CN116131490A - Rotor core structure for mechanically fixing magnetic steel - Google Patents
Rotor core structure for mechanically fixing magnetic steel Download PDFInfo
- Publication number
- CN116131490A CN116131490A CN202310003624.8A CN202310003624A CN116131490A CN 116131490 A CN116131490 A CN 116131490A CN 202310003624 A CN202310003624 A CN 202310003624A CN 116131490 A CN116131490 A CN 116131490A
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- CN
- China
- Prior art keywords
- magnetic steel
- iron core
- rotor core
- punching sheet
- core structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a rotor core structure for mechanically fixing magnetic steel, and belongs to the technical field of motors. The rotor core structure includes: the magnetic steel groove of the first iron core punching sheet is internally provided with at least one group of elastic fixing teeth, and the number of each group of elastic fixing teeth is at least two and is arranged along the inner wall of the magnetic steel groove from top to bottom; the second iron core punching sheets are arranged and stacked at intervals with the first iron core punching sheets; and the magnetic steel is pressed into the magnetic steel grooves of the first iron core punching sheet and the second iron core punching sheet and matched with the elastic fixing teeth so that the second iron core punching sheet and the first iron core punching sheet fix the magnetic steel. The rotor core structure can improve the efficiency of fixing the magnetic steel by the rotor core and reduce the production cost.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotor core structure for mechanically fixing magnetic steel.
Background
In the prior art, the magnetic steel is fixed mainly through the mode of moulding plastics, needs preheating before the fixed operation of mode of moulding plastics, and preparation work is long, needs injection molding machine, mould, frock, and the production man-hour cost of the change of shape is higher, and the waste material rate is high simultaneously, because its fixed irregular shape of mainly relying on after the shaping is fixed, causes the magnetic steel to be fixed insecure easily, and the magnetic pole distributes unevenly after the silicon steel is fixed, produces noise etc. easily, and the present injection molding process route faces new challenges. The glue fixing mode has the advantages that the mobility of the glue is strong, a special locking auxiliary tool is required to be designed, a glue runner is required to be designed, in addition, the glue is required to be heated and solidified, the technical process is complex, and meanwhile, the price of the magnetic steel glue is high.
Disclosure of Invention
The invention aims to provide a rotor core structure for mechanically fixing magnetic steel, which can improve efficiency and reduce cost.
In order to achieve the above object, the present invention provides a rotor core structure for mechanically fixing magnetic steel, the rotor core structure comprising:
the magnetic steel groove of the first iron core punching sheet is internally provided with at least one group of elastic fixing teeth, and the number of each group of elastic fixing teeth is at least two and is arranged along the inner wall of the magnetic steel groove from top to bottom;
the second iron core punching sheets are arranged and stacked at intervals with the first iron core punching sheets;
and the magnetic steel is pressed into the magnetic steel grooves of the first iron core punching sheet and the second iron core punching sheet and matched with the elastic fixing teeth so that the second iron core punching sheet and the first iron core punching sheet fix the magnetic steel.
Optionally, the inner wall of the magnetic steel groove of the first iron core punching sheet is provided with a recess, the elastic fixing teeth are arranged in the recess, and the height of the elastic fixing teeth is greater than the depth of the recess.
Optionally, a recess is provided on the inner wall of the magnetic steel groove of the second core sheet 1.
Optionally, the width of the elastic fixing teeth ranges from 0.5 mm to 1.5 mm.
Optionally, the height of the elastic fixing teeth ranges from 0.4 mm to 0.6 mm.
Optionally, under the condition that the magnetic steel is pressed into the magnetic steel groove, the value range of the unilateral gap between the magnetic steel and the magnetic steel groove is 0.03-0.095 mm.
Alternatively, the number of the groups of the elastic fixing teeth may range from 3 to 20 groups on a single rotor core structure.
Optionally, at least one set of resilient fixed teeth are superimposed on each other to form a layer of resilient fixed teeth.
According to the technical scheme, the rotor core structure for mechanically fixing the magnetic steel is provided, at least one group of elastic fixing teeth are arranged in the magnetic steel groove of the first core punching sheet, the number of each group of elastic fixing teeth is at least two, the elastic fixing teeth are arranged along the inner wall of the magnetic steel groove from top to bottom, the second core punching sheet and the first core punching sheet are arranged and stacked at intervals, and the magnetic steel is used for being pressed into the magnetic steel grooves of the first core punching sheet and the second core punching sheet and matched with the elastic fixing teeth, so that the magnetic steel is fixed by the second core punching sheet and the first core punching sheet, mechanical fixing of the magnetic steel is realized, the efficiency of fixing the magnetic steel is improved, and the production cost is reduced.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
fig. 1 is a schematic view of a first core segment according to one embodiment of the present invention;
fig. 2 is a schematic view of a second core segment according to one embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of a magnetic steel slot after stacking a first core segment and a second core segment according to one embodiment of the present invention;
FIG. 4 is a schematic illustration of a magnetic steel pressed into a magnetic steel groove according to one embodiment of the present invention;
FIG. 5 is a schematic view of a resilient fixed tooth layer according to one embodiment of the invention;
fig. 6 is a line graph of a magnetic steel push-out force according to one embodiment of the present invention.
Description of the reference numerals
1. Second iron core punching sheet 2 and magnetic steel
3a, elastic fixed teeth 3b, elastic fixed teeth layer
4. Magnetic steel groove 5 and first iron core punching sheet
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The invention provides a rotor core structure for mechanically fixing magnetic steel, which can comprise a first core punching sheet 5, a second core punching sheet 1 and magnetic steel 2. Wherein, the first iron core punching sheet 5 and the second iron core punching sheet 1 can be provided with a magnetic steel groove 4. The first core sheet 5 and the second core sheet 1 may be stacked in a spaced arrangement from each other. The magnetic steel 2 can be pressed into the magnetic steel grooves 4 on the first iron core punching sheet 5 and the second iron core punching sheet 1 to fix the magnetic steel.
Fig. 1 is a schematic view of a first core segment 5 according to one embodiment of the invention; fig. 2 is a schematic view of a second core segment 1 according to an embodiment of the present invention; fig. 3 is a partial cross-sectional view of the magnetic steel slots 4 after the first core segment 5 and the second core segment 1 are stacked according to an embodiment of the present invention; fig. 4 is a schematic view of the pressing of the magnetic steel 2 into the magnetic steel groove 4 according to an embodiment of the present invention. At least one group of elastic fixing teeth 3a are arranged in the magnetic steel groove 4 of the first iron core punching sheet 5, the number of each group of elastic fixing teeth 3a is at least two, the elastic fixing teeth are arranged along the inner wall of the magnetic steel groove 4 from top to bottom, and the second iron core punching sheet 1 and the first iron core punching sheet 5 are stacked at intervals, as shown in fig. 1, 2 and 3. The magnetic steel 2 is pressed into the magnetic steel grooves 4 of the first iron core punching sheet 5 and the second iron core punching sheet 1, and is matched with the elastic fixing teeth 3a so as to be fixed in the magnetic steel grooves 4 of the second iron core punching sheet 1 and the first iron core punching sheet 5, as shown in fig. 4.
In this embodiment, the inner walls of the magnetic steel grooves 4 of the first and second core sheets 5, 1 are provided with recesses in which the elastic fixing teeth 3a are provided, and the height of the elastic fixing teeth 3a is greater than the depth of the recesses, as shown in fig. 1, 2. Wherein, the width of the elastic fixed teeth 3a of the first iron core punching sheet 5 is 0.5 to 1.5 mm, and the height is 0.4 to 0.6 mm; in the case where the magnetic steel 2 is pressed into the magnetic steel groove 4, the value of the single-side gap between the magnetic steel 2 and the magnetic steel groove 4 is in the range of 0.03 mm to 0.095 mm.
Fig. 4 is a schematic diagram of the pressing of the magnetic steel 2 into the magnetic steel groove 4 according to an embodiment of the present invention. When the magnetic steel 2 is pressed into the magnetic steel groove 4, the force applied to the magnetic steel 2 is transmitted to the elastic fixed teeth 3a, the magnetic steel 2 forces the elastic fixed teeth 3a to bend towards the stress direction, and after the magnetic steel 2 is pressed in, the bent elastic fixed teeth 3a provide elasticity and extrusion force to fix the magnetic steel 2. In this embodiment, at least one group of elastic fixed teeth 3a are overlapped with each other to form an elastic fixed tooth layer 3b, the push-out force of the magnetic steel 2 is increased, and the push-out force of the magnetic steel 2 is obtained by a digital display type press machine test, as shown in fig. 5 and 6. In order to better increase the elastic force provided by the elastic fixed teeth 3a, the number of the elastic fixed teeth 3a is 3 to 20 groups on a single rotor core structure, and the elastic fixed teeth are uniformly distributed on the rotor core structure.
According to the technical scheme, the rotor core structure for mechanically fixing the magnetic steel is provided, at least one group of elastic fixing teeth are arranged in the magnetic steel groove of the first core punching sheet, the number of each group of elastic fixing teeth is at least two, the elastic fixing teeth are arranged along the inner wall of the magnetic steel groove from top to bottom, the second core punching sheet and the first core punching sheet are arranged and stacked at intervals, and the magnetic steel is used for being pressed into the magnetic steel grooves of the first core punching sheet and the second core punching sheet and matched with the elastic fixing teeth, so that the magnetic steel is fixed by the second core punching sheet and the first core punching sheet, mechanical fixing of the magnetic steel is realized, the efficiency of fixing the magnetic steel is improved, and the production cost is reduced.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. The technical solution of the invention can be subjected to a plurality of simple variants within the scope of the technical idea of the invention. Including the combination of the specific features in any suitable manner, the invention will not be described in any way in any possible combination in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (8)
1. A rotor core structure of mechanically fixed magnetic steel, characterized in that the rotor core structure comprises:
the magnetic steel groove (4) of the first iron core punching sheet (5) is internally provided with at least one group of elastic fixing teeth (3 a), and the number of each group of elastic fixing teeth (3 a) is at least two and is arranged along the inner wall of the magnetic steel groove (4) from top to bottom;
the second iron core punching sheets (1) are stacked with the first iron core punching sheets (5) at intervals;
and the magnetic steel (2) is pressed into the magnetic steel grooves (4) of the first iron core punching sheet (5) and the second iron core punching sheet (1) and is matched with the elastic fixing teeth (3 a), so that the magnetic steel (2) is fixed by the second iron core punching sheet (1) and the first iron core punching sheet (5).
2. Rotor core structure according to claim 1, characterized in that the inner wall of the magnetic steel slot (4) of the first core sheet (5) is provided with a recess, the elastic fixing teeth (3 a) are arranged in the recess, and the height of the elastic fixing teeth (3 a) is larger than the depth of the recess.
3. Rotor core structure according to claim 1, characterized in that the inner walls of the magnetic steel slots (4) of the second core sheet (1) are provided with recesses.
4. A rotor core structure according to claim 1, characterized in that the width of the elastic fixing teeth (3 a) is in the range of 0.5 mm to 1.5 mm.
5. A rotor core structure according to claim 1, characterized in that the height of the elastic fixing teeth (3 a) is in the range of 0.4 mm to 0.6 mm.
6. The rotor core structure according to claim 1, characterized in that, in the case where the magnetic steel (2) is pressed into the magnetic steel groove (4), the single-sided gap between the magnetic steel (2) and the magnetic steel groove (4) has a value ranging from 0.03 mm to 0.095 mm.
7. Rotor core structure according to claim 1, characterized in that the number of groups of elastic fixing teeth (3 a) on a single rotor core structure is in the range of 3 to 20 groups.
8. A rotor core structure according to claim 1, characterized in that at least one set of elastic fixation teeth (3 a) are superimposed on each other to form an elastic fixation tooth layer (3 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310003624.8A CN116131490A (en) | 2023-01-03 | 2023-01-03 | Rotor core structure for mechanically fixing magnetic steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310003624.8A CN116131490A (en) | 2023-01-03 | 2023-01-03 | Rotor core structure for mechanically fixing magnetic steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116131490A true CN116131490A (en) | 2023-05-16 |
Family
ID=86305929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310003624.8A Pending CN116131490A (en) | 2023-01-03 | 2023-01-03 | Rotor core structure for mechanically fixing magnetic steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116131490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116896193A (en) * | 2023-09-11 | 2023-10-17 | 天蔚蓝电驱动科技(江苏)有限公司 | Rotor lamination, rotor core and rotor |
-
2023
- 2023-01-03 CN CN202310003624.8A patent/CN116131490A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116896193A (en) * | 2023-09-11 | 2023-10-17 | 天蔚蓝电驱动科技(江苏)有限公司 | Rotor lamination, rotor core and rotor |
| CN116896193B (en) * | 2023-09-11 | 2023-12-12 | 天蔚蓝电驱动科技(江苏)有限公司 | Rotor lamination, rotor core and rotor |
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