Suspension type sling structure for crane and use method thereof

Abstract

The present invention discloses a suspension sling structure for a crane and a use method thereof, and relates to the technical field of cranes, comprising a hanging unit, wherein the hanging unit comprises a hanging rod distributed in a ring array, a hanging seat is rotatably connected to the bottom side of the hanging rod, a hanging ring is movably provided on the hanging seat, a hanging chain is provided at the bottom of the hanging ring, a hook is provided at both ends of the hanging chain, the chain is hung on the hanging ring through the hook at one end, and one end of each hanging rod close to each other is commonly fixedly connected with a hanging plate, a hanging ring is provided at the top of the hanging plate, an adjusting unit is provided on the hanging rod, and the adjusting unit is used to adjust the horizontal position of the hanging chain, a limiting unit is provided on the hook, and a separation unit is provided at the bottom of the hanging plate. The present invention can effectively prevent collisions between lifted heavy objects, and make the overall force of the sling uniform when lifting heavy objects of different weights at the same time. In addition, timely intervention can be made to prevent the heavy objects from falling off, thereby reducing the risk of the goods falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, in particular to a suspension type sling structure for a crane and a use method thereof. Background Art

[0002] A crane is a mechanical equipment composed of an electric motor, a reducer, a brake, a wheel set and a lifting mechanism. It is widely used in construction sites, port terminals, steel and metallurgical industries, mines and quarries, clean energy equipment installation, infrastructure construction, aerospace fields, warehousing and logistics, etc. Among them, the crane's suspended sling is a key component in lifting machinery for lifting and moving objects.

[0003] A Chinese patent with application number 2021105086973 discloses a crane sling suspension device, including a supporting mechanism, on which a lifting mechanism is slidably fitted; a distance adjusting mechanism is provided on the supporting mechanism; a limiting mechanism is connected to the distance adjusting mechanism, and the distance adjusting mechanism drives the limiting mechanism; a docking mechanism is installed on the limiting mechanism, and the supporting mechanism includes a support rod, two of the support rods are cross-welded together, and reinforcing ribs are welded on the two support rods, and a first connecting rod and a second connecting rod are connected between the support rods. However, during use, the hoisted heavy objects will swing and cause the heavy objects to collide with each other, resulting in damage to the heavy objects.

[0004] Furthermore, when the weights of the objects being hoisted are inconsistent, the load on the sling will be uneven, increasing the risk of damage to the sling. In addition, when the objects being hoisted slip, it cannot be stopped in time, causing the objects to fall and be damaged. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a suspended sling structure for a crane and a method of using the same, which can effectively prevent collisions between lifted heavy objects and make the overall force of the sling uniform when lifting heavy objects of different weights at the same time. In addition, when a heavy object falls off, timely intervention can be made to prevent it from falling off, thereby reducing the risk of cargo falling off, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a suspension type sling structure for a crane, comprising a sling unit, the sling unit comprising slings distributed in a ring array, the bottom side of the sling is rotatably connected to a sling seat, the sling is movably provided with a sling ring, the bottom of the sling ring is provided with a sling chain, both ends of the sling chain are provided with sling hooks, the sling chain is hung on the sling ring through the sling hook at one end, the ends of the slings close to each other are commonly fixedly connected to a sling plate, and the top of the sling plate is provided with a sling ring;

[0007] The suspension rod is provided with an adjustment unit, and the adjustment unit is used to adjust the horizontal position of the suspension chain; the suspension hook is provided with a limit unit, and the limit unit is used to close the opening of the suspension hook; the bottom of the suspension plate is provided with a separation unit, and the separation unit is used to separate the suspension chains;

[0008] The limiting unit comprises an articulated seat and a movable seat, the middle of the articulated seat is fixed and penetrated by an articulated shaft, the movable seat is rotatably connected to the end of the articulated shaft, and a limiting plate is provided at the bottom of the movable seat;

[0009] The separation unit includes an electric push rod, a guide rod is provided at the bottom telescopic end of the electric push rod through a mounting seat, a fixed seat is provided at the bottom end of the guide rod, a telescopic rod is provided in a circular array on the side of the fixed seat, a square tube is provided at the end of the telescopic rod through a connecting seat, a movable rod is slidably fitted in the middle of the square tube, and a limit frame is provided at the end of the movable rod.

[0010] Furthermore, the adjustment unit comprises a sliding groove, an adjustment seat is slidably connected in the sliding groove, an adjustment screw is rotatably connected in the sliding groove, and the adjustment screw is threadedly connected to the adjustment seat.

[0011] Furthermore, the sliding groove is opened in the suspension rod, the top of the suspension seat is rotatably connected to the bottom of the adjustment seat, an adjustment motor is provided at the end of the suspension rod, and the output shaft of the adjustment motor is fixedly connected to the end of the adjustment screw.

[0012] Furthermore, the hinge seat is arranged at the inner top of the hook, and a torsion spring is arranged on the hinge shaft at a position between the hinge seat and the movable seat;

[0013] A limiting groove is provided at the other inner end of the hook, and the limiting groove corresponds to the limiting plate.

[0014] Furthermore, an inclined plate is provided on the top of the movable seat, and an arc block is provided on a side of the inclined plate close to the hanging chain.

[0015] Furthermore, the electric push rod is arranged at the bottom of the hanging plate;

[0016] A pressure sensor is provided between the end of the movable rod and the limit frame. The limit frame is movably sleeved on the outside of the lifting chain. A sliding wheel is rotatably connected to the middle inner side of the limit frame. The lifting chain corresponds to the side of the sliding wheel away from the fixed seat. A buffer spring is sleeved on the outside of the movable rod. The two ends of the buffer spring are respectively fixedly connected to the movable rod and the square tube.

[0017] Furthermore, a slider is slidably connected to the side of the guide rod in a circular array, a connecting rod is movably connected between the slider and the connecting seat, and an electric telescopic rod is provided in a circular array at the bottom of the mounting seat, and the bottom telescopic end of the electric telescopic rod is fixedly connected to the slider.

[0018] A method for using the above-mentioned suspension sling structure for a crane comprises the following steps:

[0019] S1. First, lower the lifting part of the crane and hang the hanging ring on the lifting part of the crane;

[0020] S2. Use the adjustment unit to drive the lifting chain to move horizontally and linearly, adjust the distance between the hooks according to the volume of the cargo to be lifted, and make the separation unit drive the limit frame to move horizontally, so that the movable rod is in a compressed state;

[0021] S3. Hang the cargo to be lifted on the hook and slowly lift it with the crane;

[0022] S4. When the cargo swings during the lifting process, the electric push rod is extended to move the limit frame downward to the bottom of the lifting chain to limit the swing range of the lifting chain;

[0023] S5. When the weight of the lifted cargo is unevenly distributed, the adjusting unit corresponding to the heavy cargo drives the lifting chain guide rod to move, and the separating unit corresponding to the heavy cargo drives one side of the limit frame guide rod to shrink synchronously.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. When the lifting chain swings, the present invention causes each adjusting motor to drive each adjusting screw to rotate respectively, and causes the electric telescopic rod to extend, so that each lifting chain moves to the side away from the guide rod, thereby increasing the distance between each lifting chain and preventing collision between heavy objects. When lifting a large-volume heavy object, after the lifting chain follows the adjusting seat to move to the farthest distance, each electric telescopic rod continues to extend downward, and the sliding wheel pushes against the lifting chain to continue to move to the side away from the guide rod, thereby further increasing the distance between the heavy objects. Then, the electric push rod is used to move the mounting seat downward, so that the limit frame slides down to the bottom of the lifting chain to limit the swing of the lifting chain.

[0026] 2. When the weight distribution on each lifting chain is uneven, the adjusting screw corresponding to the low-weight object is rotated and the electric telescopic rod is extended, and the low-weight object moves to the side away from the fixed seat, so that the low-weight object is farther than the high-weight object, so that the overall structure remains balanced.

[0027] 3. When a heavy object slips, the present invention causes the electric push rod to extend quickly, the limit frame to move downward quickly to collide with the arc block, the arc block moves to the outside of the hook, and the limit plate to move quickly to the inside of the hook. The limit plate is used to squeeze the hanging rope of the heavy object to stop the hanging rope in the slipping state, prevent it from continuing to slip, and prevent the heavy object from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of another angle of the present invention;

[0030] Figure 3 It is a schematic diagram of the shaft side structure of the present invention;

[0031] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0032] Figure 5 It is a front view structural schematic diagram of the present invention.

[0033] In the figure: 1. Suspension unit; 101. Suspension rod; 102. Suspension seat; 103. Suspension ring; 104. Suspension chain; 105. Suspension hook; 106. Suspension plate; 107. Suspension ring; 2. Adjustment unit; 201. Sliding groove; 202. Adjustment seat; 203. Adjustment screw; 204. Adjustment motor; 3. Limitation unit; 301. Articulation seat; 302. Articulation shaft; 303. Movable seat; 304. Limitation plate; 30 5. Limiting groove; 306. Inclined plate; 307. Arc block; 4. Separation unit; 401. Electric push rod; 402. Mounting seat; 403. Guide rod; 404. Fixed seat; 405. Telescopic rod; 406. Connecting seat; 407. Square tube; 408. Movable rod; 409. Limiting frame; 410. Sliding wheel; 411. Buffer spring; 412. Sliding block; 413. Connecting rod; 414. Electric telescopic rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0035] See also Figure 1-5The present invention discloses a suspended sling structure for a crane, including a sling unit 1, wherein the sling unit 1 includes sling rods 101 distributed in a ring array, the bottom side of the sling rods 101 is rotatably connected with a sling seat 102, a sling ring 103 is movably provided on the sling seat 102, a sling chain 104 is provided at the bottom of the sling ring 103, both ends of the sling chain 104 are provided with a hook 105, the sling chain 104 is hung on the sling ring 103 through the hook 105 at one end, and the ends of the sling rods 101 close to each other are commonly fixedly connected with a sling plate 106, the top of the sling plate 106 is provided with a sling ring 107, and the sling ring 107 is used to hang the sling structure as a whole on the lifting part of the crane.

[0036] An adjusting unit 2 is provided on the suspension rod 101, and the adjusting unit 2 is used to adjust the horizontal distance between the suspension chain 104 and the guide rod 403. The adjusting unit 2 includes a sliding groove 201, and an adjusting seat 202 is slidably connected in the sliding groove 201. An adjusting screw 203 is rotatably connected in the sliding groove 201, and the adjusting screw 203 is threadedly connected to the adjusting seat 202. The sliding groove 201 is opened in the suspension rod 101, and the top of the suspension seat 102 is rotatably connected to the bottom of the adjusting seat 202. An adjusting motor 204 is provided at the end of the suspension rod 101, and the output shaft of the adjusting motor 204 is fixedly connected to the end of the adjusting screw 203. The adjusting motor 204 is used to drive the adjusting screw 203 to rotate, so that the adjusting seat 202 moves linearly under the limiting action of the sliding groove 201, and the adjusting seat 202 drives the suspension seat 102 to move linearly, thereby realizing the horizontal linear movement of the hook 105 and the suspension chain 104.

[0037] The hook 105 is provided with a limiting unit 3, which is used to close the opening of the hook 105 and limit the hanging rope for lifting heavy objects. The limiting unit 3 includes an articulated seat 301 and a movable seat 303. The articulated seat 301 is arranged at the inner top of the hook 105. The middle of the articulated seat 301 is fixed and penetrated by an articulated shaft 302. The movable seat 303 is rotatably connected to the end of the articulated shaft 302. A torsion spring is provided at a position between the articulated seat 301 and the movable seat 303 on the articulated shaft 302. A limiting plate 301 is provided at the bottom of the movable seat 303. 04. A limiting groove 305 is provided at the other inner end of the hook 105. In the initial state, the limiting groove 305 corresponds to the limiting plate 304. When a heavy object is hung on the bottom hook 105 or the top hook 105 is hung on the ring 103, the limiting plate 304 is pressed toward the inner side of the hook 105, and the movable seat 303 rotates around the hinge shaft 302. The torsion spring is elastically twisted. After the heavy object hanging rope completely enters the hook 105, the torsion spring elastically resets and drives the limiting plate 304 to elastically reset to achieve the limitation of the heavy object hanging rope.

[0038] A separation unit 4 is provided at the bottom of the hanging plate 106, and the separation unit 4 is used to separate each hanging chain 104. The separation unit 4 includes an electric push rod 401, which is provided at the bottom of the hanging plate 106. The electric push rod 401 is used to drive the components on the fixed seat 404 to move up and down to adjust the height of the limit frame 409 in the vertical direction. The bottom telescopic end of the electric push rod 401 is provided with a guide rod 403 through the mounting seat 402, and the bottom end of the guide rod 403 is provided with a fixed seat 404. The side of the fixed seat 404 is provided with a circular array of telescopic rods 405, and the end of the telescopic rod 405 is provided with a square tube 407 through the connecting seat 406. The middle part of the square tube 407 is slidably matched with a movable rod 408, and the end of the movable rod 408 is provided with a limit frame 409. A pressure sensor is provided between the end of the movable rod 408 and the limit frame 409. The pressure sensor is used In order to detect the pressure of the limit frame 409 on the movable rod 408, the limit frame 409 is movably sleeved on the outside of the suspension chain 104, and the middle part of the inner side of the limit frame 409 is rotatably connected to the sliding wheel 410, and the suspension chain 104 and the sliding wheel 410 correspond to each other on the side away from the fixed seat 404, so that the relative movement between the limit frame 409 and the suspension chain 104 is smooth. In the initial state, the limit frame 409 is sleeved on the middle part of the suspension chain 104 in the vertical direction, and the sliding wheel 410 has an initial supporting force on the suspension chain 104. The limit frame 409 and the sliding wheel 410 limit the suspension chain 104 to prevent interference between the suspension chains 104. The outer side of the movable rod 408 is sleeved with a buffer spring 411, and the two ends of the buffer spring 411 are respectively fixedly connected to the movable rod 408 and the square tube 407, so as to realize buffering and elastic support of the suspension chain 104.

[0039] The side of the guide rod 403 is slidably connected with a slider 412 in a circular array, and a connecting rod 413 is movably connected between the slider 412 and the connecting seat 406. The bottom of the mounting seat 402 is provided with an electric telescopic rod 414 in a circular array. The bottom telescopic end of the electric telescopic rod 414 is fixedly connected to the slider 412. The extension and retraction of the electric telescopic rod 414 drives the slider 412 to slide vertically along the guide rod 403, so that the inclination angle of the connecting rod 413 changes. At the same time, the connecting rod 413 drives the connecting seat 406 and the square tube 407 to move horizontally.

[0040] When in use, the hanging ring 107 is hung on the lifting part of the crane, and each electrical component is electrically connected to the external power supply. Then, the adjusting motor 204 is used to drive the rotation of the adjusting screw 203, so that the adjusting seat 202 drives the hanging chain 104 to move horizontally, and the distance between each hook 105 is adjusted according to the size of the heavy object. The electric telescopic rod 414 is started synchronously, and the connecting seat 406 and the square tube 407 are driven to move horizontally through the slider 412 and the connecting rod 413. The telescopic rod 405 performs a telescopic movement, so that the initial supporting force of the sliding wheel 410 on the hanging chain 104 remains unchanged, and the object to be lifted is The hanging ropes of the heavy objects are respectively hung on each hook 105, and the limit plate 304 limits the hanging ropes of the heavy objects to be lifted. After preparation, lifting is carried out. During the lifting process, the lifting chain 104 is gradually in a taut state, and the pressure of the lifting chain 104 on the sliding wheel 410 gradually increases, that is, the pressure of the limit frame 409 on the pressure sensor gradually increases, and the movable rod 408 slides toward the inside of the square tube 407, and the buffer spring 411 is compressed. When the heavy object is completely lifted, the pressure of the lifting chain 104 on the sliding wheel 410 tends to be stable, and the pressure value of the pressure sensor is stable within the normal first pressure threshold range.

[0041] However, during the lifting process of the heavy object, the structure of the lifting chain 104, the deviation between the heavy object and the lifting chain 104, and other external factors may cause the heavy object to swing, increase the wear of the parts, and cause collisions between the heavy objects. In order to solve the above problems:

[0042] When the heavy object swings, the squeezing pressure of the lifting chain 104 on the sliding wheel 410 will be unstable, which will cause the pressure sensor to always be in a state of large fluctuations. The pressure sensor is used to detect the maximum and minimum values ​​of the pressure value on the pressure sensor when the lifting chain 104 swings to judge the swing amplitude of the lifting chain 104. When the swing amplitude of the lifting chain 104 exceeds the limit value, it is actively judged that the lifting chain 104 is in a swinging state. At this time, each adjustment motor 204 is started first, and the linear motion of the adjustment seat 202 is driven by each adjustment screw 203 to make each lifting chain 104 move to the side away from the guide rod 403, thereby increasing the distance between each lifting chain 104 and preventing collisions between heavy objects. The electric telescopic rod 414 is also started to extend synchronously, so that the limit frame 409 moves synchronously to the side away from the guide rod 403 to maintain the initial supporting force of the sliding wheel 410 on the lifting chain 104.

[0043] However, when the heavy objects are large in size, when the lifting chain 104 follows the adjusting seat 202 to move to the farthest distance, the heavy objects will still collide with each other. Therefore, when lifting a large heavy object, the lifting chain 104 follows the adjusting seat 202 to move to the farthest distance, and then each electric telescopic rod 414 continues to extend downward, and the sliding wheel 410 is used to push the lifting chain 104 to continue to move to the side away from the guide rod 403, so that the distance between the large heavy objects is further increased, and then the electric push rod 401 is started to extend, so that the components on the mounting seat 402 move downward, that is, the limit frame 40 9 moves downward, so that the limit frame 409 moves to the bottom of the lifting chain 104, and the sliding wheel 410 and the limit frame 409 can be used to limit the bottom of the lifting chain 104, thereby reducing the swingable length of the lifting chain 104 and effectively limiting the swing of the lifting chain 104. When the pressure sensor detects that the pressure value it is subjected to reaches the normal first pressure threshold range, it means that the weight is in a stable state, thereby effectively preventing the weight from swinging. Therefore, the present invention effectively prevents the weight from swinging significantly during the lifting process through the linkage cooperation of the adjustment unit 2 and the separation unit 4.

[0044] In addition, when lifting heavy objects, if the weight difference between the heavy objects on each lifting chain 104 is large, it will cause uneven force on the overall structure of the sling, which will cause the overall structure to tilt, easily causing the heavy objects to fall off, and will accelerate wear. In order to solve the above problems:

[0045] When the weight of the objects on the chains 104 is unevenly distributed, the chains 104 corresponding to the lighter objects exert less pressure on the sliding wheel 410, while the chains 104 corresponding to the heavier objects exert more pressure on the sliding wheel 410. Therefore, when the absolute value of the difference between the pressure value detected by one of the pressure sensors and the pressure value detected by any other pressure sensor is greater than the set second pressure threshold, it is actively determined that the weight of the chains 104 is unevenly distributed, and the adjustment motor 204 corresponding to the lighter objects is started to drive the adjustment screw 203 to rotate. The movement causes the adjustment seat 202 corresponding to the low-weight weight to move toward the side away from the fixed seat 404, so that the distance between the low-weight weight and the fixed seat 404 is greater than the distance between the high-weight weight and the fixed seat 404, and in this process, the electric telescopic rod 414 corresponding to the low-weight weight is extended synchronously, and the limit frame 409 is moved synchronously toward the side away from the fixed seat 404 through the slider 412 and the connecting rod 413 to maintain the supporting force of the sliding wheel 410 on the lifting chain 104, so that the lever principle can be used to keep the overall structure of the lifting device balanced to avoid the situation where the overall force is uneven and tilted.

[0046] In addition, when the heavy object hanging rope slips in the hook 105, it will fall and be damaged, and seriously threaten the personal safety of the ground staff. In order to solve the above problem:

[0047] An inclined plate 306 is provided on the top of the movable seat 303, and an arc block 307 is provided on the side of the inclined plate 306 close to the lifting chain 104. When the limiting frame 409 moves downward until it contacts the arc block 307, the arc block 307 is squeezed to the side away from the lifting chain 104, so that the limiting plate 304 moves toward the inside of the hook 105.

[0048] When the weight in the hook 105 slips, the weight continues to move downward, and the downward pulling force exerted by the weight on the hanging chain 104 will slowly decrease, and the extrusion force of the hanging chain 104 on the sliding wheel 410 will slowly decrease, and the force on the pressure sensor will gradually decrease. Therefore, when the pressure value detected by the pressure sensor continues to slowly decrease, it is actively judged that the weight has slipped. At this time, the electric push rod 401 extends rapidly, so that the mounting seat 402 drives the guide rod 403 and the fixing seat 404 to move downward rapidly, so that the limit frame 409 moves downward rapidly, so that The side of the limit frame 409 quickly collides with the arc block 307, and the arc block 307 moves to the side away from the lifting chain 104, so that the bottom limit plate 304 quickly moves toward the inside of the hook 105, thereby quickly squeezing the hanging rope of the heavy object. By providing a sharp protrusion on the inner side of the limit plate 304, timely intervention and prevention of the hanging rope in a slipping state can be achieved, thereby preventing the hanging rope of the heavy object from further slipping, thereby effectively preventing the weight from falling. Therefore, the present invention effectively prevents the lifting of the heavy object from slipping by utilizing the linkage cooperation of the separation unit 4 and the limit unit 3.

[0049] It should be noted that during the slippage of the weight rope, due to factors such as friction and elastic deformation between the weight rope and the hook 105 and at the connection between the weight rope and the weight, the slippage of the weight rope is a relatively slow process at the beginning, and the weight is also in a slow falling process. During this process, the downward pulling force of the weight on the chain 104 will gradually decrease to zero, instead of disappearing instantly. Therefore, in the initial stage of the slippage of the weight rope, the squeezing friction of the weight rope by the limit plate 304 and the sharp protrusion is sufficient to prevent the slippage of the weight rope. Example 2

[0050] The present invention also provides a method for using the suspension sling structure for a crane as described in Example 1, comprising the following steps:

[0051] S1. First, lower the lifting part of the crane and hang the hanging ring on the lifting part of the crane;

[0052] S2. Use the adjustment unit to drive the lifting chain to move horizontally and linearly, adjust the distance between the hooks according to the volume of the cargo to be lifted, and make the separation unit drive the limit frame to move horizontally, so that the movable rod is in a compressed state;

[0053] S3. Hang the cargo to be lifted on the hook and slowly lift it with the crane;

[0054] S4. When the cargo swings during the lifting process, the electric push rod is extended to move the limit frame downward to the bottom of the lifting chain to limit the swing range of the lifting chain;

[0055] S5. When the weight of the lifted cargo is unevenly distributed, the adjusting unit corresponding to the heavy cargo drives the lifting chain guide rod to move, and the separating unit corresponding to the heavy cargo drives one side of the limit frame guide rod to shrink synchronously.

[0056] It should be noted that the specific operation process shall be subject to that in Example 1.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A suspension sling structure for a crane, comprising a sling unit (1), characterized in that: The hanging unit (1) comprises hanging rods (101) distributed in a circular array, the bottom side of the hanging rods (101) is rotatably connected to a hanging seat (102), a hanging ring (103) is movably provided on the hanging seat (102), a hanging chain (104) is provided at the bottom of the hanging ring (103), both ends of the hanging chain (104) are provided with hooks (105), the hanging chain (104) is hung on the hanging ring (103) through the hook (105) at one end, and the ends of the hanging rods (101) close to each other are commonly fixedly connected to a hanging plate (106), and the top of the hanging plate (106) is provided with a hanging ring (107); The suspension rod (101) is provided with an adjustment unit (2), the adjustment unit (2) is used to adjust the horizontal position of the suspension chain (104); the suspension hook (105) is provided with a limit unit (3), the limit unit (3) is used to close the opening of the suspension hook (105); the bottom of the suspension plate (106) is provided with a separation unit (4), the separation unit (4) is used to separate the suspension chains (104); The limiting unit (3) comprises an articulated seat (301) and a movable seat (303); the middle of the articulated seat (301) is fixed and penetrated by an articulated shaft (302); the movable seat (303) is rotatably connected to the end of the articulated shaft (302); and a limiting plate (304) is provided at the bottom of the movable seat (303); The separation unit (4) comprises an electric push rod (401), the bottom telescopic end of the electric push rod (401) is provided with a guide rod (403) through a mounting seat (402), the bottom end of the guide rod (403) is provided with a fixing seat (404), the side of the fixing seat (404) is provided with telescopic rods (405) in a circular array, the end of the telescopic rod (405) is provided with a square tube (407) through a connecting seat (406), the middle part of the square tube (407) is slidably matched with a movable rod (408), the end of the movable rod (408) is provided with a limit frame (409), and the limit frame (409) is movably sleeved on the outside of the suspension chain (104).

2. The suspension sling structure for a crane according to claim 1, characterized in that: The adjustment unit (2) comprises a sliding groove (201), an adjustment seat (202) is slidably connected in the sliding groove (201), an adjustment screw (203) is rotatably connected in the sliding groove (201), and the adjustment screw (203) is threadedly connected to the adjustment seat (202).

3. The suspension sling structure for a crane according to claim 2, characterized in that: The sliding groove (201) is opened in the suspension rod (101), the top of the suspension seat (102) is rotatably connected to the bottom of the adjustment seat (202), an adjustment motor (204) is provided at the end of the suspension rod (101), and the output shaft of the adjustment motor (204) is fixedly connected to the end of the adjustment screw rod (203).

4. The suspension sling structure for a crane according to claim 1, characterized in that: The hinge seat (301) is arranged at the inner top of the hook (105), and a torsion spring is arranged on the hinge shaft (302) at a position between the hinge seat (301) and the movable seat (303); A limiting groove (305) is provided at the other inner end of the hook (105), and the limiting groove (305) corresponds to and cooperates with the limiting plate (304).

5. The suspension sling structure for a crane according to claim 1, characterized in that: An inclined plate (306) is provided on the top of the movable seat (303), and an arc-shaped block (307) is provided on a side of the inclined plate (306) close to the suspension chain (104).

6. The suspension sling structure for a crane according to claim 1, characterized in that: The electric push rod (401) is arranged at the bottom of the hanging plate (106); A pressure sensor is provided between the end of the movable rod (408) and the limit frame (409); a sliding wheel (410) is rotatably connected to the middle of the inner side of the limit frame (409); the hanging chain (104) corresponds to a side of the sliding wheel (410) away from the fixed seat (404); a buffer spring (411) is sleeved on the outside of the movable rod (408); and two ends of the buffer spring (411) are fixedly connected to the movable rod (408) and the square tube (407), respectively.

7. The suspension sling structure for a crane according to claim 6, characterized in that: The side surfaces of the guide rods (403) are slidably connected to sliders (412) in an annular array, and connecting rods (413) are movably connected between the sliders (412) and the connecting seat (406). The bottom of the mounting seat (402) is provided with electric telescopic rods (414) in an annular array, and the bottom telescopic ends of the electric telescopic rods (414) are fixedly connected to the sliders (412).

8. A method for using the suspension sling structure for a crane according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. First, lower the lifting part of the crane and hang the hanging ring (107) on the lifting part of the crane; S2, using the adjustment unit (2) to drive the lifting chain (104) to move horizontally and linearly, adjusting the spacing between the hooks (105) according to the volume of the cargo to be lifted, and causing the separation unit (4) to drive the limit frame (409) to move horizontally, so that the movable rod (408) is in a compressed state; S3, hang the cargo to be lifted on the hook (105), and slowly lift the cargo using a crane; S4, when the cargo swings during the lifting process, the electric push rod (401) is extended to move the limit frame (409) downward to the bottom of the lifting chain (104), thereby limiting the swing amplitude of the lifting chain (104); S5. When the weight of the lifted cargo is unevenly distributed, the adjusting unit (2) corresponding to the heavier cargo drives the lifting chain (104) to move the guide rod (403), and the separating unit (4) corresponding to the heavier cargo drives the limiting frame (409) to synchronously retract one side of the guide rod (403).

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