A bidirectional unlimited-limit adjustable overhead cable tensioning device and method thereof

Abstract

The present invention discloses a bidirectional, unlimited-adjustable overhead cable tensioning device and method, belonging to the field of cable tensioning technology. The device comprises an overhead chassis, a tensioning disc being rotatably mounted on the upper surface of the overhead chassis; a locking disc located inside the tensioning disc being fixedly mounted on the upper surface of the overhead chassis via a lifting seat, the locking disc being capable of cooperating to complete one-way locking of the inner side and the outer side thereof; a first tensioning mechanism located inside the locking disc and a second tensioning mechanism located outside the locking disc are mounted on the overhead chassis. The present invention is used for tensioning wires, cables, and other cables, and employs a first tensioning mechanism and a second tensioning mechanism to sequentially tension the cables in both directions. The first tensioning mechanism is used to adjust the radius of the cable before rotational tensioning, and the second tensioning mechanism is used to perform rotational tensioning. The device has no upper limit on the maximum tensioning length of the cable, and the cable is automatically locked after tensioning. The device has high stability and reliability after tensioning.

Description

Technical Field

[0001] The present invention relates to the technical field of cable tensioning, and in particular to a bidirectional unlimited-upper-limit adjustable overhead cable tensioning device and a method thereof. Background Art

[0002] Wires and cables are essential components for power transmission in electrified equipment and other applications. Cable tensioning, during the laying or installation process, involves using specific equipment and techniques to maintain appropriate cable tension, preventing the cable from loosening or sagging due to its own weight or other external forces. This is crucial for ensuring safe operation and long-term stability.

[0003] Among the existing patent documents, there is a patent with publication number CN 205911711 U, entitled "A device for facilitating wire tensioning", and a patent with publication number CN 208508388 U, entitled "A device for tensioning wires for overhead power lines". In actual application, the above devices for tensioning cables have a certain maximum length to which the cables can be tensioned, that is, there is an upper limit to the length of the cables that can be tensioned by the devices. However, for aerial lines that are spaced far apart, since the cables are too long, the length that can be tensioned at a single time is also large. Such devices for tensioning cables cannot meet the above requirements, resulting in relatively poor versatility. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a bidirectional unlimited-adjustable overhead cable tensioning device and method thereof. The device adopts a first tensioning mechanism and a second tensioning mechanism to tension the cable in both directions in sequence. The radius of the cable before being rotated and tightened is first adjusted by the first tensioning mechanism, and then the cable is rotated and tightened by the second tensioning mechanism. There is no upper limit on the maximum tensioning length of the cable, and it is automatically locked after tensioning. The stability and reliability after tensioning are high, and its versatility in practical applications will be better.

[0005] In order to solve the above technical problems, the technical solution of the present invention is achieved as follows:

[0006] A bidirectional, unlimited-limit adjustable overhead cable tensioning device comprises an overhead chassis, a tensioning disc rotatably mounted on the upper surface of the overhead chassis via an annular slideway, two mutually parallel and perpendicular cable tie rods fixed at the center of the tensioning disc, a cable winding cap rotatably mounted on the cable tie rods, wherein the cable is passed between the cable winding caps of the two cable tie rods;

[0007] The upper surface of the overhead chassis is fixedly mounted with a locking disc located inside the tension disc through a lifting seat. The locking disc can cooperate to complete the one-way locking of the inner side and the one-way locking of the outer side respectively.

[0008] A first tensioning mechanism located on the inner side of the locking disc and a second tensioning mechanism located on the outer side of the locking disc are installed on the overhead chassis, wherein the first tensioning mechanism and the second tensioning mechanism perform tensioning work in sequence;

[0009] The first tensioning mechanism includes a motor 1 fixedly mounted on the lower surface of the overhead chassis, a gear 1 being concentrically fixed to the rotating shaft of the motor 1 through an integrated component integrating coaxial transmission, transmission switching, and one-way self-locking, and two parallel racks being meshed with each other on the gear 1; the racks being plugged and fixed to a tensioning rod which is parallel to the cable tie rod and slides in a slide groove 1, and a winding cap being rotatably mounted on the tensioning rod, wherein the cable is gradually linearly tightened after passing around the winding cap on the tensioning rod;

[0010] The second tensioning mechanism includes a second motor fixedly mounted on the lower surface of the overhead chassis, a second gear is concentrically fixed to the rotating shaft of the second motor through a coupling, a toothed disc is fixed on the outer side of the tensioning disc and is located on the same plane as the second gear, and the toothed disc and the second gear are engaged and transmitted by a gear chain; when the tensioning disc is driven to rotate, the cable can be rotated and tightened.

[0011] Adopting the above scheme, the device uses the first tensioning mechanism and the second tensioning mechanism to tighten the cable in both directions in sequence. The radius of the cable before being rotated and tightened is first adjusted by the first tensioning mechanism, and then the second tensioning mechanism is used to rotate and tighten. There is no upper limit on the maximum tensioning length of the cable, and it is automatically locked after tightening. The stability and reliability after tightening are high, and its versatility in practical applications will be better.

[0012] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, a screw rod is installed through the top of the two cable tie rods, and the end of the screw rod is equipped with a nut that fixes the screw rod to the top of the cable tie rod. At this time, the cable is located under the screw rod.

[0013] With the above solution, in order to ensure the stability of the cable before tensioning, a screw rod is used to press the center of the cable before tensioning, so that the cable will not fall off during the subsequent tensioning process.

[0014] As a preferred embodiment of a bidirectional unlimited-upper-limit adjustable overhead cable tensioning device, a base is fixed to the bottom edge of the winding cap, and both the winding cap and the base are made of insulating rubber material.

[0015] In order to avoid direct contact between the cable and the tensioning disk, a bottom support is provided at the bottom of the winding cap to isolate the cable from components such as the tensioning disk, thereby ensuring safety during tensioning.

[0016] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, L-shaped auxiliary slide bars are respectively inserted and fixed on both sides of the tensioning rod, and the L-shaped auxiliary slide bar is slidably installed in a second slide groove parallel to the first slide groove.

[0017] In order to further improve the stability of the take-up rod during sliding, an L-shaped auxiliary sliding rod is installed to guide the sliding of the take-up rod, thereby improving the stability of the take-up rod during sliding.

[0018] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, the integrated component includes an integrated shell concentrically fixedly mounted on a lower surface of the gear, a transmission shaft is installed in the integrated shell in a limiting manner from the inside to the outside, and at least one group of limiting ribs are fixed along the axial side of the transmission shaft; below the limiting ribs, there is a transmission sleeve concentrically fixed on a rotating shaft of the motor, and the upper surface of the transmission sleeve is provided with a docking interface for use with the transmission shaft and the limiting ribs.

[0019] By adopting the above solution, in order to realize the coaxial transmission of the integrated component, when the integrated housing is engaged in the docking port through the transmission shaft and the limiting ribs, the motor 1 can realize the coaxial transmission of the gear 1.

[0020] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, the top of the transmission shaft is fixed on a guide plate 1, the guide plate 1 is slidably installed on two guide shafts 1 fixed in an integrated shell, and the guide shaft 1 is equipped with a spring 1 that pushes the guide plate 1 downward; an iron block is fixed above the guide plate 1, and an electromagnet is fixed inside the integrated shell and is located directly above the iron block, and the electromagnet consists of an iron core and a coil.

[0021] By adopting the above scheme, in order to realize the transmission switching of the integrated component, when the coil is energized, the electromagnet can absorb the iron block to overcome the elastic force of spring one and move upward. At this time, the transmission shaft and the limit rib are separated from the docking interface, thereby realizing the transmission switching between motor one and motor two.

[0022] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, at least two self-locking components are installed on the side wall of the integrated shell and are used in conjunction with the inner side of the locking disc; the self-locking component includes an L-shaped self-locking probe that passes through the side wall of the integrated shell, and the L-shaped self-locking probe is slidably installed on a guide shaft 2 fixed on the side wall of the integrated shell, and the guide shaft 2 is sleeved with a spring 2 that pushes the L-shaped self-locking probe 1 to move toward the ratchet on the inner side of the locking disc.

[0023] By adopting the above solution, in order to achieve one-way self-locking of the integrated component, the L-shaped self-locking probe 1 always extends between two adjacent ratchets on the inner side of the locking disc under the elastic action of the spring 2, so that the integrated component cannot rotate reversely after rotation.

[0024] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, at least two self-locking components 2 are installed on the side wall of the tensioning disk and are used in conjunction with the outer side of the locking disk; the self-locking component 2 includes an L-shaped self-locking probe 2 that passes through the side wall of the tensioning disk, and the L-shaped self-locking probe 2 is slidably installed on a guide shaft 3 fixed on the side wall of the tensioning disk, and the guide shaft 3 is sleeved with a spring 3 that pushes the L-shaped self-locking probe 2 to move toward the ratchet on the outer side of the locking disk; under the elastic action of the spring 3, the L-shaped self-locking probe 2 always extends between two adjacent ratchets on the outer side of the locking disk, so that the tensioning disk cannot rotate reversely after rotation.

[0025] By adopting the above solution, in order to achieve one-way self-locking of the tension disk, the L-shaped self-locking probe 2 always extends between two adjacent ratchets on the outside of the locking disk under the elastic action of the spring 3, so that the tension disk cannot rotate reversely after rotation.

[0026] As a preferred embodiment of a bidirectional unlimited-limit adjustable overhead cable tensioning device, the diameter of gear 2 is smaller than the diameter of the toothed disc.

[0027] By adopting the above scheme, in order to reduce the driving load of motor 2, the diameter of gear 2 is designed to be smaller and the diameter of the toothed disc is designed to be larger. When the two are transmitted, motor 2 will be more "labor-saving", thereby reducing the driving load of motor 2.

[0028] A bidirectional unlimited-upper-limit adjustable overhead cable tensioning method is implemented using the bidirectional unlimited-upper-limit adjustable overhead cable tensioning device, and the implementation steps are as follows:

[0029] S1. Pass the cable to be overhead between the winding caps of the two cable tie rods, then insert the screw rod through the top of the two cable tie rods. At this time, the screw rod and nut cooperate to seal the cable between the two cable tie rods, and then wind the cable around the winding cap on the tensioning rod;

[0030] S2. First, adjust the radius of the cable before it is rotated and tightened through the first tensioning mechanism; start the motor 1, and drive the gear 1 to rotate through the integrated component. At this time, the two tensioning rods gradually move away from the position where the cable tie rod is located. At this time, the cable is continuously linearly tensioned under the tension of the two tensioning rods. After the two tensioning rods are moved, they cannot move back under the joint locking of the self-locking component 1 and the locking disc to ensure the reliability after tensioning; if the cable reaches a fully tensioned state during this process, the cable tensioning work is completed; if the cable is still in a loose state during this process, the cable tensioning work continues;

[0031] S3: The cable tensioning operation continues. After the radius of the cable before rotation and tensioning is adjusted to the maximum by the first tensioning mechanism, the cable is further rotated and tensioned by the second tensioning mechanism. The coil is first energized. At this time, the electromagnet can attract the iron block and overcome the elastic force of the spring 1 and move upward. At this time, the transmission shaft and the limit rib are separated from the docking interface, thereby realizing the transmission switching between motor 1 and motor 2.

[0032] S4. Start motor 2, which drives gear 2 to rotate through the coupling, drives the toothed disc to rotate under the transmission of the toothed chain, and finally drives the tensioning disc to rotate. After the tensioning disc is rotated, it cannot be reversed due to the joint locking of self-locking component 2 and the locking disc to ensure the reliability after tensioning. The cable tensioning work is completed until the cable is fully tensioned.

[0033] After adopting the above technical solution, the beneficial effects of the present invention are:

[0034] 1. The device uses a first tensioning mechanism and a second tensioning mechanism to tension the cable in both directions. The first tensioning mechanism is used to adjust the radius of the cable before rotation and tensioning, and then the second tensioning mechanism is used to perform rotation and tensioning. There is no upper limit on the maximum tensioning length of the cable, and it automatically locks after tensioning. The device has high stability and reliability after tensioning, and its versatility in practical applications will be better.

[0035] 2. In order to ensure the stability of the cable before tensioning, a screw rod is used to press the center of the cable before tensioning, so that the cable will not fall off during the subsequent tensioning process;

[0036] 3. In order to avoid direct contact between the cable and the tensioning disk, a bottom support is provided at the bottom of the winding cap to isolate the cable from the tensioning disk and other components, thereby ensuring safety during tensioning;

[0037] 4. In order to further improve the stability of the tension rod during sliding, an L-shaped auxiliary sliding rod is installed to guide the sliding of the tension rod, thereby improving the stability of the tension rod during sliding;

[0038] 5. To achieve coaxial transmission of the integrated component, when the integrated housing is engaged with the docking port via the transmission shaft and the limiting rib, motor one can achieve coaxial transmission of gear one. To achieve transmission switching of the integrated component, when the coil is energized, the electromagnet can attract the iron block and overcome the elastic force of spring one and then move upward. At this time, the transmission shaft and the limiting rib are separated from the docking port, thereby achieving transmission switching between motor one and motor two. To achieve one-way self-locking of the integrated component, the L-shaped self-locking probe one is always extended between two adjacent ratchet teeth on the inner side of the locking disc under the elastic action of spring two, so that the integrated component cannot rotate reversely after rotation.

[0039] 6. In order to achieve one-way self-locking of the tension disc, the L-shaped self-locking probe 2 is always extended between two adjacent ratchet teeth on the outer side of the locking disc under the elastic action of the spring 3, so that the tension disc cannot rotate reversely after rotating;

[0040] 7. In order to reduce the driving load of motor 2, the diameter of gear 2 is designed to be smaller and the diameter of the toothed disc is designed to be larger. When the two are transmitting, motor 2 will be more "labor-saving", thereby reducing the driving load of motor 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a three-dimensional structural diagram of the present invention when the radius of the cable before being rotated and tightened is adjusted by the first tightening mechanism;

[0043] Figure 2 This is a three-dimensional structural diagram of the present invention when rotating and tightening by the second tightening mechanism;

[0044] Figure 3 To display along the vertical cable length Figure 1 A three-dimensional structural diagram of the internal structure;

[0045] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0046] Figure 5 To show the length of the parallel cable Figure 1 A three-dimensional structural diagram of the internal structure;

[0047] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0048] Figure 7 To display along the vertical cable length Figure 2 A three-dimensional structural diagram of the internal structure;

[0049] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0050] Figure 9 To show the length of the parallel cable Figure 2 A three-dimensional structural diagram of the internal structure;

[0051] Figure 10 for Figure 9 A partial enlarged view of point D in the middle;

[0052] Figure 11 for Figure 1 A three-dimensional structural diagram of the middle tension plate and its internal components;

[0053] Figure 12 To hide Figure 11 The three-dimensional structure behind the middle tension plate;

[0054] Figure 13 for Figure 12 3D structural diagram of the integrated components;

[0055] Figure 14 for Figure 13 The three-dimensional structure diagram of the integrated shell;

[0056] Figure 15 for Figure 13 The three-dimensional structure diagram of the middle transmission sleeve;

[0057] Figure 16 For horizontal display Figure 14 A three-dimensional structural diagram of the internal structure;

[0058] Figure 17 For vertical display Figure 14 A three-dimensional structural diagram of the internal structure;

[0059] Figure 18 for Figure 5 A partial enlarged view of point E in the middle;

[0060] Markings in the figure: 1-empty chassis; 2-annular slide; 3-tension disk; 4-cable rod; 5-winding cap; 6-lifting seat; 7-locking disk; 8-motor 1; 9-gear 1; 10-rack; 11-slide 1; 12-tension rod; 13-motor 2; 14-coupling; 15-gear 2; 16-toothed disc; 17-tooth chain; 18-screw; 19-nut; 20-base support; 21-L-shaped auxiliary Slide rod; 22-slide groove 2; 23-integrated housing; 24-drive shaft; 25-limiting rib; 26-drive sleeve; 27-docking port; 28-guide plate 1; 29-guide shaft 1; 30-spring 1; 31-iron block; 32-electromagnet; 33-L-shaped self-locking probe 1; 34-guide shaft 2; 35-spring 2; 36-L-shaped self-locking probe 2; 37-guide shaft 3; 38-spring 3; 39-cable. DETAILED DESCRIPTION

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0062] like Figures 1 to 13 As shown, a bidirectional unlimited-limit adjustable overhead cable tensioning device is used to tighten wires, cables, and the like, and includes an overhead chassis 1. A tensioning disc 3 is rotatably mounted on the upper surface of the overhead chassis 1 via an annular slide 2. Two mutually parallel and mutually perpendicular tie rods 4 are fixed at the center of the tie rods 3. Winding caps 5 are rotatably mounted on the tie rods 4. A cable 39 is passed between the winding caps 5 of the two tie rods 4.

[0063] The upper surface of the overhead chassis 1 is fixedly mounted with a locking disc 7 located inside the tension disc 3 via a lifting seat 6. The locking disc 7 can cooperate to complete the one-way locking of the inner side and the one-way locking of the outer side respectively.

[0064] The overhead chassis 1 is equipped with a first tensioning mechanism located inside the locking disc 7 and a second tensioning mechanism located outside the locking disc 7, wherein the first tensioning mechanism and the second tensioning mechanism perform tensioning work in sequence;

[0065] The first tensioning mechanism includes a motor 8 fixedly mounted on the lower surface of the overhead chassis 1. A gear 9 is concentrically fixed to the rotating shaft of the motor 8 via an integrated component integrating coaxial transmission, transmission switching, and one-way self-locking. Two parallel racks 10 are engaged with the gear 9. The rack 10 is plugged and fixed to a tensioning rod 12 that is parallel to the cable tie rod 4 and slides in a slide groove 11. A winding cap 5 is rotatably mounted on the tensioning rod 12. The cable 39 is gradually linearly tightened after passing around the winding cap 5 on the tensioning rod 12.

[0066] The second tensioning mechanism includes a second motor 13 fixedly mounted on the lower surface of the overhead chassis 1. A second gear 15 is concentrically fixed to the rotating shaft of the second motor 13 via a coupling 14. A toothed disc 16 is fixed to the outside of the tensioning disc 3 and is located on the same plane as the second gear 15. The toothed disc 16 and the second gear 15 are engaged with each other via a toothed chain 17. When the tensioning disc 3 is driven to rotate, it can rotate and tighten the cable 39.

[0067] The device adopts a first tensioning mechanism and a second tensioning mechanism to perform bidirectional tensioning of the cable 39 in sequence. The radius of the cable 39 before being rotated and tightened is first adjusted by the first tensioning mechanism, and then the cable 39 is rotated and tightened by the second tensioning mechanism. There is no upper limit on the maximum tensioning length of the cable 39, and it is automatically locked after tensioning. It has high stability and reliability after tensioning, and its versatility in practical applications will be better.

[0068] like Figure 11 As shown, the top ends of the two cable tie rods 4 are fitted with screw rods 18, and the ends of the screw rods 18 are fitted with nuts 19 that fasten the screw rods 18 to the top ends of the cable tie rods 4. At this time, the cables 39 are located under the screw rods 18. In order to ensure the stability of the cables 39 before tensioning, the screw rods 18 are used to press the center of the cables 39 before tensioning, so that the cables 39 will not fall off during the subsequent tensioning process.

[0069] like Figure 11 As shown, a base 20 is fixed to the bottom edge of the winding cap 5. Both the winding cap 5 and the base 20 are made of insulating rubber. To prevent direct contact between the cable 39 and the tensioning disc 3, the base 20 is provided at the bottom of the winding cap 5. This isolates the cable 39 from the tensioning disc 3 and other components, thereby ensuring safety during tensioning.

[0070] like Figures 11 to 12 As shown, L-shaped auxiliary slide bars 21 are respectively inserted and fixed on both sides of the tension rod 12. The L-shaped auxiliary slide bars 21 are slidably installed in the second slide groove 22 which is parallel to the first slide groove 11. In order to further improve the stability of the tension rod 12 during sliding, the L-shaped auxiliary slide bars 21 are installed to guide the sliding of the tension rod 12, thereby improving the stability of the tension rod 12 during sliding.

[0071] like Figures 14 and 15 As shown, the integrated assembly includes an integrated housing 23 concentrically fixed to the lower surface of gear 1-9. A drive shaft 24 is fixedly mounted from the inside outwardly through integrated housing 23. Two sets of symmetrical limiting ribs 25 are fixed to the sides of the drive shaft 24 along its axial direction. Below the limiting ribs 25, a drive sleeve 26 is coaxially fixed to the rotating shaft of motor 1-8. The upper surface of the drive sleeve 26 is provided with a docking port 27 for mating with the drive shaft 24 and the limiting ribs 25. To achieve coaxial transmission of the integrated assembly, when the integrated housing 23, via the drive shaft 24 and the limiting ribs 25, is engaged within the docking port 27, motor 1-8 can achieve coaxial transmission of gear 1-9.

[0072] like Figure 4 、 Figure 6 、 Figure 8 、 Figure 10 as well as Figure 16As shown, the upper portion of drive shaft 24 is fixed to guide plate 1 28, which slides onto two guide shafts 1 29 fixed within integrated housing 23. Springs 1 30 are mounted on guide shafts 1 29, pushing guide plate 1 28 downward. An iron block 31 is fixed above guide plate 1 28, and an electromagnet 32, consisting of an iron core and a coil, is fixed within integrated housing 23, positioned directly above iron block 31. To achieve transmission switching within the integrated assembly, when the coil is energized, electromagnet 32 ​​attracts iron block 31, overcoming the elastic force of spring 1 30 and moving it upward. At this point, drive shaft 24 and retaining rib 25 disengage from docking port 27, thereby switching between motor 1 8 and motor 2 13.

[0073] like Figure 4 、 Figure 6 、 Figure 8 、 Figure 10 as well as Figure 17 As shown, the sidewalls of the integrated housing 23 are mounted with two self-locking assemblies (I) for use with the inner side of the locking disc 7. These assemblies include an L-shaped self-locking probe (I) 33 extending through the sidewall of the integrated housing 23. These L-shaped probes 33 are slidably mounted on a guide shaft (II) 34 fixed to the sidewall of the integrated housing 23. A spring (II) 35 is mounted on the guide shaft (II) 34 to propel the L-shaped probes 33 toward the ratchet teeth on the inner side of the locking disc 7. To achieve one-way self-locking of the integrated assembly, the spring (II) 35 acts to reliably force the L-shaped probes 33 between two adjacent ratchet teeth on the inner side of the locking disc 7, preventing the integrated assembly from rotating in the opposite direction.

[0074] like Figure 18 As shown, the sidewalls of the tensioning disc 3 are mounted with two self-locking assemblies 2 for use with the outer side of the locking disc 7. The self-locking assemblies 2 include L-shaped self-locking probes 2 36 that extend through the sidewalls of the tensioning disc 3. The L-shaped self-locking probes 2 36 are slidably mounted on guide shafts 3 37 fixed to the sidewalls of the tensioning disc 3. The guide shafts 37 are sleeved with springs 38 that push the L-shaped self-locking probes 2 36 toward the ratchet teeth on the outer side of the locking disc 7. Under the elastic action of the springs 3 38, the L-shaped self-locking probes 2 36 always extend between two adjacent ratchet teeth on the outer side of the locking disc 7, preventing the tensioning disc 3 from rotating in the reverse direction after rotation. To achieve one-way self-locking of the tensioning disc 3, the L-shaped self-locking probes 2 36 always extend between two adjacent ratchet teeth on the outer side of the locking disc 7 under the elastic action of the springs 3 38, preventing the tensioning disc 3 from rotating in the reverse direction after rotation.

[0075] like Figure 7 As shown, the diameter of gear 2 15 is smaller than the diameter of toothed disc 16. In order to reduce the driving load of motor 2 13, the diameter of gear 2 15 is designed to be smaller and the diameter of toothed disc 16 is designed to be larger. When the two are in transmission, motor 2 13 will be more "labor-saving", thereby reducing the driving load of motor 2 13.

[0076] A bidirectional unlimited-upper-limit adjustable overhead cable tensioning method is implemented using the bidirectional unlimited-upper-limit adjustable overhead cable tensioning device, and the implementation steps are as follows:

[0077] S1. Pass the cable 39 to be overhead between the winding caps 5 of the two cable tie rods 4. Then, insert the screw rod 18 through the top of the two cable tie rods 4. At this time, the screw rod 18 and the nut 19 cooperate to seal the cable 39 between the two cable tie rods 4. Then, wind the cable 39 around the winding cap 5 on the tensioning rod 12.

[0078] S2. First, adjust the radius of the cable 39 before it is rotated and tightened through the first tensioning mechanism; start the motor 18, and drive the gear 19 to rotate through the integrated component. At this time, the two tensioning rods 12 gradually move away from the position of the cable tie rod 4. At this time, the cable 39 is continuously linearly tensioned under the tension of the two tensioning rods 12. After being moved, the two tensioning rods 12 cannot move back under the joint locking of the self-locking component 1 and the locking disk 7 to ensure the reliability after tensioning; if the cable 39 reaches a fully tensioned state during this process, the cable 39 tensioning work is completed. Figure 1 If the cable 39 is still in a relaxed state during this process, the cable 39 tensioning work continues;

[0079] S3. The cable 39 tensioning operation continues. The first tensioning mechanism adjusts the cable 39 to its maximum radius before rotation and tensioning. The second tensioning mechanism then continues to rotate and tension the cable. The coil is energized. The electromagnet 32 ​​then attracts the iron block 31, overcoming the elastic force of the spring 1 30 and moving it upward. The transmission shaft 24 and the limiting rib 25 then disengage from the docking port 27, thereby switching the transmission between the motor 1 8 and the motor 2 13.

[0080] S4, start the second motor 13, the second motor 13 drives the second gear 15 to rotate through the coupling 14, drives the toothed disc 16 to rotate under the transmission of the toothed chain 17, and finally drives the tensioning disc 3 to rotate. After the tensioning disc 3 is rotated, it cannot be reversely rotated under the joint locking of the self-locking component 2 and the locking disc 7 to ensure the reliability after tensioning; until the cable 39 is in a fully tensioned state, the cable 39 tensioning work is completed. Figure 2 shown.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bidirectional, unlimited-limit adjustable overhead cable tensioning device, comprising an overhead chassis, a tensioning disc rotatably mounted on the upper surface of the chassis via an annular slideway, two parallel and perpendicular cable tie rods fixed at the center of the cable tie rods, each of which has a winding cap rotatably mounted on it, wherein the cable is routed between the winding caps of the two cable tie rods; Its characteristics are: The upper surface of the overhead chassis is fixedly mounted with a locking disc located inside the tension disc via a lifting seat, and the locking disc can cooperate to complete a one-way locking of the inner side and the one-way locking of the outer side respectively; The overhead chassis is provided with a first tensioning mechanism located on the inner side of the locking disc and a second tensioning mechanism located on the outer side of the locking disc, wherein the first tensioning mechanism and the second tensioning mechanism perform tensioning work in sequence; The first tensioning mechanism includes a motor 1 fixedly mounted on the lower surface of the overhead chassis, a gear 1 being concentrically fixed to the rotating shaft of the motor 1 through an integrated component integrating coaxial transmission, transmission switching, and one-way self-locking, two parallel racks being meshed with each other on the gear 1; the racks being plugged and fixed to a tensioning rod which is parallel to the cable tie rod and slides in a slide groove 1, a winding cap being rotatably mounted on the tensioning rod, wherein the cable is gradually linearly tightened after passing around the winding cap on the tensioning rod; The second tensioning mechanism includes a second motor fixedly mounted on the lower surface of the overhead chassis, a second gear is concentrically fixed to the rotating shaft of the second motor through a coupling, a toothed disc is fixed on the outer side of the tensioning disc and is located on the same plane as the second gear, and the toothed disc and the second gear are engaged and transmitted by a tooth chain; when the tensioning disc is driven to rotate, the cable can be rotated and tightened.

2. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 1, characterized in that: The top ends of the two cable tie rods are penetrated by screw rods, and the ends of the screw rods are matched with nuts for fastening the screw rods to the top ends of the cable tie rods. At this time, the cables are located under the screw rods.

3. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 2, characterized in that: A bottom bracket is fixed at the bottom edge of the winding cap, and both the winding cap and the bottom bracket are made of insulating rubber material.

4. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 3, characterized in that: L-shaped auxiliary sliding bars are respectively inserted and fixed on both sides of the tightening rod, and the L-shaped auxiliary sliding bars are slidably installed in a second sliding groove which is parallel to the first sliding groove.

5. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 4, characterized in that: The integrated component includes an integrated shell concentrically fixedly installed on a lower surface of the gear, and a transmission shaft is installed on the integrated shell in a limiting manner from the inside to the outside, and at least one group of limiting ribs are fixed on the axial side of the transmission shaft; the transmission below the limiting rib is matched with a transmission sleeve concentrically fixed on the rotating shaft of motor 1, and the upper surface of the transmission sleeve is provided with a docking interface for use with the transmission shaft and the limiting rib; when the integrated shell is matched in the docking interface through the transmission shaft and the limiting rib, motor 1 can realize coaxial transmission of gear 1.

6. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 5, characterized in that: The top of the transmission shaft is fixed on a guide plate 1, and the guide plate 1 is slidably installed on two guide shafts 1 fixed in the integrated shell, and the guide shaft 1 is sleeved with a spring 1 that pushes the guide plate 1 to move downward; an iron block is fixed above the guide plate 1, and an electromagnet is fixed inside the integrated shell and is located directly above the iron block. The electromagnet consists of an iron core and a coil; when the coil is energized, the electromagnet can absorb the iron block to overcome the elastic force of the spring 1 and move upward. At this time, the transmission shaft and the limit rib are disengaged from the docking interface, thereby realizing the transmission switching between motor 1 and motor 2.

7. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 6, characterized in that: At least two self-locking components are installed on the side wall of the integrated shell and are used in conjunction with the inner side of the locking disc; the self-locking component includes an L-shaped self-locking probe that passes through the side wall of the integrated shell, and the L-shaped self-locking probe is slidably installed on a guide shaft fixed on the side wall of the integrated shell, and the guide shaft is sleeved with a spring that pushes the L-shaped self-locking probe to move toward the ratchet on the inner side of the locking disc; under the elastic action of the spring, the L-shaped self-locking probe always extends between two adjacent ratchets on the inner side of the locking disc, so that the integrated component cannot rotate reversely after rotation.

8. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 7, characterized in that: At least two self-locking components 2 are installed on the side wall of the tensioning disk and are used in conjunction with the outer side of the locking disk; the self-locking component 2 includes an L-shaped self-locking probe 2 that passes through the side wall of the tensioning disk, and the L-shaped self-locking probe 2 is slidably installed on a guide shaft 3 fixed on the side wall of the tensioning disk, and the guide shaft 3 is sleeved with a spring 3 that pushes the L-shaped self-locking probe 2 to move toward the ratchet on the outer side of the locking disk; under the elastic action of the spring 3, the L-shaped self-locking probe 2 always extends between two adjacent ratchets on the outer side of the locking disk, so that the tensioning disk cannot rotate reversely after rotation.

9. The bidirectional unlimited-limit adjustable overhead cable tensioning device according to claim 8, characterized in that: The diameter of the second gear is smaller than the diameter of the gear disc.

10. A bidirectional unlimited-limit adjustable overhead cable tensioning method, characterized by: The method is implemented using the bidirectional unlimited-upper-limit adjustable overhead cable tensioning device according to claim 9, and the implementation steps are as follows: S1. Pass the cable to be overhead between the winding caps of the two cable tie rods, then insert the screw rod through the top of the two cable tie rods. At this time, the screw rod and nut cooperate to seal the cable between the two cable tie rods, and then wind the cable around the winding cap on the tensioning rod; S2. First, the radius of the cable before rotation and tightening is adjusted by the first tensioning mechanism; the motor 1 is started, and the gear 1 is driven to rotate through the integrated component. At this time, the two tensioning rods gradually move away from the location of the cable tie rod. At this time, the cable is continuously linearly tensioned under the tension of the two tensioning rods. After the two tensioning rods are moved, they cannot move back due to the joint locking of the self-locking component 1 and the locking disk, so as to ensure the reliability after tensioning; If the cable is fully tensioned during this process, the cable tensioning work is completed; if the cable is still in a loose state during this process, the cable tensioning work continues; S3: The cable tensioning operation continues. After the radius of the cable before rotation and tensioning is adjusted to the maximum by the first tensioning mechanism, the cable is further rotated and tensioned by the second tensioning mechanism. The coil is first energized. At this time, the electromagnet can attract the iron block and overcome the elastic force of the spring 1 and move upward. At this time, the transmission shaft and the limit rib are separated from the docking interface, thereby realizing the transmission switching between motor 1 and motor 2. S4. Start motor 2, which drives gear 2 to rotate through the coupling, drives the toothed disc to rotate under the transmission of the toothed chain, and finally drives the tensioning disc to rotate. After the tensioning disc is rotated, it cannot be reversed due to the joint locking of self-locking component 2 and the locking disc to ensure the reliability after tensioning. The cable tensioning work is completed until the cable is fully tensioned.

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