Lifting appliance for lifting large cable reel

Abstract

The invention relates to a lifting appliance for lifting a large cable reel, and belongs to the technical field of cable reel lifting appliances. The lifting device comprises a lifting frame and a lifting arm mechanism installed on the lifting frame, the lifting arm mechanism comprises two lifting arm combinations which are symmetrically arranged front and back, and each lifting arm combination comprises two lifting arm assemblies which are symmetrically arranged left and right; the lifting arm assembly comprises a lifting arm and a supporting leg connected to the bottom end of the lifting arm, the supporting leg is located on the side, facing the lifting arm combination center, of the lifting arm, a first inclined supporting piece and an extrusion piece are arranged on the supporting leg, and the first inclined supporting piece is elastically installed on the supporting leg in a sliding mode in the direction inclining towards the lifting arm combination center from bottom to top; the first inclined supporting piece is used for being elastically pressed on the circumferential side wall of the circular side plate in the cable reel so as to support the cable reel along with the mutual approaching of the two sets of suspension arm assemblies which are symmetrical left and right. The cable reel can be supported more firmly, shaking between the cable reel and the lifting appliance in the cable reel transferring process is avoided, and the safety coefficient is higher.

Description

Technical Field

[0001] The invention relates to the technical field of cable drum hoists, in particular to a hoist for hoisting a large cable drum. Background Art

[0002] Cable reels are devices used to store, transport and lay wires and cables. They are usually made of wood, metal or plastic, and include a cylinder in the middle and two circular side plates connected to both ends of the cylinder in the axial direction of the cylinder. During the construction process, it is often necessary to transport the cable reels. In order to transport the cable reels more safely and efficiently and protect the cables from damage during transportation, cable reel hoists are usually used to transport the cable reels. Cable reel hoists play an important role in power engineering, construction sites, manufacturing and other occasions where large cable reels need to be moved. Choosing the right cable reel hoist can not only improve work efficiency, but also ensure the safety of operators.

[0003] The principle of the cable reel hoist in the prior art is usually to use a suspension arm to hook up the cable reel and then transport the cable reel. For example, the patent with authorization announcement number CN204778367U discloses a cable reel lifting sling, which includes a suspension beam, a suspension arm and a suspension arm locking mechanism. The upper end of the suspension beam is suspended on the hook of the crane, and the suspension arm is hingedly assembled on the left and right sides of the suspension beam through a pin shaft. The suspension arm includes a left suspension arm and a right suspension arm, and a hook head with a symmetrical structure is provided at the lower end of the left suspension arm and the right suspension arm. The suspension arm locking mechanism is equipped with the left suspension arm and the right suspension arm to limit the relative position of the left suspension arm and the right suspension arm.

[0004] When the hanger is in use, the cable reel is hooked by the hook heads of the left and right arms, and then the hanger is pulled up by a crane to transport the cable reel. However, the cable reel is only suspended on the hanger, and the axial position and circumferential position of the cable reel are not fixed. During the transportation of the cable reel, the cable reel will shake. Frequent shaking will cause wear of the hanger and the cable reel, affect the stress conditions of the cable reel and the suspension structure, and shorten its service life. For wooden cable reels assembled with screws, long-term and violent shaking can easily cause the screws to loosen, causing a series of safety hazards. Summary of the invention

[0005] The present invention provides a lifting device for lifting a large cable drum, so as to solve the technical problems that the cable drum lifting device in the prior art cannot fix the cable drum, the cable drum will shake during transportation, the service life of the lifting device is short, and the safety factor is low.

[0006] In order to solve the above problems, the present invention provides a lifting device for lifting a large cable drum, which adopts the following technical solutions: A hoisting device for hoisting a large cable drum, comprising a hanger and an arm mechanism installed on the hanger, the arm mechanism comprising two sets of arm assemblies arranged symmetrically in front and back and capable of approaching or moving away from each other in the front and back direction, and the arm assembly comprising two sets of arm components arranged symmetrically in left and right and capable of approaching or moving away from each other in the left and right direction; The boom assembly includes a boom and a support foot connected to the bottom end of the boom, the support foot is located on the side of the boom facing the center of the boom assembly, and a diagonal support member 1 and an extrusion member are provided on the support foot, and the diagonal support member 1 is elastically slidably mounted on the support foot along a direction inclined from bottom to top toward the center of the boom assembly; The diagonal support member 1 is used to elastically press against the circumferential side wall of the circular side plate in the cable drum to support the cable drum as the two groups of left-right symmetrical boom assemblies approach each other; The extrusion piece is used to stop the circular side plate in the cable drum front and back after the diagonal support piece lifts the cable drum. The two sets of suspension arm combinations are used to move away from each other after the diagonal support piece lifts the cable drum, so as to drive the front and rear opposite extrusion pieces to move away from each other, so that the front and rear opposite extrusion pieces are pressed against the circular side plate from the inside to the outside to tighten the cable drum.

[0007] By adopting the above technical solution, when hoisting the cable drum, the left and right symmetrical diagonal bracing members approach each other to support the cable drum, and the front and rear opposite extrusion members move away from each other to tighten the cable drum. The extrusion member tightens the cable drum so that the cable drum and the boom mechanism are relatively fixed together. The diagonal bracing member supports the cable drum from bottom to top to prevent the cable drum from slipping under the action of its own weight, so that the cable drum and the sling are firmly bound together. In the process of transporting the cable drum, the cable drum will not shake and cause mutual friction or collision with the sling. The stress state of the sling is more stable, which can effectively extend the service life of the sling. In the process of transporting the cable drum, the cable drum will not fall off the sling, and the safety factor is higher.

[0008] Furthermore, the boom can be extended and retracted up and down, and the support leg includes a main body section and a movable section. The main body section is fixedly connected to the bottom end of the boom, and the movable section can be movably installed in the left and right directions on the end of the main body section facing away from the boom. Diagonal support member 1 is installed on the main body section, and diagonal support member 2 is installed on the movable section. Diagonal support member 2 is located below diagonal support member 1, and diagonal support member 2 is used to be pressed against the circumferential outer wall of the circular side plate of the cable drum as the two groups of boom assemblies that are symmetrical on the left and right approach each other.

[0009] By adopting the above technical solution, the boom can be extended and retracted up and down, and combined with the above boom components being able to move away from each other, the sling can be suitable for transporting cable reels of various outer diameters. The support leg includes a main section and a movable section, and a second diagonal support member is provided on the movable section. The second diagonal support member and the first diagonal support member support the cable reel at the same time to avoid stress concentration on one diagonal support member, so that the force on the cable reel is more uniform. The movable section can slide in the left and right directions. When supporting a cable reel with a larger diameter, the movable section can extend away from the main section to a position closer to the center of the cable reel, thereby providing more stable support for the cable reel.

[0010] Furthermore, the boom adopts a vertically extending lifting cylinder, the lifting output end of the lifting cylinder faces downward, and the main body section is connected to the lifting output end of the lifting cylinder.

[0011] Furthermore, the lifting cylinder is in transmission connection with the movable section, and the movable section can be driven to move back to the main section when the lifting output end of the lifting cylinder extends downward.

[0012] By adopting the above technical solution, the movable section is driven to move back to the main section while the lifting cylinder is extended. For cable reels with larger outer diameters, the position of the movable section is driven to be adjusted synchronously while adjusting the length of the boom, and the adjustment efficiency is higher. Part of the power of the lifting cylinder is allocated to the movable section to adjust the position of the movable section, and there is no need to separately set up a power element for adjusting the position of the movable section.

[0013] Furthermore, a hydraulic cylinder 1 is fixedly installed on the cylinder body of the lifting cylinder, a piston rod 1 is vertically inserted into the hydraulic cylinder 1, the piston rod 1 is connected to the main body section, a hydraulic cylinder 2 is fixedly installed on the main body section, a piston rod 2 is inserted into the hydraulic cylinder 2 along the left and right directions, the piston rod 2 is connected to the movable section, the hydraulic cylinder 1 is connected to the inner cavity of the hydraulic cylinder 2, and the driving output end of the lifting cylinder moves downward, driving the piston rod 1 to move downward, thereby squeezing the hydraulic oil in the hydraulic cylinder 1 into the hydraulic cylinder 2, so as to drive the piston rod 2 to drive the movable section to move back to the main body section.

[0014] By adopting the above technical solution, the transmission connection between the lifting cylinder and the movable section is realized through the connected hydraulic cylinder 1 and hydraulic cylinder 2, which has a simple structure and is easy to realize.

[0015] Furthermore, a hydraulic cylinder three is installed on the main section, and a piston rod three is elastically penetrated in the hydraulic cylinder three and inclined from bottom to top toward the center of the boom assembly, and a diagonal support piece one is connected to the top end of the piston rod three; a sealed chamber is provided on the movable section, and a piston rod four is vertically penetrated in the sealed chamber, and a diagonal support piece two is connected to the top end of the piston rod four. The inner cavity of the hydraulic cylinder three is connected to the sealed chamber, and the diagonal support piece one protrudes from the diagonal support piece two toward the center of the boom assembly when it does not contact the cable drum. In the process of the left and right symmetrical boom assemblies approaching each other, the diagonal support piece one is squeezed by the cable drum and drives the piston rod three to move downward, so as to squeeze the hydraulic oil in the hydraulic cylinder three into the sealed chamber, thereby driving the piston rod four to move upward so that the diagonal support piece two is supported on the circular side plate of the cable drum.

[0016] By adopting the above technical solution, when the diagonal support member 1 is squeezed by the cable reel, it drives the diagonal support member 2 to move upward and support the cable reel. For cable reels of different specifications, it can be ensured that the diagonal support member 2 can support the cable reel. The movement of the diagonal support member 1 drives the diagonal support member 2 to move to support the cable reel, so that the diagonal support member 1 and the diagonal support member 2 can adaptively support the cable reel, and the structure is ingenious.

[0017] Furthermore, the extrusion piece includes a coplanar fixed plate and a movable plate, the fixed plate is fixedly connected to the main body section, and the movable plate is fixedly connected to the movable section.

[0018] Furthermore, a telescopic support rod extending forward and backward is connected between each front and rear opposing groups of extruded parts. The telescopic support rod includes a pipe section and a rod section movably inserted in the pipe section. A hydraulic oil supply assembly and a locking structure are connected to the movable section. The hydraulic oil supply assembly is used to inject hydraulic oil into the pipe section as the rod section and the pipe section move away from each other. The locking structure is used to lock the hydraulic oil in the inner cavity of the pipe section when the rod section and the pipe section are relatively stationary.

[0019] By adopting the above technical solution, the telescopic support rod can strengthen the connection between the front and rear relative boom assemblies, so that the structural strength of the entire sling becomes higher. The locking structure locks the hydraulic oil in the pipe section after the telescopic support rod is extended, so that the telescopic support rod can be maintained at this length state. When the cable drum or the sling is hit by other objects during the transportation of the cable drum, the length of the telescopic support rod will not change. The sling is stronger and the sling can be prevented from being deformed by collision.

[0020] Furthermore, the telescopic support rod is connected between two movable plates that are opposite to each other at the front and rear.

[0021] Furthermore, the hydraulic oil supply assembly includes a hydraulic cylinder four, the inner cavity of which is connected to the inner cavity of the pipe section, and the hydraulic oil in the hydraulic cylinder four is sucked into the inner cavity of the pipe section during the process of the rod section and the pipe section moving away from each other; the locking structure includes a trigger block elastically slidably mounted on the movable plate for front and rear sliding, and a plug connected to the trigger block, the trigger block is located at one end of the telescopic support rod of the movable plate facing away from the movable plate, the plug passes through the movable plate in the front and rear direction and is inserted into the inner cavity of the pipe section, and the trigger block is used to be squeezed by the circular side plate of the cable drum and move toward the pipe section during the process of tightening the cable drum, so as to drive the plug to move in the pipe section to seal the connecting area between the pipe section and the hydraulic cylinder four.

[0022] By adopting the above technical solution, the movable plate is pressed on the cable drum to tighten the cable drum, and the trigger block is squeezed to drive the plug to seal the area on the pipe section connected to the hydraulic cylinder four, preventing the hydraulic oil from flowing between the inner cavity of the pipe section and the hydraulic cylinder four. The telescopic support rod is locked while the cable drum is tightened, with sensitive response and ingenious structure.

[0023] The beneficial effects of a sling for lifting large cables provided by the present invention are: it can provide more stable support for the cable reel, avoid shaking between the cable reel and the sling during the transportation of the cable reel, avoid friction and collision between the cable reel and the sling, the service life of the cable reel and the sling is longer, the process safety factor of conveying the cable reel is higher, and it can be applied to cable reels of different sizes, with a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A front view of a hoisting device for hoisting a large cable drum provided by the present invention; Figure 2 A left side view of a lifting device for lifting a large cable drum provided by the present invention; Figure 3 A top view of a hoisting device for hoisting a large cable drum provided by the present invention; Figure 4 A schematic diagram of the three-dimensional structure of a hoisting device for hoisting a large cable drum provided by the present invention; Figure 5 for Figure 4 A schematic diagram of the structure enlargement at the center A; Figure 6 A three-dimensional cross-sectional view of a hoisting device for hoisting a large cable drum provided by the present invention; Figure 7 for Figure 6 A schematic diagram of the structure enlarged at B in the middle; Figure 8 A cross-sectional view of a telescopic support rod in a hoisting device for hoisting a large cable drum provided by the present invention; Fig. 9 A cross-sectional view of a hydraulic cylinder in a lifting device for lifting a large cable drum provided by the present invention; Fig.10 A cross-sectional view of a crossbeam in a hoisting device for hoisting a large cable drum provided by the present invention; Fig.11 A front view of a cable drum hoisted by a hoisting device for hoisting a large cable drum provided by the present invention; Fig.12 The present invention provides a left side view of a cable reel hoisted by a hoisting device for hoisting a large cable reel provided by the present invention.

[0025] Description of reference numerals: 1. Baffle; 2. Crossbeam; 201. Ridge; 3. Lifting ring; 4. Driving motor 1; 5. Longitudinal guide rail; 6. Driving motor 2; 7. Vertical mounting plate; 8. Sliding block 1; 9. Connecting rod; 10. Sliding block 2; 11. Cylinder body; 12. Lifting output end; 13. Main section; 131. Slope; 14. Movable section; 15. Hydraulic cylinder 3; 16. Piston rod 3; 17. Elastic part 2; 18. Diagonal brace 1; 19. Piston rod 4; 20. Transmission screw 2; 21. Cable drum; 211. Round side plate; 212. Cylinder; 22, pipe section; 221, connecting hole; 23, rod section; 24, fixed plate; 241, vertical plate section; 242, horizontal plate section; 25, movable plate; 26, hydraulic cylinder one; 27, trigger rod; 28, hydraulic cylinder two; 29, hydraulic cylinder four; 30, connecting pipe; 31, trigger block; 32, plug; 33, elastic part three; 34, elastic part one; 35, piston rod one; 36, horizontal mounting plate; 37, diagonal support part two; 38, transmission screw one; 39, driving slider; 40, limit block; 41, pressure plate two. DETAILED DESCRIPTION

[0026] 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. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0027] The following is one embodiment of a lifting device for lifting a large cable drum provided by the present invention: like Figure 1-Figure 12 As shown, a lifting device for lifting a large cable drum includes a hanger, a lifting arm mechanism, a telescopic support rod, a hydraulic oil supply assembly, a locking structure and a driving mechanism. The lifting device for lifting a large cable drum is used to lift Fig.11 , Fig.12 The cable drum 21 shown includes a cylinder 212 and circular side plates 211 connected to both ends of the cylinder 212 .

[0028] like Figure 1-Figure 4 As shown, the hanging bracket includes a main bracket and two longitudinal guide rails 5.

[0029] The main bracket includes a cross beam 2 extending left and right and two baffle plates 1 respectively connected to the left and right ends of the cross beam 2. As Fig.10 shown, the cross section of the cross beam 2 is in a shape of a capital "Ji", with upwardly protruding ridges 201 provided at the front and rear ends of the cross beam 2. Three hanging rings 3 for connecting with the suspension mechanism are connected to the top of the cross beam 2 and are distributed at intervals left and right. As Figure 6 shown, a horizontal mounting plate 36 is also connected to the middle position at the bottom of the cross beam 2, and a vertical mounting plate 7 is vertically connected to the bottom of the horizontal mounting plate 36.

[0030] As Figure 2-Figure 4 shown, both of the two longitudinal guide rails 5 extend in the front-rear direction. Two first sliders 8 arranged symmetrically front and rear are connected to the top of the longitudinal guide rail 5. The first sliders 8 are provided with U-shaped notches opening downward. The two first sliders 8 are respectively buckled on the two ridges 201 on the cross beam 2 through the U-shaped notches, so that the two longitudinal guide rails 5 are connected to the cross beam 2 in a left-right guiding and sliding manner. As Figure 6 shown, a driving slider 39 is also connected to the top of the longitudinal guide rail 5. The driving slider 39 is located between the two first sliders 8 and is inserted into the inner cavity of the cross beam 2 from bottom to top.

[0031] As Figure 1-Figure 4 shown, the boom mechanism includes two sets of boom combinations arranged symmetrically front and rear. Each boom combination includes two sets of boom assemblies arranged symmetrically left and right and slidingly mounted on the two longitudinal guide rails 5 front and rear respectively.

[0032] Each boom assembly includes a boom, a support leg, a first hydraulic cylinder 26, a second hydraulic cylinder 28, a third hydraulic cylinder 15, a first diagonal brace 18, a second diagonal brace 37 and a pressing member.

[0033] As Figure 1 , Figure 2 , Figure 4 shown, the boom is a vertically extending lifting cylinder. The lifting output end 12 of the lifting cylinder is arranged downward. A second slider 10 is connected to the top of the cylinder body 11 of the lifting cylinder. The second slider 10 is slidably mounted on the corresponding longitudinal guide rail 5 front and rear.

[0034] As Figure 4 shown, a connecting rod 9 extending left and right is passed through each pair of symmetrically left and right second sliders 10. The connecting rod 9 is longer than the above-mentioned cross beam 2.

[0035] As Figure 4 , Figure 5As shown, the support leg includes a main section 13 and a movable section 14. The main section 13 is connected to the lifting output end 12 of the lifting cylinder and is located on the side of the lifting cylinder facing the central area of ​​the boom assembly. The main section 13 is provided with a T-shaped slide groove running through the left and right, and the main section 13 is also provided with a slope 131 inclined from top to bottom toward the center of the boom assembly.

[0036] The movable section 14 is located on the side of the main section 13 facing away from the lifting cylinder. The end of the movable section 14 facing the lifting cylinder is connected to a T-shaped slide rail extending left and right. The T-shaped slide rail is inserted in the T-shaped slide groove so that the movable section 14 is connected to the main section 13 so as to slide left and right. A cylindrical sealed chamber with an axis extending up and down is provided inside the movable section 14. The sealed chamber is not shown in the figure. A vertically extending piston rod 19 is passed through the sealed chamber.

[0037] like Figure 6 , Fig. 9 As shown, the hydraulic cylinder 26 is fixedly mounted on the side wall of the cylinder body 11 of the lifting cylinder, a vertically extending piston rod 35 is passed through the hydraulic cylinder 26, the top end of the piston rod 35 is located above the hydraulic cylinder 26 and is vertically connected to a pressure plate 1, an elastic member 34 is sleeved on the outer side of the piston rod 35, the elastic member 34 is a compression spring that can elastically extend and retract up and down, and the elastic member 34 is located between the pressure plate 1 and the hydraulic cylinder 26.

[0038] A trigger rod 27 extending up and down is coaxially penetrated inside the piston rod 35, and the trigger rod 27 and the piston rod 35 can slide up and down relative to each other, and the top of the trigger rod 27 is vertically connected to the limit block 40, and the bottom of the trigger rod 27 extends to the bottom of the hydraulic cylinder 26 and is fixedly connected to the main body section 13. When the lifting output end 12 of the lifting cylinder moves downward, it can drive the trigger rod 27 to move downward, and drive the piston rod 35 to move downward through the limit block 40 at the top of the trigger rod 27.

[0039] like Figure 6 , Figure 7 As shown, the hydraulic cylinder 28 is fixedly mounted on the main body section 13, and a piston rod 2 extending left and right is slidably penetrated in the hydraulic cylinder 28 in the left and right directions, and the movable section 14 is connected to the end of the piston rod 2. The inner cavity of the hydraulic cylinder 28 is connected to the inner cavity of the hydraulic cylinder 1 26 through a hose, and when the lifting output end 12 of the lifting cylinder moves downward, the trigger rod 27 is driven to move downward, thereby driving the piston rod 1 35 to move downward, so as to squeeze the hydraulic oil in the hydraulic cylinder 1 26 into the inner cavity of the hydraulic cylinder 28, thereby pushing the piston rod 2 to extend outward, and driving the movable section 14 to move away from the main body section 13.

[0040] like Figure 4 , Figure 5As shown, the hydraulic cylinder three 15 is connected to the main section 13 perpendicularly to the above-mentioned slope 131, and a piston rod three 16 is slidably inserted into the hydraulic cylinder three 15 and extends in a direction inclined from bottom to top toward the center of the boom assembly. The top end of the piston rod three 16 extends to the top of the hydraulic cylinder three 15 and is vertically connected to the pressure plate two 41. The outer side of the piston rod three 16 is sleeved with an elastic member two 17, and the elastic member two 17 is a compression spring that can be retracted and retracted along the extension direction of the piston rod three 16. The elastic member two 17 is located between the pressure plate two 41 and the hydraulic cylinder three 15.

[0041] The diagonal support member 18 is rotatably mounted on the pressure plate 2 41 at the top end of the piston rod 3 16 around the rotation axis extending forward and backward. The diagonal support member 2 37 is rotatably mounted on the top end of the piston rod 4 19 around the rotation axis extending forward and backward. The diagonal support member 2 37 is lower than the diagonal support member 18. When the elastic member 2 17 is in a natural state, the piston rod 3 16 extends outward to the state where the diagonal support member 18 protrudes from the diagonal support member 2 37 toward the center of the boom assembly.

[0042] The inner cavity of the hydraulic cylinder three 15 is connected to the inner cavity of the sealed chamber through a hose. When the two groups of symmetrical boom assemblies approach each other so that the two diagonal support members 18 are elastically pressed against the circular side plate 211 of the cable drum 21, the piston rod three 16 is retracted into the hydraulic cylinder three 15, and the hydraulic oil in the hydraulic cylinder three 15 is squeezed into the sealed chamber, thereby driving the piston rod four 19 to move upward, so that the diagonal support member two 37 is supported on the circular side plate 211 of the cable drum 21.

[0043] like Figure 6 , Figure 7 As shown, the extrusion member includes a fixed plate 24 and a movable plate 25. The fixed plate 24 is L-shaped and includes a vertical plate section 241 and a horizontal plate section 242 connected vertically. The horizontal plate section 242 is located on one side of the vertical plate section 241 facing the center of the boom assembly. The vertical plate section 241 is guided and slidably installed on the cylinder body 11 of the lifting cylinder, and the horizontal plate section 242 is fixedly connected to the above-mentioned main body section 13.

[0044] The movable plate 25 is coplanar with the fixed plate 24 and is fixedly connected to the movable section 14. When the lifting output end 12 of the lifting cylinder moves downward, the extrusion member is driven to move downward synchronously through the supporting legs.

[0045] Two telescopic support rods are provided, and both of the telescopic support rods extend in the front-to-back direction. A telescopic support rod is connected between each of the two movable plates 25 facing each other.

[0046] like Figure 8 As shown, the telescopic support rod includes a pipe section 22 and a rod section 23 slidably inserted in the pipe section 22. The rod section 23 and the pipe section 22 are respectively connected to two movable plates 25 opposite to each other at the front and back. A connecting hole 221 is provided on the side wall of the pipe section 22 near one end of the movable plate 25 to which it is connected.

[0047] The hydraulic oil supply assembly is provided with two groups, which are respectively used for supplying hydraulic oil to the two telescopic support rods.

[0048] like Figure 7 As shown, the hydraulic oil supply assembly includes a hydraulic cylinder four 29 and a connecting pipe 30. The hydraulic cylinder four 29 is installed on the movable plate 25 to which the pipe section 22 in the corresponding telescopic support rod is connected. The connecting pipe 30 is connected between the oil outlet of the hydraulic cylinder four 29 and the connecting hole 221 on the pipe section 22. When the pipe section 22 and the rod section 23 move away from each other, the hydraulic oil in the hydraulic cylinder four 29 is sucked into the inner cavity of the pipe section 22 through the connecting pipe 30.

[0049] The locking structure is provided with two groups, and the two groups of locking structures are respectively used to lock the two telescopic support rods.

[0050] like Figure 8 As shown, the locking structure includes a trigger block 31 and a plug 32. The trigger block 31 is slidably mounted on a movable plate 25 connected to the pipe section 22 and is located on the side of the corresponding movable plate 25 facing away from the pipe section 22. An elastic member 33 is connected between the trigger block 31 and the corresponding movable plate 25. The elastic member 33 is a compression spring that can be elastically extended forward and backward. The plug 32 is fixedly connected to the trigger block 31 and is located on the side of the trigger block 31 facing the corresponding movable plate 25. The plug 32 is slidably mounted on the corresponding movable plate 25 along the forward and backward direction and passes through the movable plate 25 and is inserted into the inner cavity of the pipe section 22 from the end of the pipe section 22.

[0051] During the process of the two front and rear opposing boom assemblies moving away from each other, the trigger block 31 is pressed against the circular side plate 211 in the cable drum 21, so that the trigger block 31 is pressed and moves toward the corresponding pipe segment 22, driving the plug 32 to move toward the corresponding pipe segment 22, blocking the connecting hole 221 on the pipe segment 22, so that the hydraulic oil in the pipe segment 22 is locked in the inner cavity of the pipe segment 22.

[0052] like Figure 1-Figure 4 as well as Figure 6 As shown, the driving mechanism includes a driving assembly 1 and a driving assembly 2. The driving assembly 1 includes a driving motor 4 and a transmission screw 38. The driving motor 4 is fixedly mounted on one of the baffles 1 in the main bracket. The transmission screw 38 extends in the left-right direction and is rotatably mounted between the two baffles 1 in the main bracket. The transmission screw 38 is located in the inner cavity of the above-mentioned crossbeam 2. The transmission screw 38 is transmission-connected with the driving motor 4. The threads on the left and right halves of the transmission screw 38 are in opposite directions. The two driving sliders 39 on the above-mentioned two longitudinal guide rails 5 are respectively threadedly mounted on the left and right halves of the transmission screw 38.

[0053] The driving motor 4 can drive the transmission screw 38 to rotate, and the transmission screw 38 drives the two longitudinal guide rails 5 to move closer to or away from each other synchronously, thereby driving the left and right symmetrical boom assemblies to move closer to or away from each other synchronously.

[0054] The driving component 2 includes a driving motor 2 6 and a transmission screw 20. The driving motor 2 6 is fixedly mounted on the above-mentioned vertical mounting plate 7. The transmission screw 20 extends in the front-to-back direction. The transmission screw 20 is fixed in the front-to-back position and rotates through the above-mentioned vertical mounting plate 7. The threads of the transmission screw 20 on the two halves on the front and rear sides of the vertical mounting plate 7 have opposite rotation directions. The above-mentioned two connecting rods 9 are respectively screwed on the front and rear halves of the transmission screw 20.

[0055] The driving motor 2 6 can drive the transmission screw 20 to rotate, and the transmission screw 20 drives the two connecting rods 9 to move closer to or farther away from each other synchronously, thereby driving the two sets of boom assemblies to move closer to or farther away from each other synchronously.

[0056] When the present invention is used, the size of the sling is first adjusted according to the size of the cable drum 21 to be suspended, and the drive motor 1 4 and the drive motor 2 6 are started respectively, and the distance between the two sets of boom assemblies is adjusted to: the spacing size of the two front and rear opposite extrusion members is smaller than but close to the spacing size of the two circular side plates 211 in the cable drum 21, the two front and rear opposite diagonal bracing members can be pressed on the two circular side plates 211 in the cable drum 21 respectively, and the spacing size of the legs in the two left and right symmetrical boom assemblies is larger than the outer diameter size of the cable drum 21. Then, the lifting cylinder is adjusted so that the lifting output end 12 of the lifting cylinder is extended to a total length of the lifting cylinder greater than the outer diameter size of the cable drum 21. In the process of adjusting the lifting cylinder, the trigger rod 27 drives the piston rod 1 35 to move downward, squeezes the hydraulic oil in the hydraulic cylinder 1 26 into the hydraulic cylinder 2 28, drives the piston rod 2 to extend outward, and moves the movable section 14 away from the main section 13, so that the position of the movable section 14 matches the size of the cable drum 21.

[0057] Thereafter, the hanger is moved downward through the suspension structure so that the cover of the hanger is set on the outside of the cable drum 21 from top to bottom, and then the driving motor 4 is started to make the left-right symmetrical boom assemblies approach each other, and the left-right symmetrical diagonal support members 18 approach each other, and finally press against the circumferential outer wall of the circular side plate 211 in the cable drum 21 to support the cable drum 21. While the diagonal support member 18 is elastically compressed, it drives the piston rod three 16 to be retracted into the hydraulic cylinder three 15. The hydraulic oil in the hydraulic cylinder three 15 is squeezed into the closed chamber, pushing the piston rod four 19 upward, driving the diagonal support member two 37 to be pressed against the circumferential outer wall of the circular side plate 211 in the cable drum 21 to support the cable drum 21.

[0058] Then, the drive motor 2 6 is started again to drive the two sets of boom assemblies to move away from each other, and the front and rear opposite extrusion members move away from each other, thereby pressing on the two circular side plates 211 of the cable drum 21, tightening the cable drum 21, and achieving relative fixation between the cable drum 21 and the boom mechanism.

[0059] In the process of the front and rear relative extrusion members moving away from each other, the telescopic support rod is pulled and extended, the pipe section 22 and the rod section 23 move away from each other, and the hydraulic oil in the hydraulic cylinder 29 is sucked into the inner cavity of the pipe section 22. In the process of the extrusion member being pressed against the circular side plate 211, the trigger block 31 is squeezed and moved by the circular side plate 211, driving the plug 32 to block the connecting hole 221 on the pipe section 22, so that the hydraulic oil remains in the inner cavity of the pipe section 22, so that the telescopic support rod can stably support the boom assembly.

[0060] The present invention can provide more firm support for the cable reel 21, and can avoid shaking and collision between the cable reel 21 and the lifting device during the transportation of the cable reel 21, so that the transportation process is safer. In addition, the present invention can lift and transport cable reels 21 of various sizes, and has a wider range of uses.

Claims

1. A lifting device for lifting a large cable drum, comprising a hanger and a lifting arm mechanism installed on the hanger, characterized in that: The boom mechanism includes two groups of boom assemblies arranged symmetrically in front and back and capable of approaching or moving away from each other in the front and back direction, and the boom assembly includes two groups of boom components arranged symmetrically in left and right and capable of approaching or moving away from each other in the left and right direction; The boom assembly includes a boom and a support foot connected to the bottom end of the boom, the support foot is located on the side of the boom facing the center of the boom assembly, and a diagonal support member 1 and an extrusion member are provided on the support foot, and the diagonal support member 1 is elastically slidably mounted on the support foot along a direction inclined from bottom to top toward the center of the boom assembly; The diagonal support member 1 is used to elastically press against the circumferential side wall of the circular side plate in the cable drum to support the cable drum as the two groups of left-right symmetrical boom assemblies approach each other; The extrusion piece is used to stop the circular side plate in the cable drum front and back after the diagonal support piece lifts the cable drum. The two sets of suspension arm combinations are used to move away from each other after the diagonal support piece lifts the cable drum, so as to drive the front and rear opposite extrusion pieces to move away from each other, so that the front and rear opposite extrusion pieces are pressed against the circular side plate from the inside to the outside to tighten the cable drum.

2. A lifting device for lifting a large cable drum according to claim 1, characterized in that: The boom can be extended and retracted up and down, and the support leg includes a main body section and a movable section. The main body section is fixedly connected to the bottom end of the boom, and the movable section can be movably installed in the left and right directions on the end of the main body section facing away from the boom. A diagonal support member 1 is installed on the main body section, and a diagonal support member 2 is installed on the movable section. The diagonal support member 2 is located below the diagonal support member 1. The diagonal support member 2 is used to be pressed against the circumferential outer wall of the circular side plate of the cable drum as the two groups of boom assemblies that are symmetrical on the left and right approach each other.

3. A lifting device for lifting a large cable drum according to claim 2, characterized in that: The boom adopts a vertically extending lifting cylinder, the lifting output end of the lifting cylinder faces downward, and the main body section is connected to the lifting output end of the lifting cylinder.

4. A lifting device for lifting a large cable drum according to claim 3, characterized in that: The lifting cylinder is in transmission connection with the movable section, and the movable section can be driven to move back to the main section when the lifting output end of the lifting cylinder extends downward.

5. A lifting device for lifting a large cable drum according to claim 4, characterized in that: A hydraulic cylinder 1 is fixedly installed on the cylinder body of the lifting cylinder. A piston rod 1 is vertically inserted into the hydraulic cylinder 1. The piston rod 1 is connected to the main body section. A hydraulic cylinder 2 is fixedly installed on the main body section. A piston rod 2 is inserted into the hydraulic cylinder 2 along the left and right directions. The piston rod 2 is connected to the movable section. The inner cavities of the hydraulic cylinder 1 and the hydraulic cylinder 2 are connected. The downward movement of the driving output end of the lifting cylinder drives the piston rod 1 to move downward, thereby squeezing the hydraulic oil in the hydraulic cylinder 1 into the hydraulic cylinder 2 to drive the piston rod 2 to drive the movable section to move back to the main section.

6. A lifting device for lifting a large cable drum according to any one of claims 2 to 5, characterized in that: A hydraulic cylinder three is installed on the main section, and a piston rod three is elastically penetrated in the hydraulic cylinder three and inclined from bottom to top toward the center of the boom assembly, and a diagonal support piece one is connected to the top end of the piston rod three; a sealed chamber is provided on the movable section, and a piston rod four is vertically penetrated in the sealed chamber, and a diagonal support piece two is connected to the top end of the piston rod four. The inner cavity of the hydraulic cylinder three is connected to the sealed chamber, and the diagonal support piece one protrudes from the diagonal support piece two toward the center of the boom assembly when it does not contact the cable drum. In the process of the left-right symmetrical boom assemblies approaching each other, the diagonal support piece one is squeezed by the cable drum and drives the piston rod three to move downward, so as to squeeze the hydraulic oil in the hydraulic cylinder three into the sealed chamber, thereby driving the piston rod four to move upward so that the diagonal support piece two is supported on the circular side plate of the cable drum.

7. A lifting device for lifting a large cable drum according to any one of claims 2 to 5, characterized in that: The extrusion piece comprises a coplanar fixed plate and a movable plate, wherein the fixed plate is fixedly connected to the main body section, and the movable plate is fixedly connected to the movable section.

8. A lifting device for lifting a large cable drum according to any one of claims 2 to 5, characterized in that: A telescopic support rod extending forward and backward is connected between each front and rear opposing groups of extruded parts. The telescopic support rod includes a pipe section and a rod section movably inserted in the pipe section. A hydraulic oil supply assembly and a locking structure are connected to the movable section. The hydraulic oil supply assembly is used to inject hydraulic oil into the pipe section when the rod section and the pipe section move away from each other. The locking structure is used to lock the hydraulic oil in the inner cavity of the pipe section when the rod section and the pipe section are relatively stationary.

9. A lifting device for lifting a large cable drum according to claim 8, characterized in that: The telescopic support rod is connected between two movable plates which are opposite to each other at the front and the back.

10. A lifting device for lifting a large cable drum according to claim 9, characterized in that: The hydraulic oil supply assembly includes a hydraulic cylinder four, the inner cavity of which is connected to the inner cavity of the pipe section, and the hydraulic oil in the hydraulic cylinder four is sucked into the inner cavity of the pipe section during the process of the rod section and the pipe section moving away from each other; the locking structure includes a trigger block elastically slidably mounted on the movable plate for front and rear sliding, and a plug connected to the trigger block, the trigger block is located at one end of the movable plate facing away from the telescopic support rod, the plug passes through the movable plate in the front and rear direction and is inserted into the inner cavity of the pipe section, the trigger block is used to be squeezed by the circular side plate of the cable drum and move toward the pipe section during the process of tightening the cable drum, so as to drive the plug to move in the pipe section to seal the connecting area between the pipe section and the hydraulic cylinder four.

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