Stretcher for transferring sick and wounded on battlefield

Abstract

The invention discloses a stretcher for transferring the sick and wounded on a battlefield. The problem that an existing battlefield cart is inconvenient to use is effectively solved. Comprising a rectangular containing box with an upward opening, front-back axial transmission shafts are rotationally connected to the left side and the right side of the lower side wall of the containing box correspondingly, the front ends and the rear ends of the transmission shafts penetrate through the containing box correspondingly and are fixedly provided with swing rods, the two swing rods on the right side are located between the two swing rods on the left side, and the swing rods on the left side and the right side are distributed in a V shape; the lower end of the swing rod is rotationally connected with an anti-skid tire through front-back axial rotating columns, the multiple rotating columns are coaxially arranged, incomplete gears are coaxially and fixedly connected to the transmission shaft, the two incomplete gears are in bilateral symmetry, a rectangular groove located below the gears is formed in the lower side wall of the containing box, and a rectangular plate capable of sliding front and back is arranged in the rectangular groove. A vertically through guide groove is formed in the rectangular plate; the device is simple in structure, convenient to operate, novel in conception and high in usability.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary devices, and particularly to a stretcher trolley for transferring the wounded and sick on the battlefield. Background Art

[0002] In the battlefield environment, the efficient transportation of the wounded and sick and military supplies is the core link of the logistics support system, and its performance directly affects the transportation efficiency of the wounded and the success rate of treatment. At present, the commonly used stretcher trolleys on the battlefield are mainly divided into two types: two-wheel and four-wheel. The traditional two-wheel stretcher trolley has certain passing advantages in complex terrains due to its compact structure, but its center-of-gravity stability is insufficient, which is likely to cause secondary injuries. Although the four-wheel trolley has better stability, it is difficult to meet the requirements of the field environment due to problems such as large turning radius and poor terrain adaptability. Both of these two traditional configurations have the defect of fixed functions and cannot perform intelligent conversion of the wheel system form according to the actual battlefield needs. Moreover, for the terminal link of transporting the wounded and sick, the height of the military truck carriage floor from the ground is generally relatively high, and the current operation specifications require at least four stretcher bearers to cooperate to complete the lifting and loading of the wounded. This operation mode has obvious defects: high manpower consumption leads to low rescue efficiency, improper personnel cooperation is likely to cause the risk of the wounded falling, multiple lifting and vibration exacerbate the pain of the wounded, and the lack of a buffer device in the traditional stretcher results in insufficient transfer comfort. For the cargo transportation scenario, although the two-wheel trolley can pass through narrow terrains, its open-frame lacks a cargo box structure, and the cargo needs to be fixed by ropes or straps, which is likely to slip or fall on bumpy roads. Although the four-wheel trolley is equipped with a cargo hopper, its fixed chassis has a low ground clearance, and manpower is required to lift heavy materials. Moreover, the wheelbase and steering mechanism cannot adapt to complex terrains such as trenches and gravel, and wheel jamming frequently occurs. The loading of goods requires the cooperation of multiple soldiers, which is not only inefficient but also likely to expose the target under the threat of enemy fire, increasing the risk of casualties. It can be seen that the existing battlefield transportation equipment has systematic shortcomings in the adaptability of carrying people and goods together, terrain passability, and loading and unloading efficiency. Summary of the Invention

[0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a stretcher trolley for transferring the wounded and sick on the battlefield, which effectively solves the problem of inconvenient use of the existing battlefield trolleys.

[0004] The technical solution it adopts is that the present invention includes a placement box which is rectangular and has an upward opening. On the left and right sides of the lower side wall of the placement box, there are respectively rotatably connected with drive shafts in the front-back axial direction. The front and rear ends of the drive shafts respectively penetrate through the placement box and are fixed with swing rods. The two swing rods on the right side are located between the two swing rods on the left side. The swing rods on the left and right sides are distributed in a V shape. The lower ends of the swing rods are rotatably connected with anti-slip tires through rotating columns in the front-back axial direction. A plurality of rotating columns are coaxially arranged. On the drive shafts, there are coaxially fixedly connected with incomplete gears. The two incomplete gears are symmetric left and right. On the lower side wall of the placement box, there is a rectangular groove located below the gears. Inside the rectangular groove, there is a rectangular plate that can slide back and forth. On the rectangular plate, there are through guide grooves in the up-down direction. The two guide grooves are distributed in a figure-eight shape. On the left and right sides of the lower side wall of the placement box, there are respectively opened with chutes whose lower ends are communicated with the rectangular groove. Inside the chutes, there are slidably connected with racks. The two racks are respectively meshed with the incomplete gears on their corresponding sides and their lower ends are fixed with guide columns inserted into the guide grooves on their corresponding sides. Inside the placement box, there are two pads arranged up and down. The lower pad can move up and down. On the front and rear sides of the pad, there are respectively opened with push grooves whose lower ends are communicated with the outside. The opposite ends of the front and rear push grooves are communicated with the outside. On the pad, there is an arc-shaped notch. The upper side of the notch is communicated with the outside and the lower side is communicated with the push groove. On the front and rear sides of the placement box, there are respectively rotatably connected with turntables. On the opposite surfaces of the two turntables, there are respectively eccentrically fixed with push columns. The push columns are inserted into the push grooves inside the upper pad and can move inside the notch. On the front and rear sides of the placement box, there are respectively opened with guide rail grooves. The left and right ends of the guide rail grooves are respectively communicated with the outside. The guide rail groove is composed of two flat grooves and an arc-shaped groove. The arc-shaped groove is located between the two flat grooves and is communicated with the two flat grooves. The upper end of the arc-shaped groove is communicated with the outside. On the front and rear side walls of the placement box, there are respectively opened with positioning grooves. The two positioning grooves are arranged left and right and their upper ends are communicated with the flat grooves on their corresponding sides. On the front and rear ends of the two pads, there are respectively rotatably connected with two guide rail wheels located inside the positioning grooves on their corresponding sides. The guide rail wheels can be inserted into the guide rail grooves and can move inside the guide rail grooves.

[0005] The present invention is provided with a placement box, a backing plate, a swing rod, anti-slip tires, a transmission shaft, an incomplete gear, a rack, a rectangular plate, a transmission screw, a motor, a sleeve, a rotating shaft, a transmission gear, an idle gear, a connecting gear, a guide groove, a guide post, a push groove, a push post, a guide rail groove and a guide rail wheel, so that when used on the battlefield, the state of the wheels can be intelligently switched. Through the coupling of the incomplete gear and rack linkage mechanism and the elastic sheet damping system, the mobility of the two-wheel mode and the stability of the four-wheel mode are realized and quickly switched, solving the problem that the traditional trolley cannot have both passing performance and stability at the same time. At the same time, efficient mixed loading and unloading of people and goods are provided. Through the linkage of the push post, the notch mechanism and the guide rail groove, the switching loading of the upper and lower backing plates is realized. One single operation can continuously transport two layers of goods or wounded. At the same time, through hydraulic lifting docking, the manpower requirement is reduced, and the risk of falling during the lifting process is eliminated. The swing rod contacts the elastic sheet to form a pre-tightening force, which can absorb impact energy. When there is a violent bump, the swing rod squeezes the notch of the fixed block to generate frictional damping, further reducing the vibration transmission rate. And the swing rod can be disengaged and locked through the incomplete gear to prevent accidental folding of the swing rod and prevent wheel state failure during travel. Through the cooperation of the inclined surface of the stop block and the spring sheet, it is ensured that the backing plate is automatically locked after unfolding, avoiding the risk of slipping. The backing plate can carry personnel or materials, realizing the dual use of one vehicle and reducing equipment redundancy. When specifically used, it can realize wheel state adaptive switching, double backing plate alternating lifting, and elastic damping, solving the problems of low efficiency, single function and insufficient safety of traditional battlefield transfer equipment, and achieving breakthroughs in the convenience of individual operation, multi-task adaptability and survivability in complex environments; This structure is simple, easy to operate, novel in concept and highly practical. Description of the Drawings

[0006] Figure 1 is an axonometric view of the present invention.

[0007] Figure 2 is an axonometric view of the present invention after the swing rod swings.

[0008] Figure 3 is a partial cross-sectional front axonometric view of the present invention.

[0009] Figure 4 is a partial cross-sectional front axonometric view of the present invention.

[0010] Figure 5 is a full cross-sectional front axonometric view of the present invention.

[0011] Figure 6 is a partial cross-sectional top view of the present invention.

[0012] Figure 7 is a partial cross-sectional top view of the present invention.

[0013] Figure 8 is a partial cross-sectional top view of the present invention.

[0014] Figure 9 It is a partially cutaway right axonometric view of the present invention.

[0015] Figure 10 It is a partially cutaway right view of the present invention.

[0016] Figure 11 It is a parts diagram of the incomplete gear and rack after the swing arm of the present invention swings.

[0017] Figure 12 The present invention Figure 9 A is an enlarged view of the middle image. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0019] Depend on Figures 1 to 12 The invention discloses a storage box 1 which is rectangular and opened upwards. The left and right sides of the lower side wall of the storage box 1 are respectively connected to the front and rear axial transmission shafts 2. The front and rear ends of the transmission shaft 2 respectively pass through the storage box 1 and are fixed with swing rods 3. The two swing rods 3 on the right are located between the two swing rods 3 on the left. The swing rods 3 on the left and right are distributed in a V shape. The lower ends of the swing rods 3 are connected to the anti-skid tires through the rotating columns 4 on the front and rear axials. The multiple rotating columns 4 are coaxially arranged. The transmission shaft 2 is coaxially fixedly connected with an incomplete gear 5. The two incomplete gears 5 are fixedly connected to the transmission shaft 2. The wheel 5 is symmetrical, a rectangular groove 6 is provided on the lower side wall of the placement box 1 and is located below the gear, a rectangular plate 7 that can slide forward and backward is provided in the rectangular groove 6, a guide groove 8 that passes through the upper and lower sides is provided on the rectangular plate 7, and the two guide grooves 8 are distributed in an eight-shaped shape, and slide grooves 9 are provided on the left and right sides of the lower side wall of the placement box 1, and the lower ends of the slide grooves 9 are connected to the rectangular groove 6, and racks 10 are slidably connected in the slide grooves 9, and the two racks 10 are respectively meshed with the incomplete gears 5 on the corresponding sides thereof and the lower ends are fixed with guide posts 11 inserted into the guide grooves 8 on the corresponding sides thereof; The described placement box 1 is provided with two pads 12 arranged vertically. The lower pad 12 can move up and down. On the front and rear sides of the pad 12, push grooves 13 with their lower ends communicating with the outside are respectively formed. The opposite ends of the push grooves 13 on the front and rear sides communicate with the outside. An arc-shaped notch 14 is formed on the pad 12. The upper side of the notch 14 communicates with the outside and the lower side communicates with the push groove 13. On the front and rear sides of the placement box 1, turntables 15 are respectively rotatably connected. On the opposite surfaces of the two turntables 15, push columns 16 are respectively eccentrically fixed. The push columns 16 are inserted into the push grooves 13 in the upper pad 12 and can move in the notch 14. On the front and rear sides of the placement box 1, guide rail grooves are respectively formed. The left and right ends of the guide rail grooves respectively communicate with the outside. The guide rail groove is composed of two flat grooves 17 and an arc-shaped groove 18. The arc-shaped groove 18 is located between the two flat grooves 17 and communicates with the two flat grooves 17. The upper end of the arc-shaped groove 18 communicates with the outside. On the front and rear side walls of the placement box 1, positioning grooves 19 are respectively formed. The two positioning grooves 19 are arranged left and right and their upper ends communicate with the corresponding flat grooves 17 on their respective sides. On the front and rear ends of the two pads 12, two guide rail wheels 20 located in the corresponding positioning grooves 19 on their respective sides are respectively rotatably connected. The guide rail wheels 20 can be inserted into the guide rail groove and can move in the guide rail groove.

[0020] For the convenience of lifting and using this device, hydraulic devices 21 are respectively arranged at the left and right ends of the placement box 1, and a handrail 22 is fixed at the left end of the placement box 1.

[0021] For the convenience of the rotation of the turntable 15 and the movement of the rectangular plate 7, a sleeve 23 in the front-back axial direction is arranged on the lower side wall of the placement box 1. The sleeve 23 can rotate and can slide back and forth. The turntable 15 can rotate with the rotation of the sleeve 23. A transmission screw rod 24 in the front-back axial direction is rotatably connected to the lower side wall of the placement box 1. The transmission screw rod 24 is threadedly connected to the rectangular plate 7 and can rotate with the rotation of the sleeve 23.

[0022] To enable the turntable 15 and the transmission screw rod 24 to rotate with the sleeve 23, transmission gears 25 are respectively coaxially fixed at the left and right ends of the sleeve 23. A plurality of tooth grooves 26 evenly distributed along the circumferential direction of the turntable 15 are formed on the outer side of the turntable 15. Idler gears 27 located between the turntable 15 and the transmission gear 25 are respectively rotatably connected to the front and rear sides of the lower side wall of the placement box 1. The upper side of the idler gear 27 meshes with the corresponding tooth groove 26 on its side and the lower side can mesh with the transmission gear 25. A connecting gear 28 located behind the transmission gear 25 is fixed at the left end of the transmission screw rod 24. The upper side of the connecting gear 28 can mesh with the transmission gear 25.

[0023] To facilitate the control of the rotation and sliding of the sleeve 23, a positioning block 29 is fixed at the front end of the placement box 1. A motor is fixed inside the positioning block 29. The output end of the motor is fixed with a rotating shaft 30 coaxial with the sleeve 23. The rotating shaft 30 is slidably connected to the sleeve 23 through a key and a keyway. The rear end of the sleeve 23 is rotatably connected to a connecting block 31. A moving screw 32 is fixed at the rear end of the connecting block 31. The rear end of the moving screw 32 penetrates through the placement box 1 and extends out. Yielding grooves 33 are respectively formed on the front and rear sides of the placement box 1. The transmission gear 25 is located in the yielding groove 33.

[0024] To facilitate the increase of the damping effect, two fixed blocks 34 opposite to each other left and right are respectively fixed on the front and rear sides of the placement box 1. An arc-shaped notch is formed on the fixed block 34. An arc-shaped elastic sheet 35 is fixed in the notch. The elastic sheet 35 can contact the side wall of the swinging rod 3 on its corresponding side.

[0025] To control the movement of the guide wheel 20 in the positioning groove 19 and the guide groove, two inverted L-shaped stoppers 36 opposite to each other left and right are respectively slidably connected to the front and rear side walls of the placement box 1. The stopper 36 can block the connection between the positioning groove 19 and the flat groove 17 on its corresponding side. The left end face of the stopper 36 is an inclined surface. The stepped surface of the stopper 36 is in contact with the placement box 1 through a spring piece 37. The opposite ends of the stoppers 36 on the left and right sides penetrate through the placement box 1 and extend out.

[0026] To limit the position of the guide wheel 20 after it moves into the guide groove, limiting screws 38 are respectively threadedly connected to the front and rear sides of the placement box 1. The limiting screw 38 is inserted into the guide groove on its corresponding side and can contact the guide wheel 20 on its corresponding side.

[0027] To enable the lower cushion plate 12 to be located at its corresponding position after the upper cushion plate 12 moves, four upward-opening pressing grooves 39 are formed on the lower side wall of the placement box 1. The bottom surface of the pressing groove 39 is connected to a support column 41 through a compression spring 40. The upper end of the support column 41 contacts the cushion plate 12. Inverted U-shaped pulling handles 42 are respectively slidably connected to the left and right ends of the cushion plate 12. The pulling handle 42 can extend out of the cushion plate 12.

[0028] When the present invention is in use, the initial state is set, and the device is default in the two-wheel folding and storage mode: the four anti-slip tires are folded into coaxial double wheels through the V-shaped intersection of the swing rod 3, the cushion plate 12 is stacked in the placement box 1, and the hydraulic device 21 is in a contracted state. During specific use, goods can be placed in the placement box 1. If it is necessary to switch to the four-wheel mode (complex terrain), only need to rotate the moving screw 32. The moving screw 32 drives the sleeve 23 to slide backward along the key and keyway of the rotating shaft 30, and makes the driving gear 25 at the left end mesh with the connecting gear 28. At this time, the two driving gears 25 and the idler gear 27 are not meshed. Start the motor, the motor drives the driving gear 25 at the left end of the sleeve 23 to rotate through the rotating shaft 30, drives the connecting gear 28 at the left end of the driving screw 24 to rotate, and drives the driving screw 24 to rotate; Through the above process, the sleeve 23 is rotated to drive the driving screw 24 to rotate counterclockwise. The rectangular plate 7 connected by threads moves backward, and the eight-shaped guide groove 8 on it pushes the guide columns 11 on the left and right sides to move away from each other. The guide columns 11 drive the rack 10 to move outward. The rack 10 meshes with the incomplete gear 5, driving the drive shafts 2 on the left and right sides to rotate in the reverse direction, and the swing rod 3 is unfolded to the four-corner support position, and the anti-slip tires are distributed in a rectangle; At the same time, when the swing rod 3 is unfolded, the side wall contacts the arc-shaped elastic piece 35 on the fixed block 34, and the elastic piece 35 is compressed and deformed to form a pre-tightening force to achieve passive shock absorption; after the incomplete gear 5 is disengaged from the rack 10, and due to the self-locking property of the threaded connection, when the incomplete gear 5 is reset, the teeth contact the rack 10, restricting the reverse rotation of the incomplete gear 5. And because the tires on the left and right sides are distributed in an eight-shaped after swinging, the swing rod 3 will only squeeze the elastic piece 35 and will not shrink to the initial state. At the same time, the toothless part of the incomplete gear 5 does not restrict the rotation of the incomplete gear 5, so that the drive shaft 2 can swing outward and squeeze the elastic piece 35 to achieve a shock absorption effect; If it is necessary to switch back to the two-wheel mode for quick maneuverability, only need to reverse the motor to drive the sleeve 23 to drive the driving gear 25 at its left end to rotate in the reverse direction. The driving gear 25 drives the connecting gear 28 at the left end of the driving screw 24 to rotate, and drives the driving screw 24 to rotate. The driving screw 24 rotates clockwise, the rectangular plate 7 moves forward to make the guide columns 11 move toward each other, the rack 10 pulls back to drive the incomplete gear 5 to rotate in the reverse direction, the swing rod 3 is folded into a V-shaped intersection state, the anti-slip tires are folded into coaxial double wheels, and the device enters a low center-of-gravity and compact form; If it is necessary to lift and load or transfer patients, only need to start the hydraulic device 21. After the hydraulic lifting placement box 1 is docked with the carriage and the hydraulic cylinder is locked, the first-layer cushion plate 12 is loaded with the wounded or goods. Only need to rotate the moving screw 32, so that the moving screw 32 drives the sleeve 23 to move leftward through the connecting block 31. At this time, the connecting gear 28 is disengaged from the driving gear 25, and at the same time, the two driving gears 25 are engaged with the idle gears 27 on their corresponding sides. Start the motor, the motor drives the rotating shaft 30 and the sleeve 23 to rotate, the sleeve 23 drives the driving gear 25 and the idle gear 27 to rotate, and the idle gear 27 drives the turntable 15 to rotate counterclockwise through the tooth groove 26. The eccentric push column 16 of the turntable 15 moves along the push groove 13 of the upper cushion plate 12, and pushes the cushion plate 12 to move downward in the carriage; The guide wheel 20 moves upward along the positioning groove 19. The guide wheel 20 presses the inclined surface of the stop block 36, and the spring piece 37 is compressed to make the stop block 36 move backward temporarily. The guide wheel 20 is reset by the rear stop block 36 under the action of the spring, covering the entrance of the positioning groove 19 to prevent the cushion plate 12 from falling back. At this time, the turntable 15 continues to rotate, driving the push column 16 to be removed from the lower side of the push groove 13. And because there is no blockage of the upper cushion plate 12, the multiple compression springs 40 on the lower side push the support column 41 to support the lowermost cushion plate 12, so that the turntable 15 drives the push column 16 to move into the lower push groove 13 through the notch 14. The uppermost cushion plate 12 supports the goods or patients in the placement box 1 to be lifted out. If vehicle handling is not required, only need to lift out the goods or personnel. At this time, it can continue to move, or carry the items. If it is necessary to remove the cushion plate 12 from the placement box 1, only need to rotate the limiting screw 38 so that the limiting screw 38 does not block the movement of the guide wheel 20. The operator pulls out the inverted U-shaped pull handles 42 on both sides of the cushion plate 12, extends the cushion plate 12 completely into the carriage, and then manually pulls the pull handle 42 to move the cushion plate 12. During this process, the guide wheel 20 slides along the flat groove 17 of the guide groove. When the push column 16 moves to the end of the push groove 13, the guide wheel 20 enters the upper end of the arc groove 18, and then moves through the guide wheel 20 along the guide groove, so that a single person can gently pull the cushion plate 12 into the carriage; Heavy materials can be directly pushed into the cushion plate 12. In the four-wheel mode, the elastic piece 35 buffers the vibration to avoid the overturning of the goods. And through the above process, the cushion plate 12 of this layer can be repeatedly lifted to complete the connection work. Only need to continue to rotate the turntable 15, so that the push column 16 is removed from the notch 14 of the first-layer cushion plate 12, and enters the push groove 13 of the lower-layer cushion plate 12 along an arc path, and the limiting screw 38 is inserted into the guide groove to fix the position; After the lower cushion plate 12 is lifted to the original upper height, the pulling operation is repeated to achieve continuous loading. After use, if the cushion plate 12 needs to be recycled, only need to insert the guide rail wheel 20 into the guide rail groove in the reverse direction, so that the push column 16 moves in the reverse direction, reverse the turntable 15, the push column 16 retracts along the push groove 13 to the starting end, and the guide rail wheel 20 slides from the arc groove 18 into the flat groove 17. Then manually press the spring piece 37 of the stopper 36, the stopper 36 moves away briefly, the guide rail wheel 20 enters the positioning groove 19 and slides down to reset, and the cushion plate 12 automatically retracts into the placement box 1. In the four-wheel mode, if encountering severe bumps, the swing rod 3 further squeezes the elastic piece 35, and frictional damping is generated at the contact surface between the arc-shaped notch and the fixed block 34.

[0029] The hydraulic device 21 in this application is a common prior art, and its structure will not be described in detail.

[0030] By setting the placement box, cushion plate, swing rod, anti-skid tire, transmission shaft, incomplete gear, rack, rectangular plate, transmission screw, motor, sleeve, rotating shaft, transmission gear, idler gear, connecting gear, guide groove, guide post, push groove, push column, guide rail groove and guide rail wheel, the state of the wheels can be intelligently switched during its use on the battlefield. Through the coupling of the incomplete gear and rack linkage mechanism and the elastic sheet damping system, the mobility of the two-wheel mode and the stability of the four-wheel mode are quickly switched, solving the problem that the traditional trolley cannot have both passability and stability. At the same time, it provides efficient mixed loading and unloading of people and goods. Through the linkage of the push column, notch mechanism and guide rail groove, the switching loading of the upper and lower cushion plates is realized. Each operation can continuously transport two layers of goods or wounded. At the same time, through hydraulic lifting docking, the manpower requirement is reduced, and the risk of falling during the lifting process is eliminated. The swing rod contacts the elastic sheet to form a pre-tightening force, which can absorb impact energy. During severe bumps, the swing rod squeezes the concave notch of the fixed block to generate frictional damping, further reducing the vibration transmission rate. And the swing rod can be prevented from folding accidentally by disengaging and locking the incomplete gear, preventing the wheel state from failing during travel. By cooperating the inclined surface of the stopper with the spring piece, it is ensured that the cushion plate is automatically locked after being unfolded, avoiding the risk of slipping. The cushion plate can carry personnel or materials, realizing the dual use of one vehicle and reducing equipment redundancy. Specifically, it can adaptively switch the wheel state, alternately lift the double cushion plates, and have elastic shock absorption, solving the problems of low efficiency, single function and insufficient safety of traditional battlefield transfer equipment, and achieving breakthroughs in the convenience of individual operation, multi-task adaptability and survivability in complex environments; This structure is simple, easy to operate, novel in conception and strong in usability.

Claims

1. A stretcher vehicle for transferring the sick and wounded on the battlefield, comprising a rectangular storage box (1) with an opening facing upward, characterized in that: The left and right sides of the lower side wall of the placement box (1) are respectively rotatably connected to a front-to-back axial transmission shaft (2), the front and rear ends of the transmission shaft (2) respectively penetrate the placement box (1) and are fixed with swing rods (3), the two swing rods (3) on the right are located between the two swing rods (3) on the left, the swing rods (3) on the left and right are distributed in a V shape, the lower ends of the swing rods (3) are rotatably connected to anti-skid tires via rotating columns (4) on the front and rear axes, the plurality of rotating columns (4) are coaxially arranged, an incomplete gear (5) is coaxially fixedly connected to the transmission shaft (2), the two incomplete gears (5) are symmetrical on the left and right, and the placement box ( 1) A rectangular groove (6) is provided on the lower side wall and is located below the gear. A rectangular plate (7) that can slide forward and backward is provided in the rectangular groove (6). A guide groove (8) that passes through the rectangular plate (7) is provided in an upward and downward direction. The two guide grooves (8) are arranged in an eight-shaped pattern. Slide grooves (9) are provided on the left and right sides of the lower side wall of the storage box (1) and the lower ends of the slide grooves (9) are connected to the rectangular groove (6). Racks (10) are slidably connected in the slide grooves (9). The two racks (10) are respectively meshed with the incomplete gears (5) on the corresponding sides thereof and have guide posts (11) fixed at the lower ends thereof and inserted into the guide grooves (8) on the corresponding sides thereof. The placement box (1) is provided with two pads (12) arranged up and down, the pad (12) on the lower side can move up and down, and the pad (12) is provided with push grooves (13) at the lower end connected to the outside on the front and rear sides respectively, and the push grooves (13) on the front and rear sides are connected to the outside at opposite ends, and the pad (12) is provided with an arc-shaped notch (14), the upper side of the notch (14) is connected to the outside and the lower side is connected to the push groove (13), and the placement box (1) is rotatably connected with a turntable (15) on the front and rear sides respectively, and the opposite surfaces of the two turntables (15) are eccentrically fixed with push columns (16), and the push columns (16) are inserted into the push groove (13) in the upper pad (12) and can move in the notch (14), so as to place The box (1) is provided with guide grooves on both the front and rear sides, and the left and right ends of the guide grooves are respectively connected to the outside. The guide grooves are composed of two flat grooves (17) and an arc groove (18). The arc groove (18) is located between the two flat grooves (17) and is connected to the two flat grooves (17). The upper end of the arc groove (18) is connected to the outside. Positioning grooves (19) are respectively provided on the front and rear side walls of the placement box (1). The two positioning grooves (19) are arranged on the left and right sides and the upper ends are connected to the flat grooves (17) on the corresponding sides. The front and rear ends of the two pads (12) are respectively rotatably connected to two guide wheels (20) located in the positioning grooves (19) on the corresponding sides. The guide wheels (20) can be inserted into the guide grooves and can move in the guide grooves.

2. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The left and right ends of the storage box (1) are respectively provided with hydraulic devices (21), and the left end of the storage box (1) is fixed with a handrail (22).

3. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The lower side wall of the storage box (1) is provided with a sleeve (23) extending in a front-to-back axial direction. The sleeve (23) is rotatable and can slide forward and backward. The turntable (15) can rotate along with the rotation of the sleeve (23). A transmission screw (24) extending in a front-to-back axial direction is rotatably connected to the lower side wall of the storage box (1). The transmission screw (24) is threadedly connected to the rectangular plate (7) and can rotate along with the rotation of the sleeve (23).

4. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The left and right ends of the sleeve (23) are coaxially fixed with transmission gears (25), the upper outer side of the turntable (15) is provided with a plurality of tooth grooves (26) evenly distributed along the circumferential direction thereof, and the front and rear sides of the lower side wall of the placement box (1) are rotatably connected with idler gears (27) located between the turntable (15) and the transmission gear (25), the upper side of the idler gear (27) is meshed with the tooth grooves (26) on the corresponding side thereof and the lower side can be meshed with the transmission gear (25), and the left end of the transmission screw (24) is fixed with a connecting gear (28) located behind the transmission gear (25), and the upper side of the connecting gear (28) can be meshed with the transmission gear (25).

5. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: A positioning block (29) is fixed at the front end of the placement box (1), a motor is fixed in the positioning block (29), a rotating shaft (30) coaxial with the sleeve (23) is fixed at the output end of the motor, the rotating shaft (30) is slidably connected to the sleeve (23) through a key and a keyway, a connecting block (31) is rotatably connected at the rear end of the sleeve (23), a moving screw (32) is fixed at the rear end of the connecting block (31), the rear end of the moving screw (32) penetrates the placement box (1) and extends out, and the placement box (1) is respectively provided with a clearance groove (33) on the front and rear sides, and the transmission gear (25) is located in the clearance groove (33).

6. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The placement box (1) is respectively fixed with two left and right opposite fixing blocks (34) on the front and rear sides. The fixing blocks (34) are provided with arc-shaped notches. Arc-shaped elastic sheets (35) are fixed in the notches. The elastic sheets (35) can contact the side walls of the swing rods (3) on the corresponding sides.

7. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The storage box (1) is provided with two opposite and inverted L-shaped stoppers (36) slidably connected to the front and rear side walls, respectively. The stoppers (36) can block the connection between the positioning groove (19) and the flat groove (17) on the corresponding side. The left end surface of the stopper (36) is an inclined surface. The step surface of the stopper (36) contacts the storage box (1) through a spring sheet (37). The opposite ends of the stoppers (36) on the left and right sides penetrate the storage box (1) and extend out.

8. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The front and rear sides of the placement box (1) are respectively threadedly connected with limiting screws (38), and the limiting screws (38) are inserted into the guide rail grooves on the corresponding sides and can contact the guide rail wheels (20) on the corresponding sides.

9. The stretcher vehicle for transferring the wounded and sick on the battlefield according to claim 1 is characterized in that: The lower side wall of the storage box (1) is provided with four upwardly opening pressing grooves (39), the bottom surface of the pressing groove (39) is connected to a support column (41) via a compression spring (40), the upper end of the support column (41) is in contact with the pad (12), and the left and right ends of the pad (12) are respectively slidably connected with an inverted U-shaped pull handle (42), and the pull handle (42) can be extended from the pad (12).

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