Reconfigurable composite cable based on modular assembly for rail transit

Abstract

The invention relates to the technical field of rail transit cables, and provides a reconfigurable composite cable based on modular assembly for rail transit, the reconfigurable composite cable comprises a module assembly and a bus skeleton assembly, the module assembly comprises a module body and a U-shaped conductive reed, the bus skeleton assembly comprises a skeleton and a main power supply bus, and the bottom of the module body is provided with a mechanical buckle. A power supply cavity is arranged inside the module body, the U-shaped conductive reed is fixed in the power supply cavity inside the module body, the framework comprises an upper flange, the upper flange is provided with a dovetail groove and a locking barb, the main power supply bus is embedded in the dovetail groove of the upper flange, and the module assembly is fixed on the bus framework assembly through a mechanical buckle and a hook of the locking barb. And the U-shaped conductive reed and the main power supply bus form elastic pressure contact. According to the invention, rapid replacement and flexible reconstruction of the module can be realized, so that the maintenance efficiency and adaptability of the rail transit cable system are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of rail transit cable technology, and in particular to a reconfigurable composite cable for rail transit based on modular assembly. Background Technology

[0002] With the rapid development of my country's rail transit industry, on-board cables undertake the key tasks of power transmission and signal control. Their reliability, deployment flexibility, and maintenance convenience are directly related to the safety and operational efficiency of the entire rail transit system.

[0003] Currently, rail transit vehicles generally use fixed-form composite cables or discrete cables for wiring. These traditional cables have the following significant drawbacks: 1. The cable structure is fixed and unchangeable. When the vehicle system requires functional upgrades or configuration changes, it is impossible to make partial adjustments to the existing cables; the entire cable must be replaced, resulting in high modification costs and long cycles. 2. When any line within the cable malfunctions, because all functional units are fixed as a whole, it is difficult to achieve precise location and localized repair. Usually, the entire cable needs to be replaced, resulting in high maintenance costs and significant vehicle downtime losses. 3. Different vehicle models and installation locations require customized cables of different specifications, leading to a wide variety of cable types and placing enormous pressure on the OEM's production organization, material management, and inventory control.

[0004] Chinese patent CN209516554U discloses a locking and snapping device for power supply and distribution modules and the main body of a track-type busbar. This device solves the problem of fixed interface positions and inability to flexibly configure traditional busbar units. However, the device still has the following shortcomings: First, its electrical connection reliability is highly dependent on the clamping force of the mechanical snaps. Under long-term vibration, it is prone to loosening, leading to increased contact resistance and overheating risk. Second, the structure has a single function, mainly solving mechanical installation and power distribution problems. It fails to integrate the complex functions required by modern rail transit, such as signal transmission and status monitoring, and does not design a highly reliable overall sealing and protection structure for complex working conditions.

[0005] Therefore, how to provide a modular composite cable that can meet the stringent environmental requirements of rail transit, has reconfigurability and easy maintenance characteristics, and can be mass-produced in a standardized manner has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of this, in order to overcome the shortcomings of the prior art, the present invention aims to provide a reconfigurable composite cable based on modular assembly for rail transit.

[0007] This invention provides a reconfigurable composite cable for rail transit based on modular assembly. The device includes a module assembly and a busbar skeleton assembly. The module assembly includes a module body and a U-shaped conductive spring. The busbar skeleton assembly includes a skeleton and a main power bus. The bottom of the module body is provided with a mechanical buckle and a power cavity inside. The U-shaped conductive spring is fixed in the power cavity inside the module body. The skeleton includes an upper flange with a dovetail groove and a locking hook. The main power bus is embedded in the dovetail groove of the upper flange. The module assembly is fixed to the busbar skeleton assembly by the mechanical buckle and the hook of the locking hook, and the U-shaped conductive spring forms an elastic pressure contact with the main power bus.

[0008] Optionally, the reconfigurable composite cable for rail transit of the present invention is based on modular assembly, and the module body is further divided into a first signal cavity and a second signal cavity by longitudinal partitions.

[0009] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention further includes a power conductor, a first signal line, a second signal line, a power connector, a first signal connector, and a second signal connector. The power conductor is laid in the power cavity, with one end electrically connected to a U-shaped conductive spring and the other end connected to the power connector. The first signal line is laid in the first signal cavity and terminated at the first signal connector, and the second signal line is laid in the second signal cavity and terminated at the second signal connector.

[0010] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention has a main power busbar with a corrugated cross section copper busbar, which can be permanently fixed in the dovetail groove through an insert injection molding process.

[0011] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention further includes a web and a lower flange in the frame, and the web is provided with a first through hole and a second through hole that are horizontally parallel.

[0012] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention further includes a load-bearing element and a status monitoring optical fiber in the busbar skeleton assembly. The load-bearing element is inserted into a first through hole, and the status monitoring optical fiber is inserted into a second through hole.

[0013] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention further includes a locking housing that covers the exterior of the modular assembly and the busbar skeleton assembly.

[0014] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention includes an upper outer shell and a lower outer shell for locking the outer shell. The upper outer shell has L-shaped edging on both sides, and multiple first locking pins are symmetrically arranged on the inner side of the end of the L-shaped edging. The first locking pins have a third through hole. The top of the upper outer shell has multiple stepped through holes and multiple fourth through holes. The lower outer shell has J-shaped edging on both sides, and multiple positioning grooves are arranged on the inner bottom. The upper outer shell and the lower outer shell achieve primary positioning and axial constraint through the interlocking of the L-shaped edging and the J-shaped edging.

[0015] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention further includes multiple quick-locking mechanisms in the locking housing. Each quick-locking mechanism includes a slider, a return spring, a ratchet rack, a waterproof cover, and a locking band. The slider is disposed in the stepped through hole of the upper housing. A ratchet is provided on one side of the slider. The ratchet rack and the ratchet rack cooperate to form a one-way self-locking mechanism. The ratchet rack is rotatably connected to the second cantilever beam of the upper housing. The return spring is connected between the slider and the stepped surface of the stepped through hole. The waterproof cover is threaded into the fourth through hole of the upper housing.

[0016] Optionally, the reconfigurable composite cable for rail transit based on modular assembly of the present invention includes two sets of levers in each quick-lock mechanism. The two sets of levers are symmetrically arranged on both sides below the slider. The levers are hinged to the first cantilever beam fixed inside the upper housing. The other end of each set of levers is provided with a second locking pin. The second locking pin is provided with a fifth through hole. The two ends of the locking band pass through the fifth through hole and the third through hole, respectively.

[0017] The present invention provides a reconfigurable composite cable for rail transit based on modular assembly, which has the following beneficial technical effects: 1. Enables rapid reconfiguration and flexible expansion of system functions: Through standardized module interfaces, the number, type, and layout of functional modules can be adjusted at any time without replacing the main cable.

[0018] 2. Significantly simplifies maintenance processes and improves operational efficiency: The modular plug-and-play design allows for the replacement of only the corresponding functional module in case of a partial fault, making operation simple and quick. This avoids the need to replace entire sections of cable or perform complex on-site wiring as in traditional solutions, significantly reducing maintenance time and ensuring the efficient operation of the rail transit system.

[0019] 3. Improved integration and connection reliability, and optimized internal space: The power supply, signal and load-bearing units are highly integrated into an integrated frame, and the modules and the frame are electrically connected through elastic pressure contact, resulting in a compact structure.

[0020] 4. Provides highly reliable environmental sealing and mechanical protection: The lever-type quick-lock mechanism can generate a strong radial clamping force to ensure a tight seal on the outer shell and effectively resist external environmental corrosion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural example diagram of a modularly assembled reconfigurable composite cable for rail transit according to an embodiment of the present invention; Figure 2 This is another structural example diagram of a reconfigurable composite cable based on modular assembly for rail transit, according to an embodiment of the present invention. Figure 3 This is a cross-sectional view of a module component according to an embodiment of the present invention; Figure 4 This is an example diagram of the skeleton structure of an embodiment of the present invention; Figure 5 This is a first partial example diagram of a modularly assembled reconfigurable composite cable for rail transit according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of the lock housing structure according to an embodiment of the present invention; Figure 7 This is a second partial example diagram of a modularly assembled reconfigurable composite cable for rail transit according to an embodiment of the present invention; In the diagram, 1-module assembly, 2-busbar skeleton assembly, 3-locking housing, 11-module body, 12-U-shaped conductive spring, 13-power supply wire, 14-first signal line, 15-second signal line, 16-power connector, 17-first signal connector, 18-second signal connector, 21-skeleton, 22-main power busbar, 23-load-bearing element, 24-status monitoring fiber optic cable, 31-upper housing, 32-lower housing, 33-quick-lock mechanism, 111-mechanical buckle, 112-power cavity, 113-first signal cavity, 114-second signal cavity, 211-upper flange, 212-lower flange, 213-web plate 311-L-shaped edging, 312-First locking pin, 313-First cantilever beam, 314-Stepped through hole, 315-Fourth through hole, 316-Second cantilever beam, 321-J-shaped edging, 322-Positioning groove, 331-Locking drive block, 332-Reset spring, 333-Sealing ring, 334-Lever, 335-Ratchet, 336-Waterproof cover, 337-Locking band, 2111-Dovetail groove, 2112-Locking barb, 2131-First through hole, 2132-Second through hole, 3121-Third through hole, 3311-Ratchet, 3341-Second locking pin, 3342-Fifth through hole. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Figure 1 This is a schematic diagram of a reconfigurable composite cable for rail transit based on modular assembly, according to an embodiment of the present invention. Figure 1 As shown in this embodiment, a reconfigurable composite cable for rail transit based on modular assembly includes a module assembly 1, a busbar skeleton assembly 2, and a locking shell 3. The module assembly 1 is mechanically locked onto the busbar skeleton assembly 2, and the locking shell 3 encloses both the module assembly 1 and the busbar skeleton assembly 2.

[0027] Figure 2 This is another structural schematic diagram of a reconfigurable composite cable for rail transit based on modular assembly, according to an embodiment of the present invention. Figure 3 This is a cross-sectional view of a module component according to an embodiment of the present invention, such as... Figure 2 , Figure 3 As shown, module component 1 includes module body 11, U-shaped conductive spring 12, power wire 13, first signal line 14, second signal line 15, power connector 16, first signal connector 17 and second signal connector 18.

[0028] The lower ends of both sides of the module body 11 are symmetrically provided with mechanical buckles 111. The interior is divided into three independent through cavities by longitudinal partitions, namely the power supply cavity 112, the first signal cavity 113, and the second signal cavity 114. The lower end of the power supply cavity 112 is provided with a through groove that allows the U-shaped conductive spring 12 to pass through. The U-shaped conductive spring 12 is fixedly installed inside the upper end of the power supply cavity 112, with its two ends passing downward through the through groove and protruding from the bottom surface of the module body 11.

[0029] The power supply conductor 13 is installed inside the power supply cavity 112, with one end electrically connected to the U-shaped conductive spring 12 and the other end connected to the power connector 16. The first signal line 14 and the second signal line 15 are installed inside the first signal cavity 113 and the second signal cavity 114, respectively, and terminated at the first signal connector 17 and the second signal connector 18, respectively. In practical applications, the power connector 16, the first signal connector 17, and the second signal connector 18 can be selected from general industrial interfaces such as the M12 series connector conforming to the IEC 61076-2 standard or the RJ45 connector conforming to the IEC 60603-7 series, to achieve standardized and highly reliable connection with external devices or cables.

[0030] Figure 4 This is a schematic diagram of the skeleton structure of an embodiment of the present invention, such as... Figure 2 , Figure 4 As shown, in this embodiment, the busbar frame assembly 2 includes a frame 21, a main power busbar 22, a load-bearing element 23, and a status monitoring optical fiber 24. The frame 21 is an extruded composite material part with an I-shaped cross-section, including an upper flange 211, a lower flange 212, and a web 213. Locking barbs 2112 are provided on both sides of the lower surface of the upper flange 211, and dovetail grooves 2111 are symmetrically provided at the T-shaped angle where it connects to the web 213. A horizontally parallel first through hole 2131 and a second through hole 2132 are provided on the web 213.

[0031] It should be noted that in practical applications, the main power busbar 22 is a corrugated copper busbar, which can be permanently fixed in the dovetail groove 2111 through an insert injection molding process. The load-bearing element 23 is a tensile core made of high-strength aramid yarn, which is inserted into the first through hole 2131 and serves as the main load-bearing structure of the cable. The status monitoring optical fiber 24 is inserted into the second through hole 2132 and is used to monitor the strain and temperature status of the cable in real time during operation.

[0032] Figure 5 This is a partial example diagram of a modularly assembled reconfigurable composite cable for rail transit according to an embodiment of the present invention. Figure 2 , Figure 5As shown, in this embodiment, the module body 11 is hooked together with the locking hooks 2112 on the upper flange of the frame 21 via mechanical buckles 111 on both sides, achieving rapid mechanical locking between the module and the frame. The main power bus 22 symmetrically embedded on both sides of the frame 21 has a waveform cross-section design that ensures a firm mechanical interlock with the composite material frame during the insert injection molding process, preventing loosening due to vibration or thermal stress. After the module assembly 1 is installed in place, its U-shaped conductive spring 12 forms an elastic pressure with the upper surface of the main power bus 22, establishing a low-resistance, high-reliability electrical connection.

[0033] Figure 6 This is a cross-sectional view of the lock housing structure according to an embodiment of the present invention. Figure 7 This is a second partial example diagram of an embodiment of the present invention, such as... Figures 1 to 7 As shown, in this embodiment, the locking housing 3 includes an upper housing 31, a lower housing 32, and a quick-locking mechanism 33. The upper housing 31 has L-shaped edging 311 on both sides, with a first locking pin 312 on the inner side of the end of each L-shaped edging 311. A third through hole 3121 is provided on the first locking pin 312. A first cantilever beam 313 is symmetrically arranged on the inner top of the upper housing 31, with a stepped through hole 314 at a corresponding position on the housing wall, and a fourth through hole 315 on its side. A second cantilever beam 316 is also provided on the top of the inner wall of the upper housing 31. The lower housing 32 has J-shaped edging 321 on both sides, with positioning grooves 322 arranged on its inner bottom that match the contour of the lower flange 212 of the frame. The upper housing 31 and the lower housing 32 achieve primary positioning and axial constraint through the interlocking of the L-shaped edging 311 and the J-shaped edging 321.

[0034] The quick-lock mechanism 33 includes a locking drive block 331, a return spring 332, a sealing ring 333, two levers 334, a ratchet rack 335, a waterproof cover 336, and two locking straps 337. The locking drive block 331 is located in the stepped through hole 314. A ratchet 3311 is provided on one side of the locking drive block 331. In practical applications, the ratchet rack 335 can be rotatably connected to the second cantilever beam 316 of the upper housing 31 via a torsion spring. The torsion spring can provide a continuous pre-clamping force to the ratchet rack 335, so that its working end is always in contact with or tends to be in contact with the ratchet 3311 on the locking drive block 331. Together, they constitute a reliable one-way self-locking mechanism.

[0035] A return spring 332 is connected between the locking drive block 331 and the stepped surface of the stepped through hole 314, providing a return force for the locking drive block. The waterproof cover 336 is threaded into the fourth through hole 315 to achieve a protective seal.

[0036] Two levers 334 are symmetrically arranged on both sides below the locking drive block 331. Each set of levers 334 is hinged to the first cantilever beam 313 fixed inside the upper housing 31, forming a rotation fulcrum. One end of the lever 334 contacts the bottom of the locking drive block 331, and the other end is provided with a second locking pin 3341, which has a fifth through hole 3342. The two ends of the locking band 337 pass through the fifth through hole 3342 and the third through hole 3121, respectively. When the locking drive block 331 is pressed, it pushes the lever 334 to rotate around the fulcrum, and the other end of the lever 334 tightens the locking band 337 through the second locking pin 338. The strong radial clamping force generated by the locking band 337 forces the L / J-shaped edging of the upper and lower housings to be tightly pressed together, achieving a two-stage locking and environmental sealing of the entire cable.

[0037] The engagement of ratchet 3311 and ratchet rack 335 ensures that the locked state is maintained under vibration. When unlocking is required, a special tool can be used through the fourth through hole 315 to move the ratchet rack 335, releasing the self-locking. The return spring 332 then pushes the locking drive block 331 to reset, the locking band loosens, and the outer casing can be opened.

[0038] It should be noted that in practical applications, the axial length L of the locking housing 3 can be flexibly adjusted and manufactured according to the layout of the cable system. The quick-locking mechanism 33 needs to be arranged in an array along the centerline of the top of the housing. The pitch of the array (i.e., the distance between the centers of adjacent quick-locking mechanisms) can be designed according to the standard spacing of the modules or the deflection control requirements of the long housing. This array arrangement can effectively overcome the problem of uneven sealing pressure caused by the deformation of the long housing or thermal expansion and contraction through multi-point coordinated locking, thereby ensuring the overall sealing performance and mechanical reliability of the entire cable system under long-term vibration and complex environments.

[0039] The application principle of this invention is as follows: During assembly, the module assembly 1 is locked to the upper flange 211 of the busbar frame assembly 2 via the mechanical buckles 111 on both sides of its module body 11 and the locking hooks 2112 of the frame 21. This causes the U-shaped conductive spring 12 in the power cavity 112 of the module body 11 to form elastic pressure contact with the waveform cross-section main power busbar 22 embedded in the dovetail groove 2111 of the frame 21, thereby enabling the module to draw power.

[0040] At this time, the power supply wire 13, the first signal wire 14, and the second signal wire 15 inside the module are prepared for signal output through the power connector 16, the first signal connector 17, and the second signal connector 18, respectively. Subsequently, the upper outer shell 31 and the lower outer shell 32 of the locking housing 3 are fastened together by the L-shaped edging 311 and the J-shaped edging 321, and by pressing the locking drive block 331 of the distributed quick-lock mechanism 33, the symmetrically arranged levers 334 are driven to rotate around the first cantilever beam 313, thereby tightening the locking band 337 to generate radial clamping force, thus achieving the sealing and fixing of the housing.

[0041] Finally, a system-integrated connector can be used at the cable end. The internal backplate of the connector can be simultaneously plugged into the power connector 16, the first signal connector 17, and the second signal connector 18 of all modules, and bolted to the main power bus 22. Externally, it can be connected to the vehicle control system, auxiliary power supply, and actuators through a hybrid circular interface.

[0042] When any internal cable or circuit of any module is damaged, the self-locking can be released by unscrewing the waterproof cover 336 and using a tool to move the ratchet 335 through the fourth through hole 315, opening the lock housing 3 and directly replacing the faulty module component 1. The system function can be restored without disassembling the cable body or end connector, thus realizing rapid maintenance and functional reconstruction of the system.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A reconfigurable composite cable for rail transit based on modular assembly, characterized in that, The system includes a module assembly (1) and a busbar frame assembly (2). The module assembly (1) includes a module body (11) and a U-shaped conductive spring (12). The busbar frame assembly (2) includes a frame (21) and a main power busbar (22). The module body (11) has a mechanical buckle (111) at the bottom and a power supply cavity (112) inside. The U-shaped conductive spring (12) is fixed inside the power supply cavity (112) inside the module body (11). The frame (21) includes a frame (21) and a main power busbar (22). 1) Includes an upper flange (211), on which a dovetail groove (2111) and a locking barb (2112) are provided. The main power bus (22) is embedded in the dovetail groove (2111) of the upper flange (211). The module assembly (1) is fixed to the bus frame assembly (2) by the hook of the locking barb (2112) through the mechanical buckle (111) and the hook, and the U-shaped conductive spring (12) forms an elastic pressure contact with the main power bus (22).

2. The reconfigurable composite cable for rail transit based on modular assembly according to claim 1, characterized in that, The module body (11) is further divided by a longitudinal partition to form a first signal cavity (113) and a second signal cavity (114).

3. A reconfigurable composite cable for rail transit based on modular assembly according to claim 1, characterized in that, The module component (1) further includes a power wire (13), a first signal line (14), a second signal line (15), a power connector (16), a first signal connector (17), and a second signal connector (18). The power wire (13) is arranged in the power cavity (112), with one end electrically connected to the U-shaped conductive spring (12) and the other end connected to the power connector (16). The first signal line (14) is arranged in the first signal cavity (113) and terminated at the first signal connector (17). The second signal line (15) is arranged in the second signal cavity (114) and terminated at the second signal connector (18).

4. A reconfigurable composite cable for rail transit based on modular assembly according to claim 1, characterized in that, The main power bus (22) is a copper busbar with a waveform cross section, and can be permanently fixed in the dovetail groove (2111) by insert injection molding process.

5. A reconfigurable composite cable for rail transit based on modular assembly according to claim 1, characterized in that, The frame (21) also includes a web (213) and a lower flange (212). The web (213) has a first through hole (2131) and a second through hole (2132) that are horizontally parallel.

6. A reconfigurable composite cable for rail transit based on modular assembly according to claim 5, characterized in that, The busbar skeleton assembly (2) also includes a load-bearing element (23) and a status monitoring fiber (24). The load-bearing element (23) is inserted into the first through hole (2131), and the status monitoring fiber (24) is inserted into the second through hole (2132).

7. A reconfigurable composite cable for rail transit based on modular assembly according to claim 1, characterized in that, It also includes a locking housing (3), which covers the outside of the module assembly (1) and the busbar frame assembly (2).

8. A reconfigurable composite cable for rail transit based on modular assembly according to claim 7, characterized in that, The locking housing (3) includes an upper housing (31) and a lower housing (32). The upper housing (31) has L-shaped edging (311) on both sides. The inner side of the end of the L-shaped edging (311) is symmetrically provided with multiple first locking pins (312). The first locking pins (312) are provided with a third through hole (3121). The top of the upper housing (31) is provided with multiple stepped through holes (314) and multiple fourth through holes (315). The lower housing (32) has J-shaped edging (321) on both sides. The bottom of the inner side is provided with multiple positioning grooves (322). The upper housing (31) and the lower housing (32) achieve primary positioning and axial constraint through the interlocking of the L-shaped edging (311) and the J-shaped edging (321).

9. A reconfigurable composite cable for rail transit based on modular assembly according to claim 8, characterized in that, The locking housing (3) also includes multiple quick-locking mechanisms (33). The quick-locking mechanism (33) includes a locking drive block (331), a return spring (332), a ratchet rack (335), a waterproof cover (336), and a locking band (337). The locking drive block (331) is located in the stepped through hole (314) of the upper housing (31). A ratchet (3311) is provided on one side of the locking drive block (331). The ratchet (3311) and the ratchet rack (335) cooperate to form a one-way self-locking mechanism. The ratchet rack (335) is rotatably connected to the second cantilever beam (316) of the upper housing (31). The return spring (332) is connected between the locking drive block (331) and the stepped surface of the stepped through hole (314). The waterproof cover (336) is threaded into the fourth through hole (315) of the upper housing (31).

10. A reconfigurable composite cable for rail transit based on modular assembly according to claim 9, characterized in that, Each set of quick-locking mechanisms (33) also includes two sets of levers (334). The two sets of levers (334) are symmetrically arranged on both sides below the locking drive block (331). The levers (334) are hinged to the first cantilever beam (313) fixed inside the upper housing (31). The other end of each set of levers (334) is provided with a second locking pin (3341). The second locking pin (3341) is provided with a fifth through hole (3342). The two ends of the locking band (337) pass through the fifth through hole (3342) and the third through hole (3121) respectively.

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