CN204721125U - Brushless motor outer rotor - Google Patents
Brushless motor outer rotor Download PDFInfo
- Publication number
- CN204721125U CN204721125U CN201520352964.2U CN201520352964U CN204721125U CN 204721125 U CN204721125 U CN 204721125U CN 201520352964 U CN201520352964 U CN 201520352964U CN 204721125 U CN204721125 U CN 204721125U
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- CN
- China
- Prior art keywords
- brushless motor
- motor outer
- magnet steel
- rotor yoke
- outer rotor
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Abstract
The utility model discloses a kind of brushless motor outer rotor, comprise end cap, the rotor yoke of tubular and several magnet steel, described rotor yoke is arranged on the inner circumferential side of described end cap, and several described magnet steel interval is fitted on the inner circumferential side of described rotor yoke.Brushless motor outer rotor of the present utility model, is arranged in end cap by rotor yoke, and magnet steel is fitted on rotor yoke, can improve motor performance, and structure is simple, Simplified flowsheet and reducing costs.
Description
Technical field
The utility model relates to a kind of rotor structure, particularly relates to a kind of brushless motor outer rotor.
Background technology
DC brushless outer rotor motor is because power density is large, volume is little and be widely used in every field, but DC brushless motor cost is high, reduces its cost and improves its performance and become inexorable trend.
Current DC brushless motor outer-rotor structure generally comprises end cap, casing and magnet steel, first casing is fitted on end cap during manufacture, then at the magnet steel of the bonding some of casing inner ring.Wherein casing is processed by turning of steel tube, the laminating degree of magnet steel in order to have with casing inner ring, and magnet steel must make tile; In order to ensure the spacing between every sheet magnet steel, the tooth processing respective amount above end cap carrys out interval magnet steel, makes material cost high, complex process.
Utility model content
The technical problems to be solved in the utility model is, provides a kind of brushless motor outer rotor of improvement.
The utility model solves the technical scheme that its technical problem adopts: provide a kind of brushless motor outer rotor, comprise end cap, the rotor yoke of tubular and several magnet steel, described rotor yoke is arranged on the inner circumferential side of described end cap, and several described magnet steel interval is fitted on the inner circumferential side of described rotor yoke.
Preferably, the inner circumferential side of described rotor yoke is provided with the location notch at several interval, and several described magnet steel is contained in described location notch respectively;
Projection between adjacent described location notch forms the parting bead between adjacent described magnet steel.
Preferably, the bottom surface of described location notch is plane; Described magnet steel is tabular.
Preferably, the bottom surface of described location notch is arcwall face; Described magnet steel is tile.
Preferably, described end cap comprises cylindrical body and is integrally connected to the lid of described cylindrical body one open end, and described rotor yoke is arranged on the inner circumferential side of described cylindrical body.
Preferably, one end inner circumferential that described cylindrical body connects described lid is also provided with limited step, and described rotor yoke is connected on described limited step in described cylindrical body.
Preferably, described lid comprises several plates, and several described plates are radially connected and are integrally connected on an open end of described cylindrical body.
Preferably, described rotor yoke is the stamping forming tubular structure of silicon steel sheet.
Preferably, this external rotor also comprises the rotating shaft be connected on described end cap medium position.
Preferably, described rotating shaft is coaxial with described rotor yoke.
Brushless motor outer rotor of the present utility model, is arranged in end cap by rotor yoke, and magnet steel is fitted on rotor yoke, can improve motor performance, and structure is simple, Simplified flowsheet and reducing costs.
In addition, end cap can integrally casting and be molded over rotor yoke periphery, further Simplified flowsheet; Due to the setting of rotor yoke, magnet steel can be set as tabular, low compared with the setup cost in tile.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of the brushless motor outer rotor of the utility model one embodiment;
Fig. 2 is the structural representation of end cap in Fig. 1;
Fig. 3 is the structural representation of Fig. 1 rotor yoke;
Fig. 4 is the structural representation of magnet steel in Fig. 1.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As Figure 1-3, the brushless motor outer rotor of the utility model one embodiment, comprise end cap 10, the rotor yoke 20 of tubular and several magnet steel 30, rotor yoke 20 is arranged on the inner circumferential side of end cap 10, several magnet steel 30 interval is fitted on the inner circumferential side of rotor yoke 20, thus magnet steel 30 is arranged in end cap 10 by rotor yoke 20, does not need directly to be fitted in end cap 10, technique is simple and cost is low, and can improve motor performance.
End cap 10 can comprise cylindrical body 11 and lid 12, the both ends open of cylindrical body 11, and lid 12 is integrally connected to this cylindrical body 11 1 open end.This end cap 10 passes through casting.Wherein, one end inner circumferential that cylindrical body 11 connects lid 12 also can be provided with limited step 13, and rotor yoke 20 is connected on limited step 13 in cylindrical body 11.
In the present embodiment, lid 12 comprises several plates 121, and several plates 121 are radially connected and are integrally connected on an open end of cylindrical body 11.Gap between plates 121 can form louvre.
Rotor yoke 20 is arranged on the inner circumferential side of cylindrical body 11; The axial width of rotor yoke 20 is less than the axial width of cylindrical body 11, entirety can be contained in cylindrical body 11 inside to make rotor yoke 20.The inner circumferential side of rotor yoke 20 is provided with the location notch 21 at several interval, and several magnet steel 30 is contained in location notch 21 respectively.Projection 22 between adjacent location notch 21 forms the parting bead between adjacent magnet steel 30.
Several location notch 21 is arranged on the inner circumferential side of rotor yoke 20 along the circle spacing of rotor yoke 20, and several magnet steel 30 is distributed on the inner circumferential side of rotor yoke 20 by being engaged in location notch 21.The quantity of location notch 21 and magnet steel 30 can be determined according to actual conditions.
Preferably, rotor yoke 20 can be the stamping forming tubular structure of silicon steel sheet; Several location notch 21 is formed on the inner circumferential side of tubular structure by punching press.
As shown in Figure 3,4, in the present embodiment, the bottom surface of location notch 21 is plane; Magnet steel 30 can be in flat magnetic links or magnet steel bar, and such magnet steel 30 makes simple compared with the magnet steel in tile and cost is low.
Understandably, in other embodiments, the bottom surface of location notch 21 is also arcwall face; Magnet steel 30 also can be tile.
Further, this brushless motor outer rotor also can comprise the rotating shaft (not shown) be connected on end cap 10 medium position; Rotating shaft and rotor yoke 20, cylindrical body 11 are coaxially arranged.Can be provided with hole in the middle part of the lid 12 of end cap 10 and rotating shaft is connected, rotating shaft one end is connected on hole, the other end extends to cylindrical body 11 direction.
When the brushless motor outer rotor of the present embodiment manufactures, subpunch swaging can become rotor yoke 20, then rotor yoke 20 is placed in the mould of end cap 10, pour end cap moulding material into, by one-body molded for end cap 20 in rotor yoke 20 periphery; Finally be assembled to by magnet steel 30 in the location notch 21 of rotor yoke 20 inner circumferential side, technique is simple.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a brushless motor outer rotor, it is characterized in that, comprise end cap (10), the rotor yoke (20) of tubular and several magnet steel (30), described rotor yoke (20) is arranged on the inner circumferential side of described end cap (10), and several described magnet steel (30) interval is fitted on the inner circumferential side of described rotor yoke (20).
2. brushless motor outer rotor according to claim 1, is characterized in that, the inner circumferential side of described rotor yoke (20) is provided with the location notch (21) at several interval, and several described magnet steel (30) is contained in described location notch (21) respectively;
Projection (22) between adjacent described location notch (21) forms the parting bead between adjacent described magnet steel (30).
3. brushless motor outer rotor according to claim 2, is characterized in that, the bottom surface of described location notch (21) is plane; Described magnet steel (30) is in tabular.
4. brushless motor outer rotor according to claim 2, is characterized in that, the bottom surface of described location notch (21) is arcwall face; Described magnet steel (30) is in tile.
5. brushless motor outer rotor according to claim 1, it is characterized in that, described end cap (10) comprises cylindrical body (11) and is integrally connected to the lid (12) of described cylindrical body (11) open end, and described rotor yoke (20) is arranged on the inner circumferential side of described cylindrical body (11).
6. brushless motor outer rotor according to claim 5, it is characterized in that, one end inner circumferential that described cylindrical body (11) connects described lid (12) is also provided with limited step (13), and described rotor yoke (20) is connected on described limited step (13) in described cylindrical body (11).
7. brushless motor outer rotor according to claim 5, it is characterized in that, described lid (12) comprises several plates (121), and several described plates (121) are radially connected and are integrally connected on an open end of described cylindrical body (11).
8. brushless motor outer rotor according to claim 1, is characterized in that, described rotor yoke (20) is the stamping forming tubular structure of silicon steel sheet.
9. the brushless motor outer rotor according to any one of claim 1-8, is characterized in that, this external rotor also comprises the rotating shaft be connected on described end cap (10) medium position.
10. brushless motor outer rotor according to claim 9, is characterized in that, described rotating shaft is coaxial with described rotor yoke (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520352964.2U CN204721125U (en) | 2015-05-27 | 2015-05-27 | Brushless motor outer rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520352964.2U CN204721125U (en) | 2015-05-27 | 2015-05-27 | Brushless motor outer rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204721125U true CN204721125U (en) | 2015-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520352964.2U Active CN204721125U (en) | 2015-05-27 | 2015-05-27 | Brushless motor outer rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204721125U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533107A (en) * | 2016-11-15 | 2017-03-22 | 宁波金洪胜机电科技有限公司 | External rotor motor |
| CN110212663A (en) * | 2019-06-19 | 2019-09-06 | 宁波富佳实业股份有限公司 | Outer rotor brushless motor |
| CN110810317A (en) * | 2018-08-13 | 2020-02-21 | 浙江富地机械有限公司 | Direct-driven impeller type aerator |
| WO2021179435A1 (en) * | 2020-03-10 | 2021-09-16 | 深圳拓邦股份有限公司 | Brushless electric motor |
-
2015
- 2015-05-27 CN CN201520352964.2U patent/CN204721125U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533107A (en) * | 2016-11-15 | 2017-03-22 | 宁波金洪胜机电科技有限公司 | External rotor motor |
| CN110810317A (en) * | 2018-08-13 | 2020-02-21 | 浙江富地机械有限公司 | Direct-driven impeller type aerator |
| CN110212663A (en) * | 2019-06-19 | 2019-09-06 | 宁波富佳实业股份有限公司 | Outer rotor brushless motor |
| WO2021179435A1 (en) * | 2020-03-10 | 2021-09-16 | 深圳拓邦股份有限公司 | Brushless electric motor |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |