Light aircraft wireless remote control tractor

Abstract

The utility model discloses a light aircraft wireless remote control tractor. The light aircraft wireless remote control tractor comprises a tractor frame, a crawler belt assembly and a wheel locking assembly. A rotating disc connecting plate connected to the frame is arranged at the bottom of the wheel locking assembly, a return rotating disc is rotationally connected to the top of the rotating disc connecting plate, a supporting plate is further arranged on one side of the return rotating disc, and a magnetic attraction locker and a limiting plate are arranged at the folded end of the supporting plate. Lug seats are symmetrically arranged on the upper surface of the return turntable, side connecting plates are hinged to the lug seats, end connecting plates are arranged at the ends, close to the magnetic attraction locking devices, of the side connecting plates, a plurality of upper wheel movable rotating shafts are arranged at the other ends of the side connecting plates, and first grooves used for rotation of the side connecting plates are formed between the lug seats. A power system and a control system are arranged in the frame, and the power system and the switch are electrically connected to the control system. The tractor can turn around in situ within a short time, so that the transfer efficiency is improved; and the damage to the front wheel of the airplane is avoided in design, and the later maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation, in particular to a wireless remote-controlled tractor for light aircraft. Background Art

[0002] An aircraft tug is a type of support equipment used to tow aircraft on the airport ground. It is mainly used to tow aircraft to and from places such as aprons, aircraft hangars and maintenance workshops.

[0003] Currently, aircraft tractors are divided into two types: towbar tractors and towbarless tractors. A Chinese utility model patent (CN204399488U) discloses a remote-controlled towbarless aircraft tractor, comprising a frame and front and rear wheel assemblies disposed at the front and rear ends of the frame. The frame is equipped with a remotely controlled power system that provides the aircraft tractor with power. A towing opening is defined at the rear end of the frame. A shovel holder is provided on the frame, corresponding to the towing opening, for tightening the aircraft's nose landing gear wheels. The shovel holder is connected to a hydraulic cylinder within the frame that drives the shovel holder forward and backward. A gripper is provided within the towing opening to tighten the aircraft's nose landing gear wheels. A hydraulic system is provided within the frame to control all hydraulic cylinders, also controlled by remote control. Hydraulic lifting devices are provided on the rear and front wheel assemblies to raise and lower the rear and front wheel assemblies. This invention provides an aircraft tractor that eliminates the need for a cab and independent clamping and lifting mechanisms, utilizes wireless remote control, and features a compact structure, a small turning radius, and multiple steering modes, making it suitable for use in confined spaces.

[0004] However, when actually used to tow a light aircraft, the remote-controlled rodless aircraft tractor provided by the utility model cannot achieve a short-distance on-the-spot U-turn. In addition, there are problems such as the complicated process of driving the shovel with the hydraulic cylinder, damage to the aircraft's front landing gear wheels by the claws, and difficulty in subsequent maintenance of the hydraulic system. Utility Model Content

[0005] The utility model provides a wireless remote-controlled tractor for light aircraft, thereby solving the technical problems of short-distance on-the-spot U-turn during towing a light aircraft, damage to the front landing gear wheels of the aircraft during towing a light aircraft, and difficulty in maintaining the tractor.

[0006] The utility model provides a wireless remote-controlled tractor for light aircraft, comprising a frame, a track assembly symmetrically arranged on the outside of the frame, and a locking wheel assembly, wherein the locking wheel assembly is arranged between the track assemblies. A turntable connecting plate connected to the frame is provided at the bottom of the locking wheel assembly, and the top of the turntable connecting plate is rotatably connected to a return turntable. A support plate is also provided on one side of the return turntable, and one end of the support plate is folded toward the top of the return turntable. A magnetic lock and a limit plate are provided at the folded end of the support plate. The limit plate is provided with a switch, and the switch is electrically connected to the magnetic lock. Ear seats are symmetrically provided on the upper surface of the return turntable, and the ear seats are hinged with side connecting plates. An end connecting plate is provided at one end of the side connecting plate near the magnetic lock, and a plurality of upper wheel movable shafts are provided at the other end of the side connecting plate. A first groove for the rotation of the side connecting plate is provided between the ear seats. A power system and a control system are provided inside the frame, and the power system and the switch are both electrically connected to the control system.

[0007] In a possible implementation, a second groove is provided on the side connecting plate near the first groove, and the second groove is arranged in a triangular shape.

[0008] In a possible implementation, an elastic member is provided between the return turntable and the side connecting plate.

[0009] In one possible implementation, the power system includes a motor symmetrically arranged on the inner side of the frame, the motor is electrically connected to a power source, and the power source is arranged between the motor and the lock wheel assembly.

[0010] In a possible implementation, the track assembly includes an active transmission wheel connected to the motor, a speed reducer is provided between the active transmission wheel and the motor, and the active transmission wheel is provided on the outside of the vehicle frame.

[0011] In a possible implementation, driven wheels and auxiliary guide wheels are provided on both sides of the vehicle frame, and the active transmission wheel, the driven wheel and the auxiliary guide wheel are all meshedly connected with tracks.

[0012] In a possible implementation, the control system includes an electric control board and a manual control board connected to the vehicle frame, and both the electric control board and the manual control board are electrically connected to the motor.

[0013] The technical solution provided in this utility model has at least the following technical effects:

[0014] This utility model provides a wireless remote-controlled tractor for light aircraft. By incorporating a return turntable and tracks, the aircraft can be quickly turned around, reducing time lost during the towing process and improving transfer efficiency. The locking wheel assembly's upper wheel movable shaft, side connecting plates, and magnetic lock prevent damage to the aircraft's front wheels. The tractor's use of an electric powertrain and wireless remote control system reduces subsequent maintenance costs.

[0015] Based on the above analysis, the tractor can turn around on the spot in a short time, improving the transfer efficiency; and its design avoids damage to the aircraft's front wheels and reduces subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 This is a structural diagram of a wireless remote-controlled tractor for light aircraft provided by the utility model;

[0018] Figure 2 This is a schematic structural diagram of a frame and components of a wireless remote-controlled tractor for light aircraft provided by the present invention;

[0019] Figure 3 The utility model provides a schematic structural diagram of a wheel lock assembly of a wireless remote-controlled tractor for light aircraft.

[0020] Figure numerals: 1. driven wheel; 2. crawler track; 3. driving transmission wheel; 4. auxiliary guide wheel; 5. motor; 6. power supply; 7. electric control panel; 8. manual control panel; 9. frame; 10. upper wheel movable shaft; 11. side connecting plate; 12. ear seat; 13. end connecting plate; 14. magnetic locker; 15. limit plate; 16. return turntable; 17. turntable connecting plate; 18. support plate. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] The utility model provides a wireless remote control tractor for light aircraft, such as Figures 1 to 3 As shown, it includes a frame 9, a track assembly symmetrically arranged on the outside of the frame 9, and a locking wheel assembly, and the locking wheel assembly is arranged between the track assemblies. The bottom of the locking wheel assembly is provided with a turntable connecting plate 17 connected to the frame 9, and the top of the turntable connecting plate 17 is rotatably connected to the return turntable 16. A support plate 18 is also provided on one side of the return turntable 16. One end of the support plate 18 is folded toward the top of the return turntable 16. The folded end of the support plate 18 is provided with a magnetic lock 14 and a limit plate 15. The limit plate 15 is provided with a switch, and the switch is electrically connected to the magnetic lock 14. The upper surface of the return turntable 16 is symmetrically provided with ear seats 12, and the ear seats 12 are hinged with side connecting plates 11. The end of the side connecting plate 11 close to the magnetic lock 14 is provided with an end connecting plate 13. The other end of the side connecting plate 11 is provided with multiple upper wheel movable shafts 10. A first groove for the rotation of the side connecting plate 11 is opened between the ear seats 12. The frame 9 houses a power system and control system, with the power system and switches electrically connected to the control system. This light aircraft is wirelessly towed by remotely controlling the aircraft's front wheels, which are attached to a side connecting plate 11. This side connecting plate 11 is articulated with a return turntable 16, allowing the front wheels to move with the towing vehicle. The return turntable 16 can be rotated when connected to a turntable connecting plate 17 and the frame 9, enabling the aircraft to turn around during towing.

[0024] In actual use, the wireless remote control tractor for light aircraft sends operating commands to the power system and the switch through the control system to complete the movement, steering and power-on and power-off of the tractor and other related operations. In this embodiment, the control system includes a wireless controller, WIFI, infrared and Bluetooth remote control, and sends corresponding operating commands to the control system through the remote wireless remote control. The control system sends a movement command to the power system so that the tractor moves through the track assembly, and the control system sends a command to the switch provided on the limit plate 15 to control the power on or off of the magnetic lock 14 electrically connected to the switch. The power on or off of the magnetic lock 14 adsorbs or releases the end connecting plate 13, thereby controlling the symmetrically arranged side connecting plate 11 to rotate on the ear seat 12 on the return turntable 16. When the front wheel of the aircraft presses into or out of the side connecting plate 11, the locking wheel assembly contacts or moves away from the ground at one end of the upper wheel movable shaft 10. When the front wheel of the aircraft is between the side connecting plates 11, the limiting plate 15 and the end connecting plate 13 are respectively limited at the bottom and front end of the front wheel to prevent the front wheel from moving further. Figure 3 shown.

[0025] Exemplarily, the side connecting plate 11 and the return disc 16 are hingedly connected at the ear seat 12, and the side connecting plate 11 and the ear seat 12 rotate via a rotating shaft. The bottom of the side connecting plate 11 is embedded in a first groove of the return disc 16. The first groove limits the side connecting plate 11, allowing the side connecting plate 11 to rotate along the rotating shaft provided on the ear seat 12. A second groove is defined at one end of the side connecting plate 11, near the upper wheel movable shaft 10. This prevents the side connecting plate 11 from contacting the return disc 16 and causing friction and locking when the side connecting plate 11 contacts the ground.

[0026] The light aircraft wireless remote control tractor comprises a frame 9, such as Figure 2 As shown, symmetrical driving wheels 3, driven wheels 1, auxiliary guide wheels 4, and crawler tracks 2 are provided on both sides of the outer side of the vehicle frame 9. The driving wheels 3 and the driven wheels 1 are respectively engaged with the crawler tracks 2. When the driving wheels 3 and the crawler tracks 2 move in an engaged manner, they drive the driven wheels 1 and auxiliary guide wheels 4 to rotate together, thereby realizing the movement of the tractor.

[0027] Specifically, the wireless remote-controlled tractor for light aircraft is remotely controlled via an electric control panel 7 and a remote controller to control the movement of the tractor. A power source 6 for providing movement of the wireless remote-controlled tractor for light aircraft and a motor 5 for rotating the active drive wheel 3 are provided on the inner side of the vehicle frame 9.

[0028] In actual use, the power source 6 provides power to the motor 5. The power generated by the motor 5 is transmitted to the flange through the reducer and the drive shaft. The flange is fixed to the active transmission wheel 3 by bolts. Under the action of the driving torque, the active transmission wheel 3 engages with the crawler 2, thereby driving the crawler 2 to rotate. The driven wheel 1 and the auxiliary guide wheel 4 are both engaged with the crawler 2, and the auxiliary guide wheel 4 continuously rolls on the crawler 2.

[0029] The wireless remote-controlled tractor for light aircraft has two symmetrical side connecting plates 11 with multiple upper wheel movable shafts 10 at one end, and an end connecting plate 13 at the other end. The front wheels of the aircraft roll into the side connecting plate 11 at one end of the upper wheel movable shafts 10 and stop when they roll to the end connecting plate 13.

[0030] The lock wheel assembly of the wireless remote-controlled light aircraft tractor has an elastic member, such as a coil spring, disposed at the bottom of the return turntable 16. When the light aircraft is transported to the designated location and unloaded, the elastic member cooperates with the magnetic lock 14 to lift the end of the side connecting plate 11 near the upper wheel movable shaft 10 off the ground, thereby pulling the side connecting plate 11 back to its original position and achieving reset.

[0031] A manual control panel 8 is provided on a vehicle frame 9 of the wireless remote control tractor for light aircraft. When the electric control panel 7 and the remote control device are in an environment without a network or in harsh conditions, the tractor can be operated normally by operating the manual control panel 8.

[0032] Example:

[0033] A wireless remote-controlled tractor for light aircraft is moved to the front wheel position of the light aircraft to be moved by a remote controller, with one end of the upper wheel movable shaft 10 between the side connecting plates 11 aligned with the front wheel. The remote control controls the electric control panel 7, causing the power supply 6 to power the motor 5, which in turn drives the driving wheels 3 on both sides of the frame 9. The tractor is supported on the ground by auxiliary guide wheels 4 and a wound endless rubber track 2. Power is supplied to the motor 5 via the power supply 6 and transmitted to the flange through a speed reducer and a drive shaft. The flange is fixed to the driving wheel 3 by bolts. Under the action of the driving torque, the driving wheel 3 continuously winds up the track 2 from the rear through the meshing of the gear teeth on the driving wheel 3 and the grooves in the middle of the track 2. The driving wheel 3 continuously overcomes the ground resistance and rolls the track 2 forward. The auxiliary guide wheel 4 continuously rolls on the track 2, thereby driving the tractor.

[0034] When the tractor is working, the towed aircraft is in a stationary state, and the tractor's wheel lock assembly is adjusted to align with the aircraft's front wheel for movement. The magnetic lock 14 is powered off by the switch on the limit plate 15, and one end of the upper wheel movable shaft 10 of the wheel lock assembly tilts forward due to gravity. The second groove is blocked by the return turntable 16 and the turntable connecting plate 17 to prevent the wheel lock assembly from being locked by friction with the ground. As the tractor moves, the aircraft's front wheel moves to the side connecting plate 11 through the upper wheel movable shaft 10. The tractor continues to move, and when the aircraft's front wheel hits the end connecting plate 13, the bottom of the aircraft's front wheel is limited by the limit plate 15. At this time, the aircraft's front wheel is completely on the wheel lock assembly. Since the center of gravity of the wheel lock assembly and the aircraft's front wheel is at one end of the end connecting plate 13, the side connecting plate 11 is close to one end of the upper wheel movable shaft 10 and leaves the ground. The end connecting plate 13 drives the limit plate 15 to move due to inertia. After the switch on the limit plate 15 is powered, the magnetic lock 14 turns on the magnetic force and attracts the end connecting plate 13, thereby forming a locking structure to limit the front wheel of the aircraft. The tractor is remotely controlled by a remote controller to start the aircraft's front wheel towing. When turning is required, the aircraft's front wheel and the side connecting plate 11 are on the return turntable 16. After the aircraft's front wheel is locked and fixed, five degrees of freedom are restricted, and only one degree of freedom is on the return turntable 16. This ensures that the tractor's movement is consistent with the aircraft's movement by relying on the front wheel steering principle, preventing the tractor from locking when it is free to move to a small turning radius.

[0035] When the tractor turns, only the motor 5 on one side of the frame 9 drives the active drive wheel 3, thereby moving the track 2 on that side. The teeth of the secondary guide wheel 4 secure the track 2 in the grooves inside the track 2, preventing it from slipping laterally and enabling the tractor to turn smoothly. Excessive use of the track 2 can cause it to stretch and deform, leading to loosening at the meshing points between the track 2, the active drive wheel 3, and the secondary guide wheel 4. To address this issue, the screw on the tractor frame 9 can be adjusted to adjust the length of the frame 9 to accommodate the stretched track 2, keeping it in a constant tensioned state.

[0036] When the aircraft is towed to the designated position, the remote control system is controlled by the remote controller, and the remote control switch cuts off the power to the magnetic lock 14, and the tractor continues to move in the direction of the aircraft. The front wheel of the aircraft is stationary on the side connecting plate 11 due to the gravity of the aircraft. Eventually, the tractor moves, and one end of the upper wheel movable shaft 10 of the locking wheel assembly contacts the ground, so that the tractor is detached from the front wheel of the aircraft. After the front wheel of the aircraft is detached from the locking wheel assembly, the elastic member between the return turntable 16 and the side connecting plate 11 pulls the return turntable 16 back to the initial position, and makes the side connecting plate 11 close to the end connecting plate 13 and contact the magnetic lock 14. The remote control switch makes the magnetic lock 14 connected to the power and adsorbed to the end connecting plate 13, so that the side connecting plate 11 of the locking wheel assembly close to the end of the upper wheel movable shaft 10 leaves the ground, and finally the locking wheel assembly is reset.

[0037] When the wireless remote control tractor for light aircraft is working in a situation where there is no network or the environment is bad (rain or strong electromagnetic interference), the above remote control operations can be completed through the manual control panel 8.

[0038] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0039] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A light aircraft wireless remote control tractor, characterized in that: It comprises a vehicle frame (9), a track assembly symmetrically arranged outside the vehicle frame (9), and a locking wheel assembly, wherein the locking wheel assembly is arranged between the track assemblies; The bottom of the locking wheel assembly is provided with a turntable connecting plate (17) connected to the vehicle frame (9), the top of the turntable connecting plate (17) is rotatably connected to the return turntable (16), and a support plate (18) is further provided on one side of the return turntable (16), one end of the support plate (18) is folded toward the top of the return turntable (16), and the folded end of the support plate (18) is provided with a magnetic lock (14) and a limit plate (15), and the limit plate (15) is provided with a switch, and the switch is electrically connected to the magnetic lock (14); The upper surface of the return turntable (16) is symmetrically provided with ear seats (12), the ear seats (12) are hinged with side connecting plates (11), one end of the side connecting plate (11) close to the magnetic locker (14) is provided with an end connecting plate (13), the other end of the side connecting plate (11) is provided with a plurality of upper wheel movable shafts (10), and a first groove for the rotation of the side connecting plate (11) is provided between the ear seats (12); A power system and a control system are provided inside the vehicle frame (9), and the power system and the switch are electrically connected to the control system.

2. A light aircraft wireless remote control tractor according to claim 1, characterized in that: The side connecting plate (11) is provided with a second groove near the first groove, and the second groove is arranged in a triangular shape.

3. A light aircraft wireless remote control tractor according to claim 1, characterized in that: An elastic member is provided between the return turntable (16) and the side connecting plate (11).

4. A light aircraft wireless remote control tractor according to claim 1, characterized in that: The power system comprises a motor (5) symmetrically arranged on the inner side of the frame (9), the motor (5) being electrically connected to a power source (6), and the power source (6) being arranged between the motor (5) and the locking wheel assembly.

5. A light aircraft wireless remote control tractor according to claim 4, characterized in that: The crawler track assembly comprises an active transmission wheel (3) connected to the motor (5), a speed reducer is provided between the active transmission wheel (3) and the motor (5), and the active transmission wheel (3) is provided on the outside of the vehicle frame.

6. A light aircraft wireless remote control tractor according to claim 5, characterized in that: Driven wheels (1) and auxiliary guide wheels (4) are provided on both sides of the vehicle frame (9), and the active transmission wheel (3), the driven wheel (1) and the auxiliary guide wheel (4) are all meshedly connected with crawler tracks (2).

7. A light aircraft wireless remote control tractor according to claim 6, characterized in that: The control system comprises an electric control panel (7) and a manual control panel (8) connected to the vehicle frame (9), and the electric control panel (7) and the manual control panel (8) are both electrically connected to the motor (5).

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