Specialized spreader for port lifting machinery

Abstract

The present invention relates to the technical field of lifting components for port cranes. Provided is a specialized spreader for port lifting machinery, comprising: a container lifting frame, which is a rectangular frame body formed by assembling lifting frame cross beams, lifting frame vertical beams, a cross beam connecting frame and a vertical beam connecting plate, wherein the front end and the rear end of the cross beam connecting frame are fixedly connected to the front and rear lifting frame cross beams, respectively, the left end and the right end of the vertical beam connecting plate are fixedly connected to the lifting frame vertical beams at two sides, respectively, two U-shaped rotating shaft supports are mounted on the upper surface of the vertical beam connecting plate by means of bolts, and a locking trigger rotating shaft is rotatably connected above the vertical beam connecting plate. The specialized spreader has the functions of automatically docking with containers and separating from containers. Compared with the traditional method of using a driving member to control the separating and grabbing actions of a spreader, a driving electric motor and a power connection cable are omitted, which reduces the failure rate of an apparatus, the burden of maintenance and service of the apparatus, the total weight of the spreader, the operating load of the lifting machinery, and the energy consumption.

Description

Special lifting appliance for port hoisting machinery TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting parts of port cranes, and particularly relates to a special lifting appliance for port hoisting machinery. BACKGROUND

[0002] In traditional sea transportation, containers are used as transfer containers for goods, and special hoisting machinery is used to transfer the containers. In order to improve the stability of hoisting of the containers, a special container lifting appliance is needed to clamp and fix the containers, so as to ensure that the containers do not tilt or fall during hoisting.

[0003] In a conventional container lifting appliance for hoisting machinery, the lifting head of the lifting appliance is inserted into an oval-shaped socket at the top of the container and rotated to lock the container by means of an electric control mechanical device. The lifting appliance needs to be connected to a power source through an electric connection line or use a self-contained mobile power supply to provide power for the lifting appliance, and a driving mechanism needs to be installed in the lifting appliance. This greatly increases the weight of the lifting appliance, increases the energy consumption of the hoisting machinery, and accelerates the damage of the power line, power supply and driving mechanism in a humid port environment, increasing the burden of maintenance and maintenance work of the equipment.

[0004] SUMMARY

[0005] The present application relates to a special lifting appliance for port hoisting machinery, to solve the problem that in a conventional container lifting appliance for hoisting machinery, the lifting head of the lifting appliance is inserted into an oval-shaped socket at the top of the container and rotated to lock the container by means of an electric control mechanical device. The lifting appliance needs to be connected to a power source through an electric connection line or use a self-contained mobile power supply to provide power for the lifting appliance, and a driving mechanism needs to be installed in the lifting appliance. This greatly increases the weight of the lifting appliance, increases the energy consumption of the hoisting machinery, and accelerates the damage of the power line, power supply and driving mechanism in a humid port environment, increasing the burden of maintenance and maintenance work of the equipment.

[0006] The first aspect of the present disclosure provides a special lifting tool for port hoisting machinery, specifically comprising: a container lifting frame formed by a rectangular frame body spliced by a lifting frame cross beam, a lifting frame vertical beam, a cross beam connecting frame and a vertical beam connecting plate, the front end and the rear end of the cross beam connecting frame are fixedly connected with the front and rear lifting frame cross beams respectively, the left end and the right end of the vertical beam connecting plate are fixedly connected with the two sides of the lifting frame vertical beam respectively, the upper surface of the vertical beam connecting plate is provided with two "U"-shaped rotating shaft supports through bolts, a locking trigger rotating shaft is rotatably connected above the vertical beam connecting plate, the locking trigger rotating shaft is rotatably connected with the two rotating shaft supports through bearings, four top corner connecting lock frames are fixedly connected at the four top corners of the container lifting frame respectively, a control rotating shaft is rotatably connected inside each top corner connecting lock frame, a rotating plug is fixedly connected to the lower end of the control rotating shaft, a linkage synchronous rotating shaft is rotatably connected inside the lifting frame vertical beam through a bearing, a trigger lifting plate is connected with the locking trigger rotating shaft through interference fit, an adjusting pull frame is movably connected to the trigger lifting plate, an upper lock control pull rope is connected above the adjusting pull frame, two state display lamps are fixedly connected to the locking trigger rotating shaft, a mobile power supply is installed on the upper surface of the vertical beam connecting plate through screws, and the mobile power supply is located below the locking trigger rotating shaft.

[0007] Preferably, the top corner connecting lock frame is a rectangular shell with an opening on the inner side, the control rotating shaft is perpendicular to the lower surface of the top corner connecting lock frame, a rotating shaft limiting ring is welded on the control rotating shaft, the rotating shaft limiting ring is located inside the top corner connecting lock frame, a control shaft driven bevel gear is fixedly connected to the upper end of the control rotating shaft through interference fit, and a long strip-shaped butt joint plug is welded on the lower surface of the top corner connecting lock frame and arranged in parallel with the lifting frame cross beam.

[0008] Preferably, a rotating trigger ring is tightly sleeved on the locking trigger rotating shaft, two extrusion push blocks are fixedly connected to the outer surface of the rotating trigger ring, the angles of the two extrusion push blocks are different by ninety degrees, and a trigger shaft driving bevel gear is fixedly connected to each end of the locking trigger rotating shaft through interference fit.

[0009] Preferably, a synchronous shaft driven gear is fixedly connected to the middle of the linkage synchronous rotating shaft through interference fit, and a synchronous shaft driving gear is fixedly connected to each end of the linkage synchronous rotating shaft through interference fit.

[0010] Preferably, the locking trigger rotating shaft is connected and drives the two linkage synchronous rotating shafts through the meshing of the trigger shaft driving bevel gear and the synchronous shaft driven gear, and the linkage synchronous rotating shafts are connected and drive the two control rotating shafts through the meshing of the synchronous shaft driving gear and the control shaft driven bevel gear.

[0011] Preferably, the lower end of the rotating plug is provided with a tapered end, the top view of the rotating plug is in a rectangular shape, and the upper surface of the rotating plug is matched with the lower surface structure of the butt joint plug.

[0012] Preferably, the trigger hanging plate is in the shape of a right-angled isosceles triangle, and a slanting sliding groove is formed in the inside of the trigger hanging plate, the slanting sliding groove is parallel to the long side of the trigger hanging plate, and a linkage hook groove is formed at each end of the slanting sliding groove.

[0013] Preferably, the adjusting pull frame is a U-shaped frame, and an adjusting sliding pin is fixedly connected inside the adjusting pull frame, the adjusting sliding pin is slidingly connected inside the slanting sliding groove, a pull spring is fixedly connected to the upper end of the adjusting pull frame, and the upper end of the pull spring is fixedly connected to the lower end of the upper lock control pull rope.

[0014] Preferably, the upper end of the mobile power supply is fixedly connected to two normally-off dynamic combination buttons, the two normally-off dynamic combination buttons are located below the two extrusion push blocks respectively, the two normally-off dynamic combination buttons are electrically connected to the mobile power supply, and the two normally-off dynamic combination buttons are connected to the two state display lamps through electrical lines respectively.

[0015] Preferably, the state display lamp takes an LED lamp bead as a light source, the LED lamp beads of the two state display lamps are red and green respectively, the state display lamp panel is in the shape of an L-shaped structure, and the angles of the supporting rods between the two groups of state display lamps are different by ninety degrees.

[0016] The present application provides a special lifting appliance for port hoisting machinery, which has the following beneficial effects:

[0017] The port hoisting machinery in the present application connects the four top corners of the lifting appliance through four lifting ropes, controls the lifting motion of the lifting appliance through the hoisting machinery, controls the four rotating plugs to be inserted into the four rectangular butt joint holes of the container respectively when the lifting appliance and the container are butted, rotates the rotating plugs by ninety degrees through a lifting action and a series of transmission cooperation to trigger the rotating plugs, makes the rotating plugs be clamped in the container butt joint hole, makes the container and the lifting appliance be fixedly connected, has the function of automatically butting the container, and when the goods transfer is completed, the container is placed in the set area, the lifting appliance is removed, the control structure in the lifting appliance is triggered to make the rotating plugs rotate by ninety degrees in the opposite direction, aligns with the container butt joint, and makes the lifting appliance be stably separated from the top of the container, has the function of automatically separating the container.

[0018] In addition, a display structure is provided to indicate the docking and separation status of the spreader and the container. Two different colored status indicator lights are used to display the two statuses respectively. The display structure can show the rotation direction of the locking trigger shaft. The "L"-shaped status indicator light allows operators and observers to view from multiple directions, increasing the visibility range. The orientation of the rotary plug inside the container docking hole can be determined by the status indicator light, reducing the difficulty of judgment for the operator. The docking status of the spreader and the container can be judged more clearly visually, avoiding the situation where the container falls during the transfer due to the poor docking of the container and the spreader caused by misjudgment, thus improving the stability of container lifting and transportation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram:

[0022] Figure 1 shows a schematic diagram of the overall structure of this application;

[0023] Figure 2 shows a schematic diagram of the structure at the bottom of this application;

[0024] Figure 3 shows a schematic diagram of the structure of the rotary plug of this application in the container locked state;

[0025] Figure 4 shows a schematic diagram of the structure at the bottom of Figure 3 of this application;

[0026] Figure 5 shows a schematic diagram of the locking trigger shaft of this application;

[0027] Figure 6 shows a schematic diagram of the linkage synchronous rotating shaft of this application;

[0028] Figure 7 shows a schematic diagram of the structure of the control shaft of this application;

[0029] Figure 8 shows a schematic diagram of the structure of the triggering plate in the state where the spreader is separated from the container;

[0030] Figure 9 shows a schematic diagram of the structure of the triggering plate when the spreader of this application is docked with the container;

[0031] Figure 10 shows a partially enlarged structural schematic diagram of point A in Figure 1 of this application;

[0032] Figure 11 shows a partially enlarged structural schematic diagram of point B in Figure 2 of this application;

[0033] Figure 12 shows a partially enlarged structural schematic diagram of point C in Figure 5 of this application.

[0034] List of reference numerals in the attached diagram: 1. Container gantry; 101. Gantry crossbeam; 102. Gantry vertical beam; 103. Crossbeam connecting frame; 104. Vertical beam connecting plate; 105. Rotary shaft support; 2. Top corner connecting lock frame; 201. Control rotating shaft; 202. Rotary shaft limit ring; 203. Control shaft driven bevel gear; 204. Docking block; 3. Locking trigger rotating shaft; 301. Rotary trigger ring; 302. Pressing push block; 303. Trigger shaft driving bevel gear; 4. Linkage synchronous rotating shaft; 401. Synchronous shaft driven gear; 402. Synchronous shaft driving gear; 5. Rotary plug; 6. Trigger lifting plate; 601. Inclined slide groove; 602. Linkage hook groove; 7. Adjusting pull frame; 701. Adjusting sliding pin; 702. Tension spring; 8. Locking control pull rope; 9. Status indicator light; 10. Power supply; 1001. Normally closed / operated button. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: Please refer to Figures 1 to 12:

[0037] This invention proposes a special lifting device for port cranes, including: a container crane 1, which is a rectangular frame formed by splicing a crane crossbeam 101, a crane vertical beam 102, a crossbeam connecting frame 103, and a vertical beam connecting plate 104. The front and rear ends of the crossbeam connecting frame 103 are fixedly connected to the front and rear crane crossbeams 101, respectively. The left and right ends of the vertical beam connecting plate 104 are fixedly connected to the crane vertical beams 102 on both sides, respectively. Two "U"-shaped rotating shaft supports 105 are bolted to the upper surface of the vertical beam connecting plate 104. A locking trigger rotating shaft 3 is rotatably connected above the vertical beam connecting plate 104. The locking trigger rotating shaft 3 is rotatably connected to the two rotating shaft supports 105 through bearings. At each of the four corners of the packing hanger 1, a corner connecting lock 2 is fixedly connected. A control shaft 201 is rotatably connected inside the corner connecting lock 2. A rotating plug 5 is fixedly connected to the lower end of the control shaft 201. A linkage synchronous shaft 4 is rotatably connected inside the vertical beam 102 of the hanger through a bearing. A trigger plate 6 is connected to the locking trigger shaft 3 through an interference fit. An adjusting bracket 7 is movably connected to the trigger plate 6. A locking control pull rope 8 is connected above the adjusting bracket 7. Two status indicator lights 9 are fixedly connected to the locking trigger shaft 3. A mobile power supply 10 is installed on the upper surface of the vertical beam connecting plate 104 by screws. The mobile power supply 10 is located below the locking trigger shaft 3.

[0038] In this embodiment, the apex connecting lock frame 2 is a cuboid shell with an opening on the inner side. The control shaft 201 is perpendicular to the lower surface of the apex connecting lock frame 2. A shaft limiting ring 202 is welded onto the control shaft 201, and the shaft limiting ring 202 is located inside the apex connecting lock frame 2. The upper end of the control shaft 201 is fixedly connected to the driven bevel gear 203 of the control shaft through an interference fit. A strip-shaped docking block 204 is welded to the lower surface of the apex connecting lock frame 2. The docking block 204 is set parallel to the crossbeam 101 of the gantry. The shaft limiting ring 202 plays a limiting role and improves the axial force bearing capacity of the control shaft 201. The docking block 204 allows the docking block 204 to be inserted into the docking interface after the container gantry 1 is docked with the container, thereby improving the docking accuracy.

[0039] In this embodiment, the trigger plate 6 is a right-angled isosceles triangle. An inclined groove 601 is provided inside the trigger plate 6, parallel to the long side of the trigger plate 6. A linkage hook groove 602 is provided at each end of the inclined groove 601, bent towards the long side of the trigger plate 6. The adjusting bracket 7 is a U-shaped bracket, with an adjusting pin 701 fixedly connected inside. The adjusting pin 701 is slidably connected inside the inclined groove 601. A tension spring 702 is fixedly connected to the upper end of the adjusting bracket 7, and the lower end of the locking control rope 8 is fixedly connected to the upper end of the tension spring 702. As the lifting machinery controls the locking control rope 8 to rise and fall, the control... The adjusting bracket 7 slides at both ends inside the inclined slide groove 601. When the locking control rope 8 is in a slack state, the adjusting bracket 7 slides down to the bottom of the inclined slide groove 601. When the locking control rope 8 is pulled again, the adjusting bracket 7 moves up into the linkage hook groove 602 at the lower end of the inclined slide groove 601. As the locking control rope 8 is continuously pulled, the trigger plate 6 rotates 90 degrees, driving the locking trigger shaft 3 to rotate, thereby realizing the rotation control of the locking trigger shaft 3. After a single rotation, the orientation of the trigger plate 6 remains unchanged. The adjusting bracket 7 automatically slides down and resets by the gravity of the adjusting bracket 7, so that the control structure formed by the trigger plate 6 and the adjusting bracket 7 can be used continuously.

[0040] In this embodiment, a synchronous shaft driven gear 401 is fixedly connected to the middle of the linkage synchronous shaft 4 via an interference fit, and a synchronous shaft driving gear 402 is fixedly connected to each end of the linkage synchronous shaft 4 via an interference fit; the locking trigger shaft 3 is connected to and drives the two linkage synchronous shafts 4 through the meshing of the trigger shaft driving bevel gear 303 and the synchronous shaft driven gear 401; the linkage synchronous shaft 4 is connected to and drives the two control shafts 201 through the meshing of the synchronous shaft driving gear 402 and the control shaft driven bevel gear 203; the lower end of the rotary plug 5 is provided with a conical end, and the rotary plug... The top view of the rotating plug 5 is rectangular, and the upper surface of the rotating plug 5 matches the lower surface of the docking block 204. When the locking trigger shaft 3 rotates 90 degrees under the drive of the trigger plate 6, the synchronous shaft 4 rotates 90 degrees through the gear transmission of the trigger shaft drive bevel gear 303 and the synchronous shaft driven gear 401. At the same time, the control shaft 201 rotates 90 degrees through the gear transmission of the synchronous shaft drive gear 402 and the control shaft driven bevel gear 203, so that the rotating plug 5 rotates 90 degrees inside the container docking hole, thus controlling the docking state of the rotating plug 5 and the container docking interface.

[0041] In Example 2, based on Example 1, a rotating trigger ring 301 is tightly fitted onto the locking trigger shaft 3. A pressing push block 302 is fixedly connected to the outer surface of the rotating trigger ring 301. The two pressing push blocks 302 have an angle difference of 90 degrees. A trigger shaft drive bevel gear 303 is fixedly connected to each end of the locking trigger shaft 3 via an interference fit. As the locking trigger shaft 3 rotates, the rotating trigger ring 301 rotates, causing the two pressing push blocks 302 to exchange orientations, controlling the pressing and releasing of the two normally closed / open buttons 1001, and controlling the on / off state of the two status indicator lights 9. Two normally closed / open buttons 1001 are fixedly connected above the power supply 10, located below the two pressing push blocks 302. Both normally closed / open buttons 1001 are electrically connected to the power supply 10 and connected to the two status indicator lights 9 via electrical wires. The status indicator lights 9 use LED beads as a light source. The light panel has an "L" shaped structure. The support rods between the two sets of status indicator lights 9 are 90 degrees apart. As the orientation of the locking trigger shaft 3 changes, the two status indicator lights 9 rotate upwards to display the status. The LEDs on the two status indicator lights 9 are of two different colors. The "L" shaped status indicator lights 9 allow operators and observers to view the status from multiple directions, improving the visibility range.

[0042] The working principle of this embodiment is as follows: First, when the spreader is unloaded, the direction of the rotating plug 5 is consistent with the direction of the docking block 204. The container jack 1 is moved above the container by the lifting machinery, and the rotating plug 5 is vertically inserted into the rectangular docking interface of the container, so that the container jack 1 is in contact with the upper surface of the container. At this time, the four slings and the locking control rope 8 connected to the lifting machinery are in a slack and bent state. The adjusting bracket 7 slides down along the trigger plate 6 under its own weight, so that the adjusting pin 701 slides to one end of the bottom of the inclined slide groove 601. When lifting the cargo, the four slings and the locking control rope 8 are pulled upward synchronously by the lifting machinery. The locking control rope 8 is first straightened and then... When the adjusting bracket 7 is pulled upwards, it enters the linkage groove 602 at its lower end under the vertical upward pulling force. As the locking control rope 8 is continuously pulled up, the adjusting sliding pin 701 pulls the trigger plate 6 to rotate 90 degrees, simultaneously driving the locking trigger shaft 3 to rotate 90 degrees. Through the gear transmission between the trigger shaft's driving bevel gear 303 and the synchronous shaft's driven gear 401, the linkage synchronous shaft 4 is driven to rotate 90 degrees. Simultaneously, through the gear transmission between the synchronous shaft's driving gear 402 and the control shaft's driven bevel gear 203, the control shaft 201 is driven to rotate 90 degrees, causing the rotating plug 5 to rotate 90 degrees inside the container docking hole, changing its orientation and locking it inside the container docking hole, thus completing the assembly process. The automatic docking of the container and the lifting equipment: After the container is transferred to the designated location, the container is placed on the bottom surface by the lifting machinery, and the slings and locking control ropes 8 are lowered a certain distance to relax and bend. At this time, the adjusting bracket 7 slides to the side and downward under its own weight, causing the adjusting pin 701 to slide to the other end of the inclined groove 601. When transferring the container lifting frame 1, the lifting machinery pulls the slings and locking control ropes 8 upward, causing the adjusting bracket 7 to move upward under the pulling force, so that the adjusting pin 701 enters the linkage hook groove 602 at the lower end of the triggering plate 6 in this state. The upward pull of the adjusting bracket 7 causes the triggering plate 6 to rotate 90 degrees in the opposite direction, and the triggering shaft 3 is locked. When the linkage synchronous rotating shaft 4, the control rotating shaft 201, and a series of gear transmissions are activated, the rotating plug 5 rotates 90 degrees in the opposite direction, so that the rotating plug 5 is aligned with the container docking interface again. This causes the top corner connecting lock frame 2 to disengage from the container under vertical upward pull, thereby realizing the automatic docking and separation of the container and the spreader. At the same time, as the locking trigger rotating shaft 3 rotates, the two pressing push blocks 302 alternately press the two normally closed and normally open buttons 1001, causing the two status indicator lights 9 to alternately connect to the mobile power supply 10 and light up as they rotate and unfold. This allows the operator and observer to judge the orientation of the rotating plug 5 inside the container docking hole based on the status indicator lights 9, and to visually judge the docking status of the spreader and the container.

[0043] The following points should be noted in this article:

[0044] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in a general design.

[0045] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0046] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A spreader for port cranes, comprising: Container hanger (1), the container hanger (1) is formed by the rectangular frame body of hanger crossbeam (101), hanger vertical beam (102), crossbeam connecting frame (103) and vertical beam connecting plate (104) splicing, the front end and the rear end of crossbeam connecting frame (103) are fixedly connected with the front and rear hanger crossbeam (101) respectively, the left end and the right end of vertical beam connecting plate (104) are fixedly connected with the two sides hanger vertical beam (102) respectively, characterized in that, the upper surface of vertical beam connecting plate (104) is provided with two " U ” shaped structure's rotation shaft support (105) through bolt, the upper rotation connection of vertical beam connecting plate (104) is provided with locking trigger rotation shaft (3), locking trigger rotation shaft (3) is rotatably connected with two rotation shaft supports (105) through bearing, four top corners of container hanger (1) are fixedly connected with one top corner connection lock frame (2) respectively, the inside rotation connection of top corner connection lock frame (2) is provided with control rotary shaft (201), the lower end of control rotary shaft (201) is fixedly connected with rotary plug (5), the inside rotation connection of hanger vertical beam (102) is provided with linkage synchronous rotation shaft (4) through bearing, locking trigger rotation shaft (3) is provided with trigger hanging plate (6) through interference fit on the upper, trigger hanging plate (6) is movably connected with adjusting pull frame (7), the upper connection of adjusting pull frame (7) is provided with upper lock control pull rope (8), locking trigger rotation shaft (3) is fixedly connected with two state display lamps (9), the upper surface of vertical beam connecting plate (104) is provided with mobile power supply (10) through screw, mobile power supply (10) is located below locking trigger rotation shaft (3).

2. The port hoisting machinery special sling according to claim 1, characterized in that, the top corner connection lock frame (2) is a rectangular shell with an opening on the inside, the control rotary shaft (201) is perpendicular to the lower surface of the top corner connection lock frame (2), a rotary shaft limiting ring (202) is welded onto the control rotary shaft (201), the rotary shaft limiting ring (202) is located inside the top corner connection lock frame (2), a control shaft driven bevel gear (203) is fixedly connected to the upper end of the control rotary shaft (201) through interference fit, and a long strip-shaped butt joint plug (204) is welded to the lower surface of the top corner connection lock frame (2).

3. The port hoisting machinery special sling according to claim 1, characterized in that, the locking trigger rotation shaft (3) is tightly sleeved with a rotary trigger ring (301), the outer surface of the rotary trigger ring (301) is fixedly connected with two extrusion push blocks (302), the angles of the two extrusion push blocks (302) are different by ninety degrees, and one trigger shaft driving bevel gear (303) is fixedly connected to each end of the locking trigger rotation shaft (3).

4. The port hoisting machinery special sling according to claim 1, characterized in that, a synchronous shaft driven gear (401) is fixedly connected to the middle of the linkage synchronous rotation shaft (4) through interference fit, and one synchronous shaft driving gear (402) is fixedly connected to each end of the linkage synchronous rotation shaft (4).

5. The port hoisting machinery special sling according to claim 4, characterized in that, The locking trigger pivot shaft (3) is connected and driven by the meshing of the trigger shaft driving bevel gear (303) and the synchronous shaft driven gear (401), and the two linkage synchronous pivot shafts (4) are connected and driven by the meshing of the synchronous shaft driving gear (402) and the control shaft driven bevel gear (203).

6. The port hoisting machinery special sling according to claim 2, characterized in that, The lower end of the rotating plug (5) is provided with a tapered end, the top view structure of the rotating plug (5) is rectangular, and the upper surface of the rotating plug (5) is matched with the lower surface structure of the butt joint plug block (204).

7. The port hoisting machinery special sling according to claim 1, characterized in that, The trigger hanging plate (6) is in the shape of a right isosceles triangle plate body, and the trigger hanging plate (6) is internally provided with a diagonal sliding groove (601), the diagonal sliding groove (601) is parallel to the long side of the trigger hanging plate (6), and the two end positions of the diagonal sliding groove (601) are respectively provided with a linkage hook groove (602), and the linkage hook groove (602) is bent towards the long side direction of the trigger hanging plate (6).

8. The port hoisting machinery special sling according to claim 7, characterized in that, The adjusting pull frame (7) is a "U" shaped frame, and the adjusting pull frame (7) is internally fixedly connected with an adjusting sliding pin (701), the adjusting sliding pin (701) is slidingly connected in the diagonal sliding groove (601), the upper end of the adjusting pull frame (7) is fixedly connected with a pull spring (702), and the upper end of the pull spring (702) is fixedly connected with the lower end of the upper lock control pull rope (8).

9. The port hoisting machinery special sling according to claim 3, characterized in that, The upper end of the mobile power supply (10) is fixedly connected with two normally-off dynamic combination buttons (1001), the two normally-off dynamic combination buttons (1001) are respectively located below the two extrusion push blocks (302), the two normally-off dynamic combination buttons (1001) are electrically connected with the mobile power supply (10), and the two normally-off dynamic combination buttons (1001) are respectively connected with the two state display lamps (9) through electrical lines.

10. The port hoisting machinery special sling according to claim 1, characterized in that, The state display lamp (9) takes an LED lamp bead as a light source, the lamp panel of the state display lamp (9) is in the shape of an "L" structure, and the angles of the supporting rods between the two groups of state display lamps (9) are different by ninety degrees.

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