Stator punching sheet, stator assembly and motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a stator punching sheet, a stator assembly and a motor, the stator punching sheet comprises a yoke part formed on the inner side of the stator punching sheet and a plurality of tooth parts annularly arranged on the yoke part, a wire embedding groove is formed between every two adjacent tooth parts and is used for embedding a winding wrapped with an insulating layer, and the winding is wound on the yoke part. A groove opening of the wire embedding groove is provided with a tooth boot portion protruding inwards, the tooth boot portion comprises an inner side tooth boot surface inclining towards the outer side of the groove opening, the inner side tooth boot surface is provided with a protrusion, a groove is formed between the protrusion and the root portion of the tooth boot portion, and the top of the protrusion is used for abutting against the insulating layer. According to the scheme of the utility model, because the projection on the tooth boot part can abut against the insulating layer and one side of the projection forms the groove, and the groove structure can cooperate with the outer side of the insulating layer to form the cavity, the insulating paint can be collected in the cavity, and the condition that the insulating paint leaks from the notch can be effectively improved. And the cured insulating paint can ensure the firmness of the structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially is a kind of stator lamination, stator assembly and motor. BACKGROUND

[0002] Stator assembly is an important component in motor, it usually includes core, winding and insulating part. Core is usually formed by stacking multiple circular annular stator laminations along the axial direction, each stator lamination includes yoke and multiple tooth parts, multiple tooth parts are arranged along the circumferential direction of yoke, multiple tooth parts protrude inwardly from yoke along the radial direction, and embedded wire slot is formed between adjacent tooth parts. Winding is embedded in embedded wire slot, and winding generates magnetic field through current to drive the rotation of motor rotor. Insulating part usually includes insulating layer and insulating varnish to isolate winding from core;Insulating part usually includes insulating layer and insulating varnish, insulating layer is used to wrap winding for insulation treatment, then insulating varnish is impregnated, and finally insulating varnish is solidified to fix winding.

[0003] Because the slot of existing embedded wire slot is usually smooth profile, when insulating varnish drips between insulating layer and embedded wire slot, insulating varnish is easy to leak from the slot of embedded wire slot, and there is less insulating varnish between the slot of embedded wire slot and insulating paper, which is easy to cause the structure of stator assembly to be loose. SUMMARY

[0004] To improve the problem that existing stator assembly structure is loose due to insulating varnish leakage, the utility model provides a kind of stator lamination, stator assembly and motor.

[0005] According to the embodiment of the utility model, a first aspect provides a kind of stator lamination, including the yoke formed in the inside of the stator lamination and the multiple tooth parts of ring being arranged in the yoke, one embedded wire slot is formed between adjacent two tooth parts to embed the winding wrapped insulating layer,

[0006] The slot of the embedded wire slot is provided with inwardly protruding tooth shoe part, the tooth shoe part includes the inside tooth shoe face inclined to the outside of slot, the inside tooth shoe face is provided with protrusion, the protrusion and the root of the tooth shoe part form groove, and the top of the protrusion is used to abut the insulating layer.

[0007] In some embodiments, the slot bottom and slot side wall of the embedded wire slot are rectangular channel steel.

[0008] In some embodiments, the included angle between the slot side wall of the embedded wire slot and the inside tooth shoe face is α, wherein α≥100°.

[0009] According to the embodiment of the utility model, a second aspect provides a kind of stator assembly, including core, and the core is formed by stacking the stator lamination along the axial direction.

[0010] In some embodiments, the stator assembly further comprises a winding embedded in the embedded wire slot, the winding is wrapped with an insulation layer, and the embedded wire slot and the insulation layer are impregnated with an insulation paint.

[0011] In some embodiments, the insulation layer is an insulation paper.

[0012] In some embodiments, the wire of the winding is a flat wire.

[0013] According to the embodiments of the utility model, the third aspect provides a motor, comprising a rotor assembly and the aforementioned stator assembly, the rotor assembly is rotatably arranged on the inner side of the stator assembly.

[0014] In the stator lamination of the utility model, the protrusion on the tooth shoe part can abut against the insulation layer, and the side of the protrusion forms a groove, the groove structure can cooperate with the outer side of the insulation layer to form a cavity, the insulation paint is dropped between the insulation layer and the embedded wire slot, the insulation paint can be collected in the cavity, the leakage of the insulation paint from the slot opening can be effectively improved, and the solidified insulation paint can ensure the firmness of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the stator assembly of the embodiment;

[0016] Figure 2 It is Figure 1 It is an enlarged structural schematic view of A in the middle;

[0017] Figure 3 It is a partial structural schematic view of the stator lamination.

[0018] In the drawing: the stator lamination 100; the yoke part 110; the tooth part 120; the tooth shoe part 121; the inner side tooth shoe surface 122; the embedded wire slot 130; the protrusion 140; the winding 200; the insulation layer 300; the insulation paint 310. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further described in detail by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0020] The structures, proportions, sizes and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, so that people skilled in the art can understand and read, and are not used to limit the limiting conditions of the implementation of the utility model. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effect and purpose that can be produced by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0021] The orientation or positional relationship referred to in the specification as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility new type. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] With reference to Figures 1-3 The embodiment provides a motor, which comprises a stator assembly arranged on the outer side and a rotor assembly (not shown in the figure) arranged on the inner side, wherein the rotor assembly can rotate relative to the stator assembly to realize the conversion between electric energy and mechanical energy.

[0023] With reference to Figure 2 The stator assembly of the embodiment comprises a core and a winding 200, and the core is formed by axially stacking a plurality of annular stator laminations 100. Each stator lamination 100 comprises a yoke portion 110 formed on the inner side of the stator lamination 100 and a plurality of tooth portions 120 arranged around the yoke portion 110. The plurality of tooth portions 120 are uniformly distributed along the circumferential direction of the yoke portion 110, and the tooth portions 120 protrude towards the inner side of the yoke portion 110 along the radial direction. A slot 130 is formed between adjacent two tooth portions 120, and the winding 200 is embedded in the slot 130.

[0024] The slot opening of the slot 130 of the embodiment is provided with a tooth shoe portion 121 protruding towards the inner side, and the tooth shoe portion 121 narrows the width of the slot opening of the slot 130, and further makes the slot 130 have a semi-closed structure. By adjusting the width of the slot opening, the magnetic field distribution can be adjusted, so that the performance of the motor can be controlled. The semi-closed slot 130 can improve the torque density and power density of the motor, so that the motor has superior performance in small size, high speed and high power applications.

[0025] The tooth shoe portion 121 of the embodiment comprises an inner tooth shoe surface 122, which is connected with the inner wall of the slot 130, so that the slot opening of the slot 130 is gradually and smoothly narrowed. The inner tooth shoe surface 122 is preferably inclined towards the outer side of the slot opening, so that the thickness of the tooth shoe portion 121 gradually thins from the root to the top. The inclined inner tooth shoe surface 122 makes the inside of the slot 130 have a larger space, so as to facilitate the assembly of the winding 200 into the slot 130.

[0026] The conductive wire in the winding 200 of the embodiment is preferably flat wire, and the groove bottom and the groove sidewall of the wire embedding groove 130 are preferably rectangular channel steel, so that the winding 200 can better fill the space in the wire embedding groove 130, can significantly improve the slot fill rate of the stator assembly, help to improve the output torque and power density of the motor, enhance the heat dissipation performance of the stator assembly, and ensure product consistency and production efficiency. It should be noted that the conductive wire of the winding 200 of some embodiments can be selected as conventional round wire according to the needs, and the wire embedding groove 130 can also be selected as other conventional shapes according to the needs. The winding mode of the winding 200 is prior art, and the embodiment will not be described here.

[0027] Specifically referring to Figure 2 and Figure 3 The inner side tooth shoe surface 122 of the embodiment is provided with a protrusion 140 near the middle portion, the top of the protrusion 140 is used to abut against the insulation layer 300, and the protrusion 140 forms a groove between the roots of the tooth shoe part 121. When the top of the protrusion 140 abuts against the insulation layer 300, the outer side of the insulation layer 300 and the groove structure can surround a cavity. The insulating paint 310 can be dropped between the insulation layer 300 and the wire embedding groove 130, and the insulating paint 310 can be collected in the cavity, which can effectively improve the leakage of the insulating paint 310 from the slot opening. The solidified insulating paint 310 can ensure the firmness of the structure.

[0028] The included angle between the groove sidewall of the wire embedding groove 130 and the inner side tooth shoe surface 122 of the embodiment is α, and α is preferably greater than or equal to 100°. When the inner side tooth shoe surface 122 is inclined to this angle, the inclined inner side tooth shoe surface 122 cooperates with the protrusion 140 thereon to facilitate the collection of the insulating paint 310 in the cavity for solidification, thereby ensuring the structural stability of the stator assembly.

[0029] The insulation layer 300 of the embodiment is preferably made of insulating paper, which has good ductility, chemical stability and low cost. The insulation layer 300 of some embodiments can also be selected as conventional insulating sleeves or insulating coatings according to the needs.

[0030] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0031] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which are within the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A stator lamination, comprising a yoke portion (110) formed inside the stator lamination (100) and a plurality of tooth portions (120) arranged around the yoke portion (110), a slot (130) formed between two adjacent tooth portions (120) for embedding a winding (200) wrapped with an insulation layer (300), characterized in that: a tooth shoe portion (121) protruding inwardly is arranged at the slot opening of the slot (130), the tooth shoe portion (121) comprises an inner tooth shoe surface (122) inclined towards the outside of the slot opening, a protrusion (140) is arranged on the inner tooth shoe surface (122), a groove is formed between the protrusion (140) and the root of the tooth shoe portion (121), and the top of the protrusion (140) is used to abut against the insulation layer (300). The slot bottom and the slot sidewall of the slot (130) are in the shape of a rectangular channel steel.

2. The stator lamination of claim 1, wherein: The included angle between the slot sidewall of the slot (130) and the inner tooth shoe surface (122) is α, wherein α≥100°.

3. A stator lamination according to claim 2, characterised in that: The core is formed by axially stacking the stator lamination (100) according to any one of claims 1-3.

4. A stator assembly comprising a core, characterised in that, The winding (200) embedded in the slot (130) is further included, the winding (200) is wrapped with the insulation layer (300), and the slot (130) and the insulation layer (300) are impregnated with an insulation varnish (310).

5. The stator assembly of claim 4, wherein: The insulation layer (300) is insulation paper.

6. The stator assembly of claim 5, wherein: The wire of the winding (200) is a flat wire.

7. The stator assembly of claim 5, wherein: The rotor assembly and the stator assembly according to any one of claims 4-7 are included, and the rotor assembly is rotatably arranged inside the stator assembly.

8. An electric machine characterized by ​

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