Patent Publication Number: US-2022212790-A1

Title: Unmanned aerial vehicle component, arm, counterweight float, and unmanned aerial vehicle

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority to the Chinese Patent Application No. 2019104263352, filed on May 20, 2019 with the Chinese Patent Office and entitled “Unmanned Aerial Vehicle Assembly and Unmanned Aerial Vehicle”, and the Chinese Patent Application No. 2019108503815, filed on Sep. 9, 2019 with the Chinese Patent Office and entitled “Intelligent Device, Float and Unmanned Aerial Vehicle”, both of which are hereby incorporated by reference in their entirety. 
     TECHNICAL FIELD 
     The present application relates to the technical field of unmanned aerial vehicle (UAV), and specifically provides an unmanned aerial vehicle assembly, arm, float and unmanned aerial vehicle. 
     BACKGROUND 
     Most of the existing ordinary UAVs do not have the waterproof function. Even for a waterproof UAV, it is too complex in design and structure to be universal. Moreover, the heat dissipation and air connectivity of the existing waterproof UAVs have not been well solved yet, which limits the application scenarios and areas of UAVs. 
     SUMMARY OF THE INVENTION 
     This patent application is provided for the purpose of enabling an ordinary UAV to have the waterproof function while improving the heat dissipation efficiency and air connectivity of the UAV. 
     The present application provides a UAV assembly that plays a waterproof role and is configured to prevent a UAV part inside the assembly from contacting with water. The assembly comprises a first component comprising at least one opening, and a second component configured to seal the opening of the first component so as to prevent water from pouring into the assembly from the opening. 
     Alternatively, at least one first through hole is provided on the UAV assembly, via which the UAV part inside the UAV assembly is connected to an external device. 
     Alternatively, the first through hole is provided on the first component, or the first through hole is provided on the second component, or the first through hole is provided at a joint between the first component and the second component. 
     Alternatively, providing the first through hole at the joint between the first component and the second component comprises disposing one portion of the first through hole on the first component and disposing the other portion of the first through hole on the second component, such that the first through hole is formed as a whole at the joint when the second component seals the opening of the first component. 
     Alternatively, a first sealing ring is provided around the first through hole, the first sealing ring configured to prevent water from leaking at a place where the external device is in contact with the UAV assembly when the external device is connected with the UAV part via the first through hole. 
     Alternatively, a second sealing ring is provided at the joint between the second component and the first component to prevent water from penetrating into the UAV assembly from the joint. 
     Alternatively, the first component and the second component are connected together via at least one buckle configured to seal the opening of the first component. 
     Alternatively, the buckle comprises a boss and a ferrule that fixedly connects the first component and the second component together by sleeving the boss. 
     Alternatively, the ferrule is provided on the first component, and the boss is provided on the second component. 
     Alternatively, the UAV assembly further comprises a rotating part comprising a rotating column provided on the second component and a rotating groove provided on the first component; the second component in a state of connection with the first component is rotated by the rotating part relative to the first component. 
     Alternatively, the first component and/or the second component at least have one portion which is transparent. 
     Alternatively, the shape of the first component and/or the shape of the second component are oval or circular. 
     Alternatively, the UAV assembly further comprises a waterproof and breathable part; 
     The waterproof and breathable part is provided on the UAV assembly and configured to prevent water leakage and allow passage of air. 
     Alternatively, the waterproof and breathable part is a waterproof and breathable film. 
     Alternatively, parts inside the UAV assembly that need to be in contact with air are connected with the waterproof and breathable part. 
     Alternatively, the UAV assembly further comprises a heat dissipation part; 
     The heat dissipation part is provided on the UAV assembly, and configured to transmit out heat generated inside the UAV assembly. 
     Alternatively, heat generating parts inside the UAV assembly are close to or in contact with the heat dissipation part. 
     Alternatively, the heat dissipation part is made of a material with good heat conduction. 
     One embodiment of the present application further provides a UAV comprising the UAV assembly mentioned above and a UAV body comprising a fuselage body mounted inside the UAV assembly, and an arm that passes through a through hole on the UAV assembly to connect with the fuselage body. 
     Alternatively, the arm comprises a connecting end inside which a receiving cavity is formed, and a first arm body at least connected with the connecting end, the receiving cavity being waterproof by means of a waterproof part at least provided at a joint between the connecting end and the first arm body. 
     Alternatively, an electronic component is provided inside the receiving cavity. 
     Alternatively, the electronic component comprises a circuit board, and the waterproof part is also provided between a mounting surface of the circuit board and a cavity wall of the receiving cavity. 
     Alternatively, the first arm body is formed with a first channel along an axial direction thereof, and the waterproof part separates the receiving cavity from the first channel. 
     Alternatively, the waterproof part is provided with a perforation fora connecting wire to pass through, and a third sealing ring is provided between the connecting wire and a wall of the perforation. 
     Alternatively, the arm further comprises a second arm body at least connected with the connecting end, and the waterproof part is further provided at a joint between the connecting end and the second arm body. 
     Alternatively, the second arm body is formed with a second channel along an axial direction thereof, and the waterproof part separates the receiving cavity from the second channel. 
     Alternatively, the first arm body and the second arm body extend in different directions respectively. 
     Alternatively, the second arm body can be folded relative to the first arm body. 
     Alternatively, a second through hole and a third through hole are provided respectively on opposite sides of the first arm body and the second arm body which are close to the connecting end, and the connecting wire led out from the connecting end passes from the second through hole, through the third through hole, and into the channel inside the second arm body. 
     Alternatively, the arm body further comprises a first unipod and a second unipod correspondingly connected with free ends of the first arm body and the second arm body respectively. 
     Alternatively, the first unipod can be rotated and folded relative to the first arm body, and the second unipod can be rotated and folded relative to the second arm body. 
     Alternatively, the arm body further comprises a power assembly provided at the free ends of the first arm body and the second arm body. 
     Alternatively, the waterproof part is made of an elastic material. 
     Alternatively, the UAV further comprises a float connected to the arm body, the float being configured to increase buoyancy. 
     Alternatively, the float comprises a connecting piece and a float body connected with the connecting piece, and is connected onto the arm body via the connecting piece. 
     Alternatively, a hollow cavity is formed inside the float. 
     Alternatively, a plurality of grooves are provided inwards from a top surface of the float. 
     Alternatively, a perforation is provided on a bottom of the groove. 
     Alternatively, the arm comprises a connecting end inside which a receiving cavity is formed, and a first arm body at least connected with the connecting end, the receiving cavity being waterproof by means of a waterproof protective layer at least provided at a joint between the connecting end and the first arm body. 
     Alternatively, the waterproof protective layer is a waterproof glue or a waterproof film. 
     The present application further provides an arm connected to a UAV, the arm comprising a connecting end inside which a receiving cavity is formed, and a first arm body at least connected with the connecting end, the receiving cavity being waterproof by means of a waterproof part at least provided at a joint between the connecting end and the first arm body. 
     Alternatively, an electronic component is provided inside the receiving cavity. 
     Alternatively, the electronic component comprises a circuit board, and the waterproof part is also provided between a mounting surface of the circuit board and a cavity wall of the receiving cavity. 
     Alternatively, the first arm body is formed with a first channel along an axial direction thereof, and the waterproof part separates the receiving cavity from the first channel. 
     Alternatively, the waterproof part is provided with a perforation fora connecting wire to pass through, and a third sealing ring is provided between the connecting wire and a wall of the perforation. 
     Alternatively, the arm further comprises a second arm body at least connected with the connecting end, and the waterproof part is further provided at a joint between the connecting end and the second arm body. 
     Alternatively, the second arm body is formed with a second channel along an axial direction thereof, and the waterproof part separates the receiving cavity from the second channel. 
     Alternatively, the first arm body and the second arm body extend in different directions respectively. 
     Alternatively, the second arm body can be folded relative to the first arm body. 
     Alternatively, a second through hole and a third through hole are provided respectively on opposite sides of the first arm body and the second arm body which are close to the connecting end, and the connecting wire led out from the connecting end passes from the second through hole, through the third through hole, and into the channel inside the second arm body. 
     Alternatively, the arm further comprises a first unipod and a second unipod correspondingly connected with free ends of the first arm body and the second arm body respectively. 
     Alternatively, the first unipod can be rotated and folded relative to the first arm body, and the second unipod can be rotated and folded relative to the second arm body. 
     Alternatively, the arm further comprises a power assembly provided at the free ends of the first arm body and the second arm body. 
     Alternatively, the waterproof part is made of an elastic material. 
     The present application further provides an arm connected to a UAV, the arm comprising a connecting end inside which a receiving cavity is formed, and a first arm body at least connected with the connecting end, the receiving cavity being waterproof by means of a waterproof protective layer at least provided at a joint between the connecting end and the first arm body. 
     Alternatively, the waterproof protective layer is a waterproof glue or a waterproof film. 
     The present application further provides a float configured to increase buoyancy, the float comprising a connecting piece and a float body connected with the connecting piece, and is connected onto the arm as described above via the connecting piece. 
     Alternatively, a hollow cavity is formed inside the float. 
     Alternatively, a plurality of grooves are provided inwards from a top surface of the float. 
     Alternatively, a perforation is provided on a bottom of the groove. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of a UAV assembly of a first type according to one embodiment of the present application; 
         FIG. 2  is a schematic diagram of a UAV assembly of a second type according to one embodiment of the present application; 
         FIG. 3  is a schematic diagram of a UAV assembly of a third type according to one embodiment of the present application; 
         FIG. 4  is a second schematic diagram of the UAV assembly of the third type according to the embodiment of the present application; 
         FIG. 5  is a schematic diagram of the combination of the UAV assembly of the third type with a UAV according to one embodiment of the present application; 
         FIG. 6  is a second schematic diagram of the combination of the UAV assembly of the third type with the UAV according to the embodiment of the present application; 
         FIG. 7  is a third schematic diagram of the UAV assembly of the third type according to the embodiment of the present application; 
         FIG. 8  is a fourth schematic diagram of the UAV assembly of the third type according to the embodiment of the present application; 
         FIG. 9  is a schematic diagram of the UAV assembly comprising a waterproof and breathable part according to one embodiment of the present application; 
         FIG. 10  is a schematic diagram of the UAV assembly comprising a heat dissipation part according to one embodiment of the present application; 
         FIG. 11  is a schematic diagram of a UAV according to one embodiment of the present application; 
         FIG. 12  is a perspective view of an arm provided in one embodiment of the present application; 
         FIG. 13  is a bottom view of the arm of  FIG. 12 ; 
         FIG. 14  is a structural view of the interior of the connecting end of  FIG. 12 ; 
         FIG. 15  is a schematic diagram of the connection between a float and an arm provided in the present application; 
         FIG. 16  is a structural diagram of a float provided in one embodiment of the present application; and 
         FIG. 17  is a structural diagram of another UAV provided in one embodiment of the present application. 
     
    
    
     In the drawings,  100 —UAV assembly;  101 —first component;  102 —second component;  103 —opening;  104 ,  115 —waterproof ring;  105 —first through hole;  106 —fuselage body;  107 —external device;  108 —boss;  109 —ferrule;  110 —rotating column;  111 —rotating groove;  1111 —structural plate;  112 —waterproof and breathable part;  113 —heat dissipation part;  114 —arm;  900 —UAV;  911 —connecting end;  913 —first arm body;  9111 —electrical interface;  9112 —antenna interface;  9113 —data interface;  9114 —slot;  9115 —abutment member;  9116 —receiving cavity;  9101 —electronic component;  91011 —circuit board;  91012 —antenna wiring piece;  91013 —pin;  9131 —first free end;  9132 —first channel;  916 —waterproof part;  915 —second arm body;  9151 —second free end;  9133 —second through hole;  9153 —third through hole;  912 —first monopod;  914 —second monopod;  920 —float;  921 / 921 A—connecting piece;  922 / 922   a —float body;  9211   a —hook piece;  9212   a —ribbon—shaped connecting piece;  9213   a —slot hole;  9221   a —float main body;  9222   a —main body connecting part;  9223   a —transverse perforation;  9224   a —top wall;  9225   a —bottom wall;  9226   a —first longitudinal perforation;  9227   a —second longitudinal perforation;  930 —fuselage;  931 —base body;  933 —cover body;  9311 —connecting part. 
     DETAILED DESCRIPTION OF THE EMBODIMENTS OF THE INVENTION 
     Certain exemplary embodiments are described below only in a brief manner. Just as those skilled in the art will appreciate, changes in various ways to the embodiments described herein can be carried out without departing from the spirit or scope of the present application. Therefore, the drawings and the following description are deemed essentially exemplary, instead of limitative. 
     In the description of the present application, it needs to be understood that the orientation or position relations denoted by such terms as “central” “longitudinal” “latitudinal” “length” “width” “thickness” “above” “below” “front” “rear” “left” “right” “vertical” “horizontal” “top” “bottom” “inside” “outside” “clockwise” “counterclockwise” and the like are based on the orientation or position as shown in the accompanying drawings, and are used only for the purpose of facilitating description of the present application and simplification of the description, instead of indicating or suggesting that the denoted devices or elements must be specifically oriented, or configured or operated in some specific orientation. Thus, such terms should not be construed to limit the present application. In addition, such terms as “first” and “second” are only used for the purpose of description, rather than indicating or suggesting relative importance or implicitly indicating the number of the designated technical features. Accordingly, features defined with “first” or “second” may, expressly or implicitly, include one or more of such features. In the description of the present application, “plurality” means two or above, unless otherwise defined explicitly and specifically. 
     In the description of the present application, it needs to be noted that, unless otherwise specified and defined explicitly, such terms as “mount” “link” and “connect” should be understood as generic terms. For example, connection may refer to fixed connection, dismountable connection, or integrated connection; also to mechanical connection, electric connection or intercommunication; further to direct connection, or connection by an intermediary medium; or even to internal communication between two elements or interaction between two elements. For those skilled in the art, they can construe the specific meaning of such terms herein in light of specific circumstances. 
     Herein, unless otherwise specified and defined explicitly, if a first feature is “above” or “below” a second one, this may cover the direct contact between the first and second features, also cover the contact via another feature therebetween, instead of the direct contact. Furthermore, if a first feature “above”, “over” or “on the top of” a second one, this may cover that the first feature is right above or on the inclined top of the second feature, or just indicate that the first feature has a horizontal height higher than that of the second feature. If a first feature is “below”, “under” or “on the bottom of” a second feature, this may cover that the first feature is right below and on the inclined bottom of the second feature, or just indicates that the first feature has a horizontal height lower than that of the second feature. 
     The disclosure below provides many different embodiments and embodiments so as to achieve different structures described herein. In order to simplify the disclosure herein, the following gives the description of the parts and arrangements embodied in specific embodiments. Surely, they are just for the exemplary purpose, not intended to limit the present application. Besides, the present application may repeat a reference number and/or reference letter in different embodiments, and such repeat is for the purpose of simplification and clarity, which does not represent any relation among various embodiments and/or arrangements as discussed. 
     Some embodiments of the present application are described below in the accompanying drawings. It should be understood that the embodiments described herein are only for the purpose of illustrating and explaining, instead of restricting, the present application. 
     As shown in  FIG. 1 , one embodiment disclosed by the present application is a UAV assembly  100  that plays a waterproof role and is configured to prevent a UAV part inside the UAV assembly  100  from contacting with water. The UAV assembly  100  may comprise a first component  101  and a second component  102 . The first component  101  comprises at least one opening, and the second component  102  is configured to seal the opening of the first component  101  so as to prevent water from pouring into the UAV assembly  100  through the opening. 
     The first component  101  that plays a waterproof role has at least one opening, through which a UAV part can be placed into the first component  101 , and which can be sealed by the second component  102  in order to prevent water from pouring into the first component  102  through the opening. The UAV part may be a UAV as a whole or a portion of the UAV. 
     In one embodiment, there may be only one opening on the first component  101 , and the second component  102  is configured to seal the opening on the first component  101 . As shown in  FIG. 1 , by means of sealing other openings, the UAV part can enter UAV assembly  100  through the opening. 
     For example, the first component  101  may be made of an elastic material, and the second component  102  may be a waterproof zipper. Alternatively, the first component  101  may be a UAV enclosure made of the elastic material, the UAV may be put into the first component  101  through the opening on the first component  101 , and the waterproof zipper is used to seal the opening so as to playing a role in protecting the UAV. The second component  102  may also be a waterproof buckle, or the second component  102  may also be other waterproof parts that can prevent water from pouring through the opening of the first component  101 . 
     On the basis of  FIG. 1 , as shown in  FIG. 2 , there is at least one first through hole  105  on the first component  101  made of the elastic material, an external device may be connected with a UAV fuselage inside the first component  101  via the first through hole  105 . The first component  101 , due to its elastic material, closely fits with the external device at positions in contact with the external device so as to prevent water from penetrating through the positions where the external device contacts the first component  101 , such that the UAV part inside the first component  101  has the waterproof function. 
     When the UAV part in the first component  101  is a fuselage body of the UAV, the external device may be an arm of the UAV, which can form a waterproof UAV with the fuselage body of the UAV. It may be understood that in some other embodiments, the external device may also be other devices that can be connected with the fuselage body in the first component  101 , for example, a handheld support that may form a waterproof handheld camera together with the fuselage body equipped with a gimbal camera. 
     As shown in  FIGS. 3 and 4 , the present application discloses a UAV assembly  100  that plays a waterproof role and is configured to prevent a UAV part inside the UAV assembly  100  from contacting with water. The UAV assembly  100  may comprise a first component  101  and a second component  102 . The first component  101  comprises at least one opening  103 , and the second component  102  is configured to seal the opening  103  of the first component  101  so as to prevent water from pouring into the UAV assembly  100  from the opening  103 . 
     It need be noted that the UAV part may be a UAV as a whole or a portion of the UAV. 
     The first component  101  has at least one opening  103  thereon, the second component  102  may seal the opening  103  on the first component  101  to form the UAV assembly  100  as a whole, a second sealing ring may be provided at a joint between the second component  102  and the first component  101 , and may be a waterproof ring  104  in  FIG. 3  to prevent water from penetrating into the UAV assembly  100  through the joint after the second component  102  seals the opening  103  of the first component  101 , and the waterproof ring  104  may be made of an elastic material in some cases. A groove may be provided at the opening  103  of the first component  101 , through which the waterproof ring  104  may be fixed at the opening  103  of the first component  101 , or a protrusion is provided at the opening  103  of the first component  101 , on which the waterproof ring  104  may be fixed through its own groove. When the first component  101  and the second component  102  are combined, the waterproof ring  104  is squeezed by the first component  101  and the second component  102  so as to fill up a gap at the joint, such that the joint plays a waterproof role. For example, the UAV may be placed inside the UAV assembly  100  through the opening  103  on the first component  101 , thereby forming a waterproof UAV. 
     Alternatively, the UAV assembly  100  may be provided with at least one first through hole  105  through which the UAV part inside the UAV assembly  100  can be connected to the external device. The first through hole  105  may be provided on the first component  101 , or the first through hole  105  may be provided on the second component  102 , or the first through hole  105  may be provided at the joint between the first component  101  and the second component  102 . The external device may be connected with the UAV part inside the UAV assembly  100  via the first through hole  105 , and a first sealing ring may be provided around the first through hole  105 . For example, a waterproof ring  115  in  FIG. 4  may serve as the first sealing ring which can prevent water leakage occurring at a place where the external device is in contact with the vicinity of the first through hole  105 . Alternatively, the waterproof ring  115  may be made of an elastic material, a groove may be provided around the first through hole  105 , and the waterproof ring  115  may be fixed around the first through hole  105  by the groove, or a protrusion may be provided around the first through hole  105 , and the waterproof ring  115  may be fixed on the protrusion around the first through hole  105  by the groove of its own. 
     In one embodiment, when the first through hole  105  is provided at the joint between the first component  101  and the second component  102 , a portion of the first through hole  105  may be provided on the first component  101  while the other portion of the first through hole  105  may be provided on the second component  102 , and a waterproof ring may be provided around both portions of the first through hole  105 , such that a complete first through hole  105  may be formed at the joint between the first component  101  and the second component  102  after the second component  102  seals opening  103  of the first component  101 . The waterproof ring  115  around the first through hole  105  may also be divided into two portions. The waterproof ring around the first through hole  105  on the first component  101  is connected with the waterproof ring at the joint with the first component  101 , such that a complete waterproof ring  115  is formed around the first through hole  105  after the second component  102  seals the opening  103  of the first component  101 . 
     For example, as shown in  FIGS. 5 and 6 , the UAV part inside the UAV assembly  100  may be a fuselage body  106  of the UAV. The fuselage body  106  may be placed into the first component  101  via the opening on the first component  101 , the opening is then sealed by the second component  102 , and the external device  107  may be connected with fuselage body  106  of the UAV via the first through hole  105 . When the external device  107  is an arm of the UAV, a complete waterproof UAV may be formed. When the external device  107  is other devices or mechanical structures equipped with power source, a complete waterproof intelligent device may be formed. 
     As shown in  FIG. 7 , in some embodiments, the first component  101  and the second component  102  may be connected together by at least one buckle so as to seal the opening of the first component  101 . The buckle may comprise a boss  108  and a ferrule  109 . The ferrule  109  may fixedly connect the first component  101  and the second component  102  together by sleeving the boss  108 . The ferrule  109  may be provided on the second component  102 , and the boss  108  may be provided on the first component  101 . When the second component  102  is connected with the first component  101 , the ferrule  109  protrudes to sleeve onto the boss  108 , and the first component  101  and the second component  102  may be closely connected by pulling back the ferrule  109 . The function of the buckle also enables the joint between the first component  101  and the second component  102  to play a sealing role. 
     As shown in  FIG. 8 , the UAV assembly may further comprise a rotating part that may comprise a rotating column  110  and a rotating groove  111 . The rotating column  110  may be provided on the second component  102 , and the rotating groove  111  may be provided on the first component  101 . The second component  102  in a state of connection with the first component  101  may be rotated by the rotating part relative to the first component  101 . 
     The rotating groove  111  may be composed of two vertical structural plates  1111 . Screw holes may be provided on the structural plates  1111 , the rotating column  110  may be provided with screw holes corresponding to those on structural plates  1111 , and the rotating column  110  may be provided between two structural plates  1111 . The rotating groove  111  and the rotating column  110  may be connected by bolts or screws so as to ensure that the first component  101  and the second component  102  are always connected together, and the second component  102  in the state of connection with the first component  101  can be rotated by the rotating part relative to the first component  101 . 
     The rotating part may cooperate with a buckle. When the UAV assembly  100  includes one buckle and one rotating part, the second component  102  can be rotated relative to the first component  101  so as to open or seal the opening of the first component  101 . When the opening of the first component  101  is sealed, it is necessary for the rotating part to cooperate with the buckle so as to seal the opening completely. Alternatively, the number of the buckle may be more than one, and a plurality of the buckles cooperate with the rotating part to seal the opening. 
     In some embodiments, in the UAV assembly  100  as described above, at least a portion of the first component  101  and/or the second component  102  comprised therein is transparent. For example, when the UAV body is enclosed into the UAV assembly  100 , the portion of the UAV assembly  100  corresponding to a camera on the UAV may be transparent, such that the camera can normally capture images outside the UAV assembly  100 . 
     In the embodiments of the present application, the first component  101  and/or the second component  102  may be in any shape capable of enclosing the UAV part, for example, the shape of the first component and/or the shape of the second component are ellipse or circular. 
     As shown in  FIG. 9 , the UAV assembly  100  may further comprise a waterproof and breathable part  112  that may be provided on the UAV assembly  100  and can prevent water leakage and allow passage of air. Parts inside the UAV assembly  100  that need to be in contact with air are connected with the waterproof and breathable part  112  and can prevent water penetration. For example, the part that needs to be in contact with air may be a barometer of the UAV. The waterproof and breathable part  12  may be provided on the first component or the second component. In some embodiments, the waterproof and breathable part  112  may be a waterproof and breathable film. 
     For example, when the fuselage body of the UAV is enclosed into the UAV assembly  100 , the arm of the UAV may pass through the first through hole  105  to be connected with the fuselage body, and the barometer of the UAV may contact with air via the waterproof and breathable part  112  so as to acquire data, which not only ensures the waterproofness of the UAV, but also guarantees that each part of the UAV can work normally. 
     As shown in  FIG. 10 , the UAV assembly  100  may further comprise a heat dissipation part  113 . The heat dissipation part  113  may be provided on the UAV assembly  100 , which is configured to dissipate heat generated inside the UAV assembly  100 . The heat dissipation part  113  may be provided on the first component  101  or the second component  102 . The heat generating parts inside the UAV assembly  100  are close to or in contact with the heat dissipation part  113 . The heat dissipation part  113  is made of a material with good heat conduction. For example, the heat dissipation part  113  may be a waterproof shell mounted on the fuselage of the UAV, the waterproof shell including a heat dissipation area configured to dissipate the heat generated during the operation of the fuselage in time, the material of which may be metal materials such as steel, aluminum, aluminum alloy and copper. 
     Surely, it may be understood that what is described above only serve as an example, in which metal materials such as steel, aluminum, aluminum alloy and copper are used as the material of the heat dissipation area. While in other embodiments, some other materials may also be used to make the heat dissipation area, as long as they can transfer the heat outside the waterproof shell in time. 
     For example, when the fuselage body of the UAV is enclosed into the UAV assembly  100 , the arm of the UAV passes through the first through hole to be connected with the fuselage body, thereby forming a waterproof UAV. The UAV may transfer the heat generated inside the fuselage to the heat dissipation parts through a heat conduction system, and dissipate the heat through the heat dissipation part  113  of the UAV assembly, or the parts generating heat on the UAV may be directly close to or in contact with the heat dissipation part  113 . 
     As shown in  FIG. 11 , the embodiment of the present application discloses a UAV  900  comprising a UAV body and the UAV assembly  100  provided above in the embodiment of the present application, the UAV body comprising a fuselage body  106  and an arm  114 . The fuselage body  106  is installed inside the UAV assembly  100 , and the arm  114  may pass through a through hole on the UAV assembly  100  to be connected with the fuselage body  106 . For example, the arm  114  may pass through the first through hole  105  on the UAV assembly  100  to be connected with the fuselage body  106 . 
     Alternatively, by referring to  FIGS. 12 to 14 , in the UAV provided in the present application, the arm  114  may include a connecting end  911  and a first arm body  913  at least connected to the connecting end  911 . 
     The connecting end  911  is configured to be connected with the fuselage body  106  of the UAV so as to connect the arm  114  to the fuselage body  106 , thereby forming the UAV. After the connecting end  911  is connected with the fuselage body  106 , the arm  114  is fixed to the fuselage body  106 . 
     In this embodiment, the connecting end  911  may be provided with an electrical interface  9111  configured to achieve electrical connection between the arm  114  and the fuselage body  106 . In this embodiment, the electrical interface  9111  includes, but not limited to, an antenna interface  9112  and a data interface  9113 . The antenna interface  9112  is configured to be connected with a corresponding interface on the fuselage body  106  so as to transmit antenna signals. The data interface  9113  is configured to be connected with a corresponding interface on the fuselage body  106  so as to achieve data communication between the arm  114  and the fuselage body  106 . In one embodiment, the data interface  9113  may also be configured to supply power to the arm  114  via the fuselage body  106 . 
     In this embodiment, a slot  9114  may be provided on the surface of the connecting end  911 . The slot  9114  is configured to fit with a column arranged on a connecting part of the fuselage body  106  in connection with the arm  114  so as to achieve a fixed connection between the arm  114  and the fuselage body  106 . In this embodiment, the slot  9114  may be provided on the outer side wall of the connecting end  911 . 
     It may be understood that the column may also be arranged on the surface of the connecting end  911 , while the slot is provided on the connecting part of the fuselage body  106 . Then the slot fits with the column to achieve the fixed connection between the connecting end  911  and the fuselage body  106 , further enabling the fixed connection between the arm  114  and the fuselage body  106 . In addition, the slot or column of the connecting end  911  may also be arranged at other positions of the connecting end  911 . For example, when the connecting end  911  is cuboid, the slot or the column may also be provided on the top or bottom surface of the connecting end  911 . 
     In this embodiment, an abutment member  9115  may be provided annularly on the outer surface of the connecting end  911  close to the first arm body  913 . The abutment member  9115  is configured to abut against the outer side wall of the fuselage body  106  when the fuselage body  106  is connected with the connecting end  911  to form a UAV, thereby preventing liquid from penetrating into the fuselage body  106  or the arm  114  from the position where the arm  114  are connected with the fuselage body  106 . 
     A receiving cavity  9116  may be formed inside the connecting end  911 . The receiving cavity  9116  is configured to receive an electronic component  9101 . In this embodiment, the electronic component  9101  includes, but not limited to, a circuit board  91011 , an antenna wiring piece  91012 , and a pin  91013  leading out from the circuit board  91011 . The position of the antenna wiring piece  91012  may correspond to that of the antenna interface  9112  and be exposed from the antenna interface  9112 . The position of the pin  91013  may correspond to that of the data interface  9113  and be exposed from the data interface  9113 . The interior of the receiving cavity  9116  may be waterproof by means of a waterproof part  916  capable of preventing liquid from penetrating into the receiving cavity  9116 , further guaranteeing the normal operation of the arm  114 . 
     It should be noted that the waterproof part  916  used above for waterproofness is only exemplary. In other embodiments of the present application, waterproofness may also be achieved in the form of, for example, a waterproof protective layer, such as a waterproof glue or a waterproof film provided at the joint between the connecting end  911  and the first arm body  913  for waterproofness. 
     The first arm body  913  is connected with the connecting end  911 . The first arm body  913  and the connecting end  911  may be in fixed connection or rotatable connection. In this embodiment, the first arm body  913  is fixedly connected with the connecting end  911 . 
     The first arm body  913  may include a first free end  9131  away from the connecting end  911 . The first free end  9131  is configured to arrange a functional component (not shown). The functional component includes, but not limited to, an antenna component, a power assembly, etc. The antenna component is configured to transmit and receive signals. The power assembly is configured to provide power for navigation of a UAV formed after the arm  114  are connected with the fuselage body  106 . In one embodiment, the power assembly may include a motor and a propeller connected to the motor. A first channel  9132  may be provided inside the first arm body  913  along its axial direction. The first channel  9132  is configured to be passed through by a connecting wire. The connecting wire may enable the electrical connection between the functional component and electronic component  9101  in the receiving cavity  9116 . 
     The waterproof part  916  may be arranged at the joint between the connecting end  911  and the first arm body  913 . In this embodiment, the waterproof part  916  may separate the receiving cavity  9116  from the first channel  9132 . 
     In one embodiment, the waterproof part  916  provided at the joint between the connecting end  911  and the first arm body  913  may be made of an elastic material. The waterproof part  916  may separate the receiving cavity  9116  from the first channel  9132  by means of elastic squeeze by a cavity wall of the receiving cavity  9116  or a side wall of the first channel  9132 , so as to prevent liquid from penetrating into the receiving cavity  9116  via the first channel  9132 . The connecting wire may pass through an edge of the waterproof part  916  to penetrate the first channel  9132  from the receiving cavity  9116 . Since the waterproof part  916  is made of an elastic material, the problem regarding liquid penetration into the receiving cavity  9116  caused by the arrangement of the connecting wire may be avoided while the connecting wire is pressed onto the cavity wall of the receiving cavity  9116  or the side wall of the first channel  9132 . 
     In one embodiment, there is no limitation of the material of the waterproof part  916  arranged at the joint between the connecting end  911  and the first arm body  913 . The waterproof part  916  may separate the receiving cavity  9116  from the first channel  9132 , by means of blocking a cavity opening of the receiving cavity  9116  close to the first channel  9132  or a channel opening of the first channel  9132  close to the receiving cavity  9116 . In this case, the waterproof part  916  may be provided with a perforation for the connecting wire to pass through, such that the connecting wire goes into the first channel  9132  from the receiving cavity  9116 . In order to achieve waterproofness, a third sealing ring (not shown) may be arranged between a wall of the perforation and the connecting wire. 
     In this embodiment, the waterproof part  916  is also provided between a mounting surface of the circuit board  91011  and the cavity wall of the receiving cavity  9116 . The waterproof part  916  is arranged between the mounting surface of the circuit board  91011  and the cavity wall of the receiving cavity  9116 , so as to prevent liquid from penetrating into the circuit board  91011 , further ensuring the normal operation of the circuit board  91011 . 
     It may be understood that the waterproof part  916  may also be arranged at a position inside the receiving cavity  9116  corresponding to the antenna interface  9112  and the data interface  9113  so as to prevent liquid from penetrating into the receiving cavity  9116  from the antenna interface  9112  or the data interface  9113 . 
     In this embodiment, the arm  114  may also include a second arm body  915  at least connected to the connecting end  911 . The second arm body  915  and the first arm body  913  extend in different directions respectively. 
     The second arm body  915  and the connecting end  911  may be in fixed connection or rotatable connection. In this embodiment, the second arm body  915  is rotatably connected with the connecting end  911 . For example, the second arm body  915  is pivotally connected with the connecting end  911 . The second arm body  915  can be folded relative to the first arm body  913  so as to facilitate the storage of the arm  114 . 
     The second arm body  915  may include the second free end  9151  away from the connecting end  911 . The second free end  9151  is configured to arrange a functional component (not shown). The functional component includes but is not limited to an antenna component, a power assembly, etc. The antenna component may transmit and receive signals. The power assembly may provide navigation power for a UAV formed after the arm  114  is connected with the fuselage body  106 . In one embodiment, the power assembly includes a motor and a propeller connected with the motor. A second channel (not shown) may be provided inside the second arm body  915  along its axial direction. The second channel is configured to be passed through by the connecting wire. The connecting wire can enable the electrical connection between the functional component and the electronic component  9101  in the receiving cavity  9116 . In this embodiment, the second channel may terminate at an end of the second arm body  915  connected with the connecting end  911 , that is, the second channel does not pass through the end of the second arm body  915  connected with the connecting end  911 . 
     In this embodiment, a second through hole  9133  and a third through hole  9153  may be provided respectively on opposite sides of the first arm body  913  and the second arm body  915  which are close to the connecting end  911 . The connecting wire connected with electronic component  9101  may enter into the first channel  9132  from the receiving cavity  9116 , next through second through hole  9133  and third through hole  9153  in turn, and then into the second channel so as to connect electronic component  9101  inside the receiving cavity  9116  with the functional component arranged at the second free end  9151  of the second arm body  915 . 
     It may be understood that the connecting wire connecting electronic component  9101  with the functional component arranged at the first free end  9131  of the first arm body  913 , and the connecting wire connecting electronic component  9101  with the functional component arranged at the second free end  9151  of the second arm body  915  are connecting wires as arranged separately. 
     In one embodiment, the second arm body  915  may be in fixed connection with the connecting end  911 , and the second channel is in communication with the receiving cavity  9116 . The waterproof part  916  is also arranged at the joint between the connecting end  911  and the second arm body  915 . The waterproof part  916  separates the receiving cavity  9116  from the second channel. In one embodiment, the waterproof part  916  arranged at the joint between the connecting end  911  and the second arm body  915  may be made of an elastic material. The waterproof part  916  may separate the receiving cavity  9116  from the second channel by means of elastic squeeze by the cavity wall of the receiving cavity  9116  or a side wall of the second channel, so as to prevent liquid from penetrating into the receiving cavity  9116  via the second channel. The connecting wire may pass through an edge of the waterproof part  916  to go into the second channel from the receiving cavity  9116 . Since the waterproof part  916  is made of an elastic material, the problem regarding liquid infiltration into the receiving cavity  9116  caused by the arrangement of the connecting wire may be avoided while the connecting wire is pressed onto the cavity wall of the receiving cavity  9116  or the side wall of the second channel. In one embodiment, there is no limitation of the material of the waterproof part  916  arranged at the joint between the connecting end  911  and the second arm body  915 . The waterproof part  916  may separate the receiving cavity  9116  from the second channel by means of blocking the cavity opening of the receiving cavity  9116  close to the second channel or a channel opening of the second channel close to the receiving cavity  9116 . In this case, the the waterproof part  916  is provided with a perforation for the connecting wire to pass through, such that the connecting wire goes into the second channel from the receiving cavity  9116 . In order to achieve waterproofness, a third sealing ring (not shown) is arranged between a wall of the perforation and the connecting wire. 
     In this embodiment, the arm  114  may also include a first unipod  912  and a second unipod  914 . The first unipod  912  and the second unipod  914  may be connected to the free ends of the first arm body  913  and the second arm body  915 , respectively. The first unipod  912  and the second unipod  914  are used to facilitate the smooth landing of a UAV formed after the arm  114  is connected with the fuselage body  106 . 
     In one embodiment, the first unipod  912  and the second unipod  914  may be fixedly connected with free ends of the first arm body  913  and the second arm body  915 , respectively. 
     In one embodiment, the first unipod  912  and the second unipod  914  may be rotatably connected with the first arm body  913  and the second arm body  915 , respectively. The first unipod  912  can be rotated and folded relative to the first arm body  913 , and the second unipod  914  can be rotated and folded relative to the second arm body  915  so as to facilitate the storage of the arm  114 . In one embodiment, the rotation and folding of the unipod relative to the arm bodies may be conducted manually by a user. In one embodiment, the arm  114  may also include driving structures for driving the unipods to rotate (e.g., a first driving structure corresponding to the first unipod  912  and a second driving structure corresponding to the second unipod  914 ). The driving structures may be respectively arranged in the corresponding channels and connected with electronic component  9101  in the receiving cavity  9116  through a connecting wire. The rotation and folding of unipods relative to the arm bodies can be achieved by the corresponding driving structures. 
     The arm provided by the present application, when equipped with a waterproof part, avoids liquid penetrating into the connecting end, which helps to ensure the normal operation of the arm. 
     Alternatively, the UAV  900  may further comprise a float  920  connected to the arm  114  and configured to increase the buoyancy of the UAV and prevent the UAV  900  from sinking into water when the UAV  900  lands on the surface of water. 
     Alternatively, referring to  FIG. 15 , the float  920  may be selectively connected to the arm  114 . The float  920  is configured to increase the buoyancy of the UAV and prevent the UAV from sinking into water when the UAV formed by the connection between the fuselage body  106  and the arm  114  lands on the surface of water. In this embodiment, the float  920  may be connected to the first arm body  913  and/or the second arm body  915  of the arm  114 . The float  920  may include a connecting piece  921  configured to be connected to the arm body and a float body  922  connected with the connecting piece  921 . Exemplarily, the connecting piece  921  may be a U-shaped hanging piece having both ends that can be connected with the float body  922 . Prior to mounting of the functional component at the free end of the arm  114 , the arm body of the arm  114  may go into the U-shaped hanging piece so as to connect the float  920  to the arm  114 . The float body  922  may be made of a material having a density less than water (e.g., polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc.). In order to increase the buoyancy and reduce the load when the UAV navigates, in one embodiment, a hollow cavity may be formed inside the float body  922 , or a plurality of grooves may be set inwards from a top surface of the float body  922 . 
     In order to prevent water pouring back into the groove when the UAV descends and lands onto the surface of water, thereby affecting the floating-aid performance of the float  920 , a perforation can be provided on the bottom of the groove to facilitate the discharge of the water accumulated in the groove. Referring to  FIG. 16 , in another embodiment, the float  920   a  may include a connecting piece  921   a  and a float body  922   a . The connecting piece  921   a  connects the float body  922   a  to the first arm body  913  and/or the second arm body  915  of the arm  114 . The connecting piece  921   a  may include a hook piece  9211   a  and a ribbon-shaped connecting piece  9212   a . The hook piece  9211   a  is configured to be connected to the first arm body  913  and/or the second arm body  915  of the arm  114 . One end of the ribbon-shaped connecting piece  9212   a  may be connected with the hook piece  9211   a , and the other end of the ribbon-shaped connecting piece  9212   a  may be connected with the float body  922   a.    
     In this embodiment, the hook piece  9211   a  is substantially U-shaped, and the U-shaped opening of the hook piece  9211   a  has a width less than diameters of the first arm body  913  and the second arm body  915 . The hook piece  9211   a  may be sleeved on the first arm body  913  and/or the second arm body  915  from the free end before the functional component is mounted on the free end of the arm  114 . Or the hook piece  9211   a  may have a certain elasticity, and the width of its U-shaped opening may be widened under the action of external force and return to the original opening width after the external force disappears. Accordingly, the hook piece  9211   a  may be hung on the first arm body  913  and/or the second arm body  915  at any time as needed, without being restricted by whether the functional component has been mounted at the free end of the arm  114 . 
     In this embodiment, both ends of the U-shaped hook piece  9211   a  may be provided with slot holes  9213   a  respectively. The slot holes  9213   a  are configured to be passed through by the ribbon-shaped connecting piece  9212   a  so as to connect the ribbon-shaped connecting piece  9212   a  with the hook piece  9211   a . In this embodiment, the ribbon-shaped connecting piece  9212   a  may pass through the slot hole  9213   a  at one end of the hook piece  9211   a  from the U-shaped opening of the hook piece  9211   a , then stick with a surface of the hook piece  9211   a  away from the opening thereof, further extend to the slot hole  9213   a  at the other end of the hook piece  9211   a , and subsequently pass through the slot hole  9213   a  at the other end of the hook piece  9211   a  and go out from the U-shaped opening. Fixed connection of the ribbon-shaped connecting piece  9212   a  with the hook piece  9211   a  may be enabled by the friction force between the ribbon-shaped connecting piece  9212   a  and the surface of the hook piece  9211   a , and the binding force of the slot hole  9213   a  onto the ribbon-shaped connecting piece  9212   a.    
     In this embodiment, the float body  922   a  comprises a float main body  9221   a  and a main body connecting part  9222   a  provided on a top surface of the float main body  9221   a  and protruding therefrom. The ribbon-shaped connecting piece  9212   a  may be connected with main body connecting part  9222   a . The main body connecting part  9222   a  may be provided with a transverse perforation  9223   a  that may include a top wall  9224   a  and a bottom wall  9225   a . The top wall  9224   a  may be provided with a first longitudinal perforation  9226   a , and the bottom wall  9225   a  may be provided with a second longitudinal perforation  9227   a . The other end of the ribbon-shaped connecting piece  9212   a  may go from the first longitudinal perforation  9226   a  into the transverse perforation  9223   a , then go out of the transverse perforation  9223   a  from the second longitudinal perforation  9227   a , next go from an opening at one end of the transverse perforation  9223   a  into the transverse perforation  9223   a , and go out of the transverse perforation  9223   a  from the first longitudinal perforation  9226   a . By the binding force of the first longitudinal perforation  9226   a , the second longitudinal perforation  9227   a  and the transverse perforation  9223   a  onto the ribbon-shaped connecting piece  9212   a , the other end of the ribbon-shaped connecting piece  9212   a  may be fixedly connected with the main body connecting part  9222   a.    
     In this embodiment, the float body  922   a  is substantially cuboid, and two main body connecting parts  9222   a  are arranged on one float body  922   a . The two main body connecting parts  9222   a  may be located at two opposite ends of the float body  922   a  respectively. The number of the ribbon-shaped connecting pieces  9212   a  and the hook pieces  9211   a  may correspond to the number of the main body connecting parts  9222   a , respectively. 
     Referring to  FIG. 17 , based on the same inventive concept, the present application further provides a UAV  900 , comprising a fuselage  930  and the arm  114  as described above. The fuselage  930  is connected to the arm  114 . The fuselage  930  includes a base body  931  and a cover body  933  buckled with the base body  931 . The base body  931  is buckled with the cover body  933  so as to fasten the connecting end  911  of the arm to the interior of the fuselage  930 . After the fuselage  930  is connected with the connecting end  911 , the abutment member  9115  abuts against an outer wall of the fuselage  930  to prevent liquid from penetrating into the arm  114  or into the fuselage  930  from the joint between the arm and the fuselage  930 . The base body  931  includes a connecting part  9311  configured to be connected to the connecting end  911 . The connecting part  9311  may be provided with an interface (not shown) corresponding to the electrical interface  9111  of the connecting end  911  so as to enable the electrical connection between the fuselage  930  and the arm  114 . The connecting part  9311  may also be provided with a column (not shown) connected with the slot  9114  of the connecting end  911  so as to enable the fixed connection between the fuselage  930  and the arm  114 . 
     Last but not least, it should be noted that the contents described above are just some embodiments of the present application, and are not used to limit the present application. Although the detailed description of the present application has been provided with reference to the foregoing embodiments, those skilled in the art still may make modifications to the technical solutions recorded in various embodiments described above, or conduct equivalent replacement of some technical features therein. Any modification, equivalent replacement, or improvement, if only falling into the spirit and principles as stated herein, should be included in the protection scope of the present application. 
     INDUSTRIAL PRACTICABILITY 
     The UAV body and the UAV assembly together form a waterproof UAV, thereby making the UAV have the function of taking off and landing on water. 
     Moreover, the waterproof and breathable part and/or the heat dissipation part are added to the UAV assembly, thereby enabling all components inside the UAV to operate normally, and solving the problem regarding poor heat dissipation of a waterproof UAV as caused by airtightness. 
     Moreover, ordinary UAVs would also have the waterproof function after being modified according to the technical solutions of the embodiments of the present application, thereby solving the problems regarding poor heat dissipation and poor air connectivity in waterproof UAVs, and expanding the application scenarios of the ordinary UAVs. 
     Moreover, the arm provided by the present application is equipped with a waterproof part, this prevents liquid from penetrating into the connecting end and further helps to guarantee the normal operation of the arm.