CN217673222U - Traction type heavy material loading and unloading device applied to helicopter - Google Patents

Abstract

The utility model discloses a traction type heavy material loading and unloading device applied to a helicopter, which comprises a track assembly and a transportation device, wherein the track assembly comprises a first track unit and a second track unit, the first track unit is detachably connected with a bottom plate of a helicopter cabin, the second track unit is detachably connected with a tail cabin door ramp of the helicopter, and the first track unit is communicated with the second track unit; the transportation device is detachably connected with the container filled with materials, and can move on the first track unit and the second track unit so as to realize loading and unloading of the container; and the cabin is also internally provided with a limiting assembly, the limiting assembly is connected with the track assembly, and the limiting assembly can limit the container in the cabin. The utility model has strong detachability, small volume of single component and convenient carrying; in addition, the reliability of heavy goods when transported by using the helicopter is effectively guaranteed by arranging the limiting assembly.

Description

Traction type heavy material loading and unloading device applied to helicopter

Technical Field

The utility model relates to a helicopter transportation field especially relates to a heavy material loading and unloading of towed carries device for helicopter.

Background

The helicopter air transportation has the advantages and characteristics of high operation speed, strong obstacle crossing capability and high social and economic benefits, particularly can accurately realize point-to-point direct transportation at medium and short distances. However, because the cabin door of the transportation helicopter is small, the ramp bearing capacity of the tail cabin door is low, the local bearing capacity of the bottom plate in the cabin is insufficient, and the tail wing is low, the existing loading and unloading equipment and tools (such as a crane and a forklift) cannot meet the loading and unloading requirements of heavy goods with large volume and weight, the utility model relates to a heavy goods loading and unloading and transportation guarantee device is urgently needed to be used, the above-mentioned major technical problem is solved, and the loading, unloading and transportation of the heavy goods on the helicopter are safely and reliably realized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be applied to heavy goods and materials loading and unloading of towed device of helicopter has the effect that can load and unload heavy goods and materials fast and efficiently. The specific technical scheme is as follows:

a traction type heavy material loading and unloading device applied to a helicopter comprises a track assembly and a transportation device, wherein the track assembly comprises a first track unit and a second track unit, the first track unit is detachably connected with a bottom plate of a cabin of the helicopter, the second track unit is detachably connected with a ramp of a tail cabin door of the helicopter, and the first track unit is communicated with the second track unit; the transportation device is detachably connected with the container filled with materials, and can move on the first track unit and the second track unit so as to realize loading and unloading of the container; be provided with spacing subassembly on the first track unit, spacing subassembly can carry on spacingly to the container to improve the stability of the container when the helicopter transported.

Furthermore, a winch is arranged on the track assembly, a traction rope is wound on the winch and can be connected with the container, and the winch can be used for dragging the container to move on the track assembly.

Furthermore, the first track unit comprises two first track beams, the two first track beams are connected with the first cross beam and the second cross beam to form a rectangular frame body, and the two first track beams are detachably arranged on a bottom plate of the helicopter cabin.

Further, the second track unit comprises two second track beams, the track assembly further comprises a connecting plate, and the first track beam and the second track beams are detachably connected through the connecting plate.

Further, the second track roof beam is including connecting portion, transportation portion and the supporting part that links to each other in order, and connecting portion link to each other with first track roof beam, and connecting portion and transportation portion are formed with the contained angle, and connecting portion parallel with the supporting part, and the supporting part links to each other with ground, and transportation portion sets up with tail cabin door ramp surface interval to prevent that the container from crushing tail cabin door.

Further, be provided with the limiting plate on first track roof beam and the second track roof beam, the limiting plate can restrict the position of conveyer on the track to prevent the conveyer derail.

Furthermore, the transportation device comprises four groups of roller assemblies, each roller assembly comprises a transportation support, each transportation support is provided with a socket, the bottom of the container is provided with a jack matched with the socket, and the socket can be inserted into the jack to realize the connection of the transportation device and the container.

Furthermore, the transportation device further comprises two threaded connecting rods, each threaded connecting rod is respectively connected with the two roller assemblies, and the two roller assemblies can be clamped by fastening the threaded connecting rods so as to improve the reliability of the roller assemblies in use and prevent the roller assemblies from being disconnected with the container.

Further, the transportation support links to each other with the jack subassembly, the jack subassembly includes, casing, gear train, output rod, screw rod and hand wheel, the casing is fixed continuous with the horizontal end of transportation support L type, the one end setting of output rod links to each other in the casing and with the screw rod, the other end of output rod links to each other with the gyro wheel, the screw rod links to each other with the gear train, the gear train links to each other with the hand wheel, rotatory hand wheel can drive the screw rod and rotate to the drive output rod is flexible for the shell, thereby the height of adjustable gyro wheel.

Further, the limiting assembly comprises a first limiting unit and a second limiting unit, the first limiting unit is arranged on the upper surface of the first track unit, and the first limiting unit can limit the moving limit position of the transportation device so as to prevent the transportation device from derailing from the container; the second limiting unit is detachably connected with the first track beam, and the container can be clamped by the second limiting unit to realize fixation of the container.

The utility model has strong detachability, small volume of single component, can be stored in the storage box, has strong transportation performance of the whole equipment, is convenient to carry, and can be transported along with the helicopter; in addition, the device can guarantee that heavy goods can be smoothly loaded on the transportation helicopter under the operation of a small amount of personnel, and is effective in limiting and fixing, so that the requirements of timeliness and safety of the transportation of the heavy goods by using the helicopter are effectively met.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

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 invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a perspective view of a heavy material loading and unloading device of the present invention applied to a helicopter;

FIG. 2 is a perspective view of the limiting assembly of the heavy material loading and unloading device of the present invention applied to a helicopter;

FIG. 3 is a schematic view of the installation of the track assembly of the heavy material loading and unloading device of the present invention applied to a helicopter;

FIG. 4 is a perspective view of the track assembly of the heavy material handling device of the present invention applied to a helicopter;

fig. 5 is a side view of a second rail unit of the heavy material loading and unloading device of the present invention applied to a helicopter;

FIG. 6 is a schematic view showing the connection state between the transportation device and the container of the heavy material loading and unloading device of the present invention;

fig. 7 is a perspective view 1 of the roller assembly of the traction type heavy material loading and unloading device applied to the helicopter of the present invention;

fig. 8 is a perspective view 2 of the roller assembly of the traction type heavy material loading and unloading device applied to the helicopter of the present invention;

fig. 9 is a schematic view of the connection between the transportation device and the container of the heavy material loading and unloading device of the present invention;

fig. 10 is a schematic connection diagram of the roller assembly and the threaded connection rod of the heavy material loading and unloading device of the present invention applied to a helicopter;

fig. 11 is a sectional view of a jack assembly of the heavy material loading and unloading device of the present invention applied to a helicopter;

fig. 12 is a schematic view of the heavy material loading and unloading device for a helicopter according to the present invention placed in the storage box.

Detailed Description

In order to better understand the purpose, function and specific design scheme of the present invention, the following description will be made in detail with reference to the accompanying drawings.

As shown in fig. 1-12, the heavy material loading and unloading device for helicopter of the present invention comprises a track assembly 1 and a transportation device 2, wherein the track assembly 1 is detachably connected to a bottom plate of a helicopter cabin and a tail cabin door ramp, the transportation device 2 is detachably connected to a container 4 containing materials, and the transportation device 2 can move on the track assembly 1 to transport the container 4 from the ground to the cabin or transport the container 4 from the cabin to the ground; still be provided with spacing subassembly 3 in the cabin, spacing subassembly 3 can carry on spacingly to container 4 in the cabin to improve the stability of container 4 when the helicopter transported, but the transportation of guarantee goods and materials safe and reliable is to the destination.

Specifically, as shown in fig. 1 to 5, the track assembly 1 includes a first track unit 11 and a second track unit 12, the first track unit 11 is detachably connected to a floor of a cabin of the helicopter, the second track unit 12 is detachably connected to a tail door ramp of the helicopter, and the first track unit 11 and the second track unit 12 are communicated with each other so that the container 4 can move on the first track unit 11 and the second track unit 12 to load and unload the container 4.

The first rail unit 11 includes two first rail beams 111, the first rail beam 111 has an i-shaped cross section, the two first rail beams 111 are connected to a first cross beam 112 and a second cross beam 113 to form a rectangular frame, and the two first rail beams 111 are detachably disposed on a bottom plate of the helicopter nacelle. Particularly, be provided with fixed subassembly 5 on the bottom plate of helicopter cabin, fixed subassembly 5 includes fixed plate 51, and the one end of fixed plate 51 links to each other with the bottom plate of cabin, and the other end of fixed plate 51 is provided with first fixed orifices, and is corresponding, is provided with the second fixed orifices on the first track roof beam 111, and first track roof beam 111 passes through the bolt with fixed plate 51 and realizes dismantling the connection.

As shown in fig. 4, a horizontal fixing plate is disposed at one end of the first track beam 111 connected to the first cross beam 112, the first cross beam 112 is connected to the horizontal fixing plate, and the first track beam 111 and the first cross beam 112 of this embodiment are detachably connected by bolts. The first beam 112 is provided with a winch 6, the winch 6 is fixedly installed on the first beam 112 through a bolt, a traction rope is wound on the winch 6 and can be connected with the container 4, and the winch 6 can pull the container 4 to move on the track assembly 1. The capstan 6 is preferably a manual-electric integrated capstan 6.

The one end that first track roof beam 111 and second crossbeam 113 link to each other is provided with vertical fixed plate 115, and second crossbeam 113 links to each other with vertical fixed plate 115, and second crossbeam 113 provides the holding power for two first track roof beams 111 to improve first track roof beam 111's stability. The first track beam 111 and the second cross beam 113 of the embodiment are detachably connected by bolts.

In addition, the placing direction and the placing position of the first track beam 111 can be quickly distinguished by arranging the horizontal fixing plate and the vertical fixing plate 115 on the first track beam 111, the installation efficiency of the first track beam 111 is effectively improved, and the first beam 112 is wide due to the fact that the safety winch 6 is needed on the first beam 112, and therefore the horizontal fixing plate is arranged, the stability of the first beam 112 can be improved, and the winch 6 can be conveniently installed on the first beam 112.

The second track unit 12 includes two second track beams 121, the cross section of the second track beam 121 is i-shaped, the two second track beams 121 are respectively connected to the two first track beams 111, specifically, the track assembly 1 further includes a connecting plate 13, and the first track beam 111 and the second track beam 121 are connected through the connecting plate 13; one end of the first track beam 111 connected with the second track beam 121 is provided with a first connecting hole, one end of the second track beam 121 connected with the first track beam 111 is provided with a second connecting hole, the connecting plate 13 is provided with a third connecting hole and a fourth connecting hole, and the first track beam 111, the second track beam 121 and the connecting plate 13 are detachably connected through bolts.

As shown in fig. 5, the second track beam 121 includes a connecting portion 122, a transporting portion 123 and a supporting portion 124, which are connected in sequence, the connecting portion 122 is connected to the first track beam 111, an included angle is formed between the connecting portion 122 and the transporting portion 123, the connecting portion 122 is parallel to the supporting portion 124, the supporting portion 124 is connected to the ground, and the transporting portion 123 is spaced from the ramp surface of the tail door to prevent the container 4 from crushing the tail door.

Preferably, a wedge-shaped supporting block 125 is arranged at a gap position between a position where the connecting portion 122 forms an included angle with the transporting portion 123 and the surface of the tailgate door ramp, and the wedge-shaped supporting block 125 can increase the contact area between the second track beam 121 and the surface of the tailgate door ramp, so that the stability of the second track beam 121 is improved, and the bearing capacity of the tailgate door ramp is also improved.

Preferably, the support portion 124 is connected to a ground support plate 126, and the ground support plate 126 can increase the contact area of the support portion 124 with the ground, thereby improving the stability of the second track beam 121 and the load-bearing capacity of the second track beam 121.

Preferably, at least one supporting cross-beam 127 is disposed between the two second rail beams 121, so that the two second rail beams 121 are more stable.

It should be noted that the first rail beam 111 and the second rail beam 121 are provided with the position limiting plate 14, and the position of the transportation device 2 on the rail can be limited by the position limiting plate 14 to prevent the transportation device 2 from derailing.

As shown in fig. 6-10, the transportation device 2 includes four sets of roller assemblies, each roller assembly includes a transportation bracket 21, the transportation bracket 21 is provided with a socket 22, correspondingly, the bottom of the container 4 is provided with a jack 41 matched with the socket 22, and the socket 22 can be inserted into the jack 41 to connect the roller assembly with the container 4; the transportation support 21 is connected with the jack assembly 8, the jack assembly 8 comprises a telescopic output rod 83, the lower end of the output rod 83 is connected with the roller 7, the height of the roller can be adjusted by the jack assembly 8, and the roller 7 can move on the ground or the track assembly 1 to realize the function of transporting the container 4.

Specifically, the transportation bracket 21 is of an inverted L shape, a horizontal end of the L shape is connected to the jack assembly 8, as shown in fig. 11, the jack assembly 8 further includes a housing 81, a gear set 82, a screw 84, and a hand wheel 85, the housing 81 is fixedly connected to the horizontal end of the L shape of the transportation bracket 21, one end of the output rod 83 is disposed in the housing 81 and connected to the screw 84, the other end of the output rod 83 is connected to the roller 7, the screw 84 is connected to the gear set 82, the gear set 82 is connected to the hand wheel 85, and the hand wheel 85 is rotated to drive the screw 84 to rotate, so that the output rod 83 is driven to extend and retract relative to the housing 81, and thus the height of the roller 7 is adjusted.

The output rod 83 is a hollow rod, one end of the output rod 83 is accommodated in the housing 81, and can move telescopically relative to the housing 81, but cannot rotate axially relative to the housing 81, for example, a long protrusion is arranged on the inner side wall of the housing 81 along the length direction, and a long strip-shaped groove is correspondingly arranged on the outer surface of the output rod 83, and the long strip-shaped protrusion and the long strip-shaped groove are matched to realize the function that the output rod 83 can move telescopically relative to the housing 81, but cannot rotate axially relative to the housing 81.

One end of the output rod 83 accommodated in the housing 81 is provided with a screw block 86, the screw block 86 is sleeved on the inner circumferential surface of the output rod 83, the screw block 86 is clamped with the output rod 83, the end of the output rod 83 of the embodiment is provided with a clamping block, and the screw block 86 is clamped in the output rod 83. The screw block 86 is movable in synchronization with the output rod 83 (the synchronization movement includes coaxial rotation and linear movement in the guide rod axial direction); the other end of the output rod 83 is provided with a connector 87 for hinging with the swing bracket 24.

The gear set 82 is arranged at the top of the shell 81, the gear set 82 comprises a first bevel gear 88 and a second bevel gear 89, the first bevel gear 88 is meshed with the second bevel gear 89, a hand wheel 85 is fixedly connected with and coaxially arranged with the second bevel gear 89, the first bevel gear 88 is fixedly connected with and coaxially arranged with the screw rod 84, the screw rod 84 is accommodated in the thread block 86 and is in threaded connection with the thread block 86, the hand wheel 85 is rotated to drive the second bevel gear 89 to rotate so as to drive the first bevel gear 88 to rotate and further drive the screw rod 84 to rotate, the screw rod 84 rotates to drive the thread block 86 to move up and down, and therefore the extension and retraction of the output rod 83 are achieved.

Preferably, the inner circumferential surface of the middle lower part of the output rod 83 is provided with an annular boss 331, the screw rod 84 is sleeved with the spring 9, the spring 9 is arranged in an annular cavity between the screw rod 84 and the output rod 83, one end of the spring 9 is abutted against the bottom of the thread block 86, the other end of the spring 9 is abutted against the annular boss 331 of the output rod 83, and by arranging the spring 9, when goods are hoisted, the output rod 83 can slide relatively in the shell 81, so that a buffering effect can be achieved, and a damping effect can be achieved during walking.

It should be noted that, as shown in fig. 7-8, the sockets 22 and the rollers 7 are respectively disposed at two sides of the vertical end of the L-shape, so as to prevent the rollers from interfering with the container after the roller assembly is inserted into the container 4, which may affect the normal operation of the rollers. Preferably, a reinforcing rib plate 7 is arranged at the vertical end of the L shape, the reinforcing rib plate 7 is arranged at one side of the socket 22, and the end face of the reinforcing rib plate 7 is flush with the end face of the horizontal end of the L shape, so that the contact area of the transportation support and the container 4 is increased, and the stability of the roller assembly is improved.

The roller assembly further comprises a swinging support 24, the swinging support 24 is an isosceles triangle, the vertex angle position of the isosceles triangle of the swinging support 24 is hinged to the lower end of the output rod 83, the swinging support 24 can rotate around the jack assembly 8, two base angles of the isosceles triangle of the swinging support 24 are respectively connected with one roller 7, and the roller 7 can be transported in a rolling mode on the ground, a slope with a certain gradient or a fixed track due to the fact that the swinging support 24 can rotate around the jack assembly 8.

Specifically, the swing bracket 24 includes two swing plates 241, the swing plates 241 are isosceles triangles, the two swing plates 241 are isosceles triangles, two base angle positions of the isosceles triangle of the swing plates 241 are respectively connected with a roller shaft, the roller 7 is sleeved on the roller shaft, and the roller 7 is accommodated between the two parallel swing plates 241 to improve the stability of the roller 7 during movement; the vertex angle position of the isosceles triangle of the swing plate 241 is connected with a swing pin shaft, and the swing pin shaft is hinged with the lower end of the output rod 83, so that the roller 7 can swing relative to the jack component 8 when moving, and the roller 7 can roll and transport on the ground, a slope with a certain gradient or a fixed track.

As shown in fig. 10, the roller assemblies further include two threaded connection rods 25, each threaded connection rod 25 is respectively connected to two roller assemblies, and fastening the threaded connection rods 25 can clamp the container 4 by two roller assemblies, so as to improve the reliability of the roller assemblies during use and prevent the roller assemblies from being disconnected from the container 4. The threaded connection rod 25 of this embodiment links to each other with the socket 22 on the transport support 21, is provided with the through-hole on the socket 22, and threaded connection rod 25 passes the through-hole and fixes through the nut to make two sets of roller assemblies press from both sides tight container 4, improve the reliability that roller assembly and container 4 are connected.

As shown in fig. 2, the stopping assembly 3 includes a first stopping unit 31 and a second stopping unit 32, the first stopping unit 31 is disposed on the upper surface of the first track unit 11, and the first stopping unit 31 can limit the moving limit position of the transportation device 2 to prevent the transportation device 2 from derailing from the container; the spacing unit 32 of second can be dismantled with first track roof beam 111 and be connected, and after conveyer 2 offseted with first spacing unit 31, reduced container 4's height through adjustment jack subassembly 8, until falling to the cabin bottom plate on, then the installation is adjusted the spacing unit 32 of second with chucking container 4, can realize the fixed of collection dress 4 to make things convenient for the transportation of container 4.

The utility model discloses a be applied to heavy material loading and unloading of towed of helicopter and carry device can place in the containing box when not using, conveniently carries, as shown in figure 12. When the helicopter is used, the assembling of equipment and the loading operation of the container 4 can be started after the helicopter is parked in place and the cabin door is opened, and the method comprises the following steps:

first step, draw out the approximate mounted position of first track unit 11 in the cabin inside, require track and cabin body centering as far as possible to make things convenient for the fastening of track and cabin wall, take out in the containing box the utility model discloses an equipment to put first track unit 11 in the department of drawing a line, connect first crossbeam 112 and second crossbeam 113, then install capstan winch 6.

And secondly, installing the first track unit 11, adjusting and fixing the first track unit, so that the first track beam 111 and the second track beam 121 are integrally stable and do not shake. And then the second track unit 12 is attached.

And thirdly, transporting the container 4 to the tail to ensure that the placement position of the central axis of the container 4 is aligned with the central axis of the track assembly 1 (by using a pull line, a mark or a laser lead). The 4 roller assemblies are respectively mounted at the lower forklift hole positions (i.e., the holes 41) of the container 4 and then tightened by the screw connection rods 25. The jack assembly 8 is then adjusted to extend the output rod 83 and the rollers 7 are raised to adjust the shipping height of the container 4 so that the container 4 can be transported on the ground, a grade slope or a track.

Fourthly, the container 4 is pushed to the position of the second rail unit 12 and is attached to the second rail beam 121, and the traction rope of the winch 6 is connected to the handle at the front end of the container 4. The towing container 4 is slowly moved on the rail to the cabin marking position by shaking the winch.

Fifthly, after the container 4 reaches the position of the first limiting unit 31, the height of the container 4 is lowered by adjusting the jack assembly 8 until the container falls onto the bottom plate of the cabin, then the second limiting unit 32 is adjusted to clamp the container 4, then the second track unit 12 is detached and the containing box is put back, the cabin door is retracted, and the loading is completed.

The utility model has strong detachability, small volume of single component, can be stored in the storage box, has strong transportation performance of the whole equipment, is convenient to carry, and can be transported along with the helicopter; in addition, the device can guarantee that heavy goods can be smoothly loaded on the transportation helicopter under the operation of a small amount of personnel, and is effective in limiting and fixing, so that the requirements of timeliness and safety of the transportation of the heavy goods by using the helicopter are effectively met.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. A traction type heavy material loading and unloading device applied to a helicopter is characterized by comprising a track assembly and a transportation device, wherein the track assembly comprises a first track unit and a second track unit, the first track unit is detachably connected with a bottom plate of a cabin of the helicopter, the second track unit is detachably connected with a ramp of a tail cabin door of the helicopter, and the first track unit is communicated with the second track unit; the transportation device is detachably connected with the container filled with materials, and can move on the first track unit and the second track unit so as to realize loading and unloading of the container; be provided with spacing subassembly on the first track unit, spacing subassembly can carry on spacingly to the container in the cabin to improve the stability of the container when the helicopter transported.

2. A towed heavy material handling apparatus for a helicopter as claimed in claim 1 wherein said track assembly includes a winch having a tow rope wound thereon, said tow rope being adapted to be coupled to said container, said winch being adapted to tow said container to move on said track assembly.

3. The towed heavy material handling device for helicopters according to claim 1, wherein the first rail unit comprises two first rail beams, the two first rail beams are connected to the first cross member and the second cross member to form a rectangular frame, and the two first rail beams are detachably disposed on the floor of the helicopter nacelle.

4. The towed heavy material handling device for helicopters of claim 3, wherein the second track unit includes two second track beams, and the track assembly further includes a connecting plate, the first track beam and the second track beam being detachably connected by the connecting plate.

5. The towed heavy material loading and unloading device for helicopters according to claim 4, wherein the second rail beam includes a connecting portion, a transporting portion and a supporting portion connected in series, the connecting portion is connected to the first rail beam, the connecting portion forms an angle with the transporting portion, the connecting portion is parallel to the supporting portion, the supporting portion is connected to the ground, and the transporting portion is spaced from the surface of the ramp of the tail door to prevent the container from crushing the tail door.

6. The towed heavy material handling device for helicopters of claim 4 wherein the first and second rail beams have stop plates disposed thereon, the stop plates limiting the position of the transporter on the rails to prevent derailment of the transporter.

7. A heavy material handling device of the towed type for helicopters as claimed in claim 1, wherein the transportation device includes four sets of roller assemblies, the roller assemblies include a transportation bracket, the transportation bracket is provided with a socket, the bottom of the container is provided with a socket fitting with the socket, and the socket can be inserted into the socket to connect the transportation device and the container.

8. The towed heavy material handling device for helicopters according to claim 7, wherein the transportation device further comprises two threaded connection rods, each threaded connection rod is connected to two roller assemblies, and tightening the threaded connection rods causes the two roller assemblies to clamp the container, thereby improving reliability of the roller assemblies during use and preventing the roller assemblies from being disconnected from the container.

9. The towed heavy material handling device for helicopters of claim 7 wherein the transport support is connected to a jack assembly, the jack assembly comprising a housing, a gear train, an output rod, a screw, and a hand wheel, the housing being fixedly attached to the horizontal end of the transport support in the L-shape, one end of the output rod being disposed within the housing and connected to the screw, the other end of the output rod being connected to the roller, the screw being connected to the gear train, the gear train being connected to the hand wheel, rotation of the hand wheel driving rotation of the screw to thereby drive the output rod to telescope relative to the housing, thereby adjusting the height of the roller.

10. The towed heavy material loading and unloading device for helicopters according to claim 1, wherein the restraining assembly comprises a first restraining unit and a second restraining unit, the first restraining unit being disposed on an upper surface of the first track unit, the first restraining unit being capable of limiting an extreme position of movement of the transporter to prevent the transporter from derailing from the container; the second limiting unit is detachably connected with the first track beam, and the container can be clamped by the second limiting unit to realize fixation of the container.

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