A helicopter ground handling vehicle

Abstract

The invention discloses a ground van for a helicopter. The ground van is provided with a chassis. Front wheels and rear wheels are installed at the two ends of the chassis respectively. A lifting platform is arranged on the chassis in a rotating mode. The bottom of the lifting platform is connected with the chassis in a rotating mode. At least four tongs are arranged on the lifting platform. A lifting device comprises a lead screw and a sleeve. The lead screw is located in the lifting device and can rotate, the lead screw drives the sleeve to stretch out or draw back, the whole lifting device is driven by a drive motor, gear transmission is adopted between the drive motor and the lifting device, telescopic lifting is achieved through rotation between the lead screw and the sleeve, and therefore the lifting device is driven to rotate to achieve rotating lifting. The drive motor drives the lifting platform to ascend or descend in a rotating mode by means of multi-stage gear transmission, the size of gears is small, the structure of the whole device can be reduced, and the ground van can be applied to the helicopter with small belly space. The lead screw and the sleeve are matched for stretching out or drawing back, a hydraulic structure can be prevented from failing suddenly and descending rapidly, and it is avoided that due to accidents, the helicopter is damaged.

Description

technical field [0001] The invention relates to the technical field of transport machinery, in particular to a helicopter ground transport vehicle. Background technique [0002] For helicopters with skid-type landing gear, such as the SA341 Gazelle helicopter, they cannot walk independently and need to use other auxiliary handling devices to move, dragging the helicopter to the hangar or outdoor airport or other locations. The Gazelle Helicopter is a light helicopter with an empty weight of 917kg and a maximum take-off weight of 1900kg, with a skid-type landing gear. The usual handling method is to install a wheel on the skids on both sides of the helicopter, and then one person pushes down the tail of the helicopter, using the wheels as a fulcrum to lift the aircraft off the ground, and then two people push forward on the sides of the helicopter. In order to allow the helicopter to move on the ground; when the aircraft moves to the destination, manpower is required to disa...

AI Technical Summary

Problems solved by technology

However, the hydraulic cylinder needs electro-hydraulic conversion, resulting in low energy conversion efficiency

In order to position the piston rod, it is necessary to install a valve on the pipeline and close it when it stops, otherwise the hydraulic cylinder will be retracted unexpectedly due to the backflow of hydraulic oil; there are many external components in the system, and the manufacturing cost is high, and the hydraulic oil needs to be replaced regularly during use. Otherwise, it is easy to cause the hydraulic system to fail.

In addition, the hydraulic system also has safety risks. The piston inside the hydraulic cylinder will cause wear and tear during long-term use, and there will be internal leakage of hydraulic oil, resulting in reduced thrust or failure of the push rod. fall, causing damage

[0004] The Gazelle helicopter is a small machine, the lowest point of the belly is only 20cm from the ground, and the mass can reach 1500kg after being fully loaded with oil. The general hydraulic power unit is relatively large, and it is difficult to place it well under the belly

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