WO2019027195A1 - Drone motor - Google Patents
Drone motor Download PDFInfo
- Publication number
- WO2019027195A1 WO2019027195A1 PCT/KR2018/008589 KR2018008589W WO2019027195A1 WO 2019027195 A1 WO2019027195 A1 WO 2019027195A1 KR 2018008589 W KR2018008589 W KR 2018008589W WO 2019027195 A1 WO2019027195 A1 WO 2019027195A1
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- WO
- WIPO (PCT)
- Prior art keywords
- disposed
- stator
- shaft
- wall
- protrusion
- Prior art date
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- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000003993 interaction Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U30/00—Means for producing lift; Empennages; Arrangements thereof
- B64U30/20—Rotors; Rotor supports
- B64U30/29—Constructional aspects of rotors or rotor supports; Arrangements thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/12—Rotor drives
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
- B64U10/13—Flying platforms
- B64U10/14—Flying platforms with four distinct rotor axes, e.g. quadcopters
Definitions
- An embodiment relates to a motor for a drone.
- the drones are unmanned aerial vehicles flying with a plurality of propellers mounted on the drones.
- the drone body of the drone is provided with a motor for driving the propeller.
- the motor rotates the rotor by electrical interaction between the stator and the rotor to drive the propeller.
- a rotor may be disposed outside the stator to increase the output of the motor.
- the motor having such a configuration has a large heat generation generated therein. Therefore, a heat dissipation structure for communicating the inside and the outside of the motor should be realized. However, there is a problem in that the heat dissipating structure increases the assembly fixing due to the addition of parts, and the weight increases.
- the propeller may be provided in four, six, eight, and so on.
- the propeller is coupled to the rotor of the motor.
- thrust is generated in the axial direction of the motor.
- the shaft rotates in conjunction with the rotation of the rotor of the motor. Since the thrust is generated continuously, the reliability of the coupling force between the rotor, the shaft, the propeller and the rotor is required.
- the shaft of the motor and the rotor can be coupled in an indentation manner.
- the rotor and the shaft of the motor may be combined using a fastening member (e.g., a screw) fastened in the radial direction.
- a fastening member e.g., a screw
- the fastening member is used, there arises a problem that the shape of the rotor and the shaft becomes complicated, a problem that the production cost is increased to realize the same, and a problem that an additional process is required to balance the weight due to the asymmetric structure.
- an embodiment of the present invention is directed to solving the above-mentioned problem, and it is an object of the present invention to provide a motor for a drone that can simplify a heat dissipation structure.
- the embodiment provides a motor for a drone capable of improving a coupling force between a rotor and a shaft using a fixing member.
- a motor for a drone which can simplify the shape of the fixing member and improve productivity by improving the coupling force by using a groove in the shaft formed so that one side of the fixing member is disposed
- the side surface portion includes a plurality of first protrusions protruding from a lower surface of the side surface portion and the side surface portion includes a plurality of second protrusions protruding from an inner circumferential surface of the side surface portion, ,
- the first protrusion is disposed between the plurality of magnets, and the second protrusion is disposed between the plurality of magnets It is possible to provide a drone motor disposed on the upper side.
- the first projecting portion and the second projecting portion may be disposed in alignment with each other with respect to the circumferential direction of the cover portion.
- the width of the second projection portion decreases toward the center of the cover portion.
- the side surface portion includes a plurality of third protrusions protruding from the inner circumferential surface of the side surface portion and the side surface portion protrudes from the inner circumferential surface of the side surface portion and is disposed between the third protrusions
- the side surface portion includes a fourth protrusion portion protruding from the lower surface of the third protrusion portion
- the fifth projection is disposed between the plurality of magnets, said third projection and said fourth projection may provide a drone motors respectively disposed above the plurality of magnets.
- the fourth protrusion may protrude further than the lower end of the side portion.
- the body portion includes a first wall projecting downwardly, and the housing includes a second wall protruding upward, wherein an inner peripheral surface of the first wall and an outer peripheral surface of the second wall face each other, The lower surface of the first wall may be disposed below the upper surface of the second wall.
- the thickness of the first wall and the thickness of the second wall may be different.
- the thickness of the first and second walls disposed relatively outward may be thicker.
- the first gap is a vertical gap between the first wall and the housing
- the second gap is a vertical gap between the second wall and the body.
- the first gap which is the vertical separation distance between the first wall and the housing
- the third gap which is the horizontal separation distance between the first wall and the second wall
- the second gap is a vertical gap distance between the second wall and the body portion
- the third gap is a horizontal gap distance between the first wall and the second wall.
- the first wall includes a plurality of second walls spaced apart along the thickness direction of the housing, and the first wall may be disposed between the adjacent second walls.
- the lower surface of the body portion may include an inclined surface.
- the upper surface of the base portion may include an inclined surface.
- a stator comprising: a shaft; a stator through which the shaft passes; A rotor disposed outside the stator; A housing disposed below the stator; And a fixing member disposed on an outer circumferential surface of the shaft, wherein the rotor includes a cover portion coupled to the shaft and disposed on the upper side of the stator; A body coupled to the cover and disposed outside the stator; And a plurality of magnets disposed on an inner peripheral surface of the body portion, wherein the fixing member is achieved by a motor for drones disposed on the top of the cover portion.
- the cover portion may further include a first groove formed on an upper surface thereof, and the fixing member may be disposed in the first groove.
- the shaft may further include a second groove formed in a circumferential direction on an outer circumferential surface thereof, and one side of the fixing member may be disposed in the second groove.
- the fixing member may include a ring-shaped frame; And a plurality of protruding pieces protruding from the inner circumferential surface of the frame, and the end of the protruding piece may be disposed in the second groove.
- the projecting piece can be bent in the axial direction.
- the fixing member may be provided as a snap ring.
- the fixing member may be disposed radially projecting from the outer circumferential surface of the shaft, and may be integrally formed with the shaft.
- the shaft may further include a third groove circumferentially formed on an outer circumferential surface thereof, and a stationary ring may be disposed in the third groove.
- Landing means coupled to the lower portion of the drone body; A plurality of propeller supports extending radially from the drones; A motor coupled to the propeller support; And a propeller coupled to the motor, wherein the motor comprises: a shaft; A stator through which the shaft passes; A rotor disposed outside the stator; A housing disposed below the stator; And a fixing member disposed on an outer circumferential surface of the shaft, wherein the rotor includes a cover portion coupled to the shaft to cover an upper portion of the stator; A body portion disposed outside the stator; And a plurality of magnets disposed on an inner circumferential surface of the body portion, wherein the fixing member is achieved by a dron disposed between the propeller and the cover portion.
- the cover may further include a first groove formed on an upper surface thereof, and the fixing member may be disposed in the first groove.
- the shaft further includes a second groove circumferentially formed on an outer circumferential surface thereof,
- the fixing member includes a ring-shaped frame; And a plurality of projecting pieces projecting from the inner peripheral surface of the frame, and the end portions of the projecting pieces may be disposed in the second groove.
- the projecting piece can be bent in the axial direction.
- the fixing member may be disposed to protrude radially from the outer circumferential surface of the shaft, and may be integrally formed with the shaft.
- the cover part structure of the rotor is utilized to provide an advantageous effect that the heat dissipation structure can be simplified.
- a wall is formed between the housing and the cover portion of the rotor to provide an advantageous effect that water or foreign matter can be prevented from intruding into the motor.
- productivity can be improved while simplifying the shape of the fixing member and improving the coupling force by using grooves in the shaft formed so that one side of the fixing member is disposed. That is, the fixing member can maintain the coupling force between the propeller and the rotor even at a high temperature without using a fastening member such as a separate screw.
- the reliability of the dron motor can be improved.
- the rotor can be fixed to the shaft simply by using the fixing member, the assembling is simple and the productivity can be improved.
- 1 is a view showing a drone
- FIG. 2 is a view showing a motor and a propeller for a drone according to the first embodiment
- FIG. 3 is a view showing a motor for a drone according to the first embodiment
- FIG. 4 is an exploded view of the dron motor shown in Fig. 3,
- FIG. 5 is a cross-sectional view of the dron motor based on A-A in Fig. 3,
- FIG. 6 is a view showing a cover portion and a body portion of the rotor
- FIG. 9 is a perspective view showing a bottom surface of the cover portion
- Fig. 10 is a bottom view of the cover portion shown in Fig. 9,
- Fig. 12 is a bottom view of the cover portion shown in Fig. 11,
- Fig. 13 is an enlarged view of Fig. 5, showing the first wall and the second wall, Fig.
- 15 is a view showing a distance between the lower surface of the body portion and the upper surface of the housing
- 16 is a view showing a modification of the first wall and the second wall
- 17 is a perspective view showing a motor for a drone according to the second embodiment
- Fig. 20 is a front view of the shaft of Fig. 21,
- Fig. 21 is a view showing a cover portion and a body portion of the rotor of Fig. 20,
- Fig. 22 is a bottom view of the rotor of Fig. 20,
- FIG. 23 is a view showing one embodiment of a fixing member
- Fig. 24 is an enlarged view showing area A in Fig. 21,
- 25 is a view showing a snap ring arranged in a fixing member of a motor for a drone according to the second embodiment
- 26 is an enlarged view showing a region B in Fig. 21,
- FIG. 27 is a perspective view showing a motor for a drone according to the third embodiment
- FIG. 30 is a side view showing the shaft of the motor for drones according to the third embodiment.
- the singular form may include plural forms unless otherwise specified in the text, and may be a combination of A, B, and C when described as " A and / or at least one (or more than one) Or < / RTI > all possible combinations.
- first, second, A, B, (a), and (b) may be used.
- the expression “upward” or “downward” may include not only an upward direction but also a downward direction on the basis of one component.
- FIG. 1 is a view showing a drone
- FIG. 2 is a view showing a motor and a propeller for a drone according to the first embodiment.
- the drone may include a motor 10, a drone main body 20, a propeller 30, and a control unit 40.
- the drone main body 20 may include a main body 21, landing means 22, and a propeller support portion 23.
- the drone body 20 forms the outer shape of the drone.
- the drone body 20 includes a plurality of propeller support portions 23.
- a plurality of propeller supports (23) are disposed radially in the body (21).
- the motor 10 can be mounted on each propeller support 23.
- Each motor 10 is equipped with a propeller 30.
- a wireless type control unit 40 for controlling the driving of the motor 10.
- Fig. 3 is an exploded view of the motor for a drone shown in Fig. 3
- Fig. 5 is a sectional view of a motor for a drone with reference to AA in Fig. 3 .
- the motor 10 may include a shaft 100, a stator 200, a rotor 300, and a housing 400.
- the shaft 100 is disposed so as to pass through the center of the stator 200.
- the shaft 100 may be rotatably coupled to the stator core 201.
- the shaft 100 is connected to the propeller 30 and the cover portion 310 to transmit the driving force of the motor 10 to the propeller 30.
- the stator 200 induces electrical interaction with the rotor 300 to induce rotation of the rotor 300.
- the stator 200 may include a stator core 210 and a coil 220.
- the stator core 210 may be formed by laminating a plurality of plates in the form of a thin steel plate. Or the stator core 210 may be configured as a single unit formed by a cylinder. Further, the stator core 210 may be formed by connecting or connecting a plurality of divided cores. Each of the divided cores may be constituted of a single plate formed by stacking a plurality of plates in the form of thin steel plates or formed into a barrel.
- the rotor 300 is disposed outside the stator 200.
- the rotor 300 may include a cover portion 310, a body portion 320, and a magnet 330.
- the cover portion 310 covers the upper portion of the stator 200.
- the body portion 320 covers the side portion of the stator 200.
- the cover portion 310 and the body portion 320 may be formed to surround the stator 200 as a whole. This is a structure for preventing water or foreign matter from flowing into the motor 10.
- the cover portion 310 may include a top surface portion 311 and a side surface portion 312.
- a hole through which the shaft 100 passes is disposed in the center of the upper surface portion 311.
- the propeller coupling portion 313 may be disposed at the center of the upper surface portion 311.
- the blade 314 is disposed radially around the propeller coupling portion 313.
- a first through hole 315 is arranged around the blade 314. The first through hole 315 penetrates the upper surface portion 311 and serves to communicate the inside and the outside of the dron motor 10. The blade 314 induces a flow of air through the first through hole 315 so that the air inside the motor 10 can be discharged to the outside or the outside air can flow into the inside of the motor 10.
- the body portion 320 surrounds the side portion of the stator 100.
- the body portion 320 is formed in a tubular shape having an empty interior.
- the inner circumferential surface of the body portion 320 is disposed so as to face the tooth of the stator core 201.
- the magnet 330 may be attached to the inner circumferential surface of the body 320.
- the body portion 320 corresponds to a yoke forming a magnetic path of the magnet 330.
- the upper end of the body portion 320 may be coupled to the cover portion 310.
- the body part 320 and the cover part 310 may be integrally formed as a separate product by double injection molding or may be manufactured as a single product.
- the magnet 330 is coupled to the inner circumferential surface of the body portion 320.
- the magnet 330 induces an electrical interaction with the coil wound around the stator core 201.
- the stator 100 is located in the inner space formed by the cover 310, the body 320, and the housing 400 described above.
- the housing 400 may include a pillar 410 and a bottom 420.
- the columnar portion 410 forms a center hole on the inner side.
- the stator core 210 may be coupled to the outside of the columnar portion 410.
- a bearing 510 may be mounted inside the column portion 410.
- the shaft (100) can be fitted to the bearing (510).
- the holder 520 may be inserted between the bearing 510 and the shaft 100.
- the holder 520 located at the upper side can be connected to the cover part 310.
- the bottom portion 420 extends in the radial direction at the lower end of the column portion 410 to cover the lower portion of the stator 200.
- the bottom portion 420 may include a lower portion 421, a side wall portion 422, and a connection portion 423.
- the lower portion 421, the side wall portion 422, and the connection portion 423 are one means vertically connected to each other, which can be described according to their shape and functional characteristics.
- the lower portion 421 extends from the lower end of the post 410.
- the side wall portion 422 is disposed apart from the lower portion 421.
- the connection portion 423 connects the lower portion 421 and the side wall portion 422. At this time, the connection portion 423 may be formed to be inclined.
- the connection portion 423 may include a second through hole 423a.
- a plurality of second through holes 423a may be provided.
- the second through holes 423a of the respective housings 400 may be aligned with the first through holes 315 of the cover portion 310 along the circumferential direction.
- FIG. 6 is a view showing a cover portion and a body portion of the rotor
- FIG. 7 is a bottom view of the rotor
- FIG. 8 is a sectional view of the rotor.
- the cover portion 310 includes a top surface portion 311 and a side surface portion 312.
- the side surface portion 312 is engaged with the upper surface of the body portion 320.
- the side surface portion 312 may include a first protrusion portion 600 and a second protrusion portion 700. And serves to guide the first protrusion (600) to the magnet (330). And the second protrusion 700 serves as another blade.
- the first protrusions 600 protrude from the lower surface 312b of the side surface portion 312.
- a plurality of first protrusions 600 are disposed.
- the first protrusions 600 may be disposed at regular intervals along the circumferential direction of the side portion 312.
- the first protrusion 600 may be disposed in a gap (G in FIG. 6) between the magnet 330 and the magnet 330.
- the outer circumferential surface of the first protrusion 600 is in contact with the inner circumferential surface of the body 320.
- the first protrusions 600 serve to guide the attachment position of the magnet 330.
- the second protrusion 700 protrudes from the inner circumferential surface 312a of the side surface portion 312.
- a plurality of second protrusions 700 are disposed.
- the second protrusions 700 may be disposed at regular intervals along the circumferential direction of the side portion 312.
- the second protrusions 700 may be disposed in alignment with the first protrusions 600 with respect to the circumferential direction of the side portions 312.
- the second protrusion 700 is disposed on the upper side of the magnet 330.
- the upper end of the second protrusion 700 may be connected to the lower surface of the upper surface portion 311 of the cover portion 310.
- Fig. 9 is a perspective view showing the bottom of the cover part
- Fig. 10 is a bottom view of the cover part shown in Fig.
- the second protrusion 700 serves as another blade.
- the second protrusion 700 has a step difference from the inner circumferential surface 312a of the side surface portion 312. Accordingly, when the rotor 300 rotates, the flow of air is controlled such that the air inside the motor 10 is discharged to the outside through the first through hole 315 or the outside air flows into the inside of the motor 10 .
- the shape of the second protrusion 700 may be such that the shape of the second protrusion 700 is the same as that of the second protrusion 700 as the center C of the cover 310
- the width W1 may be reduced.
- the thickness t1 of the second protrusion 700 may be set such that at least a part of the second protrusion 700 overlaps the first through hole 315 when the bottom surface of the cover 310 is viewed from the front side have.
- the thickness t1 of the second protrusion 700 is a numerical value showing the degree of protrusion from the inner circumferential surface 312a of the side surface portion 312.
- FIG. 11 is a view showing a modification of the cover portion.
- the side portion 312 of the cover 310 may include a third protrusion 800, a fourth protrusion 900, and a fifth protrusion 1000.
- the fourth protrusion 900 also serves as a blade.
- the third protrusion 800 protrudes from the inner circumferential surface 312a of the side surface portion 312.
- a plurality of third protrusions 800 are disposed.
- the third protrusions 800 may be disposed at regular intervals along the circumferential direction of the side portion 312.
- the upper end of the third protrusion 800 may be connected to the lower surface of the upper surface portion 311 of the cover portion 310.
- the third projection 800 serves as another blade.
- the third protrusion 800 forms a step with the inner circumferential surface 312a of the side surface portion 312. Accordingly, when the rotor 300 rotates, the flow of air is controlled such that the air inside the motor 10 is discharged to the outside through the first through hole 315 or the outside air flows into the inside of the motor 10 .
- FIG. 12 is a bottom view of the cover portion shown in Fig.
- the fourth protrusion 900 protrudes from the inner circumferential surface 312a of the side surface portion 312. As shown in FIG. The fourth protrusion 900 may be disposed between the third protrusion 800 and the third protrusion 800 adjacent to each other. The fourth protrusion 900 may be disposed at an intermediate point between the third protrusion 800 and the third protrusion 800 adjacent to each other with respect to the circumferential direction of the cover 310. [ The fourth protrusion 900 is also provided. The fourth protrusion 900 forms a step with the inner circumferential surface 312a of the side surface portion 312. Accordingly, when the rotor 300 rotates, the rotation of the motor 10 Through the first through hole (315) or the outside air can be introduced into the motor (10).
- the shape of the third projection 800 may be such that the shape of the third projection 800 is the same as that of the third projection 800 as the center C of the cover 310
- the width W2 may decrease.
- the thickness t2 of the third protrusion 800 can be set such that at least a portion of the third protrusion 800 overlaps the first through hole 315 when the bottom surface of the cover portion 310 is viewed from the front side have.
- the thickness t2 of the third protrusion 800 is a numerical value showing the degree of protrusion from the inner circumferential surface 312a of the side surface portion 312.
- the thickness t3 of the fourth protrusion 900 may be smaller than the thickness t2 of the third protrusion 800.
- the fourth protrusion 900 may protrude further downward than the lower surface 312b of the side surface portion 312.
- the fifth protrusion 1000 protrudes from the lower surface of the third protrusion 800.
- the fifth protrusion 1000 may be disposed between the magnet 330 and the magnet 330 when the cover 310 and the body 320 are engaged. At this time, the outer circumferential surface of the fifth protrusion 1000 is in contact with the inner circumferential surface of the body 320.
- the fifth protrusion (600) serves to guide the attachment position of the magnet (330). The upper surface of the magnets 300 guided along the fifth protrusions 600 is in contact with the fourth protrusions 900.
- Fig. 13 is an enlarged view of Fig. 5B showing the first wall and the second wall.
- the body portion 320 of the rotor 300 and the housing 400 are disposed apart from each other. This is because the body portion 320 rotates and the housing 400 is fixed. Therefore, there is a gap between the lower surface of the body portion 320 and the upper surface of the side wall portion 422 of the housing 400. Foreign matter may flow into the motor 10 through the gap. To prevent this.
- a first wall 321 and a second wall 430 are disposed.
- the first wall 321 is disposed on the lower surface of the body portion 320.
- the second wall 430 is disposed on the upper surface of the side wall portion 422. At least a part of the inner circumferential surface 321a of the first wall 321 and at least a part of the outer circumferential surface 431 of the second wall 430 are arranged to face each other.
- the first wall 321 and the second wall 430 form a bend in the gap between the lower surface of the body 320 and the upper surface of the side wall portion 422 so that the air flows into the motor 10
- the foreign matter serves to prevent the foreign matter from flowing into the inside of the motor 10.
- the upper surface of the sidewall portion 422 may include an inclined surface 422a along with the second wall 430. As shown in Fig. This inclined surface 422a induces a change in the cross-sectional area of the flow path through which the air flows so that the flow of air is smoothly maintained, but the foreign matter is prevented from flowing. 13, the inclined surface 422a is disposed on the upper surface of the side wall portion 422. However, the present invention is not limited thereto, and the inclined surface may be disposed on the lower surface of the body portion 320. [
- FIG. 14 is a view showing the thickness of the first wall and the thickness of the second wall.
- the thickness t4 of the first wall 321 and the thickness t5 of the second wall 430 may be different. And the thickness t4 of the first wall 321 disposed on the relatively outer side may be thicker than the thickness t5 of the second wall 430. [ The structural stiffness of the first wall 321 is secured by increasing the thickness t4 of the first wall 321 that receives an external force.
- 15 is a view showing the distance between the lower surface of the body portion and the upper surface of the housing.
- the first gap L1 and the second gap L2 may be different. Or the first gap L1 and the third gap L3 may be different from each other. Or the second gap L2 and the third gap L3 may be different. Or the first gap L1, the second gap L2 and the third gap L3 may be different from each other.
- the first gap L1 may be larger than the third gap L3, and the third gap L3 may be larger than the second gap L2. That is, the first wall 321 and the second wall 430 may be disposed such that the distance between the lower surface of the body and the upper surface of the housing decreases toward the inner side. This is to prevent foreign matter from flowing into the motor 10 as much as possible while inducing air flow.
- the first gap L1 is a vertical separation distance between the first wall 321 and the upper surface of the side wall portion 422, and the second gap L2 is a vertical distance between the second wall 430 and the body portion 320 And the third gap L3 is a horizontal separation distance between the first gap L1 and the second gap L2.
- 16 is a view showing a modification of the first wall and the second wall.
- a plurality of second walls 430 may be disposed at intervals along the thickness direction of the side wall portions 422. At this time, the first wall 321 may be disposed between the second wall 430 and the second wall 430. Although a plurality of second walls 430 are shown in the drawing, The present invention is not limited thereto and a plurality of first walls 321 may be disposed and a second wall 430 may be disposed between the first wall 321 and the first wall 321.
- FIG. 17 is a perspective view showing a motor for drone according to the second embodiment
- FIG. 18 is an exploded perspective view of the motor for drone according to the second embodiment
- FIG. 19 is a sectional view of the motor for drone according to the second embodiment.
- FIG. 19 is a cross-sectional view of the dron motor based on A-A in FIG.
- the motor 20 includes a shaft 1000, a stator 2000, a rotor 3000, a housing 4000, a fixing member 5000, a stationary ring 6000, and a bearing 7000.
- the fixing member 5000 and the fixing ring 6000 may be spaced apart from the upper portion and the lower portion of the shaft 1000, respectively.
- a stator 2000, a rotor 3000, a housing 4000, and a bearing 7000 may be disposed between the stationary member 5000 and the stationary ring 6000 with respect to the axial direction.
- the shaft 1000 is disposed so as to pass through the center of the stator 2000.
- the shaft 1000 may be rotatably coupled to the stator core 2100.
- the shaft 1000 is connected to the propeller 30 and the cover portion 3100 so as to transmit the driving force of the motor 10 to the propeller 30.
- FIG. 20 is a front view of the shaft of Fig.
- the shaft 1000 may include a cylindrical shaft body 1100 and a second groove 1200 and a third groove 1300 formed on the outer circumferential surface of the shaft body 1100.
- a bearing 7000 may be disposed on the outer circumferential surface of the shaft 1000 for rotating the shaft 1000.
- Each of the second grooves 1200 and the third grooves 1300 may be formed in the circumferential direction on the outer circumferential surface of the shaft body 1100.
- the axial direction indicates the direction (y direction) of the axis C of the shaft 1000
- the radial direction (x direction) means the direction perpendicular to the axial direction.
- the stator 2000 induces electrical interaction with the rotor 3000 to induce rotation of the rotor 3000.
- the stator 2000 may include a stator core 2100 and a coil 2200.
- the stator 2000 may further include an insulator (not shown) disposed between the stator core 2100 and the coil 2200. The insulator insulates the stator core 2100 and the coil 2200.
- the stator core 2100 may be formed by laminating a plurality of plates in the form of a thin steel plate. Or the stator core 2100 may be formed as a single unit formed of a cylinder. In addition, the stator core 2100 may be formed by connecting or connecting a plurality of divided cores. Each of the divided cores may be constituted of a single plate formed by stacking a plurality of plates in the form of thin steel plates or formed into a barrel.
- the rotor 3000 is disposed outside the stator 2000 with respect to the radial direction.
- the rotor 3000 may include a cover portion 3100, a body portion 3200, and a magnet 3300.
- the cover portion 3100 covers the upper portion of the stator 2000.
- the body portion 3200 covers the side portion of the stator 2000.
- the cover portion 3100 and the body portion 3200 may be formed to surround the stator 2000 as a whole. This is a structure for preventing water or foreign matter from flowing into the motor 20.
- the cover portion 3100 may include a top surface portion 3110, a side surface portion 3120, and a first groove 3130.
- a hole through which the shaft 1000 penetrates is disposed at the center of the upper surface portion 3110.
- the first groove 3130 may be recessed in the upper surface 3110a of the upper surface portion 3110 so that the hole is centered. Accordingly, the seating surface 3140 can be formed in the first groove 3130.
- Fig. 21 is a view showing a cover portion and a body portion of the rotor of Fig. 18, and Fig. 22 is a bottom view of the rotor of Fig.
- a first hole 3150 may be further formed in the upper surface portion 3110.
- the first hole 3150 penetrates the upper surface portion 3110 and serves to communicate the inside and the outside of the dron motor 20.
- the cover portion 3100 may further include a first protrusion 3160 and a second protrusion 3170.
- the first protrusion 3160 may be formed to protrude downward from the side surface portion 3120.
- the second protrusion 3170 may protrude radially from the inner circumferential surface of the side portion 3120.
- the second protrusion 3170 serves as a blade.
- the first protrusion 3160 is formed to protrude from the lower surface of the side portion 3120.
- a plurality of first protrusions 3160 are disposed.
- the first protrusions 3160 may be disposed at regular intervals along the circumferential direction of the side portion 3120.
- the first protrusion 3160 can be disposed in a gap (G in FIG. 7) between the magnet 3300 and the magnet 3300.
- the outer circumferential surface of the first protrusion 3160 is in contact with the inner circumferential surface of the body portion 3200.
- the first protrusion 3160 serves to guide the attachment position of the magnet 3300.
- the second protrusion 3170 protrudes from the inner peripheral surface of the side surface portion 3120.
- a plurality of second protrusions 3170 are disposed.
- the second protrusions 3170 may be disposed at regular intervals along the circumferential direction of the side surface portion 3120.
- the second protrusion 3170 may be disposed in alignment with the first protrusion 3160 with respect to the circumferential direction of the side portion 3120.
- the second projection part 3170 is disposed on the upper side of the magnet 3300.
- the upper end of the second protrusion 3170 may be connected to the lower surface of the upper surface portion 3110 of the cover portion 3100.
- the body portion 3200 surrounds the side of the stator 2000.
- the body portion 3200 is formed into a tubular shape with an empty interior.
- the inner circumferential surface of the body portion 3200 may be disposed so as to face the teeth of the stator core 2100.
- a magnet 3300 may be attached to the inner circumferential surface of the body 3200.
- the body portion 3200 corresponds to a yoke forming a magnetic path of the magnet 3300.
- the upper end of the body portion 3200 may be coupled to the cover portion 3100.
- the body portion 3200 and the cover portion 3100 may be integrally formed as a separate product by double injection molding or may be manufactured as a single product.
- the magnet 3300 is coupled to the inner peripheral surface of the body portion 3200.
- the magnet 3300 causes electrical interaction with the coil wound on the stator core 2100.
- the stator 2000 is located in the inner space defined by the cover portion 3100, the body portion 3200, and the housing 4000 described above.
- the housing 4000 may include a pillar portion 4100 and a bottom portion 4200.
- the columnar portion 4100 forms a center hole on the inner side.
- the stator core 2100 may be coupled to the outside of the column portion 4100.
- a bearing 7000 can be mounted inside the column portion 4100.
- the shaft 1000 can be fitted to the bearing 7000.
- the bearing 7000 arranged at the upper part can be supported by the cover part 3100.
- the bottom portion 4200 extends in the radial direction at the lower end of the column portion 4100 to cover the lower portion of the stator 2000.
- the bottom portion 4200 may include a lower portion 4210, a side wall portion 4220, and a connection portion 4230.
- the lower portion 4210, the side wall portion 4220, and the connection portion 4230 can be separately described according to their shape and functional characteristics, and are one means vertically connected to each other.
- the lower portion 4210 extends radially at the lower end of the post 4100.
- the sidewall portion 4220 is disposed apart from the lower portion 4210.
- the connection portion 4230 connects the lower portion 4210 and the side wall portion 4220. At this time, the connection portion 4230 may be formed to be inclined.
- the connection portion 4230 may include a second hole 4230a.
- a plurality of second holes 4230a may be provided.
- the second holes 4230a of the respective housings 4000 may be aligned with the first holes 3150 of the cover portion 3100 along the circumferential direction.
- the fixing member 5000 can prevent the rotor 3000 from flowing in response to the thrust.
- the fixing member 5000 may be disposed between the propeller 30 and the cover portion 3100.
- the fixing member 5000 may be disposed in the first groove 3130 of the cover portion 3100.
- the fixing member 5000 can be supported on the seating surface 3140. At this time, the inside of the fixing member 5000 may be disposed in the second groove 1200 of the shaft 1000.
- the fixing member 5000 since the fixing member 5000 is fixed to the shaft 1000, even if the thrust is generated, the fixing member 5000 prevents the rotor 3000 from moving upward in the axial direction (y direction) do.
- Fig. 23 is a view showing one embodiment of the fixing member
- Fig. 24 is an enlarged view showing area A in Fig.
- the fixing member 5000 may include a ring-shaped frame 5100 having a predetermined area and a plurality of protruding pieces 5200. Further, the fixing member 5000 may further include a side wall 5300 protruding axially from the outer circumferential surface of the frame 5100.
- the frame 5100 may be disposed on the seating surface 3140 to support the cover portion 3100.
- the protruded piece 5200 protrudes from the inner peripheral surface of the frame 5100.
- the plurality of protruding pieces 5200 may be spaced apart from each other along the circumferential direction.
- the inner circumferential surface of the fixing member 5000 formed by the end of the projecting piece 5200 may be formed with a predetermined radius R2.
- the radius Rl of the shaft 1000 is defined with respect to the center C as shown in FIG.
- the radius R1 of the shaft 1000 is larger than the radius R2 formed by the inner circumferential surface of the fixing member 5000.
- the protruding member 5200 of the fixing member 5000 is inserted into the shaft 1000, In the axial direction.
- the projecting pieces 5200 with respect to the frame 5100 may be arranged to have a predetermined inclination angle [theta].
- the fixing member 5000 having the bent protruding pieces 5200 can more effectively cope with the external force acting in the thrust or the axial direction.
- the fixing member 5000 Since the fixing member 5000 is disposed in the first groove 3130 and is coupled to the second groove 1200, the fixing member 5000 is disposed at a distance from the axis C of the shaft 1000. Accordingly, unlike the screw used in the related art, the fixing member 5000 positions the center of gravity of the fixing member 5000 close to the shaft 1000, thus eliminating the balancing process which has conventionally been separately performed.
- 25 is a view showing a snap ring disposed in a fixing member of a motor for a drone according to the second embodiment.
- a retaining member 5000 may be provided with a snap ring.
- the snap ring is also disposed in the first groove 3130 of the cover portion 3100 in a state in which the snap ring is disposed in the second groove 1200 of the shaft 1000.
- the snap ring can prevent the rotor 3000 from flowing upward in response to the thrust.
- 26 is an enlarged view showing a region B in Fig.
- the retaining ring 6000 may be disposed in the third groove 1300 of the shaft 1000 to support the lower surface of the bearing 7000.
- the bearing 7000 is a lower bearing 7200 disposed at the lower portion of the shaft 1000. Accordingly, the stationary ring 6000 can prevent the rotor 3000 from flowing downward corresponding to the thrust.
- a plurality of bearings 7000 disposed on the inner side of the columnar portion 4100 of the housing 4000 are disposed with one region 4110 of the columnar portion 4100 interposed therebetween and the upper bearing 7100 support the rotor 3000, the retaining ring 6000 can prevent the rotor 3000 from flowing downward corresponding to the thrust.
- a washer 6100 may further be disposed between the lower bearing 7200 of the shaft 1000 and the stationary ring 6000.
- Fig. 28 is a disassembled perspective view of the motor for a drone according to the third embodiment
- Fig. 29 is a sectional view of the motor for a drone according to the third embodiment
- Fig. 30 is a side view showing the shaft of the motor for drones according to the third embodiment. 29 is a cross-sectional view showing the line B-B in Fig.
- the dron motor 40 according to the third embodiment differs from the motor 30 according to the third embodiment in shape There is a difference. For example, there is a difference in that a flange is formed on the shaft 1000a to replace the fixing member 5000 of the motor for a drone 40 according to the second embodiment.
- the motor for drone 40 includes a shaft 1000a, a stator 2000, a rotor 3000, a housing 4000, a stationary ring 6000, and a bearing 7000 .
- the shaft 1000a may include a cylindrical shaft body 1100 and a third groove 1300 formed on the outer circumferential surface of the shaft body 1100 and a flange 1400. 29, the stationary ring 6000 may be disposed in the third groove 1300.
- the flange 1400 protrudes radially from the outer circumferential surface of the shaft main body 1100. At this time, the flange 1400 may be formed integrally with the shaft body 1100.
- the flange 1400 may be formed in a ring shape.
- the flange 1400 may be formed with a radius R3.
- the radius R3 of the flange 1400 is larger than the radius R1 of the shaft body 1100.
- the flange 1400 of the shaft 1000a can be substituted for the fixing member 5000 of the motor 10 for drones according to the second embodiment.
- the flange 1400 provided as the fixing member is disposed to protrude in the radial direction from the outer circumferential surface of the shaft 1000a, thereby preventing the rotor 3000 from flowing in response to the thrust.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims (10)
- 샤프트;shaft;상기 샤프트가 관통하는 홀을 포함하는 스테이터;A stator including a hole through which the shaft passes;상기 스테이터 외측에 배치되는 로터; 및 A rotor disposed outside the stator; And상기 스테이터 하측에 배치되는 하우징;을 포함하고,And a housing disposed below the stator,상기 로터는The rotor상기 샤프트와 결합하며 상기 스테이터의 상측에 배치되는 커버부; A cover coupled to the shaft and disposed on the upper side of the stator;상기 커버부와 결합하며 상기 스테이터의 외측에 배치되는 몸체부; 및A body coupled to the cover and disposed outside the stator; And상기 몸체부의 내주면에 배치되는 복수의 마그넷을 포함하고,And a plurality of magnets disposed on an inner peripheral surface of the body portion,상기 커버부는 The cover상면부와 상기 상면부에서 하측으로 연장된 측면부를 포함하고,And an upper surface portion and a side surface portion extending downward from the upper surface portion,상기 측면부는 상기 측면부의 하면에서 돌출된 복수의 제 1 돌기부를 포함하고,Wherein the side portion includes a plurality of first protrusions protruding from a lower surface of the side portion,상기 측면부는 상기 측면부의 내주면에서 돌출된 복수의 제 2 돌기부를 포함하고,Wherein the side portion includes a plurality of second protrusions protruding from an inner circumferential surface of the side portion,상기 제 1 돌기부는 상기 복수의 마그넷 사이에 배치되고,Wherein the first protrusion is disposed between the plurality of magnets,상기 제 2 돌기부는 상기 복수의 마그넷의 상측에 배치되는 드론용 모터.And the second protrusion is disposed on the upper side of the plurality of magnets.
- 제1 항에 있어서,The method according to claim 1,상기 제1 돌기부와 상기 제2 돌기부는 상기 커버부의 원주 방향을 기준으로, 상호 정렬되어 배치되는 드론용 모터.Wherein the first protrusions and the second protrusions are disposed in alignment with each other with respect to a circumferential direction of the cover portion.
- 샤프트;shaft;상기 샤프트가 관통하는 홀을 포함하는 스테이터;A stator including a hole through which the shaft passes;상기 스테이터 외측에 배치되는 로터; 및 A rotor disposed outside the stator; And상기 스테이터 하측에 배치되는 하우징;을 포함하고,And a housing disposed below the stator,상기 로터는The rotor상기 샤프트와 결합하며 상기 스테이터의 상측에 배치되는 커버부; A cover coupled to the shaft and disposed on the upper side of the stator;상기 커버부와 결합하며 상기 스테이터의 외측에 배치되는 몸체부; 및A body coupled to the cover and disposed outside the stator; And상기 몸체부의 내주면에 배치되는 복수의 마그넷을 포함하고,And a plurality of magnets disposed on an inner peripheral surface of the body portion,상기 커버부는 The cover상면부와 상기 상면부에서 하측으로 연장된 측면부를 포함하고,And an upper surface portion and a side surface portion extending downward from the upper surface portion,상기 측면부는 상기 측면부의 내주면에서 돌출된 복수의 제3 돌기부를 포함하고,Wherein the side portion includes a plurality of third protrusions protruding from an inner circumferential surface of the side portion,상기 측면부는 상기 측면부의 내주면에서 돌출되며 상기 제3 돌기부 사이에 배치되는 제 4 돌기부를 포함하고,The side portion includes a fourth protrusion protruding from the inner circumferential surface of the side portion and disposed between the third protrusions,상기 측면부는 상기 제3 돌기부의 하면에서 돌출되는 제5 돌기부를 포함하고,The side portion includes a fifth protrusion protruding from the lower surface of the third protrusion,상기 제5 돌기부는 상기 복수의 마그넷 사이에 배치되고,The fifth protrusion is disposed between the plurality of magnets,상기 제3 돌기부 및 상기 제4 돌기부는 각각 상기 복수의 마그넷의 상측에 배치되는 드론용 모터.And the third protrusion and the fourth protrusion are disposed on the upper side of the plurality of magnets, respectively.
- 제1 항 또는 제3 항에 있어서,The method according to claim 1 or 3,상기 몸체부는 하측으로 돌출되는 제 1 벽을 포함하고,Wherein the body portion includes a first wall projecting downwardly,상기 하우징은 상측으로 돌출되는 제 2 벽을 포함하고,The housing includes a second wall protruding upward,상기 제 1 벽의 내주면과 상기 제 2 벽의 외주면은 서로 마주보며, The inner circumferential surface of the first wall and the outer circumferential surface of the second wall face each other,제 1 벽의 하면은 상기 제 2 벽의 상면보다 하측에 배치되는 드론용 모터.And the lower surface of the first wall is disposed below the upper surface of the second wall.
- 제1 항 또는 제3 항에 있어서,The method according to claim 1 or 3,상기 몸체부는 하측으로 돌출되는 제 1 벽을 포함하고,Wherein the body portion includes a first wall projecting downwardly,상기 하우징은 상측으로 돌출되는 제 2 벽을 포함하고,The housing includes a second wall protruding upward,상기 제 1 벽의 내주면과 상기 제 2 벽의 외주면은 서로 마주보며, The inner circumferential surface of the first wall and the outer circumferential surface of the second wall face each other,제 1 벽의 하면은 상기 제 2 벽의 상면보다 하측에 배치되는 드론용 모터.And the lower surface of the first wall is disposed below the upper surface of the second wall.
- 샤프트;shaft;상기 샤프트가 관통하는 스테이터;A stator through which the shaft passes;상기 스테이터 외측에 배치되는 로터; A rotor disposed outside the stator;상기 스테이터 하측에 배치되는 하우징; 및A housing disposed below the stator; And상기 샤프트의 외주면에 배치되는 고정부재를 포함하고,And a fixing member disposed on an outer peripheral surface of the shaft,상기 로터는The rotor상기 샤프트와 결합하며 상기 스테이터의 상측에 배치되는 커버부;A cover coupled to the shaft and disposed on the upper side of the stator;상기 커버부와 결합하며 상기 스테이터의 외측에 배치되는 몸체부; 및A body coupled to the cover and disposed outside the stator; And상기 몸체부의 내주면에 배치되는 복수의 마그넷을 포함하고,And a plurality of magnets disposed on an inner peripheral surface of the body portion,상기 고정부재는 상기 커버부의 상부에 배치되는 드론용 모터.And the fixing member is disposed on the upper portion of the cover portion.
- 제6 항에 있어서, The method according to claim 6,상기 커버부는 상면에 형성된 제1 홈을 더 포함하며,The cover portion further includes a first groove formed on an upper surface,상기 제1 홈에는 상기 고정부재가 배치되는 드론용 모터.And the fixing member is disposed in the first groove.
- 제7 항에 있어서,8. The method of claim 7,상기 샤프트는 외주면에 원주방향으로 형성된 제2 홈을 더 포함하며,Wherein the shaft further comprises a second groove circumferentially formed on an outer circumferential surface thereof,상기 제2 홈에는 상기 고정부재의 일측이 배치되는 드론용 모터.And one side of the fixing member is disposed in the second groove.
- 제8 항에 있어서,9. The method of claim 8,상기 고정부재는The fixing member링 형상의 프레임; 및A ring-shaped frame; And상기 프레임의 내주면에서 돌출된 복수 개의 돌출편을 포함하며,And a plurality of projecting pieces projecting from an inner peripheral surface of the frame,상기 돌출편의 단부는 상기 제2 홈에 배치되는 드론용 모터.And the end portion of the projecting piece is disposed in the second groove.
- 제9 항에 있어서,10. The method of claim 9,상기 고정부재와 상기 샤프트의 결합시,When the fixing member and the shaft are engaged,상기 돌출편은 축방향으로 절곡되는 드론용 모터.And the protruding piece is bent in the axial direction.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2017-0098594 | 2017-08-03 | ||
KR1020170098594A KR102371384B1 (en) | 2017-08-03 | 2017-08-03 | Motor for drone |
KR1020170135842A KR102491350B1 (en) | 2017-10-19 | 2017-10-19 | Motor for drone and drone having the same |
KR10-2017-0135842 | 2017-10-19 |
Publications (1)
Publication Number | Publication Date |
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WO2019027195A1 true WO2019027195A1 (en) | 2019-02-07 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2018/008589 WO2019027195A1 (en) | 2017-08-03 | 2018-07-30 | Drone motor |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110203407A (en) * | 2019-06-13 | 2019-09-06 | 福州大学 | Six rotor wing unmanned aerial vehicle transmission component mounting structures and installation method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755698A (en) * | 1952-11-04 | 1956-07-24 | Waldes Kohinoor Inc | Retaining ring having shaft engaging projections to prevent inadvertent withdrawal |
US20050135947A1 (en) * | 2003-12-22 | 2005-06-23 | Valeo Electrical Systems, Inc. | Engine cooling fan motor with reduced water entry protection |
US20120298330A1 (en) * | 2010-11-19 | 2012-11-29 | Purcell Systems, Inc. | Air path rain guard for a cooling system of a weatherproof enclosure for electrical equipment and the like |
US20150129711A1 (en) * | 2013-11-13 | 2015-05-14 | Parrot | Rotary-wing drone with gearless-drive and fast-mounting propellers |
CN105262265A (en) * | 2015-11-13 | 2016-01-20 | 汕头市杰泰电子科技有限公司 | Outer rotor casing of brushless DC motor and manufacturing process thereof |
WO2016172891A1 (en) * | 2015-04-29 | 2016-11-03 | 深圳市大疆创新科技有限公司 | Electric motor, power device and unmanned aircraft using the power device |
-
2018
- 2018-07-30 WO PCT/KR2018/008589 patent/WO2019027195A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2755698A (en) * | 1952-11-04 | 1956-07-24 | Waldes Kohinoor Inc | Retaining ring having shaft engaging projections to prevent inadvertent withdrawal |
US20050135947A1 (en) * | 2003-12-22 | 2005-06-23 | Valeo Electrical Systems, Inc. | Engine cooling fan motor with reduced water entry protection |
US20120298330A1 (en) * | 2010-11-19 | 2012-11-29 | Purcell Systems, Inc. | Air path rain guard for a cooling system of a weatherproof enclosure for electrical equipment and the like |
US20150129711A1 (en) * | 2013-11-13 | 2015-05-14 | Parrot | Rotary-wing drone with gearless-drive and fast-mounting propellers |
WO2016172891A1 (en) * | 2015-04-29 | 2016-11-03 | 深圳市大疆创新科技有限公司 | Electric motor, power device and unmanned aircraft using the power device |
CN105262265A (en) * | 2015-11-13 | 2016-01-20 | 汕头市杰泰电子科技有限公司 | Outer rotor casing of brushless DC motor and manufacturing process thereof |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110203407A (en) * | 2019-06-13 | 2019-09-06 | 福州大学 | Six rotor wing unmanned aerial vehicle transmission component mounting structures and installation method |
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