CN211444771U - Lifting hook protection device of forklift lifting appliance - Google Patents

Abstract

The utility model discloses a lifting hook protection device of fork truck hoist, it is installed on the hoist, its characterized in that: lifting hook protection device includes interlock wheel and protection rope, the interlock wheel with the winding up wheel size of hoist engine, structure are the same, the interlock wheel rotates to be installed the arm head end of flexible davit, the interlock wheel with the synchronous rotation of winding up wheel of hoist engine, the one end of protection rope is fixed on the outer periphery of interlock wheel, and its other end walk around behind the outer periphery of interlock wheel with lifting hook fixed connection, the utility model discloses the advantage compared with prior art lies in: the protection rope can effectively avoid the falling of the broken rear lifting hook of the steel wire rope and goods on the lifting hook, so that the safety factor of the lifting appliance in use is greatly improved, the protection rope realizes transmission through the linkage wheel and the winding wheel of the winch, the protection rope and the steel wire rope are loosened and stored synchronously, the protection rope is guaranteed to be in a proper loosening state all the time, and the protection effect is good.

Description

Lifting hook protection device of forklift lifting appliance

Technical Field

The utility model relates to a lifting device technical field specifically indicates a lifting hook protection device of fork truck hoist.

Background

The crane is a lifting mechanical vehicle capable of loading, unloading and lifting goods in a long distance, but is not suitable for a smaller operation field, has poor flexibility, is a forklift, the lifting appliance on the forklift is provided with a telescopic suspension arm, a winch, a lifting hook and other parts, wherein the lifting hook is driven by the hoist to lift, the hoist is matched with the telescopic boom and the forklift, so that the position of the goods is moved more conveniently and flexibly when the goods are lifted, but also has certain safety problem in use, the transmission between the winch and the lifting hook is realized through a steel wire rope, meanwhile, the load bearing of the lifting hook and the goods on the telescopic boom is realized by the steel wire rope, and steel wire rope can constantly wear and tear when hoist and mount goods, if steel wire rope takes place the fracture when hoist and mount goods, then the goods damages light, then endangers staff's safety heavy. There is a need for improvement.

Disclosure of Invention

The utility model provides a lifting hook protection device of fork truck hoist, it can solve the technical problem that lifting hook department has the potential safety hazard in the hoist.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is: the utility model provides a lifting hook protection device of fork truck hoist, its installs on the hoist, the hoist has flexible davit, hoist engine, lifting hook, flexible davit is installed on fork frame of fork truck, the hoist engine reaches the lifting hook is all installed the arm head end of flexible davit, the hoist engine with the lifting hook passes through wire rope transmission and is connected, and lifting hook protection device includes interlocking wheel and protection rope, the interlocking wheel with the reel size, the structure of hoist engine are the same, the interlocking wheel rotates to be installed the arm head end of flexible davit, the interlocking wheel with the reel synchronous rotation of hoist engine, the one end of protection rope is fixed on the outer periphery of interlocking wheel, and its other end walk around behind the outer periphery of interlocking wheel with lifting hook fixed connection.

The winding wheel of the winch is coaxially fixed with a first chain wheel, the linkage wheel is coaxially fixed with a second chain wheel, and the first chain wheel and the second chain wheel are identical in size and structure and are in transmission connection through a chain.

Still include tension sensor, PLC controller and audible-visual annunciator, the protection rope comprises rope one and rope two, the one end of rope one with interlock wheel fixed connection, and its other end with tension sensor's a sense terminal fixed connection, the one end of rope two with another sense terminal fixed connection of tension sensor, and its other end with lifting hook fixed connection, PLC controller and audible-visual annunciator are all fixed telescopic boom's arm head end, just the PLC controller respectively with audible-visual annunciator reaches the tension sensor electricity is connected.

After the structure is adopted, compared with the prior art, the utility model the advantage that has is: the utility model provides a lifting hook protection device of fork truck hoist has included parts such as interlock wheel, protection rope, can effectively avoid dropping of wire rope fracture back lifting hook and goods on it through the protection rope, makes hoist in use's factor of safety promote greatly, and the protection rope realizes the transmission through the reel of interlock wheel with the hoist engine, makes loosening and accomodating of protection rope and wire rope synchronous all, guarantees that the protection rope can be in suitable lax state all the time, and the protection is effectual.

Drawings

Fig. 1 is the local structure schematic diagram of the utility model relates to a lifting hook protection device of fork truck hoist when installing on fork truck.

Fig. 2 is the overall structure schematic diagram of the utility model relates to a lifting hook protection device of fork truck hoist when installing on fork truck.

As shown in the figure: 1. the device comprises a telescopic suspension arm, 2, a winch, 3, a lifting hook, 4, a linkage wheel, 5, a protection rope, 6, a first chain wheel, 7, a second chain wheel, 8, a tension sensor, 9, a PLC (programmable logic controller), 10, an audible and visual alarm, 11, a first rope, 12 and a second rope.

Detailed Description

The following description is only for the preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, the present invention will be further explained with reference to the drawings and the embodiments.

Examples, see fig. 1-2:

a lifting hook protection device of a forklift lifting appliance is arranged on the lifting appliance, the lifting appliance is provided with a telescopic suspension arm 1, a winch 2 and a lifting hook 3, the telescopic suspension arm 1 is arranged on a fork frame of a forklift, the telescopic suspension arm 1 can rotate up and down on the forklift under the drive of a hydraulic oil cylinder, the telescopic suspension arm 1 is composed of a plurality of suspension arms which are sequentially sleeved in a sliding mode from outside to inside, the head end of the telescopic suspension arm 1 is the front end of the innermost suspension arm, the winch 2 and the lifting hook 3 are both arranged at the head end of the telescopic suspension arm 1, the winch 2 is provided with a driving part, a steel wire rope and a winding wheel, the lifting hook 3 is arranged on the telescopic suspension arm 1 through the steel wire rope, a steering wheel is rotatably arranged at the head end of the telescopic suspension arm 1, a winding and unwinding wheel is rotatably arranged on the lifting hook, one end of the steel wire rope is fixed on the, the hoisting machine 2 is connected with the lifting hook 3 through a steel wire rope in a transmission way, a driving part of the hoisting machine 2 drives a winding wheel to rotate so as to wind and unwind the steel wire rope, when the hoisting machine 2 stores the steel wire rope, the lifting hook 3 moves towards the telescopic suspension arm 1, when the hoisting machine 2 loosens the steel wire rope, the lifting hook 3 moves away from the telescopic suspension arm 1, the lifting hook protecting device comprises a linkage wheel 4 and a protecting rope 5, the linkage wheel 4 and the winding wheel of the hoisting machine 2 are the same in size and structure, the linkage wheel 4 is rotatably arranged at the arm head end of the telescopic suspension arm 1, the linkage wheel 4 is arranged at the arm head end of the telescopic suspension arm 1 through a bearing, the axial direction of the rotating shaft of the linkage wheel 4 is parallel to the axial direction of the rotating shaft of the winding wheel of the hoisting machine 2, the linkage wheel 4 and the winding wheel of the hoisting machine 2 rotate synchronously, further, a first chain wheel 6 is coaxially fixed on a winding wheel of the winch 2, a central shaft of the first chain wheel 6 is located on a central shaft of the winding wheel of the winch 2, the first chain wheel 6 and the winding wheel of the winch 2 rotate synchronously, a second chain wheel 7 is coaxially fixed on the linkage wheel 4, the central shaft of the second chain wheel 7 is located on the central shaft of the linkage wheel 4, the second chain wheel 7 and the linkage wheel 4 rotate synchronously, the first chain wheel 6 and the second chain wheel 7 are identical in size and structure and are connected through chain transmission, a chain is respectively meshed with the first chain wheel 6 and the second chain wheel 7, and the first chain wheel 6 drives the second chain wheel 7 to rotate synchronously through the chain. One end of the protection rope 5 is fixed on the outer circumferential surface of the linkage wheel 4, the other end of the protection rope is fixedly connected with the lifting hook 3 after bypassing the outer circumferential surface of the linkage wheel 4, the protection rope 5 does not play a role in bearing the lifting hook 3 in the normal movement of the lifting hook 3 and is always in a loose state, the linkage wheel 4 rotates to loosen or store the protection rope 5, the winding wheel of the winch 2 drives the lifting hook 3 to move through the steel wire rope, and the winding wheel of the winch 2 also drives the linkage wheel 4 to rotate, so the protection rope 5 can be always in a loose state, and after the steel wire rope is broken, the protection rope 5 plays a role in bearing the lifting hook 3 at the moment, and the goods on the lifting hook 3 are prevented from falling.

In order to better prompt the worker, the hook protection device further comprises a tension sensor 8, a PLC (programmable logic controller) 9 and an audible and visual alarm 10, wherein the tension sensor 8 is provided with two connecting end detection ends which are respectively arranged at two ends of the tension sensor 8, the tension sensor 8 can adopt an S-shaped tension sensor Union Atlantic sensing system engineering company with the model of DYLY-103, the PLC 9 can adopt a PLC Siemens with the model of S7-300, the audible and visual alarm 10 can adopt an audible and visual alarm with the model of DC-SG110, Zhejiang east Industrial Automation company, the protection rope 5 comprises a first rope 11 and a second rope 12, one end of the first rope 11 is fixedly connected with the linkage wheel 4, the other end of the first rope is fixedly connected with one detection end of the tension sensor 8, one end of the second rope 12 is fixedly connected with the other detection end of the tension sensor 8, the other end of the PLC controller 9 is fixedly connected with the lifting hook 3, the PLC controller 9 and the audible and visual alarm 10 are both fixed at the arm end of the telescopic boom 1, the PLC controller 9 is respectively electrically connected with the audible and visual alarm 10 and the tension sensor 8, after the steel wire rope is broken, the rope I11 and the rope II 12 are both in a tensioning state, the tension electric signal output by the tension sensor 8 to the PLC controller 9 is greatly increased, a set tension threshold value is required to be arranged in the PLC controller 9, after the tension output by the tension sensor 8 is greater than the tension threshold value, the PLC controller 9 turns on the audible and visual alarm 10, the audible and visual alarm 10 generates alarm sound and changed light rays, so that a worker can find that the steel wire rope is broken in time, and when the goods are lifted in the air by the lifting hook 3, the worker controls the forklift, the telescopic boom 1 and the like to slowly place the goods on the ground, at the moment, the protection rope 5 does not play a role in bearing the goods, the pulling force output by the pulling force sensor 8 is smaller than the threshold value set in the PLC 9, and the audible and visual alarm 10 stops alarming immediately.

When the goods are hoisted, a worker controls the moving position of the goods through a forklift, the telescopic boom 1 and the winch 2, wherein when the winch 2 works, a driving part drives a winding wheel to rotate, the winding wheel rotates to drive the lifting hook 3 to ascend or descend through a steel wire rope, meanwhile, the winding wheel also drives a linkage wheel 4 to rotate, the linkage wheel 4 rotates to enable the protection rope 5 to be stored or loosened, the protection rope 5 is always in a proper loosening state, if the steel wire rope is broken, the protection rope 5 immediately plays a role in bearing the lifting hook 3 and the goods on the lifting hook, and the goods are prevented from falling off, wherein the proper loosening state of the protection rope 5 is that the protection rope 5 can be immediately straightened after the lifting hook 3 descends for a small distance after the steel wire rope is broken.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims (3)

1. The utility model provides a lifting hook protection device of fork truck hoist, its installs on the hoist, the hoist has flexible davit (1), hoist engine (2), lifting hook (3), install on fork truck's crotch flexible davit (1), hoist engine (2) and lifting hook (3) are all installed the arm head end of flexible davit (1), hoist engine (2) with lifting hook (3) are connected its characterized in that through the wire rope transmission: the lifting hook protection device comprises a linkage wheel (4) and a protection rope (5), wherein the linkage wheel (4) is identical to a winding wheel of the winch (2) in size and structure, the linkage wheel (4) is rotatably installed at the arm head end of the telescopic boom (1), the linkage wheel (4) is synchronously rotated with the winding wheel of the winch (2), one end of the protection rope (5) is fixed on the outer circumferential surface of the linkage wheel (4), and the other end of the protection rope is wound around the outer circumferential surface of the linkage wheel (4) and then is fixedly connected with the lifting hook (3).

2. A hook protector for a forklift spreader according to claim 1, in which: the winding wheel of the winch (2) is coaxially fixed with a first chain wheel (6), the linkage wheel (4) is coaxially fixed with a second chain wheel (7), and the first chain wheel (6) is identical to the second chain wheel (7) in size and structure and is in transmission connection with the second chain wheel (7) through a chain.

3. A hook protector for a forklift spreader according to claim 1, in which: still include tension sensor (8), PLC controller (9) and audible-visual annunciator (10), protection rope (5) comprise rope one (11) and rope two (12), the one end of rope one (11) with interlock wheel (4) fixed connection, and its other end with a detection end fixed connection of tension sensor (8), the one end of rope two (12) with another detection end fixed connection of tension sensor (8), and its other end with lifting hook (3) fixed connection, PLC controller (9) and audible-visual annunciator (10) are all fixed the arm head end of flexible davit (1), just PLC controller (9) respectively with audible-visual annunciator (10) and tension sensor (8) electricity is connected.

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