Paddle limiting structure

Abstract

The paddle limiting structure comprises two cover plates and a connecting base, the two cover plates are arranged on the front end face and the rear end face of the connecting base correspondingly, a connecting through hole is formed in the middle of the connecting base, mounting columns are arranged at the front end and the rear end of the connecting base correspondingly, and placing holes are formed in the mounting columns; the position of the adjusting roller is pressed to drive the rotating block to rotate, then the connecting rod is driven to swing, the floating head can vertically slide along the unmanned aerial vehicle propeller rotating shaft along with swing of the connecting rod, and the stability of the propeller limiting structure is adjusted by adjusting the distance between the floating head and the connecting base; impact of centrifugal force is automatically adjusted in the using process of the propeller limiting structure, the buffering effect is achieved, the service life of the propeller limiting structure is prolonged, the blades are installed on the clamping base, the fourth connecting hole and the two third connecting holes are distributed in a triangular mode, and the blades are stable and firm after being locked through triangular distribution fixing.

Description

Technical Field

[0001] The invention relates to the technical field of unmanned aerial vehicles, and in particular to a blade limiting structure. Background Art

[0002] The propeller is one of the most important parts in the power system of a drone. During its high-speed rotation, the protection of the blades is crucial. During the high-speed rotation of existing propellers, since the hub and the propeller shaft are fixed, the centrifugal force generated has a large impact on the propeller shaft. The blades will hit the contact point between the hub and the shaft at high speed, which can easily cause the shaft to wear and damage.

[0003] Therefore, it is necessary to provide a blade limiting structure to solve the above technical problems. Summary of the invention

[0004] The object of the present invention is to provide a blade limiting structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a blade limiting structure, comprising a cover plate and a connecting seat, wherein two cover plates are provided, and the two cover plates are respectively arranged on the front and rear end surfaces of the connecting seat, a connecting through hole is opened in the middle of the connecting seat, and mounting columns are arranged at the front and rear ends of the connecting seat, and a placement hole is opened in the mounting column, and a limiting column is arranged in the placement hole, and the limiting column passes through the circumferential surface of the propeller shaft of the drone, and protrusions are arranged on both side walls of the connecting seat, and a floating adjustment mechanism is clamped on the protrusion, and connecting heads are arranged at both ends between the two cover plates, and the connecting head comprises a connecting part and a clamping part, and the clamping part is clamped between the two cover plates, and a clamping seat is clamped on the outer circumferential surface of the connecting part, and two connecting ears are arranged in parallel on the front side of the clamping seat, and a fixing block is clamped between the two connecting ears, and a second groove is opened at one end of the clamping seat away from the connecting ear, and two third connecting holes and a fourth connecting hole are opened on the clamping seat, and the fourth connecting hole and the two third connecting holes all pass through the second groove, and a blade is arranged in the second groove.

[0006] As a preferred technical solution of the present invention, a card hole is provided on the surface of the protrusion, and two first threaded holes are provided diagonally on the surface of the protrusion. The floating adjustment mechanism includes two connecting blocks, and the side walls of the connecting blocks are provided with guide heads. The two guide heads are respectively clamped in the card holes of the two protrusions. The side walls of the connecting blocks are provided with two fourth mounting holes diagonally, and the two fourth mounting holes are opened opposite to the two first threaded holes. Rotating blocks are rotatably provided in the two connecting blocks. The rotating block structure is L-shaped, and a roller is rotatably provided at the lower end of the rotating block, and a connecting rod is rotatably provided at the upper end of the rotating block. Rotating holes are provided at the upper and lower ends of the connecting rod, and floating heads are rotatably provided at the upper ends of the two connecting rods. A sliding hole is provided in the middle of the floating head, and the floating head is sleeved on the propeller shaft of the drone through the sliding hole. First card slots are provided at both ends of the bottom of the floating head, and the upper end of the connecting rod is movably clamped in the first card slot. The floating head is located directly above the connecting seat, and springs are respectively provided at the front and rear sides of the two connecting blocks and the two rotating blocks, and the two springs are respectively located on both sides of the rotating block.

[0007] As a preferred technical solution of the present invention, a first groove is provided on the side wall of the clamping part, two first connecting holes are provided on the front of the clamping part, the first connecting holes pass through the first groove, four first mounting holes are provided on the front of the cover plate, the four first mounting holes are respectively opposite to the first connecting holes of the two clamping parts, and the two connecting heads are locked between the two cover plates by bolts passing through the first mounting holes and the first connecting holes in sequence, and a connecting column is sleeved on the bolt.

[0008] As a preferred technical solution of the present invention, an arc-shaped groove is provided on the circumferential surface of the connecting column close to the floating head, and the arc-shaped groove is adapted to the arc-shaped surface shapes at both ends of the floating head.

[0009] As a preferred technical solution of the present invention, a clamping hole is provided on the side wall of the clamping seat, and the clamping hole cooperates with the connecting part to clamp and fix, and two second connecting holes are provided on the two connecting ears.

[0010] As a preferred technical solution of the present invention, a resistance portion is provided at one end of the fixed block, the end face of the resistance portion is arc-shaped, two fifth connecting holes are provided on the resistance portion, a second card slot is provided at the other end of the fixed block, a third mounting hole is provided on the side wall of the fixed block, and a bolt is inserted into the third mounting hole.

[0011] As a preferred technical solution of the present invention, a hole directly opposite to the fourth connection hole and the two third connection holes is opened on the blade, and the fourth connection hole and the two third connection holes are distributed in a triangle.

[0012] As a preferred technical solution of the present invention, a second mounting hole is provided on the front side of the cover plate, the mounting column passes through the second mounting hole, a movable clamp is sleeved on the mounting column, the movable clamp is clamped on the inner wall of the second mounting hole, a pressure ring is provided on the end face of the movable clamp, a limiting nut is sleeved on the end face of the limiting column, the limiting nut is pressed on the end face of the pressure ring, a through hole is provided on the outer circumferential surface of the limiting column, and a limiting clamp is inserted in the through hole.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention discloses a blade limiting structure. The present invention fixes and connects a connecting seat and a propeller shaft of a UAV by inserting a limiting column on the connecting seat and the two together. Floating adjustment mechanisms are arranged at both ends of the connecting seat to buffer the impact of centrifugal force on the propeller shaft when the blade rotates. The rotating block is driven to rotate by pressing and adjusting the roller position, and then the connecting rod is driven to swing. The floating head can slide up and down along the propeller shaft of the UAV as the connecting rod swings. The stability of the propeller limiting structure is adjusted by adjusting the distance change between the floating head and the connecting seat, so that the impact of centrifugal force can be automatically adjusted during use, so as to play a buffering role and extend the service life of the propeller limiting structure. The blade is installed on the base, and three bolts are respectively passed through the third connecting hole, the fourth connecting hole and the blade. The blade is fixed and locked in the second slot by nut locking. The fourth connecting hole and the two third connecting holes are distributed in a triangle. This distribution makes the blade stable and reliable after being locked. A fixing block is arranged on the front of the base, and the second slot is fixedly connected to the component installed on the propeller shaft, so that the base is further fixed, fixed stably and firmly, so that the rotation of the blade is more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a three-dimensional exploded schematic diagram of the overall structure of the present invention;

[0018] Figure 3 is a three-dimensional schematic diagram of the bump structure of the present invention;

[0019] Figure 4 It is a three-dimensional schematic diagram of the floating adjustment mechanism structure of the present invention;

[0020] Figure 5 It is a three-dimensional schematic diagram of the connector structure of the present invention;

[0021] Figure 6 It is a three-dimensional schematic diagram of the card holder structure of the present invention;

[0022] Figure 7 It is a three-dimensional schematic diagram of the fixed block structure of the present invention.

[0023] In the figure: 1, cover plate; 11, first mounting hole; 12, second mounting hole; 2, connecting seat; 21, connecting through hole; 22, convex block; 221, clamping hole; 222, first threaded hole; 23, mounting column; 231, placement hole; 3, floating adjustment mechanism; 31, connecting block; 311, guide head; 312, fourth mounting hole; 32, rotating block; 33, roller; 34, spring; 35, connecting rod; 36, floating head; 361, sliding hole; 362, first clamping slot; 4. Connecting head; 41. Connecting part; 42. Clamping part; 421. First slot; 422. First connecting hole; 5. Clamping seat; 51. Clamping hole; 52. Connecting ear; 521. Second connecting hole; 53. Second slot; 54. Third connecting hole; 55. Fourth connecting hole; 6. Fixing block; 61. Interference part; 611. Fifth connecting hole; 62. Second slot; 63. Third mounting hole; 7. Connecting column; 8. Movable clamping head; 9. Pressing ring; 10. Limiting column. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, in order to ensure the clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0025] In addition, the terms used below are defined based on the functions of the present invention and may differ depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0026] like Figure 1 to Figure 2 As shown, a blade limiting structure includes a cover plate 1 and a connecting seat 2, wherein two cover plates 1 are provided, and the two cover plates 1 are respectively arranged on the front and rear end surfaces of the connecting seat 2, a connecting through hole 21 is opened in the middle of the connecting seat 2, which is used for clamping with the propeller shaft of the unmanned aerial vehicle, and mounting columns 23 are provided at both the front and rear ends of the connecting seat 2, a placement hole 231 is opened in the mounting column 23, and a limiting column 10 is arranged in the placement hole 231, and the limiting column 10 passes through the circumferential surface of the propeller shaft of the unmanned aerial vehicle, thereby fixing the connecting seat 2 on the propeller shaft of the unmanned aerial vehicle, and protrusions 22 are provided on the two side walls of the connecting seat 2, and a clamping hole 221 is opened on the surface of the protrusion 22, and two first threaded holes 222 are opened diagonally on the surface of the protrusion 22, and a floating adjustment mechanism 3 is clamped on the protrusion 22.

[0027] like Figure 4As shown, the floating adjustment mechanism 3 includes two connecting blocks 31, and the side walls of the connecting blocks 31 are each provided with a guide head 311, and the two guide heads 311 are respectively clamped in the clamping holes 221 of the two protrusions 22, and two fourth mounting holes 312 are diagonally provided on the side walls of the connecting block 31, and the two fourth mounting holes 312 are directly opposite to the two first threaded holes 222. The connecting block 31 is locked on the protrusion 22 by passing a bolt through the fourth mounting hole 312 and screwing it into the first threaded hole 222. A rotating block 32 is rotatably provided in each of the two connecting blocks 31, and the rotating block 32 structure is L-shaped, and a roller 33 is rotatably provided at the lower end of the rotating block 32, and a connecting rod 35 is rotatably provided at the upper end of the rotating block 32, and a rotating hole is provided at both upper and lower ends of the connecting rod 35, and a floating head 36 is rotatably provided at the upper end of the two connecting rods 35, and a floating head 36 is provided in the middle of the floating head 36. There is a sliding hole 361, and the floating head 36 is sleeved on the propeller shaft of the drone through the sliding hole 361. The two ends of the bottom of the floating head 36 are provided with a first card slot 362, and the upper end of the connecting rod 35 is movably connected to the first card slot 362. The floating head 36 is located directly above the connecting seat 2. The two connecting blocks 31 and the two rotating blocks 32 are respectively provided with springs 34 at the front and back, and the two springs 34 are respectively located on both sides of the rotating block 32. The rotating block 32 is driven to rotate by pressing the position of the adjusting roller 33, and then the connecting rod 35 is driven to swing. The floating head 36 can slide up and down along the propeller shaft of the drone as the connecting rod 35 swings. The stability of the propeller limiting structure is adjusted by adjusting the distance change between the floating head 36 and the connecting seat 2, so that it can automatically adjust the impact of centrifugal force during use, play a buffering role, and extend the service life of the propeller limiting structure.

[0028] like Figures 5 to 7As shown, a connector 4 is provided at both ends between the two cover plates 1, and the connector 4 includes a connecting portion 41 and a clamping portion 42. The side wall of the clamping portion 42 is provided with a first slot 421, and the front of the clamping portion 42 is provided with two first connecting holes 422, and the first connecting holes 422 penetrate the first slot 421. The front of the cover plate 1 is provided with four first mounting holes 11, and the four first mounting holes 11 are respectively opposite to the first connecting holes 422 of the two clamping portions 42, and the two connectors 4 are locked on the two cover plates 1 by bolts that penetrate the first mounting holes 11 and the first connecting holes 422 in sequence. A connecting column 7 is sleeved on the bolt, and an arc-shaped groove is provided on the circumferential surface of the connecting column 7 close to the floating head 36, which is used to slide with the arc surfaces at both ends of the floating head 36. A clamping seat 5 is clamped on the outer circumferential surface of the connecting portion 41, and a clamping hole 51 is provided on the side wall of the clamping seat 5. The clamping hole 51 is used to clamp and fix with the connecting portion 41. Two connecting ears 52 are provided in parallel on the front of the clamping seat 5. Two second connecting holes 521 are provided on the two connecting ears 52. A fixing block 6 is clamped between the two connecting ears 52. A resistance portion 61 is provided at one end of the fixing block 6. The resistance portion 6 The end surface of the fixing block 6 is arc-shaped, and two fifth connection holes 611 are provided on the abutment portion 61. The bolts pass through the second connection hole 521 and the fifth connection hole 611 in sequence and are then locked by nuts, thereby locking the fixing block 6 on the base 5. The other end of the fixing block 6 is provided with a second slot 62, and the side wall of the fixing block 6 is provided with a third mounting hole 63. The third mounting hole 63 is plugged with a bolt. The fixing block 6 is fixedly connected to the component installed on the propeller shaft through the second slot 62, thereby further fixing the base 5, and the fixing is stable and firm. The end of the base 5 away from the connecting ear 52 is provided with a second slot 53 The holder 5 is provided with two third connection holes 54 and a fourth connection hole 55, and the fourth connection hole 55 and the two third connection holes 54 all penetrate the second slot 53, and a blade is arranged in the second slot 53. The blade is provided with a hole that is opposite to the fourth connection hole 55 and the two third connection holes 54, and three bolts pass through the third connection hole 54, the fourth connection hole 55 and the blade respectively, and the blade is fixed and locked in the second slot 53 by tightening the nut. The fourth connection hole 55 and the two third connection holes 54 are distributed in a triangle, and this distribution makes the blade firm and reliable after being locked.

[0029] like Figure 2 As shown, the cover plate 1 is provided with a second mounting hole 12 on the front side, the mounting column 23 passes through the second mounting hole 12, a movable clamp 8 is sleeved on the mounting column 23, the movable clamp 8 is clamped on the inner wall of the second mounting hole 12, a pressing ring 9 is provided on the end face of the movable clamp 8, a limiting nut is sleeved on the end face of the limiting column 10, the limiting nut is pressed on the end face of the pressing ring 9, a through hole is provided on the outer circumferential surface of the limiting column 10, and a limiting clamp is inserted in the through hole to limit the limiting nut.

[0030] The specific implementation method is as follows: by inserting the limiting column 10 on the connecting seat 2 and the propeller shaft of the drone, the two are fixedly connected together, and floating adjustment mechanisms 3 are set at both ends of the connecting seat 2 to buffer the impact of the centrifugal force on the propeller shaft when the blades rotate. By pressing the position of the adjusting roller 33, the rotating block 32 is driven to rotate, and then the connecting rod 35 is driven to swing. The floating head 36 can slide up and down along the propeller shaft of the drone as the connecting rod 35 swings. The stability of the propeller limiting structure is adjusted by adjusting the distance between the floating head 36 and the connecting seat 2, so that it can automatically adjust the impact of the centrifugal force during use. The impact plays a buffering role and prolongs the service life of the propeller limiting structure. The blade is installed on the base 5. Three bolts are respectively passed through the third connecting hole 54 and the fourth connecting hole 55 and the blade. The blade is fixed and locked in the second slot 53 by tightening the nut. The fourth connecting hole 55 and the two third connecting holes 54 are distributed in a triangle. This distribution makes the blade stable and reliable after being locked. A fixing block 6 is set on the front side of the base 5, which is fixedly connected to the component installed on the propeller shaft through the second slot 62, so as to further fix the base 5, stabilize and firmly, so that the rotation of the blade is more stable and reliable.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A blade limiting structure, comprising a cover plate (1) and a connecting seat (2), wherein two cover plates (1) are provided, and the two cover plates (1) are respectively provided on the front and rear end surfaces of the connecting seat (2), characterized in that: A connecting through hole (21) is provided in the middle of the connecting seat (2), and mounting columns (23) are provided at both the front and rear ends of the connecting seat (2), and a placement hole (231) is provided in the mounting column (23), and a limiting column (10) is provided in the placement hole (231), and the limiting column (10) passes through the circumferential surface of the propeller shaft of the drone, and convex blocks (22) are provided on both side walls of the connecting seat (2), and a floating adjustment mechanism (3) is clamped on the convex blocks (22), and connecting heads (4) are provided at both ends between the two cover plates (1), and the connecting head (4) includes a connecting portion (41) and a clamping portion (42). The clamping portion (42) is clamped between the two cover plates (1); a clamping seat (5) is clamped on the outer circumferential surface of the connecting portion (41); two connecting ears (52) are arranged in parallel on the front of the clamping seat (5); a fixing block (6) is clamped between the two connecting ears (52); a second groove (53) is provided at one end of the clamping seat (5) away from the connecting ears (52); two third connecting holes (54) and a fourth connecting hole (55) are provided on the clamping seat (5); the fourth connecting hole (55) and the two third connecting holes (54) all pass through the second groove (53); and a paddle is provided in the second groove (53).

2. A blade limiting structure according to claim 1, characterized in that: The surface of the protrusion (22) is provided with a clamping hole (221), and the surface of the protrusion (22) is provided with two first threaded holes (222) at opposite corners. The floating adjustment mechanism (3) comprises two connecting blocks (31), and the side walls of the connecting blocks (31) are provided with guide heads (311), and the two guide heads (311) are respectively clamped in the clamping holes (221) of the two protrusions (22). The side walls of the connecting blocks (31) are provided with two fourth mounting holes (312) at opposite corners, and the two fourth mounting holes (312) are provided opposite to the two first threaded holes (222). Rotating blocks (32) are rotatably provided in the two connecting blocks (31), and the rotating blocks (32) are L-shaped in structure. A roller (33) is rotatably provided at the lower end of the rotating blocks (32). A connecting rod (35) is rotatably provided at the upper end of the rotating block (32), and rotating holes are provided at both upper and lower ends of the connecting rod (35). A floating head (36) is rotatably provided at the upper ends of the two connecting rods (35), and a sliding hole (361) is provided in the middle of the floating head (36). The floating head (36) is sleeved on the propeller shaft of the drone through the sliding hole (361). First slots (362) are provided at both ends of the bottom of the floating head (36), and the upper end of the connecting rod (35) is movably connected to the first slot (362). The floating head (36) is located directly above the connecting seat (2). Springs (34) are respectively provided at the front and rear ends of the two connecting blocks (31) and the two rotating blocks (32), and the two springs (34) are respectively located at both sides of the rotating block (32).

3. A blade limiting structure according to claim 1, characterized in that: The side wall of the clamping portion (42) is provided with a first slot (421), the front of the clamping portion (42) is provided with two first connection holes (422), the first connection holes (422) pass through the first slot (421), the front of the cover plate (1) is provided with four first mounting holes (11), the four first mounting holes (11) are respectively opposite to the first connection holes (422) of the two clamping portions (42), and the two connectors (4) are locked between the two cover plates (1) by bolts that pass through the first mounting holes (11) and the first connection holes (422) in sequence, and the bolts are sleeved with connection columns (7).

4. A blade limiting structure according to claim 3, characterized in that: An arc-shaped groove is provided on the circumferential surface of the connecting column (7) close to the floating head (36), and the arc-shaped groove is adapted to the arc-shaped surface shapes at both ends of the floating head (36).

5. The blade limiting structure according to claim 1, characterized in that: The side wall of the clamping seat (5) is provided with a clamping hole (51), and the clamping hole (51) is clamped and fixed with the connecting portion (41), and two second connecting holes (521) are provided on the two connecting ears (52).

6. The blade limiting structure according to claim 1, characterized in that: A contact portion (61) is provided at one end of the fixing block (6), the end surface of the contact portion (61) is arc-shaped, two fifth connection holes (611) are provided on the contact portion (61), a second clamping groove (62) is provided at the other end of the fixing block (6), a third mounting hole (63) is provided on the side wall of the fixing block (6), and a bolt is inserted into the third mounting hole (63).

7. The blade limiting structure according to claim 1, characterized in that: The blade is provided with a hole directly opposite to the fourth connection hole (55) and the two third connection holes (54); the fourth connection hole (55) and the two third connection holes (54) are distributed in a triangular shape.

8. The blade limiting structure according to claim 1, characterized in that: The cover plate (1) is provided with a second mounting hole (12) on the front side, the mounting column (23) passes through the second mounting hole (12), a movable clamp (8) is sleeved on the mounting column (23), the movable clamp (8) is clamped on the inner wall of the second mounting hole (12), a pressing ring (9) is provided on the end face of the movable clamp (8), a limiting nut is sleeved on the end face of the limiting column (10), the limiting nut is pressed against the end face of the pressing ring (9), a through hole is provided on the outer circumferential surface of the limiting column (10), and a limiting clamp is inserted into the through hole.

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