Device for connecting and fixing carrier system to aircraft and method for installing and operating the same

Abstract

The present invention provides a device for connecting and fixing a transport system to an aircraft, and a method for installing and operating the device. The device includes: a foldable support structure, which is mounted on the transport system and includes a foldable system and an anti-accidental folding system; a base, which is mounted on the aircraft's fuselage frame and to which the transport system, with the support structure mounted, is fixed. The base includes a guide groove and coaxial first and second mounting holes at its center, with the first mounting hole being open and having a larger diameter than the second mounting hole. Because the base of the present invention has a guide groove and two layers of mounting holes, and the support structure includes both a foldable system and an anti-accidental folding system, the device for connecting and fixing a transport system to an aircraft, and the method for installing and operating the device, are simple to modify and install for both the aircraft and the transport system, have high reliability, strong adaptability, and are extremely easy to install and operate. Furthermore, the base has excellent results for applications such as transporting patients.

Description

Technical Field

[0001] The present invention relates to the field of connection support device design, and in particular to a connection and fixing device for a carrier system and an aircraft and an installation operation method thereof, for achieving a stable connection between the carrier system and the aircraft. Background Art

[0002] Aeromedical rescue is a rapid medical rescue method used both domestically and internationally. It can promptly and quickly transport the injured and sick to designated treatment locations in the rear, buying them precious time for treatment and ultimately saving lives.

[0003] With the development of civil aircraft, civil aircraft need to meet the needs of transporting patients. The portable embarkation and disembarkation devices responsible for transporting patients need to be quickly connected and fixed to the fuselage of the civil aircraft, and need to be fast and reliable.

[0004] In response to the above requirements, there are currently two solutions in the field of technology to enable patients or supplies to board and disembark:

[0005] Solution 1: Use a dedicated boarding and disembarking device:

[0006] (1) Existing document US5535964A provides a manual transport system, which includes a stretcher placement platform and a vertical lift. One end of the stretcher placement platform is connected to the stretcher placement device inside the fuselage, and the other end of the stretcher placement platform is connected to the vertical lift. The vertical lift is placed on the ground, and the height of the stretcher placement platform is manually adjusted by staff. This manual transport system is generally suitable for small aircraft with a low altitude above the ground.

[0007] (2) Existing document US6854147B1 provides an electric carrying system, which includes a sliding stretcher support platform, a track, and a drive device. The sliding stretcher support platform includes a stretcher support platform, a sliding device, and a support structure. When in operation, the drive device drives the sliding stretcher support platform to move along the track. This electric carrying system is generally suitable for aircraft with a height of less than 2 meters above the ground.

[0008] (3) Existing document US5076515A provides an aircraft stretcher loading device, which includes a base and a cantilevered horizontal platform. The base is connected to the aircraft floor via a joint. When folded, the aircraft stretcher loading device can be stored in the cabin as a whole. When in operation, a driving device in the base drives the cantilevered horizontal platform to move up and down along the base.

[0009] Option 2: Use vertical lifting device:

[0010] This type of vertical lift consists of a trailer, a scissor lift mechanism, and a load platform. During operation, the trailer drives a hydraulic actuator that drives the scissor lift mechanism, which in turn moves the load platform up and down. This type of vertical lift is generally suitable for high-altitude aircraft platforms.

[0011] However, the above existing technical solutions have at least the following significant technical defects:

[0012] First, regarding the solution 1 using a dedicated boarding and disembarking device:

[0013] (1) According to the technical solution of the existing document US5535964A, when the boarding gate is high, the stretcher placement platform will be constrained by the boarding gate and the height from the ground will exceed the range of manual lifting.

[0014] (2) According to the technical solution of the existing document US6854147B1, the track is a one-piece track and therefore its length cannot be adjusted. In addition, the driving device is a telescopic motion and its effective length is also limited. Although the system is detachable, the track and stretcher support platform are long, thus occupying the already limited space in the aircraft. Therefore, the system is extremely inconvenient to carry and store.

[0015] (3) According to the technical solution of the existing document US5076515A, since the device is fixedly connected to the aircraft boarding gate, it is suitable for aircraft with low boarding gate heights. However, when the aircraft is at a higher altitude, the device is larger in size after being retracted, making it inconvenient to store and occupying the boarding gate passage.

[0016] Secondly, regarding the second option of using a vertical lifting device:

[0017] Since this type of vertical lifting device is large in size and heavy in weight, it is not convenient to carry around and store it.

[0018] In light of the foregoing, it is clear that a design solution for connecting and securing a delivery system to an aircraft currently lacks in the art. This solution addresses the issue of how to connect and secure a delivery system to an aircraft, simplifies modification and installation of both the aircraft and the delivery system, offers high reliability, and possesses strong adaptability, is extremely easy to install, and is highly effective for applications such as patient transport. Therefore, designing a delivery system-to-aircraft connection and securing device that meets these requirements has become a pressing technical challenge. Summary of the Invention

[0019] The present invention is made to solve the above-mentioned technical problems. Its main purpose is to provide a connection and fixing device between a transport system and an aircraft. It is not only simple for modification and installation of the aircraft and the transport system, but also has high reliability, strong adaptability, and is extremely easy to operate and use. At the same time, it has a very good effect on the application of transport systems such as transporting patients.

[0020] Another object of the present invention is to provide a method for connecting the carrier system to the aircraft and installing a fixing device.

[0021] In order to achieve the above-mentioned object of the invention, according to one aspect of the present invention, a device for connecting and fixing a carrier system to an aircraft is provided, comprising:

[0022] A support structure, the support structure being mounted on the carrier system, the support structure being foldable and comprising a folding system and an anti-accidental folding system,

[0023] A base is mounted on the fuselage frame of the aircraft, and the carrier system with the support structure mounted thereon is fixed to the base. The base is provided with a guide groove, a first-layer mounting hole, and a second-layer mounting hole at its center, wherein the first-layer mounting hole and the second-layer mounting hole are coaxial, and the first-layer mounting hole is open and has a size larger than the diameter of the second-layer mounting hole.

[0024] Preferably, the device for connecting and fixing the carrier system to the aircraft according to the present invention further includes: a carrier structure, which is installed on the carrier system, and the carrier structure includes a base, a strut and a joint, which is used to increase the stiffness of the carrier system at the support structure to transfer the load.

[0025] Preferably, according to the connection and fixing device of the carrying system and the aircraft of the present invention, wherein the supporting structure includes an ear, a handle, a spring, a stopper, a telescopic rod, a support rod and a support, the foldable system uses the principle of different axes to prevent folding, which is composed of the ear, the handle, the spring, the stopper and the telescopic rod, and the anti-accidental folding system uses the pull rod principle to prevent folding, which is composed of the ear, the handle, the spring, the stopper and the telescopic rod.

[0026] Preferably, according to the connection and fixing device of the carrier system and the aircraft of the present invention, the two ends of the support rod are respectively provided with lock buckles, and the lock buckles are fixed to the locking rings provided on the support to connect the support rod between the carrier system and the base.

[0027] Preferably, according to the connection and fixing device of the carrying system and the aircraft of the present invention, the foldable system of the supporting structure is opened around the first rotation axis of the supporting structure, and is locked in the locking ring on the base by using the locking buckles located at both ends of the support rod to fix the foldable system.

[0028] Preferably, according to the connection and fixing device of the carrying system and the aircraft of the present invention, a "∩"-shaped groove is opened at one end of the ear piece, and the handle is installed in the "∩"-shaped groove. The two ends of the "∩"-shaped groove are respectively a first position and a second position, and the handle can move between the first position and the second position.

[0029] Preferably, according to the connection and fixing device of the carrying system and the aircraft of the present invention, one end of the handle is connected to the telescopic rod, and when the handle moves from the second position to the first position, it can drive the telescopic rod to extend, and when the handle moves from the first position to the second position, it can drive the telescopic rod to retract.

[0030] Preferably, according to the connection and fixing device of the carrying system and the aircraft of the present invention, one end of the telescopic rod is connected to the handle, and the other end thereof is connected to the stop block, so that the stop block is driven to move during the extension of the telescopic rod, so that the second rotation axis of the telescopic rod and the first rotation axis of the supporting structure no longer coincide with each other, so that when the ear rotates along the first rotation axis, the stop block can be blocked, thereby preventing the ear from rotating.

[0031] Preferably, according to the device for connecting and fixing a carrier system to an aircraft of the present invention, the spring is wound around the telescopic rod and is always in a stretched state, so that the telescopic rod is always in a tendency to extend.

[0032] Preferably, according to the device for connecting and fixing a carrier system to an aircraft of the present invention, the base is square, and fastener fixing holes for fixing fasteners are provided on the four corners thereof.

[0033] Preferably, in the device for connecting and fixing a carrying system to an aircraft according to the present invention, the fasteners are bolts.

[0034] Preferably, according to the device for connecting and fixing a carrier system to an aircraft of the present invention, when the carrier system is installed on the aircraft, the circular axis of the ear end of the support structure is introduced into the first-layer mounting hole of the base via the guide groove, and then the handle is pulled to move it from the second position to the first position, and the telescopic rod is driven and inserted into the second-layer mounting hole of the base, thereby fixing the carrier system to the base.

[0035] According to another aspect of the present invention, a method for connecting a carrier system to an aircraft and installing a fixing device of the present invention is provided, comprising the following steps:

[0036] Step 1: Rotate the support structures on both sides outward around the first rotation axis to a specified position;

[0037] Step 2: Secure the lock buckles at both ends of the support rods of the support structure to the locking rings of the support, thereby securing the support structure to prevent accidental folding;

[0038] Step 3: Slowly place the round shafts of the lug ends on both sides of the support structure into the first-layer mounting holes of the base along the guide grooves of the base, so that the carrier system is stably placed on the fuselage and the ground;

[0039] Step 4: Move the handle from the second position to the first position, driving the telescopic rod to be inserted into the second-layer mounting hole of the base, thereby fixing the carrier system to the fuselage.

[0040] In view of the above, the core technology of the present invention is:

[0041] - Folding design facilitates installation of the carrier into the hatch without increasing its width;

[0042] - Double connection and fixation, that is, the connection and fixation device of the present invention is connected and fixed to the fuselage through two coaxial holes but different diameters. This not only simplifies the connection but also has extremely high safety and reliability;

[0043] - A dual-folding prevention design for the support structure: the first layer utilizes the principle of non-coaxiality to prevent folding, while the second layer utilizes the principle of pull rods to prevent folding. This effectively prevents accidental folding and greatly improves safety and reliability;

[0044] A novel installation method involves first unfolding the folding support structure, entering the first-layer mounting holes through the guide slots, and then operating the telescopic rod with the handle to access the second-layer mounting holes. This method allows for quick and easy installation without the use of any tools, making the process both simple and safe.

[0045] The unique structure features a base with guide grooves and two layers of mounting holes, and a support structure with two systems: a foldable system and an anti-accidental folding system. This structure is not only simple but also safe to use.

[0046] Due to the above technical solution, compared with the existing technology, the present invention can bring the following technical effects:

[0047] 1. Small modifications: No need to dismantle or replace aircraft parts; installation can be completed by simply installing the base on the door frame.

[0048] 2. Simple installation: As long as there is enough space in the carrier system, the connecting and fixing device of the present invention can be installed on the carrier system by simple bolt connection;

[0049] 3. Strong applicability: The connection and fixing device of the present invention is applicable to various aircraft above the mainline level;

[0050] 4. High reliability: The connection and fixing device of the present invention has dual protection functions during installation and use, thereby effectively avoiding misoperation during installation or unexpected situations during use;

[0051] 5. Easy to use: During use, the connection and fixing device of the present invention can quickly complete the installation and unloading operations without using any tools, whether installing or unloading the carrier system.

[0052] Based on the common sense in this field, the above preferred implementation modes can be arbitrarily combined to obtain preferred embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] To better understand the above and other objects, features, advantages, and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to illustrate preferred embodiments of the present invention by way of illustration and are not intended to limit the scope of the present invention. The components in the drawings are not drawn to scale.

[0054] - Figure 1A 1B schematically shows a perspective view of the overall structure of a preferred embodiment of the connection and fixing device of the carrier system and the aircraft of the present invention;

[0055] - Figure 2A 2C schematically shows a perspective view of the structure of the support structure in the connection and fixing device of the carrier system and the aircraft of the present invention;

[0056] - Figure 3The figure schematically shows the connection between the carrier system and the aircraft and the structural perspective view of the base in the fixing device of the present invention;

[0057] - Figure 4A -4D schematically shows the connection between the carrier system of the present invention and the aircraft and the installation operation diagram of the fixing device.

[0058] List of reference numerals in the figures in the technical solutions and embodiments:

[0059] 1 Support structure

[0060] 1.1 Ear piece

[0061] 1.11 Slots

[0062] 1.12 Round shaft

[0063] 1.2 Handle

[0064] 1.3 Spring

[0065] 1.4 Stopper

[0066] 1.5 Telescopic rod

[0067] 1.6 Support rod

[0068] 1.61 Lock

[0069] 1.7 Support

[0070] 1.71 Locking Ring

[0071] R1 First rotation axis

[0072] R2 Second axis of rotation

[0073] A First Position

[0074] B Second position

[0075] 2 base

[0076] 2.1 Guide groove

[0077] 2.2 First layer mounting holes

[0078] 2.3 Second layer mounting holes

[0079] 2.4 Fastener fixing holes

[0080] 3 Carrying structure

[0081] 3.1 Base

[0082] 3.2 Support pole

[0083] 3.3 Connectors

[0084] 4 borders

[0085] 5 Delivery System DETAILED DESCRIPTION

[0086] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention.

[0087] In this regard, it should be pointed out that, in the specific description of these embodiments, in order to provide a concise description, this specification cannot provide a detailed description of all the features of the actual embodiments. It should be understood that in the actual implementation of any embodiment, just as in the process of any engineering project or design project, in order to achieve the specific goals of the developer and to meet system-related or business-related restrictions, various specific decisions are often made, and this will also change from one embodiment to another. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed by the present invention, some changes in design, manufacturing or production based on the technical contents disclosed in this disclosure are just conventional technical means and should not be understood as the contents of this disclosure being insufficient.

[0088] In addition, it should be noted that, unless otherwise defined, the technical or scientific terms used in the claims and the specification should have the usual meaning understood by persons with ordinary skills in the technical field to which the invention belongs. "A" or "an" and other similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. "Include" or "comprises" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and other similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0089] 1-3 , a preferred embodiment of the connection and fixing device between the carrier system and the aircraft of the present invention will be described in detail to make the advantages and features of the present invention easily understood by those skilled in the art, thereby making a clearer definition of the scope of the present invention.

[0090] In general, Figure 1AFigure 1B schematically illustrates a perspective view of the overall structure of a preferred embodiment of the present invention's carrier system and aircraft connection and fixation device. As shown, the carrier system and aircraft connection and fixation device primarily comprises a support structure 1, a base 2, and an optional transfer structure 3. The present invention utilizes the aircraft's side frames 4 to mount two additional bases 2, and then mounts and secures the carrier system 5, equipped with the support structure 1 and transfer structure 3, to the bases 2 to enable operation. It's worth noting that if the carrier system 5 already has a transfer structure, the transfer structure 3 can be omitted.

[0091] The following describes in detail the structure of the connection and fixing device between the carrier system and the aircraft and the functions of the main components of the carrier system of the present invention.

[0092] Support structure 1

[0093] Figure 2A -2C schematically shows a structural stereoscopic diagram of the support structure in the connection and fixing device of the carrier system of the present invention and the aircraft.

[0094] As shown in the figure, the support structure 1 of the present invention's connecting and securing device for the carrier system to the aircraft primarily comprises a tab 1.1, a handle 1.2, a spring 1.3, a stopper 1.4, a telescopic rod 1.5, a brace 1.6, and a support 1.7. The support structure 1 of the present invention is foldable, facilitating installation of the carrier system 5 within a cabin door without increasing its width. This foldable design facilitates installation of the carrier system within a cabin door without increasing its width.

[0095] like Figure 2A As shown in FIG. 2C , the support structure 1 of the present invention includes two systems, one of which is a foldable system consisting of an ear piece 1.1, a handle 1.2, a spring 1.3, a stopper 1.4 and a telescopic rod 1.5; the other is an anti-accidental folding system consisting of a stopper 1.4, a telescopic rod 1.5, a support rod 1.6 and a support 1.7.

[0096] The bracing rod 1.6 is provided with locking buckles 1.61 at each end, which are locked with locking rings 1.71 provided on the support 1.7, thereby connecting the bracing rod 1.6 between the carrier system 5 and the base 2. When the connection and securing device of the carrier system to the aircraft of the present invention is in operation, the foldable system of the support structure 1 is unfolded about the first rotation axis R1 of the support structure 1 and locked by the locking buckles 1.61 at each end of the bracing rod 1.6 into the locking rings on the base 1.7, thereby securing the foldable system.

[0097] like Figure 2CAs shown, one end of the ear piece 1.1 defines a ∩-shaped slot 1.11, within which the handle 1.2 is mounted. The two ends of the ∩-shaped slot 1.11 are respectively positioned in a first position A and a second position B, between which the handle 1.2 is movable. One end of the handle 1.2 is connected to the telescopic rod 1.5. When the handle 1.2 moves from the second position B to the first position A, the telescopic rod 1.5 is extended. Conversely, when the handle 1.2 moves from the first position A to the second position B, the telescopic rod 1.5 is retracted.

[0098] like Figure 2B As shown, one end of the telescopic rod 1.5 is connected to the handle 1.2, while the other end is connected to the stopper 1.4. As the telescopic rod 1.5 extends, it drives the stopper 1.4 to move, causing the second rotation axis R2 of the telescopic rod 1.5 to no longer coincide with the first rotation axis R1 of the support structure 1. Consequently, when the tab 1.1 rotates along the first rotation axis R1, the stopper 1.4 is blocked by other components, preventing the tab 1.1 from rotating. This effectively prevents the support structure 1 from accidentally folding.

[0099] Still the same Figure 2B As shown, the spring 1.3 is wound around the telescopic rod 1.5 and is constantly stretched, causing the telescopic rod 1.5 to constantly extend. Therefore, during disassembly, a greater force is required to move the handle 1.2 from the second position B to the first position A, thereby retracting the telescopic rod 1.5. This ensures that even if the handle 1.2 is accidentally moved, the extension of the telescopic rod 1.5 will not be affected. The tab 1.1 can only be folded when the telescopic rod 1.5 returns to the second position B and the first rotation axis R1 of the support structure 1 and the second rotation axis R2 of the telescopic rod 1.5 are aligned again.

[0100] In summary, the present invention has a dual design to prevent the support structure from folding, wherein the first level uses the principle of different axes to prevent folding, and the second level uses the principle of pull rods to prevent folding, which can effectively prevent accidental folding and greatly improve safety and reliability.

[0101] Base 2

[0102] Figure 3 The base 2 in the device for connecting and fixing the carrier system to the aircraft is the only component that needs to be fixed to the fuselage frame 4 by fasteners.

[0103] As shown in the figure, according to a preferred embodiment, the base 2 is provided with a guide groove 2.1, a first-layer mounting hole 2.2 and a second-layer mounting hole 2.3 at its center, wherein the first-layer mounting hole 2.2 and the second-layer mounting hole 2.3 are coaxial but have different diameters. Figure 3 As shown, the first layer mounting hole 2.2 is open and its size is significantly larger than the diameter of the second layer mounting hole 2.3. Preferably, the base 2 is square and has fastener fixing holes 2.4 for fixing fasteners such as bolts on each of its four corners.

[0104] To install the carrier system 5 on an aircraft, the circular shaft 1.12 at the end of the lug 1.1 of the support structure 1 is first guided through the guide groove 2.1 into the first-layer mounting hole 2.2 of the base 2. The handle 1.2 is then moved from the second position B to the first position A, thereby driving the telescopic rod 1.5 to be inserted into the second-layer mounting hole 2.3 of the base 2, thereby firmly securing the carrier system 5 to the base 2.

[0105] Thus, the carrier system of the present invention is connected and fixed to the aircraft via two coaxial holes of different diameters. This not only simplifies the connection but also provides extremely high safety and reliability. Furthermore, because the mounting height of the base determines the mounting angle of the carrier system, the mounting angle can be arbitrarily selected based on the height range of the aircraft cabin floor and the operating requirements of the carrier system. This makes the carrier system of the present invention applicable to a variety of mainline aircraft and above, and is highly adaptable.

[0106] Carrying structure 3

[0107] like Figure 1B As shown, the load-transfer structure 3 in the device for connecting and securing the carrier system to the aircraft of the present invention primarily comprises a base 3.1, struts 3.2, and joints 3.3. This load-transfer structure 3 serves to increase the rigidity of the support structure 1 where the carrier system 5 is mounted, thereby enabling load transfer. It is worth noting that if the carrier system 5 already has a structure for load transfer, that is, a designed load transfer path, the load of the carrier system 5 can be transferred to the aircraft, and the load-transfer structure 3 can be omitted.

[0108] In summary, in the connection and fixing device between the carrier system and the aircraft of the present invention, since the base has a guide groove and two layers of mounting holes, and the supporting structure has two systems, namely a foldable system and an anti-accidental folding system, this structural form of the present invention is not only simple but also safe to use.

[0109] Next, combined with Figure 4A -4D will introduce the connection between the carrier system and the aircraft and the installation and operation method of the fixing device when in use. Figure 4A -4D schematically shows the connection between the carrier system of the present invention and the aircraft and the installation operation diagram of the fixing device.

[0110] Specifically, when in use, the method for connecting the carrier system to the aircraft and installing the fixing device of the present invention includes the following steps:

[0111] Step 1: Rotate the support structures 1 on both sides outward around the first rotation axis R1 to a specified position;

[0112] Step 2: Secure the lock buckles 1.61 at both ends of the support rod 1.6 of the support structure 1 to the lock ring 1.71 of the support 1.7, thereby securing the support structure 1 to prevent accidental folding;

[0113] Step 3: Slowly place the round shafts 1.12 at the ends of the lugs 1.1 on both sides of the support structure 1 along the guide grooves 2.1 of the base 2 into the first-layer mounting holes 2.2 of the base 2, so that the carrier system 5 is stably placed on the fuselage and the ground;

[0114] Step 4: Move the handle 1.2 from the second position B to the first position A, driving the telescopic rod 1.5 to be inserted into the second-layer mounting hole 2.3 of the base 2, thereby fixing the carrying system 5 to the fuselage.

[0115] According to the method for installing and operating the connection and fixing device of the carrier system to the aircraft of the present invention, the folding support structure is first opened, and the first layer of mounting holes is entered through the guide groove. Then, the telescopic rod is operated by the handle to enter the second layer of mounting holes. Therefore, during use of the present invention, whether installing or unloading the carrier system, the installation and unloading operations can be completed quickly without using any tools, and the process is both simple and safe.

[0116] In view of the above technical solution, compared with the existing technology, the connection and fixing device between the transport system and the aircraft of the present invention is very simple for the modification and installation of the aircraft and the transport system, has high reliability, and has strong adaptability. The installation operation is extremely simple, and at the same time it has a very good effect on the application of the transport system for transporting patients.

[0117] While preferred embodiments of the present invention have been described in detail above, it should be understood that additional advantages and modifications will readily occur to those skilled in the art after reviewing the foregoing teachings of the present invention. Therefore, in its broader aspects, the present invention is not limited to the specific details and representative embodiments shown and described herein. Therefore, those skilled in the art will be able to reasonably combine or modify the elements of the foregoing embodiments to make various modifications without departing from the spirit or scope of the general inventive concept of the present invention as defined by the appended claims and their equivalents.

Claims

1. A device for connecting and fixing a carrier system to an aircraft, comprising: A support structure, the support structure being mounted on the carrier system, the support structure being foldable and comprising a folding system and an anti-accidental folding system, a base, the base being mounted on a fuselage frame of the aircraft, the carrier system with the support structure mounted thereon being fixed to the base, the base being provided at its center with a guide groove, a first-layer mounting hole, and a second-layer mounting hole, wherein the first-layer mounting hole and the second-layer mounting hole are coaxial, and the first-layer mounting hole is open and has a size larger than a diameter of the second-layer mounting hole; A load-transmitting structure is installed on the carrier system. The load-transmitting structure includes a base, a support rod and a joint, and is used to increase the rigidity of the carrier system at the location where the support structure is installed to transmit the load.

2. The device for connecting and fixing a carrier system to an aircraft according to claim 1, wherein: The support structure includes an ear piece, a handle, a spring, a stopper, a telescopic rod, a support rod and a support. The foldable system utilizes the principle of different axes to prevent folding, and is composed of the ear piece, the handle, the spring, the stopper, and the telescopic rod. The anti-accidental folding system utilizes the pull rod principle to prevent folding, and is composed of the ear piece, the handle, the spring, the stopper, and the telescopic rod.

3. The device for connecting and fixing a carrier system to an aircraft according to claim 2, wherein: Lock buckles are respectively provided at both ends of the support rod, and the lock buckles are fixed with locking rings arranged on the support so that the support rod is connected between the carrying system and the base.

4. The device for connecting and fixing a carrier system to an aircraft according to claim 3, wherein: The foldable system of the support structure is opened around the first rotation axis of the support structure and is locked in the locking ring on the base by using the locking buckles located at both ends of the support rod to fix the foldable system.

5. The device for connecting and fixing a carrier system to an aircraft according to claim 2, wherein: A "∩"-shaped slot is provided at one end of the ear piece, and the handle is installed in the "∩"-shaped slot. The two ends of the "∩"-shaped slot are respectively a first position and a second position, and the handle can move between the first position and the second position.

6. The device for connecting and fixing a carrier system to an aircraft according to claim 5, characterized in that: One end of the handle is connected to the telescopic rod. When the handle moves from the second position to the first position, it can drive the telescopic rod to extend, and when the handle moves from the first position to the second position, it can drive the telescopic rod to retract.

7. The device for connecting and fixing a carrier system to an aircraft according to claim 2, wherein: One end of the telescopic rod is connected to the handle, and the other end is connected to the stopper, so that the stopper is driven to move when the telescopic rod is extended, so that the second rotation axis of the telescopic rod and the first rotation axis of the support structure no longer coincide with each other, so that when the ear piece rotates along the first rotation axis, the stopper can be blocked, thereby preventing the ear piece from rotating.

8. The device for connecting and fixing a carrier system to an aircraft according to claim 2, wherein: The spring is wound around the telescopic rod and is always in a stretched state, so that the telescopic rod is always in a tendency to extend.

9. The device for connecting and fixing a carrier system to an aircraft according to claim 1, wherein: The base is square, and fastener fixing holes for fixing fasteners are provided on the four corners of the base.

10. The device for connecting and fixing a carrier system to an aircraft according to claim 9, wherein: The fastener is a bolt.

11. The device for connecting and fixing a carrier system to an aircraft according to claim 5, wherein: When the carrying system is installed on an aircraft, the circular axis of the ear end of the supporting structure is introduced into the first-layer mounting hole of the base through the guide groove. Then, the handle is pulled to move it from the second position to the first position, and the telescopic rod is driven to be inserted into the second-layer mounting hole of the base, thereby fixing the carrying system on the base.

12. A method for installing and operating the device for connecting and fixing a carrier system to an aircraft as claimed in claim 11, comprising the following steps: Step 1: Rotate the support structures on both sides outward around the first rotation axis to a specified position; Step 2: Secure the lock buckles at both ends of the support rods of the support structure to the locking rings of the support, thereby securing the support structure to prevent accidental folding; Step 3: Slowly place the round shafts of the lug ends on both sides of the support structure into the first-layer mounting holes of the base along the guide grooves of the base, so that the carrier system is stably placed on the fuselage and the ground; Step 4: Move the handle from the second position to the first position, driving the telescopic rod to be inserted into the second-layer mounting hole of the base, thereby fixing the carrier system to the fuselage.

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