Portable cable overhead device

Abstract

The invention discloses a portable cable overhead device, which relates to the technical field of cables and comprises a bottom plate, a fixing mechanism is arranged on the bottom plate, a folding mechanism is arranged at the top of the bottom plate, an adjusting mechanism is arranged at the top of the folding mechanism, and a self-locking mechanism is arranged on the adjusting mechanism. A limiting mechanism is arranged at the top of the adjusting mechanism, two supports are arranged at the top of the limiting mechanism, two pulleys are rotatably connected to the inner sides of the two supports, the adjusting mechanism comprises a fixing shell, a sliding column is slidably connected into the fixing shell, and a rack is fixedly mounted at the bottom of the sliding column. According to the portable cable overhead device, by arranging the self-locking mechanism and the adjusting mechanism, the effect of adjusting the height of the pulley is achieved, operation is convenient and fast, and the problems that in the prior art, the process of adjusting the height each time is relatively tedious, much time and labor are consumed, and the working efficiency is reduced are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a portable cable overhead device. Background Technique

[0002] A cable is a device for transmitting electrical energy or signals, usually made of one or more mutually insulated conductors and an outer insulating protective layer, and can be used in multiple fields such as power transmission, communication, and control.

[0003] An overhead cable (fully called an overhead insulated cable) is an overhead conductor equipped with an insulating layer and a protective outer skin, a special cable manufactured using a production process similar to that of a cross-linked cable, and is a new power transmission method between overhead conductors and underground cables. Overhead cables are all single-core, and according to their different structures, they can be divided into hard aluminum wire structures, hard-drawn copper wire structures, aluminum alloy wire structures, steel core or aluminum alloy core support structures, and self-supporting three-core stranded structures (the wire cores can be hard aluminum or hard copper wires), etc.

[0004] In the prior art, by matching the limit bolts on the outer column surface of the telescopic column with the threaded holes on the inner column surface, the overall height of the support column can be conveniently adjusted, facilitating flexible adjustment to a suitable height in different cable overhead scenarios. After adjusting to the appropriate height, the height of the telescopic column can be locked by tightening the limit bolts so that they are fastened to the corresponding threaded holes, ensuring that the cable can be accurately overhead at a predetermined position.

[0005] However, the existing devices have the following deficiencies during use: In the prior art, each time the height is adjusted, the limit bolts need to be loosened first, then the telescopic column is manually stretched or compressed to a roughly appropriate position, and then the corresponding threaded holes are found by rotating the telescopic column and the limit bolts are tightened to lock. This process is relatively cumbersome, especially in an environment where the height needs to be frequently adjusted, which will consume more time and labor and reduce work efficiency.

[0006] Therefore, we propose a portable cable overhead device to solve the problems raised above. Summary of the Invention

[0007] The purpose of the present invention is to provide a portable cable overhead device. By setting a self-locking mechanism and an adjustment mechanism, and using the meshing transmission of a rotating rod, a gear, and a rack, the sliding column can move upward in the fixed shell. At the same time, by pressing the pressing plate, the pawl can be disengaged from the ratchet wheel, and the restriction on the ratchet wheel can be released, so that the purpose of the sliding column moving downward can be achieved by reversing the rotating handle, to solve the problems raised in the above background technique.

[0008] To achieve the above object, the present invention provides the following technical solution: A portable cable overhead device, including a bottom plate, a fixing mechanism is provided on the bottom plate, a folding mechanism is provided on the top of the bottom plate, an adjusting mechanism is provided on the top of the folding mechanism, a self-locking mechanism is provided on the adjusting mechanism, a limiting mechanism is provided on the top of the adjusting mechanism, two brackets are provided on the top of the limiting mechanism, two pulleys are rotatably connected to the inner sides of the two brackets. The adjusting mechanism includes a fixed shell, a sliding column is slidably connected in the fixed shell, a rack is fixedly installed at the bottom of the sliding column, a rotating rod is rotatably connected in the fixed shell, a gear is fixedly sleeved on the outer surface of the rotating rod, the rack is meshed with the gear, one end of the rotating rod movably penetrates through the fixed shell. The self-locking mechanism includes a ratchet wheel, the ratchet wheel is fixedly sleeved on the outer surface of the rotating rod, a mounting rod is fixedly connected to one side of the fixed shell, a pawl is rotatably connected to the outer surface of the mounting rod, one end of the pawl is engaged in the tooth groove on the ratchet wheel, a fixing plate is fixedly connected to one side of the fixed shell, a first return spring is fixedly connected to the bottom of the fixing plate, and the bottom end of the first return spring is fixedly connected to the pawl.

[0009] Preferably, the folding mechanism includes a mounting frame, the mounting frame is fixedly connected to the top of the bottom plate, a connecting block is rotatably connected to the inner side of the mounting frame, and the fixed shell is fixedly connected to the top of the connecting block.

[0010] Preferably, two through holes are provided on one side of the mounting frame, and a fixing hole is provided on one side of the connecting block.

[0011] Preferably, a fixing frame is fixedly connected to one side of the connecting block, a movable plate is arranged inside the fixing frame, a limiting rod is fixedly connected to one side of the movable plate, a pull rod is fixedly connected to the other side of the movable plate, and a second return spring is sleeved on the outer surface of the pull rod.

[0012] Preferably, one end of the pull rod movably penetrates through the fixing frame and is fixedly installed with a pull ring, a first limiting groove is provided on the inner top of the fixing frame, a first limiting block is slidably connected in the first limiting groove, and the bottom of the first limiting block is fixedly connected to the movable plate.

[0013] Preferably, the limiting mechanism includes a support plate, the support plate is fixedly connected to the top of the sliding column, a support frame is fixedly connected to the top of the support plate, a linear guide rail is fixedly installed on the top of the support frame, and two guide rail sliders are slidably connected on the linear guide rail.

[0014] Preferably, the two brackets are fixedly connected to the tops of the two guide rail sliders, a bidirectional threaded rod is rotatably connected to the inner side of the support frame, two moving frames are sleeved on the outer surface of the bidirectional threaded rod, and the two moving frames are fixedly connected to the two guide rail sliders.

[0015] Preferably, two arc-shaped plates are fixedly connected to the top of the support plate. A worm is rotatably connected between the two arc-shaped plates. A worm gear is fixedly sleeved on the outer surface of the bidirectional threaded rod. The worm gear is meshed with the worm. The smooth end of the worm movably penetrates through one of the arc-shaped plates and is fixedly provided with a rotating cap.

[0016] Preferably, a pressing plate is fixedly connected to the outer surface of the pawl. A rotating handle is fixedly installed at one end of the rotating rod. A second limiting groove is formed inside the fixed shell. A second limiting block is slidably connected in the second limiting groove. One side of the second limiting block is fixedly connected to the rack.

[0017] Preferably, the fixing mechanism includes a groove. The groove is formed in the top of the bottom plate. A limiting plate is arranged in the groove. An embedding nail is fixedly connected to the bottom of the limiting plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting the self-locking mechanism and the adjusting mechanism, and using the meshing transmission of the rotating rod, the gear and the rack, the sliding column can move upward in the fixed shell. At the same time, by pressing the pressing plate, the pawl can be disengaged from the ratchet wheel, and the restriction on the ratchet wheel can be released. Then, by reversing the rotating handle, the sliding column can move downward, so as to achieve the effect of adjusting the height of the pulley. The operation is convenient. And with the ratchet wheel, the pawl and the first return spring in the self-locking mechanism, the height stability after adjustment is ensured, solving the problem that in the prior art, the process of adjusting the height each time is relatively cumbersome, which will consume more time and labor and reduce the work efficiency.

[0019] 2. By setting the folding mechanism, using the rotational connection mode of the mounting frame and the connecting block, and the combined cooperation among the through hole, the fixing hole, the fixing frame, the movable plate, the limiting rod, the pull rod, the second return spring, the pull ring, the first limiting groove and the first limiting block, when the device is not in use, the device can be conveniently folded and stored, reducing the occupied space, achieving the effects of being easy to carry and transport and saving storage space, and improving the portability of the device.

[0020] 3. By setting the limiting mechanism, using the cooperation of the linear guide rail, the guide rail slider, the bidirectional threaded rod and the movable frame, and the worm and worm gear transmission structure, the effect of facilitating the adjustment of the distance between the two pulleys is achieved, so as to adapt to the overhead requirements of cables of different sizes, increasing the applicable range of the device and improving the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional view of the main structure of a portable cable overhead device of the present invention; Figure 2This is a three-dimensional view of the partially unfolded structure of the limit plate in a portable cable overhead device of the present invention; Figure 3 This is a three-dimensional view of the partially unfolded structure of the folding mechanism in a portable cable overhead device of the present invention; Figure 4 This is a three-dimensional view of the partial structure of the folding mechanism in a portable cable overhead device of the present invention; Figure 5 This is a three-dimensional view of the partially sectional structure of the adjustment mechanism in a portable cable overhead device of the present invention; Figure 6 This is a three-dimensional view of the structure of the worm in a portable cable overhead device of the present invention; Figure 7 This is a three-dimensional view of the structure of the bidirectional threaded rod in a portable cable overhead device of the present invention; Figure 8 This is in a portable cable overhead device of the present invention Figure 1 The enlarged three-dimensional view of part A.

[0022] In the figure: 1, bottom plate; 2, fixing mechanism; 201, groove; 202, limit plate; 203, embedding nail; 3, folding mechanism; 301, mounting frame; 302, connecting block; 303, through hole; 304, fixing hole; 305, fixing frame; 306, movable plate; 307, limit rod; 308, pull rod; 309, second return spring; 310, pull ring; 311, first limit groove; 312, first limit block; 4, adjustment mechanism; 401, fixed shell; 402, sliding column; 403, rack; 404, rotating rod; 405, gear; 406, rotating handle; 407, second limit groove; 408, second limit block; 5, self-locking mechanism; 501, ratchet; 502, mounting rod; 503, pawl; 504, fixing plate; 505, first return spring; 506, pressing plate; 6, limiting mechanism; 601, support plate; 602, support frame; 603, linear guide rail; 604, guide rail slider; 605, bidirectional threaded rod; 606, moving frame; 607, arc plate; 608, worm; 609, worm gear; 610, rotating cap; 7, bracket; 8, pulley. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Such as Figure 1 And Figure 8As shown in the figure, the present invention provides a technical solution: a portable cable overhead device, including a bottom plate 1, a fixing mechanism 2 is arranged on the bottom plate 1, a folding mechanism 3 is arranged on the top of the bottom plate 1, an adjusting mechanism 4 is arranged on the top of the folding mechanism 3, a self-locking mechanism 5 is arranged on the adjusting mechanism 4, a limiting mechanism 6 is arranged on the top of the adjusting mechanism 4, two brackets 7 are arranged on the top of the limiting mechanism 6, and two pulleys 8 are rotatably connected inside the two brackets 7. The adjusting mechanism 4 includes a fixed shell 401, a sliding column 402 is slidably connected inside the fixed shell 401, a rack 403 is fixedly installed at the bottom of the sliding column 402, a rotating rod 404 is rotatably connected inside the fixed shell 401, a gear 405 is fixedly sleeved on the outer surface of the rotating rod 404, the rack 403 is meshed with the gear 405, one end of the rotating rod 404 movably penetrates through the fixed shell 401. The self-locking mechanism 5 includes a ratchet wheel 501, the ratchet wheel 501 is fixedly sleeved on the outer surface of the rotating rod 404, a mounting rod 502 is fixedly connected to one side of the fixed shell 401, a pawl 503 is rotatably connected to the outer surface of the mounting rod 502, and one end of the pawl 503 is engaged in the tooth groove on the ratchet wheel 501. A fixing plate 504 is fixedly connected to one side of the fixed shell 401, a first return spring 505 is fixedly connected to the bottom of the fixing plate 504, and the bottom end of the first return spring 505 is fixedly connected to the pawl 503.

[0025] As Figure 3 and Figure 5 shown in the figure, the folding mechanism 3 includes a mounting frame 301, the mounting frame 301 is fixedly connected to the top of the bottom plate 1, a connecting block 302 is rotatably connected inside the mounting frame 301, and the fixed shell 401 is fixedly connected to the top of the connecting block 302. By setting the mounting frame 301 and the connecting block 302, the adjusting mechanism 4, the limiting mechanism 6, the brackets 7 and the pulleys 8 can be folded. When the device is not in use, it can be folded up, greatly reducing the occupied space of the device, achieving the effects of convenient carrying and storage, and improving the portability of the device.

[0026] As Figure 3 shown in the figure, two through holes 303 are opened on one side of the mounting frame 301, and a fixing hole 304 is opened on one side of the connecting block 302. Through the setting of the two through holes 303 and the fixing hole 304, when the device is folded to a suitable position, with the cooperation of the limiting structure, it is convenient to relatively fix the connecting block 302 and the mounting frame 301, preventing the folding structure from accidentally unfolding due to shaking during carrying or transportation, and ensuring the stability and safety of the device in the non-working state.

[0027] As Figure 3 and Figure 4As shown in the figure, a fixing frame 305 is fixedly connected to one side of the connecting block 302. An activity plate 306 is arranged inside the fixing frame 305. A limiting rod 307 is fixedly connected to one side of the activity plate 306. A pull rod 308 is fixedly connected to the other side of the activity plate 306. A second return spring 309 is sleeved on the outer surface of the pull rod 308. When it is necessary to adjust the rotation angle of the connecting block 302 to achieve folding or unfolding operations, under the combined cooperation of the pull rod 308, the activity plate 306 and the second return spring 309, the limiting rod 307 is disengaged from the corresponding limiting structure on the mounting frame 301. At this time, the connecting block 302 can rotate freely. When it rotates to a suitable position, the pull rod 308 is released. Under the elastic force of the second return spring 309, the limiting rod 307 is reinserted into the limiting structure to fix the position of the connecting block 302. The operation is simple and fast, improving convenience and work efficiency.

[0028] As Figure 4 shown, one end of the pull rod 308 movably penetrates through the fixing frame 305 and is fixedly installed with a pull ring 310. A first limiting groove 311 is opened at the inner top of the fixing frame 305. A first limiting block 312 is slidably connected in the first limiting groove 311. The bottom of the first limiting block 312 is fixedly connected to the activity plate 306. By providing the pull ring 310, it is convenient for the operator to apply force to pull the pull rod 308, improving convenience. The cooperation between the first limiting groove 311 and the first limiting block 312 plays a role in limiting the activity plate 306, preventing the activity plate 306 from shifting or shaking during movement.

[0029] As Figure 1 、 Figure 5 and Figure 6 shown, the limiting mechanism 6 includes a support plate 601. The support plate 601 is fixedly connected to the top of the sliding column 402. A support frame 602 is fixedly connected to the top of the support plate 601. A linear guide rail 603 is fixedly installed on the top of the support frame 602. Two guide rail sliders 604 are slidably connected to the linear guide rail 603. The cooperation between the linear guide rail 603 and the two guide rail sliders 604 provides accurate guidance for the movement of the support 7, achieving the effect that the two supports 7 can slide smoothly along the linear guide rail 603.

[0030] As Figure 1 、 Figure 6 and Figure 7As shown in the figure, two brackets 7 are fixedly connected to the tops of two guide rail sliders 604. A bidirectional threaded rod 605 is rotatably connected to the inner side of the support frame 602. Two moving frames 606 are sleeved on the outer surface of the bidirectional threaded rod 605. The two moving frames 606 are fixedly connected to the two guide rail sliders 604. The two guide rail sliders 604 play a role in limiting the two moving frames 606. When the bidirectional threaded rod 605 rotates, it can drive the two moving frames 606 to move relatively or away from each other, and then drive the two pulleys 8 to move relatively or away from each other, achieving the effect of facilitating the adjustment of the distance between the two pulleys 8 to adapt to the overhead requirements of cables of different sizes and improving the scope of application.

[0031] As Figure 6 and Figure 7 shown in the figure, two arc-shaped plates 607 are fixedly connected to the top of the support plate 601. A worm 608 is rotatably connected between the two arc-shaped plates 607. A worm gear 609 is fixedly sleeved on the outer surface of the bidirectional threaded rod 605. The worm gear 609 is meshed with the worm 608. The smooth end of the worm 608 movably penetrates through one of the arc-shaped plates 607 and is fixedly installed with a rotating cap 610. By setting the rotating cap 610, it is convenient for the operator to rotate the worm 608. The meshing transmission between the worm 608 and the worm gear 609 has a self-locking characteristic. When the worm 608 is rotated by driving the rotating cap 610, the worm gear 609 drives the bidirectional threaded rod 605 to rotate. After the positions of the two pulleys 8 are adjusted, the bidirectional threaded rod 605 will not easily reverse, thus ensuring the fixation of the positions of the two pulleys 8 and preventing the influence on the overhead effect of the cable due to the position change of the two pulleys 8 during the overhead process of the cable.

[0032] As Figure 5 and Figure 8 shown in the figure, a pressing plate 506 is fixedly connected to the outer surface of the pawl 503. A rotating handle 406 is fixedly installed at one end of the rotating rod 404. A second limiting groove 407 is formed in the inner side of the fixed shell 401. A second limiting block 408 is slidably connected in the second limiting groove 407. One side of the second limiting block 408 is fixedly connected to the rack 403. By setting the pressing plate 506, it is convenient for the operator to press the pawl 503. Pressing the pressing plate 506 can make the pawl 503 disengage from the ratchet wheel 501, and the restriction on the ratchet wheel 501 can be released. Then, the rotating rod 404 can be driven to reverse by reversing the rotating handle 406 to achieve the purpose of moving the sliding column 402 downward. After releasing the pressing plate 506, the pawl 503 can be re-inserted into the tooth groove on the ratchet wheel 501 under the elastic force of the first return spring 505 to achieve self-locking and prevent the rotating rod 404 from rotating. The cooperation between the second limiting groove 407 and the second limiting block 408 limits the up and down movement of the rack 403, ensuring that the rack 403 can only move smoothly along the predetermined direction in the fixed shell 401 and preventing the rack 403 from shifting or shaking during the movement, improving the stability of the adjusting mechanism 4.

[0033] As Figure 1 and Figure 2 shown, the fixing mechanism 2 includes a groove 201 opened at the top of the bottom plate 1. A limiting plate 202 is arranged in the groove 201. An embedding nail 203 is fixedly connected to the bottom of the limiting plate 202. By driving the embedding nail 203 at the bottom of the limiting plate 202 into the ground, the device is fixed, and at the same time, it can also prevent the device from tipping over due to the excessive weight of the overhead cable.

[0034] Usage method and working principle of the device: In the preparation stage, place the device at the position where cable overhead is required, and then drive the embedding nail 203 at the bottom of the limiting plate 202 into the ground to fix the device.

[0035] In the height adjustment stage, rotate the turning handle 406 to drive the rotating rod 404 to rotate. The rotating rod 404 drives the gear 405 to rotate. Since the gear 405 is meshed and connected with the rack 403, the rack 403 drives the sliding column 402 to move upward. The rack 403 drives the first limiting block 408 to slide upward synchronously in the first limiting groove 407, thereby driving the two pulleys 8 to move upward. When the height of the two pulleys 8 is too high, the operator presses down the pressing plate 506 to make the pawl 503 disengage from the ratchet wheel 501. At the same time, the first return spring 505 is compressed and starts to contract, thereby releasing the restriction on the ratchet wheel 501. At this time, reverse the turning handle 406 to drive the rotating rod 404 to reverse, so that the sliding column 402 drives the two pulleys 8 to descend to a suitable overhead height, and then release the pressing plate 506. Under the elastic force of the first return spring 505, the pawl 503 is driven to re-engage with the tooth groove on the ratchet wheel 501 to prevent the ratchet wheel 501 from reversing.

[0036] In the cable overhead stage, after the height of the two pulleys 8 is adjusted, rotate the rotating cap 610 to drive the worm 608 to rotate. Since the worm 608 is meshed and connected with the worm gear 609, the double-threaded screw rod 605 is driven to rotate. The two guide rail sliders 604 limit the two moving frames 606, so that the double-threaded screw rod 605 drives the two moving frames 606 to move relatively. The two moving frames 606 drive the two guide rail sliders 604 to slide relatively synchronously on the linear guide rail 603, so that the two brackets 7 drive the two pulleys 8 to move relatively. The operator adjusts the distance between the two pulleys 8 according to the size of the cable, and then places the cable in the middle of the two pulleys 8. By utilizing the rolling property of the two pulleys 8, the overhead laying or moving operation of the cable is realized.

[0037] Folding stage: when the device is no longer in use, pull the pull ring 310 to drive the pull rod 308 to move outwards, so that the movable plate 306 drives the limit rod 307 to move outwards. The movable plate 306 drives the second limit block 312 to slide outwards synchronously in the second limit groove 311, so that the second return spring 309 is compressed and begins to contract. At the same time, the limit rod 307 is separated from one of the through holes 303 and the fixing hole 304. At this time, the restriction on the connecting block 302 is released. Then rotate the fixed shell 401 to drive the connecting block 302 to rotate, and perform folding operations on the adjusting mechanism 4, the limiting mechanism 6, the bracket 7 and the pulley 8. When the connecting block 302 rotates to the target position, release the pull ring 310. Under the elastic force of the second return spring 309, drive the limit rod 307 to pass through the other through hole 303 and squeeze into the fixing hole 304, thereby limiting and fixing the connecting block 302 and completing the folding operation.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable cable overhead device, characterized in that: The invention comprises a bottom plate (1), a fixing mechanism (2) being arranged on the bottom plate (1), a folding mechanism (3) being arranged on the top of the bottom plate (1), an adjusting mechanism (4) being arranged on the top of the folding mechanism (3), a self-locking mechanism (5) being arranged on the adjusting mechanism (4), a limiting mechanism (6) being arranged on the top of the adjusting mechanism (4), two brackets (7) being arranged on the top of the limiting mechanism (6), and two pulleys (8) being rotatably connected to the inner sides of the two brackets (7); The adjustment mechanism (4) comprises a fixed shell (401), a sliding column (402) is slidably connected inside the fixed shell (401), a rack (403) is fixedly installed at the bottom of the sliding column (402), a rotating rod (404) is rotatably connected inside the fixed shell (401), a gear (405) is fixedly sleeved on the outer surface of the rotating rod (404), the rack (403) is meshingly connected with the gear (405), and one end of the rotating rod (404) movably passes through the fixed shell (401); The self-locking mechanism (5) comprises a ratchet (501), wherein the ratchet (501) is fixedly sleeved on the outer surface of the rotating rod (404), a mounting rod (502) is fixedly connected to one side of the fixed shell (401), a pawl (503) is rotatably connected to the outer surface of the mounting rod (502), one end of the pawl (503) is engaged in a tooth groove on the ratchet (501), a fixed plate (504) is fixedly connected to one side of the fixed shell (401), a first return spring (505) is fixedly connected to the bottom of the fixed plate (504), and the bottom end of the first return spring (505) is fixedly connected to the pawl (503).

2. A portable cable overhead device according to claim 1, characterized in that: The folding mechanism (3) comprises a mounting frame (301), the mounting frame (301) being fixedly connected to the top of the bottom plate (1), the inner side of the mounting frame (301) being rotatably connected to a connecting block (302), and the fixing shell (401) being fixedly connected to the top of the connecting block (302).

3. A portable cable overhead device according to claim 2, characterized in that: Two through holes (303) are provided on one side of the mounting frame (301), and a fixing hole (304) is provided on one side of the connecting block (302).

4. A portable cable overhead device according to claim 3, characterized in that: One side of the connection block (302) is fixedly connected to a fixing frame (305), an inner side of the fixing frame (305) is provided with a movable plate (306), one side of the movable plate (306) is fixedly connected to a limiting rod (307), the other side of the movable plate (306) is fixedly connected to a pull rod (308), and the outer surface of the pull rod (308) is sleeved with a second return spring (309).

5. A portable cable overhead device according to claim 4, characterized in that: One end of the pull rod (308) movably passes through the fixing frame (305) and is fixedly mounted with a pull ring (310); a first limiting groove (311) is provided at the inner top of the fixing frame (305); a first limiting block (312) is slidably connected in the first limiting groove (311); and the bottom of the first limiting block (312) is fixedly connected to the movable plate (306).

6. A portable cable overhead device according to claim 1, characterized in that: The limiting mechanism (6) comprises a support plate (601), the support plate (601) is fixedly connected to the top of the sliding column (402), the top of the support plate (601) is fixedly connected to a support frame (602), the top of the support frame (602) is fixedly installed with a linear guide rail (603), and two guide rail sliders (604) are slidably connected to the linear guide rail (603).

7. A portable cable overhead device according to claim 6, characterized in that: The two brackets (7) are fixedly connected to the tops of the two guide rail sliders (604); a bidirectional threaded rod (605) is rotatably connected to the inner side of the support bracket (602); two movable brackets (606) are sleeved on the outer surface of the bidirectional threaded rod (605); and the two movable brackets (606) are fixedly connected to the two guide rail sliders (604).

8. A portable cable overhead device according to claim 7, characterized in that: Two arc-shaped plates (607) are fixedly connected to the top of the support plate (601), a worm (608) is rotatably connected between the two arc-shaped plates (607), a worm wheel (609) is fixedly sleeved on the outer surface of the bidirectional threaded rod (605), the worm wheel (609) is meshingly connected to the worm (608), and a smooth end of the worm (608) movably passes through one of the arc-shaped plates (607) and is fixedly mounted with a rotating cap (610).

9. A portable cable overhead device according to claim 8, characterized in that: A pressing plate (506) is fixedly connected to the outer surface of the pawl (503); a rotating handle (406) is fixedly mounted on one end of the rotating rod (404); a second limiting groove (407) is provided on the inner side of the fixed shell (401); a second limiting block (408) is slidably connected in the second limiting groove (407); and one side of the second limiting block (408) is fixedly connected to the rack (403).

10. A portable cable overhead device according to claim 1, characterized in that: The fixing mechanism (2) comprises a groove (201), the groove (201) being opened at the top of the bottom plate (1), a limiting plate (202) being arranged in the groove (201), and an embedding nail (203) being fixedly connected to the bottom of the limiting plate (202).

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