Multi-core integrated robot cable and working method

Abstract

This invention relates to the field of multi-core integrated cable technology for robots, specifically to a multi-core integrated robot cable and its working method. The cable includes a first core group located at the center, a thermal separation component disposed on its outer side, a second core group and a third core group disposed alternately on the outer side of the thermal separation component along the circumference, and an outer sheath layer. The heat resistance levels of the first, second, and third core groups decrease sequentially. The thermal separation component includes a first thermal separation layer, a second thermal separation layer, and an annular receiving space between the two. The receiving space is provided with multiple heat-insulating bulge structures, and the heat-insulating bulge structures have heat-insulating cavities inside, thereby constructing a radial thermal resistance barrier between the first and third core groups, allowing heat to be preferentially transferred to the second core group and then to the third core group, forming a bend-like, graded heat transfer path, realizing the integrated partitioning of cores with different heat resistance levels, reducing the thermal shock of the low-heat-resistant third core group, and extending the cable life.

Description

Technical Field

[0001] This invention relates to the field of multi-core integrated cables for robots, specifically to a multi-core integrated robot cable and its operating method. Background Technology

[0002] As the integration of industrial robots and service robots continues to increase, a single cable often needs to integrate multiple cable cores, such as power supply lines, control signal lines, and sensor feedback lines. Different types of cable cores have significant differences in conductor cross-section, insulation materials, and heat resistance ratings.

[0003] Currently, the common practice is to simply bundle these cable cores of different heat resistance levels into a cable and extrude a single sheath. This crude integration method does not involve refined thermal management zoning. The heat generated by the high-temperature power cable core in the central area will be directly conducted radially to the low-heat-resistant signal cable core in the outer layer, causing it to be in an environment that exceeds its own tolerance temperature for a long time, accelerating insulation aging, and even causing short-circuit faults, which seriously shortens the overall service life of the cable.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides a multi-core integrated robot cable and its operating method, thereby effectively solving the problems pointed out in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A multi-core integrated robot cable includes: at least one first core group disposed at the center, a thermal separation component coaxially disposed outside the first core group, a second core group and a third core group alternately disposed circumferentially outside the thermal separation component, and an outer sheath layer disposed on the outer layer of the second core group and the third core group. The heat resistance ratings of the first cable core group, the second cable core group, and the third cable core group decrease sequentially. The thermal separation assembly includes a first thermal separation layer and a second thermal separation layer that are coaxially spaced apart, with an annular receiving space formed between the first thermal separation layer and the second thermal separation layer. Multiple heat-insulating bulge structures are arranged circumferentially within the accommodating space. Each heat-insulating bulge structure forms a heat-insulating cavity. The heat-insulating cavity is arranged in a radial direction corresponding to the third cable core group, forming a radial thermal resistance barrier that blocks direct radial heat transfer from the first cable core group to the third cable core group.

[0007] Furthermore, the cross-section of the heat insulation bulge structure is a sheet-like structure, the two circumferential ends of the heat insulation bulge structure are connected to the first thermal separation layer, and the middle part of the heat insulation bulge structure arches towards the side where the second thermal separation layer is located, so as to enclose the heat insulation cavity with the first thermal separation layer.

[0008] Furthermore, the cross-section of the heat insulation bulge structure is a sheet-like structure, and the two circumferential ends of the heat insulation bulge structure are connected to the second thermal separation layer. The middle part of the heat insulation bulge structure arches towards the side where the first thermal separation layer is located, so as to enclose the heat insulation cavity with the second thermal separation layer.

[0009] Furthermore, a transition cavity is formed between adjacent heat insulation bulge structures. The transition cavity is correspondingly arranged with the second cable core group in the radial direction of the cable, forming a directional heat transfer channel that guides the heat of the first cable core group to be preferentially transferred to the second cable core group.

[0010] Furthermore, the transition cavity is filled with a thermally conductive material to enhance the heat transfer efficiency from the first thermal separation layer to the second cable core assembly.

[0011] Furthermore, a heat insulation layer is provided on the heat insulation bulge structure.

[0012] Furthermore, the heat insulation layer is a heat insulation coating or heat insulation film composited on the surface of the heat insulation bulge structure, or a low thermal conductivity filler filled in the heat insulation cavity.

[0013] Furthermore, the width of the heat insulation cavity in the circumferential direction of the cable is greater than or equal to the projected width of the corresponding third cable core assembly in the circumferential direction of the cable.

[0014] The present invention also includes a method for forming a multi-core integrated robot cable as described above, comprising: According to the preset heat resistance grade gradient, the first cable core group, the second cable core group and the third cable core group are prepared respectively, wherein the heat resistance grades of the first cable core group, the second cable core group and the third cable core group decrease in sequence. On the outside of the first cable core assembly, a first thermal separation layer is coaxially wrapped to form an inner core matrix; A second thermal separation layer is coaxially disposed on the outside of the first thermal separation layer, wherein multiple thermal insulation bulge structures are formed at intervals along the circumference of the cable on the outer surface of the first thermal separation layer or on the inner surface of the second thermal separation layer to obtain the cable core. A heat insulation layer is processed on the surface of the heat insulation bulge structure, or heat insulation material is filled inside the heat insulation cavity; Outside the second thermal separation layer, the second and third cable core groups are alternately arranged along the circumference of the cable, and during the arrangement process, the third cable core group is controlled to correspond one-to-one with the thermal insulation cavity in the radial direction of the cable. On the outside of the second and third cable core groups, which are arranged alternately, a coaxial outer sheath is applied to complete the formation of the multi-core integrated robot cable.

[0015] Furthermore, the heat insulation bulge structure and the first heat separation layer, or the heat insulation bulge structure and the second heat separation layer, are integrally formed.

[0016] The technical solution of this invention can achieve the following technical effects: A heat insulation cavity corresponding to the radial direction of the third core group is formed by the heat insulation bulge structure. A radial thermal resistance barrier is built between the first and third core groups to block or weaken the direct radial heat transfer from the first core group to the third core group. The heat generated by the first core group is preferentially transferred to the area where the second core group is located, and then from the area where the second core group is located to the area where the third core group is located. This forms a bend-like and graded heat transfer path. Cores with different heat resistance levels can be integrated and zoned according to their heat resistance capabilities. A three-level gradient temperature field is formed inside the cable from the first core group, the second core group to the third core group. This reduces the thermal shock to the third core group with low heat resistance, slows down the insulation aging and performance degradation of the third core group, and extends the overall service life of the cable. Meanwhile, the heat-insulating bulge structure can also provide a certain deformation buffer during cable bending or twisting, enabling the cable to adapt to the high-frequency reciprocating motion conditions of robots and ensuring the long-term stability of the cable's mechanical and electrical properties. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of a multi-core integrated robot cable; Figure 2 This is a cross-sectional view of a multi-core integrated robot cable (a specific embodiment of the heat-insulating bulge structure). Figure 3 In order to be in Figure 2 A magnified view of a section at point A in the middle; Figure 4 A schematic diagram of the structure combining the first thermal separation layer and the thermal insulation bulge structure; Figure 5 A cross-sectional view of a multi-core integrated robot cable (another specific embodiment of the heat-insulating bulge structure); Figure 6In order to be in Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the structure combining the second thermal separation layer and the thermal insulation bulge structure.

[0019] Reference numerals: 1. First cable core group; 2. Second cable core group; 3. Third cable core group; 4. Thermal separation assembly; 41. First thermal separation layer; 411. Thermal insulation bulge structure; 412. Thermal insulation cavity; 413. Transition cavity; 42. Second thermal separation layer; 43. Accommodation space; 5. Outer sheath layer. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1 to 7 As shown: A multi-core integrated robot cable includes: at least one first core group 1 disposed at the center, a thermal separation component 4 coaxially disposed on the outside of the first core group 1, a second core group 2 and a third core group 3 alternately disposed on the outside of the thermal separation component 4 in the circumferential direction, and an outer sheath layer 5 disposed on the outer layer of the second core group 2 and the third core group 3. The heat resistance levels of the first cable core group 1, the second cable core group 2, and the third cable core group 3 decrease sequentially. In practical applications, the first cable core group 1 can be a power supply cable core, a high current transmission cable core, or a high heat resistance control cable core; the second cable core group 2 can be a medium heat resistance control cable core, an auxiliary power supply cable core, or a medium heat resistance feedback cable core; and the third cable core group 3 can be a signal transmission cable core, a communication cable core, a sensor feedback cable core, or a low heat resistance functional cable core. Through the above-mentioned gradient arrangement of heat resistance levels, the first cable core group 1, which has a higher heat resistance, is concentrated in the central area, while the second and third cable core groups 3, which have a lower heat resistance, are arranged in the peripheral area. This facilitates heat dissipation for the second and third cable cores and, together with the thermal separation component 4, provides directional heat dissipation path protection. The thermal separation assembly 4 includes a first thermal separation layer 41 and a second thermal separation layer 42 that are coaxially spaced apart, and an annular receiving space 43 is formed between the first thermal separation layer 41 and the second thermal separation layer 42. Multiple heat-insulating bulge structures 411 are arranged circumferentially within the accommodating space 43. Each heat-insulating bulge structure 411 forms a heat-insulating cavity 412. The heat-insulating cavity 412 is arranged in a radial direction corresponding to the third cable core group 3, forming a radial thermal resistance barrier that blocks the direct radial heat transfer from the first cable core group 1 to the third cable core group 3. Specifically, radial correspondence means that when the third cable core group 3 is projected radially toward the center of the cable, at least part of the projection area coincides with the heat-insulating cavity 412. With the help of this correspondence, the direct radial heat transfer path from the first cable core group 1 to the third cable core group 3 is blocked by the heat-insulating cavity 412, thereby forming a radial thermal resistance barrier that protects the third cable core group 3, which has the lowest heat resistance level.

[0023] In this embodiment, the first thermal separation layer 41 and the second thermal separation layer 42 can be made of heat-resistant rubber or silicone rubber. The first thermal separation layer 41 is mainly used to separate the first cable core group 1 from the receiving space 43, and the second thermal separation layer 42 is mainly used to separate the receiving space 43 from the outer second cable core group 2 and the third cable core group 3. A stable annular area is formed between the two thermal separation layers, so that the heat insulation bulge structure 411 can be arranged in an orderly manner along the circumference, increasing the buffering effect and avoiding significant misalignment of the heat insulation structure during cable bending and twisting. While ensuring the heat insulation protection effect, the overall bending flexibility of the cable is also taken into account.

[0024] When the cable is energized, such as Figures 1 to 3 As shown by the arrow, the direction of heat transfer is simply indicated. The first cable core group 1 at the center generates heat due to the large current transmission, becoming the main heat source inside the cable. Since the heat insulation cavity 412, which is radially corresponding to the third cable core group 3, forms a radial thermal resistance barrier, it can block or weaken the direct radial conduction of heat generated by the first cable core group 1 to the third cable core group 3. This forces the heat to preferentially transfer to the area without the heat insulation cavity 412, so that the heat generated by the first cable core group 1 is preferentially conducted to the second cable core group 2, and then diffuses from the second cable core group 2 to the third cable core group 3. Only a very small amount of heat can be weakly transferred to the third cable core group 3 through the heat insulation cavity 412 area. This forms a gradient heat transfer path that matches the heat resistance level of the three types of cable core groups, realizing the timing control of heat transfer first to the second cable core group 2 with the medium heat resistance level, and finally to the third cable core group 3 with the low heat resistance level. This completes the fine thermal management zoning inside the cable, avoids the third cable core group 3 with the low heat resistance level being in an over-temperature working environment for a long time, and reduces the risk of insulation aging, performance degradation or failure of the third cable core group 3.

[0025] The heat insulation bulge structure 411 forms a heat insulation cavity 412 that corresponds radially to the third cable core group 3, constructing a radial thermal resistance barrier between the first cable core group 1 and the third cable core group 3. This blocks or weakens the direct radial heat transfer from the first cable core group 1 to the third cable core group 3, allowing the heat generated by the first cable core group 1 to preferentially transfer to the area where the second cable core group 2 is located, and then from the area where the second cable core group 2 is located to the area where the third cable core group 3 is located, thus forming a bend-type, graded heat transfer path. Based on the above structure, cable cores of different heat resistance levels can be integrated and zoned according to their heat resistance capabilities, forming a three-level gradient temperature field inside the cable from the first cable core group 1, the second cable core group 2 to the third cable core group 3. This reduces the thermal shock to the third cable core group 3 with its low heat resistance level, slows down the insulation aging and performance degradation of the third cable core group 3, and extends the overall service life of the cable. At the same time, the heat insulation bulge structure 411 can also provide a certain deformation buffer during cable bending or twisting, enabling the cable to adapt to the high-frequency reciprocating motion conditions of robots and ensuring the long-term stability of the cable's mechanical and electrical properties.

[0026] The outer contour of the heat insulation bulge structure 411 on the cable cross-section can be set as any one of arc, ellipse, U, V or trapezoid. In practical applications, the cross-sectional shape of the heat insulation bulge structure 411 can be adaptively selected according to the radial distance between the first heat separation layer 41 and the second heat separation layer 42, the target volume of the heat insulation cavity 412, the size of the third cable core group 3 and the cable bending performance requirements. All of these are within the protection scope of this application.

[0027] like Figure 3 , 4As shown, a specific embodiment of the heat insulation bulge structure 411 is as follows: the heat insulation bulge structure 411 has a sheet-like cross-section. Both circumferential ends of the heat insulation bulge structure 411 are connected to the first thermal separation layer 41. The middle part of the heat insulation bulge structure 411 arches towards the side where the second thermal separation layer 42 is located, forming a heat insulation cavity 412 with the first thermal separation layer 41. Specifically, the heat insulation cavity 412 is located radially outward of the first thermal separation layer 41 near the third cable core group 3, that is, the heat insulation bulge structure 411 is evenly distributed circumferentially on the outer side of the first thermal separation layer 41, forming a heat insulation area on the side of the third cable core group 3 near the first cable core group 1. Since the heat insulation cavity 412 is arranged on the direct radial heat transfer path between the first cable core group 1 and the third cable core group 3, the heat is blocked by the heat insulation bulge structure 411 before reaching the third cable core group 3. Some of the heat accumulates in the heat insulation cavity 412 and forms a heat insulation area. The insulation cavity 412 forms a temperature retention zone, forcing most of the heat to be preferentially transferred to the adjacent transition cavity 413 and the second cable core group 2, achieving gradient directional heat transfer that matches the heat resistance level of the cable core. Through the heat collection effect of the insulation cavity 412, the heat transferred to the third cable core group 3 is locked in the closed cavity, forming a local thermal resistance barrier that precisely matches the position of the third cable core group 3, blocking the direct radial thermal shock of the central heat source, achieving targeted thermal insulation protection for the low heat resistance third cable core group 3, and avoiding its long-term over-temperature aging. At the same time, the outwardly arched solid sheet structure can form a continuous elastic buffer support between the two thermal separation layers, directly absorbing the interlayer extrusion stress during the high-frequency bending and torsion of the cable. Even if the cable undergoes extreme deformation, it can maintain the sealing and thermal resistance stability of the insulation cavity 412, taking into account both targeted thermal insulation protection and mechanical buffering functions. The thermal management performance remains stable throughout the process, and the service life against repeated bending is improved.

[0028] like Figures 5 to 7As shown, another specific embodiment of the heat insulation bulge structure 411 is as follows: the cross-section of the heat insulation bulge structure 411 is a sheet structure, the two circumferential ends of the heat insulation bulge structure 411 are connected to the second thermal separation layer 42, and the middle part of the heat insulation bulge structure 411 arches towards the side where the first thermal separation layer 41 is located, so as to form a heat insulation cavity 412 with the second thermal separation layer 42. Specifically, the heat insulation cavity 412 is located on the radially inner side of the second thermal separation layer 42 near the third cable core group 3, that is, in the heat insulation bulge structure 411... The second thermal separator layer 42 is evenly distributed circumferentially on its inner side to form a thermal insulation area on the side of the third cable core group 3 closest to the first cable core group 1. It is then blocked by the thermal insulation cavity 412, which is enclosed by the thermal insulation bulge structure 411 and the second thermal separator layer 42. Since the thermal insulation cavity 412 completely covers the radially inner projection area of ​​the third cable core group 3, heat cannot directly penetrate radially to the third cable core group 3. Instead, it is forced to bypass the transition cavity 413 area, which has no thermal insulation cavity 412 blocking the circumferential sides, and preferentially transfer heat to the second cable core group 2. The heat is then transferred from the second core group 2 to the third core group 3. The core advantage of this scheme is that the heat must first pass through the transition cavity 413 area between the first thermal separation layer 41 and the bulge structure. The heat is not easy to directly enter the cavity, so the heat insulation cavity 412 is always in a relatively low temperature state. This forms a low temperature heat insulation buffer zone inside the third core group 3. Through the above structure, the low temperature heat insulation buffer zone of the heat insulation cavity 412 can further improve the radial thermal resistance between the first core group 1 and the third core group 3, reduce the heat transfer efficiency to the third core group 3, reduce the thermal shock to the third core group 3, and avoid the third core group 3 being in an over-temperature environment for a long time. This delays the aging of the insulation layer of the third core group 3 and improves the overall operational stability of the cable. Similarly, the arched part of the heat insulation bulge structure 411 faces the side where the first thermal separation layer 41 is located. When the cable is bent or twisted, the arched structure is supported by the external support of the second thermal separation layer 42 and is not easy to collapse or deform. The shape retention ability and structural stability of the heat insulation cavity 412 are better.

[0029] As a preferred embodiment of the above, a transition cavity 413 is formed between adjacent heat insulation bulge structures 411. The transition cavity 413 and the second cable core group 2 are correspondingly arranged in the radial direction of the cable, forming a directional heat transfer channel that guides the heat of the first cable core group 1 to be preferentially transferred to the second cable core group 2. By arranging the transition cavity 413 and the second cable core group 2 in the radial direction, the heat generated by the first cable core group 1 can be preferentially transferred to the area where the second cable core group 2 is located via the transition cavity 413. Since the heat resistance level of the second cable core group 2 is higher than that of the third cable core group 3, the second cable core group 2 can first receive part of the heat from the first cable core group 1, and then gradually transfer the attenuated heat to the area where the third cable core group 3 is located. Thus, a graded heat transfer path is formed inside the cable from the first cable core group 1, the transition cavity 413, the second cable core group 2 to the third cable core group 3.

[0030] Specifically, after the transition cavity 413 and the heat insulation cavity 412 are combined, a structure with alternating blocking and transition zones is formed in the circumferential direction of the heat separation assembly 4. The heat insulation cavity 412 corresponds to the third cable core group 3 and is used to weaken the direct radial heat transfer from the first cable core group 1 to the third cable core group 3. The transition cavity 413 corresponds to the second cable core group 2 and is used to guide heat preferentially to the second cable core group 2, which has a higher heat resistance rating. Through this structure, the heat generated by the first cable core group 1 is no longer uniformly diffused along the entire radial direction, but is guided to the area where the second cable core group 2 is located, thereby achieving internal heat transfer within the cable. The directional heat transfer of the central core group 413 not only blocks the direct conduction of heat to the third core group 3, but also ensures that the heat generated by the central first core group 1 can be smoothly dissipated outward through the transition cavity 413. This avoids the decrease in cable current carrying capacity caused by heat accumulation in the central area, and balances targeted heat insulation protection with overall heat dissipation efficiency. It solves the long-standing contradiction in the industry of the inability to balance heat insulation protection and central heat dissipation. The transition cavity 413 can be an empty cavity or filled with a specific material. Its main function is to serve as a heat transfer path, in contrast to the heat insulation bulge structure 411 which aims to block heat formation.

[0031] In this embodiment, the transition cavity 413 is filled with a thermally conductive material to enhance the heat transfer efficiency from the first thermal separation layer 41 to the second cable core assembly 2. Specifically, the thermally conductive material can be any one of thermally conductive silicone, thermally conductive ceramic powder-filled resin, or high thermal conductivity graphite tape, as long as it can improve the thermal conductivity of the transition cavity 413. In practical applications, thermally conductive silicone is preferred because it has both high thermal conductivity and elastic deformation capability, which can improve the thermal conductivity while maintaining the buffer energy absorption effect of the transition cavity 413. Through the above optimized design, the technical pain points of insufficient heat transfer efficiency to the second cable core assembly 2 and heat accumulation in the central heat source in the prior art are solved. This technology enhances the thermal conductivity of the directional heat transfer path, accelerates heat dissipation from the central heat source, and prevents excessive heat buildup in the first core group 1, thus preventing overall temperature rise. The thermally conductive material provides a more efficient heat conduction path than air or other low-thermal-conductivity media, allowing the heat generated by the first core group 1 to be transferred more quickly and effectively from the first thermal separation layer 41 to the second core group 2. This not only enhances the heat conduction efficiency from the first thermal separation layer 41 to the second core group 2, ensuring timely heat dissipation, but also effectively controls the operating temperature of the first core group 1, preventing overheating and ultimately improving the overall current-carrying capacity and long-term operational reliability of the cable.

[0032] As a preferred embodiment of the above, a heat insulation layer is provided on the heat insulation bulge structure 411.

[0033] The heat insulation layer is a heat insulation coating or film laminated to the surface of the heat insulation bulge structure 411, or a low thermal conductivity filler filling the heat insulation cavity 412. Specifically, the surface heat insulation layer can be disposed in the inner layer of the heat insulation bulge structure 411, or in the outer layer of the heat insulation bulge structure 411, or heat insulation layers can be disposed in both the inner and outer layers of the heat insulation bulge structure 411. All of these are within the scope of protection of this application. In this preferred embodiment, the implementation of the heat insulation layer includes, but is not limited to, three methods: the first is a heat insulation coating laminated to the surface of the heat insulation bulge structure 411; the second is a heat insulation film laminated to the surface of the heat insulation bulge structure 411; and the third is... The low thermal conductivity filler in the insulation cavity 412, as well as other methods that can improve the thermal insulation performance of the bulge structure, are all within the protection scope of this technical solution. Among them, the thermal insulation coating can be aerogel thermal insulation coating, which has a simple coating process and can be adapted to complex bulge surface structures; the thermal insulation film can be polyimide thermal insulation film, which has stable thermal insulation performance, high mechanical strength, and is suitable for continuous production; the low thermal conductivity filler can be aerogel particles or glass fiber cotton, which can further reduce the heat conduction inside the insulation cavity 412 and greatly improve the thermal insulation effect. In practical applications, a single thermal insulation method or a combination of multiple methods can be flexibly selected according to the temperature resistance requirements of the cable.

[0034] As a preferred embodiment, the width of the heat insulation cavity 412 in the circumferential direction of the cable is greater than or equal to the projected width of the corresponding third cable core group 3 in the circumferential direction of the cable. This ensures that the heat insulation cavity 412 can fully cover the corresponding third cable core group 3 in the circumferential direction of the cable, so that the heat insulation cavity 412 formed inside the heat insulation bulge structure 411 can more comprehensively and effectively block the direct radial heat transfer from the first cable core group 1 to the third cable core group 3, thereby forming a more complete and reliable radial thermal resistance barrier.

[0035] The present invention also includes a method for forming a multi-core integrated robot cable as described above, comprising: S10: According to the preset heat resistance grade gradient, prepare the first cable core group 1, the second cable core group 2 and the third cable core group 3 respectively, wherein the heat resistance grades of the first cable core group 1, the second cable core group 2 and the third cable core group 3 decrease in sequence. S20: On the outside of the first cable core group 1, the first thermal separation layer 41 is coaxially wrapped to form the inner core matrix; S30: A second thermal separator layer 42 is coaxially disposed on the outside of the first thermal separator layer 41. Multiple heat insulation bulge structures 411 are formed at intervals along the circumference of the cable on the outer surface of the first thermal separator layer 41 or on the inner surface of the second thermal separator layer 42 to obtain the cable core. Specifically, taking the processing of the heat insulation bulge structure 411 of the first thermal separator layer 41 as an example, it can be integrally extruded, or the heat insulation bulge structure 411 can be externally processed and then bonded to the surface of the first thermal separator layer 41 along the extrusion direction of the first thermal separator layer to achieve the combination of the first thermal separator layer 41 and the heat insulation bulge structure 411. S40: Processing a heat insulation layer on the surface of the heat insulation bulge structure 411, or filling the heat insulation cavity 412 with heat insulation material; specifically, a heat insulation layer can be formed by brushing heat insulation material on the surface of the heat insulation bulge structure 411, or a heat insulation layer can be bonded to the surface of the heat insulation bulge structure 411, or a heat insulation material can be filled inside the heat insulation cavity 412, all of which are within the protection scope of this application.

[0036] S50: On the outside of the second thermal separation layer 42, the second cable core group 2 and the third cable core group 3 are alternately arranged along the circumference of the cable. During the arrangement process, the third cable core group 3 is controlled to correspond one-to-one with the heat insulation cavity 412 in the radial direction of the cable. S60: On the outside of the second core group 2 and the third core group 3, which are arranged alternately, the outer sheath layer 5 is coaxially wrapped to complete the forming of the multi-core integrated robot cable.

[0037] Specifically, a continuous extrusion molding process can be used to prepare multi-core integrated robot cables. During molding, the first core assembly 1 is continuously fed into the extrusion equipment, and a first thermal separator layer 41 is coaxially extruded on the outside of the first core assembly 1 to obtain the inner core matrix. Subsequently, based on the inner core matrix, a second thermal separator layer 42 is coaxially extruded on the outside of the first thermal separator layer 41. Multiple heat-insulating bulge structures 411 are simultaneously formed on the side of the first thermal separator layer 41 facing the second thermal separator layer 42, or on the side of the second thermal separator layer 42 facing the first thermal separator layer 41, through an extrusion die with circumferentially spaced forming cavities. This creates a receiving space 43 between the first thermal separator layer 41 and the second thermal separator layer 42. The heat insulation bulge structure 411 forms a heat insulation cavity 412; then the second core group 2 and the third core group 3 are arranged alternately in the circumferential direction along the outer periphery of the second heat separation layer 42, so that the third core group 3 corresponds to the heat insulation cavity 412 in the radial direction of the cable; finally, the outer sheath layer 5 is continuously extruded on the outside of the alternately arranged second core group 2 and third core group 3, thereby completing the continuous forming of the multi-core integrated robot cable. Through the above-mentioned flow-type extrusion forming method, the heat resistance level zoning of the first core group 1, the second core group 2 and the third core group 3, as well as the radial positioning correspondence between the heat insulation cavity 412 and the third core group 3 can be realized simultaneously during the cable forming process, thereby improving the consistency of the heat insulation structure and the production stability.

[0038] As a preferred embodiment of the above, the heat insulation bulge structure 411 and the first thermal separation layer 41, or the heat insulation bulge structure 411 and the second thermal separation layer 42, are integrally formed. Specifically, the extrusion mold can be made into a shape that adapts to the first separation layer and the heat insulation bulge structure 411, or the extrusion mold can be made into a shape that adapts to the second thermal separation layer 42 and the heat insulation bulge, so as to integrally form the first separation layer with the heat insulation bulge structure 411 or the second separation layer with the heat insulation bulge structure 411. This effectively avoids the interface defects and thermal bridge effects that may be caused by traditional separate manufacturing and assembly. The integral forming ensures a seamless connection between the heat insulation bulge structure 411 and the thermal separation layer, improves the sealing and heat insulation performance of the heat insulation cavity 412, and thus more effectively blocks the radial heat transfer from the first cable core group 1 to the third cable core group 3. In addition, the integral forming process simplifies the manufacturing process, reduces the assembly difficulty and production cost, and enhances the mechanical strength and durability of the cable in robot application scenarios such as bending and twisting, thereby improving the overall reliability and service life of the multi-core integrated robot cable.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-core integrated robot cable, characterized in that, include: At least one first core group is disposed at the center, a heat-separating component is coaxially disposed outside the first core group, a second core group and a third core group are alternately disposed circumferentially outside the heat-separating component, and an outer sheath layer is disposed on the outer layer of the second core group and the third core group. The heat resistance ratings of the first cable core group, the second cable core group, and the third cable core group decrease sequentially. The thermal separation assembly includes a first thermal separation layer and a second thermal separation layer that are coaxially spaced apart, with an annular receiving space formed between the first thermal separation layer and the second thermal separation layer. Multiple heat-insulating bulge structures are arranged circumferentially within the accommodating space. Each heat-insulating bulge structure forms a heat-insulating cavity. The heat-insulating cavity is arranged in a radial direction corresponding to the third cable core group, forming a radial thermal resistance barrier that blocks direct radial heat transfer from the first cable core group to the third cable core group.

2. The multi-core integrated robot cable according to claim 1, characterized in that, The heat insulation bulge structure has a sheet-like cross-section. The two circumferential ends of the heat insulation bulge structure are connected to the first thermal separation layer. The middle part of the heat insulation bulge structure arches towards the side where the second thermal separation layer is located, so as to form the heat insulation cavity by enclosing the first thermal separation layer.

3. The multi-core integrated robot cable according to claim 1, characterized in that, The heat insulation bulge structure has a sheet-like cross-section. The two circumferential ends of the heat insulation bulge structure are connected to the second thermal separation layer. The middle part of the heat insulation bulge structure arches towards the side where the first thermal separation layer is located, so as to enclose the heat insulation cavity with the second thermal separation layer.

4. The multi-core integrated robot cable according to claim 1, characterized in that, A transition cavity is formed between adjacent heat insulation bulge structures. The transition cavity is correspondingly arranged with the second cable core group in the radial direction of the cable, forming a directional heat transfer channel that guides the heat of the first cable core group to be preferentially transferred to the second cable core group.

5. The multi-core integrated robot cable according to claim 4, characterized in that, The transition cavity is filled with a thermally conductive material to enhance the heat transfer efficiency from the first thermal separator layer to the second cable core assembly.

6. The multi-core integrated robot cable according to claim 1, characterized in that, The heat insulation bulge structure is provided with a heat insulation layer.

7. The multi-core integrated robot cable according to claim 6, characterized in that, The heat insulation layer is a heat insulation coating or heat insulation film composited on the surface of the heat insulation bulge structure, or a low thermal conductivity filler filled in the heat insulation cavity.

8. The multi-core integrated robot cable according to claim 1, characterized in that, The width of the heat insulation cavity in the circumferential direction of the cable is greater than or equal to the projected width of the corresponding third cable core assembly in the circumferential direction of the cable.

9. A method for forming a multi-core integrated robot cable as described in claim 1, characterized in that, include: According to the preset heat resistance grade gradient, the first cable core group, the second cable core group and the third cable core group are prepared respectively, wherein the heat resistance grades of the first cable core group, the second cable core group and the third cable core group decrease in sequence. On the outside of the first cable core assembly, a first thermal separation layer is coaxially wrapped to form an inner core matrix; A second thermal separation layer is coaxially disposed on the outside of the first thermal separation layer, wherein multiple thermal insulation bulge structures are formed at intervals along the circumference of the cable on the outer surface of the first thermal separation layer or on the inner surface of the second thermal separation layer to obtain the cable core. A heat insulation layer is processed on the surface of the heat insulation bulge structure, or heat insulation material is filled inside the heat insulation cavity; Outside the second thermal separation layer, the second and third cable core groups are alternately arranged along the circumference of the cable, and during the arrangement process, the third cable core group is controlled to correspond one-to-one with the thermal insulation cavity in the radial direction of the cable. On the outside of the second and third cable core groups, which are arranged alternately, a coaxial outer sheath is applied to complete the formation of the multi-core integrated robot cable.

10. The method for forming a multi-core integrated robot cable according to claim 9, characterized in that, The heat insulation bulge structure and the first heat separation layer, or the heat insulation bulge structure and the second heat separation layer, are integrally formed.

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