Multi-functional ground-air transfer support vehicle

Abstract

The present invention discloses a multi-functional ground-air transfer support vehicle, which includes a frame body. The frame body is connected to a lifting component, and the lifting components are evenly distributed around the frame body. The lifting component is connected to a roller, and the lifting component can adjust the height of the roller so that the roller can contact or suspend from the ground, thereby making the frame body suspend from or contact the ground. A traction component is arranged at the front end of the frame body. The traction component can be connected to a traction device to provide power for the support vehicle. The other end of the traction component is connected to a steering component, and the steering component is connected to the lifting component at the front end of the frame body. The traction component can drive the steering component to rotate, thereby driving the lifting component to rotate to change the moving direction of the roller. The gap between the tray of the multi-functional ground-air transfer support vehicle of the present invention and the ground can be adjusted, overcoming the problem that it is inconvenient to move at the folded convex angle position between the helicopter cabin door ramp and the cabin floor. In addition, by adjusting the lifting component, the tray can be placed flat on the cabin floor, improving the stability of the goods.

Description

Technical Field

[0001] The present invention relates to the field of helicopter transportation, and particularly to a multi-functional ground-air transfer support vehicle. Background Art

[0002] Helicopter air transportation has the advantages and characteristics of fast operation speed, strong obstacle-crossing ability, and high social and economic benefits. Especially for short and medium distances, it can accurately achieve point-to-point direct transportation. However, due to the small cabin door of the transport helicopter, low load-bearing capacity of the tail ramp, insufficient local load-bearing capacity of the inner floor of the cabin, and low tail wing, the existing loading and unloading equipment and tools (such as cranes and forklifts) cannot meet the loading and unloading requirements of heavy goods with large volume and weight. Therefore, there is an urgent need for a support vehicle for ground-air transfer to solve the above major technical problems and safely and reliably achieve the loading, unloading, and transportation of heavy goods on the helicopter.

[0003] An ordinary walking pallet can only achieve the function of transportation. Even if the goods are transported into the cabin, due to the movement of the support vehicle itself and the high center of gravity of the goods, during the helicopter transportation process, the support vehicle is prone to move due to the action of inertia, causing potential safety hazards. At the same time, the space in the cabin is narrow, and the steering function of the ordinary support vehicle is insufficient and it cannot move flexibly. Therefore, the ordinary support vehicle cannot meet the loading and unloading requirements of the transport helicopter. Summary of the Invention

[0004] The present invention provides a multi-functional ground-air transfer support vehicle, which has the effect of quickly and efficiently loading and unloading heavy materials. The specific technical solutions are as follows:

[0005] A multi-functional ground-air transfer support vehicle, which includes a frame body. The frame body is connected to a lifting component. The lifting components are evenly distributed around the frame body. The lifting component is connected to a roller. The lifting component can adjust the height of the roller so that the roller can contact or suspend from the ground, thereby making the frame body suspend or contact with the ground. A traction component is arranged at the front end of the frame body. The traction component can be connected to a traction device to provide power for the support vehicle. The other end of the traction component is connected to a steering component. The steering component is connected to the lifting component at the front end of the frame body. The traction component can drive the steering component to rotate, thereby driving the lifting component to rotate to change the moving direction of the roller.

[0006] Further, the lifting component includes a housing, a gear set, a screw rod, and a rocker. The housing is fixedly connected to the frame body. One end of an output rod is arranged in the housing and connected to the screw rod. The other end of the output rod is connected to the roller. The screw rod is connected to the gear set. The gear set is connected to the rocker. Rotating the rocker can drive the screw rod to rotate, thereby driving the output rod to stretch relative to the housing to realize the adjustment of the roller height.

[0007] Furthermore, the output rod includes a threaded sleeve and a roller support rod. The threaded sleeve is a hollow rod body and is accommodated in the housing. At the central position of the top of the threaded sleeve, a screw connection part extends inward. At the central position of the screw connection part, a threaded hole matching the screw is provided. Rotating the screw can drive the threaded sleeve to move up and down in the housing. The bottom of the threaded sleeve is snap-connected with the roller support rod, and the bottom of the roller support rod is connected with the roller.

[0008] Furthermore, at one end of the roller support rod connected to the threaded sleeve, a snap connection part is provided. The diameter of the snap connection part is larger than that of the roller support rod. The bottom of the threaded sleeve is connected with a sleeve end cover. A through hole is provided at the central position of the sleeve end cover. The sleeve end cover is sleeved on the roller support rod. A spring is arranged in the threaded sleeve. One end of the spring is sleeved on the outside of the screw connection part and abuts against the inner wall of the top of the threaded sleeve, and the other end of the spring abuts against the snap connection part. Under the elastic force of the spring, the snap connection part abuts against the sleeve end cover to realize the connection between the roller support rod and the threaded sleeve.

[0009] Furthermore, the gear set is arranged at the top in the housing. The gear set includes a first bevel gear and a second bevel gear. The first bevel gear and the second bevel gear are meshed. The rocker is fixedly connected with the second bevel gear and coaxially arranged. The first bevel gear is fixedly connected with the screw and coaxially arranged. The screw is accommodated in the threaded sleeve and is threadedly connected with the screw connection part. Rotating the rocker drives the second bevel gear to rotate, thereby driving the first bevel gear to rotate and further driving the screw to rotate. The rotation of the screw can drive the threaded sleeve to move up and down, so as to realize the telescoping of the output rod.

[0010] Furthermore, one end of the roller support rod away from the housing is connected with a roller bracket, and rollers are arranged on the roller bracket. The roller support rod is connected with a steering assembly, and the steering assembly can drive the roller support rod to rotate, thereby driving the rollers to rotate to change the moving direction of the rollers.

[0011] Furthermore, the steering assembly is fixedly arranged at the front end of the frame body. The steering assembly includes a steering fixed rod, and the steering fixed rod is fixedly connected with the frame body. Steering connection parts are arranged on both sides of the steering fixed rod. The housing of the lifting assembly is fixedly connected with the steering connection parts. The steering connection parts are provided with rod accommodation holes. The roller support rod is accommodated in the rod accommodation holes. The roller support rod can rotate relative to the steering connection parts. A steering arm is arranged in the steering connection parts. The steering arm is connected with the roller support rod. Driving the steering arm to rotate can drive the roller support rod to rotate, and further drive the rollers to rotate to change the moving direction of the rollers.

[0012] Further, the steering assembly includes a guide rod. One end of the steering arm is hinged to the guide rod, and the other end is fixedly connected to the roller support rod. The guide rod is connected to the driving arm. A steering shaft is passed through the middle position of the fixed rod. One end of the steering shaft is connected to the traction assembly, and the other end is connected to the driving arm. The end of the driving arm away from the steering shaft is connected to the middle position of the guide plate. When the traction assembly rotates, it can drive the steering shaft to rotate, thereby driving the guide plate to move through the driving arm, and further driving the steering arm to rotate to change the moving direction of the roller.

[0013] Further, the traction assembly includes a traction arm. A first mounting lug is provided at the end of the traction arm, and a second mounting lug is provided on the steering shaft. The first mounting lug is hinged to the second mounting lug to realize the connection between the traction assembly and the steering shaft.

[0014] Further, a traction ring is provided at the end of the traction arm away from the steering assembly. The traction ring can be connected to a traction device to provide power for the support vehicle. A handrail is provided at a position near the traction ring of the traction arm, which can facilitate manual pulling of the support vehicle to move. A brake handle is provided below the handrail. The brake handle is connected to a brake through a brake wire, and the brake is connected to the roller to facilitate braking of the support vehicle.

[0015] The gap between the tray of the multi-functional ground-air transfer support vehicle of the present invention and the ground can be adjusted arbitrarily, overcoming the problem that it is inconvenient to move at the folded convex angle position between the helicopter cabin door ramp and the cabin floor. In addition, by adjusting the lifting assembly, the tray can be placed flat on the cabin floor, reducing the center of gravity of the goods and improving the stability of the goods. At the same time, by setting the steering assembly and the braking device, the support vehicle can move flexibly, and the smooth loading of heavy goods onto the transport helicopter can be ensured with a small number of personnel operating. Moreover, the support vehicle can be transported together with the helicopter, and the heavy goods can be loaded and unloaded at any time and anywhere, effectively ensuring the timeliness and safety requirements for loading and unloading heavy goods on the helicopter.

[0016] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following specifically gives the specific embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0018] Figure 1 is a perspective view of the multi-functional ground-air transfer support vehicle of the present invention;

[0019] Figure 2 Side view of the lifting component of the multi-functional ground-air transfer support vehicle of the present invention;

[0020] Figure 3 Cross-sectional view of the lifting component of the multi-functional ground-air transfer support vehicle of the present invention;

[0021] Figure 4 Stereogram of the roller support rod of the multi-functional ground-air transfer support vehicle of the present invention;

[0022] Figure 5 Exploded view of the output rod of the multi-functional ground-air transfer support vehicle of the present invention;

[0023] Figure 6 Stereogram of the steering component of the multi-functional ground-air transfer support vehicle of the present invention Figure 1 ;

[0024] Figure 7 Stereogram of the steering component of the multi-functional ground-air transfer support vehicle of the present invention Figure 2 ;

[0025] Figure 8 Stereogram of the steering arm of the multi-functional ground-air transfer support vehicle of the present invention;

[0026] Figure 9 Stereogram of the traction component of the multi-functional ground-air transfer support vehicle of the present invention;

[0027] Figure 10 Stereogram of the connection between the braking system and the rollers of the multi-functional ground-air transfer support vehicle of the present invention;

[0028] Figure 11 Schematic diagram of the retraction of the braking execution unit of the brake of the braking system of the multi-functional ground-air transfer support vehicle of the present invention;

[0029] Figure 12 Schematic diagram of the extension of the braking execution unit of the brake of the braking system of the multi-functional ground-air transfer support vehicle of the present invention;

[0030] Figure 13 Cross-sectional view of the connection between the brake of the braking system and the rollers of the multi-functional ground-air transfer support vehicle of the present invention;

[0031] Figure 14 Cross-sectional view of the braking execution unit of the brake of the braking system of the multi-functional ground-air transfer support vehicle of the present invention. Detailed implementation manner

[0032] In order to better understand the purpose, function and specific design of the present invention, the multi-functional ground-air transfer support vehicle of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] As Figures 1-14 shown, the multi-functional ground-air transfer support vehicle of the present invention includes a frame body 1. A tray 11 for loading goods is provided on the frame body 1. The frame body 1 is connected to a lifting assembly 2. The lifting assemblies 2 are evenly distributed around the frame body 1. The lifting assembly 2 is connected to a roller 3. The lifting assembly 2 can adjust the height of the roller 3 so that the roller 3 can contact or be suspended from the ground, thereby making the frame body 1 suspended from or in contact with the ground; a traction assembly 4 is provided at the front end of the frame body 1. One end of the traction assembly 4 is provided with a traction ring 41. The traction ring 41 can be connected to a traction device to provide power for the support vehicle. The other end of the traction assembly 4 is connected to a steering assembly 5. The steering assembly 5 is connected to the front lifting assembly 2. The traction assembly 4 can drive the steering assembly 5 to rotate, thereby driving the lifting assembly 2 to rotate to change the moving direction of the roller 3, so as to realize the steering function of the support vehicle.

[0034] Specifically, as Figures 2-5 shown, the lifting assembly 2 includes a housing 21, a gear set 22, a screw 23 and a rocker 24. The housing 21 is fixedly connected to the frame body 1. One end of an output rod 25 is arranged in the housing 21 and connected to the screw 23. The other end of the output rod 25 is connected to the roller 3. The screw 23 is connected to the gear set 22. The gear set 22 is connected to the rocker 24. Rotating the rocker 24 can drive the screw 23 to rotate, thereby driving the output rod 25 to expand and contract relative to the housing 21 to adjust the height of the roller 3.

[0035] The output rod 25 includes a threaded sleeve 26 and a roller support rod 27. The threaded sleeve 26 is a hollow rod body. One end of the threaded sleeve 26 is accommodated in the housing 21 and can expand and contract relative to the housing 21, but cannot rotate axially relative to the housing 21. For example, long protrusions are arranged along the length direction on the inner side wall of the housing 21, and long grooves are arranged on the outer surface of the corresponding threaded sleeve 26. The cooperation between the long protrusions and the long grooves can realize the function that the threaded sleeve 26 can expand and contract relative to the housing 21, but cannot rotate axially relative to the housing 21. In addition, it can also be that a groove is opened in the vertical direction on the side wall of the threaded sleeve 26, and then a threaded hole is drilled on the housing 21 and a positioning screw is connected. The positioning screw is slidably matched with the groove on the side wall of the threaded sleeve 26, so as to ensure the up and down lifting movement of the threaded sleeve 26 as a whole in the housing 21.

[0036] At the top center position of the threaded sleeve 26, a screw rod connecting portion 261 extends inward. At the center position of the screw rod connecting portion 261, a threaded hole matching the screw rod 23 is provided. Rotating the screw rod 23 can drive the threaded sleeve 26 to move up and down within the housing 21. A roller support rod 27 is snap-connected to the bottom of the threaded sleeve 26. The bottom of the roller support rod 27 is connected to the roller 3. The roller support rod 27 can rotate axially relative to the threaded sleeve 26 and can move up and down relative to the housing 21 along with the threaded sleeve 26.

[0037] Specifically, one end of the roller support rod 27 connected to the threaded sleeve 26 is provided with a snap connection portion 271. The diameter of the snap connection portion 271 is larger than that of the roller support rod 27. The bottom of the threaded sleeve 26 is connected to a sleeve end cover 262. A through hole is provided at the center position of the sleeve end cover 262. The sleeve end cover 262 is sleeved on the roller support rod 27, and the roller support rod 27 can rotate relative to the sleeve end cover 262; a spring 28 is arranged inside the threaded sleeve 26. One end of the spring 28 abuts against the outer side of the screw rod connecting portion 261 and the inner wall of the top of the threaded sleeve 26, and the other end of the spring 28 abuts against the snap connection portion 271. Under the elastic force of the spring 28, the snap connection portion 271 abuts against the sleeve end cover 262 to realize the connection between the roller support rod 27 and the threaded sleeve 26, that is, the roller support rod 27 can rotate axially relative to the threaded sleeve 26 and can move up and down relative to the housing 21 along with the threaded sleeve 26. Preferably, a rubber gasket is arranged between the snap connection portion 271 and the sleeve end cover 262 to reduce the noise generated by the friction or collision between the snap connection portion 271 and the sleeve end cover 262. In addition, by arranging the spring 28, when transporting goods, the roller support rod 27 can slide relatively inside the threaded sleeve 26, thereby playing a buffering role, and the roller 3 can play a shock-absorbing role when rolling on the ground. Preferably, a buffer limiting portion 275 is arranged at the top of the roller support rod 27. The buffer limiting portion 275 includes a screw rod receiving groove. The screw rod 23 can be inserted into the screw rod receiving groove and abut against the buffer limiting portion 275 to limit the buffer distance of the roller support rod 27.

[0038] Preferably, a bearing seat 272 is arranged on the snap connection portion 271. A bearing is arranged inside the bearing seat 272. The bearing is connected to the roller support rod 27, and the roller support rod 27 can rotate relative to the bearing. A baffle 29 is arranged at one end of the bearing away from the bearing seat 272. The spring 28 abuts against the baffle 29. Under the elastic force of the spring 28, the bearing is fixed inside the bearing seat 272, and the snap connection portion 271 abuts against the sleeve end cover 262 to realize the connection between the roller support rod 27 and the threaded sleeve 26. By adding a bearing, the roller support rod 27 is easier to rotate, thus facilitating the steering assembly 5 to drive the roller 3 to rotate.

[0039] The gear set 22 is arranged at the top inside the housing 21. The gear set 22 includes a first bevel gear 221 and a second bevel gear 222. The first bevel gear 221 and the second bevel gear 222 are meshed. The rocker 24 is fixedly connected to the second bevel gear 222 and is coaxially arranged. The first bevel gear 221 is fixedly connected to the screw 23 and is coaxially arranged. The screw 23 is accommodated in the threaded sleeve 26 and is threadedly connected to the screw connection part 261. Rotating the rocker 24 drives the second bevel gear 222 to rotate, thereby driving the first bevel gear 221 to rotate and further driving the screw 23 to rotate. The rotation of the screw 23 can drive the threaded sleeve 26 to move up and down, thereby realizing the telescoping of the output rod 25.

[0040] One end of the roller support rod 27 far from the housing 21 is connected to the roller bracket 31. A roller 3 is arranged on the roller bracket 31. In this embodiment, the roller support rod 27 is connected to the steering assembly 5. The steering assembly 5 can drive the roller support rod 27 to rotate, thereby driving the roller bracket 31 to rotate and further driving the roller 3 to rotate to change the moving direction of the roller 3.

[0041] Specifically, one end of the roller support rod 27 far from the housing 21 is provided with a bracket connection part 273. The diameter of the bracket connection part 273 is smaller than that of the roller support rod 27, so as to form a shoulder at the position where the bracket connection part 273 is connected to the roller support rod 27. The cross-section of the bracket connection part 273 is polygonal. A rod connection hole matching the shape of the bracket connection part 273 is arranged on the corresponding roller bracket 31. A snap ring groove is arranged at the end of the bracket connection part 273. The bracket connection part 273 can pass through the rod connection hole on the roller bracket 31 and make the shoulder on the roller support rod 27 abut against the roller bracket 31. Connecting a snap ring in the snap ring groove can realize the connection between the roller support rod 27 and the roller bracket 31.

[0042] Preferably, one side of the roller 3 is connected to the brake 61. The brake 61 is connected to the brake wire 62. The brake wire 62 is connected to the brake handle 63. The brake handle 63 is fixedly arranged on the traction assembly 4. Pressing the brake handle 63 can realize the braking of the roller 3 to facilitate the parking of the support vehicle.

[0043] As Figures 6-9 shown, the steering assembly 5 is fixedly arranged at the front end of the frame body 1. The steering assembly 5 includes a steering fixed rod 51. The steering fixed rod 51 is fixedly connected to the frame body 1. Steering connection parts 52 are arranged on both sides of the steering fixed rod 51. The housing 21 of the lifting assembly 2 is fixedly connected to the steering connection parts 52. The steering connection parts 52 are provided with rod accommodation holes. The roller support rod 27 is accommodated in the rod accommodation holes. The roller support rod 27 can rotate relative to the steering connection parts 52. A steering arm 53 is arranged inside the steering connection parts 52. The steering arm 53 is connected to the roller support rod 27. Driving the steering arm 53 to rotate can drive the roller support rod 27 to rotate and further drive the roller 3 to rotate to change the moving direction of the roller 3.

[0044] The steering connection part 52 is provided with a steering arm receiving groove 54 in the horizontal direction. The steering arm 53 can be received in the steering arm receiving groove 54 and connected to the roller support rod 27. By providing the steering arm receiving groove 54, the position of the steering arm 53 in the vertical direction can be restricted, so that the rotation of the steering arm 53 in the horizontal direction is smoother.

[0045] It should be noted that a plurality of limiting grooves 274 are vertically and evenly distributed on the outer surface of the roller support rod 27. A roller support rod mounting hole 531 is provided at one end of the steering arm 53 connected to the roller support rod 27. A plurality of limiting protrusions 532 matching the shape of the limiting grooves 274 are provided in the roller support rod mounting hole 531. The roller support rod 27 can be inserted into the roller support rod mounting hole 531 to realize the connection between the roller support rod 27 and the steering arm 53. The cooperation between the limiting grooves 274 and the limiting protrusions 532 can limit the steering arm 53 from rotating axially relative to the roller support rod 27, so that the steering arm 53 works more reliably.

[0046] The steering assembly 5 further includes a guide rod 55. One end of the steering arm 53 is hinged to the guide rod 55 and the other end is fixedly connected to the roller support rod 27. The guide rod 55 is connected to the driving arm 56, and the driving arm 56 is connected to the traction assembly 4. The traction assembly 4 can drive the guide rod 55 to move through the driving arm 56, thereby driving the steering arm 53 to rotate to change the moving direction of the roller 3.

[0047] In the middle position of the steering fixing rod 51 of this embodiment, a steering shaft 57 is passed through. One end of the steering shaft 57 is connected to the traction assembly 4, and the other end is connected to the driving arm 56. The end of the driving arm 56 far from the steering shaft 57 is connected to the middle position of the guide rod 55. When the traction assembly 4 rotates, it can drive the steering shaft 57 to rotate, thereby driving the guide rod 55 to move through the driving arm 56, and further driving the steering arm 53 to rotate to change the moving direction of the roller 3.

[0048] The traction assembly 4 includes a traction arm 42. A first mounting lug 421 is provided at the end of the traction arm 42. A second mounting lug 571 is provided on the steering shaft 57. The first mounting lug 421 is hinged to the second mounting lug 571 to realize the connection between the traction assembly 4 and the steering shaft 57. A traction ring 41 is provided at the end of the traction arm 42 far from the steering assembly 5. The traction ring 41 can be connected to a traction device to provide power for the support vehicle. The traction device can be a winch, a tractor, etc. A handrail 43 is provided at a position of the traction arm 42 close to the traction ring 41. The handrail 43 can facilitate manual pulling of the support vehicle to move. A brake handle 63 is provided below the handrail 43. The brake handle 63 is connected to the brake 61 on the roller 3 through a brake wire 62. Holding the brake handle 63 tightly can realize the braking of the support vehicle.

[0049] Specifically, as Figures 10-14As shown, the brake 61 includes a brake drive unit 64, a brake transmission unit 65 and a brake execution unit 66. The brake drive unit 64 is hinged to the brake housing 67. One end of the brake drive unit 64 is connected to the brake line 62, and the other end is connected to the brake transmission unit 65. The brake transmission unit 65 is connected to the brake execution unit 66. The brake transmission unit 65 and the brake execution unit 66 are accommodated in the brake housing 67. Pulling the brake line 62 can rotate the brake drive unit 64 to drive the brake transmission unit 65 to rotate, thereby driving the brake execution unit 66 to extend to lock the roller 3.

[0050] The brake drive unit 64 includes a driving shaft 641, one end of which is connected to a brake wire fixing member 642, and the brake wire fixing member 642 is used to fix the brake wire 62; the other end of the driving shaft 641 is connected to a driving wheel 643, and a driving claw 644 is provided on the side wall of the driving wheel 643. Pulling the brake wire 62 can make the brake wire fixing member 642 drive the driving shaft 641 to rotate, thereby driving the driving wheel 643 to rotate, so that the driving claw 644 drives the brake transmission unit 65 to rotate.

[0051] The brake transmission unit 65 includes a transmission ring 651, which is arranged at the center position of the brake housing 67 and can rotate relative to the brake housing 67. A transmission connecting rod 652 is hinged on the transmission ring 651, and the transmission connecting rod 652 is connected to the brake execution unit 66. The rotation of the transmission ring 651 can drive the brake execution unit 66 to extend through the transmission connecting rod 652 to lock the roller 3.

[0052] In this embodiment, a transmission claw 653 is disposed on the side wall of the transmission ring 651 . The transmission claw 653 is in conflict with the driving claw 644 . The driving wheel 643 rotates so that the driving claw 644 drives the transmission claw 653 to move, thereby driving the transmission ring 651 to rotate.

[0053] Preferably, the transmission claw 653 is connected to the reset assembly 68, and the reset assembly 68 includes a spring, one end of the spring is fixedly connected to the brake housing 67, and the other end is connected to the transmission claw 653. When the brake handle 63 is released, the reset assembly 68 can reset the transmission claw 653, thereby rotating the transmission ring 651 to retract the extended brake execution unit 66 and release the lock on the roller 3.

[0054] The brake housing 67 is provided with an actuator accommodation groove 671. The brake actuator 66 is movably arranged in the actuator accommodation groove 671. The brake actuator 66 includes a brake rod 661 and a brake sleeve 662. The brake rod 661 is clamped with the brake sleeve 662. A sleeve connecting column is arranged on the outer wall of the brake sleeve 662, and the sleeve connecting column is hinged to the transmission connecting rod 652. The transmission ring 651, the transmission connecting rod 652 and the brake sleeve 662 form a crank connecting rod mechanism. By rotating the transmission ring 651, the transmission connecting rod 652 can drive the brake sleeve 662 to move in the actuator accommodation groove 671 so that the brake rod 661 extends or contracts, thereby realizing the locking or unlocking of the roller 3.

[0055] A clamping flange 663 is arranged at one end of the brake rod 661. The clamping flange 663 is clamped in the brake sleeve 662. A brake block 664 is arranged at the other end of the brake rod 661. The brake block 664 is used to lock the roller 3. Preferably, the surface of the brake block 664 in contact with the roller 3 is arc-shaped to increase the contact area with the roller 3, thereby improving the braking effect.

[0056] It should be noted that a compression spring 69 is arranged in the brake sleeve 662. One end of the compression spring 69 is connected to the clamping flange 663, and the other end is connected to the brake sleeve 662 to realize the clamping of the brake rod 661 and the brake sleeve 662. The compression spring 69 can provide buffering for the brake rod 661 to prevent the roller 3 from being locked. In addition, the compression spring 69 can also protect the braking system from being damaged during overload.

[0057] Preferably, in order to improve the braking effect, multiple groups of brake actuators 66 can be arranged. In this embodiment, there are three groups, and the three groups of brake units are evenly distributed around the brake transmission unit 65.

[0058] When the multi-functional ground-air transfer support vehicle of the present invention is in use, adjust the lifting assembly 2 so that the output rod 25 is in the contraction limit state. At this time, the roller 3 is retracted, and the frame 1 falls to the ground. At this time, the support vehicle cannot move. Lift the container loaded with materials onto the pallet of the support. After completing the loading operation of the container, adjust the lifting assembly 2 again to make the output rod 25 extend, and the roller 3 rises to adjust the shipping height of the frame 1 so that the support vehicle can perform transportation operations on the ground, a slope with a certain gradient or a track. When the container is transported to the designated position inside the cabin, by adjusting the lifting assembly 2, the height of the frame 1 is reduced and it falls onto the cabin floor to complete the loading of the container. At this time, the support vehicle cannot move. The helicopter transports the support vehicle and the container to the destination together, and then adjusts the lifting assembly 2 to make the output rod 25 extend, and the roller 3 rises to transport the support vehicle and the container together out of the cabin to the designated unloading position. Adjust the lifting assembly 2 to make the output rod 25 in the contraction limit state. At this time, the roller 3 is retracted, and the frame 1 falls to the ground. At this time, the support vehicle cannot move, and the container can be hoisted and unloaded.

[0059] The gap between the tray of the multi-functional ground-air transfer support vehicle of the present invention and the ground can be adjusted arbitrarily, overcoming the problem that it is inconvenient to move at the folding convex angle position between the helicopter cabin door ramp and the cabin floor; in addition, by adjusting the lifting assembly, the tray can be placed flat on the cabin floor, reducing the center of gravity of the goods and improving the stability of the goods; at the same time, by setting the steering assembly and the braking device, the support vehicle can move flexibly, and with a small number of personnel operating, it can ensure the smooth loading of heavy goods onto the transport helicopter, and the support vehicle can be transported together with the helicopter, and the heavy goods can be loaded and unloaded at any time and anywhere, effectively ensuring the timeliness and safety requirements for loading and unloading heavy goods on the helicopter.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A multi-functional ground-air transfer support vehicle, characterized in that, it includes a frame body, on which there is a tray for loading goods. The frame body is connected to a lifting component, and the lifting components are evenly distributed around the frame body. The lifting component is connected to a roller, and the lifting component can adjust the height of the roller so that the roller can contact or be suspended from the ground, thereby making the frame body suspended from or in contact with the ground; the lifting component includes a housing, the housing is fixedly connected to the frame body, an output rod is arranged in the housing, one end of the output rod is connected to a screw rod, the other end of the output rod is connected to the roller, the screw rod is connected to a gear set, the gear set is connected to a rocker, and rotating the rocker can drive the screw rod to rotate to drive the output rod to extend and retract relative to the housing to realize the adjustment of the roller height; the output rod includes a threaded sleeve and a roller support rod. The threaded sleeve is a hollow rod body, the threaded sleeve is accommodated in the housing, a screw rod connecting part extends inward at the center position of the top of the threaded sleeve, and a threaded hole matching the screw rod is arranged at the center position of the screw rod connecting part. Rotating the screw rod can drive the threaded sleeve to move up and down in the housing; a roller support rod is clamped at the bottom of the threaded sleeve, and the bottom of the roller support rod is connected to the roller; one end of the roller support rod connected to the threaded sleeve is provided with a clamping part, the diameter of the clamping part is larger than the diameter of the roller support rod, the bottom of the threaded sleeve is connected to a sleeve end cover, and a through hole is arranged at the center position of the sleeve end cover. The sleeve end cover is sleeved on the roller support rod; a spring is arranged in the threaded sleeve, one end of the spring is sleeved on the outside of the screw rod connecting part and abuts against the inner wall of the top of the threaded sleeve, the other end of the spring abuts against the clamping part, and under the elastic force of the spring, the clamping part abuts against the sleeve end cover to realize the connection between the roller support rod and the threaded sleeve; a traction component is arranged at the front end of the frame body, the traction component can be connected to a traction device to provide power for the support vehicle, the other end of the traction component is connected to a steering component, the steering component is connected to the lifting component at the front end of the frame body, and the traction component can drive the steering component to rotate so as to drive the lifting component to rotate to change the moving direction of the roller.

2. The multi-functional ground-air transfer support vehicle according to claim 1, characterized in that, the gear set is arranged at the top in the housing, the gear set includes a first bevel gear and a second bevel gear, the first bevel gear and the second bevel gear are meshed, the rocker is fixedly connected to the second bevel gear and coaxially arranged, the first bevel gear is fixedly connected to the screw rod and coaxially arranged, the screw rod is accommodated in the threaded sleeve and is threadedly connected to the screw rod connecting part. Rotating the rocker drives the second bevel gear to rotate, thereby driving the first bevel gear to rotate and further driving the screw rod to rotate. The rotation of the screw rod can drive the threaded sleeve to move up and down, thereby realizing the telescoping of the output rod.

3. The multi-functional ground-air transfer support vehicle according to claim 1, characterized in that, one end of the roller support rod away from the housing is connected to a roller bracket, and rollers are arranged on the roller bracket; the roller support rod is connected to the steering component, and the steering component can drive the roller support rod to rotate, thereby driving the roller to rotate to change the moving direction of the roller.

4. The multi-functional ground-air transfer support vehicle according to claim 1, characterized in that, The steering assembly is fixedly arranged at the front end of the frame body. The steering assembly includes a steering fixed rod, which is fixedly connected to the frame body. Steering connection parts are arranged on both sides of the steering fixed rod. The housing of the lifting assembly is fixedly connected to the steering connection parts. The steering connection parts are provided with rod accommodating holes, and the roller support rods are accommodated in the rod accommodating holes. The roller support rods can rotate relative to the steering connection parts. Steering arms are arranged inside the steering connection parts. The steering arms are connected to the roller support rods. Driving the rotation of the steering arms can drive the rotation of the roller support rods, and further drive the rotation of the rollers to change the moving direction of the rollers.

5. The multi-functional ground-air transfer support vehicle according to claim 4, characterized in that the steering assembly includes a guide rod. One end of the steering arm is hinged to the guide rod and the other end is fixedly connected to the roller support rod. The guide rod is connected to the driving arm; a steering shaft is passed through the middle position of the fixed rod. One end of the steering shaft is connected to the traction assembly and the other end is connected to the driving arm. The end of the driving arm far from the steering shaft is connected to the middle position of the guide plate. When the traction assembly rotates, it can drive the rotation of the steering shaft, thereby driving the movement of the guide plate through the driving arm, and further driving the rotation of the steering arm to change the moving direction of the rollers.

6. The multi-functional ground-air transfer support vehicle according to claim 1, characterized in that the traction assembly includes a traction arm. A first lifting lug is arranged at the end of the traction arm. A second mounting lug is arranged on the steering shaft. The first mounting lug is hinged to the second mounting lug to realize the connection between the traction assembly and the steering shaft.

7. The multi-functional ground-air transfer support vehicle according to claim 6, characterized in that a traction ring is arranged at the end of the traction arm far from the steering assembly. The traction ring can be connected to a traction device to provide power for the support vehicle; a handrail is arranged at a position of the traction arm close to the traction ring. The handrail can facilitate manual pulling of the support vehicle to move; a brake handle is arranged below the handrail. The brake handle is connected to a brake through a brake wire. The brake is connected to the rollers to facilitate braking of the support vehicle.

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