CN201656642U - Brushless outer rotor motor - Google Patents
Brushless outer rotor motor Download PDFInfo
- Publication number
- CN201656642U CN201656642U CN2010201340313U CN201020134031U CN201656642U CN 201656642 U CN201656642 U CN 201656642U CN 2010201340313 U CN2010201340313 U CN 2010201340313U CN 201020134031 U CN201020134031 U CN 201020134031U CN 201656642 U CN201656642 U CN 201656642U
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- Prior art keywords
- motor
- rotor
- stator
- motor shaft
- end cap
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- Expired - Fee Related
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- Motor Or Generator Cooling System (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A brushless outer rotor motor comprises a rotor, a stator, a motor shaft and a motor seat. The rotor is sleeved onto the stator; the axial end of the rotor and the axial end of the stator are installed on the motor seat; an end cover is arranged at the other axial end of the rotor; the motor shaft sequentially penetrates through the motor seat, the stator and the end cover; a plurality of blade-shaped radiation holes formed by means of hollowing out are arranged on the end cover; and a spiral propeller impeller is arranged at the tail end of the motor shaft penetrating through the end cover. Radiation holes on an existing motor are modified into a blade-shaped radiation structure in the rotor, and the radiation structure increases radiation area, and increases radiation speed. Simultaneously, the propeller impeller is arranged at the tail end of the motor shaft, and an active radiation fan passage is formed at the radiation hole of the motor through rotation of the impeller to lead inner and outer air flowing spaces to be larger in running process of the motor, to lead heat exchanging efficiency to be higher, to ensure steady and smooth running of the motor, and to prolong service life of inner components.
Description
Technical field
The utility model relates to a kind of motor, more particularly, relates to a kind of brushless external rotor motor with good heat radiating structure.
Background technology
The motor that is used for model plane, toy and household appliances at present mostly is common brushless external rotor motor, this brushless external rotor motor generally carries out passive heat radiation by louvre, because the area of dissipation of this louvre is limited, can not in time calorie spread be gone out, easily cause in the running motor internal magnet owing to the heat accumulation temperature rise is demagnetized, thereby cause electric efficiency to descend.
Patent Office of the People's Republic of China's patent documentation discloses " Heat-dissipating impeller of motor ", integrated axle sleeve is provided, no chassis shape baffle liner is connected by one group of blade integral, described one group of blade is that the center becomes radial radiation shape structure with the axle sleeve, is cut apart by blade between circle and the axle sleeve in the baffle liner to constitute pod apertures.The heat-dissipating impeller of this motor utilizes pod apertures and increases blade area and reaches thus increasing heat radiation effect, but the blade construction complexity, processing difficulties, cost height.
Similarly, " the motor radiating structure " that another patent documentation of Patent Office of the People's Republic of China discloses, be by impeller being set on the motor shaft and blade being set on rotor, simplified the structure of forward and backward end cap simultaneously, radiating effect is better, but this radiator structure that is used for motor generally is suitable for powerful motor, for the low-power machine that is used on household electrical appliances, the toy, then has certain limitation.
The utility model content
Technical problem to be solved in the utility model be to provide a kind of simple in structure, have a good heat radiating design of mini brushless external rotor motor.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of brushless external rotor motor is provided, comprise rotor, stator, motor shaft and motor seat, described rotor is sheathed on the described stator, described rotor and stator shaft orientation one end are installed on the described motor seat, the axial other end of described rotor is provided with an end cap, described motor shaft wears described motor seat, stator and end cap successively, described end cap is provided with the louvre of the fan blade shape of some hollow outs formation, and the motor shaft end that passes in described end cap is provided with a propeller impeller.
Further, described louvre with described motor shaft be the center radially.
Particularly, described propeller impeller is a shaft flow blade wheel.
Particularly, described propeller impeller is a quaterfoil formula structure.
Further, described propeller impeller is installed on described motor shaft end by a pedestal.
Further, described pedestal comprises that one is provided with externally threaded connecting pin, in the end one-body molded of the described connecting pin wind-guiding baffle plate vertical with described connecting pin, described wind-guiding its centre is provided with can hold the centre bore that described motor shaft penetrates, be provided with installing hole around described centre bore, described end cap is provided with the connecting hole corresponding with described installing hole.
Further, also be provided with packing ring between described propeller impeller and the described wind-guiding baffle plate.
The louvre that the utility model will have now on the motor is improved to the louvre structure that is the fan blade shape, this radiator structure has increased area of dissipation, improved radiating rate, simultaneously be provided with a propeller impeller in the motor shaft end, the louvre place that rotates on motor by impeller forms an active heat removal air channel, makes that motor inside and outside air flow spaces in running is bigger, and heat exchanger effectiveness is higher, guarantee the operation of motor stabilizing smoothness, prolonged the useful life of inner each assembly.
Description of drawings
Fig. 1 is the installation cutaway view of the utility model one preferred embodiment;
Fig. 2 is the front view of end cap in the present embodiment;
Fig. 3 is the right view of Fig. 2;
Fig. 4 is an A-A cutaway view among Fig. 2.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Please refer to Fig. 1, Fig. 2, be a preferred embodiment of the present utility model, described brushless external rotor motor, comprise rotor 1, stator 2, motor shaft 3 and motor seat 4, described rotor 1 is sheathed on the described stator 2, described rotor 1 and stator 2 axial ends are installed on the described motor seat 4, the axial other end of described rotor 1 is provided with an end cap 5, described motor shaft 3 wears described motor seat 4, stator 2 and end cap 5 successively, described end cap 5 is provided with the louvre 51 of the fan blade shape of some hollow outs formation, and motor shaft 3 ends that pass in described end cap 5 are provided with a propeller impeller 6.
The louvre that the utility model will have now on the motor is improved to louvre 51 structures that are the fan blade shape, this radiator structure has increased area of dissipation, improved radiating rate, simultaneously be provided with a propeller impeller 6 in motor shaft 3 ends, the louvre that rotates on motor 51 places by propeller impeller 6 form an active heat removal air channel, make that motor inside and outside air flow spaces in running is bigger, heat exchanger effectiveness is higher, guarantee the operation of motor stabilizing smoothness, prolonged the useful life of inner each assembly.
Below each part of present embodiment is further described in detail.
With reference to Fig. 2 to Fig. 4, the fan blade shape louvre 51 that hollow out forms on the described end cap 5 with described motor shaft 3 be the center radially.The less louvre that has on the end cap of louvre 51 than motor in the prior art of this fan blade shape, area of dissipation is bigger, and louvre 51 with motor shaft 3 be the center radially, when having increased motor shaft 3 rotations, the air-out effect of motor internal, louvre hollow out with the fan blade shape forms simultaneously, has alleviated the weight of end cap 5, has also saved material.
In the present embodiment, the propeller impeller 6 of being located at motor shaft 3 ends is a shaft flow blade wheel.Employing shaft flow blade wheel when motor shaft 3 rotates, can suck the cold airflow that is axially produced by propeller impeller 6 better in the motor, make the thermal current in cold airflow and the motor carry out heat exchange, thereby reach the purpose of quick heat radiating.In the present embodiment, described propeller impeller 6 can certainly adopt three leaf structures or other multiple-blade structure for for quaterfoil formula structure.
Further, with reference to Fig. 1, in the present embodiment, described propeller impeller 6 is installed on the end of described motor shaft 3 by a pedestal 7.Described pedestal 7 is one to be provided with the connecting pin 71 of external screw thread 711, in the vertical wind-guiding baffle plate 72 of the end one-body molded of described connecting pin 71 and described connecting pin 71, the center of described wind-guiding baffle plate 72 is provided with and can holds the centre bore 721 that described motor shaft 3 penetrates, and is provided with installing hole 722 around described centre bore 721.Described end cap 5 is provided with the connecting hole 52 corresponding with described installing hole 722.Described propeller impeller 6 is fixed on the described connecting pin 71 by the nut 8 that is combined on the external screw thread 711.Described wind-guiding baffle plate 72 is combined on installing hole 722 and connecting hole 52 by correspondence screw 9 is fixedlyed connected with described end cap 5, is arranged in the centre bore 721 in described motor shaft 3 correspondences simultaneously.In the present embodiment, with the structure that is designed on the pedestal 7 with wind-guiding baffle plate 72,, reduced resistance through propeller impeller air-flow by wind-guiding baffle plate 72 is set, the cold wind stream that makes propeller impeller 6 produce when rotating is faster with the thermal current rate of heat exchange of motor internal, better effects if.In the present embodiment, more fastening in order to make installation, also be provided with packing ring 10 between described propeller impeller 6 and the described wind-guiding baffle plate 72.
Please referring again to Fig. 1, the brushless external rotor motor that present embodiment provides, rotor 1 is a permanent magnet, stator 2 is a winding coil, rotor 1 closely is sheathed on the stator 2, stator 2 is fixed on the motor seat 4, when connecting corresponding direct current, rotor 1 and motor shaft 3 run-in synchronisms, in motor operation course, the propeller impeller 6 of being located at motor shaft 3 ends rotates the cold airflow that produces synchronously and carries out heat exchange by hot-air in the lobate louvre 51 of end cap 5 windwards and the motor, this active heat removal and the design that increases louvre make that the heat in the motor can in time distribute, and avoid permanent magnet because of overheated problem of demagnetizing, improve the operating efficiency of motor, also prolonged useful life simultaneously.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1. brushless external rotor motor, comprise rotor, stator, motor shaft and motor seat, described rotor is sheathed on the described stator, described rotor and stator shaft orientation one end are installed on the described motor seat, the axial other end of described rotor is provided with an end cap, described motor shaft wears described motor seat, stator and end cap successively, it is characterized in that: described end cap is provided with the louvre of the fan blade shape of some hollow outs formation, and the motor shaft end that passes in described end cap is provided with a propeller impeller.
2. a kind of brushless external rotor motor as claimed in claim 1 is characterized in that: described louvre with described motor shaft be the center radially.
3. a kind of brushless external rotor motor as claimed in claim 1 or 2 is characterized in that: described propeller impeller is a shaft flow blade wheel.
4. a kind of brushless external rotor motor as claimed in claim 3 is characterized in that: described propeller impeller is a quaterfoil formula structure.
5. as claim 1 or 4 described a kind of brushless external rotor motors, it is characterized in that: described propeller impeller is installed on described motor shaft end by a pedestal.
6. a kind of brushless external rotor motor as claimed in claim 5, it is characterized in that: described pedestal is one to be provided with externally threaded connecting pin, in the end one-body molded of the described connecting pin wind-guiding baffle plate vertical with described connecting pin, described wind-guiding its centre is provided with can hold the centre bore that described motor shaft penetrates, be provided with installing hole around described centre bore, described end cap is provided with the connecting hole corresponding with described installing hole.
7. a kind of brushless external rotor motor as claimed in claim 6 is characterized in that: also be provided with packing ring between described propeller impeller and the described wind-guiding baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201340313U CN201656642U (en) | 2010-03-16 | 2010-03-16 | Brushless outer rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201340313U CN201656642U (en) | 2010-03-16 | 2010-03-16 | Brushless outer rotor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201656642U true CN201656642U (en) | 2010-11-24 |
Family
ID=43121876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201340313U Expired - Fee Related CN201656642U (en) | 2010-03-16 | 2010-03-16 | Brushless outer rotor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201656642U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201719A (en) * | 2010-12-22 | 2011-09-28 | 胡景威 | Production method of outer rotor type brushless DC (direct current) motor for model airplane |
| CN109217563A (en) * | 2017-07-05 | 2019-01-15 | 王颖熙 | A kind of efficient pectinid cool electric machine and its application method |
-
2010
- 2010-03-16 CN CN2010201340313U patent/CN201656642U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201719A (en) * | 2010-12-22 | 2011-09-28 | 胡景威 | Production method of outer rotor type brushless DC (direct current) motor for model airplane |
| CN102201719B (en) * | 2010-12-22 | 2016-06-01 | 胡景威 | The production method of brshless DC motor is turned outside a kind of model plane |
| CN109217563A (en) * | 2017-07-05 | 2019-01-15 | 王颖熙 | A kind of efficient pectinid cool electric machine and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20120316 |