Anti-winding hoisting device with active limiting function

Abstract

The utility model relates to the technical field of lifting appliances, in particular to an anti-winding lifting device with an active limiting function, and aims to solve the technical problems that in the prior art, a sling is easy to wind when rotating, and a lifting hook is easy to collide and interfere when unloading, the anti-winding lifting device specifically comprises a horizontally arranged cross-shaped beam body, and lifting rings are downwards arranged at four corners of the cross-shaped beam body; hooks are correspondingly arranged below the hanging rings, slings are arranged between the hanging rings and the hooks, the two ends of the slings are connected to the corresponding hanging rings and the corresponding hooks respectively, and limiting mechanisms matched with the slings are arranged below the cross-shaped beam body in parallel. The four slings are fixed to the four corners of the cross-shaped beam body respectively, the limiting mechanism capable of being opened and closed actively is arranged below the cross-shaped beam body, the winding phenomenon between the slings during no-load rotation is avoided, the risk that hooks collide or interfere with one another is reduced, and the unloading efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tools, in particular to an anti - winding lifting device with active limit. Background Technique

[0002] In the field of lifting technology, as an indispensable component of hoisting machinery, the performance of lifting tools is directly related to operation efficiency and safety. Traditionally, for the loading and unloading of ton bags, a four - wire lifting tool structure is widely used. This structure mainly consists of a lifting ring connected to the crane hook and four hooks that can automatically unhook. Each hook is independently connected to the lifting ring through a sling. Although such a design can basically meet the lifting requirements during operation, its inherent defects cannot be ignored.

[0003] Specifically, due to the lack of limit between the four slings, during the no - load slewing process, each sling is prone to interference and entanglement due to the lack of restraint. At the same time, the upper ends of the four slings are all fixed on the same lifting ring. During the unloading process, as the goods are gradually released, when the hooks automatically unhook, due to the lack of sufficient space separation, they tend to gather towards the center, which not only limits the smoothness of unhooking but also increases the risk of collision or interference between the hooks, directly affecting the unloading efficiency. In addition, the entangled slings need to be manually untied by workers before reuse, which not only increases the labor intensity of workers but also significantly prolongs the operation preparation time, posing an unnecessary obstacle to the overall operation process. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an anti - winding lifting device with active limit in view of the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An anti - winding lifting device with active limit, characterized in that: it includes a horizontally arranged cross beam body. Suspension rings are provided downward at the four corners of the cross beam body. Hooks are correspondingly provided below the suspension rings. A sling is provided between each suspension ring and the hook, and the two ends of the sling are respectively connected to the corresponding suspension ring and the hook. A limit mechanism cooperating with the sling is provided in parallel below the cross beam body;

[0007] The middle part of the cross beam body is set as a cross part. A lifting lug for connecting the crane hook is provided upward at the cross part, and a suspension rod for connecting the limit mechanism is provided downward at the cross part,

[0008] The limiting mechanism includes a box body fixedly connected to the lower end of the suspension rod. A positioning cylinder is provided between the box body and each suspension cable. The inner end of the positioning cylinder is fixedly connected to the box body, and the outer end of the positioning cylinder faces its corresponding suspension cable. An activity cylinder is coaxially and slidably arranged inside the positioning cylinder. A limiting sleeve is fixedly arranged at one end of the activity cylinder close to the suspension cable. Two traction rollers are arranged in parallel inside the limiting sleeve, and a limiting space for the suspension cable to penetrate is provided between the two traction rollers;

[0009] A driving mechanism is arranged inside the box body. The driving mechanism is used to drive all the activity cylinders to synchronously expand and contract inside the positioning cylinders, so as to synchronously pull close or push away all the suspension cables.

[0010] The technical problem to be solved by the present utility model can be further realized through the following steps. The driving mechanism includes a transmission main shaft vertically arranged in the middle of the box body. A driving bevel gear is installed on the transmission main shaft. A plurality of transmission secondary shafts corresponding to each positioning cylinder coaxially are arranged on the circumferential side of the transmission main shaft. A driven bevel gear matched with the driving bevel gear is installed at the inner end of the transmission secondary shaft. The outer end of the transmission secondary shaft passes through a first through hole correspondingly opened on the side wall of the box body and extends into its corresponding positioning cylinder. A transmission mechanism matched with the transmission secondary shaft is arranged inside the positioning cylinder.

[0011] The technical problem to be solved by the present utility model can be further realized through the following steps. The transmission mechanism is a lead screw-nut mechanism. The lead screw of the lead screw-nut mechanism is coaxially installed inside the positioning cylinder. The inner end of the lead screw is connected to the transmission secondary shaft through a coupling. The nut of the lead screw-nut mechanism is fixedly connected to the inner wall of the activity cylinder.

[0012] The technical problem to be solved by the present utility model can be further realized through the following steps. A sliding groove is opened on the inner wall of the positioning cylinder. A sliding block matched with the sliding groove is arranged on the outer wall of the activity cylinder. A retaining ring for stopping the nut is fixedly sleeved at the inner end of the lead screw.

[0013] The technical problem to be solved by the present utility model can be further realized through the following steps. The lower end of the transmission main shaft passes through a second through hole correspondingly arranged on the bottom wall of the box body and extends out. A hand wheel is fixedly installed at the extending end. A locking disc matched with the hand wheel is fixedly arranged between the hand wheel and the box body. A first locking hole is arranged on the hand wheel. A plurality of second locking holes are evenly distributed along the circumferential direction on the locking disc. The first locking hole can be locked with the second locking holes through a cylindrical locking piece to limit the rotation of the transmission main shaft.

[0014] The technical problem to be solved by the present utility model can be further realized through the following steps. A lifting mechanism is arranged between the cross beam body and the box body. The suspension rod is fixedly connected to the output end of the lifting mechanism as a whole.

[0015] The technical problem to be solved by the present utility model can also be further realized through the following steps. The lifting mechanism is a hydraulic cylinder.

[0016] The technical problem to be solved by the present utility model can also be further realized through the following steps. A reinforcing rib is provided between the lifting lugs and the cross beam body, and a reinforcing rod is fixedly provided between adjacent positioning cylinders.

[0017] The technical problem to be solved by the present utility model can also be further realized through the following steps. The hook is an automatic decoupling type hook. The hook includes a hook frame. A rotating shaft is horizontally provided at the bottom of the hook frame. A short rod is sleeved on the rotating shaft. A hook body is integrally connected to the bottom of the short rod. A long rod is integrally connected to the top of the short rod. A counterweight block is fixedly provided at the top of the long rod.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: By respectively fixing the four suspension ropes at the four corners of the cross beam body and arranging a limiting mechanism that can actively open and close below the cross beam body, not only is a constraint provided for the suspension ropes, avoiding the entanglement phenomenon between the suspension ropes during no-load rotation, reducing the labor intensity of workers and the operation preparation time, but also sufficient space separation can be obtained when the hooks are automatically decoupled, avoiding the risk of mutual collision or interference between the hooks, and significantly improving the unloading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a front view schematic diagram of the present utility model;

[0020] Figure 2 is a top view schematic diagram of the present utility model;

[0021] Figure 3 is Figure 1 a sectional view taken along the A direction in (the suspension ropes are omitted in the figure);

[0022] Figure 4 is Figure 3 a sectional view taken along the B direction in ;

[0023] Figure 5 is a top view schematic diagram of the handwheel and the locking disc of the present utility model;

[0024] Figure 6 is a schematic diagram of the hook of the present utility model;

[0025] In the figure: 1 - cross beam body; 2 - lifting ring; 3 - hook; 4 - suspension cable; 5 - lifting lug; 6 - suspension rod; 7 - box body; 8 - positioning cylinder; 9 - movable cylinder; 10 - limit sleeve; 11 - traction roller; 12 - transmission main shaft; 13 - driving bevel gear; 14 - transmission auxiliary shaft; 15 - driven bevel gear; 16 - lead screw; 17 - coupling; 18 - nut; 19 - chute; 20 - slider; 21 - retaining ring; 22 - hand wheel; 23 - locking disc; 24 - first locking hole; 25 - second locking hole; 26 - hydraulic cylinder; 27 - reinforcing rib; 28 - reinforcing rod; 29 - hook frame; 30 - rotating shaft; 31 - short rod; 32 - hook body; 33 - long rod; 34 - counterweight block. Detailed implementation mode

[0026] The following further describes the specific technical solution of the present invention so that those skilled in the art can further understand the present invention without constituting a limitation to its rights.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028]

Embodiment 1

[0029] The middle part of the cross beam body 1 is set as a cross part. The cross beam body 1 is integrally connected by the cross part and four sub - beams. The four corners of the cross beam body 1 are the ends of each sub - beam. A lifting lug 5 connecting the crane hook is fixedly arranged upward at the cross part. A suspension rod 6 connecting the limit mechanism is arranged downward at the cross part.

[0030] The limiting mechanism includes a box body 7 fixedly connected to the lower end of the suspension rod 6. The box body 7 is of a cuboid structure. A positioning cylinder 8 is provided between the box body 7 and each suspension cable 4. The inner end of the positioning cylinder 8 is fixedly installed on the side wall of the box body 7 by bolts. The outer end of the positioning cylinder 8 faces its corresponding suspension cable 4. The direction of the positioning cylinder 8 is parallel to the sub-beam at the corresponding position of the cross beam body 1, and the length of the positioning cylinder 8 is not greater than the length of this sub-beam. An activity cylinder 9 is slidably arranged coaxially inside the positioning cylinder 8. A limiting sleeve 10 is fixedly arranged at one end of the activity cylinder 9 close to the suspension cable 4. Two traction rollers 11 are rotatably arranged in the limiting sleeve 10 on the same horizontal plane. A limiting space for the suspension cable 4 to penetrate is provided between the two traction rollers 11. A driving mechanism is arranged inside the box body 7. The driving mechanism is used to drive all the activity cylinders 9 to synchronously expand and contract inside the positioning cylinder 8, so as to synchronously pull closer or push away all the suspension cables 4. When the activity cylinder 9 contracts inward, it drives the limiting sleeve 10 to slide inward synchronously. At this time, all the suspension cables 4 together with the hooks 3 below are pulled towards the center of the box body 7, thus facilitating the staff to connect the goods to be installed. When the activity cylinder 9 extends outward, it drives the limiting sleeve 10 to slide outward synchronously. All the suspension cables 4 together with the hooks 3 below are pushed away from the center of the box body 7, thus preventing the suspension cables 4 from winding around each other during rotation and preventing the hooks 3 from colliding and interfering with each other during unloading.

[0031] Please refer to Figure 4 , the driving mechanism includes a transmission main shaft 12 rotatably arranged vertically in the middle of the box body 7. An active bevel gear 13 is installed on the transmission main shaft 12. A number of (four) transmission sub-shafts 14 corresponding to each positioning cylinder 8 coaxially are arranged on the periphery of the transmission main shaft 12. A driven bevel gear 15 matched with the active bevel gear 13 is fixedly installed at the inner end of the transmission sub-shaft 14. The outer end of the transmission sub-shaft 14 passes through a first through hole correspondingly opened on the side wall of the box body 7 and extends into its corresponding positioning cylinder 8. A transmission mechanism matched with the transmission sub-shaft 14 is arranged inside the positioning cylinder 8.

[0032] Please refer to Figure 4 , the above-mentioned transmission mechanism is a lead screw-nut mechanism. The lead screw of the lead screw-nut mechanism is coaxially installed inside the positioning cylinder 8. The inner end of the lead screw 16 is fixedly connected to the transmission sub-shaft 14 through a coupling 17. The nut 18 of the lead screw-nut mechanism is fixedly connected to the inner wall of the activity cylinder 9. The rotation of the transmission main shaft 12 drives the active bevel gear 13 to rotate, and then drives the transmission sub-shaft 14 and the lead screw to rotate through the driven bevel gear 15. The rotation of the lead screw drives the nut 18 to move, and then realizes the active expansion and contraction of the activity cylinder 9 in the inner and outer directions.

[0033] Please refer to Figure 4 , a chute 19 is opened on the inner wall of the positioning cylinder 8. A slider 20 matched with the chute 19 is arranged on the outer wall of the activity cylinder 9. A retaining ring 21 for stopping the nut 18 is fixedly sleeved on the inner end of the lead screw. The retaining ring 21 is used to limit the inner end stroke of the activity cylinder 9.

[0034] Please refer to Figure 5 , the lower end of the transmission main shaft 12 passes through a second through hole provided corresponding to the bottom wall of the box body 7 and extends out. A handwheel 22 is fixedly installed at the extending end. A locking disc 23 that cooperates with the handwheel 22 is fixedly provided between the handwheel 22 and the box body 7. A first locking hole 24 is provided on the handwheel 22. A plurality of second locking holes 25 are evenly distributed in the circumferential direction on the locking disc 23. The first locking hole 24 can be locked with the second locking hole 25 through a cylindrical locking member to limit the rotation of the transmission main shaft 12. It should be noted that the transmission main shaft 12 can also adopt an electric drive method, such as fixedly installing a motor at the bottom of the box body 7, and the output shaft of the motor is in transmission cooperation with the transmission main shaft 12 through a gear set.

[0035] Please refer to Figures 1-3 , to further increase the structural strength of the present invention, a reinforcing rib 27 is provided between the lifting lug 5 and the cross beam body 1, a reinforcing rod 28 is fixedly provided between adjacent positioning cylinders 8, and a reinforcing plate is provided between each sub-beam of the cross beam body 1.

[0036] Please refer to Figure 6 , the hook 3 used in the present invention is an automatic decoupling type hook 3, which specifically includes a hook frame 29. A rotating shaft 30 is horizontally provided at the bottom of the hook frame 29. A short rod 31 is sleeved on the rotating shaft 30. A hook body 32 is integrally connected to the bottom of the short rod 31. A long rod 33 is integrally connected to the top of the short rod 31. A counterweight 34 is fixedly provided at the top of the long rod 33.

[0037] Working principle: For a lifting device with active limiting and anti-winding of the present invention, during use, first, the cross beam body 1 is connected to the hook of a crane through the lifting lug 5 at its top. Subsequently, the operator rotates the handwheel 22 in the forward direction, and the transmission main shaft 12 drives the driving bevel gear 13 to rotate, thereby driving the driven bevel gear 15 meshing with it and the corresponding transmission secondary shaft 14 to rotate synchronously. The transmission secondary shaft 14 drives the screw rod in the screw nut mechanism to rotate. Due to the threaded cooperation between the screw rod and the nut 18, the nut 18 moves axially along the screw rod, thereby pushing the movable cylinder 9 to slide inward synchronously in the positioning cylinder 8, and then driving the limiting sleeve 10 and the two traction rollers 11 inside it to approach the center of the box body 7. During this process, each sling 4 is synchronously pulled closer under the guiding action of the traction rollers 11 until all the hooks 3 are pulled to near the outer end of the corresponding positioning cylinder 8, so as to facilitate the staff to quickly and accurately hook the ton bag goods onto each hook 3.

[0038] After the goods are hooked up, the operator rotates the handwheel 22 in the reverse direction. At this time, the reverse rotation of the transmission main shaft 12 and the subsequent transmission linkages causes the nut 18 in the lead screw-nut mechanism to move in the reverse direction, driving the movable cylinder 9 and the limit sleeve 10 to slide outwards, and then pushing the sling ropes 4 and the hooks 3 in opposite directions until there is enough space between them. This effectively prevents the sling ropes 4 from being entangled with each other due to the rotation or swinging of the goods during the hoisting process, and also avoids the mutual collision and interference between the hooks 3 during unloading, ensuring the safety and efficiency of the hoisting operation.

[0039] In the above steps, after adjusting the position of the movable cylinder 9, a locking member (such as a pin shaft) needs to pass through the first locking hole 24 and the second locking hole 25 to fix the position of the transmission main shaft 12 and prevent it from rotating accidentally.

[0040]

Embodiment 2

[0041] The utility model fixes the four sling ropes 4 at the four corners of the cross beam body 1 respectively, and sets a limiting mechanism that can actively open and close below the cross beam body 1. This not only provides constraints for the sling ropes 4, avoids the entanglement between the sling ropes 4 during no-load rotation, reduces the labor intensity of workers and the operation preparation time, but also enables the hooks 3 to obtain sufficient space separation during automatic unhooking, avoiding the risk of mutual collision or interference between the hooks 3, and significantly improving the unloading efficiency.

[0042] Obviously, the described embodiments are some, but not all, of the embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

Claims

1. An anti-winding hoisting device with active limit, characterized in that: It comprises a horizontally arranged cross beam body, wherein the four corners of the cross beam body are provided with lifting rings downwards, hooks are provided correspondingly below the lifting rings, a sling is provided between each lifting ring and the hook, and the two ends of the sling are respectively connected to the corresponding lifting ring and the hook, and a limiting mechanism cooperating with the sling is provided in parallel below the cross beam body; The middle part of the cross beam body is set as a cross part, the cross part is upwardly provided with a lifting lug connected to the crane hook, and the cross part is downwardly provided with a suspension rod connected to the limiting mechanism. The limiting mechanism comprises a box body fixedly connected to the lower end of the suspension rod, a positioning cylinder is arranged between the box body and each sling, the inner end of the positioning cylinder is fixedly connected to the box body, the outer end of the positioning cylinder is aligned with the corresponding sling, a movable cylinder is coaxially slidably arranged inside the positioning cylinder, a limiting sleeve is fixedly arranged at one end of the movable cylinder close to the sling, two traction rollers are arranged in parallel inside the limiting sleeve, and a limiting space is arranged between the two traction rollers for the sling to pass through; A driving mechanism is arranged in the box body, and the driving mechanism is used for driving all movable cylinders to synchronously extend and retract in the positioning cylinder, so as to synchronously pull all slings closer or push them away.

2. The anti-winding hoisting device with active limit according to claim 1 is characterized in that: The driving mechanism includes a transmission main shaft vertically arranged in the middle of the box body, a driving bevel gear is installed on the transmission main shaft, a plurality of transmission sub-shafts coaxially corresponding to each positioning cylinder are arranged on the circumferential side of the transmission main shaft, a driven bevel gear matching with the driving bevel gear is installed at the inner end of the transmission sub-shaft, the outer end of the transmission sub-shaft passes through a first through hole correspondingly opened on the side wall of the box body and extends into the corresponding positioning cylinder, and a transmission mechanism matching with the transmission sub-shaft is arranged in the positioning cylinder.

3. The anti-winding hoisting device with active limit according to claim 2 is characterized in that: The transmission mechanism is a screw-nut mechanism, the screw of which is coaxially installed in the positioning cylinder, the inner end of the screw is connected to the transmission secondary shaft through a coupling, and the nut of the screw-nut mechanism is fixedly connected to the inner wall of the movable cylinder.

4. The anti-winding hoisting device with active limit according to claim 3 is characterized in that: The inner wall of the positioning cylinder is provided with a sliding groove, the outer wall of the movable cylinder is provided with a sliding block matched with the sliding groove, and the inner end fixed sleeve of the lead screw is provided with a retaining ring for stopping the nut.

5. The anti-winding hoisting device with active limit according to claim 2 is characterized in that: The lower end of the transmission main shaft passes through a second through hole correspondingly arranged on the bottom wall of the box body and extends out, a handwheel is fixedly installed on the extended end, a locking plate matching the handwheel is fixedly arranged between the handwheel and the box body, a first locking hole is provided on the handwheel, and a plurality of second locking holes are evenly distributed on the locking plate along the circumference, the first locking hole can be locked with the second locking hole by a cylindrical locking piece to limit the rotation of the transmission main shaft.

6. The anti-winding hoisting device with active limit according to claim 1 is characterized in that: A lifting mechanism is provided between the cross beam body and the box body, and the suspension rod is fixedly connected to the output end of the lifting mechanism as a whole.

7. The anti-winding hoisting device with active limit according to claim 6 is characterized in that: The lifting mechanism is a hydraulic cylinder.

8. The anti-winding hoisting device with active limit according to claim 1 is characterized in that: Reinforcement ribs are arranged between the lifting ears and the cross beam body, and reinforcement rods are fixedly arranged between adjacent positioning tubes.

9. The anti-winding hoisting device with active limit according to claim 1 is characterized in that: The hook is an automatic unhooking type hook, comprising a hook frame, a rotating shaft is horizontally provided at the bottom of the hook frame, a short rod is sleeved on the rotating shaft, a hook body is integrally connected to the bottom of the short rod, a long rod is integrally connected to the top of the short rod, and a counterweight is fixedly provided on the top of the long rod.

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