Axial folding paddle and unmanned aerial vehicle

Abstract

The invention relates to the technical field of unmanned aerial vehicles, and particularly discloses an axial folding paddle and an unmanned aerial vehicle, the axial folding paddle comprises a paddle seat and a paddle rotationally connected with the paddle seat, the paddle seat comprises a paddle seat body and a locking mechanism, the two opposite ends of the paddle seat body are provided with a containing groove and a paddle clamp, and the locking mechanism is arranged in the containing groove; one end of each blade is provided with a connecting part rotationally connected with the corresponding blade clamp, and a locking groove is formed in the end face of each connecting part; wherein the locking mechanism can be matched with the locking groove to limit and fix the paddle, the locking mechanism comprises a sliding rod, a shifting rod connected with the sliding rod, an elastic piece arranged on the sliding rod in a sleeving mode and a locking rod arranged at one end of the sliding rod, and when the paddle rotates around the connecting shaft to be unfolded under the action of centrifugal force, the elastic piece is locked to the locking rod. Under the action of elastic potential energy of the elastic piece and surface treatment of the connecting positions of the blades, the locking rods can rapidly and automatically slide into the corresponding locking grooves to automatically lock the blades, the swing amplitude and vibration of the blades are reduced, the propeller efficiency is improved, and the flight attitude and the cruising effect of the unmanned aerial vehicle are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to an axially foldable propeller blade and a UAV. Background Art

[0002] In the related technology, the folding propeller structure mainly includes horizontal folding and axial folding. The blades are movably connected to the blade clamps. During flight, the rotation of the motor is mainly used to drive the blades to rotate, and the centrifugal force is used to straighten the blades. Unlike the horizontal folding, the application scenarios of the axial folding propeller structure are more limited (such as fixed-wing UAVs, tube-launched aircraft or patrol aircraft). At the same time, the axial folding propeller knot relies on centrifugal force to straighten the blades when unfolding. Due to the influence of the gravity of the blades, on the one hand, a greater centrifugal force is required to make the blades in a fully unfolded state. On the other hand, the blades are more likely to swing and vibrate widely, resulting in low propeller efficiency and affecting the flight attitude and cruise effect of the aircraft. Summary of the Invention

[0003] The present application aims to propose an axially folding propeller blade and a UAV, so as to solve the problem in the related art that the axially folding propeller structure is prone to swing amplitude and large vibration during flight, resulting in low propeller efficiency and affecting the flight attitude and cruise effect of the aircraft.

[0004] To achieve the above objectives, in a first aspect, embodiments of the present application provide an axially foldable propeller blade, comprising a propeller seat and a propeller blade connected to the propeller seat, the propeller seat comprising a propeller seat body and a locking mechanism, the propeller seat body being provided with a receiving groove and a propeller clamp adjacent to the receiving groove at two opposite ends, the locking mechanism being disposed in the receiving groove and having a locking rod facing the propeller clamp; One end of the blade has a connecting portion rotatably connected to the blade clamp, and an end surface of the connecting portion is provided with a locking groove; The locking rod is configured to selectively cooperate with the locking groove to limit and fix the blade.

[0005] In some embodiments, a limiting hole is formed on a surface of the receiving groove facing away from the paddle clamp, and the locking mechanism includes: A sliding rod arranged along the second direction, wherein one end portion of the sliding rod extends to be slidably connected to the limiting hole; a shift rod arranged along a first direction, one end of the shift rod being connected to the surface of the sliding rod; An elastic member is coaxially sleeved on the surface of the slide rod, with two ends of the elastic member respectively abutting against the shift rod and the surface of the receiving groove; The first direction and the second direction are respectively the thickness direction and the length direction of the paddle seat body.

[0006] In some embodiments, the locking rod is arranged along a third direction C, the locking rod is connected to one end of the sliding rod away from the limiting hole, and both ends of the locking rod extend to abut against the two opposite surfaces of the accommodating groove, and the third direction C is the width direction of the paddle seat body.

[0007] In some embodiments, the rotation axis of the blade is arranged along the third direction C. When the blade is folded along the first direction, the locking rod abuts against the adjacent surface of the locking groove. When the blade is unfolded along the second direction, the locking rod at least partially slides into the locking groove.

[0008] In some embodiments, two opposite sides of the connecting portion are respectively provided with an adjacent first surface and a second surface, and the second surface is inclined from the position adjacent to the first surface toward the locking groove.

[0009] In some embodiments, the paddle seat further includes a pressure plate covering the accommodating groove, the pressure plate having a protrusion on a surface facing the accommodating groove, and a sliding cavity of the locking mechanism is formed between the protrusion and the bottom surface of the accommodating groove.

[0010] In some embodiments, a rib is provided on the surface of the protrusion facing the accommodating groove, and a limiting groove is provided on the rib along the second direction, and the limiting groove is configured to limit the sliding direction of the sliding rod.

[0011] In some embodiments, a second guide sliding hole is opened on the surface of the pressure plate along the first direction, and the end of the shift rod away from the sliding rod passes through the second guide sliding hole and extends to the outside of the contour of the paddle seat, and / or A first guide sliding hole is formed on the bottom surface of the accommodating groove along the first direction, and one end of the shifting rod facing away from the sliding rod passes through the first guide sliding hole and extends to the outside of the contour of the paddle seat.

[0012] In some embodiments, the first guide sliding hole and / or the second guide sliding hole are long strip holes distributed along the first direction, and the shifting rod can slide along the first guide sliding hole and / or the second guide sliding hole.

[0013] In a second aspect, the present application provides a drone comprising an axially foldable blade as described in any one of the embodiments of the first aspect above.

[0014] Compared with the prior art, the technical solutions provided by the above embodiments of the present application have at least the following beneficial effects: The axially folding blades of the present application are achieved by providing a locking groove at the end of the blade and a locking mechanism at the connection between the blade seat and the blade. The locking mechanism includes a slide rod, a lever connected to the side surface of the slide rod, elastic parts sleeved on the two ends of the slide rod surface and respectively abutting against the lever and the surface of the accommodating groove, and a locking rod provided at one end of the slide rod. When the blade is in a folded state, the locking rod abuts against the side surface of the blade end. When the blade is rotated around the axis connected to the blade seat by centrifugal force to be unfolded, the locking rod automatically slides into the corresponding locking groove under the action of the elastic potential energy of the elastic part, thereby automatically locking the blade after the blade pops open, reducing the swing amplitude and vibration of the blade, improving the propeller efficiency, and ensuring the flight attitude and cruising effect of the drone.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a schematic structural diagram of an axially foldable paddle deployed according to an embodiment of the present application; Figure 2 is a schematic structural diagram of an axially foldable paddle according to an embodiment of the present application; Figure 3 is an exploded schematic diagram of a paddle seat according to an embodiment of the present application; Figure 4 is a structural schematic diagram of a paddle seat body according to an embodiment of the present application; Figure 5 is a structural schematic diagram of the paddle seat body and the locking mechanism according to an embodiment of the present application; Figure 6 is a schematic structural diagram of a pressing plate according to an embodiment of the present application; Figure 7 It is a structural schematic diagram of a blade according to an embodiment of the present application.

[0018] Reference numerals: 10. Axially folding propeller; 100, paddle seat; 110, paddle seat body; 111, mounting portion; 112, receiving groove; 1121, first guide sliding hole; 1122, limiting hole; 113, paddle clamp; 1131, first connecting hole; 120, locking mechanism; 121, sliding rod; 122, shift lever; 123, elastic member; 124, locking rod; 130, pressure plate; 131, raised portion; 1311, second guide sliding hole; 132, rib; 1321, limiting groove; 140, pin; 150, bolt; 200, blade; 210, blade portion; 220, connecting portion; 221, second connecting hole; 222, locking groove; 223, first surface; 224, second surface; A. First direction; B. Second direction; C. Third direction. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.

[0021] In this application, "and / or" is simply a term used to describe the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] In order to make the purpose, technical solutions and advantages of this application more clear, this application is further described in detail below with reference to the accompanying drawings and embodiments.

[0024] See also Figures 1 to 2 The present embodiment provides an axially foldable propeller blade 10, which includes a propeller seat 100 and a propeller blade 200 rotatably connected to the propeller seat 100. The two propeller blades 200 are mirror-connected to both ends of the propeller seat 100. Specifically, the two propeller blades 200 are rotatably connected to the propeller seat 100 through a pin shaft. At the same time, when the two propeller blades 200 are unfolded from a folded state to a horizontal state with the propeller seat 100, the propeller seat 100 can lock the propeller blades 200.

[0025] The inventors found that, unlike the traditional horizontal folding method, in the axial folding method, when the driving motor drives the blade 200 to rotate to the unfolding process, the gravity direction of the blade 200 and the centrifugal force direction of the blade 200 always change continuously. Specifically, taking the case of the axially folded blade 10 rotating to the vertical direction, due to the gravity of the blade 200 and the influence of the centrifugal force during the rotation process, the gravity direction of the blade 200 above the propeller seat 100 is opposite to the centrifugal force direction, while the gravity direction of the blade 200 below the propeller seat 100 is the same as the centrifugal force direction, and the propeller seat This state of 100 and blade 200 still exists indirectly. At the same time, taking when the axially folded blade 10 is rotated to the horizontal direction as an example, the gravity of the blade 200 on the propeller seat 100 is just supported by the propeller clamp, and the direction of gravity and the direction of centrifugal force are perpendicular to each other. Therefore, during the axial folding and rotational expansion process, the blade is more likely to swing and vibrate greatly. At the same time, since the direction of gravity is opposite to or intersecting with the direction of centrifugal force, a greater centrifugal force is required to put the blade in a fully expanded state. This requires higher energy consumption, which affects the flight attitude and cruise effect of the drone.

[0026] The axially folding blade 10 provided in this embodiment has a locking mechanism 120. When in the folded state, the locking mechanism 120 can provide a certain force to maintain the stability of the blade 200 in the folded state. During the deployment process, due to the structural optimization of the end face of the blade 200 and the action of the locking mechanism 120, the locking mechanism 120 can improve the deployment efficiency of the blade 200, so that the blade 200 reaches the deployed state faster. When the blade 200 is deployed, the blade 200 can be locked and fixed, which can prevent the propeller from axially swinging due to changes in speed, and simultaneously reduce the vibration caused by the swing, thereby improving the propeller efficiency and improving the flight effect.

[0027] The structure and functional principle of the paddle seat 100 and the paddle blade 200 of the present application will be further described below in conjunction with multiple embodiments. See also Figures 3 to 5 In order to facilitate the description of the structure of the paddle seat 100, the thickness direction of the paddle seat 100 is defined as the first direction A, the length direction of the paddle seat 100 is defined as the second direction B, and the width direction of the paddle seat 100 is defined as the third direction C, wherein, Figure 3 This is a schematic diagram of the explosion of the propeller seat 100 along the first direction A and the third direction C. The propeller seat 100 includes a propeller seat body 110, a locking mechanism 120 and a pressure plate 130. The two opposite ends of the propeller seat body 110 are provided with a receiving groove 112 and a propeller clamp 113 adjacent to the receiving groove 112. The locking mechanism 120 is arranged in the receiving groove 112, and the pressure plate 130 is covered on the receiving groove 112 to encapsulate the locking mechanism 120 in the receiving groove 112. The locking mechanism 120 is used to selectively lock and fix the propeller blade 200.

[0028] In some embodiments, a mounting portion 111 is provided in the central area of the paddle seat body 110, and the mounting portion 111 is used to connect an external drive motor, wherein the mounting portion 111 can be a plurality of axial holes and bolt connection holes for connection opened along the first direction A. The specific structure of the mounting portion 111 is not limited here. The paddle seat body 110 is mirrored at both ends along the second direction B with accommodating grooves 112, and the two accommodating grooves 112 are respectively arranged on both sides of the mounting portion 111. The end face of the accommodating groove 112 close to the mounting portion 111 is provided with a limiting hole 1122 along the second direction B, and a first guide slide hole 1121 can be opened on the bottom surface of the accommodating groove 112 along the first direction A. The first guide slide hole 1121 is a long strip hole distributed along the second direction B.

[0029] In some embodiments, the paddle clamp 113 and the accommodating groove 112 are integrally formed. The paddle clamp 113 can be two raised blocks arranged at intervals, and the space between the two raised blocks is hollowed out to form a rotation area for connecting the blade 200. A first connecting hole 1131 is opened along the third direction C and passes through the two raised blocks in sequence. The central axis of the first connecting hole 1131 is the central axis of rotation of the blade 200.

[0030] Combine Figure 3 and Figure 5 The locking mechanism 120 includes a sliding rod 121 and an elastic member 123 arranged along the second direction B, a lever 122 arranged along the first direction A, and a locking rod 124 arranged along the third direction C. One end of the sliding rod 121 extends to be slidably connected to the limiting hole 1122, one end of the lever 122 is connected to the surface of the sliding rod 121, and the elastic member 123 is coaxially sleeved on the circular surface of the sliding rod 121. The two ends of the elastic member 123 respectively abut against the lever 122 and the surface of the receiving groove 112, and the locking rod 124 faces the oar clamp 113. Optionally, the elastic member 123 is preferably a spring member, and of course it can also be a highly elastic polymer material, such as a rubber material. It should be noted that regardless of whether the blade 200 is in a folded or unfolded state, the elastic member 123 is in a compressed state. As for the elastic potential energy that the elastic member 123 needs to have when the blade 200 is folded or unfolded, it can be selected according to actual needs and is not limited here.

[0031] Optionally, one end of the sliding rod 121 is vertically connected to the middle area of the locking rod 124. The sliding rod 121 and the locking rod 124 can be connected by riveting, threading or welding, and the specific selection is made according to actual needs. The two opposite side surfaces of the accommodating groove 112 in the third direction C can be flat with each other, and the two ends of the locking rod 124 can respectively contact the two opposite planes of the accommodating groove 112. The shift rod 122 can be vertical and pass through the sliding rod 12 for connection, and the end of the shift rod 122 away from the sliding rod 121 can pass through the first guide slide hole 1121 and extend outside the outline of the paddle seat 100.

[0032] In this way, the lever 122 and the end of the lever 122 away from the slide rod 121 can pass through the first guide slide hole 1121 and extend outside the outline of the propeller seat 100. After the locking mechanism 120 locks and fixes the blade 200, the unfolded blade 200 can be manually unlocked when the drone completes the flight mission. Specifically, the lever 122 is pushed in the opposite direction, and then the blade 200 is folded. After releasing the lever 122, the locking rod 124 can abut against the side surface of the blade 200 under the action of the elastic potential energy of the elastic member 123, thereby fixing the folded blade 200. The two ends of the locking rod 124 can respectively abut against the two opposite planes of the accommodating groove 112, so as to ensure the stability of the sliding process of the locking rod 124.

[0033] Optionally, chamfers (not marked in the figure) that are close to the middle can be set on both sides of the end of the accommodating groove 112 near the paddle clip 113. In this way, after the locking mechanism 120 is installed, the locking rod 124 is affected by the elastic force of the elastic member, and the chamfer setting can stop the locking rod 124. On the one hand, it is more convenient to install the locking mechanism 120. On the other hand, it can prevent the locking rod 124 from applying a large force on the blade 200 after the blade 200 is folded, resulting in the blade 200 being over-folded or insufficiently folded, thereby failing to achieve a more ideal folded state.

[0034] Optionally, the blade 200 can be rotatably connected to the paddle clamp 113 through the pin 140 at the first connecting hole 1311, and the central axis of the locking rod 124 is parallel to the central axis of the pin 140. At the same time, the position of the locking rod 124 in the first direction A can be slightly higher than the position of the pin 140, thereby better ensuring the stability of the blade 200 in the folded state.

[0035] See also Figure 3 and Figure 6 The pressing plate 130 can be connected and fixed to the receiving groove 112 by bolts 150, wherein the pressing plate 130 covers the opening at the top of the receiving groove 112 so that the receiving groove 112 forms a relatively closed space, and a protrusion 131 is provided on the surface of the pressing plate 130 facing the receiving groove 112. The shape of the protrusion 131 is adapted to the contour of the receiving groove 112, that is, during the installation process of the pressing plate 130, the outer contour of the protrusion 131 fits the inner contour of the receiving groove 112. In this way, through the setting of the protrusion 131, on the one hand, a sliding cavity of the locking mechanism 120 is formed between the protrusion 131 and the bottom surface of the receiving groove 112, and on the other hand, the structural strength of the installation location of the locking mechanism 120 is increased.

[0036] Optionally, a rib 132 is provided on the surface of the protrusion 131 facing the accommodating groove 112, and the rib 132 has a limiting groove 1321 along the second direction B. The limiting groove 1321 is constructed to limit the sliding direction of the slide rod 121. The limiting groove 1321 is of the same size as the slide rod 121. The protrusion on one side of the limiting groove 1321 has a second guide slide hole 1311 along the first direction A. The end of the shift rod 122 away from the slide rod 121 passes through the second guide slide hole 1311 and extends outside the outline of the paddle seat 100. The second guide slide hole 1311 is an elongated hole distributed along the second direction B, and the shift rod 122 can slide along the second guide slide hole 1311.

[0037] It should be noted that, like the first guide slide hole 1121, the setting of the second guide slide hole 1311 is that after the locking mechanism 120 locks and fixes the blade 200, when the UAV completes the flight mission, the unfolded blade 200 can be manually unlocked. Specifically, the lever 122 is pushed in opposite directions, and then the blade 200 is folded. After releasing the lever 122, the locking rod 124 can abut against the side surface of the blade 200 under the action of the elastic potential energy of the elastic member 123, thereby also achieving the effect of fixing the folded blade 200.

[0038] The locking mechanism 120 is formed at the joint between the propeller seat 100 and the propeller 200, and the locking mechanism 120 is formed at the joint between the propeller seat 100 and the propeller 200. The locking mechanism 120 includes a slide bar 121, a lever 122 connected to the side surface of the slide bar 121, an elastic member 123 sleeved on the two ends of the surface of the slide bar 121 and respectively abutting against the lever 122 and the surface of the accommodating groove 112, and a locking rod 124 provided at one end of the slide bar 121. When the propeller 200 is in the folded state, the locking rod 124 abuts against the side surface of the end of the propeller 200. When the propeller 200 is rotated around the axis connected to the propeller seat 100 by centrifugal force to be unfolded, the locking rod 124 automatically slides into the corresponding locking groove 222 under the action of the elastic potential energy of the elastic member 123, thereby automatically locking the propeller after the propeller is ejected, reducing the swing amplitude and vibration of the propeller, improving the propeller efficiency, and ensuring the flight attitude and cruising effect of the drone.

[0039] See also Figure 7 The blade 200 includes a blade portion 210 and a connecting portion 220 integrally formed with the blade portion 210 and rotatably connected to the blade clamp 113. A locking groove 222 is defined on the end surface of the connecting portion 220 facing away from the blade portion 210. The locking groove 222 is arranged along the third direction C. A second connecting hole 221 is defined on the connecting portion 220 near the locking groove 222 along the third direction C. Adjacent first and second surfaces 223 and 224 are respectively provided on two opposite sides adjacent to the surface where the second connecting hole 221 is located. The second surface 224 is inclined from the position adjacent to the first surface 223 toward the end surface where the locking groove 222 is located.

[0040] Optionally, the second connecting hole 221 has a diameter comparable to that of the first connecting hole 1131, and the locking groove 222 can be a U-shaped groove or a C-shaped groove, so that it is easy to cooperate with the locking rod 124 to achieve a more stable locking and fixing effect. It should be noted that the first surface 223 can be set as a horizontal plane, and the second surface 224 can be set as an inclined surface inclined toward the end face where the locking groove 222 is located. When the locking rod 124 of the locking mechanism 120 is combined with the first surface 223, the locking rod 124 can fix the blade 200 more laterally, and the second surface 224 is inclined. When the blade 200 begins to unfold under the action of centrifugal force, the position of the locking rod 124 in the first direction A can be slightly higher than the position of the pin 140. When the locking rod 124 slides to the second surface 224, In this way, by respectively providing adjacent first surfaces 223 and second surfaces 224 on two opposite sides of the connecting portion 220 of the blade, the second surface 224 is inclined from the position adjacent to the first surface 223 toward the direction of the locking groove. The setting of the first surface 223 ensures the stability of the blade 200 in the folded state. The setting of the second surface 224 reduces the resistance of the locking rod 124 to automatically sliding into the locking groove 222 during the process of the blade 200 rotating around the axis connected to the propeller seat 100 under the action of centrifugal force. At the same time, the elastic member 123 further accumulates elastic potential energy, and when the locking rod 124 is about to slide into the locking groove 222, the purpose of the blade 200 automatically popping open can be achieved.

[0041] In some embodiments, a drone is also provided, comprising the axially folding blades as described in the above embodiments.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0043] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0044] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification does not necessarily mean that they are all the same embodiments, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0045] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An axially foldable blade, characterized in that: It comprises a paddle seat and a paddle connected to the paddle seat, and is characterized in that: The oar seat includes an oar seat body and a locking mechanism. The oar seat body is provided with a receiving groove and an oar clamp adjacent to the receiving groove at two opposite ends. The locking mechanism is disposed in the receiving groove and has a locking rod facing the oar clamp. One end of the blade has a connecting portion rotatably connected to the blade clamp, and an end surface of the connecting portion is provided with a locking groove; The locking rod is configured to selectively cooperate with the locking groove to limit and fix the blade.

2. The axially foldable blade according to claim 1, characterized in that: The surface of the receiving groove facing away from the propeller clamp is provided with a limiting hole, and the locking mechanism includes: A sliding rod arranged along the second direction, wherein one end portion of the sliding rod extends to be slidably connected to the limiting hole; a shift rod arranged along a first direction, one end of the shift rod being connected to the surface of the sliding rod; an elastic member, coaxially sleeved on the surface of the slide rod, with two ends of the elastic member respectively abutting against the shift rod and the side surface of the accommodating groove; The first direction and the second direction are respectively the thickness direction and the length direction of the paddle seat body.

3. The axially foldable blade according to claim 2, characterized in that: The locking rod is arranged along a third direction, and is connected to one end of the sliding rod away from the limiting hole. Both ends of the locking rod extend to abut against two opposite surfaces of the accommodating groove, and the third direction is the width direction of the paddle seat body.

4. The axially foldable blade according to claim 3, characterized in that: The rotation axis of the blade is arranged along the third direction. When the blade is folded along the first direction, the locking rod abuts against the adjacent surface of the locking groove. When the blade is unfolded along the second direction, the locking rod at least partially slides into the locking groove.

5. The axially foldable blade according to claim 1, characterized in that: Two opposite sides of the connecting portion are respectively provided with an adjacent first surface and a second surface, and the second surface is inclined from the position adjacent to the first surface toward the direction of approaching the locking groove.

6. The axially foldable blade according to claim 1, characterized in that: The paddle seat further comprises a pressure plate covering the accommodating groove, wherein a protrusion is provided on a surface of the pressure plate facing the accommodating groove, and a sliding cavity of the locking mechanism is formed between the protrusion and the bottom surface of the accommodating groove.

7. The axially foldable blade according to claim 6, characterized in that: A rib is provided on the surface of the protrusion toward the accommodating groove, and a limiting groove is provided on the rib along the second direction. The limiting groove is configured to limit the sliding direction of the sliding rod.

8. The axially foldable blade according to claim 6, characterized in that: A second guide sliding hole is opened on the surface of the pressure plate along the first direction, and the end of the shift rod away from the sliding rod passes through the second guide sliding hole and extends to the outside of the outline of the paddle seat, and / or A first guide sliding hole is formed on the bottom surface of the accommodating groove along the first direction, and one end of the shifting rod away from the sliding rod passes through the first guide sliding hole and extends to the outside of the contour of the paddle seat.

9. The axially foldable blade according to claim 8, characterized in that: The first guide sliding hole and / or the second guide sliding hole are long strip holes distributed along the first direction, and the shifting rod can slide along the first guide sliding hole and / or the second guide sliding hole.

10. A drone, characterized in that: The drone comprises the axially foldable blades according to any one of claims 1 to 9.

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