Wheel-driven unmanned aerial vehicle

Abstract

The utility model is suitable for the technical field of unmanned aerial vehicle structures, and provides a wheel-driven unmanned aerial vehicle which comprises a hollow device frame and a plurality of driving shaft mechanisms. According to the wheel-driven unmanned aerial vehicle, the driving shaft mechanism is arranged, the unmanned aerial vehicle is provided with the spiral blades and the driving wheels at the bottom, shaft structures of the spiral blades and the driving wheels of the device extend into the device frame, and during actual use, in a normal state, a power shaft in the driving shaft mechanism can be kept in a horizontal state; when the unmanned aerial vehicle needs to move on the road surface, an electric control telescopic rod can be controlled to extend to drive a power shaft to incline downwards until the driving gear is meshed with a second driven gear, and at the moment, the power shaft rotates to drive a driving wheel to move; the two moving structures of the unmanned aerial vehicle are controlled through one power system, the overall weight of the unmanned aerial vehicle cannot be increased, and the flight efficiency of the unmanned aerial vehicle cannot be affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicle structures, and in particular relates to a wheel-driven unmanned aerial vehicle. Background Art

[0002] Unmanned aerial vehicles, or UAVs for short, are unmanned aircraft that are controlled by radio remote control equipment and self-contained program control devices, or are operated completely or intermittently autonomously by onboard computers. Compared with manned aircraft, drones are often more suitable for tasks that are too "dull, dirty or dangerous". Drones can be divided into military and civilian applications according to their application areas. In the military, drones are divided into reconnaissance aircraft and target aircraft. In the civilian sector, drones + industry applications are the real rigid demand for drones; their applications in aerial photography, agriculture, plant protection, micro selfies, express delivery, disaster relief, wildlife observation, infectious disease monitoring, surveying and mapping, news reporting, power inspections, disaster relief, film and television shooting, creating romance, etc., have greatly expanded the uses of drones themselves.

[0003] With the popularity of drones, ordinary people can also buy drones for use, and some people even buy drones as toys to play with. However, the current drone structure can only fly. When the position of the drone needs to be adjusted, it must be controlled to take off and then land, which is inconvenient. Although some drones are also equipped with tires at the bottom to drive the drone to move on the road, such drones often use two sets of power structures to control the rotation of the tires and propellers respectively, which will increase the overall weight of the drone and reduce its flight efficiency. Utility Model Content

[0004] The utility model provides a wheel-driven UAV, aiming to solve the problem that some UAVs are also provided with tires at their bottom to drive the UAV to move on the road, but such UAVs often use two sets of power structures to control the rotation of the tires and propellers respectively, which will increase the overall weight of the UAV and reduce its flight efficiency.

[0005] The utility model is implemented as follows: a wheel-driven UAV includes an internally hollow device frame and a plurality of drive shaft mechanisms;

[0006] The device frame is fixedly connected with a mounting frame inside, the mounting frame is laterally rotatably connected with a rotating shaft inside, and the plurality of driving shaft mechanisms are respectively arranged at both ends of the rotating shaft;

[0007] The structures of multiple drive shaft mechanisms are the same, one of which includes a first cardan shaft fixedly connected to one end of the rotating shaft, the output end of the first cardan shaft fixedly connected to a power shaft, the other end of the power shaft fixedly connected to a driving gear, the top of the device frame is fixedly connected to a fixing seat, the bottom end of the fixing seat is rotatably connected to an electric-controlled telescopic rod, the bottom end of the electric-controlled telescopic rod is fixedly connected to an inverted U-shaped connecting block, the interior of the connecting block is laterally rotatably connected to a connecting ring, and the power shaft is rotatably connected to the inner ring surface of the connecting ring.

[0008] Preferably, the outer surface of the device frame is laterally fixedly connected with a plurality of extension seats which are hollow inside and communicate with the inner cavity of the device frame and respectively correspond to the plurality of driving shaft mechanisms; the interiors of the plurality of extension seats are laterally rotationally connected with driven shafts whose inner ends extend into the interior of the device frame; the inner ends of the plurality of driven shafts are fixedly connected with a first driven gear.

[0009] Preferably, the outer ends of the multiple driven shafts are fixedly connected to the driving bevel gears, the other ends of the multiple extension seat inner cavities are vertically rotatably connected to the blade shafts, the outer surfaces of the multiple blade shafts are respectively fixedly connected to the driven bevel gears respectively meshing with the multiple driving bevel gears, the top ends of the multiple blade shafts rotatably pass through the upper surface of the extension seat and extend upward, and the outer surfaces of the multiple blade shafts and located outside the extension seat are fixedly connected with spiral blades.

[0010] Preferably, a plurality of fixing sleeves corresponding to the plurality of driving shaft mechanisms are fixedly connected to the lower portion of the inner cavity of the device frame, the interiors of the plurality of fixing sleeves are rotatably connected with inclined oblique shafts, the top ends of the plurality of oblique shafts are fixedly connected with a second driven gear, the bottom ends of the plurality of oblique shafts are fixedly connected with a second universal shaft, the output ends of the plurality of second universal shafts are transversely fixedly connected with axles, and the plurality of axles can rotatably pass through the side surface of the device frame and extend outward.

[0011] Preferably, the outer ends of the plurality of wheel axles are fixedly connected with drive wheels.

[0012] Preferably, a driven pulley is fixedly connected to the outer surface of the rotating shaft.

[0013] Beneficial Effects

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: a wheel-driven UAV of the utility model is provided with a driving shaft mechanism, and the UAV is provided with a driving wheel at the bottom in addition to the spiral blades, and the shaft structures of the spiral blades and the driving wheel of the device extend to the inside of the device frame. In actual use, under normal conditions, the power shaft in the driving shaft mechanism will remain in a horizontal state, and the driving gear will mesh with the first driven gear, thereby driving the spiral blade to rotate. At this time, the UAV is in flight mode, and when the UAV needs to move on the road, the electric-controlled telescopic rod can be controlled to extend to drive the power shaft to tilt downward until the driving gear meshes with the second driven gear. At this time, the rotation of the power shaft will drive the driving wheel to move, and the UAV is in road mode. The two sets of motion structures of the UAV are controlled by a power system, which will not increase the overall weight of the UAV, and will not affect the flight efficiency of the UAV. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the flight mode state structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the road surface mode state structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the extension seat in the utility model.

[0018] In the figure: 1-device frame, 2-mounting frame, 3+rotating shaft, 4-driven pulley, 5-first cardan shaft, 6-power shaft, 7-driving gear, 8-extension seat, 9-driven shaft, 10-first driven gear, 11-fixed sleeve, 12-oblique shaft, 13-second driven gear, 14-second cardan shaft, 15-axle, 16-driving wheel, 17-fixed seat, 18-electrically controlled telescopic rod, 19-connecting block, 20-connecting collar, 21-driving bevel gear, 22-blade shaft, 23-driven bevel gear, 24-spiral blade. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] See also Figure 1-3 , the utility model provides a technical solution: a wheel-driven UAV, comprising an internally hollow device frame 1 and a plurality of drive shaft mechanisms;

[0021] The inside of the device frame 1 is fixedly connected with a mounting frame 2, the inside of the mounting frame 2 is laterally rotatably connected with a rotating shaft 3, and a plurality of driving shaft mechanisms are respectively arranged at both ends of the rotating shaft 3;

[0022] The structures of multiple drive shaft mechanisms are all the same, and one of the drive shaft mechanisms includes a first cardan shaft 5 fixedly connected to one end of the rotating shaft 3, the output end of the first cardan shaft 5 is fixedly connected to the power shaft 6, the other end of the power shaft 6 is fixedly connected to the driving gear 7, the top of the device frame 1 is fixedly connected to the fixing seat 17, the bottom end of the fixing seat 17 is rotatably connected to the electric control telescopic rod 18, the bottom end of the electric control telescopic rod 18 is fixedly connected to the inverted U-shaped connecting block 19, the inside of the connecting block 19 is laterally rotatably connected to the connecting ring 20, and the power shaft 6 is rotatably connected to the inner ring surface of the connecting ring 20.

[0023] In this embodiment, when the rotating shaft 3 of the device rotates, it can drive the power shaft 6 to rotate through the first universal shaft 5. Since the power shaft 6 is connected to the rotating shaft 3 through the first universal shaft 5, it can swing in the vertical direction, and can freely change the position of its other end. When the position needs to be changed, it can be done by controlling the extension or shortening of the electric-controlled telescopic rod 18. When the electric-controlled locking screw 18 is extended, it can drive the power shaft 9 to move downward, otherwise it will move upward.

[0024] Furthermore, the outer surface of the device frame 1 is laterally fixedly connected with a plurality of extension seats 8 which are hollow inside and communicate with the inner cavity of the device frame 1 and correspond to the plurality of driving shaft mechanisms respectively. The interiors of the plurality of extension seats 8 are laterally rotationally connected with driven shafts 9 whose inner ends extend into the interior of the device frame 1. The inner ends of the plurality of driven shafts 9 are fixedly connected with a first driven gear 10.

[0025] The outer ends of the multiple driven shafts 9 are fixedly connected to the driving bevel gears 21, the other ends of the inner cavities of the multiple extension seats 8 are vertically rotatably connected to the fan blade shafts 22, the outer surfaces of the multiple fan blade shafts 22 are respectively fixedly connected to the driven bevel gears 23 that are respectively meshed with the multiple driving bevel gears 21, the top ends of the multiple fan blade shafts 22 are rotatably passed through the upper surface of the extension seat 8 and extend upward, and the outer surfaces of the multiple fan blade shafts 22 and located outside the extension seat 8 are fixedly connected with spiral blades 24.

[0026] In this embodiment, when it is necessary to drive the spiral blades 24 of the device to rotate, the electrically-controlled telescopic rod 18 will be in the shortest state, at which time the entire power shaft 6 will remain in a horizontal state, and the driving gear 7 will also engage with the first driven gear 10. Driven by the rotation of the power shaft 6, the driven shaft 9 will also rotate, thereby driving the fan blade shaft 22 to rotate through the driving bevel gear 21, thereby driving the spiral blades 24 of the device to rotate.

[0027] Since the power shaft 6 is in a horizontal state in this state, the first cardan shaft 5 will not affect the normal rotation of the power shaft 6, and the power shaft 6 will not have differential rotation.

[0028] Furthermore, a plurality of fixed sleeves 11 corresponding to the plurality of driving shaft mechanisms are fixedly connected to the lower portion of the inner cavity of the device frame 1, and the interiors of the plurality of fixed sleeves 11 are rotatably connected to inclined oblique shafts 12, the top ends of the plurality of oblique shafts 12 are fixedly connected to second driven gears 13, the bottom ends of the plurality of oblique shafts 12 are fixedly connected to second universal shafts 14, and the output ends of the plurality of second universal shafts 14 are transversely fixedly connected to wheel axles 15, and the plurality of wheel axles 15 can rotatably pass through the side surface of the device frame 1 and extend outward.

[0029] The outer ends of the plurality of wheel axles 15 are all fixedly connected with driving wheels 16 .

[0030] In this embodiment, when it is necessary to drive the driving wheel 16 of the device to move, the electrically controlled telescopic rod 18 is extended to its longest state. At this time, the entire power shaft 6 is tilted, and the driving gear 7 is engaged with the second driven gear 13. Driven by the rotation of the power shaft 6, the oblique shaft 12 is rotated, thereby driving the wheel axle 15 and the driving wheel 16 to rotate through the second universal shaft 14.

[0031] In this state, since the power shaft 6 is tilted, differential rotation will occur. However, since the oblique shaft 12 and the wheel axle 15 are connected via the second universal shaft 14, the differential rotation can be offset to ensure the stable operation of the device.

[0032] Furthermore, a driven pulley 4 is fixedly connected to the outer surface of the rotating shaft 3 .

[0033] In this embodiment, the main output device of the device is an electric motor. A driving pulley is installed on the output shaft of the motor and a belt is used to connect it to the driven pulley 4, thereby driving the rotating shaft 3 of the device to rotate.

[0034] Working principle and use process of the utility model: After the utility model is installed, the drone is provided with a driving wheel at the bottom in addition to the spiral blades, and the shaft structures of the spiral blades 24 and the driving wheel 16 of the device extend to the inside of the device frame 1. In actual use, under normal conditions, the power shaft 6 in the driving shaft mechanism will remain in a horizontal state. At this time, the driving gear 7 will mesh with the first driven gear 10, thereby driving the spiral blade 24 to rotate. At this time, the drone is in flight mode. When the drone needs to move on the road, the electric-controlled telescopic rod 18 can be controlled to extend and drive the power shaft 6 to tilt downward until the driving gear 7 meshes with the second driven gear 13. At this time, the rotation of the power shaft 6 will drive the driving wheel 16 to move. At this time, the drone is in road mode. The two sets of motion structures of the drone are controlled by a power system, which will not increase the overall weight of the drone, and will not affect the flight efficiency of the drone.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel-driven UAV, characterized in that: It comprises a hollow device frame (1) and a plurality of drive shaft mechanisms; The device frame (1) is fixedly connected to a mounting frame (2) inside, the mounting frame (2) is laterally rotatably connected to a rotating shaft (3) inside, and a plurality of driving shaft mechanisms are respectively arranged at both ends of the rotating shaft (3); The structures of the plurality of drive shaft mechanisms are all the same, wherein one of the drive shaft mechanisms comprises a first universal joint (5) fixedly connected to one end of the rotating shaft (3), the output end of the first universal joint (5) being fixedly connected to a power shaft (6), the other end of the power shaft (6) being fixedly connected to a driving gear (7), the top end of the interior of the device frame (1) being fixedly connected to a fixing seat (17), the bottom end of the fixing seat (17) being rotatably connected to an electric control telescopic rod (18), the bottom end of the electric control telescopic rod (18) being fixedly connected to an inverted U-shaped connecting block (19), the interior of the connecting block (19) being rotatably connected to a connecting collar (20), and the power shaft (6) being rotatably connected to the inner ring surface of the connecting collar (20).

2. A wheel-driven UAV as claimed in claim 1, characterized in that: The outer surface of the device frame (1) is laterally fixedly connected with a plurality of extension seats (8) which are hollow inside and communicate with the inner cavity of the device frame (1) and correspond to the plurality of driving shaft mechanisms respectively; the interiors of the plurality of extension seats (8) are laterally rotatably connected with driven shafts (9) whose inner ends extend into the interior of the device frame (1); the inner ends of the plurality of driven shafts (9) are fixedly connected with a first driven gear (10).

3. A wheel-driven UAV as claimed in claim 2, characterized in that: The outer ends of the plurality of driven shafts (9) are fixedly connected to driving bevel gears (21), the other ends of the inner cavities of the plurality of extension seats (8) are vertically rotatably connected to blade shafts (22), the outer surfaces of the plurality of blade shafts (22) are respectively fixedly connected to driven bevel gears (23) respectively meshing with the plurality of driving bevel gears (21), the top ends of the plurality of blade shafts (22) are rotatably passed through the upper surface of the extension seat (8) and extend upward, and the outer surfaces of the plurality of blade shafts (22) and located outside the extension seat (8) are fixedly connected to spiral blades (24).

4. A wheel-driven UAV as claimed in claim 1, characterized in that: A plurality of fixed sleeves (11) corresponding to the plurality of drive shaft mechanisms are fixedly connected to the lower part of the inner cavity of the device frame (1), and the interiors of the plurality of fixed sleeves (11) are rotatably connected to inclined oblique shafts (12), the top ends of the plurality of oblique shafts (12) are fixedly connected to a second driven gear (13), the bottom ends of the plurality of oblique shafts (12) are fixedly connected to a second universal shaft (14), and the output ends of the plurality of second universal shafts (14) are transversely fixedly connected to a wheel axle (15), and the plurality of wheel axles (15) can rotatably penetrate the side surface of the device frame (1) and extend outward.

5. A wheel-driven UAV as claimed in claim 4, characterized in that: The outer ends of the plurality of wheel axles (15) are all fixedly connected with driving wheels (16).

6. The wheel-driven UAV according to claim 1, characterized in that: A driven pulley (4) is fixedly connected to the outer surface of the rotating shaft (3).

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