CN207150294U - Brushless electric machine and unmanned plane - Google Patents
Brushless electric machine and unmanned plane Download PDFInfo
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- CN207150294U CN207150294U CN201721030947.2U CN201721030947U CN207150294U CN 207150294 U CN207150294 U CN 207150294U CN 201721030947 U CN201721030947 U CN 201721030947U CN 207150294 U CN207150294 U CN 207150294U
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- end cap
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Abstract
The utility model belongs to technical field of motors, it is related to a kind of brushless electric machine and unmanned plane, the brushless electric machine includes drive end bearing bracket, casing, rear end cap and output shaft, the drive end bearing bracket and rear end cap are arranged on the both ends of the casing, the output shaft rotation is supported on the drive end bearing bracket, the rear end of the output shaft is fixedly connected with the rear end cap, the front end of the output shaft passes the drive end bearing bracket, the rear end of the casing is fixedly connected with the rear end cap, and the rear end cap includes the centrifugal flabellum structure of rear end cap body and the hollow out being arranged on the rear end cap body.According to the brushless electric machine of the utility model embodiment, the centrifugal flabellum structure of hollow out is provided with rear end cap, so when rear end cap rotates, the centrifugal flabellum structure of hollow out is equivalent to centrifugal fan, radial air flow and circulation air path can be formed during rotation, and then the more heats of brushless electric machine are scattered away by larger air quantity caused by centrifugal flabellum structure, temperature is too high when avoiding the brushless electric machine from working.
Description
Technical field
The utility model belongs to technical field of motors, more particularly to a kind of brushless electric machine and unmanned plane.
Background technology
Existing unmanned plane is mostly brshless DC motor with ventilated machine, and stationary part is mainly by drive end bearing bracket, stator
Iron core and winding composition, rotor portion are mainly made up of permanent magnetic steel, rear end cap, casing and output shaft.
The radiator structure of existing brushless electric machine, the trapezoidal groove being mainly provided with by casing surface and front and rear cover
Heat emission hole is radiated.
But motor operation speed used in unmanned plane is high, power is high and loss is big, is only entered by casing and heat emission hole
Row radiating is easily caused heat dissipation capacity deficiency, thus causes motor temperature too high.
Utility model content
Technical problem to be solved in the utility model is：For existing air-cooled brushless electric machine, only by casing and dissipate
Hot hole carries out radiating and is easily caused heat dissipation capacity deficiency, the problem of thus causing motor temperature too high, there is provided a kind of brushless electric machine and nothing
It is man-machine.
In order to solve the above technical problems, on the one hand, the utility model embodiment provides a kind of brushless electric machine, including front end
Lid, casing, rear end cap and output shaft, the drive end bearing bracket and rear end cap are arranged on the both ends of the casing, the output shaft rotation
It is supported on the drive end bearing bracket, the rear end of the output shaft is fixedly connected with the rear end cap, and the front end of the output shaft passes
The drive end bearing bracket, the rear end of the casing are fixedly connected with the rear end cap, and the rear end cap includes rear end cap body and setting
The centrifugal flabellum structure of hollow out on end cap body in the rear.
Alternatively, the rear end cap body includes ring body and the end plate on rear side of the ring body, the centrifugal flabellum
Structure setting is between the ring body and end plate.
Alternatively, the centrifugal flabellum structure includes center projection and multiple centrifuge blades, and the centrifuge blade is arranged on
The front side of the end plate and radially extending along the center projection, the inner of the centrifuge blade are connected to the middle cardiac prominence
On post, the outer end of the centrifuge blade is connected between the ring body and the end plate, the two neighboring centrifuge blade
Hollow hole is formed between outer end, the hollow hole is between the ring body and the edge of the end plate.
Alternatively, multiple centrifuge blades are arranged at equal intervals in a circumferential direction.
Alternatively, the rear inside of the casing is provided with internal thread, and the forward edge of the ring body is formed with circumference
The multiple threaded blocks being intervally arranged on direction, multiple threaded blocks are threadedly coupled with the rear end of the casing.
Alternatively, the rear end of the output shaft is provided with external screw thread, the inner hollow of the center projection and in being provided with
Screw thread, the rear end of the output shaft are threaded in the center projection.
Alternatively, the outer surface of the casing is provided with helical form radiating groove.
Alternatively, the front end of the output shaft is fixedly connected with a propeller.
Alternatively, the drive end bearing bracket includes integrally formed drive end bearing bracket body and stator inner sleeve.
Alternatively, multiple heat emission holes and multiple extraction string holes, multiple heat emission holes are provided with the drive end bearing bracket body
It is arranged alternately in a circumferential direction with multiple extraction string holes；
Multiple heat emission holes are arranged at equal intervals in a circumferential direction, between multiple extraction string holes wait in a circumferential direction
Every arrangement.
Alternatively, four heat emission holes and four extraction string holes, four heat emission holes are provided with the drive end bearing bracket body
90 degree of arrangements are spaced in a circumferential direction, and four string holes of drawing are in the arrangement of 90 degree of circumferencial direction interval.
Alternatively, it is provided with threaded mounting hole on the drive end bearing bracket body.
According to the brushless electric machine of the utility model embodiment, the centrifugal flabellum structure of hollow out is provided with rear end cap, so
When rear end cap rotates, the centrifugal flabellum structure of hollow out can form radial air flow and circulated air equivalent to centrifugal fan, during rotation
Road, and then the more heats of brushless electric machine are scattered away by larger air quantity caused by centrifugal flabellum structure, avoid brushless electric machine from working
Shi Wendu is too high.
On the other hand, the utility model also provides a kind of unmanned plane, and it includes above-mentioned brushless electric machine.
Brief description of the drawings
Fig. 1 is the stereogram for the brushless electric machine that the embodiment of the utility model one provides；
Fig. 2 is the stereogram of the rear end cap for the brushless electric machine that the embodiment of the utility model one provides；
Fig. 3 is the stereogram of the casing for the brushless electric machine that the embodiment of the utility model one provides；
Fig. 4 is the stereogram of the drive end bearing bracket for the brushless electric machine that the embodiment of the utility model one provides；
Fig. 5 is the top view of the drive end bearing bracket for the brushless electric machine that the embodiment of the utility model one provides；
Fig. 6 is the side view of the drive end bearing bracket for the brushless electric machine that another embodiment of the utility model provides；
Fig. 7 is the sectional view in the A-A directions along Fig. 6；
Fig. 8 is the stereogram for the brushless electric machine that another embodiment of the utility model provides；
Fig. 9 is the sectional view (omission casing) for the brushless electric machine that another embodiment of the utility model provides；
Figure 10 is the enlarged drawing at a in Fig. 9；
Figure 11 is the enlarged drawing at b in Fig. 9；
Figure 12 is the schematic diagram of the output shaft for the brushless electric machine that another embodiment of the utility model provides.
Reference in specification is as follows：
1st, drive end bearing bracket；11st, drive end bearing bracket body；111st, heat emission hole；112nd, string holes is drawn；113rd, threaded mounting hole；12nd, stator
Inner sleeve；121st, fore bearing room；122nd, rear bearing chamber；123rd, middle cavity；124th, foreground terrace；125th, backstage terrace；126th,
One circlip groove；
2nd, casing；21st, internal thread；22nd, helical form radiating groove；
3rd, rear end cap；31st, rear end cap body；311st, ring body；3111st, threaded block；312nd, end plate；32nd, centrifugal flabellum knot
Structure；321st, center projection；322nd, centrifuge blade；323rd, hollow hole；
4th, output shaft；41st, the shaft shoulder；42nd, the second circlip groove；
5th, propeller；
6th, fore bearing；
7th, rear bearing；
8th, circlip for hole；
9th, back-up ring is clamped.
Embodiment
In order that technical problem, technical scheme and beneficial effect that the utility model solves are more clearly understood, below
With reference to drawings and Examples, the utility model is described in further detail.It is it should be appreciated that described herein specific real
Example is applied only to explain the utility model, is not used to limit the utility model.
The upper and lower orientation referred to when unmanned plane is normally positioned over horizontal plane herein.
As shown in Figures 1 to 5, the embodiment of the utility model one provide brushless electric machine, including drive end bearing bracket 1, casing 2, after
End cap 3 and output shaft 4, the drive end bearing bracket 1 and rear end cap 3 are arranged on the both ends of the casing 2, the rotational support of output shaft 4
In on the drive end bearing bracket 1, the rear end of the output shaft 4 is fixedly connected with the rear end cap 3, and the front end of the output shaft 4 passes
The drive end bearing bracket 1, the rear end of the casing 2 are fixedly connected with the rear end cap 3, and the rear end cap 3 includes rear end cap body 31
And it is arranged on the centrifugal flabellum structure 32 of the hollow out on the rear end cap body 31.
In one embodiment, as shown in Fig. 2 the rear end cap body 31 includes ring body 311 and after the ring body 311
The end plate 312 of side, the centrifugal flabellum structure 32 are arranged between the ring body 311 and end plate 312.Preferably, rear end
Plate 312 is integrally formed.
In one embodiment, as shown in Fig. 2 the centrifugal flabellum structure 32 includes center projection 321 and multiple centrifugation leaves
Piece 322, the centrifuge blade 322 are arranged on the front side of the end plate 312 and radially extending along the center projection 321,
The inner of the centrifuge blade 322 is connected on the center projection 321, and the outer end of the centrifuge blade 322 is connected to described
Between ring body 311 and the end plate 312, hollow hole 323, institute are formed between the outer end of the two neighboring centrifuge blade 322
Hollow hole 323 is stated between the ring body 311 and the edge of the end plate 312.The hollow out design of centrifugal flabellum structure 32
The hollow hole 323 is presented as in this embodiment.
Preferably, multiple centrifuge blades 322 are arranged at equal intervals in a circumferential direction.
In one embodiment, as shown in figure 3, the rear inside of the casing 2 is provided with internal thread 21, the ring body 311
Forward edge formed with the multiple threaded blocks 3111 being intervally arranged in a circumferential direction, multiple threaded blocks 3111 with it is described
The rear end threaded connection of casing 2, the rear end of the casing 2 and being fixedly connected for the rear end cap 3 are realized with this.
In one embodiment, as shown in figure 3, the rear end of the output shaft 4 is provided with external screw thread, the center projection 321
Inner hollow and be provided with internal thread, the rear end of the output shaft 4 is threaded in the center projection 321.
As shown in Figures 1 and 3, the outer surface of the casing 2 is provided with helical form radiating groove 22.Helical form radiating groove
22 can increase the area of dissipation (for the casing with smooth outer surface) of casing 2, while with the rotation of rotor portion
Turn to add axial flow, so as to take away more heats.
In addition, as shown in figure 1, the front end of the output shaft 4 is fixedly connected with a propeller 5.So, output shaft 4 and spiral shell
The combination of oar 5 is revolved equivalent to tube-axial fan, and propeller 5 can produce larger air quantity in running at high speed, and it is more to scatter away brushless electric machine
Heat.
In one embodiment, as shown in Figures 4 to 7, the drive end bearing bracket 1 includes integrally formed drive end bearing bracket body 11 and determined
Sub- inner sleeve 12.Multiple heat emission holes 111 and multiple extraction string holes 112, multiple radiatings are provided with the drive end bearing bracket body 11
Hole 111 is arranged alternately in a circumferential direction with multiple extraction string holes 112.Stator inner sleeve 12 is the tubular body of inner hollow.
In embodiment shown in Fig. 5, heat emission hole 111 is oval.
However, in other some embodiments shown, the shape of heat emission hole 111 can also be its in addition to ellipse
Its regular shape (square, circular etc.).Either, in other some embodiments shown, heat emission hole 111 is irregular shape
Shape.
Herein, it is preferable that as shown in Figures 4 and 5, multiple heat emission holes 111 are arranged at equal intervals in a circumferential direction, more
The individual extraction string holes 112 is arranged at equal intervals in a circumferential direction.For example, in the embodiment shown in fig. 5, the drive end bearing bracket sheet
Four heat emission holes 111 are provided with body 11 and four extraction string holes 112, four heat emission holes 111 are spaced in a circumferential direction
90 degree of arrangements, four string holes 112 of drawing are in the arrangement of 90 degree of circumferencial direction interval.So, the lead-out wire of brushless electric machine can be with
Any one extraction in string holes 112 is drawn from four, i.e. four direction can outlet so that the outlet method spirit of the brushless electric machine
It is living.In addition, the extraction string holes 112 of not outlet can then be used as auxiliary heat dissipation hole to use.
In one embodiment, as shown in Figures 4 and 5, it is provided with threaded mounting hole 113 on the drive end bearing bracket body 11.Spiral shell
Line mounting hole 113 can be used for being threadedly coupled with test fixture when external propeller base or electromechanical testing.
Fig. 6 to Figure 12 shows the brushless electric machine of another embodiment of the utility model.
As shown in fig. 7, the leading inside of the stator inner sleeve 12 is provided with columned fore bearing room 121, the stator
The rear inside of inner sleeve 12 is provided with columned rear bearing chamber 122.Shape between the fore bearing room 121 and rear bearing chamber 122
Into columned middle cavity 123, i.e. the inner chamber of stator inner sleeve 12 include be sequentially communicated from front to back fore bearing room 121, in
Between cavity 123 and rear bearing chamber 122.
In addition, as shown in fig. 7, the internal diameter of middle cavity 123 is less than the internal diameter of fore bearing room 121 and rear bearing chamber 122, with
Foreground terrace 124 is formed in the position that middle cavity 123 connects with fore bearing room 121, and, in middle cavity 123 and front axle
Hold the position that room 121 connects and form backstage terrace 125.Fore bearing 6, the rear bearing chamber are provided with the fore bearing room 121
Rear bearing 7 is provided with 122.The inner ring of the fore bearing 6 and rear bearing 7 is installed on the output shaft 4, described with this
Output shaft 4 is by the fore bearing 6 and the rear rotational support of bearing 7 on the drive end bearing bracket 1.
The rear and front end of stator inner sleeve 12 sets fore bearing room 121 and rear bearing chamber 122 respectively, it is ensured that fore bearing room
121 and the tolerance of rear bearing chamber 122, make fore bearing room 121 and the axiality of rear bearing chamber 122 higher.
In addition, as shown in Fig. 8 to 12, the first circlip groove 126 is provided with the front inner wall of the fore bearing room 121, it is described
Be provided with circlip for hole 8 in first circlip groove 126, the circlip for hole 8 and foreground terrace 124 be resisted against it is described before
The outer ring both sides of bearing 6, to limit the axial movement of the outer ring of fore bearing 6.The shaft shoulder 41 is arranged at intervals with the output shaft 4
And second circlip groove 42, it is provided with second circlip groove 42 and clamps back-up ring 9, the clamping back-up ring 9 and the shaft shoulder 41 is resisted against
The inner ring front and rear sides of the fore bearing 6, to limit the axial movement of the inner ring of the fore bearing 6.So, fore bearing 6 is complete
It is fixed.It is described after bearing 7 outer ring on front side of be resisted against on the backstage terrace 125, it is described after bearing 7 outer ring on rear side of with it is described
The front space of center projection 321 is relative.So, rear bearing 7 can move about on output shaft 4, on rear side of the outer ring of the rear bearing 7
Gap between the front end of the center projection 321 can make up the deformation caused by the stationary part overheat of brushless electric machine.This
The bearing assembling structure of sample can cause motor run at high speed and prolonged running in more steady, safety.
According to the brushless electric machine of the utility model above-described embodiment, the centrifugal flabellum structure of hollow out is provided with rear end cap,
So when rear end cap rotates, the centrifugal flabellum structure of hollow out can form radial air flow and follow equivalent to centrifugal fan, during rotation
Ring air channel, and then the more heats of brushless electric machine are scattered away by larger air quantity caused by centrifugal flabellum structure, avoid brushless electric machine
Temperature is too high during work.
On the other hand, the embodiment of the utility model one also provides a kind of unmanned plane, and it includes the brushless electricity of above-described embodiment
Machine.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (13)
- A kind of 1. brushless electric machine, it is characterised in that including drive end bearing bracket, casing, rear end cap and output shaft, the drive end bearing bracket and rear end Lid is arranged on the both ends of the casing, and the output shaft rotation is supported on the drive end bearing bracket, the rear end of the output shaft and institute State rear end cap to be fixedly connected, the front end of the output shaft passes the drive end bearing bracket, and the rear end of the casing is consolidated with the rear end cap Fixed connection, the rear end cap include the centrifugal flabellum structure of rear end cap body and the hollow out being arranged on the rear end cap body.
- 2. brushless electric machine according to claim 1, it is characterised in that the rear end cap body includes ring body and positioned at described End plate on rear side of ring body, the centrifugal flabellum structure setting is between the ring body and end plate.
- 3. brushless electric machine according to claim 2, it is characterised in that the centrifugal flabellum structure includes center projection and more Individual centrifuge blade, the centrifuge blade is arranged on the front side of the end plate and radially extending along the center projection, described The inner of centrifuge blade is connected on the center projection, and the outer end of the centrifuge blade is connected to the ring body and the rear end Between plate, form hollow hole between the outer end of the two neighboring centrifuge blade, the hollow hole be located at the ring body with it is described Between the edge of end plate.
- 4. brushless electric machine according to claim 3, it is characterised in that between multiple centrifuge blades wait in a circumferential direction Every arrangement.
- 5. brushless electric machine according to claim 1, it is characterised in that the rear inside of the casing is provided with internal thread, The forward edge of the ring body formed with the multiple threaded blocks being intervally arranged in a circumferential direction, multiple threaded blocks with it is described The rear end threaded connection of casing.
- 6. brushless electric machine according to claim 1, it is characterised in that the rear end of the output shaft is provided with external screw thread, institute State the inner hollow of center projection and be provided with internal thread, the rear end of the output shaft is threaded in the center projection.
- 7. brushless electric machine according to claim 1, it is characterised in that the outer surface of the casing is provided with helical form radiating Groove.
- 8. brushless electric machine according to claim 1, it is characterised in that the front end of the output shaft is fixedly connected with a spiral Oar.
- 9. brushless electric machine according to claim 1, it is characterised in that the drive end bearing bracket includes integrally formed drive end bearing bracket sheet Body and stator inner sleeve.
- 10. brushless electric machine according to claim 9, it is characterised in that be provided with multiple radiatings on the drive end bearing bracket body Hole and multiple extraction string holes, multiple heat emission holes are arranged alternately in a circumferential direction with multiple extraction string holes；Multiple heat emission holes are arranged at equal intervals in a circumferential direction, and multiple extraction string holes are arranged at equal intervals in a circumferential direction Cloth.
- 11. brushless electric machine according to claim 10, it is characterised in that four radiatings are provided with the drive end bearing bracket body Hole and four extraction string holes, four heat emission holes are spaced 90 degree of arrangements in a circumferential direction, and four string holes of drawing are in circle The arrangement of 90 degree of circumferential direction interval.
- 12. brushless electric machine according to claim 9, it is characterised in that screw thread installation is provided with the drive end bearing bracket body Hole.
- 13. a kind of unmanned plane, it is characterised in that including the brushless electric machine described in claim 1-12 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721030947.2U CN207150294U (en) | 2017-08-17 | 2017-08-17 | Brushless electric machine and unmanned plane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721030947.2U CN207150294U (en) | 2017-08-17 | 2017-08-17 | Brushless electric machine and unmanned plane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207150294U true CN207150294U (en) | 2018-03-27 |
Family
ID=61665750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721030947.2U Active CN207150294U (en) | 2017-08-17 | 2017-08-17 | Brushless electric machine and unmanned plane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207150294U (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 |
-
2017
- 2017-08-17 CN CN201721030947.2U patent/CN207150294U/en active Active
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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