CN219115727U

CN219115727U - Ground idle load loading and unloading platform applied to helicopter

Info

Publication number: CN219115727U
Application number: CN202223034621.0U
Authority: CN
Inventors: 付强; 任洪鹏; 费允锋; 吴昊
Original assignee: PLA Rocket Force Engineering Design Research Institute
Current assignee: PLA Rocket Force Engineering Design Research Institute
Priority date: 2022-11-14
Filing date: 2022-11-14
Publication date: 2023-06-02
Anticipated expiration: 2032-11-14

Abstract

The utility model discloses a ground idle loading and unloading platform applied to a helicopter, which comprises a walking component, a lifting component and a tray component, wherein the walking component can drive the tray component to move, and the lifting component can change the height of the tray component relative to the walking component so as to form a cabin door accommodating space; when loading goods into the helicopter, the cabin door can be accommodated in the cabin door accommodating space, so that the tray assembly is erected above the cabin door and is of a telescopic structure, and the tray assembly can push the goods into the helicopter or take the goods out of the helicopter so as to realize loading and unloading of the goods. The ground idle loading and unloading platform applied to the helicopter improves the flexibility of the device during transportation by utilizing the steerable walking assembly; the lifting mechanism is adopted, so that the tray component is erected on the cabin door ramp, the load of the cabin door ramp is reduced, the cabin door is effectively protected from being damaged, and the loading, unloading and transportation of heavy goods on the helicopter are safely and reliably realized.

Description

Ground idle load loading and unloading platform applied to helicopter

Technical Field

The utility model relates to the field of helicopter transportation, in particular to a ground idling loading and unloading platform applied to a helicopter.

Background

The helicopter has the advantages and characteristics of high operation speed, strong obstacle crossing capability and high social and economic benefits, and particularly can accurately realize point-to-point direct transportation at a medium and short distance.

However, the cargo transportation of the helicopter cabin has a certain specificity in the loading and unloading environment, and has the characteristics of small cabin door loading and unloading entrance, low tail wing height (limiting the action space of hoisting and transporting equipment), low bearing capacity of the tail cabin door and the ramp plate of the cabin, difficulty in using wheel type transportation and the like. Therefore, when heavy goods need to be transported to the helicopter, general lifting and transporting devices such as a general transporting forklift and a general crane cannot meet the loading and unloading requirements. Therefore, in order to ensure that heavy goods can be smoothly loaded into or unloaded from the helicopter cabin, the utility model needs to provide a helicopter loading and unloading device capable of transporting the heavy goods, which solves the above-mentioned serious technical problems and safely and reliably realizes loading and unloading and transportation of the heavy goods on the helicopter.

Disclosure of Invention

The utility model provides a ground idle loading and unloading platform applied to a helicopter, which has the effect of safely and reliably realizing loading and unloading and transportation of heavy goods on the helicopter. The specific technical scheme is as follows:

the ground idle loading and unloading platform comprises a walking assembly, a lifting assembly and a tray assembly, wherein the walking assembly is connected with one end of the lifting assembly, the other end of the lifting assembly is connected with the tray assembly, the walking assembly can drive the tray assembly to move, and the tray assembly can bear goods; the lifting assembly can change the height of the tray assembly relative to the walking assembly so as to form a cabin door accommodating space; when loading goods into the helicopter, the cabin door ramp can be accommodated in the cabin door accommodating space, so that the tray assembly is erected above the cabin door ramp and comprises a tray, and the lower surface of the front end of the tray is provided with an auxiliary wheel which can be abutted against the cabin door ramp to assist the tray to lift; the pallet component is of a telescopic structure, and can push goods into the helicopter or take the goods out of the helicopter so as to realize loading and unloading of the goods.

Further, the walking components are two groups, the two groups of walking components are respectively connected with the tray component through the lifting component, and the distance between the two groups of walking components is larger than the width of the cabin door, so that the walking components can walk on two sides of the cabin door ramp and loading and unloading can be completed.

Further, the walking assembly comprises a walking bracket, a walking wheel and a steering driving element are respectively arranged at the front end and the rear end of the walking bracket, the steering driving element is connected with the walking wheel, and the steering driving element can drive the walking wheel to rotate relative to the walking bracket so as to change the walking direction.

Further, the travelling wheel comprises a roller fixing frame, roller fixing lifting lugs are formed on the two sides of the roller fixing frame in a downward extending mode, the roller fixing lifting lugs are connected with a roller shaft, rollers are sleeved on the roller shaft, and the rollers are arranged between the two roller fixing lifting lugs; the center position of the roller fixing frame is fixedly provided with a connecting shaft, the connecting shaft is connected with a steering driving element, and the steering driving element drives the roller fixing frame and the rollers to integrally rotate through the connecting shaft.

Further, be provided with first lift holding tank on the walking support, be provided with the second on the tray subassembly and go up and down the holding tank, lift subassembly's both ends set up respectively in first lift holding tank and second lift holding tank, but the accommodation is in first lift holding tank and second lift holding tank when lifting subassembly is folding to reduce the occupation space of lifting subassembly.

Further, the lifting assembly comprises a first lifting arm, a second lifting arm and a lifting driving element, wherein the first lifting arm is hinged with the second lifting arm, one end of the first lifting arm, which is far away from the second lifting arm, is hinged with the walking support, one end of the second lifting arm, which is far away from the first lifting arm, is hinged with the tray assembly, the lifting driving element is arranged on the walking support, an output shaft of the lifting driving element is connected with the second lifting arm, and the second lifting arm can be driven to move by the expansion of the output shaft of the lifting driving element, so that the lifting assembly is unfolded or folded.

Further, the tray assembly comprises a tray, the tray comprises a fixed tray, a conveying tray and a bearing tray, the fixed tray is connected with the lifting assembly, and the second lifting accommodating groove is formed in the fixed tray; a conveying tray is movably arranged above the fixed tray and can move relative to the fixed tray; the carrying tray is movably arranged above the conveying tray, and can move relative to the conveying tray so as to realize the telescopic function of the tray assembly.

Further, guide rails are arranged on two sides of the bottom surface of the conveying tray, guide rail grooves matched with the guide rails are formed in the upper portion of the fixed tray, conveying driving elements are arranged below the fixed tray and connected with the conveying tray, and the conveying driving elements can drive the conveying tray to move along the length direction of the guide rails.

Further, a guide flange is arranged at the middle position below the bearing tray, a guide groove matched with the guide flange is arranged above the conveying tray, a bearing driving element is arranged below the conveying tray, the bearing driving element is connected with the bearing tray, and the bearing driving element can drive the bearing tray to move relative to the conveying tray.

The ground idle loading and unloading platform applied to the helicopter is ingenious in structural design, and the flexibility of the device in transportation is greatly improved by utilizing the steerable traveling assembly; the lifting mechanism is adopted, so that the tray component is erected on the cabin door ramp, the load of the cabin door ramp is reduced, and the cabin door is effectively protected from being damaged; the liftable tray component improves the effective conveying range of the device in the engine room, and safely and reliably realizes loading, unloading and transportation of heavy goods on the helicopter.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a perspective view of an initial state of a pallet assembly of a ground-free loading dock of the present utility model as applied to a helicopter;

FIG. 2 is a schematic view of the utility model in a state of extension of a transport pallet of a ground idle loading dock for a helicopter;

FIG. 3 is a schematic view of the utility model in a state of extension of a carrying tray of a ground-free loading dock for a helicopter;

FIG. 4 is a schematic view of the lift assembly of the present utility model as folded for use with a ground-free loading dock of a helicopter;

FIG. 5 is a schematic view 1 of the lift assembly of the present utility model as deployed for use with a ground-free loading dock of a helicopter;

FIG. 6 is a perspective view of a lift assembly of the present utility model applied to a ground-free loading dock of a helicopter;

FIG. 7 is a schematic view of the lift assembly of the present utility model as deployed for use with a ground-free loading dock of a helicopter;

FIG. 8 is a schematic view of the utility model applied to an idle ground loading dock of a helicopter with an auxiliary wheel abutting a hatch ramp;

FIG. 9 is a schematic view 1 of the pallet assembly of the present utility model applied to a ground-free loading dock of a helicopter with the pallet assembly fully extended;

fig. 10 is a schematic view 2 of the pallet assembly of the present utility model applied to a ground-free loading dock of a helicopter when fully extended.

Detailed Description

For a better understanding of the objects, functions and specific embodiments of the present utility model, a ground-free loading platform for a helicopter according to the present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-10, the ground idle loading and unloading platform applied to the helicopter comprises a walking component 1, a lifting component 2 and a tray component 3, wherein the walking component 1 is connected with one end of the lifting component 2, the other end of the lifting component 2 is connected with the tray component 3, the walking component 1 can drive the tray component 3 to move, and the tray component 3 can bear cargoes; the lifting assembly 2 can change the height of the tray assembly 3 relative to the walking assembly 1 to form a cabin door accommodating space; when loading goods into the helicopter, the cabin door can be accommodated in the cabin door accommodating space, so that the tray assembly 3 is erected above the cabin door, the tray assembly 3 is of a telescopic structure, and the tray assembly 3 can push the goods into the helicopter or take the goods out of the helicopter so as to realize loading and unloading of the goods.

Specifically, as shown in fig. 4-5, the two sets of walking components 1 in this embodiment are respectively connected with the tray component 3 through the lifting component 2, and the distance between the two sets of walking components 1 is greater than the width of the cabin door, so that the walking components 1 can walk on two sides of the cabin door ramp and complete loading and unloading. The walking assembly 1 comprises a walking bracket 11, wherein the front end and the rear end of the walking bracket 11 are respectively provided with a walking wheel 12, and the walking wheels 12 can rotate relative to the walking bracket 11 so as to change the walking direction. The front end and the rear end of the walking bracket 11 are respectively provided with a steering driving element 13, and the steering driving element 13 is connected with the walking wheels 12 to drive the walking wheels 12 to steer, so that the flexibility of the walking assembly 1 is improved, and the loading and unloading of cargoes are facilitated.

The travelling wheel 12 comprises a roller fixing frame 14, roller fixing lifting lugs are formed by extending downwards from two sides of the roller fixing frame 14, through holes are formed in the roller fixing lifting lugs, the roller fixing lifting lugs are connected with a roller shaft, a roller 15 is sleeved on the roller shaft, and the roller 15 is arranged between the two roller fixing lifting lugs; a connecting shaft is fixedly arranged at the central position of the roller fixing frame 14 and is connected with the steering driving element 13, and the steering driving element 13 drives the roller fixing frame 14 and the roller 15 to integrally rotate through the connecting shaft. The steering driving element 13 of the present embodiment may be a hydraulic rotary cylinder, and it will be appreciated that other high torque rotary driving elements commonly used in the market, such as a motor, a cylinder, an electric cylinder, etc., may be used.

One end of the roller shaft is connected with a walking driving element 16, and the walking driving element 16 can drive the roller 15 to rotate so as to realize a walking function. The travel drive element 16 of the present embodiment includes a motor and a speed reducer, the motor being connected to the speed reducer, the speed reducer being connected to the roller shaft. The motor drives the roller 15 to rotate through the speed reducer. Preferably, the walking driving element 16 is connected to a motor bracket 17, and the motor bracket 17 is connected to the roller fixing frame 14 or the connecting shaft, so as to fix the walking driving element 16.

The walking bracket 11 is provided with a first lifting accommodating groove 18, the tray component 3 is provided with a second lifting accommodating groove 34, two ends of the lifting component 2 are respectively arranged in the first lifting accommodating groove 18 and the second lifting accommodating groove 34, and the lifting component 2 can be accommodated in the first lifting accommodating groove 18 and the second lifting accommodating groove 34 when being folded so as to reduce the occupied space of the lifting component 2. Preferably, two first lifting accommodating grooves 18 are provided on the walking support 11 in this embodiment, which are respectively disposed at the front end and the rear end of the walking support 11, and the front end and the rear end of the walking support 11 are respectively connected with a lifting assembly 2, so as to improve the stability of the tray assembly 3 during lifting.

As shown in fig. 6 to 7, the lifting assembly 2 comprises a first lifting arm 21, a second lifting arm 22 and a lifting driving element 23, the first lifting arm 21 is hinged with the second lifting arm 22, one end of the first lifting arm 21 away from the second lifting arm 22 is hinged with the walking bracket 11, one end of the second lifting arm 22 away from the first lifting arm 21 is hinged with the tray assembly 3, the lifting driving element 23 is arranged on the walking bracket 11, an output shaft of the lifting driving element 23 is connected with the second lifting arm 22, and the second lifting arm 22 can be driven to move by the expansion and contraction of the output shaft of the lifting driving element 23, so that the lifting assembly 2 is unfolded or folded, and the lifting of the tray assembly 3 is realized. The lifting drive element 23 of the present embodiment is a hydraulic cylinder, and it is understood that the lifting drive element 23 may be a cylinder, an electric cylinder, or the like.

Preferably, the lifting drive element 23 is hinged in the first lifting receiving groove 18, and the lifting drive element 23 and the first lifting arm 21 are both rotatable relative to the walking bracket 11, so that the lifting drive element 23 and the first lifting arm 21 can be received in the first lifting receiving groove 18 when the lifting assembly 2 is folded. Specifically, a first hinge post is disposed in the first lifting accommodating groove 18 at a position close to the travelling wheel 12, and the first lifting arm 21 and the lifting driving element 23 are both hinged on the first hinge post, so as to realize rotation of the first lifting arm 21 and the lifting driving element 23 and the travelling bracket 11. A second hinge post is arranged in a second lifting accommodating groove 34 on the tray assembly 3, and the second lifting arm 22 is hinged with the second hinge post so as to realize the connection of the second lifting arm 22 and the tray assembly 3.

The first lifting arm 21 and the second lifting arm 22 are plate-shaped, a cylinder accommodating groove 24 is formed in the middle position of the first lifting arm 21 and the second lifting arm 22, and the lifting driving element 23 can be accommodated in the cylinder accommodating groove 24 so as to avoid interference between the lifting driving element 23 and the first lifting arm 21 or the second lifting arm 22 in the lifting process. A cylinder hinge post 25 is provided in the cylinder receiving groove 24 of the second elevating arm 22, and the elevating driving member 23 is hinged with the cylinder hinge post 25 to achieve connection of the elevating driving member 23 with the second elevating arm 22.

As shown in fig. 8, the tray assembly 3 includes a tray, an auxiliary wheel 35 is provided on the lower surface of the front end of the tray, the auxiliary wheel 35 can prevent the tray from directly striking the hatch ramp, and when the travelling mechanism reaches the position of the hatch ramp, the auxiliary wheel 35 can roll on the hatch ramp and assist the tray to lift as the travelling mechanism continues to travel to the helicopter. In addition, the auxiliary wheels 35 can tilt the tray, so that the cargo is tilted as a whole, to avoid interference between the top of the higher cargo and the top wall (triangular area) of the cabin door. Because the goods slope, therefore the tray rear end is provided with backstop portion to prevent that the goods from dropping because of gravity, it can be understood that also can adopt the mode fixed goods of ligature.

As shown in fig. 9 to 10, the tray includes a fixed tray 31, a conveying tray 32, and a carrying tray 33, the fixed tray 31 is connected to the elevation assembly 2, and a second elevation receiving groove 34 is provided on the fixed tray 31. A conveying tray 32 is movably arranged above the fixed tray 31, and the conveying tray 32 can move relative to the fixed tray 31; a carrying tray 33 is movably arranged above the conveying tray 32, and the carrying tray 33 can move relative to the conveying tray 32 so as to realize the telescopic function of the tray assembly 3.

Specifically, guide rails 321 are disposed on both sides of the bottom surface of the conveying tray 32, correspondingly, a guide rail groove 311 matched with the guide rail 321 is disposed above the fixed tray 31, a conveying driving element 36 is disposed below the fixed tray 31, the conveying driving element 36 is connected with the conveying tray 32, and the conveying driving element 36 can drive the conveying tray 32 to move along the length direction of the guide rail 321. Preferably, the guide rail 321 is provided with a guide wheel 322, and the guide wheel 322 can reduce friction between the guide rail 321 and the guide rail groove 311, so as to facilitate the movement of the conveying tray 32.

The front end of the conveying tray 32 of the present embodiment is provided with a conveying tray connecting plate 323, and the conveying tray connecting plate 323 is connected with the conveying driving element 36, so that the conveying driving element 36 can drive the conveying tray 32 to move. Preferably, the front end of the fixed tray 31 is provided with a connection plate accommodating groove 312, and the conveying tray connection plate 323 can be accommodated in the connection plate accommodating groove 312 to limit the retracted conveying tray 32, and simultaneously, the overall aesthetic property of the device when the conveying tray 32 is not extended can be improved. The conveying driving element 36 of the present embodiment is a hydraulic cylinder, and an output shaft of the hydraulic cylinder is connected to the conveying pallet connecting plate 323. It will be appreciated that the transport drive element 36 may also be a conventional drive element such as an air or electric cylinder.

The front end of the carrying tray 33 is provided with an auxiliary wheel 35, and the lower end of the auxiliary wheel 35 is lower than the lower surface of the fixed tray 31 so that the auxiliary wheel 35 can be in contact with the hatch ramp. The auxiliary wheel 35 of the present embodiment is provided in an auxiliary wheel fixing case 37, and the auxiliary wheel fixing case 37 is fixedly provided below the carrying tray 33. Preferably, the auxiliary wheels 35 and the auxiliary wheel fixing boxes 37 are two, and are respectively arranged at two sides below the bearing tray 33. Notably, the auxiliary wheels 35 contact the cabin floor when the transport pallet 32 and the carrying pallet 33 are extended to provide support to the transport pallet 32 and the carrying pallet 33 to increase the strength of the transport pallet 32 and the carrying pallet 33.

A guide flange 38 is arranged at the middle position below the bearing tray 33, correspondingly, a guide groove 324 matched with the guide flange 38 is arranged above the conveying tray 32, a bearing driving element 39 is arranged below the conveying tray 32, the bearing driving element 39 is connected with the bearing tray 33, and the bearing driving element 39 can drive the bearing tray 33 to move relative to the conveying tray 32. Preferably, the two bearing driving elements 39 of the present embodiment are respectively disposed at two sides below the conveying tray 32, and the output shafts of the bearing driving elements 39 are respectively connected with the side walls of the two auxiliary wheel fixing boxes 37. Preferably, the guide flange 38 is provided with a guide wheel 322, and the guide wheel 322 can reduce friction between the guide flange 38 and the guide groove 324 to facilitate movement of the carrying tray 33.

It should be noted that the front ends of the fixed tray 31 and the conveying tray 32 are provided with auxiliary wheel accommodating grooves 351, and the auxiliary wheels 35 can be accommodated in the auxiliary wheel accommodating grooves 351 to limit the retracted carrying tray 33, and at the same time, the overall aesthetic property of the device of the carrying tray 33 and the conveying tray 32 when not extending can be improved.

It is noted that a driving slot 313 is provided above the fixed tray 31, which is in shape-fit with the carrying driving element 39, and the carrying driving element 39 is movable in the driving slot 313 so that the carrying driving element 39 can move together with the conveying tray 32. The load-bearing driving element 39 is a hydraulic cylinder, and an output shaft of the hydraulic cylinder is connected with a side wall of the auxiliary wheel fixing box 37. It will be appreciated that the transport drive element 36 may also be a conventional drive element such as an air or electric cylinder.

The ground idle loading platform applied to the helicopter also comprises a controller, wherein the controller is connected with each driving element, and an operator can send instructions to the controller in a wireless or wired mode so as to control each driving element.

When the ground idle loading and unloading platform applied to the helicopter is used for loading cargoes into the helicopter, firstly, the cargoes are placed on the bearing tray 33, then the walking assembly 1 drives the tray and the cargoes to the position of the cabin door ramp, then the auxiliary wheel 35 is in conflict with the cabin door ramp, the walking assembly 1 continues to advance, the lifting assembly 2 and the auxiliary wheel 35 lift the tray assembly 3 and the cargoes together until the cargoes are sent to the cabin door, then the conveying tray 32 and the bearing tray 33 are sequentially extended to transport the cargoes into the helicopter, and a loader utilizes an unloading tool to unload the cargoes into the cabin of the helicopter. The unloading tool can be a jack, a chain block or an electric block and the like, the chain block or the electric block is arranged on a lifting point mooring ring at the top of a cabin of the helicopter, goods are lifted through the chain block or the electric block, the goods can be lifted up by adopting the jack if necessary, then a tray is pulled out, and the goods are placed on a cabin floor or a bearing plate special for placing the goods in the cabin, so that the loading of the goods is completed. When goods are required to be unloaded from the helicopter, the steps are reversely operated, and the description is omitted.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The ground idle loading and unloading platform is characterized by comprising a walking assembly, a lifting assembly and a tray assembly, wherein the walking assembly is connected with one end of the lifting assembly, the other end of the lifting assembly is connected with the tray assembly, the walking assembly can drive the tray assembly to move, and the tray assembly can bear goods; the lifting assembly can change the height of the tray assembly relative to the walking assembly so as to form a cabin door accommodating space; when loading goods into the helicopter, the cabin door ramp can be accommodated in the cabin door accommodating space, so that the tray assembly is erected above the cabin door ramp and comprises a tray, and the lower surface of the front end of the tray is provided with an auxiliary wheel which can be abutted against the cabin door ramp to assist the tray to lift; the pallet component is of a telescopic structure, and can push goods into the helicopter or take the goods out of the helicopter so as to realize loading and unloading of the goods.

2. The ground idle loading platform for a helicopter according to claim 1 wherein the number of the walking components is two, the two walking components are respectively connected with the tray component through the lifting component, and the distance between the two walking components is larger than the width of the cabin door, so that the walking components can walk on two sides of the cabin door ramp and complete loading and unloading.

3. The ground-free loading platform for a helicopter according to claim 2 wherein the traveling assembly comprises a traveling bracket, a traveling wheel and a steering driving element are respectively arranged at the front end and the rear end of the traveling bracket, the steering driving element is connected with the traveling wheel, and the steering driving element can drive the traveling wheel to rotate relative to the traveling bracket so as to change the traveling direction.

4. The ground-free loading platform for a helicopter according to claim 3, wherein the travelling wheel comprises a roller fixing frame, roller fixing lifting lugs are formed by extending downwards at two sides of the roller fixing frame, the roller fixing lifting lugs are connected with a roller shaft, rollers are sleeved on the roller shaft, and the rollers are arranged between the two roller fixing lifting lugs; the center position of the roller fixing frame is fixedly provided with a connecting shaft, the connecting shaft is connected with a steering driving element, and the steering driving element drives the roller fixing frame and the rollers to integrally rotate through the connecting shaft.

5. A ground idle load loading platform for a helicopter according to claim 3 and wherein a first lifting accommodating groove is arranged on the walking bracket, a second lifting accommodating groove is arranged on the tray component, two ends of the lifting component are respectively arranged in the first lifting accommodating groove and the second lifting accommodating groove, and the lifting component can be accommodated in the first lifting accommodating groove and the second lifting accommodating groove when being folded so as to reduce the occupied space of the lifting component.

6. The ground idle loading platform for a helicopter according to claim 5, wherein the lifting assembly comprises a first lifting arm and a second lifting arm, and a lifting driving element, the first lifting arm is hinged with the second lifting arm, one end of the first lifting arm far away from the second lifting arm is hinged with the walking bracket, one end of the second lifting arm far away from the first lifting arm is hinged with the tray assembly, the lifting driving element is arranged on the walking bracket, an output shaft of the lifting driving element is connected with the second lifting arm, and the second lifting arm can be driven to move by the expansion and contraction of the output shaft of the lifting driving element, so that the lifting assembly is unfolded or folded.

7. The ground-free loading platform for a helicopter according to claim 1 wherein the pallet assembly comprises a pallet comprising a fixed pallet, a delivery pallet and a load-bearing pallet, the fixed pallet being coupled to the lift assembly, the second lift-receiving slot being disposed on the fixed pallet; a conveying tray is movably arranged above the fixed tray and can move relative to the fixed tray; the carrying tray is movably arranged above the conveying tray, and can move relative to the conveying tray so as to realize the telescopic function of the tray assembly.

8. The ground idle loading platform for a helicopter according to claim 7, wherein guide rails are arranged on two sides of the bottom surface of the conveying tray, guide rail grooves matched with the guide rails are arranged above the fixed tray, conveying driving elements are arranged below the fixed tray and connected with the conveying tray, and the conveying driving elements can drive the conveying tray to move along the length direction of the guide rails.

9. The ground idle loading platform for a helicopter according to claim 8 wherein a guide flange is provided at a central position below the carrying tray, a guide groove is provided above the carrying tray to cooperate with the guide flange, a carrying drive element is provided below the carrying tray, the carrying drive element is connected to the carrying tray, and the carrying drive element is capable of driving the carrying tray to move relative to the carrying tray.