Lifting structure, drone platform and vehicle

Abstract

The application relates to a lifting structure, a UAV platform and a vehicle. The lifting structure comprises two groups of crosspieces arranged oppositely, each group of crosspieces is arranged on a corresponding side of a lifting platform and is used for driving the lifting platform to lift, each group of crosspieces comprises at least two connecting rods hinged to each other, and the cross section area of the hinged position of at least one connecting rod is larger than that of the position of the adjacent connecting rod, so that the overall bearing capacity and the strength of the crosspiece are improved, and the crosspiece can bear a larger apron, a UAV and the like in size and weight.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle-mounted unmanned aerial vehicle, and in particular to a lifting structure, an unmanned aerial vehicle platform and a vehicle. BACKGROUND

[0002] In recent years, the unmanned aerial vehicle industry has developed rapidly. As an inevitable product of technological development, vehicle-mounted unmanned aerial vehicles have a more and more extensive application market. An unmanned aerial vehicle platform, as a take-off and landing platform for unmanned aerial vehicles, can be arranged on a vehicle, a ship or a building wall. The unmanned aerial vehicle platform generally comprises a lifting structure for lifting the platform, which is generally composed of two fork arms, and has a simple structure and is conducive to production and manufacturing.

[0003] Since the lifting structure needs to carry the landing apron and the unmanned aerial vehicle, and also needs to lift the unmanned aerial vehicle, the strength and load-bearing capacity of the lifting structure are important indicators for testing whether the quality of the lifting structure is qualified. Although the traditional lifting structure has a simple structure and is conducive to production and manufacturing, as the size and weight of the unmanned aerial vehicle, the landing apron and the like gradually increase, the load-bearing and strength requirements for the lifting structure are gradually increased. When the traditional lifting structure carries a large-size unmanned aerial vehicle and landing apron, the lifting structure may not be able to lift, or even be damaged under no load. SUMMARY

[0004] The embodiments of the present application provide a lifting structure, an unmanned aerial vehicle platform and a vehicle, which improve the strength and load-bearing capacity of the lifting structure to at least partially solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a lifting structure is provided, which comprises two groups of cross members arranged oppositely, each group of cross members is arranged on a corresponding side of a lifting platform, and is used to drive the lifting platform to lift.

[0006] Each group of cross members comprises at least two connecting rods hingedly connected to each other, and the cross-sectional area of the hinged part of at least one connecting rod is greater than the cross-sectional area of the part adjacent to the hinged part.

[0007] Optionally, the cross-sectional area of the hinged part of the connecting rod is greater than the cross-sectional area of the two ends of the connecting rod.

[0008] Optionally, the sum of the cross-sectional areas of the hinged parts of the two connecting rods in each group of cross members is greater than the sum of the cross-sectional areas of the ends of the two connecting rods.

[0009] Optionally, the thickness of the end of one connecting rod in each group of cross members is greater than the thickness of the end of the other connecting rod; and / or the thickness of the hinged part of one connecting rod in each group of cross members is greater than the thickness of the hinged part of the other connecting rod.

[0010] Optionally, each of the cross members comprises two of the connecting rods, the two connecting rods have different thicknesses, and the connecting rod with smaller thickness is located between the other connecting rod and the lifting platform.

[0011] Optionally, the connecting rod further comprises a first segment and a second segment, the first segment is connected with the second segment to form a hinge site for the two connecting rods to be connected.

[0012] Optionally, the first segment and the second segment form a first included angle, so that the end point of the first segment away from the hinge site, the end point of the second segment away from the hinge site, and the point where the hinge site is connected form a triangle.

[0013] Optionally, the connecting rod further comprises a third segment, the first segment is adapted to be hinged with the base of the UAV platform or the driving mechanism of the UAV platform, and the third segment is connected with the second segment and forms a second included angle.

[0014] Optionally, the second included angle is greater than 90°.

[0015] Optionally, the surface where the third segment is connected with the first segment is an arc surface, or the surface where the third segment is connected with the second segment is an arc surface.

[0016] Optionally, the connecting rod is provided with a guide rod adapted to guide the UAV to land and fold the rotor of the UAV.

[0017] Optionally, when the UAV lands on the lifting platform, the height of the end of the guide rod away from the connecting rod is higher than the height of the rotor of the UAV.

[0018] Optionally, the height difference between the height of the end of the guide rod away from the connecting rod and the height of the rotor of the UAV when the UAV lands on the lifting platform is 2-3 cm.

[0019] Optionally, the end of the guide rod away from the connecting rod is provided with a guide surface.

[0020] Optionally, the hinge site of at least one of the two groups of cross members is recessed towards the direction away from the lifting platform to form an avoiding site.

[0021] Optionally, the lifting structure further comprises a reinforcing rod connected between the two groups of cross members.

[0022] Optionally, the reinforcing rod is connected with the connecting rod closer to the lifting platform in the two groups of cross members.

[0023] Optionally, the cross section area of the part where the reinforcing rod is connected with the connecting rod is larger than the cross section area of the part of the connecting rod adjacent to it.

[0024] Optionally, the surface of the cross member is provided with a plurality of reinforcing ribs.

[0025] According to a second aspect of the present application, a UAV platform is provided, comprising:

[0026] a base;

[0027] a lifting platform arranged opposite to the base;

[0028] a lifting structure as described in the first aspect, rotationally connecting the base and the lifting platform; and

[0029] a driving mechanism drivingly connected with the lifting structure to drive the lifting platform to lift or lower.

[0030] Optionally, the cross member comprises at least two connecting rods, the hinge parts of the two connecting rods are rotationally connected with each other, and the two ends of at least one connecting rod are respectively rotationally connected with one end of the lifting platform in the second direction and the driving mechanism, and the two ends of the other connecting rod are respectively rotationally connected with one end of the base away from the driving mechanism and the other end of the lifting platform in the second direction, so that the two connecting rods can cross-rotate to change the distance between the lifting platform and the base.

[0031] Optionally, the driving mechanism comprises a power source and a transmission assembly, the output end of the power source is connected with the transmission assembly to transmit the output power of the power source to the transmission assembly, so that the transmission assembly can translate relative to the base, and the two sides of the transmission assembly are respectively rotationally connected with one connecting rod of each of the cross members to drive the two connecting rods of the cross members to cross-rotate.

[0032] Optionally, the lifting platform is slidably provided with a driven assembly on one side close to the driving mechanism, and one end of one connecting rod of each of the cross members away from the base is rotationally connected with the driven assembly, so that the driven assembly can slide on the lifting platform with the movement of the lifting structure.

[0033] Optionally, the driving mechanism further comprises an elastic member, the two ends of the elastic member are respectively connected with the base and the transmission assembly, and the movement of the transmission assembly can change the deformation amount of the elastic member.

[0034] Optionally, the UAV platform has a lifting state and a landing state, and the lifting state has at least one of the following characteristics compared with the landing state:

[0035] The distance between the transmission component and the power source is greater;

[0036] The elastic element has a smaller degree of deformation;

[0037] The angle of the intersection formed by the two connecting rods facing the base is smaller.

[0038] According to a third aspect of this application, a vehicle is also provided, including an unmanned aerial vehicle platform as described in the second aspect.

[0039] In the lifting structure of this application embodiment, by setting the cross-sectional area of ​​the hinge portion of the connecting rod to be larger than the cross-sectional area of ​​its adjacent connecting rod portion, the overall load-bearing capacity and self-strength of the cross member are improved, enabling it to support helipads, drones, and other equipment with large dimensions and weights. Specifically, the lifting structure consists of two sets of cross members, maintaining the advantage of structural simplicity. Then, the hinge portion of the connecting rod in the cross member is specifically reinforced to specifically improve the load-bearing capacity and self-strength of the cross member, overcoming the problem that the parts used for cross-rotation are more prone to damage due to excessive load compared to other parts.

[0040] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0043] Figure 1 This is a schematic diagram of the structure of a drone platform carrying a drone and in a lifted state, provided in an exemplary embodiment of this disclosure;

[0044] Figure 2 This is a schematic diagram of the structure of a drone platform carrying a drone and in a landing state, provided in an exemplary embodiment of this disclosure;

[0045] Figure 3 This is a schematic diagram of a drone platform in a lifted state provided in an exemplary embodiment of this disclosure;

[0046] Figure 4is a structural schematic diagram of a first perspective of a lifting structure in a lifting state according to an example embodiment of the present disclosure;

[0047] Figure 5 is a structural schematic diagram of a first perspective of a lifting structure in a landing state according to an example embodiment of the present disclosure;

[0048] Figure 6 is a structural schematic diagram of a second perspective of a lifting structure according to an example embodiment of the present disclosure;

[0049] Figure 7 is a structural schematic diagram of a second perspective of a crosspiece in a lifting structure according to an example embodiment of the present disclosure;

[0050] Figure 8 is a structural schematic diagram of a second perspective of another crosspiece in a lifting structure according to an example embodiment of the present disclosure;

[0051] Figure 9 is a structural schematic diagram of a first perspective of a connecting rod in a lifting structure according to an example embodiment of the present disclosure;

[0052] Figure 10 is a structural schematic diagram of a first perspective of another connecting rod in a lifting structure according to an example embodiment of the present disclosure;

[0053] Figure 11 is a simulation diagram of a lifting structure in a vibration state according to an example embodiment of the present disclosure;

[0054] Figure 12 is a simulation diagram of a lifting structure at rest in different working conditions according to an example embodiment of the present disclosure;

[0055] Figure 13 is a vibration fatigue simulation diagram of a lifting structure according to an example embodiment of the present disclosure.

[0056] Explanation of reference signs:

[0057] 1, lifting structure; 11, crosspiece; 111, connecting rod; 112, guide rod; 113, avoiding position; 114, reinforcing rib; 115, first section; 116, second section; 117, hinged position; 118, third section; 12, reinforcing rod;

[0058] 2, base;

[0059] 3, lifting platform; 31, driven assembly;

[0060] 4, driving mechanism; 41, power source; 42, transmission assembly; 43, elastic member;

[0061] 5, unmanned aerial vehicle; 51, rotor;

[0062] α1, first included angle; α2, second included angle; α3, intersection angle;

[0063] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the protection scope of the present application.

[0065] In the description of subsequent embodiments, the term "connected" or the term "connected" appearing should be understood as direct connection or indirect connection, and can also be integrally formed.

[0066] Please refer to Figures 1 to 3 The embodiments of the present application provide an unmanned aerial vehicle platform, which can be an unmanned aerial vehicle platform for a vehicle-mounted unmanned aerial vehicle, or an unmanned aerial vehicle platform used by an unmanned aerial vehicle 5 in other fields, which is not limited here. The unmanned aerial vehicle platform comprises a base 2, a lifting platform 3, a lifting structure 1 and a driving mechanism 4. Wherein, the lifting platform 3 is arranged opposite to the base 2, the lifting structure 1 is rotatably connected to the base 2 and the lifting platform 3, so that the lifting structure 1 can change the distance between the lifting platform 3 and the base 2, that is, drive the lifting platform 3 to lift. Further, the driving mechanism 4 is drivingly connected to the lifting structure 1, providing power for the movement of the lifting structure 1, so that the lifting structure 1 can drive the lifting platform 3 to lift cooperatively.

[0067] In some embodiments, the lifting structure 1 comprises two groups of crosspieces 11 arranged opposite to each other, each group of crosspieces 11 is arranged on a corresponding side of the lifting platform 3, for driving the lifting platform 3 to lift. Here, the corresponding side means that the two groups of crosspieces 11 are arranged on different sides of the lifting platform 3. Exemplarily, the lifting platform 3 is rectangular, then the crosspieces 11 can be arranged on two of the four sides of the lifting platform 3. In this embodiment, the two groups of crosspieces 11 are arranged on opposite sides of the lifting platform 3, so that the crosspieces 11 are arranged opposite to each other, which is beneficial to improve the stability of the lifting platform 3 during lifting. Wherein, each group of crosspieces 11 comprises at least two connecting rods 111 hingedly connected to each other, and the cross section area of the hinged part of at least one connecting rod 111 is greater than that of the adjacent connecting rod part, so that the overall load bearing capacity and the strength of the crosspiece 11 are improved, which can bear the size and weight of the larger parking apron, unmanned aerial vehicle 5 and the like.

[0068] It is to be noted that there are three cases in which the cross-sectional area of the hinged portion of a connecting rod 111 is larger than that of the connecting rod portion adjacent thereto. First, the width of the hinged portion of a connecting rod 111 in the height direction is larger than that of the connecting rod portion adjacent thereto in the height direction, so that the cross-sectional area of the hinged portion is larger than that of the connecting rod portion adjacent thereto. Second, the thickness of the hinged portion of a connecting rod 111 in the thickness direction, i.e., the first direction X, is larger than that of the connecting rod portion adjacent thereto in the thickness direction, so that the cross-sectional area of the hinged portion is larger than that of the connecting rod portion adjacent thereto. Third, the width of the hinged portion of a connecting rod 111 in the height direction is larger than that of the connecting rod portion adjacent thereto in the height direction, and the thickness of the hinged portion in the thickness direction, i.e., the first direction X, is larger than that of the connecting rod portion adjacent thereto in the thickness direction, so that the cross-sectional area of the hinged portion is larger than that of the connecting rod portion adjacent thereto.

[0069] In some embodiments, referring to Figure 4 , two sets of cross members 11 are respectively arranged on opposite sides of the lifting platform 3 along the first direction X. The cross member 11 includes at least two connecting rods 111. The hinged portions 117 of the two connecting rods 111 are rotationally connected to each other, and one end of at least one connecting rod 111 is rotationally connected to one end of the lifting platform 3 along the second direction Y, and the other end is rotationally connected to the driving mechanism 4, and one end of the other connecting rod 111 is rotationally connected to one end of the base 2 away from the driving mechanism 4, and the other end is rotationally connected to the other end of the lifting platform 3 along the second direction Y, so that the two connecting rods 111 can cross rotationally to change the distance between the lifting platform 3 and the base 2. By connecting the two ends of the two connecting rods 111 to diagonally opposite corners, respectively, the distance between the one end of the two connecting rods 111 located on the lifting platform 3 and the one end located on the base 2 can be changed when the included angle between the two connecting rods 111 changes, thereby achieving the lifting of the lifting platform 3. When the driving mechanism 4 drives one end of one of the connecting rods 111 to move, since the connecting rod 111 is rotationally connected to the driving mechanism 4, the connecting rod 111 will rotate, and the other connecting rod 111 will also rotate under the driving of the connecting rod 111, so that the predetermined ends of the two connecting rods 111 approach or move away from each other. When the predetermined ends of the two connecting rods 111 approach each other, the lifting platform 3 rises, and when the predetermined ends of the two connecting rods 111 move away from each other, the lifting platform 3 descends.

[0070] Further, referring to Figure 1 and Figure 3The driving mechanism 4 comprises a power source 41 and a transmission assembly 42. The output end of the power source 41 is connected with the transmission assembly 42 to transmit the output power of the power source 41 to the transmission assembly 42, so that the transmission assembly 42 can move on the base 2, for example, slide in a specific embodiment. The two sides of the transmission assembly 42 are respectively rotationally connected with one connecting rod 111 of two sets of cross members 11, for driving the two connecting rods 111 of the cross members 11 to make cross rotation movement. When the transmission assembly 42 pushes towards the connecting rod 111, one end of the connecting rod rotationally connected with the transmission assembly 42 will be moved close to the other end due to the pushing force. Based on the rigidity of the connecting rod 111 and the rotationally connection of the other end of the connecting rod 111 with the lifting platform 3, the other end of the connecting rod 111 will convert the horizontal translation movement away from the transmission assembly 42 into the translation movement to lift the lifting platform 3. The overall lifting of the lifting platform 3 will drive the connecting rod 111 rotationally connected with the other end of the lifting platform 3 to be lifted in the height direction, and then take the hinge part of the connecting rod 111 as the rotation center, so as to drive the end of the connecting rod 111 connected with the base 2 to rotate. Similarly, when the transmission assembly 42 moves away from the connecting rod 111, the connecting rod 111 will be pulled towards the transmission assembly 42, so that the two connecting rods 111 are lowered in the vertical direction, and the length in the horizontal direction is converted, so as to achieve the purpose of lowering the lifting platform 3.

[0071] Further, the lifting platform 3 is slidably provided with a driven assembly 31 located at one end of the lifting platform 3 along the second direction Y. At least one connecting rod 111 of each set of cross members 11 is rotationally connected with the driven assembly 31 away from the base 2, so that the driven assembly 31 can slide on the lifting platform 3 with the cross rotation movement of the connecting rod 111. When the driving mechanism 4 drives the lifting structure 1 to act, the part of the lifting structure 1 connected with the driven assembly 31 will drive the driven assembly 31 to slide on the lifting platform 3 to adapt to the position change of the end of the connecting rod 111 in the lifting structure 1, so as to realize the lifting of the lifting platform 3.

[0072] In some embodiments, please refer to Figure 3The driving mechanism 4 further comprises an elastic member 43, two ends of the elastic member 43 are connected with the base 2 and the transmission assembly 42 respectively, and the sliding of the transmission assembly 42 can change the deformation of the elastic member 43. By arranging the elastic member 43, the movement of the transmission assembly 42 to push the cross member 11 is facilitated, so as to improve the weight that the cross member 11 can lift. For example, during the landing of the lifting platform 3, the power source 41 drives the transmission assembly 42 to move towards the power source 41, the elastic member 43 is deformed by the pulling force of the transmission assembly 42, and the two connecting rods 111 of the cross member 11 gradually fold to reduce the height of the lifting platform 3. Because the gravity of the lifting platform 3 and / or the unmanned aerial vehicle 5 does not need to be overcome during the landing, compared with lifting the lifting platform 3 and / or the unmanned aerial vehicle 5, the power required is lower, and the gravity will further assist the landing of the lifting platform 3. In order to avoid that the landing speed is too fast to cause damage to the unmanned aerial vehicle 5 and the lifting platform 3, the deformation of the elastic member 43 can slow down the landing speed and improve the stability of the landing of the lifting platform 3. In the lifting state of the lifting platform 3, the power source 41 drives the transmission assembly 42 to move away from the power source 41, and the elastic force of the elastic member 43 will further drive the transmission assembly 42 to move away from the power source 41, so as to improve the power and adapt to the gravity of the components that need to be overcome in the lifting state, such as the lifting platform 3 and the unmanned aerial vehicle 5, thereby assisting the lifting of the lifting platform 3 by the lifting structure 1.

[0073] In some embodiments, the unmanned aerial vehicle platform has a lifting state and a landing state, and the lifting state has at least one of the following characteristics compared with the landing state:

[0074] The distance between the transmission assembly 42 and the power source 41 is larger;

[0075] The deformation degree of the elastic member 43 is smaller;

[0076] The intersection angle α3 formed by the two connecting rods 111 towards the base 2 is smaller.

[0077] For example, during the switching of the unmanned aerial vehicle platform from the lifting state to the landing state, the power source 41 drives the transmission assembly 42 to slide towards the power source 41, the elastic member 43 is stretched and deformed along with the sliding of the transmission assembly 42, and the intersection angle α3 formed by the two connecting rods 111 towards the base 2 gradually increases along with the sliding of the transmission assembly 42, so as to reduce the distance between the base 2 and the lifting platform 3.

[0078] During the process of switching the drone platform from the landing state to the lifting state, the power source 41 drives the transmission component 42 to slide in a direction away from the power source 41, the elastic element 43 deforms in a direction away from the drive source, and the angle α3 formed by the two connecting rods 111 toward the base 2 gradually decreases as the transmission component 42 slides, so as to increase the distance between the base 2 and the lifting platform 3.

[0079] In some embodiments, see Figure 4 and Figure 5 Each set of cross members 11 includes at least two connecting rods 111, with the middle portions of the at least two connecting rods 111 hinged together to form a hinged section, allowing the two connecting rods 111 to rotate crosswise. When one end of the two connecting rods 111 is subjected to a pushing force, the two connecting rods 111 will drive their respective other ends to rotate around the hinged section 117, thereby changing the distance between the two ends of one connecting rod 111 and the other connecting rod 111, realizing the switching of the length of the cross member 11 in the horizontal and vertical directions, thus realizing the lifting function of the cross member 11. This lifting structure 1 only requires four connecting rods 111, with two connecting rods 111 forming a cross member 11 to realize the lifting of the lifting platform 3, which has a simple structure and good motion synchronization.

[0080] In other embodiments, each set of cross members 11 may consist of three connecting rods 111, with two connecting rods 111 fixedly connected to form a connecting rod group, thereby increasing the strength of the connecting rod group. The hinged portion of the connecting rod group and the hinged portion of the other connecting rod 111 are rotatably connected to each other, so that the connecting rods 111 and the connecting rod group can rotate crosswise. This not only improves the overall strength and load-bearing capacity of the cross member 11, but also enables the cross member 11 to drive the lifting platform 3 to rise and fall.

[0081] In some embodiments, the cross-sectional area of ​​the hinge portion of the connecting rod 111 is larger than the cross-sectional area of ​​both ends of the connecting rod 111, so as to specifically strengthen the strength of the connecting rod 111 at the hinge portion, which can improve the load-bearing capacity of the connecting rod 111 and minimize the increase in the mass of the connecting rod 111.

[0082] In some embodiments, the sum of the thicknesses of the hinge portions 117 of the two connecting rods 111 in each set of cross members 11 is greater than the sum of the thicknesses of the ends of the two connecting rods 111. Since the hinge portions 117 of the two connecting rods 111 are rotatably connected to each other, and the ends of the connecting rods 111 that bear the load rotate around the hinge portions 117, the stress on the hinge portions 117 of the connecting rods 111 becomes more complex, resulting in lower strength and making them more susceptible to damage due to excessive load. Therefore, in this embodiment, increasing the thickness of the hinge portions 117 of the two connecting rods 111 improves the load-bearing capacity of the hinge portions 117, thereby improving the overall load-bearing capacity and strength of the cross member 11.

[0083] In some embodiments, the thickness of the end of one connecting rod 111 in each set of cross members 11 is greater than the thickness of the end of the other connecting rod 111, so that when the two connecting rods 111 are combined to form the cross member 11, the overall strength of the cross member 11 can be improved. Furthermore, the specific connecting rod 111 whose end thickness is increased can be selected according to the actual situation.

[0084] Furthermore, the thickness of the hinge portion 117 of one connecting rod 111 in each set of cross members 11 is greater than the thickness of the hinge portion 117 of the other connecting rod 111, further improving the overall strength of the cross member 11. Regarding the thickness relationship between the two connecting rods 111, it can be that the thickness of the end and the thickness of the hinge portion 117 of one connecting rod 111 are both greater than the thickness of the end and the thickness of the hinge portion 117 of the other connecting rod 111. Alternatively, it can be that the thickness of the end of one connecting rod 111 is greater than the thickness of the end of the other connecting rod 111, and the thickness of the hinge portion 117 is less than the thickness of the hinge portion 117 of the other connecting rod 111.

[0085] In some embodiments, the thickness of the hinge portion 117 of one connecting rod 111 in each set of cross members 11 is greater than the thickness of the hinge portion 117 of the other connecting rod 111. This is beneficial to improve the strength of the individual connecting rod 111 and also to improve the overall strength of the cross member 11. Furthermore, since the thickened portion is the hinge portion 117 where the two connecting rods 111 are rotatably connected, the strength of the rotatably connected portion, which is subject to more complex stress and has lower strength, is specifically improved, which helps to save material costs.

[0086] In some embodiments, the two connecting rods 111 have different thicknesses, with the thinner connecting rod 111 located between the other connecting rod 111 and the lifting platform 3. This helps protect the thinner connecting rod 111 and prevents it from being damaged due to being exposed on the outside. Furthermore, reducing the thickness of the inner connecting rod 111 helps reduce the overall weight of the lifting structure 1, meeting the requirements for lightweight construction.

[0087] In some embodiments, referring to Figure 6 The lifting structure 1 further comprises a reinforcing rod 12 connected between the two groups of cross members 11, further improving the strength of the lifting structure 1.

[0088] Further, the reinforcing rod 12 is connected with one of the connecting rods 111 of the two groups of cross members 11 closer to the lifting platform 3. And the connecting rod 111 with smaller thickness, i.e. lower strength, is arranged between the lifting platform 3 and the other connecting rod 111, so that the two ends of the reinforcing rod 12 are respectively connected with the connecting rods 111 with smaller thickness of the two groups of cross members 11, which is beneficial to make up for the insufficient strength of the connecting rods 111 with smaller thickness.

[0089] Further, the cross-sectional area of the part where the reinforcing rod 12 is connected with the connecting rod 111 is larger than that of the adjacent part of the connecting rod, which is beneficial to specifically enhance the strength and load-bearing capacity of the lifting structure 1.

[0090] In some embodiments, referring to Figure 9 and Figure 10 The connecting rod 111 comprises a first segment 115 and a second segment 116. The first segment 115 is connected with the second segment 116 to form a hinge part 117 for the rotation connection of the two connecting rods 111. The connection between the first segment 115 and the second segment 116 is integrally formed, which improves the overall strength of the connecting rod 111.

[0091] Further, the connection between the first segment 115 and the second segment 116 forms a first included angle α1, so that the shape formed by the line connecting the end point of the end of the first segment 115 away from the hinge part 117, the end point of the end of the second segment 116 away from the hinge part 117, and the point of rotation connection of the hinge part 117 is a triangle, which is beneficial to improve the overall strength of the connecting rod 111.

[0092] In some embodiments, referring to Figure 9 and Figure 10The connecting rod 111 further comprises a third section 118, the first section 115 is adapted to be hinged with the base 2 of the UAV platform or the driving mechanism 4 of the UAV platform, and the third section 118 is connected with the second section 116 and forms a second included angle a2. By means of the included angle connection of the third section 118 and the second section 116, the second section 116 can form an included angle with the third section 118 when the third section 118 is connected with the lifting platform 3, so as to avoid the interference between the second section 116 and some components on the lifting platform 3, such as the landing platform, the UAV 5, etc. By comparison, if the third section 118 is not provided, and the second section 116 is directly connected with the lifting platform 3, a part of the second section 116 close to the lifting platform 3 may be located above the lifting platform 3 during the lifting process. If the load on the lifting platform 3 exceeds the edge of the lifting platform 3 at this time, the second section 116 may interfere with the part of the load, and even cause damage to the lifting structure 1 and the load during lifting.

[0093] Further, the second included angle a2 is greater than 90°, so that the included angle between the second section 116 and the third section 118 is obtuse, the avoidance space between the second section 116 and the third section 118 is enlarged, and the interference between the second section 116 or the third section 118 and the load on the lifting platform 3 is further avoided.

[0094] Further, the surface where the third section 118 is connected with the second section 116 is an arc surface, which is beneficial to improve the connection strength and smoothness of the third section 118 and the second section 116, and can also slightly improve the avoidance space compared with the sharp corner transition of the second section 116 and the third section 118.

[0095] In some embodiments, in a set of crosspieces 11, the third section 118 in one connecting rod 111 is connected with the second section 116, and the third section 118 in another connecting rod 111 is connected with the second section 116, and then the two connecting rods 111 are mirror image arranged, so that the third sections 118 in the two connecting rods 111 can be located at two corner angles of the lifting platform 3 respectively, and the stability and balance of the lifting platform 3 during lifting are improved.

[0096] In some embodiments, the connecting rod 111 is provided with a guide rod 112 for guiding the unmanned aerial vehicle 5 to land and fold the rotors 51 of the unmanned aerial vehicle 5. During the process of landing on the landing platform 3, the unmanned aerial vehicle 5 can determine the position where it needs to land according to the position of the guide rod 112, and the edge of the rotor 51 of the unmanned aerial vehicle 5 can be in contact with the guide rod 112, thereby guiding the unmanned aerial vehicle 5 to land on the landing platform 3. When the landing platform 3 is switched from the lifting state to the landing state, the guide rod 112 moves towards the landing platform 3, gradually exceeds the height of the landing platform 3, and is inserted between two of the multiple rotors 51 of the unmanned aerial vehicle 5. After the power of the rotation of the rotors 51 of the unmanned aerial vehicle 5 is turned off, the multiple rotors 51 will continue to rotate under the action of inertia, then touch the guide rod 112, stop rotating and fold. It should be noted that the rotors 51 of the unmanned aerial vehicle 5 in the figure are disc-shaped, but in fact the rotors 51 are not disc-shaped, but are long strips, and the disc-shaped diagram is a diagram of the rotation of the rotors 51.

[0097] Further, in a set of crosspieces 11, the first sections 115 of the two connecting rods 111 are provided with guide rods 112, and the two connecting rods 111 are mirror image arranged. The two guide rods 112 in the set of crosspieces 11 can be arranged close to two corners of the landing platform 3, so that one guide rod 112 corresponds to one flight arm of the unmanned aerial vehicle 5, and each flight arm is provided with multiple rotors 51, so that the multiple rotors 51 on each flight arm have corresponding guide rods 112 to assist in folding.

[0098] In some embodiments, when the unmanned aerial vehicle 5 lands on the landing platform 3, the height of the end of the guide rod 112 away from the connecting rod 111 is higher than the height of the rotors 51 of the unmanned aerial vehicle 5, so as to ensure that the guide rod 112 of the unmanned aerial vehicle 5 can guide and fold the rotors 51.

[0099] Further, the height difference between the height of the end of the guide rod 112 away from the connecting rod 111 and the height of the rotors 51 of the unmanned aerial vehicle 5 when landing on the landing platform 3 is 2-3 cm. In this embodiment, the height difference between the height of the end of the guide rod 112 away from the connecting rod 111 and the height of the rotors 51 of the unmanned aerial vehicle 5 when landing on the landing platform 3 is 2 cm, so as to ensure that the guide rod 112 of the unmanned aerial vehicle 5 can guide and fold the rotors 51.

[0100] Further, the guide rod 112 is provided with a guide surface at the end away from the connecting rod 111. When the rotor 51 of the unmanned aerial vehicle 5 contacts the guide rod 112, the unmanned aerial vehicle 5 can land on the lifting platform 3 accurately under the guidance of the guide rod 112. The guide surface is a smooth arc shape. For example, the end of the guide rod 112 is provided with a mushroom-shaped end cap, and the guide surface is the surface of the end cap, which is beneficial to reduce the friction damage and collision damage between the guide rod 112 and the rotor 51.

[0101] In some embodiments, referring to Figure 7 and Figure 8 , Figure 7 is a structural schematic diagram of a second view angle of a crosspiece in a lifting structure provided in an exemplary embodiment of the present disclosure; Figure 8 is a structural schematic diagram of a second view angle of another crosspiece in a lifting structure provided in an exemplary embodiment of the present disclosure. It should be noted that the second view angle refers to the view angle perpendicular to the thickness direction of the connecting rod 111, and in Figure 7 and Figure 8 , the shaft for connecting the two connecting rods 111 is omitted. The hinge position 117 of at least one of the two groups of crosspieces 11 is recessed away from the lifting platform 3 to form an avoiding position 113 for avoiding other load-bearing objects on the lifting platform 3, so as to avoid interference between the crosspiece 11 and the load-bearing object. In one example, the hinge position 117 of one of the two groups of crosspieces 11 is recessed away from the lifting platform 3. In this crosspiece 11, the hinge positions 117 of the two connecting rods 111 can be both recessed away from the lifting platform 3, or the hinge position 117 of the connecting rod 111 close to the lifting platform 3 is recessed away from the lifting platform 3. In another example, the hinge positions 117 of the two groups of crosspieces 11 are both recessed away from the lifting platform 3. In this crosspiece 11, the hinge positions 117 of the two connecting rods 111 can be both recessed away from the lifting platform 3, or the hinge position 117 of the connecting rod 111 close to the lifting platform 3 is recessed away from the lifting platform 3. In this embodiment, the hinge position 117 of one group of crosspieces 11 is recessed away from the lifting platform 3 to form an avoiding position 113, and the hinge positions 117 of the two connecting rods 111 in this crosspiece 11 are both recessed away from the lifting platform 3.

[0102] In some embodiments, the surface of the crosspiece 11 is provided with a plurality of reinforcing ribs 114 to improve the overall strength and load-bearing capacity of the crosspiece 11.

[0103] The present application carries out simulation experiments on the lifting structure, referring to Figures 11 to 13 , and the results are as follows:

[0104] Firstly, the vibration simulation of a specific type of lifting structure is carried out. The maximum stress of the lifting structure in the X direction under the vibration simulation is 122.11 MPa, the maximum stress in the Y direction is 5.28 MPa, and the maximum stress in the Z direction is 66.74 MPa. The X direction is the thickness direction of the lifting structure, the Y direction is the length direction of the lifting structure, and the Z direction is the width direction of the lifting structure. It can be seen that the maximum stress of the lifting structure in the thickness direction under the vibration state is much larger than the maximum stress in the Y direction and the Z direction. Therefore, the improvement of the lifting structure in the thickness direction can improve the strength and bearing capacity of the lifting structure.

[0105] Then, the simulation of the lifting structure in the static state is carried out. Three connection conditions of two connecting rods in the lifting structure are simulated in the static state respectively. The three connection conditions can be the connection conditions of the lifting structure when the unmanned aerial vehicle platform is in the lifting state, the landing state and the transition state between the lifting state and the landing state. The maximum stresses of the three connection conditions are 43.44 MPa, 55.63 MPa and 29.72 MPa respectively. It can be seen that the maximum stress of the lifting structure in the static state simulation is similar and within a reasonable range, which meets the strength requirement.

[0106] Finally, the vibration fatigue analysis of the lifting structure is carried out. The maximum damage of the lifting structure is 8.470E-04=0.000847, which is improved compared with the traditional lifting structure, so that the lifting structure is less likely to be damaged by fatigue.

[0107] The embodiment of the application provides a vehicle comprising the unmanned aerial vehicle platform as described in any one of the preceding embodiments, that is, a vehicle-mounted unmanned aerial vehicle platform. The vehicle comprises the unmanned aerial vehicle platform in the preceding embodiment, and therefore has the structures and advantages related to the unmanned aerial vehicle platform, which will not be described here.

[0108] It can be understood that the vehicle can be a fuel automobile, a plug-in hybrid electric vehicle or a new energy vehicle, and the present application does not make specific limitation thereon.

[0109] In the description of the application, the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0110] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0111] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0112] The above are only the preferred embodiments of the present application, and do not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution content of the present application and in accordance with the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A lifting structure, characterized in that, It includes two sets of cross members (11) arranged opposite to each other, each set of cross members (11) is respectively located on the corresponding side of the lifting platform (3), and is used to drive the lifting platform (3) to rise and fall; Each set of the cross members (11) includes at least two connecting rods (111) that are hinged to each other, wherein the cross-sectional area of ​​the hinge portion of at least one connecting rod (111) is greater than the cross-sectional area of ​​the connecting rod portion adjacent to it. The connecting rod (111) further includes a first segment (115) and a second segment (116), wherein the first segment (115) and the second segment (116) are connected to form a hinge portion (117) for rotatable connection of the connecting rod (111); The connection between the first segment (115) and the second segment (116) forms a first included angle (α1), such that the end point of the first segment (115) away from the hinge part (117), the end point of the second segment (116) away from the hinge part (117), and the point where the hinge part (117) is rotatably connected form a triangle. The hinge (117) is rotatably connected at a point on the side of the line connecting the end point of the first segment (115) away from the hinge (117) and the end point of the second segment (116) away from the hinge (117) close to the lifting platform (3). The connecting rod (111) is bent, and there is a bend on the side away from the lifting platform (3) on the first section (115) and the second section (116).

2. The lifting structure according to claim 1, characterized in that, The cross-sectional area of ​​the hinge portion of the connecting rod (111) is greater than the cross-sectional area of ​​both ends of the connecting rod (111).

3. The lifting structure according to claim 1, characterized in that, The sum of the cross-sectional areas of the hinged portions of the two connecting rods (111) in each set of the cross members (11) is greater than the sum of the cross-sectional areas of the ends of the two connecting rods (111).

4. The lifting structure according to claim 1, characterized in that, The thickness of the end of one of the connecting rods (111) in each set of the cross members (11) is greater than the thickness of the end of the other connecting rod (111); and / or, the thickness of the hinge portion (117) of one of the connecting rods (111) in each set of the cross members (11) is greater than the thickness of the hinge portion (117) of the other connecting rod (111).

5. The lifting structure according to claim 1, characterized in that, Each set of the cross member (11) includes two connecting rods (111) with different thicknesses. The connecting rod (111) with the smaller thickness is located between the other connecting rod (111) and the lifting platform (3).

6. The lifting structure according to claim 1, characterized in that, The connecting rod (111) further includes a third segment (118), the first segment (115) being adapted to be hinged to the base (2) of the UAV platform or the drive mechanism (4) of the UAV platform, and the third segment (118) being connected to the second segment (116) to form a second included angle (α2).

7. The lifting structure according to claim 6, characterized in that, The second included angle (α2) is greater than 90°.

8. The lifting structure according to claim 6, characterized in that, The surface where the third segment (118) connects to the first segment (115) is an arc surface, or the surface where the third segment (118) connects to the second segment (116) is an arc surface.

9. The lifting structure according to claim 1, characterized in that, The connecting rod (111) is provided with a guide rod (112), which is suitable for guiding the UAV to land and retracting the UAV's rotor.

10. The lifting structure according to claim 9, characterized in that, When the UAV lands on the lifting platform (3), the height of the end of the guide rod (112) away from the connecting rod (111) is higher than the height of the UAV's rotor.

11. The lifting structure according to claim 10, characterized in that, The height difference between the end of the guide rod (112) away from the connecting rod (111) and the height of the rotor when the UAV lands on the lifting platform (3) is 2-3 cm.

12. The lifting structure according to claim 9, characterized in that, The end of the guide rod (112) away from the connecting rod (111) is provided with a guide surface.

13. The lifting structure according to any one of claims 1 to 12, characterized in that, The hinge portion (117) of at least one of the two sets of cross members (11) is recessed in a direction away from the lifting platform (3) to form a clearance position (113).

14. The lifting structure according to any one of claims 1 to 12, characterized in that, The lifting structure (1) also includes a reinforcing rod (12), which is connected between the two sets of the cross members (11).

15. The lifting structure according to claim 14, characterized in that, The reinforcing rod (12) is connected to a connecting rod (111) of the two sets of cross members (11) that is closer to the lifting platform (3).

16. The lifting structure according to claim 14, characterized in that, The cross-sectional area of ​​the part where the reinforcing rod (12) connects to the connecting rod (111) is larger than the cross-sectional area of ​​the part of the connecting rod adjacent to it.

17. The lifting structure according to any one of claims 1 to 12, characterized in that, The surface of the cross member (11) is provided with multiple reinforcing ribs (114).

18. An unmanned aerial vehicle (UAV) platform, characterized in that, include: Base (2); A lifting platform (3) is arranged opposite to the base (2); The lifting structure as described in any one of claims 1 to 17 rotatably connects the base (2) and the lifting platform (3); and The drive mechanism (4) drives the lifting structure (1) to lift the lifting platform (3) in a coordinated manner.

19. The unmanned aerial vehicle platform according to claim 18, characterized in that, Two sets of cross members (11) are respectively provided on opposite sides of the lifting platform (3) along the first direction (X); the cross member (11) includes at least two connecting rods (111), the hinged parts (117) of the connecting rods (111) are rotatably connected to each other, and the two ends of at least one connecting rod (111) are respectively rotatably connected to one end of the lifting platform (3) along the second direction (Y) and the driving mechanism (4), and the two ends of at least one connecting rod (111) are respectively rotatably connected to one end of the base (2) away from the driving mechanism (4) and the other end of the lifting platform (3) along the second direction (Y), so that the connecting rods (111) can rotate crosswise to change the distance between the lifting platform (3) and the base (2).

20. The unmanned aerial vehicle platform according to claim 19, characterized in that, The drive mechanism (4) includes a power source (41) and a transmission assembly (42). The output end of the power source (41) is connected to the transmission assembly (42) to transmit the output power of the power source (41) to the transmission assembly (42), so that the transmission assembly (42) can translate relative to the base (2). The two sides of the transmission assembly (42) are respectively rotatably connected to one connecting rod (111) of the two sets of cross members (11) to drive the connecting rod (111) in the cross member (11) to perform cross rotation.

21. The unmanned aerial vehicle platform according to claim 19, characterized in that, A driven component (31) is slidably provided on the lifting platform (3). The driven component (31) is located at one end of the lifting platform (3) along the second direction (Y). At least one connecting rod (111) in each set of cross members (11) is rotatably connected to the driven component (31) at one end away from the base (2) so that the driven component (31) can slide on the lifting platform (3) as the connecting rod (111) rotates.

22. The unmanned aerial vehicle platform according to claim 20, characterized in that, The drive mechanism (4) further includes an elastic element (43), the two ends of which are connected to the base (2) and the transmission assembly (42) respectively, and the movement of the transmission assembly (42) can change the deformation of the elastic element (43).

23. The unmanned aerial vehicle platform according to claim 22, characterized in that, The unmanned aerial vehicle platform has a lifting state and a landing state. Compared with the landing state, the lifting state has at least one of the following characteristics: The distance between the transmission assembly (42) and the power source (41) is greater; The elastic element (43) has a smaller degree of deformation; The angle (α3) formed by the two connecting rods (111) toward the base (2) is smaller.

24. A vehicle, characterized in that, Including the unmanned aerial vehicle platform as described in any one of claims 18 to 23.

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