An unmanned patient transfer device

Abstract

The utility model relates to an unmanned wounded person transfer device, the device makes the sliding platform fall to the ground through the winch, the support connecting rod mechanism, the gear track, moves again through the capstan on the sliding platform and the motion of stretcher support car, makes the stretcher support car move to the ground, the stretcher support car unrolls the conveyer belt, makes the wounded person with certain action ability half -independent on -vehicle. Compared with the existing battlefield rescue mechanism, the utility model can realize the unmanned transfer of the wounded person under the lower cost, can simultaneously transport two wounded persons, and the damping device and the protection pad are arranged on the rescue device, so that the wounded person is safer and more comfortable in the transfer process.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned vehicle rescue technology and relates to an unmanned patient transfer device. Background Technology

[0002] With the increasing power of modern weapons, the number of wounded is also increasing, making battlefield casualty relief increasingly important. Existing unmanned casualty rescue devices, such as an unmanned rescue and transfer device with automatic deployment and retrieval functions (CN109367647A), use an electric cylinder lifting assembly to flip the rescue platform, then use a lead screw to move the unmanned rescue cabin down, and finally use a vehicle-mounted robotic arm to grab the wounded and load them onto the vehicle.

[0003] An unmanned rescue and transfer device with automatic deployment and retraction function (CN109367647A) is suitable for unmanned vehicles with low chassis. When the vehicle height is high, the rescue platform cannot reach the ground. Moreover, the on-board robotic arm mechanism requires a high level of battlefield environment recognition capability, which will increase the cost of the rescue device. In addition, if the recognition system malfunctions when grabbing the wounded, it may cause secondary injury to the wounded. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing unmanned rescue and transfer devices by designing a three-stage deployment transfer mechanism. A winch, supporting linkage mechanism, and gear track bring the sliding platform to the ground. Then, the winch on the sliding platform, along with the movement of the stretcher support trolley, moves the stretcher support trolley to the ground. The stretcher support trolley then deploys its conveyor belt, allowing wounded soldiers with some mobility to semi-autonomously board the trolley. Compared to existing battlefield rescue mechanisms, this invention achieves unmanned transfer of wounded soldiers at a lower cost, can transport two wounded soldiers simultaneously, and is equipped with vibration damping devices and protective pads to make the transfer process safer and more comfortable.

[0005] The technical solution adopted in this utility model is as follows:

[0006] This invention provides an unmanned casualty transport device, which includes an unmanned vehicle chassis 1, a fixing mechanism 2, a sliding platform 3, and a folding stretcher support 4;

[0007] The fixed mechanism 2 includes vibration damping devices 5, guide rails 6, drive gears 7, and a sliding platform winch 8. There are 12 guide rails in total, with three guide rails 6 arranged side by side to form a group, and four groups are welded side by side to the unmanned vehicle chassis 1. There are 12 vibration damping devices 5 in total, with three vibration damping devices 5 arranged in a group, and installed between the unmanned vehicle chassis 1 and a group of guide rails 6. The drive gears 7 are divided into two groups, each group mainly consisting of one drive wheel 11 and two auxiliary wheels 12, and are welded to the top of the rear of the unmanned vehicle chassis 1. The outer side of the drive gears 7 is welded to the guide rails 6. The sliding platform winch 8 is fixed to the top front end of the unmanned vehicle chassis 1.

[0008] The sliding platform 3 includes a support platform 13, a motion track 14, and a folding support stretcher winch 15. The support platform 13 includes a support plate 16, a cable support structure 17, and a stretcher support guide plate 18. The cable support structure 17 is welded to the front end of the inside of the support plate 16. The stretcher support guide plate 18 is welded to both sides of the inside of the support plate 16. The motion track 14 is welded to the bottom of the support platform 13. The central position is a track with a rack structure, and the two sides are two flat tracks. The rack on the motion track 14 meshes with the gear of the drive gear 7, and the drive gear 7 provides power for the forward and backward movement of the sliding platform 3. The motion track 14 under the sliding platform 3 is pressed against the vibration damping device 5 of the fixing mechanism. The folding support stretcher winch 15 is fixed to the front end of the inside of the support platform 13 by bolts.

[0009] The folding stretcher support 4 is a cabin-type mechanism, including a side-tilting door mechanism 19, a conveyor belt system 20, a cabin body 21, a frame guide support 22, and drive wheels 23; the side-tilting door mechanism 19 includes a side-tilting door 24 and an electric push cylinder 25; the side-tilting door 24 is fixed to the side deck of the cabin body 21 by a hinge rod, and one end of the electric push cylinder 25 is fixed to the bottom deck of the cabin body 21 by bolts, while the other end is fixed to the side-tilting door by a linkage mechanism; the conveyor belt system 20 includes two conveyor belts 26 and a motor cover plate 27. Two drive wheels 28 and two conveyor belt motors 29 are installed. The drive wheels 28, conveyor belt motors 29 and motor cover plates are fixed to the side door 24 by bolts. The conveyor belt 26 is installed on the drive wheels 28. The frame guide bracket 22 is welded inside the cabin 21. The four corners of the frame guide bracket 22 are equipped with the stretcher bracket top shaft 33. The folding stretcher bracket winch 15 pulls the traction ring 32 to move it towards the front of the vehicle. The four drive wheels 23 are fixed to the frame bracket 22 by bolts.

[0010] Furthermore, the vibration damping device 5 mainly consists of a vibration damper 9 and a slider 10. The vibration damper 9 has a mechanical interface at the bottom, which is connected to the unmanned vehicle chassis by fasteners. The slider 10 is a smooth steel plate that is welded on top of the vibration damper 9.

[0011] Furthermore, the internal structure of the damper 9 uses a cylindrical spring as a damping support element, and the surface of the slider 10 is covered with copper foil.

[0012] Furthermore, the bearing plate 16 is made of aluminum profile metal welding, and the tail is upturned fish tail shape.

[0013] Furthermore, the stretcher support guide plate 18 is made of bent aluminum profile.

[0014] Furthermore, hull 21 is constructed from aluminum panels and carries other rescue agencies.

[0015] Furthermore, the frame guide support 22 is mainly composed of an aluminum frame 30, four stretcher support top shafts 31 and traction rings 32. The aluminum frame 30 is made of aluminum tubes spliced ​​together, with traction rings 32 welded to the front end, and stretcher support top shafts 31 welded to the four corners of the aluminum frame 30.

[0016] Furthermore, the traction ring 32 is made of aluminum plate and the top shaft 31 of the stretcher support is a bearing roller.

[0017] Furthermore, all four drive wheels 23 can be driven and controlled independently.

[0018] Further, the unfolding process is as follows: the active wheel 11 on the unmanned vehicle chassis 1 begins to rotate, driving the motion track 14 on the sliding platform 3 to move along the guide rail 6 on the unmanned vehicle chassis towards the rear of the vehicle; since the folding stretcher support 4 is connected to the sliding platform 3 by ropes, the sliding platform winch 8 needs to start releasing the ropes synchronously.

[0019] When the sliding platform 3 reaches the unfolded position, the electric push cylinder of the support linkage mechanism 33 begins to push the support linkage. The sliding platform 3 and the support linkage are connected by the motion track 14. The support linkage rotates towards the ground side together with the motion track 14 until the roller of the sliding platform 3 contacts the ground, thus realizing the full unfolding of the sliding platform 3.

[0020] After the sliding platform 3 reaches the ground, the folding stretcher support winch 15 starts to release the rope, and the drive wheel 23 on the folding stretcher support 4 starts to move synchronously. The folding stretcher support 4 begins to move towards the ground. During this process, the frame guide support 22 on the folding stretcher support 4 moves downward along the stretcher support guide plate 18 on the sliding platform 3 until the rope on the folding stretcher support winch 15 is released to the limit position. At this time, the folding stretcher support 4 just touches the ground and reaches the working position.

[0021] At this time, the electric cylinder 25 on the side-flipping door mechanism 19 on the folding stretcher support 4 moves forward. The electric cylinder drives the linkage mechanism, causing the side-flipping door 24 to open until it touches the ground. The two conveyor belt motors 29 on the conveyor belt system 20 drive the two drive wheels 28 to roll through gears. The drive wheels 28 drive the conveyor belt 26 to roll. The injured person moves their body above the conveyor belt. Under the action of the conveyor belt, the injured person moves to the center position of the folding stretcher support 4. Finally, the whole body moves to the protective pad inside the stretcher support 4, and the unfolding process is completed.

[0022] Withdrawal process: After the wounded person is secured with bandages, the side-flipping door mechanism 19 begins to move in the opposite direction, causing the side-flipping door 24 to close. After the side-flipping door 24 is completely closed, the folding stretcher support winch 15 on the folding stretcher support 4 begins to retract the rope until the frame guide support 22 on the folding stretcher support 4 is limited by the stretcher support guide support 18 on the sliding platform 3. Then, the sliding platform winch 8 begins to retract the rope, driving the gear 7 to rotate synchronously in the opposite direction, causing the sliding platform 3 to move towards the roof 1 of the unmanned vehicle chassis.

[0023] The advantages of this utility model compared with the prior art are:

[0024] 1. It can achieve unmanned transfer of wounded soldiers at a relatively low cost.

[0025] 2. Capable of transporting two wounded soldiers simultaneously;

[0026] 3. The rescue equipment is equipped with shock-absorbing devices and protective pads, making the transfer of the injured safer and more comfortable. Attached Figure Description

[0027] Figure 1 It describes the external shape and installation location of each component;

[0028] Figure 2 This is a structural diagram of the fixed mechanism;

[0029] Figure 3 This is a schematic diagram of a vibration damping device;

[0030] Figure 4 It is a set of driving gears;

[0031] Figure 5 This is a schematic diagram of the sliding platform components;

[0032] Figure 6 This is a schematic diagram of the platform's components;

[0033] Figure 7 This is a schematic diagram of the motion trajectory;

[0034] Figure 8 This is a schematic diagram of the outer dimensions of a folding support stretcher;

[0035] Figure 9 This is a schematic diagram of a side-opening door system;

[0036] Figure 10 This is a schematic diagram of a conveyor belt system;

[0037] Figure 11 This is a schematic diagram of frame support 22;

[0038] Figure 12 This is a schematic diagram of the overall structure of an unmanned casualty transport device;

[0039] Figures 13 to 18 This is a schematic diagram of the unfolding process of the sliding platform.

[0040] In the diagram: 1. Unmanned vehicle chassis 2. Fixing mechanism 3. Sliding platform 4. Folding stretcher support 5. Vibration damping device 6. Guide rail 7. Drive gear 8. Sliding platform winch 9. Vibration damper 10. Sliding block 11. Drive wheel 12. Auxiliary wheel 13. Bearing platform 14. Movement track 15. Folding stretcher support winch 16. Bearing plate 17. Cable support structure 18. Stretcher support guide plate 19. Side-opening door mechanism 20. Conveyor belt system 21. Cabin 22. Frame guide support 23. Drive wheel 24. Side-opening door 25. Electric push cylinder 26. Conveyor belt 27. Motor cover plate 28. Conveyor belt drive wheel 29. Conveyor belt motor 30. Aluminum frame 31. Stretcher support top shaft 32. Traction ring 33. Support linkage mechanism Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings.

[0042] The unmanned casualty transport device mainly consists of an unmanned vehicle chassis (1), a fixing mechanism (2), a sliding platform (3), and a folding stretcher support (4). The external appearance and installation location of each mechanism are as follows: Figure 1 As shown.

[0043] The unmanned vehicle chassis 1 uses a general-purpose product that meets the requirements for installation dimensions and load-bearing weight of the unmanned casualty transport device, and will not be described in detail here.

[0044] The fixed mechanism 2 mainly consists of a vibration damping device 5, a guide rail 6, a drive gear 7, and a sliding platform winch 8, such as... Figure 2 As shown.

[0045] The vibration damping device 5 mainly consists of vibration dampers 9 and sliders 10. It is located between the unmanned vehicle chassis 1 and the guide rail 6, with a total of 12 locations. Mechanical interfaces are provided below the vibration dampers 9, which are then connected to the unmanned vehicle chassis using fasteners. Figure 3 As shown.

[0046] The shock absorber 9 uses a cylindrical spring as the vibration damping support element. The product is available on the market and will not be described here.

[0047] The slider 10 is a smooth steel plate covered with copper foil and welded above the shock absorber 9.

[0048] The guide rails 6 are made of steel plates, and there are 12 of them. Three guide rails 6 form a group, and four groups are welded side by side to the unmanned vehicle chassis 1.

[0049] The drive gear 7 is divided into two groups, each group mainly consisting of one drive wheel 11 and two auxiliary wheels 12, welded to the top of the rear of the unmanned vehicle chassis 1. A total of two groups are welded, with the following appearance. Figure 4 As shown.

[0050] The outer side of the drive gear is welded to the guide rail 6 to increase structural strength.

[0051] The sliding platform winch 8 is a commercially available product, which is fixed to the front top of the unmanned vehicle chassis 1 with bolts. It will not be described in detail here.

[0052] The sliding platform 3 mainly consists of a bearing platform 13, a motion track 14, a folding support stretcher winch 15, and so on. Figure 5 As shown.

[0053] Platform 13 (e.g.) Figure 6 (As shown) It is mainly composed of a bearing plate 16, a cable support structure 17, and a stretcher support guide plate 18.

[0054] The support plate 16 is made of welded aluminum profiles, with an upturned fishtail shape at the rear. In the front and rear directions of the vehicle, the width of the support plate 16 is slightly larger than the width of the frame guide bracket 22, which allows the folding stretcher bracket 4 to be positioned in the middle of the sliding platform 3, restricting the folding stretcher bracket 4 from moving in the left and right directions.

[0055] The cable support structure 17 is cut from an aluminum plate and welded to the front end of the inner side of the bearing plate 16. The wire rope of the folding stretcher support winch is fixed to the middle of the top of the bearing plate 16 through it.

[0056] The stretcher support guide plate 18 is made of bent aluminum profile and welded to both sides inside the bearing plate 16.

[0057] The motion track 14 is welded below the support platform 13. The central position features a track with a rack and pinion structure, while the two sides consist of two flat tracks. The structure is as follows: Figure 7As shown. The rack on the motion track 14 meshes with the gear of the drive gear 7, which provides power for the forward and backward movement of the sliding platform 3. The innermost width of the motion track 14 is slightly larger than the outermost width of the guide rail 6, allowing the motion track 14 to wrap around the guide rail 6, forming a lateral limit when the sliding platform moves forward and backward. The motion track 14 under the sliding platform 3 presses against the vibration damping device 5 of the fixed mechanism, and the bearing platform 13 presses against the vibration damping device 5 through the motion track 14. The vibration damping device 5 provides a vertical upward support force for the sliding platform and also plays a role in damping vibrations during vehicle movement.

[0058] The folding support stretcher winch 15 is a product that can be purchased on the market and is fixed to the front end of the bearing platform 13 with bolts. It will not be described here.

[0059] The folding stretcher support 4 is a cabin-type mechanism, mainly composed of a side-tilting door mechanism 19, a conveyor belt system 20, a cabin body 21, a frame guide support 22, and drive wheels 23, as detailed below. Figure 8 As shown.

[0060] The side-tilting door mechanism 19 mainly consists of the side-tilting door 24 and the electric push cylinder 25, such as Figure 9 As shown.

[0061] The side-tipping door 24 is made of aluminum plate and is fixed to the side deck of the cabin 21 by hinge rods. One end of the electric propulsion cylinder 25 is fixed to the bottom deck of the cabin 21 by bolts, and the other end is fixed to the side-tipping door by a linkage mechanism.

[0062] The conveyor system 20 mainly consists of two conveyor belts 26, a motor cover plate 27, two drive pulleys 28, and two conveyor motors 29. (See below) Figure 10 As shown.

[0063] The drive wheel 28, the conveyor belt motor 29, and the motor cover are fixed to the side-opening door 24 by bolts, and the conveyor belt 26 is installed on the drive wheel 28.

[0064] The hull 21 is made of aluminum panels and carries other rescue agencies.

[0065] The frame guide support 22 is welded inside the cabin 21 and mainly consists of an aluminum frame 30, four stretcher support top shafts 31, and a traction ring 32. (See below) Figure 11 As shown.

[0066] The aluminum frame 30 is constructed by interlocking aluminum tubes, with a towing ring 32 welded to the front end. Stretcher support shafts 31 are welded to the four corners of the aluminum frame 30. Its shape follows the cabin design to ensure the comfort of the rescued personnel.

[0067] The traction ring 32 is made of aluminum plate.

[0068] The top shaft 31 of the stretcher support is a bearing roller, which is a common product on the market and will not be described here.

[0069] Four vertical steel pipes are welded to the four corners of the frame bracket 22. The center of the steel pipe has a through hole, the diameter of which is slightly larger than the diameter of the fixing bolt. The mounting surfaces of the four drive wheels 23 have threaded holes. The four drive wheels 23 are fixed to the frame bracket 22 by bolts. An integrated hub motor is used, and each drive wheel can be installed and driven independently. Common products on the market are used, and will not be described here.

[0070] In the front and rear directions of the vehicle, the width of the support plate 16 is slightly larger than the width of the frame guide bracket 22, which allows the folding stretcher bracket 4 to be positioned exactly in the middle of the sliding platform 3, restricting the lateral movement of the folding stretcher bracket 4. The width of the stretcher bracket guide plate 18 is slightly larger than the diameter of the stretcher bracket top shaft 33, allowing the stretcher bracket top shaft 33 to roll just in the middle of the stretcher bracket guide plate 18. The four corners of the stretcher bracket top shaft 33 restrict the vertical movement of the folding stretcher bracket 4.

[0071] The foremost track of the stretcher support guide plate 18 has a closed arc structure. When the folding stretcher support winch 15 pulls the traction ring 32 towards the front of the vehicle, the top shaft 33 of the stretcher support will be locked in the arc groove of the stretcher support guide plate 18, restricting the forward movement of the folding stretcher support 4. By setting the rope length of the folding stretcher winch 15, the folding stretcher support 4 can be made to stop moving backward immediately after landing, thus restricting the backward movement of the folding stretcher support 4.

[0072] The overall structure of the unmanned casualty transport device is as follows: Figure 12 As shown. The complete rescue operation of the unmanned casualty transport device module is divided into deployment and withdrawal processes. The complete rescue process and the location reached are as follows.

[0073] Deployment Process: After the unmanned casualty transport device arrives at the designated location and detects the casualty, it begins to deploy. The drive wheel 11 on the unmanned vehicle chassis 1 begins to rotate, driving the motion track 14 on the sliding platform 3 to move along the guide rail 6 on the unmanned vehicle chassis towards the rear of the vehicle. Since the folding stretcher support 4 is connected to the sliding platform 3 by ropes, the sliding platform winch 8 needs to start releasing the ropes synchronously.

[0074] When the sliding platform 3 reaches the unfolded position 1, the electric pusher cylinder of the support linkage mechanism 33 begins to push the support linkage. The sliding platform 3 and the support linkage are connected by the motion rail 14. The support linkage rotates towards the ground along with the motion rail 14 until the rollers of the sliding platform 3 contact the ground, thus achieving the full unfolding of the sliding platform 3. The schematic diagram is as follows: Figures 13 to 17 As shown.

[0075] The folding stretcher support 4 and the sliding platform 3 are connected by ropes on the folding stretcher support winch 15. After the sliding platform 3 reaches the ground, the folding stretcher support winch 15 begins to release the rope, and the drive wheel 23 on the folding stretcher support 4 starts to move synchronously, causing the folding stretcher support 4 to begin moving towards the ground. During this process, the frame guide support 22 on the folding stretcher support 4 moves downward along the stretcher support guide plate 18 on the sliding platform 3 until the rope on the folding stretcher support winch 15 is at its limit position. At this point, the folding stretcher support 4 just touches the ground and reaches the working position.

[0076] At this time, the electric cylinder 25 on the side-tilting door mechanism 19 of the folding stretcher support 4 moves forward, and the electric cylinder drives the linkage mechanism, causing the side-tilting door 24 to open until it touches the ground. The two conveyor belt motors 29 on the conveyor belt system 20 drive the two drive wheels 28 to roll through gears. The drive wheels 28 drive the conveyor belt 26 to roll. The injured person moves their body above the conveyor belt. Under the action of the conveyor belt, the injured person moves to the center position of the folding stretcher support 4, and finally the whole body moves onto the protective pad inside the stretcher support 4. The unfolding process is thus completed. The schematic diagram of the sliding platform unfolding process is as follows. Figures 13 to 18 As shown. Withdrawal process: After the injured person is secured with bandages, the side-tilting door mechanism 19 begins its reverse movement, closing the side-tilting door 24. Once the side-tilting door 24 is fully closed, the folding stretcher support winch 15 on the folding stretcher support 4 begins its rope-reeling action until the frame guide support 22 on the folding stretcher support 4 is limited by the stretcher support guide support 18 on the sliding platform 3. Afterwards, the sliding platform winch 8 begins its rope-reeling action, driving the gear 7 to rotate synchronously in the opposite direction, moving the sliding platform 3 towards the roof 1 of the unmanned vehicle chassis. During the return journey, the vibration damping device 5 remains active to prevent secondary injuries to the injured person from vibrations, turns, etc.

Claims

1. An unmanned casualty transport device, characterized in that, The device includes an unmanned vehicle chassis (1), a fixing mechanism (2), a sliding platform (3), and a folding stretcher support (4). The fixed mechanism (2) includes a vibration damping device (5), a guide rail (6), a drive gear (7), and a sliding platform winch (8); there are 12 guide rails (6), three guide rails (6) are arranged side by side to form a group, and four groups are welded side by side to the unmanned vehicle chassis (1); there are 12 vibration damping devices (5), three vibration damping devices (5) are arranged in a group, and are installed between the unmanned vehicle chassis (1) and a group of guide rails (6); the drive gear (7) is divided into two groups, each group mainly consists of one drive wheel (11) and two auxiliary wheels (12), which are welded to the top of the rear of the unmanned vehicle chassis (1), and the outer side of the drive gear (7) is welded to the guide rail (6); the sliding platform winch (8) is fixed to the front end of the top of the unmanned vehicle chassis (1); The sliding platform (3) includes a bearing platform (13), a motion track (14), and a folding stretcher support winch (15); the bearing platform (13) includes a bearing plate (16), a cable support structure (17), and a stretcher support guide plate (18); the cable support structure (17) is welded to the front end of the bearing plate (16); the stretcher support guide plate (18) is welded to both sides of the bearing plate (16); the motion track (14) is welded to the bottom of the bearing platform (13), with a rack and pinion track in the center and two flat tracks on both sides. The rack on the motion track (14) meshes with the gear of the drive gear (7), and the drive gear (7) provides power for the forward and backward movement of the sliding platform (3); the motion track (14) under the sliding platform (3) presses on the vibration damping device (5) of the fixing mechanism; the folding stretcher support winch (15) is fixed to the front end of the bearing platform (13) by bolts; The folding stretcher support (4) is a cabin-type mechanism, including a side-tilting door mechanism (19), a conveyor belt system (20), a cabin body (21), a frame guide support (22), and drive wheels (23); the side-tilting door mechanism (19) includes a side-tilting door (24) and an electric push cylinder (25); the side-tilting door (24) is fixed to the side deck of the cabin body (21) by a hinge rod, and one end of the electric push cylinder (25) is fixed to the bottom deck of the cabin body (21) by bolts, and the other end is fixed to the side-tilting door by a linkage mechanism; the conveyor belt system (20) includes two conveyor belts (26) and a motor cover plate (27). Two drive wheels (28) and two conveyor belt motors (29); the drive wheels (28), the conveyor belt motors (29), and the motor cover are fixed to the side door (24) by bolts, and the conveyor belt (26) is installed on the drive wheels (28); the frame guide bracket (22) is welded inside the cabin (21), and the four corners of the frame guide bracket (22) are provided with the stretcher bracket top shaft (31); the folding stretcher bracket winch (15) pulls the traction ring (32) to move towards the front of the vehicle; the four drive wheels (23) are fixed to the frame guide bracket (22) by bolts.

2. The unmanned casualty transport device as described in claim 1, characterized in that, The vibration damping device (5) is mainly composed of a vibration damper (9) and a slider (10). The vibration damper (9) has a mechanical interface at the bottom, which is connected to the unmanned vehicle chassis by fasteners. The slider (10) is a smooth steel plate, which is welded on top of the vibration damper (9).

3. The unmanned casualty transport device as described in claim 2, characterized in that, The shock absorber (9) uses a cylindrical spring as a shock-absorbing support element, and the slider (10) is covered with copper foil.

4. The unmanned casualty transport device as described in claim 1, characterized in that, The support plate (16) is made of aluminum profile metal welding, and the tail is upturned fish tail shape.

5. The unmanned casualty transport device as described in claim 1, characterized in that, The stretcher support guide plate (18) is made of bent aluminum profile.

6. The unmanned casualty transport device as described in claim 1, characterized in that, The hull (21) is made of aluminum panels and carries other rescue agencies.

7. The unmanned casualty transport device as described in claim 1, characterized in that, The frame guide support (22) is mainly composed of an aluminum frame (30), four stretcher support top shafts (31) and a traction ring (32). The aluminum frame (30) is made of aluminum tubes spliced ​​together, with a traction ring (32) welded to the front end, and the stretcher support top shafts (31) welded to the four corners of the aluminum frame (30).

8. The unmanned casualty transport device as described in claim 7, characterized in that, The traction ring (32) is made of aluminum plate and the top shaft (31) of the stretcher support is a bearing roller.

9. The unmanned casualty transport device as described in claim 1, characterized in that, Each of the four drive wheels (23) can be driven and controlled independently.

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