Anti-falling mechanism for crane sling

Abstract

The utility model provides an anti-falling mechanism for a crane sling, which relates to the technical field of safety protection of crane slings and comprises an outer shell, a lifting hole, a mounting frame, a driving component, an anti-falling block, a left lead screw component, a right lead screw component, a first inner shell, a second inner shell and a steel plate, according to the device, the driving assembly drives the anti-falling block to ascend and descend, then the position of a steel plate on the inner shells can be limited after clamping of the roller is completed, and if a lead screw of a certain lead screw assembly is broken subsequently, the anti-falling block can limit the position of the steel plate at the moment, so that the phenomenon that the two inner shells are directly separated from the outer shell is avoided; therefore, potential safety hazards in the lifting and transferring process of the roller are remarkably reduced, meanwhile, the clamping area of the roller can be effectively enlarged through the two sets of clamping arms arranged in a staggered mode, and then the clamping effect on the long-size roller is better.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for crane lifting devices, and more specifically, to an anti-detachment mechanism for crane lifting devices. Background Technology

[0002] Bridge cranes include both bridge cranes and gantry cranes, both of which belong to the category of bridge-type cranes. A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also known as an overhead crane, gantry crane, or hoist.

[0003] Currently, cranes are needed to lift, move, and transfer large rollers. Existing lifting clamps generally use two sets of screw assemblies facing each other to drive and clamp the rollers. However, this limits the clamping area for long rollers, and the distribution range of clamping points needs to be improved. In addition, if one of the screw assemblies breaks during the lifting and transfer process, the clamping arm will fall off, which poses a significant safety hazard and lacks anti-detachment design. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose an anti-detachment mechanism for crane lifting devices.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An anti-detachment mechanism for a crane lifting device includes a housing, a lifting hole, a mounting frame, a drive assembly, an anti-detachment block, a left lead screw assembly, a right lead screw assembly, a first inner housing, a second inner housing, and a steel plate.

[0007] The lifting holes are symmetrically located on the outer casing;

[0008] The mounting brackets are symmetrically welded onto the housing, and the mounting brackets are equipped with drive components;

[0009] The anti-detachment block is connected to a drive assembly that allows it to move vertically up and down, and the anti-detachment block moves along the lifting hole;

[0010] The left and right lead screw assemblies are misaligned on the housing.

[0011] The first inner shell is connected to the right-side lead screw assembly;

[0012] The second inner shell is connected to the left lead screw assembly, and the second inner shell moves alternately with the first inner shell;

[0013] Two steel plates are welded onto the first inner shell and the second inner shell respectively, and the two steel plates are respectively matched with two anti-detachment blocks.

[0014] Furthermore, the drive assembly includes a stepper motor, a screw, a telescopic rod, a nut, and a limiting plate. The stepper motor is fixed on the mounting frame, and the stepper motor is connected to the screw. The screw is threadedly connected to the anti-detachment block, and the end of the screw is limited by a nut to a limiting plate that contacts the anti-detachment block. The telescopic rod is symmetrically fixed on the mounting frame and connected to the anti-detachment block.

[0015] Furthermore, the outer shell is welded with fixing plates on both sides, and two perforations are staggered on the two fixing plates. The first inner shell and the second inner shell move along the two staggered perforations respectively.

[0016] Furthermore, clamping arms are welded to the bottom of the outer ends of both the first inner shell and the second inner shell, and arc-shaped plates are welded to the clamping arms.

[0017] Furthermore, a rubber pad is provided on the bottom surface of the anti-detachment block.

[0018] Furthermore, notches are provided on both sides of the bottom surface of the outer shell to prevent the first inner shell / second inner shell from contacting the outer shell when the roller is clamped.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] Compared to existing technologies, this device uses a drive assembly to lift and lower the anti-detachment block, thereby limiting the position of the steel plate on the inner shell after the roller is clamped. If the lead screw of a certain lead screw assembly breaks, the anti-detachment block can limit the position of the steel plate, thus preventing the two inner shells from directly detaching from the outer shell. This significantly reduces safety hazards during the lifting and transportation of the roller. At the same time, the two sets of staggered clamping arms can effectively expand the clamping area of ​​the roller, resulting in better clamping effect for long rollers. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 for Figure 1 Enlarged view of section A (labeled A);

[0023] Figure 3 This is a schematic diagram of the outer casing;

[0024] Figure 4 This is a diagram illustrating the perforation process;

[0025] Figure 5 This is a schematic diagram showing the staggered distribution of the left and right lead screw assemblies;

[0026] Figure 6 This is a schematic diagram showing the fit between the second inner shell and the left lead screw assembly;

[0027] Figure label:

[0028] 1. Outer shell; 2. Lifting hole; 3. Mounting bracket; 4. Drive assembly; 5. Anti-detachment block; 6. Left lead screw assembly; 7. Right lead screw assembly; 8. First inner shell; 9. Second inner shell; 10. Steel plate; 11. Stepper motor; 12. Screw; 13. Telescopic rod; 14. Limiting plate; 15. Fixing plate; 16. Perforation; 17. Clamping arm; 18. Arc plate. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0030] like Figures 1 to 6 As shown, an anti-detachment mechanism for a crane lifting device includes a housing 1, a lifting hole 2, a mounting bracket 3, a drive assembly 4, an anti-detachment block 5, a left lead screw assembly 6, a right lead screw assembly 7, a first inner shell 8, a second inner shell 9, and a steel plate 10.

[0031] The lifting holes 2 are symmetrically opened on the outer casing 1;

[0032] Mounting bracket 3 is symmetrically welded onto housing 1, and a drive assembly 4 is provided on mounting bracket 3;

[0033] The anti-detachment block 5 is connected to a drive assembly 4 that makes it vertically rise and fall, and the anti-detachment block 5 moves along the lifting hole 2;

[0034] The left lead screw assembly 6 and the right lead screw assembly 7 are misaligned on the housing 1;

[0035] The first inner shell 8 is connected to the right lead screw assembly 7;

[0036] The second inner shell 9 is connected to the left lead screw assembly 6, and the second inner shell 9 and the first inner shell 8 move alternately.

[0037] Two steel plates 10 are welded to the first inner shell 8 and the second inner shell 9 respectively, and the two steel plates 10 are respectively matched with two anti-detachment blocks 5.

[0038] Further refinements of the embodiments of this utility model, such as... Figure 2As shown, the drive assembly 4 includes a stepper motor 11, a screw 12, a telescopic rod 13, a nut, and a limiting plate 14. The stepper motor 11 is fixed on the mounting frame 3. The stepper motor 11 is connected to the screw 12. The screw 12 is threadedly connected to the anti-detachment block 5. The end of the screw 12 is limited by a nut to a limiting plate 14 that contacts the anti-detachment block 5. The nut is shown in the figure but not labeled. The telescopic rod 13 is symmetrically fixed on the mounting frame 3 and connected to the anti-detachment block 5.

[0039] To ensure that the two inner shells can move horizontally inside the outer shell 1, the scheme is further refined as follows: Figure 3 and Figure 4 As shown, the outer shell 1 has fixed plates 15 welded on both sides, and two perforations 16 are staggered on the two fixed plates 15. The first inner shell 8 and the second inner shell 9 move along the two staggered perforations 16 respectively.

[0040] To ensure clamping stability during subsequent roller lifting and transfer processes, such as Figure 1 As shown, clamping arms 17 are welded to the bottom of the outer ends of the first inner shell 8 and the second inner shell 9, and an arc-shaped plate 18 that fits against the surface of the drum is welded to the clamping arms 17.

[0041] In a further optimization of the embodiment of this utility model, notches are provided on both sides of the bottom surface of the outer shell 1 to avoid the first inner shell 8 / second inner shell 9 from contacting the outer shell 1 when the roller is clamped. The notches are shown in the figure but are not labeled.

[0042] The working process of this utility model is as follows:

[0043] First, the overhead crane drives the lifting device to move above the drum and then descends. Once the lifting device is on both sides of the drum, the controller controls the left lead screw assembly 6 and the right lead screw assembly 7 to move sequentially or synchronously. This allows the drum to be clamped using the first inner shell 8, the second inner shell 9, the clamping arm 17, and the arc plate 18.

[0044] Before the roller is stably clamped, the controller controls the drive assembly 4 to move the anti-detachment block 5 upward so as not to obstruct the movement of the steel plate 10. When the arc plate 18 is in contact with and clamped to the surface of the roller, the position of the steel plate 10 is as shown in the attached instruction manual. Figure 2As shown, the steel plate 10 is located inside the anti-detachment block 5. Then, the controller controls the two sets of drive components 4 to operate synchronously, thereby realizing the downward movement of the anti-detachment block 5. When the two anti-detachment blocks 5 pass through the lifting hole 2 and come into contact with the surfaces of the first inner shell 8 and the second inner shell 9, the position of the steel plate 10 can be limited. If the lead screw assembly on one side breaks, the anti-detachment block 5 can limit the position of the steel plate 10 to prevent the steel plate 10 from detaching from the outer shell 1 along with the first inner shell 8 / second inner shell 9. Thus, the safety during the roller lifting and transfer process is significantly improved. At the same time, the clamping area can be effectively expanded by the staggered clamping arm 17, thereby improving the clamping effect on long rollers (i.e., expanding the distribution range of clamping points).

[0045] In order to increase the friction between the anti-detachment block 5 and the first inner shell 8 / second inner shell 9, and at the same time reduce the wear generated during the contact and limiting of the steel plate 10, in other embodiments, a rubber pad is provided on the bottom surface of the anti-detachment block 5, which is not shown in the figure.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fall-preventing mechanism for a crane spreader, characterized by, The utility model relates to a kind of steel plate clamping device, including shell (1), lifting hole (2), mounting bracket (3), drive assembly (4), anti-drop block (5), left screw assembly (6), right screw assembly (7), first inner shell (8), second inner shell (9) and steel plate (10), The lifting hole (2) is symmetrically provided on the shell (1); The mounting bracket (3) is symmetrically welded on the shell (1), and the drive assembly (4) is arranged on the mounting bracket (3); The anti-drop block (5) is connected with the drive assembly (4) for vertical lifting, and the anti-drop block (5) moves along the lifting hole (2); The left screw assembly (6) and the right screw assembly (7) are arranged on the shell (1) in a staggered manner; The first inner shell (8) is connected with the right screw assembly (7); The second inner shell (9) is connected with the left screw assembly (6), and the second inner shell (9) moves in an interlaced manner with the first inner shell (8); Two steel plates (10) are respectively welded on the first inner shell (8) and the second inner shell (9), and the two steel plates (10) are matched with the two anti-drop blocks (5).

2. The anti-drop mechanism for a crane sling according to claim 1, characterized in that, The drive assembly (4) includes a stepper motor (11), a screw rod (12), an extension rod (13), a nut and a limiting plate (14). The mounting bracket (3) is fixedly provided with the stepper motor (11). The stepper motor (11) is connected with the screw rod (12). The screw rod (12) is threadedly connected with the anti-drop block (5). The end of the screw rod (12) is limited by the nut to have the limiting plate (14) in contact with the anti-drop block (5). The extension rod (13) is symmetrically fixedly arranged on the mounting bracket (3) and connected with the anti-drop block (5).

3. The anti-drop mechanism for a crane sling according to claim 1, characterized in that, Two fixed plates (15) are welded on the two sides of the shell (1). Two perforations (16) are staggered arranged on the two fixed plates (15). The first inner shell (8) and the second inner shell (9) move along the two staggered perforations (16), respectively.

4. The anti-drop mechanism for a crane sling according to claim 1, characterized in that, Arc-shaped plates (18) are welded on the clamping arms (17) arranged on the outer side of the first inner shell (8) and the second inner shell (9).

5. The anti-drop mechanism for a crane spreader according to claim 1, characterized in that, The bottom surface of the anti-drop block (5) is provided with a rubber pad.

6. The anti-drop mechanism for a crane spreader according to claim 1, characterized by The bottom surface of the shell (1) is provided with notches on both sides to avoid the first inner shell (8) / second inner shell (9) from being in contact with the shell (1) when clamping the roller.

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