Rotor core, motor comprising same and vehicle
By setting radially staggered buckle points on the rotor core, the problems of core offset and self-torsion during the motor stack injection molding process are solved, ensuring the stability of motor performance.
Patent Information
- Application Number
- CN202420808055.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-18
AI Technical Summary
During the stack injection molding process of the motor, the adjacent core is offset due to the action of the buckle point, causing the rotor core to twist, affecting the motor performance.
A rotor core is designed, in which multiple buckle points are provided on each core, and the distance between the buckle points at the corresponding positions of each adjacent two cores to the axis of the core is different, so as to stagger each other along the radial direction of the core to avoid overlapping the buckle points positions.
Through the radial staggered design of the buckle points, the offset and self-torsion problems of adjacent cores during the stack injection molding process are avoided, and the stability of the motor performance is ensured.
Smart Images
Figure CN222750213U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of motor rotor manufacturing, and in particular relates to a rotor iron core and a motor and a vehicle comprising the same. Background Art
[0002] The iron core of the motor is made up of multiple rotor punchings stacked together. In order to prevent the rotor punchings from shifting during the stacking process, multiple stamped buckle points are set on the rotor punchings to position the rotor punchings during the stacking process. However, during the whole stacking injection molding process of the iron core with buckle points, the buckle points will cause adjacent iron cores to shift, causing the rotor iron core to self-twist during the pressing and injection molding process, resulting in a situation that affects the performance of the motor. Utility Model Content
[0003] The utility model provides a rotor iron core and a motor and a vehicle comprising the same, so as to solve the problem of self-twisting of the rotor iron core caused by deviation between the iron cores during the whole stacking injection molding process.
[0004] In order to solve or improve the above technical problems to a certain extent, according to the utility model, a rotor core is provided, comprising: a plurality of cylindrical cores, wherein the plurality of cores are stacked in sequence;
[0005] A plurality of buckling points are arranged on each of the iron cores, and the buckling points at corresponding positions of every two adjacent iron cores have different distances from the axial center of the iron core so as to be staggered with each other along the radial direction of the iron core.
[0006] In some embodiments, there is a buckle point deformation influence area along the outer circumference of the buckle point, and the buckle point deformation influence areas at corresponding positions of every two adjacent cores are staggered with each other.
[0007] In some embodiments, the distances from the multiple buckling points of a single core to the axis of the core are the same, and the distances from the multiple buckling points of two adjacent cores to the axis of the core are different.
[0008] In some embodiments, the distances from the multiple buckling points of a single core to the axis of the core are the same, and the distances from the multiple buckling points of each core to the axis of the core are different.
[0009] In some embodiments, the distances from the plurality of buckling points of a single core to the axial center of the core include at least two types.
[0010] In some embodiments, the buckling points at corresponding positions of every two adjacent cores are staggered along the circumference of the core.
[0011] In some embodiments, each of the iron cores is provided with a plurality of groups of magnetic steel slots, the magnetic steel slots pass through the iron core, and at least one buckle point is provided between each two adjacent groups of magnetic steel slots.
[0012] In some embodiments, each buckle point of each core is arranged along a radial direction perpendicular to the core; or
[0013] Each of the buckling points of each of the iron cores is arranged to extend radially along the iron core; or
[0014] Each of the buckling points in a part of the iron cores is arranged along a radial direction perpendicular to the iron core, and each of the buckling points in another part of the buckling points is arranged along a radial direction of the iron core.
[0015] According to another aspect of the present invention, there is provided a motor, comprising the rotor core described in any one of the above embodiments.
[0016] According to another aspect of the present invention, a vehicle is provided, comprising the motor described in any one of the above embodiments.
[0017] The buckling points at corresponding positions of every two adjacent cores in the rotor core of the utility model are offset from each other in the radial direction of the core, so that the positions of the buckling points of adjacent cores do not overlap during the whole stacking injection molding process of the rotor core, avoiding the mutual influence of the buckling points at corresponding positions and solving the problem of skewness of the rotor core.
[0018] 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, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the exploded structure of the rotor core of one embodiment of the utility model;
[0020] Figure 2 This is a schematic structural diagram of an iron core according to an embodiment of the utility model;
[0021] Figure 3 A schematic structural diagram of an iron core according to another embodiment of the utility model;
[0022] Figure 4 This is a schematic structural diagram of an iron core according to another embodiment of the utility model;
[0023] Figure 5 It is a perspective structural schematic diagram of two adjacent iron cores of the rotor iron core of the utility model.
[0024]
Explanation of symbols
[0025] 1. Rotor core
[0026] 10. Iron core
[0027] 100. Deduction points
[0028] 101. Deformation influence area of buckle point
[0029] 20. Magnetic steel slot DETAILED DESCRIPTION
[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the following is a detailed description of the specific implementation and effects of a rotor core, a motor and a vehicle including the same proposed by the present invention, in combination with the accompanying drawings and preferred embodiments.
[0031] According to an embodiment of the utility model, a rotor core 1 is provided, such as Figure 1 As shown, the rotor core 1 includes a plurality of cylindrical cores 10, and the plurality of cores 10 are stacked in sequence. The core 10 is formed by stacking a plurality of rotor punchings. In order to prevent misalignment during the stacking of the rotor punchings, a plurality of positioning structures recessed toward one side are provided on the rotor punchings. After the stacking of the plurality of rotor punchings is completed, buckle points 100 are formed on the core 10.
[0032] like Figure 2 As shown, a plurality of buckle points 100 are formed on the iron core 10, and the buckle points 100 can be evenly arranged along the circumference of the iron core 10, or can be unevenly arranged along the circumference of the iron core 10. In one embodiment, the buckle points 100 are arranged in a rectangular structure, and the extension direction of the buckle points 100 of the rectangular structure can be set in the following manner:
[0033] Embodiment 1
[0034] like Figure 2 As shown, each buckle point 100 on each core 10 is arranged along a radial extension perpendicular to the core 10 , that is, the long side of the rectangular buckle point 100 is perpendicular to the radial direction of the core 10 , so as to better achieve the alignment of multiple rotor punchings in their radial direction.
[0035] Embodiment 2
[0036] Each buckle point 100 on each core 10 is arranged to extend radially of the core 10 , that is, the long side of the rectangular buckle point 100 is parallel to the radial direction of the core 10 , so as to better achieve the alignment of multiple rotor punchings in the circumferential direction thereof.
[0037] Embodiment 3
[0038] like Figure 3 As shown, among the multiple buckling points 100 of each core 10, each buckling point 100 in a part of the buckling points 100 is arranged along a radial extension perpendicular to the core 10, that is, the long side of the buckling point 100 of the rectangular structure is perpendicular to the radial direction of the core 10; each buckling point 100 in another part of the buckling points 100 is arranged along the radial extension of the core 10, that is, the long side of the buckling point 100 of the rectangular structure is parallel to the radial direction of the core 10, so as to achieve alignment of multiple rotor punchings in their radial and circumferential directions.
[0039] In order to ensure that the multiple cores 10 will not be twisted due to the influence of the buckle points 100 during the whole stacking injection molding process, the buckle points 100 of each two adjacent cores 10 in the multiple cores 10 of the rotor core 1 will not overlap. Specifically, at the corresponding positions of each two adjacent cores 10, the distances from the buckle points 100 of the two cores 10 to the axis of the core 10 are different, and then after the multiple cores 10 are stacked, the buckle points 100 at the corresponding positions of each two adjacent cores 10 are staggered along the radial direction of the core 10, such as Figure 5 shown.
[0040] It can be understood that the buckling points 100 at the corresponding positions of multiple adjacent cores 10 of the rotor core 1 can be staggered with each other, but as long as it includes the situation where the buckling points 100 at the corresponding positions of each two adjacent cores 10 are staggered with each other along the radial direction of the core 10, it should fall within the protection scope of the present utility model.
[0041] In one embodiment, among the multiple cores 10 of the rotor core 1, the distances from the multiple buckling points 100 of a single core 10 to the axis of the core 10 are the same, and the distances from the buckling points 100 of every two adjacent cores 10 to the axis of the core 10 are different. Specifically, among the two adjacent cores 10, the distance from the buckling point 100 of one core 10 to the axis of the core 10 is T1, and the distance from the buckling point 100 of the other core 10 to the axis of the core 10 is T2.
[0042] In this embodiment, the plurality of cores 10 may include at least two types of cores 10, for example, two, three, four, etc., and the distance between the buckle point 100 of each core 10 and the axis of the core 10 is different. In this embodiment, the number of types of cores 10 is not limited, as long as the types of two adjacent cores 10 are different.
[0043] In one embodiment, among the multiple cores 10 of the rotor core 1 , the distances from the multiple buckling points 100 of each core 10 to the axis of the core 10 are the same, and the distances from the buckling points 100 of each core 10 to the axis of the core 10 are different.
[0044] In this embodiment, the distance from the buckle point 100 of each core 10 to the axis of the core 10 is different, so that during the stacking process of multiple cores 10, multiple cores 10 can be stacked in any order, saving the process flow and improving assembly efficiency.
[0045] In one embodiment, among the multiple cores 10 of the rotor core 1, the distances between the multiple buckling points 100 on a single core 10 and the axis of the core 10 include at least two types, for example, two distances, three distances, or four distances. The buckling points 100 of multiple different distances can be arranged in any manner, as long as the buckling points 100 at corresponding positions of two adjacent cores 10 among the multiple cores 10 are staggered.
[0046] For example, the core 10 includes two kinds of deduction points 100 at different distances, and the two kinds of deduction points 100 at different distances are arranged in sequence at intervals, or two deduction points 100 at the same distance are spaced apart by a plurality of deduction points 100 at another distance.
[0047] During the stacking and injection molding of multiple cores 10, a mutual squeezing force will be generated between the cores 10. Under the action of this pressure, the buckle point 100 will be slightly deformed, and a buckle point deformation influence area 101 will be formed around the buckle point 100. Figure 4 In order to further ensure that the buckling points 100 between the iron cores 10 will not affect each other, the buckling point deformation influence areas 101 at corresponding positions of each two adjacent iron cores 10 in the plurality of iron cores 10 are staggered.
[0048] In one embodiment, among the multiple cores 10 of the rotor core 1 , the buckling points 100 at corresponding positions of every two adjacent cores 10 are staggered with each other along the radial direction of the cores 10 , and are also arranged to be staggered along the circumferential direction of the cores 10 .
[0049] In one embodiment, if Figure 5 As shown, the core 10 is also provided with multiple groups of magnetic steel slots 20, which penetrate the core 10 for inserting magnetic steel during assembly. At least one buckle point 100 is provided between each two adjacent groups of magnetic steel slots 20, so that multiple buckle points 100 are evenly distributed to improve the positioning effect of the rotor punching.
[0050] Another embodiment of the present invention provides a motor, which includes the rotor core 1 of any one of the above embodiments.
[0051] Furthermore, the motor also includes components such as a stator, a rotating shaft, and a housing to together constitute the motor.
[0052] Optionally, the motor is a permanent magnet synchronous motor.
[0053] Another embodiment of the present invention provides a vehicle, which includes the motor of any one of the above embodiments.
[0054] Optionally, the vehicle is a new energy vehicle, such as a pure electric vehicle, a hybrid vehicle, and an extended-range vehicle.
[0055] The buckling points at corresponding positions of every two adjacent cores in the rotor core of the utility model are offset from each other in the radial direction of the core, so that the positions of the buckling points of adjacent cores do not overlap during the whole stacking injection molding process of the rotor core, avoiding the mutual influence of the buckling points at corresponding positions and solving the problem of skewness of the rotor core.
[0056] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A rotor core, characterized in that: include: A plurality of cylindrical iron cores, wherein the plurality of the iron cores are stacked in sequence; A plurality of buckling points are arranged on each of the iron cores, and the buckling points at corresponding positions of every two adjacent iron cores have different distances from the axial center of the iron core so as to be staggered with each other along the radial direction of the iron core.
2. The rotor core according to claim 1, characterized in that: A buckle point deformation influence area is provided along the outer circumference of the buckle point, and the buckle point deformation influence areas at corresponding positions of every two adjacent iron cores are staggered with each other.
3. The rotor core according to claim 1 or 2, characterized in that: The distances from the multiple buckling points of a single core to the axis of the core are the same, and the distances from the multiple buckling points of two adjacent cores to the axis of the core are different.
4. The rotor core according to claim 1 or 2, characterized in that: The distances from the multiple buckling points of a single iron core to the axis of the iron core are the same, and the distances from the multiple buckling points of each iron core to the axis of the iron core are different.
5. The rotor core according to claim 1 or 2, characterized in that: The distances from the multiple buckling points of a single core to the axial center of the core include at least two types.
6. The rotor core according to claim 1 or 2, characterized in that: The buckling points at corresponding positions of every two adjacent iron cores are staggered along the circumferential direction of the iron core.
7. The rotor core according to claim 1, characterized in that: Each of the iron cores is provided with a plurality of groups of magnetic steel slots, the magnetic steel slots pass through the iron core, and at least one buckle point is provided between each two adjacent groups of magnetic steel slots.
8. The rotor core according to claim 1, characterized in that: Each of the buckling points of each of the iron cores is arranged along a radial direction perpendicular to the iron core; or Each buckle point of each iron core is arranged to extend along the radial direction of the iron core; or Each of the buckling points in a part of the iron cores is arranged along a radial direction perpendicular to the iron core, and each of the buckling points in another part of the buckling points is arranged along a radial direction of the iron core.
9. A motor, characterized in that: The invention comprises a rotor core as described in any one of claims 1 to 8.
10. A vehicle, characterized in that: The invention comprises the motor as claimed in claim 9.