Automatic Leveling System of Towbarless Aircraft Tractor

Abstract

The invention relates to the technical field of aviation ground facilities, in particular to an automatic leveling system of a rodless aircraft tractor. The automatic leveling system comprises a vehicle frame, a front axle, a left suspension hydraulic cylinder, a right suspension hydraulic cylinder and an oil tank and is characterized by further comprising a suspension valve block, energy accumulators, position sensors and an oil recharging pump. The position sensors are respectively arranged on lateral surfaces of telescopic rods of the left suspension hydraulic cylinder and the right suspension hydraulic cylinder to sense whether extending lengths of the suspension hydraulic cylinders are in place. The oil recharging pump is arranged on a hydraulic pipeline at the near end of the oil tank, one end of the suspension valve block is connected with the left suspension hydraulic cylinder and the right suspension hydraulic cylinder, and the other end of the suspension valve block is connected with the oil recharging pump. A left energy accumulator is arranged on the hydraulic pipeline between the left suspension hydraulic cylinder and the right suspension hydraulic cylinder, and a right energy accumulator is arranged on the hydraulic pipeline between the right suspension hydraulic cylinder and the suspension valve block. The automatic leveling system has the advantages of being simple in structure and stable in vehicle body and capable of meting vehicle working condition requirements and improving the work performance of the rodless aircraft tractor in the industry and the like.

Description

Technical field [0001] The invention relates to the technical field of aviation ground facilities, in particular to an automatic leveling system for a rodless aircraft tractor for holding and clamping an aircraft nose wheel. 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. Rodless aircraft tractors have been favored by the majority of airports and airlines due to the advantages of greatly saving labor costs and operating costs. Direct contact with the nose gear of the aircraft, specifically, the wheel holding mechanism of the rodless aircraft tractor lifts the nose wheel of the aircraft to complete the towing operation. Rodless aircraft tractors usually include a frame, a front axle, a left suspension cylinder, a right suspension cylinder and a fuel tank. The inner sides of the wheels at both ends of the front axle are equipped with supports, and the lower ...

AI Technical Summary

Problems solved by technology

A rodless aircraft tractor usually includes a frame, a front axle, a left suspension cylinder, a right suspension cylinder and a fuel tank. The inner sides of the wheels at both ends of the front axle are respectively provided with supports, and the lower ends of the left suspension cylinder and the right suspension cylinder are respectively The support is fixedly connected to the front axle, the upper telescopic rod is fixedly connected to the frame through the pin shaft, and the left suspension cylinder and the right suspension cylinder are respectively connected to the fuel tank through the hydraulic pipeline. Due to its special structure and working characteristics, After picking up the nose wheel of the aircraft, the body will be uneven and the chassis will drop to a certain extent, so that the distance between the chassis and the ground will be too low to affect the driving of the vehicle. Therefore, it is necessary to design a mechanism that can automatically level the barless aircraft tractor to solve the above problems. question

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