface (20); and a stator winding (22) is provided below the fixed stator core (21).

10. The plug-in insulating frame for a motor stator core according to claim 9, characterized in that: The upper edge surface (10) of the insulating paper is affixed to the upper edge surface (16) of the stator core, the radian surface (11) of the insulating paper is affixed to the radian surface (17) of the stator core, the bottom surface (12) of the insulating paper is affixed to the bottom surface (18) of the stator core, the lower edge surface (13) of the insulating paper is affixed to the lower edge surface (19) of the stator core, and the two insulating paper sealing surfaces (15) are respectively affixed to the surfaces of the side surfaces (20) of the stator core on both sides of the fixed stator core (21).

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