Separating piece structure of laminated iron core of motor

Abstract

The utility model discloses a motor laminated iron core separator structure, which comprises a separator body, one end of a tooth-shaped fitting area in the length direction is connected with the separator body, two sides of the other end of the tooth-shaped fitting area in the length direction extend to form extension sections, and a convex block and a concave block are arranged in the separator body. The protruding blocks and the concave blocks are formed on the separating sheet body through stamping, the protruding blocks and the concave blocks are arranged in the annular attaching area around the center of the separating sheet body at intervals, the protruding blocks and the concave blocks are arranged in the tooth-shaped attaching area at intervals, and a separating notch is formed in the end of the extending section. The protrusions enable the stator punching sheets to be in a circular range, so that the bonding area between the stator punching sheets and the separation sheet bodies is reduced, subsequent separation of the separation sheet bodies by each stator punching sheet group at the position is facilitated, and the effect of assisting separation of the stator punching sheet groups is further achieved.

Description

Technical Field

[0001] The utility model relates to a laminated accessory of an electric motor, in particular to a laminated iron core separation sheet structure of an electric motor. Background Art

[0002] Stator blades, also known as stator laminations, are stamped from 0.3mm thick silicon steel sheets into various sizes to accommodate stators in motors of varying power. In motor applications, stator laminations made from silicon steel sheets are either cold-rolled or hot-rolled. Stator laminations are made from thin steel sheets with a very low carbon content and are produced under specially controlled conditions to achieve minimal hysteresis losses. Pure iron is generally unsuitable for use in alternating magnetic fields due to its low resistivity, which can lead to high eddy current losses. The addition of silicon increases resistivity by forming a solid solution alloy with iron.

[0003] In the prior art, such as Figure 1 As shown, this type of stator silicon steel sheet structure is usually adopted, in which uniformly distributed teeth are provided inside, and the ends of the teeth extend to form extension sections for winding. During the processing, in order to make the stator punchings overlap with each other, a glue layer is usually coated on the raw silicon steel sheet before the stator punchings leave the factory. When the punchings are superimposed on each other, the stator punchings are overlapped together by heating the hot melt glue layer and applying axial pressure. However, in order to avoid adhesion between adjacent groups of stator punchings in the height direction, a separation sheet is required to achieve separation between adjacent stator punchings in the height direction. Utility Model Content

[0004] The utility model aims to provide a motor laminated iron core separation sheet structure, which reduces the contact area by protruding on the surface, thereby assisting the separation of stator punching sheets.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a motor laminated iron core separation sheet structure, including a separation sheet body, a through hole is provided on the side of the separation sheet body close to the center, and the side of the separation sheet body away from the center is an annular bonding area, and the separation sheet body is provided with a tooth-shaped bonding area corresponding to the tooth portion around the through hole in the horizontal direction, one end of the tooth-shaped bonding area in the length direction is connected to the separation sheet body, and both sides of the other end of the tooth-shaped bonding area in the length direction extend to form an extension section, and protrusions and concave blocks are provided in the separation sheet body, and the protrusions and concave blocks are formed on the separation sheet body by stamping, and the protrusions and concave blocks are spaced around the center of the separation sheet body in the annular bonding area, and the protrusions and concave blocks are spaced in the tooth-shaped bonding area, and the end of the extension section is provided with a separation notch.

[0006] Preferably, the convex block protrudes from the surface of the separation sheet on one side of the separation sheet, and the convex block is recessed in the surface of the separation sheet on the other side of the separation sheet. The concave block is recessed in the surface of the separation sheet on one side of the separation sheet, and the concave block protrudes from the surface of the separation sheet on the other side of the separation sheet.

[0007] By adopting the above technical solution, that is, the convex blocks and the concave blocks protrude from the surfaces on both sides of the separation sheet body respectively, the contact between the position and the surrounding positions and the stator punching sheet is reduced.

[0008] Preferably, the outer contour shape of the convex block and the outer contour shape of the concave block are arranged in a mirror-symmetrical manner with the separation sheet as the center.

[0009] By adopting the above technical solution, the production cost of the stamping die at this position is reduced.

[0010] Preferably, the cross-sectional shapes of the protrusions and recesses are both circular, and the longitudinal cross-sectional profiles of the protrusions and recesses include a first inclined section, a horizontal section and a second inclined section in sequence, one end of the first inclined section is connected to the separation sheet, the other end of the first inclined section is inclined upward and connected to one end of the horizontal section, the other end of the horizontal section is connected to one end of the second inclined section, and the other end of the second inclined section is inclined downward and connected to the separation sheet.

[0011] By adopting the above technical solution, that is, the side surfaces of the convex blocks and the concave blocks are excessively inclined, it is avoided that the silicon steel sheet is broken at the positions of the convex blocks and the concave blocks during stamping.

[0012] Preferably, both ends of the first inclined section and both ends of the second inclined section are arc-shaped transitions, and the horizontal section protrudes from the separation sheet by 0.2-1 mm.

[0013] By adopting the above technical solution, the arc transition reduces the indentation between the separator and the stator punching sheet during the lamination and pressing process.

[0014] Preferably, the horizontal section is inwardly recessed to form a protrusion, and the protrusion protrudes in the opposite direction from the lower surface of the separation sheet. The cross-section of the protrusion is circular, and the longitudinal section of the protrusion is spherical.

[0015] By adopting the above technical solution, the reverse protrusions strengthen the structural strength of the convex block and the concave block, thereby preventing the horizontal section from being pressed to overlap the separated sheet during the pressing process.

[0016] Preferably, the outer circumferential side surface of the separation sheet body extends outward to form a first flange, the first flange protrudes from the outer circumferential side surface of the separation sheet body by 0.2 mm, and there is an arc-shaped transition between the first flange and the separation sheet body.

[0017] By adopting the above technical solution, the first flange provides a force application point in the height direction when removing the separated sheet body, and at the same time protects the stator punching sheet in the height direction during the stacking and hot pressing process.

[0018] Preferably, the cross-section of the separation notch is semicircular or triangular, and the extension section is tilted and folded upward at the separation notch to form a second flange.

[0019] By adopting the above technical solution, the contact area between the separation sheet body at the separation notch position and the stator punching sheet below the extension section is reduced, making it easier for the stator punching sheet to separate from the separation sheet body.

[0020] Preferably, the separation sheet is made of silicon steel sheet, and the number of the tooth-shaped contact areas is 8, 9, 12, 15, 17 or 18.

[0021] To sum up, during the working process, the separation sheet body is superimposed between each adjacent group of stator punching sheets in the height direction. During the heating process, the protrusions and concave blocks are raised or recessed on the surface of the separation sheet body. Each protrusion reduces the bonding area between the stator punching sheet and the separation sheet body within a circular range, making it convenient for each subsequent stator punching sheet group to separate the separation sheet body at this position, thereby playing a role in assisting the separation of the stator punching sheet group. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the structure of the stator punching sheet in the background technology;

[0023] Figure 2 is a schematic structural diagram of the separation sheet in Example 1;

[0024] Figure 3 yes Figure 2 An enlarged schematic diagram of part A is shown;

[0025] Figure 4 Schematic diagram of the stacking state of the separation sheet and the stator punching sheet of Example 1;

[0026] Figure 5 is a partial cross-sectional schematic diagram of Example 2;

[0027] In the figure, 1. separation sheet; 11. through hole; 12. tooth-shaped fitting area; 13. first flange; 14. extension section; 15. separation notch; 16. second flange; 2. protrusion; 21. first inclined section; 22. horizontal section; 23. second inclined section; 24. protrusion; 3. concave block; 31. stator punching sheet. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings.

[0029] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0030] Example 1:

[0031] like Figures 2 to 4 As shown, a motor laminated iron core separator structure includes a separator body 1, a through hole 11 that matches the size of the rotor is provided on one side of the separator body 1 near the center, and an annular fitting area is provided on the side of the separator body 1 away from the center. The separator body 1 is provided with an integer number of tooth-shaped fitting areas 12 corresponding to the tooth portion in the horizontal direction around the through hole 11, and the number of tooth-shaped fitting areas 12 is 8 or 9 or 12 or 15 or 17 or 18. In Example 1, the number of tooth-shaped fitting areas 12 is 17, and one end of the tooth-shaped fitting area 12 in the length direction is connected to the separator body 1, and extension sections 14 are extended on both sides of the other end of the tooth-shaped fitting area in the length direction. A protrusion 2 and a concave block 3 are provided in the separator body 1, and the protrusion 2 and the concave block 3 are formed on the separator body 1 by stamping. The protrusion 2 and the concave block 3 are spaced around the center of the separator body 1 in the annular fitting area, and the protrusion 2 and the concave block 3 are spaced in the tooth-shaped fitting area 12.

[0032] like Figure 3 and Figure 4 As shown, in embodiment 1, the outer contour shape of the convex block 2 and the outer contour shape of the concave block 3 are arranged in a mirror-symmetrical manner with the separation sheet 1 as the center.

[0033] The convex block 2 protrudes from the surface of the separation sheet 1 on one side of the separation sheet 1, and the convex block 2 is recessed in the surface of the separation sheet 1 on the other side of the separation sheet 1. The concave block 3 is recessed in the surface of the separation sheet 1 on one side of the separation sheet 1, and the concave block 3 protrudes from the surface of the separation sheet 1 on the other side of the separation sheet 1.

[0034] like Figure 2 As shown, the top view of the protrusion 2 and the concave block 3 in the height direction are both circular, that is, the cross-sectional shapes of the protrusion 2 and the concave block 3 are both circular. In the height direction, the longitudinal cross-sectional profiles of the protrusion 2 and the concave block 3 include a first inclined section 21, a horizontal section 22 and a second inclined section 23 in sequence. One end of the first inclined section 21 is connected to the separation sheet 1, and the other end of the first inclined section 21 is inclined upward and connected to one end of the horizontal section 22, the other end of the horizontal section 22 is connected to one end of the second inclined section 23, and the other end of the second inclined section 23 is inclined downward and connected to the separation sheet 1; in order to facilitate stamping, both ends of the first inclined section 21 and both ends of the second inclined section 23 are arc-shaped transitions.

[0035] like Figure 3As shown, the separation sheet 1 is made of silicon steel sheet with a thickness of about 0.5 mm. In order to reduce the contact area between the separation sheet 1 and the stator punching sheet 31 below it, the horizontal section 22 protrudes from the surface of the separation sheet 1 by 0.2 mm to 1 mm in the height direction, so that the contact area between the separation sheet 1 and the stator punching sheet 31 is reduced around the position of the protrusion 2, which facilitates subsequent separation. At the same time, the concave block 3 is on the back of the separation sheet 1 and has the same function as the protrusion 2.

[0036] like Figure 3 As shown, a separation notch 15 is provided at the end of the extension section 14 of the separation sheet body 1. In order to avoid contact between the stator punching 31 and the separation sheet body 1 at this position, since the structure of the stator punching 31 at this position is relatively thin, once it sticks, it is easy to cause the material of the stator punching 31 to bend. The separation notch 15 reduces the contact area at this position and avoids excessive contact between the tip of the stator punching 31 and the separation sheet body 1; the cross-sectional shape of the separation notch 15 is semicircular or triangular. In Example 1, the cross-sectional shape of the separation notch 15 is semicircular, and the extension section 14 is tilted upward and folded at the position of the separation notch 15 to form a second flange 16.

[0037] Working principle:

[0038] During the work process, Figure 4 As shown, the separation sheet body 1 is superimposed between each adjacent group of stator punching sheets 31 in the height direction. During the heating process, the protrusions 2 and the concave blocks 3 are raised 24 or recessed on the surface of the separation sheet body 1. Each protrusion 24 reduces the bonding area between the stator punching sheet 31 and the separation sheet body 1 within a circular range. Similarly, the concave blocks 3 reduce the contact area on the back side of the separation sheet body 1, making it convenient for each subsequent group of stator punching sheets 31 to separate the separation sheet body 1 at this position.

[0039] Example 2:

[0040] The difference between Example 2 and Example 1 is that in Example 2, the convex block 2 and the concave block 3 are bent twice to strengthen the structural strength at this position to adapt to higher pressure. The specific structure is as follows: Figure 5 As shown, the horizontal section 22 is inwardly recessed to form a protrusion 24, which protrudes in the opposite direction from the lower surface of the separation sheet 1. The cross-section of the protrusion 24 is circular, and the longitudinal section of the protrusion 24 is spherical.

[0041] At the same time, in order to protect the outer circumferential side of the stator punching sheet 31, the outer circumferential side of the separation sheet body 1 extends outward to form a first flange 13. The first flange 13 protrudes from the outer circumferential side of the separation sheet body 1 by 0.2 mm. The first flange 13 and the separation sheet body 1 have an arc-shaped transition, which serves to cover the side of the separation sheet body 1.

Claims

1. A motor laminated core separation sheet structure, comprising a separation sheet body (1), characterized in that: A through hole (11) is provided on one side of the separation sheet (1) close to the center, and an annular bonding area is provided on the side of the separation sheet (1) away from the center. A tooth-shaped bonding area (12) corresponding to the tooth portion is provided on the separation sheet (1) in the horizontal direction around the through hole (11). One end of the tooth-shaped bonding area (12) in the length direction is connected to the separation sheet (1), and an extension section (14) is formed on both sides of the other end in the length direction of the tooth-shaped bonding area. A convex block (2) and a concave block (3) are provided in the separation sheet (1). The convex block (2) and the concave block (3) are formed on the separation sheet (1) by stamping. The convex block (2) and the concave block (3) are arranged at intervals around the center of the separation sheet (1) in the annular bonding area. The convex block (2) and the concave block (3) are arranged at intervals in the tooth-shaped bonding area (12). A separation notch (15) is provided at the end of the extension section (14).

2. The motor laminated core separation structure according to claim 1, characterized in that: The convex block (2) protrudes from the surface of the separation sheet (1) on one side of the separation sheet (1), and the convex block (2) is recessed in the surface of the separation sheet (1) on the other side of the separation sheet (1); the concave block (3) is recessed in the surface of the separation sheet (1) on one side of the separation sheet (1), and the concave block (3) protrudes from the surface of the separation sheet (1) on the other side of the separation sheet (1).

3. The motor laminated core splitter structure according to claim 2, wherein: The outer contour shape of the convex block (2) and the outer contour shape of the concave block (3) are arranged in a mirror-symmetrical manner with the separation sheet (1) as the center.

4. The motor laminated core splitter structure according to claim 3, wherein: The cross-sectional shapes of the protrusion (2) and the concave block (3) are both circular, and the longitudinal cross-sectional profiles of the protrusion (2) and the concave block (3) sequentially include a first inclined section (21), a horizontal section (22), and a second inclined section (23), one end of the first inclined section (21) is connected to the separation sheet (1), the other end of the first inclined section (21) is upwardly inclined and connected to one end of the horizontal section (22), the other end of the horizontal section (22) is connected to one end of the second inclined section (23), and the other end of the second inclined section (23) is downwardly inclined and connected to the separation sheet (1).

5. The motor laminated core splitter structure according to claim 4, characterized in that: Both ends of the first inclined section (21) and the second inclined section (23) are arc-shaped transitions, and the horizontal section (22) protrudes from the separation sheet (1) by 0.2-1 mm.

6. The motor laminated core splitter structure according to claim 5, characterized in that: The horizontal section (22) is inwardly recessed to form a protrusion (24), and the protrusion (24) protrudes in reverse from the lower surface of the separation sheet (1). The cross-sectional shape of the protrusion (24) is circular, and the longitudinal cross-sectional shape of the protrusion (24) is spherical.

7. The motor laminated core splitter structure according to claim 1, wherein: The outer circumferential side surface of the separation sheet body (1) extends outward to form a first flange (13), the first flange (13) protrudes from the outer circumferential side surface of the separation sheet body (1) by 0.2 mm, and an arc-shaped transition is formed between the first flange (13) and the separation sheet body (1).

8. The motor laminated core splitter structure according to claim 1, wherein: The cross-section of the separation notch (15) is semicircular or triangular, and the extension section (14) is tilted upward at the position of the separation notch (15) to form a second flange (16).

9. The motor laminated core splitter structure according to claim 8, characterized in that: The separation sheet body (1) is made of silicon steel sheet, and the number of the tooth-shaped contact areas (12) is 8, 9, 12, 15, 17 or 18.

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