Special lifting appliance for lifting boom of large crawler crane

Abstract

The invention relates to the technical field of hoisting, and discloses a special hoisting tool for hoisting a boom of a large crawler crane, which comprises a cross beam, adjusting mechanisms are arranged at two ends of the cross beam, a square frame is arranged at the upper ends of the adjusting mechanisms, a second power mechanism and a limiting assembly are arranged in the square frame, and the second power mechanism is used for providing power for the limiting assembly. A hanger shaft is arranged in the upper end of the second power mechanism; the clamping device comprises an adjusting mechanism, first power mechanisms are arranged on the front side and the rear side of the adjusting mechanism correspondingly, a clamping assembly is arranged at the lower end of the adjusting mechanism, and the first power mechanisms are used for providing power for the clamping assembly. And at the moment, clamping of the crane boom can be achieved under the cooperation of the clamping assembly, and compared with a traditional mode, the clamping time is greatly shortened, and the hoisting efficiency is improved. And meanwhile, personnel operation is reduced, and operation safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, in particular to a special hoisting device for hoisting a large crawler crane boom. Background Art

[0002] Large crawler crane booms have various structural types, with variable-length truss structures being the most common. Based on the boom structure, they can be divided into lattice boom crawler cranes and crawler tower cranes. Lattice boom crawler cranes feature a main boom and a jib, both of which can be lengthened or shortened as needed. Crawler tower cranes utilize the variable-length truss boom as the tower body, with the jib serving as the boom.

[0003] During the extension process of a lattice boom crawler crane, each lattice boom section needs to be hoisted and docked using a lifting device. Traditionally, rope tying is often used for lifting. While this method is inexpensive, it lacks stability and is cumbersome to operate. Not only does it require tying knots, but it's also time-consuming to untie, impacting work efficiency. Therefore, a solution to this problem is urgently needed. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a special hoisting device for hoisting the boom of a large crawler crane.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a special lifting device for lifting the boom of a large crawler crane, including a crossbeam, both ends of the crossbeam are provided with an adjustment mechanism, the upper end of the adjustment mechanism is provided with a square frame, a second power mechanism and a limiting component are provided inside the square frame, the second power mechanism is used to provide power to the limiting component, and a lifting shaft is provided inside the upper end of the second power mechanism; a first power mechanism is provided on both the front and rear sides of the adjustment mechanism, a clamping component is provided at the lower end of the adjustment mechanism, and the first power mechanism is used to provide power to the clamping component.

[0008] Furthermore, the adjustment mechanism includes a square tube, a threaded rod, a moving block, a moving tube and a dual-axis motor. The two ends of the crossbeam are fixedly connected to the square tube, the inside of the square tube is rotatably connected to the threaded rod, the circumferential surface of the threaded rod is threadedly connected to the moving block, the moving block and the square tube are slidingly connected, the two sides of the moving block are fixedly connected to the moving tube, the moving tube is sleeved on the outside of the square tube and is slidingly connected to the square tube, and the upper end of the moving tube is fixedly connected to the square frame; the dual-axis motor is fixedly connected to the inside of the crossbeam, and the output end of the dual-axis motor is fixedly connected to the threaded rod.

[0009] Furthermore, square holes are provided on both sides of the square tube, and the two sides of the moving block pass through the square holes.

[0010] Furthermore, two threaded rods are provided and are symmetrically distributed on both sides of the dual-axis motor, and the external threads of the two threaded rods have opposite thread directions.

[0011] Furthermore, the first power mechanism includes a hydraulic telescopic rod, a movable frame and a first transmission rod. Both sides of the movable cylinder are fixedly connected with the hydraulic telescopic rod. The protruding end of the hydraulic telescopic rod is fixedly connected with the movable frame. The lower end of the movable frame is rotatably connected with the first transmission rod.

[0012] Furthermore, a second guide rod is slidably connected inside the movable frame, and both ends of the second guide rod are fixedly connected to fixed blocks, and the fixed blocks are fixedly connected to the movable cylinder.

[0013] Furthermore, the clamping assembly includes a fixed seat, a pin shaft and a hook. The lower end of the movable cylinder is fixedly connected to the fixed seat, the interior of the fixed seat is fixedly connected to the pin shaft, and the circumferential surface of the pin shaft is rotatably connected to the hook; the upper end of the hook is rotatably connected to the first transmission rod.

[0014] Furthermore, the second power mechanism includes a moving frame and a second transmission rod. The moving frame is slidably connected to the upper end of the square frame, a hanging shaft is fixedly connected to the upper end of the moving frame, and the second transmission rod is rotatably connected to the lower end of the moving frame.

[0015] Furthermore, the limiting assembly includes a limiting hole, a first guide rod, a movable plate and a limiting rod. The first guide rod is fixedly connected to the inside of the square frame. The movable plate is slidably connected to the circumferential surface of the first guide rod. The movable plate is rotatably connected to the second transmission rod. The side end of the movable plate is fixedly connected to the limiting rod. The limiting rod passes through the movable plate and the square frame, and is slidably connected to the movable plate and the square frame. A limiting hole is opened on the side end surface of the movable frame, and the limiting hole corresponds to the limiting rod.

[0016] Furthermore, a spring is provided on the first guide rod, and both ends of the spring are fixedly connected to the movable plate respectively.

[0017] Beneficial effects

[0018] The present invention provides a special lifting device for lifting the boom of a large crawler crane. It has the following beneficial effects:

[0019] 1. By setting up a first power mechanism and a clamping assembly, when in use, the first power mechanism provides power to the clamping assembly, and then with the cooperation of the clamping assembly, the crane boom can be clamped. Compared with traditional methods, this greatly shortens the clamping time and improves the lifting efficiency. At the same time, it reduces the number of personnel operations and improves the safety of the operation.

[0020] 2. By setting up a square cylinder, a threaded rod, a moving block, a moving cylinder and a dual-axis motor, when in use, the dual-axis motor works, and can drive the two threaded rods to rotate at the same time. Since the external threads of the two threaded rods are in opposite directions, the two moving blocks can be driven to move at the same time. As the two moving blocks move, the moving cylinder can be driven to move, thereby changing the distance between the two clamping components. This makes it easy to adapt to arms of different sizes, thereby improving the practicality of the device.

[0021] 3. By setting a movable frame, a second transmission rod, a limiting hole, a first guide rod, a movable plate and a limiting rod, when in use, the lifting rope is connected to the lifting shaft, and then the crane works to reel in the lifting rope, and then drives the lifting shaft to move upward. As the lifting shaft moves upward, the movable frame is also driven to move upward, and then, with the cooperation of the second transmission rod, the movable plate can be driven to slide on the first guide rod. As the movable plate moves, the limiting rod is driven to extend outward, thereby being inserted into the limiting hole of the movable frame, thereby realizing the limitation of the movable frame, effectively preventing the movable frame from moving downward, and thus achieving stable clamping of the arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the present invention from a first perspective;

[0023] Figure 2 For the present invention Figure 1 Enlarged view of part A;

[0024] Figure 3 For the present invention Figure 1 Enlarged view of part B;

[0025] Figure 4 This is a schematic structural diagram of the second viewing angle of the present invention as a whole;

[0026] Figure 5 For the present invention Figure 4 Enlarged view of part C in the middle;

[0027] Figure 6 It is a schematic structural diagram of the present invention after front view cross section;

[0028] Figure 7 It is a schematic diagram of the structure of the present invention after top view cross section;

[0029] Figure 8 For the present invention Figure 7 Enlarged view of part D in the middle.

[0030] In the figure: 1. crossbeam; 2. adjusting mechanism; 201. square tube; 202. threaded rod; 203. moving block; 204. moving tube; 205. dual-axis motor; 3. square frame; 4. first power mechanism; 401. hydraulic telescopic rod; 402. moving frame; 403. first transmission rod; 5. clamping assembly; 501. fixing seat; 502. pin; 503. hook; 6. limiting assembly; 601. limiting hole; 602. first guide rod; 603. moving plate; 604. limiting rod; 7. second power mechanism; 701. moving frame; 702. second transmission rod; 8. square hole; 9. hanging shaft; 10. fixing block; 11. second guide rod; 12. spring. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] See also Figures 1 to 8 A special hoist for lifting the boom of a large crawler crane includes a crossbeam 1, with adjusting mechanisms 2 provided at both ends of the crossbeam 1, a square frame 3 provided at the upper end of the adjusting mechanism 2, a second power mechanism 7 and a limiting component 6 provided inside the square frame 3, the second power mechanism 7 is used to provide power to the limiting component 6, and a lifting shaft 9 is provided inside the upper end of the second power mechanism 7; first power mechanisms 4 are provided on the front and rear sides of the adjusting mechanism 2, a clamping component 5 is provided at the lower end of the adjusting mechanism 2, and the first power mechanism 4 is used to provide power to the clamping component 5.

[0033] During use, the crane rope is connected to the suspension shaft 9, and the distance between the clamping assemblies 5 is adjusted according to the specifications of the boom. During adjustment, the adjustment mechanism 2 is activated, and the distance between the clamping assemblies 5 can be changed to adapt to different specifications of booms. After adjustment, the first power mechanism 4 is activated to provide power to the clamping assembly 5. At this time, with the cooperation of the clamping assembly 5, the crane boom can be clamped. Compared with traditional methods, the clamping time is greatly shortened and the lifting efficiency is improved. At the same time, the operation of personnel is reduced and the operation safety is improved. After the clamping is completed, the crane is operated to reel in the lifting rope, and then drive the suspension shaft 9 to move upward. As the suspension shaft 9 moves upward, it provides power to the second power mechanism 7. Then, with the cooperation of the limiting assembly 6, the first power mechanism 4 is limited, avoiding accidental operation, so that the clamping assembly 5 can release the clamping of the boom, so that the clamping assembly 5 can stably clamp the boom. After the clamping is completed, the crane is used to lift the boom installation position, completing the assembly of the large crawler crane boom.

[0034] The adjusting mechanism 2 includes a square cylinder 201, a threaded rod 202, a moving block 203, a moving cylinder 204 and a dual-axis motor 205. The two ends of the crossbeam 1 are fixedly connected to the square cylinder 201. The threaded rod 202 is rotatably connected inside the square cylinder 201. The circumferential surface of the threaded rod 202 is threadedly connected to the moving block 203. The moving block 203 is slidably connected to the square cylinder 201. Both sides of the moving block 203 are fixedly connected to the moving cylinder 204. The moving cylinder 204 is sleeved on the outside of the square cylinder 201 and is slidably connected to the square cylinder 201. The upper end of the moving cylinder 204 is fixedly connected to the square frame 3; the dual-axis motor 205 is fixedly connected to the inside of the crossbeam 1. The output end of 205 is fixedly connected to the threaded rod 202; there are two threaded rods 202, which are symmetrically distributed on both sides of the dual-axis motor 205, and the external threads of the two threaded rods 202 are in opposite directions; when working, the dual-axis motor 205 is working, and at this time it can drive the two threaded rods 202 to rotate at the same time. Since the external threads of the two threaded rods 202 are in opposite directions, the two moving blocks 203 can be driven to move at the same time. As the two moving blocks 203 move, the moving cylinder 204 can be driven to move, thereby changing the distance between the two clamping components 5, which is convenient for adapting to arms of different sizes, thereby improving the practicality of the device.

[0035] Square holes 8 are provided on both sides of the square cylinder 201, and the square holes 8 are passed through on both sides of the moving block 203. When working, the square holes 8 are provided, and under the action of the square holes 8, the moving block 203 can drive the moving cylinder 204 to move.

[0036] The first power mechanism 4 includes a hydraulic telescopic rod 401, a mobile frame 402 and a first transmission rod 403. The hydraulic telescopic rod 401 is fixedly connected to both sides of the mobile cylinder 204. The protruding end of the hydraulic telescopic rod 401 is fixedly connected to the mobile frame 402. The lower end of the mobile frame 402 is rotatably connected to the first transmission rod 403. When working, the four hydraulic telescopic rods 401 are controlled to extend at the same time, and the mobile frame 402 can be driven to move downward, thereby driving the first transmission rod 403 to move downward, thereby providing power for the movement of the clamping assembly 5.

[0037] The movable frame 402 is internally slidably connected to a second guide rod 11, and both ends of the second guide rod 11 are fixedly connected to fixed blocks 10. The fixed block 10 is fixedly connected to the movable cylinder 204. During operation, by setting the second guide rod 11 and the fixed block 10, the movement of the movable frame 402 can be limited, so that the movable frame 402 can move vertically smoothly.

[0038] The clamping assembly 5 includes a fixed seat 501, a pin 502 and a hook 503. The lower end of the movable cylinder 204 is fixedly connected to the fixed seat 501, and the inside of the fixed seat 501 is fixedly connected to the pin 502. The circumferential surface of the pin 502 is rotatably connected to the hook 503; the upper end of the hook 503 is rotatably connected to the first transmission rod 403. During operation, as the movable frame 402 moves downward, the hook 503 can be driven to rotate around the pin 502 with the cooperation of the first transmission rod 403, thereby realizing the clamping of the arm.

[0039] The second power mechanism 7 includes a moving frame 701 and a second transmission rod 702. The moving frame 701 is slidably connected to the upper end of the square frame 3. The hanging shaft 9 is fixedly connected to the upper end of the moving frame 701. The lower end of the moving frame 701 is rotatably connected to the second transmission rod 702. The limiting component 6 includes a limiting hole 601, a first guide rod 602, a moving plate 603 and a limiting rod 604. The first guide rod 602 is fixedly connected to the inside of the square frame 3. The circumferential surface of the first guide rod 602 is slidably connected to the moving plate 603. The moving plate 603 is rotatably connected to the second transmission rod 702. The side end of the moving plate 603 is fixedly connected to the limiting rod 604. The limiting rod 604 passes through the moving plate 603 and the square frame 3, and is connected to the moving plate 603 and the square frame 3. Frame 3 is slidably connected; a limiting hole 601 is provided on the side end face of the movable frame 402, and the limiting hole 601 corresponds to the limiting rod 604. During operation, the lifting rope is connected to the lifting shaft 9, and then the crane works to reel in the lifting rope, and then drives the lifting shaft 9 to move upward. As the lifting shaft 9 moves upward, the movable frame 701 is also driven to move upward, and then, with the cooperation of the second transmission rod 702, the movable plate 603 can be driven to slide on the first guide rod 602. As the movable plate 603 moves, the limiting rod 604 is driven to extend outward, thereby being inserted into the limiting hole 601 of the movable frame 402, thereby realizing the limitation of the movable frame 402 and effectively avoiding the downward movement of the movable frame 402, thereby realizing the stable clamping of the arm.

[0040] A spring 12 is provided on the first guide rod 602, and both ends of the spring 12 are fixedly connected to the movable plate 603. During operation, as the two movable plates 603 move toward each other, the spring 12 can be compressed, and the compressed spring 12 can provide a reverse thrust to the movable plate 603, thereby facilitating the resetting of the movable plate 603. As the movable plate 603 is reset, the limiting rod 604 is disengaged from the limiting hole 601, thereby releasing the limitation on the movable frame 402, which is conducive to releasing the clamping of the arm frame.

[0041] Working principle:

[0042] When in use, connect the rope of the crane to the hanging shaft 9, and then adjust the distance between the clamping components 5 according to the specifications of the boom. When adjusting, the dual-axis motor 205 works, and the two threaded rods 202 can be driven to rotate at the same time. Since the external threads of the two threaded rods 202 are in opposite directions, the two moving blocks 203 can be driven to move at the same time. As the two moving blocks 203 move, the moving cylinder 204 can be driven to move, thereby changing the distance between the two clamping components 5. After the distance between the clamping components 5 is adjusted, the four hydraulic telescopic rods 401 are controlled to extend at the same time, and the moving frame 402 can be driven to move downward. As the moving frame 402 moves downward, the first transmission rod 403 can cooperate with the moving frame 402 to move downward. To drive the hook 503 to rotate around the pin shaft 502, thereby achieving the clamping of the boom. After the boom is clamped, the crane works to reel in the lifting rope, and then drives the suspension shaft 9 to move upward. As the suspension shaft 9 moves upward, the moving frame 701 is also driven to move upward, and then, with the cooperation of the second transmission rod 702, the moving plate 603 can be driven to slide on the first guide rod 602. As the moving plate 603 moves, the limiting rod 604 is driven to extend outward, thereby being inserted into the limiting hole 601 of the moving frame 402, thereby achieving the limitation of the moving frame 402 and effectively avoiding the downward movement of the moving frame 402, thereby achieving stable clamping of the boom. The boom is then lifted by the crane to the installation position, thereby achieving the assembly of the large crawler crane boom.

[0043] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A special lifting device for lifting the boom of a large crawler crane, characterized by: The invention comprises a crossbeam (1), wherein both ends of the crossbeam (1) are provided with an adjusting mechanism (2), the upper end of the adjusting mechanism (2) is provided with a square frame (3), a second power mechanism (7) and a limiting component (6) are provided inside the square frame (3), the second power mechanism (7) is used to provide power to the limiting component (6), and a suspension shaft (9) is provided inside the upper end of the second power mechanism (7); a first power mechanism (4) is provided on both the front and rear sides of the adjusting mechanism (2), a clamping component (5) is provided at the lower end of the adjusting mechanism (2), and the first power mechanism (4) is used to provide power to the clamping component (5).

2. A special lifting device for lifting a large crawler crane boom according to claim 1, characterized in that: The regulating mechanism (2) comprises a square tube (201), a threaded rod (202), a moving block (203), a moving tube (204) and a double-axis motor (205); both ends of the crossbeam (1) are fixedly connected to the square tube (201); the threaded rod (202) is rotatably connected inside the square tube (201); the circumferential surface of the threaded rod (202) is threadedly connected to the moving block (203); the moving block (203) is slidably connected to the square tube (201); both sides of the moving block (203) are fixedly connected to the moving tube (204); the moving tube (204) is sleeved outside the square tube (201) and slidably connected to the square tube (201); the upper end of the moving tube (204) is fixedly connected to the square frame (3); the double-axis motor (205) is fixedly connected inside the crossbeam (1); the output end of the double-axis motor (205) is fixedly connected to the threaded rod (202).

3. The special lifting device for lifting the boom of a large crawler crane according to claim 2, characterized in that: Square holes (8) are provided on both sides of the square tube (201), and the square holes (8) are passed through on both sides of the moving block (203).

4. The special lifting device for lifting the boom of a large crawler crane according to claim 2, characterized in that: Two threaded rods (202) are provided and symmetrically distributed on both sides of the dual-axis motor (205), and the external threads of the two threaded rods (202) have opposite thread directions.

5. The special lifting device for lifting the boom of a large crawler crane according to claim 2, characterized in that: The first power mechanism (4) comprises a hydraulic telescopic rod (401), a moving frame (402) and a first transmission rod (403); both sides of the moving cylinder (204) are fixedly connected to the hydraulic telescopic rod (401); the extended end of the hydraulic telescopic rod (401) is fixedly connected to the moving frame (402); and the lower end of the moving frame (402) is rotatably connected to the first transmission rod (403).

6. The special lifting device for lifting the boom of a large crawler crane according to claim 5, characterized in that: A second guide rod (11) is slidably connected inside the movable frame (402), and both ends of the second guide rod (11) are fixedly connected to fixed blocks (10), and the fixed blocks (10) are fixedly connected to the movable cylinder (204).

7. The special lifting device for lifting the boom of a large crawler crane according to claim 5, characterized in that: The clamping assembly (5) comprises a fixed seat (501), a pin shaft (502) and a hook (503); the lower end of the movable cylinder (204) is fixedly connected to the fixed seat (501); the interior of the fixed seat (501) is fixedly connected to the pin shaft (502); the circumferential surface of the pin shaft (502) is rotatably connected to the hook (503); the upper end of the hook (503) is rotatably connected to the first transmission rod (403).

8. The special lifting device for lifting the boom of a large crawler crane according to claim 5, characterized in that: The second power mechanism (7) comprises a moving frame (701) and a second transmission rod (702); the upper end of the square frame (3) is slidably connected to the moving frame (701); the upper end of the moving frame (701) is fixedly connected to a suspension shaft (9); and the lower end of the moving frame (701) is rotatably connected to the second transmission rod (702).

9. The special lifting device for lifting the boom of a large crawler crane according to claim 8, characterized in that: The limiting assembly (6) comprises a limiting hole (601), a first guide rod (602), a movable plate (603) and a limiting rod (604); the first guide rod (602) is fixedly connected to the interior of the square frame (3); the movable plate (603) is slidably connected to the circumferential surface of the first guide rod (602); the movable plate (603) is rotatably connected to the second transmission rod (702); the side end of the movable plate (603) is fixedly connected to the limiting rod (604); the limiting rod (604) passes through the movable plate (603) and the square frame (3) and is slidably connected to the movable plate (603) and the square frame (3); the side end surface of the movable frame (402) is provided with a limiting hole (601), and the limiting hole (601) corresponds to the limiting rod (604).

10. The special lifting device for lifting the boom of a large crawler crane according to claim 9, characterized in that: A spring (12) is provided on the first guide rod (602), and both ends of the spring (12) are fixedly connected to the movable plate (603) respectively.

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