High load chain

Abstract

The present invention discloses a high-load drag chain, belonging to the technical field of drag chains. In the high-load drag chain of the present invention, in the first state, two connected chain links abut against the fifth abutment portion of the other through the first abutment portion of one of them, and the first convex portion of one of them abuts against the side wall of the second groove of the other, and the third abutment portion of one of them abuts against the seventh abutment portion of the other, and the second convex portion of one of them abuts against the side wall of the first groove of the other, thereby having four force points; in the second state, the second abutment portion of one of them abuts against the sixth abutment portion of the other, and the first convex portion of one of them abuts against the side wall of the second groove of the other, and the fourth abutment portion of one of them abuts against the eighth abutment portion of the other, and the second convex portion of one of them abuts against the side wall of the first groove of the other, thereby also having four force points, compared with the prior art, the number of force points is increased, and the load capacity of the drag chain is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drag chains, in particular to high-load drag chains. Background Art

[0002] A drag chain is a device used to restrain cables, wires, pipes and other structures to facilitate their rotation and movement. It is often used in reciprocating motion situations and can pull and protect the built-in cables, wires, pipes and other structures.

[0003] The drag chain is formed by hingedly connecting a plurality of links in sequence, and one of the two connected links can swing relative to the other, so that the two connected links have a first state and a second state. In other words, the two connected links can switch between the first state and the second state. Specifically, Figure 1 As shown, the chain link 100 has a contact portion 101 and a contact portion 2 102, and a contact portion 3 103 and a contact portion 4 104 arranged corresponding to the contact portion 101. In the first state, the contact portion 101 of one of the two connected chain links 100 abuts against the contact portion 3 103; in the second state, the contact portion 2 102 of one of the two connected chain links 100 abuts against the contact portion 4 104. In other words, the two connected chain links 100 have only one force point in both the first state and the second state, resulting in poor load capacity of the drag chain and failure to meet user needs. Summary of the invention

[0004] The purpose of the present invention is to provide a high-load drag chain, which increases the stress points of the chain links and improves the load capacity of the drag chain.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] On the one hand, a high-load drag chain is provided, comprising a plurality of chain links connected in sequence, wherein the chain links have a first end and a second end that are relatively distributed along a first direction, and the first end of one of the two connected chain links is hinged to the second end of the other, so that one of the two connected chain links can swing relative to the other, and the two connected chain links have a first state and a second state;

[0007] The first end is provided with a first supporting unit, the first supporting unit comprises a first convex portion, a first groove, a first abutting portion, a second abutting portion, a third abutting portion and a fourth abutting portion, the first abutting portion and the second abutting portion are respectively located at two sides of the first convex portion along the second direction, the third abutting portion and the fourth abutting portion are respectively located at two sides of the first groove along the second direction; the second direction is perpendicular to the first direction;

[0008] The second end is provided with a second supporting unit, the second supporting unit comprising a second groove arranged corresponding to the first convex portion, a second convex portion arranged corresponding to the first groove, a fifth abutting portion arranged corresponding to the first abutting portion, a sixth abutting portion arranged corresponding to the second abutting portion, a seventh abutting portion arranged corresponding to the third abutting portion, and an eighth abutting portion arranged corresponding to the fourth abutting portion;

[0009] In the first state, of the two connected chain links, the first abutting portion of one of them can abut against the fifth abutting portion of the other, and the first convex portion of one of them can abut against the side wall of the second groove of the other on the side away from the first abutting portion, and the third abutting portion of one of them can abut against the seventh abutting portion of the other, and the second convex portion of one of them can abut against the side wall of the first groove of the other on the side away from the third abutting portion;

[0010] In the second state, among the two connected chain links, the second abutment portion of one of them can abut against the sixth abutment portion of the other, and the first protrusion of one of them can abut against the side wall of the second groove of the other on the side away from the second abutment portion, and the fourth abutment portion of one of them can abut against the eighth abutment portion of the other, and the second protrusion of one of them can abut against the side wall of the first groove of the other on the side away from the fourth abutment portion.

[0011] As an optional solution of the high-load drag chain, the first abutting portion and the fifth abutting portion are in surface contact; and / or,

[0012] The first protrusion is in surface contact with a side wall of the second groove on a side away from the first abutting portion; and / or,

[0013] The third abutting portion is in surface contact with the seventh abutting portion; and / or,

[0014] The second protrusion is in surface contact with a side wall of the first groove on a side away from the third abutting portion; and / or,

[0015] The second abutting portion is in surface contact with the sixth abutting portion; and / or,

[0016] The first protrusion is in surface contact with a side wall of the second groove on a side away from the second abutting portion; and / or,

[0017] The fourth abutting portion is in surface contact with the eighth abutting portion; and / or,

[0018] The second protrusion is in surface contact with a side wall of the first groove on a side away from the fourth abutting portion.

[0019] As an optional solution for the high-load drag chain, the chain link includes two side plates and a connecting plate connected between the two side plates, and the two side plates are symmetrically arranged relative to the connecting plate;

[0020] The first supporting unit and the second supporting unit are respectively disposed at two ends of the side plate.

[0021] As an optional solution of the high-load drag chain, along the third direction, the second groove is located on the outer side of the second convex portion, and the second groove has an outer opening facing the third direction; the third direction is perpendicular to the first direction and the second direction in pairs;

[0022] The side plate is provided with an outer baffle plate on the outer side along the third direction, and the outer baffle plate of one of the two connected chain links can close the outer opening of the second groove of the other chain link.

[0023] As an optional solution for the high-load drag chain, the outer baffle is provided with a first arc-shaped convex portion at one end along the first direction, and a first arc-shaped groove adapted to the first arc-shaped convex portion at the other end;

[0024] The first arc-shaped protrusion of one of the two connected chain links can extend into the first arc-shaped groove of the other one.

[0025] As an optional solution of the high-load drag chain, along the third direction, the first groove is located on the inner side of the first convex part, and the first groove has an inner opening along the third direction; the third direction is perpendicular to the first direction and the second direction in pairs;

[0026] An inner baffle is provided on the inner side of the side plate along the third direction, and the inner baffle of one of the two connected chain links can close the inner opening of the first groove of the other chain link.

[0027] As an optional solution for the high-load drag chain, the inner baffle is provided with a second arc-shaped convex portion at one end along the first direction, and a second arc-shaped groove adapted to the second arc-shaped convex portion at the other end;

[0028] The second arc-shaped protrusion of one of the two connected chain links can extend into the second arc-shaped groove of the other one.

[0029] As an optional solution for the high-load drag chain, the connecting plates are provided on both sides of the side plate along the second direction.

[0030] As an optional solution for the high-load drag chain, along the first direction, the length of the connecting plate is smaller than the length of the side plate.

[0031] As an optional solution for the high-load drag chain, the chain link further comprises a plurality of packaging plates arranged side by side with the connecting plate along the first direction, and the packaging plates are detachably connected to the side plates.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The high-load drag chain of the present invention has two connected chain links in a first state, wherein the first abutting portion of one of them abuts against the fifth abutting portion of the other, and the first convex portion of one of them abuts against the side wall on the side where the second groove of the other is away from the first abutting portion, and the third abutting portion of one of them abuts against the seventh abutting portion of the other, and the second convex portion of one of them abuts against the side wall on the side where the first groove of the other is away from the third abutting portion, thereby having four force points; in a second state, wherein the second abutting portion of one of them abuts against the sixth abutting portion of the other, and the first convex portion of one of them abuts against the side wall on the side where the second groove of the other is away from the second abutting portion, and the fourth abutting portion of one of them abuts against the eighth abutting portion of the other, and the second convex portion of one of them abuts against the side wall on the side where the first groove of the other is away from the fourth abutting portion, thereby also having four force points. Compared with the prior art, the number of force points is increased, and the purpose of improving the load capacity of the drag chain can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of a towline in the prior art;

[0035] Figure 2 This is a schematic diagram of the structure of a high-load drag chain in an embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the structure of two connected links in the first state according to an embodiment of the present invention Figure 1 ;

[0037] Figure 4 Schematic diagram of the structure of two connected links in the first state according to an embodiment of the present invention Figure 2 ;

[0038] Figure 5 for Figure 4 The cross-sectional view of the AA surface;

[0039] Figure 6 for Figure 4 A cross-sectional view of the BB surface;

[0040] Figure 7 Schematic diagram of the structure of two connected links in the second state according to an embodiment of the present invention Figure 1 ;

[0041] Figure 8Schematic diagram of the structure of two connected links in the second state according to an embodiment of the present invention Figure 2 ;

[0042] Fig. 9 for Figure 8 The cross-sectional view of the CC surface;

[0043] Fig.10 for Figure 8 The cross-sectional view of the DD surface;

[0044] Fig.11 The structure of the first chain link (without inner baffle) in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0045] Fig.12 The structure of the first chain link (without inner baffle) in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0046] Fig.13 The structure of the second type of chain link (with an inner baffle) in the embodiment of the present invention is schematically shown. Figure 1 ;

[0047] Fig.14 The structure of the second link (with an inner baffle) in the embodiment of the present invention is shown in FIG. Figure 2 .

[0048] Reference numerals:

[0049] 100, chain link; 101, contact portion 1; 102, contact portion 2; 103, contact portion 3; 104, contact portion 4;

[0050] 1. Chain links;

[0051] 11, first end; 111, hinge hole; 112, first support unit; 1121, first convex portion; 1122, first groove; 11221, inner opening; 1123, first abutting portion; 1124, second abutting portion; 1125, third abutting portion; 1126, fourth abutting portion;

[0052] 12, second end; 121, hinge axis; 122, second support unit; 1221, second groove; 12211, external opening; 1222, second convex portion; 1223, fifth abutting portion; 1224, sixth abutting portion; 1225, seventh abutting portion; 1226, eighth abutting portion;

[0053] 1a, side plate; 1b, connecting plate; 1c, outer baffle; 1c1, first arc-shaped protrusion; 1c2, first arc-shaped groove; 1d, inner baffle; 1d1, second arc-shaped protrusion; 1d2, second arc-shaped groove. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0057] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They 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", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0058] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0061] like Figure 2-14 As shown, the present embodiment provides a high-load drag chain, comprising a plurality of chain links 1 connected in sequence, wherein the chain links 1 have a first end 11 and a second end 12 relatively distributed along a first direction, the first end 11 of one of the two connected chain links 1 is hinged to the second end 12 of the other, specifically, the first end 11 is provided with a hinge structure such as a hinge hole 111, and the second end 12 is provided with a hinge matching structure such as a hinge shaft 121, the hinge structure of one of the two connected chain links 1 is hinged to the hinge matching structure of the other such as the hinge shaft 121 is rotatably penetrated in the hinge hole 111, so that one of the two connected chain links 1 can swing relative to the other, and the two connected chain links 1 have a first state and a second state, and the two connected chain links 1 can switch between the first state and the second state.

[0062] The first end 11 is provided with a first supporting unit 112, and the first supporting unit 112 includes a first convex portion 1121, a first groove 1122, a first abutting portion 1123, a second abutting portion 1124, a third abutting portion 1125 and a fourth abutting portion 1126, the first abutting portion 1123 and the second abutting portion 1124 are respectively located on both sides of the first convex portion 1121 along the second direction, the third abutting portion 1125 and the fourth abutting portion 1126 are respectively located on both sides of the first groove 1122 along the second direction; the second direction is perpendicular to the first direction.

[0063] The second end 12 is provided with a second supporting unit 122, and the second supporting unit 122 includes a second groove 1221 arranged corresponding to the first convex portion 1121, a second convex portion 1222 arranged corresponding to the first groove 1122, a fifth abutting portion 1223 arranged corresponding to the first abutting portion 1123, a sixth abutting portion 1224 arranged corresponding to the second abutting portion 1124, a seventh abutting portion 1225 arranged corresponding to the third abutting portion 1125 and an eighth abutting portion 1226 arranged corresponding to the fourth abutting portion 1126.

[0064] In the first state, of the two connected links 1, the first abutting portion 1123 of one can abut against the fifth abutting portion 1223 of the other, and the first convex portion 1121 of one can abut against the side wall of the second groove 1221 of the other away from the first abutting portion 1123, and the third abutting portion 1125 of one can abut against the seventh abutting portion 1225 of the other, and the second convex portion 1222 of one can abut against the side wall of the first groove 1122 of the other away from the third abutting portion 1125. In this way, the two connected links 1 can have four force points in the first state, which increases the number of force points compared to the prior art, thereby improving the load capacity of the drag chain.

[0065] In the second state, of the two connected links 1, the second abutting portion 1124 of one can abut against the sixth abutting portion 1224 of the other, and the first convex portion 1121 of one can abut against the side wall of the second groove 1221 of the other on the side away from the second abutting portion 1124, and the fourth abutting portion 1126 of one can abut against the eighth abutting portion 1226 of the other, and the second convex portion 1222 of one can abut against the side wall of the first groove 1122 of the other on the side away from the fourth abutting portion 1126. In this way, the two connected links 1 can have four force points in the second state, which increases the number of force points compared to the prior art, thereby improving the load capacity of the drag chain.

[0066] Optionally, the first abutting portion 1123 is in surface contact with the fifth abutting portion 1223. Further, the first convex portion 1121 is in surface contact with the side wall of the second groove 1221 away from the first abutting portion 1123. Further, the third abutting portion 1125 is in surface contact with the seventh abutting portion 1225. Further, the second convex portion 1222 is in surface contact with the side wall of the first groove 1122 away from the third abutting portion 1125. Further, the second abutting portion 1124 is in surface contact with the sixth abutting portion 1224. Further, the first convex portion 1121 is in surface contact with the side wall of the second groove 1221 away from the second abutting portion 1124. Further, the fourth abutting portion 1126 is in surface contact with the eighth abutting portion 1226. Further, the second convex portion 1222 is in surface contact with the side wall of the first groove 1122 away from the fourth abutting portion 1126. The stress points adopt the form of surface contact, which can further improve the stress strength and has the effect of further improving the load capacity of the drag chain.

[0067] Optionally, the chain link 1 includes two side plates 1a and a connecting plate 1b connected between the two side plates 1a, and the two side plates 1a are symmetrically arranged relative to the connecting plate 1b; the two ends of the side plates 1a are respectively provided with a first supporting unit 112 and a second supporting unit 122. In other words, one end of each side plate 1a is provided with a first supporting unit 112, and the other end is provided with a second supporting unit 122, so that when the two connected chain links 1 swing, the force is more uniform, and the movement is smoother and more stable.

[0068] It should be noted that, in the same link 1, along the third direction, for one of the side plates 1a and the structure on the side plate 1a, the side close to the other side plate 1a is the inner side, and the side away from the other side plate 1a is the outer side; the third direction is perpendicular to the first direction and the second direction.

[0069] Optionally, along the third direction, the second groove 1221 is located outside the second convex portion 1222, and the second groove 1221 has an external opening 12211 facing the third direction. Specifically, in this embodiment, the second groove 1221 is a U-shaped groove provided on the outside of the side plate 1a, and the U-shaped groove has the external opening 12211 in addition to the U-shaped opening facing the first direction, and the first convex portion 1121 of one of the two connected chain links 1 extends into the U-shaped groove from the U-shaped opening of the U-shaped groove. Furthermore, the two end surfaces of the U-shaped opening end of the U-shaped groove are the fifth abutting portion 1223 and the sixth abutting portion 1224.

[0070] Furthermore, an outer baffle plate 1c is provided on the outer side of the side plate 1a along the third direction. The outer baffle plate 1c of one of the two connected chain links 1 can close the outer opening 12211 of the other second groove 1221, thereby preventing dust and other debris from entering the second groove 1221 from the outer opening 12211 and affecting the cooperation between the first protrusion 1121 and the second groove 1221.

[0071] Optionally, the outer baffle plate 1c is provided with a first arc-shaped protrusion 1c1 at one end along the first direction, and a first arc-shaped groove 1c2 adapted to the first arc-shaped protrusion 1c1 at the other end; the arc-shaped first protrusion 1c1c1 of one of the two connected links 1 can extend into the first arc-shaped groove 1c2 of the other. Preferably, along the first direction, there is only a small gap between the first arc-shaped protrusion 1c1 of one of the two connected links 1 and the first arc-shaped groove 1c2 of the other, so as to ensure that the two connected links 1 can swing smoothly relative to each other, and improve the sealing effect of the outer baffle plate 1c on the second groove 1221, thereby improving the aesthetics of the high-load drag chain.

[0072] Optionally, along the third direction, the first groove 1122 is located inside the first convex portion 1121, and the first groove 1122 has an inner opening 11221 along the third direction. Specifically, in this embodiment, the first groove 1122 is a U-shaped groove provided inside the side plate 1a, and the U-shaped groove has not only a U-shaped opening facing the first direction, but also the inner opening 11221, and the second convex portion 1222 of one of the two connected links 1 extends into the U-shaped groove from the U-shaped opening of the U-shaped groove. Furthermore, the two end surfaces of the U-shaped opening end of the U-shaped groove are the third abutting portion 1125 and the fourth abutting portion 1126.

[0073] Furthermore, an inner baffle plate 1d is provided on the inner side of the side plate 1a along the third direction. The inner baffle plate 1d of one of the two connected chain links 1 can close the inner opening 11221 of the other first groove 1122, thereby preventing dust and other debris from entering the first groove 1122 from the inner opening 11221 and affecting the cooperation between the second protrusion 1222 and the first groove 1122.

[0074] It should be noted that, in this embodiment, in order to avoid excessive increase in the thickness of the side panel 1a, the thickness of the second protrusion 1222 along the third direction can be reduced to compensate for the thickness of the inner baffle plate 1d along the third direction. In other words, compared with the drag chain without the inner baffle plate 1d, the second protrusion 1222 of the drag chain with the inner baffle plate 1d has a smaller thickness along the third direction and weaker strength, but it can still ensure that the load capacity of the drag chain meets user needs.

[0075] Optionally, the inner baffle plate 1d is provided with a second arc-shaped protrusion 1d1 at one end along the first direction, and a second arc-shaped groove 1d2 adapted to the second arc-shaped protrusion 1d1 at the other end; the second arc-shaped protrusion 1d1 of one of the two connected links 1 can extend into the second arc-shaped groove 1d2 of the other. Preferably, along the first direction, there is only a small gap between the second arc-shaped protrusion 1d1 of one of the two connected links 1 and the second arc-shaped groove 1d2 of the other, so as to ensure that the two connected links 1 can swing relatively smoothly and improve the sealing effect of the inner baffle plate 1d on the first groove 1122.

[0076] In this embodiment, in the same chain link 1, the first arc-shaped convex portion 1c1 and the first convex portion 1121 are both located at the first end 11 of the chain link 1, and at the first end 11, the first arc-shaped convex portion 1c1 is flush with the first convex portion 1121, so as to avoid interference with the relative rotation of the two connected chain links 1, and to be more aesthetically pleasing. Further, in the same chain link 1, the second arc-shaped convex portion 1d1 and the second convex portion 1222 are both located at the second end 12 of the chain link 1, and at the second end 12, the second arc-shaped convex portion 1d1 is flush with the second convex portion 1222, so as to avoid interference with the relative rotation of the two connected chain links 1, and to be more aesthetically pleasing.

[0077] Optionally, connecting plates 1b are provided on both sides of the side plate 1a along the second direction, which can increase the strength and stability of the link 1 on the one hand, and on the other hand, the connecting plates 1b on both sides of the side plate 1a can limit and support structures such as cables or pipelines placed in the drag chain.

[0078] Optionally, along the first direction, the length of the connecting plate 1b is less than the length of the side plate 1a, so that a gap can be formed between the connecting plates 1b of two connected links 1, which is beneficial for heat dissipation of cables or pipes in the drag chain and meets the needs of different users.

[0079] Optionally, the link 1 also includes a plurality of packaging plates arranged side by side with the connecting plate 1b along the first direction, and the packaging plates are detachably connected to the side plates 1a, so that the sealing of the link 1 can be improved by the packaging plates, thereby further preventing dust and other debris from entering the interior of the drag chain, thereby improving the protection of the drag chain on structures such as cables or pipelines.

[0080] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A high-load drag chain, comprising a plurality of chain links (1) connected in sequence, wherein the chain links (1) have a first end (11) and a second end (12) which are relatively distributed along a first direction, wherein the first end (11) of one of the two connected chain links (1) is hinged to the second end (12) of the other, so that one of the two connected chain links (1) can swing relative to the other, and the two connected chain links (1) have a first state and a second state; It is characterized in that The chain link (1) comprises two side plates (1a) and a connecting plate (1b) connected between the two side plates (1a), and the two side plates (1a) are symmetrically arranged relative to the connecting plate (1b); The two ends of the side plate (1a) are respectively provided with a first support unit (112) and a second support unit (122); The first end (11) is provided with the first supporting unit (112), the first supporting unit (112) comprising a first convex portion (1121), a first groove (1122), a first abutting portion (1123), a second abutting portion (1124), a third abutting portion (1125) and a fourth abutting portion (1126), the first abutting portion (1123) and the second abutting portion (1124) being respectively located on both sides of the first convex portion (1121) along the second direction, the third abutting portion (1125) and the fourth abutment portion (1126) are respectively located on both sides of the first groove (1122) along the second direction; in the same chain link (1), along the third direction, for one of the side plates (1a), the side close to the other side plate (1a) is the inner side, and the side away from the other side plate (1a) is the outer side; along the third direction, the first groove (1122) is located on the inner side of the first convex portion (1121), and the second direction is perpendicular to the first direction and the third direction in pairs; The second end (12) is provided with a second supporting unit (122), the second supporting unit (122) comprising a second groove (1221) arranged corresponding to the first convex portion (1121), a second convex portion (1222) arranged corresponding to the first groove (1122), a fifth abutting portion (1223) arranged corresponding to the first abutting portion (1123), a sixth abutting portion (1224) arranged corresponding to the second abutting portion (1124), a seventh abutting portion (1225) arranged corresponding to the third abutting portion (1125), and an eighth abutting portion (1226) arranged corresponding to the fourth abutting portion (1126); In the first state, of the two connected chain links (1), the first abutting portion (1123) of one of them can abut against the fifth abutting portion (1223) of the other, and the first convex portion (1121) of one of them can abut against the side wall of the second groove (1221) of the other on the side away from the first abutting portion (1123), and the third abutting portion (1125) of one of them can abut against the seventh abutting portion (1225) of the other, and the second convex portion (1222) of one of them can abut against the side wall of the first groove (1122) of the other on the side away from the third abutting portion (1125); In the second state, of the two connected chain links (1), the second abutment portion (1124) of one of them can abut against the sixth abutment portion (1224) of the other, and the first convex portion (1121) of one of them can abut against the side wall of the second groove (1221) of the other on the side away from the second abutment portion (1124), and the fourth abutment portion (1126) of one of them can abut against the eighth abutment portion (1226) of the other, and the second convex portion (1222) of one of them can abut against the side wall of the first groove (1122) of the other on the side away from the fourth abutment portion (1126).

2. The high load drag chain according to claim 1, It is characterized in that The first abutting portion (1123) and the fifth abutting portion (1223) are in surface contact; and / or, The first convex portion (1121) is in surface contact with a side wall of the second groove (1221) on a side away from the first abutting portion (1123); and / or, The third abutting portion (1125) is in surface contact with the seventh abutting portion (1225); and / or, The second convex portion (1222) is in surface contact with a side wall of the first groove (1122) on a side away from the third abutting portion (1125); and / or, The second abutting portion (1124) is in surface contact with the sixth abutting portion (1224); and / or, The first convex portion (1121) is in surface contact with a side wall of the second groove (1221) on a side away from the second abutting portion (1124); and / or, The fourth abutting portion (1126) is in surface contact with the eighth abutting portion (1226); and / or, The second convex portion (1222) is in surface contact with a side wall of the first groove (1122) on a side away from the fourth abutting portion (1126).

3. The high load drag chain according to claim 1, It is characterized in that Along the third direction, the second groove (1221) is located on the outside of the second convex portion (1222), and the second groove (1221) has an outer opening (12211) facing the third direction; the side plate (1a) is provided with an outer baffle plate (1c) on the outside along the third direction, and the outer baffle plate (1c) of one of the two connected chain links (1) can close the outer opening (12211) of the second groove (1221) of the other one.

4. The high load drag chain according to claim 3, It is characterized in that The outer baffle (1c) is provided with a first arc-shaped convex portion (1c1) at one end along the first direction, and a first arc-shaped groove (1c2) adapted to the first arc-shaped convex portion (1c1) at the other end; The first arc-shaped protrusion (1c1) of one of the two connected chain links (1) can extend into the first arc-shaped groove (1c2) of the other one.

5. The high load drag chain according to claim 1, It is characterized in that The first groove (1122) has an inner opening (11221) along the third direction; the side plate (1a) is provided with an inner baffle plate (1d) on the inner side along the third direction, and the inner baffle plate (1d) of one of the two connected chain links (1) can close the inner opening (11221) of the other first groove (1122).

6. The high load drag chain according to claim 5, It is characterized in that The inner baffle (1d) is provided with a second arc-shaped convex portion (1d1) at one end along the first direction, and a second arc-shaped groove (1d2) adapted to the second arc-shaped convex portion (1d1) at the other end; The second arc-shaped protrusion (1d1) of one of the two connected chain links (1) can extend into the second arc-shaped groove (1d2) of the other one.

7. The high load drag chain according to claim 1, It is characterized in that The connecting plates (1b) are provided on both sides of the side plate (1a) along the second direction.

8. The high load drag chain according to claim 1 or 7, It is characterized in that Along the first direction, the length of the connecting plate (1b) is smaller than the length of the side plate (1a).

9. The high load drag chain according to claim 8, It is characterized in that The chain link (1) further comprises a plurality of packaging plates arranged side by side with the connecting plate (1b) along the first direction, and the packaging plates are detachably connected to the side plates (1a).

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