Insulation framework and motor stator core assembling structure

Abstract

The utility model provides an assembly structure of an insulating framework and a motor stator iron core. The assembly structure comprises the insulating framework and a plurality of stator iron core punching sheets which are arranged in the insulating framework in a laminated manner, the insulating framework is provided with a framework groove bottom surface, a framework connecting inclined surface and M transition connecting surfaces II which are arranged in sequence, and the framework groove bottom surface and the framework connecting inclined surface are arranged in an intersecting manner; the transition connecting surface II at the head end and the framework tooth part of the insulating framework, two adjacent transition connecting surfaces II, and the transition connecting surface II at the tail end and the framework connecting inclined surface are connected through arc concave surfaces; the stator iron core punching sheet is provided with an iron core groove bottom surface, an iron core connection inclined surface and M transition connection surfaces 1 which are arranged in sequence. The bottom face of the iron core groove corresponds to the bottom face of the framework groove, the iron core connecting inclined face corresponds to the framework connecting inclined face, and the first transition connecting face corresponds to the second transition connecting face. According to the utility model, the effects of increasing the contact area between the winding coil and the insulating framework and increasing the slot fullness rate can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor design technical field, concretely relates to an insulating framework and motor stator core assembly structure. BACKGROUND

[0002] In order to make full use of electric energy, the market including each host factory gradually replaces traditional mechanical pump with electronic oil pump for cooling, lubrication and the like of main drive motor, engine, gearbox and the like. Therefore, only the electronic oil pump with excellent performances such as high efficiency, high power density, high torque density and light weight can meet the market demand.

[0003] The Chinese patent application with the publication number CN117424378A discloses a simple assembly type split core insulating framework structure and an assembly method thereof, which relates to a split insulating framework and an assembly method thereof on a stator core. The insulating framework can reduce the die opening cost of the insulating framework of the stator core at different axial lengths. However, the patent application still adopts the traditional flat-bottom slot core structure and insulating framework, and the slot fill rate still needs to be improved.

[0004] In summary, there is an urgent need for an insulating framework and motor stator core assembly structure to solve the problem of the existing flat-bottom slot stator core structure for electronic oil pumps and its assembled insulating framework occupying slot space and reducing the slot fill rate. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an insulating framework and motor stator core assembly structure, which aims to solve the problem of the existing flat-bottom slot stator core structure for electronic oil pumps and its assembled insulating framework occupying slot space and reducing the slot fill rate. The specific technical scheme is as follows:

[0006] An insulating framework and motor stator core assembly structure, comprising an insulating framework and a plurality of stator core punching sheets stacked in the insulating framework;

[0007] The insulating framework is provided with a framework slot bottom surface, a framework connecting inclined surface and M transition connecting surfaces two arranged in sequence. The framework slot bottom surface and the framework connecting inclined surface are arranged at an intersection. The transition connecting surface two at the first end and the framework tooth portion of the insulating framework, the transition connecting surface two at the first end and the transition connecting surface two at the second end, and the transition connecting surface two at the second end and the framework connecting inclined surface are all connected through a circular arc concave surface.

[0008] The stator core punching sheet is provided with a core slot bottom surface, a core connecting inclined surface and M transition connecting surfaces arranged in sequence; wherein, the core slot bottom surface is arranged in correspondence with the skeleton slot bottom surface, the core connecting inclined surface is arranged in correspondence with the skeleton connecting inclined surface, the transition connecting surfaces are arranged in one-to-one correspondence with the transition connecting surfaces two, and the first end transition connecting surface is connected with the core tooth portion on the stator core punching sheet, and the tail end transition connecting surface is connected with the core connecting inclined surface; wherein, M is a natural number greater than or equal to 1.

[0009] Preferably, the winding coil formed by the enameled wire is arranged on the skeleton tooth portion of the insulation skeleton, and the winding coil comprises a plurality of enameled wire layers arranged from inside to outside, wherein, the innermost enameled wire layer is arranged tangentially with the skeleton tooth portion, and the outermost enameled wire layer is arranged at the position where the skeleton slot bottom surface and the skeleton connecting inclined surface intersect.

[0010] Preferably, the distance between the centers of the two adjacent circular arc concave surfaces is equal to the outer diameter of the enameled wire.

[0011] Preferably, the radius of the circular arc concave surface is equal to the outer radius of the enameled wire.

[0012] Preferably, when the number of enameled wire layers LY2 is even, the number of enameled wire layers LYQ2 tangential to the bottom of the insulation skeleton in the winding coil is M+LY2 / 2 layers; when the number of enameled wire layers LY2 is odd, the number of enameled wire layers LYQ2 tangential to the bottom of the insulation skeleton in the winding coil is M+(LY2-1) / 2 layers.

[0013] Preferably, the adjacent two enameled wires in the winding coil are arranged tangentially.

[0014] Preferably, the iron core slot bottom surface and the iron core connecting inclined surface, the iron core connecting inclined surface and the transition connecting surface one, the adjacent two transition connecting surfaces one, and the transition connecting surface one and the iron core tooth portion are arranged in intersection or are connected by a circular arc surface.

[0015] Preferably, the circular arc concave surface and the skeleton connecting inclined surface, the circular arc concave surface and the transition connecting surface two, and the circular arc concave surface and the skeleton tooth portion are arranged tangentially.

[0016] Preferably, the insulation skeleton is a whole circle structure, the inner side of which is provided with a plurality of skeleton tooth portions, and the root of each skeleton tooth portion is provided with a skeleton slot bottom surface, a skeleton connecting inclined surface and M transition connecting surfaces two arranged in sequence.

[0017] The stator core punching sheet is also a whole circle structure, the inner side of which is provided with a plurality of iron core tooth portions, and the root of each iron core tooth portion is provided with an iron core slot bottom surface, an iron core connecting inclined surface and M transition connecting surfaces one arranged in sequence.

[0018] The number of the skeleton tooth parts is equal to the number of the core tooth parts.

[0019] Preferably, the plurality of stator core punching sheet layers are stacked and wrapped by the insulation skeleton to form a sub-block assembly, and the plurality of sub-block assemblies are arranged along a circumferential direction to form a whole-circle stator.

[0020] The technical scheme has the following beneficial effects:

[0021] The assembly structure can increase the number of the enameled wires tangent to the bottom of the insulation skeleton in the winding coil, increase the contact area of the winding coil and the insulation skeleton, and increase the slot fill rate, compared with the existing flat-bottom slot core structure, the assembly structure has a larger heat dissipation area of the winding, which can effectively reduce the winding temperature rise, thereby reducing the total temperature rise of the motor assembly; meanwhile, the winding structure is more stable and has smaller vibration.

[0022] Under the same number of turns, the assembly structure can reduce the winding difficulty of the enameled wire, simplify the winding process, and reduce the number of winding layers of the enameled wire.

[0023] Under the same total number of enameled wire layers, the assembly structure has more enameled wire layers tangent to the bottom of the insulation skeleton, and when outputting the same torque at the same speed, the wire current and the winding loss of the improved assembly structure are significantly reduced compared with the existing assembly structure.

[0024] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0026] Figure 1 is a sectional view of the assembly structure in example 1;

[0027] Figure 2 is an axonometric view of the insulation skeleton in example 1;

[0028] Figure 3 is an axonometric view of the stator core punching sheet in example 1;

[0029] Figure 4 is a schematic view of the stator core punching sheet in the whole-circle structure form;

[0030] Figure 5 is a sectional view of the existing assembly structure;

[0031] Figure 6 is a winding schematic diagram of the enameled wire in the existing assembly structure with the same number of turns as the assembly structure in Example 1;

[0032] Figure 7 is a U-phase current comparison schematic diagram of the assembly structure in Example 1 and the existing assembly structure under the same output speed (500 rpm) and the same torque (2 Nm);

[0033] Figure 8 is a wire current and winding loss comparison schematic diagram of the assembly structure in Example 1 and the existing assembly structure under the same output speed (500 rpm) and the same torque;

[0034] Figure 9 is a sectional view of the assembly structure in Example 2;

[0035] Figure 10 is an axonometric view of the insulation framework in Example 2;

[0036] Figure 11 is a top view of the stator core punching sheet in Example 2;

[0037] wherein, 11, the stator core punching sheet, 111, the core groove bottom surface, 112, the core connecting inclined surface, 113, the transition connecting surface one, 114, the core tooth part;

[0038] 21, the insulation framework, 211, the framework groove bottom surface, 212, the framework connecting inclined surface, 213, the circular arc concave surface, 214, the transition connecting surface two, 215, the framework tooth part;

[0039] 31, the winding coil, 311, the first layer of enameled wire, 312, the second layer of enameled wire, 313, the third layer of enameled wire, 314, the fourth layer of enameled wire. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below, and the preferred embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more comprehensive and comprehensive.

[0041] 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 the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0042] Example 1:

[0043] Referring to Figures 1-4 The embodiment provides an insulating framework and motor stator core assembly structure, which comprises an insulating framework 21 and a plurality of stator core punching sheets 11 arranged in the insulating framework 21 in a laminated manner.

[0044] Referring to Figure 1 and Figure 2 The insulating framework 21 is provided with a framework groove bottom surface 211, a framework connecting inclined surface 212 and M transition connecting surfaces II 214 arranged in sequence, the framework groove bottom surface 211 is arranged in intersection with the framework connecting inclined surface 212, the transition connecting surface II 214 at the head end is connected with the framework tooth portion 215 of the insulating framework 21, the transition connecting surface II 214 at the adjacent two positions is connected, and the transition connecting surface II 214 at the tail end is connected with the framework connecting inclined surface 212 through a circular arc concave surface 213; a notch is formed at the position where the framework groove bottom surface 211 of the insulating framework 21 and the framework tooth portion 215 meet through the framework connecting inclined surface 212, the transition connecting surface II 214 and the circular arc concave surface 213.

[0045] Referring to Figure 1 and Figure 3 The stator core punching sheet 11 is provided with a core groove bottom surface 111, a core connecting inclined surface 112 and M transition connecting surfaces I 113 arranged in sequence; wherein: the core groove bottom surface 111 is arranged in correspondence with the framework groove bottom surface 211, the core connecting inclined surface 112 is arranged in correspondence with the framework connecting inclined surface 212, and the transition connecting surface I 113 is arranged in one-to-one correspondence with the transition connecting surface II 214; further, the core groove bottom surface 111 and the core connecting inclined surface 112 are arranged in intersection, the transition connecting surface I 113 at the head end meets the core tooth portion 114 on the stator core punching sheet 11, the transition connecting surface I 113 at the tail end meets the core connecting inclined surface 112, and a notch is formed at the position where the core groove bottom surface 11 of the stator core punching sheet 11 and the core tooth portion 114 meet through the core connecting inclined surface 112 and the transition connecting surface I 113, so that the stator core punching sheet 11 can be arranged in the insulating framework 21; wherein M is a natural number greater than or equal to 1.

[0046] Preferably, the winding coil 31 formed by the enameled wire is arranged on the framework tooth portion 215 of the insulating framework 21, the winding coil 31 generally comprises a plurality of layers of enameled wires arranged from inside to outside, wherein the innermost layer of enameled wires is arranged in tangency with the framework tooth portion 215, and the outermost layer of enameled wires is arranged at the position where the framework groove bottom surface 211 and the framework connecting inclined surface 212 intersect (i.e. the enameled wire closest to the groove bottom in the outermost layer of enameled wires meets the intersection position between the framework groove bottom surface 211 and the framework connecting inclined surface 212). Preferably, the enameled wire is a round copper wire.

[0047] In the embodiment, the distance between the centers of the two adjacent circular arc concave surfaces 213 is equal to the outer diameter of the enameled wire, and the radius of the circular arc concave surface 213 is equal to the outer diameter of the enameled wire. In this way, the circular arc concave surface 213 can just accommodate the outer diameter of the enameled wire, and the transition connecting surface two 214 and the two adjacent circular arc concave surfaces 213 can just accommodate two enameled wires. Since the adjacent transition connecting surface two 214 are connected by the circular arc concave surface 213, more enameled wires can be tangentially arranged on the bottom of the insulation framework 21.

[0048] Preferably, the circular arc concave surface 213 is tangentially arranged with the framework connecting slope 212, the circular arc concave surface 213 is tangentially arranged with the transition connecting surface two 214, and the circular arc concave surface 213 is tangentially arranged with the framework tooth 215, so as to ensure smooth transition between surfaces.

[0049] Preferably, the iron core slot bottom surface 111 is intersectingly arranged with the iron core connecting slope 112, the iron core connecting slope 112 is intersectingly arranged with the transition connecting surface one 113, the adjacent two transition connecting surface ones 113 are intersectingly arranged, and the transition connecting surface one 113 is intersectingly arranged with the iron core tooth 114 or is connected by a circular arc surface. Whether the surfaces on the stator core punching sheet 11 are intersectingly arranged or connected by a circular arc surface, the assembly between the stator core punching sheet 11 and the insulation framework 21 will not be affected.

[0050] Preferably, the stator core punching sheet 11 is an integral circular structure, the inner side of the stator core punching sheet 11 is circumferentially arranged with a plurality of iron core teeth 114, the iron core connecting slope 112 and the transition connecting surface one 113 are arranged between the iron core tooth 114 and the iron core slot bottom surface 111 to form a notch (i.e., the two sides of the root of the iron core tooth 114 are provided with the iron core slot bottom surface 111, the iron core connecting slope 112, and the M transition connecting surface ones 113 arranged in sequence), as shown in FIG. 2. Figure 4 The insulation framework 21 is also an integral circular structure, the inner side of the insulation framework 21 is provided with a plurality of framework teeth 215, the two sides of the root of the framework tooth 215 are provided with the framework slot bottom surface 211, the framework connecting slope 212, and the M transition connecting surface two 214 arranged in sequence. After the stator core punching sheets 11 are stacked to form a stator core set, two insulation frameworks are used to wrap the stator core set from both sides.

[0051] In some embodiments, a plurality of stator core punching sheets 11 can form a complete circular structure, and correspondingly, a plurality of insulation frameworks also form a complete circular structure. After the plurality of stator core punching sheets 11 are stacked, the stator core punching sheets 11 are wrapped by the insulation frameworks to form a block assembly, and the plurality of block assemblies are arranged along the circumferential direction to form a circular stator.

[0052] Specifically, M in the embodiment is 1, and the winding coil includes a first layer of enameled wire 311, a second layer of enameled wire 312, a third layer of enameled wire 313, and a fourth layer of enameled wire 314.

[0053] Preferably, two adjacent enameled wires in the winding coil 31 are tangentially arranged. In the structure of the embodiment, when the number of enameled wire layers LY2 is even, the number of enameled wire layers LYQ2 tangential to the bottom of the insulation framework 21 in the winding coil is 1+LY2 / 2; when the number of enameled wire layers LY2 is odd, the number of enameled wire layers LYQ2 tangential to the bottom of the insulation framework 21 in the winding coil is 1+(LY2-1) / 2.

[0054] Preferably, in the embodiment, the half-slot area of the stator core punching sheet 12 is S2, the distance between the slot bottom and the slot shoulder is H2, the maximum distance between the innermost layer of enameled wire and the outermost layer of enameled wire in the slot is X2, the half-slot length is L2, the minimum yoke thickness is Y2 (where the minimum yoke thickness should meet the magnetic flux density requirement and not cause magnetic saturation and increase the loss), the number of turns of the winding coil is N2, and the outer diameter of the enameled wire is D2. The arrangement of the winding coil satisfies X2×H2≥D2×D2×N2, and the slot fill rate C2 satisfies C2=N2×D2×D2×π / (4×S2).

[0055] Figure 5 The existing insulation framework and motor stator core assembly structure is shown, which includes an insulation framework 21 and a plurality of stator core punching sheets 11 arranged in layers inside the insulation framework 21. The insulation framework 21 and the stator core punching sheet 11 are both parallel tooth structures with flat bottom slots, as shown in FIG. 1, that is, the bottom surface 211 of the framework slot of the insulation framework 21 and the tooth part 215 of the insulation framework 21 are both arranged at right angles and form right angles. Figure 5

[0056] Similarly, the tooth part 215 of the insulation framework 21 is wound with a winding coil 31 formed by enameled wires, and the winding coil 31 generally includes a plurality of layers of enameled wires arranged from inside to outside. In order to maintain consistency, the winding coil also includes a first layer of enameled wire 311, a second layer of enameled wire 312, a third layer of enameled wire 313, and a fourth layer of enameled wire 314, and two adjacent enameled wires in the winding coil 31 are tangentially arranged.

[0057] ​Similarly, in the existing assembly structure of the insulating frame and the motor stator core, the area of ​​the half-slot is S1, the distance between the bottom of the slot and the shoulder of the slot is H1, the maximum distance between the bottom layer of enameled wire and the outermost layer of enameled wire in the slot is X1, the length of the half-slot bottom is L1, the minimum yoke thickness is Y1, the number of turns of the winding coil is N1, the number of layers of enameled wire is LY1, and the outer diameter of the enameled wire is D1. Then the arrangement of the winding coil satisfies X1×H1≥D1×D1×N1, and the slot fill factor C1 satisfies C1=N1×D1×D1×π / (4×S1).

[0058] like Figure 5 As shown, in the existing assembly structure, when the number of enameled wire layers LY1 is even, the number of enameled wire layers LYQ1 in the winding coil that are tangent to the bottom of the insulating frame 21 is LY1 / 2 layers; when the number of enameled wire layers LY1 is odd, the number of enameled wire layers LYQ1 in the winding coil that are tangent to the bottom of the insulating frame 21 is 1+(LY1-1) / 2 layers.

[0059] The enameled wire used in this embodiment is of the same specification as the enameled wire in the existing assembly structure. The minimum yoke thickness Y2 in this embodiment is equal to the minimum yoke thickness Y1 in the existing assembly structure (i.e., ensuring that the magnetic flux density at the minimum yoke thickness is equal for both under the same current). Figure 1 and Figure 5 A comparison shows that when the number of enameled wire layers LY2 in this embodiment is the same as the number of enameled wire layers LY1 in the existing assembly structure, this embodiment has one more turn in even-numbered layers compared to the existing assembly structure. That is, when LY2 and LY1 are the same and are even-numbered, LYQ2-LYQ1=1, N2-N1=LY2 / 2 is satisfied; when LY2 and LY1 are the same and are both odd-numbered, LYQ2-LYQ1=0, N2-N1=(LY2-1) / 2 is satisfied. Meanwhile, the slot fill factors C1 and C2 of the assembly structure in this embodiment and the existing assembly structure satisfy the following:

[0060]

[0061] It can be seen that the slot fill rate of the assembly structure in this embodiment is higher than that of the existing assembly structure.

[0062] The assembly structure used in this embodiment has the following advantages:

[0063] See Figure 1 and Figure 5 In this embodiment, the contact area between the winding coil and the insulating frame is larger than that of the existing assembly structure, and the heat dissipation area of ​​the winding is larger, which can effectively reduce the temperature rise of the winding and thus reduce the temperature rise of the motor assembly; at the same time, the winding structure is more stable and the vibration is smaller.

[0064] See Figure 6When the number of layers of the assembled structure enameled wire LY2 of the embodiment and the number of layers of the enameled wire LY1 of the existing assembled structure satisfy LY1-LY2=1 and N1=N2, the winding difficulty of the enameled wire can be reduced, and the winding process can be simplified.

[0065] Referring to Figure 7 , the number of turns N2 of the assembled structure of the embodiment and the number of turns N1 of the existing assembled structure satisfy N2-N1=2 and LY1=LY2 (i.e., as shown in Figure 1 and Figure 5 , when the same torque of 2Nm is output at the same speed of 500rpm, the peak U-phase current U1 of the existing assembled structure is 7.43A, and the peak U-phase current U2 of the improved assembled structure in the embodiment is 7.14A, which is reduced by 3.9% compared with U1. The reduction of the current can effectively reduce the loss (about 1.5% reduction of copper loss), effectively reduce the winding temperature rise, and reduce the temperature rise of the motor assembly.

[0066] Referring to Figure 8 , the number of turns N2 of the assembled structure of the embodiment and the number of turns N1 of the existing assembled structure satisfy N2-N1=2 and LY1=LY2 (i.e., as shown in Figure 1 and Figure 5 , when the same torque is output at the same speed of 500rpm, the wire current and winding loss of the improved assembled structure in the embodiment are significantly reduced compared with the existing assembled structure.

[0067] Embodiment 2:

[0068] The difference between the embodiment and the embodiment 1 is that the value of M in the embodiment is equal to 2. Referring to Figures 9-11 , the insulation framework 21 of the embodiment is provided with two transition connection surfaces two 214 between the framework connecting bevel 212 and the framework tooth part 215, and the stator core punching sheet 11 is provided with two transition connection surfaces one 113 between the core connecting bevel 112 and the core tooth part 114. As shown in Figure 9 , in the case that the number of layers of the enameled wire is also four, the number of layers of the enameled wire tangent to the bottom of the insulation framework 21 in the embodiment is more, and the advantage compared with the existing assembled structure is more obvious. The embodiment can further increase the slot area, thereby further increasing the slot fill rate.

[0069] When the number of layers of the enameled wire LY2 is even, the number of layers of the enameled wire LYQ2 tangent to the bottom of the insulation framework 21 in the winding coil is 2+LY2 / 2; when the number of layers of the enameled wire LY2 is odd, the number of layers of the enameled wire LYQ2 tangent to the bottom of the insulation framework 21 in the winding coil is 2+(LY2-1) / 2.

[0070] According to the embodiment 1 and the embodiment 2, it can be concluded that the relationship between the number of the layers of the enameled wire LYQ2 tangent to the bottom of the insulating framework 21 in the winding coil and M is: when the number of the layers of the enameled wire LY2 is even, the number of the layers of the enameled wire LYQ2 tangent to the bottom of the insulating framework 21 in the winding coil is M+LY2 / 2; when the number of the layers of the enameled wire LY2 is odd, the number of the layers of the enameled wire LYQ2 tangent to the bottom of the insulating framework 21 in the winding coil is M+(LY2-1) / 2. It can be known in combination with the embodiment 1 and the embodiment 2 that the greater the value of M is, the more the number of the layers of the enameled wire tangent to the bottom of the insulating framework 21 is in theory, and the slot fill factor can be further increased.

[0071] The preferred embodiments of the present application have been described above with the preferred embodiments, but are not intended to limit the present application, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An assembly structure for an insulating frame and a motor stator core, characterized in that, It includes an insulating frame (21) and multiple stator core laminations (11) stacked inside the insulating frame (21); The insulating frame (21) is provided with a frame groove bottom surface (211), a frame connecting inclined surface (212), and M transition connecting surfaces (214) arranged in sequence. The frame groove bottom surface (211) and the frame connecting inclined surface (212) are intersected. The transition connecting surface (214) at the beginning and the frame teeth (215) of the insulating frame (21), the two adjacent transition connecting surfaces (214), and the transition connecting surface (214) at the end and the frame connecting inclined surface (212) are all connected by a circular arc concave surface (213). The stator core lamination (11) is provided with a core slot bottom surface (111), a core connecting inclined surface (112), and M transition connecting surfaces (113) arranged in sequence; wherein: the core slot bottom surface (111) is correspondingly arranged with the skeleton slot bottom surface (211), the core connecting inclined surface (112) is correspondingly arranged with the skeleton connecting inclined surface (212), the transition connecting surface (113) is correspondingly arranged with the transition connecting surface (214), and the first transition connecting surface (113) at the beginning is connected with the core tooth (114) on the stator core lamination (11), and the second transition connecting surface (113) at the end is connected with the core connecting inclined surface (112); wherein, M is a natural number greater than or equal to 1.

2. The assembly structure of the insulating frame and the motor stator core according to claim 1, characterized in that, The insulating frame (21) has a frame tooth (215) on which a winding coil (31) formed of enameled wire is wound. The winding coil (31) includes multiple layers of enameled wire arranged from the inside to the outside. The innermost layer of enameled wire is tangential to the frame tooth (215), and the outermost layer of enameled wire is located at the position where the bottom surface (211) of the frame groove intersects with the inclined surface (212) of the frame connection.

3. The assembly structure of the insulating frame and the motor stator core according to claim 2, characterized in that, The distance between the centers of two adjacent concave arcs (213) is equal to the outer diameter of the enameled wire.

4. The assembly structure of the insulating frame and the motor stator core according to claim 3, characterized in that, The radius of the concave arc surface (213) is equal to the outer radius of the enameled wire.

5. The assembly structure of the insulating frame and the motor stator core according to claim 4, characterized in that, When the number of enameled wire layers LY2 is even, the number of enameled wire layers LYQ2 in the winding coil that are tangent to the bottom of the insulating frame (21) is M+LY2 / 2 layers; when the number of enameled wire layers LY2 is odd, the number of enameled wire layers LYQ2 in the winding coil that are tangent to the bottom of the insulating frame (21) is M+(LY2-1) / 2 layers.

6. The assembly structure of the insulating frame and the motor stator core according to claim 2, characterized in that, The adjacent enameled wires in the winding coil (31) are tangentially arranged.

7. The assembly structure of the insulating frame and the motor stator core according to claim 1, characterized in that, The core groove bottom surface (111) and the core connecting inclined surface (112), the core connecting inclined surface (112) and the first transition connecting surface (113), the two adjacent first transition connecting surfaces (113), and the first transition connecting surface (113) and the core tooth (114) are all intersecting or connected by a circular arc surface.

8. The assembly structure of the insulating frame and the motor stator core according to claim 1, characterized in that, The concave surface (213) and the inclined surface (212) connecting the skeleton, the concave surface (213) and the transition connecting surface (214), and the concave surface (213) and the skeleton teeth (215) are all tangent to each other.

9. The assembly structure of the insulating frame and the motor stator core according to any one of claims 1-8, characterized in that, The insulating frame (21) is a circular structure with multiple frame teeth (215) on its inner side. The frame teeth (215) have a frame groove bottom surface (211), a frame connecting inclined surface (212), and M transition connecting surfaces (214) arranged in sequence on both sides of the root of each frame tooth (215). The stator core lamination (11) is also a round structure, with multiple core teeth (114) on its inner side. The root of the core teeth (114) is provided with a core groove bottom surface (111), a core connecting inclined surface (112), and M transition connecting surfaces (113) arranged in sequence on both sides. The number of skeleton teeth (215) is equal to the number of iron core teeth (114).

10. The assembly structure of the insulating frame and the motor stator core according to any one of claims 1-8, characterized in that, Multiple stator core laminations (11) are stacked and then wrapped by an insulating frame (21) to form a segmented assembly. The multiple segmented assemblies are arranged along the circumferential direction to form a complete circular stator.

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