Stator core structure and rotating electric machine capable of reducing the risk of wire breakage

Abstract

The utility model discloses a kind of stator core structure and rotating motor for reducing the risk of enameled wire broken skin, it includes core body, the core body is by multiple stator lamination stacking fixed composition, the stator lamination includes tooth shoe part, tooth body part and yoke, wherein, one end of the tooth body part is connected on the yoke, the other end extends along the radial direction of yoke outward or inward, the tooth shoe part is set in the one end of the tooth body part away from the yoke, the stator lamination includes outer layer lamination and inner layer lamination, the tooth body part width of the inner layer lamination is greater than the tooth body part width of the outer layer lamination;When stacking, the outer layer lamination is set in the both end side of multiple the inner layer lamination, and it is ladder-shaped transition structure;It is through the structure design of optimizing core tooth part, effectively reduce the friction damage that enameled wire is subjected to in winding process, improve the insulation performance and production efficiency of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor stator technology, and in particular to a stator core structure that reduces the risk of enameled wire breakage and a rotating motor. Background Technology

[0002] A rotating electric motor consists of a stator and a rotor. The stator mainly comprises a stator core and windings, which are typically made of enameled wire. Some stator coils are formed directly on the stator core using a winding machine. The stator core is made by stacking multiple identical laminations, and then the core teeth are coated with insulating varnish. However, the edges of the formed stator core teeth are right-angled, and although coated with insulating varnish, the edges are still relatively sharp. Figure 1 As shown, during the winding process, the enameled wire is still easily cut by the friction of the tooth edge, which can damage the enamel, affect the insulation performance of the motor, and may even cause a short circuit.

[0003] To address the aforementioned issues, existing technologies typically employ chamfering the edges of the stator teeth that are not coated with insulating varnish. However, this method is not only complex and inefficient, but also makes it difficult to control the chamfer size, which can easily lead to an excessively large or small chamfer, affecting the consistency of the iron core and thus reducing the electromagnetic performance of the motor. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a stator core structure that reduces the risk of enameled wire breakage. By optimizing the structural design of the core teeth, it effectively reduces the frictional damage to the enameled wire during winding, thereby improving the insulation performance and production efficiency of the motor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stator core structure for reducing the risk of wire insulation breakage includes a core body formed by stacking multiple stator laminations. Each stator lamination includes a toothed shoe portion, a toothed body portion, and a yoke portion. One end of the toothed body portion is connected to the yoke portion, and the other end extends radially outward or inward along the yoke portion. The toothed shoe portion is located at the end of the toothed body portion away from the yoke portion. Each stator lamination includes outer laminations and inner laminations. The width of the toothed body portion of the inner lamination is greater than the width of the toothed body portion of the outer lamination. During stacking, the outer laminations are symmetrically arranged on both ends of the multiple inner laminations to form a stepped transition structure.

[0007] As a preferred embodiment, the core body has multiple outer laminations at both axial ends, and the multiple outer laminations at the same end are stacked continuously.

[0008] As a preferred embodiment, the toothed portions of the multiple outer laminations at the same end have the same width.

[0009] As a preferred embodiment, the width of the toothed portion of the multiple outer laminations at the same end varies in a gradient, and decreases sequentially from the axial direction of the iron core body outward.

[0010] As a preferred embodiment, the difference between the tooth width of the inner lamination and the tooth width of the outer lamination is 0.2 mm to 0.5 mm.

[0011] This utility model also provides a rotating motor, including a stator core, wherein the stator core includes the stator core structure described in any of the above-mentioned embodiments.

[0012] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly involves setting the width of the stator laminations at both ends of the iron core body to be smaller than that of the stator laminations in the middle, creating a stepped transition structure at the edge of the tooth body. After the iron core body is coated with insulating varnish, the insulating varnish surface forms a larger rounded corner at the edge of the stator tooth body, resulting in a smoother arc. This increases the contact area between the enameled wire and the edge of the tooth body during winding, reduces the direct contact area between the enameled wire and the tooth tip, lowers the probability of insulation layer damage caused by mechanical friction, reduces scratch damage, and lowers the risk of enameled wire breakage, thereby improving the reliability and safety of motor operation. At the same time, the large rounded corner of the tooth body edge can guide the enameled wire to naturally conform to the tooth body, reducing twisting and stretching during winding, lowering the risk of wire breakage, and improving the yield of automated production.

[0013] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the existing stator core assembly structure;

[0015] Figure 2 This is a top view schematic diagram of the iron core body according to an embodiment of this utility model;

[0016] Figure 3 This is an embodiment of the present utility model. Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the outer lamination structure of an embodiment of the present invention;

[0018] Figure 5 This is a schematic diagram of the inner layer lamination structure according to an embodiment of the present invention;

[0019] Figure 6 This is a schematic diagram of the iron core body before coating, according to an embodiment of this utility model;

[0020] Figure 7 This is a schematic diagram of the structure of the iron core body after coating according to an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100. Iron core body;

[0023] 200. Stator lamination; 201. Toothed part; 202. Toothed body; 203. Yoke;

[0024] 210. Outer layer laminations;

[0025] 220. Inner layer stamping. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Please see Figures 1 to 7This invention provides a stator core structure to reduce the risk of wire insulation damage, comprising a core body 100 formed by stacking multiple stator laminations 200. Each stator lamination 200 includes a toothed shoe portion 201, a toothed body portion 202, and a yoke portion 203. One end of the toothed body portion 202 is connected to the yoke portion 203, and the other end extends radially outward or inward along the yoke portion 203. The toothed shoe portion 201 is located at the end of the toothed body portion 202 away from the yoke portion 203. Each stator lamination 200 includes an outer lamination 210 and an inner lamination 220. The width of the tooth body 202 of the lamination 220 is greater than the width of the tooth body 202 of the outer lamination 210. During stacking, the outer lamination 210 is symmetrically arranged on both ends of the multiple inner laminations 220, thereby forming a stepped transition structure with the inner lamination 210 being larger and the outer lamination 220 being smaller on the edge side of the tooth body 202. After the iron core body 100 is coated with insulating varnish, the insulating varnish forms a larger rounded corner and a smoother arc at the edge of the stator tooth body, thereby increasing the contact area between the enameled wire and the edge side of the tooth body during the winding process, reducing the risk of enameled wire breakage, and thus improving the reliability and safety of motor operation.

[0029] In this embodiment, the iron core body 100 is provided with multiple outer laminations 210 at both axial ends, and the multiple outer laminations 210 at the same end are stacked continuously.

[0030] In other embodiments, the toothed portions 202 of the plurality of outer laminations 210 at the same end have the same width.

[0031] In this embodiment, the width of the toothed portion 202 of the plurality of outer laminations 210 at the same end varies in a gradient, and decreases sequentially outward from the axial direction of the core body 100, such as... Figure 6 As shown, this allows the insulating varnish to form a larger rounded corner at the edge of the stator tooth body, with a smoother arc, further optimizing the adhesion of the insulating varnish to the edge of the iron core.

[0032] Furthermore, the difference between the width of the toothed portion 202 of the inner lamination 220 and the width of the toothed portion 202 of the outer lamination 210 is 0.2mm to 0.5mm. For example... Figure 4 and Figure 5 As shown, the width of the tooth body 202 of the inner lamination 220 is M, and the width of the tooth body 202 of the outer lamination 210 is N. The difference between the tooth body widths of the two, namely MN, ranges from 0.2mm to 0.5mm.

[0033] This utility model also provides a rotating motor, including a stator core, wherein the stator core includes the stator core structure described in any of the above-mentioned embodiments.

[0034] As can be seen from the above technical solution, it mainly involves setting the width of the tooth body portion 202 of the stator laminations 200 at both ends of the iron core body 100 to be smaller than the width of the tooth body portion 202 of the stator laminations 200 in the middle, so that the edge of the tooth body portion 202 has a stepped reduction transition structure. After the iron core body 100 is coated with insulating varnish, the insulating varnish surface forms a larger rounded corner at the edge of the stator tooth body, and the curvature is smoother. This increases the contact area between the enameled wire and the edge of the tooth body during the winding process, reduces the direct contact area between the enameled wire and the tooth tip, reduces the probability of insulation layer damage caused by mechanical friction, reduces scratch damage, and reduces the risk of enameled wire breakage, thereby improving the reliability and safety of motor operation. At the same time, the large rounded corner of the tooth body edge can guide the enameled wire to naturally fit the tooth body, reduce twisting and stretching during the winding process, reduce the risk of wire breakage, and improve the yield of automated production.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stator core structure for reducing the risk of enameled wire sheath breakage, comprising a core body, characterized in that, The core body is formed by stacking multiple stator laminations. Each stator lamination includes a toothed shoe portion, a toothed body portion, and a yoke portion. One end of the toothed body portion is connected to the yoke portion, and the other end extends radially outward or inward along the yoke portion. The toothed shoe portion is located at the end of the toothed body portion away from the yoke portion. Each stator lamination includes outer laminations and inner laminations. The width of the toothed body portion of the inner lamination is greater than the width of the toothed body portion of the outer lamination. During stacking, the outer laminations are symmetrically arranged on both ends of the multiple inner laminations to form a stepped transition structure.

2. The stator core structure for reducing the risk of enameled wire breakage according to claim 1, characterized in that, The core body has multiple outer laminations at both axial ends, and the multiple outer laminations at the same end are stacked continuously.

3. The stator core structure for reducing the risk of enameled wire breakage according to claim 2, characterized in that, The toothed portions of multiple outer laminations at the same end have the same width.

4. The stator core structure for reducing the risk of enameled wire breakage according to claim 2, characterized in that, The tooth widths of the multiple outer laminations at the same end vary in a gradient, decreasing sequentially outward from the axial direction of the core body.

5. The stator core structure for reducing the risk of enameled wire breakage according to claim 1, characterized in that, The difference between the width of the toothed portion of the inner lamination and the width of the toothed portion of the outer lamination is 0.2 mm to 0.5 mm.

6. A rotating electric motor, comprising a stator core, characterized in that, The stator core comprises the stator core structure as described in any one of claims 1 to 5.

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