Rapid cooling structure of motor for unmanned aerial vehicle

Abstract

The invention provides a rapid cooling structure of a motor for an unmanned aerial vehicle, and belongs to the technical field of aircrafts. The motor shell is sleeved with the cooling sleeve of the liquid cooling assembly, direct liquid cooling of the motor is achieved through the cooling sleeve, the cooling sleeve is sleeved with the sleeve of the air cooling assembly, the end, provided with the air passing opening, of the motor shell abuts against the inner sleeve, and the inner sleeve is coaxially sleeved with the inner cylinder connected to one end of the sleeve. An N-shaped air channel of a guide part in the air cooling assembly communicates with a sleeve and an inner sleeve, so that airflow generated by operation of blades of the unmanned aerial vehicle can be guided into the sleeve and the inner sleeve through the air channel, the cooling sleeve and the interior of the motor are cooled through the airflow in the sleeve and the inner sleeve, direct air cooling of the interior of the motor can be achieved, and the cooling effect of the motor is improved. The liquid cooling assembly can be cooled in an auxiliary mode, the coupling effect of air cooling and liquid cooling is achieved, the cooling efficiency is higher, the problem that the cooling efficiency is low due to the fact that an intermediate structure needs to be arranged for conducting heat is solved, and performance output of the motor is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft, and in particular to a quick cooling structure of a motor for an unmanned aerial vehicle (UAV). Background Art

[0002] As a low-altitude aircraft, drones can meet the needs of multiple scenarios when equipped with relevant structures and equipment, such as urban management and environmental monitoring, agricultural management, surveying and mapping and engineering monitoring, logistics and emergency transportation, film and television shooting and security inspections. Operators only need to control them remotely, which not only improves safety but also enhances the comprehensiveness of data, reduces operational burden and improves efficiency. They are favored by consumers from all walks of life.

[0003] At present, the most common drones on the market are usually multi-rotor drones, which generally adopt a four-axis, six-axis or eight-axis design and are suitable for use in cities or complex environments. In addition, most of the existing drones are electric drones, which use a power supply to power the motor and drive the blades to rotate to achieve flight. Therefore, the motor is the core structure of the normal flight of the drone, and it is necessary to ensure the performance output of the motor during the flight of the drone. Since the motor generates heat during operation, the heat will cause its internal resistance to increase, affecting power output and increasing energy consumption. It can also cause the magnetic force of the permanent magnet to decay, affecting the energy conversion efficiency, thereby affecting the performance output of the motor. Therefore, the industry needs to consider cooling the motor to ensure the performance output of the motor. At present, existing drone motors, such as a method for cooling drone motors disclosed in patent application CN112441241A, are provided by installing cooling fins on the surface of the drone arm and setting heat pipes on the cooling fins and the surface of the motor housing. At the same time, the cooling fins are fin structures so that the heat of the motor can be transferred to the cooling fins on the surface of the drone arm through the motor housing and the heat pipes. During use, the rotating propellers generate downward airflow, which passes through the cooling fins on the drone's arms and removes heat as it passes through the cooling fins, thereby cooling the drone's motor. Although the above structure can cool the motor, the heat generated by the motor must first be transferred to the cooling fins through a heat pipe, and then cooled by air cooling. This involves multiple heat transfers, and ultimately cooling is achieved only through air cooling, which has a very limited cooling effect. The heat itself is still concentrated in the motor housing and inside the motor, which still has a significant impact on the operation of the motor. Summary of the Invention

[0004] In response to the above-mentioned problems existing in the prior art, the present invention aims to provide a quick cooling structure for a motor for a drone, so that a liquid cooling component and an air cooling component are set to act on the motor at the same time, and the air cooling component also acts on the liquid cooling component, and the air flow generated by the flight acts on the liquid cooling component to cool the liquid cooling component, thereby realizing the coupling of liquid cooling and air cooling and improving the cooling effect. Moreover, both liquid cooling and air cooling act directly on the motor, reducing the problem of low cooling efficiency caused by conduction through the intermediate structure, ensuring the cooling effect, and benefiting the performance output of the motor.

[0005] The specific technical solutions are as follows: A quick cooling structure for a motor for a drone includes a motor housing, a rotor, a stator, and an end cap. The motor housing is arranged in a barrel shape, with an end cap mounted at the barrel end of the motor housing. The rotor is rotatably mounted within the motor housing, with its ends respectively rotatably mounted on the barrel bottom and the end cap of the motor housing. The stator is coaxially sleeved outside the rotor and fixed to the inner wall of the motor housing. The structure has the following features and further includes: The liquid cooling assembly includes a cooling jacket, a liquid cooling circulation component, a radiator, and a liquid cooling medium. The cooling jacket is sleeved on the outside of the motor housing. A spiral cooling groove is provided on the inner wall of the cooling jacket. One side of the spiral cooling groove is attached to the motor housing. At the same time, a liquid inlet and a liquid outlet are provided on the cooling jacket and are respectively connected to the two ends of the spiral cooling groove. The cooling circulation component is provided in the circulation pipeline between the liquid inlet and the liquid outlet. The liquid cooling medium is filled in the spiral cooling groove, the cooling circulation component, and the circulation pipeline. At the same time, a radiator is also installed in the circulation pipeline. The air-cooling component includes a guide and a sleeve. The sleeve is sleeved on the outside of the cooling sleeve. An inner sleeve is coaxially arranged at one end of the sleeve. One end of the inner sleeve abuts against the bottom of the barrel of the motor housing. At the same time, an air outlet connected to the inner sleeve is opened on the bottom of the barrel of the motor housing. The guide includes an air duct arranged in an "N" shape. The guide is arranged outside the sleeve. The guide is located below the impeller. The upper end of the guide is the air inlet and is arranged toward the impeller. The lower end of the guide is the air outlet and is connected to both the sleeve and the inner sleeve.

[0006] The above-mentioned quick cooling structure of the motor for drone, wherein the liquid cooling circulation component includes a liquid pump and an impeller, the liquid pump is arranged at the bottom of the motor, the impeller is installed on the pump shaft of the liquid pump, and the impeller is arranged at the end of the sleeve away from the connecting guide.

[0007] In the above-mentioned quick cooling structure of a motor for a drone, the radiator includes a plurality of cooling fins, the plurality of cooling fins are arranged on the support arm of the drone, and the circulation pipeline passes through each cooling fin in sequence.

[0008] The above-mentioned fast cooling structure of the motor for drone, wherein the guide also includes an air collecting disk, which is a funnel structure, with the large end of the air collecting disk arranged toward the blade, and the small end of the air collecting disk connected to the air inlet of the air duct.

[0009] The above-mentioned quick cooling structure of a motor for an unmanned aerial vehicle, wherein the guide includes an outer barrel, an inner barrel, an intermediate barrel and a water storage chamber, the outer barrel and the inner barrel are coaxially arranged, a gap is set between the outer barrel and the inner barrel, a mounting hole is opened at the bottom of the outer barrel, the mounting hole is sleeved on the outer side wall of the upper end of the sleeve, the lower end of the inner barrel is connected to the upper end of the sleeve, the inner barrel is sleeved outside the inner sleeve and a gap is set between the two, and there is a height difference between the bottom of the outer barrel and the upper end of the sleeve in its axial direction to form a water storage chamber, the intermediate barrel includes an outer baffle and an inner baffle, and the outer baffle and the inner baffle are arranged in a "V" shape, the intermediate barrel is arranged between the outer barrel and the inner barrel and is located at the upper part of the gap between the two, and a gap is set between the outer baffle and the inner wall of the outer barrel, and a gap is set between the inner baffle and the inner barrel.

[0010] The above-mentioned quick cooling structure of the motor for a drone also includes a water absorbing component and / or a dehumidifying component, which is placed in the water storage chamber. The bottom of the outer barrel is also provided with a plurality of drainage holes, and plugs are removably installed in the drainage holes.

[0011] In the above-mentioned fast cooling structure of a motor for a drone, a heat conducting plate is provided between the cooling jacket and the sleeve, the heat conducting plates are distributed in a circular array with the axis of the cooling jacket as the axis center, and one side of the heat conducting plate is connected to the outer wall of the cooling jacket.

[0012] In the above-mentioned quick cooling structure of the motor for a drone, a plurality of support rods are provided between the inner cylinder and the inner sleeve and between the inner cylinder and the intermediate cylinder. At the same time, one end of the intermediate cylinder is connected to the wind collecting disk.

[0013] The above-mentioned fast cooling structure of the motor for an unmanned aerial vehicle also includes a support frame, which includes an upper frame and a lower frame distributed in upper and lower layers. The upper frame is sleeved on the outside of the motor housing, and a number of ventilation holes are opened on the upper frame. The liquid pump is installed on the lower frame, and the impeller is arranged between the upper frame and the lower frame.

[0014] In the above-mentioned quick cooling structure of the motor for a drone, the upper frame of the support frame and the sleeve are connected in a detachable manner.

[0015] The positive effects of the above technical solution are: The above-mentioned rapid cooling structure of the motor for the drone is achieved by installing a cooling jacket with a liquid cooling assembly on the motor housing to achieve liquid cooling of the motor. At the same time, a sleeve of an air cooling assembly is also installed outside the cooling jacket, and an inner sleeve is provided in the sleeve, which abuts against the motor housing and communicates with the air outlet on the motor housing. At the same time, the air cooling assembly also includes a guide with an "N"-shaped air duct, the air outlet of the air duct is connected to the sleeve and the inner sleeve, so that the airflow generated by the blades can be guided through the air duct to pass through the sleeve and the inner sleeve, and the sleeve is used to achieve auxiliary cooling of the liquid cooling assembly, realizing the coupling of air cooling and liquid cooling. At the same time, the airflow can also be guided to the interior of the motor through the inner sleeve to achieve internal air cooling, achieving efficient cooling of the motor. In addition, both the air cooling assembly and the liquid cooling assembly act directly on the motor itself, without an intermediate heat conduction structure, reducing the problem of low cooling efficiency caused by conduction of the intermediate structure, and achieving better cooling effect, which is beneficial to the performance output of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of an embodiment of a quick cooling structure for a motor for a drone according to the present invention; Figure 2 A combined cross-sectional view of an air cooling assembly and a liquid cooling assembly according to a preferred embodiment of the present invention; Figure 3 A structural diagram showing a combination of an air cooling component and a liquid cooling component according to a preferred embodiment of the present invention from one perspective; Figure 4 This is a structural diagram from another perspective of the combination of an air cooling component and a liquid cooling component in a preferred embodiment of the present invention.

[0017] In the accompanying drawings: 1. Motor housing; 11. Air inlet; 2. Rotor; 3. Stator; 4. End cover; 5. Liquid cooling assembly; 51. Cooling jacket; 52. Liquid cooling circulation component; 511. Spiral cooling trough; 512. Heat conducting plate; 521. Liquid pump; 522. Impeller; 6. Air cooling assembly; 61. Guide; 62. Sleeve; 63. Inner sleeve; 611. Air duct; 612. Air collecting plate; 613. Outer barrel; 614. Inner barrel; 615. Intermediate barrel; 616. Water storage chamber; 617. Support rod; 6131. ​​Drain hole; 6151. Outer baffle; 6152. Inner baffle; 6153. Top plate; 7. Support frame; 71. Upper shelf; 72. Lower shelf; 711. Ventilation opening. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To the attached Figure 4 The technical solution provided by the present invention is described in detail, but the following content is not intended to limit the present invention.

[0019] Figure 1This is a structural diagram of an embodiment of a quick cooling structure for a motor for a drone according to the present invention; Figure 2 This is a cross-sectional view of the combination of an air cooling component and a liquid cooling component according to a preferred embodiment of the present invention. Figure 1 and Figure 2 As shown, the motor in the quick cooling structure of the motor for the drone provided in this embodiment includes: a motor housing 1, a rotor 2, a stator 3 and an end cover 4. At this time, the motor housing 1 is arranged in a barrel shape. At this time, the motor housing 1 can be integrated or split, and any motor housing 1 that can form a barrel shape is sufficient. In addition, an end cover 4 is installed at the barrel mouth end of the motor housing 1, and the end cover 4 is used to protect the outside of the barrel cavity of the motor housing 1. At the same time, the rotor 2 is rotatably installed in the motor housing 1 and the two ends are rotatably installed on the barrel bottom and the end cover 4 of the motor housing 1, so that the rotor 2 can rotate stably in the barrel cavity of the motor housing 1. At the same time, the stator 3 is coaxially sleeved outside the rotor 2 and fixed to the inner wall of the motor housing 1. The rotation of the motor shaft is achieved through the cooperation of the stator 3 and the rotor 2. In addition, the quick cooling structure of the motor for the drone provided in this embodiment includes a liquid cooling component 5 and an air cooling component 6, that is, the motor is cooled simultaneously with air cooling during the liquid cooling process, and the air cooling can also assist in the liquid cooling, realizing the coupling effect of cold air and liquid cooling, improving the cooling efficiency, and making the cooling effect of the motor better. At the same time, the liquid cooling component 5 and the air cooling component 6 both act directly on the motor without an intermediate heat conduction structure, thereby effectively avoiding the problem of low cooling efficiency caused by conduction of the intermediate structure, and the cooling effect is better, which is beneficial to the performance output of the motor.

[0020] Figure 3 A structural diagram showing a combination of an air cooling component and a liquid cooling component according to a preferred embodiment of the present invention from one perspective; Figure 4 This is a structural diagram from another perspective of the combination of the air cooling component and the liquid cooling component of a preferred embodiment of the present invention. Figures 1 to 4As shown, the liquid cooling assembly 5 further includes a cooling jacket 51, a liquid cooling circulation member 52, a radiator, and a liquid cooling medium. At this time, the cooling jacket 51 is placed outside the motor housing 1, achieving direct contact between the cooling jacket 51 and the motor, thereby directly cooling the motor. At the same time, a spiral cooling groove 511 is provided on the inner wall of the cooling jacket 51, and one side of the spiral cooling groove 511 is attached to the motor housing 1, so that the subsequent liquid cooling medium can flow through the spiral cooling groove 511, thereby cooling the motor housing 1 and reducing the motor temperature. At the same time, a liquid inlet and a liquid outlet are provided on the cooling jacket 51 and are respectively connected to the two ends of the spiral cooling groove 511. The cooling circulation member is provided in the circulation pipeline between the liquid inlet and the liquid outlet, and the liquid cooling medium is filled in the spiral cooling groove 511, the cooling circulation member, and the circulation pipeline, so that the liquid cooling medium can be circulated in the spiral cooling groove 511 of the cooling jacket 51 and the corresponding circulation pipeline, and the liquid cooling circulation member 52 provides a driving force for the circulation of the liquid cooling medium. In addition, a radiator is installed in the circulation pipeline to dissipate the heat of the liquid cooling medium during the circulation process, reduce the temperature of the liquid cooling medium, and provide conditions for the subsequent liquid cooling medium to cool the motor again.

[0021] Specifically, the air cooling assembly 6 further includes a guide 61 and a sleeve 62. Sleeve 62 is placed over the cooling jacket 51, providing auxiliary cooling for the cooling jacket 51. This allows the cooling jacket 51 to not only cool the liquid cooling medium but also provide auxiliary air cooling. This achieves a coupling effect between the air cooling assembly 6 and the liquid cooling assembly 5, further improving cooling efficiency and achieving a better cooling effect. Furthermore, an inner sleeve 63 is coaxially disposed at one end of sleeve 62. At this time, one end of inner sleeve 63 is placed against the bottom of the motor housing 1, achieving installation of inner sleeve 63 on the motor housing 1. Simultaneously, an air vent 11 is provided at the bottom of the motor housing 1, communicating with inner sleeve 63. Airflow can enter the motor housing 1 through air vent 11, achieving direct air cooling of the motor's internal structure and directly affecting the motor itself, thus avoiding the problem of low cooling efficiency caused by heat transfer from intermediate structures. In addition, the guide member 61 includes an air duct 611 arranged in an "N" shape. At this time, the guide member 61 is arranged outside the sleeve 62 and below the blade. The upper end of the guide member 61 is an air inlet and is arranged toward the blade. The lower end of the guide member 61 is an air outlet and is connected to both the sleeve 62 and the inner sleeve 63. When the UAV is flying, the airflow generated by the rotation of the blade can enter the air duct 611 through the air inlet, and a part of the airflow through the air duct 611 is guided into the sleeve 62, and the other part is guided into the inner sleeve 63. The airflow in the sleeve 62 realizes auxiliary air cooling of the cooling jacket 51 in the liquid cooling assembly 5, and the airflow in the inner sleeve 63 realizes direct air cooling of the internal structure of the motor, thereby improving the cooling efficiency and meeting the rapid cooling requirements. In addition, the "N"-shaped air duct 611 can realize multi-structure flow channel conduction within a smaller height range, improve the compactness of the structure, and facilitate the structural design of the UAV.

[0022] More specifically, the liquid cooling circulation component 52 further includes a liquid pump 521 and an impeller 522. In this case, the liquid pump 521 is positioned at the bottom of the motor, and the impeller 522 is mounted on the pump shaft of the liquid pump 521, so that the impeller 522 can drive the liquid pump 521. Furthermore, the impeller 522 is positioned at the end of the sleeve 62 facing away from the connecting guide 61, so that the airflow from the sleeve 62 can directly act on the impeller 522, thereby driving the impeller 522 to rotate and realize the drive of the liquid pump 521. This allows the circulating driving force of the liquid cooling medium in the liquid cooling component 5 to fully utilize the air cooling component 6, eliminating the need for a separate drive structure and achieving greater energy efficiency.

[0023] More specifically, the radiator of the liquid cooling assembly 5 includes a plurality of fins. In this case, each of these fins is mounted on the drone's arm, and the circulation line of the liquid cooling assembly 5 passes through each fin in sequence. This allows the liquid cooling medium flowing through the circulation line to quickly dissipate heat through the fins. Furthermore, because the fins are located on the drone's arm, they are also exposed to the airflow generated by the propellers, enhancing the fins' heat dissipation and further improving energy savings.

[0024] More specifically, the guide member 61 of the air-cooling assembly 6 further includes an air collecting plate 612. In this case, the air collecting plate 612 is configured as a funnel structure, with the large end of the air collecting plate 612 facing the propeller blades. Simultaneously, the small end of the air collecting plate 612 is connected to the air inlet of the air duct 611. The air collecting plate 612 collects more airflow, allowing more airflow to enter the air duct 611 at a faster rate, thereby improving the cooling effect. Preferably, the air collecting plate 612 is sleeved outside the motor shaft, ensuring that all parts of the propeller blades are equally affected by the air collecting plate 612. This minimizes the impact on the operation of the drone when collecting the airflow generated by the propeller blades, thereby ensuring the normal operation of the aircraft.

[0025] More specifically, the guide member 61 of the air-cooling assembly 6 comprises an outer barrel 613, an inner barrel 614, an intermediate barrel 615, and a water storage chamber 616. During installation, the outer barrel 613 and inner barrel 614 are coaxially arranged, with a gap provided between them to allow airflow to pass through the gap. Furthermore, a mounting hole is provided in the bottom of the outer barrel 613, which is sleeved onto the outer sidewall of the upper end of the sleeve 62, connecting the outer barrel and the sleeve 62. Furthermore, the lower end of the inner barrel 614 is connected to the upper end of the sleeve 62, allowing airflow in the inner barrel 614 to flow directly and smoothly into the sleeve 62. In addition, the inner cylinder 614 is sleeved outside the inner sleeve 63 with a gap between them, allowing airflow to pass between the inner cylinder 614 and the inner sleeve 63, thus facilitating subsequent airflow into the sleeve 62 through the gap between the inner cylinder 614 and the inner sleeve 63. Furthermore, a height difference is created between the bottom of the outer cylinder and the upper end of the sleeve 62 in the axial direction, forming a sunken cavity between the bottom of the outer cylinder and the sleeve 62. This sunken cavity forms a water storage chamber 616. If a sudden rainstorm occurs during the flight of the drone, and a small amount of rainwater enters the air duct 611 through the air inlet, the rainwater can flow directly downward into the water storage chamber 616 under the influence of its own gravity and airflow, preventing the water from continuing along the air duct 611 and entering the motor. In addition, the intermediate cylinder 615 includes an outer baffle 6151 and an inner baffle 6152, and the outer baffle 6151 and the inner baffle 6152 are arranged in a "V" shape. At the same time, the intermediate cylinder 615 is set between the outer barrel 613 and the inner barrel 614 and is located at the upper part of the gap between the two. A gap is set between the outer baffle 6151 and the inner wall of the outer barrel 613, and a gap is set between the inner baffle 6152 and the inner barrel 614. The first vertical channel of the "N"-shaped air duct 611 is formed by the outer barrel 613 and the outer baffle 6151, and the inclined channel of the air duct 611 is formed by the inner baffle 6152 and the inner barrel 614. 63 and the inner cavity of the inner sleeve 63 itself form a second vertical channel, thereby forming an air duct 611 arranged in an "N" shape, so that even if a small amount of water from the outside enters the air duct 611 from the wind collecting disk 612 of the guide 61, the water will directly enter the water storage chamber 616 under the action of gravity, and the air flow will rise in the opposite direction through the inclined channel and then enter the sleeve 62 and the inner sleeve 63 through the second vertical channel respectively, which can not only ensure the smooth flow of the air duct 611, but also prevent a small amount of rainwater from entering the motor, and realize auxiliary cooling of the liquid cooling component 5 and air cooling of the inside of the motor, improve the cooling efficiency while achieving waterproofness, and the structural design is more reasonable.

[0026] More specifically, the air-cooling assembly 6 is also equipped with a water-absorbing and / or dehumidifying element. These elements are placed within the water storage chamber 616. The absorbent element is preferably made of a material with good water absorption, such as a sponge, while the dehumidifying element can be a calcium chloride dehumidifying bag. The presence of the absorbent element allows water entering the water storage chamber 616 to be absorbed by the absorbent element, preventing it from freely flowing within the chamber. Furthermore, the presence of the dehumidifying element allows the airflow passing through the air duct 611 to be dehumidified by the dehumidifying element, reducing the moisture content of the airflow entering the motor and thereby minimizing the impact of moisture in the air on the motor. Furthermore, the bottom of the outer barrel 613 is provided with a plurality of drainage holes 6131. ​​These drainage holes 6131 are removably fitted with plugs. By removing the plugs and opening the drainage holes 6131, the absorbent and / or dehumidifying element can be replaced through the drainage holes 6131, resulting in a more rational structural design.

[0027] More specifically, a plurality of heat conducting plates 512 are provided between the cooling jacket 51 of the liquid cooling component 5 and the sleeve 62 of the air cooling component 6. At this time, the plurality of heat conducting plates 512 are distributed in a circular array with the axis of the cooling jacket 51 as the axis center, and one side of the heat conducting plate 512 is connected to the outer wall of the cooling jacket 51, so that the heat on the cooling jacket 51 can be transferred to the heat conducting plate 512, so that the air flow in the sleeve 62 can exchange heat with the heat conducting plate 512, thereby increasing the area of ​​heat exchange between the cooling jacket 51 and the air flow, thereby improving the auxiliary cooling effect of the air cooling component 6 on the liquid cooling component 5.

[0028] More specifically, a number of support rods 617 are provided between the inner cylinder 614 and the inner sleeve 63 of the guide member 61, as well as between the inner cylinder 614 and the intermediate cylinder 615. This ensures a stable connection between the inner cylinder 614 and the inner sleeve 63, and also between the inner cylinder 614 and the intermediate cylinder 615. This ensures the structural stability of the air-cooling assembly 6 after installation and also ensures that air can pass smoothly between adjacent support rods 617. At the same time, one end of the intermediate cylinder 615 is connected to the air concentrating disk 612, thus connecting the intermediate cylinder 615 and the air concentrating disk 612 and further enhancing the structural stability of the air-cooling assembly 6.

[0029] More specifically, a support frame 7 is provided at one end of the barrel opening of the motor housing 1. The support frame 7 comprises an upper frame 71 and a lower frame 72 arranged in upper and lower layers. During installation, the upper frame 71 is sleeved onto the exterior of the motor housing 1, securing the upper frame 71 to the motor housing 1. Furthermore, a plurality of vents 711 are provided on the upper frame 71, allowing airflow from the motor interior and the sleeve 62 to pass smoothly through the upper frame 71, thereby providing conditions for subsequently driving the impeller 522 to rotate. Furthermore, the liquid pump 521 is mounted on the lower frame 72, while the impeller 522 is positioned between the upper and lower frames 71 and 72. The lower frame 72 provides a stable mounting support for the liquid pump 521 and allows airflow through the vents 711 to impact the impeller 522, thereby driving the impeller 522 to rotate and drive the liquid pump 521.

[0030] More specifically, the upper frame 71 of the support frame 7 and the sleeve 62 of the air-cooling assembly 6 are detachably connected. Preferably, the upper frame 71 and the sleeve 62 of the guide member 61 are screwed together. The lower end of the sleeve 62 is provided with a flange, and the upper frame 71 is provided with a connection hole that matches the flange. The screws are passed through the flange and threadedly connected to the connection hole of the upper frame 71, thereby achieving stable installation of the liquid-cooling assembly 5 and the air-cooling assembly 6 on the motor housing 1. It is worth noting that the sleeve 62 and the inner cylinder 614 are an integrated structure and can be directly molded, while the inner cylinder 614 and the inner sleeve 63, the inner cylinder 614 and the intermediate cylinder 615, and the outer barrel 613 and the sleeve 62 can all be connected by welding. In addition, the middle tube 615 also includes a top plate 6153, the tops of the outer baffle 6151 and the inner baffle 6152 are connected to the top plate 6153, and the top plate 6153 constitutes the bottom wall of the wind collecting disk 612. At the same time, the top plate 6153 is a sloped structure, and the center of the top plate 6153 is sleeved outside the rotating shaft of the motor and is located at the highest point. The outer edge of the top plate 6153 is located at the lowest point, so that during the air intake process, the airflow generated by the blades when the drone is flying can be collected by the wind collecting disk 612. At this time, the air can be guided by the top plate 6153 to guide the airflow to the air inlet of the air duct 611, thereby increasing the air intake volume of the air inlet.

[0031] The fast cooling structure of the motor for the drone provided in this embodiment includes a liquid cooling component 5 and an air cooling component 6; a cooling jacket 51 of the liquid cooling component 5 is provided on the motor housing 1, and direct liquid cooling of the motor is achieved through the cooling jacket 51, and a sleeve 62 of the air cooling component 6 is provided on the outer surface of the cooling jacket 51, and an inner sleeve 63 is abutted on one end of the motor housing 1 with the air outlet 11, and an inner sleeve 63 is coaxially provided on the outer surface of the inner sleeve 63 with an inner cylinder 614 connected to one end of the sleeve 62, and the "N"-shaped air duct 611 of the guide 61 in the air cooling component 6 is connected to the sleeve 62. The sleeve 62 and the inner sleeve 63 are connected, so that the airflow generated by the operation of the UAV blades can be guided to the sleeve 62 and the inner sleeve 63 through the air duct 611, and the cooling sleeve 51 and the inside of the motor are cooled respectively through the airflow in the sleeve 62 and the inner sleeve 63, which can not only realize direct air cooling of the inside of the motor, but also realize auxiliary cooling of the liquid cooling component 5, realizing the coupling effect of air cooling and liquid cooling, improving the cooling efficiency, meeting the fast cooling demand, and avoiding the problem of low cooling efficiency caused by the need to set an intermediate structure to conduct heat, which is beneficial to the performance output of the motor.

[0032] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick cooling structure for a motor for a drone, comprising a motor housing, a rotor, a stator, and an end cap. The motor housing is arranged in a barrel shape, and the end cap is installed at the barrel end of the motor housing. The rotor is rotatably installed in the motor housing and its two ends are rotatably installed on the barrel bottom of the motor housing and the end cap, respectively. The stator is coaxially sleeved outside the rotor and fixed to the inner wall of the motor housing, characterized in that: Also includes: A liquid cooling assembly, comprising a cooling jacket, a liquid cooling circulation member, a radiator, and a liquid cooling medium. The cooling jacket is sleeved over the motor housing, a spiral cooling groove is provided on the inner wall of the cooling jacket, one side of the spiral cooling groove is affixed to the motor housing, and a liquid inlet and a liquid outlet are provided on the cooling jacket and are respectively connected to the two ends of the spiral cooling groove. The cooling circulation member is provided in a circulation pipeline between the liquid inlet and the liquid outlet. The liquid cooling medium is filled in the spiral cooling groove, the cooling circulation member, and the circulation pipeline. At the same time, the radiator is also installed in the circulation pipeline. An air cooling component includes a guide and a sleeve. The sleeve is sleeved on the outside of the cooling sleeve. An inner sleeve is coaxially arranged at one end of the sleeve. One end of the inner sleeve abuts against the bottom of the barrel of the motor housing. At the same time, an air outlet connected to the inner sleeve is opened on the bottom of the barrel of the motor housing. The guide includes an air duct arranged in an "N" shape. The guide is arranged outside the sleeve. The guide is located below the blade. The upper end of the guide is an air inlet and is arranged toward the blade. The lower end of the guide is an air outlet and is connected to both the sleeve and the inner sleeve.

2. The rapid cooling structure of the motor for drone according to claim 1, characterized in that: The liquid cooling circulation component includes a liquid pump and an impeller. The liquid pump is arranged at the bottom of the motor. The impeller is installed on the pump shaft of the liquid pump. Moreover, the impeller is arranged at one end of the sleeve away from the guide member.

3. The rapid cooling structure of the motor for drone according to claim 1, characterized in that: The radiator includes a plurality of radiating fins, which are arranged on the support arm of the drone, and the circulation pipeline passes through each of the radiating fins in sequence.

4. The rapid cooling structure of the motor for a drone according to claim 1, characterized in that: The guide member further includes an air collecting plate, which is a funnel structure. The large end of the air collecting plate is arranged toward the blade, and the small end of the air collecting plate is communicated with the air inlet of the air duct.

5. The rapid cooling structure of the motor for a drone according to claim 4, characterized in that: The guide member includes an outer barrel, an inner barrel, an intermediate barrel and a water storage chamber. The outer barrel and the inner barrel are coaxially arranged, and a gap is set between the outer barrel and the inner barrel. The bottom of the outer barrel is provided with a mounting hole, and the mounting hole is sleeved on the outer side wall of the upper end of the sleeve. The lower end of the inner barrel is connected to the upper end of the sleeve. The inner barrel is sleeved outside the inner sleeve and a gap is set between the two. In addition, there is a height difference between the bottom of the outer barrel and the upper end of the sleeve in its axial direction to form the water storage chamber. The intermediate barrel includes an outer baffle and an inner baffle, and the outer baffle and the inner baffle are arranged in a "V" shape. The intermediate barrel is arranged between the outer barrel and the inner barrel and is located at the upper part of the gap between the two. There is a gap between the outer baffle and the inner wall of the outer barrel, and there is a gap between the inner baffle and the inner barrel.

6. The rapid cooling structure of the motor for a drone according to claim 5, characterized in that: It also includes a water absorbing component and / or a dehumidifying component, which are placed in the water storage cavity. The bottom of the outer barrel is also provided with a plurality of drainage holes, and plugs are removably installed in the drainage holes.

7. The rapid cooling structure of the motor for a drone according to claim 1, characterized in that: A heat conducting sheet is provided between the cooling jacket and the sleeve. The heat conducting sheets are distributed in a ring array with the axis of the cooling jacket as the axis center, and one side of the heat conducting sheet is connected to the outer wall of the cooling jacket.

8. The rapid cooling structure of the motor for a drone according to claim 5, characterized in that: A plurality of support rods are provided between the inner tube and the inner sleeve and between the inner tube and the intermediate tube. At the same time, one end of the intermediate tube is connected to the air collecting plate.

9. The rapid cooling structure of the motor for a drone according to claim 2, characterized in that: It also includes a support frame, which includes an upper frame and a lower frame distributed in upper and lower layers. The upper frame is sleeved outside the motor housing, and a plurality of ventilation holes are opened on the upper frame. The liquid pump is installed on the lower frame, and the impeller is arranged between the upper frame and the lower frame.

10. The rapid cooling structure of the motor for drone according to claim 9, characterized in that: The upper frame of the support frame and the sleeve are detachably connected.

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