Driving device for folding propeller of unmanned aerial vehicle

Abstract

The invention discloses a driving device for a folding propeller of an unmanned aerial vehicle, and relates to the technical field of propellers, the driving device comprises blades, a first folding assembly, a second folding assembly and a propeller arm folding mechanism, the first folding assembly comprises a rotating shaft, an H-shaped frame, a mounting block, a lower clamping arm and an upper clamping arm, and the blades are fixedly mounted between the upper clamping arm and the lower clamping arm; a first folding driving part is arranged between the lower clamping arm and the H-shaped frame; the first folding driving part drives the paddle to be adjusted from a horizontal state to a vertical state; the second folding assembly comprises a mounting flange and a clamping cylinder, a second folding driving part is arranged between the clamping cylinder and the mounting flange, and the second folding driving part drives the rotating shaft to be adjusted to the horizontal state from the vertical state; the paddles are sequentially adjusted to be in the vertical state and the horizontal state through the first folding assembly and the second folding assembly, then the paddles are combined with the paddle arm folding mechanism to be recycled to the edge of the rack, and finally the space occupancy rate after the paddles are folded is further reduced through the dislocation mechanism.

Description

Technical Field

[0001] This invention relates to the field of propeller technology, specifically a drive device for folding propellers of unmanned aerial vehicles. Background Technology

[0002] Folding propellers have wide applications in the field of drones. For example, in some portable consumer drones, folding propellers allow users to easily carry the drone in a backpack. Meanwhile, in military reconnaissance drones, folding propellers help to store more drone equipment within the limited space of aircraft carriers or special operations aircraft.

[0003] Existing folding propellers for drones mostly require manual assistance during folding and can only be used for relatively small drones. Therefore, there is an urgent need to develop a drive device for folding propellers of unmanned aerial vehicles to adapt to the folding drive of propellers of drones of various sizes. Summary of the Invention

[0004] The purpose of this invention is to provide a drive device for folding propellers of unmanned aerial vehicles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A drive device for a folding propeller of an unmanned aerial vehicle includes a frame, on which multiple sets of extension arms are circumferentially mounted. Each extension arm is equipped with a propeller blade, and the propeller blades on each set of extension arms are symmetrically arranged. A first folding assembly is disposed between the propeller blades, and a second folding assembly is disposed between the extension arm and the first folding assembly. A propeller arm folding mechanism is disposed between the extension arm and the frame, and the propeller arm folding mechanism drives the extension arm to come close to the edge of the frame.

[0007] The first folding assembly includes a rotating shaft, on which an H-shaped frame and a mounting block are fixedly mounted. Lower clamping arms are symmetrically mounted on both ends of the H-shaped frame. Snap-fit ​​arms are provided on both ends of the mounting block. Arc-shaped frames are symmetrically arranged on both sides of the snap-fit ​​arms. An upper clamping arm is slidably snapped between the arc-shaped frames. The blade is fixedly mounted between the upper and lower clamping arms. A first folding drive unit is provided between the lower clamping arm and the H-shaped frame. The first folding drive unit drives the blade to adjust from a horizontal state to a vertical state.

[0008] The second folding assembly includes a mounting flange disposed at the end of the extension arm, a snap-fit ​​cylinder rotatably mounted on the mounting flange, a drive motor fixedly mounted at the bottom of the snap-fit ​​cylinder, the rotating shaft being connected to the output shaft of the drive motor, and a second folding drive unit disposed between the snap-fit ​​cylinder and the mounting flange, the second folding drive unit driving the rotating shaft to adjust from a vertical state to a horizontal state.

[0009] As a further embodiment of the present invention: the first folding drive unit includes an incomplete gear disposed on the side of the H-shaped frame. The incomplete gears are symmetrically arranged and mesh with each other. One of the incomplete gears is connected to a power motor. A pulley is coaxially mounted on the incomplete gear. A pulley is coaxially mounted on the rotational connection axis between the lower clamping arm and the H-shaped frame. A belt is disposed between the pulley and the pulley.

[0010] As a further embodiment of the present invention: a closed cover is provided between the H-shaped frame and the first folding drive unit, the closed cover is symmetrically arranged on both sides of the H-shaped frame, and an equivalent counterweight block that is centrally symmetrical with the first folding drive unit is provided in the closed cover on the other side.

[0011] As a further embodiment of the present invention: the extension arm is a telescopic structure, a lifting frame is provided on the top of the mounting block, an electric telescopic column is provided between the mounting block and the lifting frame, locking columns are provided at both ends of the lifting frame, and a mating hole is provided on the upper clamping arm corresponding to the locking column. When the upper clamping arm is in a horizontal state, the locking column is directly opposite the mating hole.

[0012] As a further embodiment of the present invention: the second folding drive unit includes a recycling groove disposed between the extension arms, a bevel gear set disposed between the extension arms and the mounting flange, and a locking post disposed at both ends of the locking cylinder, the locking post being rotatably mounted between the locking post and the mounting flange, the axial portion of the bevel gear set being connected to the power motor and the locking post respectively.

[0013] As a further embodiment of the present invention: a telescopic motor is horizontally fixedly installed at the end of the extension arm, the telescopic motor is connected to a flexible rod, the end of the flexible rod is connected to a locking rod, a guide groove is provided on the mounting flange, and two sets of locking holes are provided on the snap-fit ​​post, the interval angle between the two sets of locking holes is ninety degrees, and the locking rod and the locking holes cooperate with each other.

[0014] As a further embodiment of the present invention: the paddle arm folding mechanism includes a mounting frame disposed on the edge of the frame, the end of the extension arm is rotatably mounted between the mounting frame and the mounting frame, a motor is fixedly disposed on the mounting frame, the motor is connected to a drive gear, and the end edge of the extension arm is provided with a mating external tooth, the mating external tooth meshing with the drive gear.

[0015] As a further embodiment of the present invention: a misalignment mechanism is provided on the inner side of the frame, the misalignment mechanism is connected to the paddle arm folding mechanism, a lifting groove is provided on the edge of the frame, a snap-fit ​​slider is provided on the mounting frame, the mounting frame is slidably installed between the snap-fit ​​slider and the lifting groove, the misalignment mechanism includes a first driving bevel gear and a second driving bevel gear rotatably installed inside the frame, a transmission pulley and a belt are provided between the first driving bevel gear and the second driving bevel gear, the first driving bevel gear and the second driving bevel gear are respectively meshed with driven bevel gears, the driven bevel gears are connected to driving gears, a rack plate is fixedly provided on the snap-fit ​​slider, the driving gear and the rack plate mesh with each other, and the rack plate is fixedly connected to the snap-fit ​​slider.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The lower clamping arm and the upper clamping arm are installed using the H-frame and the mounting block, respectively. Under the drive of the first folding drive unit, the upper clamping arm, the lower clamping arm, and the blade as a whole are rotated around the mounting axis of the lower clamping arm, thereby adjusting the blade from a horizontal state to a vertical state, completing the first step of the folding operation. Subsequently, the second folding drive unit controls the rotation of the locking cylinder and the first folding assembly installed on it, so that the blade is adjusted from a vertical state to a horizontal state parallel to the extension arm. Finally, the blade is retracted to the edge of the frame by the blade arm folding mechanism, completing the folding and retraction drive of the blade.

[0018] (2) When the blades are adjusted to the horizontally deployed state, the upper clamping arm is locked by combining the electric telescopic column, the lifting frame, and the locking column, thereby locking the horizontally deployed blades and ensuring the stability of the blades during flight.

[0019] (3) By setting a lifting slide on the edge of the frame, after the propeller is folded and retracted to the edge of the frame, the first drive bevel gear is controlled to rotate, and the second drive bevel gear is driven to rotate synchronously in combination with the transmission pulley and belt. This drives the driven bevel gear to rotate, and the power is transmitted to the drive gear. The rotation of the drive gear drives the adjacent mounting frame to rise and fall along the lifting slide, thereby staggering the height of the mounting frame at the edge of the frame, so that the folded and retracted propellers are at different heights, thus providing more space for retrieving all propellers and further reducing the space occupation rate of the folded UAV. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the blade folding structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the blade deployment structure of the present invention.

[0022] Figure 3This is a schematic diagram of the unfolded installation of the propeller blades in this invention.

[0023] Figure 4 This is a schematic diagram of the structure of the first folding component in this invention.

[0024] Figure 5 This is a schematic diagram of the structure of the first folding drive unit in this invention.

[0025] Figure 6 This is a schematic diagram of the structure of the second folding component in this invention.

[0026] Figure 7 This is a schematic diagram illustrating the engagement of the snap-fit ​​cylinder and the locking rod in this invention.

[0027] Figure 8 This is a schematic diagram of the paddle arm folding mechanism in this invention.

[0028] Figure 9 This is a schematic diagram of the misalignment mechanism in this invention.

[0029] In the diagram: 1. Frame; 10. Lifting chute; 2. Paddle blade; 3. First folding assembly; 30. Rotating shaft; 31. H-frame; 32. Mounting block; 33. Electric telescopic column; 34. Lifting frame; 35. Locking column; 36. Lower clamping arm; 37. Upper clamping arm; 38. Arc-shaped frame; 39. Snap-fit ​​arm; 310. Incomplete gear; 311. Pulley one; 312. Belt one; 313. Pulley two; 4. Second folding assembly; 40. Snap-fit ​​cylinder; 400. Snap-fit ​​column; 401. Locking hole; 41. 42. Drive motor; 43. Mounting flange; 44. Bevel gear set; 45. Telescopic motor; 46. Flexible rod; 47. Locking rod; 48. Guide groove; 59. Paddle arm folding mechanism; 50. Extension arm; 51. Recovery trough; 52. Mating external gear; 53. Drive gear; 54. Motor one; 55. Mounting bracket; 66. Snap-fit ​​slider; 77. Misalignment mechanism; 80. Rack plate; 91. First drive bevel gear; 10. Belt two; 11. Second drive bevel gear; 12. Driven bevel gear; 13. Drive gear. Detailed Implementation

[0030] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 6As shown, a drive device for folding propellers of unmanned aerial vehicles includes a frame 1. Multiple sets of extension arms 50 are circumferentially mounted on the frame 1. Blades 2 are mounted on the extension arms 50. The blades 2 on each set of extension arms 50 are symmetrically arranged. A first folding assembly 3 is arranged between the blades 2. A second folding assembly 4 is arranged between the extension arm 50 and the first folding assembly 3. A propeller arm folding mechanism 5 is arranged between the extension arm 50 and the frame 1. The propeller arm folding mechanism 5 drives the extension arm 50 to come close to the edge of the frame 1.

[0032] like Figure 4 As shown, the first folding assembly 3 includes a rotating shaft 30, an H-shaped frame 31 and a mounting block 32 fixedly mounted on the rotating shaft 30, lower clamping arms 36 symmetrically mounted at both ends of the H-shaped frame 31, and snap-fit ​​arms 39 at both ends of the mounting block 32. Arc-shaped frames 38 are symmetrically arranged on both sides of the snap-fit ​​arms 39, and an upper clamping arm 37 is slidably snapped between the arc-shaped frames 38. The blade 2 is fixedly mounted between the upper clamping arm 37 and the lower clamping arm 36. A first folding drive unit is provided between the lower clamping arm 36 and the H-shaped frame 31. The first folding drive unit drives the blade 2 to adjust from a horizontal state to a vertical state.

[0033] like Figure 6 As shown, the second folding assembly 4 includes a mounting flange 42 disposed at the end of the extension arm 50. A snap-fit ​​cylinder 40 is rotatably mounted on the mounting flange 42. A drive motor 41 is fixedly mounted at the bottom of the snap-fit ​​cylinder 40. The rotating shaft 30 is connected to the output shaft of the drive motor 41. A second folding drive unit is disposed between the snap-fit ​​cylinder 40 and the mounting flange 42. The second folding drive unit drives the rotating shaft 30 to adjust from a vertical state to a horizontal state.

[0034] Specifically, the rotating shaft 30 drives the upper blade 2 to rotate. The lower clamping arm 36 and the upper clamping arm 37 are respectively installed through the H-shaped frame 31 and the mounting block 32. Under the drive of the first folding drive unit, the upper clamping arm 37, the lower clamping arm 36, and the blade 2 as a whole are controlled to rotate around the rotation mounting axis of the lower clamping arm 36, thereby adjusting the blade 2 from a horizontal state to a vertical state and completing the first step of the folding operation.

[0035] Subsequently, the second folding drive unit controls the locking cylinder 40 and the first folding assembly 3 installed on it to rotate, so that the blade 2 is adjusted from a vertical state to a horizontal state parallel to the extension arm 50. Finally, the blade 2 is retracted to the edge of the frame 1 by the blade arm folding mechanism 5, thus completing the folding and retraction drive of the blade 2.

[0036] Furthermore, such as Figure 4 , Figure 5As shown, the first folding drive unit includes an incomplete gear 310 disposed on the side of the H-shaped frame 31. The incomplete gears 310 are symmetrically arranged and mesh with each other. One of the incomplete gears 310 is connected to a power motor. A pulley 311 is coaxially mounted on the incomplete gear 310. A pulley 313 is coaxially mounted on the rotational connection axis between the lower clamping arm 36 and the H-shaped frame 31. A belt 312 is disposed between the pulley 311 and the pulley 313.

[0037] Specifically, the symmetrically arranged incomplete gears 310, pulley 1 311, pulley 2 313, and belt 1 312 drive the lower clamping arm 36, upper clamping arm 37, and blade 2 on both sides to rotate, thereby realizing the synchronous folding and retraction and unfolding control of blade 2.

[0038] Furthermore, such as Figure 4 , Figure 5 As shown, a closed cover is provided between the H-shaped frame 31 and the first folding drive unit. The closed cover is symmetrically arranged on both sides of the H-shaped frame 31. An equivalent counterweight block that is centrally symmetrical with the first folding drive unit is provided inside the closed cover on the other side.

[0039] Specifically, in order to reduce the aerodynamic resistance caused by the first folding drive unit on the side when the blade 2 rotates, a closed cover is set between the first folding drive unit and the H-frame 31. At the same time, a closed cover is set on the other side where the first folding drive unit is not installed. An equivalent counterweight block that is centrally symmetrical with the first folding drive unit is set in the closed cover to ensure the stability of the blade 2 during rotation.

[0040] The other side of the enclosure and the equivalent counterweight inside are not shown in the attached diagram.

[0041] Furthermore, such as Figure 4 , Figure 8 As shown, the extension arm 50 is a telescopic structure. A lifting frame 34 is provided on the top of the mounting block 32. An electric telescopic column 33 is provided between the mounting block 32 and the lifting frame 34. Locking columns 35 are provided at both ends of the lifting frame 34. Matching holes are provided on the upper clamping arm 37 at the corresponding positions of the locking columns 35. When the upper clamping arm 37 is in a horizontal state, the locking columns 35 are directly opposite the matching holes.

[0042] Specifically, the extension arm 50 is designed as a telescopic structure, which facilitates the adjustment of the blade 2 length according to the drone's payload requirements, thereby adjusting the drone's payload capacity. At the same time, in order to ensure the stability of the blade 2 during flight, when the blade 2 is adjusted to the horizontally deployed state, the upper clamping arm 37 is locked in conjunction with the electric telescopic column 33, the lifting frame 34, and the locking column 35, thereby locking the horizontally deployed blade 2.

[0043] Furthermore, such as Figure 6 , Figure 7As shown, the second folding drive unit includes a recycling groove 51 disposed between the extension arms 50, a bevel gear set 43 disposed between the extension arms 50 and the mounting flange 42, and a locking post 400 disposed at both ends of the locking cylinder 40. The locking post 400 is rotatably mounted between the mounting flange 42, and the axis of the bevel gear set 43 is connected to the power motor and the locking post 400 respectively.

[0044] Furthermore, such as Figure 6 , Figure 7 As shown, a telescopic motor 44 is horizontally fixedly installed at the end of the extension arm 50. The telescopic motor 44 is connected to a flexible rod 45. A locking rod 450 is connected to the end of the flexible rod 45. A guide groove 46 is provided on the mounting flange 42. Two sets of locking holes 401 are provided on the snap-fit ​​post 400. The interval angle between the two sets of locking holes 401 is ninety degrees. The locking rod 450 and the locking hole 401 cooperate with each other.

[0045] Specifically, the recycling trough 51 is used to accommodate the drive motor 41 when adjusted to a horizontal position. The locking cylinder 40 is rotated by the bevel gear set 43, thereby driving the drive motor 41, the rotating shaft 30, and the upper first folding assembly 3 to adjust to a horizontal position. Furthermore, by providing a guide groove 46 on the mounting flange 42, and installing a locking rod 450 in conjunction with the telescopic motor 44 and the flexible rod 45, and by providing locking holes 401 spaced at 90-degree intervals on the locking post 400, when the locking rod 450 extends into the locking hole 401, the locking state of the locking cylinder 40 is locked; conversely, the locking of the locking cylinder 40 is released when it moves out of the locking hole.

[0046] Furthermore, such as Figure 2 , Figure 8 As shown, the paddle arm folding mechanism 5 includes a mounting frame 56 disposed on the edge of the frame 1. The end of the extension arm 50 is rotatably mounted between the mounting frame 56 and the mounting frame 56. A motor 55 is fixedly disposed on the mounting frame 56. The motor 55 is connected to a drive gear 54. The end edge of the extension arm 50 is provided with a mating external tooth 53, which meshes with the drive gear 54.

[0047] Specifically, after the blade 2 is adjusted to a horizontal position parallel to the extension arm 50, the extension arm 50 is swung by the motor 55 and the drive gear 54, causing the extension arm 50 and the blade 2 to come close to the edge of the frame 1, as shown in the following example. Figure 1 As shown.

[0048] Furthermore, such as Figure 2 , Figure 8 , Figure 9As shown, a misalignment mechanism 6 is provided on the inner side of the frame 1. The misalignment mechanism 6 is connected to the paddle arm folding mechanism 5. A lifting slide groove 10 is provided on the edge of the frame 1. A snap-fit ​​slider 57 is provided on the mounting frame 56. The mounting frame 56 is slidably installed between the snap-fit ​​slider 57 and the lifting slide groove 10. The misalignment mechanism 6 includes a first driving bevel gear 61 and a second driving bevel gear 63 rotatably installed inside the frame 1. A transmission pulley and a belt 62 are provided between the first driving bevel gear 61 and the second driving bevel gear 63. The first driving bevel gear 61 and the second driving bevel gear 63 are respectively meshed with a driven bevel gear 64. The driven bevel gear 64 is connected to a driving gear 65. A rack plate 60 is fixedly provided on the snap-fit ​​slider 57. The driving gear 65 and the rack plate 60 mesh with each other. The rack plate 60 is fixedly connected to the snap-fit ​​slider 57.

[0049] Specifically, such as Figure 1 As shown, in order to further improve the folding and recovery capability of the propeller 2 and reduce the overall space occupation of the folded drone, a lifting chute 10 is set on the edge of the frame 1. When the propeller 2 is folded and recovered to the edge of the frame 1, the first drive bevel gear 61 is controlled to rotate. Combined with the transmission pulley and belt 62, the second drive bevel gear 63 is driven to rotate synchronously, thereby driving the driven bevel gear 64 to rotate and transmitting power to the drive gear 65. The rotation of the drive gear 65 drives the adjacent mounting brackets 56 to rise and fall along the lifting chute 10, thereby staggering the height of the mounting brackets 56 on the edge of the frame 1, so that the folded and recovered propeller 2 is at different heights, thus providing more space for recovering all the propeller 2 and further reducing the space occupation rate of the folded drone.

[0050] The working principle of this invention embodiment is as follows:

[0051] like Figures 1-9As shown, when the propeller blades 2 of the UAV need to be folded and retracted, the first folding assembly 3 is used to adjust the propeller blades 2 to a vertical position, and then the second folding assembly 4 is used to adjust the propeller blades 2 to a horizontal position parallel to the extension arm 50. After adjustment, the flexible rod 45 and the locking rod 450 are used to lock the locking post 400, thereby locking the state of the propeller blades 2 relative to the extension arm 50. Then, the propeller arm folding mechanism 5 is used to adjust the propeller blades 2 and the extension arm 50 to be close to the edge of the frame 1. To further enhance the folding and retraction capability of the propeller 2 and reduce the overall space occupied by the folded drone, a lifting chute 10 is set at the edge of the frame 1. When the propeller 2 is folded and retracted to the edge of the frame 1, the first drive bevel gear 61 is controlled to rotate. Combined with the transmission pulley and belt 62, the second drive bevel gear 63 is driven to rotate synchronously, thereby driving the driven bevel gear 64 to rotate and transmitting power to the drive gear 65. The rotation of the drive gear 65 causes the adjacent mounting brackets 56 to rise and fall along the lifting chute 10, thereby staggering the height of the mounting brackets 56 at the edge of the frame 1. This allows the folded and retracted propeller 2 to be at different heights, thus providing more space for retrieving all the propeller 2 and further reducing the space occupied by the folded drone.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drive device for a folding propeller of an unmanned aerial vehicle, comprising a frame (1), wherein a plurality of extension arms (50) are circumferentially mounted on the frame (1), and blades (2) are mounted on the extension arms (50), characterized in that, The blades (2) on each set of the extension arms (50) are symmetrically arranged, a first folding assembly (3) is arranged between the blades (2), a second folding assembly (4) is arranged between the extension arm (50) and the first folding assembly (3), and a blade arm folding mechanism (5) is arranged between the extension arm (50) and the frame (1). The blade arm folding mechanism (5) drives the extension arm (50) to be close to the edge of the frame (1). The first folding assembly (3) includes a rotating shaft (30), on which an H-shaped frame (31) and a mounting block (32) are fixedly mounted. Lower clamping arms (36) are symmetrically mounted on both ends of the H-shaped frame (31), and snap-fit ​​arms (39) are provided on both ends of the mounting block (32). Arc-shaped frames (38) are symmetrically arranged on both sides of the snap-fit ​​arms (39), and an upper clamping arm (37) is slidably snapped between the arc-shaped frames (38). The blade (2) is fixedly mounted between the upper clamping arm (37) and the lower clamping arm (36). A first folding drive unit is provided between the lower clamping arm (36) and the H-shaped frame (31). The first folding drive unit drives the blade (2) to adjust from a horizontal state to a vertical state. The second folding assembly (4) includes a mounting flange (42) disposed at the end of the extension arm (50), a snap-fit ​​cylinder (40) is rotatably mounted on the mounting flange (42), a drive motor (41) is fixedly mounted at the bottom of the snap-fit ​​cylinder (40), the rotating shaft (30) is connected to the output shaft of the drive motor (41), and a second folding drive unit is disposed between the snap-fit ​​cylinder (40) and the mounting flange (42), the second folding drive unit drives the rotating shaft (30) to adjust from a vertical state to a horizontal state.

2. The drive device for a folding propeller of an unmanned aerial vehicle according to claim 1, characterized in that, The first folding drive unit includes an incomplete gear (310) disposed on the side of the H-shaped frame (31). The incomplete gears (310) are symmetrically arranged and mesh with each other. One of the incomplete gears (310) is connected to a power motor. A pulley (311) is coaxially mounted on the incomplete gear (310). A pulley (313) is coaxially mounted on the rotational connection axis between the lower clamping arm (36) and the H-shaped frame (31). A belt (312) is disposed between the pulley (311) and the pulley (313).

3. A drive device for a folding propeller of an unmanned aerial vehicle according to claim 2, characterized in that, A closed cover is provided between the H-shaped frame (31) and the first folding drive unit. The closed cover is symmetrically arranged on both sides of the H-shaped frame (31). An equivalent counterweight block that is centrally symmetrical with the first folding drive unit is provided inside the closed cover on the other side.

4. A drive device for a folding propeller of an unmanned aerial vehicle according to claim 3, characterized in that, The extension arm (50) is a telescopic structure. A lifting frame (34) is provided on the top of the mounting block (32). An electric telescopic column (33) is provided between the mounting block (32) and the lifting frame (34). Locking columns (35) are provided at both ends of the lifting frame (34). A mating hole is provided on the upper clamping arm (37) corresponding to the locking column (35). When the upper clamping arm (37) is in a horizontal state, the locking column (35) is directly opposite the mating hole.

5. A drive device for a folding propeller of an unmanned aerial vehicle according to claim 1, characterized in that, The second folding drive unit includes a recycling groove (51) disposed between the extension arms (50), a bevel gear set (43) disposed between the extension arms (50) and the mounting flange (42), and a locking post (400) disposed at both ends of the locking cylinder (40). The locking post (400) is rotatably mounted between the mounting flange (42), and the axial portion of the bevel gear set (43) is connected to the power motor and the locking post (400) respectively.

6. A drive device for a folding propeller of an unmanned aerial vehicle according to claim 5, characterized in that, A telescopic motor (44) is horizontally fixedly installed at the end of the extension arm (50). The telescopic motor (44) is connected to a flexible rod (45). A locking rod (450) is connected to the end of the flexible rod (45). A guide groove (46) is provided on the mounting flange (42). Two sets of locking holes (401) are provided on the snap-fit ​​post (400). The interval angle between the two sets of locking holes (401) is ninety degrees. The locking rod (450) and the locking hole (401) cooperate with each other.

7. A drive device for a folding propeller of an unmanned aerial vehicle according to claim 1, characterized in that, The paddle arm folding mechanism (5) includes a mounting frame (56) set on the edge of the frame (1). The end of the extension arm (50) is rotatably mounted between the mounting frame (56). A motor (55) is fixedly mounted on the mounting frame (56). The motor (55) is connected to a drive gear (54). The edge of the end of the extension arm (50) is provided with a mating external tooth (53). The mating external tooth (53) meshes with the drive gear (54).

8. A drive device for a folding propeller of an unmanned aerial vehicle according to claim 7, characterized in that, The frame (1) is provided with a misalignment mechanism (6) on its inner side. The misalignment mechanism (6) is connected to the paddle arm folding mechanism (5). The edge of the frame (1) is provided with a lifting slide groove (10). The mounting frame (56) is provided with a snap-fit ​​slider (57). The mounting frame (56) is slidably installed between the snap-fit ​​slider (57) and the lifting slide groove (10). The misalignment mechanism (6) includes a first drive bevel gear (61) and a second drive bevel gear (63) rotatably installed inside the frame (1). A transmission pulley and a second belt (62) are provided between the moving bevel gear (61) and the second driving bevel gear (63). The first driving bevel gear (61) and the second driving bevel gear (63) are respectively meshed with driven bevel gears (64). The driven bevel gears (64) are connected to driving gears (65). A rack plate (60) is fixedly provided on the snap-fit ​​slider (57). The driving gear (65) and the rack plate (60) mesh with each other. The rack plate (60) and the snap-fit ​​slider (57) are fixedly connected.

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