Lifting appliance and lifting equipment for constructional engineering

Abstract

The utility model provides a lifting appliance and lifting equipment for constructional engineering. The lifting appliance for constructional engineering comprises a lifting beam and a lifting hook, the hanging beam is connected with a sling through a pulley block. The lifting hook is rotationally connected with the lifting beam through a rotary connecting piece, and the lifting hook is rotationally connected with a balancing weight in the direction perpendicular to the length of the lifting hook. A lever assembly is fixed to the lifting beam and comprises a connecting rod and a lever, the lever is arranged in the direction from the lifting hook to the balancing weight, one end of the lever directly faces the lifting hook, and the other end of the lever directly faces the balancing weight. The connecting rod is parallel to the length direction of the lifting hook, one end of the connecting rod is fixedly connected with the lifting beam, and the lever is rotationally connected with the other end of the connecting rod by taking the connecting rod as a shaft. The lifting hook swings to push one end of the lever to rotate, and the other end of the lever pushes the balancing weight to swing reversely. According to the lifting appliance for constructional engineering, the shaking amplitude of the lifting hook can be reduced.

Description

Technical Field

[0001] This application relates to the field of construction, and more specifically, to a lifting tool and hoisting equipment for construction projects. Background Technology

[0002] In the field of construction hoisting, lifting equipment (such as lifting beams and rotating hook assemblies) is a key piece of equipment for transferring heavy loads such as precast components, steel structures, and rebar cages. Although traditional lifting equipment can achieve free rotation of the hook through a bearing structure, it often experiences continuous swaying under dynamic working conditions, which seriously affects construction safety and efficiency.

[0003] When a crane brakes suddenly during lifting or lateral movement, the flexible load suspended below the lifting device (such as a reinforcing cage or space frame) will continue to swing due to inertia, causing the lifting device to sway. Alternatively, during high-altitude operations, lateral wind forces acting on loads with large slender ratios (such as precast columns or steel trusses) can induce horizontal sinusoidal oscillations. Uneven stress distribution at lifting points due to irregularly shaped components (such as L-shaped beams or asymmetrical equipment) can also cause the lifting device to sway. A swaying load is prone to colliding with the work platform, support structure, or construction personnel. Continuous oscillation during component docking (with a period of 5-10 seconds) forces the lifting operation to pause, requiring repeated manual adjustments to the positioning. Utility Model Content

[0004] This application provides a lifting tool and hoisting equipment for construction engineering, which can reduce the sway amplitude of the hook.

[0005] Specifically, this application is implemented through the following technical solution:

[0006] One aspect of this application provides a lifting device for construction engineering, including...

[0007] A lifting beam is used to connect to slings via a pulley system.

[0008] The hook is rotatably connected to the lifting beam via a rotating connector, and a counterweight is rotatably connected to the hook along a direction perpendicular to its length.

[0009] The lifting beam is fixed with a lever assembly, which includes a connecting rod and a lever. The lever is arranged in the direction from the hook to the counterweight, with one end of the lever facing the hook and the other end facing the counterweight.

[0010] The connecting rod is arranged parallel to the length of the hook, one end of the connecting rod is fixedly connected to the lifting beam, and the lever is rotatably connected to the other end of the connecting rod with the connecting rod as the axis.

[0011] The hook swings, pushing one end of the lever to rotate, and the other end of the lever pushes the counterweight to swing in the opposite direction.

[0012] Optionally, the counterweight includes a first counterweight connected to the front side of the hook and a second counterweight connected to the rear side of the hook; the lever also includes a first lever located on the left side of the hook and a second lever located on the right side of the hook, one end of the first lever being directly opposite the hook and the other end being directly opposite the first counterweight, and one end of the second lever being directly opposite the hook and the other end being directly opposite the second counterweight.

[0013] Optionally, the counterweight includes a swinging part and a counterweight box, the lever is opposite to the swinging part, the counterweight box includes a detachable cover, and the counterweight box is used to hold a certain amount of counterweight material.

[0014] Optionally, the lever has a first groove and a second groove on its side facing the hook, the first groove being directly opposite the hook and the second groove being directly opposite the counterweight.

[0015] Optionally, the distance from the connection point of the lever and the connecting rod to the end of the lever directly opposite the hook is a first dimension, and the distance from the connection point of the lever and the connecting rod to the counterweight is a second dimension. The first dimension is greater than the second dimension, and the ratio of the first dimension to the second dimension is 1.5:1.

[0016] Optionally, the lever and the connecting rod are rotatably connected by a torsion spring.

[0017] Optionally, when the lever and the hook are parallel in the direction pointing towards the counterweight, the torque of the torsion spring is in a free state.

[0018] Another aspect of this application provides a lifting device, including the lifting tools for construction projects described in any of the preceding claims.

[0019] This application provides a lifting device and hoisting equipment for construction engineering, including a lifting beam and a hook. When the hook is subjected to an external force and swings horizontally, the hook pushes one end of a lever (facing the hook) to rotate around the connecting rod axis. The other end of the lever (facing the counterweight) then pushes the counterweight to swing in the opposite direction, forming a dynamic equilibrium couple. During this process, the moment of inertia of the counterweight is opposite to the load torque of the hook, which can directly cancel out part of the kinetic energy of the swing. This reduces the swaying amplitude of the hook, allowing the cargo to maintain a relatively stable posture in the air, greatly reducing the risk of the cargo colliding with surrounding building structures, equipment, or other objects, and ensuring the safety of the construction site. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a lifting device shown in an exemplary embodiment of this application;

[0021] Figure 2This is a partially enlarged view of a lifting device illustrated in an exemplary embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the bottom of the lifting device shown in an exemplary embodiment of this application;

[0023] Figure 4 This is a front view of the lifting device shown in an exemplary embodiment of this application;

[0024] Figure 5 This is a side view of the lifting device shown in an exemplary embodiment of this application.

[0025] Wherein: 100, lifting beam; 110, connecting rod; 120, lever; 121, first lever; 122, second lever; 120a, first groove; 120b, second groove; 200, hook; 210, counterweight; 211, first counterweight; 212, second counterweight; 210a, swinging part; 210b, counterweight box; 300, pulley block. Detailed Implementation

[0026] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0028] Please refer to Figure 1 , Figure 2 and Figure 5 This application provides a lifting device for construction engineering, including a lifting beam 100 and a hook 200. The lifting beam 100 is used to connect to the slings of a crane via a pulley block 300, transmitting the lifting force of the crane to the lifting device system to achieve cargo lifting control. The hook 200 is rotatably connected to the lifting beam 100 via a rotating connector. The bottom of the hook 200 suspends the load, and the top is connected to the lifting beam 100 via the rotating connector. Here, the rotating connector includes a thrust bearing and a locking nut, allowing the hook 200 to rotate freely 360° (the specific rotating connector is not shown in the figure).

[0029] Along the length direction perpendicular to the hook 200 (referring to the direction facing the ground when the hook 200 is in normal working condition), which is also the horizontal direction, the hook 200 is rotatably connected to a counterweight 210. For example, in the horizontal direction, a support rod is fixed to the hook 200, and the counterweight 210 is rotatably connected to the support rod. The lifting beam 100 is fixed with a lever 120 assembly, which includes a connecting rod 110 and a lever 120. The lever 120 is arranged along the direction from the hook 200 to the counterweight 210 (i.e., the horizontal direction), with one end of the lever 120 facing the hook 200 and the other end facing the counterweight 210. The connecting rod 110 is set parallel to the length of the hook 200. One end of the connecting rod 110 is fixedly connected to the lifting beam 100. The lever 120 is rotatably connected to the other end of the connecting rod 110 with the connecting rod 110 as the axis. When the hook 200 swings, it pushes one end of the lever 120 to rotate, and the other end of the lever 120 pushes the counterweight 210 to swing in the opposite direction.

[0030] When the hook 200 is subjected to an external force (such as wind or sudden stop inertia) and swings horizontally, the hook 200 will push one end of the lever 120 (the side facing the hook 200) to rotate around the axis of the connecting rod 110. The other end of the lever 120 (the side facing the counterweight 210) will then push the counterweight 210 to swing in the opposite direction, forming a dynamic equilibrium couple. During this process, the moment of inertia of the counterweight 210 is opposite to the load torque of the hook 200, which can directly cancel out part of the kinetic energy of the swing. This reduces the swaying amplitude of the hook 200, allowing the cargo to maintain a relatively stable posture in the air, greatly reducing the risk of the cargo colliding with surrounding building structures, equipment, or other objects, and ensuring the safety of the construction site.

[0031] Combination Figure 3 and Figure 4In one embodiment, the counterweight 210 includes a first counterweight 211 connected to the front side of the hook 200 and a second counterweight 212 connected to the rear side of the hook 200; the lever 120 also includes a first lever 121 located on the left side of the hook 200 and a second lever 122 located on the right side of the hook 200. One end of the first lever 121 faces the hook 200 and the other end faces the first counterweight 211. One end of the second lever 122 faces the hook 200 and the other end faces the second counterweight 212. When the load swings to the left, the hook 200 pushes the left first lever 121 to rotate, and then the first lever 121 drives the right second counterweight 212 to swing to the right, so that the inertial force of the counterweight 210 forms a rightward resisting torque, which counteracts part of the leftward swing energy. When the load swings to the right, the hook 200 pushes the second lever 122 on the right to rotate, which in turn drives the first counterweight 211 on the left to swing to the left, generating a leftward resisting torque that neutralizes part of the rightward swing energy. This more comprehensively reduces the sway amplitude of the hook 200. The two levers 120 and the two counterweights 210 are spatially orthogonal, ensuring that their movements do not interfere with each other.

[0032] Combination Figure 2 In one embodiment, the counterweight 210 includes a swinging part 210a and a counterweight box 210b. A lever 120 faces the swinging part 210a. The counterweight box 210b includes a detachable cover and is used to hold a fixed amount of counterweight material. The swinging part 210a can be elongated, and the counterweight box 210b can be trapezoidal. The elongated swinging part 210a is more convenient to cooperate with the lever 120, ensuring that when the hook 200 is swung by an external force, the lever 120 can efficiently push the swinging part 210a, causing the counterweight 210 to swing in the opposite direction. The trapezoidal design and detachable cover of the counterweight box 210b facilitate the loading of counterweight materials such as cast iron shot, iron sand, and concrete blocks. The weight can be flexibly adjusted according to actual working conditions to adapt to different wind speeds and inertial impacts. Pre-assembling a customized counterweight scheme improves lifting stability and safety, ensuring smooth construction.

[0033] refer to Figure 2 In one embodiment, the lever 120 has a first groove 120a and a second groove 120b on its side facing the hook 200. The first groove 120a faces the hook 200, and the second groove 120b faces the counterweight 210. Specifically, the first groove 120a can be shaped to match the sidewall of the hook 200, allowing the lever 120 to respond more precisely to the swing of the hook 200 and push the counterweight 210 to swing in the opposite direction. The second groove 120b can be shaped to match the swinging part 210a of the counterweight 210, ensuring a tight fit between the second groove 120b and the swinging part 210a, thus ensuring efficient force transmission and enabling the swing of the hook 200 and the counterweight 210 to interact more accurately.

[0034] In one embodiment, the length from the point where the lever 120 connects to the connecting rod 110 to the end of the lever 120 directly opposite the hook 200 is a first dimension, and the length from the point where the lever 120 connects to the connecting rod 110 to the counterweight 210 is a second dimension. The first dimension is larger than the second dimension, and the ratio of the first dimension to the second dimension is 1.5:1. That is, the length from the hinge point of the lever 120 to the end of the hook 200 (first dimension L1) and the length to the end of the counterweight 210 (second dimension L2) satisfy L1:L2=1.5:1. This converts the small swing of the hook 200 into a higher-intensity thrust on the counterweight 210, significantly increasing the reverse anti-swing torque and quickly offsetting the swing energy of the hook 200. The force amplification effect of the lever 120 drives the counterweight 210 to respond more quickly to counteract disturbances and suppress the expansion of the swing amplitude caused by sudden wind or sudden stop impacts.

[0035] In one embodiment, lever 120 and connecting rod 110 are rotatably connected by a torsion spring (not shown). The torsion spring is sleeved on the connecting rod 110. When hook 200 swings, when hook 200 swings under external force, lever 120 rotates around connecting rod 110, torsion spring is twisted and generates torque, forming a reverse torque to buffer the swing and further reduce the swing amplitude of hook 200.

[0036] In one embodiment, when the lever 120 and the hook 200 are parallel in the direction pointing towards the counterweight 210, the torque of the torsion spring is in a free state. When the lever 120 and the hook 200 are parallel in the direction pointing towards the counterweight 210, the torsion spring is in a free state, the lever 120 is horizontal, and the torsion spring has no torque output. In this state, the distances between the two ends of the lever 120 and the hook 200 and the counterweight 210 are approximately equal, making the swing suppression forces at both ends of the lever 120 approximately symmetrical, and the starting thresholds approximately the same, reducing the possibility that the hook 200 cannot push the lever 120 during swing.

[0037] This application also provides a lifting device, such as a tower crane, gantry crane, crawler crane, or bridge erecting machine. The lifting device includes the construction lifting equipment provided in any of the above embodiments. By integrating the aforementioned construction lifting equipment, the stability and safety of the lifting operation are significantly improved. During operation, when the hook 200 swings due to external force, the lifting equipment can effectively suppress the swaying of the hook 200 through the cooperation of the lever 120 and the counterweight 210, as well as the buffering effect of the torsion spring, thereby reducing the swing amplitude of the lifted object, lowering the risk of collision, and improving lifting accuracy and efficiency. Simultaneously, the flexible counterweight adjustment mechanism of the lifting equipment allows it to adapt to different lifting environments and working conditions, further expanding the applicability of the lifting equipment and enhancing its practicality and reliability in diverse construction scenarios.

[0038] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A lifting device for construction projects, characterized in that, include A lifting beam (100) is used to connect to a sling via a pulley block (300); The hook (200) is rotatably connected to the lifting beam (100) via a rotating connector. Along the direction perpendicular to the length of the hook (200), the hook (200) is rotatably connected to a counterweight (210). The lifting beam (100) is fixed with a lever (120) assembly, which includes a connecting rod (110) and a lever (120). The lever (120) is arranged along the direction from the hook (200) to the counterweight (210), with one end of the lever (120) facing the hook (200) and the other end facing the counterweight (210). The connecting rod (110) is arranged parallel to the length of the hook (200). One end of the connecting rod (110) is fixedly connected to the lifting beam (100). The lever (120) is rotatably connected to the other end of the connecting rod (110) with the connecting rod (110) as the axis. The hook (200) swings, pushing one end of the lever (120) to rotate, and the other end of the lever (120) pushes the counterweight (210) to swing in the opposite direction.

2. The lifting device for construction projects as described in claim 1, characterized in that, The counterweight (210) includes a first counterweight (211) connected to the front side of the hook (200) and a second counterweight (212) connected to the rear side of the hook (200); the lever (120) also includes a first lever (121) located on the left side of the hook (200) and a second lever (122) located on the right side of the hook (200), one end of the first lever (121) facing the hook (200) and the other end facing the first counterweight (211), one end of the second lever (122) facing the hook (200) and the other end facing the second counterweight (212).

3. The lifting device for construction projects as described in claim 1, characterized in that, The counterweight (210) includes a swinging part (210a) and a counterweight box (210b), the lever (120) is opposite to the swinging part (210a), the counterweight box (210b) includes a removable cover, and the counterweight box (210b) is used to hold a certain amount of counterweight material.

4. The lifting device for construction projects as described in claim 3, characterized in that, The lever (120) has a first groove (120a) and a second groove (120b) on the side facing the hook (200), the first groove (120a) is directly opposite the hook (200), and the second groove (120b) is directly opposite the counterweight (210).

5. The lifting device for construction projects as described in claim 1, characterized in that, The length of the connection point between the lever (120) and the connecting rod (110) from the end of the lever (120) directly opposite the hook (200) is a first dimension, and the length of the connection point between the lever (120) and the connecting rod (110) from the end of the lever (120) directly opposite the counterweight (210) is a second dimension. The first dimension is greater than the second dimension, and the ratio of the first dimension to the second dimension is 1.5:

1.

6. The lifting device for construction projects as described in claim 1, characterized in that, The lever (120) and the connecting rod (110) are rotatably connected by a torsion spring.

7. The lifting device for construction projects as described in claim 6, characterized in that, When the lever (120) and the hook (200) are parallel in the direction pointing to the counterweight (210), the torque of the torsion spring is in a free state.

8. A hoisting device, characterized in that, Includes the lifting equipment for construction projects as described in any one of claims 1 to 7.

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