Anti-falling structure for drag chain

Abstract

An anti-falling structure for a drag chain is arranged corresponding to the connecting position of main pieces connected front and back and is in running fit with the main pieces in a vertical plane. The anti-falling structure is T-shaped, is arranged in the thickness direction of the main leaf, and comprises a locking block arranged on the outer side of the main leaf, a fixing shaft inserted into the main leaf in the thickness direction of the main leaf, a first limiting block arranged in the length direction of the main leaf, and a second limiting block arranged in the thickness direction of the main leaf; the first limiting block and the second limiting block are hidden and limited in the main piece; during locking, the locking block is rotated, and the projection of the limiting part on the locking block in the left-right direction is located on the outer side face, connected with the main piece, of the main piece. According to the scheme, the shape of the hook head portion of the anti-disengaging structure can be combined with the main pieces more firmly, the anti-disengaging structure has higher tensile capacity, the limiting portion of the anti-disengaging structure is arranged corresponding to the outer sides of the main pieces connected with the main pieces, the main pieces connected front and back are prevented from relative displacement in the inner direction and the outer direction, and the phenomenon that the drag chain disengages and even is broken is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of drag chains, and in particular to an anti-slip structure for drag chains. Background Art

[0002] Drag chains are generally used to pull and protect cables, oil pipes, air pipes, water pipes, and air ducts of machine tools and machinery. Drag chains have been widely used in CNC electronic equipment, stone machinery, glass machinery, manipulators, lifting and transportation equipment, automated warehouses, robot arms, etc.

[0003] As we all know, the shape of the drag chain is similar to the tracks of tanks and tractors. It includes a left single chain, a right single chain and a cross bar that positions and connects the left and right single chains. The left single chain and the right single chain are arranged in pairs, and the structures of the two are symmetrical. The two single chains are composed of several main plates connected end to end, and the outer side of the rear part of the front main plate and the inner side of the front part of the rear main plate are overlapped in the inner and outer directions, and the two are connected to each other in a vertical plane through the hole-shaft cooperation.

[0004] It has been found in long-term use that the drag chain may become disjointed or even break due to heavy loads, frequent bending and flipping movements during operation, which may cause the front and rear adjacent main plates to separate from each other in the inner and outer directions.

[0005] Therefore, how to solve the above-mentioned deficiencies in the prior art has become a subject to be studied and solved by the present invention. Summary of the invention

[0006] The purpose of the present invention is to provide an anti-slip structure for a drag chain.

[0007] To achieve the above object, the technical solution adopted by the present invention is: an anti-slip structure for a drag chain, the drag chain includes two single chains and a cross bar for positioning and connecting the two single chains, the two single chains are composed of a plurality of main pieces connected front and back, and their length direction corresponds to the front and back direction, and the thickness direction corresponds to the left and right direction, the main pieces connected front and back are rotatably connected in a vertical plane, the anti-slip structure is arranged corresponding to the connection of the main pieces connected front and back, and is rotatably matched with the main pieces in the vertical plane; The anti-slip structure is T-shaped and arranged along the thickness direction of the main sheet, and includes a locking block arranged on the outside of the main sheet, a fixing shaft inserted into the main sheet along the thickness direction of the main sheet, a first limiting block arranged along the length direction of the main sheet, and a second limiting block arranged along the thickness direction of the main sheet; wherein the first limiting block and the second limiting block are both hidden and limited inside the main sheet; The locking block includes a fixing portion and a limiting portion; the fixing portion is fixedly connected to the first end of the fixing shaft, the second end of the fixing shaft is fixedly connected to the first end of the first limiting block, the second end of the first limiting block is fixedly connected to the first end of the second limiting block, and the second end of the second limiting block extends toward the inside of the main piece. When locking, the locking block is rotated so that the projection of the limiting portion in the left and right directions is located on the outer side of the main piece connected to the main piece.

[0008] In the above scheme, the anti-slip structure is in a T-shape, wherein the fixed shaft, the first limit block and the second limit block together constitute the hook head, so that the anti-slip structure is more firmly combined with the main piece and has a stronger tensile strength. The limit block is used to prevent the main piece connected to the main piece from relatively displacing outward, even if two adjacent main pieces or three connected main pieces are not separated from each other in the inner and outer directions, the spacing in the inner and outer directions will not increase, so that the connected main pieces exist as a whole during operation, avoiding the phenomenon of the drag chain being disjointed or even broken.

[0009] In the above scheme, the anti-slip structure and the main piece are detachably installed, and the disassembly and assembly process is simple: after the connected main pieces are assembled, the anti-slip structure is inserted into the corresponding position on the main piece, and then the anti-slip structure is rotated to make the first limit block and the second limit block turn to the arc-shaped limit groove. At this time, the anti-slip structure is limited on the main piece, and the limit end of the anti-slip structure also realizes the limitation of the connected main piece; when disassembling, the anti-slip structure is rotated in the opposite direction to make the first limit block and the second limit block disengage from the arc-shaped limit groove, and then the anti-slip structure can be pulled out.

[0010] In the above scheme, by setting the first limit block and the second limit block in different directions, the anti-slip structure is hook-shaped, which strengthens the strength of the anti-slip structure and the main piece in the combined state, and finally ensures that the connected main pieces do not loosen in the inner and outer directions.

[0011] A further technical solution is that the main piece is provided with a receiving groove for accommodating the locking block, the receiving groove has a notch to prevent the locking block from projecting onto the connected main piece, and the depth of the receiving groove is greater than or equal to the thickness of the locking block; the outer side of the end of the connected main piece is an inwardly recessed step surface, and the projection of the limiting part in the left and right directions is located on the step surface. The depth of the receiving groove is greater than or equal to the thickness of the locking block to prevent the locking block from protruding from the surface of the main piece and being hit by the outside during operation, resulting in erroneous rotation, and then erroneously eliminating the limiting effect on the connected main piece.

[0012] According to a further technical solution, a plurality of anti-slip structures are provided on the main plate, and the anti-slip structures are symmetrically arranged in the vertical direction, wherein when locked, the locking blocks of a part of the anti-slip structures rotate only in the clockwise direction, and the locking blocks of another part of the anti-slip structures rotate only in the counterclockwise direction. The locking directions of the plurality of anti-slip structures are inconsistent, that is, the unlocking directions of the plurality of anti-slip structures are also inconsistent, so as to avoid the situation that all the anti-slip structures are unlocked synchronously due to external force during operation.

[0013] A further technical solution is that the main plate is provided with an installation groove for auxiliary anti-slip structure installation, a columnar limit groove corresponding to the fixed shaft, and an arc-shaped limit groove corresponding to the first limit block and the second limit block. The starting end of the arc-shaped limit groove is connected to the installation groove, and the terminal end of the arc-shaped limit groove corresponds to the limit position of the unidirectional rotation of the anti-slip structure. The cross-sectional shape of the arc-shaped limit groove corresponds to the cross-sectional shape of the first limit block and the second limit block; during installation, the fixed shaft is aligned with the columnar limit groove, the first limit block is aligned with the installation groove, and then inserted into the main plate inwardly. When locking, the limit block is rotated to make the first limit block and the second limit block displace along the arc-shaped limit groove. When displaced to the terminal end of the arc-shaped limit groove, the limit block rotates to the limit position, at which time the projection area of ​​the limit block on the adjacent main plate is the largest. The setting of the arc-shaped limit groove can quickly help the operator rotate the locking block to the optimal position, and the optimal position corresponds to the maximum projection area of ​​the limit block on the adjacent main plate. The anti-slip structure is convenient for assembly and disassembly. When disassembling, the locking block only needs to be rotated to make the first limiting block and the second limiting block separate from the arc-shaped limiting groove, and then pulled out.

[0014] In a further technical solution, the locking block is circular, the center of the circle is the fixing portion, and the circular surface of the circle is the limiting portion. This structure is suitable for a straight-line main piece.

[0015] In a further technical solution, the locking block is fan-shaped, the center side of the fan is the fixing part, and the arc side of the fan is the limiting part. This structure is suitable for a Z-shaped main piece. Compared with other shapes, the fan-shaped design has the largest projection area projected onto the rear main piece. The larger the area, the better the limiting effect.

[0016] According to a further technical solution, when in the extreme position, the projection area of ​​the locking block on the connected main piece is the largest.

[0017] In a further technical solution, the accommodating groove has a limiting surface for limiting the further rotation of the locking block, and when corresponding to the limiting surface, the projection area of ​​the locking block on the connected main piece is the largest. The setting of the limiting surface can, on the one hand, enable the operator to quickly rotate the locking block to the optimal position, and on the other hand, enable locking and unlocking to be in opposite directions.

[0018] According to a further technical solution, an operating groove for applying force is provided on the locking block. When the locking block needs to be driven to rotate, a screwdriver is inserted into the operating groove, and then force is applied to the screwdriver to rotate the locking block.

[0019] The advantages of the present invention are as follows: In this case, the anti-slip structure used to prevent the connected main plates from loosening inside and outside is in the shape of a T. The shape of its hook head can be more firmly combined with the main plate and has a stronger tensile strength. Its limiting part is arranged corresponding to the outer side of the main plate connected to the main plate to prevent the connected main plates from being displaced outward relative to the main plate, so that the connected main plates will not be separated from each other in the inside-outside direction, and the spacing between them will not increase, so that the connected main plates exist as a whole during operation and will not loosen, thereby avoiding the phenomenon of the drag chain being disjointed or even broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 This is a schematic diagram of the structure of a drag chain consisting of a straight-line main piece according to an embodiment of the present invention; Attached Figure 2 This is a schematic diagram of the structure of a single chain consisting of a straight-line main piece according to an embodiment of the present invention; Attached Figure 3 This is a schematic diagram of the structure of a drag chain consisting of a Z-shaped main piece according to an embodiment of the present invention; Attached Figure 4 This is a schematic diagram of the structure of a single chain consisting of a Z-shaped main piece according to an embodiment of the present invention; Attached Figure 5 This is a schematic diagram of the structure of a Z-shaped main sheet according to an embodiment of the present invention; Attached Figure 6 This is a schematic structural diagram of the outer side surface of the Z-shaped main plate according to an embodiment of the present invention; Attached Figure 7 This is a schematic structural diagram of the inner side of the Z-shaped main plate according to an embodiment of the present invention; Attached Figure 8 This is a schematic diagram of the cross-sectional structure of a Z-shaped main sheet according to an embodiment of the present invention (with an anti-slip structure installed); Attached Fig. 9 The structure diagram of the locking block in the embodiment of the present invention is a fan-shaped anti-slip structure Figure 1 ; Attached Fig.10 The structure diagram of the locking block in the embodiment of the present invention is a fan-shaped anti-slip structure Figure 2 ; Attached Fig.11 It is a structural schematic diagram of an anti-slip structure in which the locking block is circular according to an embodiment of the present invention.

[0021] In the above drawings: 1. single chain; 2. cross bar; 3. locking block; 3a. fixing part; 3b. limiting part; 4. fixing shaft; 5. first limiting block; 6. second limiting block; 7. front connecting piece; 8. rear connecting piece; 9. accommodating groove; 11. step surface; 12. limiting surface; 13. installation groove; 14. columnar limiting groove; 15. arc-shaped limiting groove; 16. operating groove; a. front main piece; b. middle main piece; c. rear main piece; e. front main piece; f. rear main piece. Implementation

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Embodiment: The present invention will be clearly described below with diagrams and detailed descriptions. After understanding the embodiments of the present invention, any person skilled in the art can make changes and modifications based on the techniques taught by the present invention without departing from the spirit and scope of the present invention.

[0023] The terms used herein are only for describing specific embodiments and are not intended to be limiting of the present invention. Singular forms such as "a", "this", "here", "this" and "the" as used herein also include plural forms.

[0024] The terms “first”, “second”, etc. used in this document do not specifically refer to an order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0025] As used herein, “connected” or “positioned” may refer to two or more components or devices being in direct physical contact with each other, or being in indirect physical contact with each other, or may refer to two or more components or devices operating or moving with each other.

[0026] The terms “include,” “including,” “have,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0027] The terms used in this document generally have the ordinary meaning of each term used in this field, in the context of the case and in the specific context, unless otherwise noted. Certain terms used to describe the present invention will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present invention.

[0028] The terms "front", "back", "up", "down", "left", "right", etc. used in this article are all directional terms. In this case, they are only used to illustrate the positional relationship between the various structures, and are not used to limit the protection plan of this case and the specific direction during actual implementation.

[0029] See attached Figure 1-11As shown, an anti-slip structure for a drag chain includes two single chains 1 and a cross bar 2 for positioning and connecting the two single chains 1. The two single chains 1 are composed of several main plates connected front to back, and their length direction corresponds to the front-to-back direction, and the thickness direction corresponds to the left-to-right direction. The main plates connected front to back are rotatably connected in a vertical plane.

[0030] The main piece is divided into a straight main piece (see Figure 1-2 ) and Z-shaped main piece (see Figure 3-7 ), a single chain 1 formed by connecting straight main pieces, the specific connection method is as follows: among the three main pieces connected in front, middle and back, the inner side of the rear part of the front main piece a is overlapped with the outer side of the front part of the middle main piece b, and the outer side of the rear part of the middle main piece b is overlapped with the inner side of the front part of the rear main piece c.

[0031] Z-shaped main piece (see Figure 3-7 ) includes a front connecting piece 7 and a rear connecting piece 8, wherein the inner side of the rear portion of the front connecting piece 7 is overlapped with the outer side of the front portion of the rear connecting piece 8, and the single chain formed by Z-shaped main pieces is specifically connected as follows: the outer side of the rear portion of the front main piece e of the two main pieces connected front and rear is overlapped with the inner side of the front portion of the rear main piece f.

[0032] The anti-slip structure is arranged at the connection point of the front and rear connected main pieces, and cooperates with the main pieces to rotate in a vertical plane; for a single chain 1 formed by I-shaped main pieces, the anti-slip structure is arranged in the middle of the middle main piece b, and corresponds to the rear of the front main piece a and the front of the rear main piece c; for a single chain 1 formed by Z-shaped main pieces, the anti-slip structure is arranged in the overlapping area of ​​the front and rear connecting pieces.

[0033] The anti-slip structure is T-shaped and arranged along the thickness direction of the main piece, including a locking block 3 arranged on the outside of the main piece, a fixed shaft 4 inserted into the main piece along the thickness direction of the main piece, a first limit block 5 arranged along the length direction of the main piece, and a second limit block 6 arranged along the thickness direction of the main piece; wherein the first limit block 5 and the second limit block 6 are both hidden and limited inside the main piece.

[0034] The locking block 3 includes a fixing portion 3a and a limiting portion 3b; the fixing portion 3a is fixedly connected to the first end of the fixing shaft 4, the second end of the fixing shaft 4 is fixedly connected to the first end of the first limiting block 5, the second end of the first limiting block 5 is fixedly connected to the first end of the second limiting block 6, and the second end of the second limiting block 6 extends toward the inside of the main piece. When locking, the locking block 3 is rotated so that the projection of the limiting portion 3b in the left and right directions is located on the outer side of the main piece connected to the main piece. Specifically, for the straight main piece (see Figure 1-2 ) are connected to form a single chain 1, in the locked state, the projection of the locking block 3 in the anti-slip structure in the left and right directions is simultaneously located on the front main piece a, the middle main piece b and the rear main piece c that are connected in sequence; for the Z-shaped main piece (see Figure 3-7 ) connected into a single chain 1 (see Figure 3-4), in the locked state, the projection of the locking block 3 in the anti-slip structure in the left and right directions is simultaneously located on the front main piece e and the rear main piece f connected front and back.

[0035] The main plate is provided with a receiving groove 9 for accommodating the locking block 3, and the receiving groove 9 has a notch to avoid the projection of the locking block 3 onto the connected main plate, and the depth of the receiving groove 9 is greater than or equal to the thickness of the locking block 3; the outer side of the end of the connected main plate is an inwardly recessed step surface 11, and the projection of the limiting portion 3b in the left and right directions is located on the step surface 11.

[0036] The main plate is provided with a plurality of anti-slip structures, and each anti-slip structure is symmetrically arranged in the up and down directions. When locked, the locking blocks 3 of one part of the anti-slip structures only rotate in the clockwise direction, and the locking blocks 3 of another part of the anti-slip structures only rotate in the counterclockwise direction.

[0037] The main plate is provided with an installation groove 13 for installing an auxiliary anti-slip structure, a columnar limit groove 14 corresponding to the fixed axis 4, and an arc-shaped limit groove 15 corresponding to the first limit block 5 and the second limit block 6. The cross-sectional shape of the arc-shaped limit groove 15 corresponds to the cross-sectional shape of the first limit block 5 and the second limit block 6; the starting end of the arc-shaped limit groove 15 is connected to the installation groove 13, and the end end of the arc-shaped limit groove 15 corresponds to the limit position of the unidirectional rotation of the anti-slip structure.

[0038] The locking block 3 is provided with an operating groove 16 for applying force.

[0039] When the single chain is composed of a straight main piece, the anti-drop structure is rotatably assembled in the middle of the middle main piece b, and the outer sides of both ends of the front and rear main pieces are provided with the step surface 11; the locking block 3 is circular (see Fig.11 ), the center of the circle is the fixing portion 3a, the circular surface is the limiting portion 3b, and the limiting portion 3b is arranged corresponding to the step surface 11 on the outer side of the rear end of the front main piece a and the outer side of the front end of the rear main piece c, and the center of the locking block 3 is located at the midpoint of the line connecting the rear end of the front main piece and the front end of the rear main piece. During the rotation of the locking block 3, the projection area of ​​the upper limiting portion 3b of the locking block 3 on the front and rear main pieces remains unchanged, and the rotation is only used to realize the locking and unlocking function of the anti-slip structure for the main piece. In the locked state, the locking block 3 can simultaneously realize the positioning connection of the front, middle and rear three main pieces, and the three will not be disengaged from each other in the inner and outer directions.

[0040] When the single chain is composed of Z-shaped main pieces, each main piece is provided with the anti-slip structure, and each anti-slip structure is arranged in the overlapping area of ​​the front and rear connecting pieces 8. The overlapping area has a large thickness and a large strength. On the one hand, it is convenient to assemble the anti-slip structure, and on the other hand, it can resist a greater pulling force during the operation of the main piece. The cross section of the locking block 3 is a fan-shaped (see Figure 9-10), the central end of the sector is the fixing portion 3a, the arc end of the sector is the limiting portion 3b, and the extension direction of the second end of the first limiting block 5 is consistent with the extension direction of the limiting portion 3b of the locking block 3. When locking, the anti-drop structure on the front main piece e is rotated to rotate the locking block 3 toward the rear main piece f, until it abuts against the limiting surface 12 of the accommodating groove 9 or rotates to the terminal end of the arc-shaped limiting groove 15. At this time, the projection area of ​​the limiting portion 3b of the locking block 3 on the rear main piece f is the largest. When unlocking, the locking block 3 is rotated in the opposite direction to return the limiting portion 3b to the accommodating groove 9.

[0041] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-slip structure for a drag chain, the drag chain comprising two single chains (1) and a cross bar (2) for positioning and connecting the two single chains (1), the two single chains (1) are composed of a plurality of main plates connected front and back, and their length direction corresponds to the front and back direction, and the thickness direction corresponds to the left and right direction, and the main plates connected front and back are rotatably connected in a vertical plane, characterized in that: The anti-slip structure is arranged at the connection of the main pieces connected front and back, and is rotatably matched with the main pieces in a vertical plane; The anti-slip structure is T-shaped and arranged along the thickness direction of the main sheet, comprising a locking block (3) arranged on the outside of the main sheet, a fixing shaft (4) inserted into the main sheet along the thickness direction of the main sheet, a first limiting block (5) arranged along the length direction of the main sheet, and a second limiting block (6) arranged along the thickness direction of the main sheet; wherein the first limiting block (5) and the second limiting block (6) are both hidden and limited inside the main sheet; The locking block (3) comprises a fixing portion (3a) and a limiting portion (3b); the fixing portion (3a) is fixedly connected to the first end of the fixing shaft (4); the second end of the fixing shaft (4) is fixedly connected to the first end of the first limiting block (5); the second end of the first limiting block (5) is fixedly connected to the first end of the second limiting block (6); the second end of the second limiting block (6) extends toward the inside of the main piece; when locking, the locking block (3) is rotated so that the projection of the limiting portion (3b) in the left-right direction is located on the outer side of the main piece connected to the main piece.

2. The anti-slip structure for a drag chain according to claim 1, characterized in that: The main plate is provided with a receiving groove (9) for receiving the locking block (3), the receiving groove (9) having a notch to prevent the locking block (3) from being projected onto the connected main plate, and the depth of the receiving groove (9) is greater than or equal to the thickness of the locking block (3); The outer side of the end of the connected main piece is an inwardly recessed step surface (11), and the projection of the limiting portion (3b) in the left-right direction is located on the step surface (11).

3. The anti-slip structure for a drag chain according to claim 1, characterized in that: The main plate is provided with a plurality of anti-slip structures, each of which is symmetrically arranged in the up-down direction, wherein, when locked, the locking blocks (3) of one part of the anti-slip structures rotate only in the clockwise direction, and the locking blocks (3) of another part of the anti-slip structures rotate only in the counterclockwise direction.

4. The anti-slip structure for a drag chain according to claim 1, characterized in that: The main plate is provided with an installation groove (13) for installing an auxiliary anti-slip structure, a columnar limit groove (14) arranged corresponding to the fixed shaft (4), and an arc-shaped limit groove (15) arranged corresponding to the first limit block (5) and the second limit block (6); the starting end of the arc-shaped limit groove (15) is connected to the installation groove (13), and the end end of the arc-shaped limit groove (15) corresponds to the extreme position of rotation of the anti-slip structure.

5. An anti-slip structure for a drag chain according to any one of claims 1 to 4, characterized in that: The locking block (3) is circular, the center of the circle is the fixing portion (3a), and the circular surface of the circle is the limiting portion (3b).

6. An anti-slip structure for a drag chain according to any one of claims 1 to 4, characterized in that: The locking block (3) is fan-shaped, the center side of the fan-shaped is the fixing portion (3a), and the arc side of the fan-shaped is the limiting portion (3b).

7. The anti-drop structure for a drag chain according to claim 6, characterized in that: When in the extreme position, the projection area of ​​the locking block (3) on the connected main piece is the largest.

8. The anti-slip structure for a drag chain according to claim 6, characterized in that: The accommodating groove (9) has a limiting surface (12) for limiting the continued rotation of the locking block (3); when corresponding to the limiting surface (12), the projection area of ​​the locking block (3) on the connected main piece is the largest.

9. The anti-drop structure for a drag chain according to claim 1, characterized in that: The locking block (3) is provided with an operating groove (16) for facilitating the application of force.

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