Landing Gear and Drone

Abstract

This application relates to a landing gear and a drone. The landing gear includes a rotating part, a fixed part, and a leg assembly. The rotating part includes a rotating column and a rotating motor; the rotating column extends in the height direction; the rotating motor is connected to the rotating column to drive the rotating column to rotate around a rotation axis parallel to the height direction; the rotating column includes a side surface extending in the height direction; the fixed part includes a side wall extending in the height direction and a receiving cavity surrounded by the side wall; at least part of the rotating part is disposed in the receiving cavity; the fixed part further includes a guide groove provided on the side wall; and the leg assembly includes a pivot end and a free end; the pivot end is pivotally connected to the side surface; the free end passes through the guide groove; wherein, the guide groove is configured such that when the rotating motor drives the leg assembly to move in the guide groove, the guide groove can cause the leg assembly to change the position of the free end in the height direction.

Description

Technical Field

[0001] This application relates to the technical field of unmanned aerial vehicles, and particularly to a landing gear and an unmanned aerial vehicle. Background Art

[0002] In order to take off and land smoothly, current unmanned aerial vehicles are usually equipped with landing gears. There are generally three common types of landing gears: fixed landing gears, automatically retractable landing gears, and manually retractable landing gears. Among them, the fixed landing gear cannot be retracted, which will increase the resistance during the flight of the unmanned aerial vehicle. The structure of the automatically retractable landing gear is complex. The manually retractable landing gear cannot be automatically retracted and is inconvenient to use. Summary of the Invention

[0003] This application provides a landing gear and an unmanned aerial vehicle to solve some or all of the deficiencies in the related art.

[0004] In a first aspect of this application, a landing gear is provided, including:

[0005] A rotating part, including a rotating column and a rotating motor; the rotating column extends in the height direction; the rotating motor is connected to the rotating column to drive the rotating column to rotate around a rotation axis parallel to the height direction; the rotating column includes a side surface extending in the height direction;

[0006] A fixing part, including a side wall extending in the height direction and a receiving cavity surrounded by the side wall; at least part of the rotating part is arranged in the receiving cavity; the fixing part further includes a guide groove arranged on the side wall; and

[0007] A leg assembly, including a pivoting end and a free end; the pivoting end is pivotally connected to the side surface; the free end passes through the guide groove; wherein, the guide groove is arranged such that when the rotating motor drives the leg assembly to move in the guide groove, the guide groove can cause the leg assembly to change the position of the free end in the height direction.

[0008] Further, the leg assembly includes a plurality of leg units, and the guide groove includes a plurality of guide rail units; the plurality of guide rail units extend around the rotation axis; the guide rail unit includes a starting point and an ending point; there is a spacing between the starting point and the ending point in the height direction.

[0009] Further, at the starting point, the extending axis of the guide rail unit is inclined relative to the rotation axis.

[0010] Further, in the height direction, the pivoting end is arranged between the starting point and the ending point; or, the pivoting end is flush with the starting point.

[0011] Further, the fixing part includes a connecting unit disposed perpendicular to the rotation axis; the rotation motor is fixedly connected to the connecting unit; the rotation motor and the rotating column are disposed in the accommodating cavity.

[0012] Further, the fixing part includes a connecting unit disposed perpendicular to the rotation axis; the connecting unit includes a connecting hole; the rotating part includes a rotating shaft; the rotating shaft is disposed between the rotating column and the rotation motor and is fixedly connected to the rotating column and the rotation motor respectively; the rotating column and a part of the rotating shaft are disposed in the accommodating cavity; the connecting hole sleeves the rotating shaft.

[0013] Further, the connecting unit includes a hollow structure extending along the height direction.

[0014] Further, the landing gear includes:

[0015] A fastener, the fastener is cooperatively connected with the rotating shaft to fix the position of the connecting unit in the height direction.

[0016] Further, the fastener includes a first nut and a second nut arranged along the height direction; one side of the first nut abuts against the connecting unit and the other side abuts against the second nut.

[0017] Further, the landing gear further includes:

[0018] A rolling bearing, sleeved on the rotating shaft;

[0019] The rolling bearing is disposed between the rotating shaft and the connecting hole; or, the rolling bearing is disposed on at least one side of the connecting unit in the height direction.

[0020] Further, a motor hole is provided on the end face of the rotating shaft facing the rotation motor; the drive shaft of the rotation motor cooperates with the motor hole to drive the rotating shaft to rotate.

[0021] Further, the fixing part includes an upper end face in the height direction and a flange unit disposed on the upper end face; the flange unit is provided with a plurality of positioning holes.

[0022] A second aspect of the present application provides a drone, including a fuselage, wings connected to the fuselage, and a power device for driving the wings to move; the drone further includes a landing gear disposed on the fuselage; the landing gear includes:

[0023] The rotating part includes a rotating column and a rotating motor; the rotating column extends in the height direction; the rotating motor is connected to the rotating column to drive the rotating column to rotate around a rotation axis parallel to the height direction; the rotating column includes a side surface extending in the height direction;

[0024] The fixed part includes a side wall extending in the height direction and a receiving cavity surrounded by the side wall; at least part of the rotating part is arranged in the receiving cavity; the fixed part further includes a guide groove arranged on the side wall; and

[0025] The leg assembly includes a pivoting end and a free end; the pivoting end is pivotally connected to the side surface; the free end passes through the guide groove; wherein, the guide groove is arranged such that when the rotating motor drives the leg assembly to move in the guide groove, the guide groove can cause the leg assembly to change the position of the free end in the height direction.

[0026] Further, the leg assembly includes a plurality of leg units, and the guide groove includes a plurality of guide rail units; the plurality of guide rail units extend around the rotation axis; the guide rail unit includes a starting point and an ending point; there is a spacing between the starting point and the ending point in the height direction.

[0027] Further, at the starting point, the extension axis of the guide rail unit is inclined relative to the rotation axis.

[0028] Further, in the height direction, the pivoting end is arranged between the starting point and the ending point; or, the pivoting end is flush with the starting point.

[0029] Further, the fixed part includes a connecting unit arranged perpendicular to the rotation axis; the rotating motor is fixedly connected to the connecting unit; the rotating motor and the rotating column are arranged in the receiving cavity.

[0030] Further, the fixed part includes a connecting unit arranged perpendicular to the rotation axis; the connecting unit includes a connecting hole; the rotating part includes a rotating shaft; the rotating shaft is arranged between the rotating column and the rotating motor and is fixedly connected to the rotating column and the rotating motor respectively; the rotating column and part of the rotating shaft are arranged in the receiving cavity; the connecting hole sleeves the rotating shaft.

[0031] Further, the connecting unit includes a hollow structure extending in the height direction.

[0032] Further, the landing gear includes:

[0033] A fastener, the fastener is cooperatively connected with the rotating shaft to fix the position of the connecting unit in the height direction.

[0034] Further, the fastener includes a first nut and a second nut arranged along the height direction;

[0035] One side of the first nut abuts against the connecting unit, and the other side abuts against the second nut.

[0036] Further, the landing gear further includes:

[0037] A rolling bearing sleeved on the rotating shaft;

[0038] The rolling bearing is disposed between the rotating shaft and the connecting hole; alternatively, the rolling bearing is disposed on at least one side of the connecting unit in the height direction.

[0039] Further, a motor hole is provided on an end face of the rotating shaft facing the rotating motor; a driving shaft of the rotating motor is fitted with the motor hole to drive the rotating shaft to rotate.

[0040] Further, the fixing portion includes an upper end face in the height direction and a flange unit provided on the upper end face; the flange unit is provided with a plurality of positioning holes.

[0041] The technical solution provided by the embodiments of the present application may include the following beneficial effects:

[0042] As can be seen from the above embodiments, the landing gear of the present application can be switched between a retracted state and a support state by a single rotating motor, with a simple and reliable structure. The minimization of the number of rotating motors greatly

[0043] reduces the overall weight of the landing gear. In addition, the state switching of the landing gear does not require manual assistance, which is beneficial to improving the intelligence and automation level of the landing gear.

[0044] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present

[0046] application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 Shown is an overall schematic diagram of an embodiment of the landing gear of the present application, in which the landing gear is in a retracted state.

[0048] Figure 2 shown as Figure 1 an overall schematic diagram of the landing gear shown in a supported state.

[0049] Figure 3 shown as Figure 1 a schematic diagram of the rotating part and the leg assembly of the landing gear shown.

[0050] Figure 4 an overall schematic diagram of another embodiment of the landing gear of the present application is shown.

[0051] Figure 5 shown as Figure 4 a schematic diagram of the rotating part and the leg assembly of the landing gear shown.

[0052] Wherein, 100 landing gear, 1 rotating part, 11 rotating columns, 111 side surfaces, 12 rotating motors, 13 rotating shafts, 131 motor holes, 2 fixing parts, 21 side walls, 22 accommodating cavities, 23 guide grooves, 231 guide rail units, 232 starting points, 233 ending points, 24 connecting units, 241 hollow structures, 25 upper end surfaces, 26 flange units, 261 positioning holes, 27 lower end surfaces, 3 leg assemblies, 31 pivot ends, 32 free ends, 33 leg units, 4 fasteners, 41 first nuts, 42 second nuts, 5 rolling bearings, RA rotation axis, Z height direction. Detailed implementation manners

[0053] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The manners described in the following exemplary embodiments do not represent all manners consistent with the present application. On the contrary, they are merely examples of devices consistent with some aspects of the present application as detailed in the appended claims.

[0054] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the existence of at least one. When referring to "one" alone, it will be further specified separately. "Plurality" or "several" means two or more. Unless otherwise indicated, terms such as "front", "rear", "lower" and / or "upper" are for convenience of description only and are not limited to one position or a spatial orientation. Terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "the" and "said" used in the specification and appended claims of this application are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0055] Reference Figures 1 to 5 , this application provides a landing gear 100. The landing gear 100 can be mounted on flight devices such as unmanned aerial vehicles, toy airplanes, etc. The landing gear 100 includes a rotating part 1, a fixed part 2, and a leg assembly 3. The rotating part 1 includes a rotating column 11 and a rotating motor 12. The rotating column 11 extends along the height direction Z and includes a side surface 111 extending along the height direction Z. The rotating motor 12 is connected to the rotating column 11 to drive the rotating column 11 to rotate about a rotation axis RA parallel to the height direction Z. The fixed part 2 includes a side wall 21 extending along the height direction Z and a receiving cavity 22 surrounded by the side wall 21. At least a part of the rotating part 1 is disposed in the receiving cavity 22. The fixed part 2 further includes a guide groove 23 provided on the side wall 21. The leg assembly 3 includes a pivot end 31 and a free end 32. The pivot end 31 is pivotally connected to the side surface 111, and the free end 32 passes through the guide groove 23. Wherein, the guide groove 23 is arranged such that when the rotating motor 12 drives the leg assembly 3 to move in the guide groove 23, the guide groove 23 can cause the leg assembly 3 to change the position of the free end 32 in the height direction Z.

[0056] According to Figure 1 and Figure 2As can be seen from the illustrated embodiments, when the rotary motor 12 drives the rotary column 11 to rotate about the rotation axis RA, the rotary column 11 can drive the leg assembly 3 to rotate together. The leg assembly 3 extends out of the guide groove 23 from the accommodation cavity 22. The shape of the guide groove 23 can drive the pivoting of the leg assembly 3 at the pivoting end 31, so that the free end 32 of the leg assembly 3 can move up and down in the height direction Z.

[0057] The fixing part 2 includes an upper end face 25 and a lower end face 27 in the height direction Z. The upward movement of the free end 32 can be regarded as the free end 32 moving towards the upper end face 25 in the height direction Z. At this time, the free end 32 is located between the lower end face 27 and the upper end face 25. This application refers to this state as the retracted state. The downward movement of the free end 32 can be regarded as the free end 32 moving towards the lower end face 27 in the height direction Z. At this time, the free end 32 is located on the side of the lower end face 27 away from the upper end face 25. This application refers to this state as the supporting state. When the landing gear 100 is in the supporting state, the free end 32 can contact the ground or any parking surface and support the entire landing gear 100, so that the lower end face 27 is kept at a certain distance from the ground.

[0058] By setting it like this, the landing gear 100 can be switched between the retracted state and the supporting state by a single rotary motor 12, with a simple and reliable structure. The minimization of the number of rotary motors 12 greatly reduces the overall weight of the landing gear 100. In addition, the state switching of the landing gear 100 does not require manual intervention, which is beneficial to improving the intelligence and automation level of the landing gear 100.

[0059] It should be noted that the rotary column 11 in the illustrated embodiments of the drawings is a cylinder, but this should be regarded as exemplary rather than restrictive. In other embodiments, the rotary column 11 can be, for example, a triangular prism, a quadrangular prism or other prisms, and this application does not limit this.

[0060] In some embodiments, the landing gear 100 is connected to the flying device by means of welding, bonding, etc. Alternatively, the fixing part 2 can include a flange unit 26 provided on the upper end face 25. The flange unit 26 is provided with a plurality of positioning holes 261. The positioning holes 261 correspond to the mating holes on the flying device, so as to realize the detachable connection between the landing gear 100 and the flying device, which is convenient for the assembly and maintenance of the landing gear 100 or the flying device.

[0061] The leg assembly 3 includes a plurality of leg units 33. Correspondingly, the guide slot 23 also includes a plurality of rail units 231. The plurality of rail units 231 extend around the rotation axis RA. The rail unit 231 includes a starting point 232 and an end point 233, and there is a spacing between the starting point 232 and the end point 233 in the height direction Z. In other words, the position of the free end 32 in the height direction Z when the leg unit 33 is located at the starting point 232 is different from the position of the free end 32 in the height direction Z when the leg unit 33 is located at the end point 233. In this way, the landing gear 100 can be switched between the retracted state and the supporting state.

[0062] By setting in this way, those skilled in the art can set the height difference between the starting point 232 and the end point 233 according to actual needs to adjust the distance that the free end 32 can move in the height direction Z. In addition, the provision of multiple leg units 33 enables the user to replace the damaged leg units 33 individually when one or more of the leg units 33 are damaged, without having to replace the entire leg assembly 3, thereby reducing the maintenance and repair costs of the landing gear 100 in the later stage.

[0063] Figure 1 and Figure 2 In the illustrated embodiment, the leg assembly 3 includes three leg units 33. Since three points can define a plane, when the landing gear 100 is in a supporting state, the free ends 32 of the three leg units 33 of this embodiment can define a plane, so that the landing gear 100 can be stably parked on the ground. This embodiment can achieve stable parking of the landing gear 100 with a minimum of leg units 33, and is conducive to reducing the overall weight of the landing gear 100. Of course, in other embodiments, four, five or even more leg units 33 may be included, and the present application is not limited to this. More leg units 33 can play a "spare" effect. During the use of the landing gear 100, if one of the leg units 33 is damaged, the other leg units 33 can also form a parking plane to prevent the landing gear 100 from failing.

[0064] In addition, the plurality of guide rail units 231 are independent of each other. Therefore, one leg unit 33 can only move in one guide rail unit 231. When the leg unit 33 is located at the starting point 232, the landing gear 100 is in the retracted state. When the landing gear 100 needs to be switched to the supporting state, the rotary motor 12 can drive the rotary column 11 to rotate forward, so that the leg unit 33 moves toward the end point 233 and stops at the end point 233. When the landing gear 100 needs to be switched to the retracted state, the rotary motor 12 drives the rotary column 11 to rotate reversely, so that the leg unit 33 moves toward the starting point 232 and stops at the starting point 232. By setting it in this way, the starting point 232 and the end point 233 can limit the movement of the leg unit 33, so as to avoid excessive movement of the leg assembly 3 after the accuracy of the rotary motor 12 decreases. Of course, the rotating column 11 may also be reversed, and the leg unit 33 may move toward the starting point 232; the rotating column 11 may be forwardly rotated, and the leg unit 33 may move toward the ending point 233, and the present application does not limit this.

[0065] In this embodiment, the guide rail unit 231 is configured to be an arc-shaped concave toward the lower end surface 27, but this should be taken as an example rather than a limitation. In other embodiments, the guide rail unit 231 may be configured to be an arc-shaped concave toward the upper end surface 25, or may be configured to extend along a straight line, and the present application does not limit this. In addition, the shapes of the plurality of guide rail units 231 may be the same or different.

[0066] Furthermore, at the starting point 232, the extension axis of the guide rail unit 231 is inclined relative to the rotation axis RA. It is easy to understand that if the extension axis of the guide rail unit 231 is parallel to the rotation axis RA at the starting point 232, the wall surface of the guide rail unit 231 will limit the leg unit 33, making it difficult for the leg unit 33 to move. Therefore, by such a setting, the parameter requirements for the rotating motor 12 can be reduced, and the strength requirements for the leg unit 33 and the guide rail unit 231 can also be avoided.

[0067] The landing gear 100 of the present application can also adjust the position of the leg assembly 3 in the retracted state by adjusting the position of the pivot end 31. In some embodiments, the pivot end 31 is arranged between the starting point 232 and the end point 233. In this embodiment, when the leg assembly 3 is located at the starting point 232, since the pivot end 31 is lower than the starting point 232 in the height direction Z, the free end 32 is closer to the upper end surface 25 than the pivot end 31. At this time, the leg assembly 3 can be regarded as tilted upward. Alternatively, in other embodiments, the pivot end 31 is flush with the starting point 232. In this embodiment, when the leg assembly 3 is located at the starting point 232, the pivot end 31 and the free end 32 are on the same plane. At this time, the leg assembly 3 can be regarded as extending horizontally.

[0068] Therefore, those skilled in the art can set the inclination angle of the outrigger assembly 3 when the outrigger assembly 3 is in the retracted state according to actual requirements. When detection elements such as airborne vision, infrared sensors, and laser loads are provided on the flight device connected to the landing gear 100, those skilled in the art can avoid the occlusion of the detection elements by the outrigger assembly 3 when the outrigger assembly 3 is in the retracted state by adjusting the position of the pivot end 31 to ensure the normal operation of the detection elements. In addition, in the embodiment where the outrigger assembly 3 is inclined obliquely upward, since the outrigger assembly 3 fits more closely to the fixing portion 2 of the landing gear 100, it is beneficial to reduce the wind resistance of the outrigger assembly 3 during the flight of the flight device.

[0069] In some embodiments, the fixing portion 2 includes a connecting unit 24 disposed perpendicular to the rotation axis RA. Refer to Figure 1 and Figure 2 , the connecting unit 24 is disposed close to the upper end face 25. The connecting unit 24 includes a connecting hole. The rotating portion 1 includes a rotating shaft 13. The rotating shaft 13 is disposed between the rotating column 11 and the rotating motor 12 and is fixedly connected to the rotating column 11 and the rotating motor 12 respectively. The rotating column 11 and a part of the rotating shaft 13 are disposed in the accommodating cavity 22, and the connecting hole is sleeved on the rotating shaft 13. In other words, in this embodiment, the rotating motor 12 is located on the side of the upper end face 25 away from the lower end face 27 in the height direction Z. When the landing gear 100 is connected to the flight device, the upper end face 25 is connected to the flight device, so that the rotating motor 12 can be hidden in the flight device, improving the aesthetics and structural compactness. By providing the connecting unit 24, it is beneficial to ensure the coincidence degree of the extension axis of the fixing portion 2 and the rotation axis RA, and further ensure the smooth rotation of the rotating portion 1 and the smooth switching of the landing gear 100 between the two states.

[0070] The rotating shaft 13 and the drive shaft of the rotating motor 12 can be fixedly connected by means such as bonding and welding, or can also be connected by a coupling. Or as Figure 3 shown, the end face of the rotating shaft 13 facing the rotating motor 12 is provided with a motor hole 131. The drive shaft of the rotating motor 12 cooperates with the motor hole 131 to drive the rotating shaft 13 to rotate. Figure 3 As shown in

[0071] the motor hole 131 is square, and the square drive shaft can cooperate with the square motor hole 131 to realize the rotation of the rotating shaft 13. In other embodiments, the motor hole 131 can also be a round hole and is provided with a keyway to cooperate with the drive shaft with a key structure. The present application does not limit this. By providing the motor hole 131, the detachable connection between the rotating motor 12 and the rotating column 11 can be realized without increasing the components of the landing gear 100, which is convenient for assembly and disassembly.To further fix the relative positions between the rotating part 1 and the connecting unit 24, the landing gear 100 further includes a fastener 4. The fastener 4 is cooperatively connected with the rotating shaft 13 to fix the position of the connecting unit 24 in the height direction Z. By such an arrangement, the position of the connecting unit 24 in the height direction Z is fixed, and thus the position of the fixing part 2 in the height direction Z is also fixed. In this way, it is possible to avoid the position deviation of the fixing part 2 in the height direction Z caused by the vibration of the fixing part 2 when the rotating motor 12 rotates, thereby affecting the movement of the leg assembly 3 in the guide groove 23.

[0072] The fastener 4 can be a snap ring clamped on the rotating shaft 13 and is arranged on the side of the connecting unit 24 away from the upper end face 25, so as to be able to fix the position of the connecting unit 24 in the height direction Z. Alternatively, as Figure 3 shown, the fastener 4 can include a first nut 41 and a second nut 42 arranged along the height direction Z. One side of the first nut 41 abuts against the connecting unit 24 and the other side abuts against the second nut 42. In other words, the position of the connecting unit 24 is fixed by the first nut 41. Since the connecting unit 24 is in contact with the rotating column 11, if the fit between the connecting unit 24 and the rotating column 11 is too tight, it will result in excessive friction, which is likely to cause wear and material fatigue. The first nut 41 can fix the connecting unit 24 on the rotating shaft 13 and keep the connecting unit 24 and the rotating column 11 in a relatively loose contact. The second nut 42 can be tightened to maintain a tight contact with the first nut 41, thereby fixing the first nut 41 at the desired position, and further being able to fix the connecting unit 24 at the desired position.

[0073] Further, in some embodiments, the landing gear 100 further includes a rolling bearing 5 sleeved on the rotating shaft 13. The rolling bearing 5 can be arranged between the rotating shaft 13 and the connecting hole. In this embodiment, the inner ring of the rolling bearing 5 is in cooperation with the rotating shaft 13, and the connecting hole is in cooperation with the outer ring of the rolling bearing 5. By such an arrangement, it is possible to reduce the friction between the rotating part 1 and the fixing part 2 when the rotating part 1 rotates, and further reduce the noise generated by the friction as well as the wear and fatigue caused by the friction.

[0074] Or, in some other embodiments, the rolling bearing 5 is arranged on at least one side of the connecting unit 24 in the height direction Z. As shown in FIGS. 2 and Figure 3As shown, rolling bearings 5 are arranged on both sides of the connecting unit 24 in the height direction Z, so as to limit the position of the connecting unit 24 in the height direction Z. In addition, rolling bearings 5 are arranged between the connecting unit 24 and the rotating column 11, and rolling bearings 5 are also arranged between the connecting unit 24 and the fastener 4. Therefore, when the rotating part 1 rotates, the original friction areas between the connecting unit 24 and the rotating column 11, and between the connecting unit 24 and the fastener 4 are both converted into the friction area between the connecting unit 24 and the inner ring of the rolling bearing 5. In this way, the friction area is greatly reduced, which is beneficial to reducing the influence of friction on the connecting unit 24 and the rotating column 11. After the long-term use of the landing gear 100, the worn landing gear 100 can be repaired by replacing the worn rolling bearings 5.

[0075] It should be noted that in other embodiments, it may also be that rolling bearings 5 are arranged on the side of the connecting unit 24 close to the rotating column 11, or it may be that rolling bearings 5 are arranged on the side of the connecting unit 24 far from the rotating column 11. The present application does not limit this.

[0076] In the embodiment provided with the fastener 4, the fastener 4 cooperates with the rolling bearing 5 to limit the position of the rolling bearing 5 in the height direction Z, and thus indirectly limits the position of the connecting unit 24 in the height direction Z. Therefore, the advantages described for the embodiment in which the fastener 4 directly fixes the connecting unit 24 also apply to the embodiment in which the fastener 4 indirectly fixes the connecting unit 24, and the present application will not elaborate on this.

[0077] In some embodiments, the rotating motor 12 is arranged close to the lower end face 27. Refer to Figure 4 and Figure 5 , the connecting unit 24 is arranged on the lower end face 27. The rotating motor 12 is fixedly connected to the connecting unit 24, and the rotating motor 12 and the rotating column 11 are arranged in the accommodating cavity 22. This arrangement can completely arrange the rotating part 1 in the accommodating cavity 22, improving the structural compactness of the landing gear 100. And the repair and maintenance of the rotating motor 12 do not involve the flight device itself, and only need to remove the landing gear 100 for separate repair. In addition, since the rotating motor 12 is arranged in the accommodating cavity 22, the landing gear 100 can be simply connected to the flight device without re-modifying the flight device, expanding the application range of the landing gear 100.

[0078] In each of the above embodiments, the connecting unit 24 includes a hollow structure 241 extending in the height direction Z. By providing the hollow structure 241, it is beneficial to reduce the material used for the connecting unit 24, and thus reduce the overall weight of the landing gear 100.

[0079] The present application also provides a drone. The drone includes a fuselage, wings connected to the fuselage, and a power device for driving the wings to move. The drone also includes the landing gear 100 described in the foregoing embodiments. The landing gear 100 is connected to the fuselage. By providing the landing gear 100 of the present application, the drone can switch the landing gear 100 between the retracted state and the supporting state through a single rotary motor 12, simplifying the structure of the drone. The minimization of the number of rotary motors 12 greatly reduces the overall weight of the landing gear 100. Moreover, when the drone takes off and lands, the switching of the landing gear 100 does not require manual intervention, which is conducive to improving the intelligence and automation level of the drone.

[0080] In addition, since the free end 32 can move in the height direction Z, when detection elements such as cameras, lidars, and infrared sensors are connected to the drone on the fixing portion 2, the leg assembly 3 will not block the field of view of the detection elements, so as not to affect the operation of the detection elements.

[0081] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application pertains can make various modifications, supplements, or use similar methods to replace the described specific embodiments, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0082] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

Claims

1. A landing gear, characterized in that, Comprising: A rotating part, including a rotating column and a rotating motor; The rotating column extends in the height direction; the rotating motor is connected to the rotating column to drive the rotating column to rotate around a rotation axis parallel to the height direction; the rotating column includes a side surface extending in the height direction; A fixing part, including a side wall extending in the height direction and a receiving cavity surrounded by the side wall; at least part of the rotating part is arranged in the receiving cavity; the fixing part further includes a guide groove arranged on the side wall; And A leg assembly, including a pivoting end and a free end; the pivoting end is pivotally connected to the side surface; the free end passes through the guide groove; wherein, the guide groove is arranged such that when the rotating motor drives the leg assembly to move in the guide groove, the guide groove can cause the leg assembly to change the position of the free end in the height direction; The leg assembly includes a plurality of leg units, and the guide groove includes a plurality of guide rail units; the plurality of guide rail units extend around the rotation axis; the guide rail unit includes a starting point and an ending point; there is a spacing between the starting point and the ending point in the height direction; At the starting point, the extending axis of the guide rail unit is inclined relative to the rotation axis.

2. The landing gear according to claim 1, characterized in that, In the height direction, the pivoting end is arranged between the starting point and the ending point; or, the pivoting end is flush with the starting point.

3. The landing gear according to claim 1, characterized in that, The fixing part includes a connecting unit arranged perpendicular to the rotation axis; the rotating motor is fixedly connected to the connecting unit; the rotating motor and the rotating column are arranged in the receiving cavity.

4. The landing gear according to claim 1, characterized in that, The fixing part includes a connecting unit arranged perpendicular to the rotation axis; the connecting unit includes a connecting hole; the rotating part includes a rotating shaft; the rotating shaft is arranged between the rotating column and the rotating motor and is fixedly connected to the rotating column and the rotating motor respectively; the rotating column and part of the rotating shaft are arranged in the receiving cavity; the connecting hole sleeves the rotating shaft.

5. The landing gear according to any one of claims 3 or 4, characterized in that, The connecting unit includes a hollow structure extending in the height direction.

6. The landing gear according to claim 4, characterized in that The landing gear includes: A fastener, which is cooperatively connected with the rotating shaft to fix the position of the connecting unit in the height direction.

7. The landing gear according to claim 6, characterized in that, The fastener includes a first nut and a second nut arranged in the height direction; one side of the first nut abuts against the connecting unit and the other side abuts against the second nut.

8. The landing gear according to claim 4, characterized in that The landing gear further includes: A rolling bearing, sleeved on the rotating shaft; The rolling bearing is arranged between the rotating shaft and the connecting hole; or, the rolling bearing is arranged on at least one side of the connecting unit in the height direction.

9. The landing gear according to claim 4, wherein The end face of the rotating shaft facing the rotating motor is provided with a motor hole; the driving shaft of the rotating motor is cooperated with the motor hole to drive the rotating shaft to rotate.

10. The landing gear according to claim 1, characterized in that, The fixing part includes an upper end face in the height direction and a flange unit arranged on the upper end face; the flange unit is provided with a plurality of positioning holes.

11. A drone, comprising a fuselage, wings connected to the fuselage, and a power device for driving the wings to move; the drone further comprises landing gears arranged on the fuselage; characterized in that, The landing gear includes: The rotating part includes a rotating column and a rotating motor; the rotating column extends in the height direction; the rotating motor is connected to the rotating column to drive the rotating column to rotate around a rotation axis parallel to the height direction; the rotating column includes a side surface extending in the height direction. The fixed part includes a side wall extending in the height direction and a receiving cavity surrounded by the side wall; at least part of the rotating part is disposed in the receiving cavity; the fixed part further includes a guide groove disposed on the side wall; and The leg assembly includes a pivoting end and a free end; the pivoting end is pivotally connected to the side surface; the free end passes through the guide groove; wherein, the guide groove is configured such that when the rotating motor drives the leg assembly to move in the guide groove, the guide groove can cause the leg assembly to change the position of the free end in the height direction. The leg assembly includes a plurality of leg units, and the guide groove includes a plurality of guide rail units; the plurality of guide rail units extend around the rotation axis; the guide rail unit includes a starting point and an ending point; there is a spacing between the starting point and the ending point in the height direction. At the starting point, the extension axis of the guide rail unit is inclined with respect to the rotation axis.

12. The drone according to claim 11, wherein, In the height direction, the pivoting end is disposed between the starting point and the ending point; or, the pivoting end is flush with the starting point.

13. The drone according to claim 11, characterized in that, The fixed part includes a connecting unit disposed perpendicular to the rotation axis; the rotating motor is fixedly connected to the connecting unit; the rotating motor and the rotating column are disposed in the receiving cavity.

14. The drone according to claim 11, characterized in that, The fixed part includes a connecting unit disposed perpendicular to the rotation axis; the connecting unit includes a connecting hole; the rotating part includes a rotating shaft; the rotating shaft is disposed between the rotating column and the rotating motor and is fixedly connected to the rotating column and the rotating motor respectively; the rotating column and part of the rotating shaft are disposed in the receiving cavity; the connecting hole sleeves the rotating shaft.

15. The drone according to any one of claims 13 or 14, characterized in that, The connecting unit includes a hollow structure extending in the height direction.

16. The drone according to claim 14, wherein The landing gear includes: A fastener, which is cooperatively connected with the rotating shaft to fix the position of the connecting unit in the height direction.

17. The drone according to claim 16, wherein, The fastener includes a first nut and a second nut arranged in the height direction; one side of the first nut abuts against the connecting unit and the other side abuts against the second nut.

18. The drone according to claim 14, wherein, The landing gear further includes: A rolling bearing, sleeved on the rotating shaft; The rolling bearing is disposed between the rotating shaft and the connecting hole; or, the rolling bearing is disposed on at least one side of the connecting unit in the height direction.

19. The drone according to claim 14, wherein, A motor hole is provided on the end face of the rotating shaft facing the rotating motor; the driving shaft of the rotating motor cooperates with the motor hole to drive the rotating shaft to rotate.

20. The drone according to claim 11, wherein, The fixed part includes an upper end face in the height direction and a flange unit disposed on the upper end face; the flange unit is provided with a plurality of positioning holes.

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