Holding device for airplane nose wheel

Abstract

The invention relates to the field of aeronautical ground equipment, in particular to a holding device for an airplane nose wheel. The holding device comprises a frame and is characterized in that the holding device is provided with an upper connecting rod, a lower connecting rod, a lifting oil cylinder, a rotating pin roll, a swing framer, a pressing bracket, a pressing oil cylinder, an upper pressing arm, a hinge pin roll, a clamp and a clamp pin roll, wherein the swing frame is hinged with the frame through the rotating pin roll; the front end of the lifting oil cylinder is hinged with the swing frame; the rear end of the lifting oil cylinder is hinged with the lower end of a saddle; a lifting rotary frame and the pressing bracket are arranged at the upper end of the front part of the saddle; a contacted work plane between the rear part of the saddle and the nose wheel is an inclined plane; the hinge pin roll is arranged at the front end of the lifting rotary frame; the pressing oil cylinder is arranged at the rear end of the lifting rotary frame; one end of the lower connecting rod is hinged with the swing frame; the other end of the lower connecting rod is hinged with the hinge pin roll; one end of the upper connecting rod is hinged with the hinge pin roll; the other end of the upper connecting rod is hinged with the frame; the lower end of the pressing bracket is hinged with the saddle; the upper end of the pressing bracket is hinged with the upper pressing arm; one end of the pressing oil cylinder is hinged with the lifting rotary frame; and the other end of the pressing oil cylinder is hinged with the upper pressing arm. The holding device disclosed by the invention has the advantages of novel structure, safety, reliability, great holding constraint force and the like.

Description

technical field [0001] The invention relates to the field of aviation ground equipment, and in particular relates to a clamping device for an aircraft nose wheel of a wheel-holding aircraft tractor. 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 ...

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. The movement of the front and rear clamping rollers, and the swing of the front and rear control arms relative to the lifting arm are respectively restricted by the ratchet mechanism and the stopper. When the piston rod of the hydraulic cylinder is extended, the rear control arm first rotates around the hinge point Swing, through the connecting rod hinged on its upper end, the movement of the stand cover equipped with the rear clamping roller is driven, and through the control of the fan-shaped cam of the stand cover and the roller installed obliquely on the end of the lifting arm, the rear clamping roller first moves to the Inward deflection, closing the channel behind the nose wheel of the aircraft, and converting it into a swing from the rear to the top along the circular arc around the horizontal axis, during which the rear clamping roller contacts and pulls the nose wheel of the aircraft to roll up and fix it under the lifting arm until the lower end of the rear control arm contacts the stopper at the lower part of the lifting arm, and when the rear control arm touches the stopper, it also touches the control clamp mechanism to release a spring-loaded pawl to stop the front clamping roller The group continues to move forward under the push of the nose wheel of the aircraft, and the lift arm is lifted upward together with the clamped nose wheel of the aircraft through the force of the stopper. During the traction process, the nose wheel of the aircraft tends 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

[0007]The other nose wheel holding device mostly adopts the roller holding device, because the roller and the nose wheel are in line contact, it is easy to cause the side slip of the nose wheel, resulting in unsafe factor

And there is no clamp locking device after clamping, which may easily cause the clamping device to disengage due to side slipping and other reasons during the operation process, resulting in safety accidents

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