A flexible cable for industrial robots

Abstract

The present invention discloses a flexible cable for industrial robots, and relates to the technical field of cables and wires. A shielding layer is arranged inside an outer sheath, a cable core is arranged inside the shielding layer, a fixed ring is sleeved on the outer sheath, a fastening bolt is arranged on the fixed ring, a nut is embedded in the outer sheath, and the fastening bolt is threadedly connected with the nut, a first rubber hose and a second rubber hose are arranged on both sides of the fixed ring, water is arranged in the first rubber hose, powder made of water-hardening material is arranged in the second rubber hose, the first rubber hose and the second rubber hose are connected through a connecting pipe, an elastic film is arranged at one end of the connecting pipe near the first rubber hose, and a thorn needle is arranged at one end of the connecting pipe near the second rubber hose. The present invention enables the staff to replace the failed protective mechanism on the cable by detachably installing the protective mechanism on the outer sheath, thereby ensuring that the cable can be used and bent normally, and the operation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of cables and wires, and more specifically, to a flexible cable for an industrial robot. Background Art

[0002] Flexible cables are the preferred cables for power transmission materials and signal transmission carriers in drag chain motion systems. During use, cables may be subjected to heavy pressure or fire, which may affect their normal use.

[0003] In the prior art, for example, a Chinese invention patent with the announcement number CN111599521B discloses an impact-resistant ship cable. Under normal conditions, the hydraulic material is in powder form and can be bent, which is convenient for cable laying. When the cable encounters long-term heavy pressure and is repeatedly rubbed, the internal rubber hose A will rupture and water will flow out. The hydraulic material will begin to harden within a few minutes when it encounters water, and become a solid with very high strength to resist the long-term back and forth pressure of heavy objects. Several layers of steel wire mesh are provided in the hydraulic material layer, which can greatly improve the structural strength of the solid. The internal water-blocking yarn will prevent water from further invading the internal cable core. However, the above technical solution has the following defects: Since the hardening process of the hydraulic material reacting with water is usually irreversible, when the reaction is activated, the cable will harden and its shape will be fixed, and it cannot be bent again, which will cause the cable to be unable to be used a second time and its applicability will be poor. Summary of the invention

[0004] In order to overcome the defects of the prior art, the present invention proposes a flexible cable for an industrial robot. By detachably installing a protective mechanism on the outer sheath, a worker can replace a failed protective mechanism on the cable, thereby ensuring that the cable can be used and bent normally and is easy to operate.

[0005] This will not affect the bending deformation of the cable.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The invention provides a flexible cable for an industrial robot, comprising an outer sheath, a shielding layer, a cable core wire and a protective mechanism, wherein the shielding layer is arranged on the inner side of the outer sheath, the cable core wire is arranged on the inner side of the shielding layer, and the protective mechanism is arranged on the outer side of the outer sheath, and the protective mechanism comprises a fixing ring, a fastening bolt, a nut, a first rubber hose, a second rubber hose, a connecting pipe, a piercing needle and an elastic membrane, wherein the fixing ring is sleeved on the outer sheath, the fixing ring is provided with a fastening bolt, the nut is embedded in the outer sheath, and the fastening bolt is threadedly connected with the nut, and the first rubber hose and the second rubber hose are respectively arranged on both sides of the fixing ring, water is arranged in the first rubber hose, and powder made of a water-hardening material is arranged in the second rubber hose, the first rubber hose and the second rubber hose are connected through a connecting pipe, an elastic membrane is arranged at one end of the connecting pipe close to the first rubber hose, and a piercing needle is arranged at one end of the connecting pipe close to the second rubber hose.

[0008] In a preferred technical solution of the present invention, the outer covering layer includes a wear-resistant layer, a flame-retardant layer, a support layer and an insulating layer which are arranged in sequence from the outside to the inside.

[0009] In a preferred technical solution of the present invention, a shaping iron sheet is arranged on the supporting layer.

[0010] In a preferred technical solution of the present invention, more than two supporting steel wires are evenly embedded on the supporting layer, and the supporting steel wires are fixedly connected to the shaping iron sheet.

[0011] In a preferred technical solution of the present invention, the cable core wires include a power cable, a signal cable and a ground wire, and the power cable, the signal cable and the ground wire are arranged in a triangle.

[0012] In a preferred technical solution of the present invention, a buffer layer is filled in the gaps between the power cable, the signal cable and the ground wire.

[0013] In a preferred technical solution of the present invention, a notch is provided on the fixed ring.

[0014] In a preferred technical solution of the present invention, the diameter of the first rubber hose is greater than the diameter of the second rubber hose.

[0015] The beneficial effects of the present invention are:

[0016] The present invention proposes a flexible cable for industrial robots. When the cable is not squeezed by foreign objects, the staff can bend the cable at will. When the cable is squeezed by foreign objects, the foreign objects will first contact the first rubber hose and cause it to be squeezed and deformed, and then squeeze the water in the first rubber hose into the second rubber hose and contact with the powder to make it quickly harden into an annular block. The annular block then plays a major supporting role for the foreign objects, thereby reducing the pressure on the cable, protecting the cable and increasing its service life. Since the hardening process of water and powder is usually irreversible, the cable at this part cannot be bent again. In order not to affect the secondary use of the cable, the staff can remove the protective mechanism at this part and replace it with a new one after removing the foreign objects, so as to ensure that the cable can be reused and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a flexible cable for an industrial robot provided by a specific embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Right view of;

[0019] Figure 3 yes Figure 1 A partial enlarged view of the middle A;

[0020] Figure 4 yes Figure 2 Schematic diagram of the structure of the connecting pipe.

[0021] In the figure:

[0022] 1. Outer layer; 11. Wear-resistant layer; 12. Flame-retardant layer; 13. Support layer; 14. Insulating layer; 15. Shaped iron sheet; 16. Support steel wire; 2. Shielding layer; 3. Cable core wire; 31. Power cable; 32. Signal cable; 33. Ground wire; 34. Buffer layer; 4. Protective mechanism; 41. Fixing ring; 42. Fastening bolt; 43. Nut; 44. First rubber hose; 45. Second rubber hose; 46. Connecting pipe; 47. Needle; 48. Elastic membrane; 49. Notch. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] like Figure 1-4As shown, in the embodiment, a flexible cable for an industrial robot is provided, including an outer sheath 1, a shielding layer 2, a cable core 3 and a protective mechanism 4. The shielding layer 2 is arranged on the inner side of the outer sheath 1, the cable core 3 is arranged on the inner side of the shielding layer 2, and the protective mechanism 4 is arranged on the outer side of the outer sheath 1. The protective mechanism 4 includes a fixing ring 41, a fastening bolt 42, a nut 43, a first rubber hose 44, a second rubber hose 45, a connecting pipe 46, a piercing needle 47 and an elastic membrane 48. The fixing ring 41 is sleeved on the outer sheath 1, and the fixing ring 41 is provided with a fastening bolt. 42, a nut 43 is embedded in the outer sheath 1, and the fastening bolt 42 is threadedly connected to the nut 43, and a first rubber hose 44 and a second rubber hose 45 are respectively arranged on both sides of the fixing ring 41, water is arranged in the first rubber hose 44, and powder made of water-hardening material is arranged in the second rubber hose 45, and the first rubber hose 44 and the second rubber hose 45 are connected through a connecting pipe 46, and an elastic membrane 48 is arranged at one end of the connecting pipe 46 close to the first rubber hose 44, and a needle 47 is arranged at one end of the connecting pipe 46 close to the second rubber hose 45. In this embodiment, the outer sheath 1 is wrapped and arranged on the surface of the cable core 3 to protect the cable core 3 from damage. The shielding layer 2 is preferably a metal wire mesh, which is used to shield external electromagnetic interference and ensure the signal transmission effect. Since the cable is sometimes squeezed during use, the cable core 3 may be deformed, which reduces the service life of the cable. The protective mechanism 4 is provided to protect the cable core 3 when under pressure, wherein more than two fixing rings 41 are provided, the inner side of the fixing ring 41 is arranged close to the outer sheath 1, and is detachably fixed to the outer sheath 1 by means of a fastening bolt 42, so that the staff can choose the number of installations as needed, and the installation and replacement are convenient; the first rubber hose 44 and the second rubber hose 45 are both made of rubber material, which can be deformed when subjected to greater pressure, so that the water in the first rubber hose 44 is squeezed into the second rubber hose 45, and the water-hardening material is After contacting water, it can harden quickly and play a role of compressive support for the cable, thereby protecting the cable. At the same time, since the first rubber hose 44 and the second rubber hose 45 still have a certain elasticity, and water and powder will not affect the deformation ability of the hose, the cable can be bent arbitrarily, which is convenient for the staff to connect. The elastic membrane 48 is used to close the connecting pipe 46, so that when the cable is not under pressure, the water and the hydraulic material are separated. When the cable is under pressure, the water in the first rubber hose 44 can squeeze the elastic membrane 48 to make it expand toward the second rubber hose 45. After expanding to a certain extent, the needle 47 will pierce the elastic membrane 48, thereby opening the connecting pipe 46. In addition, the hydraulic material is preferably quicklime powder or gypsum powder, which can react quickly and form a solid when in contact with water to play a role of compressive support.

[0025] Specifically, the outer sheath 1 includes a wear-resistant layer 11, a flame-retardant layer 12, a support layer 13 and an insulating layer 14 arranged in sequence from the outside to the inside. In this embodiment, the wear-resistant layer 11 has excellent wear resistance and puncture resistance, and is used to protect the cable from wear and scratches to improve the service life of the cable, and the nut 43 is embedded in the wear-resistant layer 11. The support layer 13 can support the wear-resistant layer 11 and protect the cable core 3 from damage. The flame-retardant layer 12 can prevent the cable from catching fire, and the insulating layer 14 can prevent the cable from leaking electricity, which helps to improve the safety performance of the cable.

[0026] Specifically, a shaping iron sheet 15 is disposed on the support layer 13. In this embodiment, the shaping iron sheet 15 is a circular ring structure, and the shaping iron sheet 15 can play a role of auxiliary support and shaping for the support layer 13.

[0027] Specifically, more than two supporting steel wires 16 are evenly embedded on the supporting layer 13, and the supporting steel wires 16 are fixedly connected to the shaping iron sheet 15. In this embodiment, more than two supporting steel wires 16 are evenly arranged around the central axis of the shaping iron sheet 15, which can improve the compressive strength of the supporting layer 13.

[0028] Specifically, the cable core wire 3 includes a power cable 31, a signal cable 32 and a ground wire 33, and the power cable 31, the signal cable 32 and the ground wire 33 are arranged in a triangle. In this embodiment, the power cable 31, the signal cable 32 and the ground wire 33 are all formed by spirally twisting two or more core wires, and the power cable 31 and the signal cable 32 are separately arranged. The electrical signal is transmitted by the power cable 31, and the digital signal and the analog signal are transmitted by the signal cable 32, which helps to avoid interference in signal transmission.

[0029] Specifically, the gaps between the power cable 31, the signal cable 32 and the ground wire 33 are filled with a buffer layer 34. In this embodiment, the buffer layer 34 is preferably silica gel, and the buffer layer 34 can play a role of buffering and protection.

[0030] Specifically, a notch 49 is provided on the fixing ring 41. In this embodiment, the fixing ring 41 is made of a steel material with a certain elasticity. When installing, the notch 49 only needs to be opened and the cable is passed through the notch 49, so that the fixing ring 41 can be conveniently sleeved and installed on the outer sheath 1. At the same time, it is also convenient to replace the protective mechanism 4 when the cable cannot be bent due to excitation.

[0031] Specifically, the diameter of the first rubber hose 44 is greater than the diameter of the second rubber hose 45. In this embodiment, since the diameter of the first rubber hose 44 is larger, when the foreign matter presses the cable, it will first contact the first rubber hose 44, thereby causing the cable to deform.

[0032] Working principle: When the cable is not squeezed by foreign matter, the elastic membrane 48 will not produce a large deformation. At this time, the connecting tube 46 is in an open circuit state, and the staff can bend the cable at will to meet the actual installation needs. When the cable is squeezed by foreign matter, the foreign matter will first contact the first rubber hose 44 and cause it to be squeezed and deformed, and then the first rubber hose 44 will squeeze the elastic membrane 48 to make it contact with the tip of the needle 47, and then pierce the elastic membrane 48 to make the connecting tube 46 in a connected state. At this time, the water in the first rubber hose 44 flows into the second rubber hose 45 through the connecting tube 46 and contacts with the powder to make it quickly harden into an annular hard block, and then the annular hard block plays a major supporting role for the foreign matter, thereby reducing the pressure on the cable, so as to protect the cable and increase its service life. Since the hardening process of water and powder is usually irreversible, the cable at this part cannot be bent again. In order not to affect the secondary use of the cable, the protective mechanism 4 at this part can be removed by the staff after the foreign matter is removed and replaced with a new one to ensure that the cable can be reused and save costs.

[0033] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. A flexible cable for an industrial robot, comprising an outer sheath (1), a shielding layer (2), a cable core (3) and a protective mechanism (4), characterized in that: A shielding layer (2) is arranged inside the outer sheath (1), a cable core (3) is arranged inside the shielding layer (2), a protective mechanism (4) is arranged outside the outer sheath (1), the protective mechanism (4) comprises a fixing ring (41), a fastening bolt (42), a nut (43), a first rubber hose (44), a second rubber hose (45), a connecting pipe (46), a needle (47) and an elastic membrane (48), the fixing ring (41) is sleeved on the outer sheath (1), a fastening bolt (42) is arranged on the fixing ring (41), the nut (43) is embedded in the outer sheath (1), and the fastening bolt (42) is arranged on the fixing ring (41), and the nut (43) is embedded in the outer sheath (1) and fastened. The bolt (42) is threadedly connected to the nut (43); a first rubber hose (44) and a second rubber hose (45) are respectively arranged on both sides of the fixed ring (41); water is arranged in the first rubber hose (44); powder made of a water-hardening material is arranged in the second rubber hose (45); the first rubber hose (44) and the second rubber hose (45) are connected through a connecting pipe (46); an elastic film (48) is arranged at one end of the connecting pipe (46) close to the first rubber hose (44); and a puncture needle (47) is arranged at one end of the connecting pipe (46) close to the second rubber hose (45); The fixing ring (41) is provided with a notch (49); The diameter of the first rubber hose (44) is greater than the diameter of the second rubber hose (45).

2. The flexible cable for an industrial robot according to claim 1, characterized in that: The outer covering layer (1) comprises a wear-resistant layer (11), a flame-retardant layer (12), a supporting layer (13) and an insulating layer (14) which are arranged in sequence from the outside to the inside.

3. A flexible cable for an industrial robot according to claim 2, characterized in that: A shaping iron sheet (15) is arranged on the supporting layer (13).

4. The flexible cable for an industrial robot according to claim 3, characterized in that: More than two supporting steel wires (16) are evenly embedded on the supporting layer (13), and the supporting steel wires (16) are fixedly connected to the shaping iron sheet (15).

5. The flexible cable for an industrial robot according to claim 1, characterized in that: The cable core wire (3) comprises a power cable (31), a signal cable (32) and a ground wire (33), and the power cable (31), the signal cable (32) and the ground wire (33) are arranged in a triangle.

6. The flexible cable for an industrial robot according to claim 5, characterized in that: The gaps between the power cable (31), the signal cable (32) and the ground wire (33) are filled with a buffer layer (34).

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