Unmanned helicopter transfer dragging wheel

Abstract

The utility model discloses an unmanned helicopter transfer dragging wheel which comprises two walking wheels, a connecting shaft is arranged between the two walking wheels, and the two ends of the connecting shaft are connected with a driven arm and a driving arm (8) respectively to achieve connection with the walking wheels. The connecting shaft is connected with a main beam through two bearings, a height adjusting control pin is arranged above the main beam (5), an airplane dragging wheel seat is connected below the main beam, a rack connecting pin is arranged below the airplane dragging wheel seat, and the rack connecting pin is connected with a rack; the lifting device has the advantages that the sled rod of the rack can be stably lifted, an additional fixing device for connecting an airplane dragging wheel device does not need to be additionally arranged on the rack, the weight of the rack is effectively reduced, and the effective load is improved.

Description

Technical Field

[0001] The utility model relates to the application field of UAV ground equipment, and particularly relates to a transfer trailer wheel for an unmanned helicopter. Background Art

[0002] During the assembly, transfer or maintenance of existing UAVs and light or small UAV frames, transfer operations are required. The landing gear of a skid-type UAV consists of two symmetrical skid rods. Since the two symmetrical skid rods cannot move by themselves, when conducting ground transfer transportation, professional trailer wheels are needed to lift the frame and then perform ground transfer operations.

[0003] Currently, the trailer wheels on the market have a relatively complex and heavy structure. When lifting, the height of the frame is adjusted by adjusting the worm and gear or manually rotating the screw, resulting in low operating efficiency. In case of emergency, it is difficult to transfer the UAV frame. In addition, some trailer wheels adopt a single walking wheel structure, which requires adding special mating parts on the frame, leading to a further increase in the weight of the frame and a reduction in the effective load. Moreover, this type of trailer wheel is relatively bulky and more difficult to carry during field operations. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a transfer trailer wheel for an unmanned helicopter. By utilizing the principle that during the rotation of the crank structure, the height of the crank pin from the ground is different at different crank positions, the purpose of lifting the UAV frame is achieved, thus avoiding a complex mechanism that uses a lead screw or worm and gear for rotation and simplifying the structure of the lifting device.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A transfer trailer wheel for an unmanned helicopter, including a frame and a trailer device, and its technical key points are:

[0006] The trailer device includes two walking wheels, a connecting shaft is arranged between the two walking wheels, and both ends of the connecting shaft are respectively connected to the driven arm and the driving arm to connect with the walking wheels;

[0007] The connecting shaft is connected to a main beam through two bearings, a height adjustment control pin is arranged above the main beam, a trailer wheel seat is connected below the main beam, and a frame connecting pin is arranged below the trailer wheel seat, and the frame connecting pin is connected to the frame.

[0008] Preferably, flat key structures are also arranged at both ends of the connecting shaft and are respectively connected to the driven arm and the driving arm; and internal threads are provided on the end face of the connecting shaft for connecting with the driving arm and the driven arm through bolts.

[0009] Preferably, the main body of the active arm is a fan-shaped structure, including a crowbar connection point arranged above it, a height rotation groove in the middle, and a support hole at the lower end. The crowbar connection point is used to connect the crowbar to drive the tractor wheel structure to jack up the frame up and down; the support hole is used to connect with the shaft of the walking wheel.

[0010] Preferably, there are two through holes on the driven arm for docking the connecting shaft and the walking wheel shaft.

[0011] Preferably, the main beam is fixed on the connecting shaft by one oil-free self-lubricating bearing on each of the left and right sides.

[0012] Preferably, there are two ear plates on the main beam for supporting the height of the height adjustment control pin, and there is a return spring on the height adjustment control pin.

[0013] Preferably, the lower end of the main beam is provided with a square tube-shaped structure for connecting the tractor wheel seat, and through holes are provided on the side wall. The through holes are used for inserting a wheel seat connection pin to fix the tractor wheel seat after it is connected to the main beam.

[0014] Preferably, the upper end of the tractor wheel seat is a square thin-walled square tube mouth structure, and its inner cavity is used to mate with the square tube of the main beam, and through holes are provided on the wall of the thin-walled square tube; the lower end of the tractor wheel seat is provided with two side plates, and the side plates and the square tube form a cavity for accommodating the sled rod, and a frame connection pin is provided in front and behind the cavity respectively.

[0015] The advantages and beneficial effects of the present utility model are as follows: The present utility model provides a transfer tractor wheel for an unmanned helicopter. The transfer tractor wheel adopts a double-walking-wheel structure, which can stably lift the sled rod of the frame, and there is no need to install an additional fixing device on the frame to connect the tractor wheel device, effectively reducing the weight of the frame and increasing the payload; at the same time, the towing wheel base is of an independent design and is connected to the main beam of the tractor wheel through a safety pin, which can achieve the connection of different UAV frames and the technical effect of dragging different UAV frames, reducing the number of special models and management costs. After use, it can be directly towed away without handling, with flexible transfer and improved maintainability of the whole machine. At the same time, each part of the parts is connected by bolts and pins, which is convenient for disassembly, maintenance or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the transfer tractor wheel;

[0017] Figure 2 It is a schematic diagram of the connection structure between the connecting shaft and the walking wheel;

[0018] Figure 3 It is a schematic diagram of the structure of the main beam of the tractor wheel and the connection structure of the height adjustment control pin;

[0019] Figure 4Schematic diagram of the tractor wheel seat structure;

[0020] The reference numerals are as follows: 1, frame connection pin; 2, tractor wheel seat; 3, traveling wheel; 4, driven arm; 5, main beam; 6, height adjustment control pin; 7, crowbar connection point; 8, driving arm; 9, wheel seat connection pin; 10, connecting shaft; 11, bearing. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution: an unmanned helicopter transfer tractor wheel, which uses the principle that the spatial position and projection distance of the crank of the crank mechanism are different to achieve the purpose of lifting the unmanned aircraft frame. The unmanned helicopter transfer tractor wheel protected by this device includes two traveling wheels 3. There is a crank mechanism between the two traveling wheels 3, and a related tractor device is provided. The tractor device includes a frame connection pin 1, a tractor wheel seat 2, a driven arm 4, a main beam 5, a height adjustment control pin 6, a crowbar connection point 7, a driving arm 8, and a wheel seat connection pin 9.

[0023] In this application, flat key structures are also provided at both ends of the connecting shaft 10 and are respectively connected to the driven arm 4 and the driving arm 8. And internal threads are provided on the end face of the connecting shaft 10, and the internal threads are connected to the driving arm 8 and the driven arm 4 at both ends through bolts.

[0024] In this application, the main beam 5 is installed on the connecting shaft 10 through two oil-free self-lubricating bearings 11 installed on the left and right of the connecting shaft 10. The main beam 5 is completely supported by the two bearings 11. The oil-free self-lubricating bearings 11 provided at both ends of the connecting shaft 10 can effectively reduce the resistance of the rotating driving arm 8 to lift the frame. Two ear plates for supporting the height adjustment pin 6 are provided on the main beam 5, and a return spring is provided on the height adjustment pin 6.

[0025] In this application, a structure for connecting the tractor wheel seat 2 is provided at the lower end of the main beam 5. This structure is square tube-shaped, and through holes are provided on the side wall. After connection, the wheel seat connection pin 9 is inserted for fixation.

[0026] In this application, the main body of the active arm 8 is a fan-shaped structure, which includes a crowbar connection point 7 arranged above, a height rotation groove in the middle, a hole for locking the height is opened on the inner end surface of the groove, which is used in pair with the height adjustment pin, and a support hole at the lower end of the active arm. The crowbar connection point 7 is used to connect the crowbar to drive the tractor wheel structure to jack up the frame up and down; the support hole is used to connect with the shaft of the walking wheel; the structure of the driven arm 4 includes two holes for connecting the mating connection shaft and the walking wheel shaft.

[0027] In this application, the upper end of the tractor wheel seat 2 is a square thin-walled square tube. The inner cavity of the square tube is used to mate with the square tube of the main beam 5, and through holes are arranged on the tube wall in pairs; two side plates are arranged at the lower end of the tractor wheel seat 2. The side plates and the square tube form a cavity for accommodating the sled rod, and two frame connection pin holes 1 are provided.

[0028] In this application, the towing wheel seat 2 is of an independent design and is connected to the tractor wheel main beam 5 through a safety pin. Different towing wheel seats can be selected and made according to different models of UAV frames.

[0029] In this application, the two walking wheels 3 are made of metal hubs equipped with maintenance-free rubber tires, which have high load-bearing capacity and the function of withstanding external impacts, and can realize the function of contacting the road surface and ensuring the driving performance.

[0030] An unmanned helicopter transfer tractor wheel protected by the present utility model utilizes the principle that during the rotation of the crank structure, the position of the crank is different and the height of the crank pin from the ground is different to achieve the purpose of lifting the UAV frame, thereby avoiding a complex mechanism using a lead screw or a worm and worm gear for rotation, and simplifying the structure of the lifting device.

[0031] The usage method is as follows:

[0032] During operation, keep the walking wheels stationary. After aligning the two mounting holes on the tractor wheel seat 2 with the two mounting holes on the sled base, insert the two frame connection pin holes 1 to prevent the tractor wheel from separating from the sled. The connection between the tractor wheel base 2 and the sled base is completely designed to match the shape of the sled rod. After being fixed with a pin, fast, accurate and reliable connection can be achieved. Then remove the safety pin from the safe position of the towing wheel, and then rotate the lever on the active arm 8 of the tractor wheel, so that the main beam 5 can move up and down. Finally, lift the entire sled base, and then insert the safety pin into the towing position of the tractor wheel to determine the height of the crank beam from the ground. The unmanned helicopter transfer tractor wheel can set the lifting height to at least two lifting heights to make it suitable for different environments, and ensure stable operation during driving while ensuring normal towing.

[0033] Meanwhile, the structure of double walking wheels is adopted, which can stably lift the sled rod of the frame without adding additional fixing devices to the frame, effectively reducing the weight of the frame and increasing the payload. Moreover, the pry bar is screwed tightly with the internal thread of the mounting hole. During operation, the pry bar is used to rotate the active arm, thereby driving the rapid lifting of the lifting device. The safety pin on the main beam is equipped with a return spring and will actively fall into the limit hole at the end position to ensure the reliable lifting height.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 communication of two elements or the interaction relationship between two elements. Unless otherwise clearly limited, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An unmanned helicopter transport tug wheel, comprising a frame and a tug device, characterized in that: The tractor device comprises two running wheels (3), a connecting shaft (10) is arranged between the two running wheels (3), and two ends of the connecting shaft (10) are respectively connected to the driven arm (4) and the driving arm (8) to realize connection with the running wheels (3); The connecting shaft (10) is connected to a main beam (5) via two bearings, a height adjustment control pin (6) is arranged above the main beam (5), a tractor wheel seat (2) is connected below the main beam (5), a frame connecting pin (1) is arranged below the tractor wheel seat (2), and the frame connecting pin (1) is connected to the frame.

2. The unmanned helicopter transport tug wheel according to claim 1, characterized in that: The two ends of the connecting shaft (10) are also provided with flat key structures, which are respectively connected to the driven arm (4) and the driving arm (8); and the end surface of the connecting shaft (10) is provided with an internal thread, which is used to connect with the driving arm (8) and the driven arm (4) through bolts.

3. The unmanned helicopter transport tug wheel according to claim 2, characterized in that: The main body of the active arm (8) is a fan-shaped structure, which includes a crowbar connection point (7) arranged at the top, a height rotation groove in the middle and a support hole at the bottom. The crowbar connection point is used to connect the crowbar to drive the tractor wheel structure to lift the frame up and down; the support hole is used to connect to the shaft of the walking wheel (3).

4. The unmanned helicopter transport tug wheel according to claim 2, characterized in that: The driven arm is provided with two through holes for butting the connecting shaft (10) and the shaft of the walking wheel (3).

5. The unmanned helicopter transport tug wheel according to claim 1, characterized in that: The main beam (5) is fixed on the connecting shaft (10) via an oil-free self-lubricating bearing on the left and right.

6. The unmanned helicopter transport tug wheel according to claim 5, characterized in that: The main beam (5) is provided with two ear plates supporting a height adjustment control pin (6), and the height adjustment control pin (6) is provided with a return spring.

7. The unmanned helicopter transport tug wheel according to claim 1, characterized in that: The lower end of the main beam (5) is provided with a square tube structure connected to the tractor wheel seat (2), and a through hole is provided on the side wall. The through hole is used to insert the wheel seat connecting pin (9) to fix the tractor wheel seat (2) after connecting with the main beam (5).

8. The unmanned helicopter transport tug wheel according to claim 7, characterized in that: The upper end of the tractor wheel seat (2) is a square thin-walled square tube mouth structure, the inner cavity of which is used to match the square tube of the main beam (5), and the tube wall of the thin-walled square tube is provided with a through hole; the lower end of the tractor wheel seat (2) is provided with two side plates, the side plates and the square tube constitute a cavity for accommodating the sled rod, and a frame connecting pin (1) is provided at the front and rear of the cavity.

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