Aircraft nose wheel holding device

Abstract

The invention relates to an airplane nose wheel gripping device which comprises a frame and is characterized in that a swinging rack is hinged with a frame through a rotating pin shaft at the center of the swinging rack; a primary gripping platform is arranged at the rear part of the swinging rack; the two sides of the upper end of the front of the primary gripping platform are respectively provided with a support frame and a turnover oil cylinder along the center; the two sides of the lower end of the primary gripping platform are respectively hinged with the swinging rack through a lifting cylinder; the rear part of the primary gripping platform is hinged with the lower end of an auxiliary gripping platform through a hinge; the middle part of the primary gripping platform is hinged with pulling rods of the primary gripping platform and the auxiliary gripping platform; the turnover oil cylinder and the pulling rods of the primary gripping platform and the auxiliary gripping platform are respectively hinged with the middle part of the auxiliary gripping platform; telescopic sleeves are respectively arranged on the two sides of the auxiliary gripping platform; the side faces of the telescopic sleeves are in rigid connection with the auxiliary gripping platform; the lower ends of the telescopic sleeves are hinged with the primary gripping platform through a height adjustment oil cylinder; each telescopic sleeve is internally provided with a telescopic cylinder; telescopic arms are in sliding connection with the telescopic sleeves; the rear ends of the telescopic arms are provided with a locked frame; and the lock frame is provided with pincers, a locking mechanism and a gripping cylinder. The airplane nose wheel gripping device has advantages of novel structure and large constraining force.

Description

technical field [0001] The invention relates to the technical field of aircraft ground facilities, in particular to an aircraft nose wheel clamping device. Background technique [0002] As an important equipment in the airport industry, aircraft tractors are mainly used for towing and pushing operations of aircraft. Compared with the traditional rod-mounted aircraft tractor, the wheel-holding aircraft tractor has the advantages of high efficiency, low emission, and high degree of intelligence. The wheel holding aircraft tractor is equipped with a set of nose wheel holding clip device, which can lift the nose wheel off the ground. As an important component of the wheel holding tractor, the nose wheel holding clamp device often determines the operation performance of the whole vehicle. [0003] Since the nose wheels of civil aviation aircraft have different diameters, the clamping device should be able to adapt to the requirements of different aircraft types. [0004] At pr...

AI Technical Summary

Problems solved by technology

[0005] After retrieval, CN202147843 discloses a clamping-lifting device for a rodless aircraft tractor, 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 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 nose 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

[0006] CN03263980.5 discloses a device for clamping and lifting the front nose wheel of an aircraft on the Internet. It controls the movement of the front and rear clamping roller groups respectively with the front and rear control arms hinged on the lifting arm. The swing of the arm relative to the lifting arm is respectively restricted by the ratchet mechanism and the stopper. When the piston rod of the hydraulic cylinder is stretched out, the rear control arm first swings around the hinge point, and the rear control arm is driven by the connecting rod hinged on its upper end. The movement of the vertical seat cover holding the roller is controlled by the fan-shaped cam of the vertical seat cover and the roller mounted obliquely on the end of the lifting arm. The rear clamping roller first deflects inward, closing the passage behind the front nose wheel of the aircraft, and converting to The horizontal axis swings from the rear to the upper side along the arc, during which the rear clamping roller contacts and pulls the front nose wheel of the aircraft to roll on the support plate fixed under the lifting arm until the lower end of the rear control arm and the lower part of the lifting arm Until the block touches, the rear control arm touches the block and at the same time touches the control clamp mechanism to release a spring-loaded pawl to prevent the front clamping roller group from continuing to move forward under the push of the nose wheel of the aircraft, passing the block Apply force to push the lifting arm and the clamped nose wheel of the aircraft upward together. The disadvantage of this wheel holding mechanism is also that 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. Wheel-holding mechanism, get rid of the rodless aircraft tractor and easily cause accidents

[0007]The other nose wheel clamping devices mostly use roller clamping devices, this kind of roller clamping mechanism is prone to the risk of side slipping of the nose wheel, and the clamping mechanism is The first level of clamping, and the nose wheel is lifted after being tightly held by the clamping mechanism. This kind of clamping mechanism has the problems of unstable clamping state and unstable center of the nose wheel, which can easily cause safety hazards

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