A cable limit structure for a ship crane

Abstract

The present invention relates to the technical field of ship cranes, and specifically relates to a cable limit structure for a ship crane, including a crane boom and a cable. One end of the crane boom is fixedly connected with a lifting plate, and a winch is arranged at one end of the crane boom. By adopting multiple sets of directional guide wheels to optimize the cable path, and in cooperation with the design of the bending radius adjustment mechanism, the bending radius at the moving pulley of the cable is increased, avoiding the sharp bending of the cable at the moving wheel caused by gravity, enabling the cable to maintain a large bending radius during movement, reducing friction and damage; and through the joint cooperation of the connecting piece and the bending radius adjustment mechanism, while adjusting the bending radius of the cables on both sides of the hook assembly, the cable can also be adaptively tensioned, preventing the situation of cable conveying jamming, and enabling the cable at the bending part to form a stable triangular shape, further avoiding the situation of the suspended load shaking, and improving the overall safety performance of the ship crane.

Description

Technical Field

[0001] The present invention relates to the technical field of ship cranes, and particularly to a cable limit structure for a ship crane. Background Art

[0002] As a key device for offshore operations, ship cranes undertake important tasks such as cargo lifting and transfer. The cable limit structure, as an important part of the crane, its main function is to ensure that the cable moves within a specified range, preventing the cable from being overstretched, worn or entangled, thereby ensuring the safe and stable operation of the crane. Traditional cable limit structures usually adopt physical limit methods, such as setting limit switches, stoppers, etc., and trigger limit signals through the contact between the cable and these physical structures to control the movement range of the cable.

[0003] In the prior art, for example, a small crane with the publication number CN219078837U includes a crane main body, a pulling rope located on the crane main body, and a hook located at one end of the pulling rope. An installation block is arranged at one end of the pulling rope. Two through holes are penetrated through one side of the installation block. One end of the pulling rope passes through one through hole, then bypasses the upper end of the hook, and then passes through the other through hole. A connecting plate is arranged on one side of the installation block. For this small crane, by opening two through holes on one side of the installation block, one end of the pulling rope passes through one through hole, then bypasses the upper end of the hook, and then passes through the other through hole. A pointed plug rod penetrating the pulling rope is fixedly connected to one side of the connecting plate on one side of the installation block. A threaded rod threadedly connected to the installation block is slidably connected through one side of the connecting plate. After the pulling rope is connected to the hook, the pulling rope can be limited and fixed by the pointed plug rod, avoiding the situation of loosening or being inconvenient to disassemble that is likely to occur when using the knotting method.

[0004] However, in the actual use process, although the knotting problem between the hook and the pulling rope is solved, when the object lifted by the hook exceeds the load, under the action of gravity, the cable at the moving wheel will bend sharply, causing the cable to have a small bending radius during movement, resulting in a sharp increase in the friction between the cable and the moving wheel, thereby causing wear of the cable and the moving wheel.

[0005] Therefore, the present invention proposes a cable limit structure for a ship crane to solve the problem that when the object lifted by the existing technical equipment exceeds the load, the cable at the moving wheel bends sharply, resulting in wear of the cable and the moving wheel. While optimizing the cable path, it can quickly respond to the situation where the cable bends sharply at the moving wheel, increase the cable bending radius, reduce cable wear, avoid accidental fracture, and improve the overall safety performance of the ship crane. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a cable limit structure for a ship crane to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: A cable limit structure for a ship crane, including a crane boom and a cable. One end of the crane boom is fixedly connected with a hoisting plate. A winch is arranged at one end of the crane boom. One end of the cable is connected to the winch. The outer surface of the cable is respectively provided with a directional guide wheel I, a directional guide wheel II, and a directional guide wheel III. Inside the center of the hoisting plate, there is a sheet metal vertical plate fixedly connected to one end of the crane boom. The directional guide wheel II and the directional guide wheel III are respectively arranged on both sides of the sheet metal vertical plate. Directly below the sheet metal vertical plate, there is a hook assembly. The hook assembly includes a movable pulley and a connecting member. The connecting member includes a hoisting hook member and a connecting cross plate. A square notch is formed on the inner wall of the upper side of the hook assembly. A limit mounting plate is fixedly installed on the inner surface of the square notch. A bending radius adjusting mechanism is arranged on the limit mounting plate. The bending radius adjusting mechanism includes a driving component, a hollow fixed arm cylinder, a hollow movable rod, and a mounting arc plate I.

[0008] Preferably, the hoisting hook member is movably installed at the lower end of the hook assembly. The connecting cross plate is fixedly installed at the upper end of the hook assembly. Both ends of the connecting cross plate are respectively fixedly connected with parallel end plates. The connecting cross plate and the parallel end plates jointly form a "C"-shaped plate-like structure with an upward opening. A limit walking component is arranged on the upper side of the parallel end plates.

[0009] Preferably, the limit walking component includes a movable plate. The outer surface of the movable plate is slidably connected with the inner wall of the upper end of the parallel end plate. One end of the movable plate is fixedly connected with an anti-detachment cross bar. A toothed plate is arranged at the end of the movable plate away from the anti-detachment cross bar.

[0010] Preferably, a connecting rib plate is arranged inside the anti-detachment cross bar. The connecting rib plate is fixedly installed on the outer surface of the parallel end plate. A touch switch is correspondingly installed in the middle section of the connecting rib plate.

[0011] Preferably, the movable plate is composed of two groups of parallel J-shaped plates. The inner sides of the two groups of parallel J-shaped plates are fixedly connected with a mounting arc plate II. The inner surface of the mounting arc plate II is movably connected with an auxiliary guide wheel II and an auxiliary guide wheel III.

[0012] Preferably, an elastic member is arranged between the mounting arc plate II and the inner side of the parallel end plate. The elastic member includes an elastic member and a limit sleeve. Both ends of the elastic member and the limit sleeve are respectively fixedly connected with the outer surfaces of the mounting arc plate II and the parallel end plate. The elastic member is slidably sleeved on the outer side of the limit sleeve.

[0013] Preferably, the driving component includes a linkage motor fixedly installed on the outer surface of one side of the limit mounting plate. The output end of the linkage motor is electrically connected to the touch switch. A first bevel gear is fixedly connected to the output shaft of the linkage motor. Two second bevel gears are meshed and rotated on the outer surfaces on both sides of the first bevel gear. There are two sets of the second bevel gears symmetrically distributed about the central axis of the first bevel gear. The inner surfaces of the centers of the two sets of second bevel gears are respectively fixedly connected with threaded rods. The outer surface of the threaded rod is rotatably connected to the inner wall of the hollow fixed arm cylinder. A limit cushion block is fixedly added to the end of the threaded rod away from the second bevel gear. The diameter of the limit cushion block is larger than that of the threaded rod.

[0014] Preferably, a central chute is opened on the inner wall of the hollow fixed arm cylinder. Side chutes are respectively opened through on both sides of the central chute. The inner surface of the central chute is slidably connected to the outer surface of the hollow movable rod. The inner wall of one end of the hollow movable rod is threadedly connected to the outer surface of the threaded rod. A sliding side block is fixedly connected to one end of the hollow movable rod. The outer surface of the sliding side block is slidably connected to the inner wall of the side chute.

[0015] Preferably, the end of the hollow movable rod away from the sliding side block is fixedly connected to the outer surface of the first mounting arc plate. A first auxiliary guide wheel is arranged on the inner side of the first mounting arc plate. Tooth discs are respectively arranged on the outer surfaces on both sides of the first mounting arc plate. The tooth discs are rotatably installed on both sides of the first mounting arc plate. The outer surface of the tooth disc is adaptively meshed with the outer surface of the tooth plate.

[0016] Preferably, an auxiliary lubrication component is arranged at the connection between the hollow movable rod and the first mounting arc plate. The auxiliary lubrication component includes an installation cylinder. The installation cylinder is of a hollow cylinder structure. An oil storage sac is arranged in the inner cavity of the installation cylinder. An injection nozzle is arranged at the output end of the oil storage sac. A circular groove is opened at one end of the installation cylinder close to the hollow movable rod. The outer surface of the oil storage sac is movably abutted against the outer surface of the limit cushion block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] A cable limit structure for a ship crane proposed by the present invention optimizes the cable path by adopting multiple sets of directional guide wheels. With the design of the bending radius adjustment mechanism, the bending radius at the moving pulley of the cable is increased, avoiding the sharp bending of the cable at the moving wheel caused by gravity, keeping a large bending radius during the movement of the cable, reducing friction and damage. And through the joint cooperation of the connecting piece and the bending radius adjustment mechanism, while adjusting the bending radius of the cables on both sides of the hook assembly, the cables can also be adaptively tensioned, preventing the situation of cable conveying jamming, and enabling the cables at the bending part to form a stable triangular shape, further avoiding the situation of the suspended object shaking and improving the overall safety performance of the ship crane. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the connection structure of the local crane boom and the hook assembly of the present invention;

[0020] Figure 2 It is a schematic diagram of the hidden structure of the lifting plate of the present invention Figure 1 ;

[0021] Figure 3 It is a schematic diagram of the hidden structure of the lifting plate of the present invention Figure 2 ;

[0022] Figure 4 It is of the present invention Figure 3 The enlarged structure schematic diagram at position A;

[0023] Figure 5 It is a schematic diagram of the connection structure of the emergency anti-falling component and the hook assembly of the present invention;

[0024] Figure 6 It is a schematic diagram of the connection structure of the hook assembly and the bending radius adjusting mechanism of the present invention;

[0025] Figure 7 It is of the present invention Figure 6 The enlarged structure schematic diagram at position B;

[0026] Figure 8 It is a schematic diagram of the limiting structure of the bending radius adjusting mechanism and the traveling component on the cable of the present invention;

[0027] Figure 9 It is a schematic diagram of the connection structure of the traveling component and the mounting arc plate II of the present invention;

[0028] Figure 10 It is a three-dimensional structure schematic diagram of the bending radius adjusting mechanism of the present invention;

[0029] Figure 11 It is a top view sectional structure schematic diagram of the bending radius adjusting mechanism of the present invention;

[0030] Figure 12 It is of the present invention Figure 11 The enlarged structure schematic diagram at position C;

[0031] Figure 13 It is of the present invention Figure 12 The enlarged structure schematic diagram at position C1;

[0032] Figure 14 It is a side view structure schematic diagram of the hook assembly of the present invention.

[0033] In the figure: 1. Crane boom; 11. Cable; 12. First directional guide pulley; 13. Second directional guide pulley; 14. Third directional guide pulley; 2. Lifting plate; 21. Sheet metal vertical plate; 211. Winding drum; 2110. Anti-falling protection rope; 212. Connecting guard plate; 213. Guide bucket; 22. Connecting lifting lug; 3. Hook assembly; 300. Movable pulley; 31. Lifting hook member; 32. Connecting cross plate; 321. Parallel end plate; 322. Movable plate; 3221. Anti-disengagement cross bar; 323. Connecting rib plate; 3231. Touch switch; 3222. Tooth plate; 30. Square notch; 4. Limit mounting plate; 41. Hollow fixed arm cylinder; 410. Side groove; 411. Linkage motor; 412. First bevel gear; 413. Second bevel gear; 414. Threaded rod; 415. Limit cushion block; 42. Hollow movable rod; 421. Sliding side block; 422. Mounting cylinder; 4220. Circular groove; 4221. Oil storage bladder; 4222. Fuel injector; 4223. Connecting collar; 4224. Elastic plate; 43. First mounting arc plate; 431. First auxiliary guide pulley; 432. Tooth disc; 44. Second mounting arc plate; 441. Second auxiliary guide pulley; 442. Third auxiliary guide pulley; 45. Elastic member; 451. Limit sleeve. Detailed implementation manners

[0034] In order to clearly and completely describe the purpose, technical solution of the present invention and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] Embodiment 1. Please refer to Figure 1-14, the present invention provides a technical solution: a cable limit structure for a ship crane, including a crane boom 1 and a cable 11. One end of the crane boom 1 is fixedly connected to a hoisting plate 2. A winch is provided at one end of the crane boom 1. One end of the cable 11 is connected to the winch. The outer surface of the cable 11 is respectively provided with a directional guide wheel one 12, a directional guide wheel two 13 and a directional guide wheel three 14. Inside the center of the hoisting plate 2, there is a sheet metal vertical plate 21 fixedly connected to one end of the crane boom 1. The directional guide wheel two 13 and the directional guide wheel three 14 are respectively arranged on both sides of the sheet metal vertical plate 21. A hook assembly 3 is provided directly below the sheet metal vertical plate 21. The hook assembly 3 includes a movable pulley 300 and a connecting member. The connecting member includes a hoisting hook member 31 and a connecting cross plate 32. A square notch 30 is formed on the upper inner wall of the hook assembly 3. A limit mounting plate 4 is fixedly installed on the inner surface of the square notch 30. A bending radius adjustment mechanism is arranged on the limit mounting plate 4. The bending radius adjustment mechanism includes a driving assembly, a hollow fixed arm cylinder 41, a hollow movable rod 42 and a mounting arc plate one 43; An emergency anti-falling assembly is arranged between the sheet metal vertical plate 21 and the limit mounting plate 4. The emergency anti-falling assembly includes a winding drum 211 and a connecting lug 22. The connecting lug 22 is fixedly installed on the upper outer surface of the limit mounting plate 4. The winding drum 211 is rotatably installed at the lower end of the sheet metal vertical plate 21. One end of the winding drum 211 is driven and controlled by a motor. An anti-falling protection rope 2110 is wound around the outer surface of the winding drum 211. The other end of the anti-falling protection rope 2110 is fixedly connected to the connecting lug 22. A connecting guard plate 212 is fixedly connected to the lower end of the sheet metal vertical plate 21. A guiding hopper 213 is fixedly added to the center section of the connecting guard plate 212. The anti-falling protection rope 2110 is passed through the guiding hopper 213;

[0036] In this embodiment, one end of the cable 11 is connected to the winch, and a directional guide wheel one 12 is arranged at the connection end of the crane boom 1 and the hoisting plate 2 to guide the cable 11. Cooperating with the sheet metal vertical plate 21 installed inside the hoisting plate 2, the directional guide wheel two 13 and the directional guide wheel three 14 are respectively connected to both sides of it, and the end of the cable 11 far from the winch is connected to the lower end of the crane boom 1. When hoisting goods, the goods are hooked by the hoisting hook member 31. At this time, the cable 11 slides directionally on the directional guide wheel one 12, the directional guide wheel two 13 and the directional guide wheel three 14 respectively. A triangular structure is formed between the cable 11 and the hook assembly 3. When the winch pays out the cable, the cable 11 rolls on the movable pulley 300 inside the hook assembly 3, and the hook assembly 3 is lowered under the action of the gravity of the goods and the cable payout of the winch; In addition, cooperating with the emergency anti-falling assembly added at the lower end of the sheet metal vertical plate 21, emergency anti-falling protection is provided for the hook assembly 3. It should be noted that during the overall lowering process of the hook assembly 3, at this time, the cable payout frequency of the winding drum 211 is adjusted to be consistent with the cable payout frequency of the winch, so as not to affect the normal operation of the hook assembly 3 and the hooked goods.

[0037] Embodiment 2. Referring to the appendix Figure 1-14 , on the basis of Embodiment 1, in order to realize the installation of the walking assembly on the connecting cross plate 32: The hoisting hook member 31 is movably installed at the lower end of the hook assembly 3, the connecting cross plate 32 is fixedly installed at the upper end of the hook assembly 3, and parallel end plates 321 are respectively fixedly connected to both ends of the connecting cross plate 32. The connecting cross plate 32 and the parallel end plates 321 jointly form a "C"-shaped plate-like structure with an upward opening, and a limiting walking assembly is arranged on the upper side of the parallel end plate 321; The limiting walking assembly includes a movable plate 322, the outer surface of the movable plate 322 is slidably connected to the inner wall of the upper end of the parallel end plate 321, one end of the movable plate 322 is fixedly connected with an anti-disengagement cross bar 3221, and a toothed plate 3222 is arranged at the end of the movable plate 322 away from the anti-disengagement cross bar 3221; A connecting rib plate 323 is arranged inside the anti-disengagement cross bar 3221, the connecting rib plate 323 is fixedly installed on the outer surface of the parallel end plate 321, and a touch switch 3231 is correspondingly installed in the middle section of the connecting rib plate 323;

[0038] In this embodiment, the connecting cross plate 32 and the hook assembly 3 are jointly installed, and parallel end plates 321 are symmetrically installed at both ends of the connecting cross plate 32. Here, the parallel end plates 321 serve as the limiting components for the horizontal sliding movement of the movable plate 322. The cable 11 passes through the inside of the installation arc plate II 44 and is located between the auxiliary guide wheel II 441 and the auxiliary guide wheel III 442. When the cable 11 moves, the movable plate 322 moves due to the vertical gravity pull of the cable 11. At this time, the toothed plate 3222 arranged at the lower end of the movable plate 322 is adaptively engaged with the surface of the lower toothed disc 432, and the toothed disc 432 rotates. It should be noted that the reason for adding this walking assembly on the parallel end plate 321 is to not only ensure the stability of the horizontal movement of the installation arc plate II 44, but also meet the situation where when the cable 11 bends inward too much, the movable plate 322 is quickly moved inward. At this time, the anti-disengagement cross bar 3221 triggers the touch switch 3231 inside, so as to quickly trigger the driving assembly to quickly adjust the bending radius of the cable 11. Here, the connecting rib plate 323 plays a role in increasing the strength of the touch switch 3231 and blocking protection, avoiding damage to the touch switch 3231 caused by the too fast sliding speed of the movable plate 322.

[0039] Embodiment 3. Referring to the appendix Figure 1-14, on the basis of the second embodiment, in order to achieve the timely response of the driving component: the movable plate 322 is composed of two groups of parallel J-shaped plates, and the inner sides of the two groups of parallel J-shaped plates are fixedly connected with the second mounting arc plate 44. The inner surface of the second mounting arc plate 44 is movably connected with the second auxiliary guide wheel 441 and the third auxiliary guide wheel 442; an elastic member is arranged between the second mounting arc plate 44 and the inner side of the parallel end plate 321. The elastic member includes an elastic member 45 and a limiting sleeve 451. The two ends of the elastic member 45 and the limiting sleeve 451 are respectively fixedly connected with the outer surfaces of the second mounting arc plate 44 and the parallel end plate 321. The elastic member 45 is slidably sleeved on the outer side of the limiting sleeve 451;

[0040] In this embodiment, the elastic member is connected to the back side of the second mounting arc plate 44. When there is a load on the lifting hook member 31, the bending radius of the cable 11 becomes smaller inward under the influence of gravity. At this time, the cable between the second auxiliary guide wheel 441 and the third auxiliary guide wheel 442 bends inward. At this time, the elastic member 45 is quickly stretched, and the limiting sleeve 451 moves accordingly at this time; it should be noted here that when the lifted goods are within the normal load range, the elastic member 45 is always in a state of pulling the second mounting arc plate 44 tightly. And at this time, the anti-disengagement cross bar 3221 is far away from the touch switch 3231, and the driving component will not be triggered. And at this time, the second mounting arc plate 44 always keeps the cable 11 in a larger bending radius and provides a path for the cable 11 to move, and will not cause the cable 11 to deviate from the predetermined path; and it should also be noted that the elastic member can also provide a relatively stable force to the cable 11 at this time, weakening the jitter generated when the cable 11 is running, and further enhancing the stability of the lifting of the ship crane.

[0041] Embodiment 4, referring to the appendix Figure 1-14, on the basis of Embodiment 3, in order to increase the bending radius of the cable 11 when the driving component operates: The driving component includes a linkage motor 411, which is fixedly installed on the outer surface of one side of the limit mounting plate 4. The output end of the linkage motor 411 is electrically connected to the touch switch 3231. A first bevel gear 412 is fixedly connected to the output shaft of the linkage motor 411. Two second bevel gears 413 are meshed and rotated on the outer surfaces on both sides of the first bevel gear 412. There are two sets of the second bevel gears 413, which are symmetrically distributed about the central axis of the first bevel gear 412. The inner surfaces of the centers of the two sets of second bevel gears 413 are respectively fixedly connected with threaded rods 414. The outer surface of the threaded rod 414 is rotatably connected to the inner wall of the hollow fixed arm cylinder 41. A limit cushion block 415 is fixedly added to the end of the threaded rod 414 away from the second bevel gear 413. The diameter of the limit cushion block 415 is larger than the diameter of the threaded rod 414; A central chute is opened on the inner wall of the hollow fixed arm cylinder 41. Side chutes 410 are respectively opened through on both sides of the central chute. The inner surface of the central chute is slidably connected to the outer surface of the hollow movable rod 42. The inner wall of one end of the hollow movable rod 42 is threadedly connected to the outer surface of the threaded rod 414. A sliding side block 421 is fixedly connected to one end of the hollow movable rod 42. The outer surface of the sliding side block 421 is slidably connected to the inner wall of the side chute 410; The end of the hollow movable rod 42 away from the sliding side block 421 is fixedly connected to the outer surface of the first mounting arc plate 43. A first auxiliary guide wheel 431 is arranged on the inner side of the first mounting arc plate 43. Tooth discs 432 are respectively arranged on the outer surfaces on both sides of the first mounting arc plate 43. The tooth discs 432 are rotatably installed on both sides of the first mounting arc plate 43. The outer surface of the tooth disc 432 is adaptively meshed with the outer surface of the tooth plate 3222;

[0042] In this embodiment, the touch switch 3231 is electrically connected to the linkage motor 411. When the linkage motor 411 is triggered, its output shaft rotates and provides driving force to the first bevel gear 412. At this time, the first bevel gear 412 rotates and drives the two second bevel gears 413 on both sides to mesh. The threaded rod 414 rotates and is threadedly adapted to one end of the hollow movable rod 42. The hollow movable rod 42 is limited by both the threaded adaptation and the side chute 410, so that the two first mounting arc plates 43 move away from the position of the limit mounting plate 4 and move to both sides at the same time. At this time, the first auxiliary guide wheel 431 moves on the surface of the cable 11 and pushes the cables 11 on both sides outward, increasing the bending radius of the section of the first mounting arc plate 43 and the movable pulley 300, avoiding the sharp bending of the cable 11. And when the cable 11 is pushed out at this time, it tends to be in a straightened state with the cable clamped between the second auxiliary guide wheel 441 and the third auxiliary guide wheel 442 at the upper end. In this way, the first mounting arc plate 43 and the second mounting arc plate 44 will not intersect and cause wear of the cable 11, and the normal operation of the cable 11 can be maintained; It should be noted that the tooth discs 432 on both sides of the first mounting arc plate 43 are always meshed and adapted to the tooth plate 3222, so as to ensure the stability of the relative movement of the first mounting arc plate 43;

[0043] It should be noted that when it is necessary to tension the cable 11, the driving assembly here drives the two sets of mounting arc plates 43 to make multiple relative movement actions, which can achieve the tensioning effect of the cable 11, avoid the situation of jamming of a certain section of the cable 11 during operation, provide a supporting force for the cable 11 while preventing the cable from loosening, and further improve the conveying efficiency of the cable of the ship crane.

[0044] Embodiment Five. Referring to the attached Figure 1-14 , on the basis of Embodiment Four, in order to achieve the smooth operation of the cable 11: an auxiliary lubrication assembly is provided at the connection between the hollow movable rod 42 and the first mounting arc plate 43. The auxiliary lubrication assembly includes a mounting cylinder 422. The mounting cylinder 422 has a hollow cylindrical structure. An oil storage bag 4221 is arranged in the inner cavity of the mounting cylinder 422. An oil injection nozzle 4222 is arranged at the output end of the oil storage bag 4221. A circular groove 4220 is opened at one end of the mounting cylinder 422 close to the hollow movable rod 42. The outer surface of the oil storage bag 4221 is in movable contact with the outer surface of the limit cushion block 415; a pulling-back assembly is arranged inside the mounting cylinder 422. The pulling-back assembly includes a connecting collar 4223 and an elastic plate 4224. The connecting collar 4223 has an annular structure. The connecting collar 4223 is fixedly sleeved on the outer surface of the mounting cylinder 422. Six groups of elastic plates 4224 are arranged and are circularly arrayed about the central axis of the connecting collar 4223. The six groups of elastic plates 4224 are all fixedly installed on one side surface of the connecting collar 4223. The other end of the elastic plate 4224 is fixedly connected to the inner wall of the mounting cylinder 422. The upper end of the oil storage bag 4221 is connected through a fuel injection pipe. A one-way valve is arranged inside the fuel injection pipe;

[0045] In this embodiment, as Figures 11-13As shown, during the process of providing tension and bending radius support force for the cable 11, the hollow movable rod 42 reciprocates inside the inner side of the mounting arc plate 43. The limiting cushion block 415 connected to one end of the threaded rod 414 not only prevents the hollow movable rod 42 from falling off, but also can achieve the effect of lubricating the surface of the auxiliary guide wheel 431. Specifically, when the hollow movable rod 42 moves and drives the oil storage bag 4221 to contact the limiting cushion block 415, the limiting cushion block 415 squeezes the oil storage bag 4221. At this time, the oil storage bag 4221 undergoes compressive deformation under the influence of external force, and the lubricating oil filled inside is extruded by the oil injection nozzle 4222 and sprayed on the surface of the auxiliary guide wheel 431, so as to achieve the lubrication effect between the surface of the cable 11 and the auxiliary guide wheel 431, reduce the friction force of the cable 11, and improve the smoothness of operation; and by sleeving and installing a connecting collar 4223 on the outer ring of the oil storage bag 4221, when the oil storage bag 4221 is pushed, the elastic plate 4224 stretches. Once the oil storage bag 4221 moves away from the limiting cushion block 415, the oil storage bag 4221 quickly rebounds under the reverse elastic force of the elastic plate 4224, and at this time the lubricating oil no longer sprays out, so as to achieve the automatic lubrication of the cable 11 and the auxiliary guide wheel 431; in addition, in order to facilitate the addition of lubricating oil, an oil injection pipe is provided at the upper end of the oil storage bag 4221, and a one-way valve is installed inside the oil injection pipe to ensure the one-way flow and sealing of the lubricating oil.

[0046] Working principle and usage process of the present invention: In actual use, first, one end of the cable 11 is connected to the winch, and a first directional guide wheel 12 is provided at the connection end of the crane boom 1 and the lifting plate 2 to guide the cable 11. In cooperation with the sheet metal vertical plate 21 installed inside the lifting plate 2, the first directional guide wheel 13 and the third directional guide wheel 14 are respectively connected to both sides thereof, and the end of the cable 11 away from the winch is connected to the lower end of the crane boom 1. When hoisting goods, the goods are hooked by the hoisting hook member 31. At this time, the cable 11 slides and guides on the first directional guide wheel 12, the second directional guide wheel 13, and the third directional guide wheel 14 respectively. A triangular structure is formed between the cable 11 and the hook assembly 3. When the winch pays out the cable, the cable 11 rolls on the movable pulley 300 inside the hook assembly 3, and the hook assembly 3 is lowered under the action of the gravity of the goods and the cable payout of the winch; the cable 11 passes through the inside of the second installation arc plate 44 and is located between the second auxiliary guide wheel 441 and the third auxiliary guide wheel 442. When the cable 11 moves, the movable plate 322 moves under the vertical gravity pull of the cable 11. At this time, the toothed plate 3222 provided at the lower end of the movable plate 322 is engaged with the surface of the lower toothed disk 432, and the toothed disk 432 rotates. When the movable plate 322 is quickly moved inward, the anti-disengagement cross bar 3221 triggers the touch switch 3231 inside, so as to quickly trigger the driving assembly and quickly adjust the bending radius of the cable 11; when the linkage motor 411 is triggered, its output shaft rotates and provides driving force to the first bevel gear 412. At this time, the first bevel gear 412 rotates and drives the two bevel gears 413 on both sides to mesh, and the threaded rod 414 rotates and is threadedly engaged with one end of the hollow movable rod 42. The hollow movable rod 42 is limited by the dual actions of the threaded engagement and the side groove 410, so that the two first installation arc plates 43 move away from the position of the limit installation plate 4 and move to both sides at the same time. At this time, the first auxiliary guide wheel 431 moves on the surface of the cable 11 and pushes the cable 11 on both sides outward, increasing the bending radius of the section of the first installation arc plate 43 and the movable pulley 300, avoiding the sharp bending of the cable 11. And at this time, after the cable 11 is pushed outwards, it tends to be in a straightened state with the cable clamped between the second auxiliary guide wheel 441 and the third auxiliary guide wheel 442 at the upper end. In this way, the first installation arc plate 43 and the second installation arc plate 44 will not be staggered to cause wear of the cable 11, and the normal operation of the cable 11 can be maintained.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship crane cable limiting structure, comprising a crane boom (1) and a cable (11), wherein one end of the crane boom (1) is fixedly connected to a lifting plate (2), one end of the crane boom (1) is provided with a winch, one end of the cable (11) is connected to the winch, and the outer surface of the cable (11) is respectively provided with a directional guide wheel 1 (12), a directional guide wheel 2 (13) and a directional guide wheel 3 (14), characterized in that: Inside the center of the lifting plate (2), there is a sheet metal vertical plate (21) fixedly connected to one end of the crane boom (1). The second directional guide wheel (13) and the third directional guide wheel (14) are respectively arranged on both sides of the sheet metal vertical plate (21). Below the sheet metal vertical plate (21), there is a hook assembly (3). The hook assembly (3) includes a movable pulley (300) and a connecting member. The connecting member includes a lifting hook member (31) and a connecting cross plate (32). On the upper inner wall of the hook assembly (3), there is a square notch (30). On the inner surface of the square notch (30), a limit mounting plate (4) is fixedly installed. On the limit mounting plate (4), there is a bending radius adjusting mechanism. The bending radius adjusting mechanism includes a driving assembly, a hollow fixed arm cylinder (41), a hollow movable rod (42), and a mounting arc plate one (43). At both ends of the connecting cross plate (32), there are respectively fixedly connected parallel end plates (321). The connecting cross plate (32) and the parallel end plates (321) jointly form a "C"-shaped plate-like structure with an upward opening. On the upper side of the parallel end plates (321), there is a limit walking assembly. The limit walking assembly includes a movable plate (322). The outer surface of the movable plate (322) is slidably connected to the upper inner wall of the parallel end plate (321). One end of the movable plate (322) is fixedly connected with an anti-disengagement cross bar (3221). At the end of the movable plate (322) far from the anti-disengagement cross bar (3221), there is a toothed plate (3222). Inside the anti-disengagement cross bar (3221), there is a connecting rib plate (323). The connecting rib plate (323) is fixedly installed on the outer surface of the parallel end plate (321). In the middle section of the connecting rib plate (323), there is a touch switch (3231) correspondingly installed. The movable plate (322) is composed of two groups of parallel J-shaped plates. Inside the two groups of parallel J-shaped plates, there is a fixedly connected mounting arc plate two (44). On the inner surface of the mounting arc plate two (44), there are movably connected an auxiliary guide wheel two (441) and an auxiliary guide wheel three (442). Between the mounting arc plate two (44) and the inner side of the parallel end plate (321), there is an elastic member. The elastic member includes an elastic member (45) and a limit sleeve (451). The two ends of the elastic member (45) and the limit sleeve (451) are respectively fixedly connected to the outer surfaces of the mounting arc plate two (44) and the parallel end plate (321). The elastic member (45) is slidably sleeved on the outer side of the limit sleeve (451).

2. A ship crane cable limiting structure according to claim 1, characterized in that: The lifting hook member (31) is movably installed at the lower end of the hook assembly (3), and the connecting cross plate (32) is fixedly installed at the upper end of the hook assembly (3).

3. A ship crane cable limiting structure according to claim 1, characterized in that: The driving assembly comprises a linkage motor (411), the linkage motor (411) being fixedly mounted on an outer surface of one side of the limit mounting plate (4), the output end of the linkage motor (411) being electrically connected to the touch switch (3231), a bevel gear 1 (412) being fixedly connected to the output shaft of the linkage motor (411), bevel gear 2 (413) being meshed and rotatably engaged on the outer surfaces of both sides of the bevel gear 1 (412), and the bevel gear 2 (413) being provided with Two groups are symmetrically distributed about the central axis of the bevel gear one (412); the central inner surfaces of the two groups of bevel gear two (413) are respectively fixedly connected with threaded rods (414); the outer surfaces of the threaded rods (414) are rotatably connected to the inner wall of the hollow fixed arm tube (41); a limiting pad (415) is fixedly provided at one end of the threaded rod (414) away from the bevel gear two (413); the diameter of the limiting pad (415) is larger than the diameter of the threaded rod (414).

4. A ship crane cable limiting structure according to claim 3, characterized in that: A central slide groove is provided on the inner wall of the hollow fixed arm tube (41), and side grooves (410) are respectively provided on both sides of the central slide groove. The inner surface of the central slide groove is slidably connected to the outer surface of the hollow movable rod (42), and the inner wall of one end of the hollow movable rod (42) is threadedly connected to the outer surface of the threaded rod (414). A sliding side block (421) is fixedly connected to one end of the hollow movable rod (42), and the outer surface of the sliding side block (421) is slidably connected to the inner wall of the side groove (410).

5. A ship crane cable limiting structure according to claim 4, characterized in that: One end of the hollow movable rod (42) away from the sliding edge block (421) is fixedly connected to the outer surface of the mounting arc plate (43); an auxiliary guide wheel (431) is arranged on the inner side of the mounting arc plate (43); toothed discs (432) are respectively arranged on the outer surfaces of both sides of the mounting arc plate (43); the toothed discs (432) are rotatably mounted on both sides of the mounting arc plate (43); and the outer surface of the toothed disc (432) is adapted to mesh with the outer surface of the toothed plate (3222).

6. A ship crane cable limiting structure according to claim 5, characterized in that: An auxiliary lubrication component is provided at the connection between the hollow movable rod (42) and the mounting arc plate (43), the auxiliary lubrication component comprising a mounting cylinder (422), the mounting cylinder (422) being of a hollow cylindrical structure, an oil storage bag (4221) being provided in the inner cavity of the mounting cylinder (422), an oil nozzle (4222) being provided at the output end of the oil storage bag (4221), a circular groove (4220) being provided at one end of the mounting cylinder (422) close to the hollow movable rod (42), and an outer surface of the oil storage bag (4221) being in movably contact with an outer surface of a limiting cushion block (415).

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