A High Magnetic Density Outer Rotor Permanent Magnet Motor and Method for Unmanned Aerial Vehicles

Abstract

The present invention discloses a high magnetic density outer rotor permanent magnet motor and method for an unmanned aerial vehicle, relating to the technical field of aircraft electromechanics. It includes an outer rotor, with a plurality of permanent magnets fixedly connected to the inner wall of the outer rotor. A support sleeve is arranged inside the outer rotor, and an inner stator core is arranged inside the outer rotor. The inner stator core is sleeved outside the support sleeve, and a stator winding is fixedly connected to the outside of the inner stator core. A rear end cover is arranged on the side of the inner stator core away from the outer rotor. It further includes: a storage frame and a conduit are fixedly connected to one side of the rear end cover. The coolant inside the storage frame flows into the conduit. The conduit is arranged in a spiral shape and is made of a metal material with good thermal conductivity. When the blowing member sucks in the external air, the air passes through the conduit, thereby further cooling the air. When the cooled cold air contacts the heat conducting member, the cooling effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of aircraft electromechanical technology, and particularly to a high magnetic density outer rotor permanent magnet motor and method for an unmanned aerial vehicle. Background Art

[0002] An outer rotor motor has an external rotor assembly, and a plurality of winding coils are included in the internal stator assembly. The rotor assembly can rotate in a magnetic field. Outer rotor motors are commonly used in many different applications, including household appliances, industrial equipment, power tools, etc. They have advantages such as high efficiency, low noise, and small vibration.

[0003] A permanent magnet outer rotor motor disclosed in a patent application with a reference publication number of CN114243981B includes a plastic-sealed rotor assembly, a plastic-sealed stator assembly, and a plastic-sealed end cover. The plastic-sealed rotor assembly has an installation cavity, and the plastic-sealed stator assembly is arranged in the installation cavity. The plastic-sealed stator assembly includes a wound stator, a rotating shaft, and stator plastic sealing. The center of the wound stator has an installation hole, and the rotating shaft is arranged in the installation hole. The diameter of the installation hole is larger than the diameter of the rotating shaft. The plastic-sealed stator assembly is installed in the installation cavity between the plastic-sealed rotor assembly and the plastic-sealed end cover. The rotating shaft is connected to the plastic-sealed rotor assembly and the plastic-sealed end cover through bearings. The stator plastic sealing fills the gap between the rotating shaft and the installation hole and covers the end faces at both ends of the wound stator. Thus, the rotating shaft, the wound stator, and the bearings are separated by the stator plastic sealing, insulating them from each other. The voltage of the permanent magnet outer rotor motor cannot break down the stator plastic sealing, thus avoiding the problem of electric corrosion damage to the bearings and extending the reliability and service life of the permanent magnet outer rotor motor.

[0004] Due to the special structure of the outer rotor motor (the rotor is located on the outside), and the stator is inside, the stator that generates a large amount of heat is inside, resulting in an easy increase in the internal temperature, causing a performance decline or shortened life due to heat accumulation, and it is impossible to efficiently cool the stator and the inside of the motor. And when the motor has an abnormal temperature rise, the existing air cooling and water cooling cannot quickly and directly cool it, and it often takes a certain amount of time to cool by means of heat transfer.

[0005] Therefore, it is necessary to provide a high magnetic density outer rotor permanent magnet motor and method for an unmanned aerial vehicle to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a high magnetic density outer rotor permanent magnet motor and method for an unmanned aerial vehicle to solve the problem of the defects of the prior art proposed in the above background art.

[0007] Based on the above ideas, the present invention provides the following technical solutions: A high magnetic density outer rotor permanent magnet motor for an unmanned aerial vehicle, comprising an outer rotor, wherein a plurality of permanent magnets are fixedly connected to the inner wall of the outer rotor, a support sleeve is arranged inside the outer rotor, an inner stator core is arranged inside the outer rotor, the inner stator core is sleeved outside the support sleeve, and a stator winding is fixedly connected to the outside of the inner stator core. A rear end cover is arranged on the side of the inner stator core away from the outer rotor, and further comprising:

[0008] A support frame, which is arranged between the rear end cover and the inner stator core and is used for supporting and fixing the inner stator core. A heat conducting member is arranged on the outside of the support frame;

[0009] A rotating shaft, which passes through the outer rotor and is fixedly connected to the outer rotor. A blowing member is arranged on one side of the rear end cover, and a transmission member is arranged between the rotating shaft and the blowing member for driving the blowing member to rotate;

[0010] A storage frame, which is fixedly connected to the side of the rear end cover away from the outer rotor, and a conduction pipe is fixedly connected and communicated inside the storage frame. A coolant is stored inside the storage frame and the conduction pipe;

[0011] A plurality of heat dissipation mechanisms arranged annularly around the support frame, the heat dissipation mechanism comprising a triggering component and an atomizing component. When the temperature rises, the triggering component triggers the atomizing component to spray and cool the stator winding and the outer rotor.

[0012] As a further scheme of the present invention: The support frame includes a second support ring, the second support ring is fixedly connected to the side of the rear end cover close to the inner stator core, and a first support ring is fixedly connected to the side of the second support ring close to the inner stator core.

[0013] As a further scheme of the present invention: The blowing member includes:

[0014] A rotating sleeve, which is arranged on the side of the rear end cover close to the inner stator core, and the rotating sleeve is rotatably connected to the rear end cover. A first flow channel is arranged on the outside of the rear end cover and is communicated with the rotating sleeve. A plurality of fans are fixedly connected to the outside of the rotating sleeve;

[0015] A fixing ring, which is arranged inside the rotating sleeve, and a plurality of blades are fixedly connected between the fixing ring and the rotating sleeve. The blades are arranged obliquely;

[0016] As a further scheme of the present invention: The transmission member includes:

[0017] A rotating disk, which is fixedly connected to the end of the rotating shaft close to the outer rotor, and the rotating disk is arranged inside the support sleeve;

[0018] An installation cylinder, which is fixedly connected to one side of the rotating disk, and a plurality of second flow channels are arranged on the outside of the installation cylinder;

[0019] The fixed cylinder is fixedly connected to one end of the mounting cylinder away from the rotating disk. The fixed cylinder is hollow and communicates with the mounting cylinder. The fixed ring is fixedly connected to the outer side of the fixed cylinder.

[0020] As a further solution of the present invention: An outer sleeve is sleeved on the outer side of the fixed cylinder. The outer sleeve is rotatably connected to one side of the rotating sleeve and communicates with the rotating sleeve. A rotating sleeve is sleeved on the outer side of the mounting cylinder, and the rotating sleeve communicates through a second flow groove opened on the outer side of the mounting cylinder.

[0021] As a further solution of the present invention: A plurality of heat conducting plates are fixedly connected between the outer sleeve and the rotating sleeve. The plurality of heat conducting plates are all arranged inside the support sleeve. Flow grooves are opened inside the heat conducting plates, and liquid outlet grooves and liquid inlet grooves are respectively arranged at both ends of the flow grooves. The liquid inlet groove communicates with the outer sleeve, and the liquid outlet groove communicates with the rotating sleeve. One side of the rear end cover is fixedly connected with a communicating cylinder, and the communicating cylinder communicates with the storage frame through a first conduit. A plurality of second conduits are arranged outside the transfer conduit. One ends of the plurality of second conduits are fixedly communicated with a connecting cylinder. The connecting cylinder is fixedly connected to the outer side of the rear end cover and communicates with the rotating sleeve through a first flow groove.

[0022] As a further solution of the present invention: The atomization assembly includes:

[0023] A fixed frame is fixedly connected to one side of the rear end cover, and an extrusion plate is arranged inside the fixed frame.

[0024] A sliding plate is fixedly connected to the top of the extrusion plate. The sliding plate penetrates through the fixed frame and is slidably connected to the fixed frame. A spring is sleeved on the outer side of the sliding plate. Both ends of the spring are fixedly connected to the extrusion plate and the fixed frame respectively. A contact wheel is rotatably connected to one end of the sliding plate away from the fixed frame.

[0025] A liquid inlet pipe is fixedly communicated with the bottom of the fixed frame at one end and communicates with the storage frame at the other end. A one-way liquid inlet valve is arranged outside the liquid inlet pipe.

[0026] A liquid outlet pipe is fixedly communicated with the bottom of the fixed frame, and the other end of the liquid outlet pipe is fixedly connected with an atomizing nozzle for atomization. A one-way liquid outlet valve is arranged outside the liquid outlet pipe.

[0027] As a further solution of the present invention: The trigger assembly includes:

[0028] A fixed shaft is fixedly connected to the first support ring;

[0029] A fuse is fixedly connected to the outer side of the fixed shaft, and a fixing piece is fixedly connected to one end of the fuse;

[0030] A traction wire is fixedly connected to one end of the fixing piece. The traction wire passes through the bottom of the fixed frame and is fixedly connected to the extrusion plate for downward traction of the extrusion plate.

[0031] Multiple contact blocks are fixedly connected to the inner side of the outer rotor. When the sliding plate rises, it contacts the contact blocks, and the contact blocks squeeze the sliding plate downward.

[0032] As a further solution of the present invention: The heat conducting member includes:

[0033] Multiple heat conducting support plates are arranged annularly around the first support ring, and a heat conducting ring is fixedly connected between the multiple heat conducting support plates, and heat conduction is carried out through the heat conducting ring and the heat conducting support plates.

[0034] A usage method of a high magnetic density outer rotor permanent magnet motor for an unmanned aerial vehicle includes the following steps:

[0035] Step 1: Fix the rotating shaft to the input end of the external unmanned aerial vehicle. Through the stator winding on the outer side of the inner stator core, the stator winding causes the outer rotor with the permanent magnet belt to rotate, and the outer rotor drives the rotating shaft to rotate.

[0036] Step 2: During the working process, the rotating shaft drives the blowing member to rotate through the transmission member, and takes away the heat transferred by the heat conducting member inside the outer rotor.

[0037] Step 3: And the temperature is monitored through the trigger assembly on the outer side of the outer rotor support frame. When the temperature rises to the set temperature, the trigger assembly drives the atomizing assembly to spray the coolant inside the storage frame for cooling.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] 1. The rotating shaft drives the blowing member to rotate through the transmission member, and takes away the heat transferred by the heat conducting member inside the outer rotor. And when the blowing member rotates, a storage frame and a transmission pipe are fixedly connected to one side of the rear end cover. The coolant inside the storage frame flows into the transmission pipe. The transmission pipe is arranged in a spiral shape and is made of a metal material with good heat conductivity. When the blowing member sucks in the external air, the air passes through the transmission pipe, so that the air is further cooled. When the cooled cold air contacts the heat conducting member, the cooling effect is improved.

[0040] 2. Push the coolant inside the transmission pipe and the storage frame between the outer sleeve and the fixed cylinder, and flow into the flow groove through the liquid inlet groove. The coolant flows in the flow groove and takes away the heat on the support sleeve. And it enters the rotating sleeve through the liquid outlet groove. The coolant with heat enters the fixed cylinder through the second flow groove opened on the outer side of the installation cylinder, and enters the storage frame through the connecting cylinder for circulation, so as to ensure the cooling of the inner stator core, make the coolant circulate and cool, ensure that the equipment can be continuously dissipated heat, and efficiently dissipate heat from the inner stator core and the stator winding.

[0041] 3. When the temperature rises, the fixing piece will be elongated and deformed, so that the spring pulls the pressing plate to rise, and the sliding plate can rise correspondingly with the change of temperature. The coolant sprayed by the atomization assembly will also increase with the rise of temperature. When the temperature drops, the fixing piece resets, thereby reducing the spraying amount of the atomization assembly and avoiding waste. It can be adjusted adaptively according to the temperature.

[0042] 4. When the temperature inside the device suddenly rises abnormally and rapidly, the fuse is made of fusible metal and will break, so that the atomization assembly sprays rapidly at the maximum amount to protect the device from abnormal temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described below with reference to the drawings and embodiments.

[0044] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0045] Figure 2 is a schematic diagram of the storage box structure of the present invention;

[0046] Figure 3 is a schematic diagram of the separation structure of the outer rotor and the rear end cover of the present invention;

[0047] Figure 4 is a schematic diagram of the rear end cover structure of the present invention;

[0048] Figure 5 is a schematic diagram of the support frame structure of the present invention;

[0049] Figure 6 is a schematic diagram of the outer sleeve structure of the present invention;

[0050] Figure 7 is a schematic diagram of the sectional view of the fixed cylinder of the present invention;

[0051] Figure 8 is the present invention Figure 6 A partial enlarged schematic diagram;

[0052] Figure 9 is a schematic diagram of the sectional view of the heat conducting plate of the present invention;

[0053] Figure 10 is a schematic diagram of the inner stator core structure of the present invention;

[0054] Figure 11 is the present invention Figure 10 B partial enlarged schematic diagram;

[0055] Figure 12 is a schematic diagram of the atomization assembly structure of the present invention;

[0056] Figure 13 is a schematic diagram of the sectional view of the fixed frame of the present invention.

[0057] In the figure: 1. Outer rotor; 101. Permanent magnet; 102. Support sleeve; 104. Contact block; 2. Rear end cover; 3. Inner stator core; 301. Stator winding; 4. Rotating shaft; 501. First support ring; 502. Second support ring; 503. Heat conduction ring; 504. Heat conduction support plate; 6. Rotating disc; 601. Installation cylinder; 602. Fixed cylinder; 603. Rotating sleeve; 604. Fixed ring; 605. Blade; 606. Fan; 7. Storage frame; 701. Conduit; 702. Connecting cylinder; 703. First conduit; 704. Second conduit; 8. Outer sleeve; 801. Rotating sleeve; 9. Heat conduction plate; 901. Flow groove; 902. Liquid outlet groove; 903. Liquid inlet groove; 10. Fixed shaft; 1001. Fuse; 1002. Fixing piece; 1003. Traction wire; 11. Fixed frame; 111. Extrusion plate; 112. Sliding plate; 113. Contact wheel; 114. Spring; 115. Liquid outlet pipe; 116. Liquid inlet pipe; 117. Atomizing nozzle. Detailed implementation manners

[0058] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0059] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0060] As Figures 1 to 13 shown, a high magnetic density outer rotor permanent magnet motor and method for an unmanned aerial vehicle include the following embodiments:

[0061] Embodiment 1: As Figures 1 to 6 shown, a high magnetic density outer rotor permanent magnet motor for an unmanned aerial vehicle includes an outer rotor 1. A plurality of permanent magnets 101 are fixedly connected to the inner wall of the outer rotor 1. A support sleeve 102 is arranged inside the outer rotor 1. An inner stator core 3 is arranged inside the outer rotor 1. The inner stator core 3 is sleeved outside the support sleeve 102, and a stator winding 301 is fixedly connected to the outside of the inner stator core 3. A rear end cover 2 is arranged on the side of the inner stator core 3 away from the outer rotor 1. It further includes:

[0062] A support frame, which is arranged between the rear end cover 2 and the inner stator core 3 and is used to support and fix the inner stator core 3. A heat conducting member is arranged on the outside of the support frame;

[0063] The rotating shaft 4 passes through the outer rotor 1 and is fixedly connected to the outer rotor 1. A blowing member is provided on one side of the rear end cover 2, and a transmission member is provided between the rotating shaft 4 and the blowing member for driving the blowing member to rotate;

[0064] The storage box 7 is fixedly connected to the side of the rear end cover 2 away from the outer rotor 1, and a transmission pipe 701 is fixedly connected and communicated inside the storage box 7. The storage box 7 and the transmission pipe 701 store coolant;

[0065] A plurality of heat dissipation mechanisms are arranged annularly around the support frame. The heat dissipation mechanism includes a trigger component and an atomization component. When the temperature rises, the trigger component triggers the atomization component to spray and cool the stator winding 301 and the outer rotor 1.

[0066] During specific implementation, the rotating shaft 4 is fixed to the input end of the external drone. Through the stator winding 301 outside the inner stator core 3, the stator winding 301 drives the outer rotor 1 to rotate through the permanent magnet 101. The outer rotor 1 drives the rotating shaft 4 to rotate. During the working process, the rotating shaft 4 drives the blowing member to rotate through the transmission member to take away the heat transferred by the heat conducting member inside the outer rotor 1. And when the blowing member rotates, a storage box 7 and a transmission pipe 701 are fixedly connected to one side of the rear end cover 2. The coolant inside the storage box 7 flows into the transmission pipe 701. The transmission pipe 701 is set in a spiral shape and is made of a metal material with good heat conductivity. When the blowing member inhales the external air, the air is further cooled after passing through the transmission pipe 701. When the cooled cold air contacts the heat conducting member, the cooling effect is improved;

[0067] And the temperature is monitored by the trigger component outside the support frame of the outer rotor 1. When the temperature rises to the set temperature, the trigger component drives the atomization component to spray the coolant inside the storage box 7 for cooling, which can quickly and directly cool the outer rotor 1 and the inner stator core 3. The coolant can be a fluorinated liquid. The fluorinated liquid has a significantly higher thermal conductivity than traditional cooling media due to its high heat conduction performance, and can directly contact heat sources such as chips and electronic components, quickly absorb and transfer heat to the cooling system, and quickly and directly cool the internal contact, ensuring the temperature inside the outer rotor 1 and the inner stator core 3.

[0068] In this embodiment, as Figures 4 to 8 shown, the support frame includes a second support ring 502, which is fixedly connected to the side of the rear end cover 2 close to the inner stator core 3, and a first support ring 501 is fixedly connected to the side of the second support ring 502 close to the inner stator core 3.

[0069] The blowing member includes:

[0070] The rotating sleeve 603 is disposed on the side of the rear end cover 2 close to the inner stator core 3, and the rotating sleeve 603 is rotatably connected to the rear end cover 2. A first flow channel is provided on the outer side of the rear end cover 2 and is communicated with the rotating sleeve 603. A plurality of fans 606 are fixedly connected to the outer side of the rotating sleeve 603;

[0071] The fixing ring 604 is disposed inside the rotating sleeve 603, and a plurality of blades 605 are fixedly connected between the fixing ring 604 and the rotating sleeve 603. The blades 605 are inclined;

[0072] The transmission member includes:

[0073] The rotating disk 6 is fixedly connected to one end of the rotating shaft 4 close to the outer rotor 1. The rotating disk 6 is disposed inside the support sleeve 102;

[0074] The mounting cylinder 601 is fixedly connected to one side of the rotating disk 6, and a plurality of second flow channels are formed on the outer side of the mounting cylinder 601;

[0075] The fixing cylinder 602 is fixedly connected to the end of the mounting cylinder 601 away from the rotating disk 6. The fixing cylinder 602 is hollow and is communicated with the mounting cylinder 601. The fixing ring 604 is fixedly connected to the outer side of the fixing cylinder 602.

[0076] The heat conducting member includes:

[0077] A plurality of heat conducting support plates 504 are arranged annularly around the first support ring 501, and a heat conducting ring 503 is fixedly connected between the plurality of heat conducting support plates 504. Heat conduction is performed through the heat conducting ring 503 and the heat conducting support plates 504.

[0078] In specific implementation, when the outer rotor 1 drives the rotating shaft 4 to rotate, the rotating shaft 4 drives the fixedly connected rotating disk 6 to rotate. The rotating disk 6 drives the fixing cylinder 602 to rotate through the mounting cylinder 601, and the outer side of the fixing cylinder 602 rotates through the fixedly connected fixing ring 604 and the blades 605 on the outer side of the fixing ring 604. The blades 605 drive the rotating sleeve 603 to rotate, so that the fans 606 on the outer side of the rotating sleeve 603 rotate. The fans 606 rotate to blow air for heat dissipation inside the whole, and no additional electrical equipment is required for heat dissipation drive.

[0079] Embodiment 2: As Figures 6 to 9 shown, an outer sleeve 8 is sleeved on the outer side of the fixing cylinder 602. The outer sleeve 8 is rotatably connected to one side of the rotating sleeve 603 and is communicated with the rotating sleeve 603. A rotating sleeve 801 is sleeved on the outer side of the mounting cylinder 601, and the rotating sleeve 801 is communicated through the second flow channels formed on the outer side of the mounting cylinder 601.

[0080] A plurality of heat conducting plates 9 are fixedly connected between the outer sleeve 8 and the rotating sleeve 801. The plurality of heat conducting plates 9 are all arranged inside the support sleeve 102. A flow groove 901 is formed inside the heat conducting plate 9, and an outlet groove 902 and an inlet groove 903 are respectively arranged at both ends of the flow groove 901. The inlet groove 903 is communicated with the outer sleeve 8, and the outlet groove 902 is communicated with the rotating sleeve 801. One side of the rear end cover 2 is fixedly connected with a communicating cylinder 702. The communicating cylinder 702 is communicated with the storage frame 7 through a first conduit 703. A plurality of second conduits 704 are arranged outside the transfer conduit 701. One ends of the plurality of second conduits 704 are fixedly communicated with a connecting cylinder. The connecting cylinder is fixedly connected to the outside of the rear end cover 2 and is communicated with the rotating sleeve 603 through a first flow channel.

[0081] During specific implementation, the temperature of the stator winding 301 and the inner stator iron core 3 inside the equipment tends to rise due to poor heat dissipation effect. Therefore, in this solution, by arranging a plurality of heat conducting plates 9 inside the support sleeve 102, and the support sleeve 102 is made of heat conducting metal material, the heat of the inner stator iron core 3 can be quickly transferred. When the heat of the inner stator iron core 3 is transferred to the inner side of the support sleeve 102, the rotating shaft 4 drives the fixed ring 604 to rotate through the mounting cylinder 601 and the fixed cylinder 602 in the transmission member. The fixed ring 604 drives the outer blade 605 to rotate. The blade 605 is inclined, similar to a spiral impeller. A flow channel is formed through the outer sleeve 8, the rotating sleeve 603, the first flow channel and the transfer conduit 701. When the fixed ring 604 rotates, the coolant inside the transfer conduit 701 and the storage frame 7 is pushed between the outer sleeve 8 and the fixed cylinder 602, and flows into the flow groove 901 through the inlet groove 903. The coolant flows in the flow groove 901 to take away the heat on the support sleeve 102, and enters the rotating sleeve 801 through the outlet groove 902. The coolant with heat enters the fixed cylinder 602 through the second flow channel opened on the outside of the mounting cylinder 601, and enters the storage frame 7 through the communicating cylinder 702 for circulation, so as to ensure the cooling of the inner stator iron core 3, make the coolant circulate and cool, ensure continuous heat dissipation of the equipment, and efficiently dissipate heat from the inner stator iron core 3 and the stator winding 301.

[0082] Embodiment 3: As Figures 10 to 13 shown, the atomization assembly includes:

[0083] A fixed frame 11, the fixed frame 11 is fixedly connected to one side of the rear end cover 2, and an extrusion plate 111 is arranged inside the fixed frame 11,

[0084] The sliding plate 112 is fixedly connected to the top of the extrusion plate 111. The sliding plate 112 penetrates through the fixed frame 11 and is slidably connected to the fixed frame 11. A spring 114 is sleeved outside the sliding plate 112, and both ends of the spring 114 are fixedly connected to the extrusion plate 111 and the fixed frame 11 respectively. A contact wheel 113 is rotatably connected to one end of the sliding plate 112 away from the fixed frame 11;

[0085] The liquid inlet pipe 116, one end of the liquid inlet pipe 116 is fixedly communicated with the bottom of the fixed frame 11, the other end is communicated with the storage frame 7, and a one-way liquid inlet valve is arranged outside the liquid inlet pipe 116;

[0086] The liquid outlet pipe 115, the liquid outlet pipe 115 is fixedly communicated with the bottom of the fixed frame 11, and the other end of the liquid outlet pipe 115 is fixedly connected with an atomizing nozzle 117 for atomization. A one-way liquid outlet valve is arranged outside the liquid outlet pipe 115.

[0087] The trigger assembly includes:

[0088] The fixed shaft 10, the fixed shaft 10 is fixedly connected to the first support ring 501;

[0089] The fuse 1001, the fuse 1001 is fixedly connected to the outside of the fixed shaft 10, and one end of the fuse 1001 is fixedly connected with a fixing member 1002;

[0090] The traction wire 1003, the traction wire 1003 is fixedly connected to one end of the fixing member 1002, the traction wire 1003 passes through the bottom of the fixed frame 11 and is fixedly connected to the extrusion plate 111, and is used for pulling the extrusion plate 111 downward;

[0091] A plurality of contact blocks 104, the plurality of contact blocks 104 are fixedly connected to the inside of the outer rotor 1. When the sliding plate 112 rises, it contacts the contact blocks 104, and the contact blocks 104 squeeze the sliding plate 112 downward.

[0092] During specific implementation, when it comes to the gap between the stator winding 301 and the permanent magnet 101, since the outer rotor 1 is in a rotating state, there is a large amount of heat at the gap between the two. When the temperature rises, the trigger assembly starts the atomization assembly to spray the coolant. By contacting between the coolant and the outside of the device, the coolant absorbs heat and evaporates, reducing the temperature of the device. The spring 114 pulls the extrusion plate 111 inside the fixed frame 11 to rise. The extrusion plate 111 drives the sliding plate 112 to rise. The contact wheel 113 at the top of the sliding plate 112 contacts the contact blocks 104 outside the outer rotor 1. When the contact blocks 104 continuously push the contact wheel 113 downward, when the contact wheel 113 rises, the coolant inside the storage frame 7 is sucked in through the liquid inlet pipe 116. When the contact wheel 113 descends, the sliding plate 112 pushes the coolant inside the fixed frame 11 to be discharged through the liquid outlet pipe 115, and is discharged through the atomizing nozzle 117 and sprayed to the outside of the device for cooling treatment;

[0093] Regarding the startup timing of the atomization component, in this solution, the fuse 1001 and the fixing member 1002 pull the extrusion plate 111 downward through the traction wire 1003. When the temperature rises, the fixing member 1002 is made of shape memory metal. Shape memory metal is a special metal material that undergoes plastic deformation within a certain temperature range and can restore its original macroscopic shape within another temperature range. When the temperature rises, the fixing member 1002 will elongate and deform, causing the spring 114 to pull the extrusion plate 111 upward. As the temperature changes, the sliding plate 112 will rise accordingly, and the coolant sprayed by the atomization component will also increase as the temperature rises. When the temperature drops, the fixing member 1002 resets, reducing the amount of coolant sprayed by the atomization component and avoiding waste. It can be adjusted adaptively according to the temperature.

[0094] When the temperature inside the device suddenly rises abnormally and rapidly, the fuse 1001 is made of fusible metal, which is a metal material that can be fused at a specified temperature. Specific details are not described here and can be selected according to actual needs. When the fuse 1001 breaks, the atomization component will spray the maximum amount of coolant quickly to protect the device from abnormal temperature rise.

[0095] A method for using a high magnetic density outer rotor permanent magnet motor for a drone is also provided, including the following steps:

[0096] Step 1: Fix the rotating shaft 4 to the input end of the external drone. Through the stator winding 301 on the outer side of the inner stator core 3, the stator winding 301 causes the outer rotor 1 driven by the permanent magnet 101 to rotate, and the outer rotor 1 drives the rotating shaft 4 to rotate.

[0097] Step 2: During the working process, the rotating shaft 4 drives the blowing member to rotate through the transmission member to take away the heat transferred by the heat conducting member inside the outer rotor 1.

[0098] Step 3: And the temperature is monitored through the trigger component on the outer side of the support frame of the outer rotor 1. When the temperature rises to the set temperature, the trigger component drives the atomization component to spray the coolant inside the storage box 7 for cooling.

[0099] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0100] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0101] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A high magnetic density outer rotor permanent magnet motor for an unmanned aerial vehicle, comprising an outer rotor (1), a plurality of permanent magnets (101), a support sleeve (102), an inner stator core (3) and a stator winding (301), wherein a rear end cover (2) is provided on one side of the inner stator core (3), and the motor is characterized in that: Also includes: A support frame, the support frame is arranged between the rear end cover (2) and the inner stator core (3), and is used to support and fix the inner stator core (3), and a heat conducting member is arranged on the outer side of the support frame; a rotating shaft (4), the rotating shaft (4) passing through the outer rotor (1) and being fixedly connected to the outer rotor (1); a blowing member is provided on one side of the rear end cover (2); a transmission member is provided between the rotating shaft (4) and the blowing member for driving the blowing member to rotate; A storage frame (7), the storage frame (7) being fixedly connected to a side of the rear end cover (2) away from the outer rotor (1), and the inner side of the storage frame (7) being fixedly connected to a conduction pipe (701), wherein coolant is stored inside the storage frame (7) and the conduction pipe (701); A plurality of heat dissipation mechanisms are arranged in an annular manner around the support frame, the heat dissipation mechanisms comprising a trigger component and an atomization component, and when the temperature rises, the trigger component triggers the atomization component to spray and cool the stator winding (301) and the outer rotor (1); The transmission member comprises: a rotating disk (6), the rotating disk (6) being fixedly connected to one end of the rotating shaft (4) close to the outer rotor (1), the rotating disk (6) being arranged on the inner side of the support sleeve (102); a mounting tube (601), the mounting tube (601) being fixedly connected to one side of the rotating disk (6), and a plurality of second flow grooves being provided on the outer side of the mounting tube (601); a fixed tube (602), the fixed tube (602) being fixedly connected to one end of the mounting tube (601) away from the rotating disk (6), the fixed tube (602) being arranged to be hollow and in communication with the mounting tube (601), and a fixed ring (604) being fixedly connected to the outer side of the fixed tube (602); The atomizing assembly comprises: A fixed frame (11), the fixed frame (11) being fixedly connected to one side of the rear end cover (2), and an extrusion plate (111) being arranged inside the fixed frame (11); A sliding plate (112), the sliding plate (112) being fixedly connected to the top of the extrusion plate (111), the sliding plate (112) passing through the fixed frame (11) and being slidably connected to the fixed frame (11), and a spring (114) being sleeved on the outer side of the sliding plate (112), two ends of the spring (114) being respectively fixedly connected to the extrusion plate (111) and the fixed frame (11), and one end of the sliding plate (112) away from the fixed frame (11) being rotatably connected to a contact wheel (113); a liquid inlet pipe (116), one end of the liquid inlet pipe (116) being fixedly connected to the bottom of the fixed frame (11), and the other end of the liquid inlet pipe (116) being connected to the storage frame (7), and a one-way liquid inlet valve being arranged on the outside of the liquid inlet pipe (116); a liquid outlet pipe (115), the liquid outlet pipe (115) being fixedly connected to the bottom of the fixed frame (11), and the other end of the liquid outlet pipe (115) being fixedly connected to an atomizing nozzle (117) for atomization, and a one-way liquid outlet valve being arranged on the outside of the liquid outlet pipe (115); The trigger component comprises: A fixed shaft (10), the fixed shaft (10) being fixedly connected to the first support ring (501); A fuse (1001), the fuse (1001) is fixedly connected to the outside of the fixed shaft (10), and one end of the fuse (1001) is fixedly connected to a fixing member (1002); A traction wire (1003), the traction wire (1003) is fixedly connected to one end of the fixing member (1002), the traction wire (1003) passes through the bottom of the fixing frame (11) and is fixedly connected to the extrusion plate (111), and is used to pull the extrusion plate (111) downward; A plurality of contact blocks (104) are fixedly connected to the inner side of the outer rotor (1); when the sliding plate (112) rises and contacts the contact blocks (104), the contact blocks (104) press the sliding plate (112) downward.

2. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: The support frame comprises a second support ring (502), the second support ring (502) being fixedly connected to a side of the rear end cover (2) close to the inner stator core (3), and the first support ring (501) being fixedly connected to a side of the second support ring (502) close to the inner stator core (3).

3. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: The blowing member comprises: A rotating sleeve (603), the rotating sleeve (603) being arranged on a side of the rear end cover (2) close to the inner stator core (3), and the rotating sleeve (603) being rotatably connected to the rear end cover (2), a first flow slot being arranged on the outer side of the rear end cover (2) and being in communication with the rotating sleeve (603), and a plurality of fans (606) being fixedly connected to the outer side of the rotating sleeve (603); A fixed ring (604) is arranged inside the rotating sleeve (603), and a plurality of blades (605) are fixedly connected between the fixed ring (604) and the rotating sleeve (603), and the blades (605) are arranged in an inclined manner.

4. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: An outer sleeve (8) is sleeved on the outside of the fixed sleeve (602), the outer sleeve (8) is rotatably connected to one side of the rotating sleeve (603), and the outer sleeve (8) is communicated with the rotating sleeve (603). A rotating sleeve (801) is sleeved on the outside of the installation sleeve (601), and the rotating sleeve (801) is communicated with the second flow groove provided on the outside of the installation sleeve (601).

5. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 4, characterized in that: A plurality of heat conducting plates (9) are fixedly connected between the outer sleeve (8) and the rotating sleeve (801), and the plurality of heat conducting plates (9) are all arranged on the inner side of the support sleeve (102). A flow groove (901) is provided inside the heat conducting plate (9), and a liquid outlet groove (902) and a liquid inlet groove (903) are respectively arranged at two ends of the flow groove (901), the liquid inlet groove (903) is communicated with the outer sleeve (8), and the liquid outlet groove (902) is communicated with the rotating sleeve (801). A connecting tube (702) is fixedly connected to one side of the rear end cover (2), and the connecting tube (702) is communicated with the storage frame (7) through a first conduit (703). A plurality of second conduits (704) are arranged on the outer side of the conducting tube (701), and one end of the plurality of second conduits (704) is fixedly connected to a connecting tube, which is fixedly connected to the outer side of the rear end cover (2) and is communicated with the rotating sleeve (603) through the first flow groove.

6. The high magnetic density outer rotor permanent magnet motor for unmanned aerial vehicles according to claim 2, characterized in that: The heat conducting member comprises: A plurality of heat-conducting support plates (504) are provided in a ring shape around the first support ring (501), and a heat-conducting ring (503) is fixedly connected between the plurality of heat-conducting support plates (504), and heat conduction is performed through the heat-conducting ring (503) and the heat-conducting support plates (504).

7. A method for using a high magnetic density outer rotor permanent magnet motor for a drone, applicable to a high magnetic density outer rotor permanent magnet motor for a drone as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Fix the rotating shaft (4) to the input end of the external drone, and make the stator winding (301) rotate through the outer rotor (1) driven by the permanent magnet (101) through the stator winding (301) outside the inner stator core (3), so that the outer rotor (1) drives the rotating shaft (4) to rotate; Step 2: During operation, the rotating shaft (4) drives the blowing member to rotate via the transmission member, thereby taking away the heat transferred by the internal heat-conducting member of the outer rotor (1); Step three: The temperature is monitored by a trigger component on the outside of the outer rotor (1) support frame. When the temperature rises to a set temperature, the trigger component drives the atomization component to spray the coolant inside the storage frame (7) to cool it down.

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