Crane cable pulley

Abstract

A crane cable pulley belongs to the technical field of cable pulleys. The device comprises a pulley frame, a mounting plate is fixedly connected to the bottom of the pulley frame, a first mounting frame is fixedly connected to the bottom of the mounting plate, a connecting anti-abrasion mechanism is arranged on the inner wall of the mounting plate, a fixing frame is fixedly connected to the inner wall of the first mounting frame, and a connecting frame is fixedly connected to the bottom of the fixing frame; a rotating shaft is fixedly connected to the side wall of the connecting frame in a penetrating mode, two arc-shaped supporting plates are rotationally connected to the outer wall of the rotating shaft, limiting anti-clamping mechanisms are arranged on the corresponding side walls between the first mounting frame and the connecting frame, and each connecting anti-abrasion mechanism comprises two L-shaped plates arranged on the inner wall of the corresponding mounting plate and is connected with the adjacent tackles in a relative moving mode after extrusion clamping. And a synchronous folding mechanism is arranged at the bottom of the L-shaped plate, the distance is shortened through relative displacement of the first connecting blocks on the inner walls of the two arc-shaped supporting plates, the folding angle of cable supporting is dynamically adjusted, and the functions of abrasion prevention and cable protection are considered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable trolley, in particular to a crane cable trolley. BACKGROUND

[0002] The crane refers to the multi-action hoisting machinery for vertically lifting and horizontally transporting heavy objects within a certain range, and the working characteristic is intermittent movement, that is, the corresponding mechanisms for taking material, moving, unloading and other actions in a working cycle are alternately worked. The crane is more and more widely used in the market, and the bridge crane is the most widely used and largest quantity of hoisting machinery. The bridge crane is horizontally arranged above the workshop, warehouse and material yard to hoist and transport materials, and is placed at the both ends of high concrete columns or metal supports, and has a shape like a bridge.

[0003] The cable trolley system in the crane is a cable suspension and traction system specially designed for mobile power supply equipment such as crane trolley. It is composed of running wheels, supports and supporting plates, and is mainly used for safely and flexibly laying and moving power supply cables on I-beam tracks. The core function is to realize the linkage of the cable and the mobile equipment through mechanical synchronization to avoid the wear of the cable caused by dragging the ground.

[0004] Since the length of the cable needs to be consistent with the movable distance of the crane trolley, multiple cable trolleys need to be used at the same time to reasonably distribute the cable. However, after the crane trolley completes a transport, the crane trolley is reset to the starting point. Since no limiting measures are provided between the cable trolley systems, the multiple trolleys will gradually approach and stick together. In this process, the multiple trolleys will collide and rub, which can easily cause structural deformation of the trolley, affect the hoisting accuracy, and even cause the trolley to derail and lose control, causing equipment downtime. At the same time, the approaching process between the trolleys can also cause the cable fixed on the supporting plate to be bent at too large an angle, causing the outer skin of the cable to be damaged, the internal wires to be exposed, and the risk of short circuit or electric shock. SUMMARY

[0005] The present application aims to solve the problems in the background art and provides a crane cable trolley.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a crane cable trolley, comprising a trolley frame, a mounting plate fixedly connected to the bottom of the trolley frame, a first mounting frame fixedly connected to the bottom of the mounting plate, a connecting wear-prevention mechanism arranged on the inner wall of the mounting plate, a fixed frame fixedly connected to the inner wall of the first mounting frame, a connecting frame fixedly connected to the bottom of the fixed frame, a rotating shaft fixedly connected through the side wall of the connecting frame, two arc-shaped supporting plates rotatably connected to the outer wall of the rotating shaft, a limiting anti-jamming mechanism arranged on the corresponding side walls between the first mounting frame and the connecting frame, and a plurality of pulleys fixedly installed in the trolley frame.

[0007] The connecting anti-abrasion mechanism comprises two L-shaped plates arranged on the inner wall of the mounting plate, and the two L-shaped plates are relatively moved after being clamped by extrusion, thereby connecting the adjacent trolleys and preventing friction therebetween.

[0008] The bottom of the L-shaped plate is provided with a synchronous folding mechanism, which comprises two corresponding first connecting blocks arranged on the inner wall of the two arc-shaped supporting plates, and the two first connecting blocks are relatively displaced to shorten the distance therebetween, thereby changing the folding angle of the two arc-shaped supporting plates for supporting the cable.

[0009] The limiting anti-clamping mechanism comprises a second connecting block arranged on the outer wall of the arc-shaped supporting plate, and the second connecting block is moved by following the overturning of the arc-shaped supporting plate, thereby always limiting the position of the cable.

[0010] Further, the first spring is fixedly connected between the two L-shaped plates, the side wall of the L-shaped plate is provided with a clamping groove, the end of the L-shaped plate away from the clamping groove is fixedly connected with a clamping block, the inner wall of the clamping block is slidably connected with a protruding block, and the second spring is fixedly connected between the opposite sides of the two protruding blocks.

[0011] Further, the outer wall of the two L-shaped plates is slidably connected to the inner wall of the mounting plate, the port direction of the two adjacent L-shaped plates is oppositely arranged, and the outer wall of the protruding block corresponds to the inner wall of the clamping groove.

[0012] Further, the synchronous folding mechanism comprises a movable column, the outer wall of the movable column is slidably connected to the inside of the first mounting frame, the end of the movable column is rotatably connected with two first hinged rods, the end of the movable column away from the first hinged rod is fixedly connected with a fixed plate, both ends of the fixed plate are rotatably connected with second hinged rods, and the end of the second hinged rod away from the fixed plate is rotatably connected to the outer wall of the corresponding first connecting block.

[0013] Further, the outer wall of the movable column is slidably connected to the inside of the fixed frame, the end of the two first hinged rods away from the movable column is rotatably connected to the bottom of the corresponding L-shaped plate, and the outer wall of the two first connecting blocks is fixedly connected to the inner wall of the corresponding arc-shaped supporting plate.

[0014] Further, the limiting anti-blocking mechanism comprises a plurality of second mounting frames, the outer wall of each of the plurality of second mounting frames is fixedly connected with a connecting shaft, one end of the connecting shaft away from the second mounting frame is fixedly connected with the outer wall of the second connecting block, the outer wall of the second connecting block is fixedly connected with the outer wall of the arc-shaped supporting plate, the corresponding side walls of the first mounting frame and the connecting frame are both provided with mounting grooves, and the end portions of the plurality of second mounting frames are rotatably connected with the side walls of the corresponding mounting grooves.

[0015] Further, the inner wall of the fixing frame is slidably connected with a reinforcing plate, and the top of the reinforcing plate is rotatably connected with a threaded rod, and the threaded rod is rotatably connected with the inside of the fixing frame through threads.

[0016] Further, the top of the fixing frame is rotatably connected with a knob, and the knob is rotatably connected with the outer wall of the threaded rod through threads.

[0017] Compared with the prior art, the above-mentioned scheme has the following beneficial effects:

[0018] 1. After the two protrusions are extruded, they will slide relatively into the interior of the clamping block. Then the protrusions limit the clamping block in the interior of the clamping groove. Then during the next transportation, the protrusions are extruded again by the cables driving the trolleys away from each other, and then the clamping block will be separated from the interior of the clamping groove, thereby canceling the connection between the trolleys. At this time, the two groups of trolleys are connected together through the corresponding L-shaped plates. The two groups of trolleys form an integral structure after the clamping of the protrusions and the clamping grooves. During the displacement process of the trolleys, no relative displacement occurs, which fundamentally avoids collision and shaking. The risk of collision or friction after the trolleys are attached together is avoided, which leads to the deformation of the trolley structure and affects the positioning of the trolley. At the same time, the service life of the trolley is improved by reducing wear and tear.

[0019] 2. The end of the first hinged rod is displaced by the sliding of the L-shaped plate, the other end of the two second hinged rods is close to each other, which drives the corresponding arc-shaped supporting plate to rotate around the pivot, and the angle between the two arc-shaped supporting plates gradually decreases during the process. At this time, the fixed cable on the surface will sag with the rotation of the arc-shaped supporting plate, which will increase the space between the arc-shaped supporting plate and the adjacent arc-shaped supporting plate, thereby relieving the angle of the supported cable bending, reducing the damage of the cable during the continuous bending process of the cable during the operation of the crane, and improving the service life of the cable.

[0020] 3. During the process of flipping the two arc-shaped support plates with the rotating shaft as the axis, the outer wall of the arc-shaped support plate will also drive the second connecting block to move synchronously, and then the distance between the second connecting block and the second mounting bracket will become farther, thereby automatically lengthening the length of the connecting shaft. The connection at both ends of the connecting shaft can provide a limit for the cable on the surface of the arc-shaped support plate. By expanding the limit range of the direction of the cable, the situation in which the cable is prone to lateral folding during the bending process is eliminated, which causes the risk of the lateral folded cable driving the corresponding pulley to deviate in direction and easily fall off the track, thereby further improving the stability of the crane during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the structural transmission connecting the anti-wear mechanism and the arc-shaped support plate proposed in the present invention;

[0023] Figure 3 This is a schematic diagram of the structural transmission of the L-shaped plate and movable column proposed in the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the L-shaped plate proposed in the present invention;

[0025] Figure 5 A schematic diagram of the structural connection between the L-shaped plate and the second hinged rod proposed in the present invention;

[0026] Figure 6 This is a schematic diagram of the structural transmission of the movable column and connecting shaft proposed in the present invention.

[0027] The marks in the accompanying drawings are: 1. pulley frame; 2. mounting plate; 3. first mounting frame; 4. connecting anti-wear mechanism; 5. fixing frame; 6. synchronous folding mechanism; 7. connecting frame; 8. rotating shaft; 9. arc-shaped support plate; 10. position limiting and anti-stuck mechanism; 11. reinforcement plate; 12. threaded rod; 13. knob; 14. pulley; 401. L-shaped plate; 402. first spring; 403. slot; 404. block; 405. protrusion; 406. second spring; 601. movable column; 602. first hinged rod; 603. fixing plate; 604. second hinged rod; 605. first connecting block; 1001. mounting slot; 1002. second mounting frame; 1003. connecting shaft; 1004. second connecting block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "top surface", "bottom surface" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only used to distinguish entities or operations from each other, and do not require or imply any actual relationship, order or relative importance between them.

[0030] Embodiment one, please refer to Figures 1-4 A crane cable trolley, comprising a trolley frame 1, a mounting plate 2 is fixedly connected to the bottom of the trolley frame 1, and a first mounting frame 3 is fixedly connected to the bottom of the mounting plate 2, a connecting wear-prevention mechanism 4 is arranged on the inner wall of the mounting plate 2, a fixed frame 5 is fixedly connected to the inner wall of the first mounting frame 3, a connecting frame 7 is fixedly connected to the bottom of the fixed frame 5, a rotating shaft 8 is fixedly connected through the side wall of the connecting frame 7, two arc-shaped supporting plates 9 are rotatably connected to the outer wall of the rotating shaft 8, a limiting anti-jamming mechanism 10 is arranged on the corresponding side wall between the first mounting frame 3 and the connecting frame 7, a reinforcing plate 11 is slidably connected to the inner wall of the fixed frame 5, a threaded rod 12 is rotatably connected to the top of the reinforcing plate 11, the threaded rod 12 is rotatably connected to the inside of the fixed frame 5 through threads, a knob 13 is rotatably connected to the outer wall of the threaded rod 12, and a plurality of pulleys 14 are fixedly installed in the inside of the trolley frame 1;

[0031] Further, the connecting wear-prevention mechanism 4 comprises two L-shaped plates 401 arranged on the inner wall of the mounting plate 2, the two L-shaped plates 401 are relatively moved after being pressed and clamped, connecting adjacent trolleys to prevent friction therebetween, a first spring 402 is fixedly connected between the two L-shaped plates 401, a clamping groove 403 is formed in the side wall of the L-shaped plate 401, a clamping block 404 is fixedly connected to the end of the L-shaped plate 401 away from the clamping groove 403, a protruding block 405 is slidably connected through the inner wall of the clamping block 404, a second spring 406 is fixedly connected between the opposite sides of the two protruding blocks 405, the outer walls of the two L-shaped plates 401 are slidably connected to the inner wall of the mounting plate 2, the port directions of the two adjacent L-shaped plates 401 are oppositely arranged, and the outer wall of the protruding block 405 corresponds to the inner wall of the clamping groove 403;

[0032] More specifically, the plurality of cable trolleys are installed on the crane I-beam track, and the cable is passed through the inside of the plurality of trolley fixing frames 5 below the reinforcing plate 11, and then connected to the crane trolley circuit, and then the cable is arranged and distributed, and then rotated by controlling the knob 13. Since the threaded rod 12 is threadedly connected with the knob 13, the rotation of the knob 13 drives the threaded rod 12 to move downward along the inside of the fixing frame 5, and the threaded rod 12 drives the reinforcing plate 11 to slide along the inner wall of the fixing frame 5. The bottom of the reinforcing plate 11 contacts and extrudes the outer wall of the cable, thereby fixing the trolley and the cable. Since the threaded transmission between the threaded rod 12 and the knob 13 has self-locking property, the operation is simple and stable.

[0033] In the process of using the crane to realize the vertical lifting and horizontal movement of heavy objects, a plurality of trolleys are needed to move on the I-beam track, and the position of the cable for powering the crane trolley is distributed. The positions of the plurality of trolleys gradually move away from each other, and then gradually move closer to each other during the process of returning to the starting point after completing a transportation. When the two adjacent trolleys touch each other;

[0034] First, the L-shaped plate 401 contacts the L-shaped plate 401 in the other trolley, and then the end portion is attached and slides, and then the outer wall of the clamping block 404 at the end portion slides into the inner wall of the corresponding clamping groove 403. Then the inner wall of the clamping groove 403 extrudes the outer wall of the two protruding blocks 405 on the surface of the clamping block 404. At this time, the two protruding blocks 405 are relatively slid into the interior of the clamping block 404 after being extruded, and the second spring 406 is compressed. When the protruding blocks 405 are completely slid into the interior of the clamping block 404, the clamping block 404 quickly enters the interior of the clamping groove 403 at this time. Then the elastic force of the second spring 406 drives the two protruding blocks 405 to pop out. At this time, the clamping block 404 is limited in the interior of the clamping groove 403 by the protruding blocks 405. Then the protruding blocks 405 are extruded again during the next transportation to drive the trolleys away from each other, and then the clamping block 404 is separated from the interior of the clamping groove 403 to cancel the connection between the trolleys. At this time, the two trolleys are connected by the corresponding L-shaped plates 401, and the two trolleys form a whole structure after the clamping of the clamping block 404 and the clamping groove 403. The displacement process of the trolleys does not produce relative displacement, which fundamentally avoids collision and shaking, avoids the risk of collision or friction after the trolleys are attached together, and affects the positioning of the trolley. At the same time, the service life of the trolley is improved by reducing wear and tear.

[0035] Embodiment two, please refer to Figures 1-5On the basis of embodiment one, in the embodiment, the bottom of the L-shaped plate 401 is provided with a synchronous folding mechanism 6, the synchronous folding mechanism 6 comprises two corresponding first connecting blocks 605 arranged on the inner walls of the two arc-shaped supporting plates 9, the two first connecting blocks 605 are relatively displaced to shorten the distance therebetween, and the folding angle of the two arc-shaped supporting plates 9 to the cable support is changed;

[0036] Further, the synchronous folding mechanism 6 comprises a movable column 601, the outer wall of the movable column 601 is slidingly connected in the interior of the first mounting frame 3, the end of the movable column 601 is rotatably connected with two first hinged rods 602, the end of the movable column 601 away from the first hinged rods 602 is fixedly connected with a fixed plate 603, the two ends of the fixed plate 603 are rotatably connected with second hinged rods 604, and the ends of the second hinged rods 604 away from the fixed plate 603 are rotatably connected with the outer walls of the corresponding first connecting blocks 605, the outer wall of the movable column 601 is slidingly connected in the interior of the fixed frame 5, the ends of the two first hinged rods 602 away from the movable column 601 are rotatably connected with the bottoms of the corresponding L-shaped plates 401, and the outer walls of the two first connecting blocks 605 are fixedly connected with the inner walls of the corresponding arc-shaped supporting plates 9;

[0037] More specifically, after the connection of the two groups of L-shaped plates 401 is completed, then the mutual approaching and extruding process between the groups of pulleys makes the L-shaped plates 401 on the two sides of the first spring 402 slide relatively close along the inner wall of the mounting plate 2, and at the same time the first spring 402 is compressed, in the process of sliding of the L-shaped plates 401, the end of the corresponding first hinged rod 602 is synchronously displaced, at this time the ends of the two first hinged rods 602 brought by the driving are close to each other, the other ends of the two first hinged rods 602 drive the movable column 601 to slide downward along the interior of the first mounting frame 3, at the same time the movable column 601 drives the fixed plate 603 at the bottom thereof to move synchronously, then the fixed plate 603 drives the ends of the two second hinged rods 604 to displace, the other ends of the two second hinged rods 604 are close to each other, then the first connecting blocks 605 drive the corresponding arc-shaped supporting plates 9 to rotate around the pivot 8, in the process the angle between the two arc-shaped supporting plates 9 gradually decreases, at this time the cables fixed on the surfaces thereof follow the rotation of the arc-shaped supporting plates 9 to sag, the space between the arc-shaped supporting plate 9 and the adjacent other arc-shaped supporting plate 9 becomes larger, so as to relieve the angle of the cable being supported and bent, reduce the damage of the cable in the process of being continuously bent during the operation of the crane, improve the service life of the cable, and at the same time cooperate with the clamping connection between the pulleys to make the position of the cable in the bending process not deviate.

[0038] Embodiment three, please refer to Figures 1-6On the basis of embodiment two, in this embodiment, the limiting anti-blocking mechanism 10 includes a second connecting block 1004 arranged on the outer wall of the arc-shaped support plate 9, which moves by following the overturning of the arc-shaped support plate 9, and always limits the position of the cable;

[0039] Further, the limiting anti-blocking mechanism 10 includes a plurality of second mounting frames 1002, the outer wall of each of the plurality of second mounting frames 1002 is fixedly connected with a connecting shaft 1003, one end of the connecting shaft 1003 away from the second mounting frame 1002 is fixedly connected to the outer wall of the second connecting block 1004, the outer wall of the second connecting block 1004 is fixedly connected to the outer wall of the arc-shaped support plate 9, the corresponding side walls of the first mounting frame 3 and the connecting frame 7 are both provided with mounting grooves 1001, and the end portions of the plurality of second mounting frames 1002 are rotatably connected to the side walls of the corresponding mounting grooves 1001.

[0040] More specifically, in the process of overturning of the two arc-shaped support plates 9 around the pivot 8, the outer wall of the arc-shaped support plate 9 also drives the second connecting block 1004 to move synchronously, and at the same time drives the second mounting frame 1002 to rotate on the inner wall of the mounting groove 1001 through the connecting shaft 1003, then the distance between the second connecting block 1004 and the second mounting frame 1002 becomes farther, thereby the length of the connecting shaft 1003 is automatically elongated, through the connecting shaft 1003 always connecting between the arc-shaped support plate 9 and the first mounting frame 3, the cable on the surface of the arc-shaped support plate 9 can be limited, by expanding the limiting range of the direction of the cable, the situation that the cable is easily folded horizontally in the process of being bent is eliminated, the risk that the horizontally folded cable drives the corresponding trolley to deviate in direction and easily deviates from the track is eliminated, and the stability of the crane in use is further improved.

[0041] The working principle of the present application is: the cable passes through the inside of the fixing frame 5 of the plurality of trolleys and is located below the reinforcing plate 11, then is connected in circuit with the crane trolley, after the cable is arranged and distributed, the control knob 13 is rotated, which drives the threaded rod 12 to move downward along the inside of the fixing frame 5, and the threaded rod 12 drives the reinforcing plate 11 to slide along the inner wall of the fixing frame 5, then the bottom of the reinforcing plate 11 contacts the outer wall of the cable and extrudes it, thereby fixing the trolley and the cable;

[0042] After a transport is completed, the positions of the multiple pulleys will gradually approach each other during the process of the crane trolley returning to the starting point. During this process, when two adjacent pulleys come into contact, the L-shaped plate 401 contacts the L-shaped plate 401 in the other pulley, and then its ends will fit and slide. Then the outer wall of the block 404 at its end will slide to the inner wall of the corresponding slot 403, and then the inner wall of the slot 403 will squeeze the outer walls of the two protrusions 405 protruding from the surface of the block 404. At this time, the two protrusions 405 will be squeezed and move into the inside of the block 404. When the protrusion 405 completely slides into the inside of the clamping block 404, the clamping block 404 will quickly enter the inside of the clamping groove 403, and then the elastic force of the second spring 406 will drive the two protrusions 405 to pop out into the inside of the clamping groove 403. At this time, the two groups of pulleys are connected together by the corresponding L-shaped plates 401. After the protrusions 405 are locked in the clamping groove 403, the two groups of pulleys form an integral structure. The subsequent displacement process of the pulleys will not produce relative displacement, fundamentally avoiding collision and shaking, and avoiding the risk of collision or friction after the pulleys are attached together;

[0043] After the two groups of L-shaped plates 401 are connected, the multiple groups of pulleys are squeezed together, causing the L-shaped plates 401 on both sides of the first spring 402 to slide relatively close to each other along the inner wall of the mounting plate 2. During the sliding of the L-shaped plates 401, one end of the corresponding first hinged rod 602 will be driven to move synchronously. At this time, the driven ends of the two first hinged rods 602 are close to each other, so that the other ends drive the movable column 601 to slide downward along the inside of the first mounting frame 3. Then the fixed plate 603 drives the other ends of the second hinged rods 604 on both sides to approach each other, and then drives the corresponding arc-shaped support plates 9 to rotate around the rotating shaft 8 through the first connecting block 605. During the process, the angle formed between the two arc-shaped support plates 9 will gradually decrease. At this time, the cables fixed on the surface will sag with the rotation of the arc-shaped support plates 9, so that the space between the arc-shaped support plates 9 and the other adjacent group of arc-shaped support plates 9 will be increased, thereby alleviating the angle of the supported bending of the cables, reducing the damage to the cables during the continuous bending during the operation of the crane, and improving the service life of the cables.

[0044] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0045] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A crane cable pulley, comprising a pulley frame (1), characterized in that: The bottom of the pulley frame (1) is fixedly connected to a mounting plate (2), and the bottom of the mounting plate (2) is fixedly connected to a first mounting frame (3), the inner wall of the mounting plate (2) is provided with a connection anti-wear mechanism (4), the inner wall of the first mounting frame (3) is fixedly connected to a fixing frame (5), the bottom of the fixing frame (5) is fixedly connected to a connecting frame (7), and the side wall of the connecting frame (7) is fixedly connected to a rotating shaft (8), the outer wall of the rotating shaft (8) is rotatably connected to two arc-shaped support plates (9), the corresponding side walls between the first mounting frame (3) and the connecting frame (7) are provided with a limited anti-stuck mechanism (10), and a plurality of pulleys (14) are fixedly installed inside the pulley frame (1).

2. The connection anti-wear mechanism (4) comprises two L-shaped plates (401) arranged on the inner wall of the mounting plate (2). The two L-shaped plates (401) move relative to each other after being squeezed and locked, connecting adjacent pulleys to prevent friction between them; A synchronous folding mechanism (6) is provided at the bottom of the L-shaped plate (401), and the synchronous folding mechanism (6) comprises two corresponding first connecting blocks (605) provided on the inner walls of the two arc-shaped support plates (9). The two first connecting blocks (605) are relatively displaced to shorten the distance between them, thereby changing the folding angle of the two arc-shaped support plates (9) supporting the cable; The position limiting and anti-jamming mechanism (10) comprises a second connecting block (1004) arranged on the outer wall of the arc-shaped support plate (9), which moves following the flipping of the arc-shaped support plate (9) to always limit the position of the cable.

3. The crane cable pulley according to claim 1, characterized in that: A first spring (402) is fixedly connected between the two L-shaped plates (401), a slot (403) is provided on the side wall of the L-shaped plate (401), a clamping block (404) is fixedly connected to one end of the L-shaped plate (401) away from the slot (403), a protrusion (405) is slidably connected to the inner wall of the protrusion (404), and a second spring (406) is fixedly connected between opposite sides of the two protrusions (405).

4. A crane cable pulley according to claim 2, characterized in that: The outer walls of the two L-shaped plates (401) are slidably connected to the inner wall of the mounting plate (2), the port directions of the two adjacent L-shaped plates (401) are arranged in opposite directions, and the outer wall of the protrusion (405) corresponds to the inner wall of the slot (403).

5. The crane cable pulley according to claim 3, characterized in that: The synchronous folding mechanism (6) comprises a movable column (601), the outer wall of the movable column (601) is slidably connected to the interior of the first mounting frame (3), the end of the movable column (601) is rotatably connected to two first hinged rods (602), the end of the movable column (601) away from the first hinged rod (602) is fixedly connected to a fixed plate (603), both ends of the fixed plate (603) are rotatably connected to second hinged rods (604), and the end of the second hinged rod (604) away from the fixed plate (603) is rotatably connected to the outer wall of the corresponding first connecting block (605).

6. The crane cable pulley according to claim 4, characterized in that: The outer wall of the movable column (601) is slidably connected to the interior of the fixed frame (5), and the ends of the two first hinged rods (602) away from the movable column (601) are both rotatably connected to the bottom of the corresponding L-shaped plate (401), and the outer walls of the two first connecting blocks (605) are fixedly connected to the inner walls of the corresponding arc-shaped support plates (9).

7. The crane cable pulley according to claim 5, characterized in that: The position limiting and anti-stuck mechanism (10) comprises a plurality of second mounting frames (1002), the outer walls of the plurality of second mounting frames (1002) are fixedly connected to a connecting shaft (1003), one end of the connecting shaft (1003) away from the second mounting frame (1002) is fixedly connected to the outer wall of the second connecting block (1004), the outer wall of the second connecting block (1004) is fixedly connected to the outer wall of the arc-shaped support plate (9), the corresponding side walls of the first mounting frame (3) and the connecting frame (7) are provided with mounting grooves (1001), and the ends of the plurality of second mounting frames (1002) are rotatably connected to the corresponding side walls of the mounting grooves (1001).

8. The crane cable pulley according to claim 6, characterized in that: The inner wall of the fixing frame (5) is slidably connected to a reinforcement plate (11), and the top of the reinforcement plate (11) is rotatably connected to a threaded rod (12), and the threaded rod (12) is rotatably connected to the interior of the fixing frame (5) through a threaded penetration.

9. The crane cable pulley according to claim 7, characterized in that: The top of the fixing frame (5) is rotatably connected to a knob (13), and the knob (13) is rotatably connected to the outer wall of the threaded rod (12) via a thread.

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