CN215186123U - Rotor yoke for external rotor motor - Google Patents
Rotor yoke for external rotor motor Download PDFInfo
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- CN215186123U CN215186123U CN202121135445.2U CN202121135445U CN215186123U CN 215186123 U CN215186123 U CN 215186123U CN 202121135445 U CN202121135445 U CN 202121135445U CN 215186123 U CN215186123 U CN 215186123U
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Abstract
The utility model discloses an external rotor motor is with rotor yoke, include yoke body (1) that forms by the thin slice edge rolling, yoke body (1) forms multilayer annular layer (2) after the edge rolling, connects gradually between multilayer annular layer (2), laminates each other between adjacent annular layer (2). The utility model discloses can have low in production cost and the good characteristics of processing stability simultaneously.
Description
Technical Field
The utility model relates to a motor rotor yoke, especially a rotor yoke for external rotor motor.
Background
The rotor yoke is a part constituting a flux linkage path of the motor, and functions to fix magnetic poles and generate rotational inertia. The traditional rotor magnetic yoke is an outer rotor motor which is mainly formed by stamping a stamping part to form an integrated ring and then used for surface-mounting magnetic shoes, and is characterized by high processing efficiency, convenient roundness control and higher cost. The outer rotor magnetic yoke used for injection molding is punched and spliced to form a plurality of circular arc pieces respectively, and then the circular arc pieces are connected end to end through dovetail grooves to form an annular structure; although this structure can improve the utilization of raw materials as compared with the above one, the processing efficiency is relatively low. In order to reduce the cost and improve the processing efficiency, manufacturers punch the A3 material into sheets and then weld the sheets by rolling, and although the cost and the processing efficiency are improved, the magnetic yoke has higher control difficulty and lower roundness in the rolling process, so that the magnetic shoe is difficult to put into a die during subsequent injection molding, and the processing stability is poor. Therefore, the existing rotor magnetic yoke cannot have the characteristics of low production cost and good processing stability at the same time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an external rotor motor is with rotor yoke. The method has the characteristics of low production cost and good processing stability.
The technical scheme of the utility model: the utility model provides an outer rotor motor is with rotor yoke, includes the yoke body that forms by the thin slice edge rolling, and the yoke body forms multilayer annular layer after the edge rolling, connects gradually between the multilayer annular layer, laminates each other between the adjacent annular layer.
In the rotor yoke for the outer rotor motor, the sheet is made of a magnetic conductive material.
In the rotor yoke for the outer rotor motor, the thickness of the sheet is 0.2-1 mm.
In the rotor yoke for the outer rotor motor, the adjacent annular layers are connected with each other through the connecting part, the connecting part is provided with the S-shaped bending surface, and the connecting parts among the plurality of annular layers are arranged side by side along the radial direction.
In the rotor yoke for the outer rotor motor, both ends of the sheet are located at the bending surfaces of the adjacent connecting portions along the circumferential direction.
Compared with the prior art, the utility model discloses reach the required thickness size of rotor yoke with the thin slice of magnetic material through the multilayer edge rolling, because the thickness of thin slice can reduce the control degree of difficulty of edge rolling technology after reducing, make it compare direct edge rolling welded forming's yoke structure can improve the circularity of rotor yoke after the shaping, thereby improve the processing stability of the utility model; meanwhile, the utilization rate of raw materials is higher by utilizing the structure of forming the rotor magnetic yoke by using the multilayer thin sheet edge rolling compared with a direct punch forming mode, the yield can be higher than that of a magnetic yoke structure formed by welding the edge rolling, and the control precision requirement required by the magnetic yoke during edge rolling is reduced, so that the production cost of the utility model is effectively reduced; the thin slice still has circularity elasticity after the edge rolling, makes it can compensate the space at the follow-up in-process of moulding plastics, is convenient for mould plastics, further improves the utility model discloses a processing stability.
Furthermore, the utility model discloses make each annular layer connect gradually through connecting portion when the edge rolling, can make and have excellent concentricity between each annular layer to improve the circularity of rotor yoke after the shaping. Therefore, the utility model discloses can have low in production cost and the good characteristics of processing stability simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is an enlarged view of fig. 1 from a.
The labels in the figures are: 1-magnetic yoke body, 2-annular layer, 3-connecting part, 4-bending surface.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. A rotor magnetic yoke for an outer rotor motor is shown in figure 1 and comprises a magnetic yoke body 1 formed by sheet rolling, wherein the magnetic yoke body 1 forms a plurality of annular layers 2 after rolling, the plurality of annular layers 2 are sequentially connected, and the side walls of the adjacent annular layers 2 are completely attached.
The sheet is made of magnetic conductive materials such as silicon steel sheets or carbon steel Sheets (SPCC).
The thickness of the sheet was 0.5 mm.
The adjacent annular layers 2 are connected with each other through the connecting part 3, the connecting part 3 is provided with an S-shaped bending surface 4, and the connecting parts 3 among the plurality of annular layers 2 are arranged side by side along the radial direction.
The two ends of the thin sheet are circumferentially positioned at the bending surfaces 4 of the adjacent connecting parts 3.
The utility model discloses a theory of operation: the utility model discloses add man-hour, earlier through the thin slice of punching press formation silicon steel or carbon steel material, then carry out the edge rolling to the thin slice to increase yoke body 1 through the edge rolling number of piles reaches corresponding thickness size. In the process of rolling the sheet, the sheet is extended outwards through the connecting part 3 after the annular layer 2 is formed by rolling, so that the roundness and the concentricity of each annular layer 2 can be kept, the annular layers 2 are mutually attached, and the forming effect of the magnetic yoke body 1 is improved.
Claims (5)
1. The utility model provides an outer rotor motor is with rotor yoke which characterized in that: the magnetic yoke comprises a magnetic yoke body (1) formed by sheet rolling, wherein the magnetic yoke body (1) forms a plurality of annular layers (2) after rolling, the plurality of annular layers (2) are sequentially connected, and adjacent annular layers (2) are mutually attached.
2. The rotor yoke for an external rotor motor according to claim 1, wherein: the thin sheet is made of a magnetic conductive material.
3. The rotor yoke for an external rotor motor according to claim 1, wherein: the thickness of the thin sheet is 0.2-1 mm.
4. The rotor yoke for an external rotor motor according to claim 1, wherein: the adjacent annular layers (2) are connected with each other through the connecting part (3), the connecting part (3) is provided with an S-shaped bending surface (4), and the connecting parts (3) among the plurality of annular layers (2) are arranged side by side along the radial direction.
5. The rotor yoke for an external rotor motor according to claim 1, wherein: and two ends of the thin sheet are positioned at the bending surfaces (4) of the adjacent connecting parts (3) along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121135445.2U CN215186123U (en) | 2021-05-25 | 2021-05-25 | Rotor yoke for external rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121135445.2U CN215186123U (en) | 2021-05-25 | 2021-05-25 | Rotor yoke for external rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215186123U true CN215186123U (en) | 2021-12-14 |
Family
ID=79375684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121135445.2U Active CN215186123U (en) | 2021-05-25 | 2021-05-25 | Rotor yoke for external rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215186123U (en) |
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2021
- 2021-05-25 CN CN202121135445.2U patent/CN215186123U/en active Active
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