Hoisting device for crane and hoisting method thereof

Abstract

The invention discloses a hoisting device for a crane and a hoisting method of the hoisting device, and relates to the technical field of crane hoisting accessories. The multiple clamping units are arranged in the profiling inner supporting units, simulation profiling can be conducted according to the shape of the inner wall of the cylinder sleeve before hoisting, and therefore the outer wall shapes of the multiple profiling inner supporting units can be matched with the shape of the inner wall of the cylinder sleeve, and when the profiling inner supporting units make contact with the inner wall of the cylinder sleeve, the clamping units can clamp the inner wall of the cylinder sleeve. The clamping units in multiple positions can abut against the inner wall of the cylinder sleeve, the multi-point expanding and clamping effect is achieved, accordingly, the friction force between the profiling inner supporting units and the inner wall of the cylinder sleeve can be increased, it is guaranteed that the hoisting mechanism can be stably connected with the cylinder sleeve, the situation that the cylinder sleeve and the hoisting mechanism are accidentally separated in the hoisting process is avoided, and the hoisting efficiency is improved. And meanwhile, acting force generated in the hoisting process is evenly dispersed to the multiple clamping point positions, and the situation that the inner wall of the cylinder sleeve is damaged due to the fact that the clamping force is excessively concentrated is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of crane hoisting accessories, in particular to a hoisting device for a crane and a hoisting method thereof. Background Art

[0002] A crane is a machine used to lift or move heavy objects. It is widely used in factories, warehouses, docks, stations, construction sites and other scenarios. It can perform operations such as hanging, lifting, lowering and translating heavy objects. Depending on the different loads lifted by the crane, different lifting devices need to be selected to ensure that the lifting process can be carried out safely and stably.

[0003] Among them, cylinder liner lifting is an important operation in the process of diesel engine maintenance and replacement. It requires the use of specific lifting tools and methods to move the cylinder liner safely and effectively.

[0004] A cylinder liner inner cone lifting device disclosed in the patent application with reference publication number CN220182565U is characterized in that the entire device is placed in the cylinder liner, and then a hand wheel is rotated to drive the hand wheel shaft, the hand wheel shaft drives the center cone shaft, the center cone shaft drives the threaded shaft, the threaded shaft moves downward under the action of the thread, thereby driving the center cone shaft to move downward, and the center cone shaft pushes the center inner cone sleeves on both sides to move outward under the action of the inclined structure, and the center inner cone sleeve moves to both sides together with the nylon outer cone sleeve, thereby tightening the inner wall of the cylinder liner. When the entire device is tightened together with the cylinder liner, the lifting hole is lifted by a crane, so that the cylinder liner is lifted by the crane, thereby improving the rapid installation and disassembly of large cylinder liners, effectively improving the assembly efficiency, and having the characteristics of easy use and wide application range.

[0005] When the existing crane is used to hoist the cylinder liner, the inner wall of the cylinder liner is not in a regular plane shape but in an arc shape, so that when the hoisting device is used to hoist the cylinder liner, the hoisting device cannot be fully adapted to the inner wall of the cylinder liner, resulting in that only a local position of the hoisting device is in contact with the inner wall of the cylinder liner during the hoisting process using the internal expansion method, so that the friction between the inner wall of the cylinder liner and the hoisting device is small, and the hoisting device and the cylinder liner cannot be firmly locked. There is a risk of the cylinder liner falling during the hoisting process, and the local position where the hoisting device and the cylinder liner contact is concentrated with a large If force is used, the cylinder liner is easily damaged during the lifting process; for example, a cylinder liner inner cone lifting device with reference to publication number CN220182565U is used, which only uses the nylon outer cone sleeve to expand and establish a connection with the inner wall of the cylinder liner, and the nylon outer cone sleeve is conical in design, and the contact area between it and the inner wall of the cylinder liner is small, and it cannot form a stable connection with the inner wall of the cylinder liner, and the friction force is concentrated on the contact part between the nylon outer cone sleeve and the cylinder liner, so that the force is concentrated on a local area, which can easily cause the inner wall of the cylinder liner to be damaged due to excessive local force.

[0006] Therefore, the present invention provides a hoisting device for a crane and a hoisting method thereof to solve the above problems. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a lifting device for a crane and a lifting method thereof, which solves the problem that the inner wall of the cylinder liner is not in a regular plane shape but in an arc shape, so that when the cylinder liner is lifted by the lifting device, the lifting device cannot be fully adapted to the inner wall of the cylinder liner, resulting in only a local position of the lifting device contacting the inner wall of the cylinder liner during the lifting process using an internal expansion method, so that the friction between the inner wall of the cylinder liner and the lifting device is small, and the lifting device and the cylinder liner cannot be firmly locked. In addition, due to the concentration of a large force on the local position where the lifting device and the cylinder liner are in contact, the cylinder liner is easily damaged during the lifting process.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A hoisting device for a crane, comprising a hook and a cylinder sleeve, wherein a hoisting mechanism for hoisting the cylinder sleeve by internal expansion is also provided at the bottom of the hook, and the hoisting mechanism comprises: A suspension rod assembly is detachably arranged at the bottom of the hook to provide support during the lifting process; The profiling expansion assembly is sleeved on the outside of the boom assembly, and simulates the contour shape of the inner wall of the profiling cylinder liner before lifting, so that the outer contour shape after profiling is adapted to the inner wall contour shape of the cylinder liner, thereby completing the operation of firmly locking the cylinder liner; A power assembly is arranged inside the boom assembly and is used to control the extension or gathering of the contour expansion assembly to assist the contour expansion assembly to smoothly enter the cavity of the cylinder sleeve and complete the expansion locking operation; Furthermore, the boom assembly comprises: An upper suspension rod is arranged below the suspension hook, and a suspension ring is fixedly arranged on the top of the upper suspension rod, and the suspension ring can be detachably sleeved on the suspension hook; The cylinder is detachably arranged at the bottom end of the upper suspension rod through a first flange, and is used to provide space for the installation of a power component. A take-in and put-out port for convenient maintenance is provided on the outer wall of the cylinder. A protective cover is detachably arranged inside the take-in and put-out port by bolts, and a plurality of lifting grooves are evenly arranged on the outer wall of the cylinder and below the take-in and put-out port.

[0009] The lower suspension rod is detachably arranged at the bottom end of the cylinder barrel through the second flange, and is used to provide a bearing platform for the installation of the contour expansion assembly. The bottom end of the lower suspension rod is also fixedly provided with a base for limiting the position of the contour expansion assembly.

[0010] Furthermore, the contoured expansion assembly comprises: The sliding sleeve is arranged on the outer wall of the cylinder and is used to transmit the power output by the power component to other components; A plurality of contoured inner support units are evenly arranged below the sliding sleeve, each contoured inner support unit is rotationally connected to the sliding sleeve via a support arm, and each contoured inner support unit is rotationally connected to the outer wall of the lower suspension rod via a plurality of auxiliary support arms.

[0011] Furthermore, the contoured inner support unit comprises: The bearing sleeve is rotatably arranged on the outer wall of the sliding sleeve and the contoured inner support unit through the support arm and the auxiliary support arm respectively; The mounting box is detachably mounted on the outer wall of the bearing sleeve, a cover plate is detachably mounted on the outer wall of the bearing sleeve by bolts, and a plurality of circular mounting through holes are evenly opened on the outer wall of the cover plate, and a clamping unit for expanding and clamping the inner wall of the cylinder sleeve is arranged inside each of the circular mounting through holes; The position locking assembly is arranged inside the installation box and is used to lock or unlock the positions of multiple clamping units at the same time to facilitate the contouring operation of the multiple clamping units.

[0012] Furthermore, the clamping unit comprises: A clamping column, which slides through the circular mounting hole, and a rectangular strip is fixedly arranged at one end of the clamping column located inside the mounting box, a plurality of positioning teeth are evenly fixedly arranged on the top of the rectangular strip, and a guide hole is opened at one end of the rectangular strip away from the clamping column; A rubber protective sleeve is fixedly arranged at one end of the clamping column away from the positioning teeth, and is used to increase the friction between the clamping column and the inner wall of the cylinder sleeve, and prevent the inner wall of the cylinder sleeve from being scratched during the expansion and clamping process; The guide column is slidably arranged in the guide hole. A mounting seat for connecting with the inner wall of the mounting box is fixedly arranged at one end of the guide column away from the clamping column, and a spring is slidably sleeved on the outer wall of the guide column and located between the square long strip and the mounting seat.

[0013] Furthermore, the position locking assembly comprises: A plurality of limit tooth plates are arranged equidistantly from top to bottom, and are used to lock the positions of the clamping units at corresponding positions to determine the shapes of the plurality of clamping units after being squared; Two connecting rods penetrate through the plurality of limit tooth plates at the same time, and are used to fix the plurality of limit tooth plates to each other; The screw sleeve is fixedly arranged above the uppermost limiting tooth plate through a mounting bracket, and the inner thread of the screw sleeve is connected with a screw, the top end of which rotates through the mounting box and is fixedly provided with a knob.

[0014] Furthermore, the power assembly includes a power supply unit and a power output unit, and the power output unit includes: A micro electric push rod is fixed inside the cylinder through a mounting bracket and is used to provide power for the rising or falling process of the sleeve; A controller, a signal receiver and an electrical lead, wherein the signal receiver and the controller are respectively fixedly arranged on both sides of the top of the micro electric linear actuator, and are respectively used to receive control instructions and control the operation of the micro electric linear actuator according to the control instructions; The circular plate is fixedly arranged on the output end of the micro electric push rod, and a plurality of connecting rods are evenly and fixedly arranged on the outer wall of the circular plate.

[0015] Furthermore, the power supply unit comprises: The bearing plate is fixedly arranged on the inner wall of the cylinder, and two square through slots are provided on both sides of the top of the bearing plate, and a conductive metal plate is fixedly arranged on the inner wall of each square through slot; The lithium battery pack is detachably arranged on the top of the carrier plate and is used to provide power support to the micro electric push rod. Terminals corresponding to the positions of the two conductive metal plates are fixedly arranged on both sides of the bottom of the lithium battery pack.

[0016] Furthermore, a power switch is fixedly arranged between the power connection wire and the micro electric push rod, and the opening or closing of the power switch is controlled by a controller.

[0017] The present invention also discloses a hoisting method for a hoisting device for a crane, which is used for the hoisting device for a crane. The method comprises the following steps: Step 1: Use the power component to pull the expansion and profiling component upward, so that the profiling and expansion component changes from the extended state to the gathered state, and the outer diameter of the circular profile formed by the outer wall of the profiling and expansion component in the gathered state is reduced, and then the lock on the profiling action of the profiling and expansion component is released; Step 2: insert the profile expansion component in the gathered state into the interior of the hoisting mechanism to be hoisted, and use the power component to push down the profile expansion component again, so that the profile expansion component changes from the gathered state to the extended state, completing the profile action of the inner wall shape of the cylinder sleeve, and then locking the shape of the profile expansion component; Step 3: Use the contour expansion assembly that has completed the contour operation in the hoisting work of cylinder liners of the same batch and specification.

[0018] The present invention provides a hoisting device for a crane and a hoisting method thereof. Compared with the prior art, it has the following beneficial effects: 1. A hoisting device for a crane and a hoisting method thereof. By arranging a plurality of clamping units in a profiling inner support unit, the shape of the inner wall of a cylinder liner can be simulated and imitated before hoisting, so that the outer wall shape of the plurality of profiling inner support units can match the shape of the inner wall of the cylinder liner. When the profiling inner support unit contacts the inner wall of the cylinder liner, the clamping units at a plurality of positions can all abut against the inner wall of the cylinder liner, thereby achieving a multi-point expansion and clamping effect, thereby increasing the friction between the profiling inner support unit and the inner wall of the cylinder liner, ensuring that a stable connection can be formed between the hoisting mechanism and the cylinder liner, avoiding accidental separation of the cylinder liner and the hoisting mechanism during the hoisting process, thereby improving the safety of the hoisting process, and at the same time making the force generated during hoisting evenly dispersed to a plurality of clamping points, avoiding the inner wall of the cylinder liner from being damaged due to excessive concentration of clamping force.

[0019] 2. A hoisting device for a crane and a hoisting method thereof, by setting a power component, can use a micro electric telescopic rod to drive multiple contouring inner support units to gather together or separate from each other synchronously, so that there is no need to manually change the positions of the multiple contouring inner support units before simulating the contouring according to the cylinder sleeve, thereby reducing the operating steps of the simulation contouring process, making the simulation contouring operation simpler and faster, and after the contouring inner support units are contoured, it is only necessary to use the micro electric telescopic rod to drive the multiple contouring inner support units to gather together synchronously, and after the contouring inner support units are extended into the cylinder sleeve, the friction between the contouring inner support units and the cylinder sleeve and their own gravity can be used to move away from each other, so that a stable connection can be established between the contouring inner support assembly and the cylinder sleeve; and the lithium battery pack is detachable and can be quickly replaced when the power is low, so that the hoisting process is not affected by power shortage.

[0020] 3. A hoisting device for a crane and a hoisting method thereof, wherein a contoured expansion assembly is provided, wherein the contoured expansion assembly comprises a plurality of contoured inner support units distributed in a circular array. The plurality of contoured inner support units change the outer diameter of the overall contour formed by moving away from each other or gathering together, so that the contoured inner support units can be quickly placed in a cylinder sleeve to be hoisted in a gathered state, and can form an internal clamp on the cylinder sleeve when moving away from each other, so that the cylinder sleeve can be quickly locked before hoisting, thereby improving the hoisting efficiency.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the hoisting process of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 It is a schematic diagram of the structure of the present invention in a decomposed state; Figure 4 It is a structural schematic diagram of the hoisting mechanism of the present invention; Figure 5 It is a schematic cross-sectional view of the lifting mechanism of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A; Figure 7 For the present invention Figure 5 A schematic diagram of the enlarged structure of part B in FIG. Figure 8 It is a schematic diagram of the structure of the lifting mechanism of the present invention in an exploded state; Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure of part C in FIG. Fig.10 For the present invention Figure 8 The D part in the figure is an enlarged structural diagram; Fig.11 This is a schematic diagram of the structure of the power assembly of the present invention in the first decomposed state; Fig.12 This is a schematic diagram of the structure of the power assembly of the present invention in the second decomposed state; Fig.13 This is a schematic structural diagram of the profiled inner support unit of the present invention in a decomposed state; Fig.14 This is a schematic diagram of the internal structure of the installation box of the present invention; Fig.15 For the present invention Fig.14 The enlarged structural diagram of part E in FIG. Fig.16 This is a schematic diagram of the structure of the position locking assembly of the present invention in the first state; Fig.17 For the present invention Fig.16 The enlarged structural diagram of part F in FIG. Fig.18 This is a schematic diagram of the structure of the position locking assembly of the present invention in the second state; Fig.19 For the present invention Fig.18 The G part in the diagram is an enlarged structural diagram; Fig. 20 It is a schematic diagram of the structure of the clamping unit of the present invention in a disassembled state.

[0023] In the figure: 1. hook; 2. cylinder sleeve; 3. lifting mechanism; 31. cylinder barrel; 32. upper lifting rod; 33. lower lifting rod; 34. base; 35. sliding sleeve; 36. support arm; 37. contoured inner support unit; 371. bearing sleeve; 372. mounting box; 373. cover plate; 374. clamping unit; a1. clamping column; a2. positioning teeth; a3. rubber protective sleeve; a4. guide column; a5. mounting seat; a6. spring; 375. limit tooth plate; 376. connecting rod; 377. screw sleeve; 378. screw; 38. micro electric push rod; 39. circular plate; 310. connecting rod; 311. controller; 312. signal receiver; 313. bearing plate; 314. conductive metal plate; 315. lithium battery pack; 316. access port; 317. protective cover; 318. lifting slot. DETAILED DESCRIPTION

[0024] 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.

[0025] The present invention provides two technical solutions: a hoisting device for a crane, specifically including the following embodiments: like Figure 1-Figure 12 The first embodiment is shown: a lifting device for a crane, comprising a hook 1 and a cylinder sleeve 2, wherein a lifting mechanism 3 for lifting the cylinder sleeve 2 by internal expansion is also provided at the bottom of the hook 1, and the lifting mechanism 3 comprises: A suspension rod assembly is detachably arranged at the bottom of the hook 1 to provide support during the lifting process; The profiling expansion assembly is sleeved on the outside of the suspension rod assembly, and simulates the contour shape of the inner wall of the profiling cylinder liner 2 before lifting, so that the outer contour shape after profiling is adapted to the inner wall contour shape of the cylinder liner 2, thereby completing the operation of firmly locking the cylinder liner 2; The power assembly is arranged inside the boom assembly and is used to control the extension or gathering of the contour expansion assembly to assist the contour expansion assembly to smoothly enter the cavity of the cylinder sleeve 2 and complete the expansion locking operation. The boom assembly includes: The upper suspension rod 32 is arranged below the suspension hook 1, and a suspension ring is fixedly arranged on the top thereof, and the suspension ring can be detachably sleeved on the suspension hook 1; The cylinder 31 is detachably arranged at the bottom end of the upper suspension rod 32 through a first flange, and is used to provide space for the installation of the power component. A take-in and put-out port 316 for convenient maintenance is provided on the outer wall of the cylinder 31. A protective cover 317 is detachably arranged inside the take-in and put-out port 316 through bolts, and a plurality of lifting grooves 318 are evenly arranged on the outer wall of the cylinder 31 and below the take-in and put-out port 316.

[0026] The lower suspension rod 33 is detachably arranged at the bottom end of the cylinder 31 through the second flange, and is used to provide a bearing platform for the installation of the contour expansion assembly. The bottom end of the lower suspension rod 33 is also fixedly provided with a base 34 for limiting the position of the contour expansion assembly.

[0027] The contour expansion components include: The sliding sleeve 35 is arranged on the outer wall of the cylinder 31 and is used to transmit the power output by the power component to other components; A plurality of contoured inner support units 37 are evenly arranged below the sliding sleeve 35, each contoured inner support unit 37 is rotatably connected to the sliding sleeve 35 via a support arm 36, and each contoured inner support unit 37 is rotatably connected to the outer wall of the lower suspension rod 33 via a plurality of auxiliary support arms. When the sliding sleeve 35 is not subjected to external force, the auxiliary support arm at the bottom is restricted by the top of the base 34, so that the contoured inner support unit 37 cannot move downward.

[0028] like Figure 13-Figure 20 A second embodiment is shown, which differs from the first embodiment in that: a hoisting device for a crane, the contoured inner support unit 37 comprises: The bearing sleeve 371 is rotatably arranged on the outer wall of the sliding sleeve 35 and the contoured inner support unit 37 through the support arm 36 and the auxiliary support arm respectively; The mounting box 372 is detachably mounted on the outer wall of the bearing sleeve 371. A cover plate 373 is detachably mounted on the outer wall of the bearing sleeve 371 by bolts. A plurality of circular mounting through holes are evenly formed on the outer wall of the cover plate 373. A clamping unit 374 for expanding and clamping the inner wall of the cylinder sleeve 2 is disposed inside each circular mounting through hole. The position locking assembly is disposed inside the mounting box 372 and is used to lock or unlock the positions of the plurality of clamping units 374 at the same time, so as to facilitate contour-matching operations on the plurality of clamping units 374 .

[0029] The clamping unit 374 includes: A clamping column a1 is slidably inserted through the circular mounting hole, and a rectangular strip is fixedly disposed at one end of the clamping column a1 located inside the mounting box 372, a plurality of positioning teeth a2 are evenly fixedly disposed on the top of the rectangular strip, and a guide hole is provided at one end of the rectangular strip away from the clamping column a1; The rubber protective sleeve a3 is fixedly arranged at one end of the clamping column a1 away from the positioning teeth a2, and is used to increase the friction between the inner wall of the cylinder sleeve 2 and prevent the inner wall of the cylinder sleeve 2 from being scratched during the expansion and clamping process; The guide post a4 is slidably arranged in the guide hole, and a mounting seat a5 for connecting with the inner wall of the mounting box 372 is fixedly arranged at one end of the guide post a4 away from the clamping post a1, and a spring a6 is slidably sleeved on the outer wall of the guide post a4 and located between the rectangular long strip block and the mounting seat a5. The guide hole is divided into two sections, the inner diameter of the section away from the mounting seat a5 is larger than the outer diameter of the guide post a4, and the other section is adapted to the outer diameter of the guide post a4, and an anti-dropping block adapted to the larger inner diameter of the guide hole is fixedly arranged at one end of the guide post a4 to prevent the guide post a4 from slipping out of the guide hole; a long strip-shaped limiting block is also fixedly arranged on the outer wall of the clamping post a1, and a limiting groove adapted to the long strip-shaped limiting block is opened on the inner wall of the circular mounting hole on the surface of the cover plate 373, and the long strip-shaped limiting block is slidably arranged in the limiting groove to prevent the clamping post a1 from rotating during the movement.

[0030] The position locking assembly includes: A plurality of limit tooth plates 375 are arranged equidistantly from top to bottom, and are used to lock the positions of the clamping units 374 at corresponding positions, so as to determine the shapes of the plurality of clamping units 374 after being squared; Two connecting rods 376 penetrate through the plurality of limiting tooth plates 375 at the same time, and are used to fix the plurality of limiting tooth plates 375 to each other; The screw sleeve 377 is fixedly arranged above the uppermost limit tooth plate 375 through a mounting bracket, and a screw 378 is connected to the inner thread of the screw sleeve 377. The top of the screw 378 rotates through the mounting box 372 and is fixedly provided with a knob. Limiting grooves are provided on both sides of the inner wall of the mounting box 372, and the two ends of the plurality of limit tooth plates 375 are respectively slidably arranged in the two limit grooves.

[0031] The power assembly includes a power supply unit and a power output unit, and the power output unit includes: The micro electric push rod 38 is fixedly arranged inside the cylinder 31 through a mounting bracket, and is used to provide power for the ascending or descending process of the sliding sleeve 35; A controller 311, a signal receiver 312 and an electrical conductor, wherein the signal receiver 312 and the controller 311 are respectively fixedly arranged on both sides of the top of the micro electric linear actuator 38, and are respectively used to receive control instructions and control the operation of the micro electric linear actuator 38 according to the control instructions; The circular plate 39 is fixedly arranged on the output end of the micro electric push rod 38, and a plurality of connecting rods 310 are evenly and fixedly arranged on the outer wall of the circular plate 39. The plurality of connecting rods 310 are respectively slidably arranged in the lifting grooves 318 at corresponding positions, and each connecting rod 310 is fixedly connected to the sliding sleeve 35; The power supply unit includes: The bearing plate 313 is fixedly arranged on the inner wall of the cylinder 31. Two square through slots are provided on both sides of the top of the bearing plate 313. A conductive metal plate 314 is fixedly arranged on the inner wall of each square through slot. The lithium battery pack 315 is detachably mounted on the top of the carrier plate 313 and is used to provide power support to the micro electric push rod 38. The two sides of the bottom of the lithium battery pack 315 are fixedly provided with terminals corresponding to the positions of the two conductive metal plates 314. The lithium battery pack 315 can be installed inside the cylinder 31 through the terminals, and the two terminals can be slidably arranged in two square through grooves correspondingly, and the bottom ends can contact the tops of the conductive metal plates 314; after the lithium battery pack 315 is installed in the preset position, its outer wall can be limited by the inner wall of the cylinder 31 and the protective cover 317 without position displacement; the lithium battery pack 315 is a rechargeable battery, and is provided with multiple batteries, which can sound an alarm when the battery is low, prompting to replace other batteries with sufficient power and charge the replaced lithium battery pack 315; there are two power connection wires, which are fixedly connected to the conductive metal plates 314 at the corresponding positions respectively; A power switch is also fixedly arranged between the power connection wire and the micro electric push rod 38 , and the opening or closing of the power switch is controlled by the controller 311 .

[0032] The embodiment of the present invention further provides a method for hoisting a hoisting device for a crane, which is used for the hoisting device for a crane, and the method comprises the following steps: Step 1, using the power component to pull the expansion and shaping component upward, the shaping and expanding component changes from the extended state to the gathered state, the outer diameter of the circular contour formed by the outer wall of the shaping and expanding component in the gathered state is reduced, and then the lock on the shaping action of the shaping and expanding component is released; the specific process is: the ring sleeve at the top of the upper suspension rod 32 is set on the hook 1, and then the knob fixed on the top of the screw rod 378 is rotated counterclockwise for one circle. Since the screw rod 378 and the screw rod sleeve 377 are threadedly connected, when the screw rod 378 rotates counterclockwise for one circle, the screw rod sleeve 377 moves upward along the outer wall of the screw rod 378 by a preset distance, so that the limiting tooth plates 375 at multiple positions and the positioning teeth a2 in the clamping unit 374 at the corresponding position are separated. Therefore, the clamping unit 374 is changed from a locked position state to a state where it can slide freely relative to the cover plate 373; Next, an instruction to lift the circular plate 39 upward is sent to the micro electric push rod 38 through an external mobile terminal device. After receiving the instruction, the signal receiver 312 immediately transmits the instruction to the controller 311. The controller 311 controls the micro electric push rod 38 to lift the circular plate 39 to a preset height according to the instruction. At this time, the circular plate 39 simultaneously pulls the multiple connecting rods 310 upward to slide upward along the lifting groove 318, and the sliding sleeve 35 synchronously slides upward along the outer wall of the cylinder 31. At the same time, the multiple support arms 36 and the auxiliary support arms rotate simultaneously relative to the lower suspension rod 33 and the contoured inner support unit 37. The contoured inner support units 37 at multiple positions gradually approach the position of the lower suspension rod 33, that is, the outer diameter of the external circular contour jointly formed by the multiple contoured inner support units 37 is reduced, so as to facilitate the subsequent smooth insertion into the cylinder sleeve 2 to be hoisted. Step 2: insert the profile-bearing expansion component in the gathered state into the interior of the hoisting mechanism 3 to be hoisted, and use the power component to push down the profile-bearing expansion component again, so that the profile-bearing expansion component changes from the gathered state to the extended state, completing the profiling action of the inner wall shape of the cylinder sleeve 2, and then locking the shape of the profile-bearing expansion component; the specific process is: the hook 1 drives the hoisting mechanism 3 to move to the top of the cylinder sleeve 2 to be hoisted, and then gradually releases the hoisting mechanism 3 downward until multiple profile-bearing inner support units 37 extend into the cylinder sleeve 2, and at this time, the knob at the top of the screw rod 378 is still located outside the cylinder sleeve 2; Next, the mobile terminal device is used to send an extension command to the micro electric push rod 38 again, that is, the signal receiver 312 transmits the command to the controller 311 immediately after receiving the command, and the controller 311 controls the circular plate 39 to move down to a preset height according to the command. At this time, the sliding sleeve 35 moves down along the outer wall of the cylinder barrel 31 under the downward push of the circular plate 39. At the same time, the contoured inner support units 37 at multiple positions gradually move to a position away from the lower suspension rod 33 under the action of the support arms 36 and the auxiliary support arms at the corresponding positions. The clamping units 374 in the multiple contoured inner support units 37 gradually contact the inner wall of the cylinder sleeve 2. When the rubber protective sleeve a3 and the inner wall of the cylinder sleeve 2 are against each other and continue to move toward the inner wall of the cylinder sleeve 2, the reaction force of the inner wall of the cylinder sleeve 2 relative to the positioning teeth a2 pushes the clamping column a1 to move toward the inside of the installation box 372, and the guide column a4 slides along the guide hole in the contoured long strip, and the spring a6 is compressed at this time; Next, after the output end of the micro electric push rod 38 moves down to a preset height, the knob fixed on the top of the screw rod 378 is rotated clockwise for one circle one by one. When the screw rod 378 rotates clockwise for one circle, that is, when the limit tooth plate 375 is resisted by the clamping unit 374 and the knob cannot continue to rotate, the screw rod sleeve 377 moves downward along the outer wall of the screw rod 378 by a preset distance, so that the limit tooth plates 375 at multiple positions and the positioning teeth a2 in the clamping unit 374 at the corresponding positions are meshed with each other. Therefore, the position of the clamping unit 374 is changed from a free sliding state to a locked state. At this point, the simulated profiling process of the profiling inner support unit 37 is completed. Next, the positions of the multiple contoured inner support units 37 are moved closer to each other by means of the power of the micro electric push rod 38, and then the lifting mechanism 3 is taken out of the cylinder sleeve 2 by using the lifting hook 1; It should be noted that the specifications of the hoisted cylinder liner 2 are known sizes, and all cylinder liners 2 to be hoisted should be within the hoisting size range of the hoisting mechanism 3 of the present invention.

[0033] Step 3, the profiling expansion assembly that has completed the profiling operation is applied to the hoisting work of the cylinder sleeves 2 of the same batch and specification; the specific process is: when the cylinder sleeves 2 of the same batch and model as in step 2 are subsequently hoisted, the positions of the multiple profiling inner support units 37 are controlled by the mobile terminal device to move closer to each other, and the control of the micro electric push rod 38 is immediately released after the hoisting mechanism 3 is lifted and inserted into the cylinder sleeve 2, that is, the output end of the micro electric push rod 38 is in a free telescopic state, so that the multiple profiling inner support units 37 are under their own gravity. The ends of the clamping units 374 contact the inner wall of the cylinder liner 2. At this time, when the hook 1 pulls the lifting mechanism 3 upward, the outer walls of the multiple clamping units 374 are acted upon by the friction force of the inner wall of the cylinder liner 2 and pull the sliding sleeve 35 to continue to move downward a certain distance along the outer wall of the cylinder liner 31, so that the multiple contoured inner support units 37 continue to move away from each other, and a greater extrusion pressure is generated between the inner wall of the cylinder liner 2, thereby increasing the friction force and allowing the lifting mechanism 3 to perform a stable lifting operation.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting device for a crane, comprising a lifting hook and a cylinder sleeve, wherein the bottom of the lifting hook is also provided with a lifting mechanism for lifting the cylinder sleeve by internal expansion, characterized in that: The hoisting mechanism comprises: A suspension rod assembly is detachably arranged at the bottom of the hook to provide support during the lifting process; The profiling expansion assembly is sleeved on the outside of the boom assembly, and simulates the contour shape of the inner wall of the profiling cylinder liner before lifting, so that the outer contour shape after profiling is adapted to the inner wall contour shape of the cylinder liner, thereby completing the operation of firmly locking the cylinder liner; The power assembly is arranged inside the boom assembly and is used to control the extension or gathering action of the contour-bearing expansion assembly to assist the contour-bearing expansion assembly to smoothly enter the cavity of the cylinder sleeve and complete the expansion locking operation.

2. A hoisting device for a crane according to claim 1, characterized in that: The boom assembly comprises: An upper suspension rod is arranged below the suspension hook, and a suspension ring is fixedly arranged on the top of the upper suspension rod, and the suspension ring can be detachably sleeved on the suspension hook; The cylinder barrel is detachably arranged at the bottom end of the upper suspension rod through a first flange, and is used to provide space for the installation of the power assembly. A take-out opening for convenient maintenance is provided on the outer wall of the cylinder barrel, and a protective cover is detachably provided inside the take-out opening through bolts, and a plurality of lifting through grooves are evenly provided on the outer wall of the cylinder barrel and below the take-out opening; The lower suspension rod is detachably arranged at the bottom end of the cylinder barrel through the second flange, and is used to provide a bearing platform for the installation of the contour expansion assembly. The bottom end of the lower suspension rod is also fixedly provided with a base for limiting the position of the contour expansion assembly.

3. A hoisting device for a crane according to claim 2, characterized in that: The contoured expansion assembly comprises: The sliding sleeve is arranged on the outer wall of the cylinder and is used to transmit the power output by the power component to other components; A plurality of contoured inner support units are evenly arranged below the sliding sleeve, each contoured inner support unit is rotationally connected to the sliding sleeve via a support arm, and each contoured inner support unit is rotationally connected to the outer wall of the lower suspension rod via a plurality of auxiliary support arms.

4. A hoisting device for a crane according to claim 3, characterized in that: The contoured inner support unit comprises: The bearing sleeve is rotatably arranged on the outer wall of the sliding sleeve and the contoured inner support unit through the support arm and the auxiliary support arm respectively; The mounting box is detachably mounted on the outer wall of the bearing sleeve, a cover plate is detachably mounted on the outer wall of the bearing sleeve by bolts, and a plurality of circular mounting through holes are evenly opened on the outer wall of the cover plate, and a clamping unit for expanding and clamping the inner wall of the cylinder sleeve is arranged inside each of the circular mounting through holes; The position locking assembly is arranged inside the installation box and is used to lock or unlock the positions of multiple clamping units at the same time to facilitate the contouring operation of the multiple clamping units.

5. A hoisting device for a crane according to claim 4, characterized in that: The clamping unit comprises: A clamping column, which slides through the circular mounting hole, and a rectangular strip is fixedly arranged at one end of the clamping column located inside the mounting box, a plurality of positioning teeth are evenly fixedly arranged on the top of the rectangular strip, and a guide hole is opened at one end of the rectangular strip away from the clamping column; A rubber protective sleeve is fixedly arranged at one end of the clamping column away from the positioning teeth, and is used to increase the friction between the clamping column and the inner wall of the cylinder sleeve, and prevent the inner wall of the cylinder sleeve from being scratched during the expansion and clamping process; The guide column is slidably arranged in the guide hole. A mounting seat for connecting with the inner wall of the mounting box is fixedly arranged at one end of the guide column away from the clamping column, and a spring is slidably sleeved on the outer wall of the guide column and located between the square long strip and the mounting seat.

6. A hoisting device for a crane according to claim 4, characterized in that: The position locking assembly comprises: A plurality of limit tooth plates are arranged equidistantly from top to bottom, and are used to lock the positions of the clamping units at corresponding positions to determine the shapes of the plurality of clamping units after being squared; Two connecting rods penetrate through the plurality of limit tooth plates at the same time, and are used to fix the plurality of limit tooth plates to each other; The screw sleeve is fixedly arranged above the uppermost limiting tooth plate through a mounting bracket, and the inner thread of the screw sleeve is connected with a screw, the top end of which rotates through the mounting box and is fixedly provided with a knob.

7. A hoisting device for a crane according to claim 3, characterized in that: The power assembly includes a power supply unit and a power output unit, and the power output unit includes: A micro electric push rod is fixed inside the cylinder through a mounting bracket and is used to provide power for the rising or falling process of the sleeve; A controller, a signal receiver and an electrical lead, wherein the signal receiver and the controller are respectively fixedly arranged on both sides of the top of the micro electric linear actuator, and are respectively used to receive control instructions and control the operation of the micro electric linear actuator according to the control instructions; The circular plate is fixedly arranged on the output end of the micro electric push rod, and a plurality of connecting rods are evenly and fixedly arranged on the outer wall of the circular plate.

8. A hoisting device for a crane according to claim 7, characterized in that: The power supply unit comprises: The bearing plate is fixedly arranged on the inner wall of the cylinder, and two square through slots are provided on both sides of the top of the bearing plate, and a conductive metal plate is fixedly arranged on the inner wall of each square through slot; The lithium battery pack is detachably arranged on the top of the carrier plate and is used to provide power support to the micro electric push rod. Terminals corresponding to the positions of the two conductive metal plates are fixedly arranged on both sides of the bottom of the lithium battery pack.

9. A hoisting device for a crane according to claim 7, characterized in that: A power switch is also fixedly arranged between the power connection wire and the micro electric push rod, and the opening or closing of the power switch is controlled by a controller.

10. A method for hoisting a hoisting device for a crane, characterized in that: For a hoisting device for a crane as claimed in any one of claims 1 to 9, the method comprises the following steps: Step 1: Use the power component to pull the expansion and profiling component upward, so that the profiling and expansion component changes from the extended state to the gathered state, and the outer diameter of the circular profile formed by the outer wall of the profiling and expansion component in the gathered state is reduced, and then the lock on the profiling action of the profiling and expansion component is released; Step 2: insert the profile expansion component in the gathered state into the interior of the hoisting mechanism to be hoisted, and use the power component to push down the profile expansion component again, so that the profile expansion component changes from the gathered state to the extended state, completing the profile action of the inner wall shape of the cylinder sleeve, and then locking the shape of the profile expansion component; Step 3: Use the contour expansion assembly that has completed the contour operation in the hoisting work of cylinder liners of the same batch and specification.

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