CN204013075U - Direct current permanent magnetic brushless motor - Google Patents
Direct current permanent magnetic brushless motor Download PDFInfo
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- CN204013075U CN204013075U CN201420338183.3U CN201420338183U CN204013075U CN 204013075 U CN204013075 U CN 204013075U CN 201420338183 U CN201420338183 U CN 201420338183U CN 204013075 U CN204013075 U CN 204013075U
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- bearing pedestal
- motor
- direct current
- bearing
- motor housing
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Abstract
The utility model provides a kind of direct current permanent magnetic brushless motor, the permanent magnet as rotor (6) comprise, bearing pedestal (1), pcb board (2), the core assembly (3) as stator, motor output shaft (4), motor housing (5) being fixedly connected with motor housing; Within described core assembly (3) is fixedly connected with described bearing pedestal and is positioned at motor housing; Described pcb board (2) is with some through holes and be sheathed on the extending column (9) of bearing pedestal; Described motor output shaft (4) is fixedly connected with described motor housing and is connected with first, second bearing (10,11) being installed on bearing pedestal (1); Described motor housing assembly bottom is one-body molded fan (8), in the time that described fan (8) direction of rotation is contrary, the interior air flow direction of shell (5) is contrary, on described bearing pedestal (1), is also provided with multiple ventilation holes (13).The utility model is simple in structure, and radiating effect is better.
Description
Technical field
The utility model relates to a kind of direct current permanent magnetic brushless motor, particularly relates to a kind of radiator structure of direct current permanent magnetic brushless motor.
Background technology
Motor radiating mode mainly contains self cool, certainly fans cold type, forces cold type etc. at present.Adopt of large-size machine forced cold type mode more, and its medium is generally oil, water, and radiating efficiency is higher, but system complex.Low-power machine adopts mostly from fan cold type, comprises axial flow spiral fan and the large class of centrifugal fan two.Wherein brushless electric machine because of simple in structure, volume is little, efficiency is high and without the impact of brush motor commutator electric spark, adopting self cool aspect heat radiation more.But when demand power is higher, in the more severe situation of operating mode, the electric current of brushless electric machine is larger, and the whirlpool of iron core is damaged and also increased, thereby iron core is also higher with coiling temperature rise, and the radiating effect of self cool cannot meet the required working temperature of motor.Chinese patent CN200947571Y has disclosed the operation principle of existing direct current permanent magnetic brushless motor, when common this type of machine operation, the coil of winding on its stator can produce a large amount of heats, general this kind of motor do not have special heat abstractor, or thermal component need to be additionally set, make structure relatively loaded down with trivial details, cost is higher.And the sealing of the upper and lower surface of this motor housing, it carries out ventilation and heat by several ventilation holes being set in the upper and lower surface of motor housing.But ventilation hole flow is less, and air-flow is not easy to enter in electric machine casing, and radiating effect is undesirable.In addition, in the time that needs motor output rotates and reverse, ventilation hole is difficult to form forward, reverse air flow direction.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of direct current permanent magnetic brushless motor, and its shell carries radiator fan.Use this radiating mode to save independent radiating vane part, both saved space, removed less the noise that causes because of Assembly of the parts precision, can obtain again good radiating effect.
Technical problem to be solved in the utility model is achieved through the following technical solutions.
A kind of direct current permanent magnetic brushless motor, comprise bearing pedestal, pcb board, core assembly, motor output shaft, motor housing and the permanent magnet as rotor as stator, described bearing pedestal is fixedly connected with described core assembly, described motor output shaft is fixedly connected with motor housing, described motor housing bottom is also one-body molded a fan, and described fan is synchronizeed and rotated with motor housing.
The upper and lower surface of described motor housing is all set to open surface, and described fan adopts aerofoil fan, and when fan direction of rotation is contrary, the air flow direction in motor housing is contrary.
Further, described permanent magnet is fixedly connected with motor housing, and permanent magnet ring is around the outside of described core assembly, between described permanent magnet and described core assembly, is provided with gap.
Or described permanent magnet is fixedly connected with motor output shaft, and permanent magnet is arranged on the inner side of described core assembly.
Described bearing pedestal extends a hollow extending column towards the one side of fan, and described pcb board and core assembly are set in and on this extending column, form and being fixedly connected with of bearing pedestal, and described pcb board is between core assembly and bearing pedestal, and described pcb board is with some through holes.
In the middle of described bearing pedestal and the extending column of bearing pedestal, indent forms bearing chamber, accommodating first, second bearing in bearing chamber, and first, second bearing outer ring is connected with bearing pedestal, and first, second bearing inner race is connected with motor output shaft.
Described bearing pedestal is provided with multiple ventilation holes.
Preferably, described ventilation hole is 6, and even angle distributes.
In order further to strengthen heat radiation, the one side that deviates from fan on described bearing pedestal is provided with multiple fin.
In order to reduce leakage field, between described motor housing and permanent magnet, be provided with gear magnet ring.
The beneficial effects of the utility model are, adopt shell to carry radiator fan, save independent radiating vane part, have both saved space, have removed less the noise that causes because of Assembly of the parts precision, can obtain again good radiating effect, and simple in structure, radiating effect is better.In addition, motor housing upper and lower surface is open to be arranged, and the air flow rate of the motor internal that makes to flow through is large, further improves radiating effect; And easily form forward, direction air-flow in electric machine casing, be beneficial to motor forward, reversion heat radiation.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the utility model direct current permanent magnetic brushless motor;
Fig. 2 is the side schematic view of direct current permanent magnetic brushless motor shown in Fig. 1;
Fig. 3 is the generalized section of direct current permanent magnet motor shown in Fig. 1;
Fig. 4 is the explosive view of direct current permanent magnetic brushless motor shown in Fig. 1;
Fig. 5 is the vertical view of direct current permanent magnetic brushless motor shown in Fig. 1;
Fig. 6 is the schematic perspective view of the bearing pedestal of direct current permanent magnetic brushless motor shown in Fig. 1.
Embodiment
Fig. 1, Fig. 2 are the overall schematic of the utility model direct current permanent magnetic brushless motor, Fig. 3, Fig. 4 are its side schematic view and generalized section, as shown in Figure 3, Figure 4, the utility model direct current permanent magnetic brushless motor mainly comprises bearing pedestal 1, PCB (printed substrate) plate 2, core assembly 3 as stator, motor output shaft 4, motor housing 5 and as permanent magnet 6 of rotor etc.Core assembly 3 as stator is fixedly connected on bearing pedestal 1.Permanent magnet 6 as rotor is fixedly connected on motor housing 5, and is looped around described core assembly outside, between described permanent magnet 6 and described core assembly 3, is provided with gap.Motor housing 5 is fixedly connected with motor output shaft 4, motor output shaft 4 is fixed on bearing pedestal 1 by first, second bearing again, motor housing 5 can rotate around bearing pedestal 1 by motor output shaft 4, and then the permanent magnet 6 being fixedly connected with motor housing 5 can rotate around the core assembly 3 being fixedly connected with bearing pedestal 1.
Motor housing 5 is cylindric, and its upper and lower surface is all set to open surface, and in the present embodiment, motor housing 5 does not have upper shell, and lower house is by replacing with the motor housing 5 integrated aerofoil fans in bottom, and this fan is synchronizeed rotation with motor housing 5.Bearing pedestal 1 one side indent forms bearing chamber, another side extends a hollow cylindrical extending column 9, core assembly 3 has the centre bore mating with extending column 9, is located on this extending column 9 and is formed and being fixedly connected with of bearing pedestal 1, and be installed in motor housing 5 by this borehole jack.Also be set in the pcb board 2 of some through hole (not shown)s on the extending column 9 of this bearing pedestal, between core assembly 3 and bearing pedestal 1, simultaneously also between motor housing 5 and bearing pedestal 1.Core assembly 3 is provided with groove, is arranged with coil (not shown) in described groove, and described coil connects described pcb board 2.As shown in Figure 6, in the middle of bearing pedestal 1, indent forms a bearing chamber, and the hollow space of the extending column 9 of this bearing chamber and bearing pedestal 1 forms shoulder hole.Accommodating clutch shaft bearing 10 in this bearing chamber, clutch shaft bearing 10 outer rings are connected with bearing pedestal 1, and clutch shaft bearing 10 inner rings are connected with motor output shaft 4.Extending column 9 forms a bearing chamber away from the same indent in one end of bearing pedestal 1, and for the second bearing is installed, this bearing chamber hollow space same and bearing pedestal extending column 9 forms shoulder hole.The second bearing 11 outer rings are connected with bearing pedestal 1, and the second bearing 11 inner rings are connected with motor output shaft 4.Motor output shaft 4 is fixedly connected with by modes such as key are connected with motor housing 5 bottoms through clutch shaft bearing 10, the extending column 9 of hollow, the second bearing 11, makes motor housing 5 and the permanent magnet 6 that is fixedly connected with it can rotate with the core assembly 3 that first, second bearing 10,11 is fixedly connected with around bearing pedestal 1 and with it by motor output shaft.In the present embodiment, also offer draw-in groove on motor output shaft 4, be embedded with jump ring 12 in draw-in groove, jump ring 12 offsets with clutch shaft bearing inner ring, thereby while preventing motor output shaft 4 high speed rotating, axial displacement occurs.
In the present embodiment, bearing pedestal 1 is die casting aluminium bearing pedestal, because core assembly 3 is fixedly connected with bearing pedestal 1, core assembly 3 damages because of whirlpool the heat producing and contacts through the cylindrical surface of the centre bore of core assembly and the extending column of bearing pedestal 9 with the heat of coiled wire-wound coil internal resistance generation, and heat conducts to bearing pedestal.Again because the bottom of motor housing is provided with fan 8 one-body moldedly, in the time that motor housing 5 turns round, the axial flow wind that fan 8 produces will be through iron core winding (as shown in Figure 2 and Figure 3), again by the pcb board 2 with some through holes, heat is taken away from the gap between pcb board 2 and bearing pedestal 1 the most at last, thereby obtains good radiating effect.Along with the difference that turns to of motor, fan 8 has two direction of rotation, and when fan direction of rotation is contrary, the air flow direction in electric machine casing is contrary.In the present embodiment, in the time that the side from bearing pedestal sees that toward a side of fan motor steering is counterclockwise CCW, radiation air is to upwards, and in the time that motor steering is clockwise CW, radiation air is to being downward.Due to all open settings of upper and lower surface of electric machine casing, no matter fan clockwise or rotate counterclockwise, air-flow all very easily enters from lower surface and flows out (or enter from upper surface and flow out from lower surface) from electric machine casing upper surface, and gas flow is larger, radiating effect highly significant.In order to coordinate ventilation, as shown in Figure 5 and Figure 6, multiple ventilation holes 13 can be set on bearing pedestal, in the present embodiment, these ventilation holes 13 1 have 6, and even angle distributes, and wherein three ventilation holes are on the less circumference of same diameter, other three on the larger circumference of same diameter, they mutually stagger and are beneficial to even ventilation and heat.
Further, multiple fin 14 also can be set on bearing pedestal 1, described fin is arranged on the one side that deviates from fan on bearing pedestal, to help further heat radiation.
It should be noted that, gear magnet ring 7 also can be set between motor housing 5 and permanent magnet 6, and its effect is to prevent leakage field and affect magnetic field.Permanent magnet 6 also can be fixed on motor output shaft 4, and is positioned at core assembly inner side, and the conventional means that its implementation is this area, does not repeat them here.
Claims (10)
1. a direct current permanent magnetic brushless motor, comprise bearing pedestal (1), pcb board (2), core assembly (3), motor output shaft (4), motor housing (5) and the permanent magnet (6) as rotor as stator, it is characterized in that, described bearing pedestal (1) is fixedly connected with described core assembly (3), described motor output shaft (4) is fixedly connected with motor housing (5), described motor housing bottom is also one-body molded a fan (8), and described fan (8) is synchronizeed rotation with motor housing (5).
2. direct current permanent magnetic brushless motor as claimed in claim 1, it is characterized in that, the upper and lower surface of described motor housing (5) is all set to open surface, described fan (8) adopts aerofoil fan, when fan (8) direction of rotation is contrary, the air flow direction in motor housing (5) is contrary.
3. direct current permanent magnetic brushless motor as claimed in claim 2, it is characterized in that, described permanent magnet (6) is fixedly connected with motor housing (5), and permanent magnet (6) is looped around the outside of described core assembly (3), between described permanent magnet (6) and described core assembly (3), be provided with gap.
4. direct current permanent magnetic brushless motor as claimed in claim 2, it is characterized in that, described permanent magnet (6) is fixedly connected with motor output shaft (4), and permanent magnet (6) is arranged on the inner side of described core assembly (3).
5. direct current permanent magnetic brushless motor as claimed in claim 1, it is characterized in that, described bearing pedestal (1) extends a hollow extending column (9) towards the one side of fan (8), described pcb board (2) and core assembly (3) are set in that this extending column (9) is upper to be formed and being fixedly connected with of bearing pedestal (1), described pcb board (2) is positioned between core assembly (3) and bearing pedestal (1), and described pcb board (2) is with some through holes.
6. direct current permanent magnetic brushless motor as claimed in claim 1, it is characterized in that, in the middle of described bearing pedestal (1) and the extending column (9) of bearing pedestal (1), indent forms bearing chamber, accommodating first, second bearing (10,11) in bearing chamber, first, second bearing (10,11) outer ring is connected with bearing pedestal (1), and first, second bearing (10,11) inner ring is connected with motor output shaft (4).
7. the direct current permanent magnetic brushless motor as described in claim 5 or 6, is characterized in that, described bearing pedestal (1) is provided with multiple ventilation holes (13).
8. direct current permanent magnetic brushless motor as claimed in claim 7, is characterized in that, described ventilation hole (13) is 6, and even angle distributes.
9. direct current permanent magnetic brushless motor as claimed in claim 7, is characterized in that, the one side that deviates from fan (8) on described bearing pedestal (1) is provided with multiple fin (14).
10. direct current permanent magnetic brushless motor as claimed in claim 1, is characterized in that, is provided with gear magnet ring (7) between described motor housing (5) and permanent magnet (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420338183.3U CN204013075U (en) | 2014-06-23 | 2014-06-23 | Direct current permanent magnetic brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420338183.3U CN204013075U (en) | 2014-06-23 | 2014-06-23 | Direct current permanent magnetic brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204013075U true CN204013075U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420338183.3U Active CN204013075U (en) | 2014-06-23 | 2014-06-23 | Direct current permanent magnetic brushless motor |
Country Status (1)
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| CN (1) | CN204013075U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882984A (en) * | 2015-06-15 | 2015-09-02 | 支敏之 | Cover with function of active heat dissipation for external rotor motor |
| CN105337449A (en) * | 2014-06-23 | 2016-02-17 | 苏州科沃斯商用机器人有限公司 | Direct-current permanent-magnet brushless motor |
| CN108015858A (en) * | 2017-12-07 | 2018-05-11 | 科尔芯动（北京）科技有限公司 | The lightweight reciprocating saw that a kind of branches of tall trees are cut out |
-
2014
- 2014-06-23 CN CN201420338183.3U patent/CN204013075U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337449A (en) * | 2014-06-23 | 2016-02-17 | 苏州科沃斯商用机器人有限公司 | Direct-current permanent-magnet brushless motor |
| CN104882984A (en) * | 2015-06-15 | 2015-09-02 | 支敏之 | Cover with function of active heat dissipation for external rotor motor |
| CN108015858A (en) * | 2017-12-07 | 2018-05-11 | 科尔芯动（北京）科技有限公司 | The lightweight reciprocating saw that a kind of branches of tall trees are cut out |
| CN108015858B (en) * | 2017-12-07 | 2020-07-10 | 科尔芯动（北京）科技有限公司 | Portable reciprocating saw for pruning high branches |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Wuzhong Economic Development Zone in Suzhou City, Jiangsu Province, the River Street 215104 Youxiang Road No. 18 building 3 Patentee after: Ecovacs commercial robot Co Ltd Address before: Wuzhong District Wuzhong Economic Development Zone Suzhou city Jiangsu province 215104 the River Street Youxiang Road No. 18 building 3 Patentee before: Butterworth business machine people Co., Ltd of Suzhou section |