CN111614174A - Surface-mounted motor rotor - Google Patents
Surface-mounted motor rotor Download PDFInfo
- Publication number
- CN111614174A CN111614174A CN201910136698.2A CN201910136698A CN111614174A CN 111614174 A CN111614174 A CN 111614174A CN 201910136698 A CN201910136698 A CN 201910136698A CN 111614174 A CN111614174 A CN 111614174A
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- Prior art keywords
- permanent magnet
- rotor
- groove
- motor rotor
- structures
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a surface-mounted motor rotor, in particular to a motor rotor for a surface-mounted permanent magnet synchronous motor, which comprises an annular columnar rotor body, wherein a plurality of grooves are formed in the circumferential direction of the rotor body; the permanent magnets are connected to the rotor body and arranged in the grooves; wherein the groove is configured to capture the permanent magnet. The groove capable of clamping the permanent magnet is arranged, so that the permanent magnet is prevented from flying out when the motor rotates, and the permanent magnet is connected in a more stable manner without using a binder.
Description
Technical Field
The invention relates to a surface-mounted motor rotor, in particular to a motor rotor for a surface-mounted permanent magnet synchronous motor.
Background
The surface-mounted permanent magnet synchronous motor has the advantages of small volume, high efficiency, large torque density and the like. Generally, a permanent magnet of a surface-mount permanent magnet synchronous motor needs to be fixed on the surface of a rotor core through a special adhesive. The permanent magnet synchronous motor with the rotor structure has the advantages of simple structure, low manufacturing cost, convenience in installation, small rotational inertia and wide application in practical engineering. However, with the expansion of the market and the increase of product users, the requirements of users on the performance of the rotating speed of the driving motor and the like are higher and higher.
When the surface-mounted permanent magnet synchronous motor rotates, the permanent magnet can be subjected to larger centrifugal force. In order to prevent the permanent magnets from flying out under the centrifugal force when the motor rotates, it is necessary to ensure that the adhesive has sufficiently excellent properties and that the rotor core has small burrs. These problems severely limit the speed and size of the motor. It is also known to use non-magnetic cylinders or laid glass ribbons as protective layers for the permanent magnets. However, the method has certain influence on the air gap, and the cylinder is difficult to process, so that the chamber sweeping phenomenon is easy to occur.
Disclosure of Invention
In order to solve the problems, the invention provides a surface-mounted motor rotor which is provided with a groove capable of clamping a permanent magnet, so that the surface-mounted motor rotor is prevented from flying out when a motor rotates, does not need an adhesive and is more stable in connection.
The invention provides a surface-mounted motor rotor, which comprises:
the rotor comprises an annular columnar rotor body, wherein a plurality of grooves are formed in the circumferential direction of the rotor body;
the permanent magnets are connected to the rotor body and arranged in the grooves;
wherein the groove is configured to capture the permanent magnet.
The invention has the further improvement that the rotor body comprises a plurality of punching sheets, and the punching sheets are overlapped and connected to form an integral rotor body.
The invention has the further improvement that convex structures are arranged on two sides of the groove, concave structures matched with the convex structures in shape are arranged on two sides of the permanent magnet, and the convex structures are filled in the concave structures.
The invention is further improved in that concave structures are arranged on two sides of the groove.
The invention further improves the structure that the two sides of the permanent magnet are provided with convex structures matched with the concave structures in shape, and the convex structures are filled in the concave structures.
The invention has the further improvement that concave structures are arranged on two sides of the permanent magnet, clamping bodies are arranged on two sides of the permanent magnet, and the clamping bodies are filled between the concave structures and the concave structures.
The invention is further improved in that the section of the clamping body is in a wedge shape.
The invention has the further improvement that the section of the groove is trapezoidal, and the long side of the trapezoid is close to the center of the punching sheet; the section of the permanent magnet is trapezoidal matched with the section of the groove in the axial direction.
A further development of the invention is that there is a certain clearance between the groove and the edge of the permanent magnet.
The invention has the further improvement that the bottom of the groove is provided with a positioning clamping groove, and the width of the positioning clamping groove is matched with the width of the bottom of the permanent magnet.
Compared with the prior art, the invention has the advantages that:
in the surface-mounted motor rotor, a structure with clamping capacity is arranged in the groove. The permanent magnet is clamped by the groove through the structure of the groove, so that the permanent magnet is prevented from flying out when the motor rotates. By the surface-mounted motor rotor according to the embodiment, no adhesive is needed, and the connection is more stable.
In the surface-mounted motor rotor, the structural forms of the rotor punching sheet and the permanent magnet are optimized, and a convex structure is additionally arranged between the rotor punching sheet and the permanent magnet to enhance the adhesive force of the permanent magnet when the large-sized rotor rotates or the rotor rotates at a high speed, so that the large-sized rotor can bear larger centrifugal force. The invention effectively solves the limitation that the surface-mounted motor can only be applied to a small-size low-rotating-speed motor, and breaks the technical barrier. The installation process of the permanent magnet is simplified, and the cost is obviously reduced while the long-term fixing effect of the permanent magnet is ensured.
Drawings
FIG. 1 is a schematic structural view of a rotor of a surface mount machine according to an embodiment of the present invention;
FIG. 2 is a schematic view of permanent magnet attachment according to one embodiment of the present invention, showing the structure of a permanent magnet provided with a recessed structure;
FIG. 3 is a schematic view of a permanent magnet attachment according to one embodiment of the present invention, showing the concave structure provided in an arc shape;
FIG. 4 is a schematic view of a permanent magnet attachment according to an embodiment of the present invention, showing the structure of a permanent magnet provided with a protruding structure;
FIG. 5 is a schematic view of a permanent magnet attachment according to an embodiment of the present invention, showing a structure provided with a snap body;
FIG. 6 is a schematic view of a permanent magnet attachment according to one embodiment of the present invention, showing a configuration in which both the grooves and the permanent magnet are trapezoidal;
FIG. 7 is a schematic view of a permanent magnet attachment according to one embodiment of the present invention, showing a permanent magnet provided with a concave structure and a convex structure;
FIG. 8 is a schematic view of a permanent magnet attachment showing a configuration in which locator card slots are provided, according to one embodiment of the present invention;
in the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The meaning of the reference symbols in the drawings is as follows: 1. the rotor comprises a rotor body, 2, permanent magnets, 3, a clamping body, 11, a groove, 12, a convex structure, 13, a concave structure, 14, a positioning clamping groove, 21, a concave structure, 22 and a convex structure.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 schematically shows a surface-mounted electric machine rotor according to an embodiment of the invention. According to the surface-mounted motor rotor, the permanent magnet 2 is fixed in the groove 11 of the rotor body 1 in a clamping mode, the permanent magnet 2 is prevented from flying out under the action of centrifugal force when the motor rotates, no adhesive is needed, and connection is more stable.
As shown in fig. 1, the surface-mount motor rotor according to the present embodiment includes a rotor body 1 having an annular column structure. The annular column structure is a structure with a circular ring-shaped section. The edge of the rotor body 1 is uniformly provided with a plurality of grooves 11. The surface-mounted motor rotor of the embodiment further comprises a plurality of permanent magnets 2, wherein the permanent magnets 2 are arranged on the circumferential direction of the rotor body 1, and the permanent magnets 2 are fixed in the grooves 11. The permanent magnet 2 is matched with the groove 11 in shape, and the outer edge of the permanent magnet 2 is flush with the circumferential surface of the rotor body 1 after the permanent magnet 2 is installed. In the embodiment, the groove 11 is configured to be able to catch and fix the permanent magnet 2, and the permanent magnet 2 is ensured not to slide out by its own structure.
In the surface-mounted motor rotor according to the present embodiment, a structure having a clamping capability is disposed in the groove 11. The groove 11 clamps the permanent magnet 2 through a self structure, and the flying out of the motor during rotation is avoided. By the surface-mounted motor rotor according to the embodiment, no adhesive is needed, and the connection is more stable.
In one embodiment, the rotor body 1 comprises a plurality of punching sheets, and the punching sheets are laminated into the integrated rotor body 1. The punching sheet is in a ring shape, and a central round hole is formed in the middle of the punching sheet. The punching sheet edge is provided with a plurality of grooves 11, and the grooves 11 form a long-strip-shaped groove body after the punching sheet is laminated. When the permanent magnets 2 are mounted, they are inserted into the grooves from one side of the rotor body.
In one embodiment, as shown in fig. 2, convex structures 12 are provided on both sides of the groove 11, and concave structures 21 are provided on both sides of the permanent magnet 2. Wherein the concave structure 21 matches the shape of the convex structure 12, and the convex structure 12 fills the concave structure 21. In this way, when the rotor rotates, the permanent magnet 2 is fixed in the groove 11 due to the edge of the concave structure 21 catching the convex structure 12, thereby preventing the permanent magnet 2 from flying out.
In the surface-mount motor rotor according to the present embodiment, the protruding structure 12 is preferably a structure having a shape of ">", that is, the protruding structure 12 is a convex angle shape, and the recessed structure 21 is also a convex angle shape (as shown in fig. 2), so that the clamping is more stable. Of course, the convex structures 12 and the concave structures 21 may be curved (as shown in FIG. 3), stepped, or other shapes. It can be ensured that the permanent magnet 2 can be locked by the recess 11 as long as the most protruding position on the convex structure 12 of the recess 11, i.e. the narrowest position on both sides of the recess 11, is less than the width of the bottom of the permanent magnet 2.
In one embodiment, as shown in fig. 4, both sides of the groove 11 are provided with concave structures 13. The concave structure 13 is preferably a structure with a shape of ">", and can also be an arc shape or other shapes.
In a preferred embodiment, the permanent magnet 2 is provided with protruding structures 22 on both sides, which match the recessed structures 13. In this embodiment, as long as it is ensured that the width of the groove 11 at the side far away from the center of the punching sheet, that is, the outer ring side of the rotor body 1 is smaller than the width of the widest position of the permanent magnet 2, it can be ensured that the groove 11 can clamp the permanent magnet 2.
In a preferred embodiment, as shown in fig. 5, concave structures 21 are arranged on two sides of the permanent magnet 2, and clamping bodies 3 are arranged on two sides of the permanent magnet 2, and the clamping bodies 3 are filled and fixed between the concave structures 13 and the concave structures 21. In this embodiment, the two sides of the clamping body 3 are respectively provided with a protruding structure, and are respectively filled in the concave structure 13 of the groove 11 and the concave structure 21 of the permanent magnet 2. Thus, the concave structure 13 of the groove 11 can block the clamping body 3, and the clamping body 3 can block the permanent magnet 2. The groove 11 can also clamp the permanent magnet 2 through the clamping body 3, so that the permanent magnet 2 cannot slide out during working. In a preferred embodiment, the snap-in body 3 is wedge-shaped. The wedge shape in this embodiment is a diamond or a hexagon.
In one embodiment, as shown in fig. 6, the groove 11 is a dovetail groove, that is, the cross section of the groove 11 is a trapezoid, and the long side of the trapezoid is close to the center of the punching sheet. The section of the permanent magnet 2 is trapezoidal matched with the section of the groove 11. In this embodiment, the width of the outer side of the groove 11 is greater than the width of the inner side of the permanent magnet 2, so that the permanent magnet 2 can be stably fixed in the groove 11.
In one embodiment, as shown in fig. 7, a convex structure 12 and a concave structure 13 are respectively disposed at two sides of the groove 11. The two sides of the permanent magnet 2 are respectively provided with a concave structure 21 and a convex structure 22. The male structure 12 is filled in the female structure 21, and the male structure 22 is filled in the female structure 13. This also ensures that the permanent magnet 2 is fixed in the recess 11.
In one embodiment, a gap of a certain width is provided between the groove 11 and the permanent magnet 2. The permanent magnet 2 is smaller in size than the structure of the recess 11. The permanent magnet 2 may be disposed beyond the groove 11 as needed.
In a preferred embodiment, as shown in fig. 8, a positioning slot 14 is arranged at the bottom of the groove 11, and the width of the positioning slot 14 matches with the width of the bottom of the permanent magnet 2. This embodiment can guarantee through setting up positioning groove 14 permanent magnet 2 with recess 11 hookup location is confirmed, is convenient for the installation of permanent magnet 2, is also convenient for simultaneously the installation of the joint body 3.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A surface-mount electric motor rotor, comprising:
the rotor comprises an annular columnar rotor body (1), wherein a plurality of grooves (11) are formed in the circumferential direction of the rotor body (1);
the permanent magnets (2) are connected to the rotor body (1), and the permanent magnets (2) are arranged in the grooves (11);
wherein the groove (11) is configured to be able to catch the permanent magnet (2).
2. A surface-mounted electric motor rotor as claimed in claim 1, characterized in that said rotor body (1) comprises a plurality of laminations which are laminated and connected to form a unitary rotor body (1).
3. A surface-mounted electric motor rotor as claimed in claim 2, characterized in that both sides of the recess (11) are provided with protruding structures (12) and both sides of the permanent magnet (2) are provided with recessed structures (21) matching the shape of the protruding structures (12), the protruding structures (12) being filled in the recessed structures (21).
4. A surface-mounted electric motor rotor according to claim 2, characterized in that both sides of the groove (11) are provided with an indent (13).
5. A surface-mounted electric motor rotor as claimed in claim 4, characterized in that the permanent magnets (2) are provided on both sides with protruding structures (22) matching the shape of the recessed structures (13), the protruding structures being filled in the recessed structures (13).
6. A surface-mounted electric motor rotor as claimed in claim 4, characterized in that both sides of the permanent magnet (2) are provided with recessed structures (21), both sides of the permanent magnet (2) are provided with snap bodies (3), and the snap bodies (3) are filled between the recessed structures (13) and the recessed structures (21).
7. A surface-mounted electric motor rotor as claimed in claim 6, characterized in that the cross-section of the snap-in body (3) is wedge-shaped.
8. The surface-mounted motor rotor as recited in claim 2, characterized in that the cross section of the groove (11) is trapezoidal, and the long side of the trapezoid is close to the center of the punching sheet; the section of the permanent magnet (2) is trapezoidal matched with the section of the groove (11).
9. A surface-mounted electric machine rotor according to any one of claims 1 to 8, characterized in that there is a certain gap between the groove (11) and the edge of the permanent magnet (2).
10. A surface-mounted electric motor rotor as claimed in claim 9, characterized in that the bottom of the recess (11) is provided with a detent (14), the width of the detent (14) matching the width of the bottom of the permanent magnet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136698.2A CN111614174A (en) | 2019-02-25 | 2019-02-25 | Surface-mounted motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910136698.2A CN111614174A (en) | 2019-02-25 | 2019-02-25 | Surface-mounted motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111614174A true CN111614174A (en) | 2020-09-01 |
Family
ID=72201937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910136698.2A Pending CN111614174A (en) | 2019-02-25 | 2019-02-25 | Surface-mounted motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111614174A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150044537A (en) * | 2013-10-17 | 2015-04-27 | 주식회사 만도 | Motor |
| CN206004431U (en) * | 2016-07-30 | 2017-03-08 | 上海度哥驱动设备有限公司 | A kind of non-uniform gap durface mounted permanent magnet synchronous motor structure |
| CN107332378A (en) * | 2017-08-25 | 2017-11-07 | 苏州德迈科电机技术有限公司 | Permanent magnet synchronous servo motor rotor magnetic steel Surface Mount fixed structure |
| CN107689697A (en) * | 2017-09-29 | 2018-02-13 | 深圳市大地和电气股份有限公司 | Brshless DC motor |
-
2019
- 2019-02-25 CN CN201910136698.2A patent/CN111614174A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150044537A (en) * | 2013-10-17 | 2015-04-27 | 주식회사 만도 | Motor |
| CN206004431U (en) * | 2016-07-30 | 2017-03-08 | 上海度哥驱动设备有限公司 | A kind of non-uniform gap durface mounted permanent magnet synchronous motor structure |
| CN107332378A (en) * | 2017-08-25 | 2017-11-07 | 苏州德迈科电机技术有限公司 | Permanent magnet synchronous servo motor rotor magnetic steel Surface Mount fixed structure |
| CN107689697A (en) * | 2017-09-29 | 2018-02-13 | 深圳市大地和电气股份有限公司 | Brshless DC motor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200901 |
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| RJ01 | Rejection of invention patent application after publication |