Self-balancing spreader

Abstract

The utility model discloses a kind of self-balancing lifting appliances, including hanger, sling and lifting hook, the hanger appearance is rectangular frame structure, two sides of the upper end of hanger are equipped with two lifting point seats, the bottom of hanger two sides are equipped with multiple symmetrical distribution's fixed pulley, and two fixed pulleys are installed in the two ends of each side of hanger, every side of hanger is also each installed with two movable pulleys;Two slings are sequentially passed through the fixed pulley and movable pulley of hanger two sides respectively, two ends of sling and the bottom of movable pulley each install a lifting hook, and form balanced hoisting structure;The utility model adopts left and right two groups of sling and pulley group to realize that workpiece left and right sides are stressed respectively, increase the type or state of hoist workpiece. Meanwhile, pulley group formed by movable pulley and fixed pulley, realize that sling can slide on pulley, realize that each endpoint of sling can automatically distribute load and realize the effect of simultaneous tensioning and stress, to reduce the uneven deformation of workpiece stress.

Description

Technical Field

[0001] This utility model relates to the field of lifting device structure technology, and in particular to a self-balancing lifting device. Background Technology

[0002] In logistics, industrial manufacturing, and construction, lifting equipment is a core component for material handling and transfer. Its balance directly impacts lifting efficiency, material safety, and ease of operation. Our company's standard lifting equipment consists of commercially available double-hook or four-hook chain lifting devices, which require a certain level of rigidity in the workpiece. Lifting workpieces with insufficient rigidity may cause deformation or even damage. Therefore, when lifting such workpieces, it is necessary to consider the forces acting on the workpiece and distribute the force as evenly as possible to different locations to reduce uneven stress and deformation. To address these issues, this invention provides a self-balancing lifting device. Summary of the Invention

[0003] The purpose of this invention is to provide a self-balancing lifting device.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A self-balancing lifting device includes a frame, slings, and hooks. The frame has a rectangular frame structure. Two lifting points are provided on each of the upper two sides of the frame. Multiple symmetrically distributed fixed pulleys are provided on both sides of the bottom of the frame, with two fixed pulleys installed at both ends of each side of the frame. Two movable pulleys are also installed on each side of the frame. Two slings pass through the fixed pulleys and movable pulleys on both sides of the frame in sequence. A hook is installed at each end of the slings and at the bottom of each movable pulley, forming a balanced lifting structure.

[0005] Furthermore, three fixed pulleys are installed on each side of the hanger, and two movable pulleys are installed on the sling between the two intervals of the three fixed pulleys.

[0006] Furthermore, five fixed pulleys are installed on each side of the hanger, and two movable pulleys are installed on the sling between the two intervals of the three fixed pulleys in the middle.

[0007] Furthermore, the bottom of each movable pulley is fixedly connected by a hanging rope hook.

[0008] Furthermore, the sling is equipped with limiters, which are distributed at both ends of the sling and on the sling between the movable pulley and the outer fixed pulley.

[0009] In summary, this utility model has the following beneficial effects: 1. By using two sets of slings and pulleys on the left and right sides, the workpiece can be subjected to force on both sides, increasing the types or states of workpieces that can be lifted.

[0010] 2. A pulley system consisting of movable and fixed pulleys is adopted to allow the sling to slide on the pulleys, so that the load can be automatically distributed to each end of the sling, achieving the effect of simultaneous tension and force, thereby reducing the deformation of the workpiece due to uneven force. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model; Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention; Figure 3 This is a perspective view of Embodiment 2 of this utility model; Figure 4 This is a structural schematic diagram of Embodiment 3 of this utility model; In the diagram, 1 is the hanger; 2 is the fixed pulley; 3 is the sling; 4 is the hook; 5 is the movable pulley; 6 is the rope; 7 is the limit switch; and 8 is the lifting point seat. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0013] Example 1: As Figure 1 As shown, a self-balancing lifting device includes a frame 1, slings 3, and hooks 4. The frame 1 has a rectangular frame structure. Two lifting point seats 8 are provided on each of the upper two sides of the frame 1. Three symmetrically distributed fixed pulleys 2 are provided on each of the bottom two sides of the frame 1, with two fixed pulleys 2 installed at both ends of each side of the frame 1. Two movable pulleys 5 are also installed on each side of the frame 1. Two slings 3 pass sequentially through the fixed pulleys 2 and movable pulleys 5 on both sides of the frame 1. The two movable pulleys 5 are installed on the slings 3 between the two intervals of the three fixed pulleys 2. A hook 4 is installed at each end of the sling 3 and at the bottom of each movable pulley 5, forming a structure as shown. Figure 1 The diagram shows a balanced lifting structure. When lifting a workpiece, a standard 4-hook lifting tool is used to hook the lifting point 8 above the lifting frame 1 to lift the lifting tool of this invention. Then, all the hooks 5 of this invention are hooked onto the lifting position of the workpiece. The lifting tool and the workpiece are then lifted as a whole, achieving stable lifting of the workpiece.

[0014] Example 2: Figure 2 and Figure 3As shown, the difference from Embodiment 1 is that five fixed pulleys 2 are installed on each side of the hanger 1, and two movable pulleys 5 are installed on the slings 3 between the two intervals of the three fixed pulleys 2 in the middle. This ensures that the lifting angle of the slings at each of the two middle lifting points is symmetrical, thereby ensuring that the tension at each of the two lifting points is vertically upward, so as to reduce the deformation of the workpiece due to lateral force.

[0015] Example 3: Figure 4 As shown, the difference from Embodiment 2 is that the bottom of each movable pulley 5 is fixedly connected by a suspension rope 6 and a hook 4. This allows for changes in the angle of the two suspension ropes above the movable pulley 5, thus altering the vertical tension generated by the movable pulley 5. This results in a suitable ratio of tension between the two suspension points to accommodate different suspension point distributions.

[0016] Preferably, the sling 3 is equipped with limiters 7, which are distributed at both ends of the sling 3 and on the sling 3 between the movable pulley 3 and the outer fixed pulley 2. By setting the limiters 7, the sliding range of the sling is limited, thereby improving the installation performance of the hoisting.

[0017] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A self-balancing lifting device, comprising a lifting frame (1), slings (3), and hooks (4), characterized in that: The hanger (1) has a rectangular frame structure. Two lifting point seats (8) are provided on each side of the upper end of the hanger (1). Multiple fixed pulleys (2) are symmetrically distributed on both sides of the bottom of the hanger (1). Two fixed pulleys (2) are installed at both ends of each side of the hanger (1). Two movable pulleys (5) are also installed on each side of the hanger (1). Two slings (3) pass through the fixed pulleys (2) and movable pulleys (5) on both sides of the hanger (1) in sequence. A hook (4) is installed at each end of the slings (3) and at the bottom of the movable pulleys (5) to form a balanced lifting structure.

2. The self-balancing lifting device according to claim 1, characterized in that: The hanger (1) has three fixed pulleys (2) installed on each side, and two movable pulleys (5) installed on the sling (3) between the two intervals of the three fixed pulleys (2).

3. The self-balancing lifting device according to claim 1, characterized in that: Five fixed pulleys (2) are installed on each side of the hanger (1), and two movable pulleys (5) are installed on the sling (3) between the two intervals of the three fixed pulleys (2) in the middle.

4. A self-balancing lifting device according to claim 2 or 3, characterized in that: The bottom of each movable pulley (5) is fixedly connected by a rope (6) and a hook (4).

5. A self-balancing lifting device according to claim 2 or 3, characterized in that: The sling (3) is provided with a limiter (7), which is distributed at both ends of the sling (3) and on the sling (3) between the movable pulley (3) and the outer fixed pulley (2).

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