CN216697837U

CN216697837U - Flexible body cable for robot

Info

Publication number: CN216697837U
Application number: CN202122079199.XU
Authority: CN
Inventors: 汤代兵; 廖孝彪
Original assignee: Guangzhou Yuhong Technology Co ltd
Current assignee: Guangzhou Yuhong Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-06-07
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to the technical field of cables, in particular to a flexible body cable for a robot, which has strong corrosion resistance, wear resistance, bending resistance, distortion resistance and interference resistance.

Description

Flexible body cable for robot

Technical Field

The utility model relates to the technical field of cables, in particular to a flexible body cable for a robot.

Background

Industrial robots are multi-joint manipulators or multi-degree-of-freedom robots for industrial applications. An industrial robot is a machine device which automatically executes work, and is a machine which realizes various functions by means of self power and control capability. The robot can accept human command and operate according to a preset program, and modern industrial robots can also perform actions according to a principle formulated by artificial intelligence technology.

The traditional robot only completes complex mechanical actions, a control unit and a signal unit of the robot are connected and completed by a specific cable, and the industrial robot also needs to meet the stable working requirements of a security system, a network system, a control system and a data processing system besides the complex mechanical actions, so that the working requirements put forward higher requirements on the functions and the performances of the connected cable, particularly the requirements on bending resistance, wear resistance, corrosion resistance and interference resistance on the performances, and the requirements on the functions and the performances are met, and brand new consideration needs to be carried out on the structural design and the use materials of the composite cable.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a flexible body cable for a robot, which is resistant to structural deformation and mechanical fatigue, and in order to achieve the aim, the utility model provides the flexible body cable for the robot, which consists of an inner conductor, an insulating layer, a reinforcing core, a wrapping layer, an inner protective layer, a shielding layer and an outer protective layer, wherein the insulating layer wraps the inner conductor to form a wire core, the wire cores are twisted pairwise to form a wire core twisted body, the wire core twisted body is twisted around the reinforcing core to form a wire core compound twisted body, the wrapping layer is wrapped on the wire core compound twisted body in 360 degrees, the inner protective layer is wrapped on the wrapping layer, the shielding layer wraps the inner protective layer, the twisting pitch of the wire core twisted body is 6 times of twisting outer diameter, and the wire core twisting pitch is 18 times of the twisting outer diameter of the conductor, the lay length of the wire core compound stranded body is 14 times of the stranded outer diameter of the conductor.

Furthermore, the inner conductor is formed by twisting a plurality of strands of fine copper wires and aramid yarns.

Further, the insulating layer is made of polyvinyl fluoride material.

Furthermore, the reinforced core is an aramid yarn rope tensile structure with an insulating layer.

Furthermore, the wrapping layer is made of non-woven fabric materials.

Further, the inner sheath layer is made of an elastic polyurethane material.

Furthermore, the shielding layer is formed by weaving copper foil wires in 360 degrees.

Furthermore, the outer protective layer is made of a thermoplastic polyurethane elastomer material.

The beneficial effects of the utility model are: the method is characterized in that a conductor bundle wire is used for insulating and extruding, a cable core is stranded, a metal shield is used for shielding, a sheath is extruded, a plurality of strands of superfine conductors of elastic aramid yarns are added, the procedures of conductor bundle stranding and compound stranding are completed by utilizing the stranding pitch with a small pitch-diameter ratio, and the structural stability of a cable core during circular motion, bending and twisting motion is realized by using a polyvinyl fluoride material with corrosion resistance, wear resistance and bending resistance, so that the destructiveness of the structural deformation and mechanical fatigue of a robot body cable to the cable structure is solved.

Drawings

For ease of illustration, the present invention is described in detail by the following preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic diagram of a flexible body cable structure for a robot according to the present invention;

in the figure: the cable comprises an inner conductor-1, an insulating layer-2, a wrapping layer-3, an inner protective layer-4, a shielding layer-5, an outer protective layer-6 and a reinforced core-7.

Detailed Description

The flexible body cable for a robot according to the present invention will be further described with reference to the accompanying drawings:

the flexible body cable for the robot shown in fig. 1 is composed of an inner conductor, an insulating layer, a reinforcing core, a wrapping layer, an inner protective layer, a shielding layer and an outer protective layer, wherein the insulating layer wraps the inner conductor to form a wire core, the wire cores are twisted in pairs to form a wire core twisted body, a second layer is formed to increase the mechanical fatigue resistance of the cable, and the shielding layer is prevented from being damaged when the cable is bent and twisted. The cable core twisted body is twisted into a cable core compound twisted body around the reinforcing core, the wrapping layer is wrapped on the cable core compound twisted body in a 360-degree wrapping mode, the inner protection layer is extruded on the wrapping layer, the shielding layer is wrapped on the inner protection layer, the outer protection layer is wrapped on the shielding layer, the twisting distance of the cable core twisted body is 6 times of twisting outer diameter, the pitch of the cable core twisted body is 18 times of the twisting outer diameter of the conductor, and the twisting distance of the cable core compound twisted body is 14 times of the twisting outer diameter of the conductor.

The inner conductor is formed by stranding a plurality of strands of fine copper wires and aramid yarns. The structure meets the requirement that the conductor has good bending resistance, and plays a role in increasing the mechanical fatigue resistance of the cable by the fifth layer.

The insulating layer is made of polyvinyl fluoride material. The material has good mechanical strength, strong tear resistance and high tensile strength, can reduce the thickness of a wire core insulating layer, has better flexibility under a certain bending radius, and has longer service life.

The reinforced core is an aramid yarn rope tensile structure with an insulating layer. The structure can effectively protect the stranded wire structure, prevent the stranded wires from dissociating to the central area of the cable, and play a role in increasing the mechanical fatigue resistance of the cable on the fourth layer.

The wrapping layer is made of non-woven fabric materials. Plays a role in fastening the cable core, prolongs the service life of the cable,

the inner protective layer is made of elastic polyurethane material. The material has good fracture toughness and fixed elongation force, ensures that the cable has the requirement of bending resistance, and plays a role in increasing the mechanical fatigue resistance of the cable on the third layer.

The shielding layer is formed by weaving copper foil wires in 360 degrees. The interference of external electromagnetic waves to internal signals can be effectively prevented, and the copper foil wire has good tensile resistance.

The outer jacket is made of a thermoplastic polyurethane elastomer material, and the material has high bending resistance, abrasion resistance and good flexibility at low temperature, better meets the requirements of the robot body cable on bending resistance, torsion resistance and abrasion resistance, and plays a role in increasing the mechanical fatigue resistance of the cable on the first layer.

In order to solve the problem of structural deformation, the cable is produced by adopting a method of 'small pitch-diameter ratio', when a conductor is stranded and twisted repeatedly, the pitch-diameter ratio is larger when a core wire is twisted in pairs and cabled, the twisting lay length is larger, if the design of the pitch-length ratio is adopted, when the conductor or an untwisted parallel wire bundle in the core wire is bent, a single wire at the outer side of the wire bundle is stretched, a single wire at the inner side is compressed, two sides of the robot body cable generate resistance to bending, the single wire at each side is deformed once in the bending and straightening processes, and the stranded wire is bent, because each single wire is spirally wound around the stranded wire, when the stranded wire is bent, each single wire is stretched and compressed, the compressed part moves to the stretched part, only friction generated when the single wire moves is needed, the friction is much smaller than the resistance generated by bending of the parallel wire bundle, so the service life of the stranded conductor adopting the large pitch-diameter ratio is far shorter than that of the small pitch-diameter ratio stranded conductor, the technology verifies that when the conductor bundle wires are twisted with the compound wires and the core wires are twisted in pair and the cable is formed at a certain pitch, the structural deformation of the conductor bundle wires is minimum to the bending resistance damage of the cable, and meanwhile, a pre-back twisting method is adopted in the pair twisting process and the cable forming process during production, and the method is used for offsetting all or part of twisting caused by self rotation in the pair twisting or cable forming process, eliminating the process of twisting stress and reducing the damage of the insulating layer.

Because above-mentioned structure possesses good mechanical properties, chemical properties, and electric property ensures that cable structure dependable performance, consequently this novel cable product can connect and use in the control system of robots such as mechanical assembly, welding, spraying, thermal treatment, high low temperature operation among the industrial production manufacturing system.

The foregoing summary and structure are provided to explain the principles, general features, and advantages of the product and to enable others skilled in the art to understand the utility model. The foregoing examples and description have been presented to illustrate the principles of the utility model and are intended to provide various changes and modifications within the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a flexible body cable for robot which characterized in that: the flexible body cable for the robot is composed of an inner conductor, an insulating layer, a reinforcing core, a wrapping layer, an inner protection layer, a shielding layer and an outer protection layer, wherein the insulating layer wraps the inner conductor to form a wire core, every two wires of the wire core are twisted to form a wire core twisted body, the wire core twisted body is twisted to form a wire core compound twisted body around the reinforcing core, the wrapping layer wraps the wire core compound twisted body on the wire core compound twisted body in 360 degrees, the inner protection layer is wrapped on the wrapping layer in a squeezing mode, the shielding layer wraps the inner protection layer, the outer protection layer wraps the shielding layer, the wire core twisted body is 6 times of twisting outer diameter, the pitch of the wire core twisted body is 18 times of the conductor twisting outer diameter, and the wire core compound twisted body twisting distance is 14 times of the conductor twisting outer diameter.

2. The flexible body cable for a robot according to claim 1, wherein: the inner conductor is formed by stranding a plurality of strands of fine copper wires and aramid yarns.

3. The flexible body cable for a robot according to claim 1, wherein: the insulating layer is made of polyvinyl fluoride material.

4. The flexible body cable for a robot according to claim 1, wherein: the reinforced core is an aramid yarn rope tensile structure with an insulating layer.

5. The flexible body cable for a robot according to claim 1, wherein: the wrapping layer is made of non-woven fabric materials.

6. The flexible body cable for the robot as claimed in claim 1, wherein the inner sheath is made of an elastic polyurethane material.

7. The flexible body cable for a robot according to claim 1, wherein: the shielding layer is formed by weaving copper foil wires in 360 degrees.

8. The flexible body cable for a robot according to claim 1, wherein: the outer protective layer is made of thermoplastic polyurethane elastomer materials.