CN216699696U - External rotor direct current brushless motor convenient to heat dissipation - Google Patents
External rotor direct current brushless motor convenient to heat dissipation Download PDFInfo
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- CN216699696U CN216699696U CN202122398812.4U CN202122398812U CN216699696U CN 216699696 U CN216699696 U CN 216699696U CN 202122398812 U CN202122398812 U CN 202122398812U CN 216699696 U CN216699696 U CN 216699696U
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- motor
- heat dissipation
- rotor
- shaft
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Abstract
The utility model discloses an external rotor brushless DC motor convenient for heat dissipation, which comprises: stator assembly and rotor subassembly, stator assembly includes: a stator support and a stator core; the rotor assembly includes: the rotor shaft, the end cover and the motor shell; the rotor shaft passes through the stator support and is installed in the stator support, and the magnet is fixed on the inner wall of the motor shell and covers the outside of the stator core. The end cap includes: the heat sink comprises a central plate, an edge plate and a plurality of heat dissipation blades fixedly connected with the central plate and the edge plate, wherein the heat dissipation blades are obliquely arranged relative to the plane of the central plate. The end cover is one part of the rotor component, when the motor works, the end cover rotates, the obliquely arranged radiating blades accelerate the flow of air, the air enters or flows out of the interior of the motor shell in an accelerating mode, and a gap between the stator support and the motor shell is an air inlet/outlet port, so that the air circulation speed is increased, and the heat dissipation inside the motor is facilitated.
Description
Technical Field
The utility model relates to the technical field of outer rotor direct current brushless motors, in particular to an outer rotor direct current brushless motor convenient for heat dissipation.
Background
The outer rotor motor has the advantages of large rotational inertia, simple maintenance, convenience in heat dissipation and the like, and is widely applied to various products.
However, in the existing external rotor motor, the external rotor motor is only in an open state between the motor shell and the stator core, the structure of the connection part of the motor shell, the end cover and the rotor shaft is relatively closed, and the circulation of ambient air and the air inside the motor is not smooth, so that the problems of overheating of the motor and damage of internal components are easily caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of poor heat dissipation performance of a motor in the prior art, the utility model provides an outer rotor direct current brushless motor with good heat dissipation performance and convenience in heat dissipation.
The utility model is realized by the following technical scheme:
an external rotor brushless dc motor facilitating heat dissipation, comprising: a stator assembly and a rotor assembly, the stator assembly comprising: a stator bracket and a stator core mounted on the stator bracket; the rotor assembly includes: the motor comprises a rotor shaft arranged on the stator support, an end cover fixed at one end of the rotor shaft and a motor shell fixed on the end cover;
a shaft cavity is formed in the middle of the stator support, the rotor shaft penetrates through the shaft cavity and is installed in the stator support, magnets are fixed on the inner wall of the motor shell, and the motor shell covers the stator core;
the end cap includes: the heat dissipation device comprises a central plate, an edge plate and a plurality of heat dissipation blades fixedly connected with the central plate and the edge plate, wherein the heat dissipation blades are obliquely arranged relative to the plane of the central plate.
Further, the stator assembly further includes: the control panel, the control panel fixed mounting be in on the stator support, electric wire winding fixed mounting be in on the stator core, the control panel with the winding electricity is connected, and external circuit passes through the control panel is to the winding power supply.
Furthermore, a positioning groove is formed in the stator support, a positioning protrusion is arranged on the inner wall of the stator core, and the positioning protrusion is inserted into the positioning groove to enable the stator core and the stator support to be fixed relatively.
Furthermore, bearing cavities are formed in two sides of the shaft cavity, bearings are installed in the bearing cavities, and the rotor shaft is installed in the stator support through the bearings.
Furthermore, one end of the rotor shaft is provided with a clamping groove and a clamping spring installed on the clamping groove, and the clamping spring abuts against the bearing to enable the rotor shaft to be fixedly installed in the stator support.
Furthermore, one end of the rotor shaft is provided with a shaft rib, and the rotor shaft is fixed on the central plate through the shaft rib.
Further, the edge plate of the end cap is provided with a plurality of tooth grooves, and the magnet is inserted into the tooth grooves and fixed to the end cap.
Furthermore, a fixing protrusion is arranged on the inner wall of the motor shell, a fixing groove is formed in the outer wall of the end cover, and the fixing protrusion is inserted into the fixing groove, so that the end cover is fixed on the motor shell.
Furthermore, the one side of magnetite is the curved surface, the curved surface side of magnetite pastes to lean on to be fixed on motor housing's inner wall.
The utility model has the beneficial effects that:
the end cover is a part of the rotor assembly, when the motor works, the end cover rotates, the obliquely arranged radiating blades accelerate the flow of air and accelerate the air to enter or flow out of the interior of the motor shell, and a gap between the stator support and the motor shell is an air inlet/outlet port.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a perspective view of a stator frame according to the present invention;
FIG. 3 is a top view of the stator core of the present invention;
FIG. 4 is an exploded view of the rotor assembly of the present invention;
FIG. 5 is a schematic perspective view of the end cap of the present invention;
FIG. 6 is a schematic cross-sectional view of the present invention;
FIG. 7 is a top view of the present invention;
fig. 8 is a partially enlarged view of a portion a in fig. 6.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the present invention discloses an external rotor dc brushless motor convenient for heat dissipation, including: a stator assembly 1 and a rotor assembly 2.
Referring to fig. 1 to 3, the stator assembly 1 includes: a stator support 11 and a stator core 12 mounted on the stator support 11. The stator support 11 is used for fixing the motor to the outside, a plurality of positioning teeth are arranged on the stator core 12, and the electric wire is wound on the positioning teeth to form a winding.
Referring to fig. 4 and 5, the rotor assembly 2 includes: the motor comprises a rotor shaft 21 arranged on the stator support 11, an end cover 22 fixed at one end of the rotor shaft 21 and a motor shell 23 fixed on the end cover 22.
Referring to fig. 4 to 6, the installation relationship between the stator assembly 1 and the rotor assembly 2 is as follows: a shaft cavity 111 is arranged in the middle of the stator support 11, the rotor shaft 21 penetrates through the shaft cavity 111 and is installed in the stator support 11, a magnet 231 is fixed on the inner wall of the motor shell 23, and the motor shell 23 covers the stator core 12. Alternating current is introduced into the stator core 12 to generate magnetic poles which change regularly, and the magnet 231 moves under the action of force of the coil to drive the rotor assembly 2 to rotate.
Referring to fig. 5, the end cap 22 includes: a central plate 221, an edge plate 222, and a plurality of heat dissipating fins 223 fixedly connecting the central plate 221 and the edge plate 222, wherein the heat dissipating fins 223 are disposed obliquely with respect to the plane of the central plate 221.
The end cover 22 is a part of the rotor assembly 2, when the motor works, the end cover 22 rotates, the inclined radiating blades 223 accelerate the flow of air and accelerate the air to enter or flow out of the motor shell 23, and a gap between the stator bracket 11 and the motor shell 23 is an air inlet/outlet port.
Referring to fig. 2, 3 and 6, the stator assembly 1 of the present invention is specifically installed in the following manner:
the stator assembly 1 further includes: and the control panel 13, the control panel 13 is fixedly installed on the stator bracket 11, the electric wire is wound and fixedly installed on the stator core 12, the control panel 13 is electrically connected with the winding, and the external circuit supplies power to the winding through the control panel 13.
In this embodiment, the control board 13 controls the current flowing into the winding to control the power of the motor and open/close the motor. The function of the control board 13 can be realized by those skilled in the art through the prior art, and the control principle of the control board 13 is not specifically explained in the present invention.
The stator bracket 11 is provided with a positioning groove 112, the inner wall of the stator core 12 is provided with a positioning protrusion 121, and the positioning protrusion 121 is inserted into the positioning groove to fix the stator core 12 and the stator bracket 11 relatively.
The windings on the stator core 12 are easy to rotate relative to the stator bracket 11 by the reaction force of the magnets 231, and the positioning grooves 112 and the positioning protrusions 121 are installed in an inserting manner, so that not only are installation sites provided for the stator core 12, but also the stator core 12 is fixed, the problem that the stator core 12 rotates relative to the stator bracket 11 is avoided, and the stable operation of the motor is ensured.
In other practical embodiments of the present invention, the positioning groove 112 may also be provided on the stator core 12, and the positioning protrusion 121 is provided on the stator frame 11.
Two sides of the shaft cavity 111 are provided with bearing cavities 113, bearings are installed in the bearing cavities 113, and the rotor shaft 21 is installed in the stator support 11 through the bearings. The bearing cavity 113 prevents the bearing from protruding out of the stator support 11, so that the bearing can be stably fixed, and the bearing abrasion is reduced.
Referring to fig. 6 and 7, one end of the rotor shaft 21 is provided with a locking groove 211 and a snap spring 24 installed on the locking groove 211, and the snap spring 24 abuts against a bearing to fixedly install the rotor shaft 21 in the stator bracket 11.
Referring to fig. 4, a shaft rib 212 is disposed at one end of the rotor shaft 21, the rotor shaft 21 is fixed to the central plate 221 through the shaft rib 212, and the shaft rib 212 increases the width of the tail end of the rotor shaft 21, so that the rotor shaft 21 is interference-mounted on the central plate 221, and the holding force between the end cover 22 and the rotor shaft 21 is increased.
Referring to fig. 4 and 5, the edge plate 222 of the end cap 22 is provided with a plurality of slots 224, and the magnet 231 is inserted into the slots 224 and fixed with respect to the end cap 22. The tooth grooves 224 reinforce the holding force between the magnets 231 and the motor housing 23 and the end cover 22, and the tooth grooves 224 provide positioning for the magnets 231, so that an operator can know the mounting position of the magnets 231 in the rotor assembly 2.
Referring to fig. 8, a fixing protrusion 231 is disposed on an inner wall of the motor housing 23, a fixing groove 225 is disposed on an outer wall of the end cover 22, and the fixing protrusion 231 is inserted into the fixing groove 225, so that the end cover 22 is fixed on the motor housing 23.
Referring to fig. 4, one surface of the magnet 231 is a curved surface, and the curved surface side of the magnet 231 is attached and fixed to the inner wall of the motor housing 23. The curved surface is attached to increase the attaching area of the magnet 231 and the motor housing 23, and increase the stability of the magnet 231 and the motor housing 23.
In an embodiment of the present invention, other glue hiding sites may be disposed on the inner wall of the motor housing 23 for adhering and fixing the magnet 231 and the motor housing 23.
It is to be understood that the utility model is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the utility model as defined by the appended claims.
Claims (9)
1. The utility model provides an external rotor direct current brushless motor convenient to heat dissipation which characterized in that includes: a stator assembly and a rotor assembly, the stator assembly comprising: a stator bracket and a stator core mounted on the stator bracket; the rotor assembly includes: the motor comprises a rotor shaft arranged on the stator support, an end cover fixed at one end of the rotor shaft and a motor shell fixed on the end cover;
a shaft cavity is formed in the middle of the stator support, the rotor shaft penetrates through the shaft cavity and is installed in the stator support, magnets are fixed on the inner wall of the motor shell, and the motor shell covers the stator core;
the end cap includes: the heat dissipation device comprises a central plate, an edge plate and a plurality of heat dissipation blades fixedly connected with the central plate and the edge plate, wherein the heat dissipation blades are obliquely arranged relative to the plane of the central plate.
2. The external rotor dc brushless motor for facilitating heat dissipation of claim 1, wherein the stator assembly further comprises: the control panel, the control panel fixed mounting be in on the stator support, electric wire winding fixed mounting be in on the stator core, the control panel is connected with the winding electricity, and external circuit passes through the control panel is to the winding power supply.
3. The external rotor brushless dc motor convenient for heat dissipation of claim 1, wherein the stator frame has a positioning groove, the inner wall of the stator core has a positioning protrusion, and the positioning protrusion is inserted into the positioning groove to fix the stator core and the stator frame relatively.
4. The external rotor brushless dc motor facilitating heat dissipation of claim 1, wherein bearing cavities are disposed at both sides of the shaft cavity, bearings are installed in the bearing cavities, and the rotor shaft is installed in the stator bracket through the bearings.
5. The external rotor brushless dc motor convenient for heat dissipation of claim 4, wherein one end of the rotor shaft is provided with a locking groove and a clamp spring mounted on the locking groove, and the clamp spring abuts against a bearing to fixedly mount the rotor shaft in the stator bracket.
6. The external rotor brushless dc motor facilitating heat dissipation of claim 1, wherein an end of the rotor shaft is provided with a shaft rib, and the rotor shaft is fixed to the central plate through the shaft rib.
7. The external rotor brushless dc motor facilitating heat dissipation according to claim 1, wherein a plurality of tooth grooves are provided on the edge plate of the end cap, and the magnet is inserted into the tooth grooves and fixed to the end cap.
8. The external rotor dc brushless motor convenient for heat dissipation of claim 1, wherein a fixing protrusion is disposed on an inner wall of the motor housing, and a fixing groove is disposed on an outer wall of the end cap, and the fixing protrusion is inserted into the fixing groove, so that the end cap is fixed on the motor housing.
9. The external rotor brushless dc motor of claim 1, wherein one surface of the magnet is a curved surface, and the curved surface of the magnet is attached to the inner wall of the motor housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398812.4U CN216699696U (en) | 2021-09-30 | 2021-09-30 | External rotor direct current brushless motor convenient to heat dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398812.4U CN216699696U (en) | 2021-09-30 | 2021-09-30 | External rotor direct current brushless motor convenient to heat dissipation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216699696U true CN216699696U (en) | 2022-06-07 |
Family
ID=81829891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122398812.4U Expired - Fee Related CN216699696U (en) | 2021-09-30 | 2021-09-30 | External rotor direct current brushless motor convenient to heat dissipation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216699696U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115833479A (en) * | 2022-11-16 | 2023-03-21 | 南昌三瑞智能科技有限公司 | Brushless motor heat abstractor brushless motor |
-
2021
- 2021-09-30 CN CN202122398812.4U patent/CN216699696U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115833479A (en) * | 2022-11-16 | 2023-03-21 | 南昌三瑞智能科技有限公司 | Brushless motor heat abstractor brushless motor |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220607 |
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| CF01 | Termination of patent right due to non-payment of annual fee |