A closed - type anti - disconnection and noise - reducing micro - towline

Abstract

The present invention provides a closed anti-disconnection and noise-reducing micro cable carrier. A limiting structure is provided between two adjacent chain links. The limiting structure includes a limiting groove provided on one of the chain links, and a limiting block provided on the adjacent other chain link and adapted to be connected with the limiting groove. The limiting block has a first surface opposite to the bottom wall of the limiting groove. By providing a damping member on one of the first surface and the limiting groove, the damping member is adapted to slide and friction with the mating surface opposite thereto when the limiting block rotates, and the damping member has elasticity. In this way, before the limiting block rotates to contact the side wall of the limiting groove, its contact speed and collision force with the side wall of the limiting groove will be reduced due to the action of the frictional force and the elastic damping force. Compared with the prior art, this has a better noise reduction effect.

Description

Technical Field

[0001] The present invention relates to the technical field of drag chains, and particularly relates to a closed anti-disconnection and noise-reducing micro drag chain. Background Art

[0002] Drag chains are suitable for use in reciprocating motion occasions, and are a kind of functional drag chains that can play a role in towing and protecting the built-in cables, oil pipes, gas pipes, water pipes, etc.

[0003] The drag chain is formed by splicing a plurality of chain links 01. The adjacent two chain links 01 are rotationally connected through a hole-shaft fit, and a limiting structure for limiting the rotation angle between the two is provided between the adjacent two chain links 01. The limiting structure includes a limiting groove 02 provided on one side of the chain link 01, and a limiting block 03 provided inside the chain link 01 and capable of being adaptively connected to the limiting groove 02 on the adjacent chain link 01. At present, when the drag chain runs at high speed, the limiting block 03 continuously and quickly collides with the side wall of the limiting groove 02, thereby generating a large amount of noise.

[0004] To solve the above problems, as Figure 11 shown, the common method is to provide elastic strips 04 on the two side walls of the limiting groove 02. When the elastic strips 04 collide with the limiting block, they can play a certain buffering role, thereby reducing noise. However, the defect of the above solution is that the limiting block only contacts the elastic strip when it is close to the side wall of the limiting groove. Since the moving speed of the limiting block is very fast and the impact force is large, the noise reduction effect of the above structure is average. In addition, the existing micro drag chains on the market have not been able to achieve a fully enclosed structure on both the inner and outer sides, which easily leads to foreign objects entering the chain link, thereby causing damage to the built-in wire pipes. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor noise reduction effect in the prior art, so as to provide a closed anti-disconnection and noise-reducing micro drag chain with good noise reduction effect.

[0006] For this purpose, the present invention provides a closed anti-disconnection and noise-reducing micro drag chain, which is formed by splicing a plurality of chain links. A limiting structure for controlling the rotation angle between the adjacent two chain links is provided between the adjacent two chain links. The limiting structure includes a limiting groove provided on one of the chain links, and a limiting block provided on the adjacent other chain link and capable of being adaptively connected to the limiting groove. The limiting groove has a bottom wall and side walls respectively arranged on both sides of the bottom wall. The limiting block has a first surface opposite to the bottom wall and a second surface opposite to the side wall. The limiting structure further includes a damping member provided on one of the first surface and the limiting groove. The damping member is adapted to slide and friction with the mating surface opposite to it when the limiting block rotates.

[0007] The damping member is integrally formed on the bottom wall of the limiting groove or the first surface.

[0008] The damping member has elastic arms, and two ends of the elastic arms extend towards the corresponding side walls.

[0009] A connecting portion connected to the bottom wall of the limiting groove or the first surface is provided in the middle of the elastic arm. The elastic arm has a first contact surface and a second contact surface respectively disposed on two sides of the connecting portion. When the limiting block rotates, only the first contact surface and the second contact surface of the elastic arm contact the mating surface.

[0010] The damping member is a rubber member provided on the bottom wall of the limiting groove or the first surface.

[0011] The link includes two link bodies arranged in parallel, and a first baffle and a second baffle which are vertically distributed and adapted to connect the two link bodies. A support structure for mutual support is provided between adjacent two links when the drag chain is horizontally arranged.

[0012] The support structure includes a first card slot and a card block respectively disposed at two ends in the length direction of the second baffle. When the drag chain is horizontally arranged, the card block of the second baffle of one link is adapted to be inserted into the first card slot of the second baffle of an adjacent other link.

[0013] The support structure further includes the limiting groove and the limiting block. When the drag chain is horizontally arranged, the limiting block of one link abuts against a side wall of the limiting groove of an adjacent other link.

[0014] The link body includes a first link plate and a second link plate arranged left and right. A slot for inserting the second link plate of an adjacent other link is provided between the first link plate of one link and the second baffle.

[0015] The second baffle includes a second baffle body, and a first baffle portion and a second baffle portion respectively disposed on two sides of the second baffle body and extending towards the second baffle body of an adjacent link. The second baffle portion extends to the inner side surface of the first baffle portion. The second baffle portion of one link and the first baffle portion of another link enclose a closed space.

[0016] The first baffle includes a first baffle body, and a first extension portion and a second extension portion respectively disposed on two sides of the first baffle body and extending towards the first baffle body of an adjacent link. The second extension portion extends to the inner side surface of the first extension portion. The second extension portion of one link and the first extension portion of another link enclose a closed space.

[0017] The first baffle is detachably mounted on the link body through a clamping structure. The clamping structure includes a connecting shaft and a clamping seat. The connecting shaft is arranged at the top of the link body; the clamping seats are arranged on both sides of the first baffle, and have a second clamping groove adapted to be clamped with the connecting shaft, and a first clamping block and a second clamping block respectively arranged on both sides of the second clamping groove.

[0018] A damping structure adapted to keep the first baffle positioned in an open state is arranged between the first baffle and the link body. The damping structure includes a first clamping block arranged on the outer side surface of the second clamping groove, and a mating surface arranged on the link body and adapted to be clamped with the first clamping block.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. For the enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, a limiting structure is arranged between two adjacent link bodies. The limiting structure includes a limiting groove arranged on one of the link bodies, and a limiting block arranged on the adjacent other link body and adapted to be connected with the limiting groove. The limiting block has a first surface oppositely arranged with the bottom wall of the limiting groove. By arranging a damping member on one of the first surface and the limiting groove, the damping member is adapted to slide and friction with the mating surface oppositely arranged when the limiting block rotates, that is, before the limiting block rotates to contact the side wall of the limiting groove, its contact speed and collision force with the side wall of the limiting groove will be reduced due to the damping effect of the friction force. Compared with the prior art, the noise reduction effect is better.

[0021] 2. For the enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, since the damping member is integrally formed on the bottom wall of the limiting groove or the first surface, the structure is simpler, the processing is convenient, and the production cost is reduced.

[0022] 3. For the enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, the damping member has an elastic arm. The two ends of the elastic arm extend towards the corresponding side wall direction, and the elastic arm will be elastically deformed under pressure, that is, during the movement of the limiting block, it will not only be affected by the sliding friction force, but also be affected by the elastic damping force, so as to further reduce the contact speed before the limiting block collides with the side wall of the limiting groove, and the noise reduction effect is better.

[0023] 4. The enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, a connecting portion connected to the bottom wall of the limiting groove or the first surface is provided in the middle of the elastic arm. The elastic arm has a first contact surface and a second contact surface respectively disposed on both sides of the connecting portion. When the limiting block rotates, only the first contact surface and the second contact surface of the elastic arm contact the mating surface. Since the connecting portion has relatively small elasticity or almost no elasticity, when the limiting block rotates to a position opposite to the connecting portion, there is a small gap between the limiting block and the elastic arm, which can avoid "hard contact" between the limiting block and the contact surface on one side of the damping member connecting portion and prevent jamming caused by a large damping force. When the mating surface rotates upward or downward, the contact friction between the mating surface and the first contact surface or the second contact surface gradually increases, so as to better slow down the contact speed and force of the limiting block.

[0024] 5. The enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, the support structure includes a first card slot and a clamping block respectively disposed at both ends of the second baffle in the length direction. When the cable carrier is kept horizontally arranged, the clamping block of the second baffle of one link is adapted to be inserted into the first card slot of the second baffle of an adjacent other link. When the cable carrier is kept horizontally arranged, the support structure can keep a certain supporting effect on two adjacent links, achieving the effect of preventing the cable carrier from sagging in the middle, thereby enhancing the overall running stability of the cable carrier, as well as improving the overhead performance and load-carrying performance.

[0025] 6. The enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, the support structure further includes a limiting groove and a limiting block. When the cable carrier is kept horizontally arranged, the limiting block of one link abuts against one side wall of the limiting groove of an adjacent other link, which can further keep a certain supporting effect on two adjacent links and improve the overhead performance and load-carrying performance.

[0026] 7. The enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, the link body includes a first link plate and a second link plate arranged left and right. A slot for inserting the second link plate of an adjacent other link is provided between the first link plate of one link and the second baffle. During assembly, after the second link plate is inserted into the slot, the second link plate will be clamped and fixed by the first link plate and the second baffle, which can prevent two adjacent links from being disconnected and separated, thereby increasing the overhead performance and load-carrying performance of the cable carrier.

[0027] 8. The enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, the second baffle includes a second baffle body, and a first baffle portion and a second baffle portion respectively disposed on both sides of the second baffle body and extending towards the second baffle body of the adjacent link. The second baffle portion extends to the inner side surface of the first baffle portion. The second baffle portion of one link and the first baffle portion of another link enclose a closed space. Such a setting can achieve full enclosure between the second baffles of two adjacent links, prevent foreign objects outside from entering the link, and thus avoid damage to the built-in wire tube.

[0028] 9. The enclosed anti-disconnection and noise-reducing micro-cable carrier provided by the present invention, the first baffle includes a first baffle body, and a first extension part and a second extension part which are respectively arranged on both sides of the first baffle body and extend towards the first baffle body of the adjacent link. The second extension part extends to the inner side surface of the first extension part. The second extension part of one link and the first extension part of another link enclose a closed space. Such a setting can achieve full closure between the first baffles of two adjacent links, prevent foreign objects on the outside from entering the link, and thus avoid damage to the built-in wire tube.

[0029] 10. The enclosed anti-disconnection and noise-reducing micro-cable carrier provided by the present invention, a damping structure is provided between the first baffle and the link body and is adapted to keep the first baffle positioned in an open state. The damping structure includes a first block arranged on the outer side surface of the second card slot, and a mating surface arranged on the link body and capable of being adaptively clamped with the first block. The damping structure can position the first baffle after it is opened to the open position and will not slide, which is convenient for the assembler to load the wire tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a perspective view of the enclosed anti-disconnection and noise-reducing micro-cable carrier of the present invention;

[0032] Figure 2 is Figure 1 a sectional view of

[0033] Figure 3 is Figure 2 an enlarged schematic view of the structure of part A in

[0034] Figure 4 is Figure 2 an enlarged schematic view of the structure of part B in

[0035] Figure 5 is Figure 2 an enlarged schematic view of the structure of part C in

[0036] Figure 6 is Figure 2 an enlarged schematic view of the structure of part D in

[0037] Figure 7 is Figure 1 a perspective view of two adjacent links with the first baffle opened in

[0038] Figure 8 is Figure 7 explosion structure schematic diagram of

[0039] Figure 9 is Figure 7 isometric view from another perspective;

[0040] Figure 10 is Figure 7 cross-sectional view of

[0041] Figure 11 is the structure schematic diagram of the limit structure in the prior art.

[0042] Explanation of reference numerals: 01, link; 02, limit groove; 03, limit block; 04, elastic strip;

[0043] 1, link; 11, link body; 12, first link plate; 13, second link plate; 14, slot; 15, connecting shaft; 16, rotating shaft; 17, jack; 2, limit groove; 21, bottom wall; 22, side wall; 3, limit block; 31, first surface; 32, second surface; 4, damping member; 41, elastic arm; 42, connecting portion; 43, first contact surface; 44, second contact surface; 5, first baffle; 51, first baffle body; 52, first extension; 53, second extension; 54, second card slot; 55, first card block; 56, second card block; 6, second baffle; 61, first card slot; 62, card block; 63, second baffle body; 64, first baffle portion; 65, second baffle portion. Detailed implementation manners

[0044] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Embodiment

[0049] This embodiment provides a closed anti-disconnection and noise-reducing micro cable carrier, as Figure 1 and 2 shown, which is formed by splicing a plurality of link sections 1. The link section 1 includes two link section bodies 11, a first baffle 5, and a second baffle 6.

[0050] The link section body 11, as Figure 7 shown, includes a first link plate 12 formed on the right side and a second link plate 13 formed on the left side. A connecting shaft 15 is provided at the top of the link section body 11.

[0051] The second link plate 13 has a rotating shaft 16 formed therein and a limiting groove 2 provided at its edge, as Figure 2 , 3 , 4, 5, shown. The limiting groove 2 has a bottom wall 21 and side walls 22 respectively provided on both sides of the bottom wall 21. A damping member 4 adapted to slide and rub against the limiting block 3 is formed on the bottom wall 21. The damping member 4 has an elastic arm 41. Both ends of the elastic arm 41 extend towards the corresponding side walls 22. A connecting portion 42 connected to the bottom wall 21 of the limiting groove 2 is provided in the middle of the elastic arm 41. That is, the damping member 4 and the bottom wall 21 are in an H shape. The elastic arm 41 has a first contact surface 43 and a second contact surface 44 respectively provided on both sides of the connecting portion 42. When the limiting block 3 rotates, only the first contact surface 43 and the second contact surface 44 of the elastic arm 41 contact the first surface 31.

[0052] The first link plate 12 has a jack 17 formed in the middle thereof and a limiting block 3 provided on its inner side surface, as Figure 2 , 3As shown in Figures 4 and 5, when two adjacent link members 1 are assembled, the rotating shaft 16 of one link member 1 is adapted to be inserted into the insertion hole 17 of the other link member 1, and the limiting block 3 of one link member 1 is adapted to be inserted into the limiting groove 2 of the other link member 1. The limiting block 3 has a first surface 31 disposed opposite to the bottom wall 21 and a second surface 32 disposed opposite to the side wall 22.

[0053] As a transformable embodiment, the damping member 4 is integrally formed on the first surface 31 of the limiting block 3, and the damping member 4 can abut against the bottom wall 21 of the corresponding limiting groove 2.

[0054] As a transformable embodiment, the damping member 4 is a rubber member disposed on the bottom wall 21 of the limiting groove 2 or the first surface 31.

[0055] The second baffle 6, as Figure 2 、 6 As shown in Figures 8 and 9, includes a second baffle main body 63, and a first baffle portion 64 and a second baffle portion 65 respectively disposed on both sides of the second baffle main body 63 and extending towards the second baffle main body 63 of the adjacent link member 1. When two adjacent link members 1 are assembled, the second baffle portion 65 extends to the inner side surface of the first baffle portion 64, and the second baffle portion 65 of one link member 1 and the first baffle portion 64 of the other link member 1 enclose a closed space. In this embodiment, a clamping block 62 is provided at the edge of the first baffle portion 64, and a first clamping groove 61 is provided between the second baffle portion 65 and the second baffle main body 63. When the drag chain is kept horizontally arranged, the clamping block 62 of the second baffle 6 of one link member 1 is adapted to be inserted into the first clamping groove 61 of the second baffle 6 of the adjacent other link member 1. Slots 14 are provided between both sides of the first baffle portion 64 and the corresponding first link plate 12. When two adjacent link members 1 are assembled, the second link plate 13 of one link member 1 is adapted to be inserted into the slot 14 of the adjacent other link member 1, and thus is clamped and fixed.

[0056] The first stopper 5, as Figure 2 、 6As shown in Figures 7 and 10, it includes a first baffle body 51, and a first extension part 52 and a second extension part 53 respectively arranged on both sides in the width direction of the first baffle body 51 and extending towards the first baffle body 51 of the adjacent link 1. The second extension part 53 extends to the inner side surface of the first extension part 52. The second extension part 53 of one link 1 and the first extension part 52 of another link 1 enclose a closed space. Card seats are arranged on both sides in the length direction of the first baffle 5. The card seat has a second card slot 54 adapted to be clamped with the connecting shaft 15, and a first clamping block 55 and a second clamping block 56 respectively arranged on both sides of the second card slot 54. A damping structure is arranged between the first baffle 5 and the link body 11 and is adapted to keep the first baffle 5 positioned and held in an open state. The damping structure includes a first clamping block 55 arranged on the outer side surface of the second card slot 54, and a mating surface arranged on the link body 11 and adapted to be clamped with the first clamping block 55.

[0057] For the enclosed anti-disconnection and noise-reducing micro cable carrier provided by the present invention, a limiting structure is arranged between two adjacent links 1. The limiting structure includes a limiting groove 2 arranged on one of the links 1, and a limiting block 3 arranged on the adjacent other link 1 and adapted to be connected with the limiting groove 2. The limiting block 3 has a first surface 31 opposite to the bottom wall 21 of the limiting groove 2. By arranging a damping member 4 on one of the first surface 31 and the limiting groove 2, the damping member 4 is adapted to slide and rub with the mating surface arranged opposite thereto when the limiting block 3 rotates, that is, before the limiting block 3 rotates to contact the side wall 22 of the limiting groove 2, its contact speed and collision force with the side wall 22 of the limiting groove 2 will be reduced due to the damping effect of the friction force. Compared with the prior art, this has a better noise reduction effect.

[0058] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill 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 manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A closed - type anti - disconnection and noise - reducing micro - tow chain is formed by splicing a plurality of chain links (1). A limiting structure for controlling the rotation angle between two adjacent chain links (1) is provided. The limiting structure includes a limiting groove (2) provided on one of the chain links (1), and a limiting block (3) provided on the adjacent other chain link (1) and capable of being adaptively connected to the limiting groove (2). The limiting groove (2) has a bottom wall (21) and side walls (22) respectively provided on both sides of the bottom wall (21). The limiting block (3) has a first surface (31) arranged opposite to the bottom wall (21) and a second surface (32) arranged opposite to the side walls (22), and is characterized in that, Further included is a damping member (4) provided on one of the first surface (31) and the limiting groove (2), and the damping member (4) is adapted to slide and friction with a mating surface disposed opposite thereto when the limiting block (3) rotates; the damping member (4) and the bottom wall (21) are in an H shape; The damping member (4) is integrally formed on the bottom wall (21) of the limiting groove (2) or the first surface (31); The damping member (4) has elastic arms (41), and both ends of the elastic arms (41) extend toward the corresponding side walls (22); A connecting portion (42) connected to the bottom wall (21) of the limiting groove (2) or the first surface (31) is provided in the middle of the elastic arm (41), and the elastic arm (41) has a first contact surface (43) and a second contact surface (44) respectively disposed on both sides of the connecting portion (42). When the limiting block (3) rotates, only the first contact surface (43) and the second contact surface (44) of the elastic arm (41) are in contact with the mating surface; The damping member (4) is a rubber member provided on the bottom wall (21) of the limiting groove (2) or the first surface (31).

2. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 1, characterized in that, The link (1) includes two link bodies (11) arranged in parallel, and a first baffle (5) and a second baffle (6) which are vertically distributed and adapted to connect the two link bodies (11). A support structure for mutual support is provided between adjacent two links (1) when the drag chain is horizontally arranged.

3. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 2, characterized in that, The support structure includes a first card slot (61) and a card block (62) respectively disposed at both ends in the length direction of the second baffle (6). When the drag chain is horizontally arranged, the card block (62) of the second baffle (6) of one link (1) is adapted to be inserted into the first card slot (61) of the second baffle (6) of the adjacent other link (1).

4. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 2 or 3, characterized in that, The support structure further includes the limiting groove (2) and the limiting block (3). When the drag chain is horizontally arranged, the limiting block (3) of one link (1) abuts against a side wall (22) of the limiting groove (2) of the adjacent other link (1).

5. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 2, wherein The link body (11) includes a first link plate (12) and a second link plate (13) arranged left and right. A slot (14) for the second link plate (13) of the adjacent other link (1) to be inserted is provided between the first link plate (12) of one link (1) and the second baffle (6).

6. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 2, wherein The second baffle (6) includes a second baffle body (63), and a first baffle portion (64) and a second baffle portion (65) which are respectively disposed on both sides of the second baffle body (63) and extend toward the second baffle body (63) of the adjacent link (1). The second baffle portion (65) extends to the inner side surface of the first baffle portion (64). The second baffle portion (65) of one link (1) and the first baffle portion (64) of the other link (1) enclose a closed space.

7. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 2, wherein The first baffle (5) includes a first baffle body (51), a first extension part (52) and a second extension part (53) which are respectively arranged on two sides of the first baffle body (51) and extend towards the first baffle body (51) of the adjacent link (1). The second extension part (53) extends to the inner side surface of the first extension part (52). The second extension part (53) of one link (1) and the first extension part (52) of another link (1) enclose a closed space.

8. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 2, characterized in that, The first baffle (5) is detachably mounted on the link body (11) through a clamping structure, and the clamping structure includes: A connecting shaft (15) arranged at the top of the link body (11); A clamping seat arranged on two sides of the first baffle (5), having a second clamping groove (54) adapted to be clamped with the connecting shaft (15), and a first clamping block (55) and a second clamping block (56) respectively arranged on two sides of the second clamping groove (54).

9. The enclosed anti-disconnection and noise-reducing micro-cable carrier according to claim 8, characterized in that, A damping structure adapted to keep the first baffle (5) positioned in an open state is arranged between the first baffle (5) and the link body (11). The damping structure includes a first clamping block (55) arranged on the outer side surface of the second clamping groove (54), and a mating surface arranged on the link body (11) and adapted to be clamped with the first clamping block (55).

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