A drag chain cable for an industrial robot

Abstract

The utility model belongs to the technical field of towed chain cable, concretely is a kind of towed chain cable for industrial robot, including guide core and cladding layer;The outer side of guide core is spirally wound with torsion resistance layer, the torsion resistance layer is double-layer structure, and inside has torsional deformation activity space;The outside of torsion resistance layer is longitudinally covered with buffer layer, the outside of buffer layer is protruding with the support part of axial interval, and the bending deformation activity space is formed between adjacent support part;The outer layer of buffer layer is equipped with shielding layer, and it is double-layer structure, to mutually make up the gap generated when twisting and bending deformation. The torsion resistance layer includes the inner belt body of inner layer and the outer belt body of outer layer, and the mutual approaching surface of inner belt body and outer belt body is equipped with protruding part. By setting the protection assembly of inside and outside double layers and can be mutually staggered in guide core outer, it is combined that shielding layer is layered complementary, and the activity space between protection assembly and shielding layer, to realize the effect that cable guarantees structural integrity under the effect of frequent bending and torsional deformation.

Description

Technical Field

[0001] This utility model belongs to the field of drag chain cable technology, and in particular relates to a drag chain cable for industrial robots. Background Technology

[0002] Industrial robots are core equipment in modern automated manufacturing systems. Their articulated arms and other highly dynamic components require frequent, multi-dimensional, high-speed reciprocating and torsional movements. In such applications, cables that transmit power and signals to servo motors, sensors, and control units are typically installed within cable chain systems for guidance and protection.

[0003] Currently, cables used in industrial robot cable chain systems are subjected to torsional deformation in multiple directions during robot joint movement. Under frequent torsional stress, the cables experience fatigue fracture, which is detrimental to the normal operation of the robot.

[0004] To address the aforementioned issues, this application proposes a drag chain cable for industrial robots. Utility Model Content

[0005] The purpose of this invention is to provide a drag chain cable for industrial robots, which solves the problems in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a drag chain cable for industrial robots, including a conductor core and a sheathing layer;

[0008] The outer side of the guide core is spirally wound with an anti-torsion layer, which has a double-layer structure with internal space for torsional deformation.

[0009] The outer side of the anti-torsion layer is longitudinally wrapped with a buffer layer, and the outer side of the buffer layer has axially spaced support parts that protrude, forming a bending deformation activity space between adjacent support parts.

[0010] The outer layer of the buffer layer is provided with a shielding layer, forming a double-layer structure to compensate for gaps generated during torsion and bending deformation.

[0011] Preferably, the anti-torsion layer includes an inner band of the inner layer and an outer band of the outer layer, and the surfaces of the inner band and the outer band that are close to each other are provided with protrusions.

[0012] Preferably, the sides of adjacent protrusions abut against each other, and a spiral cavity is formed between axially adjacent protrusions.

[0013] Preferably, the shielding layer includes an inner shielding strip and an outer shielding strip, the inner side of the inner shielding strip abuts against the support portion, and the outer shielding strip is fixed to the inner side of the covering layer.

[0014] Preferably, the covering layer has a double-layer structure, including an inner sheath and an outer sheath.

[0015] Preferably, an isolation interface is provided between the inner shielding strip and the outer shielding strip to prevent external tearing.

[0016] Preferably, the protrusion is used to position the spiral laying path of the inner and outer tapes.

[0017] This utility model has the following beneficial effects:

[0018] 1. By spirally winding the anti-torsion layer around the outside of the conductor core, axial and radial displacement is formed when the cable is twisted and deformed, and space for deformation and bending deformation of the conductor core is provided. This allows the sheathing layer to maintain structural stability under frequent torsional deformation of the cable, which is beneficial to extending the stability and life of the cable.

[0019] 2. Through the double-layer shielding structure inside and outside the shielding layer, combined with the cavity between the shielding layer and the buffer layer, the tensile force caused by cable bending deformation can be reduced, the integrity of the shielding structure can be maintained, and the problem of shielding failure under frequent bending deformation can be avoided.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall appearance structure of the cable of this utility model;

[0023] Figure 2 This is a schematic diagram of the cable side structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the combined structure of the buffer layer and the anti-torsion layer of this utility model;

[0025] Figure 4 This is a schematic diagram of the combined structure of the shielding layer and buffer layer of this utility model;

[0026] The attached diagram lists the components represented by each number as follows:

[0027] In the picture:

[0028] 11. Conductor core; 12. Covering layer; 121. Inner sheath; 122. Outer sheath; 13. Anti-torsion layer; 131. Inner band; 132. Outer band; 1301. Protrusion; 14. Buffer layer; 141. Support; 15. Shielding layer; 151. Inner shielding band; 152. Outer shielding band. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] In the description of this utility model, it should be understood that the terms "opening", "top and bottom", "thickness", "top", "middle", "length", "inner" and "around" indicate the orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] A drag chain cable for industrial robots is designed to ensure structural stability under long-term bending and torsional deformation. It features an inner strip 131 and an outer strip 132 with inner and outer layers that form an interlocking structure, as well as a double-layer shielding structure with inner and outer shielding strips 151 and 152 separated. A buffer layer 14 between the shielding layer 15 and the anti-torsion layer 13 provides space for movement during bending and torsional deformation, thereby releasing stress during bending and torsional deformation and helping to ensure the integrity of the cable structure.

[0032] In some embodiments, the specific structure of the drag chain cable for industrial robots is as follows: Figure 1 As shown in Figure 4, it includes a core 11 and a covering layer 12. Between the two, from the inside to the outside, there are an anti-torsion layer 13, a buffer layer 14 and a shielding layer 15, which are used to resist torsion and bending deformation.

[0033] Among them, the conductor core 11 is made of multiple strands of fine oxygen-free copper wire twisted together;

[0034] The coating layer is made of TPU or PVC material through extrusion molding;

[0035] like Figures 1 to 3 As shown, the outer side of the guide core 11 is spirally wound with an anti-torsion layer 13, including an inner layer 131 and an outer layer 132. The adjacent surfaces of the two layers have raised arc structures, which are raised portions 1301. The upper and lower adjacent raised portions 1301 abut against each other.

[0036] It should be noted that the inner belt 131 is a flexible nylon belt, which is spirally wound after being pre-compressed and raised.

[0037] The outer tape 132 is a high-strength PTE tape, which is spirally wound synchronously with the inner tape 131;

[0038] It is understandable that the protrusions 1301 that abut against each other will cause a cavity to be formed between the axially adjacent protrusions 1301 on the outer side of the inner belt 131 or the inner side of the outer belt 132 on the same horizontal plane.

[0039] When the cable is bent or twisted, the inner strip 131 and the outer strip 132 move accordingly following the deformation of the conductor core 11, and squeeze the protrusion 1301 to shrink inward. Then, by utilizing the space provided by the cavity, the covering layer 12 can move, thereby releasing stress and achieving bending and torsion resistance.

[0040] like Figures 1 to 3 As shown, the outer side of the anti-torsion layer 13 is longitudinally covered with a buffer layer 14, and the outer side of the buffer layer 14 is a radially protruding support portion 141.

[0041] Among them, multiple support parts 141 are arranged axially at equal intervals, and a cavity is formed between adjacent support parts 141 to provide space for the inner and outer layer components to move during bending deformation.

[0042] It should be noted that the buffer layer 14 is made of foamed polyethylene or rubber extrusion molding, and the support part 141 is made by molding or extrusion roll forming.

[0043] like Figures 1 to 4 As shown, the shielding layer 15 has an inner shielding strip 151 and an outer shielding strip 152, which are separated from each other.

[0044] Among them, the inner shielding strip 151 is the main shielding strip body, and its inner side abuts against the outside of the support part 141.

[0045] The outer shielding strip 152 is a secondary shielding strip body, used to compensate for the gaps generated when the inner shielding strip 151 is torn and bent.

[0046] It should be noted that the inner shielding strip 151 is a tin-plated copper wire braided layer; the outer shielding strip 152 is an aluminum-plastic composite strip with longitudinal overlapping treatment.

[0047] It is understandable that when the cable is twisted, the inner shielding strip 151 deflects relative to the fixed outer shielding strip 152, thereby releasing stress;

[0048] When the cable is bent, the inner shielding strip 151 squeezes the support portion 141 to deform it and moves within the cavity between adjacent support portions 141, thereby releasing stress.

[0049] like Figure 1 As shown, the sheath 12 has an inner inner sheath 121 and an outer outer sheath 122, with an isolation interface between the two layers. This interface is used to prevent the tear from continuing to spread towards the axis when the outer sheath 122 is torn due to bending and torsional deformation, so as to maintain the temporary use effect of the cable.

[0050] It should be noted that the inner sheath 121 is made of thermoplastic elastomer extrusion coating, and the outer sheath 122 is made of wear-resistant polyurethane extrusion molding.

[0051] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A drag chain cable for industrial robots, characterized in that: Includes a conductor (11) and a covering layer (12); The outer side of the guide core (11) is spirally wound with an anti-torsion layer (13), which is a double-layer structure with an inner and outer layer and an inner space for torsional deformation. The outer side of the anti-torsion layer (13) is longitudinally wrapped with a buffer layer (14), and the outer side of the buffer layer (14) has axially spaced support portions (141), forming a bending deformation activity space between adjacent support portions (141). The outer layer of the buffer layer (14) is provided with a shielding layer (15), which is a double-layer structure to compensate for the gaps generated during torsion and bending deformation.

2. The drag chain cable for industrial robots according to claim 1, characterized in that: The anti-torsion layer (13) includes an inner layer inner band (131) and an outer layer outer band (132), and the inner band (131) and the outer band (132) are provided with protrusions (1301) on their adjacent surfaces.

3. The drag chain cable for industrial robots according to claim 2, characterized in that: The sides of adjacent protrusions (1301) abut against each other, and a spiral cavity is formed between axially adjacent protrusions (1301).

4. The drag chain cable for industrial robots according to claim 1, characterized in that: The shielding layer (15) includes an inner shielding strip (151) and an outer shielding strip (152). The inner side of the inner shielding strip (151) abuts against the support part (141), and the outer shielding strip (152) is fixed to the inner side of the covering layer (12).

5. The drag chain cable for industrial robots according to claim 1, characterized in that: The covering layer (12) has a double-layer structure, including an inner sheath (121) and an outer sheath (122).

6. The drag chain cable for industrial robots according to claim 4, characterized in that: An isolation interface is provided between the inner shielding strip (151) and the outer shielding strip (152) to prevent external tearing.

7. The drag chain cable for industrial robots according to claim 3, characterized in that: The protrusion (1301) is used to position the spiral laying path of the inner tape (131) and the outer tape (132).

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