CN214707383U - Brushless motor for unmanned aerial vehicle - Google Patents
Brushless motor for unmanned aerial vehicle Download PDFInfo
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- CN214707383U CN214707383U CN202120802277.1U CN202120802277U CN214707383U CN 214707383 U CN214707383 U CN 214707383U CN 202120802277 U CN202120802277 U CN 202120802277U CN 214707383 U CN214707383 U CN 214707383U
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- aerial vehicle
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Abstract
The utility model provides a brushless motor for unmanned aerial vehicle, this brushless motor for unmanned aerial vehicle includes the stator, rotor and bearing, the stator includes support piece and electro-magnet, the electro-magnet sets up on support piece, the rotor includes the magnet, casing and upper end cover, the upper end cover is located the upper portion of casing, support piece sets up the lower part at the casing, the magnet sets up the inside at the casing, the upper end cover is used for driving the bearing and rotates, the bearing includes rotation axis, bearing inner circle and bearing inner race, be provided with the roller between bearing inner circle and bearing inner circle integrated into one piece. Through with rotation axis and bearing inner race integrated into one piece, can be so that rotation axis and bearing inner race can bear bigger axial load to promote the durability of bearing inner race, prolong the life of bearing.
Description
Technical Field
The utility model belongs to the motor field especially relates to a brushless motor for unmanned aerial vehicle.
Background
The brushless motor is a typical mechatronic product, and is composed of a motor main body driver. Because the brushless motor operates in a self-control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under the condition of heavy load under the condition of variable frequency speed regulation, and oscillation and step-out can not be generated when the load suddenly changes. Because brushless motor has small, be difficult to produce the characteristics of vibration and step-out, consequently, brushless motor often is used in unmanned aerial vehicle, provides power for unmanned aerial vehicle's screw.
Brushless motor includes stator, rotor and bearing, and the rotor is used for drive bearing to rotate, and the upper end cover in the rotor is connected with unmanned aerial vehicle's flabellum, for the flabellum provides power, and the flabellum rotates, provides ascending lift for unmanned aerial vehicle. The bearing plays a supporting role in the rotation process of the brushless motor and prevents the rotor from deviating, and the bearing comprises a rotating shaft, a bearing inner ring and a bearing outer ring.
However, in current brushless motor, be separately connected between rotation axis and the bearing inner race, at unmanned aerial vehicle's operation in-process, if the rotational speed of motor is too fast, the bearing inner race can bear great load to influence the life of bearing.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a brushless motor includes the stator, rotor and bearing, the stator includes support piece and electro-magnet, the electro-magnet sets up on support piece, the rotor includes the magnet, casing and upper end cover, the upper end cover is located the upper portion of casing, support piece sets up the lower part at the casing, the magnet sets up the inside at the casing, the upper end cover is used for driving the bearing and rotates, the bearing includes rotation axis, bearing inner circle and bearing inner race, be provided with the roller between bearing inner circle and bearing inner race, rotation axis and bearing inner circle integrated into one piece.
In the above scheme, the rotating shaft and the bearing inner ring are integrally formed, and when the brushless motor operates, the bearing rotates at a high speed, and at the moment, the bearing inner ring needs to bear a large load. Because the bearing inner ring and the rotating shaft are integrated, not only the bearing inner ring bears load at the moment, but also the rotating shaft can help the bearing inner ring to bear the load borne by the bearing inner ring together, so that the load borne by the bearing inner ring can be partially shared by the rotating shaft, and the load borne by the bearing inner ring is reduced. Through with rotation axis and bearing inner race integrated into one piece, can be so that rotation axis and bearing inner race can bear bigger axial load to promote the durability of bearing inner race, prolong the life of bearing.
Preferably, the rotating shaft is provided with an inner rolling groove, the inner side wall of the bearing outer ring is provided with an outer rolling groove, and the roller is arranged between the inner rolling groove and the outer rolling groove.
In the scheme, the rolling bearing can reduce the resistance in the rotating process, so that the rotating speed of the bearing can be faster.
The electromagnet comprises an iron core and a winding coil, wherein the iron core is arranged inside the winding coil.
In the above scheme, the iron core is arranged in the electromagnet to increase the magnetic field intensity generated by the electromagnet in the electrifying process, so that the rotor can obtain a higher rotating speed when rotating.
The bearing outer ring is arranged on the support piece, the bearing outer ring is arranged on the bearing outer ring, and the bearing outer ring is arranged on the bearing outer ring.
In the above scheme, the upper end butt of bearing inner race is on the flange, and the lower extreme butt is on the fender lid for bearing inner race's upper and lower activity is restricted, can prevent rocking and the pine of bearing inner race from taking off, improves the reliability when brushless motor uses.
A further scheme is that the flanges are provided with more than two drainage grooves which are uniformly arranged along the circumferential direction of the flanges.
In above-mentioned scheme, when there is ponding inside the bearing, the water logging can be followed the water drainage tank and discharged, prevents that ponding from staying inside the bearing, causes the corruption to the bearing is inside.
According to a further scheme, the brushless motor for the unmanned aerial vehicle further comprises a bushing, and the bushing is used for connecting the upper end cover with the rotating shaft.
In above-mentioned scheme, set up the bush between upper end cover and rotation axis, the upper end cover passes through the bush and drives the rotation axis rotation, and the bush plays the effect of transition body, can transmit the moment of torsion of upper end cover for the rotation axis, and when the moment of torsion was too big, the bush can prevent to take place to loosen between upper end cover and the rotation axis because the moment of torsion is too big and take place to take off.
According to a further scheme, the brushless motor for the unmanned aerial vehicle further comprises a lower end cover, and the lower end cover is arranged at the bottom of the supporting piece.
The wiring harness assembly is arranged on the lower end cover, the circuit substrate is arranged in the lower end cover, and the wires are arranged in the wiring harness assembly and electrically connected with the circuit substrate.
In the above scheme, the wire harness assembly is used for accommodating wires, and the wires supply power to the circuit substrate. The circuit board is used for adjusting the current passing through the electrified coil, so that the rotating speed of the rotor is adjusted.
The further proposal is that the bottom of the lower end cover is provided with a positioning block, the positioning block is provided with a water leakage hole, and the water leakage hole is communicated with the bottom of the lower end cover.
In the above scheme, the water drainage tank drains residual accumulated water in the bearing onto the lower end cover, and then the accumulated water is drained out of the brushless motor through the water leakage hole in the lower end cover.
The brushless motor for the unmanned aerial vehicle further comprises a sealing element, wherein the sealing element is arranged between the rotating shaft and the bearing outer ring, and the sealing element is used for sealing the bearing.
It is still further preferred that the number of the sealing members is two, wherein one sealing member is disposed at the top of the bearing outer ring, and the other sealing member is disposed at the bottom of the bearing outer ring.
In above-mentioned scheme, the sealing member seals between rotation axis and the bearing inner race, can prevent that external dust, impurity or ponding from deepening inside the bearing to lead to the fact the corruption to the bearing is inside, influence the life of bearing.
The sealing element comprises a framework, a lip part and a gasket part, the framework is abutted to the rotating shaft, one end of the lip part is connected with the framework, the other end of the lip part is connected with the gasket part, and the gasket part is clamped into a clamping groove in the bearing outer ring.
In a further scheme, the fit between the framework and the rotating shaft is interference fit or transition fit.
In the above scheme, the cooperation between skeleton and the rotation axis is interference fit or transition fit, and the skeleton can be connected inseparabler with the rotation axis, and sealing performance can be better.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only for illustration
For those skilled in the art, other drawings can be obtained according to the embodiments of the present invention without creative work.
Fig. 1 is a schematic structural diagram of a brushless motor for an unmanned aerial vehicle according to an embodiment of the present invention.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Fig. 3 is an exploded view of a brushless motor for an unmanned aerial vehicle according to an embodiment of the present invention.
Fig. 4 is a sectional view of the bearing of the present invention taken along the direction a-a in fig. 1.
Fig. 5 is an enlarged view of a portion B in fig. 4.
Fig. 6 is a schematic structural diagram of a lower end cover according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
Referring to fig. 1 to 3, the brushless motor for an unmanned aerial vehicle according to the present embodiment includes a stator, a rotor, and a bearing. The brushless motor comprises an upper end cover 1, a lining 2, a rotating shaft 3, a shell 4, a magnet 5 arranged inside the shell 4, an electromagnet 6, a bearing outer ring 7, a supporting piece 8 and a lower end cover 9, wherein the stator comprises the supporting piece 8 and the electromagnet 6, and the electromagnet 6 is arranged on the supporting piece 8. The rotor includes magnet 5, casing 4 and upper end cover 1, and upper end cover 1 is located the upper portion of casing 4, and support piece 8 sets up in the lower part of casing 4, and magnet 5 sets up the inside at casing 4, and upper end cover 1 is used for driving the bearing and rotates. The bearing comprises a rotating shaft 3, a bearing inner ring 31 and a bearing outer ring 7, wherein rollers 10 are arranged between the bearing inner ring 31 and the bearing outer ring 7, and the rotating shaft 3 and the bearing inner ring 31 are integrally formed. A harness assembly 11 is provided in the lower cover 9, a circuit board 12 is provided in the lower cover 9, and a lead wire is housed in the harness assembly 11 and electrically connected to the circuit board 12. The liner 2 is fixed to the upper end cap 1 by fasteners 16. The bush 2 is used for transmitting the torque of the upper end cover 1 to the rotating shaft 3, the bush 2 plays a role of a transition body and can transmit the torque of the upper end cover 1 to the rotating shaft 3, and when the torque is too large, the bush 2 can prevent the loosening between the upper end cover 1 and the rotating shaft 3 due to the too large torque.
Referring to fig. 2, the electromagnet 6 includes a core 61 and a winding coil 62, and the core 61 is disposed inside the winding coil 62. The iron core 61 is provided inside the electromagnet 6 in order to increase the magnetic field strength generated by the electromagnet 6 during energization, so that the rotor can obtain a higher rotational speed when rotating. An inner rolling groove 311 is formed in the bearing inner race 31, an outer rolling groove 71 is formed in the inner side wall of the bearing outer race 7, and the roller 10 is disposed between the inner rolling groove 311 and the outer rolling groove 71. The rolling bearing can reduce the resistance in the rotating process, so that the rotating speed of the bearing can be faster.
Referring to fig. 3, the brushless motor for an unmanned aerial vehicle according to the present embodiment further includes a blocking cover 13, where the blocking cover 13 is disposed at the bottom of the supporting member 8, and a blocking edge 81 is disposed at the top of the supporting member 8. The upper end of the bearing outer ring 7 is abutted to the flange 81, and the lower end of the bearing outer ring 7 is abutted to the blocking cover 13, so that the up-and-down movement of the bearing outer ring 7 is limited, the bearing outer ring 7 can be prevented from shaking and loosening, and the reliability of the brushless motor in use is improved. The rib 81 is provided with three drainage grooves 82, and the three drainage grooves 82 are uniformly arranged along the circumferential direction of the rib 81. When there is ponding inside the bearing, ponding can be followed water drainage tank 82 and discharged, prevents that ponding from staying inside the bearing, causes the corruption to the bearing is inside.
In the present embodiment, the circuit board 12 energizes the electromagnet 6, and the electromagnet 6 generates a magnetic field. The magnet 5 starts to rotate under the action of the magnetic field of the electromagnet 6, and the magnet 5 drives the upper end cover 1 to rotate. The upper end cover 1 drives the rotation axis 3 to rotate, and the upper end cover 1 is connected with the unmanned aerial vehicle flabellum, and is unmanned aerial vehicle flabellum output power. The rotating shaft 3 plays a supporting role, so that the upper end cover 1 is prevented from deviating in the high-speed rotating process, and the rotating stability of the rotor is ensured. The rotating shaft 3 and the bearing inner race 31 are integrally formed, and when the brushless motor operates, the bearing rotates at a high speed, and the bearing inner race 31 needs to bear a large load. Since the bearing inner race 31 is integral with the rotary shaft 3, not only the bearing inner race 31 is subjected to the load at this time. The rotating shaft 3 also helps the bearing inner ring 31 to bear the load of the bearing inner ring 31 together, so that the load borne by the bearing inner ring 31 is partially shared by the rotating shaft 3, and the load borne by the bearing inner ring 31 is reduced. Through the rotation shaft 3 and the bearing inner ring 31 are integrally formed, the rotation shaft 3 and the bearing inner ring 31 can bear larger axial load, so that the durability of the bearing inner ring is improved, and the service life of the bearing is prolonged.
Referring to fig. 4 and 5, the brushless motor for an unmanned aerial vehicle according to the present embodiment further includes a sealing member 14, and the sealing member 14 is disposed between the rotating shaft 3 and the bearing outer ring 7 to seal the bearing. The number of the sealing members 14 is two, wherein one sealing member 14 is arranged on the top of the bearing outer ring 7, and the other sealing member 14 is arranged on the bottom of the bearing outer ring 7. The seal member 14 includes a backbone 141, a lip 142, and a gasket portion 143. The frame 141 abuts on the rotary shaft 3, one end of the lip 142 is connected to the frame 141, the other end of the lip 142 is connected to the washer 143, and the washer 143 is engaged in the engaging groove 72 of the bearing outer race 7. The skeleton 141 and the rotating shaft 3 are in interference fit or transition fit. Therefore, the framework 141 and the rotating shaft 3 can be connected more tightly, the gasket part 143 is clamped into the clamping groove 72, and the sealing element 14 can be ensured to have good sealing performance. Can prevent that external dust, impurity and ponding from permeating inside the bearing, cause the corruption to the bearing is inside to the life of extension bearing. It should be noted that the number of the sealing elements may be two or more, and is not limited to two, and the sealing elements may be clamped at both ends of the bearing outer ring 7, or may be clamped at the middle of the bearing outer ring 7, so as to enhance the sealing performance.
Referring to fig. 6, the brushless motor for the unmanned aerial vehicle provided by this embodiment further includes a positioning block 15, the positioning block 15 is disposed at the bottom of the lower end cover 9, a water leakage hole 17 is formed in the positioning block 15, and the water leakage hole 17 is communicated with the bottom of the lower end cover 9. The number of the positioning blocks 15 is four, the four positioning blocks 15 are distributed at the bottom of the lower end cover 9 in an array mode, and the water leakage holes 17 are arranged in one-to-one correspondence to the positioning blocks 15. It should be noted that the number of the positioning blocks is not limited to four, and may be other numbers as long as the positioning blocks are uniformly distributed at the bottom of the lower end cover 9.
In the scheme, the drainage groove 82 drains accumulated water remaining in the bearing onto the lower end cover 9, and then the accumulated water is drained out of the brushless motor through the water leakage holes 17 on the lower end cover 9. Therefore, accumulated water is prevented from remaining in the lower end cover 9 to pollute the circuit substrate 12 and influence the normal work of the circuit substrate 12.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. The utility model provides a brushless motor for unmanned aerial vehicle, includes stator, rotor and bearing, the stator includes support piece and electro-magnet, the electro-magnet sets up support piece is last, the rotor includes magnet, casing and upper end cover, the upper end cover is located the upper portion of casing, support piece sets up the lower part of casing, the magnet sets up the inside of casing, the upper end cover is used for driving the bearing rotates its characterized in that:
the bearing comprises a rotating shaft, a bearing inner ring and a bearing outer ring, wherein a roller is arranged between the bearing inner ring and the bearing outer ring, and the rotating shaft and the bearing inner ring are integrally formed.
2. The brushless motor for an unmanned aerial vehicle according to claim 1, wherein:
the bearing is characterized in that a rolling inner groove is formed in the rotating shaft, a rolling outer groove is formed in the inner side wall of the bearing outer ring, and the roller is arranged between the rolling inner groove and the rolling outer groove.
3. The brushless motor for an unmanned aerial vehicle according to claim 1, wherein:
the electromagnet comprises an iron core and a winding coil, wherein the iron core is arranged inside the winding coil.
4. The brushless motor for an unmanned aerial vehicle according to claim 1, wherein:
the bearing outer ring is arranged on the supporting piece, the bottom of the supporting piece is provided with a blocking cover, the top of the supporting piece is provided with a blocking edge, the upper end of the bearing outer ring is abutted to the blocking edge, and the lower end of the bearing outer ring is abutted to the blocking cover.
5. The brushless motor for the unmanned aerial vehicle according to claim 4, wherein:
the water draining grooves are formed in the flanges, the number of the water draining grooves is more than two, and the water draining grooves are evenly arranged along the circumferential direction of the flanges.
6. The brushless motor for an unmanned aerial vehicle according to claim 1, wherein:
the brushless motor for the unmanned aerial vehicle further comprises a bushing, and the bushing connects the upper end cover with the rotating shaft.
7. The brushless motor for an unmanned aerial vehicle according to claim 1, wherein:
brushless motor for unmanned aerial vehicle still includes the lower extreme cover, the lower extreme cover sets up support piece's bottom.
8. The brushless motor for the unmanned aerial vehicle according to claim 7, wherein:
the wire harness assembly is arranged on the lower end cover, a circuit substrate is arranged in the lower end cover, a wire is arranged in the wire harness assembly, and the wire is electrically connected with the circuit substrate.
9. The brushless motor for the unmanned aerial vehicle according to claim 8, wherein:
the bottom of the lower end cover is provided with a positioning block, the positioning block is provided with a water leakage hole, and the water leakage hole is communicated with the bottom of the lower end cover.
10. The brushless motor for an unmanned aerial vehicle according to claim 1, wherein:
the brushless motor for the unmanned aerial vehicle still includes the sealing member, the sealing member sets up the rotation axis with between the bearing inner race, the sealing member is used for right the bearing seals.
11. The brushless motor for an unmanned aerial vehicle according to claim 10, wherein:
the number of the sealing elements is two, wherein one sealing element is arranged at the top of the bearing outer ring, and the other sealing element is arranged at the bottom of the bearing outer ring.
12. The brushless motor for an unmanned aerial vehicle according to claim 11, wherein:
the sealing member includes skeleton, lip and packing ring portion, the skeleton butt is in on the rotation axis, the one end of lip with the skeleton is connected, the other end of lip with packing ring portion is connected, packing ring portion card is gone into in the draw-in groove on the bearing inner race.
13. The brushless motor for an unmanned aerial vehicle according to claim 12, wherein:
the skeleton with the cooperation between the rotation axis is interference fit or transition fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120802277.1U CN214707383U (en) | 2021-04-19 | 2021-04-19 | Brushless motor for unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120802277.1U CN214707383U (en) | 2021-04-19 | 2021-04-19 | Brushless motor for unmanned aerial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214707383U true CN214707383U (en) | 2021-11-12 |
Family
ID=78532231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120802277.1U Active CN214707383U (en) | 2021-04-19 | 2021-04-19 | Brushless motor for unmanned aerial vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214707383U (en) |
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2021
- 2021-04-19 CN CN202120802277.1U patent/CN214707383U/en active Active
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