CN210518019U - External rotor motor using multi-groove rotor - Google Patents
External rotor motor using multi-groove rotor Download PDFInfo
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- CN210518019U CN210518019U CN201921723031.4U CN201921723031U CN210518019U CN 210518019 U CN210518019 U CN 210518019U CN 201921723031 U CN201921723031 U CN 201921723031U CN 210518019 U CN210518019 U CN 210518019U
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- rotor
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- heat dissipation
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Abstract
The utility model discloses an external rotor motor using a multi-groove rotor, which comprises a first bearing, a second bearing and a motor shaft; the first bearing and the second bearing are respectively sleeved at two ends of the motor shaft, and a stator is further sleeved on the motor shaft between the first bearing and the second bearing; the outer side of the stator is sleeved with a multi-groove rotor; the upper end of the multi-groove rotor is provided with a fan blade, and the multi-groove rotor is fixedly connected with the motor shaft through the fan blade; a bearing seat is arranged on the outer side of the first bearing; the bearing seat is fixedly connected with the stator and used for fixing the stator; the multi-groove rotor is formed by stacking a plurality of rotor steel sheets; a plurality of fixed slots are formed in the outer edge of the rotor steel sheet, and fastening pieces are arranged in the fixed slots. The utility model discloses can increase the area of contact with the air, play positive radiating effect, effectively prevent the overheated magnet demagnetization that leads to of motor, have the promotion effect that is showing to the power of motor. And the heat dissipation groove arranged on the inner edge also has the function of breaking magnetism, so that the magnetic force is increased, and the power of the motor is improved.
Description
Technical Field
The utility model relates to an external rotor electric machine especially relates to an external rotor electric machine who uses multislot rotor.
Background
The outer rotor motor is one kind of motor and features that the outer casing rotates as the rotor and the inner stator is fixed. It is often applied to electric appliances such as fans. However, in the prior art, the external rotor motor is poor in heat dissipation performance during working, high temperature is easily generated, and the magnetism of the permanent magnet inside the motor is easily demagnetized, so that the power of the external rotor motor is insufficient.
To above problem, the utility model discloses research manufacturing.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides an external rotor motor using a multi-groove rotor.
In order to solve the technical problem, the utility model discloses a technical scheme is: an outer rotor motor applying a multi-groove rotor comprises a first bearing, a second bearing and a motor shaft; the first bearing and the second bearing are respectively sleeved at two ends of the motor shaft, and a stator is further sleeved on the motor shaft between the first bearing and the second bearing; the outer side of the stator is sleeved with a multi-groove rotor; the upper end of the multi-groove rotor is provided with a fan blade, and the multi-groove rotor is fixedly connected with the motor shaft through the fan blade;
a bearing seat is arranged on the outer side of the first bearing; the bearing seat is fixedly connected with the stator and used for fixing the stator;
the multi-groove rotor is formed by stacking a plurality of rotor steel sheets; the outer edge of the rotor steel sheet is provided with a plurality of fixing grooves, and buckling sheets are arranged in the fixing grooves and used for clamping and fixing a plurality of stacked rotor steel sheets together; and a plurality of heat dissipation grooves are formed in the rotor steel sheet.
Further, the heat dissipation groove is positioned at the outer edge of the rotor steel sheet; the bottom surface of the heat dissipation groove is a plane and the side surface is an arc surface, or the bottom surface is a plane and the side surface is an inclined surface, or the bottom surface is an arc surface and the side surface is an arc surface, or the bottom surface and the side surface are concentric arcs, or the side surface is an inclined surface and the cross section of the heat dissipation groove is V-shaped, or the side surface is an inclined surface and the cross section of the heat dissipation groove is W-shaped.
Furthermore, the heat dissipation groove is positioned at the inner edge of the rotor steel sheet; the bottom surface of the heat dissipation groove is a plane and the side surface is an arc surface, or the bottom surface is a plane and the side surface is an inclined surface, or the bottom surface is an arc surface and the side surface is an arc surface, or the bottom surface and the side surface are concentric arcs, or the side surface is an inclined surface and the cross section of the heat dissipation groove is V-shaped, or the side surface is an inclined surface and the cross section of the heat dissipation groove is W-shaped.
Further, the first bearing comprises an outer ring, an inner ring and balls; the ball clamp is arranged between the outer ring and the inner ring; the outer ring is fixedly connected with the bearing seat; the inner ring is sleeved on the motor shaft.
The utility model discloses can increase the area of contact with the air, play positive radiating effect, effectively prevent the overheated magnet demagnetization that leads to of motor, have the promotion effect that is showing to the power of motor. And the heat dissipation groove arranged on the inner edge also has the function of breaking magnetism, so that the magnetic force is increased, and the power of the motor is improved.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a structural schematic diagram of a rotor steel sheet.
FIG. 3 is a schematic cross-sectional view of a first heat sink.
FIG. 4 is a cross-sectional view of a second heat sink.
FIG. 5 is a cross-sectional view of a third heat sink.
FIG. 6 is a cross-sectional view of a fourth heat sink.
FIG. 7 is a schematic cross-sectional view of a fifth heat sink.
FIG. 8 is a schematic cross-sectional view of a sixth heat sink.
1. A first bearing; 2. a bearing seat; 3. a motor shaft; 4. a stator; 5. a rotor; 6. a fan blade; 7. a second bearing; 51. fixing grooves; 52. a heat dissipation groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
An external rotor motor using a multi-slot rotor is shown in fig. 1, and comprises a first bearing 1, a second bearing 7 and a motor shaft 3; the first bearing and the second bearing are respectively sleeved at two ends of the motor shaft and are used for bearing the rotation of the motor shaft. A stator 4 is sleeved on the motor shaft between the first bearing and the second bearing; the outer side of the stator is sleeved with a multi-groove rotor 5; the upper end of the multi-groove rotor 5 is provided with a fan blade 6, and the multi-groove rotor is fixedly connected with the motor shaft through the fan blade, so that the rotor can drive the fan blade and the motor shaft to rotate when rotating. Because the stator is sleeved on the motor shaft instead of being directly fixed with the motor shaft, the stator cannot be driven to rotate when the motor shaft rotates, and the stator is ensured to be stable and immobile.
A bearing seat 2 is arranged on the outer side of the first bearing 1; the bearing seat is fixedly connected with the stator and used for fixing the stator, so that the stator cannot fall off from the motor shaft.
The first bearing 1 comprises an outer ring, an inner ring and balls; the ball clamp is arranged between the outer ring and the inner ring, so that the outer ring and the inner ring can move relatively. The outer ring is fixedly connected with the bearing seat; the inner ring is sleeved on the motor shaft. The bearing seat can receive the stator and the motor shaft without hindering the relative movement between the stator and the motor shaft.
The multi-slot rotor 5 is formed by stacking a plurality of rotor steel sheets; as shown in fig. 2, a plurality of fixing grooves 51 are formed in the outer edge of the rotor steel sheet, and fastening pieces are arranged in the fixing grooves and used for fastening and fixing a plurality of stacked rotor steel sheets together; the rotor steel plate is also provided with a plurality of heat dissipation grooves 52.
The heat dissipation grooves 52 may be located on the outer edge of the rotor steel sheet alone or on the inner edge of the rotor steel sheet alone or on both the outer edge and the inner edge of the rotor steel sheet.
The heat sink has various shapes, and specifically includes a plane bottom surface and an arc side surface, as shown in fig. 3. Or the bottom surface is a plane and the side surface is a slope, as shown in fig. 4. Or the bottom surface is an arc surface and the side surface is an arc surface, as shown in fig. 5. Or the bottom surface and the side surface are in concentric arcs, as shown in fig. 6. Or the side surface is an inclined surface and the section of the heat dissipation groove is V-shaped, as shown in figure 7. Or the side surface is an inclined surface and the section of the heat dissipation groove is W-shaped, as shown in figure 8.
The external rotor motor using the multi-groove rotor can be applied to hand-held electric tools, and the hand-held electric tools comprise machines such as an AC/DC brushless electric hammer, an electric pick, an electric grinder, an electric planer, an airplane drill, a concrete vibrator, an angle grinder, a stirrer, an aluminum sawing machine, a wall grinder, a water drill, a brushless wrench, a brushless blower, a profile cutting machine, a marble machine and the like.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides an use external rotor electric machine of multislot rotor which characterized in that: the motor comprises a first bearing (1), a second bearing (7) and a motor shaft (3); the first bearing and the second bearing are respectively sleeved at two ends of the motor shaft, and a stator (4) is further sleeved on the motor shaft between the first bearing and the second bearing; a multi-groove rotor (5) is sleeved on the outer side of the stator; the upper end of the multi-groove rotor (5) is provided with a fan blade (6), and the multi-groove rotor is fixedly connected with the motor shaft through the fan blade;
a bearing seat (2) is arranged on the outer side of the first bearing (1); the bearing seat is fixedly connected with the stator and used for fixing the stator;
the multi-groove rotor (5) is formed by stacking a plurality of rotor steel sheets; the outer edge of the rotor steel sheet is provided with a plurality of fixing grooves (51), buckling pieces are arranged in the fixing grooves, and the buckling pieces clamp and fix a plurality of stacked rotor steel sheets together; and a plurality of heat dissipation grooves (52) are also formed in the rotor steel sheet.
2. The external rotor electric machine using multi-slot rotor as claimed in claim 1, wherein: the heat dissipation groove (52) is positioned at the outer edge of the rotor steel sheet; the bottom surface of the heat dissipation groove is a plane and the side surface is an arc surface, or the bottom surface is a plane and the side surface is an inclined surface, or the bottom surface is an arc surface and the side surface is an arc surface, or the bottom surface and the side surface are concentric arcs, or the side surface is an inclined surface and the cross section of the heat dissipation groove is V-shaped, or the side surface is an inclined surface and the cross section of the heat dissipation groove is W-shaped.
3. The external rotor electric machine using multi-slot rotor as claimed in claim 1, wherein: the heat dissipation groove is positioned at the inner edge of the rotor steel sheet; the bottom surface of the heat dissipation groove is a plane and the side surface is an arc surface, or the bottom surface is a plane and the side surface is an inclined surface, or the bottom surface is an arc surface and the side surface is an arc surface, or the bottom surface and the side surface are concentric arcs, or the side surface is an inclined surface and the cross section of the heat dissipation groove is V-shaped, or the side surface is an inclined surface and the cross section of the heat dissipation groove is W-shaped.
4. The external rotor motor using a multi-slot rotor according to claim 2 or 3, wherein: the first bearing (1) comprises an outer ring, an inner ring and balls; the ball clamp is arranged between the outer ring and the inner ring; the outer ring is fixedly connected with the bearing seat; the inner ring is sleeved on the motor shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723031.4U CN210518019U (en) | 2019-10-15 | 2019-10-15 | External rotor motor using multi-groove rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723031.4U CN210518019U (en) | 2019-10-15 | 2019-10-15 | External rotor motor using multi-groove rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210518019U true CN210518019U (en) | 2020-05-12 |
Family
ID=70572937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921723031.4U Active CN210518019U (en) | 2019-10-15 | 2019-10-15 | External rotor motor using multi-groove rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210518019U (en) |
-
2019
- 2019-10-15 CN CN201921723031.4U patent/CN210518019U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 226100 No.88 tieanchor Road, Binhai New Area, Haimen City, Nantong City, Jiangsu Province Patentee after: Jiangsu anchor Tools Co.,Ltd. Address before: 226100 No.88 tieanchor Road, Binhai New Area, Haimen City, Nantong City, Jiangsu Province Patentee before: JIANGSU ANCHOR TOOLS Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230801 Address after: 226100 Room 10, No. 88 Tiebao Road, Baochang Town, Haimen District, Nantong City, Jiangsu Province Patentee after: Jiangsu Tengya Iron Anchor Tool Co.,Ltd. Address before: 226100 No.88 tieanchor Road, Binhai New Area, Haimen City, Nantong City, Jiangsu Province Patentee before: Jiangsu anchor Tools Co.,Ltd. |
|
| TR01 | Transfer of patent right |