CN218387061U - External rotor motor - Google Patents
External rotor motor Download PDFInfo
- Publication number
- CN218387061U CN218387061U CN202222182109.4U CN202222182109U CN218387061U CN 218387061 U CN218387061 U CN 218387061U CN 202222182109 U CN202222182109 U CN 202222182109U CN 218387061 U CN218387061 U CN 218387061U
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- Prior art keywords
- bearing
- motor
- transmission shaft
- stator
- end cover
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- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 magnetic Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
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- Motor Or Generator Frames (AREA)
Abstract
The utility model relates to an external rotor motor, which comprises a motor main body, wherein the motor main body comprises a transmission shaft which runs through the whole structure, and the transmission shaft is provided with an installation bearing; the large-size bearing is arranged at the output end of the extending transmission shaft, the bearing is arranged by means of a fixed support of a customer body to be installed, a nested bearing in the motor only plays a role of auxiliary support, the front bearing is arranged on an external support, namely, the front bearing and the front bearing are equivalently arranged by means of the fixed bearing, a cantilever structure can be completely eliminated, the phase change is opposite to the protection of the internal bearing, and when the loss of the internal bearing is reduced, the service life of the motor can be greatly prolonged; secondly, the installation mode can be adjusted according to the actual requirement, and is not limited to the size of the inner hole of the stator.
Description
Technical Field
The utility model relates to a brushless motor, in particular to external rotor electric machine.
Background
Common motor types include dc motors and brushless motors; the brushless motor comprises an inner rotor brushless motor and an outer rotor brushless motor, the inner rotor brushless motor is similar to the outer rotor brushless motor in structure, the inner rotor brushless motor is a motor with a stator outside and a rotor inside, and the outer rotor brushless motor is a brushless motor with a stator inside and a rotor outside.
In the motors with the same size, the diameter of the rotor of the outer rotor motor is larger than that of the inner rotor motor, and because the torque is in direct proportion to the axial length of the motor, and the outer rotor motor can generate larger torque under the low-speed rotation, the rotary inertia of the outer rotor motor is larger, and the motor is suitable for the scenes of stable-speed operation, such as a winch for mines, a motor for an electric fan and the like; as shown in fig. 1, a conventional external rotor motor in the prior art includes a rotating shaft, a rotor 201 and a stator, an output end of the motor is a mounting end, and an embedded rear bearing 301 connected to the rotor 201, such a structure causes the whole electronic rotor to be in a cantilever state, and in a high-strength working state, the embedded rear bearing 301 is very prone to failure, so that the service life of the motor is reduced, and the usage amount of expensive rare earth materials used for manufacturing a brushless motor, such as rubidium, magnetic, boron (NdFeB) and other permanent magnet materials, is increased, which wastes raw materials and increases cost.
Therefore, an outer rotor motor is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an external rotor electric machine.
The above technical purpose of the present invention can be achieved by the following technical solutions: the outer rotor motor comprises a motor main body, wherein the motor main body comprises a transmission shaft penetrating through the whole structure, and a mounting bearing is arranged on the transmission shaft.
By adopting the technical scheme, the large-size bearing is arranged at the extended output end of the transmission shaft, the bearing is arranged by means of the integral fixed support of a client to be installed, the nested bearing in the motor only plays a role of auxiliary support, the front bearing is arranged on the external support, namely, the front bearing and the front bearing are equivalently arranged by means of the fixed bearing, the cantilever structure can be completely eliminated, the phase-change is opposite to the protection of the internal bearing, and when the loss of the internal bearing is reduced, the service life of the motor can be greatly prolonged; secondly, the installation mode can be adjusted according to the actual requirement, and is not limited to the size of the inner hole of the stator.
Preferably, the motor main body further comprises a front end cover, a rotor sleeve and a rear end cover, the rotor sleeve surrounds the transmission shaft and is matched with the front end cover and the rear end cover to form an accommodating cavity, the transmission shaft penetrates through the accommodating cavity to form an output shaft, and the mounting bearing is arranged on the output shaft.
Preferably, the transmission shaft is coaxially sleeved with a nested bearing.
Preferably, the transmission shaft is coaxially sleeved with a front bearing.
Preferably, the rear end cover is provided with a stator fixing frame in an extending manner, and the stator fixing frame is connected to the nested bearing and the front bearing; and a stator cavity for accommodating the stator is formed between the stator fixing frame and the rotor sleeve.
To sum up, the utility model discloses following beneficial effect has:
1. the installation mode of the brushless motor in the prior art is changed, and the installation of a cantilever is eliminated;
2. the output end of the outer rotor motor can be protected to a certain extent while the cantilever is eliminated, and the output end in the prior art is at the fixed end of the stator, but is at the rotor end in the application;
3. the multi-bearings break through the size limitation of the inner hole of the stator, and the size can be adjusted according to actual use;
4. during installation, the motor can be installed by means of a client complete machine without increasing the size and cost of the motor;
5. after the structure is changed, the service life of the motor is obviously prolonged.
Drawings
FIG. 1 is a schematic diagram of a prior art structure in the background art;
FIG. 2 is a side view of the overall structure in the embodiment;
fig. 3 is a sectional view of the entire structure in the embodiment.
In the figure, 1, a motor main body; 11. a drive shaft; 12. nesting the bearings; 13. a front bearing; 14. a front end cover; 15. a rear end cap; 151. a stator fixing frame; 152. a stator cavity; 16. an accommodating chamber; 17. an output shaft; 2. mounting a bearing; 201. a rotor; 301. a rear bearing is embedded; 401. a front bearing.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Example (b):
an outer rotor motor, as shown in fig. 2 and 3, comprises a motor body 1, wherein the motor body 1 comprises a transmission shaft 11 penetrating through an integral structure, and a mounting bearing 2 is arranged on the transmission shaft 11.
As shown in fig. 2 and 3, the motor body 1 further includes a front end cover 14, a rotor sleeve 18 and a rear end cover 15, the rotor sleeve 18 surrounds the transmission shaft 11 and cooperates with the front end cover 14 and the rear end cover 15 to form an accommodating cavity 16, the transmission shaft 11 passes through the accommodating cavity 16 to form an output shaft 17, and the mounting bearing 2 is disposed on the output shaft 17.
As shown in fig. 2 and 3, a nested bearing 12 is coaxially sleeved on the transmission shaft 11.
As shown in fig. 2 and 3, the transmission shaft 11 is coaxially sleeved with a front bearing 13.
As shown in fig. 2 and 3, a stator fixing frame 151 extends from the rear end cover 15, and the stator fixing frame 151 is connected to the nested bearing 12 and the front bearing 13; a stator cavity 152 for accommodating the stator is formed between the stator holder 151 and the rotor sleeve 18.
The working principle is as follows:
the large-size bearing is arranged at the extended output end of the transmission shaft, the bearing is arranged by means of a fixed support of a customer to be installed, a nested bearing in the motor only plays a role of auxiliary support, the front bearing is arranged on an external support, namely, the front bearing and the front bearing are arranged equivalently, a cantilever structure can be completely eliminated, the phase change is relative to the protection of the internal bearing, and when the loss of the internal bearing is reduced, the service life of the motor can be greatly prolonged; secondly, the installation mode can be adjusted according to the actual requirement, and is not limited to the size of the inner hole of the stator.
Claims (5)
1. The utility model provides an external rotor motor, includes motor body (1), motor body (1) is including running through transmission shaft (11) that overall structure set up, its characterized in that: and the transmission shaft (11) is provided with a mounting bearing (2).
2. The external rotor electric machine according to claim 1, wherein: the motor body (1) further comprises a front end cover (14), a rotor sleeve (18) and a rear end cover (15), the rotor sleeve (18) surrounds the transmission shaft (11) and is matched with the front end cover (14) and the rear end cover (15) to form an accommodating cavity (16), the transmission shaft (11) penetrates through the accommodating cavity (16) to form an output shaft (17), and the mounting bearing (2) is arranged on the output shaft (17).
3. The external rotor electric machine according to claim 2, wherein: the transmission shaft (11) is coaxially sleeved with a nested bearing (12).
4. The external rotor electric machine according to claim 3, wherein: the transmission shaft (11) is coaxially sleeved with a front bearing (13).
5. The external rotor electric machine according to claim 4, wherein: a stator fixing frame (151) extends from the rear end cover (15), and the stator fixing frame (151) is connected to the nested bearing (12) and the front bearing (13); a stator cavity (152) for accommodating the stator is formed between the stator fixing frame (151) and the rotor sleeve (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222182109.4U CN218387061U (en) | 2022-08-19 | 2022-08-19 | External rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222182109.4U CN218387061U (en) | 2022-08-19 | 2022-08-19 | External rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218387061U true CN218387061U (en) | 2023-01-24 |
Family
ID=84968089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222182109.4U Active CN218387061U (en) | 2022-08-19 | 2022-08-19 | External rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218387061U (en) |
-
2022
- 2022-08-19 CN CN202222182109.4U patent/CN218387061U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |