Stator core, motor and automobile

Abstract

The utility model belongs to the technical field of motors, and discloses a stator core, a motor and an automobile. The stator core comprises a plurality of first punching sheets and a plurality of second punching sheets, the plurality of first punching sheets are stacked, the first punching sheets are provided with open slots to form a plurality of first stator teeth, the plurality of second punching sheets are arranged at two ends of the plurality of first punching sheets along the axis direction, and the second punching sheets are provided with closed slots to form a plurality of second stator teeth which are mutually connected. According to the utility model, on the premise of ensuring the electromagnetic performance of the stator core, the second punching sheets with the closed slots at the end parts eliminate the problem of warped sheet deformation, the warped sheet deformation does not occur even when the magnitude of interference is large, the risk of motor failure caused by the warped sheet deformation is reduced, and the production rejection rate of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator core, a motor and an automobile. Background Art

[0002] At present, in the power system adopted by new energy electric vehicles, the stator core used in the motor usually adopts a punching sheet with an open slot structure. The stator core composed of punching sheets with an open slot structure can provide better electromagnetic performance. In the prior art, the stator of the motor is usually connected with the machine shell (frame) by interference fit. When a large torque needs to be output, the interference amount needs to be increased, thereby increasing the risk of warping and deformation of the punching sheet with an open slot structure. If the copper wire is scratched after warping, it will cause accidents such as motor burnout, resulting in property losses. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a stator core, a motor and an automobile to solve the problem that the punching sheet structure of the stator core is insufficient in strength and prone to warping and deformation.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A stator core, comprising:

[0006] A plurality of first punching sheets, the plurality of first punching sheets are stacked, and the first punching sheet is provided with an open slot to form a first stator tooth;

[0007] A plurality of second punching sheets, the plurality of second punching sheets are arranged at both ends of the plurality of first punching sheets along their axial directions, the second punching sheet is provided with a closed slot to form a plurality of interconnected second stator teeth, and the plurality of open slots and the plurality of closed slots are arranged in one-to-one correspondence and communication.

[0008] In some embodiments, there are two second punching sheets, and the two second punching sheets are respectively arranged at both ends of the plurality of first punching sheets.

[0009] In some embodiments, for the second punching sheets at both ends of the plurality of first punching sheets, the number of the second punching sheets provided at each end does not exceed 5, and the plurality of second punching sheets at the same end are stacked.

[0010] In some embodiments, both the first punching sheet and the second punching sheet are silicon steel sheets.

[0011] In some embodiments, the two stator teeth on both sides of the closed slot are connected by an arc transition.

[0012] In some embodiments, one ends of the plurality of first stator teeth and the plurality of second stator teeth facing the central hole have the same structure.

[0013] The motor includes the stator core provided by the present utility model.

[0014] The vehicle includes the motor provided by the present utility model.

[0015] Advantages of the present utility model:

[0016] The stator core provided by the present utility model includes a plurality of first punching sheets and a plurality of second punching sheets. The plurality of first punching sheets are stacked, and the first punching sheet is provided with an open slot to form a plurality of first stator teeth; the plurality of second punching sheets are arranged at both ends of the plurality of first punching sheets along their axial direction, and the second punching sheet is provided with a closed slot to form interconnected second stator teeth. Compared with the prior art in which only a punching sheet stacking structure with an open slot or a closed slot is used, on the premise of ensuring the electromagnetic performance of the stator core, the second punching sheet with a closed slot at the end of the stator core eliminates the problem of warping deformation of the punching sheet, and warping deformation will not occur even when the interference amount is large, thereby reducing the risk of motor failure caused by warping deformation and reducing the production scrap rate of the motor. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the stator core provided by an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 the enlarged structural diagram of area A in

[0019] Figure 3 is a disassembled structural diagram of the stator core provided by an embodiment of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the second punching sheet in the stator core provided by an embodiment of the present utility model;

[0021] Figure 5 is Figure 4 the enlarged structural diagram of area B in

[0022] Figure 6 is a schematic structural diagram of the first punching sheet in the stator core provided by an embodiment of the present utility model;

[0023] Figure 7 is Figure 6 the enlarged structural diagram of area C in

[0024] In the figure:

[0025] 1. First punching sheet; 11. Open slot; 12. First stator tooth;

[0026] 2. Second punching sheet; 21. Closed slot; 22. Second stator tooth. Detailed implementation manners

[0027] The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0028] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0030] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0031] An embodiment of the present utility model provides a stator core, as Figures 1-7 , the stator core includes a plurality of first punching sheets 1 and a plurality of second punching sheets 2. The plurality of first punching sheets 1 are stacked, and the first punching sheet 1 is provided with an opening slot 11 to form a plurality of first stator teeth 12; the plurality of second punching sheets 2 are arranged at both ends of the plurality of first punching sheets 1 along their axial directions, the second punching sheet 2 is provided with a closed slot 21 to form a plurality of interconnected second stator teeth 22, and the plurality of opening slots 11 and the plurality of closed slots 21 are arranged in one-to-one correspondence and communication.

[0032] The stator core provided by the utility model comprises a plurality of first punching sheets 1 and a plurality of second punching sheets 2. The plurality of first punching sheets 1 are stacked. The first punching sheet 1 is provided with an opening groove 11 to form a plurality of first stator teeth 12. The first punching sheet 1 with the opening groove 11 structure is conducive to obtaining a stator core with excellent electromagnetic performance. However, since the plurality of first stator teeth 12 are independent of each other at the opening end of the opening groove 11, the structural strength of the end of the first stator tooth 12 facing the central hole of the stator core is insufficient, which is not conducive to stacking. Especially when the interference amount is large, warping and deformation are likely to occur, affecting the safe use of the stator core and the motor. To solve the above technical problems, in this embodiment, second punching sheets 2 are respectively arranged at both ends of the plurality of first punching sheets 1, as Figure 3 shown. The plurality of second punching sheets 2 are arranged at both ends of the plurality of first punching sheets 1 along their axial direction (stacking direction). The second punching sheet 2 is provided with a closed groove 21 to form a plurality of interconnected second stator teeth 22. Compared with the prior art in which only punching sheet stacking structures with opening grooves 11 or closed grooves 21 are used, the utility model eliminates the problem of warping and deformation at the end by arranging the second punching sheet 2 with a closed groove 21 at the end on the premise of ensuring the electromagnetic performance of the stator core, and obvious warping and deformation will not occur even when the interference amount is large.

[0033] In some embodiments, there are two second punching sheets 2, and the two second punching sheets 2 are respectively arranged at both ends of the plurality of first punching sheets 1.

[0034] As Figure 3 shown in this embodiment, both the second punching sheet 2 and the first punching sheet 1 are made of the same silicon steel sheet material. Without changing other structures of the existing stator core, the two second punching sheets 2 are respectively arranged at both ends of the plurality of first punching sheets 1 and stacked together with the first punching sheets 1 to form a stator core. On the premise of not reducing other performances, the problem of warping and deformation easily occurring at both ends of the stator core is eliminated, and further the problem of motor failure caused by warping is reduced.

[0035] In some embodiments, for the second punching sheets 2 at both ends of the plurality of first punching sheets 1, the number of second punching sheets 2 provided at each end does not exceed five, and the plurality of second punching sheets 2 at the same end are stacked.

[0036] To ensure the electromagnetic performance of the stator core, the number of second punching sheets 2 cannot be too many. According to the experimental results, the number of second punching sheets 2 at both ends of the first punching sheet 1 can be different, but according to the thickness of the existing silicon steel sheet, the number of second punching sheets 2 cannot exceed five, that is, ten second punching sheets 2 can be divided into two groups and arranged at both ends of the first punching sheet 1. In a preferred solution, 1-3 second punching sheets 2 are respectively arranged at both ends of the first punching sheet 1, which is the best for increasing the anti-deformation ability of the stator core on the premise of ensuring the electromagnetic performance.

[0037] In some embodiments, both the first punching sheet 1 and the second punching sheet 2 are silicon steel sheets.

[0038] In some embodiments, the two second stator teeth 22 on both sides of the closed slot 21 are connected by an arc transition.

[0039] As Figure 5 shown, for the structure of the closed slot 21 on the second punching sheet 2, the end facing the central hole of the stator core is an arc-shaped slot bottom surface. Compared with the structure of the open slot 11 on the first punching sheet 1, except for the opening of the open slot 11, the slot structures in other places are the same, so as to obtain a consistent structure, that is, the tooth ends of the plurality of first stator teeth 12 and the plurality of second stator teeth 22 facing the central hole of the stator have the same structure.

[0040] As Figures 5-7 shown, the closed slot 21 can also be understood as being formed by sealing the open slot 11. The bottom of the closed slot 21 realizes the connection of two adjacent first stator teeth 12, and thus has greater structural strength, and it is not easy to have an accident of single tooth warping and deformation. Therefore, the failure risk of the motor caused by warping and deformation is reduced, which is beneficial to reducing the production scrap rate of the motor.

[0041] The embodiment of the present utility model also provides a motor. The stator core provided by the embodiment of the present utility model is used on the motor. By adopting the stator core provided by the present utility model, the stator and rotor of the motor can work under a greater torque.

[0042] The embodiment of the present utility model also provides an automobile, including the motor provided by the present utility model. The motor adopts the stator core provided by the present utility model, which is beneficial to improving the output torque of the motor and the service performance.

[0043] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, rather than limiting the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. Stator core, characterized in that, Comprising: A plurality of first punching sheets (1), the plurality of first punching sheets (1) being stacked, and the first punching sheet (1) being provided with an opening groove (11) to form a first stator tooth (12); A plurality of second punching sheets (2), the plurality of second punching sheets (2) being arranged at both ends of the plurality of first punching sheets (1) along their axial directions, the second punching sheet (2) being provided with a closed groove (21) to form a plurality of interconnected second stator teeth (22), and the plurality of opening grooves (11) and the plurality of closed grooves (21) being in one-to-one correspondence and communication arrangement.

2. The stator core according to claim 1, characterized in that, There are two of the second punching sheets (2), and the two second punching sheets (2) are respectively arranged at both ends of the plurality of first punching sheets (1).

3. The stator core according to claim 1, wherein, For the second punching sheets (2) at both ends of the plurality of first punching sheets (1), the number of the second punching sheets (2) provided at each end does not exceed 5, and the plurality of second punching sheets (2) at the same end are stacked.

4. The stator core according to claim 1, wherein, Both the first punching sheet (1) and the second punching sheet (2) are silicon steel sheets.

5. The stator core according to claim 1, characterized in that The two second stator teeth (22) on both sides of the closed groove (21) are connected by an arc transition.

6. The stator core according to claim 1, characterized in that, One ends of the plurality of first stator teeth (12) and the plurality of second stator teeth (22) facing the central hole of the stator core have the same structure.

7. Electric motor, characterized in that, Comprising the stator core according to any one of claims 1-6.

8. An automobile, characterized in that, Comprising the motor according to claim 7.

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