Irregular eccentric object self-adaptive hoisting mechanism and use method thereof

Abstract

The invention discloses a self-adaptive lifting mechanism for an irregular eccentric object and a using method of the self-adaptive lifting mechanism. The self-adaptive lifting mechanism comprises a lifting plate group, the first adjusting component is provided with a first piston rod, a supporting sliding block connected to the end of the first piston rod, a second barrel rotationally installed on the supporting sliding block and a second piston rod. Under the action of the first piston rod, the supporting sliding block moves in the radial direction along the center line of the hoisting plate set and approaches the center line of the hoisting plate set due to elastic force initially. The second piston rod coaxially slides on the second cylinder body, and is close to the supporting slide block under the action of elastic force at the beginning; the second piston rod and the first piston rod stretch out and draw back simultaneously, and the lower end of the second piston rod is connected to a hoisted object through a hoisting rope. According to the invention, the connection points and the lengths of the hoisting ropes are changed, so that the hoisting angles are changed, and the positions of the hoisting points are moved and changed, so that the self-adaptive adjustment of irregular eccentric objects is realized, the stress of each hoisting rope is redistributed, and the situation that the hoisting ropes are broken due to overlarge stress is avoided.

Description

Technical Field

[0001] This invention relates to hoisting, belonging to the field of lifting technology, and specifically to an adaptive hoisting mechanism for irregular eccentric objects and its usage method. Background Technology

[0002] Lifting devices can lift objects of different weights and transport them to other locations by rotation or translation, and are widely used in industry, construction, transportation and other fields.

[0003] For objects with uniform structure, shape, and material, lifting personnel can easily find the lifting points by visual inspection or experience, that is, fix multiple lifting ropes symmetrically at the edge of the object; for eccentric objects with uneven structure, shape, and material, lifting personnel need to continuously adjust the position according to the initial lifting situation.

[0004] For example, when lifting a container, its center of gravity shifts laterally. When lifting irregularly shaped parts, its center of gravity shifts both laterally and longitudinally. When lifting large boxes, motors, gears, and other sets of equipment, their centers of gravity are all different. During the lifting of irregularly shaped and eccentric objects, the stress on the lifting rope is related to the lifting point and the lifting angle. For example, the lifting rope closer to the center of gravity experiences relatively greater stress, while the lifting rope farther from the center of gravity experiences relatively less stress. The larger the angle between two lifting ropes, the greater the stress on the lifting rope, and the smaller the angle, the smaller the stress on the lifting rope. To ensure that the angle between two lifting ropes is as small as possible, a longer lifting rope can be used, but its stability is poorer, and the requirements for the lifting situation are higher.

[0005] When manually adjusting the lifting ropes, it is impossible to directly determine the center of gravity of an irregular object. It is necessary to continuously lift the irregular and eccentric object and adjust the lifting point or lifting angle of the lifting rope to a suitable position to match the center of gravity of the irregular object. This method is inefficient and cannot achieve rapid lifting. When multiple lifting ropes are still symmetrically fixed at the edge of the object as lifting points, the existing lifting mechanism is relatively fixed and cannot automatically adapt to the actual center of gravity, resulting in uneven stress on the multiple lifting ropes, making the overall lifting unstable, and even causing overturning or rope breakage. Summary of the Invention

[0006] The purpose of this invention is to provide an adaptive lifting mechanism for irregularly eccentric objects. The mechanism has a simple and compact structure, enabling adaptive lifting of irregularly eccentric objects, resulting in more uniform force distribution on the lifting ropes and preventing some lifting ropes from breaking due to excessive force.

[0007] To achieve the above objectives, an adaptive lifting mechanism for irregularly eccentric objects is provided, comprising:

[0008] hoisting of the slab assembly;

[0009] The first adjustment component consists of at least two sets, which are evenly arranged circumferentially below the hoisting plate assembly;

[0010] Each first adjusting component has a first piston rod, a support slider connected to the end of the first piston rod, a second cylinder rotatably mounted on the support slider, and a second piston rod;

[0011] Under the action of the first piston rod, the support slider moves radially along the center line of the hoisting plate group and is initially close to the center line of the hoisting plate group due to elastic force; the second piston rod slides coaxially on the second cylinder and is initially close to the support slider due to elastic force.

[0012] The second piston rod extends and retracts simultaneously with the first piston rod, and the lower end of the second piston rod is connected to the object being lifted via a lifting rope.

[0013] Furthermore, the first adjusting component also has a first cylinder containing hydraulic oil;

[0014] The end of the first piston rod slides and seals the first cylinder into two cavities, and a first spring is provided in the cavity away from the center line of the hoisting plate assembly;

[0015] The end of the second piston rod slides and seals the second cylinder into two cavities, and a second spring is provided in the cavity away from the supporting slider;

[0016] The cavity in the second cylinder containing hydraulic oil and located away from the support slider is connected to the cavity in the second cylinder near the center line of the lifting plate assembly via a first pipeline. The cavity near the support slider is connected to the cavity in the second cylinder away from the center line of the lifting plate assembly via a second pipeline.

[0017] Furthermore, the inner diameter of the second cylinder is larger than that of the first cylinder;

[0018] The elastic coefficient of the second spring is greater than that of the first spring.

[0019] Furthermore, the first cylinder is provided with a first fixing ring that limits the extension of the first piston rod;

[0020] The second cylinder is provided with a second fixing ring that limits the extension of the second piston rod.

[0021] Furthermore, a second adjusting component is provided between the lifting rope and the object being lifted;

[0022] The second adjustment component has an adjustment block connected to the drive component and a lifting block fixed to the object being lifted.

[0023] The hoisting rope is connected to the adjusting block;

[0024] Under the action of the driving component, the adjusting block moves closer to or further away from the center line of the lifting plate assembly on the lifting block.

[0025] Furthermore, the driving component includes a screw rod and a drive motor;

[0026] The drive motor is fixed on the lifting block, with its output end arranged in a rotating manner and threadedly connected to the adjusting block.

[0027] Furthermore, the first adjusting component also has a pressure sensor for detecting the lifting rope;

[0028] The controller receives detection signals from multiple pressure sensors and controls the movement of the adjusting block corresponding to the hoisting rope with the maximum force or the hoisting rope with the minimum force.

[0029] In a preferred embodiment, the hoisting plate assembly includes a support plate and a hoisting plate;

[0030] The lifting plate has a worm gear structure and is equipped with a radially movable lifting point. The lower end rotates on the support plate through a slewing bearing.

[0031] The driven worm gear on the support plate meshes with the worm wheel.

[0032] The present invention also aims to provide a method for using an adaptive lifting mechanism for irregular eccentric objects. By changing the connection point and length of the lifting ropes, the lifting angle and the position of the lifting point are changed, thereby achieving adaptive adjustment of the irregular eccentric object and redistributing the force on each lifting rope, thus avoiding the situation where the lifting ropes break due to excessive force.

[0033] A method for using an adaptive lifting mechanism for irregularly eccentric objects includes the following steps:

[0034] S1, initially, under the action of the first spring and the second spring, multiple first piston rods are close to the center line of the lifting plate assembly, and the second piston rods are close to the support slider; multiple adjusting blocks are located in the middle of the lifting block;

[0035] One end of the lifting rope is connected to the object being lifted via a second adjusting component;

[0036] S2, When hoisting an irregularly eccentric object, the second cylinder rotates to match the force on the hoisting ropes and keep them taut. Each hoisting rope drives the second piston rod to extend and compress the second spring. At this time, hydraulic oil enters the first cylinder from the second cylinder and causes the first piston rod to extend. The first piston rod drives the support slider and the second cylinder to move away from the center line of the hoisting plate group, so that each hoisting rope can lift and bear the load on the object.

[0037] S3, the pressure sensor detects the stress on each lifting rope to determine the lifting rope with the maximum stress and the lifting rope with the minimum stress;

[0038] When the lifting rope under the greatest force is in conjunction with the first and second piston rods, the corresponding support slider moves radially further away from the center line of the lifting plate assembly. At this time, the connection point and length of the lifting rope change, which causes the lifting angle to change and the force on the lifting rope to decrease, so that irregular eccentric objects can be self-adaptively adjusted during lifting.

[0039] S4, when the pressure sensor detects that the tension of a single lifting rope is large, or the difference between the maximum and minimum tension of the lifting rope is greater than a certain range, the controller controls the adjusting block connected to the lifting rope with the maximum tension to move away from the center line of the lifting plate group, or controls the adjusting block connected to the lifting rope with the minimum tension to move closer to the center line of the lifting plate group, thereby changing the lifting point of the maximum or minimum tension lifting rope and redistributing the force of each lifting rope.

[0040] When the pressure sensor detects that the tension of a single hoisting rope meets the requirements, or when the difference between the maximum and minimum tension of the hoisting rope is less than a certain range, the controller controls the corresponding adjusting block to stop moving.

[0041] When the adjusting block moves, if the pressure sensor detects that the tension of a single hoisting rope is still too high, or if the difference between the maximum and minimum tension of the hoisting rope is still greater than a certain range, the controller will issue an alarm signal.

[0042] S5, after the irregular eccentric object is lifted, the lifting rope is detached from the object, the second adjusting component returns to its initial position, and under the action of the first spring and the second spring, the first adjusting component returns to its initial position.

[0043] Compared with the prior art, this adaptive lifting mechanism for irregular eccentric objects works by linking the synchronous extension and retraction of the first and second piston rods. When the object being lifted is an irregular eccentric object, the lifting rope near the center of gravity of the object experiences relatively greater force. Consequently, the corresponding support slider moves radially outward, changing the connection point and length of the lifting rope. This alters the lifting angle and reduces the force on the lifting rope, achieving adaptive adjustment for irregular eccentric objects and preventing the lifting rope near the center of gravity from breaking due to excessive force.

[0044] The cavities of the first and second cylinders are interconnected to form a closed loop, resulting in a simple and compact structure that avoids the complexity of control caused by the controller controlling the first and second piston rods. In addition, the second spring has a large elastic coefficient and a large inner diameter, which not only allows the first piston rod to withstand a large lifting force, but also appropriately reduces the movement of the second piston rod while increasing the movement displacement of the first piston rod, making the lifting angle of the lifting rope more suitable for irregular eccentric objects.

[0045] A second adjustment component is installed between the lifting rope and the object being lifted. The controller receives detection signals from multiple pressure sensors and controls the movement of the adjustment block corresponding to the lifting rope with the maximum or minimum force. Therefore, not only does the lifting angle change by changing the connection point and length of the lifting rope, but also the position of the lifting point is controlled to achieve adaptive adjustment of irregularly eccentric objects. This redistributes the force on each lifting rope, making the lifting rope more uniform and preventing the lifting rope from breaking due to excessive force. Attached Figure Description

[0046] Figure 1 This is the overall front view of the present invention;

[0047] Figure 2 This is a front view of the first adjusting component in this invention;

[0048] Figure 3 This is a schematic diagram of the first piston rod and the second piston rod in the linked state in this invention;

[0049] Figure 4 This is a front view of the second adjustment component in this invention;

[0050] Figure 5 This is a schematic diagram of the supporting slider in this invention;

[0051] Figure 6 This is a simplified diagram of the forces acting on the object under lifting conditions.

[0052] In the diagram: 11. Support plate, 12. Lifting plate, 13. Slewing bearing, 14. Worm gear;

[0053] 20. First adjusting component; 21. Support slider; 211. Support roller; 22. First cylinder; 221. First piston rod; 222. First spring; 23. Second cylinder; 231. Second piston rod; 232. Second spring;

[0054] 30. Lifting ropes;

[0055] 40. Second adjusting component; 41. Lifting block; 42. Fixing block; 43. Adjusting block; 44. Drive motor; 45. Screw rod;

[0056] 50. Hoisting objects. Detailed Implementation

[0057] 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 embodiments of the present invention, and not all embodiments. Based on the 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.

[0058] like Figure 1 , Figure 2 As shown, this adaptive lifting mechanism for irregularly eccentric objects includes:

[0059] hoisting of the slab assembly;

[0060] The first adjusting component 20 consists of at least two sets, which are evenly arranged circumferentially below the lifting plate assembly;

[0061] Each first adjusting component 20 has a first piston rod 221, a support slider 21 connected to the end of the first piston rod 221, a second cylinder 23 rotatably mounted on the support slider 21, and a second piston rod 231.

[0062] Under the action of the first piston rod 221, the support slider 21 moves radially along the center line of the hoisting plate group and is initially close to the center line of the hoisting plate group due to elastic force; the second piston rod 231 slides coaxially on the second cylinder 23 and is initially close to the support slider 21 due to elastic force.

[0063] The second piston rod 231 extends and retracts simultaneously with the first piston rod 221, and its lower end is connected to the object being lifted 50 via a lifting rope 30.

[0064] Specifically, the hoisting plate assembly is the main supporting structure;

[0065] For ease of description, the area closer to the center line of the hoisting plate group is defined as inside, and the area farther from the center line of the hoisting plate group is defined as outside. The connection point between the hoisting rope 30 and the hoisting plate group is the connection point, and the connection point between the hoisting rope 30 and the hoisting object 50 is the hoisting point.

[0066] The first piston rod 221 is used to drive the support slider 21 to move radially, the second piston rod 231 is used to adjust the length of the hoisting rope 30, and the second cylinder 23 rotates on the support slider 21 to match the force angle of the hoisting rope 30; Figure 2 , Figure 5 As shown, the support slider 21 is on the hoisting plate assembly, and it can be cooperated with the linear slide rail or the T-slot structure. When it is a T-slot structure, the support slider 21 is provided with a support roller 211 that contacts the bottom wall of the T-slot.

[0067] The first piston rod 221 and the second piston rod 231 extend and retract simultaneously to link the support slider 21 with the hoisting rope 30, enabling it to adaptively adjust the connection point and hoisting angle of the hoisting rope 30. As an embodiment of the simultaneous extension and retraction of the first piston rod 221 and the second piston rod 231, the hydraulic cylinders containing the first piston rod 221 and the second piston rod 231 are independently controlled by the controller. That is, after the second piston rod 231 extends and retracts, the controller receives the corresponding signal and then controls the extension and retraction of the first piston rod 221.

[0068] In the initial state of this adaptive lifting mechanism for irregular eccentric objects, multiple support sliders 21 are located inside the lifting plate assembly, and one end of the lifting rope 30 is connected to the object being lifted 50.

[0069] When lifting, due to the weight of the object being lifted 50, the second cylinder 23 rotates to match the force on the lifting rope 30 and keep it taut. The lifting rope 30 can drive the second piston rod 231 to extend and move, while the first piston rod 221 drives the support slider 21 to move outward until all the lifting ropes 30 are in a stable lifting state.

[0070] When the object 50 is a uniform object in terms of structure, shape, and material, and the lifting point is at the same distance from the center of gravity of the object 50, the multiple lifting ropes 30 experience approximately the same force. Therefore, the radial movement position of the support slider 21 corresponding to that lifting rope 30 is approximately the same, and the lifting mechanism performs normal lifting. When the object 50 is an irregularly eccentric object, the lifting rope 30 closer to the center of gravity experiences relatively greater force. Consequently, the radial movement position of the support slider 21 corresponding to that lifting rope 30 is further outward. At this point, the connection point and length of the lifting rope 30 change, causing a change in the lifting angle. The force on the lifting rope 30 will decrease, or it can be redistributed to other lifting ropes 30, achieving adaptive adjustment for irregularly eccentric objects and preventing the lifting rope 30 closer to the center of gravity from experiencing excessive force and breaking.

[0071] like Figure 2 , Figure 3 As shown, in the preferred embodiment, the first adjusting component 20 further includes a first cylinder 22 containing hydraulic oil;

[0072] The end of the first piston rod 221 slides and seals the first cylinder 22 into two cavities, and a first spring 222 is provided in the cavity away from the center line of the hoisting plate group;

[0073] The end of the second piston rod 231 slides and seals the second cylinder 23 into two cavities, and a second spring 232 is provided in the cavity away from the supporting slider 21.

[0074] The cavity containing hydraulic oil in the second cylinder 23 and located away from the support slider 21 is connected to the cavity of the second cylinder 23 near the center line of the lifting plate assembly via a first pipeline. The cavity near the support slider 21 is connected to the cavity of the second cylinder 23 away from the center line of the lifting plate assembly via a second pipeline.

[0075] Specifically, both the first cylinder 22 and the second cylinder 23 are filled with hydraulic oil, which is used to enable the hydraulic oil to form a closed loop.

[0076] The first piston rod 221 divides the first cylinder 22 into two cavities: the inner one is cavity a, and the outer one is cavity b. The second piston rod 231 divides the second cylinder 23 into two cavities: the cavity closer to the support slider 21 is cavity B, and the cavity farther from the support slider 21 is cavity A. The first spring 222 is located in cavity b, and the second spring 232 is located in cavity A. Cavities a and A are connected by a first pipeline, and cavities b and B are connected by a second pipeline.

[0077] When the hoisting rope 30 applies force to the hoisting object 50, the second piston rod 231 moves to compress cavity A, and the second spring 232 is under pressure. Hydraulic oil enters cavity a from cavity A and pushes the first piston rod 221 to move outward, compressing cavity b, and the first spring 222 is under pressure. The hydraulic oil then flows back to cavity B.

[0078] When the hoisting rope 30 is not under hoisting force, under the action of the elastic force of the first spring 222 and the second spring 232, the first piston rod 221 moves inward and the second piston rod 231 moves upward, and the corresponding hydraulic oil flows in the opposite direction.

[0079] This method has a simple and compact structure, which allows the hydraulic oil to be in a closed-loop state, realizing the adaptive linkage of simultaneous extension and retraction of the first piston rod 221 and the second piston rod 231, avoiding the complexity of control caused by the controller controlling the action of the first piston rod 221 and the second piston rod 231.

[0080] Furthermore, the inner diameter of the second cylindrical body 23 is larger than that of the first cylindrical body 22;

[0081] The elastic coefficient of the second spring 232 is greater than that of the first spring 222;

[0082] Specifically, the second spring 232 has a larger elastic coefficient and a larger inner diameter. Its purpose is not only to enable the first piston rod 221 to withstand a larger lifting force, but also to appropriately reduce the movement of the second piston rod 231 and increase the movement displacement of the first piston rod 221, so that the lifting angle of the lifting rope 30 is more suitable for irregular eccentric objects.

[0083] That is, after the second piston rod 231 moves a small displacement, the amount of hydraulic oil entering the cavity a from the cavity A can ensure that the first piston rod 221 moves a large displacement. In addition, the second spring 232 has a large elastic coefficient and can better adapt to the larger lifting force, avoiding excessive elongation of the second piston rod 231, which would cause poor stability of the lifted object 50.

[0084] Furthermore, the first cylinder 22 is provided with a first fixing ring that limits the extension of the first piston rod 221;

[0085] The second cylinder 23 is provided with a second fixing ring that limits the extension of the second piston rod 231;

[0086] Specifically, the first fixing ring and the second fixing ring respectively limit the first piston rod 221 and the second piston rod 231 to prevent the first piston rod 221 and the second piston rod 231 from elongating too much.

[0087] like Figure 4 As shown, in the preferred embodiment, a second adjusting component 40 is provided between the lifting rope 30 and the object being lifted 50;

[0088] The second adjustment component 40 has an adjustment block 43 connected to the drive component and a lifting block 41 fixed to the lifting object 50;

[0089] The hoisting rope 30 is connected to the adjusting block 43;

[0090] Under the action of the driving component, the adjusting block 43 moves closer to or further away from the center line of the lifting plate assembly on the lifting block 41;

[0091] Furthermore, the driving component includes a screw rod 45 and a drive motor 44;

[0092] The drive motor 44 is fixed on the lifting block 41, with its output end rotatably arranged and threadedly connected to the adjusting block 43;

[0093] Specifically, the second adjusting component 40 is used to adjust the position of the lifting point between the lifting rope 30 and the object being lifted 50;

[0094] The adjusting block 43 can be connected to the hoisting object 50, and its load-bearing capacity is much greater than that of the hoisting rope 30. The adjusting block 43 can move inward and outward to ensure the position of the hoisting point changes. For example, when the drive motor 44 starts, the screw rod 45 rotates, causing the threaded adjusting block 43 to move inward and outward. It can be seen that the adjusting block 43 can be assembled with the hoisting block 41 through a linear slide rail or T-slot structure, and the two ends of the screw rod 45 are rotatably mounted on the fixed block 42 through bearings.

[0095] In a preferred embodiment, the first adjusting component 20 further includes a pressure sensor for detecting the lifting rope 30;

[0096] The controller receives detection signals from multiple pressure sensors and controls the movement of the adjusting block 43 corresponding to the maximum force lifting rope 30 or the minimum force lifting rope 30.

[0097] Example 1

[0098] like Figure 6As shown, when the number of first adjustment components 20 is even, as shown in the figure, the first adjustment components 20 are set to four groups, and the connection points of the four hoisting ropes A, B, C, D with the hoisting plate group are A, B, C, D respectively, and the hoisting points with the hoisting object 50 are a, b, c, d respectively, and the connection points A and C are opposite each other, and the center of gravity M of the hoisting object 50 is biased towards the hoisting point a;

[0099] When hoisting an irregularly eccentric object, the pressure sensor detects that the tension of hoisting rope A is relatively large and the tension of hoisting rope C is relatively small. The support slider 21 connected to hoisting rope A moves further outward in the radial direction. At this time, the connection point a and the length of hoisting rope A change. By changing the hoisting angle, the stress on hoisting rope A is reduced, and the adaptive adjustment of the irregularly eccentric object is achieved.

[0100] The pressure sensor detects the tension of the lifting rope A. When the detected tension is still too high or exceeds a certain range, or when the difference between the maximum and minimum tension of the lifting rope 30 is greater than a certain range, the controller controls the corresponding adjusting block 43 to move. That is, the lifting point a moves outward, away from the center of gravity M of the object being lifted 50, reducing the tension on the lifting rope A. Alternatively, the controller controls the corresponding adjusting block 43 to move inward, that is, the lifting point c moves closer to the center of gravity M of the object being lifted 50, so that the tension on the lifting rope A and the lifting rope C is redistributed, preventing the lifting rope A from breaking due to excessive tension. When the detected tension decreases or falls within a certain range, or when the difference between the maximum and minimum tension of the lifting rope 30 is less than a certain range, the controller controls the adjusting block 43 to stop moving. When the adjusting block 43 moves, and the detected tension is still too high or exceeds a certain range, or when the difference between the maximum and minimum tension of the lifting rope 30 is greater than a certain range, the controller controls the issuance of an alarm signal.

[0101] Example 2

[0102] When the first adjusting component 20 is an odd number greater than 2, the first adjusting component 20 is divided into three groups, and the lifting points of the three lifting ropes A, B, and C with the lifting plate group are A, B, and C respectively, and the lifting points with the object 50 are a, b, and c respectively. The center of gravity M of the object 50 is biased towards the lifting point a.

[0103] When hoisting an irregularly eccentric object, the pressure sensor detects that the hoisting rope A is under relatively large tension, and the support slider 21 connected to the hoisting rope A moves further outward in the radial direction. At this time, the hoisting point a and the length of the hoisting rope A change, so as to reduce the force on the hoisting rope A and realize the adaptive adjustment of the irregularly eccentric object.

[0104] The pressure sensor detects the tension of lifting ropes A, B, and C, assuming that the tension of lifting rope B is relatively small. If, after detection, the tension of lifting rope A is still large or exceeds a certain range, or the difference between the maximum and minimum stress of lifting rope 30 exceeds a certain range, the controller controls the corresponding adjusting block 43 to move. This means lifting point a moves outward, away from the center of gravity M of the object 50, reducing the stress on lifting rope A. Alternatively, the controller controls the adjusting block 43 corresponding to lifting rope B to move inward, bringing lifting point b closer to the object 50. The center of gravity M of 0 causes a redistribution of force on lifting ropes A, B, and C, preventing lifting rope A from breaking due to excessive force. When the detected tension decreases or falls within a certain range, or when the difference between the maximum and minimum tension of lifting rope 30 is less than a certain range, the controller stops the movement of adjusting block 43. When adjusting block 43 moves, if the detected tension is still large or exceeds a certain range, or when the difference between the maximum and minimum tension of lifting rope 30 is greater than a certain range, the controller issues an alarm signal.

[0105] like Figure 1 , Figure 2 As shown, in the preferred embodiment, the hoisting plate assembly has a support plate 11 and a hoisting plate 12;

[0106] The lifting plate 12 has a worm gear structure and is provided with a radially movable lifting point. Its lower end rotates on the support plate 11 through the slewing bearing 13.

[0107] The driven worm 14 on the support plate 11 is meshed with the worm wheel;

[0108] Specifically, pressure sensors detect the force on multiple lifting ropes 30 and determine the approximate position of the center of gravity of the object 50 to be lifted based on the force. Subsequently, the worm gear structure drives the lifting plate 12 to rotate, and the lifting point moves laterally on the lifting plate 12 to approach the center of gravity of the object 50. For example, the lifting plate 12 rotates first, so that the radial movement trajectory of the lifting point passes through the lifting point of the lifting ropes 30 and the support plate 11. Then, the lifting point moves radially to a suitable position, so that the difference between the maximum and minimum force on the lifting ropes 30 is less than a certain range. The lifting plate assembly is used to adjust the position of the lifting point to avoid excessive deviation between the lifting point and the center of gravity of the object 50, which could cause tilting or overturning. It can be noted that the radial movement of the lifting point can also adopt a structure similar to that of the drive component.

[0109] When using this adaptive lifting mechanism for irregularly eccentric objects, the specific steps include:

[0110] S1, initially, under the action of the first spring 222 and the second spring 232, multiple first piston rods 221 are close to the center line of the lifting plate assembly, and the second piston rods 231 are close to the support slider 21; multiple adjusting blocks 43 are located in the middle of the lifting block 41;

[0111] One end of the lifting rope 30 is connected to the object being lifted 50 via the second adjusting component 40;

[0112] S2, when hoisting an irregularly eccentric object, the second cylinder 23 rotates to match the force on the hoisting rope 30 and keep it taut. Each hoisting rope 30 drives the second piston rod 231 to extend and move, and compresses the second spring 232. At this time, hydraulic oil enters the first cylinder 22 from the second cylinder 23 and causes the first piston rod 221 to extend and move. The first piston rod 221 drives the support slider 21 and the second cylinder 23 to move away from the center line of the hoisting plate group, so that each hoisting rope 30 can lift and bear the force on the object 50.

[0113] S3, the pressure sensor detects the stress condition of each lifting rope 30 to determine the lifting rope 30 with the maximum stress and the lifting rope 30 with the minimum stress;

[0114] When the lifting rope 30 under the greatest force is in conjunction with the first piston rod 221 and the second piston rod 231, the corresponding support slider 21 moves radially further away from the center line of the lifting plate assembly. At this time, the connection point and length of the lifting rope 30 change, which causes the lifting angle to change and the force on the lifting rope 30 to decrease, so that the irregular eccentric object can be self-adaptively adjusted during lifting.

[0115] S4, when the pressure sensor detects that the tension of a single lifting rope 30 is large, or the difference between the maximum and minimum tension of the lifting rope 30 is greater than a certain range, the controller controls the adjusting block 43 connected to the lifting rope 30 with the maximum tension to move away from the center line of the lifting plate group, or controls the adjusting block 43 connected to the lifting rope 30 with the minimum tension to move closer to the center line of the lifting plate group, thereby changing the lifting point of the lifting rope 30 with the maximum or minimum tension, so that the tension of each lifting rope 30 is redistributed;

[0116] When the pressure sensor detects that the tension of a single lifting rope 30 meets the requirements, or when the difference between the maximum and minimum force of the lifting rope 30 is less than a certain range, the controller controls the corresponding adjusting block 43 to stop moving.

[0117] When the adjusting block 43 moves, if the pressure sensor detects that the tension of a single hoisting rope 30 is still too large, or the difference between the maximum and minimum force of the hoisting rope 30 is still greater than a certain range, the controller will issue an alarm signal.

[0118] S5, after the irregular eccentric object is lifted, the lifting rope 30 is detached from the object 50, the second adjusting component 40 returns to the initial position, and under the action of the first spring 222 and the second spring 232, the first adjusting component 20 returns to the initial position.

[0119] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

Claims

1. An adaptive lifting mechanism for irregularly eccentric objects, characterized in that, include: hoisting of the slab assembly; The first adjusting component (20) consists of at least two sets, which are evenly arranged circumferentially below the lifting plate assembly; Each first adjusting component (20) has a first piston rod (221), a support slider (21) connected to the end of the first piston rod (221), a second cylinder (23) rotatably mounted on the support slider (21), and a second piston rod (231); Under the action of the first piston rod (221), the support slider (21) moves radially along the center line of the hoisting plate group and is initially close to the center line of the hoisting plate group due to elastic force; the second piston rod (231) slides coaxially on the second cylinder (23) and is initially close to the support slider (21) due to elastic force. The second piston rod (231) extends and retracts simultaneously with the first piston rod (221), and the lower end of the second piston rod (231) is connected to the hoisting object (50) via a hoisting rope (30).

2. The adaptive lifting mechanism for irregularly eccentric objects according to claim 1, characterized in that, The first adjusting component (20) also has a first cylinder (22) containing hydraulic oil; The end of the first piston rod (221) slides and seals the first cylinder (22) into two cavities, and a first spring (222) is provided in the cavity away from the center line of the hoisting plate group; The end of the second piston rod (231) slides and seals the second cylinder (23) into two cavities, and a second spring (232) is provided in the cavity away from the supporting slider (21); The cavity containing hydraulic oil in the second cylinder (23) and far from the support slider (21) is connected to the cavity of the second cylinder (23) near the center line of the lifting plate group through the first pipeline. The cavity near the support slider (21) is connected to the cavity of the second cylinder (23) far from the center line of the lifting plate group through the second pipeline.

3. The adaptive lifting mechanism for irregularly eccentric objects according to claim 2, characterized in that, The inner diameter of the second cylinder (23) is larger than that of the first cylinder (22); The elastic coefficient of the second spring (232) is greater than that of the first spring (222).

4. The adaptive lifting mechanism for irregularly eccentric objects according to claim 3, characterized in that, The first cylinder (22) is provided with a first fixing ring that limits the extension of the first piston rod (221); The second cylinder (23) is provided with a second fixing ring that limits the extension of the second piston rod (231).

5. The adaptive lifting mechanism for irregularly eccentric objects according to claim 2, characterized in that, A second adjusting component (40) is provided between the lifting rope (30) and the object being lifted (50); The second adjustment component (40) has an adjustment block (43) connected to the drive component and a lifting block (41) fixed to the hoisting object (50); The hoisting rope (30) is connected to the adjusting block (43); Under the action of the driving component, the adjusting block (43) moves closer to or further away from the center line of the lifting plate assembly on the lifting block (41).

6. The adaptive lifting mechanism for irregularly eccentric objects according to claim 5, characterized in that, The driving component includes a screw rod (45) and a drive motor (44); The drive motor (44) is fixed on the lifting block (41), and its output end is rotatably arranged and threadedly connected to the adjusting block (43).

7. The adaptive lifting mechanism for irregularly eccentric objects according to claim 5, characterized in that, The first adjustment component (20) also has a pressure sensor for detecting the lifting rope (30); The controller receives detection signals from multiple pressure sensors and controls the movement of the adjusting block (43) corresponding to the maximum force lifting rope (30) or the adjusting block (43) corresponding to the minimum force lifting rope (30).

8. An adaptive lifting mechanism for irregularly eccentric objects according to any one of claims 1 to 7, characterized in that, The hoisting plate assembly includes a support plate (11) and a hoisting plate (12); The lifting plate (12) is a worm gear structure and is provided with a radially movable lifting point. Its lower end rotates on the support plate (11) through a slewing bearing (13). The worm (14) driven on the support plate (11) is meshed with the worm wheel.

9. A method of using the adaptive lifting mechanism for irregularly eccentric objects as described in claim 7, characterized in that, Specifically, the following steps are included: S1, initially, under the action of the first spring (222) and the second spring (232), multiple first piston rods (221) are close to the center line of the lifting plate assembly, and the second piston rods (231) are close to the support slider (21); multiple adjusting blocks (43) are located in the middle of the lifting block (41); One end of the hoisting rope (30) is connected to the hoisting object (50) via the second adjusting component (40); S2, when hoisting an irregularly eccentric object, the second cylinder (23) rotates to match the force on the hoisting rope (30) and keep it taut. Each hoisting rope (30) drives the second piston rod (231) to extend and move, and compresses the second spring (232). At this time, hydraulic oil enters the first cylinder (22) from the second cylinder (23) and causes the first piston rod (221) to extend and move. The first piston rod (221) drives the support slider (21) and the second cylinder (23) to move away from the center line of the hoisting plate group, so that each hoisting rope (30) can lift and bear the force on the hoisted object (50). S3, the pressure sensor detects the stress condition of each lifting rope (30) and determines the lifting rope (30) with the maximum stress and the lifting rope (30) with the minimum stress; When the first piston rod (221) and the second piston rod (231) are linked together, the corresponding support slider (21) moves further away from the center line of the lifting plate group. At this time, the connection point and length of the lifting rope (30) change, which causes the lifting angle to change. The force on the lifting rope (30) will decrease, so that the irregular eccentric object can be self-adaptively adjusted when being lifted. S4, when the pressure sensor detects that the tension of a single lifting rope (30) is large, or the difference between the maximum and minimum force of the lifting rope (30) is greater than a certain range, the controller controls the adjusting block (43) connected to the lifting rope (30) with the maximum force to move away from the center line of the lifting plate group, or controls the adjusting block (43) connected to the lifting rope (30) with the minimum force to move closer to the center line of the lifting plate group, thereby changing the lifting point of the lifting rope (30) with the maximum or minimum force, so that the force of each lifting rope (30) is redistributed; When the pressure sensor detects that the tension of a single hoisting rope (30) meets the requirements, or when the difference between the maximum and minimum tension of the hoisting rope (30) is less than a certain range, the controller controls the corresponding adjusting block (43) to stop moving. When the adjusting block (43) moves, if the pressure sensor detects that the tension of a single hoisting rope (30) is still too large, or if the difference between the maximum and minimum force of the hoisting rope (30) is still greater than a certain range, the controller will issue an alarm signal. S5, after the irregular eccentric object is lifted, the lifting rope (30) is detached from the object (50), the second adjusting component (40) returns to the initial position, and under the action of the first spring (222) and the second spring (232), the first adjusting component (20) returns to the initial position.

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