Rapid sick and wounded lifting device and using method thereof

Abstract

The invention discloses a rapid sick and wounded lifting device and a using method thereof. The device comprises two supporting bodies, a top end rotating connecting rod, a bearing plate, a pulley block, a cable rope, a traction wheel and a driving mechanism. The top ends of the two supporting bodies are hinged in a V shape through a top end rotating connecting rod, and the included angle can be adjusted to adapt to different transfer carriage heights. Each supporting body is provided with a pulley block which comprises a movable pulley fixed on the bearing plate and a fixed pulley at the top end of the supporting body, and the bearing plate is in sliding fit with the supporting body through the movable pulley; the cable is wound on the pulley block and is connected with the two bearing plates through the traction wheel to form a mutual counter-weight structure; the driving mechanism drives the traction wheel to rotate, so that one bearing plate ascends, and the other bearing plate descends at the same time. The device is provided with an accessory bearing table, an electric sliding rail, a braking mechanism and a control system, and supports manual and electric operation modes. The device is suitable for rapidly and safely getting on and off the transfer trolley for batch sick and wounded in a disaster site, improves the transfer efficiency, and is convenient to fold and carry.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary device technology, specifically relating to a rapid lifting device for wounded and sick patients and its usage method. Background Technology

[0002] Disasters such as war, earthquakes, and floods often result in large numbers of casualties. Severely injured or ill patients typically lose their ability to move independently, making the process of loading and unloading vehicles a bottleneck in the transfer of large numbers of casualties. Especially when using large trucks or trains with elevated carriages to transport the injured, the process of lifting patients from the ground to the carriage or lowering them from the carriage to the ground consumes significant manpower and time resources, easily leading to low rescue efficiency and potentially causing secondary injuries to the injured during transport.

[0003] In existing technologies, there is considerable research on lifting and lowering auxiliary devices for patients in wards, but fewer on auxiliary devices for large numbers of casualties outdoors, especially for transporting patients in elevated vehicles. Most existing lifting devices employ a single-platform vertical lifting method, such as the lifting device with patent number CN114848334A, which uses a pulley system for vertical lifting. However, each lift can only accommodate one person getting on or off, making it difficult to meet the needs of rapid transport of large numbers of casualties at disaster sites, resulting in low overall efficiency.

[0004] The shortcomings and deficiencies of existing technologies are mainly reflected in the following aspects:

[0005] (1) The efficiency of transporting patients in batches is low. Existing devices usually adopt a single load-bearing platform design, which can only handle one patient at a time and cannot achieve simultaneous lifting of two people, resulting in a prolonged rescue time at the disaster site and a huge consumption of human resources.

[0006] (2) Difficult to adapt to transfer vehicles with different carriage heights. Most existing devices are designed with a fixed height and cannot be adjusted according to the carriage height of different vehicles. They are not suitable for scenarios with large differences in carriage height, such as trucks and trains, and require additional auxiliary facilities, which further increases the complexity of operation and time cost.

[0007] (3) It does not have a two-way lifting function. Existing devices usually only realize one-way lifting (such as only rising or only falling), and cannot simultaneously complete the counterweight operation of one wounded soldier getting on the vehicle and another wounded soldier getting off the vehicle on the same device, resulting in a waste of resources.

[0008] (4) Insufficient folding angle and large space occupation. The existing device is large in size and still occupies a lot of space after folding, which is not convenient for field transport and rapid deployment. It is especially inconvenient to use when space is limited at disaster sites and multiple transfers are required.

[0009] (5) High power requirements. Existing vertical lifting devices need to overcome all gravity to do work, and the pulling force requirement is close to the total weight of the injured or sick person. When operating manually, the operator is prone to fatigue, and the battery life is short in electric mode, making it difficult to adapt to long-term rescue in the field.

[0010] The aforementioned shortcomings limit the practical effectiveness of existing devices in the mass transport of wounded personnel at disaster sites, failing to meet the demands for rapid, efficient, and safe transport. Therefore, there is an urgent need for a rapid lifting device for wounded personnel that enables simultaneous lifting by two people, is height-adjustable, foldable for easy carrying, labor-saving to operate, and adaptable to outdoor environments. Summary of the Invention

[0011] In view of this, the purpose of the present invention is to solve the problems of low efficiency in batch transfer and poor adaptability to height differences in the prior art, and to provide a rapid lifting device for wounded and sick personnel and its usage method.

[0012] To achieve the above objectives, the present invention provides the following technical solution: A rapid lifting device for wounded and sick personnel includes two support bodies, a top rotating connecting rod, a load-bearing plate, a pulley block, a cable, a traction sheave, and a drive mechanism; The top ends of the two support bodies are V-shaped hinged by the top rotating connecting rod, and the included angle can be adjusted to adapt to different transfer car heights. Both of the supports are equipped with the pulley assembly, which includes a movable pulley fixed to the load-bearing plate and a fixed pulley disposed at the top of the support; the load-bearing plate slides in contact with the support via the movable pulley. The traction sheave is positioned above the top rotating connecting rod and connected to the drive mechanism; the cable is wound around the pulley block and connected to the load-bearing plate through the pulley block; the two ends of the cable are connected to the two load-bearing plates through the traction sheave, so that the two load-bearing plates form a structure that counterweights each other; the drive mechanism drives the traction sheave to rotate, thereby driving the cable to wind up and unwind, so that one load-bearing plate rises while the other load-bearing plate falls simultaneously.

[0013] Furthermore, the support body is U-shaped, with a movable pulley guide groove in the middle along the vertical direction and load-bearing plate guide grooves on both sides along the vertical direction; the movable pulley fixed on the load-bearing plate is slidably disposed in the movable pulley guide groove, and guide wheels are provided on both sides of the load-bearing plate. The guide wheels are embedded in the load-bearing plate guide groove, realizing the sliding fit between the load-bearing plate and the support body, and guiding the load-bearing plate to move in a fixed direction.

[0014] Furthermore, the load-bearing plate has a folding structure on the side near the support body, allowing the load-bearing plate to be folded upwards; the back of the load-bearing plate is provided with a support rod and multiple slots arranged along the width direction of the load-bearing plate. The support rod is a V-shaped support rod with a central hinge. One end of the V-shaped support rod is hinged to the load-bearing plate, and the other end is inserted into the slot. By changing the V-shaped support rod to be inserted into different slots, the angle of the load-bearing plate can be adjusted to keep the load-bearing plate horizontal.

[0015] Furthermore, it also includes an accessory support platform, which is located above the top rotating connecting rod and is used to place the traction sheave and drive mechanism; the drive mechanism includes a motor unit, a battery pack, and an operation panel; the traction sheave includes traction sheave A and traction sheave B, which are located at both ends of the traction sheave connecting rod, and the traction sheave connecting rod is provided with gear A, gear B, and a manual insertion hole; gear B is driven and connected to the braking mechanism; gear A is driven and connected to the motor unit; the manual insertion hole is used to manually rotate the traction sheave.

[0016] Furthermore, the accessory support platform is also equipped with an electric slide rail, and the electric motor is mounted on the electric slide rail. The electric motor is driven to engage or disengage with gear A through electric sliding drive. The braking mechanism includes a brake motor and a brake slider. The brake slider is slidably mounted on one side of gear B. The brake motor is connected to the brake slider and drives the brake slider to control the engagement or disengagement of the brake slider with gear B, thereby controlling the traction wheel to stop or rotate freely.

[0017] Furthermore, it also includes a control system, which includes a processor, an operation panel, and a battery pack; the operation panel has multiple operation modules for inputting commands for rising, falling, stopping, and mode selection, each operation module is connected to the processor, and the processor is connected to the electric slide rail, the electric motor assembly, and the brake motor, and controls their response actions according to the commands.

[0018] Furthermore, the device supports both manual and electric operation modes. In the manual operation mode, the traction sheave linkage is rotated by inserting a rocker arm through the manual insertion hole to achieve cable winding and unwinding. In the electric operation mode, the traction sheave linkage is driven by the electric motor to achieve automatic cable winding and unwinding.

[0019] Furthermore, one of the two supports is provided with a balance support rod, and the other is provided with multiple latches. One end of the balance support rod is hinged to the support body, and the other end is detachably connected to the latches. When the balance support rod is connected to the latches, the two supports and the balance support rod form a triangular structure to fix the included angle of the two supports.

[0020] A method of using the rapid lifting device for wounded and sick personnel as described above includes the following steps: Step 1: Adjust the angle between the two supports around the top rotating connecting rod according to the height of the transfer car, so that the overall height of the device adapts to the position of the car, and snap the free end of the balance support rod into the corresponding lock to form a triangular fixing structure to lock the angle of the supports. Step 2: Adjust the V-shaped support rods of the two load-bearing plates and insert them into the slots at different positions on the back of the load-bearing plates. Adjust the angle of the load-bearing plates according to the current angle of the support body so that both load-bearing plates remain horizontal. Step 3: Select manual or electric mode according to the on-site power supply and operation requirements; if manual mode is selected, insert the joystick into the manual socket on the traction sheave connecting rod; if electric mode is selected, start the motor unit through the operation panel and ensure that the motor unit is engaged with gear A through the electric slide rail. Step 4: Move the wounded or sick onto the load-bearing platform; Step 5: Operating the drive mechanism: In manual mode, the traction wheel linkage is rotated by the joystick to drive the traction wheel to rotate; in electric mode, the up or down command is input through the operation panel, and the processor controls the motor to rotate the traction wheel linkage; the rotation of the traction wheel drives the cable to wind up or unwind, thereby causing one side of the load-bearing plate to rise and the other side of the load-bearing plate to fall at the same time. Step 6: When the load-bearing plate reaches the target position, the traction wheel is stopped by the braking mechanism, and the injured person is safely transferred to the carriage or the ground.

[0021] The beneficial effects of this invention are as follows: (1) Significantly improves the efficiency of transporting a large number of wounded and sick personnel. The present invention uses a double-load-bearing plate structure with mutual counterweight and a cable-pulley system connection to achieve one-sided ascent and one-sided descent in one operation, and simultaneously transport two wounded and sick personnel. The efficiency is more than doubled compared with a single-platform device, which greatly shortens the rescue time at disaster sites and reduces manpower input.

[0022] (2) Flexible adaptation to different car heights. In this invention, the support body is V-shaped hinged by the top rotating connecting rod, and the included angle can be adjusted to adapt to various vehicle car heights; the balance support rod and the multi-position locking buckle form a triangular fixing structure to ensure stability and reliability after adjustment, without the need for additional auxiliary facilities, thereby improving the speed of on-site deployment and versatility.

[0023] (3) Achieve efficient bidirectional lifting function. The counterweight design of this invention balances the gravity on both sides, and the drive mechanism only needs to overcome friction and a small amount of unbalanced force, which significantly reduces the power demand; the inclined sliding cooperation further reduces the pulling force, extends the battery life in electric mode, and greatly reduces the operating force in manual mode, thus reducing the fatigue of rescue personnel.

[0024] (4) Excellent foldability and portability. In this invention, the support body is folded by a V-shaped hinge, and the load-bearing plate is folded upward. After folding, it occupies little space, making it easy to carry, store and quickly transfer in the field, meeting the needs of multiple deployments at disaster sites.

[0025] (5) Flexible and reliable operation mode. This invention supports manual / electric dual-mode switching. The manual mode is suitable for environments without power supply, while the electric mode achieves precise control through the operation panel and processor. The electric slide rail achieves engagement / disengagement, and the brake slider provides a reliable stopping function to prevent accidental slippage and ensure the safe transfer of the wounded and sick.

[0026] (6) Improve safety during transport. In this invention, the load-bearing plate is kept level by V-shaped support rods and multiple slots to reduce swaying and tilting during lifting; the guide slot guides stable movement; the braking mechanism and control system provide multiple protections to reduce the risk of secondary injury.

[0027] (7) Compact structure and easy maintenance. The present invention adopts a mechanical pulley block, a counterweight cable and a small number of electric components. The structure is simple and reliable, the cost is low and it is suitable for mass production and use at disaster sites.

[0028] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is an overall schematic diagram of the rapid lifting device for wounded and sick personnel in this invention.

[0030] Figure 2 A schematic diagram of the operating state of the two load-bearing plates in this invention.

[0031] Figure 3 This is a schematic diagram of the support body in this invention.

[0032] Figure 4 This is a force analysis diagram of the load-bearing plate in this invention.

[0033] Figure 5 This is a front view of the load-bearing plate in this invention.

[0034] Figure 6 This is a schematic diagram of the back of the load-bearing plate in this invention.

[0035] Figure 7This is a side view of the load-bearing plate in this invention.

[0036] Figure 8 This is a schematic diagram of the supporting platform of the accessory in this invention.

[0037] Figure 9 This is a connection diagram of the control system in this invention.

[0038] Figure 10 This is a schematic diagram illustrating the application of the rapid lifting device for wounded and sick personnel in this invention.

[0039] Figure 11 This is a flowchart illustrating the usage of the rapid lifting device for wounded and sick personnel in this invention.

[0040] Reference numerals: 1-First support body; 2-Second support body; 3-Top rotating connecting rod; 4-Bearing plate A; 5-Bearing plate B; 6-Moving pulley; 7-Fixed pulley; 8-Traction wheel A; 9-Traction wheel B; 10-Cable; 11-Moving pulley guide groove; 12-Accessory support platform; 13-V-shaped support rod; 14-Balance support rod; 15-Lock; 16-Drive mechanism; 17-Bearing plate guide groove; 18-Gear A; 19-Gear B; 20-Traction wheel connecting rod; 21-Electric slide rail; 22-Motor unit; 23-Brake motor; 24-Brake slider. Detailed Implementation

[0041] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0043] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0044] Example 1 like Figures 1-10 As shown, a rapid lifting device for wounded and sick personnel includes a first support body 1, a second support body 2, a top rotating connecting rod 3, a load-bearing plate A4, a load-bearing plate B5, a movable pulley 6, a fixed pulley 7, a traction wheel A8, a traction wheel B9, a cable 10, a movable pulley guide groove 11, an accessory load-bearing platform 12, a V-shaped support rod 13, a balance support rod 14, a lock 15, a drive mechanism 16, a load-bearing plate guide groove 17, a gear A18, a gear B19, a traction wheel connecting rod 20, an electric slide rail 21, a motor assembly 22, a brake motor 23, and a brake slider 24.

[0045] The top ends of the first support body 1 and the second support body 2 are V-shaped hinged by a top rotating connecting rod 3, forming an adjustable angle structure. Adjusting the angle between the two supports allows for adaptation to different transfer car heights. Both supports are U-shaped, with a vertical pulley guide groove 11 in the middle and load-bearing plate guide grooves 17 on both sides to guide the stable sliding of the load-bearing plates. Load-bearing plates A4 and B5 are respectively located on the outer sides of the first support body 1 and the second support body 2. Movable pulleys 6 are fixed to the load-bearing plates and slidably positioned in the pulley guide grooves 11. Guide wheels on both sides of the load-bearing plates are embedded in the load-bearing plate guide grooves 17, achieving a sliding fit between the load-bearing plates and the supports, and ensuring that the load-bearing plates move in a fixed direction.

[0046] Cable 10 is wound around a pulley block, which includes a movable pulley 6 fixed to the load-bearing plate and a fixed pulley 7 located at the top of the support. Cable 10 is connected to the two load-bearing plates through the pulley block. The two ends of cable 10 are connected to load-bearing plates A4 and B5 through traction sheaves A8 and B9, forming a counterweight structure. Traction sheaves A8 and B9 are located at both ends of traction sheave connecting rod 20, which is equipped with gears A18 and B19 and a manual insertion hole. An accessory support platform 12 is located above the top rotating connecting rod 3 and is used to place components such as the traction sheave and drive mechanism 16. The drive mechanism 16 includes a motor assembly 22, a battery pack, and an operation panel. The motor assembly 22 is mounted on the electric slide rail 21. The motor assembly 22 is engaged or disengaged from the gear A18 via electric sliding drive. The gear B19 is connected to the braking mechanism, which includes a brake motor 23 and a brake slider 24. The brake motor 23 drives the brake slider 24 to slide and control the brake slider 24 to engage or disengage from the gear B19, thereby controlling the traction sheave to stop or rotate freely.

[0047] One of the two supports is equipped with a balance support rod 14, and the other is equipped with multiple latches 15. One end of the balance support rod 14 is hinged to the support, and the other end is detachably connected to the latches 15, forming a triangular structure to fix the included angle of the support when connected. The load-bearing plate has a folding structure on the side near the support, which can be folded upwards. The back of the load-bearing plate is equipped with a V-shaped support rod 13 and multiple slots along the width of the load-bearing plate. The V-shaped support rod 13 is hinged in the middle, with one end hinged to the load-bearing plate and the other end inserted into the slot. By changing the position of the V-shaped support rod 13 in different slots, the angle of the load-bearing plate can be adjusted according to the included angle of the support, so that the load-bearing plate remains horizontal.

[0048] The device supports both manual and electric operation modes. In manual mode, the traction sheave linkage 20 is rotated by inserting a rocker arm through the manual insertion hole, enabling the cable 10 to be wound and unwound. In electric mode, the traction sheave linkage 20 is driven by the motor unit 22, enabling the cable to be automatically wound and unwound. The two supports form an inclined plane structure, and the load-bearing plate slides along the inclined plane. When the angle between the support and the ground is θ, the tension force F1 = mg sin(θ) pulling the load-bearing plate by the cable significantly reduces the required lifting driving force.

[0049] When transferring a large number of injured or sick people at a disaster site, first adjust the angle of the support body according to the height of the carriage and fix it with the balance support rod 14 and the lock 15; adjust the V-shaped support rod 13 to be inserted into different slots to keep the load-bearing plate A4 and the load-bearing plate B5 horizontal; lift the injured or sick people onto the load-bearing plate respectively; operate the drive mechanism 16 to drive the traction wheel to rotate, and the cable 10 drives one side of the load-bearing plate to rise and the other side to fall, so as to complete the transfer of two people at the same time; after reaching the position, the brake motor 23 drives the brake slider 24 to engage with the gear B19 to stop the traction wheel and ensure safe transfer.

[0050] Example 2 This embodiment is a variation of the load-bearing plate clamping structure based on the rapid lifting device for wounded and sick personnel in Embodiment 1. This variation uses a V-shaped support rod clamping device with a different slot arrangement, as detailed below: The number of slots along the width of the back of the load-bearing plate has been increased to multiple sets. The slot positions correspond to different angle ranges of the supports. For example, one set of slots corresponds to a small angle (the support is nearly vertical), and another set corresponds to a large angle (the support is more inclined). The V-shaped support rod 13 still adopts a central hinge structure, with one end fixedly hinged to the load-bearing plate and the other end able to be engaged in different sets of slots. By selecting different sets of slots, more precise adjustment of the load-bearing plate angle can be achieved, ensuring that the load-bearing plate remains horizontal under various support angles. This clamping structure optimizes the slot distribution density and improves adjustment flexibility based on Embodiment 1, but still relies on the hinge and engagement method of the V-shaped support rod 13 to ensure that the load-bearing plate does not tilt or wobble.

[0051] In use, first adjust and fix the included angle of the support body; according to the current included angle of the support body, select the corresponding slot group, and insert the V-shaped support rod 13 into the corresponding slot to achieve a horizontal load-bearing plate; subsequent operations are the same as in Example 1, including selecting manual or electric mode, lifting and moving the wounded, driving the traction wheel to achieve counterweight lifting and lowering, braking and stopping, and transferring the wounded. This modified clamping device further improves the adaptability to different car heights, reduces adjustment time, and maintains the original inclined plane labor-saving characteristics (F1=mgsin(θ)) and the efficiency of counterweight double-person transfer.

[0052] Example 3 Please see Figure 11 This embodiment describes the method of using the rapid lifting device for wounded and sick personnel based on Embodiment 1, specifically including the following steps: Step 1: According to the height of the transfer car, adjust the included angle of the first support body 1 and the second support body 2 around the top rotating connecting rod 3 so that the overall height of the device adapts to the position of the car, and snap the free end of the balance support rod 14 into the corresponding lock 15 to form a triangular fixed structure to lock the included angle of the support body; Step 2: Adjust the V-shaped support rods 13 of the load-bearing plate A4 and the load-bearing plate B5. Fix one end of the V-shaped support rod 13 to the load-bearing plate and insert the other end into the slots at different positions on the back of the load-bearing plate. Adjust the angle of the load-bearing plate according to the current angle of the support body so that both load-bearing plates are kept horizontal. Step 3: Select manual mode or electric mode according to the on-site power supply and operation requirements; if manual mode is selected, insert the rocker arm into the manual insertion hole on the traction wheel connecting rod 20; if electric mode is selected, start the motor unit 22 through the operation panel and ensure that the motor unit 22 is engaged with the gear A18 through the electric slide rail 21. Step 4: Move the wounded and sick onto load-bearing plate A4 and load-bearing plate B5 respectively; Step 5: Operation of drive mechanism 16: In manual mode, the traction wheel linkage 20 is rotated by the rocker arm to drive the traction wheel to rotate; in electric mode, the up or down command is input through the operation panel, and the processor controls the motor group 22 to rotate the traction wheel linkage 20; the rotation of the traction wheel drives the cable 10 to wind up or unwind, thereby causing one side of the load-bearing plate to rise and the other side of the load-bearing plate to fall at the same time, so that two people can transfer at the same time. Step 6: When the load-bearing plate reaches the target position, the brake motor 23 drives the brake slider 24 to engage with the gear B19, causing the traction wheel to stop rotating and safely transferring the wounded to the carriage or the ground; repeat the above steps until the mass transfer of wounded is completed.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A rapid evacuation device for a patient, comprising: It comprises two support bodies, a top rotary connecting rod, a bearing plate, a pulley block, a cable, a traction wheel and a driving mechanism; The top ends of the two support bodies are hinged in a V shape through the top rotary connecting rod, and the included angle is adjusted to adapt to different heights of the transfer carriages; The pulley block is arranged on the bearing plate and the support body, and the bearing plate is slidably connected with the support body through the movable pulley. The traction wheel is arranged above the top rotary connecting rod and connected with the driving mechanism, the cable is wound on the pulley block and connected with the bearing plate through the pulley block, the two ends of the cable are connected with the two bearing plates through the traction wheel, the two bearing plates form a counterweight structure, and the driving mechanism drives the traction wheel to rotate, so that the cable is wound or unwound, one bearing plate is lifted, and the other bearing plate is lowered at the same time.

2. The rapid casualty lifting device of claim 1, wherein, The support body is in a "concave" shape, the middle part is provided with a movable pulley guide groove in the vertical direction, and the two sides are provided with bearing plate guide grooves in the vertical direction; the movable pulley fixed on the bearing plate is slidably arranged in the movable pulley guide groove, and the two sides of the bearing plate are provided with guide wheels which are embedded in the bearing plate guide grooves, so as to realize the sliding connection between the bearing plate and the support body and guide the bearing plate to move in a fixed direction.

3. The rapid casualty lifting device of claim 1, wherein, The side of the bearing plate close to the support body is provided with a folding structure, so that the bearing plate can be folded upward; the back of the bearing plate is provided with a support rod and a plurality of clamping grooves arranged in the width direction of the bearing plate, the support rod is a V-shaped support rod hinged in the middle, one end of the V-shaped support rod is hinged with the bearing plate, and the other end is clamped into the clamping groove, the angle of the bearing plate is adjusted by clamping the V-shaped support rod into different clamping grooves, so that the bearing plate remains horizontal.

4. The rapid casualty lifting device of claim 1, wherein, The accessory bearing table is arranged above the top rotary connecting rod and used for placing the traction wheel and the driving mechanism; the driving mechanism comprises a motor set, a battery set and an operation panel; the traction wheel comprises a traction wheel A and a traction wheel B, the traction wheel A and the traction wheel B are arranged at the two ends of a traction wheel connecting rod, the traction wheel connecting rod is provided with a gear A, a gear B and a manual jack; the gear B is in transmission connection with a brake mechanism; the gear A is in transmission connection with the motor set; the manual jack is used for manually rotating the traction wheel.

5. The rapid casualty lifting device of claim 4, wherein, The motor set is arranged on the electric sliding rail, the motor set is combined with or separated from the gear A through electric sliding driving; the brake mechanism comprises a brake motor and a brake sliding block, the brake sliding block is slidably arranged on one side of the gear B, the brake motor is connected with the brake sliding block, the brake sliding block is driven to slide to control the brake sliding block to be combined with or separated from the gear B, so as to control the traction wheel to stop or rotate freely.

6. The rapid casualty lifting device of claim 5, wherein, Also include a control system, the control system includes a processor, an operation panel, a battery pack; a plurality of operation modules on the operation panel for inputting ascending, descending, stopping and mode selection instructions, each operation module is connected with the processor, the processor is connected with the electric sliding rail, the motor set, the brake motor, and controls the response action according to the instruction.

7. The rapid casualty lifting device of claim 6, wherein, The device supports manual operation mode and electric operation mode; in the manual operation mode, the cable reel is wound and unwound by rotating the traction wheel connecting rod through the rocker inserted into the manual jack; in the electric operation mode, the cable is automatically wound and unwound by driving the traction wheel connecting rod through the motor set.

8. The rapid casualty lifting device of claim 1, wherein, One of the two support bodies is provided with a balance support rod, and the other is provided with a plurality of locks, one end of the balance support rod is hinged to the support body, and the other end is detachably connected to the lock, when the balance support rod is connected to the lock, the two support bodies and the balance support rod form a triangular structure to fix the included angle of the two support bodies.

9. A method of using a rapid casualty lift as claimed in any one of claims 1 to 8, characterised in that, The steps include: Step 1: According to the height of the transfer compartment, adjust the included angle of the two support bodies around the top end of the rotating connecting rod, so that the overall height of the device adapts to the position of the compartment, and the free end of the balance support rod is inserted into the corresponding lock to form a triangular fixed structure to lock the included angle of the support body; Step 2: Adjust the V-shaped support rod of the two load bearing plates, insert it into the clamping groove on the back of the load bearing plate, and adjust the angle of the load bearing plate according to the current included angle of the support body, so that both load bearing plates remain horizontal; Step 3: According to the power supply situation and operation requirements on site, select manual mode or electric mode; if manual mode is selected, insert the rocker into the manual jack on the traction wheel connecting rod; if electric mode is selected, start the motor set through the operation panel, and ensure that the motor set engages with gear A through the electric sliding rail; Step 4: Lift the wounded or sick person onto the load bearing plate; Step 5: Operate the drive mechanism: for manual mode, rotate the traction wheel connecting rod by rotating the rocker; for electric mode, input the ascending or descending instruction through the operation panel, and rotate the traction wheel connecting rod by the motor set controlled by the processor; the traction wheel rotates to wind or unwind the cable, so that one side of the load bearing plate rises and the other side of the load bearing plate descends at the same time; Step 6: When the load bearing plate reaches the target position, stop the traction wheel from rotating by the brake mechanism, and safely transfer the wounded or sick person to the compartment or the ground.

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