A long distance anti-collapse drag chain

Abstract

The invention discloses a long-distance anti-collapse drag chain, comprising a first joint group, a second joint member and a plurality of drag block groups, wherein the drag block group comprises two first chain plates with symmetrical structures and connecting members arranged at the upper and lower sides of the first chain plates, wherein a connecting groove is provided on the inner side of the first chain plate, a connecting block is extended at one end of the first chain plate, and the connecting block matches the connecting groove, and an arc-shaped boss and an arc-shaped recess are also provided on the first chain plate, a supporting column is fixedly connected to the arc-shaped boss, a supporting hole is provided on the arc-shaped recess, and the supporting column matches the supporting hole, so as to facilitate the lever support and opening and closing between the plurality of drag block groups, and fixing grooves are provided at both ends of the connecting member, and fixing columns are fixedly connected to the upper and lower inner walls of the first chain plate, and the fixing columns are sleeved in the fixing grooves and matched with the fixing grooves. The invention opens and closes the drag block group through the support column, and converts the bearing weight between the drag block groups into the longitudinal tension of the lower part and the top force of the upper part, so as to achieve the effect that the drag chain does not collapse, is not disjointed, and does not break.

Description

Technical Field

[0001] The invention belongs to the technical field of drag chain equipment, and in particular relates to a long-distance anti-collapse drag chain. Background Art

[0002] At present, drag chains have been widely used in many fields such as CNC machine tools, stone machinery, glass machinery, door and window machinery, injection molding machines, manipulators, lifting and transportation equipment, and automated warehouses. Drag chains can play a role in traction and protection of cables, oil pipes, air pipes, water pipes, etc. built into the machinery, and at the same time make the machinery look more beautiful as a whole. The existing drag chains are mostly composed of several drag block groups. When the drag chain is in use, it can be divided into three parts according to the state of motion: the lower section of the drag chain, the steering ring section, and the upper section of the drag chain. The existing drag chain has a small hanging load capacity. When the drag chain is long, the drag chain will bend to varying degrees under its own weight and the built-in cables and pipes. This bending phenomenon will damage the built-in cables and pipes of the drag chain. If the drag chain is subjected to too much force, it may even cause the upper section of the drag chain to overlap the lower section of the drag chain, commonly known as "collapsed waist". If the upper section of the drag chain and the lower section of the drag chain are constantly rubbed for a long time, it will not only damage the built-in lines, but also seriously wear the drag chain, causing the drag chain to be disconnected and broken, and seriously shortening the service life of the drag chain.

[0003] The existing solution to the above technical problems is usually to set a follow-up support mechanism that follows the movement of the drag chain under the long-distance drag chain to support the long-distance drag chain and avoid the "collapse" phenomenon. Although the follow-up support mechanism solves the technical problem of the collapse of the drag chain, for long-distance drag chains, the length of the drag chain follow-up bracket that matches it is also relatively long. This kind of follow-up bracket of the long-distance drag chain is not only expensive and difficult to manage in the later stage, but also not very stable and very prone to failure. In addition, the follow-up support mechanism is only suitable for the long-distance drag chain to run at a low speed. When the long-distance drag chain reciprocates at a high speed, it will cause the drag chain to be partially disconnected. In addition, when it moves at a high speed for a long time, the follow-up support mechanism will cause greater wear on the drag chain, which will seriously affect the operating reliability of the drag chain and shorten the service life of the drag chain.

[0004] Therefore, how to design a drag chain that will not collapse during long-distance turnover work, has a long service life and has guaranteed quality has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a long-distance anti-collapse drag chain to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above invention purpose, the technical solution adopted is:

[0007] A long-distance anti-collapse drag chain, comprising a plurality of drag block groups, a first connector and a second connector, wherein the plurality of drag block groups are arranged between the first connector and the second connector and are respectively connected to the first connector and the second connector, and the plurality of drag block groups are limitedly hinged at the head and tail, and the drag block group comprises two first chain plates with symmetrical structures and positions and connectors which are arranged at the upper and lower sides of the first chain plates and are used to connect the first chain plates and load-bearing cables or pipelines, a connecting groove is provided on the inner side of the first chain plate, a connecting block extends from one end of the first chain plate, the connecting block is integrally formed with the first chain plate, the connecting block matches the connecting groove and is slidably connected to the connecting groove, an arc-shaped boss is provided at the lower inner side of the first chain plate and close to the connecting groove, an arc-shaped recess is provided at one end of the first chain plate and close to the connecting block, and the arc-shaped boss matches the arc-shaped recess, wherein, A support column is fixedly connected to the arc-shaped boss, and a support hole is opened on the arc-shaped recessed platform. The support column matches the support hole to facilitate the lever support and opening and closing of the plurality of drag block groups. Fixed grooves are respectively provided at both ends of the connecting piece, and fixed columns are fixedly connected to the upper and lower inner walls of the first chain plate. The fixed columns are sleeved in the fixed grooves. The drag block groups are opened and closed by the support columns, and the bearing gravity between the drag block groups is converted into the longitudinal tension at the bottom and the top force at the top, thereby increasing the strength and bearing capacity of the drag chain and effectively preventing the deformation and collapse of the drag chain.

[0008] The present invention is further configured as follows: a limit block is provided on the outer side of the first chain plate and located at the connecting block, and a fan-shaped limit groove is opened on the inner side of the first chain plate and close to the connecting groove, and the limit block slides in the fan-shaped limit groove and respectively abuts against the inner walls of the groove body on both sides of the fan-shaped limit groove.

[0009] The present invention is further configured as follows: the first joint member includes two second chain plates with symmetrical structures and positions, the two second chain plates are fixedly connected by the connecting members located on the upper and lower sides thereof, a joint groove is provided on the inner side of the second chain plate, the joint groove matches the connecting block, a joint boss is provided on the inner side of the second chain plate and close to the joint groove, the joint boss matches the arc-shaped recess, a joint column is fixedly connected to the joint boss, the joint column matches the support hole, so as to facilitate the lever support and opening and closing between the drag block group and the first joint member.

[0010] The present invention is further configured as follows: a first clamping groove for connecting to an external device is provided at one end of the second chain plate away from the drag block assembly, and the first clamping groove is integrally formed with the second chain plate.

[0011] The present invention is further configured as follows: the second joint member includes two third chain plates with symmetrical structures and positions, the two third chain plates are fixedly connected by the connecting members located on the upper and lower sides thereof, a joint block is provided on the inner side of the third chain plate, the joint block matches the connecting groove, a joint recess is provided on the outer side of the third chain plate and close to the joint block, the joint recess matches the arc-shaped boss, a joint hole is provided on the joint recess, the joint hole matches the support column, so as to facilitate the lever support and opening and closing between the drag block group and the second joint member.

[0012] The present invention is further configured as follows: a second clamping groove for connecting an external device is provided at one end of the third chain plate away from the drag block group, and the second clamping groove is integrally formed with the third chain plate.

[0013] The present invention is further configured as follows: a clamping block is integrally connected to the fixing column, and clamping grooves are symmetrically provided on the connecting member at the fixing grooves at both ends thereof, and the clamping grooves are clamped with the clamping block.

[0014] The present invention is further configured as follows: a positioning groove is provided at one side edge of the connecting groove, a positioning block is provided at one side edge of the connecting block, and the positioning groove and the positioning block are both designed in an arc shape and match each other.

[0015] The present invention is further configured such that: the first chain plate and the connecting member are both formed by one-step injection molding.

[0016] The present invention is further configured as follows: a first slide groove is provided on the outer side of the first chain plate and close to the arc-shaped concave platform, and a first slider is provided on the inner side of the first chain plate and close to the arc-shaped convex platform, and the first slider matches the first slide groove.

[0017] In summary, compared with the prior art, the present invention discloses a long-distance anti-collapse drag chain comprising a first connector, a second connector and a plurality of drag block groups, wherein the first connector and the second connector are used for external connection, the plurality of drag block groups are placed between the first connector and the second connector and are hinged end to end, the drag block group comprises a first chain plate and a connecting member, the connecting member is used to fix the first chain plates which are mirror images of each other, the arc-shaped boss arranged at the lower inner side of the first chain plate matches the connecting block extending from one end of the first chain plate, so as to facilitate the end to end connection of the first chain plates between the plurality of drag block groups, at the same time, a supporting column is fixedly connected to the arc-shaped boss, a supporting hole is provided on the arc-shaped recess, and the supporting column matches the supporting hole, that is, through this arrangement, the hinge between the plurality of first chain plates is realized, and with the cooperation of the arc-shaped boss and the arc-shaped recess, the support column located at the lower side of the first chain plate is used as a fulcrum to realize the limited opening, closing and bending between the plurality of drag block groups, share the vertical gravity borne by the connecting member, thereby preventing the collapse of the drag chain and improving the service life of the drag chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of a long-distance anti-collapse drag chain provided in this embodiment;

[0020] Figure 2 is a schematic diagram of the overall structure of the drag block group provided in this embodiment;

[0021] Figure 3 is a schematic diagram of the overall structure of the first connector provided in this embodiment;

[0022] Figure 4 is a schematic diagram of the overall structure of the second connector provided in this embodiment;

[0023] Figure 5 is a schematic diagram of the overall structure of the first chain plate provided in this embodiment;

[0024] Figure 6 It is a schematic diagram of the overall structure of the first chain plate provided in this embodiment in another direction.

[0025] 1, first link plate; 2, second link plate; 3, third link plate; 4, fourth link plate; 5, fifth link plate; 6, fifth link plate; 7, sixth link plate; 8, eighth link plate; 9, ninth link plate; 10, first link plate; 11, second link plate; 12, first link plate; 13, second link plate; 14, third link plate; 15, fourth link plate; 16, fifth link plate; 17, fifth link plate; 18, fifth link plate; 19, fifth link plate; 2, fifth link plate; 3, sixth link plate; 4, sixth link plate; 5, eighth link plate; 6, eighth link plate; 7, eighth link plate; 8, eighth link plate; 9, eighth link plate; 10, first link plate; 11, first link plate; 12, third link plate; 13, first link plate; 14, third link plate; 15, fourth link plate; 16, fifth link plate; 17, fifth link plate; 18, fifth link plate; 19, fifth link plate; 2, fifth link plate; DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, it can also be the internal communication of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other.

[0030] A long distance anti-collapse drag chain, such as Figure 1-Figure 6 As shown in the figure, it includes a plurality of drag block groups 100, a first connector 200 and a second connector 300, wherein the plurality of drag block groups 100 are arranged between the first connector 200 and the second connector 300 and are respectively connected to the first connector 200 and the second connector 300, and the plurality of drag block groups 100 are limitedly hinged between the head and tail, and the drag block group 100 includes two first chain plates 1 with symmetrical structures and positions and connectors 2 which are arranged at the upper and lower sides of the first chain plate 1 and are used to connect the first chain plate 1 and the carrying cable or pipeline, a connecting groove 11 is provided on the inner side of the first chain plate 1, a connecting block 12 is extended at one end of the first chain plate 1, the connecting block 12 is integrally formed with the first chain plate 1 and the connecting block 12 matches the connecting groove 11 and is slidably connected to the connecting groove 11, an arc-shaped boss 13 is provided at the lower inner side of the first chain plate 1 and close to the connecting groove 11, an arc-shaped recess 14 is provided at one end of the first chain plate 1 and close to the connecting block 12, and the arc-shaped boss 13 and the arc-shaped recess 14 are connected. The arc-shaped boss 13 is fixedly connected with a support column 131 , and the arc-shaped recessed platform 14 is provided with a support hole 141 . The support column 131 matches the support hole 141 , so as to facilitate the lever support and opening and closing between the plurality of drag block groups 100 .

[0031] During the specific implementation process, the first connector 200 and the second connector 300 are respectively connected to external devices, and a plurality of drag block groups 100 connected end to end are located between the first connector 200 and the second connector 300. The cable or pipeline is carried by the connector 2, and the two ends of the connector 2 are fixedly connected to the symmetrically arranged first chain plate 1, wherein the two ends of the connector 2 are respectively provided with fixing grooves 21, and the upper and lower inner walls of the first chain plate 1 are fixedly connected with fixing columns 15, and the fixing columns 15 are sleeved in the fixing grooves 21 to strengthen the connection relationship between the connector 2 and the first chain plate 1.

[0032] It should be noted that a clamping block 151 is integrally connected to the fixing column 15, and clamping grooves 211 are symmetrically opened on the connecting member 2 and at the fixing grooves at both ends thereof, and the clamping grooves 211 are clamped with the clamping block 151. That is, through this arrangement, the firmness between the connecting member 2 and the first chain plate 1 is further strengthened, the carrying capacity of the drag block group 100 is improved, and its practicality is improved.

[0033] like Figure 2 , Figure 5 and Figure 6 As shown, the connecting groove 11 provided on the inner side of the first chain plate 1 matches with the connecting block 12 provided at one end of the first chain plate 1 and is slidably connected to each other, so as to realize the end-to-end connection between multiple drag block groups 100, wherein the arc-shaped boss 13 on the inner side of the first chain plate 1 near the connecting groove 11 matches with the arc-shaped recessed platform 14 near the connecting block 12, so as to assist the sliding of the connecting groove 11 and the connecting block 12, so that the multiple drag block groups 100 are matched more closely, and at the same time, the supporting column 131 fixedly connected to the arc-shaped boss 13 matches with the supporting hole 141 provided on the arc-shaped recessed platform 14, that is, the supporting column 131 is used as a fulcrum and a rotation point to provide a lever support for the drag block group 100, and the first chain plate 1 is opened and closed with the supporting column 131 as the axis to realize the bending of multiple drag block groups 100.

[0034] In the specific implementation process, a limit block 16 is provided on the outer side of the first chain plate 1 and located at the connecting block 12, and a fan-shaped limit groove 17 is opened on the inner side of the first chain plate 1 and close to the connecting groove 11. The limit block 16 slides in the fan-shaped limit groove 17 and respectively abuts against the inner wall surfaces 171 of the limit groove on both sides of the fan-shaped limit groove 17. That is, when multiple drag block groups 100 are bent due to external environmental requirements, the limit blocks 16 matching the fan-shaped limit grooves 17 are used to limit the bending of the drag block groups 100, thereby achieving the purpose of limited hinge. At the same time, the limit blocks 16 abut against the inner wall surfaces 171 of the limit grooves, and cooperate with the support of the support column 131, so as to realize the conversion of the load-bearing gravity between the drag block groups 100 into the longitudinal tension of the lower part and the top force of the upper part, thereby increasing the strength and load-bearing capacity of the drag chain, and effectively preventing the deformation and collapse of the drag chain.

[0035] It should be noted that the specific curvature of the sector-shaped limiting groove 17 depends on the specific application environment, and the specific curvature of the sector-shaped limiting groove 17 is not limited here.

[0036] It should be noted that the arc-shaped boss 13 is located at the lower inner side of the first chain plate 1, that is, the support column 131 is located at the lower inner side of the first chain plate. The support column 131 arranged here plays the role of connecting multiple first chain plates 1, ensuring that the support column 131 below the first chain plate 1 supports the upper connecting groove 11 and the connecting block 12 open and close, thereby sharing the gravity of the cable or pipeline carried by the connecting member 2, and partially transferring it into the longitudinal tension between the first chain plates 1, thereby improving the overall load capacity of the drag chain and preventing the drag chain from collapsing and deforming.

[0037] like Figure 1 and Figure 3 As shown, the first joint member 200 includes two second chain plates 3 with symmetrical structures and positions, and the two second chain plates 3 are fixedly connected by connecting members 2 located on the upper and lower sides thereof. A joint groove 31 is provided on the inner side of the second chain plate 3, and the joint groove 31 matches the connecting block 12. A joint boss 32 is provided on the inner side of the second chain plate 3 and close to the joint groove 31, and the joint boss 32 matches the arc-shaped recess 14. A joint column 321 is fixedly connected to the joint boss 32, and the joint column 321 matches the support hole 141, so as to facilitate the lever support and opening and closing between the drag block group 100 and the first joint member 200.

[0038] Furthermore, a first clamping groove 33 for connecting an external device is provided at one end of the second chain plate 3 away from the drag block assembly 100 . The first clamping groove 33 is integrally formed with the second chain plate 3 , thereby enhancing the connection strength of the first connector 200 .

[0039] In the specific implementation process, the joint groove 31, the joint boss 32 and the joint column 321 play the role of the connecting groove 11, the arc boss 13 and the support column 131 correspondingly, with the purpose of stabilizing the matching relationship between the first joint member 200 and the drag block group 100, so as to ensure the effective opening and closing between the first joint member 200 and the drag block group 100 under the support of the joint column 321, thereby sharing part of the gravity pressure of the drag chain load.

[0040] like Figure 1 and Figure 4As shown, the second joint member 300 includes two third chain plates 4 with symmetrical structures and positions. The two third chain plates 4 are fixedly connected by connecting members 2 located on the upper and lower sides thereof. A joint block 41 is provided on the inner side of the third chain plate 4, and the joint block 41 matches the connecting groove 11. A joint recess 42 is provided on the outer side of the third chain plate 4 and close to the joint block 41, and the joint recess 42 matches the arc-shaped boss 13. A joint hole 421 is provided on the joint recess 42, and the joint hole 421 matches the support column 131, so as to facilitate the lever support and opening and closing between the drag block group 100 and the second joint member 300.

[0041] Furthermore, a second clamping groove 43 for connecting an external device is provided at one end of the third chain plate 4 away from the drag block assembly 100 . The second clamping groove 43 is integrally formed with the third chain plate 4 , thereby enhancing the connection strength of the second connector 300 .

[0042] In the specific implementation process, by the same principle, the joint block 41, the joint recess 42 and the joint hole 421 correspondingly play the role of the connecting block 12, the arc recess 14 and the supporting hole 141, with the purpose of stabilizing the matching relationship between the second joint member 300 and the drag block group 100, so as to ensure the effective opening and closing between the second joint member 300 and the drag block group 100 under the support of the support column 131, thereby sharing part of the gravity pressure of the drag chain load.

[0043] It should be noted that the first chain plate 1 and the connecting member 2 are both formed by one-step injection molding.

[0044] like Figure 5 and Figure 6 As shown, a positioning groove 18 is provided at one side edge of the connecting groove 11, and a positioning block 19 is provided at one side edge of the connecting block 12. The positioning groove 18 and the positioning block 19 are both designed in an arc shape and match each other. That is, through this arrangement, the connecting grooves 11 and the connecting blocks 12 between the multiple first chain plates 1 can be accurately matched during the opening and closing process, and at the same time, the firmness between the multiple first chain plates 1 can be deepened. Under the premise of cooperating with the fan-shaped limit grooves 17 and the limit blocks 16, the connecting grooves 11 and the connecting blocks 12 are guided to slide against each other, ensuring that the multiple drag block groups 100 are tightly connected and stably bent.

[0045] Furthermore, a first slide groove 142 is provided on the outer side of the first chain plate 1 and close to the arc-shaped recessed platform 14, and a first slider 132 is provided on the inner side of the first chain plate 1 and close to the arc-shaped protrusion 13. The first slider 132 matches the first slide groove 142, that is, through this arrangement, the matching relationship between the multiple first chain plates 1 is further strengthened. On the basis of the matching of the support column 131 and the support hole 141, the connection relationship between the multiple first chain plates 1 and the multiple drag block groups 100 is strengthened successively through the connecting groove 11 and the connecting block 12, the limiting block 16 and the fan-shaped limiting groove 17, the positioning groove 18 and the positioning block 19, and the first slider 132 and the first slide groove 142, thereby improving the connection strength and assembly strength of the drag chain, improving the carrying capacity of the drag chain, and improving the practical performance of the drag chain.

[0046] In summary, the present invention has the following beneficial effects: a long-distance anti-collapse drag chain disclosed by the present invention comprises a plurality of drag block groups 100, wherein the plurality of drag block groups 100 are respectively connected to a first joint member 200 and a second joint member 300 and the plurality of drag block groups 100 are limitedly hinged at the head and tail, wherein the drag block group 100 comprises a first chain plate 1 and a connector 2, wherein the first chain plate 1 is provided with a connecting groove 11 and a connecting block 12, wherein the connecting groove 11 and the connecting block 12 match and slide with each other, wherein an arc-shaped boss 13 is provided at the connecting groove 11, and an arc-shaped recess 14 is provided at the connecting block 12, wherein the arc-shaped boss 13 matches the arc-shaped recess 14, wherein a support column 131 is fixedly connected to the arc-shaped boss 13, a support hole 141 is provided on the arc-shaped recess 14, and the support column 131 matches the support hole 141, further, The first chain plate 1 is also provided with a limit block 16 and a fan-shaped limit groove 17. The limit block 16 slides in the fan-shaped limit groove 17 and abuts against the inner wall of the groove on both sides of the fan-shaped limit groove 17. That is, through the above arrangement, the drag chain is supported by the support column 131 when it bends and deforms accordingly with the environment and equipment displacement during operation. The limit block 16 slides in the fan-shaped limit groove 17 to guide the bending between the two drag block groups 100. The first joint member 200 and the second joint member 300 also apply this principle to realize the opening and closing between the connecting groove 11 and the connecting block 12. The limit block 16 abuts against the inner wall of the groove on both sides of the fan-shaped limit groove 17 to limit the drag block group 100. The bending angle between the drag block groups 100 is used to realize the limited articulation between the multiple drag block groups 100, that is, the support column 131 is used as a lever support to realize limited bending, so as to avoid excessive deformation of the drag chain due to excessive turning angle of the drag block group 100, causing damage to the cables or pipelines carried by the connecting piece 2, and also avoid accidental friction between the drag block groups 100, thereby improving the load capacity of the drag chain, solving the problems of sagging, collapse and breakage of the drag chain, and increasing the service life of the drag chain.

[0047] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A long-distance anti-collapse drag chain, comprising a plurality of drag block groups, a first connector and a second connector, wherein the plurality of drag block groups are arranged between the first connector and the second connector and are respectively connected to the first connector and the second connector, and the plurality of drag block groups are limitedly hinged between the head and the tail, characterized in that: The drag block group includes two first chain plates with symmetrical structures and positions and connectors respectively arranged at the upper and lower sides of the first chain plates and used to connect the first chain plates and the carrying cables or pipelines. A connecting groove is provided on the inner side of the first chain plate, and a connecting block is extended at one end of the first chain plate. The connecting block is integrally formed with the first chain plate and the connecting block matches the connecting groove and is slidably connected to the connecting groove. An arc-shaped boss is provided at the lower inner side of the first chain plate and close to the connecting groove, and an arc-shaped recess is provided at one end of the first chain plate and close to the connecting block, and the arc-shaped boss matches the arc-shaped recess, wherein a support column is fixedly connected to the arc-shaped boss, and a support column is provided on the arc-shaped recess The supporting hole is matched with the supporting hole to facilitate the lever support and opening and closing of the plurality of drag block groups. The two ends of the connecting member are respectively provided with fixing grooves. The upper and lower inner walls of the first chain plate are fixedly connected with fixing columns, and the fixing columns are sleeved in the fixing grooves. Thus, the drag block group is opened and closed by using the supporting columns, and the bearing gravity between the drag block groups is converted into the longitudinal tension at the bottom and the top force at the top, thereby increasing the strength and bearing capacity of the drag chain and effectively preventing the deformation and collapse of the drag chain. A limit block is provided on the outer side of the first chain plate and at the connecting block, and a fan-shaped limit groove is provided on the inner side of the first chain plate and close to the connecting groove. The limit block slides in the fan-shaped limit groove and is respectively engaged with the two sides of the fan-shaped limit groove. The inner wall of the groove body abuts; the first joint member includes two second chain plates with symmetrical structures and positions, and the two second chain plates are fixedly connected by the connecting members located on the upper and lower sides thereof; a joint groove is provided on the inner side of the second chain plate, and the joint groove matches the connecting block; a joint boss is provided on the inner side of the second chain plate and close to the joint groove, and the joint boss matches the arc-shaped recessed platform; a joint column is fixedly connected to the joint boss, and the joint column matches the supporting hole, so as to facilitate the lever support and opening and closing between the drag block group and the first joint member; a first clamping groove for connecting an external device is provided at one end of the second chain plate away from the drag block group, and the first clamping groove is connected to the second chain plate The second connector comprises two third chain plates with symmetrical structures and positions, the two third chain plates are fixedly connected by the connecting members located at the upper and lower sides thereof, a connector block is provided on the inner side of the third chain plate, the connector block matches the connecting groove, a connector recess is provided on the outer side of the third chain plate and close to the connector block, the connector recess matches the arc-shaped boss, a connector hole is provided on the connector recess, the connector hole matches the support column, so as to facilitate the lever support and opening and closing between the drag block group and the second connector; a second clamping groove for connecting an external device is provided at one end of the third chain plate away from the drag block group, and the second clamping groove is integrally formed with the third chain plate;A clamping block is integrally connected to the fixing column, and clamping slots are symmetrically provided on the fixing slots at both ends of the connecting piece, and the clamping slots are clamped with the clamping blocks; a positioning slot is provided at one side edge of the connecting slot, and a positioning block is provided at one side edge of the connecting block, and the positioning slot and the positioning block are both arc-shaped and matched; the first chain plate and the connecting piece are both injection molded at one time; a first slide groove is provided on the outer side of the first chain plate and close to the arc-shaped concave platform, and a first slider is provided on the inner side of the first chain plate and close to the arc-shaped convex platform, and the first slider matches the first slide groove. ;

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