CN213693258U - Brushless motor outer rotor structure for unmanned aerial vehicle - Google Patents
Brushless motor outer rotor structure for unmanned aerial vehicle Download PDFInfo
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- CN213693258U CN213693258U CN202022931676.6U CN202022931676U CN213693258U CN 213693258 U CN213693258 U CN 213693258U CN 202022931676 U CN202022931676 U CN 202022931676U CN 213693258 U CN213693258 U CN 213693258U
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Abstract
The utility model relates to the technical field of electric machines, in particular to brushless motor outer rotor structure for unmanned aerial vehicle. The stator comprises a stator seat, an iron core sleeved on the periphery of the stator seat and a rotor assembly penetrating through the stator seat and covering the outer side of the iron core; the stator comprises a rotor assembly, a stator seat and a stator seat, wherein a containing groove is formed in the stator seat, a rotating assembly rotatably connected with the rotor assembly is arranged in the containing groove, and a limiting assembly used for fixing the rotating assembly is arranged in the containing groove. Realize the rotor subassembly through rotating assembly and reduce radial offset when rotatory, guarantee that the rotor subassembly can receive great power in the axial, ensure that the rotor subassembly is difficult for taking place to rock at rotatory working process, eliminate the axial clearance of rotating assembly and stator seat through spacing subassembly, the drunkenness about avoiding the rotor subassembly rotatory, guarantee operating stability.
Description
Technical Field
The utility model relates to the technical field of electric machines, in particular to brushless motor outer rotor structure for unmanned aerial vehicle.
Background
Unmanned aerial vehicle utilizes the equipment of radio remote control equipment and the control of self-contained program control device, and the motor as main spare part mostly uses brushless motor structure, and current brushless motor's output torque is less, and the fuselage is heavier, and the energy consumption is higher, is unfavorable for lasting flight for a long time. And, current brushless motor rotor shaft tightly through the axle sleeve installation, under long-time work or the too big condition of voltage high load, takes place to become flexible, squint, drop easily, and the rotor shaft takes place to rock easily, the drunkenness influences unmanned aerial vehicle flight balance in the course of the work.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an invention aim at provides a brushless motor outer rotor structure for unmanned aerial vehicle, adopts the utility model provides a technical scheme has solved current brushless motor rotor shaft and has tightly passed through the axle sleeve installation, and the problem that long-time work takes place to become flexible and drop easily.
In order to solve the technical problem, the utility model provides a brushless motor outer rotor structure for unmanned aerial vehicle, which comprises a stator seat, an iron core sleeved on the periphery of the stator seat, and a rotor assembly penetrating through the stator seat and covering the outer side of the iron core; the stator comprises a rotor assembly, a stator seat and a stator seat, wherein a containing groove is formed in the stator seat, a rotating assembly connected with the rotor assembly in a rotating mode is arranged in the containing groove, and a limiting assembly used for limiting the position of the rotating assembly is arranged in the containing groove.
Preferably, the rotating assembly comprises a plurality of deep groove ball bearings and an angular contact bearing which are sequentially embedded in the accommodating groove, a step used for limiting the deep groove ball bearings is formed on the end face of the stator seat, and the limiting assembly abuts against the end face of the angular contact bearing.
Preferably, the rotor assembly comprises a rotating shaft which can be rotatably penetrated in the rotating assembly, an end cover which is fixedly arranged on the rotating shaft, and a machine shell which is fixedly connected with the end cover; and a plurality of annular array magnets are fixed on the inner side surface of the shell.
Preferably, the inside wall of the accommodating groove is provided with a positioning groove, and the limiting assembly comprises an elastic retainer ring embedded in the positioning groove, a bearing cover sleeved on the rotating shaft and abutted against the end face of the angular contact bearing, and a locknut in threaded connection with the end part of the rotating shaft.
Preferably, a boss for bearing the iron core is formed at the bottom of the periphery of the stator seat, and an upper stator cover for fixing the iron core is sleeved at the upper end of the periphery of the stator seat; the stator upper cover is in interference fit with the stator seat.
Preferably, a plurality of annular array windings are wound on the iron core, and a plurality of notches are formed in the iron core on the inner sides of the windings.
Preferably, the end cover is provided with a clearance groove.
Preferably, the inner side of the casing is provided with a gap strip for spacing the magnets.
From the above, use the utility model provides a can obtain following beneficial effect: through establishing the iron core at stator seat periphery cover, wear to put the rotor subassembly on the stator seat, the rotor subassembly covers the outside in the iron core, the inside storage tank that is formed with of stator seat, install the runner assembly who rotates with the rotor subassembly and be connected in the storage tank, be provided with the spacing subassembly that is used for fixed runner assembly in the storage tank, realize through the runner assembly that the rotor subassembly reduces radial offset when rotatory, guarantee that the rotor subassembly can receive great power in the axial, ensure that the rotor subassembly is difficult for taking place to rock at rotatory working process, eliminate the axial clearance of runner assembly and stator seat through spacing subassembly, the drunkenness about when avoiding the rotor subassembly rotatory, guarantee operating stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive faculty.
Fig. 1 is a sectional view of an outer rotor structure of a brushless motor for an unmanned aerial vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an outer rotor structure of a brushless motor for an unmanned aerial vehicle according to an embodiment of the present invention
Fig. 3 is a cross-sectional view of a stator base according to an embodiment of the present invention.
Fig. 4 is a schematic view of an inner side structure of a housing according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to solve the above technical problems, the present embodiment provides an outer rotor structure of a brushless motor for an unmanned aerial vehicle, as shown in fig. 1, including a stator base 10, an iron core 11 sleeved on an outer periphery of the stator base 10, and a rotor assembly 20 penetrating the stator base 10, wherein the rotor assembly 20 covers an outer side of the iron core 11, an accommodating groove 14 is formed inside the stator base 10, a rotating assembly 30 rotatably connected to the rotor assembly 20 is installed in the accommodating groove 14, a limiting assembly 40 for fixing the rotating assembly 30 is disposed in the accommodating groove 14, a radial offset of the rotor assembly 20 is reduced when the rotor assembly 20 rotates by the rotating assembly 30, it is ensured that the rotor assembly 20 can bear a large force in an axial direction, it is ensured that the rotor assembly 20 is not easily shaken during a rotating operation, an axial gap between the rotating assembly 30 and the stator base 10 is eliminated by the limiting assembly 40, and, and the operation stability is ensured.
Specifically, the rotor assembly 20 includes a rotating shaft 21 rotatably inserted in the rotating assembly 30, an end cover 22 fixedly disposed on the rotating shaft 21, and a casing 23 fixedly connected to the end cover 22, wherein a plurality of annular arrays of magnets 24 are fixed on an inner side surface of the casing 23, as shown in fig. 4, a gap strip 231 for spacing the magnets 24 is disposed on an inner side of the casing 23, and after the magnets 24 are disposed in the casing 23 after dispensing, the gap strip 231 is disposed, so that mutual attraction and dislocation between the magnets 24 are avoided by the gap strip 231, and radial loosening during high-speed rotation is avoided.
In order to realize that the rotor assembly 20 can be rotatably disposed on the stator base 10, as shown in fig. 3, an accommodating groove 14 is formed inside the stator base 10, the rotating assembly 30 includes a plurality of deep groove ball bearings 32 and an angular contact bearing 31 which are sequentially embedded in the accommodating groove 14, in this embodiment, three deep groove ball bearings 32 and one angular contact bearing 31 are adopted, a step 15 for limiting the deep groove ball bearings 32 is formed on an end surface of the stator base 10, the three deep groove ball bearings 32 and the one angular contact bearing 31 are sequentially placed in the accommodating groove 14, the limiting assembly 40 abuts against an end surface of the angular contact bearing 31, thereby realizing that three deep groove ball bearings 32 and one angular contact bearing 31 are fixed between the limiting component 40 and the step 15, three deep groove ball bearings 32 and one angular contact bearing 31 are connected with the rotating shaft 21, so that the radial offset of the rotating shaft 21 is reduced when the rotating shaft 21 rotates, and the rotating shaft 21 can bear larger force in the axial direction.
Further, in order to prevent the three deep groove ball bearings 32 and the one angular contact bearing 31 from loosening and falling off, the positioning groove 16 is formed in the inner side wall of the accommodating groove 14 of the stator base 10, and the limiting assembly 40 includes a circlip 41 embedded in the positioning groove 16, a bearing cover 42 sleeved on the rotating shaft 21 and abutted against the angular contact bearing 31, and a locknut 43 in threaded connection with the end of the rotating shaft 21. When the elastic retainer ring 41 is assembled into the receiving groove 14, the outer diameter is reduced due to elastic deformation under stress, and the elastic retainer ring is restored after being embedded into the positioning groove 16, and the end part of the rotating shaft 21 is sleeved with the bearing cover 42 abutted to the angular contact bearing 31, so that the axial clearance between the rotating assembly 30 and the stator seat 10 is eliminated, the rotating shaft 21 is prevented from moving up and down during rotation, and the operation stability is improved.
The bottom in stator seat 10 periphery is formed with the boss 17 that is used for bearing iron core 11, and the pot head in stator seat 10 periphery is equipped with the stator upper cover 13 that is used for fixed iron core 11, and the winding 12 that has a plurality of annular array on the outside of iron core 11, stator upper cover 13 and stator seat 10 interference fit fix iron core 11 in the periphery of stator seat 10 through stator upper cover 13, avoid iron core 11 atress pine to take off in the course of the work.
As shown in fig. 2, in order to reduce the overall weight, a plurality of slots 17 are formed in the core 11 at the inner side of the winding 12 to reduce the weight of the core 11, so that the overall machine is lighter, and meanwhile, a clearance groove is formed in the end cover 22 to reduce the weight of the rotor assembly 20, and to avoid the parts on the stator base 10 to reserve a safe clearance.
To sum up, the utility model discloses the scheme is through establishing the iron core at stator seat periphery cover, wear to put the rotor subassembly on the stator seat, the rotor subassembly covers in the outside of iron core, the inside storage tank that is formed with of stator seat, install the runner assembly who rotates to be connected with the rotor subassembly in the storage tank, be provided with the spacing subassembly that is used for fixed runner assembly in the storage tank, realize through the runner assembly that the rotor subassembly reduces radial offset when rotatory, guarantee that the rotor subassembly can receive great power in the axial, ensure that the rotor subassembly is difficult for taking place to rock at rotatory working process, eliminate the axial clearance of runner assembly and stator seat through spacing subassembly, the drunkenness about when avoiding the rotor subassembly to rotate, guarantee the operating stability.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (8)
1. The utility model provides a brushless motor outer rotor structure for unmanned aerial vehicle which characterized in that: the stator comprises a stator seat (10), an iron core (11) sleeved on the periphery of the stator seat (10), and a rotor assembly (20) penetrating through the stator seat (10) and covering the outer side of the iron core (11); an accommodating groove (14) is formed in the stator seat (10), a rotating assembly (30) rotatably connected with the rotor assembly (20) is arranged in the accommodating groove (14), and a limiting assembly (40) used for limiting the position of the rotating assembly (30) is arranged in the accommodating groove (14).
2. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 1, wherein: the rotating assembly (30) comprises a plurality of deep groove ball bearings (32) and angular contact bearings (31) which are sequentially embedded in the accommodating groove (14), steps (15) used for limiting the deep groove ball bearings (32) are formed on the end face of the stator seat (10), and the limiting assembly (40) abuts against the end face of the angular contact bearings (31).
3. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 2, wherein: the rotor assembly (20) comprises a rotating shaft (21) which can be rotatably penetrated in the rotating assembly (30), an end cover (22) which is fixedly arranged on the rotating shaft (21), and a machine shell (23) which is fixedly connected with the end cover (22); and a plurality of annular-array magnets (24) are fixed on the inner side surface of the shell (23).
4. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 3, wherein: the locating groove (16) is formed in the inner side wall of the containing groove (14), and the limiting component (40) comprises an elastic retainer ring (41) clamped in the locating groove (16), a bearing cover (42) sleeved on the rotating shaft (21) and abutted against the end face of the angular contact bearing (31), and a locknut (43) in threaded connection with the end portion of the rotating shaft (21).
5. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 2, wherein: a boss (17) used for bearing the iron core (11) is formed at the bottom of the periphery of the stator seat (10), and a stator upper cover (13) used for fixing the iron core (11) is sleeved at the upper end of the periphery of the stator seat (10); the stator upper cover (13) is in interference fit with the stator seat (10).
6. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 5, wherein: the iron core (11) is wound with a plurality of groups of annular array windings (12), and a plurality of notches (18) are formed in the inner side of the windings (12) on the iron core (11).
7. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 3, wherein: the end cover (22) is provided with a clearance groove.
8. The outer rotor structure of the brushless motor for the unmanned aerial vehicle according to claim 3, wherein: the inner side of the shell (23) is provided with a gap strip (231) for spacing the magnets (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022931676.6U CN213693258U (en) | 2020-12-07 | 2020-12-07 | Brushless motor outer rotor structure for unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022931676.6U CN213693258U (en) | 2020-12-07 | 2020-12-07 | Brushless motor outer rotor structure for unmanned aerial vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN213693258U true CN213693258U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022931676.6U Active CN213693258U (en) | 2020-12-07 | 2020-12-07 | Brushless motor outer rotor structure for unmanned aerial vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839538A (en) * | 2021-09-29 | 2021-12-24 | 东莞市吉铼升电机股份有限公司 | Brushless motor of rotating robot |
| CN114094771A (en) * | 2021-09-07 | 2022-02-25 | 上海汇众汽车制造有限公司 | Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same |
-
2020
- 2020-12-07 CN CN202022931676.6U patent/CN213693258U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094771A (en) * | 2021-09-07 | 2022-02-25 | 上海汇众汽车制造有限公司 | Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same |
| CN113839538A (en) * | 2021-09-29 | 2021-12-24 | 东莞市吉铼升电机股份有限公司 | Brushless motor of rotating robot |
| CN113839538B (en) * | 2021-09-29 | 2023-03-24 | 东莞市吉铼升电机股份有限公司 | Brushless motor of rotating robot |
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Address after: 516213 No. 1, Honglian Industrial Park, Sanhe Economic Development Experimental Zone, Huiyang, Huizhou City, Guangdong Province Patentee after: Huizhou Longde Technology Co.,Ltd. Address before: 516213 Honglian Industrial Park, Sanhe Economic Development Experimental Zone, Huiyang City, Huizhou City, Guangdong Province Patentee before: LODA TECHNOLOGY Co.,Ltd. |