Laminated structure of rotor iron core, motor iron core and production equipment of motor iron core

Abstract

The utility model discloses a laminated structure of a rotor iron core, a motor iron core and production equipment thereof, and the laminated structure of the rotor iron core comprises a plurality of iron core sheets which are rotated and laminated to form a chute, the surface of each iron core sheet is provided with a plurality of buckling points which are distributed along the same circumference, and the two end parts of each buckling point are provided with abdicating holes; wherein the two adjacent iron core sheets are mutually fixed through the buckling points, and the receding holes can provide assembling gaps for the two mutually matched buckling points when the iron core sheets are rotationally stacked. According to the utility model, the problem of extrusion springback between adjacent buckling points when iron core sheets are stacked in a skew state is effectively solved, the consistency and accuracy of skew angles are ensured, the stability of production quality is facilitated, the production efficiency is improved, the structure is simple, and the production difficulty is low.

Description

Technical Field

[0001] This utility model relates to the field of motor core manufacturing technology, specifically to a stacked structure of a rotor core, a motor core and its production equipment. Background Technology

[0002] In asynchronous motors for new energy vehicles, the rotor core is designed with skewed slots, meaning the core has a specific angle so that the rotor bars and air gap are at a certain oblique angle. This design allows the air gap magnetic field to be distributed along the oblique direction of the bars, rather than in the traditional vertical distribution, thereby reducing the magnetic reluctance between the rotor and the air gap and improving the motor's efficiency and torque. The following are existing skewed stacking methods:

[0003] 1. Traditional slanted die method: The loose pieces are stamped by the die and then stacked and welded outside the die to form a shape. This slanted stacking method is very reliable, but it requires sheet sorting and welding, resulting in low production efficiency and high cost.

[0004] 2. Automatic stacking and riveting method for mold fasteners: Each piece of metal is rotated at an angle and stacked, then fixed with fasteners between adjacent metal pieces. While this method improves automation, in actual manufacturing processes, for example... Figure 1 As shown, interference occurs between the clamping points of adjacent iron chips, causing random fluctuations in the skew angle and resulting in unstable manufacturing quality.

[0005] Therefore, it is necessary to provide a new approach to solve the aforementioned technical problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a stacked structure for rotor cores that solves the problem of compression and springback between adjacent snap points when stacking cores in a skewed state. This ensures the consistency and accuracy of the skew angle, which is beneficial to the stability of production quality, improves production efficiency, and has a simple structure with low production difficulty.

[0007] The technical solution of this utility model is summarized as follows:

[0008] A stacked structure for a rotor core, comprising:

[0009] Several iron chips are rotated and stacked to form inclined grooves. Each iron chip has several fastening points distributed along the same circumference on its surface. Each fastening point has a clearance hole at both ends.

[0010] The two adjacent iron chips are fixed to each other by fastening points, and the clearance hole can provide an assembly gap for the two fastening points to cooperate when the iron chips are rotated and stacked.

[0011] Preferably, the clearance hole is circular, elliptical, rectangular, or polygonal.

[0012] Preferably, the clearance hole is a circular hole, and the diameter of the circular hole is greater than or equal to the width of the buckle point.

[0013] Preferably, the diameter of the circular hole is 1-3 mm.

[0014] Preferably, the iron chip has at least 12 buckle points.

[0015] Preferably, the thickness of the iron chip is 0.25-0.5 mm.

[0016] Preferably, each of the iron chips has a plurality of rotor slots formed on its outer periphery, and the corresponding rotor slots on two adjacent stacked iron chips are offset at a certain angle in the circumferential direction to form oblique slots.

[0017] Preferably, the offset angle of the corresponding rotor slots on the iron chips at both ends is 5-8°.

[0018] This utility model also provides a motor core, including the stacked structure of the rotor core as described above.

[0019] This utility model also provides a motor core production equipment for producing motor cores as described above.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This utility model provides a stacked structure for rotor cores. By adding clearance holes at both ends of the snap points, it solves the problem of squeezing and springing between adjacent snap points when stacking the cores in a skewed state. This ensures the consistency and accuracy of the skew angle, which is beneficial to the stability of production quality and improves production efficiency. Moreover, the structure is simple and easy to produce.

[0022] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram illustrating the interference that occurs between the clamping points of adjacent iron chips in the prior art;

[0025] Figure 2This is a schematic diagram of the stacked structure of the rotor core in Embodiment 1 of this utility model;

[0026] Figure 3 This is a schematic diagram of the rotor core structure in Embodiment 1 of this utility model;

[0027] Figure 4 This is a schematic diagram of the arrangement of clearance holes on the iron chip in Embodiment 1 of this utility model;

[0028] Figure 5 for Figure 4 Enlarged view of point C.

[0029] In the diagram: 1. Rotor core;

[0030] 10. Iron chip; 101. Iron chip at end A; 1011. Iron clip at end A; 102. Iron chip at end B; 1021. Iron clip at end B; 11. Clip; 12. Relief hole; 121. First relief hole; 122. Second relief hole; 13. Rotor slot; 20. Inclined slot; 30. Positioning slot. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] In the accompanying drawings, shapes and dimensions may be enlarged for clarity, and the same reference numerals will be used in all figures to indicate the same or similar parts.

[0033] In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, and lower are defined relative to the structure shown in the accompanying drawings. In particular, "height" corresponds to the dimension from top to bottom, "width" corresponds to the dimension from left to right, and "depth" corresponds to the dimension from front to back. These are relative concepts and may vary depending on their location and usage. Therefore, these or other orientations should not be interpreted as restrictive terms.

[0034] Terms involving attachment, connection, etc. (e.g., “connection” and “attachment”) refer to the relationship in which these structures are directly or indirectly fixed or attached to each other through an intermediate structure, as well as movable or rigid attachments or relationships, unless otherwise explicitly stated.

[0035] Example 1

[0036] This utility model embodiment provides a stacked structure for a rotor core 1, combined with... Figures 2-5 As shown, it includes:

[0037] Several iron chips 10 are formed by rotating and stacking to form inclined grooves 20. Each iron chip 10 has several fastening points 11 distributed along the same circumference on its surface. Each fastening point 11 has a clearance hole 12 at both ends.

[0038] The two adjacent iron chips 10 are fixed to each other by fastening points 11, and the clearance hole 12 can provide an assembly gap for the two fastening points 11 that cooperate with each other when the iron chips 10 are rotated and stacked.

[0039] Specifically, when the iron chips 10 are stacked clockwise to the left, the first clearance hole 121 located to the right of the latching point 11 provides a gap between the two mating latching points 11 to avoid interference; when the iron chips 10 are stacked counterclockwise to the right, the second clearance hole 122 located to the left of the latching point 11 provides a gap between the two mating latching points 11 to avoid interference; for example, when several iron chips 10 are rotated and stacked, such as Figure 3 Iron chip 101 at end A and iron chip 102 at end B form the two ends of rotor core 1. Then, the A-clamping point 1011 and the B-clamping point 1021 will interact as follows: Figure 4 The relative offset is shown in the figure.

[0040] In this embodiment, by adding clearance holes 12 at both ends of the locking point 11, the problem of misalignment between adjacent locking points 11 during the stacking of iron chips 10 in a skewed state is solved. Figure 1 The problem of extrusion and springback shown is addressed by ensuring the consistency and accuracy of the torsion angle, which is beneficial to the stability of production quality, improves production efficiency, and has a simple structure and low production difficulty.

[0041] In some embodiments, the clearance hole 12 is in the shape of a circle, ellipse, rectangle, or polygon.

[0042] In some preferred embodiments, the clearance hole 12 is a round hole.

[0043] Furthermore, the diameter of the circular hole is greater than or equal to the width of the buckle point 11.

[0044] Furthermore, the diameter of the circular hole is 1-3 mm.

[0045] In some preferred embodiments, the diameter D of the circular hole is equal to twice the width h of the fastening point 11, i.e., D = 2h. Preferably, the diameter D of the clearance hole 12 is 2 mm, and the width h of the fastening point 11 is 1 mm.

[0046] In some embodiments, the iron chip 10 is provided with at least 12 fastening points 11. In this embodiment, each iron chip 10 is provided with 12 fastening points 11.

[0047] Furthermore, the thickness of the iron chip 10 is 0.25-0.5 mm. Wherein, as... Figure 2 As shown, the distance by which the buckle point 11 protrudes from the surface of the iron chip 10 is greater than the thickness of the iron chip 10.

[0048] Furthermore, the height of the rotor core 1 is 80-100mm.

[0049] In some embodiments, each of the iron chips 10 has a plurality of rotor slots 13 formed on its outer peripheral edge, and the corresponding rotor slots 13 on two adjacent stacked iron chips 10 are offset by a certain angle in the circumferential direction to form oblique slots 20.

[0050] Furthermore, such as Figure 5 As shown, the offset angle of the corresponding rotor slots 13 on the iron chips 10 at both ends is 5-8°. For example, in this embodiment, the iron chip 101 at end A and the iron chip 102 at end B are located at both ends of the rotor core 1. After stacking, an offset angle α is formed between the rotor slot 13 on end A and the corresponding rotor slot 13 on end B. Preferably, the offset angle α is 6.33°±0.5°.

[0051] In some embodiments, the sidewall of the rotor core 1 is formed with a positioning groove 30 structure to form a positioning structure for the stacked position of the iron chip 10.

[0052] Example 2

[0053] This utility model embodiment also provides a motor core, including a stacked structure of rotor core 1 as described in Embodiment 1. In this embodiment, by adding clearance holes 12 at both ends of the locking points 11, specifically, when the iron chip 10 is stacked clockwise to the left, the first clearance hole 121 on the right side of the locking point 11 provides a gap for the two mating locking points 11 to avoid interference; when the iron chip 10 is stacked counterclockwise to the right, the second clearance hole 122 on the left side of the locking point 11 provides a gap for the two mating locking points 11 to avoid interference. This solves the problem of squeezing and springback between adjacent locking points 11 when the iron chip 10 is stacked in a skewed state, ensuring the consistency and accuracy of the skew angle, which is beneficial to the stability of production quality, improves production efficiency, and has a simple structure and low production difficulty.

[0054] Example 3

[0055] This utility model embodiment also provides a motor core production equipment for producing motor cores as described in Embodiment 2. By adding clearance holes 12 at both ends of the snap points 11, the problem of extrusion and springback between adjacent snap points 11 when the iron chip 10 is stacked in a skewed state is solved, ensuring the consistency and accuracy of the skew angle, which is beneficial to the stability of production quality, improves production efficiency, and has a simple structure and low production difficulty.

[0056] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A stacked structure for a rotor core, characterized in that, include: Several iron chips are rotated and stacked to form inclined grooves. Each iron chip has several fastening points distributed along the same circumference on its surface. Each fastening point has a clearance hole at both ends. The two adjacent iron chips are fixed to each other by fastening points, and the clearance hole can provide an assembly gap for the two fastening points to cooperate when the iron chips are rotated and stacked.

2. The laminated structure of the rotor core as described in claim 1, characterized in that: The clearance hole is circular, elliptical, rectangular, or polygonal.

3. The laminated structure of the rotor core as described in claim 2, characterized in that: The clearance hole is a round hole, and the diameter of the round hole is greater than or equal to the width of the buckle point.

4. The laminated structure of the rotor core as described in claim 3, characterized in that: The diameter of the circular hole is 1-3 mm.

5. The laminated structure of the rotor core as described in claim 1, characterized in that: The iron chip is provided with at least 12 buckle points.

6. The laminated structure of the rotor core as described in claim 1, characterized in that: The thickness of the iron chip is 0.25-0.5 mm.

7. The laminated structure of the rotor core as described in claim 1, characterized in that: Each of the iron chips has a number of rotor slots formed on its outer periphery. The corresponding rotor slots on two adjacent stacked iron chips are offset at a certain angle in the circumferential direction to form oblique slots.

8. The laminated structure of the rotor core as described in claim 7, characterized in that: The offset angle of the corresponding rotor slots on the iron chips at both ends is 5-8°.

9. A motor core, characterized in that, It includes the stacked structure of the rotor core as described in claim 1.

10. A motor core production equipment, characterized in that, Used to produce the motor core as described in claim 9.

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