CN217183074U - External rotor motor - Google Patents
External rotor motor Download PDFInfo
- Publication number
- CN217183074U CN217183074U CN202220319711.5U CN202220319711U CN217183074U CN 217183074 U CN217183074 U CN 217183074U CN 202220319711 U CN202220319711 U CN 202220319711U CN 217183074 U CN217183074 U CN 217183074U
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- Prior art keywords
- groove
- shaft sleeve
- external rotor
- shaft
- fixed
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Abstract
The utility model provides an external rotor motor, which comprises a front cover, wherein a groove is arranged at the central position of the front cover; the groove is internally provided with a shaft sleeve which is clamped and hidden in the groove. The diameter of the through hole at the bottom of the groove is set, so that the end part of the shaft sleeve becomes a reference surface, the end part of the shaft sleeve is more convenient to process, the processing precision is higher, and the coaxiality of the fixed shaft and the rotor is improved; the shaft sleeve is hidden in the groove, so that the radial position of the shaft sleeve is fixed, and the fixed shaft cannot generate radial displacement.
Description
Technical Field
The utility model relates to the technical field of electric machines, specifically an external rotor electric machine.
Background
The outer rotor motor is a motor having a structure in which a stator is provided inside and a rotor is provided outside. The lead wire of the outer rotor motor is generally led out from a fixed shaft, and may be in the form of single-phase ac, three-phase ac, dc, or the like. Has the characteristics of space saving, compact design and attractive appearance. The cooling device is suitable for being installed in the impeller and has the best cooling effect. No V-belts, additional tension belts or other equipment is required.
The fixed shaft penetrates through the motor shell, and two ends of the fixed shaft are fixed, so that the outer rotor is rotatably connected. The cover plate is generally inserted with a shaft sleeve at the center, and the shaft sleeve is sleeved with a fixed shaft to realize the sealing of the fixed shaft. The end part of the inner end of the shaft sleeve is used as a reference, so that the axial positioning of the fixed shaft is realized, and the fixed shaft and the rotor are coaxial. The end part of the inner end of the shaft sleeve is difficult to machine, so that the precision is low; and the part of the shaft sleeve positioned at the outer side of the cover plate is not radially limited, so that the fixed shaft can radially move, and the performance of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem in the background art, the utility model discloses an external rotor electric machine.
The utility model provides an external rotor motor, which comprises a front cover, wherein a groove is arranged at the central position of the front cover;
the groove is internally provided with a shaft sleeve which is clamped and hidden in the groove.
The diameter of the through hole at the bottom of the groove is set, so that the end part of the shaft sleeve becomes a reference surface, the end part of the shaft sleeve is more convenient to process, the processing precision is higher, and the coaxiality of the fixed shaft and the rotor is improved; the shaft sleeve is hidden in the groove, so that the radial position of the shaft sleeve is fixed, and the fixed shaft cannot generate radial displacement.
For explaining the specific structure of the groove, in the scheme, the groove is provided with a first step and a second step which are connected with each other, and the shaft sleeve is T-shaped and is respectively clamped with the first step and the second step.
Further, the shaft sleeve is formed by die casting. So set up, the laminating degree of axle sleeve and recess is higher.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. a front cover; 2. a shaft sleeve; 3. a first step; 4. a second step.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The first embodiment is as follows:
as shown in fig. 1, the utility model relates to an external rotor motor, including interconnect's protecgulum 1 and casing, the casing outside is equipped with the annular groove for joint rotor.
The central position of the front cover 1 is provided with a groove, the groove is internally provided with a shaft sleeve 2, and the shaft sleeve 2 is clamped and hidden in the groove.
The recess is equipped with interconnect's first step 3 and second step 4, and axle sleeve 2 is T shape, first step 3 of joint and second step 4 respectively.
The diameter of the through hole at the bottom of the groove is set, so that the end part of the shaft sleeve 2 becomes a reference surface, the end part of the shaft sleeve 2 is more conveniently processed, the processing precision is higher, and the coaxiality of the fixed shaft and the rotor is improved; the shaft sleeve 2 is hidden in the groove, so that the radial position of the shaft sleeve 2 is fixed, and the fixed shaft cannot generate radial displacement.
Example two:
compared with the first embodiment, the differences are as follows: the sleeve 2 is formed by die casting. So set up, the laminating degree of axle sleeve 2 and recess is higher.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. An external rotor electric machine characterized in that: the device comprises a front cover (1), wherein a groove is formed in the center of the front cover (1);
the groove is internally provided with a shaft sleeve (2), and the shaft sleeve (2) is clamped and hidden in the groove.
2. The external rotor electric machine according to claim 1, wherein: the recess is equipped with interconnect's first step (3) and second step (4), axle sleeve (2) are T shape, joint respectively first step (3) and second step (4).
3. The external rotor electric machine according to claim 1, wherein: the shaft sleeve (2) is formed by die casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220319711.5U CN217183074U (en) | 2022-02-16 | 2022-02-16 | External rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220319711.5U CN217183074U (en) | 2022-02-16 | 2022-02-16 | External rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217183074U true CN217183074U (en) | 2022-08-12 |
Family
ID=82738529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220319711.5U Active CN217183074U (en) | 2022-02-16 | 2022-02-16 | External rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217183074U (en) |
-
2022
- 2022-02-16 CN CN202220319711.5U patent/CN217183074U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |