Anti-shaking hoisting device for crane

Abstract

The invention relates to a crane structure improvement technology, and discloses an anti-shake hoisting device for a crane, which is characterized in that a hoisting rope limiting mechanism is movably mounted at one end of a pulley assembly, and the whole hoisting rope limiting mechanism is jointly formed by a U-shaped frame, a guide pipe, a damper and a clamping assembly; the characteristic that the guide pipe is connected with the damper is utilized to effectively limit the swing amplitude of the whole lifting rope limiting structure, meanwhile, through cooperation of the guide pipe and the clamping assembly, the lifting rope limiting structure is clamped and fixed through power generated when the lifting hook ascends, and therefore the situation that the lifting hook shakes due to stormy waves under the non-lifting condition is avoided, and potential safety hazards are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of crane structure improvement, in particular to an anti-sway hoisting device for a crane. Background Art

[0002] Cranes are indispensable equipment in the construction and transportation processes. In the existing crane structure, the pulley mechanism is fixedly installed on the crane boom through a pulley block. In the process of lifting goods, the crane boom is mainly used to bear the weight of the goods, and the pulley block assists the lifting rope to lift the goods. During the lifting process, the edge of the pulley will have a certain limiting effect on the lifting rope. When the goods do not shake, the lifting rope will not cause serious wear and impact on the pulley block, and the service life of the pulley block can be guaranteed.

[0003] However, the crane using the above pulley mechanism has a small lifting radius and is only suitable for lifting work in the vertical direction. When the cargo is not directly under the hook, the pulley block cannot change direction forward, backward, left, right, or right according to the position of the cargo. The staff can only continuously adjust the position of the crane boom according to the position of the cargo to meet the lifting needs. This working method seriously limits the working efficiency and application scope of the crane, especially is not conducive to offshore platform operations. In order to solve the above technical problems, the technical personnel in this field proposed a patent for an anti-sway hoisting device for cranes, and its publication number is: CN111170181A; the patent installs a fixed shaft on the crane boom, one end of the pulley assembly is sleeved on the fixed shaft, one end of the pulley assembly is matched with the fixed shaft, and the pulley assembly rotates relative to the fixed shaft; the other end of the pulley assembly is movably installed with a rope limiting mechanism through the rotating shaft, and the rope limiting mechanism rotates around the rotating shaft; the center line of the fixed shaft is perpendicular to the center line of the rotating shaft. The beneficial effect of the present invention is that it expands the lifting range of the crane, and at the same time reduces the wear and impact of the rope on the pulley block, and prolongs the service life.

[0004] However, although the above patent uses a rope limiting mechanism to solve the problem of wear on the pulley block caused by the swing of the rope, its technical solution does not consider the restriction of the swing of the hook. It should be noted that when the crane is not hoisted, the crane hook is prone to large-angle and high-frequency swing due to external factors such as wind and waves. This situation not only increases the wear of the connection between the hook and the rope, but also poses a safety hazard of the hook falling from a high altitude. Therefore, those skilled in the art need a crane hoisting mechanism that can better limit the swing amplitude and frequency of the hook when it is not hoisted. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and to design an anti-sway hoisting device for a crane.

[0006] The technical solution of the present invention to achieve the above-mentioned purpose is a sway-proof lifting device for a crane, comprising a crane boom, the crane boom is equipped with a rope system and a pulley assembly, the rope system comprises a rope and a hook connected to one end of the rope, a fixed shaft is installed on the crane boom, one end of the pulley assembly is sleeved on the fixed shaft, and a rope limiting mechanism is movably installed on the other end of the pulley assembly through a rotating shaft, the rope passes through the pulley assembly and the rope limiting mechanism, the rope limiting mechanism can limit the swing amplitude of the rope, and the rope limiting mechanism can also clamp and fix the hook when the rope is reeled.

[0007] The lifting rope limiting mechanism includes a U-shaped frame, a guide tube and a damper. The upper end of the U-shaped frame is movably connected to the two ends of the rotating shaft respectively. Two wire pressing wheels are installed in the U-shaped frame. A wire passing hole is provided on the lower end surface of the U-shaped frame. The upper end of the guide tube is detachably connected to the lower surface of the U-shaped frame. A plurality of wire pressing wheels are provided in the guide tube. A clamping assembly is installed at the lower port of the guide tube. An outer edge is provided on the outer side surface of the guide tube. The outer edge is movably connected to one end of the damper, and the other end of the damper is movably connected to the crane boom.

[0008] The clamping assembly includes an annular member and a plurality of hook claws, the upper ends of the hook claws are movably connected to the edge of the lower port of the guide tube, the hook claws can perform a clamping action around the lower port of the guide tube, the annular member is located directly below the guide tube, the lifting rope passes through the inner hole of the annular member, the hook can push the annular member to rise, a plurality of springs are arranged on the outer edge of the annular member, and the plurality of springs and the plurality of hook claws are in a one-to-one correspondence, one end of the spring is movably connected to the outer edge of the annular member, and the other end of the spring is movably connected to the side surface of the hook claw, and the annular member can drive the plurality of hook claws to clamp the hook during the rising process.

[0009] The length value of the spring matches the position and travel distance value of the ring.

[0010] The position of the annular member is lower than the position of the other end of the spring, and the plurality of hook claws clamp and fix the hook by first opening outwards and then clamping inwards during the rising process of the annular member; Alternatively, the position of the annular member is higher than the position of the other end of the spring, and the plurality of hook claws clamp and fix the hook by means of an inward clamping action during the rising process of the annular member.

[0011] The hook claw is an "L"-shaped structure formed by bending a rod, and the outer surface of the hook claw is wrapped with an elastic material to ensure that the coating on the surface of the hook is not damaged when the hook claw clamps the hook.

[0012] The hook comprises two parts, a counterweight body and a hook. The lower surface of the counterweight body is fixedly connected to the upper end of the hook, and the upper end of the counterweight body is connected to the lifting rope.

[0013] The counterweight body is a columnar structure.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a structure of active connection between the lifting rope limiting mechanism and the pulley block to realize the rotation of the lifting rope limiting mechanism around the rotating shaft in the front-rear direction of the pulley block, thereby realizing the technical effect of the lifting angle of the lifting rope and the hook being adjustable in the front-rear direction. The staff does not need to constantly adjust the position of the crane boom according to the position of the cargo, thus saving working time and improving working efficiency. 2. The present invention utilizes a lifting rope limiting mechanism and cooperates with the lifting hook's rising action to clamp and fix the lifting hook in a non-lifting state, thereby preventing the lifting hook from swaying due to wind and waves in a non-lifting state, and further improving the safety of the staff; 3. The technical solution proposed in the present invention application has a simple structure and does not require changing the structural layout of the existing crane. It only requires improving the rope limiting mechanism on the structure of the existing crane. The modification is very convenient and low in cost, and is suitable for rapid promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an anti-sway hoisting device for a crane according to the present invention when the hook is not raised; Figure 2 It is a structural schematic diagram of an anti-sway hoisting device for a crane according to the present invention when the hook is raised; Figure 3 It is a structural schematic diagram of the connection between the suspension rope limiting mechanism and the pulley assembly of the present invention; Figure 4 It is a schematic diagram of the exploded structure of the rope limiting mechanism of the existing anti-sway hoisting device in the background technology of the present invention; Figure 5 It is a schematic diagram of the structure of a pulley assembly of an existing anti-sway hoisting device in the background technology of the present invention; Figure 6 It is a schematic diagram of the hook structure of the existing anti-sway lifting device in the background technology of the present invention; In the figure: 1. crane boom; 2. spring; 3. pulley assembly; 4. rotating shaft; 5. rope limiting mechanism; 6. fixed shaft; 7. U-shaped frame; 8. wire pressing wheel; 9. wire passing hole; 10. rope; 11. hook; 12. guide tube; 13. damper; 14. outer edge; 15. ring; 16. hook claw. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below with reference to the accompanying drawings: Embodiment 1: An anti-sway hoisting device for a crane, such as Figure 1-Figure 6 As shown, it includes a crane boom 1, the crane boom 1 is equipped with a suspension rope system, the suspension rope system includes a suspension rope 10 and a hook 11 connected to one end of the suspension rope 10, and also includes a pulley assembly 3, the suspension rope 10 passes through the pulley assembly 3, a fixed shaft 6 is installed on the crane boom 1, one end of the pulley assembly 3 is sleeved on the fixed shaft 6, one end of the pulley assembly 3 is matched with the fixed shaft 6, the pulley assembly 3 rotates left and right relative to the fixed shaft 6, the other end of the pulley assembly 3 is movably installed with a suspension rope limiting mechanism 5 through a rotating shaft 4, the suspension rope limiting mechanism 5 swings up and down around the rotating shaft 4, and the center line of the fixed shaft 6 is perpendicular to the center line of the rotating shaft 4; The rope limiting mechanism 5 can limit the swing amplitude of the rope 10 around the rotating shaft 4 or around the fixed shaft 6 , and the rope limiting mechanism 5 can also clamp and fix the hook 11 when the rope 10 is rolled up.

[0017] The rope limiting mechanism 5 includes a U-shaped frame 7, a guide tube 12 and a damper 13. The upper ends of the U-shaped frame 7 are movably connected to the two ends of the rotating shaft 4 respectively, and the U-shaped frame 7 can swing around the rotating shaft 4. Two wire pressing wheels 8 are installed in the U-shaped frame 7. A wire passing hole 9 is provided on the lower end surface of the U-shaped frame 7. The two wire pressing wheels 8 are located on both sides of the wire passing hole 9. The guide tube 12 is a round tube with openings at both ends. The upper end of the guide tube 12 is detachably connected to the lower surface of the U-shaped frame 7. A plurality of wire pressing wheels 8 are provided in the guide tube 12. The wire pressing wheel 8 is arranged on the inner surface of the guide tube 12 around the center line of the guide tube 12, and a clamping assembly is installed at the lower end of the guide tube 12. An outer edge 14 is provided on the outer surface of the guide tube 12, and the outer edge 14 is movably connected to one end of the damper 13, and the other end of the damper 13 is movably connected to the crane boom 1. The damper 13 can swing up and down and left and right on the crane boom 1, and the damper 13 can prevent the guide tube 12 from swinging around the fixed axis 6 or around the rotating axis 4.

[0018] The clamping assembly includes an annular member 15 and a plurality of hooks 16, wherein the plurality of hooks 16 are arranged along the lower port of the guide tube 12, and the upper ends of the hooks 16 are movably connected to the edge of the lower port of the guide tube 12, and the hooks 16 can swing around their upper ends toward the center line of the guide tube 12 to implement a clamping action, the annular member 15 is located directly below the guide tube 12, and the position of the annular member 15 matches the positions of the plurality of hooks 16, the axial center line of the annular member 15 coincides with the axial center line of the guide tube 12, the position and size of the inner hole of the annular member 15 match the position and size of the sling 10, and the sling 1 0 can pass through the inner hole of the ring member 15, the hook 11 cannot pass through the inner hole of the ring member 15, the hook 11 is blocked by the ring member 15 during the rising process and pushes the ring member 15 to perform the rising action, a plurality of springs 2 are arranged on the outer edge of the ring member 15, and the plurality of springs 2 and the plurality of hook claws 16 are in a one-to-one correspondence, one end of the spring 2 is movably connected to the outer edge of the ring member 15, and the other end of the spring 2 is movably connected to the side surface of the hook claw 16, and the ring member 15 can drive the plurality of hook claws 16 to clamp the hook 11 and prevent the hook 11 from swinging during the rising process.

[0019] The length of the spring 2 matches the position and travel distance of the ring 15 , and ensures that the spring 2 can drive the hook 16 to perform a clamping action during the rising process of the ring 15 .

[0020] The position of the annular member 15 is lower than the position of the other end of the spring 2 , and the plurality of hook claws 16 clamp and fix the hook 11 by first opening outwards and then clamping inwards during the rising process of the annular member 15 .

[0021] The hook claw 16 is an "L"-shaped structure formed by bending a rod, and the outer surface of the hook claw 16 is wrapped with an elastic material to ensure that the hook claw 16 will not damage the coating on the surface of the hook 11 when clamping the hook 11. The elastic material includes but is not limited to rubber material and resin material.

[0022] The hook 11 includes two parts: a counterweight body and a hook. The lower surface of the counterweight body is fixedly connected to the upper end of the hook, and the upper end of the counterweight body is connected to the lifting rope 10.

[0023] The counterweight body is a columnar structure, and the cross-sectional shape of the counterweight body is circular or polygonal. The length of the counterweight body in the vertical direction is greater than the ascending stroke of the annular member 15 .

[0024] Embodiment 2: The position of the annular member 15 is higher than the position of the other end of the spring 2, and the plurality of hooks 16 clamp and fix the hook 11 by clamping inwards during the rising process of the annular member 15. The rest is the same as the first embodiment.

[0025] Embodiment 3: The position of the ring member 15 is lower than the position of the lower end of the hook 16, and the hooks 16 clamp and fix the hook 11 by first opening outwards and then clamping inwards during the rising process of the ring member 15. The rest is the same as the first embodiment.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0027] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. An anti-sway hoisting device for a crane, comprising a crane boom (1), the crane boom being provided with a suspension rope system and a pulley assembly (3), the suspension rope system comprising a suspension rope (10) and a suspension hook (11) connected to one end of the suspension rope, a fixed shaft (6) being installed on the crane boom, one end of the pulley assembly being sleeved on the fixed shaft, and a suspension rope limiting mechanism (5) being movably installed on the other end of the pulley assembly via a rotating shaft (4), the suspension rope passing through the pulley assembly and the suspension rope limiting mechanism, characterized in that: The suspension rope limiting mechanism (5) can limit the swing amplitude of the suspension rope, and the suspension rope limiting mechanism (5) can also clamp and fix the suspension hook when the suspension rope is reeled in.

2. The anti-sway hoisting device for a crane according to claim 1, characterized in that: The rope limiting mechanism (5) comprises a U-shaped frame (7), a guide tube (12) and a damper (13), the upper end of the U-shaped frame is movably connected to the two ends of the rotating shaft respectively, two wire pressing wheels (8) are installed in the U-shaped frame, a wire passing hole (9) is provided on the lower end surface of the U-shaped frame, the upper end of the guide tube is detachably connected to the lower surface of the U-shaped frame, a plurality of wire pressing wheels are provided in the guide tube, a clamping assembly is installed at the lower end of the guide tube, an outer edge (14) is provided on the outer side surface of the guide tube, the outer edge is movably connected to one end of the damper, and the other end of the damper is movably connected to the crane boom.

3. The anti-sway hoisting device for a crane according to claim 2, characterized in that: The clamping assembly comprises an annular member (15) and a plurality of hooks (16), wherein the upper end of the hook is movably connected to the edge of the lower end of the guide tube, and the hook can perform a clamping action around the lower end of the guide tube. The annular member is located directly below the guide tube, and the lifting rope passes through the inner hole of the annular member. The lifting hook can push the annular member to rise. A plurality of springs (2) are arranged on the outer edge of the annular member, and the plurality of springs and the plurality of hooks are in a one-to-one correspondence. One end of the spring is movably connected to the outer edge of the annular member, and the other end of the spring is movably connected to the side surface of the hook. During the rising process, the annular member can drive the plurality of hooks to clamp the lifting hook.

4. The anti-sway hoisting device for a crane according to claim 3, characterized in that: The length value of the spring matches the position and travel distance value of the ring.

5. The anti-sway hoisting device for a crane according to claim 4, characterized in that: The position of the annular member is lower than the position of the other end of the spring, and the plurality of hook claws clamp and fix the hook by first opening outwards and then clamping inwards during the rising process of the annular member; Alternatively, the position of the annular member is higher than the position of the other end of the spring, and the plurality of hook claws clamp and fix the hook by means of an inward clamping action during the rising process of the annular member.

6. The anti-sway hoisting device for a crane according to claim 5, characterized in that: The hook claw is an "L"-shaped structure formed by bending a rod, and the outer surface of the hook claw is wrapped with an elastic material to ensure that the coating on the surface of the hook will not be damaged when the hook claw clamps the hook.

7. The anti-sway hoisting device for a crane according to claim 6, characterized in that: The hook comprises two parts, a counterweight body and a hook. The lower surface of the counterweight body is fixedly connected to the upper end of the hook, and the upper end of the counterweight body is connected to the lifting rope.

8. The anti-sway hoisting device for a crane according to claim 7, characterized in that: The counterweight body is a columnar structure.

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