High-strength stator core and motor
The solder fixation and axisymmetric design of the M-layer iron core splicing assembly solves the elastic deformation problem of the traditional spliced iron core, improves the structural strength and stability of the iron core, and promotes the improvement of motor performance.
Patent Information
- Application Number
- CN202422612857.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Traditional spliced iron cores are prone to elastic deformation during the preparation process, resulting in bow deformation, which affects the accuracy and stability of the iron core. The problem becomes more serious as the length increases, becoming an obstacle to improving motor performance and reducing production costs.
An M-layer core splicing assembly is used, with each layer including N core pieces. The adjacent two layers of core pieces are completely overlapped and fixed by solder. Combined with the axisymmetric structure and arc surface design, solder points and grooves are used to accommodate solder to enhance the connection strength, and precise positioning is achieved through alignment grooves and protrusions.
The structural strength and precision of the iron core are improved, elastic deformation is reduced, stability is enhanced, and motor performance is improved.
Smart Images
Figure CN223378952U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a high-strength stator core and a motor. Background Art
[0002] As an indispensable power conversion device in modern industry and life, electric motors are widely used in various types of machinery, household appliances, and vehicles. In the construction of a motor, the stator is one of the core components, and its performance directly affects the overall efficiency of the motor. The stator of a centralized winding system is typically manufactured using a block core. This structure significantly reduces the axial dimension of the motor, reduces losses, saves materials, and improves production efficiency. The production process of this block core relies primarily on high-speed stamping technology. After the silicon steel sheets are punched into a predetermined shape, they are connected into a whole by stacking rivets or gluing.
[0003] However, during the production of traditional spliced cores, the stacked silicon steel sheets and their large aspect ratio make the structure susceptible to elastic deformation, resulting in a bowed core. This bowing not only affects the core's accuracy and stability but also complicates subsequent processing and assembly. This deformation becomes increasingly severe as the core length increases, becoming a major obstacle to improving motor performance and reducing production costs. Utility Model Content
[0004] The purpose of the present invention is to provide a high-strength stator core and a motor, which can improve the above-mentioned problems.
[0005] The embodiment of the present utility model is achieved as follows:
[0006] In the first aspect, the utility model provides a high-strength stator core, which includes M layers of stacked core splicing assemblies, where M is a positive integer greater than 2; each layer of the core splicing assembly includes N core sheets spliced around a preset circle, where N is an even number greater than 2; the core sheets in two adjacent layers of the core splicing assemblies completely overlap; and the core sheets in two adjacent layers are fixed to each other by solder.
[0007] As can be understood, this application provides a high-strength stator core comprising M stacked core assemblies, with the core sheets of two adjacent core assemblies completely overlapping and secured by solder. Soldering the core sheets enhances the core's structural strength, reduces elastic deformation, and improves the core's precision and stability, thereby enhancing motor performance.
[0008] In an optional embodiment of the present invention, the core monolith is an axisymmetric structure that is symmetrical about a target axis, and each of the core monoliths is provided with at least two solder points, and the at least two solder points are symmetrical about the target axis.
[0009] It can be understood that the axisymmetric structure and the arrangement of the solder points make the core more uniform during the welding process, further improving the structural stability and precision of the core.
[0010] In an optional embodiment of the present invention, the core single piece includes a first curved surface and a second curved surface arranged opposite to each other. When spliced into the core splicing assembly, the first curved surfaces are spliced to form the outer side surface of the core splicing assembly, and the second curved surfaces are spliced to form the inner side surface of the core splicing assembly; at least one solder point is arranged symmetrically about the target axis on the first curved surface, and at least one solder point is also arranged symmetrically about the target axis on the second curved surface.
[0011] It is understood that the core piece has a first curved surface and a second curved surface, and solder points are provided on the curved surface. The design of the curved side surface makes the core more compact when spliced, and the provision of the solder points enhances the connection strength between the core pieces.
[0012] In an optional embodiment of the present invention, at least one first groove is provided on the first arcuate surface; at least one second groove is provided on the second arcuate surface; the first groove and the second groove are used to accommodate solder, thereby fixing the two adjacent layers of the core monoliths.
[0013] It can be understood that the design of the groove enables the solder to be more evenly distributed between the core pieces, thereby improving the firmness of the welding and the overall strength of the core.
[0014] In an optional embodiment of the present invention, the at least one first groove is symmetrically arranged about the target axis, and the at least one second groove is also symmetrically arranged about the target axis. It can be understood that the symmetrical arrangement of the grooves makes the solder distribution more uniform, further improving the structural stability and precision of the iron core.
[0015] In an optional embodiment of the present invention, the core monolith is an axially symmetrical structure symmetrical about a target axis, and the core monolith includes a front surface and a back surface arranged relatively to each other, the front surface is provided with at least one alignment groove arranged symmetrically about the target axis, and the back surface is provided with at least one alignment protrusion arranged symmetrically about the target axis; when the core splicing assembly is stacked, the front surface of the core monolith contacts the back surface of another core monolith in an adjacent layer, and the alignment protrusion is just inserted into the alignment groove.
[0016] As you can understand, the core sheets have alignment grooves and alignment protrusions, which fit into the grooves when stacked. The design of the alignment grooves and alignment protrusions allows the core sheets to be positioned more accurately when stacked, improving the splicing accuracy and stability of the core.
[0017] In an optional embodiment of the present invention, the bottom of the alignment groove is polygonal. It can be understood that the groove design with a polygonal bottom has a better effect of preventing displacement than the arc-shaped groove design.
[0018] In an optional embodiment of the present invention, three alignment grooves are provided on the front surface, wherein the first alignment groove is symmetrically arranged about the target axis, and the second and third alignment grooves are symmetrically arranged about the target axis; and three alignment protrusions are provided on the back surface, wherein the first alignment protrusion is symmetrically arranged about the target axis, and the second and third alignment protrusions are symmetrically arranged about the target axis. It can be understood that the triangular arrangement of the alignment structure can more stably stack the upper and lower layers of the core monolithic sheets and prevent interlayer slippage.
[0019] In an optional embodiment of the present invention, the alignment groove is filled with solder to secure the adjacent core piece. It is understood that the alignment groove is filled with solder to secure the adjacent core pieces. The solder filling strengthens the connection between the core pieces, improving the shock resistance and durability of the core.
[0020] In a second aspect, the present application further discloses a motor, comprising a rotor and a stator, wherein the stator comprises the high-strength stator core as described in any one of the first aspects and a coil wound around the high-strength stator core.
[0021] Beneficial effects:
[0022] This application provides a high-strength stator core comprising M stacked core assemblies, wherein the core sheets of two adjacent core assemblies completely overlap and are secured by solder. Soldering the core sheets enhances the core's structural strength, reduces elastic deformation, and improves the core's precision and stability, thereby enhancing motor performance.
[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0025] Figure 1 This is a structural diagram of a high-strength stator core provided by the utility model;
[0026] Figure 2 yes Figure 1 The schematic diagram of the structure of the iron core monolithic piece shown;
[0027] Figure 3 This is a schematic structural diagram of another iron core monolithic chip provided by the present invention;
[0028] Figure 4 Two adjacent floors Figure 3 Schematic diagram of the stacking structure of the core monolithic pieces shown;
[0029] Figure 5 This is a positive surface structure of an iron core monolith provided by the utility model;
[0030] Figure 6 yes Figure 5 The reverse surface structure of the core monolith is shown. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0032] In a first aspect, the present invention provides a high-strength stator core, comprising M layers of stacked core splicing components, where M is a positive integer greater than 2, such as Figure 1 The high-strength stator core shown includes six layers of core splicing assemblies, namely, a first core splicing assembly 11 , a second core splicing assembly 12 , a third core splicing assembly 13 , a fourth core splicing assembly 14 , a fifth core splicing assembly 15 , and a sixth core splicing assembly 16 .
[0033] Each layer of core splicing assembly includes N core sheets spliced around a preset circle, where N is an even number greater than 2, wherein the core sheets in two adjacent layers of core splicing assemblies completely overlap; and the core sheets in two adjacent layers are fixed to each other by solder.
[0034] like Figure 1 Each core assembly shown includes 12 core pieces. For example, the first core assembly 11 includes a first core piece 111, a second core piece 112, and so on. The second core assembly 2 also includes a third core piece 121, a fourth core piece 122, and so on. The first core piece 111 completely overlaps the third core piece 121 and is secured to each other via a first solder 101. The second core piece 112 completely overlaps the fourth core piece 122 and is secured to each other via a second solder 102.
[0035] As can be understood, this application provides a high-strength stator core comprising M stacked core assemblies, with the core sheets of two adjacent core assemblies completely overlapping and secured by solder. Soldering the core sheets enhances the core's structural strength, reduces elastic deformation, and improves the core's precision and stability, thereby enhancing motor performance.
[0036] In an optional embodiment of the present invention, the core pieces are axisymmetric about a target axis, and each core piece is provided with at least two solder points, which are symmetrical about the target axis. It will be appreciated that the axisymmetric structure and the arrangement of the solder points allow for more uniform soldering of the core, further improving the structural stability and precision of the core.
[0037] In an optional embodiment of the present invention, the core monolith includes a first curved surface and a second curved surface that are relatively arranged. When spliced into a core splicing assembly, the first curved surfaces are spliced to form the outer side surface of the core splicing assembly, and the second curved surfaces are spliced to form the inner side surface of the core splicing assembly; at least one solder point is provided on the first curved surface that is symmetrically arranged about the target axis, and at least one solder point is also provided on the second curved surface that is symmetrically arranged about the target axis. It can be understood that the core monolith has a first curved surface and a second curved surface, and solder points are provided on the curved surfaces. The design of the curved side surfaces makes the core more compact when spliced, and the provision of the solder points enhances the connection strength between the core monoliths.
[0038] like Figure 2 Taking the iron core monolithic plate 20 as an example, the iron core monolithic plate 20 is an axisymmetric structure symmetrical about the target axis AA'. The iron core monolithic plate 20 is provided with a first solder point 103, a second solder point 104, and a third solder point 105. The first solder point 103 and the second solder point 104 are provided on the first arcuate surface, and the third solder point 105 is provided on the second arcuate surface.
[0039] In an optional embodiment of the present invention, at least one first groove is provided on the first curved surface, and at least one second groove is provided on the second curved surface. The first and second grooves are used to accommodate solder, thereby securing two adjacent layers of core laminations. It will be appreciated that the groove design allows the solder to be more evenly distributed between the core laminations, thereby improving the soldering strength and the overall strength of the core.
[0040] In an optional embodiment of the present invention, at least one first groove is symmetrically arranged about the target axis, and at least one second groove is also symmetrically arranged about the target axis. It can be understood that the symmetrical arrangement of the grooves makes the solder distribution more uniform, further improving the structural stability and precision of the iron core.
[0041] like Figure 3Taking the iron core monolith 30 as an example, two first grooves 301 are provided on the first arc surface of the iron core monolith 30, and a second groove 302 is provided on the second arc surface of the iron core monolith 30. The two first grooves 301 are arranged axially symmetrically. Figure 4 Two adjacent layers are shown Figure 3 The schematic diagram of the stacking and welding of the core monoliths 30 is shown. After stacking, the adjacent first grooves 301 and second grooves 302 are spliced into a larger groove, in which the solder 300 is filled to achieve mutual connection.
[0042] In an optional embodiment of the present invention, the core monolith is an axisymmetric structure symmetrical about a target axis, and the core monolith includes a front surface and a back surface arranged relative to each other, the front surface is provided with at least one alignment groove arranged symmetrically about the target axis, and the back surface is provided with at least one alignment protrusion arranged symmetrically about the target axis; when the core splicing assembly is stacked, the front surface of the core monolith contacts the back surface of another core monolith in an adjacent layer, and the alignment protrusion is just inserted into the alignment groove. It can be understood that the core monolith has an alignment groove and an alignment protrusion, and the protrusion is inserted into the groove when stacked. The design of the alignment groove and the alignment protrusion enables the core monolith to be positioned more accurately when stacked, thereby improving the splicing accuracy and stability of the core.
[0043] like Figure 4 and Figure 5 As an example, the core monolithic chip 40 shown in FIG. Figure 4 As shown, three alignment grooves are provided on the front surface, wherein the first alignment groove 41 is symmetrically arranged about the target axis, and the second alignment groove 42 and the third alignment groove 43 are symmetrically arranged about the target axis; Figure 5 The reverse surface is shown with three alignment protrusions, with the first alignment protrusion 44 symmetrically arranged about the target axis, and the second alignment protrusion 45 and the third alignment protrusion 46 symmetrically arranged about the target axis. As can be understood, the triangular alignment structure can more firmly stack the upper and lower core monolithic layers and prevent interlayer slippage.
[0044] In an optional embodiment of the present invention, the bottom of the alignment groove is polygonal. It can be understood that the groove design with a polygonal bottom has a better effect of preventing displacement than the arc-shaped groove design.
[0045] In an optional embodiment of the present invention, the alignment grooves are filled with solder to secure the adjacent core pieces. It is understood that the alignment grooves are filled with solder to secure the adjacent core pieces. The solder filling strengthens the connection between the core pieces, improving the shock resistance and durability of the core.
[0046] In a second aspect, the present application further discloses a motor, comprising a rotor and a stator, wherein the stator comprises the high-strength stator core as described in any one of the first aspects and a coil wound around the high-strength stator core.
[0047] The terms "first," "second," "the first," or "the second" used in various embodiments of the present disclosure may modify various components regardless of order and / or importance, but these terms do not limit the corresponding components. The above terms are configured solely for the purpose of distinguishing an element from other elements. For example, a first user device and a second user device represent different user devices, even though both are user devices. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.
[0048] When one element (for example, a first element) is referred to as being “(operably or communicably) coupled” or “(operably or communicably) coupled to” or “connected to” another element (for example, a second element), it should be understood that the one element is directly connected to the other element or that the one element is indirectly connected to the other element via yet another element (for example, a third element). Conversely, it should be understood that when an element (for example, a first element) is referred to as being “directly connected” or “directly coupled” to another element (the second element), there is no element (for example, a third element) interposed therebetween.
[0049] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.
[0050] The above description is merely an optional embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also encompass other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.
[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A high-strength stator core, characterized in that: It includes M layers of iron core splicing components stacked together, where M is a positive integer greater than 2; Each layer of the core splicing assembly includes N core single pieces spliced around a preset circle, where N is an even number greater than 2; The iron core single pieces in two adjacent layers of the iron core splicing assemblies are completely overlapped; The core monoliths of two adjacent layers are fixed to each other by solder.
2. The high-strength stator core according to claim 1, characterized in that: The iron core monolithic piece is an axisymmetric structure that is symmetrical about a target axis. At least two solder points are provided on each of the iron core monolithic pieces, and the at least two solder points are symmetrical about the target axis.
3. The high-strength stator core according to claim 2, characterized in that: The core single piece includes a first arcuate surface and a second arcuate surface arranged opposite to each other. When spliced into the core splicing assembly, the first arcuate surfaces form the outer side surface of the core splicing assembly, and the second arcuate surfaces form the inner side surface of the core splicing assembly. At least one solder point symmetrically arranged about the target axis is provided on the first arc surface, and at least one solder point symmetrically arranged about the target axis is also provided on the second arc surface.
4. The high-strength stator core according to claim 3, characterized in that: At least one first groove is provided on the first arc surface; at least one second groove is provided on the second arc surface; the first groove and the second groove are used to accommodate solder, thereby fixing the core monoliths of two adjacent layers.
5. The high-strength stator core according to claim 4, characterized in that: The at least one first groove is arranged symmetrically with respect to the target axis, and the at least one second groove is also arranged symmetrically with respect to the target axis.
6. The high-strength stator core according to claim 1, characterized in that: The iron core monolithic piece is an axisymmetric structure symmetrical about a target axis, and the iron core monolithic piece includes a front surface and a back surface arranged opposite to each other, the front surface is provided with at least one alignment groove arranged symmetrically about the target axis, and the back surface is provided with at least one alignment protrusion arranged symmetrically about the target axis; When the core splicing components are stacked, the front surface of the core monolith contacts the reverse surface of another core monolith in an adjacent layer, and the alignment protrusion is just inserted into the alignment groove.
7. The high-strength stator core according to claim 6, characterized in that: The bottom of the alignment groove is polygonal.
8. The high-strength stator core according to claim 7, characterized in that: Three alignment grooves are provided on the front surface, wherein the first alignment groove is symmetrically arranged about the target axis, and the second alignment groove and the third alignment groove are symmetrically arranged about the target axis; Three alignment protrusions are provided on the reverse surface, wherein the first alignment protrusion is symmetrically arranged about the target axis, and the second alignment protrusion and the third alignment protrusion are symmetrically arranged about the target axis.
9. The high-strength stator core according to any one of claims 6 to 8, characterized in that: The alignment groove is filled with solder for fixing the other iron core monolithic piece in the adjacent layer.
10. A motor, characterized in that: The invention comprises a rotor and a stator, wherein the stator comprises the high-strength stator core according to any one of claims 1 to 9 and a coil wound on the high-strength stator core.