Device and method for fixing heavy unmanned helicopter in vehicle compartment

Abstract

The present invention discloses a device for fixing a heavy-duty unmanned helicopter in a vehicle compartment, comprising a low-bed trailer, a locking device for the heavy-duty unmanned helicopter and a locking device for the low-bed trailer. Two pairs of wheels of the low-bed trailer are supported in the wheel grooves corresponding to the frames, respectively, and the lower edges of the wheels are against the bottom of the grooved guide rails of the vehicle compartment floor. The unmanned helicopter locking devices are respectively arranged on the longitudinal sides of the low-bed trailer, and the low-bed trailer locking devices are respectively arranged at the front and rear ends of the low-bed trailer and at positions corresponding to the vehicle compartment floor. The method comprises 1) the heavy-duty unmanned helicopter is fixed on the low-bed trailer, and 2) the low-bed trailer is fixed on the vehicle compartment floor after being moved into the vehicle compartment. The present invention has a compact structure and reliable locking, thereby ensuring the driving safety of a box-type transport vehicle loaded with a heavy-duty unmanned helicopter. Both locking and unlocking can be performed by hand, which further speeds up the operation speed of the present invention and improves the convenience of operation.

Description

Technical Field

[0001] The invention relates to a device for fixing an unmanned helicopter, in particular to a device and a method for fixing an unmanned helicopter in a compartment of a van, belonging to the technical field of integrated support for unmanned aerial vehicles. Background Art

[0002] At present, UAVs are increasingly used in many fields such as forest protection, oil pipeline inspection, geological exploration, etc. With the continuous improvement of UAV's endurance and airborne capacity, as well as the continuous expansion and improvement of its functions, the size and weight of UAVs have increased. For example, the mass of heavy unmanned helicopters is greater than 300kg, which puts forward new requirements for its transfer and transportation and other support tasks.

[0003] Before being transported by road, heavy-duty unmanned helicopters usually slide into the compartment of a van on their own landing gear, and lock their landing gear through a locking device to ensure transportation safety. However, due to the limited internal dimensions of the compartment, when a heavy-duty unmanned helicopter slides in the compartment, it is very likely to collide with the compartment wall and cause damage to the body, which is a relatively high risk. It is not very convenient to manually find the designated parking position of a heavy-duty unmanned helicopter, and locking the landing gear of a heavy-duty unmanned helicopter often requires special tools to complete, and the locking process is relatively cumbersome. In addition, since the landing gear of a heavy-duty unmanned helicopter is subjected to a large impact load when it lands, the landing gear on both sides will inevitably undergo plastic deformation after long-term use, resulting in an increase in the lateral span of the lower part of the landing gear, and the lateral spacing of the existing landing gear locking device cannot change, so the landing gear cannot be locked. Summary of the invention

[0004] The object of the present invention is to provide a heavy-duty unmanned helicopter fixing device in a vehicle compartment, which has a compact structure, is easy to use, and can lock the heavy-duty unmanned helicopter after the landing gear undergoes plastic deformation.

[0005] The present invention is achieved through the following technical solutions:

[0006] A heavy-duty unmanned helicopter fixing device in a vehicle compartment comprises a low-bed trailer, a heavy-duty unmanned helicopter locking device and a low-bed trailer locking device. The frame of the low-bed trailer is a rectangular steel structure welded by rectangular steel pipes, comprising longitudinal beams on both longitudinal sides of the frame and cross beams on both transverse ends of the frame, as well as a number of longitudinal bars and cross bars arranged at intervals and fixedly welded in the frame. Symmetrical wheel grooves are respectively arranged at both longitudinal ends of the frame, and two pairs of parallel wheels arranged at intervals are respectively supported in their corresponding wheel grooves through wheel axles, forming a low-bed trailer with an installation height lower than the height of the parallel wheels; a pair of sunken guide rail grooves are arranged on both sides of the longitudinal center line of the vehicle compartment floor, and groove-shaped guide rails with flanges on both sides are respectively fixed in the guide rail grooves, and the lower edges of the wheels are against the bottom of the groove-shaped guide rails; the unmanned helicopter locking devices are respectively arranged on the expandable landing gear support platforms on both longitudinal sides of the low-bed trailer, and the low-bed trailer locking devices are respectively arranged at the front and rear ends of the low-bed trailer and at positions corresponding to the vehicle compartment floor.

[0007] The purpose of the present invention can be further achieved by the following technical measures.

[0008] Furthermore, expandable landing gear support platforms are respectively provided on both longitudinal sides of the frame, and the expandable landing gear support platform includes a longitudinal support rod and several telescopic sleeve beams, one end of several telescopic sleeve beams arranged at intervals is vertically fixed and welded to the longitudinal support rod, and the other ends of several telescopic sleeve beams are respectively extended into the longitudinal beams on both sides of the frame, and the telescopic sleeve beams are locked by screws; a V-shaped guide groove for supporting the landing gear of a heavy unmanned helicopter is provided on the upper side of the longitudinal support rod, and the length of the V-shaped guide groove matches the length of the lower rod of the heavy unmanned helicopter landing gear.

[0009] Furthermore, detachable handrails are respectively provided on the four corners of the frame, and the lower ends of the detachable handrails are respectively inserted into corresponding sleeves on the crossbeam, and the lower ends of the detachable handrails are locked in the corresponding sleeves by elastic cross pins.

[0010] Furthermore, the heavy-duty unmanned helicopter locking device is respectively arranged at intervals at the two ends of the lower rods on both sides of the heavy-duty unmanned helicopter landing gear and on the longitudinal support rods of the corresponding expandable landing gear support platform, including an articulated seat, an upper pressure block, a wear-resistant pad and a tightening handle. The articulated seat is vertically fixed on the top surface of one side of the longitudinal support rod and is located outside one side of the V-shaped guide groove; an arc-shaped recess is provided on the lower side of the upper pressure block, and the arc-shaped wear-resistant pad is fixed in the arc-shaped recess of the upper pressure block, and the arc shape of the wear-resistant pad matches the cross-section of the lower rod of the heavy-duty unmanned helicopter landing gear; one end of the upper pressure block is connected to the articulated seat through a hinge The connecting pin is hinged, and the other end of the upper pressure block is vertically fixedly connected to one side of the upper part of the tightening handle. A number of vertical notches are provided on the other side of the longitudinal support rod, and the vertical notches correspond to the lower position of the tightening handle, and the hook seat of the tightening handle is fixed in the vertical notches; when the heavy-duty unmanned helicopter locking device is in use, the lower side of the lower rod is respectively supported in the V-shaped guide groove of the corresponding longitudinal support rod, the wear-resistant pads of the upper pressure block respectively press the upper side of the corresponding position of the lower rod, and the lower ends of the hooks at the lower part of the tightening handle are respectively hooked on the corresponding hook seats, thereby fixing the landing gear of the heavy-duty unmanned helicopter to the longitudinal support rods on both sides of the frame.

[0011] Furthermore, the locking device of the low-bed trailer includes a pair of guide mechanisms, spring latches and tightening handles, wherein the guide mechanisms are symmetrically arranged at a position corresponding to the middle outer side of the cross beam at the front end of the frame and the floor of the vehicle compartment in the direction of the vehicle head, i.e., the middle outer side of the cross beam at the front end of the frame, and the floor of the vehicle compartment, and include a guide pin and a guide seat, one end of the guide pin is symmetrically fixed on one side of the middle of the cross beam at the front end of the frame, and the guide seat corresponds to the position of the guide pin and is respectively fixed on the floor of the vehicle compartment; when the low-bed trailer is locked, the middle outer side of the cross beam at the front end of the frame abuts against a pair of guide seats, and the guide pins are respectively inserted into the corresponding guide seats. The upper part of the spring latch is symmetrically fixed on the outer side of the middle part of the crossbeam at the rear end of the frame away from the front of the vehicle, that is, the limit seat corresponds to the position of the spring latch, and is respectively embedded and fixed on the corresponding positions of the car floor; the upper part of the tightening handle is symmetrically fixed on the outer sides of both ends of the crossbeam at the rear end of the frame and the positions corresponding to the car floor, and the ground seat is symmetrically embedded and fixed on the car floor corresponding to the position of the tightening handle; when the low-bed trailer is locked, the lower ends of the spring latch are automatically inserted into the corresponding limit seats; the lower ends of the hooks at the lower part of the tightening handle are respectively hooked on the hook seats in the corresponding ground seats.

[0012] Furthermore, a second spring latch is provided to prevent the low-bed trailer from sliding off the hydraulic tail board. The second spring latch is located between a pair of spring latches. The upper part of the second spring latch is fixed to the outer side of the middle part of the crossbeam at the rear end of the frame. The limit block is fixed to the outer end of the hydraulic tail board away from the car body and corresponds to the position of the lower end of the second spring latch. When the low-bed trailer moves to the outer end of the hydraulic tail board, the lower end of the second spring latch abuts against one side of the limit block.

[0013] A method for using a heavy-duty unmanned helicopter fixing device in a vehicle compartment comprises the following steps:

[0014] 1) A heavy-duty unmanned helicopter enters the carriage. First, rotate the hydraulic tail plate outside the double doors at the rear end of the carriage from a vertical state to a horizontal state, then open the double doors at the rear end of the carriage, and then adjust the pair of grooved guide rails of the hydraulic tail plate to a position flush with the bottom of the pair of grooved guide rails on the carriage floor; then pull up the spring latches symmetrically arranged in the middle of the crossbeam at the rear end of the frame, so that the lower ends of the spring latches are separated from the corresponding limit seats; at the same time, loosen the tensioning handles at both ends of the crossbeam at the rear end of the frame, so that the lower ends of the hooks at the bottom of the tensioning handles are separated from the hook seats in the corresponding ground seats, thereby releasing the fixed connection between the frame and the carriage floor; then, by pushing each detachable handrail, roll the pairs of wheels on both sides of the low-bed trailer along the grooved guide rails into the pair of grooved guide rails of the hydraulic tail plate; then pull the elastic horizontal latch to remove the detachable handrail;

[0015] 2) The heavy-duty unmanned helicopter is fixed on the low-bed trailer, the hydraulic tail plate is lowered to the ground, and the top rotor of the heavy-duty unmanned helicopter that has been parked on the ground is removed; then the wheels at the front of the landing gear of the heavy-duty unmanned helicopter are pulled down with the force rods to support them on the ground, so that the heavy-duty unmanned helicopter can be pushed to the low-duty trailer, and the lower rods on both sides of the landing gear of the heavy-duty unmanned helicopter are pushed into the V-shaped guide grooves of the longitudinal support rods on both sides of the frame; then the upper pressure blocks are flipped over to press the lower rods, and the tightening handle is pulled forward so that the lower ends of the hooks at the lower part of the tightening handle are hooked on the corresponding hook seats to lock the upper pressure blocks, thereby fixing the landing gear of the heavy-duty unmanned helicopter on the longitudinal support rods on both sides of the frame; then the lower ends of the detachable handrails are respectively inserted into the corresponding sleeves on the crossbeams, and the lower ends of the detachable handrails are locked in the corresponding sleeves through elastic cross pins;

[0016] 3) After the low-bed trailer is moved into the carriage, it is fixed on the carriage floor, and the detachable handrails are pushed so that the low-bed trailer and the heavy-duty unmanned helicopter loaded thereon are moved into the carriage from the hydraulic tail plate under the support and guidance of the wheels mounted on both sides of the frame, until the outer side of the middle part of the crossbeam at the front end of the frame abuts against a pair of guide seats, at which time the guide pins are respectively inserted into the corresponding guide seats; at the same time, the lower end of the spring pin on the middle part of the crossbeam at the rear end of the frame automatically extends into the corresponding limit seat on the carriage floor under the action of the elastic force of the compression spring; then the tightening handles at both ends of the crossbeam at the rear end of the frame are pulled forward respectively, so that the lower end of the hook at the lower part of the tightening handle hooks the hook seat in the corresponding ground seat, thereby fixing the low-bed trailer on the carriage floor; finally, the double-opening door at the rear end of the carriage is closed, and the hydraulic tail plate is retracted to a vertical state, and the van transport vehicle loaded with the heavy-duty unmanned helicopter can be started for transfer transportation.

[0017] The invention has a compact structure and reliable locking, and realizes unimpeded loading and unloading of heavy-duty unmanned helicopters. The low-bed trailer supported by several pairs of wheels has a large carrying capacity. During operation, the heavy-duty unmanned helicopter is first quickly fixed on the low-bed trailer, and then the low-bed trailer is pushed into a special van transport vehicle and quickly fixed on the floor of the vehicle compartment, which is convenient and quick to operate. The heavy-duty unmanned helicopter locking device of the invention adopts a combination of several upper pressing blocks of an articulated structure and a V-shaped guide groove of a longitudinal support rod, and uses a tightening handle to lock the upper pressing block that has pressed the landing gear of the heavy-duty unmanned helicopter. The locking is firm and reliable, and the heavy-duty unmanned helicopter will not leave the low-bed trailer. The expandable landing gear support platform on both sides of the low-duty trailer can change the spacing of the V-shaped guide grooves on both sides of the frame, so that the landing gear of the heavy-duty unmanned helicopter with an increased lateral span after long-term use can also be locked on the low-duty trailer. The guide mechanism of the low-duty trailer locking device of the invention provides precise guidance for the automatic locking of the spring latch at the rear end of the low-duty trailer, and several tightening handles firmly fix the low-duty trailer on the floor of the vehicle compartment. Even if the road the vehicle is traveling on is very bumpy and vibrates greatly, the heavy unmanned helicopter and the low-bed trailer remain fixed on the floor of the vehicle compartment, ensuring the safe driving of the van transport vehicle loaded with the heavy unmanned helicopter. The locking and unlocking of the tightening handle and the spring latch can be operated by hand without using any tools, which further speeds up the operation speed of the present invention and improves the convenience of operation.

[0018] Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a heavy unmanned helicopter fixed on a low-bed trailer entering a special van from a hydraulic tailgate;

[0020] Figure 2 is a perspective view of a low bed trailer of the present invention;

[0021] Figure 3 yes Figure 2 Stereoscopic image rotated 180°;

[0022] Figure 4 yes Figure 2 AA section enlarged view;

[0023] Figure 5 It is a partial enlarged schematic diagram of the landing gear of a heavy unmanned helicopter fixed on a low-bed trailer;

[0024] Figure 6 yes Figure 3 A magnified view of part I;

[0025] Figure 7 yes Figure 2 Partial view in direction B. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and an embodiment in which the present invention is installed in a special van transport vehicle.

[0027] In the description of the present invention, terms indicating orientation or position such as "front", "rear", "up", "down", "left" and "right" are based on the orientation shown in the drawings and are only for simplifying the description, and do not indicate or imply that the present invention must have a specific orientation or position.

[0028] like Figure 1 to Figure 4 As shown, this embodiment includes a low-bed trailer 1, a heavy-duty unmanned helicopter locking device 2 and a low-bed trailer locking device 3. The frame 11 of the low-bed trailer 1 is a rectangular steel structure welded by rectangular steel pipes, which has good strength and rigidity; it includes longitudinal beams 111 on both sides of the frame 11 in the longitudinal direction and cross beams 112 on both ends of the frame 11 in the transverse direction, as well as a plurality of longitudinal rods 113 and cross rods 114 arranged at intervals and fixedly welded in the frame 11. The longitudinal ends of the frame 11 are respectively provided with symmetrical wheel grooves 115, and two pairs of parallel wheels 12 arranged at intervals are respectively supported in their corresponding wheel grooves 115 through wheel axles 13, forming a low-bed trailer 1 with an installation height lower than the height of the parallel wheels 12, which not only improves the carrying capacity of the low-bed trailer 1, but also facilitates the heavy-duty unmanned helicopter 10 to be pushed onto the low-bed trailer 1. A pair of sunken guide grooves 203 are provided on both sides of the longitudinal center line of the carriage floor 201 to avoid tripping of the protruding parts and improve the safety of the staff walking in the carriage 20. The grooved guide rails 116 with flanges on both sides are fixed in the guide rail grooves 203 by a plurality of fastening screws, and the lower edge of the wheel 13 is pressed against the bottom of the grooved guide rails 116 .

[0029] like Figure 3 to Figure 5 As shown, the heavy-duty unmanned helicopter locking device 2 is installed in a form of a pair of front ends facing the front of the vehicle and two pairs of rear ends facing the hydraulic tail plate 202, which are arranged at intervals at both ends of the lower rod 1011 on both sides of the heavy-duty unmanned helicopter landing gear 101 and on the longitudinal support rod 118 of the corresponding expandable landing gear support platform 117, including an articulated seat 21, an upper pressure block 22, a wear-resistant pad 23 and a tightening handle 24. The articulated seat 21 is vertically fixed to the Figure 5On the left top surface of the middle longitudinal support rod 118, and outside the left side of the V-shaped guide groove 1182. An arc-shaped notch 221 is provided on the lower side of the upper pressing block 22, and an arc-shaped wear-resistant pad 23 is fixed in the arc-shaped notch 221 of the upper pressing block 22. The arc shape of the wear-resistant pad 23 matches the cross-section of the lower rod 1011 of the heavy unmanned helicopter landing gear 101, thereby improving the clamping effect on the lower rod 1011. The left end of the upper pressing block 22 is hinged to the hinge seat 21 through a hinge pin 25, and the right end of the upper pressing block 22 is vertically fixedly connected to the upper left side of the tightening handle 24. Two vertical notches 1181 are provided on the other side of the longitudinal support rod 118, and the vertical notches 1181 correspond to the lower position of the tightening handle 24, and the hook seat 241 of the tightening handle 24 is fixed in the vertical notch 1181. When the heavy-duty unmanned helicopter locking device 2 is in use, the lower side of the lower rod 1011 is supported in the V-shaped guide groove 1182 of the corresponding longitudinal support rod 118, the wear-resistant pad 23 of the upper pressure block 22 presses the upper side of the corresponding position of the lower rod 1011, and the lower end of the hook 242 at the lower part of the tightening handle 24 hooks the corresponding hook seat 241, thereby fixing the heavy-duty unmanned helicopter landing gear 101 on the longitudinal support rods 118 on both sides of the frame 11.

[0030] like Figure 7 As shown, in order to adapt to the working condition that the lateral span of the heavy unmanned helicopter landing gear 101 increases after long-term use, the present invention specially sets up an expandable landing gear support platform 117. In addition to the longitudinal support rod 118, the expandable landing gear support platform 117 also includes 4 telescopic sleeve beams 1171 made of rectangular steel pipes. One end of the 4 telescopic sleeve beams 1171 arranged at intervals is vertically fixed and welded to the longitudinal support rod 118, and the other end extends into the longitudinal beams 111 on both sides of the frame 11 respectively, and the telescopic sleeve beams 1171 are locked by screws 1172. The V-shaped guide groove 1182 on the upper side of the longitudinal support rod 118 is used to support the heavy unmanned helicopter landing gear 101, and the length of the V-shaped guide groove 1182 matches the length of the lower rod 1011 of the heavy unmanned helicopter landing gear 101.

[0031] Removable handrails 14 are provided at the four corners of the frame 11, and the lower ends of the removable handrails 14 are respectively inserted into the corresponding sleeves 141 on the crossbeam 112, and the lower ends of the removable handrails 14 are locked in the corresponding sleeves 141 by elastic transverse latches 15. The removable handrails 14 can be installed and removed without the use of tools, and the elastic transverse latches 15 are very convenient to lock and unlock. The heavy-duty unmanned helicopter 10 can only enter and exit the low-bed trailer 1 after the removable handrails 14 are removed; the low-bed trailer 1 carrying the heavy-duty unmanned helicopter 10 can only be pushed in and out of the compartment 20 by pushing the removable handrails 14 after the removable handrails 14 are installed.

[0032] like Figure 2 , Figure 3 and Figure 6As shown, the locking device 3 of the low-bed trailer includes a pair of guide mechanisms 31, spring latches 32 and a tightening handle 24. The guide mechanism 31 is symmetrically arranged on the position corresponding to the middle outer side of the cross beam 112 at the front end of the frame 11 and the vehicle floor 201 in the direction of the vehicle head, and includes a guide pin 311 and a guide seat 312. One end of the guide pin 311 is symmetrically fixed on one side of the middle part of the cross beam 112 at the front end of the frame 11. The guide seat 312 corresponds to the position of the guide pin 311 and is fixed on the vehicle floor 201. When the low-bed trailer 1 is locked, the middle outer side of the cross beam 112 at the front end of the frame 11 abuts against a pair of guide seats 312, and the guide pins 311 are respectively inserted into the corresponding guide seats 312. The guide mechanism 31 not only provides precise guidance for the low-bed trailer 1 to move in the vehicle compartment 20, but also provides movement limit for the low-bed trailer 1 in three directions of the three-dimensional coordinate system. The upper part of the spring latch 32 is symmetrically fixed on the outer side of the middle part of the cross beam 12 of the frame 11 away from the front of the vehicle, i.e., at the rear end of the frame 11. The limit seat 33 corresponds to the position of the spring latch 32 and is respectively embedded and fixed at the corresponding position of the vehicle floor 201. The upper part of the tightening handle 24 is symmetrically fixed on the outer sides of both ends of the cross beam 112 at the rear end of the frame 11 and at the corresponding position of the vehicle floor 201. The ground seat 34 is symmetrically embedded and fixed on the vehicle floor 201 corresponding to the position of the tightening handle 24. When the low-bed trailer 1 is locked, the lower end of the spring latch 32 is automatically inserted into the corresponding limit seat 33. The lower end of the hook 242 at the lower part of the tightening handle 24 hooks the corresponding hook seat 241.

[0033] like Figure 1 to Figure 3 As shown, in order to prevent the heavy unmanned helicopter 10 from sliding out of the hydraulic tail plate 202, the present invention sets a second spring latch 4 between a pair of spring latches 32, the upper portion of the second spring latch 4 is fixed to the outer side of the middle portion of the cross beam 12 at the rear end of the frame 11, and the stop block 41 is fixed to the left end of the hydraulic tail plate 202 away from the vehicle compartment 20, and corresponds to the position of the lower end of the second spring latch 4. When the low-bed trailer 1 moves to the left end of the hydraulic tail plate 202, the lower end of the second spring latch 4 abuts against one side of the stop block 41.

[0034] A method for using a heavy-duty unmanned helicopter fixing device in a vehicle compartment comprises the following steps:

[0035] 1) The heavy unmanned helicopter 10 enters the carriage 20. First, the hydraulic tail plate 202 outside the double doors at the rear end of the carriage 20 is rotated from a vertical state to a horizontal state, and then the double doors at the rear end of the carriage 20 are opened. Then, the pair of grooved guide rails 116 of the hydraulic tail plate 202 are adjusted to a position flush with the bottom of the pair of grooved guide rails 116 on the carriage floor 201. Then, the spring latches 32 symmetrically arranged in the middle of the cross beam 112 at the rear end of the frame 11 are pulled up respectively, so that the lower ends of the spring latches 32 are separated from the corresponding limit seats 33. At the same time, the tensioning handles 24 at both ends of the cross beam 112 at the rear end of the frame 11 are loosened respectively, so that the lower ends of the hooks 242 at the lower part of the tensioning handles 24 are separated from the hook seats 241 in the corresponding ground seats 34, thereby releasing the fixed connection between the frame 11 and the carriage floor 201. Then, by pushing each detachable handrail 14, the four pairs of wheels 12 on both sides of the low-bed trailer 1 are rolled along the grooved guide rails 116 into a pair of grooved guide rails 116 of the hydraulic tailgate 202, and then the elastic transverse latch 15 is pulled to remove the detachable handrail 14.

[0036] 2) The heavy-duty unmanned helicopter 10 is fixed on the low-bed trailer 1, the hydraulic tail plate 202 is lowered to the ground, and the top rotor of the heavy-duty unmanned helicopter 10 that has been parked on the ground is removed. Then, the wheels 102 at the front of the heavy-duty unmanned helicopter landing gear 101 are pulled down with the force rods to support them on the ground, so that the heavy-duty unmanned helicopter 10 can be pushed to the low-bed trailer 1, and the lower rods 1011 on both sides of the heavy-duty unmanned helicopter landing gear 101 are pushed into the V-shaped guide grooves 1181 of the longitudinal support rods 118 on both sides of the frame 11. Then, the upper pressing blocks 22 are turned over to press the lower rods 1011, and the tensioning handle 24 is pulled forward, so that the lower ends of the hooks 242 at the lower part of the tensioning handle 24 are hooked on the corresponding hook seats 241 to lock the upper pressing blocks 22, thereby fixing the heavy-duty unmanned helicopter landing gear 101 on the longitudinal support rods 118 on both sides of the frame 11. Then, the lower ends of the detachable handrails 14 are respectively inserted into the corresponding sleeves 141 on the cross beam 112 , and the lower ends of the detachable handrails 14 are locked in the corresponding sleeves 141 by means of the elastic cross latch 15 .

[0037] 3) After the low-bed trailer 1 moves into the compartment 20, it is fixed on the compartment floor 201, and the detachable handrails 14 are pushed, so that the low-bed trailer 1 and the heavy unmanned helicopter 10 loaded thereon are moved into the compartment 20 from the hydraulic tail plate 202 under the support and guidance of the wheels 12 installed on both sides of the frame 11, until the outer side of the middle part of the crossbeam 112 at the front end of the frame 11 abuts against a pair of guide seats 311, and the guide pins 312 are respectively inserted into the corresponding guide seats 311. At the same time, the lower end of the spring pin 32 on the middle part of the crossbeam 112 at the rear end of the frame 11 automatically extends into the corresponding limit seat 33 on the compartment floor 201 under the elastic force of the compression spring 321. Then, the tensioning handles 24 at both ends of the crossbeam 112 at the rear end of the frame 11 are pulled forward respectively, so that the lower end of the hook 242 at the lower part of the tensioning handle 24 hooks the hook seat 241 in the corresponding ground seat 34, so that the low-bed trailer 1 is fixed on the car floor 201; finally, the double doors at the rear end of the car 20 are closed, and the hydraulic tail plate 202 is folded to a vertical state, and the van transport vehicle loaded with the heavy unmanned helicopter 10 can be started for transfer transportation.

[0038] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A heavy unmanned helicopter fixing device in a vehicle compartment, characterized in that: It comprises a low-bed trailer, a locking device for a heavy-duty unmanned helicopter and a locking device for a low-bed trailer. The frame of the low-bed trailer is a rectangular steel structure welded by rectangular steel pipes, including longitudinal beams on both longitudinal sides of the frame and cross beams on both transverse ends of the frame, as well as a number of longitudinal bars and cross bars arranged at intervals and fixedly welded in the frame. Symmetrical wheel grooves are respectively arranged at both longitudinal ends of the frame, and two pairs of parallel wheels arranged at intervals are respectively supported in their corresponding wheel grooves through wheel axles, forming a low-bed trailer with an installation height lower than the height of the parallel wheels; a pair of sunken guide rail grooves are arranged on both sides of the longitudinal center line of the carriage floor, and groove-shaped guide rails with flanges on both sides are respectively fixed in the guide rail grooves, and the lower edges of the wheels are against the bottom of the groove-shaped guide rails; the unmanned helicopter locking device is respectively arranged on the expandable landing gear support platforms on both longitudinal sides of the low-bed trailer, and the low-bed trailer locking device is respectively arranged at the front and rear ends of the low-bed trailer and at the corresponding positions of the carriage floor; The vehicle frame is provided with expandable landing gear support platforms on both sides of the longitudinal direction, and the expandable landing gear support platforms include a longitudinal support rod and a plurality of telescopic sleeve beams, one end of the plurality of telescopic sleeve beams arranged at intervals is vertically fixedly welded to the longitudinal support rod, and the other ends of the plurality of telescopic sleeve beams are respectively extended into the longitudinal beams on both sides of the vehicle frame, and the telescopic sleeve beams are locked by screws; a V-shaped guide groove for supporting the landing gear of a heavy unmanned helicopter is provided on the upper side of the longitudinal support rod, and the length of the V-shaped guide groove matches the length of the lower rod of the landing gear of the heavy unmanned helicopter; The heavy-duty unmanned helicopter locking device is respectively arranged at intervals at the two ends of the lower rods on both sides of the heavy-duty unmanned helicopter landing gear and on the longitudinal support rods of the corresponding expandable landing gear support platform, including an articulated seat, an upper pressure block, a wear-resistant pad and a tightening handle. The articulated seat is vertically fixed on the top surface of one side of the longitudinal support rod and is located outside one side of the V-shaped guide groove; an arc-shaped recess is provided on the lower side of the upper pressure block, and the arc-shaped wear-resistant pad is fixed in the arc-shaped recess of the upper pressure block, and the arc shape of the wear-resistant pad matches the cross-section of the lower rod of the heavy-duty unmanned helicopter landing gear; one end of the upper pressure block is hinged with the articulated seat through a hinge pin Then, the other end of the upper pressing block is vertically fixedly connected to one side of the upper part of the tightening handle, and a plurality of vertical notches are provided on the other side of the longitudinal support rod, and the vertical notches correspond to the lower position of the tightening handle, and the hook seat of the tightening handle is fixed in the vertical notch; when the heavy-duty unmanned helicopter locking device is used, the lower side of the lower rod is respectively supported in the V-shaped guide groove of the corresponding longitudinal support rod, and the wear-resistant pads of the upper pressing block respectively press the upper side of the corresponding position of the lower rod, and the lower ends of the hooks at the lower part of the tightening handle are respectively hooked on the corresponding hook seats, thereby fixing the landing gear of the heavy-duty unmanned helicopter to the longitudinal support rods on both sides of the frame; The locking device of the low-bed trailer includes a pair of guide mechanisms, spring latches and a tightening handle. The guide mechanism is symmetrically arranged on the frame facing the front of the vehicle, that is, at a position corresponding to the middle outer side of the cross beam at the front end of the frame and the floor of the vehicle compartment. It includes a guide pin and a guide seat. One end of the guide pin is symmetrically fixed on one side of the middle part of the cross beam at the front end of the frame. The guide seat corresponds to the position of the guide pin and is fixed on the floor of the vehicle compartment respectively. When the low-bed trailer is locked, the middle outer side of the cross beam at the front end of the frame abuts against a pair of guide seats, and the guide pins are respectively inserted into the corresponding guide seats. The upper part of the spring latch is symmetrically fixed on the outer side of the middle part of the crossbeam of the frame away from the front of the vehicle, that is, on the rear end of the frame. The limit seat corresponds to the position of the spring latch and is respectively embedded and fixed on the corresponding position of the car floor; the upper part of the tightening handle is symmetrically fixed on the outer sides of both ends of the crossbeam at the rear end of the frame and the corresponding position of the car floor, and the ground seat is symmetrically embedded and fixed on the car floor corresponding to the position of the tightening handle; when the low-bed trailer is locked, the lower end of the spring latch is automatically inserted into the corresponding limit seat; the lower end of the hook at the lower part of the tightening handle is hooked on the hook seat in the corresponding ground seat.

2. The heavy unmanned helicopter fixing device in a vehicle compartment according to claim 1 is characterized in that: The four corners of the frame are respectively provided with detachable handrails, the lower ends of the detachable handrails are respectively inserted into corresponding sleeves on the crossbeam, and the lower ends of the detachable handrails are locked in the corresponding sleeves through elastic cross pins.

3. The heavy unmanned helicopter fixing device in a vehicle compartment according to claim 1, characterized in that: A second spring latch is also provided to prevent the low-bed trailer from sliding out of the hydraulic tailboard. The second spring latch is located between a pair of spring latches. The upper part of the second spring latch is fixed to the outer side of the middle part of the crossbeam at the rear end of the frame. The limit block is fixed to the outer end of the hydraulic tailboard away from the car body and corresponds to the position of the lower end of the second spring latch. When the low-bed trailer moves to the outer end of the hydraulic tailboard, the lower end of the second spring latch abuts against one side of the limit block.

4. A method for using the heavy unmanned helicopter fixing device in a vehicle compartment as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: 1) A heavy-duty unmanned helicopter enters the carriage. First, the hydraulic tail plate outside the double doors at the rear end of the carriage is rotated from a vertical state to a horizontal state, and then the double doors at the rear end of the carriage are opened. Then, a pair of grooved guide rails of the hydraulic tail plate are adjusted to a position flush with the bottom of a pair of grooved guide rails on the carriage floor; then, the spring latches symmetrically arranged in the middle of the crossbeam at the rear end of the frame are pulled up respectively, so that the lower ends of the spring latches are separated from the corresponding limit seats; at the same time, the tightening handles at both ends of the crossbeam at the rear end of the frame are loosened respectively, so that the lower ends of the hooks at the lower parts of the tightening handles are separated from the hook seats in the corresponding ground seats, thereby releasing the fixed connection between the frame and the carriage floor; then, by pushing each detachable handrail, several pairs of wheels on both sides of the low-bed trailer are rolled along the grooved guide rails into the pair of grooved guide rails of the hydraulic tail plate; then, the elastic horizontal latch is pulled to remove the detachable handrail; 2) The heavy-duty unmanned helicopter is fixed on the low-bed trailer, the hydraulic tail plate is lowered to the ground, and the top rotor of the heavy-duty unmanned helicopter that has been parked on the ground is removed; then the wheels at the front of the landing gear of the heavy-duty unmanned helicopter are pulled down with the force rods to support them on the ground, so that the heavy-duty unmanned helicopter can be pushed to the low-duty trailer, and the lower rods on both sides of the landing gear of the heavy-duty unmanned helicopter are pushed into the V-shaped guide grooves of the longitudinal support rods on both sides of the frame; then the upper pressing blocks are flipped over to press the lower rods, and the tightening handle is pulled forward so that the lower ends of the hooks at the lower part of the tightening handle are respectively hooked with the corresponding hook seats to lock the upper pressing blocks, thereby fixing the landing gear of the heavy-duty unmanned helicopter on the longitudinal support rods on both sides of the frame; then the lower ends of the detachable handrails are respectively inserted into the corresponding sleeves on the crossbeams, and the lower ends of the detachable handrails are locked in the corresponding sleeves by elastic cross pins; 3) After the low-bed trailer is moved into the carriage, it is fixed on the carriage floor, and the detachable handrails are pushed so that the low-bed trailer and the heavy-duty unmanned helicopter loaded thereon are moved into the carriage from the hydraulic tail plate under the support and guidance of the wheels mounted on both sides of the frame, until the outer side of the middle part of the crossbeam at the front end of the frame abuts against a pair of guide seats, at which time the guide pins are respectively inserted into the corresponding guide seats; at the same time, the lower end of the spring pin on the middle part of the crossbeam at the rear end of the frame automatically extends into the corresponding limit seat on the carriage floor under the action of the elastic force of the compression spring; then the tightening handles at both ends of the crossbeam at the rear end of the frame are pulled forward respectively, so that the lower end of the hook at the lower part of the tightening handle hooks the hook seat in the corresponding ground seat, thereby fixing the low-bed trailer on the carriage floor; finally, the double-opening door at the rear end of the carriage is closed, and the hydraulic tail plate is retracted to a vertical state, and the van transport vehicle loaded with the heavy-duty unmanned helicopter can be started for transfer transportation.

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