A pressure-resistant cable for robots

Abstract

The invention relates to the technical field of cables, and provides a compression-resistant cable for a robot, comprising an outer sheath and a plurality of cable cores, wherein the plurality of cable cores are all arranged on the inner side of the outer sheath, and further comprising: a plurality of arc-shaped rubber plates, wherein the plurality of arc-shaped rubber plates are all arranged on the outer side of the outer sheath and are sequentially spaced along the circumference of the outer sheath, wherein two adjacent arc-shaped rubber plates are hinged, an elastic rod is arranged between the two adjacent arc-shaped rubber plates, and a plurality of groups of limiting assemblies are sequentially spaced along the axial direction of the elastic rod, wherein the plurality of groups of limiting assemblies are used to prevent the elastic rod from being separated from between the two adjacent arc-shaped rubber plates, wherein the limiting assemblies comprise two arc-shaped limiting plates, wherein the two arc-shaped limiting plates are respectively arranged on both sides of the elastic rod and are respectively fixedly connected to the corresponding arc-shaped rubber plates, and the two arc-shaped limiting plates are both in close contact with the elastic rod; and a plurality of crushed stones, wherein the plurality of crushed stones are filled between the outer sheath and the plurality of arc-shaped rubber plates, and the surfaces of the crushed stones are not smooth and the edges are uneven.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a pressure-resistant cable for robots. Background Art

[0002] Robots are currently widely used in the industrial field. Industrial robots need to use cables to connect power or transmit command signals. In addition, due to the diversity of the working environment of industrial robots and the fact that cables will undergo multiple movements and bending during the movement of industrial robots, robot cables are required to have good stability.

[0003] Due to the complex and ever-changing working environment, robot cables are often squeezed by pressure, which can easily cause damage or even damage to the cable core, resulting in interruption of the entire cable communication. At present, there are some pressure-resistant cables on the market, but most of these pressure-resistant cables can only buffer and resist forces in specific directions, and the overall pressure-resistant effect is still poor. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a pressure-resistant cable for a robot, which can buffer and resist forces in various directions and has a better pressure-resistant effect.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solution: a pressure-resistant cable for a robot, comprising an outer sheath and a plurality of cable cores, wherein the plurality of cable cores are arranged on the inner side of the outer sheath, and further comprising:

[0006] A plurality of arc-shaped rubber plates, wherein the plurality of arc-shaped rubber plates are arranged on the outside of the outer sheath and are arranged in sequence along the circumference of the outer sheath. Two adjacent arc-shaped rubber plates are hinged. An elastic rod is arranged between the two adjacent arc-shaped rubber plates. A plurality of groups of limiting components are arranged in sequence along the axial direction of the elastic rod. The plurality of groups of limiting components are used to prevent the elastic rod from being separated from between the two adjacent arc-shaped rubber plates. The limiting components include two arc-shaped limiting plates, which are respectively arranged on both sides of the elastic rod and are respectively fixedly connected to the corresponding arc-shaped rubber plates. The two arc-shaped limiting plates are in close contact with the elastic rod.

[0007] A plurality of crushed stones are filled between the outer sheath and the plurality of arc-shaped rubber plates, and the surfaces of the crushed stones are not smooth and the edges are uneven.

[0008] Furthermore, the gravel pieces are of irregular shape.

[0009] Furthermore, it also includes a central fiber column, which is arranged on the inner side of the outer sheath, and the axis of the central fiber column is colinear with the axis of the outer sheath;

[0010] A plurality of groups of pressure transmission components are sequentially arranged at intervals along the axial direction of the central fiber column, and the pressure transmission components include a plurality of transmission rods, which are sequentially arranged at intervals along the circumference of the central fiber column and are all fixedly connected to the central fiber column, and the plurality of transmission rods divide the space between the outer sheath and the central fiber column into a plurality of accommodating cavities, and the cable core is arranged in the accommodating cavities;

[0011] A limiting hole adapted to the transmission rod is opened on the inner wall of the outer sheath, and the bottom of the limiting hole contacts the transmission rod.

[0012] Furthermore, the outer ends of two adjacent transmission rods are fixedly connected by a connecting rope, and a connecting groove adapted to the connecting rope is formed inside the outer sheath.

[0013] Furthermore, a plurality of accommodating grooves are formed inside the outer sheath and are arranged in sequence along the circumferential direction and extend along the axial direction. The accommodating grooves correspond to the transfer rods one by one. Flexible cutting blades are arranged in the accommodating grooves and are fixedly connected to the transfer rods.

[0014] Furthermore, an angle is formed between two adjacent transfer rods, and the center point of the cable core is located on the bisector of the angle.

[0015] Furthermore, arc-shaped grooves adapted to the elastic rods are formed on both sides of each of the arc-shaped rubber plates.

[0016] Furthermore, the friction coefficient of the surface of the crushed stone is 0.4-0.6.

[0017] Beneficial effects of the present invention: The present invention provides a pressure-resistant cable for a robot. On the one hand, a plurality of arc-shaped rubber plates are arranged on the outside of an outer sheath, and two adjacent arc-shaped rubber plates are hinged. Therefore, the present invention can disperse the pressure on the cable through the plurality of arc-shaped rubber plates, and the design of the plurality of arc-shaped rubber plates can buffer and resist pressure in all directions; on the other hand, the plurality of crushed stones can further disperse the pressure on the arc-shaped rubber plates, and the plurality of crushed stones squeeze and rub against each other, resulting in a better pressure-resistant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 3 Schematic diagram of the force analysis structure of the transfer rod and the cable core.

[0021] Figure numerals: 10-outer sheath, 11-PP filling rope, 12-limiting hole, 13-connecting groove, 14-accommodating groove, 20-cable core, 30-arc rubber plate, 31-gravel, 32-elastic rod, 33-arc groove, 40-limiting assembly, 41-arc limiting plate, 50-central fiber column, 60-pressure transmission assembly, 61-transmission rod, 62-connecting rope, 70-flexible cutting blade. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0026] like Figure 1-Figure 3 As shown, the present invention provides a compression-resistant cable for a robot, comprising an outer sheath 10 and a plurality of cable cores 20, wherein the plurality of cable cores 20 are arranged on the inner side of the outer sheath 10, and the outer sheath 10 and the plurality of cable cores 20 are filled with PP filling ropes 11, and the above contents are all prior art, and the specific structure is not repeated here. The present invention also includes a plurality of arc-shaped rubber plates 30 and a plurality of crushed stone blocks 31.

[0027] A plurality of arc-shaped rubber plates 30 are arranged on the outside of the outer sheath 10 and are arranged at equal intervals in sequence along the circumference of the outer sheath 10. Two adjacent arc-shaped rubber plates 30 are hinged to each other. Specifically, the two sides of each arc-shaped rubber plate 30 are hinged to the corresponding side of the two adjacent arc-shaped rubber plates 30. An elastic rod 32 is arranged between the two adjacent arc-shaped rubber plates 30. A plurality of groups of limit assemblies 40 are arranged at equal intervals in sequence along the axial direction of the elastic rod 32. The plurality of groups of limit assemblies 40 are used to prevent the elastic rod 32 from detaching from between the two adjacent arc-shaped rubber plates 30. The limit assemblies 40 include two arc-shaped limit plates 41. The two arc-shaped limit plates 41 are respectively arranged on both sides of the elastic rod 32 and are respectively fixedly connected to the corresponding arc-shaped rubber plates 30. The two arc-shaped limit plates 41 are both in close contact with the elastic rod 32.

[0028] A plurality of crushed stones 31 are filled between the outer sheath 10 and the plurality of arc-shaped rubber plates 30 , and the surface of the crushed stones 31 is not smooth and the edges are jagged.

[0029] The present invention can achieve the following technical effects:

[0030] First, the plurality of arc-shaped rubber plates 30 are disposed on the outside of the outer sheath 10 and are arranged at equal intervals along the circumference of the outer sheath 10. Two adjacent arc-shaped rubber plates 30 are hinged to each other. Through this segmented design, the plurality of arc-shaped rubber plates 30 can disperse the pressure on the cable and reduce the impact on other cable cores 20. In addition, the design of the plurality of arc-shaped rubber plates 30 can buffer and resist pressure in all directions.

[0031] Secondly, the volume of the crushed stone 31 is relatively small, and the volume of the crushed stone 31 is preferably 0.001-0.008 cubic centimeters. When the arc-shaped rubber sheet 30 is squeezed by pressure, the multiple crushed stone 31 can further disperse the pressure on the arc-shaped rubber sheet 30 and transmit it downward, and the multiple crushed stone 31 squeeze and rub against each other to consume the energy brought by the pressure. At the same time, the multiple crushed stone 31 gradually disperses and transmits the energy downward to the ground, further improving the anti-pressure effect of the present invention.

[0032] It is worth noting that: 1. The elastic rod 32 can exert a force on the arc-shaped rubber plate 30 through the arc-shaped limit plate 41, so that the multiple arc-shaped rubber plates 30 always remain round, ensuring the roundness of the cable. 2. The arc-shaped rubber plate 30 is made of rubber material, so it has good flexibility and will not affect the normal bending and use of the cable. 3. The multiple groups of limit assemblies 40 are arranged at equal intervals along the axial direction of the elastic rod 32, and are not continuous. Therefore, the length of the arc-shaped limit plate 41 is not very long, which will not affect the normal bending and use of the cable.

[0033] In one embodiment, the crushed stone pieces 31 are irregularly shaped.

[0034] The irregularly shaped gravel pieces 31 can achieve the following technical effects: 1. When squeezed by pressure, these irregularly shaped gravel pieces 31 will be stuck to each other and remain in place after being displaced downward for a certain distance, and cannot move further. Therefore, while ensuring the ability to disperse pressure, the overall stability of the cable can also be ensured. 2. After the irregularly shaped gravel pieces 31 are stuck to each other, there will be gaps in the middle. When rainwater seeps in between two adjacent curved rubber plates 30, these gaps can allow the rainwater to flow downward quickly and flow out from between the two adjacent curved rubber plates 30 below, making the present invention suitable for rainy environments.

[0035] In one embodiment, a central fiber column 50 is further included. The central fiber column 50 is disposed inside the outer sheath 10 , and the axis of the central fiber column 50 is colinear with the axis of the outer sheath 10 .

[0036] Multiple groups of pressure transmission components 60 are arranged at equal intervals in the axial direction of the central fiber column 50. The pressure transmission component 60 includes multiple transmission rods 61, which are arranged at equal intervals in the circumferential direction of the central fiber column 50 and are fixedly connected to the central fiber column 50. The multiple transmission rods 61 divide the space between the outer sheath 10 and the central fiber column 50 into multiple accommodating chambers. A cable core 20 is arranged in each accommodating chamber, and an angle is formed between two adjacent transmission rods 61. The center point of the cable core 20 is located on the bisector of the angle, so that when the cable core 20 contacts the transmission rod 61, it will be pushed outward.

[0037] A limiting hole 12 adapted to the transmission rod 61 is formed on the inner wall of the outer sheath 10 , and the bottom of the limiting hole 12 contacts the transmission rod 61 .

[0038] It is worth noting that the multiple groups of pressure transmission components 60 are arranged in sequence at equal intervals along the axial direction of the central fiber column 50 and are not continuous, so the existence of the transmission rod 61 will not affect the normal bending use of the cable.

[0039] The central fiber column 50 is made of tensile fiber material. On the one hand, the central fiber column 50 serves as a torsion release center. When the cable is subjected to external torsion stress, the torsion stress is borne by the central fiber column 50 in the middle, rather than by the cable core 20. This structure can ensure that the cable core 20 will not break when the cable is subjected to external torsion stress, thereby improving the torsion resistance of the cable. On the other hand, when the cable is subjected to pressure, in addition to a part of the pressure being gradually dispersed and transmitted downward by multiple gravel blocks 31, another part of the pressure is also dispersed and transmitted from the transfer rod 61 above the central fiber column 50 through the central fiber column 50 to the transfer rod 61 below the central fiber column 50. The two ways of dispersing pressure cooperate to further improve the pressure resistance of the cable, and the formed accommodation cavity can also protect the cable core 20.

[0040] In one embodiment, the outer ends of two adjacent transmission rods 61 are fixedly connected by a connecting rope 62 , and a connecting groove 13 adapted to the connecting rope 62 is formed inside the outer sheath 10 .

[0041] When the cable is subjected to a large pressure, the pressure will change the shape of the outer sheath 10, and the outer sheath 10 will gradually become an elliptical shape. At this time, some positions of the outer sheath 10 will be continuously stretched and damaged.

[0042] The present invention fixes the outer ends of two adjacent transfer rods 61 with a connecting rope 62, so that when certain positions of the outer sheath 10 are continuously stretched, the connecting rope 62 at the corresponding position will also be stretched synchronously. When the connecting rope 62 is tightened, a triangular structure will be formed between the connecting rope 62 and the corresponding two transfer rods 61. The high stability of the triangle is utilized to prevent the outer sheath 10 from being further stretched, thereby further improving the protection effect on the cable core 20.

[0043] In one embodiment, a plurality of receiving grooves 14 are formed inside the outer sheath 10, which are arranged at equal intervals in the circumferential direction and extend in the axial direction, and the receiving grooves 14 correspond to the transmission rods 61 one by one. A flexible cutting blade 70 is arranged in the receiving groove 14, and the flexible cutting blade 70 is fixedly connected to the outer end surface of the transmission rod 61.

[0044] When the cable is subjected to destructive pressure (i.e., extremely large pressure, so that the triangular structure formed between the connecting rope 62 and the corresponding two transfer rods 61 will also be violently crushed), part of the transfer rod 61 will move outward until the flexible cutting blade 70 contacts the bottom of the accommodating groove 14 and cuts the outer sheath 10. At this time, the connecting rope 62 is also pulled apart due to the destructive pressure. After the outer sheath 10 is cut open, the corresponding cable core 20 will be mixed with the multiple gravel blocks 31. In this way, the cable core 20 will be hidden in the multiple gravel blocks 31. The multiple gravel blocks 31 disperse the pressure and protect the cable core 20.

[0045] It is worth noting that: 1. The flexible cutting blade 70 is flexible and can bend with the cable, so it will not affect the normal bending and use of the cable. 2. Only when the cable encounters destructive pressure will the flexible cutting blade 70 contact the bottom of the receiving groove 14 and cut the outer sheath 10. This situation will not occur under normal pressure conditions, because under normal pressure conditions, the bottom of the limiting hole 12 is always in contact with the transfer rod 61, so the flexible cutting blade 70 can never contact the bottom of the receiving groove 14, and it is also impossible to cut the outer sheath 10. 3. This structural design cannot protect all cable cores 20. When encountering destructive pressure, some cable cores 20 will still be damaged. It is just that in this case, as many cable cores 20 as possible are protected to reduce losses.

[0046] In one embodiment, an angle is formed between two adjacent transfer rods 61 , and the center point of the cable core 20 is located on the bisector of the angle.

[0047] In this way, when the cable is subjected to destructive pressure, some of the adjacent transfer rods 61 will move closer to each other, and the PP filling rope 11 will transmit the force. Since the center point of the cable core 20 is located on the bisector of the angle, according to the force analysis, the cable core 20 will be pushed outward, so that after the flexible cutting blade 70 cuts the outer sheath 10, the cable core 20 can be quickly pushed outward and mixed with multiple gravel blocks 31, thereby further improving the protection effect of the cable core 20.

[0048] In one embodiment, arc-shaped grooves 33 adapted to the elastic rod 32 are formed on both sides of each arc-shaped rubber plate 30 , so as to better limit the elastic rod 32 .

[0049] In one embodiment, the friction coefficient of the surface of the crushed stone 31 is 0.4-0.6.

[0050] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A compression-resistant cable for a robot, comprising an outer sheath and a plurality of cable cores, wherein the plurality of cable cores are arranged on the inner side of the outer sheath, characterized in that: Also includes: A plurality of arc-shaped rubber plates, wherein the plurality of arc-shaped rubber plates are arranged on the outside of the outer sheath and are arranged in sequence along the circumference of the outer sheath. Two adjacent arc-shaped rubber plates are hinged. An elastic rod is arranged between the two adjacent arc-shaped rubber plates. A plurality of groups of limiting components are arranged in sequence along the axial direction of the elastic rod. The plurality of groups of limiting components are used to prevent the elastic rod from being separated from between the two adjacent arc-shaped rubber plates. The limiting components include two arc-shaped limiting plates, which are respectively arranged on both sides of the elastic rod and are respectively fixedly connected to the corresponding arc-shaped rubber plates. The two arc-shaped limiting plates are in close contact with the elastic rod. A plurality of crushed stones are filled between the outer sheath and the plurality of arc-shaped rubber plates, and the surfaces of the crushed stones are not smooth and the edges are uneven.

2. A pressure-resistant cable for a robot according to claim 1, characterized in that: The crushed stone pieces are of irregular shape.

3. The compression-resistant cable for a robot according to claim 1, characterized in that: It also includes a central fiber column, which is arranged on the inner side of the outer sheath, and the axis of the central fiber column is colinear with the axis of the outer sheath; A plurality of groups of pressure transmission components are sequentially arranged at intervals along the axial direction of the central fiber column, and the pressure transmission components include a plurality of transmission rods, which are sequentially arranged at intervals along the circumference of the central fiber column and are all fixedly connected to the central fiber column, and the plurality of transmission rods divide the space between the outer sheath and the central fiber column into a plurality of accommodating cavities, and the cable core is arranged in the accommodating cavities; A limiting hole adapted to the transmission rod is opened on the inner wall of the outer sheath, and the bottom of the limiting hole contacts the transmission rod.

4. A pressure-resistant cable for a robot according to claim 3, characterized in that: The outer ends of two adjacent transmission rods are fixedly connected by a connecting rope, and a connecting groove adapted to the connecting rope is formed inside the outer sheath.

5. A pressure-resistant cable for a robot according to claim 4, characterized in that: A plurality of accommodating grooves are formed inside the outer sheath and are arranged in sequence along the circumferential direction and extend along the axial direction. The accommodating grooves correspond to the transfer rods one by one. Flexible cutting blades are arranged in the accommodating grooves and are fixedly connected to the transfer rods.

6. A pressure-resistant cable for a robot according to claim 5, characterized in that: An angle is formed between two adjacent transfer rods, and the center point of the cable core is located on the bisector of the angle.

7. The pressure-resistant cable for a robot according to claim 1, characterized in that: Both sides of each arc-shaped rubber plate are formed with arc-shaped grooves adapted to the elastic rods.

8. The pressure-resistant cable for a robot according to claim 2, characterized in that: The friction coefficient of the surface of the crushed stone is 0.4-0.6.

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