Medical unmanned rescue transfer device with automatic folding and unfolding function

Abstract

The invention relates to the technical field of rescue, in particular to a medical unmanned rescue transfer device with an automatic folding and unfolding function, which comprises a ship body and further comprises a double-shaft motor, a water wheel, a controller, a storage battery, a steering gear, a traction mechanism and a stretching mechanism, the double-shaft motor is mounted on the rear side of an inner cavity of the ship body, and the output end of the double-shaft motor extends out of the outer wall of the ship body; the water wheel is installed at the output end of the double-shaft motor, and the water wheel rotates to poke the water surface so that the ship body can move. A controller and a storage battery are installed at the left end and the right end of the front side of an inner cavity of the ship body correspondingly. The controller is electrically connected with the storage battery and the double-shaft motor. The steering gear is installed at the front end of an inner cavity of the hull to adjust the moving direction of the hull. The traction mechanism is arranged at the front end of the upper surface of the ship body; the stretching mechanism is arranged at the rear end of the ship body. And moreover, the ship body is small in size, small in occupied water area space, high in running speed and high in rescue efficiency.

Description

Technical Field

[0001] The present invention relates to the field of rescue technology, and in particular to an unmanned medical rescue and transport device with an automatic retraction and extension function. Background Art

[0002] Rescue refers to the entire process of obtaining rescue actions when an individual or group of people encounters a disaster or other extraordinary situation (including natural disasters, accidents, sudden dangerous events, etc.). Common disasters include fire and flood; For those who rely on water resources for production and life, floods are very dangerous. Once someone is trapped by water, firefighters or rescuers often rely on boats to travel to the rescue site. During the rescue process, they need to notify the rescuers, rush to the scene, and then drive the boat to the rescue site after arriving at the rescue site. The process is relatively cumbersome and it is easy to miss the best rescue time. In addition, the boat is large in size, occupies a large area of ​​water, has a slow driving speed, and has low rescue efficiency. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art in that the rescue process is complicated, not timely enough and the rescue efficiency is low, the technical problem to be solved by the present invention is a medical unmanned rescue and transport device with automatic retraction and extension function.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a medical unmanned rescue and transfer device with an automatic retraction and extension function, comprising a hull, a dual-axis motor, a water wheel, a controller, a battery, a steering gear, a traction mechanism and an extension mechanism, wherein the dual-axis motor is installed at the rear side of the inner cavity of the hull, and the output end of the dual-axis motor extends out of the outer wall of the hull; the water wheel is installed at the output end of the dual-axis motor, and the hull is moved by rotating the water wheel to move the water surface; the controller and the battery are respectively installed at the left and right ends of the front side of the inner cavity of the hull, and the controller is electrically connected to the battery and the dual-axis motor; the steering gear is installed at the front end of the inner cavity of the hull to adjust the direction of movement of the hull; the traction mechanism is arranged at the front end of the upper surface of the hull; and the extension mechanism is arranged at the rear end of the hull.

[0005] The steering gear includes a steering motor and a turning plate. The steering motor is installed at the front end of the inner cavity of the hull. The steering motor is electrically connected to the controller, and the turning plate is installed at the output end of the steering motor. When the steering motor drives the turning plate to rotate clockwise or counterclockwise, the angle of the turning plate relative to the hull is changed, and the direction of the hull's movement is adjusted by the resistance of the turning plate to water.

[0006] The purpose is to achieve hull traction, increase the hull's moving power in the water, and improve rescue efficiency. The traction mechanism includes a base, a winding motor, a reel, a rope, a guide plate, a tensile assembly and a ground spike. The base is fixedly connected to the front end of the upper surface of the hull; the winding motor is installed at the top of the right side wall of the base, and the winding motor is electrically connected to the controller; one end of the reel is installed at the output end of the winding motor, and the other end is connected to the left inner wall of the base through a bearing; the rope is wrapped around the outer wall of the reel, and the rope is wound or released by rotating the reel clockwise or counterclockwise; the guide plate is fixedly connected to the middle of the front of the base, and the center of the guide plate is hollow, and the rope is limited by passing through the guide plate; the tensile assembly is installed at one end of the rope; the ground spike is fixedly connected to the bottom end of the tensile assembly.

[0007] Preferably, the purpose is to support the box body and ensure the stability of the rope fixation, the tensile assembly includes a box body, a first rotating shaft, a rotating disk, a positioning blind hole, a support rod, a support plate, a knob, a cam, a limit rod, a spring, a limit plate and a pin, the box body is tied to one end of the rope, and the bottom end of the box body is fixedly connected to the top end of the ground drill; the first rotating shaft is installed in the middle of the box body cavity in the front and rear directions through a bearing so as to be rotatable around its own axis; the rotating disk is installed on the outer wall of the first rotating shaft, and a plurality of positioning blind holes are opened on the outer wall of the rotating disk along the circumferential direction; one end of the support rod is installed on the outer wall of the rotating disk; The support plate is connected to the other end of the support rod through a pin shaft. When the support plate contacts the ground, the support rod can support the box body; the knob is installed on the front side of the box body and can rotate around its own axis through a bearing; the cam is installed at the rear end of the knob; the limit rod is inserted into the top of the box body and can slide up and down. The limit rod is rectangular in shape and will not rotate when sliding; the spring is sleeved on the outer wall of the limit rod; the limit plate is installed on the outer wall of the limit rod; the pin is installed at the bottom end of the limit rod, and the limit plate is pressed down under the action of the spring elastic force, and the limit rod moves downward to allow the pin to be inserted into the inner cavity of the positioning blind hole.

[0008] Preferably, the number of the positioning blind holes is at least twelve, and the plurality of positioning blind holes are equidistantly distributed on the outer wall of the turntable along the circumferential direction.

[0009] Preferably, the bottom of the pin is conical in shape.

[0010] Preferably, the purpose is to realize the retraction and deployment of the airbag. When the volume becomes smaller, the hull can quickly reach the rescue site, and when the volume increases, a safe space is provided for the rescued person. The extension mechanism includes a box, a fan, a worm motor, a worm, a second rotating shaft, a worm wheel, a first connecting rod, a second connecting rod, a movable plate, an airbag and a one-way valve. The box is fixedly connected to the rear end of the hull; the fan is installed on the upper surface of the box, and the fan is electrically connected to the controller; the worm motor is installed on the right side wall of the box, and the worm motor is electrically connected to the controller; one end of the worm is installed on the output end of the worm motor, and the other end is connected to the left inner wall of the box through a bearing; the second rotating shaft There are two of them, which are installed at the left and right ends of the inner cavity of the box and can rotate around their own axes through bearings; the worm gear is installed at the top of the outer wall of the second rotating shaft, and the worm gear is meshed with the worm; one end of the first connecting rod is installed at the bottom end of the outer wall of the second rotating shaft; one end of the second connecting rod is connected to the other end of the first connecting rod through a pin; the movable plate is connected to the other end of the second connecting rod through a pin; one side of the airbag is installed on the front side of the movable plate, and the other side is installed at the rear end of the box; the one-way valve is installed at the front end of the upper surface of the airbag, and the one-way valve is connected to the fan through an air pipe. The inner cavity of the airbag is inflated by the operation of the fan, and the expansion of the airbag can increase the buoyancy.

[0011] When the worm motor drives the worm to rotate clockwise or counterclockwise, the two second rotating shafts rotate in opposite directions under the transmission of the worm and the worm wheel, so that the two first connecting rods can move inward or outward at the same time, and the angle between the first connecting rod and the second connecting rod gradually increases or decreases, allowing the movable plate to move backward or forward, thereby achieving the function of retracting and deploying the airbag.

[0012] Preferably, the threads on the left and right sides of the outer wall of the worm are forward and reverse threads.

[0013] Preferably, handles are installed on the upper surface of the movable plate and the airbag.

[0014] Preferably, the outer wall of the airbag is wavy in shape.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can make the cam squeeze the limit plate and move upward by turning the knob, so that the pin moves upward and out of the positioning blind hole, releasing the positioning of the turntable. The support rod can swing so that the support plate falls to the ground. Under the action of the spring elastic force, the pin can move downward and insert into the positioning blind hole at the corresponding position, positioning the turntable after rotation, so that the support rod supports the box body and resists the traction of the rope on the box body. The worm motor can make the worm rotate clockwise or counterclockwise. Under the transmission of the worm and the worm wheel, the two second rotating shafts rotate in opposite directions, so that the two The first connecting rod swings inward or outward at the same time, the angle between the first connecting rod and the second connecting rod gradually increases or decreases, the movable plate can move backward or forward, and the airbag is extended or shortened. When the airbag is shortened, it is convenient for the hull to move toward the rescue site. After the airbag is extended, the fan inflates the airbag to increase the buoyancy of the airbag. The airbag provides a safe space for the rescued person. When the winding motor drives the reel to rotate clockwise, the rope is wound up, and the rescued person can save himself and the rescue is timely. In addition, the hull is small in size, occupies little water space, has a fast travel speed, and has high rescue efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a top view cross-sectional view of the hull of the present invention; Figure 3 This is a schematic structural diagram of the steering gear of the present invention; Figure 4 This is a structural diagram of the traction mechanism of the present invention; Figure 5 It is a right side cross-sectional view of the tensile component of the present invention; Figure 6 For the present invention Figure 5 A magnified view of point A in the figure; Figure 7 It is a top sectional view of the extension mechanism of the present invention.

[0017] Figure: 1. Hull; 2. Dual-axis motor; 3. Water wheel; 4. Controller; 5. Battery; 6. Steering gear; 7. Traction mechanism; 8. Extension mechanism; 61. Steering motor; 62. Turntable; 71. Base; 72. Winding motor; 73. Reel; 74. Rope; 75. Guide plate; 76. Tensile assembly; 77. Ground stake; 761. Box; 762. First rotating shaft; 763. Turntable; 764. Positioning blind Hole; 765, support rod; 766, support plate; 767, knob; 768, cam; 769, limit rod; 7610, spring; 7611, limit plate; 7612, pin; 81, housing; 82, fan; 83, worm motor; 84, worm; 85, second shaft; 86, worm gear; 87, first connecting rod; 88, second connecting rod; 89, movable plate; 810, airbag; 811, one-way valve. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The present invention provides a technical solution: an unmanned medical rescue and transport device with automatic retraction and extension function, such as Figure 1-7 As shown, it includes a hull 1, a dual-axis motor 2 is installed on the rear side of the inner cavity of the hull 1, the output end of the dual-axis motor 2 extends out of the outer wall of the hull 1, and water wheels 3 are installed on both output ends of the dual-axis motor 2. The water wheel 3 is driven to rotate by the dual-axis motor 2, and the water wheel 3 can move the water surface to make the hull 1 move. A controller 4 and a battery 5 are respectively installed on the left and right ends of the front side of the inner cavity of the hull 1. The controller 4 is electrically connected to the battery 5 and the dual-axis motor 2. A signal receiver is provided on the controller 4, and the controller 4 can be remotely controlled using a mobile phone or computer. A steering gear 6 is installed at the front end of the inner cavity of the hull 1 to control the moving direction of the hull 1. A traction mechanism 7 is installed at the front end of the upper surface of the hull 1, and an extension mechanism 8 is installed at the rear end of the hull 1.

[0020] The steering gear 6 includes a steering motor 61 and a turning plate 62. The steering motor 61 is installed at the front end of the inner cavity of the hull 1 and is electrically connected to the controller 4. The turning plate 62 is installed at the output end of the steering motor 61. The controller 4 controls the steering motor 61 to drive the turning plate 62 to rotate clockwise or counterclockwise, thereby changing the angle of the turning plate 62 in the water. The moving direction of the hull 1 is adjusted by changing the water-blocking direction of the turning plate 62.

[0021] As a preferred solution, further, the traction mechanism 7 includes a base 71 fixedly connected to the front end of the upper surface of the hull 1, and a winding motor 72 electrically connected to the controller 4 is installed at the top of the right side wall of the base 71, and one end of the reel 73 is installed at the output end of the winding motor 72, and the other end of the reel 73 is connected to the left inner wall of the base 71 through a bearing. A rope 74 is wrapped counterclockwise around the outer wall of the reel 73, and a guide plate 75 is installed on the front of the base 71. The center of the guide plate 75 has a through hole that can limit the rope 74. When the winding motor 72 drives the reel 73 to rotate clockwise or counterclockwise, the reel 73 can reel or release the rope 74. A tensile component 76 is tied to one end of the rope 74, and a ground spike 77 is installed at the bottom end of the tensile component 76. The ground spike 77 penetrates the ground to position the tensile component 76.

[0022] As a preferred solution, further, the tensile component 76 includes a box body 761 tied to the other end of the rope 74, the bottom end of the box body 761 is fixedly connected to the top of the ground drill 77, and the inner cavity of the box body 761 is installed with a first rotating shaft 762 that can rotate around its own axis through a bearing in the front-to-back direction, and a turntable 763 is installed on the outer wall of the first rotating shaft 762. The outer wall of the turntable 763 is provided with a plurality of positioning blind holes 764 along the circumferential direction, and the number of positioning blind holes 764 is at least twelve or more, and one end of the support rod 765 is installed on the outer wall of the turntable 763, and the other end of the support rod 765 is connected to the support plate 766 through a pin shaft. When the support plate 766 is placed on the ground, the support rod 765 supports the box body 761, and a knob that can rotate around its own axis is installed on the front of the box body 761 through a bearing. 767, a cam 768 is installed at the rear end of the knob 767, and a limit rod 769 that can slide up and down is inserted at the top of the box body 761. The limit rod 769 is rectangular in shape to prevent the limit rod 769 from rotating on the box body 761. A spring 7610 is sleeved on the outer wall of the limit rod 769, and a limit plate 7611 is installed on the outer wall of the limit rod 769. The limit plate 7611 is located at the bottom of the spring 7610, and a pin 7612 is installed at the bottom end of the limit rod 769. Under the elastic force of the spring 7610, the limit plate 7611 is pressed down, so that the limit rod 769 drives the pin 7612 to move down and insert into the positioning blind hole 764, thereby positioning the turntable 763. The bottom end of the pin 7612 is conical in shape, which is convenient for the pin 7612 to be inserted into the positioning blind hole 764 when moving downward.

[0023] As a preferred solution, further, several positioning blind holes 764 are evenly distributed along the circumference on the outer wall of the turntable 763, and the positioning blind holes 764 located at different positions on the turntable 763 can all be moved to directly below the pin 7612 to achieve multi-angle positioning of the turntable 763.

[0024] As a preferred embodiment, further, the extension mechanism 8 includes a box body 81 fixedly connected to the rear end of the hull 1, a fan 82 electrically connected to the controller 4 is installed on the upper surface of the box body 81, a worm motor 83 electrically connected to the controller 4 is installed on the right side wall of the box body 81, one end of a worm 84 is installed at the output end of the worm motor 83, and the other end of the worm 84 is connected to the left inner wall of the box body 81 through a bearing, and a second rotating shaft 85 capable of rotating around its own axis is installed on both sides of the inner cavity of the box body 81 through bearings, and a worm wheel 86 capable of meshing with the worm 84 is installed at the top of the outer wall of the second rotating shaft 85. The threads on the left and right sides of the outer wall of the worm 84 are positive and negative threads. When the worm 84 rotates clockwise or counterclockwise under the drive of the worm motor 83, the worm 84 can drive the two worm wheels 86 to rotate in opposite directions, thereby causing the two second rotating shafts 85 to rotate inversely. The second rotating shaft 85 rotates in the direction of rotation, and one end of the first connecting rod 87 is installed at the bottom end of the outer wall of the second rotating shaft 85. The other end of the first connecting rod 87 is connected to one end of the second connecting rod 88 through a pin shaft. The other end of the second connecting rod 88 is connected to a movable plate 89 through a pin shaft. One side of the airbag 810 is installed on the front of the movable plate 89, and the other side of the airbag 810 is installed with the rear end of the box body 81. The outer wall of the airbag 810 is wavy. Due to the special shape of the airbag 810, it can be extended and retracted when the movable plate 89 moves back and forth. Handles are installed on the upper surfaces of the movable plate 89 and the airbag 810. The handles are for the rescued person to hold to avoid falling from the airbag 810. A one-way valve 811 is installed on the front end of the upper surface of the airbag 810. The one-way valve 811 is connected to the fan 82 through an air pipe. The fan 82 is used to inflate the airbag 810. The one-way valve 811 prevents the gas entering the airbag 810 from being discharged.

[0025] Working principle: Step 1: The hull 1 is placed in the water area where the rescued person is trapped, the ground spike 77 is inserted into the ground, and the knob 767 is turned to cause the cam 768 to rotate and squeeze the limit plate 7611 to move upward. The limit rod 769 slides upward to allow the pin 7612 to disengage from the positioning blind hole 764, releasing the positioning of the turntable 763. The support rod 765 and the support plate 766 swing downward under their own gravity until the support plate 766 is in stable contact with the ground. The knob 767 is released, and the spring 7610 pushes the limit rod 769 downward under its own elastic force, so that the pin 7612 is inserted into the positioning blind hole 764 at the corresponding position, positioning the turntable 763. The support rod 765 supports the box body 761 through the ground to achieve the fixation of the rope 74. Step 2: The rescued person controls the controller 4 via a mobile phone or computer. The controller 4 controls the reeling motor 72 to rotate the reel 73 counterclockwise to release the rope 74. At the same time, the dual-axis motor 2 rotates the water wheel 3, which paddles the water surface to move the hull 1 toward the rescued person. Under the control of the controller 4, the steering motor 61 can rotate clockwise or counterclockwise, changing the angle of the turn plate 62, thereby changing the direction of movement of the hull 1, allowing the hull 1 to accurately reach the rescue location. Step 3: Under the control of the controller 4, the fan 82 and the worm motor 83 work, the worm motor 83 drives the worm 84 to rotate, and the two second rotating shafts 85 rotate in opposite directions under the transmission of the worm 84 and the worm wheel 86. The first connecting rod 87 swings inward, and the angle between the first connecting rod 87 and the second connecting rod 88 gradually increases, pushing the movable plate 89 backward until the first connecting rod 87 and the second connecting rod 88 are in a straight line. The movable plate 89 stretches the airbag 810, and the fan 82 inflates the airbag 810. As the airbag 810 expands, the buoyancy of the airbag 810 increases, and the rescued person comes to the surface of the airbag 810. The buoyancy of the airbag 810 makes the rescued person float on the water; Step 4: The dual-axis motor 2 drives the water wheel 3 to rotate in the opposite direction, and at the same time the winding motor 72 drives the reel 73 to rotate the winding rope 74 clockwise. The support rod 765 supports the force to resist the traction force of the rope 74, so that the box body 761 will not be brought into the water. Under the dual force, the hull 1 can quickly sail to the shore and rescue the person being rescued.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A medical unmanned rescue and transport device with an automatic retraction and deployment function, comprising a hull (1), characterized in that: The unmanned medical rescue and transport device with automatic retraction function also includes: A dual-shaft motor (2) is mounted on the rear side of the inner cavity of the hull (1), with the output end of the dual-shaft motor (2) extending out of the outer wall of the hull (1); A water wheel (3) is installed at the output end of the dual-shaft motor (2), and the water wheel (3) rotates to move the water surface so that the hull (1) moves; The controller (4) and the battery (5) are respectively installed at the left and right ends of the front side of the inner cavity of the hull (1), and the controller (4) is electrically connected to the battery (5) and the dual-axis motor (2); A steering gear (6) is mounted at the front end of the inner cavity of the hull (1) to adjust the moving direction of the hull (1); A traction mechanism (7) is arranged at the front end of the upper surface of the hull (1); An extension mechanism (8) is arranged at the rear end of the hull (1); The steering gear (6) includes a steering motor (61) and a rotating plate (62), wherein the steering motor (61) is installed at the front end of the inner cavity of the hull (1), the steering motor (61) is electrically connected to the controller (4), and the rotating plate (62) is installed at the output end of the steering motor (61); The traction mechanism (7) comprises: A base (71) fixedly connected to the front end of the upper surface of the hull (1); A winding motor (72) is mounted on the top of the right side wall of the base (71), and the winding motor (72) is electrically connected to the controller (4); A reel (73), one end of which is mounted on the output end of the reeling motor (72), and the other end of which is connected to the left inner wall of the base (71) via a bearing; A rope (74) is wound around the outer wall of the reel (73), and the rope (74) is wound or released by rotating the reel (73) clockwise or counterclockwise; A guide plate (75) is fixedly connected to the middle of the front side of the base (71), and the center of the guide plate (75) is hollow, and the rope (74) passes through the guide plate (75) to be limited; A tensile assembly (76) mounted on one end of the rope (74); A ground spike (77) is fixedly connected to the bottom end of the tensile component (76).

2. The unmanned medical rescue and transport device with automatic retraction function according to claim 1, characterized in that: The tensile component (76) comprises: The box body (761) is tied to one end of the rope (74), and the bottom end of the box body (761) is fixedly connected to the top end of the ground rod (77); A first rotating shaft (762) is installed in the middle of the inner cavity of the box body (761) via a bearing so as to be rotatable around its own axis in the front-back direction; A rotating disk (763) is mounted on the outer wall of the first rotating shaft (762), and a plurality of positioning blind holes (764) are opened on the outer wall of the rotating disk (763) along the circumferential direction; A support rod (765), one end of which is mounted on the outer wall of the turntable (763); A support plate (766) is connected to the other end of the support rod (765) via a pin, and when the support plate (766) contacts the ground, the support rod (765) can support the box body (761); A knob (767) is mounted on the front of the box body (761) via a bearing and is rotatable around its own axis; A cam (768) mounted on the rear end of the knob (767); A limiting rod (769) is inserted into the top of the box body (761) so as to be slidable up and down. The limiting rod (769) is rectangular in shape and does not rotate when sliding. A spring (7610) is sleeved on the outer wall of the limiting rod (769); A limiting plate (7611) is mounted on the outer wall of the limiting rod (769); The pin (7612) is installed at the bottom end of the limiting rod (769) and presses the limiting plate (7611) downward under the elastic force of the spring (7610). The limiting rod (769) moves downward to allow the pin (7612) to be inserted into the inner cavity of the positioning blind hole (764).

3. The unmanned medical rescue and transport device with automatic retraction function according to claim 2, characterized in that: The number of the positioning blind holes (764) is at least twelve, and the plurality of positioning blind holes (764) are equidistantly distributed on the outer wall of the turntable (763) along the circumferential direction.

4. The unmanned medical rescue and transport device with automatic retraction function according to claim 3 is characterized in that: The bottom shape of the pin (7612) is conical.

5. The unmanned medical rescue and transport device with automatic retraction function according to claim 4 is characterized in that: The stretching mechanism (8) comprises: A box (81) is fixedly connected to the rear end of the hull (1); A fan (82) is mounted on the upper surface of the box (81), and the fan (82) is electrically connected to the controller (4); A worm motor (83) is mounted on the right side wall of the box (81), and the worm motor (83) is electrically connected to the controller (4); A worm (84), one end of which is mounted on the output end of the worm motor (83), and the other end of which is connected to the left inner wall of the box (81) via a bearing; There are two second rotating shafts (85), which are respectively mounted on the left and right ends of the inner cavity of the box body (81) via bearings and can rotate around their own axes; A worm wheel (86) is mounted on the top of the outer wall of the second rotating shaft (85), and the worm wheel (86) is meshedly connected with the worm (84); A first connecting rod (87), one end of which is mounted on the bottom end of the outer wall of the second rotating shaft (85); A second connecting rod (88), one end of which is connected to the other end of the first connecting rod (87) via a pin; A movable plate (89) connected to the other end of the second connecting rod (88) via a pin; An air bag (810), one side of which is mounted on the front of the movable plate (89) and the other side of which is mounted on the rear end of the box (81); A one-way valve (811) is installed at the front end of the upper surface of the airbag (810). The one-way valve (811) is connected to the fan (82) through an air pipe. The fan (82) is operated to inflate the inner cavity of the airbag (810). The expansion of the airbag (810) can increase the buoyancy.

6. The unmanned medical rescue and transport device with automatic retraction function according to claim 5, characterized in that: The threads on the left and right sides of the outer wall of the worm (84) are positive and negative threads.

7. The unmanned medical rescue and transport device with automatic retraction function according to claim 5, characterized in that: Handles are installed on the upper surfaces of the movable plate (89) and the airbag (810).

8. The unmanned medical rescue and transport device with automatic retraction function according to claim 5, characterized in that: The outer wall of the airbag (810) is wavy in shape.

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