Rotor core of motor, motor rotor and new energy driving motor
By setting iron core chips and pores at both ends of the motor rotor iron core, reserved the allowable variable volume, solving the problem of motor shafts caused by the axis shaft caused by the deformation of the axishole during the cast aluminum, and improved the performance and safety and stability of the motor. And optimize the manufacturing method.
Patent Information
- Application Number
- CN202420920189.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The shaft hole of the existing motor rotor core is deformed due to high temperature extrusion during the casting of aluminum, which causes the shaft to chew when the motor shaft enters the shaft, which may cause the motor to be short-circuit.
Design a motor rotor core with iron core sheets provided at both ends. A through hole is formed in the center of the sheet. The diameter of the through hole is larger than the diameter of the shaft hole. Allowable deformation is reserved to avoid deformation of the shaft hole caused by high-temperature extrusion.
It effectively solves the problem of shaft chewing when the motor shaft is inserted into the shaft, avoids scratches on the motor shaft, improves the performance, safety and stability of the motor, and at the same time optimizes the manufacturing method and improves production efficiency.
Smart Images
Figure CN222395500U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor core manufacturing, and in particular to a motor rotor core, a motor rotor and a new energy drive motor. Background Art
[0002] The rotor is a key component of the motor. In existing motor rotors, the motor shaft and the rotor core are generally connected by interference fit. The process of pressing the motor shaft into the rotor core includes: heating the rotor core to about 250°C to enlarge the shaft hole, and then easily inserting the motor shaft into the shaft hole to achieve the purpose of shaft insertion.
[0003] However, in the existing motor core manufacturing process, the axial holes on the two end faces of the rotor core are deformed due to high-temperature extrusion during aluminum casting, and the axial holes on the two end faces become smaller. As a result, when the end face part of the rotor core is heated to 250°C, the expanded axial holes still have a certain interference fit with the motor shaft, resulting in gnawing of the motor shaft when the motor shaft is inserted, scratching the motor shaft, and producing iron filings, which may cause the motor to short-circuit.
[0004] Therefore, it is necessary to provide a new method to solve the above technical problems. Utility Model Content
[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a rotor core of a motor, which effectively solves the problem of shaft gnawing when the motor shaft is inserted into the shaft, avoids scratches on the motor shaft, and improves the performance and safety and stability of the motor; and has low production difficulty, high production efficiency, and optimized production methods.
[0006] The technical solution of the utility model is summarized as follows:
[0007] A rotor core of a motor comprises: a rotor core body, wherein a shaft hole is formed at the center of the rotor core body;
[0008] The rotor core body is provided with at least one first core sheet at one end and at least one second core sheet at the other end; wherein,
[0009] A first through hole is formed at the center of the first core sheet; a second through hole is formed at the center of the second core sheet;
[0010] The first through hole, the second through hole and the shaft hole are located on the same axis;
[0011] The diameter D1 of the first through hole and the diameter D2 of the second through hole are greater than the diameter D3 of the shaft hole.
[0012] Preferably, the diameter D1 of the first through hole and / or the diameter D2 of the second through hole is greater than or equal to (D3+K), wherein K is greater than or equal to 0.3 mm.
[0013] Preferably, the diameter D1 of the first through hole is equal to the diameter D2 of the second through hole.
[0014] Preferably, the thickness of the first core sheet and / or the thickness of the second core sheet is 3 mm-5 mm.
[0015] Preferably, the thickness of the first core sheet is equal to the thickness of the second core sheet.
[0016] Preferably, the diameter D1 of the first through hole is equal to the diameter D2 of the second through hole, and the thickness of the first core sheet is equal to the thickness of the second core sheet.
[0017] Preferably, the rotor core body comprises a plurality of third core sheets stacked on each other, and the shaft hole is formed at the center of the third core sheets.
[0018] Preferably, one first core sheet and one second core sheet are respectively arranged at two ends of a plurality of mutually stacked third core sheets.
[0019] The second object of the utility model is to provide a motor rotor, comprising a motor shaft and the rotor core of the motor as described above.
[0020] The third object of the utility model is to provide a new energy drive motor, including the motor rotor as described above.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] The utility model provides a rotor core of a motor, wherein the first through hole of the first core sheet and the second through hole of the second core sheet are reserved for allowable deformation at both ends of the rotor core body during high-temperature extrusion, that is, when the rotor core body is cast in aluminum, the deformation at both ends of the rotor core body occurs at the first through hole of the first core sheet and the second through hole of the second core sheet. This design effectively solves the problem of shaft gnawing when the motor shaft is inserted into the shaft, avoids scratches on the motor shaft, and improves the performance and safety stability of the motor; and the production difficulty is low, the production efficiency is high, and the production method is optimized.
[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0025] Figure 1 This is a schematic diagram of the stacked structure of the rotor core body in Example 1 of the utility model;
[0026] Figure 2 This is a schematic diagram of the first through hole and the second through hole having the same diameter in Embodiment 1 of the present utility model;
[0027] Figure 3 This is a schematic diagram of the first iron core sheet and the second iron core sheet having equal thickness in Embodiment 1 of the present utility model;
[0028] Figure 4 This is a schematic diagram of the first through hole and the second through hole having the same diameter and the first iron core sheet and the second iron core sheet having the same thickness in Embodiment 1 of the present utility model;
[0029] Figure 5 It is a schematic diagram of the design of the first iron core sheet or the second iron core sheet in Embodiment 1 of the utility model;
[0030] Figure 6 This is a schematic diagram of the assembly of the motor shaft and the rotor core in Example 2 of the utility model.
[0031] In the figure:
[0032] 10. Rotor core body; 11. First core sheet; 111. First through hole; 12. Second core sheet; 121. Second through hole; 13. Third core sheet; 131. Shaft hole; 101. Buckle point; 102. Cast aluminum groove; 20. Motor shaft. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.
[0035] In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined relative to the structure shown in the drawings. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directions should not be interpreted as restrictive terms.
[0036] Terms related to attachment, coupling, and the like (eg, "connected" and "attached") refer to either a fixed or attached relationship between structures, either directly or indirectly, and either movable or rigid attachments or relationships, unless expressly stated otherwise, of the structures to one another through intermediate structures.
[0037] Example 1
[0038] The utility model provides a rotor core of a motor, combined with Figure 1-Figure 5 As shown, it comprises: a rotor core body 10, wherein an axial hole 131 is formed at the center of the rotor core body 10;
[0039] The rotor core body 10 is provided with at least one first core sheet 11 at one end and at least one second core sheet 12 at the other end;
[0040] A first through hole 111 is formed at the center of the first core sheet 11; a second through hole 121 is formed at the center of the second core sheet 12;
[0041] The first through hole 111, the second through hole 121 and the shaft hole 131 are located on the same axis;
[0042] The diameter D1 of the first through hole 111 and the diameter D2 of the second through hole 121 are greater than the diameter D3 of the shaft hole 131 .
[0043] In this embodiment, the first through hole 111 of the first core sheet 11 and the second through hole 121 of the second core sheet 12 are reserved for the allowable deformation at both ends of the rotor core body 10 during the high-temperature extrusion process, that is, when the rotor core body 10 is cast aluminum, the deformation at both ends of the rotor core body 10 occurs at the first through hole 111 of the first core sheet 11 and the second through hole 121 of the second core sheet 12. This design effectively solves the problem of shaft gnawing when the motor shaft 20 is inserted into the shaft, avoids scratches on the motor shaft 20, and improves the performance and safety stability of the motor; and the production difficulty is low, the production efficiency is high, and the production method is optimized.
[0044] In one embodiment, the diameter D1 of the first through hole 111 and / or the diameter D2 of the second through hole 121 is greater than or equal to (D3+K), wherein K is greater than or equal to 0.3 mm; specifically: in some embodiments, the diameter D1 of the first through hole 111 is greater than or equal to (D3+K); in some further embodiments, the diameter D2 of the second through hole 121 is greater than or equal to (D3+K).
[0045] In some preferred embodiments, Figure 2 As shown, the diameter D1 of the first through hole 111 is equal to the diameter D2 of the second through hole 121, that is, D1=D2; preferably, the diameter D1 of the first through hole 111 and the diameter D2 of the second through hole 121 are equal to D3+2mm, that is, D1=D2=D3+2mm.
[0046] In some embodiments, the thickness t1 of the first core sheet 11 and / or the thickness t2 of the second core sheet 12 is 3 mm-5 mm; specifically: in some embodiments, the thickness t1 of the first core sheet 11 is any thickness between 3 mm and 5 mm; in some other embodiments, the thickness t2 of the second core sheet 12 is any thickness between 3 mm and 5 mm.
[0047] In some preferred embodiments, Figure 3 As shown, the thickness t1 of the first core sheet 11 is equal to the thickness t2 of the second core sheet 12, that is, t1 = t2.
[0048] In some preferred embodiments, Figure 4 As shown, the diameter D1 of the first through hole 111 is equal to the diameter D2 of the second through hole 121, D1=D2, and the thickness t1 of the first core sheet 11 is equal to the thickness t2 of the second core sheet 12, t1=t2. In this embodiment, the diameter D1 of the first through hole 111 of the first core sheet 11 is 55 mm, the diameter D2 of the second through hole 121 of the second core sheet 12 is 55 mm, and the diameter D3 of the shaft hole 131 is 53 mm; the thickness t1 of the first core sheet 11 is 5 mm, and the thickness t2 of the second core sheet 12 is also 5 mm.
[0049] Furthermore, the first core sheet 11 and the second core sheet 12 can be set as the same core sheet, which can effectively simplify the production difficulty and improve the production efficiency.
[0050] In some embodiments, the rotor core body 10 includes a plurality of mutually stacked third core sheets 13, and the axial hole 131 is formed at the center position of the third core sheet 13; further, a first core sheet 11 and a second core sheet 12 are respectively arranged at both ends of the plurality of mutually stacked third core sheets 13; that is, the rotor core body 10 is a stacked body formed by stacking a plurality of mutually stacked third core sheets 13 and a first core sheet 11 and a second core sheet 12 respectively arranged at both ends of the plurality of mutually stacked third core sheets 13.
[0051] Furthermore, the first core sheet 11, the second core sheet 12 and the third core sheet 13 have the same shape and cast aluminum groove 102; that is, it can be understood that the structural difference between the first core sheet 11, the second core sheet 12 and the third core sheet 13 is only that the first core sheet 11 and the second core sheet 12 have a first through hole 111 and a second through hole 121 whose diameters are larger than the axial hole 131.
[0052] Furthermore, a plurality of buckle points 101 are formed on the surfaces of the first core sheet 11, the second core sheet 12 and the third core sheet 13 along the same circumference; the plurality of buckle points 101 are evenly distributed along the same circumference, and the adjacent two third core sheets 13 and the first core sheet 11 and the third core sheet 13, the second core sheet 12 and the third core sheet 13 are matched through the buckle points 101 to achieve stacking; specifically, the buckle points 101 are formed by protrusions on the surfaces of the first core sheet 11, the second core sheet 12 and the third core sheet 13, and grooves are defined on the opposite sides thereof; this stacking method has the advantages of strong connection and good stability; preferably, the number of buckle points 101 is at least four; in this embodiment, the number of buckle points 101 is 12.
[0053] It should be understood that in the present embodiment, the rotor core body 10 may also be provided with two or more first core sheets 11 and second core sheets 12; further, other core sheets may be added to both ends of the rotor core body 10 which already has the first core sheets 11 and the second core sheets 12, for example, covering the surface of the first core sheet 11 and / or the surface of the second core sheet 12, or for example, being arranged between the first core sheet 11 and the third core sheet 13 and / or between the second core sheet 12 and the third core sheet 13, wherein the center position of the other core sheets has a through hole with a diameter larger than the shaft hole 131.
[0054] Example 2
[0055] The utility model provides a motor rotor, combined with Figure 1-Figure 6 As shown, it includes a motor shaft 20 and a rotor core of the motor as described in Example 1.
[0056] Furthermore, the motor shaft 20 and the rotor core body 10 are interference fit, and the interference amount is 0.08-0.14 mm.
[0057] In this embodiment, the first through hole 111 of the first core sheet 11 and the second through hole 121 of the second core sheet 12 are reserved for the allowable deformation at both ends of the rotor core body 10 during the high-temperature extrusion process, that is, when the rotor core body 10 is cast aluminum, the deformation at both ends of the rotor core body 10 occurs at the first through hole 111 of the first core sheet 11 and the second through hole 121 of the second core sheet 12. This design effectively solves the problem of shaft gnawing when the motor shaft 20 is inserted into the shaft, avoids scratches on the motor shaft 20, and improves the performance and safety stability of the motor; and the production difficulty is low, the production efficiency is high, and the production method is optimized.
[0058] Example 3
[0059] An embodiment of the utility model provides a new energy drive motor, including the motor rotor as described in Example 2.
[0060] In this embodiment, the first through hole 111 of the first core sheet 11 and the second through hole 121 of the second core sheet 12 are reserved for the allowable deformation at both ends of the rotor core body 10 during the high-temperature extrusion process, that is, when the rotor core body 10 is cast aluminum, the deformation at both ends of the rotor core body 10 occurs at the first through hole 111 of the first core sheet 11 and the second through hole 121 of the second core sheet 12. This design effectively solves the problem of shaft gnawing when the motor shaft 20 is inserted into the shaft, avoids scratches on the motor shaft 20, and improves the performance and safety stability of the motor; and the production difficulty is low, the production efficiency is high, and the production method is optimized.
[0061] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described here.
Claims
1. A rotor core of a motor, comprising: The rotor core body has an axial hole formed at the center thereof; the characteristics are: The rotor core body is provided with at least one first core sheet at one end and at least one second core sheet at the other end; wherein, A first through hole is formed at the center of the first core sheet; a second through hole is formed at the center of the second core sheet; The first through hole, the second through hole and the shaft hole are located on the same axis; The diameter D1 of the first through hole and the diameter D2 of the second through hole are greater than the diameter D3 of the shaft hole.
2. The rotor core of the motor according to claim 1, characterized in that: The diameter D1 of the first through hole and / or the diameter D2 of the second through hole is greater than or equal to (D3+K), wherein K is greater than or equal to 0.3 mm.
3. The rotor core of the motor according to claim 2, characterized in that: The diameter D1 of the first through hole is equal to the diameter D2 of the second through hole.
4. The rotor core of the motor according to claim 1, characterized in that: The thickness of the first core sheet and / or the thickness of the second core sheet is 3 mm-5 mm.
5. The rotor core of the motor according to claim 4, characterized in that: The thickness of the first core sheet is equal to the thickness of the second core sheet.
6. The rotor core of the motor according to claim 1, characterized in that: The diameter D1 of the first through hole is equal to the diameter D2 of the second through hole, and the thickness of the first core sheet is equal to the thickness of the second core sheet.
7. The rotor core of the motor according to claim 1, characterized in that: The rotor core body includes a plurality of third core sheets stacked on each other, and the shaft hole is formed at the center of the third core sheets.
8. The rotor core of the motor according to claim 7, characterized in that: A first iron core sheet and a second iron core sheet are respectively arranged at two ends of a plurality of mutually stacked third iron core sheets.
9. A motor rotor, characterized in that: The invention comprises a motor shaft and a rotor core of the motor as claimed in claim 1.
10. A new energy drive motor, characterized in that: Comprising the motor rotor as claimed in claim 9.