Drag chain

Abstract

The utility model relates to a drag chain. The drag chain comprises at least one first chain link, at least one second chain link and a connecting shaft, the first chain link and the second chain link can be rotationally connected with each other, each of the first chain link and the second chain link comprises a chain plate body and two side plates, and the two side plates are arranged on the two opposite sides of the chain plate body in the first direction; each chain plate body comprises a first shaft barrel and a second shaft barrel, and the first shaft barrels and the second shaft barrels are arranged on the two opposite sides of the same chain plate body in the second direction. The connecting shaft penetrates through the side plate of the first chain link, the side plate of the second chain link, the first shaft barrel of the first chain link and the second shaft barrel of the second chain link, and the first chain link and the second chain link are hinged through the connecting shaft. The second direction is perpendicular to the first direction. According to the drag chain, the lateral bearing capacity is higher, the supporting performance is better, the axial deformation resisting capacity is good, even if the drag chain is hung on the side, the bad conditions such as lateral bending and twisting are not prone to occurring, and the reliability of the drag chain can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable arrangement, in particular to a drag chain. Background Art

[0002] Drag chain, also known as tank chain, is a device that binds cables, wires, air pressure pipes or oil pressure pipes to facilitate their rotation and movement. Drag chain can pull and protect wires, cables or pipes placed inside it.

[0003] How to improve the protective effect of drag chains on pipelines bound in them is one of the research topics in the industry. Utility Model Content

[0004] At present, most drag chains are used in horizontal or vertical extension positions. However, in practical applications, it is also hoped that the drag chain can be used in a sideways position to increase the design freedom of the drag chain. However, the existing drag chain structure cannot withstand lateral forces. Therefore, when the drag chain is suspended sideways, it is likely to bend sideways, twist, and deform, which may cause the pipelines bound in it to deform or even damage the pipelines. Therefore, how to enhance the lateral bearing capacity of the drag chain to better protect the pipelines bound on it is one of the research topics in the industry.

[0005] In view of this, an embodiment of the present disclosure provides a drag chain. The drag chain comprises:

[0006] at least one first link and at least one second link, the first link and the second link are rotatably connected to each other, the first link and the second link each include a chain plate body and two side plates, the two side plates are arranged on opposite sides of the chain plate body along a first direction, each of the chain plate bodies includes a first shaft cylinder and a second shaft cylinder, the first shaft cylinder and the second shaft cylinder are arranged on opposite sides of the same chain plate body along a second direction;

[0007] A connecting shaft, the connecting shaft passing through the side plate of the first chain link, the side plate of the second chain link, the first shaft cylinder of the first chain link and the second shaft cylinder of the second chain link, the first chain link and the second chain link being hingedly connected via the connecting shaft;

[0008] The second direction is perpendicular to the first direction.

[0009] Thus, the first link and the second link can be hinged as a whole only through one connecting shaft, which reduces the number of parts and components and reduces the difficulty of assembly. In addition, the connection shaft is used for hinge connection, so that the connection between the first link and the second link is tighter. On the premise that the first link and the second link can rotate with each other, the lateral load-bearing capacity and support of the drag chain are stronger. In this way, even when the drag chain is used in a side-standing hanging state, it can have a good ability to resist axial deformation, making it less likely for the drag chain to have adverse phenomena such as lateral bending and twisting, so that the pipelines bound thereon can be better protected, which is conducive to improving the reliability of the drag chain.

[0010] In some embodiments, the drag chain includes a plurality of the first links and a plurality of the second links.

[0011] Thus, the number of the first chain links and the second chain links can be set according to actual usage conditions, so that the drag chain has a suitable length and is more convenient for users to use.

[0012] In some embodiments, the side plate includes a first plate body and a second plate body, the second plate body is located on a side of the first plate body close to the chain plate body along the first direction, one end of the first plate body and the second plate body along the second direction are connected to each other to form a connecting portion, and the other ends along the second direction are spaced from each other to form a gap portion, the connecting portion of the side plate of the second link is inserted into the gap portion of the side plate of the first link to form a side plate connecting portion; the connecting shaft passes through the side plate connecting portion.

[0013] Therefore, the side plate of the first link and the side plate of the second link can be rotatably connected through the cooperation of the connecting portion and the gap portion, which has a simple structure, ingenious design, and easy assembly, thereby helping to reduce assembly costs.

[0014] In some embodiments, first limiting grooves are provided at opposite ends of the connecting shaft along the first direction, and the first limiting grooves are respectively used to connect with the two side plate connecting parts to limit the relative movement between the connecting shaft and the side plates along the first direction.

[0015] Thus, the relative movement between the connecting shaft and the side plate along the first direction can be limited, the possibility of the connecting shaft falling off can be reduced, and the connection reliability between the first link and the second link can be further improved. Moreover, since the first limiting groove limits the relative movement between the connecting shaft and the side plate along the first direction, the axial bearing capacity (lateral bearing capacity) of the drag chain can be further increased, thereby better protecting the pipelines bound thereon.

[0016] In some embodiments, the first plate body and the second plate body are bent along the first direction toward opposite directions to each other to form a first bending portion and a second bending portion; and a gap between the first bending portion and the second bending portion forms the gap portion.

[0017] Thus, the gap portion into which the connecting portion of the side plates of adjacent chain links is inserted can be formed in a simple manner, the molding method is simple, and the structural design is ingenious.

[0018] In some embodiments, a portion of the first plate connected to the first bending portion along the second direction and a portion of the second plate connected to the second bending portion along the second direction are welded to each other to form the connecting portion.

[0019] Thus, the side of the first plate body along the second direction facing away from the first bending portion and the side of the second plate body along the second direction facing away from the second bending portion can be welded to each other to form an integrated structure, thereby forming a stable connection portion, which makes it easier to insert the connection portion into the gap portion of the side plates of adjacent chain links to jointly form a side plate connection portion.

[0020] In some embodiments, the first bending portion and the second bending portion are provided with arc-shaped slots penetrating the first plate body and the second plate body along the first direction, and the connecting portion is provided with a through hole penetrating the first plate body and the second plate body along the first direction;

[0021] The drag chain also includes a limiting shaft;

[0022] At the side plate connecting portion, the limiting shaft passes through the arc-shaped slot hole and the through hole.

[0023] In this way, when the first link rotates relative to the second link, the limit shaft can move in the arc-shaped slot, thereby limiting the rotation angle between the first link and the second link, so that the first link and the second link can only rotate within a specified rotation range, thereby reducing the occurrence of adverse conditions such as excessive bending of the pipeline bound thereon due to excessive bending angle of the drag chain, thereby causing damage to the pipeline.

[0024] In some embodiments, in each of the first plates, the number of the arc-shaped slots is two, the two arc-shaped slots are arranged centrally symmetrically to each other, and,

[0025] In each of the second plates, the number of the arc-shaped slots is two, and the two arc-shaped slots are arranged symmetrically to each other.

[0026] When viewed along the first direction, the arc-shaped slot formed on the first plate body overlaps with the arc-shaped slot formed on the second plate body.

[0027] The number of the limiting axes is four.

[0028] Thereby, the rotation between the first link and the second link can be made more stable, and undesirable phenomena such as tilting caused by the different rotation amplitudes of the first link and the second link up and down can be reduced.

[0029] In some embodiments, second limiting grooves are provided at the opposite ends of the limiting shaft along the first direction, and the second limiting grooves are respectively used to cooperate with the arc-shaped slot holes in the side plates provided on the first plate body and the second plate body, thereby limiting the movement of the limiting shaft along the first direction.

[0030] Thereby, the possibility of the limiting shaft falling out of the arc-shaped slot hole can be reduced, so that the limiting shaft can well limit the rotation angle of the drag chain, and further improve the stability of the drag chain.

[0031] In some embodiments, a fixing bracket is provided on at least one surface of the chain plate body along a third direction, and the fixing bracket and the chain plate body together define a channel for pipelines to pass through; the third direction is perpendicular to both the first direction and the second direction.

[0032] Thus, the pipeline can be better restrained and more convenient to fix. In addition, fixing brackets can be provided on both surfaces of the chain plate body along the third direction, so as to increase the number of pipelines to be arranged.

[0033] Utility Model Effect

[0034] Since the first link and the second link of the drag chain are connected as a whole by a connecting shaft, in addition to being able to transmit torque through the connecting shaft so that the first link and the second link can rotate with each other, the connecting shaft has a stronger lateral load-bearing capacity and better support. Even when the drag chain is suspended sideways, it can better resist axial deformation, so that the drag chain is not prone to side bending, twisting and other undesirable conditions, which is conducive to improving the reliability of the drag chain. Moreover, the connection between the first link and the second link is tighter, which can also improve the lateral load-bearing capacity of the drag chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a three-dimensional structure of a drag chain provided in some embodiments of the present application;

[0036] Figure 2 A schematic diagram of a three-dimensional structure when a first link and a second link are connected to each other provided in some embodiments of the present application;

[0037] Figure 3 A schematic diagram of a three-dimensional structure of a first link or a second link provided in some embodiments of the present application;

[0038] Figure 4 A schematic diagram of the three-dimensional structure of a chain plate body provided in some embodiments of the present application;

[0039] Figure 5 A schematic diagram of a three-dimensional structure of a side panel provided in some embodiments of the present application;

[0040] Figure 6 A schematic diagram of a three-dimensional structure of a connecting shaft provided in some embodiments of the present application;

[0041] Figure 7 A schematic diagram of the three-dimensional structure of a limit shaft provided in some embodiments of the present application.

[0042] Description of Reference Numerals

[0043] 1-first link; 2-second link; 3-chain plate body; 31-first shaft cylinder; 32-second shaft cylinder; 4-side plate; 41-first plate body; 41a-first bending portion; 42-second plate body; 42a-second bending portion; 43-connecting portion; 431-through hole; 44-gap portion; 441-arc-shaped slot hole; 45-side plate connecting portion; 5-connecting shaft; 51-first limiting groove; 6-joint; 7-limiting shaft; 71-second limiting groove; 100-drag chain. DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0045] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limitation, but indicate that there is at least one, and if only "one" is referred to, it will be separately described. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0046] In some embodiments of the present application, for the convenience of description, a first direction, a second direction, and a third direction are set, and the first direction, the second direction, and the third direction are perpendicular to each other, but those skilled in the art should understand that the embodiments of the present application are not limited to the situation where the three directions are perpendicular to each other. Figures 1 to 7 As shown by the arrows in , the direction of arrow X is the first direction, the direction of arrow Y is the second direction, and the direction of arrow Z is the third direction.

[0047] like Figures 1 to 4As shown, the embodiment of the present application provides a drag chain 100, which includes at least one first link 1, at least one second link 2 and a connecting shaft 5. The first link 1 and the second link 2 are rotatably connected to each other. The first link 1 and the second link 2 each include a chain plate body 3 and two side plates 4. The two side plates 4 are arranged on opposite sides of the chain plate body 3 along the first direction. Each chain plate body 3 includes a first shaft cylinder 31 and a second shaft cylinder 32. The first shaft cylinder 31 and the second shaft cylinder 32 are arranged on opposite sides of the same chain plate body 3 along the second direction. The connecting shaft 5 passes through the side plate 4 of the first link 1, the side plate 4 of the second link 2, the first shaft cylinder 31 of the first link 1 and the second shaft cylinder 32 of the second link 2. The first link 1 and the second link 2 are hinged through the connecting shaft 5. The second direction is perpendicular to the first direction.

[0048] like Figure 1 As shown, the drag chain 100 includes at least one first link 1, at least one second link 2 and two joints 6, at least one first link 1 and at least one second link 2 are adjacent to each other and connected end to end, and the two joints 6 are respectively connected to the links located at the two ends, thereby forming a complete drag chain 100 structure. The design of the drag chain 100 enables it to adapt to the application scenario of reciprocating motion, and can effectively tow and protect the pipelines bound thereon.

[0049] Those skilled in the art should understand that the embodiment of the present application is only for the convenience of description to distinguish the links into the first link 1 and the second link 2. In fact, the structures of the first link 1 and the second link 2 are exactly the same. Each link and the link and the joint 6 can be disassembled, so that it is convenient for later replacement and maintenance.

[0050] The first link 1 and the second link 2 each include a link plate body 3 and two side plates 4, and the two side plates 4 are respectively located on opposite sides of the link plate body 3 along the first direction. The link plate body 3 is generally in the shape of a flat plate and is used to carry cables. Figure 2 As shown, the first chain link 1 and the second chain link 2 are articulated via a connecting shaft 5, so that the first chain link 1 and the second chain link 2 can be rotatably connected to each other.

[0051] Specifically, Figures 2 to 4As shown, the chain plate body 3 includes a first shaft cylinder 31 and a second shaft cylinder 32 on opposite sides along the second direction. The first shaft cylinder 31 and the second shaft cylinder 32 are cylindrical hollow structures for the connecting shaft 5 to pass through. In the embodiment of the present application, there are multiple first shaft cylinders 31 and second shaft cylinders 32. The multiple first shaft cylinders 31 are arranged at intervals from each other along the first direction and are located on one side of the chain plate body 3 along the second direction. The multiple second shaft cylinders 32 are arranged at intervals from each other along the first direction and are located on the other side of the chain plate body 3 along the second direction. When the first link 1 and the second link 2 are hinged to each other, the multiple first shaft cylinders 31 of the first link 1 and the multiple second shaft cylinders 32 of the second link 2 are alternately arranged and inserted into the gaps between each other, so that the connection strength between the first link 1 and the second link 2 can be improved. Moreover, due to the cross-connection in the axial direction (first direction), when the drag chain 100 is subjected to axial force, the first shaft cylinder 31 and the second shaft cylinder 32 abut against each other, thereby improving the axial bearing capacity (lateral bearing capacity) between the first link 1 and the second link 2, thereby reducing the possibility of adverse phenomena such as lateral bending and twisting of the drag chain 100.

[0052] In addition, the adjacent first shaft cylinder 31 and the second shaft cylinder 32 are arranged adjacent to each other, so that the possibility of dust or impurities entering into the shaft cylinders and affecting the rotation between the first link 1 and the second link 2 can be reduced.

[0053] Of course, those skilled in the art should understand that in some other embodiments, the first shaft cylinder 31 and the second shaft cylinder 32 may also be arranged in other ways, as long as the connecting shaft 5 can pass through smoothly and connect the chain plate body 3 of the first link 1 and the chain plate body 3 of the second link 2.

[0054] The embodiment of the present application does not specifically limit the number of the first shaft cylinder 31 and the second shaft cylinder 32 , and can be specifically set according to the actual size of the chain plate body 3 .

[0055] In the embodiment of the present application, the chain plate body 3 is located roughly in the middle position between the two side plates 4 along the third direction. In this way, the overall pivot connection between the first link 1 and the second link 2 can be achieved by only one connecting shaft 5, and the pipelines can be bound on the two opposite end surfaces of the chain plate body 3 along the third direction, thereby increasing the routing amount of the drag chain 100 and allowing the drag chain 100 to bind more pipelines.

[0056] In some other embodiments, the number of chain plate bodies 3 can also be two, the two chain plate bodies 3 are arranged at intervals along the third direction, and two connecting shafts 5 are used to connect the two chain plate bodies 3 respectively, and the pipeline can be constrained between the two chain plate bodies 3 or on the surfaces of the two chain plate bodies 3 facing away from each other.

[0057] In the embodiment of the present application, the two side plates 4 provided on opposite sides of the link plate body 3 along the first direction are also connected by the connecting shaft 5. Specifically, the connecting shaft 5 passes through the side plate 4 of the first link 1, the side plate 4 of the second link 2, the first shaft cylinder 31 of the first link 1, and the second shaft cylinder 32 of the second link 2, so that the first link 1 and the second link 2 are hinged through the connecting shaft 5.

[0058] Therefore, the first link 1 and the second link 2 can be hinged as a whole only by one connecting shaft 5, which reduces the number of parts and components and reduces the difficulty of assembly. In addition, the connection shaft 5 is used for hinge connection, so that the connection between the first link 1 and the second link 2 is tighter. On the premise of realizing the rotation of the first link 1 and the second link 2, the lateral load-bearing capacity and support of the drag chain 100 are stronger. In this way, even when the drag chain 100 is used in a side-standing suspension, it can have a good ability to resist axial deformation, so that the drag chain 100 is not prone to side bending, twisting and other undesirable phenomena, so that the pipelines bound thereon can be better protected, which is conducive to improving the reliability of the drag chain 100.

[0059] like Figure 1 As shown, the drag chain 100 includes a plurality of first links 1 and a plurality of second links 2 .

[0060] The embodiment of the present application does not specifically limit the number of the first links 1 and the number of the second links 2. The length of the drag chain 100 can be set according to actual conditions, and the number of the first links 1 and the second links 2 can be further set.

[0061] Exemplarily, the first link 1 and the second link 2 are hingedly connected via the connecting shaft 5 in a detachable manner, so that the links can be easily disassembled or installed, thereby better setting the specific number of the first link 1 and the second link 2 according to actual usage.

[0062] like Figure 5 As shown, the side plate 4 includes a first plate body 41 and a second plate body 42, the second plate body 42 is located on a side of the first plate body 41 close to the link plate body 3 along the first direction, one end of the first plate body 41 and the second plate body 42 along the second direction are connected to each other to form a connecting portion 43, and the other ends along the second direction are spaced apart from each other to form a gap portion 44, the connecting portion 43 of the side plate 4 of the second link 2 is inserted into the gap portion 44 of the side plate 4 of the first link 1 to form a side plate connecting portion 45, and the connecting shaft 5 passes through the side plate connecting portion 45.

[0063] Thus, the side plate 4 of the first link 1 and the side plate 4 of the second link 2 can be rotatably connected by the cooperation of the connecting portion 43 and the gap portion 44, which has a simple structure, ingenious design, and easy assembly, thereby helping to reduce assembly costs.

[0064] Specifically, the first plate body 41 and the second plate body 42 are bent in opposite directions along the first direction to form a first bending portion 41a and a second bending portion 42a. The gap between the first bending portion 41a and the second bending portion 42a forms the gap portion 44.

[0065] In this way, the gap portion 44 for the connecting portion 43 of the side plate 4 of the adjacent link to be inserted can be formed in a simple manner, the molding method is simple, and the structural design is ingenious.

[0066] Exemplarily, the first plate body 41 and the second plate body 42 may be made of metal materials, including but not limited to steel, aluminum, stainless steel, aluminum alloy, and the like.

[0067] In the embodiment of the present application, a portion of the first plate body 41 connected to the first bending portion 41a along the second direction and a portion of the second plate body 42 connected to the second bending portion 42a along the second direction are welded to each other to form a connecting portion.

[0068] Thus, the side of the first plate body 41 along the second direction facing away from the first bending portion 41a and the side of the second plate body 42 along the second direction facing away from the second bending portion 42a can be welded to each other to form an integrated structure, thereby forming a stable connection portion 43, which makes it easier to insert the connection portion 43 into the gap portion 44 of the side plate 4 of the adjacent chain link to jointly form a side plate connection portion 45.

[0069] In addition, the first plate body 41 and the second plate body 42 made of metal material have higher strength, so that the drag chain 100 has better stability and stronger load-bearing capacity.

[0070] Of course, those skilled in the art should understand that in some other embodiments, the first plate body 41 and the second plate body 42 may also be made of any other suitable material, and the connecting portion 43 and the gap portion 44 may also be formed by any other suitable molding method.

[0071] like Figure 6 As shown, the first limiting grooves 51 are provided at the two opposite ends of the connecting shaft 5 along the first direction, and the first limiting grooves 51 are respectively used to cooperate with the two side plate connecting parts 45, so as to limit the relative movement between the connecting shaft 5 and the side plate 4 along the first direction, reduce the possibility of the connecting shaft 5 falling off, and further improve the connection reliability of the first link 1 and the second link 2. Moreover, since the first limiting grooves 51 limit the relative movement between the connecting shaft 5 and the side plate 4 along the first direction, the axial bearing capacity of the drag chain 100 can be further increased, so as to better protect the pipelines bound thereon.

[0072] like Figure 2 and Figure 7As shown, the drag chain 100 further includes a limiting shaft 7. The first bending portion 41a and the second bending portion 42a are provided with an arc-shaped slot 441 penetrating the first plate body 41 and the second plate body 42 along the first direction, and the connecting portion 43 is provided with a through hole 431 penetrating the first plate body 41 and the second plate body 42 along the first direction. At the side plate connecting portion 45, the limiting shaft 7 passes through the arc-shaped slot 441 and the through hole 431.

[0073] In this way, when the first link 1 rotates relative to the second link 2, the limit shaft 7 can move in the arc-shaped slot 441, thereby limiting the rotation angle between the first link 1 and the second link 2, so that the first link 1 and the second link 2 can only rotate within a specified rotation range, thereby reducing the occurrence of adverse conditions such as excessive bending of the pipeline bound thereon due to excessive bending angle of the drag chain 100, thereby causing damage to the pipeline.

[0074] Specifically, in each first plate body 41, there are two arc-shaped slots 441, which are arranged symmetrically with respect to each other, and in each second plate body 42, there are two arc-shaped slots 441, which are arranged symmetrically with respect to each other. When viewed along the first direction, the arc-shaped slots 441 formed in the first plate body 41 overlap with the arc-shaped slots 441 formed in the second plate body 42.

[0075] The number of through holes 431 formed on the connecting portion 43 is also two, and the two through holes 431 are also arranged in a central symmetrical manner. In the side plate connecting portion 45, the positions of the through holes 431 and the arc-shaped slot holes 441 correspond to each other, and a limiting shaft 7 passes through a corresponding arc-shaped slot hole 441 and a through hole 431.

[0076] In the embodiment of the present application, the number of the limiting shafts 7 is four.

[0077] Thus, the rotation between the first link 1 and the second link 2 can be made more stable, and undesirable phenomena such as tilting caused by the different rotation amplitudes of the first link 1 and the second link 2 up and down can be reduced.

[0078] like Figure 7 As shown, second limiting grooves 71 are provided at opposite ends of the limiting shaft 7 along the first direction, and the second limiting grooves 71 are respectively used to cooperate with the arc-shaped slots 441 provided on the first plate body 41 and the second plate body 42 in the side plate 4, so as to limit the movement of the limiting shaft 7 along the first direction.

[0079] Thereby, the possibility of the limiting shaft 7 falling out of the arc-shaped slot 441 can be reduced, so that the limiting shaft 7 can well limit the rotation angle of the drag chain 100, and further improve the stability of the drag chain 100.

[0080] Although not shown in the figure, a fixing bracket is provided on at least one surface of the chain plate body 3 along the third direction, and the fixing bracket and the chain plate body 3 together define a channel for the pipeline to pass through. The third direction is perpendicular to both the first direction and the second direction.

[0081] In this way, the pipeline can be better restrained and more conducive to the fixation of the pipeline.

[0082] In the embodiment of the present application, fixed brackets are provided on both surfaces of the chain plate body 3 along the third direction, so as to increase the number of pipeline arrangements.

[0083] In some other embodiments, the chain plate body 3 may also be provided with a fixing bracket on only one surface, which is not specifically limited in the embodiments of the present application.

[0084] Exemplarily, the fixing bracket may be detachably provided on the chain plate body 3, so that the fixing bracket can be removed or installed according to actual use requirements.

[0085] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A drag chain, characterized in that: The drag chain comprises: at least one first link and at least one second link, the first link and the second link are rotatably connected to each other, the first link and the second link each include a chain plate body and two side plates, the two side plates are arranged on opposite sides of the chain plate body along a first direction, each of the chain plate bodies includes a first shaft cylinder and a second shaft cylinder, the first shaft cylinder and the second shaft cylinder are arranged on opposite sides of the same chain plate body along a second direction; A connecting shaft, the connecting shaft passing through the side plate of the first chain link, the side plate of the second chain link, the first shaft cylinder of the first chain link and the second shaft cylinder of the second chain link, the first chain link and the second chain link being hingedly connected via the connecting shaft; The second direction is perpendicular to the first direction.

2. The drag chain according to claim 1, characterized in that: The drag chain includes a plurality of the first links and a plurality of the second links.

3. The drag chain according to claim 2, characterized in that: The side plate includes a first plate body and a second plate body, the second plate body is located on a side of the first plate body close to the chain plate body along the first direction, one end of the first plate body and the second plate body along the second direction are connected to each other to form a connecting portion, and the other ends along the second direction are spaced from each other to form a gap portion, the connecting portion of the side plate of the second chain link is inserted into the gap portion of the side plate of the first chain link to form a side plate connecting portion; the connecting shaft passes through the side plate connecting portion.

4. The drag chain according to claim 3, characterized in that: The connecting shaft is provided with first limiting grooves at two opposite ends along the first direction, and the first limiting grooves are respectively used to cooperate with the two side plate connecting parts to limit the relative movement between the connecting shaft and the side plates along the first direction.

5. The drag chain according to claim 3, characterized in that: The first plate body and the second plate body are bent in opposite directions along the first direction to form a first bending portion and a second bending portion; and a gap between the first bending portion and the second bending portion forms the gap portion.

6. The drag chain according to claim 5, characterized in that: A portion of the first plate body connected to the first bending portion along the second direction and a portion of the second plate body connected to the second bending portion along the second direction are welded to each other to form the connecting portion.

7. The drag chain according to claim 5, characterized in that: The first bending portion and the second bending portion are provided with arc-shaped slots penetrating the first plate body and the second plate body along the first direction, and the connecting portion is provided with a through hole penetrating the first plate body and the second plate body along the first direction; The drag chain also includes a limiting shaft; At the side plate connecting portion, the limiting shaft passes through the arc-shaped slot hole and the through hole.

8. The drag chain according to claim 7, characterized in that: In each of the first plates, the number of the arc-shaped slots is two, the two arc-shaped slots are arranged centrally symmetrically to each other, and, In each of the second plates, the number of the arc-shaped slots is two, and the two arc-shaped slots are arranged symmetrically to each other. When viewed along the first direction, the arc-shaped slot formed on the first plate body overlaps with the arc-shaped slot formed on the second plate body. The number of the limiting axes is four.

9. The drag chain according to claim 7, characterized in that: The limiting shaft is provided with second limiting grooves at opposite ends along the first direction, and the second limiting grooves are used to respectively cooperate with the arc-shaped slot holes in the side plates provided on the first plate body and the second plate body, thereby limiting the movement of the limiting shaft along the first direction.

10. The drag chain according to claim 1, characterized in that: A fixing bracket is provided on at least one surface of the chain plate body along the third direction, and the fixing bracket and the chain plate body together define a channel for the pipeline to pass through; The third direction is perpendicular to both the first direction and the second direction.

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