Large-tonnage container hoisting crane and hoisting method thereof

Abstract

The invention relates to the technical field of cranes, in particular to a large-tonnage container hoisting crane and a hoisting method thereof.The large-tonnage container hoisting crane comprises a traveling crane and a hoisting device used for hoisting a square box; the first traction mechanism is arranged on the travelling crane through a right-angle bearing bracket and is used for pulling the lifting device to vertically lift in a labor-saving manner; and the second traction mechanism is arranged on the travelling crane through a right-angle bearing bracket. The two opening and closing swing arms are arranged on the traveling crane with the main portal frame as the main body, the first traction rope with the component force effect is connected between the two opening and closing swing arms and the traveling crane, and the leveling tool conducts telescopic regulation and control on the reciprocating chain used for directly dragging the loading flat plate and the anti-unhooking hook head inhaul cable; and the locking tool is used for locking and fixing the hoisting pull rod sleeved in the plastic opening and closing plate group so as to adjust and maintain the horizontal state of the loading flat plate hoisting square box.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a large-tonnage container hoisting crane and a hoisting method thereof. Background Art

[0002] Cranes are generally used to lift containers, but containers are prone to shaking and other unstable situations during the lifting process, which will bring certain safety hazards to the crane and the operator.

[0003] Large-tonnage containers are often hoisted using a rail-mounted container crane lifting clamp, such as that proposed in application number CN202410430442.3. It is believed that excessive squeezing pressure between the clamping wall and the outer wall of the container may damage the outer wall of the container and the cargo inside it, and the container may shake during transportation. Therefore, it is proposed to synchronously lock the clamping parts during clamping to prevent the container from shaking during transportation. However, the clamping of the container by the clamping frame is also unidirectional, and can only achieve horizontal clamping in the left and right or front and back directions. During the lifting process, due to the influence of vibration and gravity, the container and the clamping parts are very likely to slip. Although the clamping parts are locked, a flexible connection method is often used between the crane and the load-bearing shell in the lifting device. The container will still be unbalanced due to the combined influence of factors such as uneven distribution of internal weight or inertia during lifting. A single lifting structure is difficult to balance and adjust it, which will cause serious imbalance of the container.

[0004] Just like the container crane proposed in application number CN201380032493.0, it proposes to accurately detect obstacles within a wider range and can suppress the cost increase caused by the increase in the number of components or the complexity of the control system. However, the one-sided gantry structure poses a great balance threat to the lifting of large-tonnage containers, and the range of lifting movement is extremely limited. More importantly, it fails to adopt a labor-saving design for the winch device used to tow the container, and relies entirely on strong power output to lift the container. Directly lifting the large-tonnage container puts a huge load pressure on the crane, which also causes great inconvenience to transportation, seriously affecting the efficiency, level and safety of the lifting operation. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem in the prior art that it is difficult for cranes to lift large-tonnage containers smoothly and labor-savingly, and to propose a large-tonnage container lifting crane and a lifting method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A large-tonnage container lifting crane comprises a crane and a hoist for lifting square containers, wherein the crane is provided with:

[0008] A right-angle load-bearing bracket, wherein the right-angle load-bearing bracket is fixedly arranged on the vehicle;

[0009] A first traction mechanism, which is arranged on the crane through a right-angle load-bearing bracket and is used for vertically lifting and lowering the labor-saving traction crane;

[0010] A second traction mechanism, which is arranged on the vehicle through a right-angle load-bearing bracket and is used for labor-saving pulling of the first traction mechanism;

[0011] The balance maintaining mechanism is arranged between the hoist and the first traction mechanism, and the balance maintaining mechanism is used to adjust and maintain the hoist to a balanced state with the first traction mechanism as a fulcrum.

[0012] Preferably, the traveling crane includes a main gantry extending left and right, and two right-angled opening and closing pillars extending forward and backward to form a secondary gantry are movably provided on the main gantry, and the lower ends of the main gantry and the right-angled opening and closing pillars are both equipped with locking universal wheels.

[0013] Preferably, the hoist comprises a load-bearing plate, in which a fixing fixture for clamping the square box from the front and back, left and right and supporting it upward is movably provided.

[0014] Preferably, the right-angle load-bearing bracket is integrally connected to the main gantry.

[0015] Preferably, the first traction mechanism includes a lifting pulley, and a first traction roller is provided on the right-angle load-bearing bracket, and a first traction rope for vertically lifting the hoist with effortless traction is connected between the lifting pulley and the first traction roller.

[0016] Preferably, the lifting pulley is located directly above the load-bearing plate.

[0017] Preferably, the second traction mechanism includes a movable pulley movably arranged on a right-angle load-bearing bracket, the main gantry is provided with a second traction roller, and a second traction rope is connected between the movable pulley and the second traction roller for labor-saving traction of the first traction roller to rotate.

[0018] Preferably, the balance maintaining mechanism includes four sets of leveling fixtures for pulling the load plate to a horizontal state, and two sets of locking fixtures for fixing the load plate in a horizontal state are provided between the lifting movable pulley and the load plate.

[0019] Preferably, the four groups of leveling tools are distributed radially, and the two groups of locking tools are distributed symmetrically on the left and right.

[0020] Regarding the above-mentioned hoisting method of a large-tonnage container hoisting crane, the hoisting method includes the following steps:

[0021] Step S1, fixing the square box by the fixing fixture;

[0022] Step S2, controlling the second traction roller to rotate so as to rotate the first traction roller, and lifting the box to a height of 0.5 m from the ground;

[0023] Step S3, adjusting the load plate to a horizontal state by the leveling tool, and then fixing the horizontal state by the locking tool;

[0024] Step S4, controlling the second traction roller to rotate so as to rotate the first traction roller, and lifting the box by a hoist to adjust the height;

[0025] Step S5, controlling the two right-angled opening and closing struts to unfold along the front-back direction, assisting the main gantry to move the crane to adjust the displacement of the hoisted box.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The present invention provides two opening and closing swing arms on the traveling crane with the main gantry as the main body, and utilizes the meshing transmission between the driving worm and the driven worm gear to realize the deflection adjustment of the right-angle opening and closing pillars, so that the traveling crane has a front-to-back and left-to-right symmetrical movable support, ensuring that it can provide balance and stability for the lifting operation of the mobile square box.

[0028] 2. The present invention utilizes a load-bearing plate to set up a hoist, wherein four radially distributed fixing clamps are provided, and the fixing clamps are doubly driven by a transmission slider and a guide wedge, so that the tilted, telescopic and lifting fixing clamps can firmly clamp and fix the other box.

[0029] 3. The present invention provides a first traction mechanism consisting of a first fixed pulley, a first traction roller and a lifting movable pulley on the traveling crane, and connects a first traction rope with a force component effect between the three. The traction connection between the lifting movable pulley and the load-bearing plate is used to perform labor-saving traction on the crane.

[0030] 4. The present invention is provided with a second traction mechanism on the traveling crane, which is composed of a driving gear, a driven gear, an elastic limiter, a movable pulley, a second fixed pulley and a second traction roller, and a second traction rope with a force distribution effect is provided between the movable pulley, the second fixed pulley and the second traction roller to perform a labor-saving rotational drive on the first traction roller, thereby realizing a dual labor-saving traction drive of the hoist.

[0031] 5. The present invention sets a level detector, a controller, a leveling tool and a locking tool between the lifting pulley and the load plate. The leveling tool adjusts and controls the reciprocating chain and the anti-hook head cable used to directly pull the load plate, and the locking tool locks and fixes the lifting rod installed in the plastic tensioning plate group to adjust and maintain the horizontal state of the load plate lifting box. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural schematic diagram of a large-tonnage container lifting crane proposed by the present invention;

[0033] Figure 2 This is a bottom view of the structure of a large-tonnage container lifting crane proposed by the present invention;

[0034] Figure 3 This is a schematic diagram of the driving structure of a large-tonnage container lifting crane proposed by the present invention;

[0035] Figure 4 This is a schematic diagram of the cross-sectional structure of a large-tonnage container lifting crane proposed by the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of a hoist of a large-tonnage container lifting crane proposed by the present invention;

[0037] Figure 6 This is a schematic diagram of the structure of a hoist of a large-tonnage container lifting crane proposed by the present invention when viewed from above;

[0038] Figure 7 This is a structural schematic diagram of a large-tonnage container lifting crane proposed by the present invention, including a hoist, a right-angle load-bearing bracket, a first traction mechanism, a second traction mechanism, and a balance maintaining mechanism;

[0039] Figure 8 This is a schematic cross-sectional view of the structure of a hoist, right-angle load-bearing bracket, first traction mechanism, second traction mechanism and balance maintaining mechanism of a large-tonnage container lifting crane proposed by the present invention;

[0040] Figure 9 This is a schematic structural diagram of a balance maintaining mechanism of a large-tonnage container lifting crane proposed by the present invention;

[0041] Figure 10 The present invention provides a schematic cross-sectional structural diagram of a balance maintaining mechanism for a large-tonnage container lifting crane.

[0042] In the picture:

[0043] 1. Crane; 11. Main gantry; 12. Middle cavity; 13. Storage slot; 14. Driving worm; 15. Driven worm gear; 16. Opening and closing swing arm; 17. Right-angle opening and closing support; 18. Locking universal wheel;

[0044] 2. Hoist; 21. Loading platform; 22. Double-ended rocker; 23. Long guide hole; 24. Transmission slide; 25. First connecting rod; 26. Guide wedge; 27. Fixing fixture; 28. Synchronous sleeve; 29. ​​Second connecting rod;

[0045] 3. Right-angle load-bearing bracket;

[0046] 4. First traction mechanism; 41. First fixed pulley; 42. First traction roller; 43. Lifting movable pulley; 44. First traction rope;

[0047] 5. Second traction mechanism; 51. Damping shaft; 52. Driving gear; 53. Driven gear; 54. Y-shaped rocker;

[0048] 55. Elastic limiter; 551. Guide screw; 552. Telescopic threaded sleeve; 553. Cross elastic telescopic rod;

[0049] 56. Opening and closing swing rod; 57. Moving pulley; 58. Second fixed pulley; 59. Second traction roller; 510. Second traction rope;

[0050] 6. Balance maintenance mechanism;

[0051] 61. Level detector; 62. Controller;

[0052] 63. Leveling tool; 631. Drive motor; 632. Drive flywheel; 633. Reciprocating chain; 634. Anti-unhooking cable; 635. Load pull ring;

[0053] 64. Locking fixture; 641. Funnel sleeve; 642. Plastic tensioning plate assembly; 643. Spiral booster head; 644. Lifting rod; 645. Stress-bearing section; 646. Boosting section. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0055] Reference Figures 1-10 A large-tonnage container lifting crane includes a crane 1 and a hoist 2 for lifting square boxes. The crane 1 is provided with a right-angle load-bearing bracket 3, a first traction mechanism 4, a second traction mechanism 5, and a balance maintaining mechanism 6:

[0056] The crane 1 includes a main gantry 11 extending left and right, with two right-angled struts 17 extending forward and backward to form a secondary gantry. Both the main gantry 11 and the right-angled struts 17 are equipped with locking universal wheels 18 at their lower ends. It should be noted that the locking universal wheels 18 facilitate the deflection and telescopic adjustment of the right-angled struts 17 and also provide movable support for the crane 1. The crane 1 also includes a central cavity 12, a storage slot 13, a drive worm 14, a driven worm gear 15, and an opening and closing swing arm 16.

[0057] The middle cavity 12 is opened in the middle of the main gantry 11 .

[0058] There are two storage slots 13, which are symmetrically located at the front and rear sides of the main gantry 11. Figure 4 The two opening and closing swing arms 16 in the storage state are symmetrically arranged on the front and rear sides of the main gantry 11, which not only helps to improve the balance of the main gantry 11, but also provides symmetrical support for telescopic adjustment.

[0059] The driving worm 14 is rotatably mounted in the middle cavity 12 . A first motor is provided in the middle cavity 12 for driving the driving worm 14 to rotate, so that the driving worm 14 drives the two opening and closing swing arms 16 to perform deflection motion during bidirectional rotation.

[0060] There are two driven worm gears 15, which are rotatably mounted in the two receiving slots 13, and are both meshed with the driving worm 14. Under the driving action of the driving worm 14, one of the two driven worm gears 15 deflects in a clockwise direction, while the other deflects in a counterclockwise direction.

[0061] The opening and closing swing arm 16 is integrally connected to the driven worm gear 15, and the right-angle opening and closing strut 17 is slidably mounted in the opening and closing swing arm 16. It should be noted that a driving cylinder for driving the right-angle opening and closing strut 17 to extend and retract horizontally is provided in the opening and closing swing arm 16, so that the opening and closing swing arm 16 can synchronously adjust the extension and retraction of the right-angle opening and closing strut 17 during the opening and closing process, especially when the right-angle opening and closing strut 17 is in the retracted state so that the right-angle opening and closing strut 17 is in contact with the outer wall of the main gantry 11. The right-angle opening and closing strut 17 can be flexibly adjusted to adjust the size of the traveling crane 1, and the right-angle opening and closing strut 17 can also be used to provide symmetrical front-to-back and left-to-right support for the moving traveling crane 1.

[0062] The hoist 2 includes a load plate 21, on which a fixing fixture 27 is movably provided for clamping and supporting the box from the front, back, left and right. The hoist 2 also includes a double-ended rocker 22, a guide slot 23, a transmission slider 24, a guide wedge 26, and a synchronous sleeve 28.

[0063] The double-headed swing rod 22 is rotationally installed on the load-carrying flat plate 21. A second motor for driving the double-headed swing rod 22 to deflect bidirectionally is provided on the load-carrying flat plate 21, so as to control the two transmission sliders 24 to move towards or away from each other.

[0064] The guiding long holes 23 are opened in the load-carrying flat plate 21 and are distributed in the left-right direction.

[0065] The transmission sliders 24 are slidably sleeved in the guiding long holes 23 by being actively pulled by the double-headed swing rod 22. A first connecting rod 25 is pin-connected between the end of the double-headed swing rod 22 and the transmission slider 24. During the deflection process of the double-headed swing rod 22, the two transmission sliders 24 are pulled to approach each other or move away from each other in the opposite direction;

[0066] The guiding wedge 26 is integrally connected to the load-carrying flat plate 21, and the fixed clamp 27 is slidably sleeved in the guiding wedge 26. Specifically, refer to the attached Figure 5 - attached Figure 7 and attached Figure 9 , the guiding wedge 26 is a right-angled triangular block with an opening in the middle, and the position closer to the middle line of the load-carrying flat plate 21 is higher. The fixed clamp 27 slidably sleeved in the guiding wedge 26 is lifted by the guiding wedge 26 while being pulled by the synchronous sleeve 28, so as to perform inclined telescopic lifting and lowering movement to symmetrically clamp and limit the square box.

[0067] The synchronous sleeve 28 is actively pulled by the transmission slider 24 and is slidably sleeved on the fixed clamp 27. A second connecting rod 29 is pin-connected between the synchronous sleeve 28 and the transmission slider 24. It should be noted that the cross-section of the fixed clamp 27 is a U-shaped structure, and its bottom end is provided with a slope structure to facilitate entering from the bottom end of the square box and jacking up and lifting the square box.

[0068] The right-angled load-bearing bracket 3 is fixedly arranged on the traveling crane 1. The right-angled load-bearing bracket 3 is integrally connected to the main gantry 11. The middle of the right-angled load-bearing bracket 3 is open to facilitate the arrangement of the pulley and roller structures in the first traction mechanism 4 and the second traction mechanism 5.

[0069] The first traction mechanism 4 is arranged on the traveling crane 1 through the right-angled load-bearing bracket 3, and the first traction mechanism 4 is used for labor-saving vertical lifting of the hoisting device 2. The first traction mechanism 4 includes a lifting movable pulley 43, and a first traction roller 42 is arranged on the right-angled load-bearing bracket 3. A first traction rope 44 for labor-saving vertical lifting of the hoisting device 2 is connected between the lifting movable pulley 43 and the first traction roller 42. The first traction mechanism 4 further includes a first fixed pulley 41:

[0070] Specifically, refer to the attached Figure 1 、attached Figure 2 、attached Figure 7 、attached Figure 8The first fixed pulley 41 is fixedly installed on the main gantry 11, and the first traction rope 44 passes through the first fixed pulley 41, the lifting pulley 43 and the first traction roller 42 in sequence from the lifting pulley 43. When the friction resistance is ignored, the first traction roller 42 applies a pulling force of about half of the total weight of the lifting pulley 43, the hoist 2, the balance maintaining mechanism 6 and the box through the first traction rope 44, so as to facilitate the labor-saving traction of the box.

[0071] Please refer to the instruction manual for details Figure 1 , Attachment Figure 2 , Attachment Figure 7 , Attachment Figure 8 The second traction mechanism 5 is arranged on the traveling crane 1 through the right-angle load-bearing bracket 3, and the second traction mechanism 5 is used for labor-saving traction of the first traction mechanism 4. The second traction mechanism 5 includes a movable pulley 57 movably arranged on the right-angle load-bearing bracket 3, and the main gantry 11 is provided with a second traction roller 59. A second traction rope 510 for labor-saving traction of the first traction roller 42 is connected between the movable pulley 57 and the second traction roller 59. The second traction mechanism 5 also includes a damping shaft 51, a driving gear 52, a driven gear 53, a Y-shaped rocker 54, an elastic limiter 55, an opening and closing rocker 56, and a second fixed pulley 58:

[0072] The damping shaft 51 is rotatably mounted on the right-angle load-bearing bracket 3 , and the driving gear 52 is key-connected to the damping shaft 51 .

[0073] The driven gear 53 is key-connected to the first traction roller 42, and the driven gear 53 is meshed with the driving gear 52. It should be noted that the driving gear 52 and the driven gear 53 adopt the principle of differential, and the transmission ratio (i) is used to achieve the labor-saving effect, which is as follows: i = driven gear 53 speed / driving gear 52 speed = number of teeth of driving gear 52 / number of teeth of driven gear 53

[0074] Among them, changing the size of i can achieve the effect of saving effort or speeding up:

[0075] Transmission ratio conditions logic Effect suggestion i＞1 Speed ​​is reduced and torque is increased (sacrificing speed for torque) Save effort 1<i≤5 i＜1 As the speed increases, the torque decreases (sacrificing torque for speed) accelerate 0.2≤i<1

[0076] The Y-shaped rocker arm 54 is fixedly connected to the damping shaft 51 . The deflection of the Y-shaped rocker arm 54 causes the damping shaft 51 to deflect, and the driving gear 52 then drives the driven gear 53 to rotate.

[0077] The elastic limiting member 55 is movably mounted on the right-angle load-bearing bracket 3, and the elastic limiting member 55 is movably connected to the Y-shaped swing arm 54. The elastic limiting member 55 is utilized to elastically pull the Y-shaped swing arm 54 so that the Y-shaped swing arm 54 resets itself.

[0078] The opening and closing swing rod 56 is pin-connected to the Y-shaped swing rod 54, and the movable pulley 57 is fixedly mounted on the opening and closing swing rod 56;

[0079] The second fixed pulley 58 is fixedly installed on the right-angle load-bearing bracket 3, and the second traction rope 510 passes through the second fixed pulley 58 and the movable pulley 57 to the second traction roller 59 in sequence from the movable pulley 57. Ignoring the friction resistance, the second traction roller 59 can apply a pulling force of about half of the sum of the elastic force of the elastic limiter 55 and the gravity of the movable pulley 57 through the second traction rope 510, so as to achieve a labor-saving effect.

[0080] The balance maintaining mechanism 6 is arranged between the hoist 2 and the first traction mechanism 4, and the balance maintaining mechanism 6 is used to adjust and maintain the hoist 2 to a balanced state with the first traction mechanism 4 as the fulcrum. The balance maintaining mechanism 6 includes four sets of leveling fixtures 63 for pulling the load plate 21 to a horizontal state, and two sets of locking fixtures 64 for fixing the load plate 21 in a horizontal state are arranged between the lifting pulley 43 and the load plate 21. The balance maintaining mechanism 6 also includes a level detector 61 and a controller 62:

[0081] The level detector 61 is fixedly installed on the load plate 21, the controller 62 is fixedly installed on the load plate 21, and the controller 62 is electrically connected to the level detector 61. The level detector 61 is used to monitor the levelness of the load plate 21. When it is found that the load plate 21 is tilted, the four sets of leveling tooling 63 are controlled to operate through the controller 62.

[0082] The leveling tool 63 includes a drive motor 631, a drive flywheel 632, a reciprocating chain 633, an anti-drop hook cable 634, and a load pull ring 635:

[0083] The driving motor 631 is fixedly mounted on the lifting movable pulley 43 .

[0084] The driving flywheel 632 is rotatably mounted on the lifting movable pulley 43, and the driving flywheel 632 is fixedly connected to the output end of the driving motor 631. Notches are provided at the four corner positions of the lifting movable pulley 43 to facilitate the internal installation of the driving flywheel 632 and the reciprocating chain 633. By driving the driving flywheel 632 to rotate, the reciprocating chain 633 used to pull the anti-hook head rope 634 can be telescopically adjusted.

[0085] The reciprocating chain 633 is slidably mounted on the lifting movable pulley 43 , and the reciprocating chain 633 is meshedly connected with the driving flywheel 632 .

[0086] The anti-detachment hook head cable 634 is fixedly connected to the reciprocating chain 633. It should be noted that under the unified control of the controller 62, the anti-detachment hook head cable 634 in the four sets of leveling tooling 63 are adjusted to different degrees of telescopic adjustment, and the load plate 21 is pulled to a horizontal state through the load pull ring 635.

[0087] The load-carrying pull ring 635 is fixedly mounted on the load-carrying plate 21 , and the load-carrying pull ring 635 is assembled and connected with the anti-drop hook head cable 634 .

[0088] The locking tool 64 includes a funnel sleeve 641, a plastic tensioning plate assembly 642, a spiral booster head 643, and a lifting rod 644:

[0089] The funnel sleeve 641 is integrally connected to the load plate 21 .

[0090] The plastic tensioning plate group 642 is integrally connected to the funnel sleeve 641. A stress-bearing section 645 is provided on the outer wall of the upper end of the plastic tensioning plate group 642. The plastic tensioning plate group 642 is composed of 4-6 tough steel plates. It opens radially in the initial state without pressure from the spiral booster head 643. At this time, the lifting rod 644 moves through the funnel sleeve 641 through the plastic tensioning plate group 642.

[0091] A spiral booster head 643 is threadedly mounted on the funnel sleeve 641. A booster section 646 is defined on the inner wall of the lower end of the spiral booster head 643, which flexibly opposes the force-bearing section 645. The spiral booster head 643 is threadedly connected to the funnel sleeve 641. By driving the spiral booster head 643 downward, pressure is applied to the plastically tensioned plate assembly 642, forcing the four to six ductile steel plates to close vertically. This locks the lifting rod 644, which is mounted within the funnel sleeve 641, and secures the lifting pulley 43 to the load platform 21.

[0092] The hoisting rod 644 is integrally connected to the lifting pulley 43 , and the hoisting rod 644 passes through the spiral booster head 643 and the plastic tensioning plate group 642 in sequence and penetrates the funnel sleeve 641 .

[0093] The lifting movable pulley 43 is located just above the load plate 21 . The lifting movable pulley 43 applies traction to pull the load plate 21 , so that the load plate 21 is lifted and lowered synchronously with the lifting movable pulley 43 .

[0094] The elastic limiting member 55 includes a guide screw 551, a telescopic threaded sleeve 552, and a cross elastic telescopic rod 553:

[0095] The guide screw 551 is pin-mounted on the right-angle load-bearing bracket 3;

[0096] The telescopic threaded sleeve 552 is matched with the guide screw 551. It should be noted that by adjusting the connection length between the guide screw 551 and the telescopic threaded sleeve 552, the length of the cross elastic telescopic rod 553 that is movably sleeved in the telescopic threaded sleeve 552 can be adjusted, which also helps to adjust the elastic coefficient of the elastic limiter 55 in real time.

[0097] One end of the cross elastic telescopic rod 553 is slidably sleeved in the telescopic threaded sleeve 552, and the other end of the cross elastic telescopic rod 553 is pin-connected to the Y-shaped rocker 54. Under the traction of the cross elastic telescopic rod 553, the Y-shaped rocker 54 tends to deflect horizontally.

[0098] Please refer to the instruction manual for details Figure 9 With attached Figure 10 The four sets of leveling fixtures 63 are distributed radially, and the two sets of locking fixtures 64 are symmetrically distributed on the left and right. When the lifting pulley 43 and the load plate 21 are in a flexibly connected state, the four sets of leveling fixtures 63 are driven to perform independent telescopic adjustment until the load plate 21 is in a horizontal state. Then, the load plate 21 in a horizontal state is fixed to make a rigid connection between the lifting pulley 43 and the load plate 21 to maintain the stability of the load plate 21 in lifting the square box.

[0099] It should be noted that the specific models and specifications of the first motor, the second motor, the drive motor 631, the drive cylinder, the level detector 61 and the controller 62 need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated.

[0100] The present invention can be explained through the following operation mode:

[0101] First, the box is fixed by the fixing clamp 27, which drives the double-ended rocker 22 to deflect, and the transmission slider 24 is pressed by the first connecting rod 25. The transmission slider 24 then pulls the synchronous sleeve 28 through the second connecting rod 29, so that the two fixing clamps 27 on the same side move toward each other along the guide wedge 26. Because of the pressure exerted by the guide wedge 26, the fixing clamps 27 move upward and tilt to clamp the box.

[0102] Secondly, the second traction roller 59 is controlled to rotate so that the first traction roller 42 rotates, and the box is lifted to a height of 0.5m from the ground. That is, the second traction roller 59 pulls the movable pulley 57 through the second traction rope 510, so that the opening and closing swing rod 56 tends to deflect toward the Y-shaped swing rod 54. At the same time, the Y-shaped swing rod 54 drives the damping shaft 51 to deflect, causing the elastic limiter 55 to be compressed, wherein the cross elastic telescopic rod 553 contracts into the telescopic threaded sleeve 552. The damping shaft 51 drives the first traction roller 42 to rotate through the driving gear 52 and the driven gear 53 to pull the first traction rope 44, thereby causing the lifting pulley 43 to rise and fall vertically.

[0103] Then, the load plate 21 is adjusted to a horizontal state through the leveling tool 63, and the horizontal state is fixed by the locking tool 64, that is, the level detector 61 monitors in real time whether the load plate 21 is in a horizontal state. If not, the four sets of leveling tool 63 are controlled to operate through the controller 62, that is, the drive motor 631 is controlled to start and drive the drive flywheel 632 to rotate, so as to drive the reciprocating chain 633 to retract and retract, thereby adjusting the anti-disengagement hook head cable 634 to retract and retract until the load plate 21 is horizontal, that is, to ensure that the square box is level;

[0104] Then, the second traction roller 59 is controlled to rotate so as to rotate the first traction roller 42, and the box is lifted and lowered by the hoist 2, and the height position of the box is further adjusted as described above;

[0105] Finally, the two right-angled opening and closing pillars 17 are controlled to expand along the front-to-back direction to assist the main gantry 11 in moving the crane 1 to adjust the displacement of the hoisted square box, that is, the worm 14 is driven to rotate, and the mountain opening and closing swing arm 16 is driven to rotate through the driven worm gear 15. The opening and closing swing arm 16 drives the right-angled opening and closing pillars 17 to deflect synchronously. At the same time, the right-angled opening and closing pillars 17 are contracted along the opening and closing swing arm 16 to form a secondary gantry perpendicular to the main gantry 11. The crane 1 is moved by locking the universal wheel 18 to adjust the displacement of the square box.

[0106] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A large-tonnage container lifting crane, comprising a crane (1) and a hoist (2) for lifting a square container, characterized in that: The crane (1) is provided with: A right-angle load-bearing bracket (3), wherein the right-angle load-bearing bracket (3) is fixedly arranged on the traveling vehicle (1); A first traction mechanism (4), the first traction mechanism (4) is arranged on the traveling crane (1) through a right-angle load-bearing bracket (3), and the first traction mechanism (4) is used for vertically lifting and lowering the labor-saving traction hoist (2); A second traction mechanism (5), the second traction mechanism (5) is arranged on the traveling vehicle (1) through a right-angle load-bearing bracket (3), and the second traction mechanism (5) is used for labor-saving traction of the first traction mechanism (4) for operation; A balance maintaining mechanism (6) is provided between the hoist (2) and the first traction mechanism (4), and the balance maintaining mechanism (6) is used to adjust and maintain the hoist (2) to a balanced state with the first traction mechanism (4) as a fulcrum.

2. A large-tonnage container hoisting crane according to claim 1, characterized in that: The traveling crane (1) comprises a main gantry (11) extending in a left-right direction, and two right-angled opening and closing pillars (17) extending in a front-back direction to form a secondary gantry are movably provided on the main gantry (11), and the lower ends of the main gantry (11) and the right-angled opening and closing pillars (17) are both provided with locking universal wheels (18).

3. The large-tonnage container hoisting crane according to claim 2, characterized in that: The hoist (2) includes a load-bearing plate (21), and a fixing fixture (27) is movably provided in the load-bearing plate (21) for clamping and supporting the square box from the front and back, left and right, and upward.

4. A large-tonnage container hoisting crane according to claim 3, characterized in that: The right-angle load-bearing bracket (3) is integrally connected to the main gantry (11).

5. The large-tonnage container hoisting crane according to claim 4, characterized in that: The first traction mechanism (4) includes a lifting movable pulley (43), and a first traction roller (42) is provided on the right-angle load-bearing bracket (3). A first traction rope (44) for vertically lifting the lifting device (2) in a labor-saving traction manner is connected between the lifting movable pulley (43) and the first traction roller (42).

6. The large-tonnage container hoisting crane according to claim 5, characterized in that: The lifting movable pulley (43) is located directly above the load-bearing plate (21).

7. A large-tonnage container hoisting crane and hoisting method thereof according to claim 6, characterized in that: The second traction mechanism (5) comprises a movable pulley (57) movably arranged on a right-angle load-bearing bracket (3); the main gantry (11) is provided with a second traction roller (59); a second traction rope (510) for labor-saving traction of the first traction roller (42) in rotation is connected between the movable pulley (57) and the second traction roller (59).

8. The large-tonnage container hoisting crane according to claim 7, characterized in that: The balance maintaining mechanism (6) includes four sets of leveling fixtures (63) for pulling the load plate (21) to a horizontal state, and two sets of locking fixtures (64) for fixing the load plate (21) in a horizontal state are provided between the lifting pulley (43) and the load plate (21).

9. The large-tonnage container hoisting crane according to claim 1, characterized in that: The four groups of leveling fixtures (63) are radially distributed, and the two groups of locking fixtures (64) are symmetrically distributed left and right.

10. A hoisting method using the large-tonnage container hoisting crane according to claim 9, characterized in that: The hoisting method comprises the following steps: Step S1, fixing the square box by the fixing fixture (27); Step S2, controlling the second traction roller (59) to rotate so that the first traction roller (42) rotates, and the box is lifted to a height of 0.5 m from the ground; Step S3, adjusting the load plate (21) to a horizontal state by means of the leveling tool (63), and then fixing the horizontal state by means of the locking tool (64); Step S4, controlling the second traction roller (59) to rotate so as to rotate the first traction roller (42), and lifting and adjusting the square box by the hoist (2); Step S5, controlling the two right-angled opening and closing pillars (17) to unfold along the front-back direction, assisting the main gantry (11) to move the crane (1) to adjust the displacement of the hoisted box.

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