A foldable chain track

Abstract

The present invention discloses a foldable chain track, which is composed of articulated unit bodies and includes an end unit body I, a plurality of intermediate unit bodies, and an end unit body II; each unit body is provided with a pulley module I, a pulley module II, and a track member; the pulley module I on the upper side of the end unit body I and the end unit body II is for connecting a suspension rope, the pulley module I on the lower side of the end unit body I and the end unit body II and the pulley module I of the intermediate unit bodies are for connecting a traction rope I, and the pulley module II of the end unit body I, the intermediate unit bodies, and the end unit body II is for connecting a traction rope II. The foldable chain track has three forms: a folded form, a U-shaped curved form, and a straight form. When in the folded state, its length dimension can be greatly reduced, which is convenient for transportation, deployment, and recovery, and can adapt to most cases where the distance from the bottom surface of the bridge to the ground or water surface under the bridge is less than the length of the track during the construction and recovery processes.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge detection equipment, and particularly relates to a foldable chain track. Background Art

[0002] To avoid safety accidents, it is necessary to regularly detect the bottom surface of bridges that are long-term exposed to harsh natural environments.

[0003] Currently, the detection of the bottom surface of bridges is divided into manual detection and machine detection. Manual detection has low efficiency, high costs, and high risks of casualties. Machine detection can improve efficiency, reduce costs, and reduce the risk of casualties. Among them, machine detection can be divided into two types. The first type is that a drone is equipped with a computer vision system to take photos of the bottom surface of the bridge. The second type is to first build a track on the bottom surface of the bridge for a trolley to travel on, and then the trolley is equipped with a computer vision system to take photos of the bottom surface of the bridge. The disadvantage of the first method is that when the drone flies under the bridge, the bridge body will block the GPS signal, making it difficult for the drone to be positioned. The second method does not require a GPS signal and has greater advantages in terms of detection efficiency, detection cost, safety, etc., and thus has become a promising direction. The track built under the bridge can be a cantilever track and a two-point suspension track. The cantilever track has limited load-bearing capacity and it is difficult to reach the middle position of a bridge with a large width. The two-point suspension track can cover all positions of a bridge with a large width, and under the same width condition, the two-point suspension track has a stronger load-bearing capacity than the cantilever track.

[0004] Regarding the problem of how to build a two-point suspension track under the bridge, the existing technical solution is as follows: First, suspend one end of a long strip-shaped rigid track with a rope so that it is vertically suspended on one side of the bridge, and then pull the rope fixed to the other end of the long strip-shaped rigid track on the other side of the bridge, so that the long strip-shaped rigid track changes from a vertically suspended state to a horizontally suspended state. The disadvantages of this solution are as follows: For a bridge with a large width, taking a bridge with a width of 25 meters as an example, the length of the long strip-shaped track to be built is greater than 25 meters. Therefore, the transportation, construction, and disassembly of the track are relatively troublesome, affecting the detection efficiency. In addition, if the distance between the bottom surface of a bridge with a large width and the ground or water surface is less than the width, that is, the distance between the bottom surface of the bridge and the ground or water surface is less than 25 meters, the track cannot change from a vertically suspended state to a horizontally suspended state, and the feasibility is poor.

[0005] Therefore, how to provide a foldable chain track that can solve the above technical problems is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0006] The object of the present invention is to provide a foldable chain track, which has three forms: a folded form, a U-shaped curve form, and a straight form. When in the folded state, its length dimension can be greatly reduced, facilitating transportation, deployment, and recovery, and can adapt to most situations where the distance from the bottom surface of the bridge to the ground or water surface under the bridge is less than the length of the track during the construction and recovery processes.

[0007] To achieve the above object, the present invention provides a foldable chain track, which is composed of a plurality of unit bodies hinged together, successively including an end unit body I, several intermediate unit bodies, and an end unit body II; pulley modules I are provided on the upper and lower sides of any one of the unit bodies, pulley modules II are provided on the front side and / or the rear side of any one of the unit bodies, and a track member is provided on any one of the unit bodies; the pulley modules I on the upper sides of the end unit body I and the end unit body II are for connecting a suspension rope, the pulley modules I on the lower sides of the end unit body I and the end unit body II and the pulley modules I of the intermediate unit bodies are for connecting a traction rope I, and the pulley modules II of the end unit body I, the intermediate unit bodies, and the end unit body II are for connecting a traction rope II, so as to make the foldable chain track in a curved state when the traction rope I and the traction rope II are relaxed, in a folded state when the traction rope I is relaxed and the traction rope II is tightened, and in a straight state and the track members are spliced in the same straight line when the traction rope I is tightened and the traction rope II is relaxed.

[0008] Preferably, the end unit body I and / or the end unit body II are / is provided with a winch module I for connecting and driving the traction rope I, and / or, the end unit body I and / or the end unit body II are / is provided with a winch module II for connecting and driving the traction rope II.

[0009] Preferably, the winch module I includes a winch module I-I provided on the end unit body I and a winch module III-I provided on the end unit body II, the winch module II includes a winch module I-II provided on the end unit body I and a winch module III-II provided on the end unit body II, both ends of the traction rope I are connected to the winch module I-I and the winch module III-I, and both ends of the traction rope II are connected to the winch module I-II and the winch module III-II.

[0010] Preferably, the hoisting module I-I includes a hoisting module I-I-I and a hoisting module I-I-II, the hoisting module III-I includes a hoisting module III-I-I and a hoisting module III-I-II, the hoisting module I-II includes a hoisting module I-II-I and a hoisting module I-II-II, the hoisting module III-II includes a hoisting module III-II-I and a hoisting module III-II-II. The towing rope I includes a towing rope I-I connecting the hoisting module I-I-I and the hoisting module III-I-I, and a towing rope I-II connecting the hoisting module I-I-II and the hoisting module III-I-II. The towing rope II includes a towing rope II-I connecting the hoisting module I-II-I and the hoisting module III-II-I, and a towing rope II-II connecting the hoisting module I-II-II and the hoisting module III-II-II. The towing rope I-I and the towing rope I-II are located on the lower side, and the towing rope II-I and the towing rope II-II are located on the front and rear sides.

[0011] Preferably, the suspension rope includes a suspension rope I and a suspension rope II. The pulley module I includes: a pulley module I-I-I, a pulley module I-I-II, and a pulley module I-I-III provided on the end unit I. The pulley module I-I-II and the pulley module I-I-I are located on the lower left and right sides, and the pulley module I-I-III is located on the upper left side and is connected to the suspension rope I. A pulley module III-I-I, a pulley module III-I-II, and a pulley module III-I-III provided on the end unit II. The pulley module III-I-I and the pulley module III-I-II are located on the lower left and right sides, and the pulley module III-I-III is located on the upper right side and is connected to the suspension rope II. A pulley module II-I-I and a pulley module II-I-II provided on the intermediate unit. The pulley module II-I-I is located on the lower left side, and the pulley module II-I-II is located on the upper right side.

[0012] Preferably, the pulley module II includes: the pulley module I-II-I, the pulley module I-II-II, the pulley module I-II-III, and the pulley module I-II-IV provided on the end unit I. The pulley module I-II-I is located at the upper left front side, the pulley module I-II-II is located at the lower right front side, the pulley module I-II-III is located at the upper left rear side, and the pulley module I-II-IV is located at the lower right rear side; the pulley module III-II-I, the pulley module III-II-II, the pulley module III-II-III, and the pulley module III-II-IV provided on the end unit II. The pulley module III-II-I is located at the upper right front side, the pulley module III-II-II is located at the lower left front side, the pulley module III-II-III is located at the upper right rear side, and the pulley module III-II-IV is located at the lower left rear side; the pulley module II-II-I, the pulley module II-II-II, the pulley module II-II-III, and the pulley module II-II-IV provided on the middle unit. The pulley module II-II-I is located at the upper right front side, the pulley module II-II-II is located at the lower left front side, the pulley module II-II-III is located at the upper right rear side, and the pulley module II-II-IV is located at the lower left rear side.

[0013] Preferably, the number of pulleys in the pulley module I is greater than or equal to four, and the traction rope I is wound reciprocally when continuously passing through the pulley modules I of two adjacent unit bodies.

[0014] Preferably, the number of pulleys in the pulley module II is greater than or equal to two, and the traction rope II is wound reciprocally when continuously passing through the pulley modules II of two adjacent unit bodies.

[0015] Preferably, the end unit I is provided with a hinge joint I-I-I on the upper right side, the middle unit is provided with a hinge joint II-II-I on the upper left side and a hinge joint II-I-I on the lower right side, and the end unit II is provided with a hinge joint III-II-I on the upper left side. The hinge joint I-I-I is connected to the hinge joint II-II-I, and the hinge joint II-I-I is connected to the hinge joint III-II-I.

[0016] Preferably, the end unit I, the middle unit, and the end unit II include a connecting rod assembly forming a long rigid body. The track member includes track member I and track member II provided above and below the front side of the connecting rod assembly, and track member III and track member IV provided above and below the rear side of the connecting rod assembly.

[0017] Compared with the above-mentioned background art, the foldable chain track provided by the present invention is composed of a plurality of unit bodies hinged together, and successively includes an end unit body I, several intermediate unit bodies, and an end unit body II. Pulley modules I are provided on the upper and lower sides of the end unit body I, the upper and lower sides of the intermediate unit bodies, and the upper and lower sides of the end unit body II. Pulley modules II are provided on the front side and / or the rear side of the end unit body I, the front side and / or the rear side of the intermediate unit bodies, and the front side and / or the rear side of the end unit body II. The end unit body I, the intermediate unit bodies, and the end unit body II are provided with track members. The pulley modules I on the upper sides of the end unit body I and the end unit body II are for connecting the suspension ropes. The pulley modules I on the lower sides of the end unit body I and the end unit body II and the pulley modules I of the intermediate unit bodies are for connecting the traction rope I. The pulley modules II of the end unit body I, the intermediate unit bodies, and the end unit body II are for connecting the traction rope II.

[0018] This foldable chain track has three forms: a folded shape, a U-shaped curve shape, and a straight shape. When the traction rope I and the traction rope II are relaxed, the foldable chain track is in a curved state. When the traction rope I is relaxed and the traction rope II is tightened, the foldable chain track is in a folded state. When the traction rope I is tightened and the traction rope II is relaxed, the foldable chain track is in a straight state and the track members are spliced on the same straight line. When the foldable chain track is in the folded state, its length dimension can be greatly reduced, which is convenient for transportation, deployment, and recovery, and can adapt to most situations where the distance from the bottom surface of the bridge to the ground or water surface under the bridge is less than the length of the track during the construction and recovery processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0020] Figure 1 It is a schematic structural diagram of the foldable chain track provided by the embodiment of the present invention;

[0021] Figure 2 For Figure 1 It is a schematic structural diagram of the end unit body I;

[0022] Figure 3 For Figure 2 It is a plan view of

[0023] Figure 4 For Figure 1 It is a schematic structural diagram of the intermediate unit body;

[0024] Figure 5 For Figure 4Schematic plan view;

[0025] Figure 6 is Figure 1 Schematic structural view of end unit II;

[0026] Figure 7 is Figure 6 Schematic plan view;

[0027] Figure 8 Schematic connection view of hinge joint I and hinge joint II provided by the embodiment of the present invention;

[0028] Figure 9 Schematic structural view of pulley module I provided by the embodiment of the present invention;

[0029] Figure 10 Schematic structural view of pulley module II provided by the embodiment of the present invention;

[0030] Figure 11 First installation schematic view of the foldable chain track provided by the embodiment of the present invention;

[0031] Figure 12 Second installation schematic view of the foldable chain track provided by the embodiment of the present invention;

[0032] Figure 13 Third installation schematic view of the foldable chain track provided by the embodiment of the present invention;

[0033] Figure 14 Schematic view of single-sided suspension of the foldable chain track in the folded state provided by the embodiment of the present invention;

[0034] Figure 15 Schematic view of double-sided suspension of the foldable chain track in the folded state provided by the embodiment of the present invention;

[0035] Figure 16 Schematic view of double-sided suspension of the foldable chain track in the curved state provided by the embodiment of the present invention;

[0036] Figure 17 Schematic view of double-sided suspension of the foldable chain track in the straight state provided by the embodiment of the present invention.

[0037] Wherein:

[0038] 00 - Bridge, 10 - End unit I, 11 - End unit II, 12 - Intermediate unit, 100 - Link assembly I, 111 - Hoisting module I-I-I, 112 - Hoisting module I-I-II, 113 - Hoisting module I-II-I, 114 - Hoisting module I-II-II, 121 - Pulley module I-I-I, 122 - Pulley module I-I-II, 123 - Pulley module I-I-III, 131 - Pulley module I-II-I, 132 - Pulley module I-II-II, 133 - Pulley module I-II-III, 134 - Pulley module I-II-IV, 141 - Track part I-I, 142 - Track part I-II, 143 - Track part I-III, 144 - Track part I-IV, 151 - Hinge joint I-I-I, 200 - Link assembly II, 221 - Pulley module II-I-I, 222 - Pulley module II-I-II, 231 - Pulley module II-II-I, 232 - Pulley module II-II-II, 233 - Pulley module II-II-III, 234 - Pulley module II-II-IV, 241 - Track part II-I, 242 - Track part II-II, 243 - Track part II-III, 244 - Track part II-IV, 251 - Hinge joint II-I-I, 261 - Hinge joint II-II-I, 300 - Link assembly III, 311 - Hoisting module III-I-I, 312 - Hoisting module III-I-II, 313 - Hoisting module III-II-I, 314 - Hoisting module III-II-II, 321 - Pulley module III-I-I, 322 - Pulley module III-I-II, 323 - Pulley module III-I-III, 331 - Pulley module III-II-I, 332 - Pulley module III-II-II, 333 - Pulley module III-II-III, 334 - Pulley module III-II-IV, 341 - Track part III-I, 342 - Track part III-II, 343 - Track part III-III, 344 - Track part III-IV, 361 - Hinge joint III-II-I, 411 - Towing rope I-I, 412 - Towing rope I-II, 421 - Towing rope II-I, 422 - Towing rope II-II, 431 - Suspension rope I-I, 432 - Suspension rope I-II, 441 - Suspension rope II-I, 442 - Suspension rope II-II, 1201 - Intermediate unit I, 1202 - Intermediate unit II, 1203 - Intermediate unit III, 1204 - Intermediate unit IV, 2000 - Pulley shaft I-I, 2010 - Pulley I-I, 2020 - Pulley I-II, 2030 - Pulley I-III, 2040 - Pulley I-IV, 2050 - Crossbeam, 2060 - Support frame, 3000 - Pulley shaft II-I, 3010 - Pulley II-I,3020 - Pulley II-II, 3030 - Pulley Cover II-I, 3031 - Restraining Teeth II-I, 3040 - Pulley Cover II-II, 5000 - Hinge Joint I, 5010 - Hinge Pin, 6000 - Hinge Joint II, 10001 - Hinge I, 11001 - Hinge V, 12011 - Hinge II, 12021 - Hinge III, 12031 - Hinge IV. Detailed Implementation Manner

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In order to enable those skilled in the art in this technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0041] Please refer to Figures 1 to 17 , where Figure 1 is the structural schematic diagram of the foldable chain track provided by the embodiment of the present invention, Figure 2 is Figure 1 the structural schematic diagram of End Unit I, Figure 3 is Figure 2 the plan schematic diagram of Figure 4 is Figure 1 the structural schematic diagram of the middle unit, Figure 5 is Figure 4 the plan schematic diagram of Figure 6 is Figure 1 the structural schematic diagram of End Unit II, Figure 7 is Figure 6 the plan schematic diagram of Figure 8 is the connection schematic diagram of Hinge Joint I and Hinge Joint II provided by the embodiment of the present invention, Figure 9 is the structural schematic diagram of Pulley Module I provided by the embodiment of the present invention, Figure 10 the structural schematic diagram of Pulley Module II provided by the embodiment of the present invention, Figure 11 is the first installation schematic diagram of the foldable chain track provided by the embodiment of the present invention, Figure 12 is the second installation schematic diagram of the foldable chain track provided by the embodiment of the present invention, Figure 13 is the third installation schematic diagram of the foldable chain track provided by the embodiment of the present invention, Figure 14 is the unilateral suspension schematic diagram of the foldable chain track provided by the embodiment of the present invention in the folded state, Figure 15Schematic diagram of bilateral suspension of the foldable chain track provided by the embodiment of the present invention in the folded state Figure 16 Schematic diagram of bilateral suspension of the foldable chain track provided by the embodiment of the present invention in the curved state Figure 17 Schematic diagram of bilateral suspension of the foldable chain track provided by the embodiment of the present invention in the straight state

[0042] In the first specific embodiment, the foldable chain track provided by the present invention is composed of a plurality of unit bodies hinged together, successively including an end unit body I10, a plurality of intermediate unit bodies 12 and an end unit body II11. The number of intermediate unit bodies 12 is greater than or equal to zero, and the number can be increased or decreased according to the width of different bridges 00.

[0043] Pulley modules I are provided on both the upper and lower sides of any unit body. That is to say, pulley modules I are provided on the upper and lower sides of the end unit body I10, the upper and lower sides of the intermediate unit bodies 12, and the upper and lower sides of the end unit body II11; pulley modules II are provided on the front side and / or the rear side of any unit body. That is to say, pulley modules II are provided on the front side and / or the rear side of the end unit body I10, the front side and / or the rear side of the intermediate unit bodies 12, and the front side and / or the rear side of the end unit body II11; any unit body is provided with a track member. That is to say, the end unit body I10, the intermediate unit bodies 12 and the end unit body II11 are provided with track members. The pulley modules I on the upper side of the end unit body I10 and the pulley modules I on the upper side of the end unit body II11 are for connecting the suspension ropes. The pulley modules I on the lower side of the end unit body I10, the pulley modules I on the lower side of the end unit body II11, and the pulley modules I of the intermediate unit bodies 12 are for connecting the towing rope I. The pulley modules II of the end unit body I10, the intermediate unit bodies 12, and the end unit body II11 are for connecting the towing rope II.

[0044] In this embodiment, when the towing rope I and the towing rope II are relaxed, the foldable chain track is in a curved state. When the towing rope I is relaxed and the towing rope II is tightened, the foldable chain track is in a folded state. When the towing rope I is tightened and the towing rope II is relaxed, the foldable chain track is in a straight state and the track members are spliced in the same straight line.

[0045] The foldable chain track is strip-shaped and is spliced by a plurality of rigid short strip-shaped track unit bodies. The adjacent track unit bodies are connected in a hinge manner. The rotation range of each hinge is 0° to 180°, and the rotatable directions of two adjacent hinges are opposite. It has three forms: a folded shape, a U-shaped curved shape and a straight shape. When in the folded state, its length dimension can be greatly reduced, which is convenient for transportation, delivery and recovery, and can adapt to most situations where the distance from the bottom surface of the bridge to the ground or water surface under the bridge is less than the length of the track during the construction and recovery processes.

[0046] Further, a hoisting module is adopted to drive the towing ropes. The end unit I 10 and / or the end unit II 11 are / is provided with a hoisting module I that connects and drives the towing rope I, and / or, the end unit I 10 and / or the end unit II 11 are / is provided with a hoisting module II that connects and drives the towing rope II. The hoisting module I and the hoisting module II are output modules for rotational motion and power, and both include a rotational power module and a drum, and can wind and release the ropes.

[0047] Furthermore, multiple groups of the hoisting module I and the hoisting module II can be set. The hoisting module I includes a hoisting module I-I provided in the end unit I 10 and a hoisting module III-I provided in the end unit II 11. The hoisting module II includes a hoisting module I-II provided in the end unit I 10 and a hoisting module III-II provided in the end unit II 11. Both ends of the towing rope I are connected to the hoisting module I-I and the hoisting module III-I, and both ends of the towing rope II are connected to the hoisting module I-II and the hoisting module III-II.

[0048] In this embodiment, one end of the towing rope I is fixed on the drum of the hoisting module I of the end unit body I10 at the leftmost end, and then passes through the pulley module I under each unit body in sequence to the right, and the other end is fixed on the drum of the hoisting module I of the end unit body II11 at the rightmost end; one end of the towing rope II is fixed on the drum of the hoisting module II of the end unit body I10 at the leftmost end, and then passes through the pulley module II in front of or behind each unit body in sequence to the right, and the other end is fixed on the drum of the hoisting module II of the end unit body II11 at the rightmost end. Suspension ropes are respectively arranged on the end unit body I10 at the leftmost end and the end unit body II11 at the rightmost end. By controlling the hoisting module II to reel in the towing rope II, the initial state of the chain track is in a zigzag folded shape, and the folded chain track is suspended on one side of the bridge 00 by the left (or right) suspension rope. The drone is used to tow the right (or left) suspension rope to the other side of the bridge 00. Then, the right (or left) suspension rope is towed and the left (or right) suspension rope is released simultaneously to move the folded chain track to the middle position in the width direction of the bridge bottom; then, by controlling the hoisting module II to release the towing rope II, the folded chain track turns into a U-shaped curve under the action of gravity; then, by controlling the hoisting module I to reel in the towing rope I, the U-shaped curve chain track turns into a straight line; a number of track members are arranged on each unit body. When the chain track turns into a straight line, the track members in each unit body can be sequentially spliced into a complete straight track for the mobile inspection platform to pass through; the recovery process of the track is the reverse process of the track construction process. First, by controlling the hoisting module I, the chain track is changed from a straight line into a U-shaped curve, and then by controlling the hoisting module II, the chain track is changed from a U-shaped curve into a zigzag folded shape. Then, the folded chain track is moved to one side of the bridge 00 by simultaneously releasing one suspension rope and reeling in the other suspension rope. Finally, the folded chain track is recovered to the upper side of the bridge 00 through the suspension rope. The foldable chain track is controlled by several hoisting modules to realize the transformation of its three forms, avoiding on-site construction and disassembly and improving the inspection efficiency.

[0049] On this basis, the hoisting modules I-I, III-I in each group, and the hoisting modules I-II, III-II can be further set. The hoisting module I-I includes the hoisting module I-I-I111 and the hoisting module I-I-II112. The hoisting module III-I includes the hoisting module III-I-I311 and the hoisting module III-I-II312. The hoisting module I-II includes the hoisting module I-II-I113 and the hoisting module I-II-II114. The hoisting module III-II includes the hoisting module III-II-I313 and the hoisting module III-II-II314. The traction rope I includes the traction rope I-I411 connecting the hoisting module I-I-I111 and the hoisting module III-I-I311, and the traction rope I-II412 connecting the hoisting module I-I-II112 and the hoisting module III-I-II312. The traction rope II includes the traction rope II-I421 connecting the hoisting module I-II-I113 and the hoisting module III-II-I313, and the traction rope II-II422 connecting the hoisting module I-II-II114 and the hoisting module III-II-II314. The traction rope I-I411 and the traction rope I-II412 are located on the lower side, and the traction rope II-I421 and the traction rope II-II422 are located on the front and back sides.

[0050] Among them, a pair of suspension ropes are connected to the end unit I10 and the end unit II11. The suspension ropes include the suspension rope I and the suspension rope II. The pulley module I includes: the pulley module I-I-I121, the pulley module I-I-II122, and the pulley module I-I-III123 provided on the end unit I10. The pulley module I-I-II122 and the pulley module I-I-I121 are located on the lower left and right sides, and the pulley module I-I-III123 is located on the upper left side and is connected to the suspension rope I. The pulley module III-I-I321, the pulley module III-I-II322, and the pulley module III-I-III323 provided on the end unit II11. The pulley module III-I-I321 and the pulley module III-I-II322 are located on the lower left and right sides, and the pulley module III-I-III323 is located on the upper right side and is connected to the suspension rope II. The pulley module II-I-I221 and the pulley module II-I-II222 provided on the intermediate unit 12. The pulley module II-I-I221 is located on the lower left side, and the pulley module II-I-II222 is located on the upper right side.

[0051] In this embodiment, the hoisting module I-I-I111 and the hoisting module III-I-I311 are the hoisting modules I installed on the front side, and the hoisting module I-I-II112 and the hoisting module III-I-II312 are the hoisting modules I installed on the rear side. The pulley module I-I-II122 is the pulley module I installed at the lower left end of the end unit I10, and the pulley module I-I-I121 is the pulley module I installed at the lower right end of the end unit I10. The pulley module III-I-I321 is the pulley module I installed at the lower left end of the end unit II11, and the pulley module III-I-II322 is the pulley module I installed at the lower right end of the end unit II11.

[0052] Specifically, the number of the traction ropes I is 2. One end of the traction rope I-I411 is fixed on the drum of the hoisting module I on the front side of the end unit I10, and sequentially passes through the pulley module I at the lower left end of the end unit I10, the pulley module I at the lower right end of the end unit I10, the pulley module I at the lower left end and / or the pulley module I at the upper right end of the middle unit 12 (the structures of the middle units 12 are the same. When the number of the middle units 12 is greater than two, the second middle unit 12 is flipped 180° and then connected to the first middle unit 12, and the subsequent middle units 12 are the same. At this time, it first passes through the pulley module I at the lower left end of the first middle unit 12, and then passes through the pulley module I at the upper right end of the second middle unit 12. Here, the upper right end is relative to the position before flipping), the pulley module I at the lower left end of the end unit II11, and the pulley module I at the lower right end of the end unit II11, and then the other end is fixed on the drum of the hoisting module I on the front side of the end unit II11; one end of the traction rope I-II412 is fixed on the drum of the hoisting module I on the rear side of the end unit I10, and sequentially passes through the pulley module I at the lower left end of the end unit I10, the pulley module I at the lower right end of the end unit I10, the pulley module I at the lower left end and / or the pulley module I at the upper right end of the middle unit 12, the pulley module I at the lower left end of the end unit II11, and the pulley module I at the lower right end of the end unit II11, and then the other end is fixed on the drum of the hoisting module I on the rear side of the end unit II11.

[0053] In a specific embodiment, the pulley module II includes: the pulley module I-II-I131, pulley module I-II-II132, pulley module I-II-III133, and pulley module I-II-IV134 provided on the end unit I10. The pulley module I-II-I131 is located in the upper left of the front side, the pulley module I-II-II132 is located in the lower right of the front side, the pulley module I-II-III133 is located in the upper left of the rear side, and the pulley module I-II-IV134 is located in the lower right of the rear side; the pulley module III-II-I331, pulley module III-II-II332, pulley module III-II-III333, and pulley module III-II-IV334 provided on the end unit II11. The pulley module III-II-I331 is located in the upper right of the front side, the pulley module III-II-II332 is located in the lower left of the front side, the pulley module III-II-III333 is located in the upper right of the rear side, and the pulley module III-II-IV334 is located in the lower left of the rear side; the pulley module II-II-I231, pulley module II-II-II232, pulley module II-II-III233, and pulley module II-II-IV234 provided on the middle unit 12. The pulley module II-II-I231 is located in the upper right of the front side, the pulley module II-II-II232 is located in the lower left of the front side, the pulley module II-II-III233 is located in the upper right of the rear side, and the pulley module II-II-IV234 is located in the lower left of the rear side.

[0054] In this embodiment, the pulley module I-II-I131 and the pulley module I-II-II132 are two pulley modules II installed on the front side, and the pulley module I-II-III133 and the pulley module I-II-IV134 are two pulley modules II installed on the rear side. The pulley module II-II-I231 and the pulley module II-II-II232 are two pulley modules II installed on the front side, and the pulley module II-II-III233 and the pulley module II-II-IV234 are two pulley modules II installed on the rear side. The pulley module III-II-I331 and the pulley module III-II-II332 are two pulley modules II installed on the front side, and the pulley module III-II-III333 and the pulley module III-II-IV334 are two pulley modules II installed on the rear side.

[0055] Specifically, the number of the traction ropes II is 2. One end of the traction rope II-I 421 is fixed on the drum of the winch module II on the front side of the end unit I 10, and successively passes through two pulley modules II on the front side of the end unit I 10, two pulley modules II on the front side and / or the rear side of the middle unit 12 (the structures of the middle units 12 are the same. When the number of the middle units 12 is greater than two, the second middle unit 12 is turned over 180° and connected to the first middle unit 12, and the same applies to the subsequent middle units 12. At this time, it first passes through two pulley modules II on the front side of the first middle unit 12, and then passes through two pulley modules II on the rear side of the second middle unit 12. Here, the rear side is in terms of the position before turning over), and two pulley modules II on the front side of the end unit II 11 in a certain rope winding order, and the other end is fixed on the drum of the winch module II on the front side of the end unit II 11; one end of the traction rope II-II 422 is fixed on the drum of the winch module II on the rear side of the end unit I 10, and successively passes through two pulley modules II on the rear side of the end unit I 10, two pulley modules II on the rear side or the front side of the middle unit 12, and two pulley modules II on the rear side of the end unit II 11 in a certain rope winding order, and the other end is fixed on the drum of the winch module II on the rear side of the end unit II 11.

[0056] Among them, the pulley module I is provided with a support frame 2060, a pulley shaft I-I 2000 and pulleys; the number of the pulleys is a positive integer greater than or equal to 4, preferably within 10, and the pulleys are coaxially installed on the support frame 2060 through the pulley shaft I-I 2000, including a pulley I-I 2010, a pulley I-II 2020, a pulley I-III 2030 and a pulley I-IV 2040.

[0057] Specifically, the pulley module I includes a support frame 2060, a pulley shaft I-I 2000 and pulleys. The number of the pulleys is 4, and they are coaxially installed on the support frame 2060 through the pulley shaft I-I 2000; the pulley I-I 2010 (the first pulley) and the pulley I-II 2020 (the second pulley) are a group and are installed at a position to the right of the pulley shaft I-I 2000; the pulley I-III 2030 (the third pulley) and the pulley I-IV 2040 (the fourth pulley) are a group and are installed at a position to the left of the pulley shaft I-I 2000; the outer edge of the pulley is provided with a groove for restraining the rope, and each pulley can rotate independently; the support frame 2060 is provided with a cross beam 2050 to prevent the rope from disengaging from the pulley groove.

[0058] The pulley module II is provided with a pulley shaft II-I3000, pulleys and pulley covers; the number of pulleys is a positive integer greater than or equal to 2, preferably within 4, and the pulleys are coaxially mounted on the pulley shaft II-I3000, including pulley II-I3010 and pulley II-II3020; the number of pulley covers is equal to the number of pulleys, and each pulley cover is independently mounted in cooperation with a pulley on the pulley shaft II-I3000, including pulley cover II-I3030 and pulley cover II-II3040; the outer edge of the pulley is provided with a groove for restraining the rope, and each pulley can rotate independently; the pulley cover is provided with restraining teeth, such as the pulley cover II-I3030 is provided with restraining teeth II-I3031, and the rope is restricted in the pulley groove through the restraining teeth to prevent the rope from disengaging from the pulley groove.

[0059] Specifically, the pulley module II includes a pulley shaft II-I3000, pulleys and pulley covers; the number of pulleys is 2, and they are coaxially mounted on the pulley shaft II-I3000; the number of pulley covers is 2, and they are coaxially mounted on the pulley shaft II-I3000. The pulley cover II-I3030 (the first pulley cover) is mounted on the side close to the pulley II-I3010 (the first pulley), and the pulley cover II-II3040 (the second pulley cover) is mounted on the side close to the pulley II-II3020 (the second pulley).

[0060] Exemplarily, the number of pulleys in the pulley module I is greater than or equal to four. When the towing rope I continuously passes through the pulley modules I of adjacent two unit bodies, multiple reciprocating windings are adopted according to the number of pulleys in the pulley module I.

[0061] Specifically, the winding path of the towing rope I-I411 is as follows: the drum of the hoisting module I-I-I111 of the end unit I10 → the first pulley of the pulley module I-I-II122 of the end unit I10 → the first pulley of the pulley module I-I-I121 of the end unit I10 → the fourth pulley of the pulley module II-I-I221 of the intermediate unit I1201 → the second pulley of the pulley module I-I-I121 of the end unit I10 → the third pulley of the pulley module II-I-I221 of the intermediate unit I1201 → the second pulley of the pulley module II-I-II222 of the intermediate unit II1202 → the third pulley of the pulley module II-I-I221 of the intermediate unit III1203 → the first pulley of the pulley module II-I-II222 of the intermediate unit II1202 → the fourth pulley of the pulley module II-I-I221 of the intermediate unit III1203 → the first pulley of the pulley module II-I-II222 of the intermediate unit IV1204 → the fourth pulley of the pulley module III-I-I321 of the end unit II11 → the second pulley of the pulley module II-I-II222 of the intermediate unit IV1204 → the third pulley of the pulley module III-I-I321 of the end unit II11 → the third pulley of the pulley module III-I-II322 of the end unit II11 → the drum of the hoisting module III-I-I311 of the end unit II11; the winding path of the towing rope I-II412 is symmetric to the winding path of the towing rope I-I411 with respect to the front and rear neutral symmetry plane of the unit (including the end unit I10 or the intermediate unit 12 or the end unit II11).

[0062] Exemplarily, the number of pulleys in the pulley module II is greater than or equal to two. When the towing rope II continuously passes through the pulley modules II of adjacent two units, multiple reciprocating windings are adopted according to the number of pulleys in the pulley module II.

[0063] Specifically, the winding path of the towing rope II-I421 is as follows: the reel of the hoisting module I-II-I113 of the end unit I10 → the second pulley of the pulley module I-II-II132 of the end unit I10 → the second pulley of the pulley module I-II-I131 of the end unit I10 → the second pulley of the pulley module II-II-I231 of the intermediate unit I1201 → the first pulley of the pulley module I-II-I131 of the end unit I10 → the first pulley of the pulley module II-II-I231 of the intermediate unit I1201 → the first pulley of the pulley module II-II-II232 of the intermediate unit I1201 → the first pulley of the pulley module II-II-III233 of the intermediate unit II1202 → the second pulley of the pulley module II-II-II232 of the intermediate unit I1201 → the second pulley of the pulley module II-II-III233 of the intermediate unit II1202 → the second pulley of the pulley module II-II-IV234 of the intermediate unit II1202 → the second pulley of the pulley module II-II-I231 of the intermediate unit III1203 → the first pulley of the pulley module II-II-IV234 of the intermediate unit II1202 → the first pulley of the pulley module II-II-I231 of the intermediate unit III1203 → the first pulley of the pulley module II-II-II232 of the intermediate unit III1203 → the first pulley of the pulley module II-II-III233 of the intermediate unit IV1204 → the second pulley of the pulley module II-II-II232 of the intermediate unit III1203 → the second pulley of the pulley module II-II-III233 of the intermediate unit IV1204 → the second pulley of the pulley module II-II-IV234 of the intermediate unit IV1204 → the second pulley of the pulley module III-II-I331 of the end unit II11 → the first pulley of the pulley module II-II-IV234 of the intermediate unit IV1204 → the first pulley of the pulley module III-II-I331 of the end unit II11 → the first pulley of the pulley module III-II-II332 of the end unit II11 → the reel of the hoisting module III-II-I313 of the end unit II11; the winding path of the towing rope II-II422 is symmetric with respect to the front-back neutral symmetry plane of the unit (including the end unit I10 or the intermediate unit 12 or the end unit II11) and the winding path of the towing rope II-I421.

[0064] In this embodiment, the number of suspension ropes is 4. The suspension rope I includes suspension rope I-I431 and suspension rope I-II432, which are respectively sleeved in the pulleys of the pulley module I at the upper left end of the end unit I10; the suspension rope II includes suspension rope II-I441 and suspension rope II-II442, which are respectively sleeved in the pulleys of the pulley module I at the upper right end of the end unit II11. The chain track is suspended by four suspension ropes. When the traction rope I is not under tension or under a small tension and the traction rope II is under a large enough tension, all the hinge structures of the chain track are in the 180° or -180° position, and the chain track is in a folded state; when the traction rope I is not under tension or under a small tension and the traction rope II is also not under tension or under a small tension, the chain track is in a curved state under the action of gravity; when the traction rope I is under a large enough tension and the traction rope II is not under tension or under a small tension, all the hinge structures of the chain track are in the 0° position, and the chain track is in a straight state; when all the hinge structures of the chain track are in the 0° position, that is, when the chain track is in a straight state, the track members of each unit are spliced into a continuous straight track.

[0065] In the method for building and recycling the foldable chain track:

[0066] The first step: The folded chain track is suspended on one side of the bridge 00 through the suspension rope II-I441 and suspension rope II-II442 of the end unit II11. The suspension rope I-I431 and suspension rope I-II432 of the end unit I10 are connected to the unmanned aerial vehicle, and the unmanned aerial vehicle takes it to the other side of the bridge 00.

[0067] The second step: Release the suspension rope II-I441 and suspension rope II-II442 simultaneously, and reel in the suspension rope I-I431 and suspension rope I-II432, so that the folded chain track moves to the middle position in the width direction of the bridge bottom.

[0068] The third step: Control the hoisting module II of the end unit I10 and the hoisting module II of the end unit II11, and release the traction rope II-I421 and traction rope II-II422. The folded chain track unfolds into a curved state under the action of gravity.

[0069] The fourth step: Control the hoisting module I of the end unit I10 and the hoisting module I of the end unit II11, and reel in the traction rope I-I411 and traction rope I-II412. The chain track in the curved state gradually changes to a straight state. At this time, the track members between adjacent units are spliced together to form a complete track for the mobile inspection platform to pass through.

[0070] The recovery process of the chain track is the reverse of the erection process, that is, controlling the hoisting module I of the end unit I10 and the hoisting module I of the end unit II11, releasing the towing rope I-I411 and the towing rope I-II412, and the chain track in a straight state turns into a curved state under the action of gravity; then by controlling the hoisting module II of the end unit I10 and the hoisting module II of the end unit II11, retracting the towing rope II-I421 and the towing rope II-II422, so that the chain track in a curved state returns to the folded state; in the next step, simultaneously retracting the suspension ropes II-I441 and II-II442, and releasing the suspension ropes I-I431 and I-II432, so that the chain track in the folded state returns from the middle position in the width direction of the bridge bottom to one side of the bridge 00, and finally recovering the chain track in the folded state to the upper side of the bridge 00 through the suspension ropes II-I441 and II-II442 of the end unit II11.

[0071] In a specific embodiment, the end unit I10 is provided with a hinge joint I-I-I151 on the upper right side, the middle unit 12 is provided with a hinge joint II-II-I261 on the upper left side and a hinge joint II-I-I251 on the lower right side, and the end unit II11 is provided with a hinge joint III-II-I361 on the upper left side. The hinge joint I-I-I151 is connected to the hinge joint II-II-I261, and the hinge joint II-I-I251 is connected to the hinge joint III-II-I361.

[0072] Specifically, the end unit I10, the middle unit 12 and the end unit II11 include a link assembly that forms a long rigid body. The track members include track member I and track member II provided above and below the front side of the link assembly, and track member III and track member IV provided above and below the rear side of the link assembly.

[0073] In this embodiment, the hinge joint I5000 and the hinge joint II6000 can be combined into a hinge structure that can freely rotate a certain angle through the hinge pin 5010.

[0074] The end unit I10 includes a connecting rod assembly I100, a hinge joint I5000, a pulley module I, a pulley module II, a hoisting module I, a hoisting module II, and a track member; the connecting rod assembly I100 is a long rigid body, and the hinge joint I-I-I151 (hinge joint I5000) is fixed to the upper right end of the connecting rod assembly I100. The pulley modules I-I-I121, I-I-II122, and I-I-III123 (the pulley module I with a quantity of 3) are respectively fixed to the lower right end, lower left end, and upper left end of the lower side of the connecting rod assembly I100. The pulley modules I-II-I131, I-II-II132, I-II-III133, and I-II-IV134 (the pulley module II with a quantity of 4) are respectively fixed to the positions slightly above the middle, slightly below the middle, slightly above the middle, and slightly below the middle of the front side of the connecting rod assembly I100. The hoisting modules I-I-I111 and I-I-II112 (the hoisting module I with a quantity of 2) are respectively fixed to the left end of the front side and the left end of the rear side of the connecting rod assembly I100. The hoisting modules I-II-I113 and I-II-II114 (the hoisting module II with a quantity of 2) are respectively fixed to the left end of the front side and the left end of the rear side of the connecting rod assembly I100; the track members I-I141, I-II142, I-III143, and I-IV144 (4 tracks) are respectively fixed to the positions slightly above the front side, slightly below the front side, slightly above the rear side, and slightly below the rear side of the connecting rod assembly I100, and the 4 tracks are parallel to each other.

[0075] The middle unit 12 includes a connecting rod assembly II200, a hinge joint I5000, a hinge joint II6000, a pulley module I, a pulley module II, and a track member; the connecting rod assembly II200 is a long rigid body, the hinge joint II-I-I251 (hinge joint I5000) is fixed to the lower right end of the connecting rod assembly II200, and the hinge joint II-II-I261 (hinge joint II6000) is fixed to the upper left end of the connecting rod assembly. The pulley modules II-I-I221 and II-I-II222 (the pulley module I with a quantity of 2) are respectively fixed to the lower left end and the upper right end of the lower side of the connecting rod assembly II200. The pulley modules II-II-I231, II-II-II232, II-II-III233, and II-II-IV234 (the pulley module II with a quantity of 4) are respectively fixed to the positions slightly above the middle, slightly below the middle, slightly above the middle, and slightly below the middle of the front side of the connecting rod assembly II200. The track members II-I241, II-II242, II-III243, and II-IV244 (4 tracks) are respectively fixed to the positions slightly above the front side, slightly below the front side, slightly above the rear side, and slightly below the rear side of the connecting rod assembly II200, and the 4 tracks are parallel to each other.

[0076] The end unit II11 includes a link assembly III300, a hinge joint II6000, a pulley module I, a pulley module II, a hoisting module I, a hoisting module II, and a track member; the link assembly III300 is a long rigid body, and the hinge joint III-II-I361 (hinge joint II6000) is fixed to the upper left end of the link assembly II200. The pulley modules III-I-I321, III-I-II322, and III-I-III323 (the pulley module I with a quantity of 3) are respectively fixed to the lower left end, lower right end, and upper right end of the link assembly III300. The pulley modules III-II-I331, III-II-II332, III-II-III333, and III-II-IV334 (the pulley module II with a quantity of 4) are respectively fixed to the positions slightly above the middle, slightly below the middle, slightly above the middle, and slightly below the middle on the front side of the link assembly III300. The hoisting modules III-I-I311 and III-I-II312 (the hoisting module I with a quantity of 2) are respectively fixed to the right end of the front side and the right end of the rear side of the link assembly III300. The hoisting modules III-II-I313 and III-II-II314 (the hoisting module II with a quantity of 2) are respectively fixed to the right end of the front side and the right end of the rear side of the link assembly III300; the track members III-I341, III-II342, III-III343, and III-IV344 (the tracks with a quantity of 4) are respectively fixed to the positions slightly above the front side, slightly below the front side, slightly above the rear side, and slightly below the rear side of the link assembly III300, and the 4 tracks are parallel to each other.

[0077] Taking the quantity of the middle units 12 as four as an example, it includes the middle unit I1201, the middle unit II1202, the middle unit III1203, and the middle unit IV1204. The hinge points of the end unit I10, the middle unit I1201, the middle unit II1202, the middle unit III1203, the middle unit IV1204, and the end unit II11 are the hinge I10001, the hinge II12011, the hinge III12021, the hinge IV12031, and the hinge V11001. The rotatable angle of each hinge structure is 0° to 180°, and the rotation directions of adjacent two hinges are opposite, that is, the rotation angle of the first hinge is 0° to 180°, the rotation angle of the second hinge is 0° to -180°, the rotation angle of the third hinge is 0° to 180°, the rotation angle of the fourth hinge is 0° to -180°, and the rotation angle of the fifth hinge is 0° to 180°.

[0078] In this embodiment, a specific erection and recovery process is given:

[0079] The chain track is initially in a folded state, that is, the hinge I10001 (the first hinge) is at the 180° position, the hinge II12011 (the second hinge) is at the -180° position, the hinge III12021 (the third hinge) is at the 180° position, the hinge IV12031 (the fourth hinge) is at the -180° position, the hinge V11001 (the fifth hinge) is at the 180° position. The towing ropes II-I421 and II-II422 are in a stressed state under the combined action of the hoisting module II of the end unit I10 and the hoisting module II of the end unit II11, while the towing ropes I-I411 and I-II412 are not affected by the hoisting module I of the end unit I10 and the hoisting module I of the end unit II11 and are in a slack state;

[0080] In the first step, the folded chain track is suspended on one side of the bridge 00 through the suspension ropes II-I441 and II-II442 of the end unit II11. The suspension ropes I-I431 and I-II432 of the end unit I10 are connected to the unmanned aerial vehicle, and the unmanned aerial vehicle takes it to the other side of the bridge 00, as Figure 14 ;

[0081] In the second step, the suspension ropes II-I441, II-II442 are released simultaneously, and the suspension ropes I-I431, I-II432 are wound up, so that the folded chain track moves to the middle position in the width direction of the bridge bottom, as Figure 15 ;

[0082] In the third step, the hoisting module II of the end unit I10 and the hoisting module II of the end unit II11 are controlled to release the towing ropes II-I421 and II-II422. The folded chain track unfolds into a curved state under the action of gravity, as Figure 16 ;

[0083] Step 4: Control the hoisting module I of the end unit I10 and the hoisting module I of the end unit II11 to wind up the towing ropes I-I411 and I-II412, so that the chain track in the curved state is gradually transformed into a straight state. At this time, the track members between adjacent units (including the end unit I10, the intermediate unit 12, and the end unit II11) are spliced together to form a complete track for the mobile inspection platform to pass through. That is, the track member I-I141 of the end unit I10 is sequentially spliced with the track member II-I241 of the intermediate unit I1201, the track member II-IV244 of the intermediate unit II1202, the track member II-I241 of the intermediate unit III1203, the track member II-IV244 of the intermediate unit IV1204, and the track member III-I341 of the end unit II11 to form a straight track; the track member I-II142 of the end unit I10 is sequentially spliced with the track member II-II242 of the intermediate unit I1201, the track member II-III243 of the intermediate unit II1202, the track member II-II242 of the intermediate unit III1203, the track member II-III243 of the intermediate unit IV1204, and the track member III-II342 of the end unit II11 to form a straight track; the track member I-III143 of the end unit I10 is sequentially spliced with the track member II-III243 of the intermediate unit I1201, the track member II-II242 of the intermediate unit II1202, the track member II-III243 of the intermediate unit III1203, the track member II-II242 of the intermediate unit IV1204, and the track member III-III343 of the end unit II11 to form a straight track; the track member I-IV144 of the end unit I10 is sequentially spliced with the track member II-IV244 of the intermediate unit I1201, the track member II-I241 of the intermediate unit II1202, the track member II-IV244 of the intermediate unit III1203, the track member II-I241 of the intermediate unit IV1204, and the track member III-IV344 of the end unit II11 to form a straight track, as Figure 17 ;

[0084] The recovery process of the chain track is the reverse process of the erection process, that is, controlling the hoisting module I of the end unit I10 and the hoisting module I of the end unit II11, releasing the towing rope I-I411 and the towing rope I-II412, and the chain track in the straight state turns into a curved state under the action of gravity; then by controlling the hoisting module II of the end unit I10 and the hoisting module II of the end unit II11, winding up the towing rope II-I421 and the towing rope II-II422, so that the chain track in the curved state returns to the folded state; in the next step, simultaneously winding up the suspension ropes II-I441 and II-II442, and releasing the suspension ropes I-I431 and I-II432, so that the chain track in the folded state returns from the middle position in the bridge bottom width direction to one side of the bridge 00, and finally recovering the chain track in the folded state to the upper side of the bridge 00 through the suspension ropes II-I441 and II-II442 of the end unit II11, as Figures 17 to 14 .

[0085] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0086] The foldable chain track provided by the present invention has been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A foldable chain track, characterized in that, It is composed of multiple unit bodies hinged together, successively including an end unit body I (10), several intermediate unit bodies (12), and an end unit body II (11); pulley modules I are provided on the upper and lower sides of any one of the unit bodies, and pulley modules II are provided on the front side and / or the rear side of any one of the unit bodies, and a track member is provided on any one of the unit bodies; the pulley modules I on the upper sides of the end unit body I (10) and the end unit body II (11) are for connecting a suspension rope, the pulley modules I on the lower sides of the end unit body I (10) and the end unit body II (11) and the pulley modules I of the intermediate unit body (12) are for connecting a traction rope I, and the pulley modules II of the end unit body I (10), the intermediate unit body (12), and the end unit body II (11) are for connecting a traction rope II, so as to enable the foldable chain track to be in a curved state when the traction rope I and the traction rope II are relaxed, the foldable chain track to be in a folded state when the traction rope I is relaxed and the traction rope II is tightened, and the foldable chain track to be in a straight state and the track members to be spliced in the same straight line when the traction rope I is tightened and the traction rope II is relaxed.

2. The foldable chain track according to claim 1, wherein The end unit body I (10) and / or the end unit body II (11) is provided with a hoisting module I for connecting and driving the traction rope I, and / or, the end unit body I (10) and / or the end unit body II (11) is provided with a hoisting module II for connecting and driving the traction rope II.

3. The foldable chain track according to claim 2, wherein The hoisting module I includes a hoisting module I-I provided on the end unit body I (10) and a hoisting module III-I provided on the end unit body II (11), the hoisting module II includes a hoisting module I-II provided on the end unit body I (10) and a hoisting module III-II provided on the end unit body II (11), both ends of the traction rope I are connected to the hoisting module I-I and the hoisting module III-I, and both ends of the traction rope II are connected to the hoisting module I-II and the hoisting module III-II.

4. The foldable chain track according to claim 3, characterized in that, The hoisting module I-I includes a hoisting module I-I-I (111) and a hoisting module I-I-II (112), the hoisting module III-I includes a hoisting module III-I-I (311) and a hoisting module III-I-II (312), the hoisting module I-II includes a hoisting module I-II-I (113) and a hoisting module I-II-II (114), the hoisting module III-II includes a hoisting module III-II-I (313) and a hoisting module III-II-II (314). The towing rope I includes a towing rope I-I (411) connecting the hoisting module I-I-I (111) and the hoisting module III-I-I (311), and a towing rope I-II (412) connecting the hoisting module I-I-II (112) and the hoisting module III-I-II (312). The towing rope II includes a towing rope II-I (421) connecting the hoisting module I-II-I (113) and the hoisting module III-II-I (313), and a towing rope II-II (422) connecting the hoisting module I-II-II (114) and the hoisting module III-II-II (314). The towing rope I-I (411) and the towing rope I-II (412) are located on the lower side, and the towing rope II-I (421) and the towing rope II-II (422) are located on the front and back sides.

5. The foldable chain track according to claim 4, wherein, The suspension rope includes a suspension rope I and a suspension rope II. The pulley module I includes: a pulley module I-I-I (121), a pulley module I-I-II (122), and a pulley module I-I-III (123) provided on the end unit I (10). The pulley module I-I-II (122) and the pulley module I-I-I (121) are located on the lower left and right sides, and the pulley module I-I-III (123) is located on the upper left side and is connected to the suspension rope I; a pulley module III-I-I (321), a pulley module III-I-II (322), and a pulley module III-I-III (323) provided on the end unit II (11). The pulley module III-I-I (321) and the pulley module III-I-II (322) are located on the lower left and right sides, and the pulley module III-I-III (323) is located on the upper right side and is connected to the suspension rope II; a pulley module II-I-I (221) and a pulley module II-I-II (222) provided on the middle unit (12). The pulley module II-I-I (221) is located on the lower left side, and the pulley module II-I-II (222) is located on the upper right side.

6. The foldable chain track according to claim 4, wherein The pulley module II includes: the pulley module I-II-I (131), pulley module I-II-II (132), pulley module I-II-III (133), and pulley module I-II-IV (134) provided on the end unit I (10). The pulley module I-II-I (131) is located in the upper left front, the pulley module I-II-II (132) is located in the lower right front, the pulley module I-II-III (133) is located in the upper left rear, and the pulley module I-II-IV (134) is located in the lower right rear; the pulley module III-II-I (331), pulley module III-II-II (332), pulley module III-II-III (333), and pulley module III-II-IV (334) provided on the end unit II (11). The pulley module III-II-I (331) is located in the upper right front, the pulley module III-II-II (332) is located in the lower left front, the pulley module III-II-III (333) is located in the upper right rear, and the pulley module III-II-IV (334) is located in the lower left rear; the pulley module II-II-I (231), pulley module II-II-II (232), pulley module II-II-III (233), and pulley module II-II-IV (234) provided on the middle unit (12). The pulley module II-II-I (231) is located in the upper right front, the pulley module II-II-II (232) is located in the lower left front, the pulley module II-II-III (233) is located in the upper right rear, and the pulley module II-II-IV (234) is located in the lower left rear.

7. The foldable chain track according to claim 5, wherein The number of pulleys in the pulley module I is greater than or equal to four, and the towing rope I is wound reciprocally when continuously passing through the pulley modules I of two adjacent units.

8. The foldable chain track according to claim 6, characterized in that The number of pulleys in the pulley module II is greater than or equal to two, and the towing rope II is wound reciprocally when continuously passing through the pulley modules II of two adjacent units.

9. The foldable chain track according to any one of claims 1 to 8, characterized in that, The end unit I (10) is provided with a hinge joint I-I-I (151) located on the upper right side, the middle unit (12) is provided with a hinge joint II-II-I (261) located on the upper left side and a hinge joint II-I-I (251) located on the lower right side, the end unit II (11) is provided with a hinge joint III-II-I (361) located on the upper left side, the hinge joint I-I-I (151) is connected to the hinge joint II-II-I (261), and the hinge joint II-I-I (251) is connected to the hinge joint III-II-I (361).

10. The foldable chain track according to any one of claims 1 to 8, characterized in that, The end unit I (10), the intermediate unit (12), and the end unit II (11) include link assemblies that form a long rigid body. The rail members include rail member I and rail member II disposed above and below the front side of the link assemblies, and rail member III and rail member IV disposed above and below the rear side of the link assemblies.

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