Lifting hook anti-falling device for crane

Abstract

The utility model discloses a lifting hook anti-falling device for a crane, which relates to the technical field of cranes and comprises a top plate, a steel wire rope is fixedly connected to the lower surface of the top plate, a fixed pulley is movably connected to the outer side surface of the lower part of the steel wire rope, and a first fixed shaft is movably connected to the inner side surface of the fixed pulley; pulley boxes are welded to the two ends of the first fixed shaft, a lifting hook is welded to the middle of the lower portion of each pulley box, and a buffering box is welded to the lower portion of the top plate. According to the lifting hook, the buffer plate is arranged, so that a fourth spring can be stretched, and meanwhile, a first spring is compressed by utilizing a connecting rod and a sliding block, so that the equipment is buffered when the lifting hook rushes to the top, the impact force generated when the lifting hook rushes to the top is weakened, and the equipment is prevented from being damaged by the impact force generated when the lifting hook rushes to the top; the lifting hook can be prevented from falling through the anti-falling frame when the lifting hook rushes to the top, potential safety hazards are avoided, and safety protection of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a hook anti-falling device for cranes. Background Art

[0002] A crane refers to a multi-action lifting machinery that vertically lifts and horizontally transports heavy objects within a certain range. It is also called an overhead crane, an overhead crane, or a hoist. Cranes are often used in conjunction with hooks. When the hook is in use, operating errors may occur, the height limiter may fail, and the wire rope may be broken due to the hook hitting the top. The hook or the hoisted cargo may fall from a height together, which may cause a major safety accident. If a safety accident occurs, there will be significant economic losses, so a fall-prevention device needs to be installed to protect the hook.

[0003] A hook anti-fall device for a crane disclosed in the Chinese utility model patent application disclosure CN213085212U, although the utility model can perform multiple reinforcements on the hook, but the utility model does not provide buffering when the hook hits the top, and the impact force of the hook hitting the top is likely to cause damage to the crane, so there is a problem of no buffering, and after the hook hits the top, the wire rope breaks, causing the hook to fall, and no anti-fall mechanism is set, which poses a safety hazard, so there is a problem of no anti-fall mechanism. In summary, the utility model has the problems of no buffering and no anti-fall mechanism. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a hook anti-falling device for a crane, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented by the following technical scheme: comprising a top plate, a steel wire rope is fixedly connected to the bottom of the top plate, a fixed pulley is movably connected to the lower outer side of the steel wire rope, a first fixed shaft is movably connected to the inner side of the fixed pulley, a pulley box is welded to both ends of the first fixed shaft, and a hook is welded to the middle of the bottom of the pulley box;

[0008] A buffer box is welded under the top plate, a front inner side surface of the buffer box is movably connected to a door panel, a rear side surface of the door panel is movably connected to a buffer plate, a rear side surface of the door panel is movably connected to a movable plate, a sliding rod is welded on the upper part of the left and right side surfaces of the inner wall of the buffer box, a sliding block is slidably connected to the outer side surface of the sliding rod, a second fixed shaft is fixedly connected to the lower inner side surface of the sliding block, a connecting rod is movably connected to the outer side surface of the second fixed shaft, the front and rear side surfaces of the connecting rod abut against the sliding block, the front and rear side surfaces of the lower part of the connecting rod abut against the buffer plate, and a fixed plate is welded in the middle of the left and right side surfaces of the inner wall of the buffer box;

[0009] The inner side of the fixed plate is movably connected with a movable plate, and the front and rear sides of the movable plate are slidably connected to the front and rear sides of the inner wall of the buffer box; the lower left part of the movable plate abuts against the first vertical plate, and the lower part of the first vertical plate is welded to the buffer box; the lower right part of the movable plate abuts against the second vertical plate, and the lower part of the second vertical plate is welded to the buffer box; the lower part of the left side of the inner wall of the buffer box is fixedly connected with a third spring, and the other end of the third spring is fixedly connected with a clamping plate, the left outer side of the clamping plate is fixedly connected with a retaining ring, the upper and lower sides of the right part of the clamping plate are slidably connected to the first vertical plate, and an anti-fall frame is welded to the middle of the upper part of the pulley box.

[0010] Optionally, a first spring is fixedly connected to the outer side surface of the sliding block, the other end of the first spring is fixedly connected to the buffer box, and the outer side surfaces at both ends of the sliding rod are sleeved with the first spring.

[0011] Optionally, the outer side surface of the buffer plate slides on the inner side surface of the buffer box, and the middle inner side surface of the buffer plate is fixedly connected to the second fixed shaft.

[0012] Optionally, a fourth spring is fixedly connected to the upper surface of the fixing plate, and the other end of the fourth spring is fixedly connected to the buffer plate.

[0013] Optionally, a first card slot is opened on the right side of the card plate, a first card rod is clamped on the left side of the inner wall of the first card slot, the upper end of the first card rod is welded to the movable plate, and the right side of the first card rod is movably connected to the first vertical plate.

[0014] Optionally, a second slot is provided at the bottom of the second vertical plate, a stopper is movably connected to the middle inner side surface of the second vertical plate, a second clamping rod is slidably connected to the upper inner side surface of the second vertical plate, and the bottom of the second clamping rod abuts against the stopper.

[0015] (III) Beneficial effects

[0016] The utility model provides a hook anti-falling device for a crane, which has the following beneficial effects:

[0017] 1. The hook anti-fall device for a crane can stretch the fourth spring by setting a buffer plate, and compress the first spring by using the connecting rod and the slider, so as to buffer the device when the hook hits the top, reduce the impact force when the hook hits the top, and prevent the impact force when the hook hits the top from causing damage to the device.

[0018] 2. The hook anti-fall device for the crane can prevent the hook from falling through the anti-fall frame when the hook hits the top by setting a clamping plate, thereby avoiding safety hazards and increasing the safety protection of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model when viewed from above;

[0021] Figure 3 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0022] Figure 4 This is a schematic diagram of an enlarged front cross-sectional structure of the buffer box of the utility model;

[0023] Figure 5 For this utility model Figure 4 The enlarged structural diagram at A in the middle;

[0024] Figure 6 It is a schematic diagram of the left-side sectional structure of the utility model.

[0025] In the figure: 1, top plate; 2, buffer box; 3, wire rope; 4, anti-fall frame; 5, pulley box; 6, hook; 7, fixed pulley; 8, first slot; 9, first clamping rod; 10, first fixed axis; 11, connecting rod; 12, second fixed axis; 13, slider; 14, slide rod; 15, first spring; 16, buffer plate; 17, fixed plate; 18, movable plate; 19, second clamping rod; 20, block; 21, second slot; 22, first vertical plate; 23, clamping plate; 24, retaining ring; 25, third spring; 26, fourth spring; 27, second vertical plate; 28, door panel. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Example 1

[0028] See also Figures 1 to 6The utility model provides a technical solution: a hook anti-fall device for a crane, comprising a top plate 1, a steel wire rope 3 is fixedly connected to the bottom of the top plate 1, a fixed pulley 7 is movably connected to the lower outer side of the steel wire rope 3, a first fixed shaft 10 is movably connected to the inner side of the fixed pulley 7, a pulley box 5 is welded to both ends of the first fixed shaft 10, and a hook 6 is welded to the middle of the bottom of the pulley box 5;

[0029] A buffer box 2 is welded to the bottom of the top plate 1, a door panel 28 is movably connected to the front inner side surface of the buffer box 2, a buffer plate 16 is movably connected to the rear side surface of the door panel 28, and a movable plate 18 is movably connected to the rear side surface of the door panel 28, slide bars 14 are welded to the upper left and right sides of the inner wall of the buffer box 2, a slider 13 is slidably connected to the outer side surface of the slide bar 14, a first spring 15 is fixedly connected to the outer side surface of the slider 13, the other end of the first spring 15 is fixedly connected to the buffer box 2, the outer side surfaces of both ends of the slide bar 14 are sleeved with the first spring 15, the lower inner side surface of the slider 13 is fixedly connected to the second fixed shaft 12, the outer side surface of the second fixed shaft 12 is movably connected to the connecting rod 11, and the front and rear sides of the connecting rod 11 are fixedly connected to the second fixed shaft 12. The side surface abuts against the slider 13, and the front and rear side surfaces of the lower part of the connecting rod 11 abut against a buffer plate 16, and the outer side surface of the buffer plate 16 slides on the inner side surface of the buffer box 2, and the middle inner side surface of the buffer plate 16 is fixedly connected to the second fixed axis 12, and a fixing plate 17 is welded in the middle of the left and right sides of the inner wall of the buffer box 2, and a fourth spring 26 is fixedly connected to the top of the fixing plate 17, and the other end of the fourth spring 26 is fixedly connected to the buffer plate 16. By setting the buffer plate 16, the fourth spring 26 can be stretched, and the first spring 15 is compressed by the connecting rod 11 and the slider 13, so as to buffer the equipment when the hook 6 hits the top, reduce the impact force when the hook 6 hits the top, and prevent the impact force when the hook 6 hits the top from causing damage to the equipment.

[0030] During use, when the crane equipment fails or the operation error causes the crane to rush upward, the anti-fall frame 4 enters the buffer box 2, and the anti-fall frame 4 continues to move upward to lift the movable plate 18, and the movable plate 18 moves upward to contact the buffer plate 16, and drives the buffer plate 16 to move upward, and then the buffer plate 16 stretches the fourth spring 26. At the same time, the buffer plate 16 moves upward to cause the connecting rod 11 to rotate around the second fixed axis 12, and then the connecting rod 11 causes the slider 13 to move to the left and right, so that the slider 13 slides on the slide rod 14 and compresses the first spring 15.

[0031] Example 2

[0032] See also Figures 1 to 6The utility model provides a technical solution: a hook anti-fall device for a crane, comprising a top plate 1, a steel wire rope 3 is fixedly connected to the bottom of the top plate 1, a fixed pulley 7 is movably connected to the lower outer side of the steel wire rope 3, a first fixed shaft 10 is movably connected to the inner side of the fixed pulley 7, a pulley box 5 is welded to both ends of the first fixed shaft 10, and a hook 6 is welded to the middle of the bottom of the pulley box 5;

[0033] The inner side of the fixed plate 17 is movably connected with a movable plate 18, and the front and rear sides of the movable plate 18 are slidably connected with the front and rear sides of the inner wall of the buffer box 2. The lower side of the movable plate 18 abuts against the first vertical plate 22, and the lower side of the first vertical plate 22 is welded to the buffer box 2. The lower right part of the movable plate 18 abuts against the second vertical plate 27, and the lower side of the second vertical plate 27 is welded to the buffer box 2. The lower part of the left side of the inner wall of the buffer box 2 is fixedly connected with a third spring 25, and the other end of the third spring 25 is fixedly connected with a clamping plate 23. The right part of the clamping plate 23 is provided with a first clamping groove 8, and the left side of the inner wall of the first clamping groove 8 is clamped with a first clamping rod 9, and the upper end of the first clamping rod 9 is fixed to the movable plate 18. The right side of the first clamping rod 9 is movably connected to the first vertical plate 22, the left outer side surface of the clamping plate 23 is fixedly connected with a retaining ring 24, the upper and lower side surfaces of the right part of the clamping plate 23 are slidably connected to the first vertical plate 22, a second clamping groove 21 is provided at the lower part of the second vertical plate 27, a stopper 20 is movably connected to the middle inner side surface of the second vertical plate 27, a second clamping rod 19 is slidably connected to the upper inner side surface of the second vertical plate 27, the lower side of the second clamping rod 19 abuts against the stopper 20, an anti-fall frame 4 is welded in the middle of the upper part of the pulley box 5, by setting the clamping plate 23, the anti-fall frame 4 can prevent the hook 6 from falling when the hook 6 hits the top, thereby avoiding safety hazards and increasing the safety protection of the equipment.

[0034] When in use, when the anti-fall frame 4 pushes the movable plate 18 to move upward, the movable plate 18 drives the first clamping rod 9 to move upward at the same time, so that the first clamping rod 9 leaves the first clamping groove 8, and then the third spring 25 begins to stretch, pushing the clamping plate 23 to move rightward and enter the anti-fall frame 4. When the clamping plate 23 contacts the stopper 20, the clamping plate 23 pushes the stopper 20 to the right, so that the stopper 20 leaves the second vertical plate 27. When the retaining ring 24 contacts the first vertical plate 22, the second clamping rod 19 falls downward through the first clamping groove 8 into the second clamping groove 21, so that the second clamping rod 19 is clamped with the second clamping groove 21 to fix the clamping plate 23. The clamping plate 23 prevents the hook 6 from falling after hitting the top inside the anti-fall frame 4. After a top-hitting accident occurs, the maintenance personnel should immediately repair the wire rope 3 and the buffer The box 2 is checked. If the wire rope 3 is damaged, it is necessary to replace the wire rope 3, and then check the buffer box 2 to check the degree of damage to the buffer box 2 caused by the hook 6. If the buffer box 2 can still be used, open the door panel 28, lower the hook 6 again, and have the maintenance personnel pull up the second card rod 19 to make the second card rod 19 leave the second card slot 21 and return to its original position, then pull the card plate 23 to the left to compress the third spring 25 to make the card plate 23 leave the second vertical plate 27, put the stop block 20 back to its original position, and then pull the card plate 23 back to its original position, place the first card rod 9 and the movable plate 18 to fix the card plate 23. If the buffer box 2 is seriously damaged and cannot be used, the buffer box 2 is replaced by the maintenance personnel, and the wire rope 3 and the hook 6 are re-laid.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hook fall prevention device for a crane, comprising a top plate (1), characterized in that: A steel wire rope (3) is fixedly connected to the bottom of the top plate (1); a fixed pulley (7) is movably connected to the lower outer side of the steel wire rope (3); a first fixed shaft (10) is movably connected to the inner side of the fixed pulley (7); pulley boxes (5) are welded to both ends of the first fixed shaft (10); and a hook (6) is welded to the middle of the bottom of the pulley box (5); A buffer box (2) is welded to the bottom of the top plate (1); a door panel (28) is movably connected to the front inner side surface of the buffer box (2); a buffer plate (16) is movably connected to the rear side surface of the door panel (28); a movable plate (18) is movably connected to the rear side surface of the door panel (28); a slide bar (14) is welded to the upper part of the left and right side surfaces of the inner wall of the buffer box (2); a slider (13) is slidably connected to the outer side surface of the slide bar (14); a second fixed shaft (12) is fixedly connected to the lower inner side surface of the slider (13); a connecting rod (11) is movably connected to the outer side surface of the second fixed shaft (12); the front and rear side surfaces of the connecting rod (11) are in contact with the slider (13); the front and rear side surfaces of the lower front and rear side surfaces of the connecting rod (11) are in contact with the buffer plate (16); a fixed plate (17) is welded to the middle of the left and right side surfaces of the inner wall of the buffer box (2); The inner side surface of the fixed plate (17) is movably connected to a movable plate (18), and the front and rear side surfaces of the movable plate (18) are slidably connected to the front and rear side surfaces of the inner wall of the buffer box (2). The lower left portion of the movable plate (18) abuts against a first vertical plate (22), and the lower portion of the first vertical plate (22) is welded to the buffer box (2). The lower right portion of the movable plate (18) abuts against a second vertical plate (27), and the lower portion of the second vertical plate (27) is welded to the buffer box (2). A third spring (25) is fixedly connected to the lower portion of the left side surface of the inner wall of the buffer box (2), and the other end of the third spring (25) is fixedly connected to a clamping plate (23). The outer side surface of the left portion of the clamping plate (23) is fixedly connected to a retaining ring (24), and the upper and lower side surfaces of the right portion of the clamping plate (23) are slidably connected to the first vertical plate (22). An anti-fall frame (4) is welded to the middle of the upper portion of the pulley box (5).

2. The hook anti-fall device for a crane according to claim 1, characterized in that: The outer side surface of the sliding block (13) is fixedly connected to a first spring (15), the other end of the first spring (15) is fixedly connected to the buffer box (2), and the outer side surfaces at both ends of the sliding rod (14) are sleeved with the first spring (15).

3. The hook anti-falling device for a crane according to claim 1, characterized in that: The outer side surface of the buffer plate (16) slides on the inner side surface of the buffer box (2), and the middle inner side surface of the buffer plate (16) is fixedly connected to the second fixed shaft (12).

4. The hook anti-falling device for a crane according to claim 1, characterized in that: A fourth spring (26) is fixedly connected to the upper surface of the fixing plate (17), and the other end of the fourth spring (26) is fixedly connected to the buffer plate (16).

5. The hook anti-falling device for a crane according to claim 1, characterized in that: A first clamping groove (8) is provided on the right side of the clamping plate (23); a first clamping rod (9) is clamped on the left side of the inner wall of the first clamping groove (8); the upper end of the first clamping rod (9) is welded to the movable plate (18); and the right side of the first clamping rod (9) is movably connected to the first vertical plate (22).

6. The hook anti-falling device for a crane according to claim 1, characterized in that: A second clamping groove (21) is provided at the lower portion of the second vertical plate (27); a stopper (20) is movably connected to the middle inner side surface of the second vertical plate (27); a second clamping rod (19) is slidably connected to the upper inner side surface of the second vertical plate (27); and the lower portion of the second clamping rod (19) abuts against the stopper (20).

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