CN213622905U

CN213622905U - Unhooking prevention device of lifting hook

Info

Publication number: CN213622905U
Application number: CN202022511676.0U
Authority: CN
Inventors: 唐立
Original assignee: Foshan Yuehongfa Steel Co ltd
Current assignee: Foshan Yuehongfa Steel Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-07-06
Anticipated expiration: 2030-11-03

Abstract

The utility model discloses an anti-unhooking device of a lifting hook, which comprises a grid blocking piece and a first crank arm detachably connected with the grid blocking piece; the check piece comprises a second crank arm arranged opposite to the first crank arm, a limiting rod fixed at the head of the second crank arm, a rotating shaft fixed at the bending part of the second crank arm and a counterweight handle fixed at the tail part of the second crank arm; the limiting rod and the rotating shaft are positioned between the first crank arm and the second crank arm and are detachably connected with the first crank arm; the pivot is connected with the lifting hook rotation, the head and the gag lever post constitution of first crank arm and second crank arm are located the inboard anticreep frame of lifting hook. The anti-unhooking device provided by the utility model can detachably fix the grid blocking piece and the first crank arm on the lifting hook, thereby facilitating on-site rapid assembly and later disassembly and maintenance; in addition, the staff controls the counter weight handle in the outside of lifting hook, can control the hook mouth of lifting hook and open or seal, improves work efficiency.

Description

Unhooking prevention device of lifting hook

Technical Field

The utility model relates to a lifting hook technical field, in particular to unhook-proof device of lifting hook.

Background

A lifting hook is one of the most common lifting tools in lifting machinery, in particular a crown block device. The hoisted articles are hung into the lifting hook through the rigging and are lifted along with the lifting hook to realize article transfer. Because of the safety in production needs, for avoiding in the overhead traveling crane working process, the rigging roll-off caused the incident in the lifting hook, and the overhead traveling crane lifting hook must install mousing-hook device, and at present well-known overhead traveling crane lifting hook is for preventing that the rigging is not the landing, generally adopts standard spring card formula mousing-hook device, and the device relies on the elasticity of spring to guarantee the lifting hook opening shutting, but the device has following shortcoming: 1. the spring pole is damaged due to failure and is difficult to replace; 2. the rigging in the lifting hook is difficult to open when being taken out, and the hand is easy to be clamped to cause injury; 3. the spring clamping piece on the device needs to be pressed all the time, otherwise the detachment of the rigging is influenced; secondly, the mousing-hook device generally adopts the undetachable mode to fix on the lifting hook in actual device installation, is not convenient for dismantle the maintenance in the future.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide an anti-unhooking device for a hook, which solves the technical problems of the prior art that the hanging object is prevented from being detached and the hook is not convenient to be detached and maintained in the future.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an anti-unhooking device of a lifting hook comprises a grid blocking piece and a first crank arm detachably connected with the grid blocking piece; the check piece comprises a second crank arm arranged opposite to the first crank arm, a limiting rod fixed at the head of the second crank arm, a rotating shaft fixed at the bending part of the second crank arm and a counterweight handle fixed at the tail part of the second crank arm; the limiting rod and the rotating shaft are positioned between the first crank arm and the second crank arm and are detachably connected with the first crank arm; the rotating shaft is rotatably connected with the lifting hook, the heads of the first crank arm and the second crank arm and the limiting rod form an anti-falling frame positioned on the inner side of the lifting hook, and the counterweight handle drives the anti-falling frame to swing through gravity in a natural state, so that the anti-falling frame seals a hook opening of the lifting hook; the anti-falling frame is fixed through the positioning assembly to enable the hook opening of the lifting hook to be in an open state.

The first crank arm is provided with a through hole for the rotating shaft and the limiting rod to pass through, the free ends of the limiting rod and the rotating shaft are provided with threaded connectors, and each threaded connector passes through the corresponding through hole and is screwed into the nut.

The afterbody of second crank arm is provided with the connecting rod of being connected with first crank arm, the connecting rod can be dismantled with first crank arm and be connected.

The first crank arm, the limiting rod, the rotating shaft and the connecting rod are integrally formed.

The counterweight handle comprises a handle body with a mounting cavity and a plurality of counterweight blocks arranged in the mounting cavity of the handle body.

The handle body is L-shaped and consists of a vertical handle and a horizontal handle, and one end of the vertical handle is fixedly connected with the second crank arm; the other end of the vertical handle and the transverse handle are integrally formed, and the top of the transverse handle is provided with a hand holding grain.

The positioning assembly comprises a protrusion arranged on the lifting hook and a ferromagnetic body fixedly arranged on the first crank arm or the second crank arm, and the ferromagnetic body and the protrusion can generate magnetic attraction.

The first crank arm and the second crank arm are L-shaped.

Has the advantages that:

compared with the prior art, the unhooking prevention device provided by the utility model has the advantages that the grid blocking piece and the first crank arm are detachably fixed on the lifting hook, so that the on-site rapid assembly and the later disassembly and maintenance are convenient; in addition, the staff can push the counterweight handle to move upwards by hands outside the lifting hook, so that the hook opening of the control lifting hook can be opened, the operation position is safe, and the staff with small strength can also operate; the first crank arm and the second crank arm on the anti-falling frame can play a dual-check role in the rigging, and the use safety is enhanced.

Drawings

Fig. 1 is a perspective view of the unhooking prevention device of the lifting hook provided by the present invention in a use state.

Fig. 2 is a perspective view of the unhooking prevention device of the lifting hook according to the present invention in another use state.

Fig. 3 is an exploded view of the unhooking prevention device of the lifting hook according to the present invention.

Description of the main element symbols: 1-lattice blocking piece, 2-first crank arm, 11-second crank arm, 12-limiting rod, 13-rotating shaft, 3-counterweight handle, 4-lifting hook, 5-anti-falling frame, 111-through hole, 14-threaded connector, 15-nut, 16-positioning step, 17-connecting rod, 31-vertical handle, 32-horizontal handle, 33-hand holding grain, 6-positioning component, 61-ferromagnetic body and 62-protrusion.

Detailed Description

The utility model provides an mousing-hook device of lifting hook, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted to follow with the reference to the attached drawing the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

Referring to fig. 1-3, the present invention provides an anti-unhooking device for a hook, comprising a lattice stopper 1, and a first crank arm 2 detachably connected to the lattice stopper 1; the lattice stopper 1 comprises a second crank arm 11 arranged opposite to the first crank arm 2, a limiting rod 12 fixed at the head of the second crank arm 11, a rotating shaft 13 fixed at the bending part of the second crank arm 11 and a counterweight handle 3 fixed at the tail of the second crank arm 11; the limiting rod 12 and the rotating shaft 13 are positioned between the first crank arm 2 and the second crank arm 11 and are detachably connected with the first crank arm 2; the rotating shaft 13 is rotatably connected with the lifting hook 4, the heads of the first crank arm 2 and the second crank arm 11 and the limiting rod 12 form an anti-falling frame 5 positioned on the inner side of the lifting hook 4, and the counterweight handle 3 drives the anti-falling frame 5 to swing under a natural state through gravity, so that the anti-falling frame 5 seals a hook opening of the lifting hook 4; the anti-drop frame 5 is fixed by a positioning component 6 to enable the hook opening of the lifting hook 4 to be in an open state.

In practical application, the hook 4 is provided with a jack 41 in clearance fit with the rotating shaft 13, or welded with a sleeve in clearance fit with the rotating shaft 13, so that the first crank arm 2, the second crank arm 11 and the limiting rod 12 can freely rotate around the rotating shaft 13. First crank arm 2 and second crank arm 11 are the L type, and one end of first crank arm 2 and second crank arm 11 passes through gag lever post 12 to be connected, and another tip extends to the outside of lifting hook 4, and the setting of counter weight handle 3 is in the outside of lifting hook 4 promptly.

In a natural state, please refer to fig. 1, due to the gravity traction of the counterweight handle 3, the limiting rod 12 on the anti-falling frame 5 is pressed against the hook tip of the hook 4, so as to close the hook opening of the hook 4; when the hung object needs to be detached, please refer to fig. 2, the worker only needs to lift the counterweight handle 3 to drive the anti-falling frame 5 to rotate to the exposed part of the hook opening of the lifting hook 4, and then the handle can be loosened, at the moment, the positioning assembly 6 can automatically fix the lifting hook 4, the worker is prevented from holding the counterweight handle 3 for a long time when the hung object is detached, the physical power is saved, the detachment of the hung object is further facilitated, and the working efficiency is improved. When the next hanging object is to be hung by the hanging hook 4, the counterweight handle 3 is pulled down, and the hook opening of the hanging hook 4 can be closed again.

Compared with the prior art, the unhooking prevention device provided by the utility model has the advantages that the grid blocking part 1 and the first crank arm 2 are detachably fixed on the lifting hook 4, so that the on-site rapid assembly and the future disassembly and maintenance are convenient; in addition, the staff pushes the counterweight handle 3 to move upwards by hands outside the lifting hook 4, so that the opening of the lifting hook 4 can be controlled to be opened, the operation position is safe, and the staff with small strength can also operate; and the first crank arm 2 and the second crank arm 11 on the anti-falling frame 5 can play a double-check role in the rigging, thereby being beneficial to enhancing the use safety.

Specifically, be equipped with the through-hole 111 that supplies pivot 13 and gag lever post 12 to pass on the first crank arm 2, all be equipped with one section threaded connection head 14 on the free end of gag lever post 12 and pivot 13, the diameter of threaded connection head 14 is less than the diameter of gag lever post 12 and pivot 13 for all form the location step 16 to first crank arm 2 on gag lever post 12 and the pivot 13, every threaded connection head 14 passes in the corresponding through-hole 111 and twists nut 15, and nut 15 supports first crank arm 2 and presses on location step 16.

Preferably, the tail part of the second crank arm 11 is provided with a connecting rod 17 connected with the first crank arm 2, and the connecting rod 17 is detachably connected with the first crank arm 2. Through setting up connecting rod 17 and can improving overall structure intensity, improve the check of mousing-hook device to the rigging and keep off the performance. Here, the connecting rod 17 and the first crank arm 2 are connected in the same manner as the stopper rod 12 and the first crank arm 2, and the description thereof is omitted.

In order to reduce the number of parts of the unhooking prevention device and improve the assembly efficiency of the unhooking prevention device, the first crank arm 2, the limiting rod 12, the rotating shaft 13 and the connecting rod 17 are integrally formed.

In this embodiment, the handle 3 includes a handle body having a mounting cavity, and a plurality of weights (not visible) disposed in the mounting cavity of the handle body. In a natural state, due to the gravity of the balancing weight, the limiting rod 12 generates a motion trend of swinging towards the hook tip part of the lifting hook 4, so that the limiting rod 12 is pressed against the hook tip part of the lifting hook 4, and the hook opening of the lifting hook is closed; the worker changes the position of the anti-drop frame 5 by pulling the handle body, thereby switching between closing and opening the hook opening of the hook 4.

Preferably, as shown in fig. 1, the handle body is L-shaped and comprises a vertical handle 31 and a horizontal handle 32, and one end of the vertical handle 31 is fixedly connected with the second crank arm 11; the other end of the vertical handle 31 and the horizontal handle 32 are integrally formed, the handle body can be made of plastics, and the balancing weight is wrapped in the horizontal handle 32 to prevent the balancing weight from being damaged due to collision in the using process. In addition, the top of horizontal handle 32 is equipped with hand holding line 33, and hand holding line 33 can improve the comfort level that the staff carried and pulled counter weight handle 3 with the shape looks adaptation of staff.

Preferably, referring to fig. 1 and 2, the positioning assembly 6 includes a protrusion 62 disposed on the hook 4 and a ferromagnetic body 61 fixedly disposed on the first crank arm 2 or the second crank arm 11, the ferromagnetic body 61 is capable of magnetically attracting the protrusion 62, that is, the protrusion 62 is made of a material capable of being magnetically attracted, and the protrusion 62 may be configured as an iron rod. It should be understood that magnetic attraction between the protrusion 62 and the ferromagnet 61 is greater than traction force of the counterweight, so that after the protrusion 62 and the ferromagnet 61 are attracted, the anti-falling frame 5 swings to a position far away from the hook point of the lifting hook 4, under the action of no external force, the anti-falling frame 5 can be fixed, the lifting hook 4 is in an open state for a long time, a worker is prevented from holding the counterweight handle 3 for a long time when the suspended object is detached, physical power is saved, detachment of the suspended object is further facilitated, and working efficiency is improved. After the staff pulled down counter weight handle 3, protruding 62 and ferromagnet 61 separation, under the action of gravity of balancing weight, gag lever post 12 on anti-disengaging frame 5 supported again and pressed on the hook point of lifting hook 4 to seal the hook mouth of lifting hook 4, guarantee the security of hoist and mount.

It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.

Claims

1. An unhooking prevention device of a lifting hook is characterized by comprising a grid blocking piece and a first crank arm detachably connected with the grid blocking piece; the check piece comprises a second crank arm arranged opposite to the first crank arm, a limiting rod fixed at the head of the second crank arm, a rotating shaft fixed at the bending part of the second crank arm and a counterweight handle fixed at the tail part of the second crank arm; the limiting rod and the rotating shaft are positioned between the first crank arm and the second crank arm and are detachably connected with the first crank arm; the rotating shaft is rotatably connected with the lifting hook, the heads of the first crank arm and the second crank arm and the limiting rod form an anti-falling frame positioned on the inner side of the lifting hook, and the counterweight handle drives the anti-falling frame to swing through gravity in a natural state, so that the anti-falling frame seals a hook opening of the lifting hook; the anti-falling frame is fixed through the positioning assembly to enable the hook opening of the lifting hook to be in an open state.

2. The unhooking prevention device of a lifting hook according to claim 1, wherein the first crank arm is provided with through holes for the rotating shaft and the limiting rod to pass through, the free ends of the limiting rod and the rotating shaft are provided with threaded connectors, and each threaded connector passes through a corresponding through hole and is screwed into a nut.

3. The unhooking prevention device of a lifting hook as claimed in claim 2, wherein the tail part of the second crank arm is provided with a connecting rod connected with the first crank arm, and the connecting rod is detachably connected with the first crank arm.

4. The unhooking prevention device of a lifting hook according to claim 3, wherein the first crank arm, the stopper rod, the rotating shaft and the connecting rod are integrally formed.

5. The unhooking prevention device of a lifting hook according to claim 1, wherein the counterweight handle comprises a handle body with a mounting cavity, and a plurality of counterweights arranged in the handle body mounting cavity.

6. The unhooking prevention device of a lifting hook as claimed in claim 5, wherein the handle body is L-shaped and comprises a vertical handle and a horizontal handle, and one end of the vertical handle is fixedly connected with the second crank arm; the other end of the vertical handle and the transverse handle are integrally formed, and the top of the transverse handle is provided with a hand holding grain.

7. The unhooking prevention device of a lifting hook according to claim 1, wherein the positioning component comprises a protrusion arranged on the lifting hook and a ferromagnetic body fixedly arranged on the first crank arm or the second crank arm, and the ferromagnetic body can magnetically attract the protrusion.

8. The unhooking prevention device of a lifting hook as claimed in claim 1, wherein the first and second crank arms are L-shaped.