Robot drag chain cable

Abstract

The utility model relates to the technical field of cables, and provides a robot drag chain cable, which comprises a central tensile element, a conductor core layer, an inner insulating sleeve layer, an inner shielding layer, an outer insulating sleeve layer, an inner sheath layer, an outer shielding layer and an outer sheath layer, and the central tensile element is Kevlar fiber. The robot drag chain cable has the advantages that the Kevlar fiber is used as the central tensile element, so that the weight of the cable can be reduced, the bending resistance of the robot drag chain cable is remarkably improved, and the service life of the cable is prolonged. The joint action of the inner shielding layer and the outer shielding layer realizes the double-layer shielding effect, effectively reduces the electrostatic effect, and improves the anti-interference capability of the robot drag chain cable.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a kind of robot drag chain cable. BACKGROUND

[0002] Drag chain cable is a kind of special cable specially designed for dynamic environment, it needs to follow processing equipment, robot and the frequent movement, bending and twisting of various automation devices.Especially as the key component of industrial robot to transfer power and control signal, its performance is crucial.

[0003] In order to ensure that robot drag chain cable has high flexibility, wear resistance, bending resistance and tensile resistance, its structural design usually includes the following aspects: conductor structure, core insulation, tensile element, stranded wire structure, inner sheath, shielding braid layer and outer sheath.Among them, the conductor is twisted by ultra-fine bare copper wire or fine bare copper wire to ensure excellent electrical conductivity and flexibility;Each conductor is embedded with galvanized steel wire to enhance the overall tensile strength.The shielding layer is made of copper wire or aluminum foil, which can effectively reduce the influence of electromagnetic interference (EMI).

[0004] However, with the increasing requirements of production efficiency and operation rhythm, drag chain cable must withstand more frequent bending and twisting operations, while the influence of electromagnetic interference on processing precision is also increasingly significant.The existing drag chain cable structure faces challenges in actual use, and shows the problems of short service life and insufficient anti-interference ability when working under high-strength reciprocating motion and severe electromagnetic interference. INVENTION CONTENTS

[0005] The utility model solves the technical problem in the prior art, and provides a robot drag chain cable.

[0006] The utility model solves the technical problem by adopting the following technical scheme: a robot drag chain cable is provided, which comprises a central tensile element, a conductor core layer, an inner insulation sleeve layer, an inner shielding layer, an outer insulation sleeve layer, an inner sheath layer, an outer shielding layer and an outer sheath layer.The inner insulation sleeve layer is arranged outside the conductor core layer, the inner shielding layer is wrapped outside the inner insulation sleeve layer, the outer insulation sleeve is arranged outside the inner shielding layer, the outer insulation sleeve layer surrounds the periphery of the central tensile element, the outer insulation sleeve layer and the central tensile element are extruded into the space surrounded by the inner sheath layer, the outer shielding layer is wrapped outside the inner sheath layer, the outer shielding layer is provided with the outer sheath layer outside, and the central tensile element is made of Kevlar fiber.

[0007] In the above-mentioned robot drag chain cable, the inner shielding layer is formed by wrapping aluminum foil.

[0008] In the robot drag chain cable, the outer shielding layer is formed by braiding alloy wires, and the braiding density is not less than 80%.

[0009] In the robot drag chain cable, the conductor core layer is formed by complex twisting.

[0010] In the robot drag chain cable, the outer insulation sleeve layer is complex twisted on the periphery of the central tensile element.

[0011] In the robot drag chain cable, the outer insulation sleeve layer is provided with a thin non-woven fabric.

[0012] In the robot drag chain cable, the inner insulation sleeve layer and the outer insulation sleeve layer are both TPE insulation layers.

[0013] In the robot drag chain cable, the space surrounded by the inner sheath layer is filled with nylon reinforcing material.

[0014] In the robot drag chain cable, the inner sheath layer is a PVC inner sheath layer.

[0015] In the robot drag chain cable, the outer sheath layer is made of polyurethane.

[0016] Compared with the prior art, the robot drag chain cable has the advantages that by using Kevlar fiber as the central tensile element, the bending resistance of the robot drag chain cable can be significantly improved while the weight of the cable is reduced, thereby prolonging the service life of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a sectional view of the robot drag chain cable.

[0018] In the figure, 1 is a central tensile element, 2 is a conductor core layer, 3 is an inner insulation sleeve layer, 4 is an inner shielding layer, 5 is an outer insulation sleeve layer, 6 is an inner sheath layer, 7 is an outer shielding layer, 8 is an outer sheath layer, 9 is a thin non-woven fabric, and 10 is nylon reinforcing material. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the utility model and is further described in combination with the drawings, but the utility model is not limited to these embodiments.

[0020] As shown in the figure, the robot drag chain cable of the utility model comprises: Figure 1

[0021] ​The center tensile element 1, the conductor core layer 2, the inner insulation jacket layer 3, the inner shielding layer 4, the outer insulation jacket layer 5, the inner sheath layer 6, the outer shielding layer 7, and the outer sheath layer 8 are provided. The conductor core layer 2 is provided with the inner insulation jacket layer 3. The inner shielding layer 4 is wrapped outside the inner insulation jacket layer 3. The outer insulation jacket is provided outside the inner shielding layer 4. The outer insulation jacket layer 5 surrounds the outer periphery of the center tensile element 1. The outer insulation jacket layer 5 and the center tensile element 1 are extruded in the space surrounded by the inner sheath layer 6. The outer shielding layer 7 is wrapped outside the inner sheath layer 6. The outer sheath layer 8 is provided outside the outer shielding layer 7. The center tensile element 1 is made of Kevlar fiber.

[0022] By setting the Kevlar fiber as the center tensile element 1, the bending resistance of the robot drag chain cable can be significantly improved while reducing the weight of the cable, thereby prolonging the service life of the cable. The combined action of the inner shielding layer 4 and the outer shielding layer 7 realizes a double-layer shielding effect, effectively reduces the static effect, and improves the anti-interference ability of the robot drag chain cable. Preferably, the conductor core layer 2 is composed of a soft copper wire in accordance with the 6th type in GB / T 3956-2008 standard, which increases the softness of the conductor core layer 2. The inner sheath layer 6 is used to reduce the friction between the outer insulation jacket layer 5 and the outer shielding layer 7, and the outer sheath layer 8 provides physical protection.

[0023] The inner shielding layer 4 of the present scheme is formed by wrapping aluminum foil. Using aluminum foil as the first layer of shielding not only provides softness to the wire core layer, but also effectively shields electromagnetic interference.

[0024] The outer shielding layer 7 of the present scheme is formed by weaving alloy wires, adopting a single-layer and single-direction winding structure, and the weaving density is not less than 80%. The unique chemical element combination of the alloy makes the outer shielding layer 7 have high strength, good softness, excellent shielding and anti-magnetic performance, and the characteristics of not easy to produce static effect, thereby significantly improving the anti-interference ability of the robot drag chain cable.

[0025] The conductor core layer 2 of the present scheme is formed by complex twisting to form a complex twisted conductor, and the outer insulation jacket layer 5 is complex twisted around the outer periphery of the center tensile element 1. By using a complex twisted conductor and appropriately controlling the strand pitch and the complex twisting pitch, the stability of the structure of the conductor core layer 2 can be maintained, the stress of the conductor core layer 2 can be evenly distributed when bending, and mechanical stress concentration can be avoided, thereby significantly improving the bending fatigue life. The conductor core layer 2, the inner insulation jacket layer 3, the inner shielding layer 4, and the outer insulation jacket layer 5 jointly constitute a cable core structure. The cable core and the Kevlar fiber form an insulated wire core, which is arranged in a straight line at the center of the cable. The periodic stress is directly applied to the conductor core layer 2, the inner insulation layer, and the outer insulation layer. The cable core around the Kevlar fiber is arranged in a spiral shape. This structure helps to disperse the bending stress and avoid stress concentration in the local inner insulation layer, outer insulation layer, and conductor core layer 2.

[0026] The outer insulation jacket 5 of the scheme is externally provided with a thin non-woven fabric 9, and the space surrounded by the inner sheath layer 6 is filled with nylon reinforcing material 10, and the crossing area of the complexed cable core, that is, the center of the whole cable, is filled with Kevlar fiber, which can effectively protect the cable core structure and prevent the complexed cable core from drifting to the center area of the cable. The cable core gap is filled with nylon reinforcing material 10, and the outside is wrapped with two layers of thin soft non-woven fabric. The thin non-woven fabric 9 not only forms an isolation between the inner sheath layer 6 and the cable core, but also plays a certain role in tightening and positioning the cable core, thereby improving the service life of the cable.

[0027] The inner insulation jacket 3 and the outer insulation jacket 5 of the scheme are both made of TPE material, so as to ensure excellent insulation performance while providing the necessary softness.

[0028] The inner sheath layer 6 of the scheme is a PVC inner sheath layer 6, which can reduce the friction between the insulation layer and the shielding layer and protect the insulated core wire from damage. The inner sheath should be made by extrusion molding process to ensure that the twisted wire structure will not be scattered.

[0029] The outer sheath layer 8 of the scheme is composed of polyurethane, which provides physical protection and prevents the erosion of grease and other chemicals. The polyurethane material has excellent bending resistance, wear resistance and good softness at low temperature, so it can better meet the requirements of wear resistance, bending resistance and softness of the robot drag chain cable.

[0030] By setting the Kevlar fiber as the central tensile element 1, the bending resistance of the robot drag chain cable can be significantly improved while reducing the weight of the cable, thereby prolonging the service life of the cable. The combined action of the inner shielding layer 4 and the outer shielding layer 7 realizes a double shielding effect, effectively reduces the static effect, and improves the anti-interference ability of the robot drag chain cable.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0032] In addition, in the present application, the description of "first", "second", "one" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements internal communication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, the above-mentioned term can be understood according to the specific meaning in the utility model.

[0034] In addition, the technical solutions of various embodiments of the utility model can be combined with each other, but must be based on the realization of the ordinary skill in the art, when the combination of technical solutions appears mutual contradiction or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the utility model. The person skilled in the art of the utility model can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the range defined by the spirit of the utility model.

Claims

1. A robotic drag chain cable, characterized by, The cable comprises a central tensile element, a conductor core layer, an inner insulation jacket layer, an inner shielding layer, an outer insulation jacket layer, an inner sheath layer, an outer shielding layer, and an outer sheath layer, the conductor core layer is provided with the inner insulation jacket layer outside, the inner shielding layer is wrapped outside the inner insulation jacket layer, the inner shielding layer is provided with the outer insulation jacket outside, the outer insulation jacket layer surrounds the periphery of the central tensile element, the outer insulation jacket layer and the central tensile element are extruded into the space surrounded by the inner sheath layer, the outer shielding layer is wrapped outside the inner sheath layer, the outer shielding layer is provided with the outer sheath layer outside, and the central tensile element is made of Kevlar fiber.

2. A robotic drag chain cable as claimed in claim 1, wherein, The inner shielding layer is wrapped by aluminum foil.

3. A robotic drag chain cable as claimed in claim 1, wherein, The outer shielding layer is woven by alloy wires, and the weaving density is not less than 80%.

4. A robotic drag chain cable as claimed in claim 1, wherein, The conductor core layer is formed by complex twisting.

5. A robotic drag chain cable as claimed in claim 1, wherein, The outer insulation jacket layer is complex twisted around the periphery of the central tensile element.

6. A robotic drag chain cable as claimed in claim 5, wherein, The outer insulation jacket layer is provided with a thin non-woven fabric outside.

7. A robotic drag chain cable as claimed in claim 1, wherein, The inner insulation jacket layer and the outer insulation jacket layer are both TPE insulation layers.

8. A robotic drag chain cable as claimed in claim 1, wherein, The space surrounded by the inner sheath layer is filled with nylon reinforcing material.

9. A robotic drag chain cable as claimed in claim 1, wherein, The inner sheath layer is a PVC inner sheath layer.

10. A robotic drag chain cable as claimed in claim 1, wherein, The outer sheath layer is made of polyurethane.

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