Stator punching sheet, stator core and motor
By manufacturing stator cores using centrally symmetrical stator laminations and welding, the problems of high manufacturing cost and poor heat dissipation of stator cores are solved, achieving efficient heat dissipation and improved stability.
Patent Information
- Application Number
- CN202520309211.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Existing motor stator cores have high manufacturing costs and poor heat dissipation, especially stator cores made by stacking self-adhesive stator laminations, which suffer from uneven heat conduction and poor cooling.
The stator laminations adopt a centrally symmetrical structure, with stator teeth and welds symmetrical about the axis of symmetry. After mirror stacking, the heat dissipation teeth are distributed in an alternating manner, forming a meandering heat dissipation channel, and are connected by welding, which simplifies the manufacturing process and reduces costs.
This achieves efficient heat dissipation, reduces the production cost of the stator core, improves heat dissipation efficiency and connection strength, and ensures the stability and performance of the motor.
Smart Images
Figure CN223899022U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technology field especially relates to a stator lamination, stator core and motor. BACKGROUND
[0002] In the motor operation process, the stator loss is one of the main sources of motor heating and temperature rise. In order to improve the heat dissipation efficiency of the motor, the heat dissipation teeth are arranged on the stator lamination to increase the heat dissipation area. At present, the stator core of the motor can be roughly divided into two categories: one is formed by single type of stator lamination according to single direction self-adhesion stacking, so that the aligned heat dissipation teeth form annular heat dissipation oil port between the outer side of the stator core and the motor shell, and there are problems of high manufacturing cost of self-adhesion lamination, poor heat conduction effect, uneven cooling effect and the like; the other is formed by multiple stator laminations according to single direction self-adhesion stacking, so that the heat dissipation teeth of different types of stator laminations are staggered between the outer side of the stator core and the motor shell, forming a detour heat dissipation channel, although the heat dissipation performance is improved to a certain extent, but the manufacturing cost is also increased. SUMMARY
[0003] In order to solve the technical problems of high manufacturing cost and poor heat dissipation effect of the stator core formed by self-adhesion of the stator lamination in the prior art, the utility model provides a stator lamination, a stator core and a motor, which solve the above technical problems.
[0004] In order to solve the above technical problems, the utility model provides a stator lamination, the stator lamination is central symmetry structure, the stator lamination includes:
[0005] The stator yoke part includes an inner peripheral wall and an outer peripheral wall;
[0006] The stator teeth are multiple, multiple stator teeth are arranged in a circumferential direction along the inner peripheral wall of the stator yoke part, and a wire embedding groove is formed between adjacent stator teeth;
[0007] The heat dissipation tooth group is multiple, each heat dissipation tooth group includes multiple heat dissipation teeth, and multiple heat dissipation teeth are arranged in a circumferential direction along the outer peripheral wall of the stator yoke part;
[0008] The welding seam is located between every two adjacent heat dissipation tooth groups, and the width of the welding seam is greater than the distance between adjacent two heat dissipation teeth;
[0009] Among them, multiple stator teeth are axially symmetrical about the first symmetry axis, multiple welding seams are axially symmetrical about the second symmetry axis, the first symmetry axis and the second symmetry axis have a preset included angle not being 0, so that the heat dissipation teeth (131) of two stator laminations are staggered along the stacking direction of the stator lamination after the two stator laminations are stacked according to the first symmetry axis.
[0010] According to one embodiment of the present application, the welds are provided with welding points, and the welding points on the welds are axisymmetric about the first axis of symmetry.
[0011] According to one embodiment of the present application, the welding points are protrusions, and the height of the protrusions is less than the height of the cooling teeth.
[0012] The present application also provides a stator core comprising a plurality of stator lamination groups, each of the stator lamination groups being formed by two stator laminations as described above which are mirror-imaged and stacked according to the first axis of symmetry.
[0013] According to one embodiment of the present application, each of the stator lamination groups is formed by two stator lamination segments which are mirror-imaged and stacked according to the first axis of symmetry, and each of the stator lamination segments is formed by a plurality of the stator laminations which are sequentially stacked.
[0014] According to one embodiment of the present application, adjacent stator lamination groups are rotated by a preset angle about the center of the stator laminations in a clockwise or counterclockwise direction, and the welds of the stator laminations in the adjacent stator lamination groups are connected after the rotation.
[0015] The present application also provides an electric motor comprising the stator core as described above.
[0016] According to one embodiment of the present application, the stator core further comprises core end plates located at both ends of the stator core, and the core end plates comprise end plate bodies and a plurality of tooth portions, and the tooth portions are aligned with the stator teeth of the stator laminations of the stator core.
[0017] According to one embodiment of the present application, the end plate bodies are provided with welding grooves on one side, and the welding grooves are connected with the welds of the stator laminations in the stator lamination groups.
[0018] According to one embodiment of the present application, the end plate bodies are provided with oil ports, so that the cooling medium is separated from the stator core through the oil ports or enters the stator core through the oil ports.
[0019] Based on the above technical solutions, the present application can achieve the following technical effects:
[0020] 1. The stator punching sheet of the utility model, through the symmetry axis non-parallel stator tooth and the weld, make two stator punching sheets according to the first symmetry axis mirror image lamination, the heat dissipation tooth of two stator punching sheets can be staggered along the lamination direction of stator punching sheet, make the heat dissipation tooth of the stator core outer periphery after the lamination of the stator punching sheet interlaced distribution, can form the circuitous heat dissipation oil port, guarantee the heat dissipation effect, mirror image lamination process is simple, and the processing efficiency is higher, and only need the stator punching sheet of the embodiment to realize the manufacture of stator core, can save the manufacturing cost, since the width of weld is greater than the distance between two adjacent heat dissipation teeth, two stator punching sheets can still be welded along the weld after mirror image lamination, compared with self-adhesive stator punching sheet, the efficiency of the weldable stator punching sheet for producing stator core is higher, and the connection strength is higher and the stability is stronger;
[0021] 2. The stator core of the utility model, only needs multiple single shape stator punching sheets, so only needs a set of punching die when producing the core, and the production cost is lower;
[0022] 3. The stator core of the utility model, further set the lamination mode of stator punching sheet group, make adjacent stator punching sheet group rotate a preset angle around the center of stator punching sheet according to clockwise or counterclockwise direction, can avoid uneven protrusions of stator punching sheet extruding and dislocating each other in the manufacturing process, lead to the flatness of stator core to decline, influence the performance and stability of motor;
[0023] 4. The motor of the utility model, since including the stator core described above, therefore also has the beneficial effects described above;
[0024] 5. The motor of the utility model, further set the oil port on the core end plate at both ends of stator core, make cooling medium can flow in the outer periphery flow passage of stator core fully, finally again flow out through the oil port on end plate body, improve the heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is the structure schematic view of the stator punching sheet of the utility model;
[0026] Figure 2 It is the structure schematic view of two stator punching sheets after mirror image lamination;
[0027] Figure 3 It is the local enlarged view of the weld of stator punching sheet;
[0028] Figure 4 It is the structure schematic view of the stator core of the utility model;
[0029] Figure 5 It is the structure schematic view of core end plate;
[0030] In the figure: 10 - stator lamination set; 1 - stator lamination; 11 - stator yoke; 12 - stator tooth; 13 - heat dissipation tooth set; 131 - heat dissipation tooth; 14 - weld; 15 - first symmetry axis; 16 - second symmetry axis; 17 - welding point; 20 - core end plate; 21 - end plate body; 22 - tooth part; 23 - welding groove; 24 - oil port. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0032] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.
[0033] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth herein are not limiting of the scope of the present application. It should be understood that the various parts of the drawings are not necessarily drawn to scale, and that, for the purpose of convenience and clarity, not all components can be shown in a given figure. Techniques, methods, and devices known to those of ordinary skill in the art can not be discussed in detail, but rather can be summarily described in order not to unnecessarily obscure aspects of the present application. In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In other instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an aspect of the present application. The description is not to be considered as limiting the scope of the application, but merely as illustrating typical embodiments thereof. Although specific embodiments have been illustrated and described herein, it should be appreciated that any arrangement which is calculated to achieve the same or similar result can be substituted for the specific embodiments shown. This disclosure is intended to cover all adaptations or variations of exemplary embodiments of the application. Therefore, it is intended that the application be construed broadly and be given a full scope of equivalents. Numerous specific aspects have been set forth herein to provide a thorough description of the application. However, it should be apparent that the application might be practiced without the specific details. Where technical concepts and descriptions have not been disclosed, those skilled in the art will appreciate modifications or alterations within the scope of the application. Further, it is intended that the scope of the application extend to all alternative combinations of features described herein. Moreover, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes and can not have been selected to delineate or circumscribe the patent rights of the application. Accordingly, the disclosure of the present application is intended to be illustrative, but not limiting, of the scope of the application.
[0034] In the description of the utility model, it needs to be understood that the directions such as '' front, back, up, down, left, right '', '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated direction or positional relationship is usually based on the direction or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, in the case where no contrary statement is made, these direction words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the protection scope of the utility model;Direction words '' inside, outside '' refer to the inside and outside relative to the contour of each component.
[0035] For the convenience of description, spatial relative terms such as '' above'', '' above'', '' upper surface'', '' upper '' and the like can be used here to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures. Thus, the exemplary term '' above '' can include both '' above '' and '' below '' orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used here is interpreted accordingly.
[0036] In addition, it needs to be explained that the use of '' first'', '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as the limitation of the protection scope of the utility model.
[0037] As Figure 1 And 2 As shown in the embodiment, a stator lamination 1 is provided, which is a center-symmetric structure, so that after the two stator laminations 1 are mirror-stacked, the stator teeth 12 of the two stator laminations 1 can still be aligned (as Figure 2As shown in the drawings), the stator lamination 1 comprises a stator yoke 11, a plurality of stator teeth 12, a plurality of heat dissipation tooth groups 13 and a plurality of weld seams 14, wherein the stator yoke 11 comprises an inner circumferential wall and an outer circumferential wall; the plurality of stator teeth 12 are arranged along the inner circumferential wall of the stator yoke 11 in a circumferential direction, and a wire embedding groove is formed between adjacent stator teeth 12; each of the plurality of heat dissipation tooth groups 13 comprises a plurality of heat dissipation teeth 131, and the plurality of heat dissipation teeth 131 are arranged along the outer circumferential wall of the stator yoke 11 in a circumferential direction; the weld seam 14 is located between every two adjacent heat dissipation tooth groups 13, and the width of the weld seam 14 is greater than the distance between two adjacent heat dissipation teeth 131, wherein the plurality of stator teeth 12 are axially symmetrical about a first axis of symmetry 15, the plurality of weld seams 14 are axially symmetrical about a second axis of symmetry 16, and the first axis of symmetry 15 and the second axis of symmetry 16 have a preset included angle which is not 0, so that the heat dissipation teeth 131 of the two stator laminations 1 are staggered in the stacking direction of the stator lamination after the two stator laminations 1 are mirror-stacked according to the first axis of symmetry 15 (as shown in the drawings). Figure 2 In some embodiments of the present application, the size of the preset included angle can be adjusted according to the gap between the heat dissipation teeth and the size of the weld seam, and the present embodiment is not limited in this regard.
[0038] Since the preset included angle between the axes of symmetry of the stator teeth 12 and the weld seam 14 of the stator lamination 1 of the present embodiment is not 0, i.e., the two axes of symmetry are not parallel, the heat dissipation teeth 131 of the two stator laminations 1 can be staggered in the stacking direction of the stator lamination after the two stator laminations 1 are mirror-stacked according to the first axis of symmetry 15, so that the heat dissipation teeth 131 of the outer periphery of the stator core after stacking of the stator lamination 1 are staggered (as shown in the drawings). Figure 2 As shown in the drawings), the stator lamination 1 comprises a stator yoke 11, a plurality of stator teeth 12, a plurality of heat dissipation tooth groups 13 and a plurality of weld seams 14, wherein the stator yoke 11 comprises an inner circumferential wall and an outer circumferential wall; the plurality of stator teeth 12 are arranged along the inner circumferential wall of the stator yoke 11 in a circumferential direction, and a wire embedding groove is formed between adjacent stator teeth 12; each of the plurality of heat dissipation tooth groups 13 comprises a plurality of heat dissipation teeth 131, and the plurality of heat dissipation teeth 131 are arranged along the outer circumferential wall of the stator yoke 11 in a circumferential direction; the weld seam 14 is located between every two adjacent heat dissipation tooth groups 13, and the width of the weld seam 14 is greater than the distance between two adjacent heat dissipation teeth 131, wherein the plurality of stator teeth 12 are axially symmetrical about a first axis of symmetry 15, the plurality of weld seams 14 are axially symmetrical about a second axis of symmetry 16, and the first axis of symmetry 15 and the second axis of symmetry 16 have a preset included angle which is not 0, so that the heat dissipation teeth 131 of the two stator laminations 1 are staggered in the stacking direction of the stator lamination after the two stator laminations 1 are mirror-stacked according to the first axis of symmetry 15 (as shown in the drawings).
[0039] It should be noted that in the embodiment shown in the drawings, the number of wire embedding grooves on the stator lamination 1 is 72, and the number of weld seams 14 is 8. Figure 1 In some other embodiments of the present application, the number of wire embedding grooves can be 48, 54, 96, etc., and the number of weld seams 14 can be 4, 12, 16, etc.
[0040] As shown in the drawings), the stator lamination 1 comprises a stator yoke 11, a plurality of stator teeth 12, a plurality of heat dissipation tooth groups 13 and a plurality of weld seams 14, wherein the stator yoke 11 comprises an inner circumferential wall and an outer circumferential wall; the plurality of stator teeth 12 are arranged along the inner circumferential wall of the stator yoke 11 in a circumferential direction, and a wire embedding groove is formed between adjacent stator teeth 12; each of the plurality of heat dissipation tooth groups 13 comprises a plurality of heat dissipation teeth 131, and the plurality of heat dissipation teeth 131 are arranged along the outer circumferential wall of the stator yoke 11 in a circumferential direction; the weld seam 14 is located between every two adjacent heat dissipation tooth groups 13, and the width of the weld seam 14 is greater than the distance between two adjacent heat dissipation teeth 131, wherein the plurality of stator teeth 12 are axially symmetrical about a first axis of symmetry 15, the plurality of weld seams 14 are axially symmetrical about a second axis of symmetry 16, and the first axis of symmetry 15 and the second axis of symmetry 16 have a preset included angle which is not 0, so that the heat dissipation teeth 131 of the two stator laminations 1 are staggered in the stacking direction of the stator lamination after the two stator laminations 1 are mirror-stacked according to the first axis of symmetry 15 (as shown in the drawings). Figure 3As shown in the preferred technical scheme of the embodiment, the welding points 17 can be arranged on the welding seams 14, and the welding points 17 on the plurality of welding seams 14 are axisymmetric about the first symmetry axis 15, so that the welding can be performed along the aligned welding points 17.
[0041] In an embodiment of the utility model, the welding point 17 is a protrusion, and the height of the protrusion is less than the height of the radiating tooth 131 to avoid that the high height of the protrusion leads to poor oil passage.
[0042] As shown in the preferred technical scheme of the embodiment, the welding points 17 can be arranged on the welding seams 14, and the welding points 17 on the plurality of welding seams 14 are axisymmetric about the first symmetry axis 15, so that the welding can be performed along the aligned welding points 17. Figure 4 The embodiment also provides a stator core, which comprises a plurality of stator lamination groups 10, and each stator lamination group 10 is formed by mirror image lamination of two stator laminations 1 according to the first symmetry axis 15.
[0043] In an embodiment of the utility model, the thickness of the stator lamination 1 is small, for example, less than or equal to 0.5 mm, and to ensure the lamination strength, the stator lamination group 10 is formed by mirror image lamination of two stator lamination segments according to the first symmetry axis 15, and the stator lamination segment is formed by sequentially laminating a plurality of stator laminations 1.
[0044] As the preferred technical scheme of the embodiment, the adjacent stator lamination groups 10 are rotated by a preset angle in the clockwise or counterclockwise direction around the center of the stator lamination 1, and the welding seams 14 of the stator laminations 1 in the adjacent stator lamination groups 10 are connected after rotation to ensure the welding channel.
[0045] The embodiment also provides a motor comprising the stator core described above.
[0046] As shown in the preferred technical scheme of the embodiment, the motor further comprises a core end plate 20 located at both ends of the stator core for fixing and supporting the stator core to ensure the stability and integrity of the core structure. Figure 4 5 As shown in the preferred technical scheme of the embodiment, the motor further comprises a core end plate 20 located at both ends of the stator core for fixing and supporting the stator core to ensure the stability and integrity of the core structure.
[0047] As the preferred technical scheme of the embodiment, the side of the end plate body 21 is provided with a welding groove 23, the welding groove 23 is communicated with the weld 14 of the stator punching sheet 1 in the stator punching sheet group 10, and the end plate body 21 and the stator core are welded together through the welding groove 23 and the weld 14.
[0048] In some embodiments of the utility model, the inflow and outflow channels of the cooling medium can be arranged between the stator core and the motor shell, but the inflow or outflow channel is directly arranged on the shell, so that the cooling medium is difficult to flow fully around the stator core and then flow out.
[0049] As the preferred technical scheme of the embodiment, the side of the end plate body 21 is provided with a welding groove 23, the welding groove 23 is communicated with the weld 14 of the stator punching sheet 1 in the stator punching sheet group 10, and the end plate body 21 and the stator core are welded together through the welding groove 23 and the weld 14.
[0050] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.
Claims
1. A stator lamination, characterized in that, The stator lamination has a centrally symmetrical structure, and the stator lamination includes: The stator yoke (11) includes an inner peripheral wall and an outer peripheral wall; Stator teeth (12), there are multiple stator teeth (12), the multiple stator teeth (12) are arranged circumferentially along the inner peripheral wall of the stator yoke (11), and a groove is formed between adjacent stator teeth (12); The heat dissipation tooth group (13) is a multiple group, and each group of the heat dissipation tooth group (13) includes multiple heat dissipation teeth (131), and the multiple heat dissipation teeth (131) are arranged circumferentially along the outer peripheral wall of the stator yoke (11). Weld (14), the weld (14) is located between each two adjacent sets of heat dissipation teeth (13), and the width of the weld (14) is greater than the distance between two adjacent heat dissipation teeth (131); Among them, a plurality of stator teeth (12) are symmetrical about a first axis of symmetry (15), and a plurality of welds (14) are symmetrical about a second axis of symmetry (16). The first axis of symmetry (15) and the second axis of symmetry (16) have a preset angle that is not zero, so that after the two stator laminations are mirror-stacked according to the first axis of symmetry (15), the heat dissipation teeth (131) of the two stator laminations are staggered along the stacking direction of the stator laminations.
2. The stator lamination according to claim 1, characterized in that, The weld (14) is provided with welding points (17), and the welding points (17) on the multiple welds (14) are symmetrical about the first axis of symmetry (15).
3. The stator lamination according to claim 2, characterized in that, The welding point (17) is a protrusion, and the height of the protrusion is less than the height of the heat dissipation tooth (131).
4. A stator core, characterized in that, It includes multiple sets of stator laminations (10), each set of stator laminations (10) being formed by two stator laminations (1) as described in any one of claims 1 to 3, which are mirror-stacked according to the first axis of symmetry.
5. The stator core according to claim 4, characterized in that, The stator lamination group (10) is formed by stacking two stator lamination segments in mirror image according to the first axis of symmetry, and the stator lamination segments are formed by stacking multiple stator laminations (1) as described in any one of claims 1 to 3 in sequence.
6. The stator core according to claim 4 or 5, characterized in that, The adjacent stator lamination groups (10) rotate around the center of the stator lamination (1) by a preset angle in a clockwise or counterclockwise direction. After the rotation, the welds (14) of the stator laminations (1) in the adjacent stator lamination groups (10) are connected.
7. An electric motor, characterized in that, include: The stator core as described in any one of claims 4 to 6.
8. The motor according to claim 7, characterized in that, It also includes a core end plate (20), which is located at both ends of the stator core. The core end plate (20) includes an end plate body (21) and a plurality of teeth (22), which are aligned with the stator teeth (12) of the stator laminations (1) of the stator core.
9. The motor according to claim 8, characterized in that, A welding groove (23) is provided on one side of the end plate body (21), and the welding groove (23) is connected to the weld (14) of the stator lamination (1) in the stator lamination group (10).
10. The motor according to claim 8, characterized in that, The end plate body (21) is provided with an oil port (24) so that the cooling medium can be separated from the stator core through the oil port (24) or enter the stator core through the oil port (24).