Stator assembly applied to high-power motor

Abstract

The utility model discloses a stator assembly applied to a high-power motor. The stator assembly comprises a stator iron core, a stator framework, a terminal and a plastic package body, wherein the stator framework is arranged outside the stator iron core in an injection molding manner; the terminal is positioned at one end of the stator framework; the outer peripheral surface of the yoke part of the stator core is provided with a material guide groove which extends along the axial direction and is arranged at two ends of the yoke part, the material guide groove is filled with an injection molding material which forms the stator framework to form a material guide body, the outer surface of the material guide body is provided with a long groove which extends along the axial direction, and the long groove is filled with the plastic package body. According to the utility model, the outer side of the yoke part of the stator iron core is provided with the material guide groove penetrating through the two ends, so that injection molding materials have more paths passing through the material guide groove and can flow into the stator iron core more uniformly, thereby improving the integrity of injection molding, and the material guide body can avoid accumulation or loss of the plastic packaging materials in the filling process, thereby improving the production efficiency. Therefore, the integrity of the plastic package is improved, and the stability and reliability of the stator assembly are improved when the stator assembly bears high torque and rotates at a high speed.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially, relates to a kind of stator assembly applied to high-power motor. BACKGROUND

[0002] In view of the demand of high-power motor to higher torque and speed, the stack height of stator core is often large, in order to better prevent the direct contact of stator core and moisture, dust and other pollutants in external environment, avoid the insulation performance of motor components to decline, prevent the surface corrosion, deformation or damage of stator core, high-power motor is injected by adopting integrated molding mode in stator core inner slot stator framework, and after installing winding and terminal, it is formed stator assembly by plastic packaging.

[0003] Although this injection molding process can significantly improve the safety and service life of the stator core, but in the process of injection molding the stator framework and subsequent complete covering the stator core, the injection material mainly flows from one end of the stator tooth surface to the other end, as the thickness of the stator framework is limited, the injection material may not cover all the areas it flows through, and the problem of incomplete injection molding is prone to occur. SUMMARY

[0004] In order to solve the technical problem of incomplete injection molding of the stator assembly formed by plastic packaging in the prior art, the utility model provides a stator assembly applied to high-power motor to solve the above problems.

[0005] The technical scheme adopted by the utility model to solve its technical problems is: a stator assembly applied to high-power motor, comprising a stator core, a stator framework injected on the outside of the stator core, a terminal located at one end of the stator framework, and a plastic package that integrally plastic packages the stator core, the stator framework and the terminal.

[0006] The outer circumferential surface of the yoke part of the stator core has a material guide groove extending axially to both ends of the yoke part, the injection material constituting the stator framework fills to form a material guide body at the material guide groove, the outer surface of the material guide body has an axially extending long groove, and the plastic package fills the long groove.

[0007] In the optional embodiment of the utility model, the cross section of the material guide groove is rectangular, circular, trapezoidal or irregular.

[0008] In the optional embodiment of the utility model, the outer opening width of the cross section of the material guide groove is less than the inner width of the cross section of the material guide body.

[0009] In the optional embodiment of the utility model, the cross section of the material guide groove is trapezoidal.

[0010] In the optional embodiment of the utility model, the cross section of the long groove is rectangular, circular or trapezoidal.

[0011] In the optional embodiment of the utility model, the cross section of long groove is rectangle, the ratio of cross section width of long groove and outside opening width of cross section of material guiding body is 1 / 3~2 / 3.

[0012] In the optional embodiment of the utility model, the ratio of cross section depth of long groove and cross section depth of material guiding body is 1 / 4~1 / 2.

[0013] In the optional embodiment of the utility model, the stator core includes a plurality of core monomers arranged circumferentially, and the yoke portion of each core monomer is provided with a material guiding groove.

[0014] In the optional embodiment of the utility model, the material guiding grooves are uniformly arranged in the circumferential direction.

[0015] In the optional embodiment of the utility model, the material guiding groove is located in the middle of the circumferential direction of the core monomer.

[0016] The utility model has the advantages of:

[0017] The utility model discloses a material guiding groove is arranged on the outside of the yoke portion of the stator core, so that the injection molding material has a path through the material guiding groove, can flow into the stator core more evenly, can ensure that the injection molding material can fill the stator core fully in the injection molding process, thereby improving the integrity of injection molding, and the material guiding body can avoid the accumulation or loss of plastic packaging material in the filling process, thereby improving the integrity of plastic packaging, and improving the stability and reliability of the stator assembly when bearing high torque and high speed rotation. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model is further illustrated below in connection with the drawings and examples.

[0019] Figure 1 It is the three-dimensional view of the stator assembly before plastic packaging of high-power motor of the utility model;

[0020] Figure 2 It is the schematic diagram of the stator core in-line state in the utility model;

[0021] Figure 3 It is Figure 1 The cross section schematic diagram of the stator monomer in the utility model;

[0022] Figure 4 It is the end face partial section view of the stator assembly of the utility model;

[0023] Figure 5 It is the structure schematic diagram of the material guiding body in the utility model.

[0024] In the figure, 1 is the stator core, 101 is the yoke, 102 is the tooth, 2 is the stator frame, 3 is the terminal, 4 is the encapsulation body, 5 is the guide groove, 6 is the injection material, 7 is the guide body, 8 is the long groove, and 9 is the core unit. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] Example 1

[0027] like Figures 1-3 As shown, a stator assembly for a high-power motor includes a stator core 1, a stator frame 2 injection-molded outside the stator core 1, a terminal 3 located at one end of the stator frame 2, and a molding compound 4 that integrally molds the stator core 1, the stator frame 2, and the terminal 3.

[0028] The outer circumferential surface of the yoke 101 of the stator core 1 has guide grooves 5 extending axially to both ends of the yoke 101. The injection molding material 6 that makes up the stator frame 2 fills the guide grooves 5 to form a guide body 7. The outer surface of the guide body 7 has an axially extending long groove 8, and the encapsulation body 4 fills the long groove 8. Both the stator frame 2 and the encapsulation body 4 are formed by injection molding and use the same materials. For ease of distinction, the material forming the stator frame 2 is referred to as the injection molding material 6, and the material forming the encapsulation body 4 is referred to as the encapsulation material.

[0029] The stator core 1 includes a yoke 101 and teeth 102 located on the inner circumferential surface of the yoke 101. In traditional injection molding processes, the injection material 6 mainly flows from one end of the inner surface of the teeth 102 to the other. This invention, by providing a guide groove 5 in the yoke 101, provides the injection material 6 with an additional path through the guide groove 5, allowing it to flow more evenly into the stator core 1 and accelerating the filling speed. This ensures that the injection material 6 fully fills the stator core 1 during injection molding, thereby improving the integrity of the stator frame 2. Similarly, the long groove 8 in the guide body 7 also accelerates the filling speed of the encapsulating material and avoids accumulation or loss of the encapsulating material during the filling process, thus improving the integrity of the encapsulation. The long groove 8 also increases the gripping force of the encapsulating body 4 on the stator core 1, thereby improving the stability and reliability of the stator assembly under high torque and high-speed rotation. The stator assembly is composed of several stator units, such as... Figure 3 The figure shows a cross-sectional schematic diagram of a single stator unit. As can be seen from the figure, the stator frame 2 forms a guide body 7 on the left side of the stator core 1. The guide body 7 also has a groove 8 that runs from top to bottom.

[0030] The patent number CN109274192B discloses that the insertion slot is provided on the outer circumferential surface of the stator core, and from the appearance, the insertion slot is very similar to the material guiding groove 5 in the utility model, but the disclosed patent is not processed by the process of integral injection molding, but the terminal box is connected with the stator core by using the insertion slot, and then the stator framework is inserted into the stator core from both ends, so the purpose and application range of the material guiding groove 5 in the utility model and the insertion slot in the disclosed patent are not the same.

[0031] The cross section of the material guiding groove 5 can be rectangular, circular, trapezoidal or irregular. The cross section of the long slot 8 can be rectangular, circular or trapezoidal. The material guiding body 7 is a plastic part filled between the material guiding groove 5 and the long slot 8.

[0032] In order to ensure the symmetry of the structure, the material guiding groove 5 is preferably uniformly arranged in the circumferential direction, and such uniform distribution ensures the consistency of the injection molding material 6 and the plastic sealing material in the filling process. Since the stator core 1 usually includes a plurality of core units 9 arranged in the circumferential direction, the material guiding groove 5 can be arranged at the yoke part 101 of each core unit 9. In further design, the material guiding groove 5 is located in the middle part of the core unit 9 in the circumferential direction.

[0033] Embodiment two

[0034] On the basis of embodiment one, in order to improve the connection strength of the injection molding material 6 and the stator core 1, and avoid the stator core 1 and the external plastic part from peeling off and separating when the stator assembly bears high torque and high speed rotation, the outer opening width of the cross section of the material guiding groove 5 is smaller than the inner width of the cross section of the material guiding body 7 in this embodiment. Thus, the stator framework 2 tightly holds the stator core 1 through the injection molding material 6 inside the material guiding groove 5. At the same time, the structure design of the material guiding groove 5 also helps the injection molding material 6 to stay inside the material guiding groove 5, avoiding overflowing out of the material guiding groove 5 under the impact of the injection molding material.

[0035] As shown in Figs. 1 and 2, the cross section of the material guiding groove 5 is trapezoidal, and the cross section of the long slot 8 is rectangular in this embodiment. Figure 4 Figure 5 The size relationship between the long slot 8 and the material guiding groove 5 will affect the injection molding effect. If the size of the long slot 8 is too large, the stator framework 2 will not be completely injection molded, and if the size of the long slot 8 is too small, the plastic sealing material will be gathered or missing, affecting the smoothness of the plastic sealing surface. Therefore, in further design, the ratio of the width of the cross section of the long slot 8 to the outer opening width of the cross section of the material guiding body 7 is 1 / 3~2 / 3. The width refers to the horizontal direction size in Fig. 3.

[0036] The ratio of the depth of the cross section of the long slot 8 to the depth of the cross section of the material guiding body 7 is 1 / 4~1 / 2. The depth refers to the vertical direction size in Fig. 3. Figure 5 Figure 5 ​​​

[0037] Further, in the description of the present application, the meaning of "several" is two or more, unless otherwise specified.

[0038] In this description, illustrative expressions of the terms do not necessarily refer to the same embodiment. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in a suitable manner.

[0039] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A stator assembly for use in a high power electric machine, characterized in that: The application relates to a stator core (1), a stator framework (2) which is injection molded outside the stator core (1), a terminal (3) at one end of the stator framework (2), and a plastic sealing body (4) which integrally seals the stator core (1), the stator framework (2) and the terminal (3). The outer circumferential surface of the yoke part (101) of the stator core (1) is provided with material guide grooves (5) extending to both ends of the yoke part (101) in the axial direction, the injection molding material (6) constituting the stator framework (2) is filled to form a material guide body (7) at the material guide grooves (5), the outer surface of the material guide body (7) is provided with long grooves (8) extending in the axial direction, and the plastic sealing body (4) fills the long grooves (8).

2. The stator assembly for use in high power electric machines according to claim 1, characterized in that: The cross section of the material guide groove (5) is rectangular, circular, trapezoidal or irregular.

3. The stator assembly for use in high power electric machines according to claim 1, characterized in that: The outer opening width of the cross section of the material guide groove (5) is smaller than the inner width of the cross section of the material guide body (7).

4. The stator assembly for use in high power electric machines according to claim 3, characterized in that: The cross section of the material guide groove (5) is trapezoidal.

5. The stator assembly for use in high power electric machines according to claim 1, characterized in that: The cross section of the long groove (8) is rectangular, circular or trapezoidal.

6. The stator assembly for use in high power electric machines according to claim 1, characterized in that: The cross section of the long groove (8) is rectangular, and the ratio of the cross section width of the long groove (8) to the outer opening width of the cross section of the material guide body (7) is 1 / 3-2 / 3.

7. The stator assembly for use in high power electric machines according to claim 6, characterized in that: The ratio of the cross section depth of the long groove (8) to the cross section depth of the material guide body (7) is 1 / 4-1 / 2.

8. The stator assembly for use in high power electric machines according to claim 1, characterized in that: The stator core (1) comprises a plurality of core monomers (9) arranged in a circle, and the outer circumferential surface of the yoke part (101) of each core monomer (9) is provided with a material guide groove (5).

9. The stator assembly for use in high power electric machines according to claim 8, characterized in that: The material guide grooves (5) are uniformly arranged in the circumferential direction.

10. The stator assembly for use in high power electric machines according to claim 8, characterized in that: The material guide grooves (5) are located in the middle part of the circumferential direction of the core monomer (9).

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