Ambulance for plateau alpine region

Abstract

The invention relates to the field of ambulance equipment for plateau alpine regions, in particular to an ambulance for plateau alpine regions, which comprises a folding ladder stand mechanism, the folding ladder stand mechanism comprises an ambulance body, two fixing plates are fixedly arranged at the lower end of the tail of the ambulance body, a plurality of pedals are arranged between the fixing plates, and turnover assemblies and reciprocating lifting mechanisms are arranged on the two sides of each pedal. The lifting device comprises a plurality of vertical sliding grooves formed in the fixing plate, lifting assemblies and anti-falling assemblies are arranged in the vertical sliding grooves, and first limiting assemblies are further arranged in the vertical sliding grooves; and the guide limiting mechanism comprises two guide grooves fixedly formed in the inner side wall of the fixing plate, and second limiting assemblies are arranged at the front ends of the guide grooves. The problems that in the prior art, in the plateau hypoxia environment, extra manual lifting is needed for transferring a patient with mobility difficulty, so that physical strength of medical staff is overdraft, and the first-aid time cannot be prolonged due to the fact that forms cannot be switched according to actual needs are solved.

Description

Technical Field

[0001] This invention relates to the field of ambulance equipment for high-altitude and cold-weather applications, and in particular to an ambulance designed for use in high-altitude and cold-weather environments. Background Technology

[0002] Ambulances used in high-altitude and cold regions are typically equipped with fixed or folding ladders at the rear for loading and unloading personnel and for transporting patients. These ladders mainly consist of fixed steps and a simple folding structure. The steps are connected by hinges, and when unfolded, they form a stepped ladder that fits snugly against the vehicle body when folded.

[0003] However, in high-altitude and frigid environments, the existing devices have limited functionality, serving only as ladders. For patients with mobility issues or requiring stretcher transport, additional manpower is needed for lifting. The hypoxic environment at high altitudes can easily lead to exhaustion for medical staff. Furthermore, the devices lack stability, as they lack effective limiting mechanisms after unfolding, making them prone to swaying during lifting and lowering. The extreme cold can also cause folding components to jam, affecting operational efficiency. Additionally, they have poor adaptability, failing to switch forms according to the patient's condition. During stretcher transport, the angle needs to be repeatedly adjusted, increasing the time and cost of emergency care. Summary of the Invention

[0004] In view of the problems in the above-mentioned or existing technologies, such as the need for additional manpower to carry patients with mobility difficulties in high-altitude hypoxic environments, which leads to physical exhaustion of medical staff, and the inability to switch modes to increase emergency rescue time according to actual needs, this invention is proposed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a folding ladder mechanism, comprising an ambulance body, two fixed plates fixedly installed at the lower rear end of the ambulance body, a plurality of pedals disposed between the fixed plates, and flipping components disposed on both sides of the pedals, the flipping components being used to unfold the pedals to form a ladder or a reclining board; a reciprocating lifting mechanism, comprising a plurality of vertical sliding grooves formed on the fixed plates, wherein a lifting component is disposed in the vertical sliding groove located on one side of the pedal, the lifting component being used to drive the flattened pedal to rise and fall, and an anti-detachment component is disposed in the inner cavity of the vertical sliding groove on the side away from the pedal, the anti-detachment component being used to prevent instability during the lifting and falling of the pedal; a first limiting component is also disposed in the vertical sliding groove located on one side of the pedal, the first limiting component being used to fix or separate the flipping component from the fixed plate, thereby enabling the flipping component to rise and fall with the lifting component; and a guide limiting mechanism, comprising two guide grooves fixedly disposed on the inner sidewall of the fixed plate, a second limiting component being disposed at the front end of the guide groove, the second limiting component being used to limit the lifting component.

[0006] As a preferred embodiment of the present invention for an ambulance used in high-altitude and cold regions, the tilting assembly includes a support crossbar disposed on the upper part of the inner surface of a fixed plate. A first connecting rod is rotatably disposed at the front end of the support crossbar. A double-folding rod is rotatably disposed at the front end of the first connecting rod. Two meshing gears are rotatably disposed in the middle of the double-folding rod. Each gear is rotatably connected to a second connecting rod. The second connecting rod is fixedly connected to a pedal.

[0007] As a preferred embodiment of the present invention for an ambulance used in high-altitude and cold regions, wherein: a drive shaft is fixedly installed through the end of the second connecting rod away from the gear, a servo motor is fixedly installed at one end of the drive shaft, and the servo motor is slidably installed on the outer wall of one of the fixed plates.

[0008] As a preferred embodiment of the present invention for use in ambulances in high-altitude and cold regions, the lifting assembly includes two fixed seats fixedly installed at the lower rear end of the ambulance body. Each fixed seat is fixedly equipped with a telescopic rod. A sleeve is fixedly installed at the telescopic end of the telescopic rod. The sleeve is slidably installed in the inner cavity of a vertical sliding groove and is movably penetrated by a drive shaft. A third connecting rod is fixedly installed at the other end of the sleeve. An L-shaped opening groove is opened at the other end of the third connecting rod. A slider is engaged in the inner cavity of the L-shaped opening groove. A horizontal sliding groove is slidably installed at the other end of the slider. The horizontal sliding groove is opened in the middle of the outer wall of the first connecting rod.

[0009] As a preferred embodiment of the present invention for use in ambulances in high-altitude and cold regions, wherein: a tension spring is provided at one end of the sleeve of the transverse sliding groove, and the tension spring is used to pull the slider to reset, thereby realizing the limiting of the slider on the third connecting rod.

[0010] As a preferred embodiment of the present invention for an ambulance used in high-altitude and cold regions, the anti-detachment component includes a U-shaped limiting plate slidably disposed in a fixed plate. The U-shaped limiting plate is used to limit the downward movement of the support crossbar when it exceeds the lower inclined surface of the fixed plate. A return spring is fixedly disposed on the upper opening surface of the U-shaped limiting plate.

[0011] As a preferred embodiment of the present invention for use in ambulances in high-altitude and cold regions, the other end of the reset spring is connected to the inner cavity of the fixed plate, thereby enabling the reset spring to pull the U-shaped limiting plate to reset.

[0012] As a preferred embodiment of the present invention for use in ambulances operating in high-altitude and cold regions, wherein: the first limiting component includes a semi-circular groove formed in the middle of the sleeve, a fixed post is movably disposed through the inner cavity of the semi-circular groove, an arc-shaped block is fixedly disposed at one end of the fixed post, and the other end of the fixed post is fixedly connected to the drive shaft.

[0013] As a preferred embodiment of the present invention for use in ambulances in high-altitude and cold regions, the first limiting component further includes a semi-circular limiting groove formed at the upper end of the inner cavity of the fixed plate. The semi-circular limiting groove is rotatably engaged with the arc-shaped block for limiting, thereby achieving the fixed limiting or separation of the drive shaft and the fixed plate.

[0014] As a preferred embodiment of the present invention for use in ambulances in high-altitude and cold regions, the second limiting component includes a trapezoidal block slidably disposed in the middle of the inner sidewall of the fixed plate. The front end of the trapezoidal block is used to abut and limit the third connecting rod. A compression spring is provided on the back of the trapezoidal block, and the compression spring is used to push the trapezoidal block to achieve reset.

[0015] The beneficial effects of the ambulance of the present invention for use in high-altitude and cold regions:

[0016] 1. The flip-up component allows the pedal to unfold into a ladder for people to get on and off the vehicle, or it can be extended into a reclining board for patients with limited mobility or those who need to be transported by stretcher. No additional tools are required, which solves the problem of the single function of existing devices and reduces the time cost of shape adjustment during the emergency process.

[0017] 2. The reciprocating lifting mechanism can drive the platform that unfolds into a reclining board to rise and fall, making it easy to send patients into the carriage. This avoids the situation where medical staff are exhausted from carrying patients in the hypoxic environment of high altitude, thus improving the efficiency of emergency rescue.

[0018] 3. Anti-detachment components are set to prevent instability when the pedal is raised or lowered. The first limit component fixes or separates the flip component from the fixed plate, and the second limit component limits the lifting component. Multiple limits ensure the stable operation of the equipment in high-altitude and cold environments and reduce the impact of problems such as jamming of folding parts on operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an overall schematic diagram of an ambulance used in high-altitude and cold regions.

[0021] Figure 2 This is a schematic diagram of a ladder-like structure used in ambulances operating in high-altitude and cold regions.

[0022] Figure 3 This is a schematic diagram of a reclining ambulance used in high-altitude and cold regions.

[0023] Figure 4This is a schematic diagram of the folding mechanism of an ambulance used in high-altitude and cold regions.

[0024] Figure 5 This is a schematic diagram of the tipping mechanism transmission for ambulances used in high-altitude and cold regions.

[0025] Figure 6 This is a schematic diagram showing the positions of the tilting and lifting components of an ambulance used in high-altitude and cold regions.

[0026] Figure 7 for Figure 6 An enlarged schematic diagram of the structure at point A.

[0027] Figure 8 This is a schematic diagram of the explosion of the tipping assembly of an ambulance used in high-altitude and cold regions.

[0028] Figure 9 This is a schematic diagram showing the positions of the guide groove and the second limiting component in an ambulance used in high-altitude and cold regions.

[0029] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point B.

[0030] Figure 11 This is a schematic diagram of the explosion of the first limiting component of an ambulance used in high-altitude and cold regions.

[0031] Figure 12 This is a schematic diagram showing the location of the anti-detachment component in an ambulance used in high-altitude and cold-weather vehicles.

[0032] In the diagram: 10. Ambulance body; 11. Fixing plate; 12. Pedal; 13. Tilting assembly; 131. Support crossbar; 132. First connecting rod; 133. Double folding rod; 134. Gear; 135. Second connecting rod; 136. Drive shaft; 137. Servo motor; 20. Vertical slide groove; 21. Lifting assembly; 211. Fixing seat; 212. Telescopic rod; 213. Sleeve; 214. Third connecting rod; 215. L-shaped opening groove; 216. Slider; 217. Horizontal slide groove; 218. Tension spring; 22. Anti-detachment assembly; 221. U-shaped limiting plate; 222. Return spring; 23. First limiting assembly; 231. Semicircular groove; 232. Fixing column; 233. Arc block; 234. Semicircular limiting groove; 30. Guide groove; 31. Second limiting assembly; 311. Trapezoidal block; 312. Compression spring. Detailed Implementation

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Example 1, referring to Figures 1-12This is the first embodiment of the present invention, which provides an ambulance for use in high-altitude and cold regions. It can transform the form of the ladder according to the different conditions of patients, making it easier for patients to enter the ambulance. It includes a folding ladder mechanism, comprising an ambulance body 10, with two fixed plates 11 fixedly installed at the lower rear of the ambulance body 10. Several pedals 12 are arranged between the fixed plates 11, and flipping components 13 are provided on both sides of each pedal 12. The flipping components 13 are used to unfold the pedals 12 to form a ladder or a reclining board. A reciprocating lifting mechanism includes several vertical sliding grooves 20 formed on the fixed plates 11, wherein a lifting mechanism is provided in the vertical sliding groove 20 located on one side of the pedal 12. Component 21, lifting component 21 is used to drive the flattened pedal 12 to rise and fall, and the inner cavity of the vertical slide groove 20 away from the pedal 12 is provided with anti-detachment component 22, which is used to prevent the pedal 12 from being unstable during the rising and falling process. The vertical slide groove 20 located on the side of the pedal 12 is also provided with a first limiting component 23, which is used to fix or separate the flipping component 13 from the fixed plate 11, so that the flipping component 13 can follow the lifting component 21 to rise and fall; the guide limiting mechanism includes two guide grooves 30 fixedly provided on the inner side wall of the fixed plate 11, and a second limiting component 31 is provided at the front end of the guide groove 30, which is used to limit the lifting component 21.

[0035] Specifically, under normal conditions, the flip assembly 13 can retract the footboard 12 to the lower rear of the ambulance body 10. When needed, the footboard 12 can be extended to serve as a ladder for people to enter and exit the vehicle. The flip assembly 13 can also extend the footboard 12 into a reclining board, allowing patients with mobility issues or those requiring a stretcher to sit directly on it or place the stretcher directly on it. The lifting assembly 21 can raise and lower the footboard 12 in the reclining board state, making it easier to transport special patients into the vehicle and saving personnel more energy in the high-altitude hypoxic environment.

[0036] Furthermore, the flipping assembly 13 includes a support crossbar 131 disposed on the upper part of the inner surface of the fixed plate 11. A first connecting rod 132 is rotatably disposed at the front end of the support crossbar 131. A double folding rod 133 is rotatably disposed at the front end of the first connecting rod 132. Two meshing gears 134 are rotatably disposed in the middle of the double folding rod 133. Each gear 134 is rotatably connected to a second connecting rod 135. The second connecting rod 135 is fixedly connected to the pedal 12.

[0037] The second connecting rod 135 has a transmission shaft 136 fixedly installed at the end away from the gear 134. A servo motor 137 is fixedly installed at one end of the transmission shaft 136. The servo motor 137 is slidably installed on the outer wall of one of the fixed plates 11.

[0038] The number of flipping components 13 is determined by the number of pedals 12, so that multiple flipping components 13 cooperate with each other, so that the pedals 12 can be folded and stored while also being divided into two different states. The upper and lower ends of the double folding rod 133 are rotatably connected to the first connecting rod 132, and the two gears 134 are respectively connected to the two second connecting rods 135. Thus, when the first connecting rod 132 and the second connecting rod 135 rotate, they drive the two gears 134 to mesh and rotate, thereby pushing the pedals 12 and the first connecting rod 132 and the second connecting rod 135 to flip.

[0039] In use, when the ladder function is needed, the servo motor 137 starts and drives the drive shaft 136 to rotate. The drive shaft 136 drives the connected second link 135 to rotate. When the second link 135 rotates, it drives the connected gear 134 to rotate. Under the pulling limit of the first link 132 and the double folding rod 133, and because the two gears 134 are meshed with each other, when one gear 134 rotates, the other gear 134 will mesh and rotate around that gear, thus causing the other second link 135 to rotate as well. As the second link 135 rotates, it drives the double folding rod 133 to move. The double folding rod 133 then pulls the first link 132 to rotate around the support crossbar 131. Multiple flipping components 13 cooperate with each other to unfold the step 12 originally stored at the lower end of the rear of the ambulance body 10, forming a ladder for people to enter and exit the vehicle.

[0040] When it is necessary to transport patients with limited mobility or those requiring stretchers into the carriage and the reclining function needs to be used, the servo motor 137 is restarted. Through the aforementioned transmission process, multiple pedals 12 are extended into a single reclining board under the action of the flipping assembly 13.

[0041] Example 2, refer to Figures 1-12 This is the second embodiment of the present invention. Unlike the previous embodiment, based on embodiment 1, this embodiment provides a reciprocating lifting mechanism for ambulances used in high-altitude and cold regions. It solves the problem that staff need to use a lot of physical strength to lift patients into the ambulance due to the high altitude and lack of oxygen at high altitudes. It includes a lifting assembly 21, which includes two fixed seats 211 fixedly installed at the lower end of the rear of the ambulance body 10. Each fixed seat 211 is fixedly provided with a telescopic rod 212. The telescopic end of the telescopic rod 212 is fixedly provided with a sleeve 213. The sleeve 213 is slidably installed in the inner cavity of the vertical slide groove 20 and is movably penetrated by the drive shaft 136. The other end of the sleeve 213 is fixedly provided with a third connecting rod 214. The other end of the third connecting rod 214 is provided with an L-shaped opening groove 215. A slider 216 is engaged in the inner cavity of the L-shaped opening groove 215. The other end of the slider 216 is slidably provided with a horizontal slide groove 217. The horizontal slide groove 217 is opened in the middle of the outer wall of the first connecting rod 132.

[0042] A tension spring 218 is provided at one end of the sleeve 213 in the transverse slide groove 217. The tension spring 218 is used to pull the slider 216 to reset, thereby limiting the slider 216 to the third connecting rod 214.

[0043] Specifically, the mutual engagement and limiting of the slider 216 and the L-shaped opening slot 215 enables the third link 214 and the first link 132 to be connected as a whole, so that when the first link 132 rotates, it drives the L-shaped opening slot 215 to rotate together.

[0044] Furthermore, the anti-detachment component 22 includes a U-shaped limiting plate 221 slidably disposed in the fixed plate 11. The U-shaped limiting plate 221 is used to limit the downward movement of the support crossbar 131 when it exceeds the lower inclined surface of the fixed plate 11. A reset spring 222 is fixedly disposed on the upper open surface of the U-shaped limiting plate 221. The other end of the reset spring 222 is connected to the inner cavity of the fixed plate 11, thereby enabling the reset spring 222 to pull the U-shaped limiting plate 221 to reset.

[0045] Among them, the U-shaped limiting plate 221 can increase the downward movement distance of the support crossbar 131, so that the support crossbar 131 can always maintain a stable connection with the fixed plate 11 during the downward movement, so that the pedal 12 in the lying state will not tilt as a whole due to the large weight at the front end.

[0046] Preferably, the first limiting component 23 includes a semi-circular groove 231 formed in the middle of the sleeve 213, a fixed post 232 is movably disposed through the inner cavity of the semi-circular groove 231, an arc-shaped block 233 is fixedly disposed at one end of the fixed post 232, and the other end of the fixed post 232 is fixedly connected to the drive shaft 136.

[0047] The first limiting component 23 also includes a semi-circular limiting groove 234 formed at the upper end of the inner cavity of the fixed plate 11. The semi-circular limiting groove 234 and the arc block 233 are rotatably engaged and limited, thereby realizing the fixed limiting or separation of the transmission shaft 136 and the fixed plate 11.

[0048] It should be noted that the semi-circular groove 231 is opened on the side of the sleeve 213, so that the sleeve 213 can still rotate the arc block 233 through the transmission shaft 136 while maintaining the overall state. This allows the arc block 233 to rotate into the inner cavity of the semi-circular limiting groove 234, thereby limiting the entire flip assembly 13. This ensures that the flip assembly 13 and the pedal 12 can be stably connected to the fixed plate 11 in both the climbing state and the folded-back state. When the board is flattened into a lying state, the arc block 233 and the semi-circular limiting groove 234 are separated. At this time, the flip assembly 13 and the pedal 12 can continue to maintain a stable state through the action of the support crossbar 131 and the corresponding fixed plate 11, as well as the support of the telescopic rod 212. However, since the telescopic rod 212 and the servo motor 137 are existing technologies, their structural principles will not be elaborated here.

[0049] When in use, when the lifting function of the pedal 12 is required, the pedal 12 in the climbing state is first unfolded into the lying state by the flipping component 13. At this time, the arc block 233 in the first limiting component 23 rotates with the transmission shaft 136 and rotates out from the semi-circular limiting groove 234, thereby separating from the semi-circular limiting groove 234 and releasing the fixation between the flipping component 13 and the fixing plate 11.

[0050] At this time, the fixed seat 211 and the telescopic rod 212 are in a retracted state, flush with the frame of the ambulance body 10, while the third link 214 is in a state perpendicular to the ground. When the pedal 12 rotates to the ladder state, the first link 132 will be inserted into the L-shaped opening slot 215 through the slider 216 set on it, and under the action of the tension spring 218, the slider 216 and the L-shaped opening slot 215 will be locked and limited, thereby making the first link 132 and the third link 214 form a whole. Thus, when the first link 132 rotates upward and the pedal 12 is flattened into a reclining state, it drives the third link 214 to move together. Then, the third link 214 drives the sleeve 213 to rotate. When the sleeve 213 rotates, it will drive the telescopic rod 212 and the fixed seat 211 to rotate around the drive shaft 136 from the bottom of the ambulance body 10, thus becoming perpendicular to the ground.

[0051] At this time, the telescopic rod 212 on the fixed base 211 extends and retracts, causing the sleeve 213 to slide in the vertical slide groove 20. The sleeve 213 then moves the transmission shaft 136, which is movably connected through it, downward together. The sleeve 213 transmits power to the first link 132 through the third link 214. Since the L-shaped opening groove 215 of the third link 214 is engaged with the slider 216, and the slider 216 slides in the horizontal slide groove 217 of the first link 132, the extension and retraction of the telescopic rod 212 is converted into the lifting and lowering motion of the first link 132, thereby driving the entire pedal 12 in the lying state to rise and fall. During this process, the tension spring 218 in the horizontal slide groove 217 always applies tension to the slider 216 to ensure that the slider 216 is stably engaged with the L-shaped opening groove 215, ensuring the reliability of power transmission.

[0052] During the lifting and lowering of the pedal 12, when the support crossbar 131 moves down to near the lower inclined surface of the fixed plate 11, the U-shaped limiting plate 221 limits the support crossbar 131 and moves down with it to prevent it from separating from the fixed plate 11 during the downward movement, which would cause the pedal 12 to tilt. When the support crossbar 131 moves up and disengages from the U-shaped limiting plate 221, the return spring 222 pulls the U-shaped limiting plate 221 to return to its original position, ready for the next operation.

[0053] Example 3, referring to Figures 1-12This is the third embodiment of the present invention. Unlike the previous embodiment, based on embodiment 2, this embodiment provides a guide and limiting mechanism for ambulances used in high-altitude and cold regions. It solves the problems of ladder supports not being able to be retracted for stability and poor vehicle passability caused by supports that cannot be retracted due to road conditions. It includes a second limiting component 31, which includes a trapezoidal block 311 slidably disposed in the middle of the inner sidewall of the fixed plate 11. The front end of the trapezoidal block 311 is used to abut and limit the third connecting rod 214. A compression spring 312 is provided on the back of the trapezoidal block 311, and the compression spring 312 is used to push the trapezoidal block 311 to achieve reset.

[0054] Specifically, a groove is provided on the side wall of the fixed plate 11 to accommodate the retraction of the trapezoidal block 311, so that the trapezoidal block 311 can be squeezed when the third link 214 rotates, causing it to retract. The third link 214 in the retracted state will be abutted and limited by the trapezoidal block 311, so that it can be in a stable state during vehicle movement.

[0055] When the pedal 12 is used and retracted, the pedal 12 is first rotated in the opposite direction by the flipping component 13. When it is in the climbing state again, the slider 216 will be inserted into the guide groove 30 fixed on the fixed plate 11. Then, under the action of the guide groove 30, it will separate. At this time, the third link 214 will contact the front end of the trapezoidal block 311 and squeeze the trapezoidal block 311, causing it to retract into the fixed plate 11. When the third link 214 rotates to be perpendicular to the ground, it will no longer squeeze the trapezoidal block 311, causing the trapezoidal block 311 to pop out under the action of the compression spring 312 and limit it with the third link 214, so that the third link 214 will not flip due to the weight of the telescopic rod 212 and the fixed base 211.

[0056] 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 technical solutions 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. An ambulance for use in high-altitude and cold regions, characterized in that: include, The folding ladder mechanism includes an ambulance body (10), with two fixed plates (11) fixedly installed at the lower rear end of the ambulance body (10), and several pedals (12) arranged between the fixed plates (11). A flipping component (13) is provided on both sides of the pedal (12), and the flipping component (13) is used to unfold the pedal (12) to form a ladder or a reclining board. The reciprocating lifting mechanism includes several vertical sliding grooves (20) opened on the fixed plate (11). A lifting component (21) is provided in the vertical sliding groove (20) located on one side of the pedal (12). The lifting component (21) is used to drive the flattened pedal (12) to lift and lower. An anti-detachment component (22) is provided in the cavity of the vertical sliding groove (20) on the side away from the pedal (12). The anti-detachment component (22) is used to prevent the pedal (12) from becoming unstable during lifting and lowering. A first limiting component (23) is also provided in the vertical sliding groove (20) located on one side of the pedal (12). The first limiting component (23) is used to fix or separate the flipping component (13) from the fixed plate (11), so that the flipping component (13) can follow the lifting component (21) to lift and lower. The guide limiting mechanism includes two guide grooves (30) fixedly installed on the inner side wall of the fixed plate (11). A second limiting component (31) is provided at the front end of the guide groove (30), and the second limiting component (31) is used to limit the lifting component (21).

2. The ambulance for use in high-altitude and cold regions as described in claim 1, characterized in that: The flipping assembly (13) includes a support crossbar (131) disposed on the upper part of the inner surface of the fixed plate (11). A first connecting rod (132) is rotatably disposed at the front end of the support crossbar (131). A double folding rod (133) is rotatably disposed at the front end of the first connecting rod (132). Two meshing gears (134) are rotatably disposed in the middle of the double folding rod (133). Each gear (134) is rotatably connected to a second connecting rod (135). The second connecting rod (135) is fixedly connected to the pedal (12).

3. The ambulance for use in high-altitude and cold regions as described in claim 2, characterized in that: The second connecting rod (135) is fixedly connected to a drive shaft (136) at one end away from the gear (134). A servo motor (137) is fixedly connected to one end of the drive shaft (136). The servo motor (137) is slidably mounted on the outer wall of one of the fixed plates (11).

4. The ambulance for use in high-altitude and cold regions as described in claim 1, characterized in that: The lifting assembly (21) includes two fixed seats (211) fixedly installed at the lower end of the rear of the ambulance body (10). Each fixed seat (211) is fixedly provided with a telescopic rod (212). The telescopic end of the telescopic rod (212) is fixedly provided with a sleeve (213). The sleeve (213) is slidably installed in the inner cavity of the vertical slide groove (20) and is movably penetrated by the drive shaft (136). The other end of the sleeve (213) is fixedly provided with a third connecting rod (214). The other end of the third connecting rod (214) is provided with an L-shaped opening groove (215). A slider (216) is snapped into the inner cavity of the L-shaped opening groove (215). The other end of the slider (216) is slidably provided with a horizontal slide groove (217). The horizontal slide groove (217) is opened in the middle of the outer wall of the first connecting rod (132).

5. The ambulance for use in high-altitude and cold regions as described in claim 4, characterized in that: The transverse slide groove (217) is provided with a tension spring (218) at one end of the sleeve (213). The tension spring (218) is used to pull the slider (216) to reset, thereby realizing the limiting of the slider (216) on the third link (214).

6. The ambulance for use in high-altitude and cold regions as described in claim 1, characterized in that: The anti-detachment component (22) includes a U-shaped limiting plate (221) slidably disposed in the fixed plate (11). The U-shaped limiting plate (221) is used to limit the downward movement of the support crossbar (131) when it exceeds the lower inclined surface of the fixed plate (11). A reset spring (222) is fixedly disposed on the upper opening surface of the U-shaped limiting plate (221).

7. The ambulance for use in high-altitude and cold regions as described in claim 6, characterized in that: The other end of the reset spring (222) is connected to the inner cavity of the fixed plate (11), thereby enabling the reset spring (222) to pull the U-shaped limiting plate (221) to reset.

8. The ambulance for use in high-altitude and cold regions as described in claim 7, characterized in that: The first limiting component (23) includes a semi-circular groove (231) opened in the middle of the sleeve (213). A fixed post (232) is movably disposed in the inner cavity of the semi-circular groove (231). An arc-shaped block (233) is fixedly disposed at one end of the fixed post (232), and the other end of the fixed post (232) is fixedly connected to the drive shaft (136).

9. The ambulance for use in high-altitude and cold regions as described in claim 8, characterized in that: The first limiting component (23) also includes a semi-circular limiting groove (234) opened at the upper end of the inner cavity of the fixed plate (11). The semi-circular limiting groove (234) and the arc block (233) are rotated and locked to limit the movement, thereby realizing the fixed limiting or separation of the transmission shaft (136) and the fixed plate (11).

10. The ambulance for use in high-altitude and cold regions as described in claim 1, characterized in that: The second limiting component (31) includes a trapezoidal block (311) slidably disposed in the middle of the inner sidewall of the fixed plate (11). The front end of the trapezoidal block (311) is used to abut and limit the third connecting rod (214). A compression spring (312) is provided on the back of the trapezoidal block (311). The compression spring (312) is used to push the trapezoidal block (311) to reset.

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