Wheel holding mechanism of rodless aircraft tractor

Abstract

The invention relates to the field of aviation ground facilities and specifically relates to a wheel holding mechanism of a rodless aircraft tractor. The wheel holding mechanism comprises a frame, a main lifting connecting rod, an auxiliary lifting connecting rod, a lifting oil cylinder, a swing main shaft, a swing support, a compression support, a compression oil cylinder and a clamping device, and is characterized in that the wheel holding mechanism is provided with a pushing device, the pushing device comprises a pushing main plate, a pushing oil cylinder, sliding blocks, positioning plates, an upper positioning plate and a lower positioning plate, the pushing oil cylinder is arranged at the lower end of a support platform, the pushing main plate is arranged on one side, the other end of the pushing oil cylinder is hinged with the pushing main plate through a pin shaft, the two ends of the pushing main plate are respectively fixedly connected with the positioning plates, the upper positioning plate and the lower positioning plate are arranged on the outer sides of the positioning plates, the upper positioning plate is in sliding connection with the upper end surface of a support arm via the sliding block, the lower positioning plate is in sliding connection with the lower end surface of the support arm via the sliding block, and then the pushing main plate can move rectilinearly along the support arm. When a front nose gear of an aircraft is clamped, brake constraint can be simultaneously performed on aircraft wheels by at least three points, namely the compression support, a clamping jaw and the pushing main plate, so that the potential safety hazard caused by two-point brake constraint can be solved, the traction safety can be greatly improved and the using risks of airports and airline companies can be further reduced.

Description

technical field [0001] The invention relates to the field of aviation ground facilities, in particular to a wheel-holding mechanism of a rodless aircraft tractor for holding and clamping aircraft nose wheels. Background technique [0002] At present, most countries in the world are vigorously developing the aviation industry, and there has been a momentum of vigorous development. Due to the advantages of greatly saving labor costs and use costs, the rodless aircraft tractor has been favored by the majority of airports and airlines. The rodless aircraft tractor It is in direct contact with the nose gear of the aircraft, and the towing operation is completed by using the wheel holding mechanism of the rodless aircraft tractor to pick up the nose wheel of the aircraft. It not only securely and reliably clamps the nose wheel of the aircraft when it is connected to the towed aircraft, but also lifts it off the ground And to complete the reverse action when leaving the aircraft, i...

AI Technical Summary

Problems solved by technology

[0003] After searching, CN202147843 discloses a rodless aircraft tractor clamping-lifting device, which includes a turntable, a turntable fixing part, a middle shaft, and a front arc clamp Holding plate, vertical shaft, rear baffle, hydraulic cylinder assembly, front hinged joint, rear hinged joint and rear baffle limit plate, turntable device tractor surface, turntable fixing part is installed on the turntable surface, a round hole is formed in the upper part, and the middle The vertical axis on the rotating shaft is set in the round hole, the upper end of the front arc-shaped clamping plate is hinged on the horizontal axis of the intermediate rotating shaft, the lower end of the vertical shaft is fixed at the opening of the U-shaped groove, the rear baffle is connected with the turntable through the vertical shaft, and the hydraulic cylinder assembly passes through the front, The rear hinge joint is hinged with the front arc-shaped clamping plate and the rear baffle, and the limit plate of the rear baffle is set on the surface of the turntable. The disadvantages of this device are: 1. It does not have the function of automatically matching the size of the wheel and cannot clamp Aircraft nose wheels with different diameters, 2. The restraining force of the wheel holding mechanism is not enough. During the traction process, the nose wheel of the aircraft is easy to jump up and down, causing the nose wheel of the aircraft to jump out of the wheel holding mechanism and get rid of the rodless aircraft tractor, which may easily cause accidents

[0005] According to the above, there are also great differences in the wheel holding mechanisms of different manufacturers of rodless aircraft tractors. In terms of the safety protection of aircraft nose wheels, the safety considerations The focus is also different. In the past accidents of rodless aircraft tractors, most of them occurred on the wheel holding mechanism, and they were usually controlled by two-point positioning of the front and rear clamping rollers (or positioning frame and clamping pliers). The horizontal position of the nose wheel of the aircraft and the transmission of traction / braking force. Some structures at the bottom of the nose wheel of the aircraft use a support plate to bear the weight of the wheel to constrain the nose wheel of the aircraft, resulting in insufficient restraint of the wheel holding mechanism. During the traction process The nose wheel of the aircraft is easy to jump up and down, and the dangerous accident is that the nose wheel of the aircraft jumps out of the wheel holding mechanism and gets rid of the rodless aircraft tractor

The occurrence of such accidents will not only cause serious economic losses to airports and civil aviation companies, but also cause serious social impacts. The occurrence of accidents will even take the lives of precious people

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