Aircraft tractor wheel holding mechanism based on hydraulic labor-saving lever

Abstract

The utility model discloses an aircraft tractor wheel holding mechanism based on a hydraulic labor-saving lever. The aircraft tractor wheel holding mechanism comprises a tractor body, a lifting assembly and a clamping component. Wheels distributed in a rectangular shape are arranged on the periphery of the vehicle body, and a U-shaped installation opening is formed in the position, located on the inner sides of the wheels, of one side of the vehicle body. The lifting assembly is arranged in the U-shaped mounting opening, a connecting plate is arranged on the side, away from an opening of the U-shaped mounting opening, of the U-shaped mounting opening in an up-down rotating mode through a bearing, a U-shaped base is fixedly arranged at the end, away from the hinged end of the connecting plate, of the connecting plate, and jacking hydraulic cylinders are symmetrically and fixedly arranged on the two sides of the interior of the U-shaped mounting opening. The rotating shaft is used for integrally rotating the connecting plate and the U-shaped base up and down; the clamping component is arranged on the U-shaped base and used for holding and loosening the airplane wheel. The aircraft tractor wheel holding mechanism based on the hydraulic labor-saving lever is suitable for pulling up and clamping aircraft landing gears with different aircraft wheel sizes, and is reasonable in structural design, safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of special machinery technology in civil aviation, and in particular to a wheel-holding mechanism for aircraft tractors based on hydraulic force-saving levers. Background Technology

[0002] An aircraft towing vehicle is a special vehicle used to tow aircraft on the ground at an airport. Currently, there are two types: towing vehicles without booms and towing vehicles with booms. Due to the characteristics of aircraft, starting the aircraft's engine when moving the aircraft a short distance would result in greater wear and tear and make it difficult to control. Furthermore, aircraft are designed with optimal performance in mind and do not include a reverse function. Aircraft towing vehicles play a significant role in improving airport efficiency and ensuring stable airport operation.

[0003] Current tow bar aircraft towing vehicles have several problems: they require specially designed tow bars that match both the aircraft and the towing vehicle; the increased length of the tow bar widens the working range required for both the towing vehicle and the aircraft, increasing the difficulty of the operation and significantly impacting work efficiency; the tow bar adds an extra connection point between the towing vehicle and the aircraft, making steering operations more difficult than normal; and connecting the tow bar to the aircraft requires a dedicated person to work with the towing vehicle driver to install and remove the tow bar. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever.

[0005] This utility model provides a hydraulic lever-based aircraft tractor wheel-holding mechanism, comprising a vehicle body, a lifting assembly, and a clamping component; wherein...

[0006] The vehicle body has rectangular wheels arranged around its perimeter, and a U-shaped mounting opening is provided on one side of the vehicle body inside the wheels.

[0007] The lifting assembly is located inside the U-shaped mounting opening. A connecting plate is provided on the side of the U-shaped mounting opening away from its opening via a bearing that rotates up and down. A U-shaped base is fixedly provided on the end of the connecting plate away from its hinge. Lifting hydraulic cylinders are symmetrically fixed on both sides inside the U-shaped mounting opening for rotating the connecting plate and the U-shaped base as a whole up and down.

[0008] The clamping member is disposed on the U-shaped base and is used to clamp and release the wheel.

[0009] Furthermore, one end of the lifting hydraulic cylinder is rotatably connected to the inner wall of the U-shaped mounting opening via a first support rod, and the other end is rotatably connected to the outer wall of the U-shaped base via a second support rod.

[0010] Furthermore, the clamping member includes a front pressure plate assembly and a rear pressure plate assembly; wherein,

[0011] The front pressure plate assembly includes a base plate fixedly disposed inside the U-shaped base near the connecting plate. A tilting hydraulic cylinder is disposed on the top surface of the base plate. A movable front pressure plate is disposed at the transmission end of the tilting hydraulic cylinder. The angle of the front pressure plate is adjusted by the tilting hydraulic cylinder to achieve abutment on one side of the machine wheel.

[0012] The rear pressure plate assembly includes a rear pressure plate disposed on one side of the opening of the U-shaped base. One side of the rear pressure plate is hinged to the opening of the U-shaped base, and the other side is limited by an opening and closing pin assembly. An L-shaped support rod is fixedly disposed on one side of the U-shaped base, and a connecting rod is fixedly disposed on the hinged top surface of the rear pressure plate. An opening and closing hydraulic cylinder is disposed between the vertical rod of the L-shaped support rod and the connecting rod. One end of the opening and closing hydraulic cylinder is rotatably disposed on the vertical rod of the L-shaped support rod, and the other end is rotatably disposed on the connecting rod.

[0013] Furthermore, the opening and closing pin assembly includes a first limiting plate fixedly disposed on the side of the U-shaped base away from the opening and closing hydraulic cylinder at the open end. A second limiting plate is fixedly disposed on the side of the rear pressure plate away from the opening and closing hydraulic cylinder, corresponding to the first limiting plate. When the rear pressure plate and the U-shaped base are in a closed state, the first limiting plate and the second limiting plate are arranged vertically. Pin holes are provided on the surface of both the second limiting plate and the first limiting plate, and opening and closing pins are provided corresponding to the pin holes. A push rod motor is fixedly disposed on the top surface of the first limiting plate. The transmission rod of the push rod motor is arranged in the vertical direction, and the transmission rod of the push rod motor is fixedly connected to the opening and closing pin for driving the opening and closing pin to move up and down.

[0014] Furthermore, a mounting plate is fixedly provided on the side of the rear pressure plate away from the front pressure plate, and a clamping plate is provided on the top surface of the rear pressure plate. The bottom of the clamping plate is hinged to the top surface of the rear pressure plate. A clamping hydraulic cylinder is provided on the top surface of the mounting plate. One end of the clamping hydraulic cylinder is hinged to the top surface of the mounting plate, and the other end is hinged to the top of the clamping plate.

[0015] Furthermore, the clamping plate has protrusions on the side near the wheel to increase the clamping force when clamping and holding the wheel.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model discloses a hydraulic lever-based aircraft towing trolley wheel clamping mechanism, used for the lifting and clamping operations of aircraft towing taxiing and forward takeoff and landing, enabling the aircraft to move forward, backward, and turn under the pull of the towing trolley. It integrates the aircraft wheels and the towing trolley into a single unit, overcoming the problems of traditional towing trolleys with tow bars, which required a dedicated person to assist the towing trolley driver in installing and removing the tow bar, had a large towing trolley mass, a large turning radius, and high operational difficulty. Since no dedicated tow bar is needed during towing, it improves operational safety and efficiency. The integrated design of the aircraft and towing trolley enhances vehicle maneuverability. This device is suitable for lifting and clamping landing gear of aircraft with different wheel sizes, and its structural design is reasonable, safe, and reliable.

[0018] It should be understood that the content described in the utility model description section is not intended to limit the key or important features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model.

[0019] Other features of this invention will become readily apparent from the following description. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 A schematic diagram of the structure of an aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever and its cooperation with the aircraft wheel is provided for an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the right side of the tractor wheel clamping mechanism;

[0023] Figure 3 This is a schematic diagram of the front structure of the wheel clamping mechanism of the tractor.

[0024] Figure 4 This is a top view of the tractor wheel clamping mechanism.

[0025] Labels in the diagram: 1. Vehicle body; 2. Wheel; 3. U-shaped mounting port; 4. Bearing; 5. Connecting plate; 6. U-shaped base; 7. Lifting hydraulic cylinder; 8. First support rod; 9. Second support rod; 10. Tilting hydraulic cylinder; 11. Front pressure plate; 12. Rear pressure plate; 13. L-shaped support rod; 14. Connecting rod; 15. Opening and closing hydraulic cylinder; 16. First limit plate; 17. Second limit plate; 18. Opening and closing pin; 19. Push rod motor; 20. Mounting plate; 21. Clamping plate; 22. Clamping hydraulic cylinder; 23. Machine wheel; 24. Base plate. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0027] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Please refer to Figures 1-4 This utility model provides an aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever, comprising a vehicle body 1, a lifting assembly, and a clamping component; wherein,

[0029] The vehicle body 1 has rectangular wheels 2 arranged around its perimeter. The wheels 2 are used to move the aircraft towing vehicle. A U-shaped mounting port 3 is provided on one side of the vehicle body 1, inside the wheels 2.

[0030] The lifting assembly is located inside the U-shaped mounting port 3. A connecting plate 5 is mounted on the side of the U-shaped mounting port 3 away from its opening, which is rotated up and down by a bearing 4. A U-shaped base 6 is fixedly mounted on the end of the connecting plate 5 away from its hinge, that is, the U-shaped base 6 and the connecting plate 5 are integral structures. Lifting hydraulic cylinders 7 are symmetrically fixed on both sides inside the U-shaped mounting port 3, which are used to rotate the connecting plate 5 and the U-shaped base 6 as a whole up and down.

[0031] In a preferred embodiment, one end of the lifting hydraulic cylinder 7 is rotatably connected to the inner wall of the U-shaped mounting port 3 via the first support rod 8, and the other end is rotatably connected to the outer wall of the U-shaped base 6 via the second support rod 9; the lifting hydraulic cylinder 7 enables the U-shaped base 6 and the connecting plate 5 to rotate up and down along the bearing 4, thereby realizing the lifting process of the U-shaped base 6, making the lifting process smoother and more efficient.

[0032] The clamping component, set on the U-shaped base 6, is used to clamp and release the wheel 23.

[0033] In a preferred embodiment, the clamping member includes a front pressure plate assembly and a rear pressure plate assembly; wherein,

[0034] The front pressure plate assembly includes a base plate 24 fixedly disposed inside the U-shaped base 6 near the connecting plate 5. A tilting hydraulic cylinder 10 is disposed on the top surface of the base plate 24. A movable front pressure plate 11 is disposed at the transmission end of the tilting hydraulic cylinder 10. The angle of the front pressure plate 11 is adjusted by the tilting hydraulic cylinder 10 to achieve abutment on one side of the machine wheel 23. A pressure sensor is installed on the front pressure plate 11 to monitor the change in clamping force of the wheel clamping mechanism in real time.

[0035] One end of the tilting hydraulic cylinder 10 is hinged to the top surface of the base plate 24, and the other end is hinged to the side of the front pressure plate 11 near the connecting plate 5. The bottom surface of the front pressure plate 5 is rotatably connected to the base plate 24, which is used to adjust the angle of the front pressure plate 11 by the tilting hydraulic cylinder 10, so that the front pressure plate 11 deflects and fits against the machine wheel 23.

[0036] The rear pressure plate assembly includes a rear pressure plate 12 disposed on one side of the opening of the U-shaped base 6. One side of the rear pressure plate 12 is hinged to the opening of the U-shaped base 6, and the other side is limited by an opening and closing pin assembly. An L-shaped support rod 13 is fixedly disposed on one side of the U-shaped base 6, and a connecting rod 14 is fixedly disposed on the hinged top surface of the rear pressure plate 12. An opening and closing hydraulic cylinder 15 is disposed between the vertical rod of the L-shaped support rod 13 and the connecting rod 14. One end of the opening and closing hydraulic cylinder 15 is rotatably disposed on the vertical rod of the L-shaped support rod 13, and the other end is rotatably disposed on the connecting rod 14.

[0037] The opening and closing hydraulic cylinder 15 extends when the tractor detects the wheel, causing the rear pressure plate 12 to rotate and open, allowing the wheel 23 to enter the U-shaped base 6.

[0038] In a preferred embodiment, the opening and closing pin assembly includes a first limiting plate 16 fixedly disposed on the side of the U-shaped base 6 away from the opening end of the hydraulic cylinder 15. A second limiting plate 17 is fixedly disposed on the side of the rear pressure plate 12 away from the hydraulic cylinder 15, corresponding to the first limiting plate 16. When the rear pressure plate 12 and the U-shaped base 6 are in a closed state, the first limiting plate 16 and the second limiting plate 17 are arranged vertically. Pin holes are provided on the surface of both the second limiting plate 17 and the first limiting plate 16, and opening and closing pins 18 are provided corresponding to the pin holes. A push rod motor 19 is fixedly disposed on the top surface of the first limiting plate 16. The transmission rod of the push rod motor 19 is arranged in the vertical direction. The transmission rod of the push rod motor 19 is fixedly connected to the opening and closing pin 18 for driving the opening and closing pin 18 to move up and down.

[0039] In a preferred embodiment, a mounting plate 20 is fixedly provided on the side of the rear pressure plate 12 away from the front pressure plate 11, and a clamping plate 21 is provided on the top surface of the rear pressure plate 12. The bottom of the clamping plate 21 is hinged to the top surface of the rear pressure plate 12. A clamping hydraulic cylinder 22 is provided on the top surface of the mounting plate 20. One end of the clamping hydraulic cylinder 22 is hinged to the top surface of the mounting plate 20, and the other end is hinged to the top of the clamping plate 21.

[0040] The tilting hydraulic cylinder 10 and the clamping hydraulic cylinder 22 extend and retract according to a certain oil inlet / outlet ratio;

[0041] In a preferred embodiment, the clamping plate 21 has protrusions on the side near the wheel to increase the clamping force when clamping the wheel 23.

[0042] The working principle of this utility model:

[0043] When the aircraft needs to be towed by a leverless tractor, the pilot first drives the tractor a certain distance in front of the aircraft wheels 23. At this time, the tractor detects the position of the aircraft wheels 23, and the push rod motor 19 operates to open the opening and closing pin 18. The opening and closing hydraulic cylinder 15 extends to rotate the rear pressure plate 12, that is, the rear pressure plate 12 rotates and opens along its hinged end. Then the tractor moves forward, and the aircraft wheels 23 enter the U-shaped base 6 of the tractor. The tilting hydraulic cylinder 10 moves to adjust the angle of the front pressure plate 11, so that the contact area between the front pressure plate 11 and the front end of the aircraft wheels 23 increases. At this time, the opening and closing hydraulic cylinder 15 retracts, and the rear pressure plate 12 contacts the rear end of the aircraft wheels 23. Then the push rod motor 19 operates to close the opening and closing pin 18. The clamping hydraulic cylinder 22 moves to move the clamping plate 21 to clamp the aircraft wheels 23. Finally, the lifting hydraulic cylinder 7 is activated, and the U-shaped base 6 rotates and lifts around the bearing 4, thereby pushing the aircraft to move.

[0044] When the aircraft reaches the designated position, the wheel 23 needs to be lowered to the ground. The lifting hydraulic cylinder 7 retracts, causing the U-shaped base 6 to slowly fall around the bearing 4. After it falls to the ground, the clamping hydraulic cylinder 22 retracts, causing the clamping plate 21 to release the wheel 23. After detecting that the clamping plate 21 has completely released the wheel 23, the push rod motor 19 operates, opening the opening and closing pin 18, extending the opening and closing hydraulic cylinder 15, opening the back pressure plate 12, and completing the process of lowering the wheel 23. The tractor moves out of the wheel area, and the wheel clamping mechanism returns to its initial state.

[0045] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic lever-based aircraft tractor wheel-holding mechanism, characterized in that, Includes the vehicle body, lifting components, and clamping components; among which, The vehicle body has rectangular wheels arranged around its perimeter, and a U-shaped mounting opening is provided on one side of the vehicle body inside the wheels. The lifting assembly is located inside the U-shaped mounting opening. A connecting plate is provided on the side of the U-shaped mounting opening away from its opening via a bearing that rotates up and down. A U-shaped base is fixedly provided on the end of the connecting plate away from its hinge. Lifting hydraulic cylinders are symmetrically fixed on both sides inside the U-shaped mounting opening for rotating the connecting plate and the U-shaped base as a whole up and down. The clamping member is disposed on the U-shaped base and is used to clamp and release the wheel.

2. The aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever according to claim 1, characterized in that, One end of the lifting hydraulic cylinder is rotatably connected to the inner wall of the U-shaped mounting opening via a first support rod, and the other end is rotatably connected to the outer wall of the U-shaped base via a second support rod.

3. The aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever according to claim 1, characterized in that, The clamping component includes a front pressure plate assembly and a rear pressure plate assembly; wherein... The front pressure plate assembly includes a base plate fixedly disposed inside the U-shaped base near the connecting plate. A tilting hydraulic cylinder is disposed on the top surface of the base plate. A movable front pressure plate is disposed at the transmission end of the tilting hydraulic cylinder. The angle of the front pressure plate is adjusted by the tilting hydraulic cylinder to achieve abutment on one side of the machine wheel. The rear pressure plate assembly includes a rear pressure plate disposed on one side of the opening of the U-shaped base. One side of the rear pressure plate is hinged to the opening of the U-shaped base, and the other side is limited by an opening and closing pin assembly. An L-shaped support rod is fixedly disposed on one side of the U-shaped base, and a connecting rod is fixedly disposed on the hinged top surface of the rear pressure plate. An opening and closing hydraulic cylinder is disposed between the vertical rod of the L-shaped support rod and the connecting rod. One end of the opening and closing hydraulic cylinder is rotatably disposed on the vertical rod of the L-shaped support rod, and the other end is rotatably disposed on the connecting rod.

4. The aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever according to claim 3, characterized in that, The opening and closing pin assembly includes a first limiting plate fixedly disposed on the side of the U-shaped base away from the opening and closing hydraulic cylinder at the open end. A second limiting plate is fixedly disposed on the side of the rear pressure plate away from the opening and closing hydraulic cylinder, corresponding to the first limiting plate. When the rear pressure plate and the U-shaped base are in a closed state, the first limiting plate and the second limiting plate are arranged vertically. Pin holes are provided on the surface of both the second limiting plate and the first limiting plate, and opening and closing pins are provided corresponding to the pin holes. A push rod motor is fixedly disposed on the top surface of the first limiting plate. The transmission rod of the push rod motor is arranged vertically and is fixedly connected to the opening and closing pin for driving the opening and closing pin to move up and down.

5. The aircraft tractor wheel-holding mechanism based on a hydraulic force-saving lever according to claim 4, characterized in that, A mounting plate is fixedly provided on the side of the rear pressure plate away from the front pressure plate. A clamping plate is provided on the top surface of the rear pressure plate. The bottom of the clamping plate is hinged to the top surface of the rear pressure plate. A clamping hydraulic cylinder is provided on the top surface of the mounting plate. One end of the clamping hydraulic cylinder is hinged to the top surface of the mounting plate, and the other end is hinged to the top of the clamping plate.

6. The aircraft based on a hydraulic force-saving lever according to claim 5 The tractor wheel clamping mechanism is characterized in that, The clamping plate has protrusions on the side near the wheel to increase the clamping force when clamping the wheel.

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