Stator core
By using amorphous material as the main body in the motor core and combining the design of silicon steel punching sheets and rivets, the problem of insufficient strength of the amorphous material core is solved, and the double improvement of performance and strength is achieved.
Patent Information
- Application Number
- CN202421795452.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The core of the motor made of existing amorphous materials is insufficient in strength, poor in stability, and difficult to take into account both performance and strength.
A stator core is designed, using amorphous material as part of the main body, and the strength is increased by stacking silicon steel punches and rivets. The specific implementation method includes integrated stamping molding or split assembly molding, and setting staggers at the splicing seams to increase support.
The overall performance of the stator core is improved through amorphous materials, and the strength is significantly improved through the setting of silicon steel punching sheets and rivets, solving the contradiction between performance and strength.
Smart Images
Figure CN222981304U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a stator core. Background Art
[0002] With the intensification of competition in new energy vehicles, the requirements for automotive drive motors are getting higher and higher, such as high efficiency, high power, high speed, etc. The use of silicon steel sheets for motor materials is also tending to be thinner and stronger. In order to achieve extreme performance, the material thickness of silicon steel sheets has gradually changed from the original 0.5mm to 0.35mm, 0.27mm, 0.2mm, 0.15mm or even 0.10mm. Some enterprises have already adopted amorphous materials to produce motor cores.
[0003] Although amorphous materials have excellent performance, they are brittle, and the cores made have poor strength and stability. At this time, performance and strength seem to be a pair of contradictions.
[0004] In view of this, it is necessary to propose a new technical solution to overcome the deficiencies of the prior art. Summary of the Utility Model
[0005] The purpose of this application is to provide a stator core that can improve performance and increase strength while using amorphous materials.
[0006] To achieve the above purpose, a stator core designed by the utility model includes a main body and silicon steel punching sheets stacked at opposite ends of the main body. The main body includes at least one first punching sheet. The first punching sheet is integrally stamped or the first punching sheet is assembled in a split manner. When the first punching sheet is integrally stamped, the first punching sheet is made of amorphous material. When the first punching sheet is assembled in a split manner, the first punching sheet includes a first assembled block and a second assembled block. Both the first assembled block and the second assembled block are fan-shaped. The first assembled block is inserted between multiple second assembled blocks. The first assembled block is made of amorphous material or silicon steel material, and the second assembled block is made of amorphous material.
[0007] Further, when the main body includes multiple first punching sheets, a second punching sheet made of silicon steel material is stacked between adjacent first punching sheets to further improve the strength of the stator core through the second punching sheet made of silicon steel material.
[0008] Further, when the main body includes multiple first punching sheets, multiple first punching sheets form a group, and a second punching sheet made of silicon steel material is stacked between adjacent groups of first punching sheets. The number of first punching sheets in each group can be the same or different. The strength of the stator core is also further improved through the second punching sheet made of silicon steel material.
[0009] Further, a splicing seam is formed between the first assembling block and the second assembling block and between the second assembling blocks. When the main body includes a plurality of first punching sheets stacked on top of each other, the splicing seams of adjacent layers are staggered. The staggering of the splicing seams enables the splicing seams to be supported by the first punching sheets of adjacent layers, which can further improve the strength of the stator core.
[0010] A splicing method between the first splicing block and the second splicing block. The first assembling block is provided with a first splicing block and a first splicing groove, the second assembling block is provided with a second splicing block and a second splicing groove, the first splicing block is adapted to the second splicing groove, the second splicing block is adapted to the first splicing groove, the second splicing block is adapted to the second splicing groove, and a splicing seam is formed between the first assembling block and the second assembling block and between the second assembling blocks.
[0011] Further, when the thickness of the first assembling block is greater than that of the second assembling block, the second assembling block includes a plurality of third assembling blocks stacked on top of each other. The third assembling block is provided with a third assembling block and a third splicing groove. After the third assembling blocks are stacked, they form the second assembling block, and after the third splicing grooves are stacked, they form the third splicing groove.
[0012] Further, the outer diameter D1 of the silicon steel punching sheet is greater than or equal to the outer diameter D2 of the first punching sheet.
[0013] Further, 0.02 mm ≤ D1 - D2 ≤ 0.2 mm.
[0014] Further, it further includes a plurality of oil grooves, and the oil grooves axially penetrate through the silicon steel punching sheet and the main body.
[0015] Further, some of the oil grooves are provided with rivets, and the rivets rivet the silicon steel punching sheet and the main body together to strengthen the strength of the stator core through the rivets.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows: The main body includes a first punching sheet. The first punching sheet is made of amorphous material or the second assembling block in the first punching sheet is made of amorphous material, which can improve the overall performance of the stator core. At the same time, the strength of the stator core is improved by the silicon steel punching sheets stacked at both ends of the main body.
[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of a stator core in this application.
[0019] Figure 2 is another schematic structural diagram of a stator core in this application.
[0020] Figure 3 is another schematic structural diagram of a stator core in this application.
[0021] Figure 4 It is another schematic structural diagram of the stator core in this application.
[0022] Figure 5 It is another schematic structural diagram of the stator core in this application.
[0023] Figure 6 It is another schematic structural diagram of the stator core in this application.
[0024] Figure 7 It is another schematic structural diagram of the stator core in this application.
[0025] Figure 8 It is a schematic structural diagram of a silicon steel punching sheet, a first punching sheet, and a second punching sheet.
[0026] Figure 9 It is a schematic structural diagram of a first punching sheet.
[0027] Figure 10 It is another schematic structural diagram of the first punching sheet.
[0028] Figure 11 It is another schematic structural diagram of the first punching sheet.
[0029] Figure 12 It is a schematic structural diagram of a first assembling block, a second assembling block, and a third assembling block. Detailed implementation mode
[0030] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are only examples of devices, systems, devices, and methods consistent with some aspects of this application.
[0031] As Figures 1 - 12 shown, a stator core of this application includes a main body 1 and silicon steel punching sheets 2 stacked on opposite ends of the main body 1. The main body 1 and the silicon steel punching sheets 2 are both annular and coaxially arranged.
[0032] The main body 1 includes at least one first punching sheet 3, and the first punching sheet 3 is also annular. In order to improve the overall performance of the stator core, the first punching sheet 3 needs to be made of amorphous material. When the volume of the stator core is small, the first punching sheet 3 is made of amorphous material, and the first punching sheet 3 is preferably integrally stamped. Please refer to Figure 8 shown, when the volume of the stator core is large, since the bandwidth of the amorphous material is relatively small, the first punching sheet 3 is selected to be formed by split assembly. Please refer to Figures 1 - 7, as shown in FIGS. 9 to 12, the first punching sheet 3 includes a first assembling block 31 and a second assembling block 32. Both the first assembling block 31 and the second assembling block 32 are fan-shaped. The first assembling block 31 is inserted between a plurality of second assembling blocks 32, so that the first assembling block 31 and the second assembling block 32 are assembled into the first punching sheet 3. At this time, the first assembling block 31 is made of amorphous material or silicon steel material, and the second assembling block 32 is made of amorphous material.
[0033] When the first assembling block 31 is inserted between a plurality of second assembling blocks 32, the first assembling block 31 and the second assembling block 32 can be assembled alternately. Please refer to Figure 9 shown. One or more first assembling blocks 31 can also be inserted between two or more second assembling blocks 32. At this time, the number of second assembling blocks 32 at both ends of the first assembling block 31 can be equal. Please refer to Figure 10 shown, or they can be unequal. Please refer to Figure 11 shown.
[0034] The first punching sheet 3 or the second assembling block 32 made of amorphous material can improve the performance of the stator core, and the silicon steel punching sheets 2 at both ends of the main body 1 can improve the strength of the stator core, realizing the double improvement of strength and performance.
[0035] The main body 1 includes a plurality of first punching sheets 3, and the plurality of first punching sheets 3 are stacked. In order to further improve the strength of the stator core, a second punching sheet 4 is stacked between adjacent first punching sheets 3, or a plurality of first punching sheets 3 form a group, and a second punching sheet 4 is stacked between adjacent groups of first punching sheets 3. The second punching sheet 4 is made of silicon steel material. Of course, the number of first punching sheets 3 in adjacent groups can be equal or unequal.
[0036] Splicing seams 33 are formed between the first assembling block 31 and the second assembling block 32 and between the second assembling blocks 32. When the main body 1 includes a plurality of first punching sheets 3 stacked on top of each other, the splicing seams 33 of adjacent layers are arranged staggeredly. The staggered splicing seams 33 enable the splicing seams 33 to be supported by the first punching sheets 3 of adjacent layers, which can further improve the strength of the stator core. Preferably, the splicing seam 33 of one layer is located at the middle position between a pair of splicing seams 33 of the adjacent layer. At this time, the balance of the splicing seam 33 being supported by the first punching sheets 3 of the adjacent layer is the best.
[0037] A way of assembling between the first splicing block 31 and the second splicing block 32. The first splicing block 31 is provided with a first splicing block 311 and a first splicing groove 312. The second splicing block 32 is provided with a second splicing block 321 and a second splicing groove 322. The first splicing block 311 is adapted to the second splicing groove 322, the second splicing block 321 is adapted to the first splicing groove 312, and the second splicing block 321 is adapted to the second splicing groove 322. The first splicing block 31 and the second splicing block 32 are assembled through the first splicing block 311 and the second splicing groove 322 or the first splicing groove 312 and the second splicing block 321. The second splicing blocks 32 are assembled through the second splicing block 321 and the second splicing groove 322. One end on the right side of the first splicing block 31 is provided with the first splicing block 311, one end on the left side of the first splicing block 31 is provided with the first splicing groove 312, one end on the left side of the second splicing block 32 is provided with the second splicing groove 322, and one end on the right side of the second splicing block 32 is provided with the second splicing block 321. Or one end on the right side of the first splicing block 31 is provided with the first splicing groove 312, one end on the left side of the first splicing block 31 is provided with the first splicing block 311, one end on the left side of the second splicing block 32 is provided with the second splicing block 321, and one end on the right side of the second splicing block 32 is provided with the second splicing groove 322, realizing the assembly between the first splicing block 31 and the second splicing block 32 and the assembly between the second splicing block 32 and the second splicing block 32. The numbers of the first splicing block 311, the first splicing groove 312, the second splicing block 321, and the second splicing groove 322 are all equal.
[0038] Of course, the connection method between the first splicing block 31 and the second splicing block 32 is not limited to the above one, such as welding, plugging, etc.
[0039] When the first splicing block 31 is made of silicon steel material, the thickness of the silicon steel punching sheet is generally 0.1mm - 0.2mm, and the thickness of the amorphous material is generally 0.025mm. The thickness of the first splicing block 31 is greater than that of the second splicing block 32. At this time, the second splicing block 32 includes a plurality of third splicing blocks 34 stacked together. Please refer to Figure 7 As shown, the third splicing block 44 is provided with a third splicing block 441 and a third splicing groove 442. After the third splicing blocks 44 are stacked, they form the second splicing block 42. After the third splicing blocks 441 are stacked, they form the second splicing block 321. After the third splicing grooves 342 are stacked, they form the second splicing groove 322. The thickness requirement is achieved through the stacking of multiple third splicing blocks 34, so that the upper end surface of the second splicing block 32 is in the same plane as the upper end surface of the first splicing block 31, and the lower end surface of the second splicing block 32 is also in the same plane as the lower end surface of the first splicing block 31, realizing the flatness of the stator core.
[0040] The outer diameter D1 of the silicon steel punching sheet 2 is greater than or equal to the outer diameter D2 of the first punching sheet 3. The outer diameter of the first punching sheet 3 can be equal to the outer diameter of the silicon steel punching sheets 2 stacked at both ends of the main body 1, or can be smaller than the outer diameter of the silicon steel punching sheet 2. Please refer to Figures 4 - 7 As shown, the outer diameter difference between the two is preferably 0.02 mm ≤ D1 - D2 ≤ 0.2 mm.
[0041] The outer diameter D1 of the silicon steel punching sheet 2 being greater than the outer diameter D2 of the first punching sheet 3 can protect the first punching sheet 3 from being squeezed.
[0042] The second punching sheet 4 in the main body 1 is made of silicon steel material, and the outer diameter of the second punching sheet 4 can also be D1, which is greater than the outer diameter D2 of the first punching sheet 3, further playing a protective role for the first punching sheet 3.
[0043] A number of oil grooves 5 are also provided on the stator core. The oil grooves 5 are evenly distributed according to the central axis of the stator core. The oil grooves 5 axially penetrate through the silicon steel punching sheet 2 and the main body 1. Some of the oil grooves 5 are provided with rivets, and the rivets rivet the silicon steel punching sheet 2 and the main body 1 together, further strengthening the strength of the stator core through the rivets. It is only necessary to set rivets in some of the oil grooves 5, and the rivets are evenly distributed in a ring outside the central axis of the stator core. Among them, the shape of the rivets is adapted to the shape of the oil grooves 5. In this embodiment, the rivets are square rivets.
[0044] The first punching sheet 3 is made of amorphous material or the second assembled block 32 in the first punching sheet 3 is made of amorphous material, which can improve the overall performance of the stator core. Also, through the settings of the silicon steel punching sheets 2 at both ends, the second punching sheet 4 and the rivets, the strength of the stator core can be increased, so that the strength and performance of the stator core are improved synchronously.
[0045] It should be noted that the thicknesses of the silicon steel punching sheet, the first punching sheet and the second punching sheet in the drawings are not the actual thicknesses. Some are only for the convenience of showing the structure. For example, the thickness of the silicon steel punching sheet is less than the thickness of the first punching sheet, just to better show the first punching sheet.
[0046] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.
Claims
1. A stator core, characterized in that: It includes a main body and silicon steel punching sheets stacked on opposite ends of the main body, the main body includes at least one first punching sheet, the first punching sheet is integrally stamped or the first punching sheet is assembled in parts, when the first punching sheet is integrally stamped, the first punching sheet is made of amorphous material, when the first punching sheet is assembled in parts, the first punching sheet includes a first assembling block and a second assembling block, the first assembling block and the second assembling block are both fan-shaped, the first assembling block is interspersed between multiple second assembling blocks, the first assembling block is made of amorphous material or silicon steel material, and the second assembling block is made of amorphous material.
2. The stator core according to claim 1, characterized in that: When the main body includes a plurality of first punching sheets, second punching sheets are stacked between adjacent first punching sheets, and the second punching sheets are made of silicon steel material.
3. The stator core according to claim 1, characterized in that: When the main body includes a plurality of first punching sheets, the plurality of first punching sheets form a group, and second punching sheets are stacked between adjacent groups of the first punching sheets, and the second punching sheets are made of silicon steel material.
4. The stator core according to claim 1, characterized in that: Splicing seams are formed between the first assembling blocks and the second assembling blocks, and between the second assembling blocks. When the main body includes a plurality of first punching sheets stacked in layers, the splicing seams of adjacent layers are staggered.
5. The stator core according to claim 1, characterized in that: The first assembling block is provided with a first assembling block and a first assembling groove, the second assembling block is provided with a second assembling block and a second assembling groove, the first assembling block is adapted to the second assembling groove, the second assembling block is adapted to the first assembling groove, the second assembling block is adapted to the second assembling groove, and a splicing seam is formed between the first assembling block and the second assembling block and between the second assembling blocks.
6. The stator core according to claim 5, characterized in that: When the thickness of the first assembling block is greater than that of the second assembling block, the second assembling block includes a plurality of stacked third assembling blocks, the third assembling block is provided with a third assembling block and a third assembling groove, the third assembling blocks are stacked to form the second assembling block, and the third assembling grooves are stacked to form the third assembling grooves.
7. The stator core according to claim 1, characterized in that: The outer diameter D1 of the silicon steel punching sheet is greater than or equal to the outer diameter D2 of the first punching sheet.
8. The stator core according to claim 7, characterized in that: 0.02mm≤D1-D2≤0.2mm.
9. The stator core according to claim 1, characterized in that: It also includes a plurality of oil grooves, and the oil grooves axially penetrate the silicon steel punching sheet and the main body.
10. The stator core according to claim 9, characterized in that: Rivets are arranged in some of the oil grooves, and the rivets rivet the silicon steel punching sheet and the main body together.