Motor stator punching sheet

Abstract

The utility model provides a motor stator punching sheet, which solves the problem of poor structural strength of the existing punching sheet. The motor stator punching sheet comprises a circular-ring-shaped body, a circle of roughly T-shaped tooth bodies are formed on the inner wall of the body, a winding groove is formed between every two adjacent tooth bodies, each tooth body is composed of a circular-arc-shaped head and a root used for connecting the head and the body, a row of tooth grooves axially penetrate through the inner side of the head, a circular-arc groove is axially formed in the body, and the circular-arc-shaped groove is formed in the body. The arc grooves and the tooth bodies are the same in number and correspond one to one in position, a heat dissipation groove axially penetrates through each root part, one end of each heat dissipation groove extends to be communicated with the corresponding arc groove, the heat dissipation grooves are approximately trapezoidal, and the width of each heat dissipation groove is gradually increased in the direction from the heat dissipation grooves to the corresponding arc grooves. The motor stator punching sheet is high in strength.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an electric motor, particularly an electric motor stator lamination. Background Technology

[0002] Stator laminations are stamped parts of the motor stator. They are an important component of the motor stator and are made from silicon steel sheets through processes such as stamping and punching.

[0003] Existing stator laminations, such as the one disclosed in the Chinese Patent Database (application number: 201520195027.0), include an annular lamination body. Multiple T-shaped teeth are evenly distributed on the inner circumference of the lamination body. These teeth extend towards the center of the lamination body and form hollow inner circular holes. Grooves are formed between adjacent teeth. The teeth are characterized by comprising an arcuate portion and a vertical portion. One end of the vertical portion is connected to the lamination body, and the other end is connected to the middle of the outer circumference of the arcuate portion. Multiple convex teeth are evenly distributed on the inner circumference of the arcuate portion, and grooves are formed between adjacent convex teeth. There are four convex teeth and three grooves. The lamination body also has a first heat dissipation groove, and the convex teeth have a second heat dissipation groove. The first and second heat dissipation grooves are connected to form a T-shape.

[0004] In the above-mentioned lamination, the second heat dissipation groove is a rectangular structure. The cross-sectional shape of this structure makes it prone to stress concentration when subjected to radial pressure, especially at the corners of the groove, which affects the radial compressive strength of the lamination and thus affects the overall structural stability and strength of the lamination. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a motor stator lamination with a stable structure.

[0006] The objective of this utility model can be achieved through the following technical solution: a motor stator lamination, comprising a ring-shaped body, a ring of roughly T-shaped teeth formed on the inner wall of the body, and a winding groove formed between adjacent teeth, the teeth consisting of an arc-shaped head and a root for connecting the head and the body, and a row of tooth grooves axially penetrating the inner side of the head, and an arc groove axially formed on the body, the number of arc grooves and teeth being the same and their positions corresponding one-to-one, and a heat dissipation groove axially penetrating each root, one end of the heat dissipation groove extending to connect with the corresponding arc groove, characterized in that the heat dissipation groove is roughly trapezoidal, and the width of the heat dissipation groove gradually increases from the heat dissipation groove towards the corresponding arc groove.

[0007] The heat sink is designed with a trapezoidal structure. The trapezoidal cross-sectional shape and inclined sidewalls allow it to better disperse pressure when subjected to radial pressure, reducing stress concentration. This helps to increase the overall strength and stability of the heat sink, thereby effectively enhancing the compressive strength and structural stability of the lamination.

[0008] In the aforementioned motor stator laminations, the heat dissipation slot includes two opposing inclined walls, each with an axially penetrating notch. The notch notch increases the heat exchange area of ​​the heat dissipation slot, further accelerating heat dissipation, and also breaks up the inclined walls, further reducing stress concentration and making the structure of the heat dissipation slot more stable, thereby further enhancing the compressive strength and structural stability of the laminations.

[0009] In the aforementioned motor stator laminations, the cross-section of the notch is arc-shaped to enhance the strength of the inclined wall.

[0010] In the aforementioned motor stator laminations, both ends of the arc groove are arc-shaped to simultaneously enhance heat dissipation and strength of the laminations.

[0011] In the aforementioned motor stator laminations, axial guide holes are etched through the body. There are at least two guide holes, evenly distributed along the circumference of the body, and the guide holes and arc grooves are also distributed along the circumference of the body. The guide holes are designed to cooperate with guide posts for stacking and mounting multiple stator laminations, and also to further enhance heat dissipation of the laminations.

[0012] In the aforementioned motor stator laminations, the guide hole type is a round hole.

[0013] In the aforementioned motor stator laminations, multiple welding grooves are axially penetrating the outer wall of the body, and the axial cross-section of the welding grooves is approximately "W" shaped, used for stacking and welding multiple stator laminations to make the stator core structure more stable.

[0014] Compared with existing technologies, the stator laminations of this motor have the following advantages:

[0015] 1. The heat dissipation groove is designed as a trapezoidal structure. The trapezoidal cross-sectional shape and inclined sidewalls enable it to better disperse pressure when subjected to radial pressure, reduce stress concentration, and thus help increase the overall strength and stability of the heat dissipation groove, thereby effectively enhancing the compressive strength and structural stability of the lamination.

[0016] 2. Setting notches and grooves can increase the heat exchange area of ​​the heat sink, further accelerate the heat dissipation of the lamination, and break the inclined wall to further reduce stress concentration, making the structure of the heat sink more stable, thereby further enhancing the compressive strength and structural stability of the lamination. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the stator laminations of this motor.

[0018] Figure 2 This is a top view of the stator laminations of this motor.

[0019] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0020] In the figure, 1 is the body; 1a is the arc groove; 2 is the tooth body; 2a is the head; 2b is the root; 2c is the tooth groove; 2d is the heat dissipation groove; 2d1 is the inclined wall; 2d2 is the notch groove; 3 is the winding groove; 4 is the guide hole; and 5 is the welding groove. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] Motor stator laminations are stamped parts and are generally made of silicon steel sheet material.

[0023] Specifically

[0024] The stator lamination of this motor includes a ring-shaped body 1, with a ring of roughly T-shaped teeth 2 formed on the inner wall of the body 1, and a winding groove 3 formed between adjacent teeth 2. Figure 1 and Figure 2 As shown, the tooth body 2 consists of an arc-shaped head 2a and a root 2b connecting the head 2a and the body 1. A row of tooth grooves 2c, evenly distributed circumferentially along the body 1, runs axially through the inner side of the head 2a. Arc-shaped grooves 1a are axially formed on the body 1, with the same number and corresponding positions as the tooth body 2. Each root 2b has an axially extending strip-shaped heat dissipation groove 2d, one end of which extends to connect with the corresponding arc-shaped groove 1a. The heat dissipation groove 2d is approximately trapezoidal, and its width gradually increases from the heat dissipation groove 2d towards the corresponding arc-shaped groove 1a.

[0025] The heat sink 2d is designed with a trapezoidal structure. The trapezoidal cross-sectional shape and inclined sidewalls enable it to better disperse pressure when subjected to radial pressure, reducing stress concentration. This helps to increase the overall strength and stability of the heat sink 2d, thereby effectively enhancing the compressive strength and structural stability of the lamination.

[0026] To further explain, such as Figure 2 and Figure 3As shown, the heat dissipation groove 2d includes two opposing inclined walls 2d1, each with an axially penetrating notch 2d2. The notch 2d2 increases the heat exchange area of ​​the heat dissipation groove 2d, further accelerating heat dissipation from the lamination, and also breaks the inclined walls 2d1, further reducing stress concentration and making the structure of the heat dissipation groove 2d more stable, thereby further enhancing the compressive strength and structural stability of the lamination. Preferably, the cross-section of the notch 2d2 is arc-shaped to enhance the strength of the inclined walls 2d1.

[0027] In the actual product, each inclined wall 2d1 has two notched slots 2d2, and the two notched slots 2d2 on the same inclined wall 2d1 are distributed along the length of the heat dissipation slot 2d.

[0028] like Figure 1 and Figure 2 As shown, both ends of the arc groove 1a are arc-shaped to simultaneously enhance heat dissipation and strength of the stator laminations. A guide hole 4 is axially penetrating the body 1, with at least two guide holes 4 evenly distributed circumferentially along the body 1. The guide holes 4 and the arc groove 1a are also distributed circumferentially along the body 1. The guide holes 4 are designed to cooperate with guide posts for stacking and mounting multiple stator laminations, and to further enhance heat dissipation. Preferably, the guide holes 4 are circular holes. Multiple welding grooves 5 are axially penetrating the outer wall of the body 1, and the axial cross-section of the welding grooves 5 is approximately "W"-shaped, used for stacking and welding multiple stator laminations, making the stator core structure more stable.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A motor stator lamination, comprising a circular ring-shaped body (1), a circle of substantially T-shaped tooth bodies (2) formed on the inner wall of the body (1), and a winding slot (3) formed between two adjacent tooth bodies (2), the tooth body (2) is composed of a circular arc-shaped head (2a) and a root (2b) for connecting the head (2a) and the body (1), and an inner side of the head (2a) is axially penetrated by a row of tooth grooves (2c), the body (1) is axially provided with a circular arc groove (1a), the number of the circular arc groove (1a) and the tooth body (2) is the same and one-to-one corresponding, and each root (2b) is axially penetrated by a heat dissipation groove (2d), one end of the heat dissipation groove (2d) extends to the corresponding circular arc groove (1a), characterized in that, The heat dissipation groove (2d) is generally trapezoidal, and the groove width of the heat dissipation groove (2d) gradually increases from the heat dissipation groove (2d) to the corresponding circular-arc groove (1a).

2. The motor stator lamination of claim 1, wherein, The heat dissipation groove (2d) comprises two oppositely arranged inclined walls (2d1), and each inclined wall (2d1) is axially penetrated by a notch groove (2d2).

3. The motor stator lamination of claim 2, wherein, The cross section of the notch groove (2d2) is circular arc-shaped.

4. The motor stator lamination of claim 1, wherein, The two end faces of the circular-arc groove (1a) are circular arc-shaped.

5. The motor stator lamination of claim 1, wherein, The body (1) is axially penetrated by guide holes (4), and the guide holes (4) are at least two and are circumferentially distributed on the body (1), and the guide holes (4) and the circular-arc groove (1a) are circumferentially distributed on the body (1).

6. The motor stator lamination of claim 5, wherein, The type of the guide hole (4) is a circular hole.

7. The motor stator lamination of claim 1, wherein, The body (1) is axially penetrated by a plurality of welding grooves (5) on the outer side wall, and the axial section of the welding groove (5) is generally "W"-shaped.

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