A passive bidirectional foldable adaptive blocking portable rescue vehicle

Abstract

The present invention provides a passive, bidirectional, foldable, adaptive, and portable rescue vehicle. With the X-direction as the travel direction, the vehicle body forms a through channel along the X-direction, with the side facing the rescue object serving as the channel entrance and the other side serving as the channel exit. A pair of track wheel assemblies, a pair of folding mechanisms, and a passive rescue mechanism are provided outside the channel. The pair of track wheel assemblies driven by a drive device and the pair of folding mechanisms are symmetrically arranged along the Y-direction, and the track wheels on both sides can be synchronously brought together or reset along the travel direction as the pair of folding mechanisms fold or unfold. The passive rescue mechanism presses down the inlet-side blocking rod and lifts up the outlet-side blocking rod as the pair of track wheel assemblies travel. The downward pressure releases the blocking on the channel entrance side, while the upward pressure maintains the blocking on the channel exit side. The present invention utilizes a passive rescue structure, which helps reduce equipment complexity and energy consumption, and reduces maintenance difficulty. The vehicle body is foldable and portable.

Description

Technical Field

[0001] The present invention relates to a crawler rescue vehicle, more particularly to a passive bidirectional foldable adaptive blocking portable rescue vehicle. Background Art

[0002] Tracked rescue vehicles are specialized vehicles designed for performing rescue missions in complex terrain. Compared to tires, tracks provide a larger ground contact area, resulting in higher traction. They also effectively distribute the vehicle's weight, reducing ground pressure. This allows for better maneuverability and stability on uneven or soft surfaces, such as mud, snow, mountains, or disaster sites. Common applications for tracked rescue vehicles include: rescue efforts following natural disasters such as earthquakes, floods, and avalanches; industrial accidents such as mining disasters and building collapses; military applications for battlefield rescue, equipment, or personnel transportation; and polar expeditions for scientific research or rescue missions in extremely cold and snow-covered areas.

[0003] However, most of the current tracked rescue vehicles are large in size, heavy in mass, complex in structure, and high in energy consumption, making them inconvenient to carry. In addition, most of the rescue equipment is active mechanical equipment, which further increases the complexity and energy consumption of the equipment. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention proposes a passive bidirectional foldable adaptive blocking portable rescue vehicle, which adopts a passive rescue structure, which is conducive to reducing equipment complexity and energy consumption, reducing maintenance difficulty, and the body is foldable and easy to carry.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A passive bidirectional foldable adaptive blocking portable rescue vehicle, the structural features of which are:

[0007] With the travel direction as the X direction, the vehicle body forms a through passage for accommodating rescue objects along the X direction, with the side facing the rescue object as the passage entrance and the side away from the rescue object as the passage exit. The passage is surrounded by a detachable top plate, a bottom plate, and a pair of side plates arranged along the Y direction;

[0008] Outside the passage, there are a pair of track wheel assemblies, a pair of folding mechanisms, and a passive rescue mechanism;

[0009] A pair of crawler wheel assemblies are symmetrically arranged along the Y direction and driven by a driving device;

[0010] A pair of folding mechanisms are symmetrically arranged along the Y direction, respectively located between the track wheel assembly and the side plate on the side where they are located, and respectively form a rotating pair with a pair of wheel shafts of the track wheel assembly on the side where they are located. They are connected by a pair of transverse main connecting rods symmetrically arranged along the X direction and can move synchronously. The pair of track wheels of the track wheel assemblies on both sides can be synchronously moved together or reset along the direction of travel as the pair of folding mechanisms are folded or unfolded;

[0011] The passive rescue mechanism is symmetrically arranged along the X and Y directions, and rollers parallel to the track wheel axles and rotatable around the central axis are respectively arranged at the channel inlet and the channel outlet. The force generated by the inlet-side rollers contacting the ground as the pair of track wheel assemblies move drives the pair of longitudinal connecting rods on the inlet side to swing in the XZ plane, and is transmitted through the pair of longitudinal connecting rods on the outlet side and the four groups of connecting rod assemblies to drive the inlet-side material blocking rod to be pressed down and the outlet-side material blocking rod to be lifted up. The inlet-side material blocking rod and the outlet-side material blocking rod are parallel to the track wheel axles and cantilevered outside the channel inlet and the channel outlet respectively. They are initially located above the ground and are used for blocking the material entering and exiting the channel. The blocking on the channel inlet side is released by pressing down the inlet-side material blocking rod, and the blocking on the channel outlet side is maintained by lifting the outlet-side material blocking rod.

[0012] The structural characteristics of the present invention are also:

[0013] The folding mechanism includes a main folding arm, a secondary folding arm, a transverse main connecting rod, and a rotation limiting assembly; the main folding arm and the secondary folding arm are X-shaped folding frames arranged along the XZ plane, and a limited rotation pair is formed between them through the rotation limiting assembly, which can rotate within a set angle range, and the rotation center axis is centrally arranged between a pair of track wheel axles along the direction of travel and parallel to the track wheel axles. The bottom ends of the main folding arm and the secondary folding arm are respectively coaxially connected to a pair of track wheel axles of the track wheel assembly on the side to form a rotation pair, and the top ends are respectively fixedly mounted on a pair of transverse main connecting rods.

[0014] The rotation limit assembly includes a pair of rotating disks, which include a coaxial disk body and a cylinder body. The pair of rotating disks are coaxial, the disk bodies are in contact with each other, and the opposite ends of the cylinder bodies are rotatably mounted on each other, and the main folding arm and the auxiliary folding arm are respectively inserted radially through the other ends. In the pair of rotating disks, one of the disk bodies is provided with a coaxial arc-shaped limiting hole around the central axis of the disk body, and the other disk body is provided with an axially outwardly protruding limiting pin according to the position of the arc-shaped limiting hole. The limiting pin can movably pass through the arc-shaped limiting hole, and the rotation limit between the main folding arm and the auxiliary folding arm is formed through the cooperation of the limiting pin and the arc-shaped limiting hole.

[0015] The passive rescue mechanism includes a pair of rollers, four double-tube connectors, four longitudinal links, four groups of link assemblies, a pair of material blocking rods, four suspension rods, and a pair of limit rods; between the side panels and a pair of folding mechanisms, located at the intersection of the transverse main link and the side panels, the upper parts of the four longitudinal links are swingably mounted on the transverse main link around the central axis of the transverse main link through double-tube connectors, and can slide in the Z direction through the double-tube connector, and a rotatable roller is cross-braced between the lower parts of each pair of longitudinal links aligned in the Y direction; between the longitudinal links and a pair of folding structures, a pair of limit rods are fixedly suspended by a pair of transverse main links through four suspension rods, and a pair of limit rods are horizontally suspended along the X direction, and are located at the height position where the lower part of the longitudinal link is located, relative to each other. One side is provided with an X-direction slide groove, and four groups of connecting rod assemblies are symmetrically arranged along the X and Y directions, and are respectively arranged between four longitudinal connecting rods and a pair of limit rods. Each group of connecting rod assemblies includes a push-pull rod and a main connecting rod. The lower part of the longitudinal connecting rod is provided with a connecting piece, which is slidably arranged in the X-direction slide groove along the X-direction through the connecting piece. The main connecting rod is a V-shaped rod body structure with the tip facing upward and arranged along the XZ plane. The tip is rotatably arranged on the limit rod, and the rod end facing the channel along the X-direction is hinged to the push-pull rod, and the other end of the push-pull rod is hinged to the connecting piece at the lower part of the longitudinal connecting rod. A rotatable material blocking rod is cross-braced between the rod ends of each pair of main connecting rods aligned along the Y direction facing outside the channel along the X-direction. A pair of material blocking rods are spaced apart from the side rollers along the X-direction and cantilevered outside the channel.

[0016] The bottom plate is installed between the lower parts of the four longitudinal connecting rods through the bottom plate bracket, and the bottom plate and the bottom plate bracket are detachable.

[0017] The top plate is inserted into the pin holes reserved in a pair of transverse main connecting rods through pins, and is detachably plugged into the pair of transverse main connecting rods.

[0018] A pair of side plates are detachably mounted on a pair of longitudinal connecting rods aligned along the X direction on the respective sides through clamps. A pair of side plates are respectively formed with trumpet-shaped material guide ports with the large ends facing outward along the X direction corresponding to the channel inlet and the channel outlet.

[0019] The active track wheel of the track wheel assembly is driven by a motor and can rotate, and the passive track wheel is driven to rotate synchronously through the track.

[0020] Compared with the existing technology, the beneficial effects of the present invention are embodied in:

[0021] 1. The passive rescue mechanism can be realized by utilizing the power of the whole vehicle, without the need for additional power, energy-saving, environmentally friendly and easy to maintain;

[0022] The passive rescue mechanism drives a pair of longitudinal connecting rods to swing as the rescue vehicle moves forward, through the force generated by the contact between the inlet side roller and the ground. The inlet side blocking rod is pressed down and the outlet side blocking rod is lifted up by pulling the connecting rod assembly. The blocking of the inlet side of the channel is released by pressing down the inlet side blocking rod, and the blocking of the outlet side of the channel is maintained by lifting the outlet side blocking rod. No additional power is required for this purpose, making the rescue vehicle lighter and the structure more compact. In addition, since this part of the power is eliminated, the maintenance difficulty and cost of the passive rescue mechanism are lower.

[0023] 2. Passive rescue agencies can collect in both directions;

[0024] Since the passive rescue mechanism is symmetrically arranged along the X and Y directions, the four connecting rod assemblies and the four longitudinal connecting rods move synchronously with the movement of the rescue vehicle. This allows the connecting rod assembly and the pair of longitudinal connecting rods on either side of the channel to press down the blocking rod on the same side and lift up the blocking rod on the other side, thus achieving the function of collecting rescue objects in either direction.

[0025] 3. Make the rescue vehicle foldable;

[0026] A pair of folding mechanisms enables the pair of track wheels of the rescue vehicle track wheel assembly to be folded, thereby achieving a certain degree of folding and storage of the rescue vehicle body, reducing occupied space, and facilitating transportation and carrying of the rescue vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the present invention after removing the top plate, bottom plate, and a pair of side plates;

[0029] Figure 3 yes Figure 2 Structural diagram from another perspective;

[0030] Figure 4 It is a schematic diagram of the local structure of the rotation limit assembly;

[0031] Figure 5 It is a schematic diagram of the local structure of the connecting rod assembly.

[0032] In the picture:

[0033] 1 track wheel assembly;

[0034] 2 folding mechanism; 21 main folding arm; 22 secondary folding arm; 23 transverse main connecting rod; 24 rotation limit assembly; 241 disk body; 2411 arc-shaped limit hole; 2412 limit pin; 242 cylinder body;

[0035] 3 Passive rescue mechanism; 31 Roller; 32 Double-tube connector; 321 Y-direction sleeve; 322 Z-direction sleeve; 33 Longitudinal connecting rod; 331 Connecting piece; 34 Connecting rod assembly; 341 Push-pull rod; 342 Main connecting rod; 35 Material stop rod; 36 Lifting rod; 37 Limit rod; 371 X-direction chute;

[0036] 41 top plate; 42 bottom plate; 421 bottom plate bracket; 43 side plate; 44 channel. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] Please refer to Figures 1 to 5 The passive bidirectional foldable adaptive blocking portable rescue vehicle structure of this embodiment includes:

[0039] With the travel direction as the X direction, the vehicle body is formed with a through channel 44 along the X direction for accommodating rescue objects. The side facing the rescue object is the entrance of the channel 44, and the side away from the rescue object is the exit of the channel 44. The channel 44 is surrounded by a detachable top plate 41, a bottom plate 42, and a pair of side plates 43 provided along the Y direction.

[0040] Outside the passage 44, there are provided a pair of track wheel assemblies 1, a pair of folding mechanisms 2, and a passive rescue mechanism 3;

[0041] A pair of crawler wheel assemblies 1 are symmetrically arranged along the Y direction and driven by a driving device;

[0042] A pair of folding mechanisms 2 are symmetrically arranged along the Y direction, respectively located between the track wheel assembly 1 on the corresponding side and the side plate 43, and are respectively rotatably connected to a pair of wheel shafts of the track wheel assembly 1 on the corresponding side to form a rotating pair. They are connected by a pair of transverse main connecting rods 23 symmetrically arranged along the X direction and can move synchronously. The pair of track wheels of the track wheel assemblies 1 on both sides can be synchronously moved together or reset along the travel direction as the pair of folding mechanisms 2 are folded or unfolded;

[0043] The passive rescue mechanism 3 is symmetrically arranged along the X and Y directions. Rollers 31 parallel to the track wheel axles and rotatable around the central axis are respectively arranged at the inlet and outlet of the channel 44. The force generated by the inlet-side rollers 31 contacting the ground as the pair of track wheel assemblies 1 move forward drives the pair of longitudinal connecting rods 33 on the inlet side to swing in the XZ plane. The pair of longitudinal connecting rods 33 on the outlet side and the four groups of connecting rod assemblies 34 transmit the power, driving the inlet-side blocking rod 35 to press down and the outlet-side blocking rod 35 to lift up. The inlet-side blocking rod 35 and the outlet-side blocking rod 35 are parallel to the track wheel axles and respectively overhang the inlet and outlet of the channel 44. Initially, they are located above the ground and are used for blocking the material entering and exiting the channel 44. The blocking on the inlet side of the channel 44 is released by pressing down the inlet-side blocking rod 35, and the blocking on the outlet side of the channel 44 is maintained by lifting the outlet-side blocking rod 35.

[0044] In specific implementation, the passive bidirectional foldable adaptive blocking portable rescue vehicle structure also includes:

[0045] The folding mechanism 2 includes a main folding arm 21, a secondary folding arm 22, a transverse main connecting rod 23, and a rotation limit assembly 24; the main folding arm 21 and the secondary folding arm 22 are X-shaped folding frames arranged along the XZ plane, and a limited rotation pair is formed between them through the rotation limit assembly 24, which can rotate within a set angle range, and the rotation center axis is centered along the direction of travel between a pair of track wheel axles and parallel to the track wheel axles. The bottom ends of the main folding arm 21 and the secondary folding arm 22 are respectively coaxially connected to a pair of track wheel axles of the track wheel assembly 1 on the side to form a rotation pair, and the top ends are respectively fixedly mounted on a pair of transverse main connecting rods 23.

[0046] The rotation limit assembly 24 includes a pair of rotating disks, which include a coaxial disk body 241 and a cylinder body 242. The pair of rotating disks are coaxial, and the disk bodies 241 are attached to each other. The opposite ends of the cylinder body 242 are rotatably arranged, and the main folding arm 21 and the auxiliary folding arm 22 are respectively inserted radially through the other end. In the pair of rotating disks, one of the disk bodies 241 is provided with a coaxial arc-shaped limiting hole 2411 around the central axis of the disk body 241, and the other disk body 241 is provided with an axially protruding limiting pin 2412 according to the position of the arc-shaped limiting hole 2411. The limiting pin 2412 can movably pass through the arc-shaped limiting hole 2411. Through the cooperation of the limiting pin 2412 and the arc-shaped limiting hole 2411, a rotation limit is formed between the main folding arm 21 and the auxiliary folding arm 22.

[0047] It is further provided that the exposed column of the limiting pin 2412 has an external thread and can be locked by a locking nut to maintain the current posture between the main folding arm 21 and the auxiliary folding arm 22.

[0048] The passive rescue mechanism 3 includes a pair of rollers 31, four double-tube connectors 32, four longitudinal links 33, four groups of link assemblies 34, a pair of material blocking rods 35, four suspension rods 36, and a pair of limit rods 37. Between the side plates 43 and the pair of folding mechanisms 2, the four longitudinal links 33 are located at the intersection of the side plates 43 and the side plates 43. The upper parts of the four longitudinal links 33 are respectively swingably mounted on the transverse main links 23 around the central axis of the transverse main links 23 through the double-tube connectors 32, and can slide in the Z direction through the double-tube connectors 32. A rotatable roller 31 is horizontally supported between the lower parts of each pair of longitudinal links 33 aligned in the Y direction. Between the longitudinal links 33 and the pair of folding structures, a pair of limit rods 37 are fixedly suspended by a pair of transverse main links 23 through four suspension rods 36. The pair of limit rods 37 are horizontally suspended along the X direction and are located at the height position of the lower part of the longitudinal links 33. The opposite side has an X-direction slide groove 371. The four connecting rod assemblies 34 are symmetrically arranged along the X and Y directions, and are respectively arranged between the four longitudinal connecting rods 33 and a pair of limit rods 37. Each connecting rod assembly 34 includes a push-pull rod 341 and a main connecting rod 342. The lower part of the longitudinal connecting rod 33 is provided with a connecting piece 331, which is slidably arranged in the X-direction slide groove 371 along the X direction through the connecting piece 331. The main connecting rod 342 is a V-shaped rod structure with the tip facing upward and arranged along the XZ plane. The tip rotates It is set on the limit rod 37, and the rod end facing the channel 44 along the X direction is hinged to the push-pull rod 341. The other end of the push-pull rod 341 is hinged to the connecting piece 331 at the bottom of the longitudinal connecting rod 33. A rotatable blocking rod 35 is horizontally supported between the rod ends of each pair of main connecting rods 342 aligned along the Y direction and facing the outside of the channel 44 along the X direction. A pair of blocking rods 35 maintains a spacing with the side roller 31 along the X direction, and initially overhangs outside the channel 44.

[0049] The double-tube connector 32 is composed of two sleeves distributed in a cross shape. It is rotatably mounted on the transverse main connecting rod 23 through a Y-direction sleeve 321 that passes through the Y-direction, and the longitudinal connecting rod 33 is slidably inserted into it through a Z-direction sleeve 322 that passes through the Z-direction.

[0050] Initially, the upper portion of the longitudinal link 33 is exposed above the Z-direction sleeve 322 , which reserves a length for the longitudinal link 33 to slide along the X-direction slot 371 on the limiting rod 37 while swinging around the transverse main link 23 through the Y-direction sleeve 321 .

[0051] The base plate 42 is installed between the connecting pieces 331 at the lower part of the four longitudinal links 33 through the base plate bracket. The base plate 42 and the base plate bracket 421 can be assembled and disassembled by bolts, and the base plate bracket 421 and the connecting piece 331 can be assembled and disassembled by bolts. The roller 31 is horizontally supported between the connecting pieces 331 of a pair of longitudinal links 33 and is in contact with the ground.

[0052] As an optional solution, the top plate 41 can be inserted into the pin holes reserved in the pair of transverse main connecting rods 23 through pins, and can be detachably connected to the pair of transverse main connecting rods 23.

[0053] As an optional solution, a pair of side plates 43 are detachably mounted on a pair of longitudinal connecting rods 33 aligned along the X direction on their respective sides through clamps, and the pair of side plates 43 correspond to the inlet of the channel 44 and the outlet of the channel 44 and jointly form a trumpet-shaped material guide port with the large end facing outward along the X direction.

[0054] The active track wheel of the track wheel assembly 1 is driven by a motor and can rotate, and the passive track wheel is driven to rotate synchronously by the track. It can be selected according to the existing technology. This embodiment further embodies a foldable and passive two-way design, which is not shown in the figure.

[0055] When used for rescue, the passive rescue function of the passive bidirectional foldable adaptive blocking portable rescue vehicle (hereinafter referred to as the "rescue vehicle") of this embodiment is reflected in:

[0056] Step 1: When the rescue vehicle is deployed and moving, the side facing the direction of travel, the inlet side roller, contacts the ground. Under the interaction, the inlet side roller drives the longitudinal link through the double-tube connector to swing forward and in the opposite direction around the transverse main link;

[0057] In step 2, the roller on the inlet side will also pull the connecting part to slide forward and in the opposite direction along the X-direction slide groove of the limit rod. At this time, the push-pull rod on the inlet side of the channel will also move forward and in the opposite direction. The swing of the main connecting rod on the inlet side around the hinge shaft at the tip will pull the inlet side blocking rod, causing the inlet side blocking rod to be pressed down.

[0058] Step 3: Approach the rescue object. Under the power of the crawler wheels, the rescue object moves along the inlet side blocking rod into the rescue vehicle channel until it completely enters the bottom plate of the channel;

[0059] Step 4: During the movement of the rescue vehicle, the roller on the exit side will also move in the reverse direction, driving the connector of the longitudinal connecting rod on the exit side to slide forward and in the reverse direction along the X-direction slide groove of the limit rod. At this time, the push-pull rod on the exit side will also move forward and in the reverse direction, and the main connecting rod on the exit side will swing around the hinge shaft at the tip to pull the exit side blocking rod, causing the inlet side blocking rod to lift up.

[0060] After the rescue, the foldable function of the passive bidirectional foldable adaptive blocking portable rescue vehicle of this embodiment is reflected in:

[0061] Step 1: Remove the top plate, bottom plate, and side plates;

[0062] Step 2: Lift up a pair of transverse main connecting rods to relax the crawler tracks before disassembly.

[0063] Step 3: Continue to lift the transverse main link to reach the maximum folding limit of the X-shaped folding frame to complete the folding of the rescue vehicle.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A passive bidirectional foldable adaptive intercepting portable rescue vehicle, characterized by: With the travel direction as the X direction, the vehicle body forms a through passage for accommodating rescue objects along the X direction, with the side facing the rescue object as the passage entrance and the side away from the rescue object as the passage exit. The passage is surrounded by a detachable top plate, a bottom plate, and a pair of side plates arranged along the Y direction; Outside the passage, there are a pair of track wheel assemblies, a pair of folding mechanisms, and a passive rescue mechanism; A pair of crawler wheel assemblies are symmetrically arranged along the Y direction and driven by a driving device; A pair of folding mechanisms are symmetrically arranged along the Y direction, respectively located between the track wheel assembly and the side plate on the side where they are located, and respectively form a rotating pair with a pair of wheel shafts of the track wheel assembly on the side where they are located. They are connected by a pair of transverse main connecting rods symmetrically arranged along the X direction and can move synchronously. The pair of track wheels of the track wheel assemblies on both sides can be synchronously moved together or reset along the direction of travel as the pair of folding mechanisms are folded or unfolded; The passive rescue mechanism is symmetrically arranged along the X and Y directions, and rollers parallel to the track wheel axles and rotatable around the central axis are respectively arranged at the channel inlet and the channel outlet. The force generated by the inlet-side rollers contacting the ground as the pair of track wheel assemblies move drives the pair of longitudinal connecting rods on the inlet side to swing in the XZ plane, and is transmitted through the pair of longitudinal connecting rods on the outlet side and the four groups of connecting rod assemblies to drive the inlet-side material blocking rod to be pressed down and the outlet-side material blocking rod to be lifted up. The inlet-side material blocking rod and the outlet-side material blocking rod are parallel to the track wheel axles and cantilevered outside the channel inlet and the channel outlet respectively. They are initially located above the ground and are used for blocking the material entering and exiting the channel. The blocking on the channel inlet side is released by pressing down the inlet-side material blocking rod, and the blocking on the channel outlet side is maintained by lifting the outlet-side material blocking rod.

2. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 1 is characterized by: The folding mechanism includes a main folding arm, a secondary folding arm, a transverse main connecting rod, and a rotation limiting assembly; the main folding arm and the secondary folding arm are X-shaped folding frames arranged along the XZ plane, and a limited rotation pair is formed between them through the rotation limiting assembly, which can rotate within a set angle range, and the rotation center axis is centrally arranged between a pair of track wheel axles along the direction of travel and parallel to the track wheel axles. The bottom ends of the main folding arm and the secondary folding arm are respectively coaxially connected to a pair of track wheel axles of the track wheel assembly on the side to form a rotation pair, and the top ends are respectively fixedly mounted on a pair of transverse main connecting rods.

3. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 2 is characterized by: The rotation limit assembly includes a pair of rotating disks, which include a coaxial disk body and a cylinder body. The pair of rotating disks are coaxial, the disk bodies are in contact with each other, and the opposite ends of the cylinder bodies are rotatably mounted on each other, and the main folding arm and the auxiliary folding arm are respectively inserted radially through the other ends. In the pair of rotating disks, one of the disk bodies is provided with a coaxial arc-shaped limiting hole around the central axis of the disk body, and the other disk body is provided with an axially outwardly protruding limiting pin according to the position of the arc-shaped limiting hole. The limiting pin can movably pass through the arc-shaped limiting hole, and the rotation limit between the main folding arm and the auxiliary folding arm is formed through the cooperation of the limiting pin and the arc-shaped limiting hole.

4. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 1 or 2, characterized in that: The passive rescue mechanism includes a pair of rollers, four double-tube connectors, four longitudinal links, four groups of link assemblies, a pair of material blocking rods, four suspension rods, and a pair of limit rods; between the side panels and a pair of folding mechanisms, located at the intersection of the transverse main link and the side panels, the upper parts of the four longitudinal links are swingably mounted on the transverse main link around the central axis of the transverse main link through double-tube connectors, and can slide in the Z direction through the double-tube connector, and a rotatable roller is cross-braced between the lower parts of each pair of longitudinal links aligned in the Y direction; between the longitudinal links and a pair of folding structures, a pair of limit rods are fixedly suspended by a pair of transverse main links through four suspension rods, and a pair of limit rods are horizontally suspended along the X direction, and are located at the height position where the lower part of the longitudinal link is located, relative to each other. One side is provided with an X-direction slide groove, and four groups of connecting rod assemblies are symmetrically arranged along the X and Y directions, and are respectively arranged between four longitudinal connecting rods and a pair of limit rods. Each group of connecting rod assemblies includes a push-pull rod and a main connecting rod. The lower part of the longitudinal connecting rod is provided with a connecting piece, which is slidably arranged in the X-direction slide groove along the X-direction through the connecting piece. The main connecting rod is a V-shaped rod body structure with the tip facing upward and arranged along the XZ plane. The tip is rotatably arranged on the limit rod, and the rod end facing the channel along the X-direction is hinged to the push-pull rod, and the other end of the push-pull rod is hinged to the connecting piece at the lower part of the longitudinal connecting rod. A rotatable material blocking rod is cross-braced between the rod ends of each pair of main connecting rods aligned along the Y direction facing outside the channel along the X-direction. A pair of material blocking rods are spaced apart from the side rollers along the X-direction and cantilevered outside the channel.

5. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 1 or 4, characterized in that: The bottom plate is installed between the lower parts of the four longitudinal connecting rods through the bottom plate bracket, and the bottom plate and the bottom plate bracket are detachable.

6. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 1 is characterized by: The top plate is inserted into the pin holes reserved in a pair of transverse main connecting rods through pins, and is detachably plugged into the pair of transverse main connecting rods.

7. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 1 is characterized by: A pair of side plates are detachably mounted on a pair of longitudinal connecting rods aligned along the X direction on the respective sides through clamps. A pair of side plates are respectively formed with trumpet-shaped material guide ports with the large ends facing outward along the X direction corresponding to the channel inlet and the channel outlet.

8. The passive bidirectional foldable adaptive blocking portable rescue vehicle according to claim 1 is characterized by: The active track wheel of the track wheel assembly is driven by a motor and can rotate, and the passive track wheel is driven to rotate synchronously through the track.

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