Control method of lifting device

Abstract

According to the control method of the lifting device, an air cylinder shaft of a limiting air cylinder in a limiting assembly drives an inner side telescopic shaft to upwards stretch out to move by a first vertical stroke, so that the top of the telescopic shaft is flush with the top of the corresponding side of a material; an air cylinder shaft of a limiting air cylinder in the limiting assembly drives an inner side telescopic shaft to upwards stretch out to move by a second vertical stroke, so that the top of the telescopic shaft is higher than the top of the corresponding side of the material, and a safe distance exists between the top of the telescopic shaft and the top of the corresponding side of the material; by means of the limiting assembly, the top height of the telescopic shaft in the limiting assembly can be always higher than the top height of materials, the internal materials are completely wrapped, stable and effective limiting effects are achieved, the possibility that the materials are disengaged unexpectedly is reduced, the possibility that disintegrating slag falls off due to the fact that the telescopic shaft makes contact with the materials in the lifting process can be reduced, and the service life of the materials is prolonged. And the damage to the lifting environment is reduced as much as possible while the stable self-lifting effect of the materials is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting device control technology, and in particular to a lifting device control method. Background Art

[0002] The lifting device is a device that places materials on the top of the lifting device and lifts the materials to a preset height through operations such as limiting and clamping.

[0003] During the operation of the lifting device, the following defects and shortcomings still exist: 1) The limiting effect on the inner material is not perfect, and it is impossible to achieve an effective and stable limiting effect on the internal material during the clamping and lifting process, which causes the risk of unexpected material escape from the top of the lifting device and the fall of material debris, which affects the lifting effect of the material itself and also damages the lifting environment; 2) It is difficult to achieve a stable clamping effect on the lifted material. If the clamping component clamps the internal material too loosely, the material will shake left and right during the lifting process, resulting in risks such as eccentricity and looseness. If the clamping component clamps the internal material too tightly, it will threaten to damage the clamping component and the appearance of the material, reduce the service life of the clamping component, and affect the subsequent processing quality of the material. 3) It is impossible to predict the safety and stability of the overall lifting process, which poses a safety threat and reduces the lifting efficiency and stability.

[0004] Therefore, there is an urgent need to provide a control method for a lifting device to solve the defects and shortcomings in the above-mentioned prior art. Summary of the invention

[0005] In order to solve the defects and shortcomings in the prior art, the present invention provides a control method for a lifting device.

[0006] The specific scheme provided by the present invention is: A method for controlling a lifting device, characterized in that it comprises the following steps: S1: Place the material to be lifted at the center of the top of the bottom shaft of the lifting device, and ensure that the outer casing of the bottom shaft has been squeezed and deformed; S2: The material is moved by the bottom rotating shaft until the lifting device is located at the preset axial position of the material, and the bottom rotating shaft is controlled to be locked so that it cannot rotate; S3: Detect the material size and determine the relationship between the material size and the limit component: When the opening condition is met, the limit component is opened; When the opening conditions are not met, the user is alerted; S4: The cylinder shaft of the limit cylinder in the limit assembly drives the inner telescopic shaft to extend upward and move vertically for a first stroke, so that the top of the telescopic shaft is flush with the top of the corresponding side of the material; S5: The cylinder shaft of the limit cylinder in the limit assembly drives the inner telescopic shaft to extend upward and move vertically for the second stroke, so that the top of the telescopic shaft is higher than the top of the corresponding side of the material and there is a safety distance; S6: Start the clamping assembly, and drive the clamping slide blocks on both sides of the top to move toward each other in the first horizontal stroke by retracting the cylinder shaft of the clamping cylinder in the clamping assembly downward, so that the outer casings of the telescopic shafts on both sides abut against the material without being squeezed and deformed; S7: The cylinder shaft of the clamping cylinder in the clamping assembly continues to retract downward, driving the clamping slide blocks on both sides of the top to move toward each other in the second horizontal stroke, so that the outer casings of the telescopic shafts on both sides are squeezed with the material and deformed; S8: Control and lock the telescopic shafts on both sides so that they cannot rotate; S9: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to the preset target height; S10: reversely start the clamping assembly, and the cylinder shaft of the clamping cylinder in the clamping assembly extends upward to drive the clamping slide blocks on both sides of the top to move away from each other, so that the outer casings of the telescopic shafts on both sides are out of contact with the material; S11: Reversely start the limit assembly, and drive the inner telescopic shaft to retract downward through the cylinder shaft of the limit cylinder in the limit assembly, so that the top of the telescopic shaft is lower than the top of the bottom rotating shaft, so as to facilitate the removal of the top material.

[0007] As a further preferred embodiment of the present invention, in step S3, the start condition includes: 1) The material height is within the limit height travel range of the limit component, and the material height is less than 2 / 3 of the maximum limit height of the limit component; 2) The material width is within the limit width travel range of the limit component, and the sum of the distances between the material and the limit components on both sides is greater than 1 / 2 of the maximum limit width of the limit component.

[0008] As a further preferred embodiment of the present invention, in the steps S4-S5, 1) When the heights of the materials on both sides are equal, the rising strokes and rising speeds of the telescopic shafts on both sides are the same; 2) When the heights of the two sides of the material are not equal, the rising stroke of the telescopic shaft on the high-height side is greater than that on the low-height side, and the rising speed of the telescopic shaft on the high-height side is greater than that on the low-height side.

[0009] As a further preferred embodiment of the present invention, the steps S4-S5 satisfy the following: The first vertical stroke is greater than the second vertical stroke; and The rising speed of the telescopic shafts on both sides in the vertical first stroke is greater than the rising speed of the telescopic shafts on both sides in the vertical second stroke.

[0010] As a further preferred embodiment of the present invention, the steps S5-S6 satisfy the following: The first horizontal stroke is greater than the second horizontal stroke; and The speed at which the clamping slide blocks on both sides move toward each other in the first horizontal stroke is greater than the speed at which the clamping slide blocks on both sides move toward each other in the second horizontal stroke.

[0011] As a further preferred embodiment of the present invention, the step S9 includes the following steps: S9.1: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to a first preset height, and the lifting parameters in the process are judged. When the lifting conditions are met, the next step is performed; S9.2: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to the preset target height; And the first preset height is less than the preset target height.

[0012] As a further preferred embodiment of the present invention, in step S9.1, the lifting parameters in the process of lifting the material to the first preset height at least include: material position parameters, casing parameters and environmental parameters.

[0013] As a further preferred embodiment of the present invention, in step S9.1, the lifting conditions in the process of lifting the material to the first preset height at least include: 1) The material has not changed in height, level and front and back position; 2) The extrusion conditions of the outer casing of the bottom rotating shaft and the outer casing of the telescopic shafts on both sides did not change; 3) No abnormal noise is produced.

[0014] As a further preferred embodiment of the present invention, in the steps S9.1 to S9.2, the lifting speed in the process of lifting the material to the first preset height is lower than the lifting speed in the process of lifting the material to the preset target height.

[0015] As a further preferred embodiment of the present invention, in the step S10, when the outer casings of the telescopic shafts on both sides are out of contact with the material, the telescopic shafts on both sides are controlled to rotate for a preset time.

[0016] Compared with the prior art, the present invention can achieve the following technical effects: 1) The present invention provides a control method for a lifting device, wherein the cylinder shaft of a limiting cylinder in a limiting assembly drives the inner telescopic shaft to extend upward and move through a first vertical stroke, so that the top of the telescopic shaft is flush with the top of the corresponding side of the material, and the cylinder shaft of the limiting cylinder in the limiting assembly drives the inner telescopic shaft to extend upward and move through a second vertical stroke, so that the top of the telescopic shaft is higher than the top of the corresponding side of the material and there is a safety gap, so that when the limiting assembly provides a limiting effect for the internal material, the top height of the telescopic shaft in the limiting assembly can always be higher than the top height of the material, while achieving a complete covering and stable and effective limiting effect on the internal material, reducing the possibility of unexpected material escape, and reducing the possibility of debris falling due to the contact between the telescopic shaft and the material during the lifting process. In addition, even if debris is generated in the process, the debris can be limited to the top of the lifting device as much as possible, ensuring the stability of the lifting effect of the material itself while minimizing the damage to the lifting environment.

[0017] 2) The present invention provides a control method for a lifting device, wherein the cylinder axis of the clamping cylinder in the clamping assembly retracts downward to drive the clamping sliders on both sides of the top to move toward each other in a first horizontal stroke, so that the outer casings of the telescopic shafts on both sides abut against the material but are not squeezed and deformed, and the cylinder axis of the clamping cylinder in the clamping assembly continues to retract downward to drive the clamping sliders on both sides of the top to move toward each other in a second horizontal stroke, so that the outer casings of the telescopic shafts on both sides are squeezed and deformed against the material, thereby effectively ensuring a stable clamping effect on the material to be lifted, and the clamping sliders on both sides move toward each other in the first horizontal stroke to make the clamping assembly contact with the material but not clamped, and then the clamping sliders on both sides move toward each other in the second horizontal stroke to clamp the material in place, thereby ensuring stable clamping of the material while minimizing damage to the clamping assembly and the appearance of the material.

[0018] 3) The present invention provides a control method for a feeding device, wherein the electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to a first preset height, and the lifting parameters in the process are judged. When the lifting conditions are met, the next step is performed; and the electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to a preset target height, so that during the lifting process, a test lifting stroke to the first preset height is set, so as to predict the subsequent stable lifting stroke to determine whether unexpected changes occur in the material position parameters, casing parameters and environmental parameters in the process, and then the subsequent stable lifting stroke is predicted in advance to effectively ensure the lifting efficiency and stability of the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A flow chart of the steps of the control method provided by the present invention.

[0020] Figure 2 This is a front structural stereogram of the lifting device provided by the present invention.

[0021] Figure 3 This is a structural rear view of the lifting device provided by the present invention. DETAILED DESCRIPTION

[0022] 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.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] [First embodiment] like Figure 1-3 A control method for a lifting device provided by a first embodiment of the present invention is shown, comprising the following steps: S1: Place the material to be lifted at the top center of the bottom shaft (not shown) of the lifting device, and ensure that the outer casing 1 of the bottom shaft has been squeezed and deformed, so as to ensure that the material to be lifted is located at the center of the top of the bottom shaft, so as to facilitate the uniform clamping effect of the subsequent clamping components on both sides. Ensuring that the outer casing of the bottom shaft has been squeezed and deformed can ensure that the material to be lifted is supported evenly and stably at the top of the bottom shaft; in this embodiment, the material to be lifted is a hollow square tube with a long strip shape and uniform mass distribution along the axial direction. Those skilled in the art may also select other materials for the material to be lifted according to actual use requirements; S2: The material is driven to move by the bottom rotating shaft until the lifting device is located at the preset axial position of the material, so that the lifting device can be evenly distributed in the axial direction of the material, and then the bottom rotating shaft is controlled and locked so that it cannot rotate, so as to avoid the adverse effects that may be caused by the unexpected rotation of the casing around the bottom rotating shaft during the subsequent limiting, clamping and lifting processes; S3: Detect the material size and determine the relationship between the material size and the limit component: when the opening condition is met, the limit component is opened; when the opening condition is not met, an alarm is issued to the user; In this embodiment, the start conditions include: 1) The material height is within the limit height range of the limit assembly, and the material height is less than 2 / 3 of the maximum limit height of the limit assembly; this setting can ensure that the top height of the telescopic shaft in the limit assembly can always be higher than the top height of the material, while achieving a complete covering and stable and effective limit effect on the internal material, reducing the possibility of unexpected material escape, and also reducing the possibility of debris falling due to contact between the telescopic shaft and the material during the lifting process. In addition, even if debris is generated during the process, the debris can be limited to the top of the lifting device as much as possible, ensuring the stability of the material's own lifting effect while minimizing the damage to the lifting environment; 2) The material width is within the limit width travel range of the limit assembly, and the sum of the distances between the material and the limit assemblies on both sides is greater than 1 / 2 of the maximum limit width of the limit assembly. This setting provides movement space for the subsequent first and second horizontal strokes of the clamping slides on both sides to move toward each other, so as to ensure that the clamping assembly and the material are clamped in place and stably, while minimizing damage to the appearance of the clamping assembly and the material; S4: The cylinder shaft 22 of the limit cylinder 21 in the limit assembly 2 drives the inner telescopic shaft (not shown in the figure, which can be telescopically moved and can also be rotated by the top motor drive) to extend upward and move the first vertical stroke, so that the top of the telescopic shaft is flush with the top of the corresponding side of the material; S5: The cylinder shaft 22 of the limit cylinder 21 in the limit assembly 2 drives the inner telescopic shaft to extend upward and move vertically for a second stroke, so that the top of the telescopic shaft is higher than the top of the corresponding side of the material and there is a safety distance; Therefore, when the limiting component provides a limiting effect for the internal material, the top height of the telescopic shaft in the limiting component can always be higher than the top height of the material, and the internal material can be completely covered and stably and effectively limited, while reducing the possibility of unexpected material escape, and the possibility of the telescopic shaft contacting the material during the lifting process causing debris to fall. In addition, even if debris is generated during the process, the debris can be limited to the top of the lifting device as much as possible, ensuring the stability of the lifting effect of the material itself while minimizing the damage to the lifting environment. And satisfy: The first vertical stroke is greater than the second vertical stroke. This is because the first vertical stroke is often equal to the height of the material, and the second vertical stroke is used to strengthen the limiting effect of the limiting component. It does not require too much stroke to avoid wasting the limiting space. At the same time, too large a vertical stroke will also have an adverse effect on the limiting stability of the limiting component. The rising speed of the telescopic shafts on both sides in the first vertical stroke is greater than the rising speed of the telescopic shafts on both sides in the second vertical stroke. Since the second vertical stroke is smaller than the first vertical stroke, the smaller rising speed is more conducive to the movement of the second vertical stroke. At the same time, the smaller rising speed is also conducive to reducing the adverse effects such as shaking and deviation that may be caused to the material on the bottom rotating shaft; Preferably, in steps S4-S5, 1) When the heights of the materials on both sides are equal, the rising strokes and rising speeds of the telescopic shafts on both sides are the same, so as to achieve the effect of uniform limiting on both sides; 2) When the heights of the two sides of the material are not the same, the rising stroke of the telescopic shaft on the high-height side is greater than that on the low-height side, and the rising speed of the telescopic shaft on the high-height side is greater than that on the low-height side, so that the telescopic shafts on both sides can reach the top limit position at the same time, improving work efficiency and facilitating the subsequent opening action of the clamping assembly; S6: Start the clamping assembly 3, and the cylinder shaft 32 of the clamping cylinder 31 in the clamping assembly 3 retracts downward, driving the clamping slide blocks 33 on both sides of the top to move toward each other in the first horizontal stroke, so that the outer casings 34 of the telescopic shafts on both sides abut against the material without being squeezed and deformed; S7: The cylinder shaft 32 of the clamping cylinder 31 in the clamping assembly 3 continues to retract downward, driving the clamping slide blocks 33 on both sides of the top to move toward each other in the second horizontal stroke, so that the outer casings 34 of the telescopic shafts on both sides are squeezed with the material and deformed; Thereby, the stable clamping effect of the material to be lifted is effectively ensured. The clamping sliders on both sides move toward each other in the first horizontal stroke, so that the clamping assembly is in contact with the material but not clamped. Then, the clamping sliders on both sides move toward each other in the second horizontal stroke, so that the clamping assembly and the material are clamped in place, thereby ensuring stable clamping of the material while minimizing damage to the clamping assembly and the appearance of the material; Preferably, in this step, The first horizontal stroke is greater than the second horizontal stroke. Since the first horizontal stroke makes the clamping assembly contact the material in place but not clamped, while the second horizontal stroke makes the clamping assembly and the material clamped in place to achieve the deformation of the outer casings of the telescopic shafts on both sides by squeezing, the first horizontal stroke needs to be set to be much greater than the second horizontal stroke. The speed of the clamping slide blocks moving toward each other in the first horizontal stroke is greater than the speed of the clamping slide blocks moving toward each other in the second horizontal stroke. At this time, since the first horizontal stroke is greater than the second horizontal stroke, it is correspondingly necessary to set the speed of the clamping slide blocks moving toward each other in the first horizontal stroke to be greater than the speed of the clamping slide blocks moving toward each other in the second horizontal stroke. At the same time, the second horizontal stroke enables the clamping assembly and the material to be clamped in place, so that the outer casings of the telescopic shafts on both sides are squeezed and deformed. The smaller the speed of the clamping slide blocks moving toward each other on both sides, the more stable the deformation tends to be. In addition, the smaller the speed of the clamping slide blocks moving toward each other on both sides is also conducive to reducing the risk of material debris falling due to contact between the clamping assembly and the material. S8: Control and lock the telescopic shafts on both sides so that they cannot rotate, so as to avoid the adverse effects that may be caused by the unexpected rotation of the casing around the telescopic shafts on both sides during the subsequent lifting process; S9: The electric cylinder shaft 42 of the electric cylinder 41 in the lifting assembly 4 drives the top and bottom rotating shafts to lift the material to a preset target height; including the following steps: S9.1: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to a first preset height, and the lifting parameters in the process are judged. When the lifting conditions are met, the next step is performed; in this embodiment, the lifting parameters in the process of lifting the material to the first preset height include at least: material position parameters, casing parameters and environmental parameters; wherein the material position parameters include the height, horizontal and front and rear positions of the material, and the casing parameters include the extrusion conditions of the outer casing of the bottom rotating shaft and the outer casing of the telescopic shafts on both sides, which respectively determine the position stability and clamping stability of the material during the lifting process according to the material position and the casing extrusion conditions, and the environmental parameters include at least abnormal noises, etc., which can help to assist in judging the position stability and clamping stability of the material during the lifting process; Therefore, correspondingly, the lifting conditions in the process of lifting the material to the first preset height at least include: 1) The material has not changed in height, level and front and back position; 2) The extrusion conditions of the outer casing of the bottom rotating shaft and the outer casing of the telescopic shafts on both sides did not change; 3) No abnormal noise is produced.

[0026] S9.2: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to the preset target height; And the first preset height is less than the preset target height; Therefore, during the lifting process, a test lifting stroke is set to rise to the first preset height, so as to predict the subsequent stable lifting stroke to determine whether unexpected changes occur in the material position parameters, casing parameters and environmental parameters during the process, and then predict the subsequent stable lifting stroke in advance to effectively ensure the lifting efficiency and stability of the lifting process. As a further preference of this embodiment, the lifting speed in the process of lifting the material to the first preset height is less than the lifting speed in the process of lifting the material to the preset target height. Corresponding to the first preset height being less than the preset target height, it is also beneficial to ensure the stability of a longer stable lifting process through a shorter test stroke. S10: Reversely start the clamping assembly, and the cylinder shaft of the clamping cylinder in the clamping assembly extends upward to drive the clamping sliders on both sides of the top to move away from each other, so that the outer casings of the telescopic shafts on both sides are out of contact with the material; when the outer casings of the telescopic shafts on both sides are out of contact with the material, the telescopic shafts on both sides are controlled to rotate for a preset time, so that the material debris adhering to the outer casings of the telescopic shafts on both sides can be removed in this way, and at the same time, it can also be checked whether the telescopic shafts on both sides are unexpectedly damaged before and after the clamping process; S11: Reversely start the limit assembly, and drive the inner telescopic shaft to retract downward through the cylinder shaft of the limit cylinder in the limit assembly, so that the top of the telescopic shaft is lower than the top of the bottom rotating shaft, so as to facilitate the removal of the top material.

[0027] It is worth noting that the protective sleeves mentioned in this embodiment are all made of elastic and deformable materials and are fixed at the outer circumference of the corresponding rotating shaft.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for controlling a lifting device, characterized in that: The following steps are involved: S1: Place the material to be lifted at the center of the top of the bottom shaft of the lifting device, and ensure that the outer casing of the bottom shaft has been squeezed and deformed; S2: The material is moved by the bottom rotating shaft until the lifting device is located at the preset axial position of the material, and the bottom rotating shaft is controlled to be locked so that it cannot rotate; S3: Detect the material size and determine the relationship between the material size and the limit component: When the opening condition is met, the limit component is opened; When the opening conditions are not met, the user is alerted; S4: The cylinder shaft of the limit cylinder in the limit assembly drives the inner telescopic shaft to extend upward and move vertically for a first stroke, so that the top of the telescopic shaft is flush with the top of the corresponding side of the material; S5: The cylinder shaft of the limit cylinder in the limit assembly drives the inner telescopic shaft to extend upward and move vertically for the second stroke, so that the top of the telescopic shaft is higher than the top of the corresponding side of the material and there is a safety distance; S6: Start the clamping assembly, and drive the clamping slide blocks on both sides of the top to move toward each other in the first horizontal stroke by retracting the cylinder shaft of the clamping cylinder in the clamping assembly downward, so that the outer casings of the telescopic shafts on both sides abut against the material without being squeezed and deformed; S7: The cylinder shaft of the clamping cylinder in the clamping assembly continues to retract downward, driving the clamping slide blocks on both sides of the top to move toward each other in the second horizontal stroke, so that the outer casings of the telescopic shafts on both sides are squeezed with the material and deformed; S8: Control and lock the telescopic shafts on both sides so that they cannot rotate; S9: The electric cylinder shaft of the electric cylinder in the lifting component drives the top and bottom rotating shafts to lift the material to the preset target height; S10: reversely start the clamping assembly, and the cylinder shaft of the clamping cylinder in the clamping assembly extends upward to drive the clamping slide blocks on both sides of the top to move away from each other, so that the outer casings of the telescopic shafts on both sides are out of contact with the material; S11: Reversely start the limit assembly, and drive the inner telescopic shaft to retract downward through the cylinder shaft of the limit cylinder in the limit assembly, so that the top of the telescopic shaft is lower than the top of the bottom rotating shaft, so as to facilitate the removal of the top material.

2. A method for controlling a lifting device according to claim 1, characterized in that: In step S3, the start condition includes: 1) The material height is within the limit height travel range of the limit component, and the material height is less than 2 / 3 of the maximum limit height of the limit component; 2) The material width is within the limit width travel range of the limit component, and the sum of the distances between the material and the limit components on both sides is greater than 1 / 2 of the maximum limit width of the limit component.

3. The control method of a lifting device according to claim 1, characterized in that: In the steps S4-S5, 1) When the heights of the materials on both sides are equal, the rising strokes and rising speeds of the telescopic shafts on both sides are the same; 2) When the heights of the two sides of the material are not equal, the rising stroke of the telescopic shaft on the high-height side is greater than that on the low-height side, and the rising speed of the telescopic shaft on the high-height side is greater than that on the low-height side.

4. A method for controlling a lifting device according to claim 1, characterized in that: The steps S4-S5 satisfy: The first vertical stroke is greater than the second vertical stroke; and The rising speed of the telescopic shafts on both sides in the vertical first stroke is greater than the rising speed of the telescopic shafts on both sides in the vertical second stroke.

5. The control method of a lifting device according to claim 1, characterized in that: The steps S6-S7 satisfy: The first horizontal stroke is greater than the second horizontal stroke; and The speed at which the clamping slide blocks on both sides move toward each other in the first horizontal stroke is greater than the speed at which the clamping slide blocks on both sides move toward each other in the second horizontal stroke.

6. A method for controlling a lifting device according to claim 1, characterized in that: The step S9 includes the following steps: S9.1: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to a first preset height, and the lifting parameters in the process are judged. When the lifting conditions are met, the next step is performed; S9.2: The electric cylinder shaft of the electric cylinder in the lifting assembly drives the top and bottom rotating shafts to lift the material to the preset target height; And the first preset height is less than the preset target height.

7. A method for controlling a lifting device according to claim 6, characterized in that: In the step S9.1, the lifting parameters in the process of lifting the material to the first preset height include at least: material position parameters, casing parameters and environmental parameters.

8. The control method of a lifting device according to claim 6, characterized in that: In step S9.1, the lifting conditions in the process of lifting the material to the first preset height at least include: 1) The material has not changed in height, level and front and back position; 2) The extrusion conditions of the outer casing of the bottom rotating shaft and the outer casing of the telescopic shafts on both sides did not change; 3) No abnormal noise is produced.

9. A method for controlling a lifting device according to claim 6, characterized in that: In the steps S9.1 to S9.2, the lifting speed in the process of lifting the material to the first preset height is lower than the lifting speed in the process of lifting the material to the preset target height.

10. The control method of a lifting device according to claim 1, characterized in that: In the step S10, when the outer casings of the telescopic shafts on both sides are out of contact with the material, the telescopic shafts on both sides are controlled to rotate for a preset time.

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