Quick release structure of a drag chain cover plate and a drag chain

Abstract

The application discloses a quick-release structure of a drag chain cover plate and a drag chain. The quick-release structure of the drag chain cover plate comprises a first chain plate, a second chain plate and a cover plate. The first end of the cover plate is hingedly connected to the first chain plate. The second end of the cover plate is detachably mounted on the second chain plate through a quick-release mechanism. The quick-release mechanism comprises a sliding piece, a locking piece and a limiting assembly. The sliding piece is slidably mounted on the cover plate along the length direction of the cover plate. The locking piece is arranged on the sliding piece. The inner side wall of the second chain plate is provided with a locking groove corresponding to the locking piece. The limiting assembly is configured to position the sliding piece at a first position or a second position. When the sliding piece is located at the first position, the second end of the cover plate is locked on the second chain plate. When the sliding piece is located at the second position, the locking between the second end of the cover plate and the second chain plate is released. The quick-release structure of the drag chain cover plate is not only ingenious and easy to realize, but also greatly improves the dismounting efficiency of the cover plate, and is simple to operate, time-saving and labor-saving.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of drag chain, in particular to a quick-release structure of a drag chain cover plate and a drag chain. BACKGROUND

[0002] The drag chain is suitable for use in reciprocating motion occasions, can play a traction and protection role on the built-in cables, oil pipes, gas pipes, water pipes and the like, and makes the whole machine look more beautiful. The drag chain is composed of a plurality of chain links, the plurality of chain links are relatively rotatably connected together, a unit chain link is composed of two chain plates and upper and lower cover plates, the two chain plates and the upper and lower cover plates form a channel, and the cables, oil pipes, gas pipes and water pipes are placed in the channel of the drag chain.

[0003] In the prior art, the two ends of the upper cover plate and / or the lower cover plate of the drag chain are mostly connected to the two chain plates through a buckle structure. When the upper cover plate and / or the lower cover plate is disassembled, the two ends of the upper cover plate and / or the lower cover plate need to be disassembled from the corresponding chain plates, and the buckle structure is not convenient to disassemble and assemble, which has the disadvantages of inconvenient operation and time-consuming and laborious. SUMMARY

[0004] The purpose of the present application is to provide a quick-release structure of a drag chain cover plate and a drag chain to solve the problem of inconvenient operation and time-consuming and laborious disassembly of the upper cover plate and / or the lower cover plate of the drag chain in the prior art.

[0005] To achieve this purpose, the present application adopts the following technical solutions:

[0006] A quick-release structure of a drag chain cover plate, comprising a first chain plate, a second chain plate and a cover plate, the first end of the cover plate is hinged to the first chain plate, the second end of the cover plate is detachably mounted on the second chain plate through a quick-release mechanism, wherein,

[0007] The quick-release mechanism comprises a sliding member, a locking member and a limiting assembly, the sliding member is slidably mounted on the cover plate along the length direction of the cover plate, the locking member is arranged on the sliding member, the inner side wall of the second chain plate is provided with a locking groove corresponding to the locking member, and the limiting assembly is configured to position the sliding member at a first position or a second position,

[0008] When the sliding member is located at the first position, the locking member protrudes from the end of the cover plate and is inserted into the locking groove, so as to lock the second end of the cover plate on the second chain plate.

[0009] When the sliding member is located at the second position, the end of the locking member is separated from the locking groove, so as to release the locking of the second end of the cover plate and the second chain plate.

[0010] Furthermore, the first chain plate is provided with a hinge shaft, and the first end of the cover plate is provided with a hinge groove with an opening. The first end of the cover plate is rotatably mounted on the hinge shaft through the hinge groove, and the hinge shaft and the hinge groove are tightly fitted together.

[0011] Furthermore, the first chain plate is provided with a hinge groove with an opening, and the first end of the cover plate is provided with a hinge shaft. The first end of the cover plate is rotatably installed in the hinge groove through the hinge shaft, and the hinge shaft and the hinge groove are tightly fitted together.

[0012] Furthermore, the second end of the cover plate is provided with a limiting head, and a limiting groove is formed on the second chain plate in conjunction with the limiting head. A positioning boss is provided in the limiting groove, and a positioning hole is formed on the limiting head in conjunction with the positioning boss. The locking groove is formed on the inner side of the positioning boss.

[0013] Furthermore, both ends of the cover plate are provided with sliding grooves extending along the length direction of the cover plate. The sliding member can be slidably assembled in the sliding groove. The length of the sliding groove is greater than the length of the sliding member. The bottom of the sliding groove is provided with a through hole penetrating the end of the cover plate. The locking member passes through the through hole and is inserted into the corresponding locking groove.

[0014] Furthermore, the limiting component includes a limiting boss and two elastic claws. One end of the two elastic claws is connected to the sliding member, and the other end is brought together to form an elastic latch. The limiting boss is disposed at the bottom of the slide groove. The width of the elastic latch is smaller than the width of the limiting boss. When the sliding member is in the first position, the side of the limiting boss near the second end of the cover plate positions the sliding member. When the sliding member is in the second position, the side of the limiting boss away from the second end of the cover plate positions the sliding member.

[0015] Furthermore, the limiting boss is symmetrically provided with two first positioning slopes and two second positioning slopes, and the elastic latch is provided with two third positioning slopes and two fourth positioning slopes on both sides respectively. When the sliding member is in the first position, the two first positioning slopes and the two third positioning slopes are tightly engaged to position the sliding member. When the second end of the cover plate is removed, the sliding member is pushed to slide towards the center of the drag chain cover plate. The elastic latch is subjected to increased force and returns to its original position after passing the two first positioning slopes. The two second positioning slopes and the two fourth positioning slopes are tightly engaged to position the sliding member in the second position.

[0016] Furthermore, the sliding member, locking member, and two elastic claws are integrally injection molded. The locking member is located below the sliding member, and one end of each of the two elastic claws is connected to the locking member. The locking member is connected to the sliding member through a connecting part, which is eccentrically located on the sliding member and positioned near the end of the cover plate. The locking member includes a locking head and a connecting plate. The locking head is connected to the connecting part through the connecting plate and is located at the head end of the connecting plate. The tail end of the connecting plate has a limiting block extending between the two elastic claws. The thickness of the locking head is greater than the thickness of the connecting plate.

[0017] Furthermore, the cover plate is either the upper or lower cover plate of a unit link of the cable chain, and the cover plate is either a closed or open cover plate of a unit link of the cable chain.

[0018] A cable chain includes a plurality of unit links connected together in a rotatable manner. Each unit link includes a first chain plate, a second chain plate, an upper cover plate, and a lower cover plate, wherein the upper cover plate and / or the lower cover plate are mounted on the first chain plate and the second chain plate by means of a quick-release structure of the cable chain cover plate.

[0019] The beneficial effects of this invention are as follows: Compared with the prior art, the quick-release structure of the cable chain cover hinges one end of the cover to the first chain plate, and the other end is installed on the second chain plate through a quick-release mechanism. This allows for easy removal of the cover by simply disassembling one end and flipping the cover over. Simultaneously, locking and unlocking the cover to the corresponding chain plate can be achieved by operating the sliding component. This design is not only ingenious and easy to implement, but also significantly improves the efficiency of cover assembly and disassembly while ensuring the reliability of the connection between the cover and the chain plate. It is simple to operate and saves time and effort. Attached Figure Description

[0020] Figure 1 This is an exploded view of the quick-release structure of the drag chain cover plate provided in a specific embodiment of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the quick-release structure of the cable chain cover plate provided in a specific embodiment of the present invention.

[0022] Figure 3 This is a top view schematic diagram of the quick-release structure of the cable chain cover plate provided in a specific embodiment of the present invention.

[0023] Figure 4 This is a side view of the cover plate of the quick-release structure of the cable chain cover plate provided in a specific embodiment of the present invention;

[0024] Figure 5This is a three-dimensional structural diagram of the sliding component of the quick-release structure of the drag chain cover plate provided in a specific embodiment of the present invention;

[0025] Figure 6 This is a bottom view schematic diagram of the sliding component of the quick-release structure of the drag chain cover plate provided in a specific embodiment of the present invention;

[0026] Figure 7 This is a side view schematic diagram of the sliding component of the quick-release structure of the cable chain cover plate provided in a specific embodiment of the present invention;

[0027] Figure 8 This is a three-dimensional structural diagram of the first chain plate of the quick-release structure of the drag chain cover plate provided in a specific embodiment of the present invention;

[0028] Figure 9 This is a three-dimensional structural diagram of the second chain plate of the quick-release structure of the drag chain cover plate provided in a specific embodiment of the present invention. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please see Figures 1 to 9As shown, in this embodiment, a quick-release structure for a cable chain cover includes a first chain plate 1, a second chain plate 2, and a cover plate 3. The first end of the cover plate 3 is hinged to the first chain plate 1, and the second end of the cover plate 3 is detachably mounted to the second chain plate 2 via a quick-release mechanism. The quick-release mechanism includes a sliding member 4, a locking member 5, and a limiting component. The sliding member 4 is slidably mounted on the cover plate 3 along its length. The locking member 5 is disposed on the sliding member 4. A locking groove 20 is provided on the inner sidewall of the second chain plate 2 corresponding to the locking member 5. The limiting component is configured to position the sliding member 4 in a first position or a second position.

[0032] When the sliding member 4 is in the first position, the locking member 5 extends out of the end of the cover plate 3 and inserts into the locking groove 20 to lock the second end of the cover plate 3 onto the second chain plate 2.

[0033] When the sliding member 4 is in the second position, the end of the locking member 5 disengages from the locking groove 20 to release the second end of the cover plate 3 from the second chain plate 2.

[0034] It should be noted that: cover plate 3 can be either the upper or lower cover plate of a unit link of the cable chain, and cover plate 3 can also be either a closed or open cover plate of a unit link of the cable chain.

[0035] As can be seen, by hinged the first end of the cover plate 3 to the first chain plate 1, and providing a sliding member 4 and a locking member 5 at the second end, during installation, the first end of the cover plate 3 is first hinged to the first chain plate 1, and the cover plate 3 is flipped downwards to a preset angle around the first end. Then, the sliding member 4 is pushed closer to the second chain plate 2, so that the locking member 5 is inserted into the locking groove 20 on the second chain plate 2. At this time, the limiting component fixes the locking member 5 in the first position, thereby achieving quick installation of the cover plate 3. During disassembly, the sliding member 4 is first pushed away from the second chain plate 2, so that the locking member 5 is disengaged from the locking groove 20 on the second chain plate 2. At this time, the limiting component fixes the locking member 5 in the second position, thereby unlocking the second end of the cover plate 3. Then, the cover plate 3 is flipped upwards around the first end to open the cover plate 3, facilitating the placement of wires or tubular parts. While ensuring the reliability of the connection between the cover plate 3 and the first chain plate 1 and the second chain plate 2, the efficiency of cover plate assembly and disassembly is greatly improved, and the operation is simple, time-saving, and labor-saving.

[0036] As an optional implementation, the first chain plate 1 has an assembly groove 10 for mounting the cover plate 3. A hinge shaft 11 is provided in the assembly groove 10. The first end of the cover plate 3 has an open hinge groove 30. The first end of the cover plate 3 is rotatably mounted on the hinge shaft 11 through the hinge groove 30. The hinge shaft 11 and the hinge groove 30 are tightly fitted so that the cover plate 3 can be fixed at any angle during the flipping process.

[0037] As another alternative implementation, a hinge groove with an opening can be provided on the first chain plate 1, and a hinge shaft can be provided at the first end of the cover plate 2. The first end of the cover plate is rotatably installed in the hinge groove via the hinge shaft. The hinge shaft and the hinge groove are tightly fitted so that the cover plate 3 can be fixed at any angle during the flipping process.

[0038] As can be seen, the hinge connection between the cover plate 3 and the first chain plate 1 is achieved through the cooperation of the hinge shaft 11 and the hinge groove 30, providing a simple and easy-to-implement hinge connection method.

[0039] As an optional implementation, a square limiting head 31 is provided at the second end of the cover plate 3. A square limiting groove 21 is provided on the second chain plate 2 in conjunction with the limiting head 31. A square positioning boss 22 is provided in the limiting groove 21. A square positioning hole 32 is provided on the limiting head 31 in conjunction with the positioning boss 22. A locking groove 20 is provided on the inner side of the positioning boss 22.

[0040] As can be seen, by the cooperation of the limiting head 31 and the limiting groove 21, the end of the cover plate 3 can be completely embedded into the second chain plate 2. At the same time, the setting of the positioning boss 22 and the positioning hole 32 can ensure the accuracy of the installation position of the cover plate 3 and the reliability of the connection, so as to realize the stable and reliable connection of the end of the cover plate 3 to the second chain plate 2.

[0041] As an optional implementation, both ends of the cover plate 3 are provided with sliding grooves 33 extending along the length direction of the cover plate 3. The sliding grooves 33 are also provided with inner grooves 34. The sliding member 4 can be slidably assembled in the sliding grooves 33. The length of the sliding grooves 33 is greater than the length of the sliding member 4. The bottom of the inner groove 34 is provided with a through hole 35 penetrating the end of the cover plate 3. The through hole 35 is connected to the positioning hole 32. The locking member 5 passes through the through hole 35 and is inserted into the locking groove 20. Preferably, the through hole 35 is a square hole, and the end of the locking member 5 that passes through the through hole 35 is also a square structure.

[0042] As can be seen, by setting the slide groove 33, the sliding member 4 is assembled in the slide groove 33, which can ensure the stability and reliability of the sliding member 4. The length of the slide groove 33 is greater than the length of the sliding member 4 so that the sliding member 4 can be in the first position and the second position. The inner groove 34 is used to provide assembly space for the locking member 5 and the limiting component. The through hole 35 and the locking member 5 are set as a square structure that cooperates with each other. When the locking member 5 passes through the through hole 35, the through hole 35 also has a guiding and limiting effect on the locking member 5 to ensure the stability and reliability of the sliding of the locking member 5.

[0043] As an optional implementation, the limiting component includes a limiting boss 6 and two elastic claws 7. One end of the two elastic claws 7 is connected to the slider 4, and the other end is brought together to form an elastic latch 70. The limiting boss 6 is disposed at the bottom of the slide groove 33. The opening width of the elastic latch 70 is smaller than the width of the limiting boss 6. When the slider 4 is in the first position, the side of the limiting boss 6 near the second end of the cover plate 3 positions the slider 4. When the cover plate 3 is removed, the slider 4 is pushed to slide towards the center of the cover plate 3. The elastic latch 70 is subjected to greater force and passes over the limiting boss 6. At this time, the side of the limiting boss 6 away from the second end of the cover plate 3 positions the slider 4 to position the slider 4 in the second position.

[0044] As can be seen, by cooperating with the two ends of the limiting boss 6 and the elastic latch 70, the sliding member 4 is relatively fixed in the first position or the second position, providing a simple, reliable and stable limiting component.

[0045] As an optional implementation, the limiting boss 6 is symmetrically provided with two first positioning slopes 60 and two second positioning slopes 61. The elastic latch 70 is provided with two third positioning slopes 71 and two fourth positioning slopes 72 on both sides. When the sliding member 4 is in the first position, the two first positioning slopes 60 and the two third positioning slopes 71 are tightly fitted together to position the sliding member 4. When the cover plate 3 is removed, the sliding member 4 is pushed to slide towards the center of the cover plate 3. The elastic latch 70 is subjected to greater force and returns to its original position after passing over the two first positioning slopes 60. The two second positioning slopes 61 and the two fourth positioning slopes 72 are tightly fitted together to position the sliding member 4 in the second position.

[0046] It is evident that the cooperation between the limiting boss 6 and the positioning inclined surface on the elastic latch 70 further improves the stability and reliability of the positioning of the sliding part 4.

[0047] As an optional implementation, the sliding member 4, the locking member 5, and the two elastic claws 7 are integrally injection molded. The locking member 5 is located below the sliding member 4, and one end of each of the two elastic claws 7 is connected to the locking member 5. The locking member 5 is connected to the sliding member 4 via a connecting part 8. The connecting part 8 is eccentrically located on the sliding member 4 and is positioned on one side near the second end of the cover plate 3. The locking member 5 includes a locking head 50 and a connecting plate 51. The locking head 50 is connected to the connecting part 8 via the connecting plate 51 and is located at the head end of the connecting plate 51. A limiting block 52 extending between the two elastic claws 7 is provided at the tail end of the connecting plate 51. The thickness of the locking head 50 is greater than the thickness of the connecting plate 51.

[0048] It is evident that by integrating the slider 4, locking member 5, and two elastic claws 7 into a single structure, a sliding assembly that is easy to manufacture and low in cost is provided. Of course, depending on actual needs, the slider 4, locking member 5, and two elastic claws 7 can also be arranged as separate components that can be disassembled. By eccentrically positioning the connecting portion 8 and setting the thickness of the connecting plate 51 to be less than the thickness of the locking head 50, the junction between the connecting plate 51 and the locking head 50 is made more easily deformable, thus facilitating the disassembly and assembly of the slider 4. Simultaneously, the limiting block 52 can limit the slider 4 from the outside when it is in the second position, further improving the stability and reliability of the slider 4's positioning.

[0049] When installing the slider 4, first align the locking head 50 with the through hole 35 and insert it, then push the entire slider 4 outward into the slide groove 33.

[0050] When disassembling the sliding member 4, since the sliding member 4 is located in the first position, there is a gap 8 between the inner side of the slide groove 33 and the sliding member 4 to facilitate operation. The inner end of the sliding member 4 is lifted upward, so that the connecting plate 51 and the locking head 50 are deformed. Finally, the entire sliding member 4 can be pulled out from the slide groove 33.

[0051] The specific disassembly and assembly process of the quick-release structure of the aforementioned cable chain cover is as follows:

[0052] During installation:

[0053] S1, firstly, install the first end of the cover plate 3 onto the hinge shaft 11 on the first chain plate 1 through the hinge groove 30.

[0054] S2, flip the cover plate 3 downwards around the hinge shaft 11 to a horizontal state. At this time, the first end of the cover plate 3 is positioned by the cooperation of the positioning boss 22 and the positioning hole 32, so that the locking head 50 corresponds to the locking groove 20 on the second chain plate 2.

[0055] S3, push the sliding member 4 at the second end of the cover plate 3 to the first position for positioning. At this time, the locking head 50 on the sliding member 4 is inserted into the locking groove 20 on the second chain plate 2 to fix the second end of the cover plate 3 on the second chain plate 2, thus completing the installation of one cover plate.

[0056] When disassembled:

[0057] S1, In the initial state, the sliding member 4 at the second end of the cover plate 3 is in the first position. Push the sliding member 4 at the second end of the cover plate 3 to the second position for positioning. At this time, the locking head 50 on the sliding member 4 disengages from the locking groove 20 on the second chain plate 2 so that the second end of the cover plate 3 is unlocked from the second chain plate 2.

[0058] S2, operate the second end of the cover plate 3 to make the cover plate 3 rotate upward around the hinge shaft 11 to a preset angle so that the channel of the cable chain is opened, thus completing the disassembly of one cover plate.

[0059] A cable chain includes several unit links that are rotatably connected together. Each unit link includes a first chain plate, a second chain plate, an upper cover plate, and a lower cover plate, wherein the upper cover plate and / or the lower cover plate are mounted on the first chain plate and the second chain plate via a quick-release structure of the cable chain cover plate.

[0060] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above examples. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-release structure for a cable chain cover, characterized in that, The quick-release structure of the cable chain cover includes a first chain plate, a second chain plate, and a cover plate. The first end of the cover plate is hinged to the first chain plate, and the second end of the cover plate is detachably mounted on the second chain plate via a quick-release mechanism. The quick-release mechanism includes a sliding member, a locking member, and a limiting component. The sliding member is slidably mounted on the cover plate along the length direction of the cover plate. The locking member is disposed on the sliding member. A locking groove is formed on the inner sidewall of the second chain plate corresponding to the locking member. The limiting component is configured to position the sliding member in a first position or a second position. When the sliding member is in the first position, the locking member extends out of the end of the cover plate and inserts into the locking groove to lock the second end of the cover plate onto the second chain plate. When the sliding member is in the second position, the end of the locking member disengages from the locking groove to release the lock between the second end of the cover plate and the second chain plate. Both ends of the cover plate are provided with sliding grooves extending along the length direction of the cover plate. The sliding member is slidably assembled in the sliding groove. The length of the sliding groove is greater than the length of the sliding member. The bottom of the sliding groove is provided with a through hole penetrating the end of the cover plate. The locking member passes through the through hole and is inserted into the corresponding locking groove. The limiting component includes a limiting boss and two elastic claws. One end of the two elastic claws is connected to the slider, and the other end is brought together to form an elastic latch. The limiting boss is disposed at the bottom of the slide groove. The width of the elastic latch is smaller than the width of the limiting boss. When the slider is in the first position, the side of the limiting boss near the second end of the cover plate positions the slider. When the slider is in the second position, the side of the limiting boss away from the second end of the cover plate positions the slider. The sliding member, locking member, and two elastic claws are integrally injection molded. The locking member is located below the sliding member. One end of each of the two elastic claws is connected to the locking member. The locking member is connected to the sliding member through a connecting part. The connecting part is eccentrically located on the sliding member and is positioned on one side near the end of the cover plate. The locking member includes a locking head and a connecting plate. The locking head is connected to the connecting part through the connecting plate. The locking head is located at the head end of the connecting plate. The tail end of the connecting plate is provided with a limiting block extending between the two elastic claws. The thickness of the locking head is greater than the thickness of the connecting plate.

2. The quick-release structure of the cable chain cover plate according to claim 1, characterized in that, The first chain plate is provided with a hinge shaft, and the first end of the cover plate is provided with a hinge groove with an opening. The first end of the cover plate is rotatably mounted on the hinge shaft through the hinge groove, and the hinge shaft and the hinge groove are tightly fitted together.

3. The quick-release structure of the cable chain cover plate according to claim 1, characterized in that, The first chain plate is provided with a hinge groove with an opening, and the first end of the cover plate is provided with a hinge shaft. The first end of the cover plate is rotatably installed in the hinge groove through the hinge shaft, and the hinge shaft and the hinge groove are tightly fitted.

4. The quick-release structure of the cable chain cover plate according to claim 1, characterized in that, The second end of the cover plate is provided with a limiting head, and the second chain plate is provided with a limiting groove that cooperates with the limiting head. A positioning boss is provided in the limiting groove, and a positioning hole that cooperates with the positioning boss is provided on the limiting head. The locking groove is provided on the inner side of the positioning boss.

5. The quick-release structure of the cable chain cover plate according to claim 1, characterized in that, Two first positioning ramps and two second positioning ramps are symmetrically arranged on the limiting protrusion. Two third positioning ramps and two fourth positioning ramps are respectively arranged on both sides of the elastic latch. When the sliding member is in the first position, the two first positioning ramps and the two third positioning ramps are tightly engaged to position the sliding member. When the second end of the cover plate is removed, the sliding member is pushed to slide towards the center of the cover plate. The elastic latch is subjected to increased force and returns to its original position after passing the two first positioning ramps. The two second positioning ramps and the two fourth positioning ramps are tightly engaged to position the sliding member in the second position.

6. The quick-release structure of the cable chain cover plate according to claim 1, characterized in that, The cover plate is either the upper or lower cover plate of a unit link of the cable chain, and it can be either a closed or open cover plate of a unit link of the cable chain.

7. A cable chain, the cable chain comprising a plurality of unit links, the plurality of unit links being rotatably connected together, each unit link comprising a first chain plate, a second chain plate, an upper cover plate, and a lower cover plate, characterized in that, The upper cover plate and / or lower cover plate are both installed on the first chain plate and the second chain plate via a quick-release structure for the drag chain cover plate as described in any one of claims 1-6.

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