Barrier-free lifting device for special vehicles

Abstract

The utility model relates to police restraint equipment technical field discloses barrier -free lifting equipment for special vehicle, including the compartment, the inner wall of compartment is provided with displacement subassembly, the bottom right side fixedly connected with support plate of compartment, the top of support plate is provided with lifting mechanism, the lifting mechanism includes the bearing panel, the bearing panel sets up the top of support plate, the top front and back side of bearing panel and support plate all are seted up with the sliding slot, the inner wall adjacent side of multiple sliding slot all slide connection has the sliding block no. In the utility model, the servo motor drives the worm rotation, and the transmission is engaged with the worm wheel, promotes the threaded rod drive slide bar to go up, and the symmetrical double scissor structure of cooperation scissor arm, the sliding block in the sliding slot and the support limiting effect of the pin, realize the stable lifting of bearing panel, solved the problem that the bearing capacity is insufficient and the high security risk when the special personnel in prior art board.

Description

Technical Field

[0001] This utility model relates to the field of police restraint equipment technology, and in particular to an obstacle-free lifting device for special vehicles. Background Technology

[0002] The barrier-free lifting equipment for special vehicles is an auxiliary lifting device designed specifically for special vehicles. It is mainly used to solve the problem of passage obstacles for special personnel when getting on and off special vehicles. Application scenarios include the transfer of special escorts when special vehicles are performing escort missions, and the emergency transfer of patients with mobility impairments by medical special vehicles. It is a key device to ensure the convenience and safety of personnel transfer when special vehicles are performing special missions.

[0003] Traditional lifting equipment consists of a manual lifting frame, a fixed load-bearing plate, and basic support components. During use, operators need to manually crank a rocker arm to extend and retract the lifting frame, thereby raising and lowering the load-bearing plate. Once the load-bearing plate is level with the ground and the carriage, the special personnel are manually pushed onto the load-bearing plate. Then, the lifting frame is manually adjusted to raise the load-bearing plate to the height of the carriage. Finally, the special personnel are manually transferred into the carriage. However, relying on pure manual operation results in extremely low lifting efficiency and limited load-bearing capacity, which cannot meet the needs of transporting multiple people or special personnel carrying auxiliary equipment.

[0004] Existing technologies for improving lifting methods employ hydraulic drives. However, while hydraulically driven lifting platforms have strong load-bearing capacity, the inherent response characteristics of the hydraulic system result in slow lifting speeds, and the hydraulic pipelines age and leak over long-term use. In escort scenarios, frequent start-ups and shutdowns of equipment and rapid personnel transfers are required. The slow response speed and the risk of oil leaks make it unsuitable for the needs of this scenario. Furthermore, the lack of safety protection components means that uneven pushing force can cause wheelchairs to fall during the process. The technology fails to achieve a synergistic improvement in load-bearing capacity, stability, efficiency, and safety, resulting in insufficient load-bearing capacity and high safety risks when special personnel are riding on it. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an accessible lifting device for special vehicles, aiming to improve the problems of insufficient carrying capacity and high safety risks when special personnel ride in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an obstacle-free lifting device for special vehicles, including a carriage, wherein a displacement component is provided on the inner wall of the carriage, a support plate is fixedly connected to the bottom right side of the carriage, and a lifting mechanism is provided on the top of the support plate; The lifting mechanism includes a support panel disposed on the top of the support plate. The support panel and the support plate have sliding grooves on their front and rear sides. A slider is slidably connected to an adjacent side of the inner wall of each sliding groove. A scissor arm is rotatably connected to the opposite side of each slider. Each scissor arm is rotatably connected to a corresponding sliding groove. A connecting shaft is fixedly connected to the opposite side of each slider. The connecting shaft is rotatably connected to the corresponding scissor arm. Multiple pins are fixedly connected to the opposite side of each scissor arm. A drive assembly is disposed on the top of the support plate, and a blocking assembly is disposed on the top of the support panel.

[0007] As a further description of the above technical solution: The displacement assembly includes a support block slidably connected to the top of the inner wall of the carriage. Two guide rails are provided on the top of the inner wall of the carriage. Sliding blocks are slidably connected to the inner walls of the two guide rails. The two sliding blocks are fixedly connected to the top of the support block. Multiple pulleys are rotatably connected to the front and rear sides of the two sliding blocks. The multiple pulleys are slidably connected to the corresponding guide rails. A connecting rope is slidably connected to the bottom of the pulley. A second pulley is slidably connected to the bottom of the connecting rope. A hook is fixedly connected to the bottom of the second pulley.

[0008] As a further description of the above technical solution: The drive assembly includes multiple base cylinders, each fixedly connected to the top of the support plate. Each base cylinder has a sliding rod slidably connected to its inner wall. Servo motors are fixedly connected to the right sides of the two left-side base cylinders. Worms are fixedly connected to the output ends of the two servo motors. The two worms pass through their respective base cylinders and are rotatably connected to their respective inner walls. Worm wheels are rotatably connected to the bottom of the inner walls of the two front-side base cylinders. The two worm wheels mesh with their respective worms. Threaded rods are fixedly connected to the tops of the two worm wheels, and these threaded rods are threadedly connected to their respective sliding rods.

[0009] As a further description of the above technical solution: The blocking assembly includes two side baffles, which are respectively disposed on the front and rear sides of the top of the supporting panel. A hinge is disposed on the right side of the supporting panel. A front baffle is fixedly connected to the side of the two side baffles and the side adjacent to the hinge. Multiple front baffles are fixedly connected to the top of the supporting panel.

[0010] As a further description of the above technical solution: An inclined plate is provided on the top left side of the support panel. Two hinges are fixedly connected to the top of the inclined plate. Both hinges are fixedly connected to the top of the support panel. Both the support panel and the inclined plate have diamond-shaped grooves on their tops.

[0011] As a further description of the above technical solution: A control panel is fixedly connected to the front right side of the carriage. A display screen is fixedly connected to the top front side of the control panel, and multiple status indicator lights are fixedly connected to the bottom front side of the control panel.

[0012] As a further description of the above technical solution: A brake switch is fixedly connected to the front left side of the carriage, and a pressure sensor is fixedly connected to the front middle side of the carriage.

[0013] As a further description of the above technical solution: Two restraint straps are fixedly connected to the front and rear sides of the inner wall of the carriage, and buckles are fixedly connected between adjacent restraint straps.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the servo motor drives the worm gear to rotate, and the worm gear meshes with the worm wheel to drive the threaded rod to rise. Combined with the symmetrical double scissor structure of the scissor arm, the sliding of the slider in the groove, and the supporting and limiting function of the pin, the load-bearing panel is lifted smoothly. The side baffle, front baffle, and hinge work together to form a protective structure. The inclined plate provides a buffer transition effect, and the diamond groove prevents slippage. This solves the problem of insufficient load-bearing capacity and high safety risks when special personnel ride in the prior art.

[0015] 2. In this utility model, the restraint strap and buckle engage to form a firm constraint on the escorted object. The pulley and connecting rope work together to drive the hook to lift and lower, making it convenient to hook the escorted target. The combination of guide rail, slider and pulley can reduce the resistance during the movement process, ensure the smooth and stable transfer of the escorted object, and further avoid the risk of falling during the transfer process. This solves the problem of the escorted object falling and breaking free during the transfer process in the prior art. Attached Figure Description

[0016] Figure 1 This is a perspective view of the barrier-free lifting device for special vehicles proposed in this utility model; Figure 2 This is a front view of the barrier-free lifting device for special vehicles proposed in this utility model; Figure 3 This is a structural exploded view of the lifting mechanism of the barrier-free lifting device for special vehicles proposed in this utility model; Figure 4This is a structural exploded view of the drive assembly of the barrier-free lifting device for special vehicles proposed in this utility model; Figure 5 This is a structural cross-sectional view of the carriage of the barrier-free lifting device for special vehicles proposed in this utility model; Figure 6 for Figure 5 Enlarged view of point A in the image.

[0017] Legend: 1. Carriage; 2. Lifting mechanism; 201. Load-bearing panel; 202. Slide rail; 203. Slider 1; 204. Scissor arm; 205. Connecting shaft; 206. Pin; 207. Drive assembly; 2071. Base cylinder; 2072. Servo motor; 2073. Worm gear; 2074. Worm wheel; 2075. Threaded rod; 2076. Slide rod; 208. Blocking assembly; 2081. Side baffle; 2082. Front baffle; 2083. Hinge 1; 3. Shifting assembly; 301. Support block; 302. Guide rail; 303. Slider 2; 304. Pulley 1; 305. Connecting rope; 306. Pulley 2; 307. Hook; 4. Support plate; 5. Inclined plate; 6. Hinge 2; 7. Diamond groove; 8. Control panel; 9. Display screen; 10. Status indicator light; 11. Brake switch; 12. Pressure sensor; 13. Restraint strap; 14. Buckle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model provides: an accessible lifting device for special vehicles, including a carriage 1, which provides an installation support base for each component of the device. The inner wall of the carriage 1 is provided with a displacement component 3 to realize the horizontal and vertical displacement of the target inside the carriage 1. A support plate 4 is fixedly connected to the bottom right side of the carriage 1 to support the lifting mechanism 2 and provide a stable installation platform. The top of the support plate 4 is provided with the lifting mechanism 2 to realize the lifting and transfer of special personnel and wheelchairs. The lifting mechanism 2 includes a support panel 201, which directly supports special personnel and wheelchairs. The support panel 201 is located on the top of the support plate 4. Slide grooves 202 are provided on both the front and rear sides of the top of the support panel 201 and the support plate 4, providing a sliding path for the sliders 203. Slides 203 are slidably connected to adjacent sides of the inner walls of the multiple slide grooves 202, connecting to scissor arms 204 and driving their extension and retraction. The scissor arms 204 are rotatably connected to the opposite side of each slider 203, achieving smooth lifting and lowering of the support panel 201 through extension and retraction. The multiple scissor arms 204 are rotatably connected to their corresponding slide grooves 202. A connecting shaft 205 is fixedly connected to the opposite side of each slider 203, reinforcing the sliders 203. To ensure the stability of the connection with the scissor arms 204, multiple connecting shafts 205 are rotatably connected to the corresponding scissor arms 204. Multiple pins 206 are fixedly connected to the opposite sides of the multiple scissor arms 204 to prevent deformation under stress. A drive assembly 207 is provided on the top of the support plate 4 to provide lifting power to the lifting mechanism 2. A blocking assembly 208 is provided on the top of the bearing panel 201 to prevent accidental slippage of special personnel and wheelchairs. The drive assembly 207 includes multiple base cylinders 2071 that accommodate sliding rods 2076 and provide sliding guidance. All base cylinders 2071 are fixedly connected to the top of the support plate 4, and sliding rods 2076 are slidably connected to the inner walls of all base cylinders 2071, directly pushing the bearing panel 201. 01 Lifting mechanism: Servo motors 2072 are fixedly connected to the right sides of the two bottom cylinders 2071 on the left, providing power to the drive assembly 207. Worms 2073 are fixedly connected to the output ends of the two servo motors 2072, transmitting power from the servo motors 2072 to worm gears 2074. The two worm gears 2073 pass through the corresponding bottom cylinders 2071 and are rotatably connected to the inner walls of the corresponding bottom cylinders 2071. Worm gears 2074 are rotatably connected to the bottom of the inner walls of the two front bottom cylinders 2071, cooperating with the worm gears 2073 to achieve power transmission and deceleration. The two worm gears 2074 mesh with the corresponding worm gears 2073, and threaded rods 20 are fixedly connected to the top of the two worm gears 2074. 75. The sliding rod 2076 is raised and lowered by the threaded transmission. The two threaded rods 2075 are respectively threadedly connected to the corresponding sliding rods 2076. The blocking component 208 includes two side baffles 2081 to prevent the wheelchair from sliding to the front and rear sides of the support panel 201. The two side baffles 2081 are respectively set on the front and rear sides of the top of the support panel 201. A hinge 2083 is provided on the right side of the support panel 201 to realize the rotational connection between the side baffles 2081 and the front baffle 2082. The two side baffles 2081 and the adjacent side of the hinge 2083 are fixedly connected to the front baffles 2082 to prevent the wheelchair from sliding to the right side of the support panel 201. Multiple front baffles 2082 are fixedly connected to the top of the support panel 201. Specifically, when special personnel need to be transferred, after the equipment is started, the servo motor 2072 on the right side of the left bottom cylinder 2071 first outputs power, driving the worm gear 2073 fixed at its output end to rotate. Since the worm gear 2073 passes through the bottom cylinder 2071 and meshes with the worm wheel 2074 at the bottom of the inner wall of the front bottom cylinder 2071, the rotation of the worm gear 2073 will drive the worm wheel 2074 to rotate synchronously. The threaded rod 2075 fixed at the top of the worm wheel 2074 rotates together with the worm wheel 2074, and the sliding rod 2076 slidably connected to the inner wall of the bottom cylinder 2071 is screwed... Because the threaded rod 2075 is adapted to the thread, the rotation of the threaded rod 2075 is converted into the vertical upward movement of the slide rod 2076 along the inner wall of the bottom cylinder 2071. When the slide rod 2076 rises, it will drive the top support panel 201 to rise synchronously. At this time, the slider 203, which is slidably connected to the support panel 201 and the top slide groove 202 of the support plate 4, will slide horizontally along the slide groove 202 as the support panel 201 rises. The scissor arm 204, which is rotatably connected to the side away from the slider 203, will extend and retract under the action of the slider 203. At the same time, the scissor arm 204 is connected to the slide rod 2076 through the connecting shaft 205. Block 203 maintains a stable connection, and together with multiple pins 206 fixed to the opposite side of the scissor arm 204, it further strengthens the structural strength of the scissor arm 204, preventing deformation due to uneven stress. Multiple sets of scissor arms 204 and slide rod 2076 together form a multi-point support structure, significantly improving the load-bearing capacity of the equipment and solving the problem of insufficient load-bearing capacity in existing technologies. When the load-bearing panel 201 is raised to the target height flush with the carriage 1, the blocking component 208 begins to play a protective role. The operator can flip the load-bearing panel 201 back and forth using the hinge 2083 on the right side of the load-bearing panel 201. The side baffle 2081 changes the position from horizontal to vertical. At the same time, the front baffle 2082 unfolds in conjunction with the side baffle 2081, forming a protective barrier around the load-bearing panel 201 together with the front baffle 2082 fixed to the top of the load-bearing panel 201. This effectively prevents special personnel and wheelchairs from accidentally sliding out. Throughout the process, the stable support of the base cylinder 2071 and the sliding rod 2076, as well as the structural reinforcement of the scissor arm 204 and the pin 206, combined with the protective function of the blocking component 208, comprehensively reduce safety risks and ensure that special personnel can complete the transfer safely and smoothly.

[0020] Reference Figure 5 and Figure 6The displacement component 3 includes a support block 301, on which a pulley 304 is mounted and moves along a guide rail 302. The support block 301 is slidably connected to the top of the inner wall of the carriage 1. Two guide rails 302 are provided on the top of the inner wall of the carriage 1 to provide a sliding track for the slider 303. Slider 303 is slidably connected to the inner wall of each guide rail 302, connecting the support block 301 to the guide rails 302 and causing the support block 301 to slide. Both sliders 303 are fixedly connected to the top of the support block 301. The front and rear sides of the two sliders 303 are... Multiple pulleys 304 are rotatably connected to reduce the friction between the slider 303 and the guide rail 302. The multiple pulleys 304 are slidably connected to the corresponding guide rails 302. A connecting rope 305 is slidably connected to the bottom of the pulley 304, connecting the pulley 304 and the second pulley 306 and realizing the transmission of force. The bottom of the connecting rope 305 is slidably connected to the second pulley 306, changing the direction of force on the connecting rope 305 and driving the hook 307 to rise and fall. The bottom of the second pulley 306 is fixedly connected to the hook 307 to hook the target to be moved. Specifically, when it is necessary to move the target inside the carriage 1, the drive device in the guide rail 302 is first activated, which drives the slider 303, which is fixed to the top of the support block 301, to slide along the guide rail 302 on the top of the inner wall of the carriage 1. Multiple pulleys 304, rotatably connected to the front and rear sides of the slider 303, move synchronously. The pulleys 304 slide into contact with the guide rail 302, converting the sliding friction between the slider 303 and the guide rail 302 into rolling friction, significantly reducing the moving resistance and ensuring that the support block 301 moves stably along the guide rail 302. After the support block 301 moves above the target, the length of the connecting rope 305 is adjusted to connect... The top of rope 305 is slidably connected to the bottom of pulley 1 304, and the bottom is slidably engaged with pulley 2 306. By controlling the winding and unwinding of the connecting rope 305, pulley 2 306 is driven to move vertically downward. After the hook 307 fixed at the bottom of pulley 2 306 contacts the target, the hook 307 is reliably connected to the target. Then, the connecting rope 305 is wound in the opposite direction, and pulley 2 306 drives the target to rise synchronously to a safe height. Then, the target is transferred to the designated position in the carriage 1 by sliding slider 2 303 along guide rail 302. Finally, the connecting rope 305 is slowly lowered to complete the target transfer operation, ensuring the stability and safety of the transfer throughout the process.

[0021] Reference Figure 1 and Figure 3 An inclined plate 5 is provided on the top left side of the support panel 201 to achieve a smooth transition between the wheelchair and the support panel 201 on the ground. Two hinges 6 are fixedly connected to the top of the inclined plate 5 to achieve a rotatable connection between the inclined plate 5 and the support panel 201. Both hinges 6 are fixedly connected to the top of the support panel 201. Diamond grooves 7 are provided on the top of both the support panel 201 and the inclined plate 5 to increase the friction between the wheelchair wheels and the panel and prevent slippage. Specifically, when a person with disabilities uses a wheelchair to transfer to the support panel 201, the tilting plate 5 plays a crucial transitional role. Because the tilting plate 5 is connected to the top left side of the support panel 201 via hinge 2 6, it can rotate around hinge 2 6 and adjust the tilt angle according to the height difference between the ground and the support panel 201, facilitating smooth wheelchair access. At the same time, the diamond-shaped groove 7 on the top of the support panel 201 and the tilting plate 5 can increase the friction between the wheelchair wheels and the panel, preventing the wheelchair from slipping and ensuring a smooth and safe transfer process for people with disabilities, further optimizing the barrier-free transfer experience.

[0022] Reference Figure 1 , Figure 2 and Figure 5 A control panel 8 is fixedly connected to the front right side of the carriage 1 for operators to control the operation of the equipment. A display screen 9 is fixedly connected to the front top of the control panel 8 to display the equipment operating parameters in real time. Multiple status indicator lights 10 are fixedly connected to the front bottom of the control panel 8 to provide feedback on the equipment operating status through different colors. A brake switch 11 is fixedly connected to the front left side of the carriage 1 to cut off the power of the equipment in an emergency. A pressure sensor 12 is fixedly connected to the front middle of the carriage 1 to detect the load weight of the load-bearing panel 201. Two restraint straps 13 are fixedly connected to the front and rear sides of the inner wall of the carriage 1 to secure the personnel and wheelchairs inside the carriage 1. Buckles 14 are fixedly connected between adjacent restraint straps 13 to lock and secure the restraint straps 13. Specifically, during equipment operation, operators can start and stop the equipment and adjust parameters through the control panel 8. The display screen 9 on the top front side displays the equipment's operating status in real time, while multiple status indicator lights 10 at the bottom use different colors to indicate whether the equipment is functioning properly, facilitating timely troubleshooting. When the equipment is transporting special personnel, the brake switch 11 on the left front side of the carriage 1 can cut off the power in an emergency to avoid sudden situations. The pressure sensor 12 in the middle front side can detect the load on the load-bearing panel 201 and trigger an alarm when overloaded. After personnel enter the carriage 1, the restraint straps 13 on the front and rear sides of the inner wall can fix the wheelchair and the personnel's body. They are locked by the buckles 14 between adjacent restraint straps 13 to prevent displacement during transport, ensuring operational controllability and personnel safety.

[0023] Working Principle: When the personnel to be transported are transferred to the carrying panel 201, the servo motor 2072 is first started. After the servo motor 2072 outputs power, it directly drives the worm gear 2073 to rotate. Since the worm gear 2073 and the worm wheel 2074 are in a meshing state, the worm wheel 2074 will rotate synchronously under the drive of the worm gear 2073, thereby driving the connected threaded rod 2075 to rotate. Under the action of threaded transmission, the threaded rod 2075 will push the slide rod 2076 to rise vertically. The rise of the slide rod 2076 will directly drive the carrying panel 201 to complete the lifting action. During the entire lifting process, the scissor arm 204 will perform a smooth extension and retraction movement based on its symmetrical double scissor structure design. At the same time, the slider 203 will slide along a preset trajectory inside the slide groove 202 to further ensure the lifting process. The stability of the process; in addition, the pin 206 plays a key supporting and limiting role for the scissor arm 204, effectively preventing the scissor arm 204 from deforming due to uneven force. When the load-bearing panel 201 is raised to the target height, the operator can move the side baffle 2081 and the front baffle 2082. Under the rotation of the hinge 2083, the baffle will quickly unfold and form a protective structure, thereby preventing the risk of the wheelchair accidentally sliding off the platform. When the wheelchair wheels move from the load-bearing panel 201 into the carriage 1, the tilting plate 5 can play a buffer transition role, greatly reducing the impact of the wheelchair caused by bumps during the transfer, ensuring that the entire transfer process is safe and stable. Moreover, the diamond groove 7 can prevent the wheelchair tires from slipping in wet environments, solving the problem of insufficient load-bearing capacity and high safety risks when special personnel ride in the prior art.

[0024] When it is necessary to transfer the escorted object, the restraint strap 13 is used to tightly bind the key parts of the escorted object's body, and then the restraint strap 13 is locked in place by the buckle 14 to ensure that the restraint strap 13 will not loosen. Subsequently, the pulley 2 306 will slide along the preset path. During this process, the pulley 2 306 will lengthen the connecting rope 305, so that the hook 307 connected to the end of the connecting rope 305 will slowly move down. After the hook 307 accurately hooks the escorted object, the guide rail 302 is activated to drive the slider 2 303 to slide along the guide rail 302. Since the slider 2 303 is connected to the pulley 1 304, the pulley 1 304 can convert the sliding friction between the slider 2 303 and the guide rail 302 into rolling friction, which significantly reduces the resistance during the movement process and makes the entire transfer process smoother and more stable. This whole set of operating procedures can form a firm restraint and stable transfer protection for the escorted object, solving the problem of the escorted object falling and breaking free during the transfer process in the prior art.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A barrier-free lifting device for special vehicles, comprising a carriage (1), characterized in that: The inner wall of the carriage (1) is provided with a displacement component (3), and a support plate (4) is fixedly connected to the bottom right side of the carriage (1). A lifting mechanism (2) is provided on the top of the support plate (4). The lifting mechanism (2) includes a bearing panel (201), which is located on the top of the support plate (4). The bearing panel (201) and the support plate (4) are provided with sliding grooves (202) on the front and rear sides of the top. The inner walls of the multiple sliding grooves (202) are slidably connected to adjacent sides of each sliding groove (202). The first side away from the first sliding groove (203) is rotatably connected to a scissor arm (204). The multiple scissor arms (204) are rotatably connected to the corresponding sliding grooves (202). The first side away from the first sliding groove (203) is fixedly connected to a connecting shaft (205). The multiple connecting shafts (205) are rotatably connected to the corresponding scissor arms (204). The far side of the multiple scissor arms (204) is fixedly connected to multiple pins (206). The top of the support plate (4) is provided with a driving assembly (207), and the top of the bearing panel (201) is provided with a blocking assembly (208).

2. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: The displacement component (3) includes a support block (301), which is slidably connected to the top of the inner wall of the carriage (1). Two guide rails (302) are provided on the top of the inner wall of the carriage (1). Sliding blocks (303) are slidably connected to the inner walls of the two guide rails (302). The two sliding blocks (303) are fixedly connected to the top of the support block (301). Multiple pulleys (304) are rotatably connected to the front and rear sides of the two sliding blocks (303). The multiple pulleys (304) are slidably connected to the corresponding guide rails (302). A connecting rope (305) is slidably connected to the bottom of the pulley (304). A pulley (306) is slidably connected to the bottom of the connecting rope (305). A hook (307) is fixedly connected to the bottom of the pulley (306).

3. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: The drive assembly (207) includes multiple base cylinders (2071), all of which are fixedly connected to the top of the support plate (4). Each of the base cylinders (2071) has a sliding rod (2076) slidably connected to its inner wall. Servo motors (2072) are fixedly connected to the right sides of the two base cylinders (2071) on the left side. Worms (2073) are fixedly connected to the output ends of the two servo motors (2072). The two worm gears (2073) pass through the... The corresponding bottom cylinder (2071) is rotatably connected to the inner wall of the corresponding bottom cylinder (2071). The bottom of the inner wall of the two front bottom cylinders (2071) is rotatably connected to a worm gear (2074). The two worm gears (2074) are respectively meshed with the corresponding worm (2073). The top of the two worm gears (2074) is fixedly connected to a threaded rod (2075). The two threaded rods (2075) are respectively threadedly connected to the corresponding slide rod (2076).

4. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: The blocking assembly (208) includes two side baffles (2081), which are respectively disposed on the front and rear sides of the top of the support panel (201). A hinge (2083) is disposed on the right side of the support panel (201). A front baffle (2082) is fixedly connected to the adjacent side of the two side baffles (2081) and the hinge (2083). A plurality of front baffles (2082) are fixedly connected to the top of the support panel (201).

5. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: An inclined plate (5) is provided on the top left side of the support panel (201). Two hinges (6) are fixedly connected to the top of the inclined plate (5). Both hinges (6) are fixedly connected to the top of the support panel (201). A diamond-shaped groove (7) is provided on the top of both the support panel (201) and the inclined plate (5).

6. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: A control panel (8) is fixedly connected to the front right side of the carriage (1), a display screen (9) is fixedly connected to the front top of the control panel (8), and multiple status indicator lights (10) are fixedly connected to the front bottom of the control panel (8).

7. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: A brake switch (11) is fixedly connected to the left front side of the carriage (1), and a pressure sensor (12) is fixedly connected to the middle front side of the carriage (1).

8. The barrier-free lifting device for special vehicles according to claim 1, characterized in that: The inner wall of the carriage (1) is fixedly connected with two restraint straps (13) on both the front and rear sides, and the multiple restraint straps (13) are fixedly connected with buckles (14) between each other.

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