A lifting device with dynamically adjustable inner hook position

Abstract

The utility model discloses a kind of lifting appliance of dynamic adjustment inner hook position, including annular frame, the annular frame is fixed with the 4 raceway grooves of circumferential uniform distribution, the inside of annular frame is equipped with center disc, the inner end of 4 raceway grooves is fixed with center disc, the right side of raceway groove is all set up with aperture, raceway groove is equipped with the hook mechanism that can move inside and outside, center disc is equipped with carousel, the center position of carousel is fixed with vertical cylinder, spiral groove is set up on the lateral wall of vertical cylinder, rotating shaft is equipped in vertical cylinder, rotating shaft is fixed with side column on lateral wall, side column is embedded in spiral groove, carousel is fixed with the 4 evenly distributed stand, connecting rod is hinged on stand, connecting rod is hinged with hook mechanism by aperture and extends into raceway groove, the utility model is by the lifting and release dynamic adjustment hook of secondary lifting chain, to adapt to different size annular forge piece, hook can be automatically moved inward or outward, without manual adjustment by worker, efficiency is high, safety is high.

Description

Technical Field

[0001] This utility model relates to the field of forging hoisting equipment, and in particular to a hoisting device with dynamically adjustable inner hook position. Background Technology

[0002] Ring forgings are commonly used industrial products.

[0003] Ring forgings require hoisting during forging, processing, installation, and use. However, some workshops have compact equipment layouts and narrow lifting spaces, making external hoisting inconvenient. This necessitates internal hook lifting devices. Internal hook lifting devices have a compact structural design that cleverly utilizes the internal space of the ring forging for hoisting. They typically employ special hook or clamp structures that can penetrate deep into the inner hole or inner ring of the ring forging, achieving stable hoisting without occupying excessive external space.

[0004] However, when faced with ring forgings of different sizes, the position of the inner hook of the existing lifting tool is fixed and cannot be adjusted or is difficult to adjust. This results in the application of products with limited size or a narrow range. Before lifting, workers need to manually adjust the position of the inner hook, and during the lifting process, workers still need to push the inner hook to the position of the lifting hook. This is an existing problem. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a lifting device with dynamically adjustable inner hook position.

[0006] This utility model is achieved through the following technical solution: A lifting device with dynamically adjustable inner hook position includes an annular frame, characterized in that: four circumferentially evenly distributed roller grooves are fixed on the annular frame; a central disk is provided inside the annular frame; the inner ends of the four roller grooves are fixed to the central disk; the outer ends of the roller grooves extend out of the annular frame; a notch is provided on the right side of each roller groove; a hook mechanism that can move inward and outward is provided inside the roller groove; a turntable is provided on the central disk; a vertical cylinder is fixed at the center of the turntable; a spiral groove is provided on the side wall of the vertical cylinder; a rotating shaft is provided inside the vertical cylinder; a side column is fixed on the side wall of the rotating shaft; the side column is embedded in the spiral groove; four evenly distributed columns are fixed on the turntable; a connecting rod is hinged to the column; the connecting rod extends into the roller groove through the notch and is hinged to the hook mechanism; a main lifting chain is connected to the annular frame; and an auxiliary lifting chain is connected to the upper end of the rotating shaft.

[0007] In a further optimized manner, the hook mechanism includes a hook, a fixed shaft, a connector, and two rollers. A gap is provided at the bottom of the raceway groove, and sliding grooves are provided on the lower walls of the raceway groove on both sides of the gap. The rollers are rotatably connected to the fixed shaft, and the two rollers are respectively located in a sliding groove. The hook and the connector are fixed on the fixed shaft. The hook passes downward through the gap, and the upper end of the connector is hinged to the connecting rod.

[0008] Further optimized, both the central disk and the turntable have through holes at their center positions, and the lower end of the rotating shaft passes through the through holes.

[0009] Further optimized, the main suspension chain has 4 chains, and the connection points of the 4 main suspension chains and the ring frame are evenly distributed in a circumferential direction.

[0010] In a further optimized configuration, an annular sub-groove is fixed on the central disk, and an annular female groove is fixed at the bottom of the turntable. The female groove is fastened onto the sub-groove, and a steel ball is provided between the female groove and the sub-groove. The central disk and the turntable are rotatably connected through the female groove, the sub-groove, and the steel ball.

[0011] Further optimized, the bottom of the hook is a right-angle hook extending outward.

[0012] The beneficial effects of this utility model are: This new type of lifting device dynamically adjusts the hook by pulling and releasing the auxiliary lifting chain to accommodate ring forgings of different sizes. The hook can move automatically inward or outward, eliminating the need for manual adjustment by workers, resulting in high efficiency and safety. Four sets of inner hooks further enhance the balance of the ring forging, reducing swaying and swinging, and improving lifting stability.

[0013] When this new type of lifting device is in use, the main lifting chain extends the lifting device into the annular forging and lowers it to the bottom. The auxiliary lifting chain drives the vertical cylinder and turntable to rotate in both directions by releasing or pulling the rotating shaft, thereby causing the hook mechanism to move outward or inward. When the hook mechanism moves outward, the bottom of the right-angle hook extends to the bottom of the forging, and the main lifting chain can lift the annular forging. After the forging is placed, the hook mechanism moves inward, the right-angle hook retracts, and the main lifting chain pulls out the lifting device. No manual adjustment by the worker is required, making it convenient to use. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the present invention for lifting a ring-shaped forging.

[0016] Figure 3 This is an enlarged schematic diagram of the raceway groove in this utility model. Figure 1 .

[0017] Figure 4This is an enlarged schematic diagram of the raceway groove in this utility model. Figure 2 . Figure 5 This is a three-dimensional schematic diagram of the annular frame and the central disk in this utility model.

[0018] Figure 6 This is a three-dimensional schematic diagram of the turntable and vertical cylinder in this utility model.

[0019] In the diagram: 11. Main lifting chain; 12. Secondary lifting chain; 2. Vertical cylinder; 21. Spiral groove; 3. Rotating shaft; 31. Side column; 4. Annular frame; 5. Raceway groove; 51. Notch; 52. Clearance; 53. Slide groove; 6. Center plate; 61. Sub-groove; 62. Through hole; 7. Turntable; 71. Column; 72. Connecting rod; 8. Hook mechanism; 81. Roller; 82. Fixed shaft; 83. Connecting piece; 84. Hook; 9. Annular workpiece. Detailed Implementation

[0020] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. In the description of this invention, it should be noted that the terms "left," "right," "front," "rear," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] like Figures 1-6 As shown, this utility model provides a lifting device with dynamically adjustable inner hook position, including an annular frame 4. Four circumferentially evenly distributed roller grooves 5 are fixed on the annular frame 4. A central disk 6 is provided inside the annular frame 4. The inner ends of the four roller grooves 5 are fixed to the central disk 6, and the outer ends of the roller grooves 5 extend out of the annular frame 4. Each of the four raceway grooves 5 has a notch 51 on its right side. The notches of the four raceway grooves are on the same side. A hook mechanism 8 that can move inward and outward is provided in the raceway groove 5. A rotatable turntable 7 is provided on the central disk 6. A vertical cylinder 2 is fixed at the center of the turntable 7. A spiral groove 21 is provided on the side wall of the vertical cylinder 2. A rotating shaft 3 is provided in the vertical cylinder 2. A side column 31 is fixed on the side wall of the rotating shaft 3. The side column is embedded in the spiral groove 21. Four evenly distributed columns 71 are fixed on the turntable 7. A connecting rod 72 is hinged to the column 71. The connecting rod 72 extends into the raceway groove 5 through the notch 51 and is hinged to the hook mechanism 8. A main lifting chain 11 is connected to the annular frame 4. An auxiliary lifting chain 12 is connected to the upper end of the rotating shaft 3. It should be noted that this lifting device needs to be used with a crane with main and auxiliary hooks, because the main and auxiliary lifting chains need to be lifted and lowered simultaneously or individually.

[0022] As a preferred implementation method, such as Figure 3 , 4 As shown, the hook mechanism 8 includes a hook 84, a fixed shaft 82, a connecting member 83, and two rollers 81. A gap 52 is provided at the bottom of the raceway 5, and sliding grooves 53 are provided on the lower wall of the raceway 5 on both sides of the gap 52. The rollers 81 are rotatably connected to the fixed shaft 82, and the two rollers 81 are respectively located in one sliding groove 53. The hook 84 and the connecting member 83 are fixed on the fixed shaft 82. The hook 84 passes downward through the gap 52. The upper end of the connecting member 83 is hinged to the connecting rod 72. When the turntable rotates, the hook mechanism 8 moves inward or outward along the raceway through the connecting rod.

[0023] In a preferred embodiment, both the central disk 6 and the turntable 7 have through holes 62 at their center positions. The lower end of the rotating shaft 3 passes through the through hole 62, ensuring that the rotating shaft has a certain length and weight. This ensures that when the auxiliary lifting chain releases the rotating shaft, the rotating shaft 3 can drive the turntable to rotate under its own weight through the side column and the spiral groove. However, the rotating shaft should not be too long to avoid the lower end of the rotating shaft being lower than the hook.

[0024] In a preferred embodiment, the main lifting chain 11 has 4 chains, and the connection points of the 4 main lifting chains 11 and the ring frame 4 are evenly distributed in a circumferential direction. The 4 sets of inner hooks can better control the balance of the ring forging, reduce swaying and swinging, and improve the stability of lifting.

[0025] In a preferred embodiment, an annular sub-groove 61 is fixed on the central disk 6, and an annular female groove is fixed at the bottom of the turntable 7. The female groove is fastened to the sub-groove 61, and a steel ball is provided between the female groove and the sub-groove 61. The central disk 6 and the turntable 7 are rotatably connected through the female groove, the sub-groove 61 and the steel ball, making the relative rotation of the central disk and the turntable smoother.

[0026] In a preferred embodiment, the bottom of the hook 84 is a right-angle hook extending outwards. The annular workpiece is placed on a pad, and the right-angle hook extends to the bottom of the annular forging. Then, the main lifting chain lifts the lifting device and the forging together.

[0027] More specifically, the usage method is as follows: This lifting device needs to be used in conjunction with an overhead crane equipped with main and auxiliary hooks.

[0028] 1. The main hook of the crane lifts the entire lifting device via the main lifting chain, and the auxiliary hook is connected to the rotating shaft via the auxiliary lifting chain. The auxiliary lifting chain controls the up and down movement of the rotating shaft.

[0029] 2. The main lifting chain lifts the lifting device and keeps it stationary. The auxiliary lifting chain releases the rotating shaft. Under its own weight, the rotating shaft causes the side column to move downward along the spiral groove, driving the vertical cylinder and turntable to rotate counterclockwise, thereby driving the connecting parts, rollers and hooks to move towards the center.

[0030] 3. Then the main lifting chain lifts the lifting device into the workpiece and lowers it to the bottom. The rotating shaft is then pulled up, and the side column on the rotating shaft moves upward along the spiral groove, driving the vertical cylinder and turntable to rotate clockwise. This causes the connecting parts, rollers and hook to move outward until the hook is firmly inserted into the bottom of the forging, and the auxiliary hook stops pulling.

[0031] 4. The main and auxiliary lifting chains lift the workpiece simultaneously. After the workpiece is lowered, the auxiliary lifting chain releases the rotating shaft, and the hook moves inward. After detaching from the workpiece, the main and auxiliary lifting chains lift simultaneously to lift the lifting device out.

[0032] All aspects not detailed in this utility model are well-known to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lifting device with dynamically adjustable inner hook position, comprising a ring frame, characterized in that: Four circumferentially evenly distributed raceway grooves are fixed on the annular frame. A central disk is provided inside the annular frame. The inner ends of the four raceway grooves are fixed to the central disk, and the outer ends of the raceway grooves extend out of the annular frame. A notch is provided on the right side of each raceway groove. A hook mechanism that can move inward and outward is provided inside the raceway groove. A turntable is provided on the central disk. A vertical cylinder is fixed at the center of the turntable. A spiral groove is provided on the side wall of the vertical cylinder. A rotating shaft is provided inside the vertical cylinder. A side column is fixed on the side wall of the rotating shaft. The side column is embedded in the spiral groove. Four evenly distributed columns are fixed on the turntable. A connecting rod is hinged to the column. The connecting rod extends into the raceway groove through the notch and is hinged to the hook mechanism. A main lifting chain is connected to the annular frame. An auxiliary lifting chain is connected to the upper end of the rotating shaft.

2. The lifting device with dynamically adjustable inner hook position according to claim 1, characterized in that: The hook mechanism includes a hook, a fixed shaft, a connector, and two rollers. A gap is provided at the bottom of the raceway groove, and sliding grooves are provided on the lower walls of the raceway groove on both sides of the gap. The rollers are rotatably connected to the fixed shaft, and the two rollers are respectively located in a sliding groove. The hook and the connector are fixed on the fixed shaft. The hook passes downward through the gap, and the upper end of the connector is hinged to the connecting rod.

3. The lifting device with dynamically adjustable inner hook position according to claim 1, characterized in that: Both the central disk and the turntable have through holes at their center positions, and the lower end of the rotating shaft passes through the through holes.

4. The lifting device with dynamically adjustable inner hook position according to claim 1, characterized in that: The main suspension chain has 4 chains, and the connection points of the 4 main suspension chains and the ring frame are evenly distributed in a circumferential direction.

5. The lifting device with dynamically adjustable inner hook position according to claim 1, characterized in that: The central disk has a fixed annular sub-groove, and the bottom of the turntable has a fixed annular female groove. The female groove is fastened to the sub-groove, and a steel ball is provided between the female groove and the sub-groove. The central disk and the turntable are rotatably connected through the female groove, the sub-groove, and the steel ball.

6. The lifting device with dynamically adjustable inner hook position according to claim 2, characterized in that: The bottom of the hook is a right-angle hook that extends outward.

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