Steel strip, rotor core, motor and vehicle

Abstract

The utility model provides a steel belt, a rotor core, a motor and a vehicle, the steel belt comprises a steel belt body, and the steel belt body extends along a first direction; a plurality of first buffer holes are formed in the first side of the steel belt body in the second direction, at least one elastic piece is arranged in each first buffer hole, and the two ends, in the first direction, of each elastic piece are connected with the steel belt body on the two sides of the corresponding first buffer hole correspondingly; wherein the first direction is perpendicular to the second direction. A plurality of first buffer holes are formed in the first side, in the second direction, of the steel belt body, at least one elastic piece is arranged in each first buffer hole, and the two ends, in the first direction, of each elastic piece are connected with the parts, on the two sides of the corresponding first buffer hole, of the steel belt body correspondingly; when the steel belt is wound towards the first side of the second direction, the first buffer hole and the elastic piece can release extrusion stress generated during winding, and the elastic piece can provide certain support, so that the risk of breakage of the steel belt is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle part manufacturing, in particular to a steel strip, a rotor core, a motor and a vehicle. BACKGROUND

[0002] With the development of science and technology, new energy vehicles are gradually favored by users. As a core component in new energy vehicles, the motor has a crucial influence on the vehicle. The motor generally includes a stator and a rotor arranged oppositely, and the rotor can rotate relative to the stator to convert electrical energy into mechanical energy. In the related technical scheme, the rotor core constituting the rotor is generally formed by winding and laminating a steel strip, and the side of the steel strip located radially inside the rotor core is extruded after winding, thereby easily causing the steel strip to break. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a steel strip, a rotor core, a motor and a vehicle, which are beneficial to release the stress of the wound steel strip and reduce the risk of steel strip breakage.

[0004] In one aspect, the present application provides a steel strip, comprising a steel strip body extending along a first direction; along a second direction, a first side of the steel strip body is provided with a plurality of first buffer holes, at least one elastic member is arranged in each first buffer hole, and both ends of the elastic member along the first direction are connected to the steel strip body on both sides of the first buffer hole; wherein the first direction and the second direction are perpendicular to each other.

[0005] In one possible implementation, the elastic member separates the first buffer hole into a plurality of first sub-buffer holes, and along the second direction, the hole diameter of the plurality of first sub-buffer holes gradually decreases from the first side of the steel strip body to the second side of the steel strip body.

[0006] In one possible implementation, the projection of the elastic member in the plane defined by the first direction and the second direction is in a wave shape or a zigzag shape.

[0007] In one possible implementation, the elastic member includes at least one wave crest or wave trough.

[0008] In one possible implementation, along the second direction, 1-2 elastic members are arranged in each first buffer hole.

[0009] In one possible implementation, the elastic member is integrally formed with the steel strip body.

[0010] In one possible implementation, along the second direction, the first side of the steel strip body is further provided with a plurality of second buffer holes, and the plurality of first buffer holes and the plurality of second buffer holes are alternately arranged along the first direction.

[0011] In a possible implementation, the second side of the steel strip body is further provided with a plurality of third buffer holes in the second direction.

[0012] In another aspect, the application provides a rotor core comprising the steel strip as described in any one of the above.

[0013] In a possible implementation, the rotor core is continuously wound by the same steel strip.

[0014] In another aspect, the application provides an electric machine comprising a rotor and a stator arranged oppositely, wherein the rotor comprises the rotor core as described in any one of the above.

[0015] In another aspect, the application provides a vehicle comprising the electric machine as described in the above.

[0016] The application provides a steel strip, a rotor core, an electric machine and a vehicle. The steel strip comprises a steel strip body extending in a first direction; a first side of the steel strip body is provided with a plurality of first buffer holes in a second direction, and at least one elastic member is arranged in each first buffer hole, and two ends of the elastic member in the first direction are connected to the steel strip body on both sides of the first buffer hole, respectively; and the first direction is perpendicular to the second direction. According to the application, the first side of the steel strip body in the second direction is provided with a plurality of first buffer holes, and at least one elastic member is arranged in each first buffer hole, and two ends of the elastic member in the first direction are connected to the steel strip body on both sides of the first buffer hole, respectively. When the steel strip is wound towards the first side in the second direction, the first buffer holes and the elastic members can release the extrusion stress generated during winding, and the elastic members can provide certain support to reduce the risk of breakage of the steel strip. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 A structural diagram of the steel strip provided by an embodiment of the application;

[0019] Figure 2 A structural diagram of the steel strip provided by an embodiment of the application; Figure 1 A local enlarged view of part A in the middle;

[0020] Figure 3 A use state diagram of the steel strip provided by an embodiment of the application;

[0021] Figure 4A structural diagram of a rotor core provided by an embodiment of the present application.

[0022] Reference signs:

[0023] 1 - rotor core

[0024] 10 - steel belt

[0025] 100 - steel belt body

[0026] 200 - first buffer hole; 210 - first sub-buffer hole

[0027] 300 - elastic member

[0028] 400 - second buffer hole

[0029] 500 - third buffer hole

[0030] X - first direction; Y - second direction; Z - third direction DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in a clear and complete manner with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0032] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] As described in the background, in the related art, during the process of winding the steel belt to form the rotor core, the side located radially inward of the rotor core is extruded, thereby easily causing the steel belt to break.

[0034] Therefore, the embodiments of the present application aim to provide a steel belt, a rotor core, a motor and a vehicle. A plurality of first buffer holes are arranged on a first side of the steel belt body along a second direction, and at least one elastic member is arranged in each first buffer hole. The two ends of the elastic member along a first direction are respectively connected to the steel belt body on both sides of the first buffer hole. When the steel belt is wound, the first buffer hole and the elastic member can release the extrusion stress generated during winding, and the elastic member can provide certain support to reduce the risk of the steel belt breaking.

[0035] The content of the embodiments of the present application will be described in detail below with reference to the drawings, so that those skilled in the art can understand the content of the present application in more detail. It should be noted that in the description of the embodiments of the present application, the first direction X, the second direction Y and the third direction Z are three different directions in a three-dimensional space, for example, the first direction X, the second direction Y and the third direction Z can be perpendicular to each other.

[0036] Figure 1 A structural diagram of a steel strip provided by an embodiment of the present application is provided. Figure 2 For Figure 1 A partial enlarged view of the A part in the middle; Figure 3 A use state diagram of the steel strip provided by an embodiment of the present application is provided.

[0037] Please refer to Figures 1-3 The present embodiment provides a steel strip 10, which comprises a steel strip body 100, and the steel strip body 100 extends generally along the first direction X. Exemplarily, the steel strip body 100 can be a silicon steel sheet, a silicon steel sheet, etc., and when a silicon steel sheet is used, the thickness (i.e. the length along the third direction Z) thereof can be 0.5 mm, for example.

[0038] Along the second direction Y, the first side of the steel strip body 100 is provided with a plurality of first buffer holes 200, and the plurality of first buffer holes 200 can be arranged at equal intervals along the first direction X. The length of the first buffer hole 200 along the second direction Y can be set as required, for example, the length of the first buffer hole 200 along the second direction Y can be less than half the length of the steel strip body 100, so as to ensure that the strength of the steel strip body 100 itself meets the requirements and avoids the steel strip from being broken. At least one elastic member 300 is arranged in the first buffer hole 200, and the two ends of the elastic member 300 along the first direction X are respectively connected to the steel strip body 100 on both sides of the first buffer hole 200. The elastic member 300 can be deformed along the extension direction of the steel strip body 100 after being subjected to force, so as to absorb stress.

[0039] As Figure 3As shown, when the steel belt 10 is wound around the axis parallel to the third direction Z towards the first side of the second direction Y, the first side of the steel belt body 100 is extruded and the second side of the steel belt body 100 is stretched along the second direction Y. Due to the presence of the first buffer hole 200, a release space can be provided for the extrusion stress, thereby avoiding the steel belt 10 from being broken due to wrinkle. At the same time, the elastic member 300 in the first buffer hole 200 can be elastically deformed and shortened after being extruded. Since the two ends of the elastic member 300 along the first direction X are respectively connected with the steel belt body 100 on both sides of the first buffer hole 200, the elastic member 300 can not only absorb the extrusion stress, but also provide a certain support for the steel belt body 100, thereby reducing the risk of the steel belt 10 being broken. That is, the present embodiment can allow the steel belt 10 to be wound with large deformation, but without large stress, and the strength of the steel belt 10 is improved by the support provided by the elastic member 300 for the steel belt body 100.

[0040] In summary, the present embodiment provides a plurality of first buffer holes 200 on the first side of the steel belt body 100 along the second direction Y, and at least one elastic member 300 is arranged in each first buffer hole 200, and the two ends of the elastic member 300 along the first direction X are respectively connected with the steel belt body 100 on both sides of the first buffer hole 200. When the steel belt 10 is wound towards the first side of the second direction Y, the first buffer hole 200 and the elastic member 300 can release the extrusion stress generated during winding, and the elastic member 300 can provide a certain support to reduce the risk of the steel belt 10 being broken.

[0041] Please continue to refer to Figure 1 and Figure 2 The elastic member 300 of the present embodiment divides the first buffer hole 200 into a plurality of first sub-buffer holes 210. Along the second direction Y, the hole diameters of the plurality of first sub-buffer holes 210 gradually decrease from the first side of the steel belt body 100 to the second side of the steel belt body 100.

[0042] Exemplarily, the first sub-buffer hole 210 of the present embodiment can be irregularly shaped, and the hole diameter of the first sub-buffer hole 210 can be understood as the longest diameter of the first sub-buffer hole 210. When the steel belt 10 is wound around the axis parallel to the third direction Z towards the first side of the second direction Y, the extrusion stress is the largest near the first side of the steel belt body 100, and the extrusion stress decreases as it is farther away from the first side of the steel belt body 100 along the second direction Y. Therefore, the structure that the hole diameters of the plurality of first sub-buffer holes 210 gradually decrease from the first side of the steel belt body 100 to the second side of the steel belt body 100 can adapt to the distribution of the extrusion stress during winding of the steel belt 10, thereby achieving a better stress release effect.

[0043] Preferably, along the second direction Y, the first buffer hole 200 of the embodiment can be provided with 1-2 elastic members 300. Correspondingly, the first buffer hole 200 can include 2-3 first sub-buffer holes 210.

[0044] In the plane defined by the first direction X and the second direction Y, the projection of the elastic member 300 of the embodiment can be wavy or zigzag-shaped, and when the elastic member 300 includes a plurality of wave crests and a plurality of wave troughs, the wave crests and the wave troughs of the elastic member 300 are arranged alternately along the first direction X. When the steel strip 10 is wound around the axis parallel to the third direction Z towards the first side of the second direction Y, the elastic member 300 is subjected to extrusion stress and elastically deformed, thereby absorbing the extrusion stress, which is embodied in structure as follows: the wavelength of the elastic member 300 decreases and the amplitude increases. As shown in Figure 2 In the embodiment, the elastic member 300 is preferably wavy-shaped, thereby facilitating production and processing.

[0045] To ensure the stress absorption effect of the elastic member 300, the elastic member 300 of the embodiment includes at least one wave crest or wave trough.

[0046] The elastic member 300 of the embodiment can be integrally formed with the steel strip body 100. Specifically, when manufacturing, a plurality of first sub-buffer holes 210 can be punched out on the steel strip body 100 at one time through a stamping process, thereby forming the elastic member 300 integrally connected with the steel strip body 100. The integrally formed manner not only can improve production efficiency, but also is beneficial to ensuring the strength of the steel strip 10 itself.

[0047] Please continue to refer to Figure 1 and Figure 2 , along the second direction Y, the first side of the steel strip body 100 of the embodiment is also provided with a plurality of second buffer holes 400, and the plurality of first buffer holes 200 and the plurality of second buffer holes 400 are arranged alternately along the first direction X.

[0048] When the steel strip 10 is wound around the axis parallel to the third direction Z towards the first side of the second direction Y, the first side of the steel strip body 100 is extruded along the second direction Y, and the embodiment can further release the extrusion stress generated when the steel strip 10 is wound by providing the plurality of second buffer holes 400, thereby further reducing the risk of wrinkles and breakage of the steel strip 10.

[0049] Please continue to refer to Figure 1 and Figure 2 , along the second direction Y, the second side of the steel strip body 100 is also provided with a plurality of third buffer holes 500, and the plurality of third buffer holes 500 can be uniformly arranged along the first direction X.

[0050] When the steel belt 10 is wound around the axis parallel to the third direction Z towards the first side of the second direction Y, the second side of the steel belt body 100 is stretched along the second direction Y, and the plurality of third buffer holes 500 provided in the embodiment can release the tensile stress generated when the steel belt 10 is wound.

[0051] Figure 4 A structural diagram of a rotor core is provided for an embodiment of the present application.

[0052] Referring to Figure 4 The embodiment provides a rotor core 1 comprising the steel belt 10.

[0053] The rotor core 1 of the embodiment can be made in a continuous winding or single piece stacking manner. It can be understood that, due to the use of the steel belt 10, the rotor core 1 of the embodiment is not easy to break and has good strength.

[0054] Preferably, the rotor core 1 of the embodiment can be continuously wound from the same steel belt 10. During manufacturing, the steel belt 10 can be wound around the same axis for several turns, and then the adjacent two turns are welded and fixed, and the two ends of the steel belt are welded and fixed with the adjacent turns, so as to prevent the rotor core 1 from cracking.

[0055] The embodiment also provides an electric machine comprising a rotor and a stator arranged oppositely, wherein the rotor comprises the rotor core.

[0056] It can be understood that, due to the use of the rotor made of the rotor core, the electric machine of the embodiment can reduce the risk of breaking of the rotor core, ensure good use stability of the electric machine, and be beneficial to prolong the service life of the electric machine.

[0057] The embodiment also provides a vehicle comprising the electric machine.

[0058] The vehicle of the embodiment may, for example, be a new energy vehicle, and the vehicle can refer to a large car, a small car, a special purpose car and the like. For example, according to the vehicle type, the vehicle of the embodiment can be a sedan type, a SUV type, a multipurpose vehicle type or other vehicle type. Due to the use of the electric machine, the vehicle of the embodiment has good use stability.

[0059] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0060] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] It should be noted that in the description of the present application, the terms "first", "second" are only used for the convenience of describing different parts, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can include at least one of the features explicitly or implicitly.

[0062] The embodiments or implementations in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0063] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steel strip, characterized in that, The device includes a steel strip body extending along a first direction; along a second direction, a plurality of first buffer holes are provided on a first side of the steel strip body, and at least one elastic element is provided in the first buffer hole, wherein the two ends of the elastic element along the first direction are respectively connected to the steel strip body on both sides of the first buffer hole; wherein the first direction and the second direction are perpendicular to each other.

2. The steel strip according to claim 1, characterized in that, The elastic element divides the first buffer hole into several first sub-buffer holes, and along the second direction, the diameter of the several first sub-buffer holes gradually decreases from the first side of the steel strip body to the second side of the steel strip body.

3. The steel strip according to claim 1, characterized in that, Within the plane defined by the first and second directions, the projection of the elastic element is wavy or serrated.

4. The steel strip according to claim 3, characterized in that, The elastic element includes at least one crest or trough.

5. The steel strip according to claim 1, characterized in that, Along the second direction, one or two elastic elements are provided in the first buffer hole.

6. The steel strip according to claim 1, characterized in that, The elastic element is integrally formed with the steel strip body.

7. The steel strip according to claim 1, characterized in that, Along the second direction, a plurality of second buffer holes are also provided on the first side of the steel strip body, and the plurality of first buffer holes and the plurality of second buffer holes are alternately arranged along the first direction.

8. The steel strip according to claim 1, characterized in that, Along the second direction, a plurality of third buffer holes are also provided on the second side of the steel strip body.

9. A rotor core, characterized in that, Includes the steel strip as described in any one of claims 1-8.

10. The rotor core according to claim 9, characterized in that, The rotor core is formed by continuously winding the same steel strip.

11. An electric motor, characterized in that, It includes a rotor and a stator arranged opposite to each other, wherein the rotor includes a rotor core as described in any one of claims 9-10.

12. A vehicle, characterized in that, Including the motor as described in claim 11.

Images