Crosslinked polyethylene insulated power cable for humanoid robot

Abstract

The invention relates to the technical field of cables, in particular to a cross-linked polyethylene insulated power cable for a humanoid robot, which comprises a plurality of groups of conductors, a heat insulation and heat conduction structure, a sheath, a heat dissipation structure and a power cable, and the insulating layer is arranged on the sheath and is in contact with the heat-insulating heat-conducting structure inside the sheath. The conductors are separated through the partition plates and the partition edge strips on the partition plates, and the situation that heat cannot be dissipated effectively due to the fact that the cable cores are attached together is avoided. By means of the heat conduction strips embedded in the separation edge strips and the heat conduction aluminum foil layers making contact with the heat conduction strips, heat generated by the conductors can be conducted outwards, and heat concentration in the cable is avoided. Through the heat dissipation structure which is arranged on the cable joint and is in contact with the heat-conducting aluminum foil layer, heat in the heat-conducting aluminum foil layer can be rapidly taken away through the cooling channel in the heat dissipation structure, so that the purpose of heat dissipation is achieved.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a cross-linked polyethylene insulated power cable for humanoid robots. Background Technology

[0002] With breakthroughs in artificial intelligence and robotics, humanoid robots are moving from the laboratory to commercial applications, which places extremely high demands on the insulation, flexibility, heat dissipation, durability, and signal transmission quality of the cable systems used on humanoid robots.

[0003] The insulation structure of existing industrial robot cables mostly uses cross-linked polyethylene material. Since humanoid robot joints need to move frequently (such as bionic arms and legs), the cable's bending resistance needs to be ≥10 million times, and the bending resistance needs to be 1-2 million times. There are problems such as breakage, signal interference or fatigue failure due to repeated bending, which makes it difficult to meet the continuous movement requirements of humanoid robot multi-degree-of-freedom joints (such as wrists and ankles).

[0004] Furthermore, the joint cavities of humanoid robots are generally less than 15mm, and the cable diameter is required to be no more than 15mm. To minimize the cable diameter, the cable cores inside are generally stranded. During the frequent movements of the humanoid robot, the heat generated at the joints between the cable cores cannot be effectively dissipated, leading to overheating problems in the cable. Summary of the Invention

[0005] In response to the technical problems of current industrial robot cables being prone to breakage due to repeated bending, failing to meet the continuous movement requirements of humanoid robots, and being unable to effectively dissipate heat, this invention proposes a cross-linked polyethylene insulated power cable for humanoid robots.

[0006] The technical problem to be solved by this invention is achieved by the following technical solution: A cross-linked polyethylene insulated power cable for humanoid robots, comprising: Conductors, arranged in several groups, are used for signal transmission and control; A heat-insulating and heat-conducting structure, in which several groups of conductors are installed side by side, is used to separate the groups of conductors, to prevent the conductors from sticking together and being unable to dissipate heat, and to conduct the heat generated by the conductors outward. The sheath, placed on the outside of the thermal insulation and heat-conducting structure, is used to protect the conductor; The heat dissipation structure is installed on the sheath and in contact with the heat insulation and heat conduction structure inside the sheath. It is used to absorb the heat dissipated by the heat insulation and heat conduction structure and dissipate the heat.

[0007] As a further improvement of the present invention, each of the several groups of conductors includes a cable core, an insulation layer and a shielding layer sequentially covering the outside of the cable core.

[0008] As a further improvement of the present invention, the heat insulation and heat conduction structure includes several partition plates that are attached to each other along the axial direction of the cable. Each partition plate is provided with several partition strips along the circumferential direction. The area between two adjacent partition strips is the insertion area. Several heat conduction strips are embedded in the interior of the partition strips and are arranged radially to conduct heat outward. The radial outer end of the heat conduction strips extends to the radial outer end face of the partition strip.

[0009] As a further improvement of the present invention, a fitting sleeve is provided on the outside of the shielding layer, and the outer contour of the fitting sleeve is adapted to the area contour between two adjacent dividing strips.

[0010] As a further improvement of the present invention, several partition strips are provided with embedded through grooves inside, and several heat-conducting strips are embedded in the corresponding embedded through grooves.

[0011] As a further improvement of the present invention, the heat-conducting strip has a flat structure.

[0012] As a further improvement of the present invention, the heat insulation and heat conduction structure also includes a heat-conducting aluminum foil layer wrapped between the partition plate and the sheath, wherein the inner side of the heat-conducting aluminum foil layer is in contact with the heat-conducting strip and the outer side is in contact with the heat dissipation structure.

[0013] As a further improvement of the present invention, the heat dissipation structure includes a heat dissipation retaining ring disposed at the cable joint, a cooling channel disposed inside the heat dissipation retaining ring, and a connecting end disposed outside the heat dissipation retaining ring, wherein the inner circumferential surface of the heat dissipation retaining ring is in contact with the thermally conductive aluminum foil layer.

[0014] As a further improvement of the present invention, the cooling channel is a circular channel, and the heat dissipation ring is provided with an inlet and an outlet that are connected to the cooling channel, with the inlet and outlet arranged opposite to each other.

[0015] As a further improvement of the present invention, the substrate of the sheath and the insulating layer is cross-linked polyethylene.

[0016] The beneficial effects of this invention are: 1. This invention provides a cross-linked polyethylene insulated power cable for humanoid robots, in which the conductors are separated by a separator plate and its separator strips, thus avoiding the cable cores from sticking together and thus failing to dissipate heat effectively.

[0017] 2. The present invention provides a cross-linked polyethylene insulated power cable for humanoid robots. Through the heat-conducting strip embedded in the dividing strip and the heat-conducting aluminum foil layer in contact with the heat-conducting strip, the heat generated by the conductor can be conducted outward, avoiding the heat concentration inside the cable.

[0018] 3. This invention provides a cross-linked polyethylene insulated power cable for humanoid robots. Through a heat dissipation structure set at the cable joint and in contact with the heat-conducting aluminum foil layer, the heat inside the heat-conducting aluminum foil layer can be quickly carried away through the internal cooling channel, thereby achieving the purpose of heat dissipation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the isometric structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 A schematic diagram of the cable structure with the heat dissipation retainer and sheath removed; Figure 4 A schematic diagram of a cable structure with the heat dissipation retainer, sheath, and thermally conductive aluminum foil layer removed. Figure 5 A schematic diagram of a structure for attaching and connecting several partition plates; Figure 6 A schematic diagram of a single partition plate and its heat-conducting strip in a three-dimensional structure. Figure 7 A schematic diagram of the cross-sectional structure of a single partition plate and its heat-conducting strip; Figure 8 This is a schematic diagram of the cross-sectional structure of a single partition plate; Figure 9 This is a schematic diagram of the three-dimensional structure of the heat-conducting strip; Figure 10 This is a schematic diagram of the cross-sectional structure of the heat dissipation retainer.

[0020] In the diagram: 1. Cable core; 2. Insulation layer; 3. Shielding layer; 4. Insertion sleeve; 5. Separator plate; 6. Separator strip; 7. Embedded through groove; 8. Heat-conducting strip; 9. Heat-conducting aluminum foil layer; 10. Sheath; 11. Heat dissipation retaining ring; 12. Cooling channel; 13. Water inlet; 14. Water outlet; 15. Connection end. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figures 1 to 10 As shown, a cross-linked polyethylene insulated power cable for humanoid robots mainly includes a conductor, a heat-insulating and heat-conducting structure, a sheath 10, and a heat dissipation structure.

[0023] The conductors are used for signal transmission and control, and have insulation and shielding properties. In this embodiment, four sets of conductors are arranged side by side on the heat-insulating and heat-conducting structure. The heat-insulating and heat-conducting structure separates the four sets of conductors, preventing them from sticking together and preventing heat dissipation, and also dissipates the heat generated by the conductors outward. The sheath 10 is disposed outside the heat-insulating and heat-conducting structure. The sheath 10 protects the conductors. A thermally conductive aluminum foil layer 9 is wrapped between the sheath 10 and the heat-insulating and heat-conducting structure. The thermally conductive aluminum foil layer 9 serves two purposes: firstly, it further dissipates the heat dissipated by the heat-insulating and heat-conducting structure to the outside of the cable; secondly, it works with the heat-insulating and heat-conducting structure to wrap the conductors into a whole, enhancing mechanical properties. In addition, the thermally conductive aluminum foil layer 9 also provides further shielding. The heat dissipation structure is disposed on the sheath 10 and in contact with the thermally conductive aluminum foil layer 9. It absorbs and dissipates the heat dissipated by the heat-insulating and heat-conducting structure. The heat dissipation structure is generally located at the cable joint and is clipped onto the cable.

[0024] The conductors are used for signal transmission and control, and have insulation and shielding properties. Four sets of conductors are provided, each set including a cable core 1, an insulation layer 2 sequentially covering the cable core 1, and a shielding layer 3. In this embodiment, the cable core 1 is silver-plated copper wire; the insulation layer 2 is ETFE, manufactured using a co-extrusion process to ensure concentricity deviation ≤5%; the shielding layer 3 uses high-density tin-plated copper wire braided shielding (coverage ≥85%), effectively suppressing high-frequency interference. Each of the four sets of conductors is equipped with a mounting sleeve 4.

[0025] The heat insulation and heat conduction structure includes several partition plates 5 that are attached to each other along the cable axis. Each partition plate 5 has several partition strips 6 arranged circumferentially. In this embodiment, each partition plate 5 has four partition strips 6, which are equidistantly distributed circumferentially. The area between two adjacent partition strips 6 is the insertion area, and the outer contour of the insertion sleeve 4 is adapted to the contour of the area between two adjacent partition strips 6. The four partition strips 6 on each partition plate 5 have embedded through grooves 7 arranged radially. The groove openings of the embedded through grooves 7 are located on the radial end face of the partition strips 6. A heat-conducting strip 8 is embedded in the embedded through groove 7. The heat-conducting strip 8 is adapted to the size of the embedded through groove 7 and is flush with the groove opening, thereby ensuring contact with the heat-conducting aluminum foil layer 9. Furthermore, the heat-conducting strip 8 has a flat structure, which can effectively reduce the squeezing force of the conductor on the heat-conducting strip 8 when the cable is bent, and ensure the service life of the heat-conducting strip 8.

[0026] Specifically, the partition plate 5 can be made of flexible rubber material, and adjacent partition plates 5 can be welded together sequentially by ultrasonic welding.

[0027] As a further improvement to this embodiment, the heat dissipation structure includes a heat dissipation retaining ring 11 disposed at the cable joint, a cooling channel 12 disposed inside the heat dissipation retaining ring 11, and a connecting end 15 disposed outside the heat dissipation retaining ring 11. The inner circumferential surface of the heat dissipation retaining ring 11 contacts the thermally conductive aluminum foil layer 9, and the heat in the thermally conductive aluminum foil layer 9 can be quickly removed through the cooling channel 12. The cooling channel 12 is a circular channel, and the heat dissipation retaining ring 11 is correspondingly provided with an inlet 13 and an outlet 14 connected to the cooling channel 12, with the inlet 13 and the outlet 14 arranged opposite to each other. Since this invention is applied to humanoid robots, which generally have water-cooling systems, this invention connects the inlet 13 and the outlet 14 to the cooling pipes of the water-cooling system on the humanoid robot, thereby forming a cooling loop without the need for additional heat dissipation structures. The connecting end 15 can fix the heat dissipation structure to the robot. The heat dissipation retaining ring 11 in this invention is disposed at the cable joint, which can dissipate heat without being affected by cable bending.

[0028] As a further improvement to this embodiment, the base material of the sheath 10 and the insulation layer 2 is cross-linked polyethylene, which improves the insulation performance of the cable.

[0029] During use, the heat generated by the cable core 1 is conducted to the heat-conducting strip 8 in the separator plate 5. Since the heat-conducting aluminum foil layer 9 is in contact with the heat-conducting strip 8, it will absorb the heat in the heat-conducting strip 8. As the heat in the heat-conducting aluminum foil layer 9 increases, the cooling channel 12 in the heat dissipation ring 11 will carry the heat in the heat-conducting aluminum foil layer 9 through heat exchange, thereby achieving the purpose of heat dissipation for the cable.

[0030] 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 prisms 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 this invention is defined by the appended claims and their equivalents.

Claims

1. A cross-linked polyethylene insulated power cable for humanoid robots, characterized in that: include: Conductors, arranged in several groups, are used for signal transmission and control; A heat-insulating and heat-conducting structure, in which several groups of conductors are installed side by side, is used to separate the groups of conductors, to prevent the conductors from sticking together and being unable to dissipate heat, and to conduct the heat generated by the conductors outward. A sheath (10) is provided on the outside of the heat-insulating and heat-conducting structure, and the sheath (10) is used to protect the conductor; The heat dissipation structure is set on the sheath (10) and in contact with the heat insulation and heat conduction structure inside the sheath (10), and is used to absorb the heat dissipated by the heat insulation and heat conduction structure and dissipate heat.

2. The cross-linked polyethylene insulated power cable for humanoid robots according to claim 1, characterized in that: Each of the several groups of conductors includes a cable core (1), an insulation layer (2) and a shielding layer (3) that are sequentially wrapped around the outside of the cable core (1).

3. The cross-linked polyethylene insulated power cable for humanoid robots according to claim 2, characterized in that: The heat insulation and heat conduction structure includes several partition plates (5) that are attached to each other along the cable axis. Each partition plate (5) has several partition strips (6) arranged in the circumferential direction. The area between two adjacent partition strips (6) is the insertion area. Several heat conduction strips (8) are embedded in the interior of the partition strips (6) to conduct heat outward in a radial direction. The radial outer end of the heat conduction strips (8) extends to the radial outer end face of the partition strips (6).

4. The cross-linked polyethylene insulated power cable for humanoid robots according to claim 3, characterized in that: The shielding layer (3) is provided with a fitting sleeve (4) on its outside. The outer contour of the fitting sleeve (4) is adapted to the area contour between two adjacent dividing strips (6).

5. A cross-linked polyethylene insulated power cable for a humanoid robot according to claim 3, characterized in that: Several dividing strips (6) have embedded through grooves (7) inside, and several heat-conducting strips (8) are embedded in the corresponding embedded through grooves (7).

6. A cross-linked polyethylene insulated power cable for a humanoid robot according to claim 5, characterized in that: The heat-conducting strip (8) has a flat structure.

7. A cross-linked polyethylene insulated power cable for a humanoid robot according to claim 3, characterized in that: The thermal insulation and heat conduction structure also includes a thermally conductive aluminum foil layer (9) wrapped between the partition plate (5) and the sheath (10). The inner side of the thermally conductive aluminum foil layer (9) is in contact with the thermally conductive strip (8), and the outer side is in contact with the heat dissipation structure.

8. A cross-linked polyethylene insulated power cable for a humanoid robot according to claim 7, characterized in that: The heat dissipation structure includes a heat dissipation retainer (11) located at the cable connector and a cooling channel (12) located inside the heat dissipation retainer (11). The inner ring surface of the heat dissipation retainer (11) is in contact with the thermally conductive aluminum foil layer (9).

9. A cross-linked polyethylene insulated power cable for a humanoid robot according to claim 8, characterized in that: The cooling channel (12) is a circular channel, and the heat dissipation ring (11) is provided with an inlet (13) and an outlet (14) that are connected to the cooling channel (12).

10. A cross-linked polyethylene insulated power cable for a humanoid robot according to any one of claims 2 to 9, characterized in that: The base material of the sheath (10) and the insulation layer (2) is cross-linked polyethylene.

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