CN114684705A

CN114684705A - Anti-drop device for effectively preventing hook of travelling crane from being unhooked

Info

Publication number: CN114684705A
Application number: CN202210416010.8A
Authority: CN
Inventors: 张江龙; 李军; 张存宝; 罗荣辉; 王罡; 赵强; 江秋; 孙贵爱; 孟昭磊; 王晗
Original assignee: Yuxi Dahongshan Mining Co Ltd
Current assignee: Yuxi Dahongshan Mining Co Ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-07-01

Abstract

The invention discloses an anti-drop device for effectively preventing a crane hook from being unhooked, wherein the hook comprises a straight handle section and a hook section, and the tail end of the hook section is provided with a flange part; the straight handle section is equipped with the hinge hole, and in the hinge hole was located in the articulated shaft rotation, but anticreep board rear end was equipped with the draw-in groove of joint at the inboard of the lifting hook section of flange portion or joint in flange portion with the articulated shaft is fixed and the front end, and counterweight plate one end is fixed and the other end extends to lifting hook section rear side with articulated shaft or anticreep board, and the counterweight plate moment of torsion is greater than the moment of torsion of anticreep board. The anti-drop plate is hinged, the counterweight plate with larger torque is arranged, so that the clamping groove at the front end of the anti-drop plate and the flange part of the lifting hook form a normally closed structure, the anti-drop plate can automatically enter the lifting hook section through the self weight of the lifting sling when being installed into a lifting sling to form a closed anti-drop effect, and the clamping groove at the front end of the anti-drop plate can prevent the anti-drop plate from shaking left and right to reduce abrasion so that the lifting sling is difficult to drop out, so the anti-drop plate has the characteristics of simple structure, safety, reliability and convenience in use.

Description

Anti-drop device for effectively preventing hook of crane hook from being unhooked

Technical Field

The invention belongs to the technical field of hoisting equipment, and particularly relates to an anti-tripping device which is simple in structure, safe, reliable, convenient and fast to use and can effectively prevent a crane hook from being tripped.

Background

The travelling crane is commonly known as hoisting equipment, can realize vertical lifting or horizontal transfer of a heavy object hung on a lifting hook in space, and is widely applied to places such as production workshops and goods yards, so the hoisting safety of the travelling crane is a safety index which is emphasized by using enterprises. The crane is a mechanical device with intermittent action, and has the working characteristics that the crane is frequently started and braked, and the heavy objects on the lifting hook are easy to shake in the starting, braking and other processes, and in addition, the crane lifting hook is too fast to descend due to misoperation, equipment failure and the like, so that the sling in the lifting hook is easy to separate, the lifted heavy objects are easily damaged, the personal injury accident is possibly caused, and the great potential safety hazard exists. At present, in order to avoid the lifting rigging from falling off from the lifting hook of the crane, an anti-falling plate is generally additionally arranged at the root part of the lifting hook for preventing the lifting hook from falling off. However, when the anti-drop plate is installed in the sling, an operator needs to pull the anti-drop plate, and after the sling is installed, the anti-drop plate needs to be pulled again to form a closed state with the lifting hook, so that the anti-drop effect can be achieved, the operation process is complex, and potential safety hazards also exist in frequent operation of the operator under the sling. Therefore, the anti-drop plate and the inner side of the lifting hook form a normally closed state by additionally arranging the return spring in the anti-drop plate, the anti-drop plate can be pressed down by the self weight of the sling when the sling is installed into the lifting hook, and then the front end of the anti-drop plate abuts against the inner wall of the tail end of the lifting hook to form a relatively closed cavity under the action of spring tension after the anti-drop plate loses weight compression, so that the sling is prevented from dropping out of the lifting hook, the complex work of manually pulling and closing the anti-drop plate when the sling is installed is avoided, and the use safety is provided. However, due to reasons such as insufficient hardness and strength of materials and frequent operation, the anti-dropping plate often fails and deforms, so that the anti-dropping plate cannot be well attached to the inner wall of the lifting hook to lose anti-dropping performance, and the anti-dropping plate needs to be frequently replaced and corrected for maintenance, thereby increasing the maintenance workload and burying potential safety hazards. And ordinary anticreep board and spring anticreep board all need still to use the one hand to push down the anticreep board when the suspension rope utensil is changed, just can take out the suspension rope utensil from the lifting hook with the other hand, and the hand that pushes down the anticreep board at this moment is very easily damaged by the suspension rope utensil.

In the prior art, in order to solve the problem that above-mentioned anticreep board exists, also have through fixing the counter weight that extends behind the lifting hook on the anticreep board to realize the function of spring anticreep board, can not only avoid the spring inefficacy, also can open the anticreep board through the counter weight of lifting the rear end when the lifting rigging is changed moreover, thereby avoided the danger that the hand is collided with and damaged by the lifting rigging. However, because the front end of anticreep board is straight board for it forms the point contact with lifting hook tail end inner wall, and the contact point stress of anticreep board and lifting hook tail end inner wall is great, leads to the wearing and tearing aggravation of anticreep board, and the later maintenance work load is great and there is certain potential safety hazard. In addition, because the anti-drop plate is in point contact with the inner wall of the tail end of the lifting hook, when a crane is started or braked, a heavy object shakes, the sling can impact the anti-drop plate in the vertical and horizontal directions, and after the crane is used for a long time, the anti-drop plate is deformed due to left and right shaking along with the anti-drop plate, so that the anti-drop plate is easily separated from the side part of the lifting hook and is upwards popped out under the action of a spring or a counterweight, and the anti-drop effect is lost. In addition, no matter the conventional anti-drop plate, the spring anti-drop plate and the counterweight type anti-drop plate structure are adopted, the anti-drop plate is required to rotate and avoid in the lifting hook when the lifting rigging is installed, so that the space in the lifting hook is occupied, particularly the anti-drop plate is occupied at the opening position of the lifting hook, the thicker lifting rigging cannot be smoothly hooked or unhooked, and the use range of a travelling crane is limited; and the thicker sling is hung in the lifting hook and then is easy to clamp the anti-drop plate so that the anti-drop plate cannot reset and cannot play a role of anti-drop.

Disclosure of Invention

The invention aims to provide an anti-drop device which is simple in structure, safe, reliable, convenient and fast to use and can effectively prevent a travelling crane lifting hook from being unhooked.

The purpose of the invention is realized as follows: the lifting hook comprises a straight handle section and a lifting hook section, wherein the upper part of the lifting hook section is connected with the straight handle section, and a flange part is arranged at the tail end of the lifting hook section, which is far away from the straight handle section; still include articulated shaft, anticreep board, weight plate, straight handle section be provided with towards one side of couple section with lifting hook axis vertically hinge hole, the articulated shaft rotates to set up in the hinge hole, the rear end and the articulated shaft fixed connection of anticreep board, the front end of anticreep board is provided with can the joint in the inboard draw-in groove of couple section or joint in the flange portion inboard of flange portion below, weight plate one end and articulated shaft or anticreep board fixed connection and the other end extend to the rear side of couple section, the moment of torsion of weight plate is greater than the moment of torsion of anticreep board.

Compared with the prior art, the invention has the following beneficial effects:

1. the anti-drop plate is hinged, the counterweight plate with larger torque is arranged, so that the clamping groove at the front end of the anti-drop plate and the flange part of the lifting hook form a normally closed structure, the anti-drop plate can automatically enter the lifting hook section through the self weight of the lifting sling when the lifting sling is installed, the anti-drop plate automatically returns to form a closed anti-drop effect under the action of the counterweight plate, the application is convenient, the structural strength and the use durability of the anti-drop plate are better compared with those of a spring, and the danger that a hand is knocked and damaged by the lifting sling is avoided.

2. The clamping groove at the front end of the anti-falling plate can form at least two-point even line contact with the lifting hook section, and the contact surface is large, so that the stress of the contact point of the anti-falling plate is reduced, the abrasion is reduced, and the overhauling workload is effectively reduced; and the draw-in groove can also prevent that the anticreep board from rocking from side to side and further reducing wear and deformation for the lifting rope utensil is difficult to deviate from, makes its safe and reliable more.

3. According to the invention, the rotatable swivel mount is arranged on the straight handle section of the lifting hook, so that the anti-drop plate is hinged on the swivel mount, the anti-drop plate can horizontally rotate along with the swivel mount to give way to the opening position of the lifting hook when the lifting rigging is loaded and unloaded, the thicker lifting rigging can be smoothly hooked or unhooked, and the driving adaptability is improved; and the draw-in groove and the weight plate of cooperation anticreep board front end, when anticreep board locking anticreep state, the draw-in groove can rotate the level of anticreep board and form reliable restraint to can avoid the anticreep board to rock along with the lifting hook and control horizontal rotation and lose the mousing-hook effect.

In conclusion, the invention has the characteristics of simple structure, safety, reliability and convenient use.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention;

FIG. 2 is a second schematic view of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of the anti-separation plate structure of the present invention;

FIG. 5 is one of the cross-sectional views of FIG. 2;

FIG. 6 is a second cross-sectional view of FIG. 2;

in the figure: 1-hook, 101-straight handle section, 102-hook section, 103-flange section, 104-annular groove, 105-positioning hole, 2-articulated shaft, 3-anti-drop plate, 301-clamping groove, 4-counterweight plate, 5-swivel seat, 501-swivel seat, 502-guide block, 503-positioning pin, 504-spring, 505-stepped hole.

Detailed Description

The present invention is further described with reference to the following examples and accompanying drawings, but the present invention is not limited thereto in any way, and any modification or replacement made in accordance with the teachings of the present invention falls within the scope of the present invention.

As shown in fig. 1 to 6, the present invention comprises a hook 1, wherein the hook 1 comprises a straight handle section 101, and a hook section 102 connected with the straight handle section 101 at the upper part, and the end of the hook section 102 far away from the straight handle section 101 is provided with a flange part 103; still include articulated shaft 2, anticreep board 3, weight plate 4, straight handle section 101 is provided with towards one side of couple section 102 with 1 axis vertically hinge hole of lifting hook, articulated shaft 2 rotates and sets up in the hinge hole, the rear end and the articulated shaft 2 fixed connection of anticreep board 3, the front end of anticreep board 3 is provided with but the joint in the inboard draw-in groove 301 of couple section 102 of flange portion 103 below or joint in flange portion 103 inboard, weight plate 4 one end and articulated

shaft

2 or 3 fixed connection of anticreep board and the other end extend to the rear side of couple section 102, the moment of torsion of weight plate 4 is greater than the moment of torsion of anticreep board 3.

As shown in fig. 4, the locking groove 301 has a "C" -shaped, V-shaped or "u" -shaped groove structure, or a curved groove structure that fits the inside of the hook section 102 or the inside of the flange 103.

The anti-disengaging plate 3 and the counterweight plate 4 are of L-shaped or U-shaped structures, and the clamping groove 301 is formed in the outer side of the cross beam at the front end of the anti-disengaging plate 3.

As shown in fig. 2 and 3, the present invention further includes a rotary base 5 rotatably connected to the straight shank segment 101, and the hinge hole is provided on a hinge seat 501 on an outer wall of the rotary base 5.

An annular groove 104 is arranged on the straight handle section 101 of the lifting hook 1, and the rotary seat 5 is wholly or partially rotatably embedded in the annular groove 104.

As shown in fig. 5, the annular groove 104 is a partial groove with a rotation angle not less than 90 degrees, and one end of the partial groove extends to the inner side facing the flange 103, and a guide block 502 slidably embedded in the annular groove 104 is fixedly arranged on the inner wall of the swivel base 5.

As shown in fig. 6, the annular groove 104 is a circular groove, the rotary seat 5 is integrally and rotatably embedded in the annular groove 104, a positioning cavity 105 is arranged at the bottom of the annular groove 104 on the side facing the flange part 103, and an elastic positioning pin which can extend into the positioning cavity 105 is arranged at the back of the hinge seat 501 of the rotary seat 5.

The elastic positioning pin comprises a positioning pin 503 and a spring 504, a stepped hole 505 is formed in the back of the hinge seat 501, the positioning pin 503 is slidably arranged in a guide hole on the outer side of the stepped hole 505, one end of the positioning pin extends into a large hole on the inner side of the stepped hole 505, and the spring 504 is arranged in the large hole on the inner side of the stepped hole 505 and is abutted to the positioning pin 503.

The positioning pin 503 is provided with a convex edge with an outer diameter larger than that of the guide hole in the large hole at the inner side of the stepped hole 505, the spring 504 is sleeved on the positioning pin 503 in the large hole, and one end of the spring is abutted to the convex edge.

The end of the positioning pin 503, which is matched with the positioning hole, is provided with a hemispherical positioning head, and the diameter of the positioning head is not less than the diameter of the positioning hole 105.

The working principle and the working process of the invention are as follows:

as shown in fig. 2 to 5, one end of the anti-falling plate 3 is hinged to the swivel mount 5 through the hinge shaft 2, and the front end of the weight plate 4 is fixedly connected to the anti-falling plate 3 and extends to the rear side of the hook section 102, because the moment of the weight plate 4 relative to the hinge shaft 2 is greater than that of the anti-falling plate 3, under the self-weight of the weight plate 4, the anti-falling plate 3 automatically rotates upward around the hinge shaft 2 without any other external force, and the locking groove 301 at the front end thereof is locked with the inner side of the hook section 102 below the flange 103 or directly locked with the inner side of the flange 103, thereby forming a normally closed locking structure.

When a sling is installed, the sling is placed on the anti-drop plate 3 in the opening of the lifting hook 1, the anti-drop plate 3 overcomes the moment difference of the counterweight plate 4 under the action of the self weight of the sling, and the anti-drop plate 3 is pushed to rotate downwards around the hinged shaft 2, so that the sling on the anti-drop plate slides into the inner side of the lifting hook 1; then the anti-drop plate 3 loses external force and rotates upwards to return to a closed locking state under the action of the self weight of the counterweight plate 4. (for a thicker hoist, before the hoist is installed, the weight plate 4 may be manually lifted to separate the catching groove 301 at the front end of the anti-falling plate 3 from the flange 103 or the hook segment 102 by rotating the rotation base 5, the anti-falling plate 3 may be rotated to the side of the hook 1, the hoist may be placed in the hook 1, the rotation base 5 may be rotated again to rotate the anti-falling plate 3 to the inside of the hook 1, the weight plate 4 may be released, and the anti-falling plate 3 may be rotated upward by the weight of the weight plate 4 to catch the catching groove 301 with the flange 103 or the hook segment 102). When the sling is dismounted, the anti-drop plate 3 can rotate downwards to release the closed locking only by manually lifting the balance weight plate 4, and the sling can be taken out from the lifting hook 1 at the moment; (for thicker hoisting cable, the taking-out process is consistent with the loading process, and the counterweight plate 4 is lifted and the rotary seat 5 is rotated), after the hoisting cable is taken out, the counterweight plate 4 is loosened by hand, the counterweight plate 4 falls down and drives the anti-drop plate 3 to rotate upwards and return to the closing and locking state again, so that the anti-drop protection of the hoisting cable in the lifting hook 1 is realized.

Claims

1. The anti-drop device for effectively preventing the hook of the crane hook from being unhooked is characterized by comprising a hook (1), wherein the hook (1) comprises a straight handle section (101) and a hook section (102) the upper part of which is connected with the straight handle section (101), and the tail end, far away from the straight handle section (101), of the hook section (102) is provided with a flange part (103); its characterized in that still includes articulated shaft (2), anticreep board (3), weight plate (4), straight handle section (101) be provided with towards one side of lifting hook section (102) with lifting hook (1) axis vertically hinge hole, articulated shaft (2) rotate to set up in hinge hole, the rear end and articulated shaft (2) fixed connection of anticreep board (3), the front end of anticreep board (3) is provided with can joint at the inboard draw-in groove (301) of lifting hook section (102) of flange portion (103) below or can joint at flange portion (103) inboard, weight plate (4) one end and articulated shaft (2) or anticreep board (3) fixed connection and the other end extend to the rear side of lifting hook section (102), the moment of torsion of weight plate (4) is greater than the moment of torsion of anticreep board (3).

2. The anti-releasing device of claim 1, wherein the locking groove (301) is a "C" -shaped, a "V" -shaped or a "u" -shaped groove structure, or a curved groove structure engaging with the inside of the hooking section (102) or the inside of the flange (103).

3. The anti-separation device for effectively preventing the unhooking of a crane hook according to claim 2, wherein the anti-separation plate (3) and the counterweight plate (4) are of an L-shaped or U-shaped structure, and the locking groove (301) is arranged on the outer side of the beam at the front end of the anti-separation plate (3).

4. The drop preventer for effectively preventing the unhooking of a crane hook according to claim 1, 2 or 3, further comprising a rotary seat (5) rotatably connected to the straight shank section (101), wherein the hinge hole is formed in a hinge seat (501) formed in an outer wall of the rotary seat (5).

5. The anti-release device for effectively preventing the unhooking of a crane hook according to claim 4 is characterized in that the straight shank section (101) of the hook (1) is provided with an annular groove (104), and the rotary seat (5) is wholly or partially rotatably embedded in the annular groove (104).

6. The drop preventer as claimed in claim 5, wherein the annular groove (104) is a partial groove with a rotation angle of not less than 90 ° and has one end extending to the inner side facing the flange part (103), and the inner wall of the rotary seat (5) is fixedly provided with a guide block (502) slidably embedded in the annular groove (104).

7. The anti-drop device for effectively preventing the unhooking of the crane hook as claimed in claim 5, wherein the annular groove (104) is a circular groove, the rotary seat (5) is integrally and rotatably embedded in the annular groove (104), a positioning hole (105) is formed in the side of the bottom of the annular groove (104) facing the flange part (103), and the rotary seat (5) is provided with an elastic positioning pin which can extend into the positioning hole (105) at the back of the hinged seat (501).

8. The anti-release device for effectively preventing the unhooking of a crane hook according to claim 7, wherein the elastic positioning pin comprises a positioning pin (503) and a spring (504), a stepped hole (505) is formed in the back of the hinge seat (501), the positioning pin (503) is slidably disposed in the guide hole outside the stepped hole (505) and one end of the positioning pin extends into the large hole inside the stepped hole (505), and the spring (504) is disposed in the large hole inside the stepped hole (505) and abuts against the positioning pin (503).

9. The anti-drop device for effectively preventing the unhooking of the crane hook according to claim 8, wherein the positioning pin (503) is provided with a convex edge with an outer diameter larger than that of the guide hole in the large hole inside the stepped hole (505), the spring (504) is sleeved on the positioning pin (503) in the large hole, and one end of the convex edge abuts against the convex edge.

10. The anti-drop device for effectively preventing the unhooking of the crane hook according to claim 8, wherein the end of the positioning pin (503) which is matched with the positioning hole is provided with a hemispherical positioning head, and the diameter of the positioning head is not less than that of the positioning hole (105).